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Li Y, Tian L, Li S, Chen X, Lei F, Bao J, Wu Q, Wen Y, Jie Y. Disrupted mitochondrial transcription factor A expression promotes mitochondrial dysfunction and enhances ocular surface inflammation by activating the absent in melanoma 2 inflammasome. Free Radic Biol Med 2024; 222:106-121. [PMID: 38797339 DOI: 10.1016/j.freeradbiomed.2024.05.032] [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: 03/28/2024] [Revised: 05/07/2024] [Accepted: 05/17/2024] [Indexed: 05/29/2024]
Abstract
PURPOSE Severe dry eye disease causes ocular surface damage, which is highly associated with mitochondrial dysfunction. Mitochondrial transcription factor A (TFAM) is essential for packaging mitochondrial DNA (mtDNA) and is crucial for maintaining mitochondrial function. Herein, we aimed to explore the effect of a decreased TFAM expression on ocular surface damage. METHODS Female C57BL/6 mice were induced ocular surface injury by topical administrating benzalkonium chloride (BAC). Immortalized human corneal epithelial cells (HCECs) were stimulated by tert-butyl hydroperoxide (t-BHP) to create oxidative stress damage. HCECs with TFAM knockdown were established. RNA sequencing was employed to analyze the whole-genome expression. Mitochondrial changes were measured by transmission electron microscopy, Seahorse metabolic flux analysis, mitochondrial membrane potential, and mtDNA copy number. TFAM expression and inflammatory cytokines were determined using RT-qPCR, immunohistochemistry, immunofluorescence, and immunoblotting. RESULTS In both the corneas of BAC-treated mice and t-BHP-induced HCECs, we observed impaired TFAM expression, accompanied by mitochondrial structure and function defects. TFAM downregulation in HCECs suppressed mitochondrial respiratory capacity, reduced mtDNA content, induced mtDNA leakage into the cytoplasm, and led to inflammation. RNA sequencing revealed the absent in melanoma 2 (AIM2) inflammasome was activated in the corneas of BAC-treated mice. The AIM2 inflammasome activation was confirmed in TFAM knockdown HCECs. TFAM knockdown in t-BHP-stimulated HCECs aggravated mitochondrial dysfunction and the AIM2 inflammasome activation, thereby further triggering the secretion of inflammatory factors such as interleukin (IL) -1β and IL-18. CONCLUSIONS TFAM reduction impaired mitochondrial function, activated AIM2 inflammasome and promoted ocular surface inflammation, revealing an underlying molecular mechanism for ocular surface disorders.
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Affiliation(s)
- Yaqiong Li
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
| | - Lei Tian
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
| | - Siyuan Li
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
| | - Xiaoniao Chen
- Department of Ophthalmology, The Third Medical Center of Chinese People's Liberation Army General Hospital, Beijing, 100039, China.
| | - Fengyang Lei
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
| | - Jiayu Bao
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
| | - Qianru Wu
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
| | - Ya Wen
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
| | - Ying Jie
- Beijing Institute of Ophthalmology, Beijing TongRen Eye Center, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China.
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Han X, Li W, He X, Lu X, Zhang Y, Li Y, Bi G, Ma X, Huang X, Bai R, Zhang H. Blockade of TGF-β signalling alleviates human adipose stem cell senescence induced by native ECM in obesity visceral white adipose tissue. Stem Cell Res Ther 2023; 14:291. [PMID: 37807066 PMCID: PMC10561428 DOI: 10.1186/s13287-023-03525-y] [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: 01/03/2023] [Accepted: 09/27/2023] [Indexed: 10/10/2023] Open
Abstract
BACKGROUND Abdominal obesity is appreciated as a major player in insulin resistance and metabolically dysfunctional adipose tissue. Inappropriate extracellular matrix (ECM) remodelling and functional alterations in human adipose stromal/stem cells (hASCs) have been linked with visceral white adipose tissue (vWAT) dysfunction in obesity. Understanding the interactions between hASCs and the native ECM environment in obese vWAT is required for the development of future therapeutic approaches for obesity-associated metabolic complications. METHODS The phenotypes and transcriptome properties of hASCs from the vWAT of obese patients and lean donors were assessed. The hASC-derived matrix from vWAT of obese or lean patients was generated in vitro using a decellularized method. The topography and the major components of the hASC-derived matrix were determined. The effects of the obese hASC-derived matrix on cell senescence and mitochondrial function were further determined. RESULTS We showed that hASCs derived from the vWAT of obese patients exhibited senescence and were accompanied by the increased production of ECM. The matrix secreted by obese hASCs formed a fibrillar suprastructure with an abundance of fibronectin, type I collagen, and transforming growth factor beta 1 (TGF-β1), which resembles the native matrix microenvironment of hASCs in vWAT derived from obese patients. Furthermore, the obese hASC-derived matrix promoted lean hASC ageing and induced mitochondrial dysfunction compared to the lean hASC-derived matrix. Blockade of TGF-β1 signalling using an anti-TGF-β1 neutralizing antibody alleviated the lean hASC senescence and mitochondrial dysfunction induced by the obese hASC-derived matrix. CONCLUSIONS Native ECM in obesity vWAT initiates hASC senescence through TGF-β1-mediated mitochondrial dysfunction. These data provide a key mechanism for understanding the importance of cell-ECM interactions in hASCs senescence in obesity.
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Affiliation(s)
- Xueya Han
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Weihong Li
- Experimental Center for Basic Medical Teaching, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xu He
- Experimental Center for Basic Medical Teaching, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xin Lu
- Experimental Center for Basic Medical Teaching, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Yu Zhang
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Yaqiong Li
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Guoyun Bi
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xuqing Ma
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xiaowu Huang
- Fu Xing Hospital, Capital Medical University, Beijing, 100038, China
| | - Rixing Bai
- Department of General Surgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100070, China
| | - Haiyan Zhang
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China.
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Sagar S, Faizan MI, Chaudhary N, Singh V, Singh P, Gheware A, Sharma K, Azmi I, Singh VP, Kharya G, Mabalirajan U, Agrawal A, Ahmad T, Sinha Roy S. Obesity impairs cardiolipin-dependent mitophagy and therapeutic intercellular mitochondrial transfer ability of mesenchymal stem cells. Cell Death Dis 2023; 14:324. [PMID: 37173333 PMCID: PMC10181927 DOI: 10.1038/s41419-023-05810-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 04/05/2023] [Accepted: 04/13/2023] [Indexed: 05/15/2023]
Abstract
Mesenchymal stem cell (MSC) transplantation alleviates metabolic defects in diseased recipient cