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Yu HC, Bai QR, Guo JJ, Chen MY, Wang L, Tong FC, Zhang SL, Wu J. Elucidating hydroxysafflor yellow A's multi-target mechanisms against alcoholic liver disease through integrative pharmacology. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 134:155956. [PMID: 39216301 DOI: 10.1016/j.phymed.2024.155956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 07/09/2024] [Accepted: 08/14/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND Alcoholic liver disease (ALD) significantly contributes to global liver-related morbidity and mortality. Natural products play a crucial role in the prevention and treatment of ALD. Hydroxysafflor yellow A (HSYA), a unique and primary component of Safflower (Carthamus tinctorius l.), exhibits diverse pharmacological activities. However, the impact and mechanism of HSYA on ALD have not been fully elucidated. PURPOSE The purpose of this study was to employ an integrative pharmacology approach to assess the multi-targeted mechanism of HSYA against ALD. METHODS Network pharmacology and molecular docking techniques were used to analyze the potential therapeutic signaling pathways and targets of HSYA against ALD. An ALD model in zebrafish larvae was established. Larvae were pretreated with HSYA and then exposed to ethanol. Liver injury was measured by fluorescence expression analysis in the liver-specific transgenic zebrafish line Tg (fabp10a:DsRed) and liver tissue H&E staining. Liver steatosis was determined by whole-mount oil red O staining and TG level. Additionally, an ethanol-induced hepatocyte injury model was established in vitro to observe hepatocyte damage (cell viability, ALT level), lipid accumulation (oil red O staining, TC and TG), and oxidative stress (ROS, MDA, GPx and SOD) in HepG2 cells treated with or without HSYA. Finally, qRT-PCR combined with network pharmacology and molecular docking was employed to validate the effects of HSYA on targets. RESULTS HSYA exhibited a significant, dose-dependent improvement in ethanol-induced liver injury in zebrafish larvae and HepG2 cells. Network pharmacology analysis revealed that HSYA may exert pharmacological effects against ALD through 341 potential targets. These targets are involved in various signaling pathways, including lipid metabolism and atherosclerosis, PI3K-Akt signaling pathway, MAPK signaling pathway, and ALD itself. Molecular docking studies displayed that HSYA had a strong binding affinity toward the domains of IL1B, IL6, TNF, PPARA, PPARG, HMGCR and ADH5. qRT-PCR assays demonstrated that HSYA effectively reversed the ethanol-induced aberrant gene expression of SREBF1, FASN, ACACA, CPT1A, PPARA, IL1B, IL6, TNFα, ADH5, and ALDH2 in vivo and in vitro. CONCLUSION This study offers a comprehensive investigation into the anti-ALD mechanisms of HSYA using an integrative pharmacology approach. The potential targets of HSYA may be implicated in enhancing ethanol catabolism, reducing lipid accumulation, mitigating oxidative stress, and inhibiting inflammatory response.
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Affiliation(s)
- Hai-Chuan Yu
- School of Medical Technology, Xinxiang Medical University, NO. 601 Jinsui Avenue, Xinxiang, Henan 453003, China.
| | - Qi-Rong Bai
- School of Pharmacy, Xinxiang Medical University, Xinxiang, China
| | - Jiao-Jie Guo
- School of Pharmacy, Xinxiang Medical University, Xinxiang, China
| | - Meng-Yao Chen
- School of Medical Technology, Xinxiang Medical University, NO. 601 Jinsui Avenue, Xinxiang, Henan 453003, China
| | - Lin Wang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Fang-Chao Tong
- School of Pharmacy, Xinxiang Medical University, Xinxiang, China
| | - Shuang-Ling Zhang
- School of Medical Technology, Xinxiang Medical University, NO. 601 Jinsui Avenue, Xinxiang, Henan 453003, China
| | - Jiao Wu
- School of Pharmacy, Xinxiang Medical University, Xinxiang, China.
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2
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Hu H, Wang S, Chen C. Pathophysiological role and potential drug target of NLRP3 inflammasome in the metabolic disorders. Cell Signal 2024; 122:111320. [PMID: 39067838 DOI: 10.1016/j.cellsig.2024.111320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 07/17/2024] [Accepted: 07/23/2024] [Indexed: 07/30/2024]
Abstract
NLRP3 plays a role in the development of autoinflammatory diseases. NLRP3, ASC, and Caspases 1 or 8 make up the NLRP3 inflammasome, which is an important part of innate immune system. The NLRP3 inflammasome-mediated inflammatory cytokines may also participate in metabolic disorders, such as diabetes, hyperlipidemia, atherosclerosis, non-alcoholic fatty liver disease, and gout. Hence, an overview of the NLRP3 regulation in these metabolic diseases and the potential drugs targeting NLRP3 is the focus of this review.
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Affiliation(s)
- Huiming Hu
- School of pharmacy, Nanchang Medical College, Nanchang, Jiangxi, China; School of Biomedical Sciences, University of Queensland, St Lucia, Brisbane, Queensland, Australia; Key Laboratory of Pharmacodynamics and Safety Evaluation, Health Commission of Jiangxi Province, Jiangxi, China
| | - Shuwen Wang
- Jiangxi University of Chinese Medicine, Nanchang, Jiangxi, China
| | - Chen Chen
- School of Biomedical Sciences, University of Queensland, St Lucia, Brisbane, Queensland, Australia.
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3
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Białek W, Hryniewicz-Jankowska A, Czechowicz P, Sławski J, Collawn JF, Czogalla A, Bartoszewski R. The lipid side of unfolded protein response. Biochim Biophys Acta Mol Cell Biol Lipids 2024; 1869:159515. [PMID: 38844203 DOI: 10.1016/j.bbalip.2024.159515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/16/2024] [Accepted: 05/31/2024] [Indexed: 06/12/2024]
Abstract
Although our current knowledge of the molecular crosstalk between the ER stress, the unfolded protein response (UPR), and lipid homeostasis remains limited, there is increasing evidence that dysregulation of either protein or lipid homeostasis profoundly affects the other. Most research regarding UPR signaling in human diseases has focused on the causes and consequences of disrupted protein folding. The UPR itself consists of very complex pathways that function to not only maintain protein homeostasis, but just as importantly, modulate lipid biogenesis to allow the ER to adjust and promote cell survival. Lipid dysregulation is known to activate many aspects of the UPR, but the complexity of this crosstalk remains a major research barrier. ER lipid disequilibrium and lipotoxicity are known to be important contributors to numerous human pathologies, including insulin resistance, liver disease, cardiovascular diseases, neurodegenerative diseases, and cancer. Despite their medical significance and continuous research, however, the molecular mechanisms that modulate lipid synthesis during ER stress conditions, and their impact on cell fate decisions, remain poorly understood. Here we summarize the current view on crosstalk and connections between altered lipid metabolism, ER stress, and the UPR.
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Affiliation(s)
- Wojciech Białek
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | | | - Paulina Czechowicz
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Jakub Sławski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - James F Collawn
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Aleksander Czogalla
- Department of Cytobiochemistry, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Rafał Bartoszewski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland.
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4
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Bonacina F, Zhang X, Manel N, Yvan-Charvet L, Razani B, Norata GD. Lysosomes in the immunometabolic reprogramming of immune cells in atherosclerosis. Nat Rev Cardiol 2024:10.1038/s41569-024-01072-4. [PMID: 39304748 DOI: 10.1038/s41569-024-01072-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/08/2024] [Indexed: 09/22/2024]
Abstract
Lysosomes have a central role in the disposal of extracellular and intracellular cargo and also function as metabolic sensors and signalling platforms in the immunometabolic reprogramming of macrophages and other immune cells in atherosclerosis. Lysosomes can rapidly sense the presence of nutrients within immune cells, thereby switching from catabolism of extracellular material to the recycling of intracellular cargo. Such a fine-tuned degradative response supports the generation of metabolic building blocks through effectors such as mTORC1 or TFEB. By coupling nutrients to downstream signalling and metabolism, lysosomes serve as a crucial hub for cellular function in innate and adaptive immune cells. Lysosomal dysfunction is now recognized to be a hallmark of atherogenesis. Perturbations in nutrient-sensing and signalling have profound effects on the capacity of immune cells to handle cholesterol, perform phagocytosis and efferocytosis, and limit the activation of the inflammasome and other inflammatory pathways. Strategies to improve lysosomal function hold promise as novel modulators of the immunoinflammatory response associated with atherosclerosis. In this Review, we describe the crosstalk between lysosomal biology and immune cell function and polarization, with a particular focus on cellular immunometabolic reprogramming in the context of atherosclerosis.
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Affiliation(s)
- Fabrizia Bonacina
- Department of Excellence of Pharmacological and Biomolecular Sciences 'Rodolfo Paoletti', Università degli Studi di Milano, Milan, Italy
| | - Xiangyu Zhang
- Vascular Medicine Institute, Department of Medicine, University of Pittsburgh School of Medicine and UPMC, Pittsburgh, PA, USA
- Pittsburgh VA Medical Center, Pittsburgh, PA, USA
| | - Nicolas Manel
- Immunity and Cancer Department, Institut Curie, PSL Research University, INSERM U932, Paris, France
| | - Laurent Yvan-Charvet
- Institut National de la Santé et de la Recherche Médicale (Inserm) U1065, Université Côte d'Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), Fédération Hospitalo-Universitaire (FHU), Oncoage, Nice, France
| | - Babak Razani
- Vascular Medicine Institute, Department of Medicine, University of Pittsburgh School of Medicine and UPMC, Pittsburgh, PA, USA
- Pittsburgh VA Medical Center, Pittsburgh, PA, USA
| | - Giuseppe D Norata
- Department of Excellence of Pharmacological and Biomolecular Sciences 'Rodolfo Paoletti', Università degli Studi di Milano, Milan, Italy.
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Velma GR, Laham MS, Lewandowski C, Valencia-Olvera AC, Balu D, Moore A, Ackerman-Berrier M, Rychetsky P, Penton C, Musku SR, Annadurai A, Sulaiman MI, Ma N, J Thatcher GR. Nonlipogenic ABCA1 Inducers (NLAI) for Alzheimer's Disease Validated in a Mouse Model Expressing Human APOE3/APOE4. J Med Chem 2024; 67:15061-15079. [PMID: 39191400 PMCID: PMC11404489 DOI: 10.1021/acs.jmedchem.4c00733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
Therapeutics enhancing apolipoprotein (APOE) positive function are a priority, because APOE4 is the major genetic risk factor for Alzheimer's disease (AD). The function of APOE, the key constituent of lipoprotein particles that transport cholesterol and lipids in the brain, is dependent on lipidation by ABCA1, a cell-membrane cholesterol transporter. ABCA1 transcription is regulated by liver X receptors (LXR): agonists have been shown to increase ABCA1, often accompanied by unwanted lipogenesis and elevated triglycerides (TG). Therefore, nonlipogenic ABCA1-inducers (NLAI) are needed. Two rounds of optimization of an HTS hit, derived from a phenotypic screen, gave lead compound 39 that was validated and tested in E3/4FAD mice that express human APOE3/4 and five mutant APP and PSEN1 human transgenes. Treatment with 39 increased ABCA1 expression, enhanced APOE lipidation, and reversed multiple AD phenotypes, without increasing TG. This NLAI/LXR-agonist study is the first in a human APOE-expressing model with hallmark amyloid-β pathology.
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Affiliation(s)
- Ganga Reddy Velma
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Megan S Laham
- Department of Chemistry & Biochemistry, Colleges of Science & Medicine, University of Arizona, Tucson, Arizona 85721, United States
| | - Cutler Lewandowski
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Ana C Valencia-Olvera
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Deebika Balu
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Annabelle Moore
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Martha Ackerman-Berrier
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Pavel Rychetsky
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Christopher Penton
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Soumya Reddy Musku
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Anandhan Annadurai
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Maha Ibrahim Sulaiman
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Nina Ma
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Gregory R J Thatcher
- Department of Pharmacology & Toxicology, R Ken Coit College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
- Department of Chemistry & Biochemistry, Colleges of Science & Medicine, University of Arizona, Tucson, Arizona 85721, United States
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Shi P, Zheng B, Zhang S, Guo Q. A review of the sources and pharmacological research of morroniside. Front Pharmacol 2024; 15:1423062. [PMID: 39301568 PMCID: PMC11411571 DOI: 10.3389/fphar.2024.1423062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 08/19/2024] [Indexed: 09/22/2024] Open
Abstract
Introduction Morroniside (Mor) is a bioactive compound found in Corni Fructus (CF) [Cornaceae; Cornus officinalis Siebold & Zucc.], which has been used as medicine and food in China, Korea, and Japan for over 2,000 years. This review summarizes recent progress on Mor, specifically focusing on its distribution, isolation, detection, and various pharmacological effects. Methods A literature survey on Mor was conducted using electronic databases such as PubMed, ScienceDirect, CNKI, and Google Scholar. After removing TCM prescription-related standards, medicinal herb processing-related research, and other irrelevant works of literature, we obtained relevant information on Mor's biological and pharmacological properties. Results The main conclusions are as follows: Mor is widely distributed in the plant kingdom; the methods for extracting and isolating Mor are well established; and the technology for detecting it is accurate. Mor exhibits numerous pharmacological effects. Along with CF, Mor has shown renoprotective effects against diabetes, hepatoprotective effects against diabetes, triptolide, and nonalcoholic steatohepatitis, and boneprotective effects against osteoporosis and osteoarthritis. In addition, researchers have also explored other pharmacological effects of Mor, including neuroprotective effects against focal cerebral ischemia, spinal cord injury, and Alzheimer's disease; cardioprotective effects against acute myocardial infarction; protection of the digestive system from gastritis, inflammatory bowel disease, and colitis; protection of the skin by promoting hair growth, wound healing, and flap survival; and protection of the lungs from acute lung injury and pulmonary fibrosis. Moreover, Mor has anti-obesity effects, anti-inflammatory effects in the eye, and improves follicular development. Discussion Overall, this review provides a comprehensive understanding of the pharmacological effects of Mor, from which the limitations of the current research can be understood, which will help facilitate future research.
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Affiliation(s)
- Pengliang Shi
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Bingqing Zheng
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shiyao Zhang
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Qingmei Guo
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
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7
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Xiao MY, Pei WJ, Li S, Li FF, Xie P, Luo HT, Hyun Yoo H, Piao XL. Gypenoside L inhibits hepatocellular carcinoma by targeting the SREBP2-HMGCS1 axis and enhancing immune response. Bioorg Chem 2024; 150:107539. [PMID: 38861912 DOI: 10.1016/j.bioorg.2024.107539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/30/2024] [Accepted: 06/06/2024] [Indexed: 06/13/2024]
Abstract
Hepatocellular carcinoma (HCC) is a malignant tumor that occurs in the liver, with a high degree of malignancy and relatively poor prognosis. Gypenoside L has inhibitory effects on liver cancer cells. However, its mechanism of action is still unclear. This study aims to investigate the inhibitory effects of gypenoside L on HCC in vitro and in vivo, and explore its potential mechanisms. The results showed that gypenoside L reduced the cholesterol and triglyceride content in HepG2 and Huh-7 cells, inhibited cell proliferation, invasion and metastasis, arrested cell cycle at G0/G1 phase, promoted cell apoptosis. Mechanistically, it targeted the transcription factor SREPB2 to inhibit the expression of HMGCS1 protein and inhibited the downstream proteins HMGCR and MVK, thereby regulating the mevalonate (MVA) pathway. Overexpression HMGCS1 led to significant alterations in the cholesterol metabolism pathway of HCC, which mediated HCC cell proliferation and conferred resistance to the therapeutic effect of gypenoside L. In vivo, gypenoside L effectively suppressed HCC growth in tumor-bearing mice by reducing cholesterol production, exhibiting favorable safety profiles and minimal toxic side effects. Gypenoside L modulated cholesterol homeostasis, enhanced expression of inflammatory factors by regulating MHC I pathway-related proteins to augment anticancer immune responses. Clinical samples from HCC patients also exhibited high expression levels of MVA pathway-related genes in tumor tissues. These findings highlight gypenoside L as a promising agent for targeting cholesterol metabolism in HCC while emphasizing the effectiveness of regulating the SREBP2-HMGCS1 axis as a therapeutic strategy.
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MESH Headings
- Humans
- Carcinoma, Hepatocellular/drug therapy
- Carcinoma, Hepatocellular/pathology
- Carcinoma, Hepatocellular/metabolism
- Gynostemma/chemistry
- Liver Neoplasms/drug therapy
- Liver Neoplasms/pathology
- Liver Neoplasms/metabolism
- Sterol Regulatory Element Binding Protein 2/metabolism
- Sterol Regulatory Element Binding Protein 2/antagonists & inhibitors
- Cell Proliferation/drug effects
- Animals
- Mice
- Dose-Response Relationship, Drug
- Molecular Structure
- Drug Screening Assays, Antitumor
- Apoptosis/drug effects
- Structure-Activity Relationship
- Antineoplastic Agents, Phytogenic/pharmacology
- Antineoplastic Agents, Phytogenic/chemistry
- Mice, Inbred BALB C
- Mice, Nude
- Liver Neoplasms, Experimental/drug therapy
- Liver Neoplasms, Experimental/pathology
- Liver Neoplasms, Experimental/metabolism
- Plant Extracts
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Affiliation(s)
- Man-Yu Xiao
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Wen-Jing Pei
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Si Li
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Fang-Fang Li
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Peng Xie
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Hao-Tian Luo
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, China; School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Hye Hyun Yoo
- Pharmacomicrobiomics Research Center, College of Pharmacy, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea.
| | - Xiang-Lan Piao
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing 100081, China; School of Pharmacy, Minzu University of China, Beijing 100081, China.
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8
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Moulton MJ, Atala K, Zheng Y, Dutta D, Grange DK, Lin WW, Wegner DJ, Wambach JA, Duker AL, Bober MB, Kratz L, Wise CA, Oxendine I, Khanshour A, Wangler MF, Yamamoto S, Cole FS, Rios J, Bellen HJ. Dominant missense variants in SREBF2 are associated with complex dermatological, neurological, and skeletal abnormalities. Genet Med 2024; 26:101174. [PMID: 38847193 DOI: 10.1016/j.gim.2024.101174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 07/21/2024] Open
Abstract
PURPOSE We identified 2 individuals with de novo variants in SREBF2 that disrupt a conserved site 1 protease (S1P) cleavage motif required for processing SREBP2 into its mature transcription factor. These individuals exhibit complex phenotypic manifestations that partially overlap with sterol regulatory element binding proteins (SREBP) pathway-related disease phenotypes, but SREBF2-related disease has not been previously reported. Thus, we set out to assess the effects of SREBF2 variants on SREBP pathway activation. METHODS We undertook ultrastructure and gene expression analyses using fibroblasts from an affected individual and utilized a fly model of lipid droplet (LD) formation to investigate the consequences of SREBF2 variants on SREBP pathway function. RESULTS We observed reduced LD formation, endoplasmic reticulum expansion, accumulation of aberrant lysosomes, and deficits in SREBP2 target gene expression in fibroblasts from an affected individual, indicating that the SREBF2 variant inhibits SREBP pathway activation. Using our fly model, we discovered that SREBF2 variants fail to induce LD production and act in a dominant-negative manner, which can be rescued by overexpression of S1P. CONCLUSION Taken together, these data reveal a mechanism by which SREBF2 pathogenic variants that disrupt the S1P cleavage motif cause disease via dominant-negative antagonism of S1P, limiting the cleavage of S1P targets, including SREBP1 and SREBP2.
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Affiliation(s)
- Matthew J Moulton
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX
| | - Kristhen Atala
- Center for Translational Research, Scottish Rite for Children, Dallas, TX
| | - Yiming Zheng
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX; Current address: State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, China
| | - Debdeep Dutta
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX
| | - Dorothy K Grange
- Edward Mallinckrodt Department of Pediatrics, Washington University in St. Louis School of Medicine and St. Louis Children's Hospital, St. Louis, MO
| | - Wen-Wen Lin
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX
| | - Daniel J Wegner
- Edward Mallinckrodt Department of Pediatrics, Washington University in St. Louis School of Medicine and St. Louis Children's Hospital, St. Louis, MO
| | - Jennifer A Wambach
- Edward Mallinckrodt Department of Pediatrics, Washington University in St. Louis School of Medicine and St. Louis Children's Hospital, St. Louis, MO
| | - Angela L Duker
- Skeletal Dysplasia Program, Orthogenetics, Nemours Children's Hospital, Wilmington, DE
| | - Michael B Bober
- Skeletal Dysplasia Program, Orthogenetics, Nemours Children's Hospital, Wilmington, DE
| | - Lisa Kratz
- Kennedy Krieger Institute, Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Carol A Wise
- Center for Translational Research, Scottish Rite for Children, Dallas, TX; Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX; Department of Orthopedic Surgery, University of Texas Southwestern Medical Center, Dallas, TX
| | - Ila Oxendine
- Center for Translational Research, Scottish Rite for Children, Dallas, TX
| | - Anas Khanshour
- Center for Translational Research, Scottish Rite for Children, Dallas, TX
| | - Michael F Wangler
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX
| | - Shinya Yamamoto
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX
| | - F Sessions Cole
- Edward Mallinckrodt Department of Pediatrics, Washington University in St. Louis School of Medicine and St. Louis Children's Hospital, St. Louis, MO
| | - Jonathan Rios
- Center for Translational Research, Scottish Rite for Children, Dallas, TX; Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX; Department of Orthopedic Surgery, University of Texas Southwestern Medical Center, Dallas, TX
| | - Hugo J Bellen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX.
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9
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Jonker PB, Muir A. Metabolic ripple effects - deciphering how lipid metabolism in cancer interfaces with the tumor microenvironment. Dis Model Mech 2024; 17:dmm050814. [PMID: 39284708 DOI: 10.1242/dmm.050814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2024] Open
Abstract
Cancer cells require a constant supply of lipids. Lipids are a diverse class of hydrophobic molecules that are essential for cellular homeostasis, growth and survival, and energy production. How tumors acquire lipids is under intensive investigation, as these mechanisms could provide attractive therapeutic targets for cancer. Cellular lipid metabolism is tightly regulated and responsive to environmental stimuli. Thus, lipid metabolism in cancer is heavily influenced by the tumor microenvironment. In this Review, we outline the mechanisms by which the tumor microenvironment determines the metabolic pathways used by tumors to acquire lipids. We also discuss emerging literature that reveals that lipid availability in the tumor microenvironment influences many metabolic pathways in cancers, including those not traditionally associated with lipid biology. Thus, metabolic changes instigated by the tumor microenvironment have 'ripple' effects throughout the densely interconnected metabolic network of cancer cells. Given the interconnectedness of tumor metabolism, we also discuss new tools and approaches to identify the lipid metabolic requirements of cancer cells in the tumor microenvironment and characterize how these requirements influence other aspects of tumor metabolism.
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Affiliation(s)
- Patrick B Jonker
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL 60637, USA
| | - Alexander Muir
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL 60637, USA
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10
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Kim H, Choi IA, Umemoto A, Bae S, Kaneko K, Mizuno M, Giannopoulou E, Pannellini T, Deng L, Park-Min KH. SREBP2 restricts osteoclast differentiation and activity by regulating IRF7 and limits inflammatory bone erosion. Bone Res 2024; 12:48. [PMID: 39191742 DOI: 10.1038/s41413-024-00354-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 07/03/2024] [Accepted: 07/16/2024] [Indexed: 08/29/2024] Open
Abstract
Osteoclasts are multinucleated bone-resorbing cells, and their formation is tightly regulated to prevent excessive bone loss. However, the mechanisms by which osteoclast formation is restricted remain incompletely determined. Here, we found that sterol regulatory element binding protein 2 (SREBP2) functions as a negative regulator of osteoclast formation and inflammatory bone loss. Cholesterols and SREBP2, a key transcription factor for cholesterol biosynthesis, increased in the late phase of osteoclastogenesis. The ablation of SREBP2 in myeloid cells resulted in increased in vivo and in vitro osteoclastogenesis, leading to low bone mass. Moreover, deletion of SREBP2 accelerated inflammatory bone destruction in murine inflammatory osteolysis and arthritis models. SREBP2-mediated regulation of osteoclastogenesis is independent of its canonical function in cholesterol biosynthesis but is mediated, in part, by its downstream target, interferon regulatory factor 7 (IRF7). Taken together, our study highlights a previously undescribed role of the SREBP2-IRF7 regulatory circuit as a negative feedback loop in osteoclast differentiation and represents a novel mechanism to restrain pathological bone destruction.
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Affiliation(s)
- Haemin Kim
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
- Department of Medicine, Weill Cornell Medical College, New York, NY, 10021, USA
- CHA Biomedical Research Institute, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, 13496, Republic of Korea
| | - In Ah Choi
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
- Department of Internal Medicine, College of Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Akio Umemoto
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
| | - Seyeon Bae
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
- Department of Medicine, Weill Cornell Medical College, New York, NY, 10021, USA
| | - Kaichi Kaneko
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
| | - Masataka Mizuno
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
| | - Eugenia Giannopoulou
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
- Biological Sciences Department, New York City College of Technology, City University of New York, Brooklyn, NY, 11201, USA
| | - Tania Pannellini
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA
| | - Liang Deng
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
- Department of Dermatology, Weill Cornell Medical College, New York, NY, 10021, USA
| | - Kyung-Hyun Park-Min
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, 11366, USA.
- Department of Medicine, Weill Cornell Medical College, New York, NY, 10021, USA.
- BCMB Allied Program, Weill Cornell Graduate School of Medical Sciences, New York, NY, 10065, USA.
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11
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Gluba-Sagr A, Franczyk B, Rysz-Górzyńska A, Olszewski R, Rysz J. The Role of Selected lncRNAs in Lipid Metabolism and Cardiovascular Disease Risk. Int J Mol Sci 2024; 25:9244. [PMID: 39273193 PMCID: PMC11395304 DOI: 10.3390/ijms25179244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 07/17/2024] [Accepted: 07/18/2024] [Indexed: 09/15/2024] Open
Abstract
Lipid disorders increase the risk for the development of cardiometabolic disorders, including type 2 diabetes, atherosclerosis, and cardiovascular disease. Lipids levels, apart from diet, smoking, obesity, alcohol consumption, and lack of exercise, are also influenced by genetic factors. Recent studies suggested the role of long noncoding RNAs (lncRNAs) in the regulation of lipid formation and metabolism. Despite their lack of protein-coding capacity, lncRNAs are crucial regulators of various physiological and pathological processes since they affect the transcription and epigenetic chromatin remodelling. LncRNAs act as molecular signal, scaffold, decoy, enhancer, and guide molecules. This review summarises available data concerning the impact of lncRNAs on lipid levels and metabolism, as well as impact on cardiovascular disease risk. This relationship is significant because altered lipid metabolism is a well-known risk factor for cardiovascular diseases, and lncRNAs may play a crucial regulatory role. Understanding these mechanisms could pave the way for new therapeutic strategies to mitigate cardiovascular disease risk through targeted modulation of lncRNAs. The identification of dysregulated lncRNAs may pose promising candidates for therapeutic interventions, since strategies enabling the restoration of their levels could offer an effective means to impede disease progression without disrupting normal biological functions. LncRNAs may also serve as valuable biomarker candidates for various pathological states, including cardiovascular disease. However, still much remains unknown about the functions of most lncRNAs, thus extensive studies are necessary elucidate their roles in physiology, development, and disease.
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Affiliation(s)
- Anna Gluba-Sagr
- Department of Nephrology, Hypertension and Family Medicine, Medical University of Lodz, 90-549 Lodz, Poland
| | - Beata Franczyk
- Department of Nephrology, Hypertension and Family Medicine, Medical University of Lodz, 90-549 Lodz, Poland
| | - Aleksandra Rysz-Górzyńska
- Department of Ophthalmology and Visual Rehabilitation, Medical University of Lodz, 90-549 Lodz, Poland
| | - Robert Olszewski
- Department of Gerontology, Public Health and Didactics, National Institute of Geriatrics, Rheumatology and Rehabilitation in Warsaw, 02-637 Warsaw, Poland
| | - Jacek Rysz
- Department of Nephrology, Hypertension and Family Medicine, Medical University of Lodz, 90-549 Lodz, Poland
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12
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Becker AP, Biletch E, Kennelly JP, Julio AR, Villaneuva M, Nagari RT, Turner DW, Burton NR, Fukuta T, Cui L, Xiao X, Hong SG, Mack JJ, Tontonoz P, Backus KM. Lipid- and protein-directed photosensitizer proximity labeling captures the cholesterol interactome. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.20.608660. [PMID: 39229057 PMCID: PMC11370482 DOI: 10.1101/2024.08.20.608660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 09/05/2024]
Abstract
The physical properties of cellular membranes, including fluidity and function, are influenced by protein and lipid interactions. In situ labeling chemistries, most notably proximity-labeling interactomics are well suited to characterize these dynamic and often fleeting interactions. Established methods require distinct chemistries for proteins and lipids, which limits the scope of such studies. Here we establish a singlet-oxygen-based photocatalytic proximity labeling platform (POCA) that reports intracellular interactomes for both proteins and lipids with tight spatiotemporal resolution using cell-penetrant photosensitizer reagents. Using both physiologically relevant lipoprotein-complexed probe delivery and genetic manipulation of cellular cholesterol handling machinery, cholesterol-directed POCA captured established and unprecedented cholesterol binding proteins, including protein complexes sensitive to intracellular cholesterol levels and proteins uniquely captured by lipoprotein uptake. Protein-directed POCA accurately mapped known intracellular membrane complexes, defined sterol-dependent changes to the non-vesicular cholesterol transport protein interactome, and captured state-dependent changes in the interactome of the cholesterol transport protein Aster-B. More broadly, we find that POCA is a versatile interactomics platform that is straightforward to implement, using the readily available HaloTag system, and fulfills unmet needs in intracellular singlet oxygen-based proximity labeling proteomics. Thus, we expect widespread utility for POCA across a range of interactome applications, spanning imaging to proteomics.
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Affiliation(s)
- Andrew P Becker
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA
| | - Elijah Biletch
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA
| | - John Paul Kennelly
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, Los Angeles, California 90095, USA
| | - Ashley R Julio
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA
| | - Miranda Villaneuva
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA
- Molecular Biology Institute, UCLA, Los Angeles, California 90095, USA
| | - Rohith T Nagari
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, Los Angeles, California 90095, USA
- Molecular Biology Institute, UCLA, Los Angeles, California 90095, USA
| | - Daniel W Turner
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA
| | - Nikolas R Burton
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA
| | - Tomoyuki Fukuta
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Liujuan Cui
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, Los Angeles, California 90095, USA
| | - Xu Xiao
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, Los Angeles, California 90095, USA
| | - Soon-Gook Hong
- Molecular Biology Institute, UCLA, Los Angeles, California 90095, USA
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
| | - Julia J Mack
- Molecular Biology Institute, UCLA, Los Angeles, California 90095, USA
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
| | - Peter Tontonoz
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, Los Angeles, California 90095, USA
| | - Keriann M Backus
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, California 90095, USA
- Molecular Biology Institute, UCLA, Los Angeles, California 90095, USA
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, UCLA, Los Angeles, California 90095, USA
- Jonsson Cancer Center, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, USA
- UCLA-DOE Institute for Genomics and Proteomics, UCLA, Los Angeles, California 90095, USA
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13
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Tian J, Goldstein JL, Li S, Schumacher MM, Brown MS. Phosphorylation of Insig-2 mediates inhibition of fatty acid synthesis by polyunsaturated fatty acids. Proc Natl Acad Sci U S A 2024; 121:e2409262121. [PMID: 39145929 PMCID: PMC11348305 DOI: 10.1073/pnas.2409262121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 07/23/2024] [Indexed: 08/16/2024] Open
Abstract
Insig-1 and Insig-2 are endoplasmic reticulum (ER) proteins that inhibit lipid synthesis by blocking transport of sterol regulatory element-binding proteins (SREBP-1 and SREBP-2) from ER to Golgi. In the Golgi, SREBPs are processed proteolytically to release their transcription-activating domains, which enhance the synthesis of fatty acids, triglycerides, and cholesterol. Heretofore, the two Insigs have redundant functions, and there is no rationale for two isoforms. The current data identify a specific function for Insig-2. We show that eicosapentaenoic acid (EPA), a polyunsaturated fatty acid, inhibits fatty acid synthesis in human fibroblasts and rat hepatocytes by activating adenylate cyclase, which induces protein kinase A (PKA) to phosphorylate serine-106 in Insig-2. Phosphorylated Insig-2 inhibits the proteolytic processing of SREBP-1, thereby blocking fatty acid synthesis. Phosphorylated Insig-2 does not block the processing of SREBP-2, which activates cholesterol synthesis. Insig-1 lacks serine-106 and is not phosphorylated at this site. EPA inhibition of SREBP-1 processing was reduced by the replacement of serine-106 in Insig-2 with alanine or by treatment with KT5720, a PKA inhibitor. Inhibition did not occur in mutant human fibroblasts that possess Insig-1 but lack Insig-2. These data provide an Insig-2-specific mechanism for the long-known inhibition of fatty acid synthesis by polyunsaturated fatty acids.
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Affiliation(s)
- Jing Tian
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX75390
| | - Joseph L. Goldstein
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX75390
| | - Shili Li
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX75390
| | - Marc M. Schumacher
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX75390
| | - Michael S. Brown
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX75390
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14
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Xu X, Jin W, Chang R, Ding X. Research progress of SREBP and its role in the pathogenesis of autoimmune rheumatic diseases. Front Immunol 2024; 15:1398921. [PMID: 39224584 PMCID: PMC11366632 DOI: 10.3389/fimmu.2024.1398921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Accepted: 07/31/2024] [Indexed: 09/04/2024] Open
Abstract
Autoimmune rheumatic diseases comprise a group of immune-related disorders characterized by non-organ-specific inflammation. These diseases include systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), ankylosing spondylitis (AS), gout, among others. Typically involving the hematologic system, these diseases may also affect multiple organs and systems. The pathogenesis of autoimmune rheumatic immune diseases is complex, with diverse etiologies, all associated with immune dysfunction. The current treatment options for this type of disease are relatively limited and come with certain side effects. Therefore, the urgent challenge remains to identify novel therapeutic targets for these diseases. Sterol regulatory element-binding proteins (SREBPs) are basic helix-loop-helix-leucine zipper transcription factors that regulate the expression of genes involved in lipid and cholesterol biosynthesis. The expression and transcriptional activity of SREBPs can be modulated by extracellular stimuli such as polyunsaturated fatty acids, amino acids, glucose, and energy pathways including AKT-mTORC and AMP-activated protein kinase (AMPK). Studies have shown that SREBPs play roles in regulating lipid metabolism, cytokine production, inflammation, and the proliferation of germinal center B (GCB) cells. These functions are significant in the pathogenesis of rheumatic and immune diseases (Graphical abstract). Therefore, this paper reviews the potential mechanisms of SREBPs in the development of SLE, RA, and gout, based on an exploration of their functions.
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Affiliation(s)
| | | | | | - Xinghong Ding
- Key Laboratory of Chinese Medicine Rheumatology of Zhejiang Province, School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
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15
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Lee J, Roh JL. Cholesterol-ferroptosis nexus: Unveiling novel cancer therapeutic avenues. Cancer Lett 2024; 597:217046. [PMID: 38852702 DOI: 10.1016/j.canlet.2024.217046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 06/02/2024] [Accepted: 06/05/2024] [Indexed: 06/11/2024]
Abstract
Ferroptosis, a novel form of regulated cell death characterized by iron-mediated lipid peroxidation, holds immense potential in cancer therapeutics due to its role in tumor progression and resistance. This review predominantly explores the intricate relationship between ferroptosis and cholesterol metabolism pathways, mainly focusing on the cholesterol biosynthesis pathway. This review highlights the therapeutic implications of targeting cholesterol metabolism pathways for cancer treatment by delving into the mechanisms underlying ferroptosis regulation. Strategies such as inhibiting HMG-CoA reductase and suppressing squalene synthesis offer promising avenues for inducing ferroptosis in cancer cells. Moreover, insights into targeting the 7-dehydrocholesterol pathway provide novel perspectives on modulating ferroptosis susceptibility and managing ferroptosis-associated diseases. Understanding the interplay between ferroptosis and cholesterol metabolism pathways underscores the potential of lipid metabolism modulation as an innovative therapeutic approach in cancer treatment.
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Affiliation(s)
- Jaewang Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea; Department of Biomedical Science, General Graduate School, CHA University, Pocheon, Republic of Korea
| | - Jong-Lyel Roh
- Department of Otorhinolaryngology-Head and Neck Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea; Department of Biomedical Science, General Graduate School, CHA University, Pocheon, Republic of Korea.
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16
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Theusch E, Ting FY, Qin Y, Stevens K, Naidoo D, King SM, Yang NV, Orr J, Han BY, Cyster JG, Chen YDI, Rotter JI, Krauss RM, Medina MW. Participant-derived cell line transcriptomic analyses and mouse studies reveal a role for ZNF335 in plasma cholesterol statin response. Genome Med 2024; 16:93. [PMID: 39061094 PMCID: PMC11282643 DOI: 10.1186/s13073-024-01366-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 07/18/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND Statins lower circulating low-density lipoprotein cholesterol (LDLC) levels and reduce cardiovascular disease risk. Though highly efficacious in general, there is considerable inter-individual variation in statin efficacy that remains largely unexplained. METHODS To identify novel genes that may modulate statin-induced LDLC lowering, we used RNA-sequencing data from 426 control- and 2 µM simvastatin-treated lymphoblastoid cell lines (LCLs) derived from European and African American ancestry participants of the Cholesterol and Pharmacogenetics (CAP) 40 mg/day 6-week simvastatin clinical trial (ClinicalTrials.gov Identifier: NCT00451828). We correlated statin-induced changes in LCL gene expression with plasma LDLC statin response in the corresponding CAP participants. For the most correlated gene identified (ZNF335), we followed up in vivo by comparing plasma cholesterol levels, lipoprotein profiles, and lipid statin response between wild-type mice and carriers of a hypomorphic (partial loss of function) missense mutation in Zfp335 (the mouse homolog of ZNF335). RESULTS The statin-induced expression changes of 147 human LCL genes were significantly correlated to the plasma LDLC statin responses of the corresponding CAP participants in vivo (FDR = 5%). The two genes with the strongest correlations were zinc finger protein 335 (ZNF335 aka NIF-1, rho = 0.237, FDR-adj p = 0.0085) and CCR4-NOT transcription complex subunit 3 (CNOT3, rho = 0.233, FDR-adj p = 0.0085). Chow-fed mice carrying a hypomorphic missense (R1092W; aka bloto) mutation in Zfp335 had significantly lower non-HDL cholesterol levels than wild-type C57BL/6J mice in a sex combined model (p = 0.04). Furthermore, male (but not female) mice carrying the Zfp335R1092W allele had significantly lower total and HDL cholesterol levels than wild-type mice. In a separate experiment, wild-type mice fed a control diet for 4 weeks and a matched simvastatin diet for an additional 4 weeks had significant statin-induced reductions in non-HDLC (-43 ± 18% and -23 ± 19% for males and females, respectively). Wild-type male (but not female) mice experienced significant reductions in plasma LDL particle concentrations, while male mice carrying Zfp335R1092W allele(s) exhibited a significantly blunted LDL statin response. CONCLUSIONS Our in vitro and in vivo studies identified ZNF335 as a novel modulator of plasma cholesterol levels and statin response, suggesting that variation in ZNF335 activity could contribute to inter-individual differences in statin clinical efficacy.
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Affiliation(s)
- Elizabeth Theusch
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA.
| | - Flora Y Ting
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
| | - Yuanyuan Qin
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
| | - Kristen Stevens
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
| | - Devesh Naidoo
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
| | - Sarah M King
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
| | - Neil V Yang
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
| | - Joseph Orr
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
| | - Brenda Y Han
- Howard Hughes Medical Institute, Department of Microbiology and Immunology, University of California San Francisco, San Francisco, CA, USA
| | - Jason G Cyster
- Howard Hughes Medical Institute, Department of Microbiology and Immunology, University of California San Francisco, San Francisco, CA, USA
| | - Yii-Der I Chen
- The Institute for Translational Genomics and Population Sciences, Department of Pediatrics, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Jerome I Rotter
- The Institute for Translational Genomics and Population Sciences, Department of Pediatrics, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Ronald M Krauss
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA
- Department of Medicine, University of California San Francisco, Oakland, CA, USA
| | - Marisa W Medina
- Department of Pediatrics, University of California San Francisco, Oakland, CA, USA.
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17
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He K, Zhao Z, Zhang J, Li D, Wang S, Liu Q. Cholesterol Metabolism in Neurodegenerative Diseases. Antioxid Redox Signal 2024. [PMID: 38842175 DOI: 10.1089/ars.2024.0674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Significance: Cholesterol plays a crucial role in the brain, where it is highly concentrated and tightly regulated to support normal brain functions. It serves as a vital component of cell membranes, ensuring their integrity, and acts as a key regulator of various brain processes. Dysregulation of cholesterol metabolism in the brain has been linked to impaired brain function and the onset of neurodegenerative diseases such as Alzheimer's disease (AD), Parkinson's disease, and Huntington's disease. Recent Advances: A significant advancement has been the identification of astrocyte-derived apoliprotein E as a key regulator of de novo cholesterol biosynthesis in neurons, providing insights into how extracellular signals influence neuronal cholesterol levels. In addition, the development of antibody-based therapies, particularly for AD, presents promising opportunities for therapeutic interventions. Critical Issues: Despite significant research, the association between cholesterol and neurodegenerative diseases remains inconclusive. It is crucial to distinguish between plasma cholesterol and brain cholesterol, as these pools are relatively independent. This differentiation should be considered when evaluating statin-based treatment approaches. Furthermore, assessing not only the total cholesterol content in the brain but also its distribution among different types of brain cells is essential. Future Direction: Establishing a causal link between changes in brain/plasma cholesterol levels and the onset of brain dysfunction/neurodegenerative diseases remains a key objective. In addition, conducting cell-specific analyses of cholesterol homeostasis in various types of brain cells under pathological conditions will enhance our understanding of cholesterol metabolism in neurodegenerative diseases. Manipulating cholesterol levels to restore homeostasis may represent a novel approach for alleviating neurological symptoms.
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Affiliation(s)
- Keqiang He
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Zhiwei Zhao
- Department of Cardiovascular Surgery, the First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at the Microscale, Division of Life Sciences and Medicine, University of Science and Technology of China
| | - Juan Zhang
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China
- CAS Key Laboratory of Brain Function and Diseases, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Institute on Aging and Brain Disorders, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Dingfeng Li
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China
- CAS Key Laboratory of Brain Function and Diseases, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Institute on Aging and Brain Disorders, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Sheng Wang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Qiang Liu
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China
- CAS Key Laboratory of Brain Function and Diseases, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Institute on Aging and Brain Disorders, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
- Neurodegenerative Disorder Research Center, Anhui Province Key Laboratory of Biomedical Aging Research, University of Science and Technology of China, Hefei, China
- Key Laboratory of Immune Response and Immunotherapy, University of Science and Technology of China, Hefei, China
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18
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Kettel P, Karagöz GE. Endoplasmic reticulum: Monitoring and maintaining protein and membrane homeostasis in the endoplasmic reticulum by the unfolded protein response. Int J Biochem Cell Biol 2024; 172:106598. [PMID: 38768891 DOI: 10.1016/j.biocel.2024.106598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/01/2024] [Accepted: 05/14/2024] [Indexed: 05/22/2024]
Abstract
The endoplasmic reticulum (ER) regulates essential cellular processes, including protein folding, lipid synthesis, and calcium homeostasis. The ER homeostasis is maintained by a conserved set of signaling cascades called the Unfolded Protein Response (UPR). How the UPR senses perturbations in ER homeostasis has been the subject of active research for decades. In metazoans, the UPR consists of three ER-membrane embedded sensors: IRE1, PERK and ATF6. These sensors detect the accumulation of misfolded proteins in the ER lumen and adjust protein folding capacity according to cellular needs. Early work revealed that the ER-resident chaperone BiP binds to all three UPR sensors in higher eukaryotes and BiP binding was suggested to regulate their activity. More recent data have shown that in higher eukaryotes the interaction of the UPR sensors with a complex network of chaperones and misfolded proteins modulates their activation and deactivation dynamics. Furthermore, emerging evidence suggests that the UPR monitors ER membrane integrity beyond protein folding defects. However, the mechanistic and structural basis of UPR activation by proteotoxic and lipid bilayer stress in higher eukaryotes remains only partially understood. Here, we review the current understanding of novel protein interaction networks and the contribution of the lipid membrane environment to UPR activation.
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Affiliation(s)
- Paulina Kettel
- Max Perutz Laboratories Vienna, Vienna BioCenter, Vienna, Austria; Vienna BioCenter PhD Program, Doctoral School of the University of Vienna and Medical University of Vienna, Vienna, Austria
| | - G Elif Karagöz
- Max Perutz Laboratories Vienna, Vienna BioCenter, Vienna, Austria; Medical University of Vienna, Vienna, Austria.
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19
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Zhu W, Zhang H, Niu T, Liu K, Fareeduddin Mohammed Farooqui H, Sun R, Chen X, Yuan Y, Wang S. Microglial SCAP deficiency protects against diabetes-associated cognitive impairment through inhibiting NLRP3 inflammasome-mediated neuroinflammation. Brain Behav Immun 2024; 119:154-170. [PMID: 38570101 DOI: 10.1016/j.bbi.2024.03.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 03/25/2024] [Accepted: 03/30/2024] [Indexed: 04/05/2024] Open
Abstract
Hyperglycemia-induced pathological microglial responses and subsequent neuronal damage are notable characteristics of diabetes-associated cognitive impairment (DACI). Cholesterol accumulation in the brain is a prevalent consequence of diabetes mellitus (DM), exacerbating pathological microglial responses. Regarding disordered glucose and lipid metabolism, the Sterol Regulatory Element-Binding Protein (SREBP) cleavage-activating protein (SCAP), a cholesterol sensor, exhibits increased expression and abnormal translocation from the endoplasmic reticulum to the Golgi, amplifying the inflammatory response. Therefore, we hypothesized that overexpression of microglia-SCAP and cholesterol accumulation in DM mice could induce pathological microglial responses associated with DACI. Our type 2 DM mice model presented an abnormal increase in microglial SCAP expression. The functional loss of microglia-specific SCAP in DM mice improved cognitive impairment, neuronal synaptic plasticity deficits, and abnormal microglial responses. Mechanistically, the accumulated SCAP directly bound to and enhanced the activation of the microglial-specific inflammatory amplifier, NLRP3 inflammasome, in Golgi, thereby increasing pathological microglial responses and promoting neuronal damage. These findings indicate an important regulatory axis of microglial responses from SCAP to the NLRP3 inflammasome pathway in microglia. These underscore the crosstalk between cholesterol disorders and pathological microglial responses, offering a promising avenue for pharmaceutical interventions in DACI.
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Affiliation(s)
- Wenwen Zhu
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China; School of Medicine, Southeast University, Nanjing 210009, China
| | - Haoqiang Zhang
- Department of Endocrinology, Center for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China
| | - Tong Niu
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China; School of Medicine, Southeast University, Nanjing 210009, China
| | - Kunyu Liu
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China; School of Medicine, Southeast University, Nanjing 210009, China
| | - Huzaifa Fareeduddin Mohammed Farooqui
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China; School of Medicine, Southeast University, Nanjing 210009, China
| | - Ruoyu Sun
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China; School of Medicine, Southeast University, Nanjing 210009, China
| | - Xiu Chen
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China; School of Medicine, Southeast University, Nanjing 210009, China
| | - Yang Yuan
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China.
| | - Shaohua Wang
- Department of Endocrinology, Affiliated Zhongda Hospital of Southeast University, Nanjing 210009, China.
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20
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Lee J, Mani A, Shin MJ, Krauss RM. Leveraging altered lipid metabolism in treating B cell malignancies. Prog Lipid Res 2024; 95:101288. [PMID: 38964473 PMCID: PMC11347096 DOI: 10.1016/j.plipres.2024.101288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 06/12/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024]
Abstract
B cell malignancies, comprising over 80 heterogeneous blood cancers, pose significant prognostic challenges due to intricate oncogenic signaling. Emerging evidence emphasizes the pivotal role of disrupted lipid metabolism in the development of these malignancies. Variations in lipid species, such as phospholipids, cholesterol, sphingolipids, and fatty acids, are widespread across B cell malignancies, contributing to uncontrolled cell proliferation and survival. Phospholipids play a crucial role in initial signaling cascades leading to B cell activation and malignant transformation through constitutive B cell receptor (BCR) signaling. Dysregulated cholesterol and sphingolipid homeostasis support lipid raft integrity, crucial for propagating oncogenic signals. Sphingolipids impact malignant B cell stemness, proliferation, and survival, while glycosphingolipids in lipid rafts modulate BCR activation. Additionally, cancer cells enhance fatty acid-related processes to meet heightened metabolic demands. In obese individuals, the obesity-derived lipids and adipokines surrounding adipocytes rewire lipid metabolism in malignant B cells, evading cytotoxic therapies. Genetic drivers such as MYC translocations also intrinsically alter lipid metabolism in malignant B cells. In summary, intrinsic and extrinsic factors converge to reprogram lipid metabolism, fostering aggressive phenotypes in B cell malignancies. Therefore, targeting altered lipid metabolism has translational potential for improving risk stratification and clinical management of diverse B cell malignancy subtypes.
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Affiliation(s)
- Jaewoong Lee
- School of Biosystems and Biomedical Sciences, College of Health Science, Korea University, Seoul 02841, Republic of Korea; Department of Integrated Biomedical and Life Science, Korea University, Seoul 02841, Republic of Korea; Interdisciplinary Program in Precision Public Health, Korea University, Seoul 02841, Republic of Korea; Center of Molecular and Cellular Oncology, Yale University, New Haven, CT 06511, USA.
| | - Arya Mani
- Department of Internal Medicine, Section of Cardiovascular Medicine, Yale University, New Haven, CT 06511, USA; Department of Genetics, Yale University, New Haven, CT 06511, USA
| | - Min-Jeong Shin
- School of Biosystems and Biomedical Sciences, College of Health Science, Korea University, Seoul 02841, Republic of Korea; Department of Integrated Biomedical and Life Science, Korea University, Seoul 02841, Republic of Korea; Interdisciplinary Program in Precision Public Health, Korea University, Seoul 02841, Republic of Korea
| | - Ronald M Krauss
- Department of Pediatrics and Medicine, University of California San Francisco, San Francisco, CA 94143, USA.
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21
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Locke B, Campbell E, Lu R. CREB3 mediates the transcriptional regulation of PGC-1α, a master regulator of energy homeostasis and mitochondrial biogenesis. FEBS Lett 2024; 598:1730-1739. [PMID: 38697949 DOI: 10.1002/1873-3468.14897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 05/05/2024]
Abstract
Lipid metabolism hinges on a balance between lipogenesis and fatty acid oxidation (FAO). Disruptions in this balance can induce endoplasmic reticulum (ER) stress triggering the unfolded protein response (UPR) and contribute to metabolic diseases. The UPR protein, Luman or CREB3, has recently been implicated in metabolic regulation-CREB3 knockout mice exhibit resistance to diet-induced obesity and altered insulin sensitivity. Here, we show that CREB3 activated PPARGC1A transcription from a 1 kb promoter region. An increase in CREB3 expression correlated inversely with endogenous PPARGC1A mRNA levels and genes involved in FAO. As PGC-1α encoded by PPARGC1A is a master regulator of mitochondrial biogenesis and energy homeostasis, these findings demonstrate that CREB3 is a transcriptional regulator of PGC-1α, underlining the potential role of CREB3 in energy metabolism.
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Affiliation(s)
- Briana Locke
- Department of Molecular and Cellular Biology, University of Guelph, Canada
| | - Elena Campbell
- Department of Molecular and Cellular Biology, University of Guelph, Canada
| | - Ray Lu
- Department of Molecular and Cellular Biology, University of Guelph, Canada
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22
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Ge X, Slütter B, Lambooij JM, Zhou E, Ying Z, Agirman C, Heijink M, Rimbert A, Guigas B, Kuiper J, Müller C, Bracher F, Giera M, Kooijman S, Rensen PC, Wang Y, Schönke M. DHCR24 inhibitor SH42 increases desmosterol without preventing atherosclerosis development in mice. iScience 2024; 27:109830. [PMID: 38770137 PMCID: PMC11103367 DOI: 10.1016/j.isci.2024.109830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 02/29/2024] [Accepted: 04/24/2024] [Indexed: 05/22/2024] Open
Abstract
The liver X receptor (LXR) is considered a therapeutic target for atherosclerosis treatment, but synthetic LXR agonists generally also cause hepatic steatosis and hypertriglyceridemia. Desmosterol, a final intermediate in cholesterol biosynthesis, has been identified as a selective LXR ligand that suppresses inflammation without inducing lipogenesis. Δ24-Dehydrocholesterol reductase (DHCR24) converts desmosterol into cholesterol, and we previously showed that the DHCR24 inhibitor SH42 increases desmosterol to activate LXR and attenuate experimental peritonitis and metabolic dysfunction-associated steatotic liver disease. Here, we aimed to evaluate the effect of SH42 on atherosclerosis development in APOE∗3-Leiden.CETP mice and low-density lipoproteins (LDL) receptor knockout mice, models for lipid- and inflammation-driven atherosclerosis, respectively. In both models, SH42 increased desmosterol without affecting plasma lipids. While reducing liver lipids in APOE∗3-Leiden.CETP mice, and regulating populations of circulating monocytes in LDL receptor knockout mice, SH42 did not attenuate atherosclerosis in either model.
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Affiliation(s)
- Xiaoke Ge
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Bram Slütter
- Div. of BioTherapeutics, Leiden Academic Center for Drug Research, Leiden University, Leiden 2333 AL, the Netherlands
| | - Joost M. Lambooij
- Department of Parasitology, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Enchen Zhou
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Zhixiong Ying
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Ceren Agirman
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Marieke Heijink
- The Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Antoine Rimbert
- Nantes Université, CNRS, INSERM, l’institut du thorax, F-44000 Nantes, France
| | - Bruno Guigas
- Department of Parasitology, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Johan Kuiper
- Div. of BioTherapeutics, Leiden Academic Center for Drug Research, Leiden University, Leiden 2333 AL, the Netherlands
| | - Christoph Müller
- Department of Pharmacy, Center for Drug Research, Ludwig Maximilians Universität München, 80539 Munich, Germany
| | - Franz Bracher
- Department of Pharmacy, Center for Drug Research, Ludwig Maximilians Universität München, 80539 Munich, Germany
| | - Martin Giera
- The Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Sander Kooijman
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Patrick C.N. Rensen
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
| | - Yanan Wang
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
- Med-X institute, Center for Immunological and Metabolic Diseases, and Department of Endocrinology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an Jiaotong University, Xi’an 710061, China
| | - Milena Schönke
- Department of Medicine, Div. of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden 2333 ZA, the Netherlands
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23
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Wang Y, Liu Q, Liu Y, Qiao W, Zhao J, Cao H, Liu Y, Chen L. Advances in the composition, efficacy, and mimicking of human milk phospholipids. Food Funct 2024; 15:6254-6273. [PMID: 38787648 DOI: 10.1039/d4fo00539b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
Phospholipids are the essential components of human milk, contributing to the enhancement of cognitive development, regulation of immune functions, and mitigation of elevated cholesterol levels. Infant formulas supplemented with phospholipids can change the composition, content, and globule membrane structure of milk lipids, improving their digestive properties and nutritional value. However, mimicking phospholipids in infant formulas is currently limited, and the supplemented standards of phospholipid species and amounts in infant formulas are unknown. Consequently, there is a significant difference between the phospholipids in infant formulas and those in human milk. This article reviews the recent progress in human milk phospholipid research, aiming to describe the composition, content, and positive effects of human milk phospholipids, as well as summarises the dietary sources of phospholipid supplementation and the current state of human milk phospholipid mimicking in infant formulas. This review provides clear directions for research on mimicking human milk phospholipids and evaluating the nutritional functions of phospholipids in infants.
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Affiliation(s)
- Yuru Wang
- Key Laboratory of Dairy Science, Ministry of Education, Food Science College, Northeast Agricultural University, Harbin, 150030, China.
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
| | - Qian Liu
- Key Laboratory of Dairy Science, Ministry of Education, Food Science College, Northeast Agricultural University, Harbin, 150030, China.
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
| | - Yan Liu
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
| | - Weicang Qiao
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
| | - Junying Zhao
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
| | - Huiru Cao
- Key Laboratory of Dairy Science, Ministry of Education, Food Science College, Northeast Agricultural University, Harbin, 150030, China.
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
| | - Yan Liu
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
| | - Lijun Chen
- Key Laboratory of Dairy Science, Ministry of Education, Food Science College, Northeast Agricultural University, Harbin, 150030, China.
- National Engineering Research Center of Dairy Health for Maternal and Child, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Engineering Research Center of Dairy, Beijing Technical Innovation Center of Human Milk Research, Beijing Sanyuan Foods Co. Ltd, Beijing 100163, China
- Beijing Sanyuan Foods Co. Ltd., No. 8, Yingchang Street 100076, Yinghai Town, Daxing District, Beijing, China.
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24
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Mao TH, Huang HQ, Zhang CH. Clinical characteristics and treatment compounds of obesity-related kidney injury. World J Diabetes 2024; 15:1091-1110. [PMID: 38983811 PMCID: PMC11229974 DOI: 10.4239/wjd.v15.i6.1091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/22/2023] [Accepted: 04/08/2024] [Indexed: 06/11/2024] Open
Abstract
Disorders in energy homeostasis can lead to various metabolic diseases, particularly obesity. The obesity epidemic has led to an increased incidence of obesity-related nephropathy (ORN), a distinct entity characterized by proteinuria, glomerulomegaly, progressive glomerulosclerosis, and renal function decline. Obesity and its associated renal damage are common in clinical practice, and their incidence is increasing and attracting great attention. There is a great need to identify safe and effective therapeutic modalities, and therapeutics using chemical compounds and natural products are receiving increasing attention. However, the summary is lacking about the specific effects and mechanisms of action of compounds in the treatment of ORN. In this review, we summarize the important clinical features and compound treatment strategies for obesity and obesity-induced kidney injury. We also summarize the pathologic and clinical features of ORN as well as its pathogenesis and potential therapeutics targeting renal inflammation, oxidative stress, insulin resistance, fibrosis, kidney lipid accumulation, and dysregulated autophagy. In addition, detailed information on natural and synthetic compounds used for the treatment of obesity-related kidney disease is summarized. The synthesis of detailed information aims to contribute to a deeper understanding of the clinical treatment modalities for obesity-related kidney diseases, fostering the anticipation of novel insights in this domain.
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Affiliation(s)
- Tuo-Hua Mao
- Department of Endocrinology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, China
| | - Han-Qi Huang
- Department of Endocrinology, Hubei No. 3 People’s Hospital of Jianghan University, Wuhan 430033, Hubei Province, China
| | - Chuan-Hai Zhang
- Department of Physiology, UT Southwestern Medical Center, Dallas, TX 75390, United States
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25
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Benatzy Y, Palmer MA, Lütjohann D, Ohno RI, Kampschulte N, Schebb NH, Fuhrmann DC, Snodgrass RG, Brüne B. ALOX15B controls macrophage cholesterol homeostasis via lipid peroxidation, ERK1/2 and SREBP2. Redox Biol 2024; 72:103149. [PMID: 38581859 PMCID: PMC11002893 DOI: 10.1016/j.redox.2024.103149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 04/02/2024] [Indexed: 04/08/2024] Open
Abstract
Macrophage cholesterol homeostasis is crucial for health and disease and has been linked to the lipid-peroxidizing enzyme arachidonate 15-lipoxygenase type B (ALOX15B), albeit molecular mechanisms remain obscure. We performed global transcriptome and immunofluorescence analysis in ALOX15B-silenced primary human macrophages and observed a reduction of nuclear sterol regulatory element-binding protein (SREBP) 2, the master transcription factor of cellular cholesterol biosynthesis. Consequently, SREBP2-target gene expression was reduced as were the sterol biosynthetic intermediates desmosterol and lathosterol as well as 25- and 27-hydroxycholesterol. Mechanistically, suppression of ALOX15B reduced lipid peroxidation in primary human macrophages and thereby attenuated activation of mitogen-activated protein kinase ERK1/2, which lowered SREBP2 abundance and activity. Low nuclear SREBP2 rendered both, ALOX15B-silenced and ERK1/2-inhibited macrophages refractory to SREBP2 activation upon blocking the NPC intracellular cholesterol transporter 1. These studies suggest a regulatory mechanism controlling macrophage cholesterol homeostasis based on ALOX15B-mediated lipid peroxidation and concomitant ERK1/2 activation.
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Affiliation(s)
- Yvonne Benatzy
- Faculty of Medicine, Institute of Biochemistry I, Goethe University Frankfurt, Frankfurt, Germany
| | - Megan A Palmer
- Faculty of Medicine, Institute of Biochemistry I, Goethe University Frankfurt, Frankfurt, Germany
| | - Dieter Lütjohann
- Institute for Clinical Chemistry and Clinical Pharmacology, University of Bonn, Bonn, Germany
| | - Rei-Ichi Ohno
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Nadja Kampschulte
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Nils Helge Schebb
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Dominik C Fuhrmann
- Faculty of Medicine, Institute of Biochemistry I, Goethe University Frankfurt, Frankfurt, Germany.
| | - Ryan G Snodgrass
- Faculty of Medicine, Institute of Biochemistry I, Goethe University Frankfurt, Frankfurt, Germany; Western Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Davis, CA, USA.
| | - Bernhard Brüne
- Faculty of Medicine, Institute of Biochemistry I, Goethe University Frankfurt, Frankfurt, Germany; Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Frankfurt, Germany; German Cancer Consortium (DKTK), Partner Site Frankfurt, Germany.
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26
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Shi Y, Wang S, Wang K, Yang R, Liu D, Liao H, Qi Y, Qiu K, Hu Y, Wen H, Xu K. Relieving Macrophage Dysfunction by Inhibiting SREBP2 Activity: A Hypoxic Mesenchymal Stem Cells-Derived Exosomes Loaded Multifunctional Hydrogel for Accelerated Diabetic Wound Healing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309276. [PMID: 38247194 DOI: 10.1002/smll.202309276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/18/2023] [Indexed: 01/23/2024]
Abstract
Macrophage dysfunction is one of the primary factors leading to the delayed healing of diabetic wounds. Hypoxic bone marrow mesenchymal stem cells-derived exosomes (hyBMSC-Exos) have been shown to play an active role in regulating cellular function through the carried microRNAs. However, the administration of hyBMSC-Exos alone in diabetic wounds usually brings little effect, because the exosomes are inherently unstable and have a short retention time at the wounds. In this study, a multifunctional hydrogel based on gallic acid (GA) conjugated chitosan (Chi-GA) and partially oxidized hyaluronic acid (OHA) is prepared for sustained release of hyBMSC-Exos. The hydrogel not only exhibits needs-satisfying physicochemical properties, but also displays outstanding biological performances such as low hemolysis rate, strong antibacterial capacity, great antioxidant ability, and excellent biocompatibility. It has the ability to boost the stability of hyBMSC-Exos, leading to a continuous and gradual release of the exosomes at wound locations, ultimately enhancing the exosomes' uptake efficiency by target cells. Most importantly, hyBMSC-Exos loaded hydrogel shows an excellent ability to promote diabetic wound healing by regulating macrophage polarization toward M2 phenotype. This may be because exosomal miR-4645-5p and antioxidant property of the hydrogel synergistically inhibit SREBP2 activity in macrophages. This study presents a productive approach for managing diabetic wounds.
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Affiliation(s)
- Yan Shi
- Department of Plastic, Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, 330006, P. R. China
| | - Shang Wang
- Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Cure of Metabolic Diseases, College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China
| | - Kai Wang
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China
| | - Ronghua Yang
- Department of Burn and Plastic Surgery, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, 510650, P. R. China
| | - Dewu Liu
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, P. R. China
| | - Huaiwei Liao
- Department of Plastic, Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, 330006, P. R. China
| | - Yuhan Qi
- Department of Plastic, Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, 330006, P. R. China
| | - Keqing Qiu
- Dermatological Department, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, P. R. China
| | - Yanghong Hu
- Jiangxi University of Chinese Medicine, Nanchang, Jiangxi, 330006, P. R. China
| | - Huicai Wen
- Department of Plastic, Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, 330006, P. R. China
| | - Kui Xu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China
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27
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Su F, Koeberle A. Regulation and targeting of SREBP-1 in hepatocellular carcinoma. Cancer Metastasis Rev 2024; 43:673-708. [PMID: 38036934 PMCID: PMC11156753 DOI: 10.1007/s10555-023-10156-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/10/2023] [Indexed: 12/02/2023]
Abstract
Hepatocellular carcinoma (HCC) is an increasing burden on global public health and is associated with enhanced lipogenesis, fatty acid uptake, and lipid metabolic reprogramming. De novo lipogenesis is under the control of the transcription factor sterol regulatory element-binding protein 1 (SREBP-1) and essentially contributes to HCC progression. Here, we summarize the current knowledge on the regulation of SREBP-1 isoforms in HCC based on cellular, animal, and clinical data. Specifically, we (i) address the overarching mechanisms for regulating SREBP-1 transcription, proteolytic processing, nuclear stability, and transactivation and (ii) critically discuss their impact on HCC, taking into account (iii) insights from pharmacological approaches. Emphasis is placed on cross-talk with the phosphatidylinositol-3-kinase (PI3K)-protein kinase B (Akt)-mechanistic target of rapamycin (mTOR) axis, AMP-activated protein kinase (AMPK), protein kinase A (PKA), and other kinases that directly phosphorylate SREBP-1; transcription factors, such as liver X receptor (LXR), peroxisome proliferator-activated receptors (PPARs), proliferator-activated receptor γ co-activator 1 (PGC-1), signal transducers and activators of transcription (STATs), and Myc; epigenetic mechanisms; post-translational modifications of SREBP-1; and SREBP-1-regulatory metabolites such as oxysterols and polyunsaturated fatty acids. By carefully scrutinizing the role of SREBP-1 in HCC development, progression, metastasis, and therapy resistance, we shed light on the potential of SREBP-1-targeting strategies in HCC prevention and treatment.
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Affiliation(s)
- Fengting Su
- Michael Popp Institute and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020, Innsbruck, Austria
| | - Andreas Koeberle
- Michael Popp Institute and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020, Innsbruck, Austria.
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28
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Chen M, Li H, Zheng S, Shen J, Chen Y, Li Y, Yuan M, Wu J, Sun Q. Nobiletin targets SREBP1/ACLY to induce autophagy-dependent cell death of gastric cancer cells through PI3K/Akt/mTOR signaling pathway. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 128:155360. [PMID: 38547624 DOI: 10.1016/j.phymed.2024.155360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/07/2023] [Accepted: 01/11/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND Autophagy could sense metabolic conditions and safeguard cells against nutrient deprivation, ultimately supporting the survival of cancer cells. Nobiletin (NOB) is a kind of bioactive component of the traditional Chinese medicine Citri Reticulatae Pericarpium and has been proven to induce GC cell death by reducing de novo fatty acid synthesis in our previous study. Nevertheless, the precise mechanisms by which NOB induces cell death in GC cells still need further elucidation. OBJECTIVES To examine the mechanism by which NOB inhibits gastric cancer progression through the regulation of autophagy under the condition of lipid metabolism inhibition. METHODS/ STUDY DESIGN Proliferation was detected by the CCK-8 assay. RNA sequencing (RNA-seq) was used to examine signaling pathway changes. Electron microscopy and mRFP-GFP-LC3 lentiviral transfection were performed to observe autophagy in vitro. Western blot, plasmid transfection, immunofluorescence staining, and CUT & Tag-qPCR techniques were utilized to explore the mechanisms by which NOB affects GC cells. Molecular docking and molecular dynamics simulations were conducted to predict the binding mode of NOB and SREBP1. CETSA was adopted to verify the predicted of binding model. A patient-derived xenograft (PDX) model was employed to verify the therapeutic efficacy of NOB in vivo. RESULTS We conducted functional studies and discovered that NOB inhibited the protective effect of autophagy via the PI3K/Akt/mTOR axis in GC cells. Based on previous research, we found that the overexpression of ACLY abrogated the NOB-induced autophagy-dependent cell death. In silico analysis predicted the formation of a stable complex between NOB and SREBP1. In vitro assays confirmed that NOB treatment increased the thermal stability of SREBP1 at the same temperature conditions. Moreover, CUT&TAG-qPCR analysis revealed that NOB could inhibit SREBP1 binding to the ACLY promoter. In the PDX model, NOB suppressed tumor growth, causing SREBP1 nuclear translocation inhibition, PI3K/Akt/mTOR inactivation, and autophagy-dependent cell death. CONCLUSION NOB demonstrated the ability to directly bind to SREBP1, inhibiting its nuclear translocation and binding to the ACLY promoter, thereby inducing autophagy-dependent cell death via PI3K/Akt/mTOR pathway.
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Affiliation(s)
- Menglin Chen
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China; No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Huaizhi Li
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China; No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Shanshan Zheng
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China; No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Junyu Shen
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China; No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Yuxuan Chen
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China; No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Yaqi Li
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China; No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Mengyun Yuan
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China; No.1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Jian Wu
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China.
| | - Qingmin Sun
- Jiangsu Province Key Laboratory of Tumor Systems Biology and Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China.
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Guercia E, Berti F, De Zorzi R, Navarini L, Geremia S, Medagli B, De Conto M, Cassetta A, Forzato C. On the Cholesterol Raising Effect of Coffee Diterpenes Cafestol and 16- O-Methylcafestol: Interaction with Farnesoid X Receptor. Int J Mol Sci 2024; 25:6096. [PMID: 38892285 PMCID: PMC11173301 DOI: 10.3390/ijms25116096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 05/24/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
The diterpene cafestol represents the most potent cholesterol-elevating compound known in the human diet, being responsible for more than 80% of the effect of coffee on serum lipids, with a mechanism still not fully clarified. In the present study, the interaction of cafestol and 16-O-methylcafestol with the stabilized ligand-binding domain (LBD) of the Farnesoid X Receptor was evaluated by fluorescence and circular dichroism. Fluorescence quenching was observed with both cafestol and 16-O-methylcafestol due to an interaction occurring in the close environment of the tryptophan W454 residue of the protein, as confirmed by docking and molecular dynamics. A conformational change of the protein was also observed by circular dichroism, particularly for cafestol. These results provide evidence at the molecular level of the interactions of FXR with the coffee diterpenes, confirming that cafestol can act as an agonist of FXR, causing an enhancement of the cholesterol level in blood serum.
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Affiliation(s)
- Elena Guercia
- Aromalab, illycaffè S.p.A., Area Science Park, Località Padriciano 99, 34149 Trieste, Italy; (E.G.); (L.N.)
| | - Federico Berti
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy; (F.B.); (S.G.); (B.M.); (M.D.C.)
| | - Rita De Zorzi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy; (F.B.); (S.G.); (B.M.); (M.D.C.)
| | - Luciano Navarini
- Aromalab, illycaffè S.p.A., Area Science Park, Località Padriciano 99, 34149 Trieste, Italy; (E.G.); (L.N.)
| | - Silvano Geremia
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy; (F.B.); (S.G.); (B.M.); (M.D.C.)
| | - Barbara Medagli
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy; (F.B.); (S.G.); (B.M.); (M.D.C.)
| | - Marco De Conto
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy; (F.B.); (S.G.); (B.M.); (M.D.C.)
| | - Alberto Cassetta
- CNR-Institute of Crystallography, Area Science Park, SS. 14, Km 163.5, Basovizza, 34149 Trieste, Italy;
| | - Cristina Forzato
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy; (F.B.); (S.G.); (B.M.); (M.D.C.)
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Göbel A, Pählig S, Motz A, Breining D, Traikov S, Hofbauer LC, Rachner TD. Overcoming statin resistance in prostate cancer cells by targeting the 3-hydroxy-3-methylglutaryl-CoA-reductase. Biochem Biophys Res Commun 2024; 710:149841. [PMID: 38588613 DOI: 10.1016/j.bbrc.2024.149841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/14/2024] [Accepted: 03/26/2024] [Indexed: 04/10/2024]
Abstract
Prostate cancer is the most prevalent malignancy in men. While diagnostic and therapeutic interventions have substantially improved in recent years, disease relapse, treatment resistance, and metastasis remain significant contributors to prostate cancer-related mortality. Therefore, novel therapeutic approaches are needed. Statins are inhibitors of the 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR), the rate-limiting enzyme of the mevalonate pathway which plays an essential role in cholesterol homeostasis. Numerous preclinical studies have provided evidence for the pleiotropic antitumor effects of statins. However, results from clinical studies remain controversial and have shown substantial benefits to even no effects on human malignancies including prostate cancer. Potential statin resistance mechanisms of tumor cells may account for such discrepancies. In our study, we treated human prostate cancer cell lines (PC3, C4-2B, DU-145, LNCaP) with simvastatin, atorvastatin, and rosuvastatin. PC3 cells demonstrated high statin sensitivity, resulting in a significant loss of vitality and clonogenic potential (up to - 70%; p < 0.001) along with an activation of caspases (up to 4-fold; p < 0.001). In contrast, C4-2B and DU-145 cells were statin-resistant. Statin treatment induced a restorative feedback in statin-resistant C4-2B and DU-145 cells through upregulation of the HMGCR gene and protein expression (up to 3-folds; p < 0.01) and its transcription factor sterol-regulatory element binding protein 2 (SREBP-2). This feedback was absent in PC3 cells. Blocking the feedback using HMGCR-specific small-interfering (si)RNA, the SREBP-2 activation inhibitor dipyridamole or the HMGCR degrader SR12813 abolished statin resistance in C4-2B and DU-145 and induced significant activation of caspases by statin treatment (up to 10-fold; p < 0.001). Consistently, long-term treatment with sublethal concentrations of simvastatin established a stable statin resistance of a PC3SIM subclone accompanied by a significant upregulation of both baseline as well as post-statin HMGCR protein (gene expression up to 70-fold; p < 0.001). Importantly, the statin-resistant phenotype of PC3SIM cells was reversible by HMGCR-specific siRNA and dipyridamole. Our investigations reveal a key role of a restorative feedback driven by the HMGCR/SREBP-2 axis in statin resistance mechanisms of prostate cancer cells.
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Affiliation(s)
- Andy Göbel
- Mildred Scheel Early Career Center, Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany.
| | - Sophie Pählig
- Mildred Scheel Early Career Center, Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Anja Motz
- Mildred Scheel Early Career Center, Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany
| | - Dorit Breining
- Mildred Scheel Early Career Center, Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany
| | - Sofia Traikov
- Max Planck Institute for Molecular Cell Biology and Genetics, Dresden, Germany
| | - Lorenz C Hofbauer
- Mildred Scheel Early Career Center, Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Tilman D Rachner
- Mildred Scheel Early Career Center, Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
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31
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Sharrouf K, Schlosser C, Mildenberger S, Fluhrer R, Hoeppner S. In vitro cleavage of tumor necrosis factor α (TNFα) by Signal-Peptide-Peptidase-like 2b (SPPL2b) resembles mechanistic principles observed in the cellular context. Chem Biol Interact 2024; 395:111006. [PMID: 38636792 DOI: 10.1016/j.cbi.2024.111006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/27/2024] [Accepted: 04/14/2024] [Indexed: 04/20/2024]
Abstract
Members of the Signal Peptide-Peptidase (SPP) and Signal Peptide-Peptidase-like (SPPL) family are intramembrane aspartyl-proteases like their well-studied homologs, the presenilins, which comprise the catalytically active subunit within the γ-secretase complex. The lack of in vitro cleavage assays for SPPL proteases limited their biochemical characterization as well as substrate identification and validation. So far, SPPL proteases have been analyzed exclusively in intact cells or membranes, restricting mechanistic analysis to co-expression of enzyme and substrate variants colocalizing in the same subcellular compartments. We describe the details of developing an in vitro cleavage assay for SPPL2b and its model substrate TNFα and analyzed the influence of phospholipids, detergent supplements, and cholesterol on the SPPL2b in vitro activity. SPPL2b in vitro activity resembles mechanistic principles that have been observed in a cellular context, such as cleavage sites and consecutive turnover of the TNFα transmembrane domain. The novel in vitro cleavage assay is functional with separately isolated protease and substrate and amenable to a high throughput plate-based readout overcoming previous limitations and providing the basis for studying enzyme kinetics, catalytic activity, substrate recognition, and the characteristics of small molecule inhibitors. As a proof of concept, we present the first biochemical in vitro characterization of the SPPL2a and SPPL2b specific small molecule inhibitor SPL-707.
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Affiliation(s)
- Kinda Sharrouf
- Biochemistry and Molecular Biology, Institute of Theoretical Medicine, Faculty of Medicine, University of Augsburg, Universitätsstrasse 2, D-86159, Augsburg, Germany
| | - Christine Schlosser
- Biochemistry and Molecular Biology, Institute of Theoretical Medicine, Faculty of Medicine, University of Augsburg, Universitätsstrasse 2, D-86159, Augsburg, Germany
| | - Sandra Mildenberger
- Biochemistry and Molecular Biology, Institute of Theoretical Medicine, Faculty of Medicine, University of Augsburg, Universitätsstrasse 2, D-86159, Augsburg, Germany; Institut für Entwicklungsbiologie und Neurobiologie, Johannes Gutenberg-Universität Mainz, Hanns-Dieter-Hüsch-Weg 15, 55099, Mainz, Germany
| | - Regina Fluhrer
- Biochemistry and Molecular Biology, Institute of Theoretical Medicine, Faculty of Medicine, University of Augsburg, Universitätsstrasse 2, D-86159, Augsburg, Germany; University of Augsburg, Center for Interdisciplinary Health Research, 86135, Augsburg, Germany
| | - Sabine Hoeppner
- Biochemistry and Molecular Biology, Institute of Theoretical Medicine, Faculty of Medicine, University of Augsburg, Universitätsstrasse 2, D-86159, Augsburg, Germany.
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32
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Wang J, Cao Y, Shi D, Zhang Z, Li X, Chen C. Crucial Involvement of Heme Biosynthesis in Vegetative Growth, Development, Stress Response, and Fungicide Sensitivity of Fusarium graminearum. Int J Mol Sci 2024; 25:5268. [PMID: 38791308 PMCID: PMC11120706 DOI: 10.3390/ijms25105268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/07/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Heme biosynthesis is a highly conserved pathway from bacteria to higher animals. Heme, which serves as a prosthetic group for various enzymes involved in multiple biochemical processes, is essential in almost all species, making heme homeostasis vital for life. However, studies on the biological functions of heme in filamentous fungi are scarce. In this study, we investigated the role of heme in Fusarium graminearum. A mutant lacking the rate-limiting enzymes in heme synthesis, coproporphyrinogen III oxidase (Cpo) or ferrochelatase (Fc), was constructed using a homologous recombination strategy. The results showed that the absence of these enzymes was lethal to F. graminearum, but the growth defect could be rescued by the addition of hemin, so we carried out further studies with the help of hemin. The results demonstrated that heme was required for the activity of FgCyp51, and its absence increased the sensitivity to tebuconazole and led to the upregulation of FgCYP51 in F. graminearum. Additionally, heme plays an indispensable role in the life cycle of F. graminearum, which is essential for vegetative growth, conidiation, external stress response (especially oxidative stress), lipid accumulation, fatty acid β-oxidation, autophagy, and virulence.
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Affiliation(s)
| | | | | | | | | | - Changjun Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; (J.W.); (Y.C.); (D.S.); (Z.Z.); (X.L.)
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33
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Plebanek MP, Xue Y, Nguyen YV, DeVito NC, Wang X, Holtzhausen A, Beasley GM, Theivanthiran B, Hanks BA. A lactate-SREBP2 signaling axis drives tolerogenic dendritic cell maturation and promotes cancer progression. Sci Immunol 2024; 9:eadi4191. [PMID: 38728412 DOI: 10.1126/sciimmunol.adi4191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 04/12/2024] [Indexed: 05/12/2024]
Abstract
Conventional dendritic cells (DCs) are essential mediators of antitumor immunity. As a result, cancers have developed poorly understood mechanisms to render DCs dysfunctional within the tumor microenvironment (TME). After identification of CD63 as a specific surface marker, we demonstrate that mature regulatory DCs (mregDCs) migrate to tumor-draining lymph node tissues and suppress DC antigen cross-presentation in trans while promoting T helper 2 and regulatory T cell differentiation. Transcriptional and metabolic studies showed that mregDC functionality is dependent on the mevalonate biosynthetic pathway and its master transcription factor, SREBP2. We found that melanoma-derived lactate activates SREBP2 in tumor DCs and drives conventional DC transformation into mregDCs via homeostatic or tolerogenic maturation. DC-specific genetic silencing and pharmacologic inhibition of SREBP2 promoted antitumor CD8+ T cell activation and suppressed melanoma progression. CD63+ mregDCs were found to reside within the lymph nodes of several preclinical tumor models and in the sentinel lymph nodes of patients with melanoma. Collectively, this work suggests that a tumor lactate-stimulated SREBP2-dependent program promotes CD63+ mregDC development and function while serving as a promising therapeutic target for overcoming immune tolerance in the TME.
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Affiliation(s)
- Michael P Plebanek
- Department of Medicine, Division of Medical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA
| | - Yue Xue
- Department of Medicine, Division of Medical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA
| | - Y-Van Nguyen
- Department of Medicine, Division of Medical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA
| | - Nicholas C DeVito
- Department of Medicine, Division of Medical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA
| | - Xueying Wang
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27708, USA
| | - Alisha Holtzhausen
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Georgia M Beasley
- Department of Surgery, Division of Surgical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA
| | - Balamayooran Theivanthiran
- Department of Medicine, Division of Medical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA
| | - Brent A Hanks
- Department of Medicine, Division of Medical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27708, USA
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Liu X, Xin DE, Zhong X, Zhao C, Li Z, Zhang L, Dourson AJ, Lee L, Mishra S, Bayat AE, Nicholson E, Seibel WL, Yan B, Mason J, Turner BJ, Gonsalvez DG, Ong W, Chew SY, Ghosh B, Yoon SO, Xin M, He Z, Tchieu J, Wegner M, Nave KA, Franklin RJM, Dutta R, Trapp BD, Hu M, Smith MA, Jankowski MP, Barton SK, He X, Lu QR. Small-molecule-induced epigenetic rejuvenation promotes SREBP condensation and overcomes barriers to CNS myelin regeneration. Cell 2024; 187:2465-2484.e22. [PMID: 38701782 DOI: 10.1016/j.cell.2024.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 01/01/2024] [Accepted: 04/04/2024] [Indexed: 05/05/2024]
Abstract
Remyelination failure in diseases like multiple sclerosis (MS) was thought to involve suppressed maturation of oligodendrocyte precursors; however, oligodendrocytes are present in MS lesions yet lack myelin production. We found that oligodendrocytes in the lesions are epigenetically silenced. Developing a transgenic reporter labeling differentiated oligodendrocytes for phenotypic screening, we identified a small-molecule epigenetic-silencing-inhibitor (ESI1) that enhances myelin production and ensheathment. ESI1 promotes remyelination in animal models of demyelination and enables de novo myelinogenesis on regenerated CNS axons. ESI1 treatment lengthened myelin sheaths in human iPSC-derived organoids and augmented (re)myelination in aged mice while reversing age-related cognitive decline. Multi-omics revealed that ESI1 induces an active chromatin landscape that activates myelinogenic pathways and reprograms metabolism. Notably, ESI1 triggered nuclear condensate formation of master lipid-metabolic regulators SREBP1/2, concentrating transcriptional co-activators to drive lipid/cholesterol biosynthesis. Our study highlights the potential of targeting epigenetic silencing to enable CNS myelin regeneration in demyelinating diseases and aging.
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Affiliation(s)
- Xuezhao Liu
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Dazhuan Eric Xin
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Xiaowen Zhong
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio, 45229, USA
| | - Chuntao Zhao
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Zhidan Li
- Center for Translational Medicine, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Liguo Zhang
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Adam J Dourson
- Department of Anesthesia, Division of Pain Management, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Lindsay Lee
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic Foundation, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Shreya Mishra
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic Foundation, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Arman E Bayat
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Eva Nicholson
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - William L Seibel
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Bingfang Yan
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio, 45229, USA
| | - Joel Mason
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne 3052, Australia
| | - Bradley J Turner
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne 3052, Australia
| | - David G Gonsalvez
- Department of Anatomy and Developmental Biology, Monash University, Melbourne 3168, Australia
| | - William Ong
- School of Chemistry, Chemical Engineering, and Biotechnology Nanyang Technological University, Singapore 637459, Singapore
| | - Sing Yian Chew
- School of Chemistry, Chemical Engineering, and Biotechnology Nanyang Technological University, Singapore 637459, Singapore; Lee Kong Chian School of Medicine, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Balaram Ghosh
- Epigenetic Research Laboratory, Department of Pharmacy, Birla Institute of Technology and Science-Pilani Hyderabad Campus, Shamirpet, Hyderabad, India, 500078
| | - Sung Ok Yoon
- Department of Biological Chemistry and Pharmacology, Ohio State University, Columbus, Ohio
| | - Mei Xin
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Zhigang He
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, and Department of Neurology and Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Jason Tchieu
- Department of Pediatrics, Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Michael Wegner
- Institut für Biochemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Klaus-Armin Nave
- Department of Neurogenetics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Robin J M Franklin
- Altos Labs, Cambridge Institute of Science, Granta Park, Cambridge CB21 6GP, UK
| | - Ranjan Dutta
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Case Western Reserve University School of Medicine, Cleveland, OH 44195, USA
| | - Bruce D Trapp
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Case Western Reserve University School of Medicine, Cleveland, OH 44195, USA
| | - Ming Hu
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic Foundation, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Matthew A Smith
- Department of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA; Rebecca D. Considine Research Institute, Akron Children's Hospital, Akron, OH, USA
| | - Michael P Jankowski
- Department of Anesthesia, Division of Pain Management, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Pediatric Pain Research Center, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Samantha K Barton
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne 3052, Australia
| | - Xuelian He
- Center for Translational Medicine, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P.R. China.
| | - Q Richard Lu
- Department of Pediatrics, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
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35
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Ma S, Ming Y, Wu J, Cui G. Cellular metabolism regulates the differentiation and function of T-cell subsets. Cell Mol Immunol 2024; 21:419-435. [PMID: 38565887 PMCID: PMC11061161 DOI: 10.1038/s41423-024-01148-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 02/23/2024] [Indexed: 04/04/2024] Open
Abstract
T cells are an important component of adaptive immunity and protect the host from infectious diseases and cancers. However, uncontrolled T cell immunity may cause autoimmune disorders. In both situations, antigen-specific T cells undergo clonal expansion upon the engagement and activation of antigens. Cellular metabolism is reprogrammed to meet the increase in bioenergetic and biosynthetic demands associated with effector T cell expansion. Metabolites not only serve as building blocks or energy sources to fuel cell growth and expansion but also regulate a broad spectrum of cellular signals that instruct the differentiation of multiple T cell subsets. The realm of immunometabolism research is undergoing swift advancements. Encapsulating all the recent progress within this concise review in not possible. Instead, our objective is to provide a succinct introduction to this swiftly progressing research, concentrating on the metabolic intricacies of three pivotal nutrient classes-lipids, glucose, and amino acids-in T cells. We shed light on recent investigations elucidating the roles of these three groups of metabolites in mediating the metabolic and immune functions of T cells. Moreover, we delve into the prospect of "editing" metabolic pathways within T cells using pharmacological or genetic approaches, with the aim of synergizing this approach with existing immunotherapies and enhancing the efficacy of antitumor and antiinfection immune responses.
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Affiliation(s)
- Sicong Ma
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China
| | - Yanan Ming
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China
| | - Jingxia Wu
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China.
| | - Guoliang Cui
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China.
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Zhang S, Fang T, He Y, Feng W, Yu Z, Zheng Y, Zhang C, Hu S, Liu Z, Liu J, Yu J, Zhang H, He A, Gong Y, He Z, Yang K, Xi Z, Yu W, Zhou L, Yao L, Yue S. VHL mutation drives human clear cell renal cell carcinoma progression through PI3K/AKT-dependent cholesteryl ester accumulation. EBioMedicine 2024; 103:105070. [PMID: 38564827 PMCID: PMC10999658 DOI: 10.1016/j.ebiom.2024.105070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 03/03/2024] [Accepted: 03/05/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Cholesteryl ester (CE) accumulation in intracellular lipid droplets (LDs) is an essential signature of clear cell renal cell carcinoma (ccRCC), but its molecular mechanism and pathological significance remain elusive. METHODS Enabled by the label-free Raman spectromicroscopy, which integrated stimulated Raman scattering microscopy with confocal Raman spectroscopy on the same platform, we quantitatively analyzed LD distribution and composition at the single cell level in intact ccRCC cell and tissue specimens in situ without any processing or exogenous labeling. Since we found that commonly used ccRCC cell lines actually did not show the CE-rich signature, primary cancer cells were isolated from human tissues to retain the lipid signature of ccRCC with CE level as high as the original tissue, which offers a preferable cell model for the study of cholesterol metabolism in ccRCC. Moreover, we established a patient-derived xenograft (PDX) mouse model that retained the CE-rich phenotype of human ccRCC. FINDINGS Surprisingly, our results revealed that CE accumulation was induced by tumor suppressor VHL mutation, the most common mutation of ccRCC. Moreover, VHL mutation was found to promote CE accumulation by upregulating HIFα and subsequent PI3K/AKT/mTOR/SREBPs pathway. Inspiringly, inhibition of cholesterol esterification remarkably suppressed ccRCC aggressiveness in vitro and in vivo with negligible toxicity, through the reduced membrane cholesterol-mediated downregulations of integrin and MAPK signaling pathways. INTERPRETATION Collectively, our study improves current understanding of the role of CE accumulation in ccRCC and opens up new opportunities for treatment. FUNDING This work was supported by National Natural Science Foundation of China (No. U23B2046 and No. 62027824), National Key R&D Program of China (No. 2023YFC2415500), Fundamental Research Funds for the Central Universities (No. YWF-22-L-547), PKU-Baidu Fund (No. 2020BD033), Peking University First Hospital Scientific and Technological Achievement Transformation Incubation Guidance Fund (No. 2022CX02), and Beijing Municipal Health Commission (No. 2020-2Z-40713).
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Affiliation(s)
- Shuo Zhang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Institute of Medical Photonics, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Tinghe Fang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Institute of Medical Photonics, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Yexuan He
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Institute of Medical Photonics, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Weichen Feng
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Institute of Medical Photonics, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Zhuoyang Yu
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Yaoyao Zheng
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Chi Zhang
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Shuai Hu
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Zhuojun Liu
- School of Engineering Medicine, Beihang University, Beijing, 100191, China
| | - Jia Liu
- School of Engineering Medicine, Beihang University, Beijing, 100191, China
| | - Jian Yu
- School of Engineering Medicine, Beihang University, Beijing, 100191, China
| | - Han Zhang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Institute of Medical Photonics, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Anbang He
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Yanqing Gong
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Zhisong He
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Kaiwei Yang
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Zhijun Xi
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Wei Yu
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Liqun Zhou
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
| | - Lin Yao
- Department of Urology, Peking University First Hospital, Beijing, 100034, China.
| | - Shuhua Yue
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Institute of Medical Photonics, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China.
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Han YZ, Du BX, Zhu XY, Wang YZY, Zheng HJ, Liu WJ. Lipid metabolism disorder in diabetic kidney disease. Front Endocrinol (Lausanne) 2024; 15:1336402. [PMID: 38742197 PMCID: PMC11089115 DOI: 10.3389/fendo.2024.1336402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 04/09/2024] [Indexed: 05/16/2024] Open
Abstract
Diabetic kidney disease (DKD), a significant complication associated with diabetes mellitus, presents limited treatment options. The progression of DKD is marked by substantial lipid disturbances, including alterations in triglycerides, cholesterol, sphingolipids, phospholipids, lipid droplets, and bile acids (BAs). Altered lipid metabolism serves as a crucial pathogenic mechanism in DKD, potentially intertwined with cellular ferroptosis, lipophagy, lipid metabolism reprogramming, and immune modulation of gut microbiota (thus impacting the liver-kidney axis). The elucidation of these mechanisms opens new potential therapeutic pathways for DKD management. This research explores the link between lipid metabolism disruptions and DKD onset.
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Affiliation(s)
- Yi-Zhen Han
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Bo-Xuan Du
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Xing-Yu Zhu
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Yang-Zhi-Yuan Wang
- School of Acupuncture-Moxibustion and Tuina, Beijing University of Chinese Medicine, Beijing, China
| | - Hui-Juan Zheng
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Wei-Jing Liu
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
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Lingwood C. Is cholesterol both the lock and key to abnormal transmembrane signals in Autism Spectrum Disorder? Lipids Health Dis 2024; 23:114. [PMID: 38643132 PMCID: PMC11032007 DOI: 10.1186/s12944-024-02075-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 03/08/2024] [Indexed: 04/22/2024] Open
Abstract
Disturbances in cholesterol homeostasis have been associated with ASD. Lipid rafts are central in many transmembrane signaling pathways (including mTOR) and changes in raft cholesterol content affect their order function. Cholesterol levels are controlled by several mechanisms, including endoplasmic reticulum associated degradation (ERAD) of the rate limiting HMGCoA reductase. A new approach to increase cholesterol via temporary ERAD blockade using a benign bacterial toxin-derived competitor for the ERAD translocon is suggested.A new lock and key model for cholesterol/lipid raft dependent signaling is proposed in which the rafts provide both the afferent and efferent 'tumblers' across the membrane to allow 'lock and key' receptor transmembrane signals.
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Affiliation(s)
- Clifford Lingwood
- Division of Molecular Medicine, Research Institute, Peter Gilgan Centre for Research and Learning, Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada.
- Departments of Biochemistry and Laboratory Medicine & Pathobiology, University of Toronto, Ontario, M5S 1A8, Canada.
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Luo YX, Yang LL, Yao XQ. Gut microbiota-host lipid crosstalk in Alzheimer's disease: implications for disease progression and therapeutics. Mol Neurodegener 2024; 19:35. [PMID: 38627829 PMCID: PMC11020986 DOI: 10.1186/s13024-024-00720-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 03/18/2024] [Indexed: 04/19/2024] Open
Abstract
Trillions of intestinal bacteria in the human body undergo dynamic transformations in response to physiological and pathological changes. Alterations in their composition and metabolites collectively contribute to the progression of Alzheimer's disease. The role of gut microbiota in Alzheimer's disease is diverse and complex, evidence suggests lipid metabolism may be one of the potential pathways. However, the mechanisms that gut microbiota mediate lipid metabolism in Alzheimer's disease pathology remain unclear, necessitating further investigation for clarification. This review highlights the current understanding of how gut microbiota disrupts lipid metabolism and discusses the implications of these discoveries in guiding strategies for the prevention or treatment of Alzheimer's disease based on existing data.
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Affiliation(s)
- Ya-Xi Luo
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Ling-Ling Yang
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiu-Qing Yao
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.
- Chongqing Municipality Clinical Research Center for Geriatric Medicine, Chongqing, China.
- Department of Rehabilitation Therapy, Chongqing Medical University, Chongqing, China.
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40
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Chou JC, Liu CC, Lee MF. Apigenin Suppresses MED28-Mediated Cell Growth in Human Liver Cancer Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38619972 DOI: 10.1021/acs.jafc.3c09276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Flavonoids exhibit health-promoting benefits against multiple chronic diseases, including cancer. Apigenin (4',5,7-trihydroxyflavone), one flavonoid present in fruits and vegetables, is potentially applicable to chemoprevention. Despite considerable progress in the therapeutic regimen of liver cancer, its prognosis remains poor. MED28, a Mediator subunit for transcriptional activation, is implicated in the development of several types of malignancy; however, its role in liver cancer is unknown at present. In liver cancer, the AKT/mammalian target of rapamycin (mTOR) is one major pathway involved in the oncogenic process. The aim of this study is to investigate the role of apigenin and MED28 in AKT/mTOR signaling in liver cancer. We first identified a connectivity score of 92.77 between apigenin treatment and MED28 knockdown in several cancer cell lines using CLUE, a cloud-based software platform to assess connectivity among compounds and genetic perturbagens. Higher expression of MED28 predicted a poorer survival prognosis; MED28 expression in liver cancer tissue was significantly higher than that of normal tissue, and it was positively correlated with tumor stage and grade in The Cancer Genome Atlas Liver Cancer (TCGA-LIHC) data set. Knockdown of MED28 induced cell cycle arrest and suppressed the AKT/mTOR signaling in two human liver cancer cell lines, HepG2 and Huh 7, accompanied by less lipid accumulation and lower expression and nuclear localization of sterol regulatory element binding protein 1 (SREBP1). Apigenin inhibited the expression of MED28, and the effect of apigenin mimicked that of the MED28 knockdown. On the other hand, the AKT/mTOR signaling was upregulated when MED28 was overexpressed. These data indicated that MED28 was associated with the survival prognosis and the progression of liver cancer by regulating AKT/mTOR signaling and apigenin appeared to inhibit cell growth through MED28-mediated mTOR signaling, which may be applicable as an adjuvant of chemotherapy or chemoprevention in liver cancer.
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Affiliation(s)
- Jou-Chia Chou
- Department of Nutrition, China Medical University, Taichung 406040, Taiwan
| | - Chen-Chia Liu
- Department of Nutrition, China Medical University, Taichung 406040, Taiwan
| | - Ming-Fen Lee
- Department of Nutrition, China Medical University, Taichung 406040, Taiwan
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Kim KA, Tran NKS, Baek J, Lee S, Kang KS, Kim KH. Proanthocyanidins and Phenolic Compounds from the Twigs of Salix chaenomeloides and Their Anti-Lipogenic Effects on 3T3-L1 Preadipocytes. Nutrients 2024; 16:1036. [PMID: 38613069 PMCID: PMC11013749 DOI: 10.3390/nu16071036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/07/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024] Open
Abstract
The present study investigated potential bioactive natural products from the EtOH extract of Salix chaenomeloides twigs using column chromatography, leading to the isolation of six compounds (1-6), which were characterized as two proanthocyanidins, procyanidin B2 (1) and procyanidin B1 (2), and four phenolic compounds, 4-hydroxybenzoic acid β-D-glucosyl ester (3), di-O-methylcrenatin (4), p-coumaric acid glucoside (5), and syringin (6) by the comparison of their NMR spectra with the reported data and high-resolution (HR)-electrospray ionization mass spectroscopy (ESI-MS) analysis. We investigated the potential of six compounds (1-6) to inhibit adipogenesis in 3T3-L1 preadipocytes, which showed that the compounds (1-6) significantly reduced lipid accumulation in 3T3-L1 adipocytes without affecting cell proliferation. Notably, compound 1 demonstrated a remarkable 60% and 90% reduction in lipid levels with 50 and 100 µM treatments, respectively. Oil Red O staining results indicated that compound 1 significantly inhibits the formation of lipid droplets, comparable to the effect of T863, an inhibitor of triglyceride used as a positive control, in adipocytes. Compound 1 had no effect on the regulators PPARγ, C/EBPα, and SREBF1 of adipocyte differentiation in 3T3-L1 preadipocytes, but compound 1 activated the fatty acid oxidation regulator, PPARα, compared to the lipogenic-induced control. It also suppressed fatty acid synthesis by downregulating the expression of fatty acid synthase (FAS). Finally, compound 1 induced the mRNA and protein levels of CPT1A, an initial marker of mitochondrial fatty acid oxidation in 3T3-L1. This finding substantiates the anti-lipogenic and lipolytic effects of procyanidin B2 (1) in 3T3-L1 preadipocytes, emphasizing its pivotal role in modulating obesity-related markers.
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Affiliation(s)
- Kyung Ah Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea; (K.A.K.); (J.B.); (S.L.)
| | | | - Jiwon Baek
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea; (K.A.K.); (J.B.); (S.L.)
| | - Soah Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea; (K.A.K.); (J.B.); (S.L.)
- Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Ki Sung Kang
- College of Korean Medicine, Gachon University, Seongnam 13120, Republic of Korea;
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea; (K.A.K.); (J.B.); (S.L.)
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42
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Sanchez L, Campos-Chillon F, Sargolzaei M, Peterson DG, Sprayberry KA, McArthur G, Anderson P, Golden B, Pokharel S, Abo-Ismail MK. Molecular Mechanisms Associated with the Development of the Metritis Complex in Dairy Cattle. Genes (Basel) 2024; 15:439. [PMID: 38674374 PMCID: PMC11049392 DOI: 10.3390/genes15040439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/21/2024] [Accepted: 03/28/2024] [Indexed: 04/28/2024] Open
Abstract
The metritis complex (MC), a group of post-partum uterine diseases, is associated with increased treatment costs and reduced milk yield and fertility. The goal of this study was to identify genetic variants, genes, or genomic regions that modulate MC disease. A genome-wide association study was performed using a single-locus mixed linear model of 1967 genotypes (624,460 SNPs) and metritis complex records. Then, in-silico functional analyses were performed to detect biological mechanisms and pathways associated with the development of MC. The ATP8A2, COX16, AMN, and TRAF3 genes, located on chromosomes 12, 10, and 21, were associated with MC at p ≤ 0.0001. These genes are involved in the regulation of cholesterol metabolism in the stromal tissue of the uterus, which can be directly associated with the mode of transmission for pathogens causing the metritis complex. The modulation of cholesterol abundance alters the efficiency of virulence factors and may affect the susceptibility of the host to infection. The SIPA1L1, DEPDC5, and RNF122 genes were also significantly associated with MC at p ≤ 0.0001 and are involved in the PI3k-Akt pathway, responsible for activating the autophagic processes. Thus, the dysregulation of these genes allows for unhindered bacterial invasion, replication, and survival within the endometrium.
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Affiliation(s)
- Leanna Sanchez
- Department of Animal Science, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; (L.S.); (F.C.-C.); (D.G.P.); (K.A.S.); (S.P.)
| | - Fernando Campos-Chillon
- Department of Animal Science, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; (L.S.); (F.C.-C.); (D.G.P.); (K.A.S.); (S.P.)
| | - Mehdi Sargolzaei
- Select Sires Inc., 11740 US-42, Plain City, OH 43064, USA;
- Center for Genetic Improvement of Livestock, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Daniel G. Peterson
- Department of Animal Science, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; (L.S.); (F.C.-C.); (D.G.P.); (K.A.S.); (S.P.)
| | - Kim A. Sprayberry
- Department of Animal Science, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; (L.S.); (F.C.-C.); (D.G.P.); (K.A.S.); (S.P.)
| | - Garry McArthur
- Swinging Udders Veterinary Services, 8418 Liberty Rd, Galt, CA 95632, USA;
| | - Paul Anderson
- Department of Computer Science and Software Engineering, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA;
| | | | - Siroj Pokharel
- Department of Animal Science, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; (L.S.); (F.C.-C.); (D.G.P.); (K.A.S.); (S.P.)
| | - Mohammed K. Abo-Ismail
- Department of Animal Science, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; (L.S.); (F.C.-C.); (D.G.P.); (K.A.S.); (S.P.)
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Rossi I, Marodin G, Lupo MG, Adorni MP, Papotti B, Dall’Acqua S, Ferri N. Gene Silencing of Angiopoietin-like 3 (ANGPTL3) Induced De Novo Lipogenesis and Lipid Accumulation in Huh7 Cell Line. Int J Mol Sci 2024; 25:3708. [PMID: 38612519 PMCID: PMC11011473 DOI: 10.3390/ijms25073708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/21/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024] Open
Abstract
Angiopoietin-like 3 (ANGPTL3) is a hepatokine acting as a negative regulator of lipoprotein lipase (LPL). Vupanorsen, an ANGPTL3 directed antisense oligonucleotide, showed an unexpected increase in liver fat content in humans. Here, we investigated the molecular mechanism linking ANGPTL3 silencing to hepatocyte fat accumulation. Human hepatocarcinoma Huh7 cells were treated with small interfering RNA (siRNA) directed to ANGPTL3, human recombinant ANGPTL3 (recANGPTL3), or their combination. Using Western blot, Oil Red-O, biochemical assays, and ELISA, we analyzed the expression of genes and proteins involved in lipid metabolism. Oil Red-O staining demonstrated that lipid content increased after 48 h of ANGPTL3 silencing (5.89 ± 0.33 fold), incubation with recANGPTL3 (4.08 ± 0.35 fold), or their combination (8.56 ± 0.18 fold), compared to untreated cells. This effect was also confirmed in Huh7-LX2 spheroids. A total of 48 h of ANGPTL3 silencing induced the expression of genes involved in the de novo lipogenesis, such as fatty acid synthase, stearoyl-CoA desaturase, ATP citrate lyase, and Acetyl-Coenzyme A Carboxylase 1 together with the proprotein convertase subtilisin/kexin 9 (PCSK9). Time-course experiments revealed that 6 h post transfection with ANGPTL3-siRNA, the cholesterol esterification by Acyl-coenzyme A cholesterol acyltransferase (ACAT) was reduced, as well as total cholesterol content, while an opposite effect was observed at 48 h. Under the same experimental conditions, no differences in secreted apoB and PCSK9 were observed. Since PCSK9 was altered by the treatment, we tested a possible co-regulation between the two genes. The effect of ANGPTL3-siRNA on the expression of genes involved in the de novo lipogenesis was not counteracted by gene silencing of PCSK9. In conclusion, our in vitro study suggests that ANGPTL3 silencing determines lipid accumulation in Huh7 cells by inducing the de novo lipogenesis independently from PCSK9.
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Affiliation(s)
- Ilaria Rossi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy; (I.R.); (G.M.); (S.D.)
| | - Giorgia Marodin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy; (I.R.); (G.M.); (S.D.)
| | | | - Maria Pia Adorni
- Department of Medicine and Surgery, University of Parma, Via Volturno 39/F, 43125 Parma, Italy;
| | - Bianca Papotti
- Department of Food and Drug, University of Parma, Viale delle Scienze 27/A, 43124 Parma, Italy;
| | - Stefano Dall’Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy; (I.R.); (G.M.); (S.D.)
| | - Nicola Ferri
- Department of Medicine, University of Padova, 35128 Padova, Italy;
- Veneto Institute of Molecular Medicine (VIMM), Via Orus, 2, 35129 Padova, Italy
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Ciesielska M, Adamiec M, Luciński R. S2P2-the chloroplast-located intramembrane protease and its impact on the stoichiometry and functioning of the photosynthetic apparatus of A. thaliana. FRONTIERS IN PLANT SCIENCE 2024; 15:1372318. [PMID: 38559762 PMCID: PMC10978774 DOI: 10.3389/fpls.2024.1372318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 02/26/2024] [Indexed: 04/04/2024]
Abstract
S2P2 is a nuclear-encoded protease, potentially located in chloroplasts, which belongs to the zinc-containing, intramembrane, site-2 protease (S2P) family. In A. thaliana cells, most of the S2P proteases are located within the chloroplasts, where they play an important role in the development of chloroplasts, maintaining proper stoichiometric relations between polypeptides building photosynthetic complexes and influencing the sensitivity of plants to photoinhibitory conditions. Among the known chloroplast S2P proteases, S2P2 protease is one of the least known. Its exact location within the chloroplast is not known, nor is anything known about its possible physiological functions. Therefore, we decided to investigate an intra-chloroplast localization and the possible physiological role of S2P2. To study the intra-chloroplast localization of S2P2, we used specific anti-S2P2 antibodies and highly purified chloroplast fractions containing envelope, stroma, and thylakoid proteins. To study the physiological role of the protease, we used two lines of insertion mutants lacking the S2P2 protease protein. Here, we present results demonstrating the thylakoid localization of S2P2. Moreover, we present experimental evidence indicating that the lack of S2P2 in A. thaliana chloroplasts leads to a significant decrease in the level of photosystem I and photosystem II core proteins: PsaB, PsbA, PsbD, and PsbC, as well as polypeptides building both the main light-harvesting antenna (LHC II), Lhcb1 and Lhcb2, as well as Lhcb4 and Lhcb5 polypeptides, constituting elements of the minor, peripheral antenna system. These changes are associated with a decrease in the number of PS II-LHC II supercomplexes. The consequence of these disorders is a greater sensitivity of s2p2 mutants to photoinhibition. The obtained results clearly indicate that the S2P2 protease is another thylakoid protein that plays an important role in the proper functioning of A. thaliana chloroplasts, especially in high-light-intensity conditions.
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Affiliation(s)
| | | | - Robert Luciński
- Department of Plant Physiology, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
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Yang F, Xu X, Hu B, Zhang Z, Chen K, Yu Y, Bai H, Tan A. Lipid homeostasis is essential for oogenesis and embryogenesis in the silkworm, Bombyx mori. Cell Mol Life Sci 2024; 81:127. [PMID: 38472536 DOI: 10.1007/s00018-024-05173-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/20/2024] [Accepted: 02/10/2024] [Indexed: 03/14/2024]
Abstract
Reproduction, a fundamental feature of all known life, closely correlates with energy homeostasis. The control of synthesizing and mobilizing lipids are dynamic and well-organized processes to distribute lipid resources across tissues or generations. However, how lipid homeostasis is precisely coordinated during insect reproductive development is poorly understood. Here we describe the relations between energy metabolism and reproduction in the silkworm, Bombyx mori, a lepidopteran model insect, by using CRISPR/Cas9-mediated mutation analysis and comprehensively functional investigation on two major lipid lipases of Brummer (BmBmm) and hormone-sensitive lipase (BmHsl), and the sterol regulatory element binding protein (BmSrebp). BmBmm is a crucial regulator of lipolysis to maintain female fecundity by regulating the triglyceride (TG) storage among the midgut, the fat body, and the ovary. Lipidomics analysis reveals that defective lipolysis of females influences the composition of TG and other membrane lipids in the BmBmm mutant embryos. In contrast, BmHsl mediates embryonic development by controlling sterol metabolism rather than TG metabolism. Transcriptome analysis unveils that BmBmm deficiency significantly improves the expression of lipid synthesis-related genes including BmSrebp in the fat body. Subsequently, we identify BmSrebp as a key regulator of lipid accumulation in oocytes, which promotes oogenesis and cooperates with BmBmm to support the metabolic requirements of oocyte production. In summary, lipid homeostasis plays a vital role in supporting female reproductive success in silkworms.
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Affiliation(s)
- Fangying Yang
- Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Xiaoyan Xu
- Core Facility Center, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Bo Hu
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212100, China
| | - Zhongjie Zhang
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212100, China
| | - Kai Chen
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212100, China
| | - Ye Yu
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212100, China
| | - Hua Bai
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Anjiang Tan
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212100, China.
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212100, China.
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Rong S, Xia M, Vale G, Wang S, Kim CW, Li S, McDonald JG, Radhakrishnan A, Horton JD. DGAT2 inhibition blocks SREBP-1 cleavage and improves hepatic steatosis by increasing phosphatidylethanolamine in the ER. Cell Metab 2024; 36:617-629.e7. [PMID: 38340721 PMCID: PMC10939742 DOI: 10.1016/j.cmet.2024.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 11/28/2023] [Accepted: 01/18/2024] [Indexed: 02/12/2024]
Abstract
Diacylglycerol acyltransferase 2 (DGAT2) catalyzes the final step of triglyceride (TG) synthesis. DGAT2 deletion in mice lowers liver TGs, and DGAT2 inhibitors are under investigation for the treatment of fatty liver disease. Here, we show that DGAT2 inhibition also suppressed SREBP-1 cleavage, reduced fatty acid synthesis, and lowered TG accumulation and secretion from liver. DGAT2 inhibition increased phosphatidylethanolamine (PE) levels in the endoplasmic reticulum (ER) and inhibited SREBP-1 cleavage, while DGAT2 overexpression lowered ER PE concentrations and increased SREBP-1 cleavage in vivo. ER enrichment with PE blocked SREBP-1 cleavage independent of Insigs, which are ER proteins that normally retain SREBPs in the ER. Thus, inhibition of DGAT2 shunted diacylglycerol into phospholipid synthesis, increasing the PE content of the ER, resulting in reduced SREBP-1 cleavage and less hepatic steatosis. This study reveals a new mechanism that regulates SREBP-1 activation and lipogenesis that is independent of sterols and SREBP-2 in liver.
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Affiliation(s)
- Shunxing Rong
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA; Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
| | - Mingfeng Xia
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA; Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Goncalo Vale
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA; Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
| | - Simeng Wang
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
| | - Chai-Wan Kim
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA; Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
| | - Shili Li
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
| | - Jeffrey G McDonald
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA; Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
| | - Arun Radhakrishnan
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
| | - Jay D Horton
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA; Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA; Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA.
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47
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Jung S, Yu H, Ko KS. Novel effects of prohibitin 1 expression level on cholesterol and lipid homeostasis. J Nutr Biochem 2024; 125:109561. [PMID: 38176624 DOI: 10.1016/j.jnutbio.2023.109561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/15/2023] [Accepted: 12/31/2023] [Indexed: 01/06/2024]
Abstract
Prohibitin 1 (PHB1) plays an important role in maintaining liver health and function. The PHB1 level is decreased in patients with various liver diseases. In this study, liver cancer was induced in liver-specific Phb1 knock-out mice, which were then subjected to hepatic gene and metabolomic analysis. The reduced expression of mRNA expression level of Phb1 induced down-regulation of cholesterol and lipid metabolism. This result was confirmed in a cell model. The expression of Hmgcr and Srebp2 in normal cells decreased when they were treated with cholesterol. In HepG2 cells in which the expression of Phb1 was lowered using siPhb1, the mRNA expression of Hmgcr and Srebp2 also decreased when the cells were treated with cholesterol. Furthermore, in the Phb1 knock-out group, the expression of Fasn and Srebp1 related to lipid metabolism increased but the expression of Ldlr decreased. The expression of Cat and Gpx in cells increased when the expression of Phb1 decreased. Altogether, a decreased expression of Phb1 induces down-regulation of cholesterol- and lipid metabolism-related genes and cholesterol homeostasis is not achieved, particularly in a cholesterol-rich environment. The decrease in Phb1 expression causes excessive oxidative stress in cholesterol and lipid metabolism. Therefore, maintaining a normal level of PHB1 expression is crucial for maintaining cholesterol homeostasis in the liver. Thus, PHB1 may become an important target for non-alcoholic fatty liver disease and lipid metabolism in the future.
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Affiliation(s)
- Soohan Jung
- Department of Integrated Biomedical and Life Science, Korea University, Seoul, Republic of Korea
| | - Hyeonju Yu
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul, Republic of Korea; Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Kwang Suk Ko
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul, Republic of Korea; Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul, Republic of Korea.
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Nag S, Mandal S, Mukherjee O, Majumdar T, Mukhopadhyay S, Kundu R. Vildagliptin inhibits high fat and fetuin-A mediated DPP-4 expression, intracellular lipid accumulation and improves insulin secretory defects in pancreatic beta cells. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167047. [PMID: 38296116 DOI: 10.1016/j.bbadis.2024.167047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/16/2024] [Accepted: 01/26/2024] [Indexed: 02/05/2024]
Abstract
Dipeptidyl peptidase-4 (DPP-4), a ubiquitous proteolytic enzyme, inhibits insulin secretion from pancreatic beta cells by inactivating circulating incretin hormones GLP-1 and GIP. High circulating levels of DPP-4 is presumed to compromise insulin secretion in people with type 2 diabetes (T2D). Our group recently reported lipid induced DPP-4 expression in pancreatic beta cells, mediated by the TLR4-NFkB pathway. In the present study, we looked at the role of Vildagliptin on pancreatic DPP-4 inhibition, preservation of islet mass and restoration of insulin secretion. MIN6 mouse insulinoma cells incubated with palmitate and fetuin-A, a proinflammatory organokine associated with insulin resistance, showed activation of TLR4-NFkB pathway, which was rescued on Vildagliptin treatment. In addition, Vildagliptin, by suppressing palmitate-fetuin-A mediated DPP-4 expression in MIN6, prevented the secretion of IL-1beta and fetuin-A in the culture media. DPP-4 siRNA abrogated TLR4-NFkB pathway mediated islet cell inflammation. Vildagliptin also reduced palmitate-fetuin-A mediated intracellular lipid accumulation in MIN6 and isolated islets from high fat fed (HFD) mice as observed by Oil O Red staining with downregulation of CD36 and PPARgamma. Vildagliptin also preserved islet mass and rescued insulin secretory defect in HFD mice. Our results suggest that inhibition of DPP-4 by Vildagliptin protects pancreatic beta cells from the deleterious effects of lipid and fetuin-A, preserves insulin secretory functions and improves hyperglycemia.
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Affiliation(s)
- Snehasish Nag
- Cell Signaling Laboratory, Department of Zoology, Siksha Bhavana (Institute of Science), Visva-Bharati University, Santiniketan 731235, India
| | - Samanwita Mandal
- Cell Signaling Laboratory, Department of Zoology, Siksha Bhavana (Institute of Science), Visva-Bharati University, Santiniketan 731235, India
| | - Oindrila Mukherjee
- Cell Signaling Laboratory, Department of Zoology, Siksha Bhavana (Institute of Science), Visva-Bharati University, Santiniketan 731235, India
| | - Tanmay Majumdar
- National Institute of Immunology (NII), Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Satinath Mukhopadhyay
- Department of Endocrinology & Metabolism, Institute of Post-Graduate Medical Education & Research-Seth Sukhlal Karnani Memorial Hospital (IPGME&R-SSKM), Kolkata 700020, India
| | - Rakesh Kundu
- Cell Signaling Laboratory, Department of Zoology, Siksha Bhavana (Institute of Science), Visva-Bharati University, Santiniketan 731235, India.
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Fu Z, Shi Y, Yu S, Zhao Q, Mo H, Yang P. Variation of gene expression of fatty acid acyl CoA reductase associated with wax secretion of a scale insect, Ericerus pela, and identification of its regulation factors through the accessible chromatin analyses and yeast one-hybrid. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2024; 115:e22101. [PMID: 38500444 DOI: 10.1002/arch.22101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/11/2024] [Accepted: 03/06/2024] [Indexed: 03/20/2024]
Abstract
The Chinese white wax scale insect (CWWSI), Ericerus pela, can secret an amount of wax equivalent to their body weight. Previous studies demonstrated the fatty acyl-CoA reductase (far3) plays a pivotal role in wax secretion of CWWSI. The high expression of far3 is crucial for the massive wax secretion. However, the transcription regulation of far3 was not clear. To identify regulatory factors that control the expression of far3, the assay for transposase-accessible chromatin (ATAC) and yeast one-hybrid (Y1H) were carried out in this study. The ATAC sequencing of the CWWSI at the early wax-secretion stage ATAC-seq resulted in 22.75 GB raw data, generated 75,827,225 clean reads and revealed 142,771 peaks. There was one significant peak in the 3 kb upstream regulation regions. The peak sequence is located between -1000 and -670 bp upstream of the far3 transcription start site, spanning a length of 331 bp. This peak sequence served as bait for creating the pAbAi-peak recombinant vector, used in Y1H screenings to identify proteins interacting with far3 gene. The results indicate a successful CWWSI cDNA library construction with a capacity of 1.2 × 107 colony forming unit, a 95.8% recombination rate, and insert sizes between 1,000 and 2,000 bp. Self-activation tests established that 100 ng/mL of AbA effectively inhibited bait vector self-activation. Finally, a total of 88 positive clones were selected. After sequencing and removal of duplication, 63 unique clones were obtained from these screened colonies. By aligning the clone sequences with full-length transcriptome and genome of CWWSI, the full-length coding sequences of these clones were obtained. BlastX analysis identified a transcription factor, nuclear transcription factor Y beta, and two co-activators, cAMP-response-element-binding-protein-binding protein and WW domain binding protein 2. Reverse transcription quantitative polymerase chain reaction analysis confirmed that their expression patterns were consistent with the developmental stages preceding wax secretion and matched the wax secretion characteristics during ovulation periods. These results are beneficial for further research into the regulatory mechanisms of wax secretion of CWWSI.
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Affiliation(s)
- Zuoyi Fu
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming, China
- Nanjing Forestry University, Nanjing, China
| | - Yuanchong Shi
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming, China
| | - Shuhui Yu
- College of Agriculture and Life Sciences, Kunming University, Kunming, China
| | - Qiuyu Zhao
- College of Agriculture and Life Sciences, Kunming University, Kunming, China
| | - Haifeng Mo
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming, China
| | - Pu Yang
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming, China
- Key Laboratory of Breeding and Utilization of Resource Insects of National Forestry and Grassland Administration, Kunming, China
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50
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Huang P, Ran J, Zhu W, Dai W, Tang Y, Lian P, Huang X, Li R. PCSK9 dysregulates cholesterol homeostasis and triglyceride metabolism in olanzapine-induced hepatic steatosis via both receptor-dependent and receptor-independent pathways. FASEB J 2024; 38:e23464. [PMID: 38358343 DOI: 10.1096/fj.202301748r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/06/2024] [Accepted: 01/22/2024] [Indexed: 02/16/2024]
Abstract
Schizophrenia, affecting approximately 1% of the global population, is often treated with olanzapine. Despite its efficacy, olanzapine's prolonged use has been associated with an increased risk of cardiovascular diseases and nonalcoholic fatty liver disease (NAFLD); however, the underlying mechanism remains unclear. Proprotein convertase subtilisin kexin type 9 (PCSK9) plays a crucial role in lipid metabolism and is involved in NAFLD pathogenesis via an unknown mechanism. This study aims to investigate the role of PCSK9 in olanzapine-induced NAFLD. C57BL/6J mice and HepG2 and AML12 cell lines were treated with varying concentrations of olanzapine to examine the effects of olanzapine on PCSK9 and lipid metabolism. PCSK9 levels were manipulated using recombinant proteins, plasmids, and small interfering RNAs in vitro, and the effects on hepatic lipid accumulation and gene expression related to lipid metabolism were assessed. Olanzapine treatment significantly increased PCSK9 levels in both animal and cell line models, correlating with elevated lipid accumulation. PCSK9 manipulation demonstrated its central role in mediating hepatic steatosis through both receptor-dependent pathways (impacting NPC1L1) and receptor-independent pathways (affecting lipid synthesis, uptake, and cholesterol biosynthesis). Interestingly, upregulation of SREBP-1c, rather than SREBP-2, was identified as a key driver of PCSK9 increase in olanzapine-induced NAFLD. Our findings establish PCSK9 as a pivotal factor in olanzapine-induced NAFLD, influencing both receptor-related and metabolic pathways. This highlights PCSK9 inhibitors as potential therapeutic agents for managing NAFLD in schizophrenia patients treated with olanzapine.
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Affiliation(s)
- Piaopiao Huang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Juanli Ran
- Department of Stomatology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Wenqiang Zhu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Wen Dai
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- Department of Medicine, Columbia University Medical Center, New York, New York, USA
| | - Yaxin Tang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Pingan Lian
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiansheng Huang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Rong Li
- Department of Stomatology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
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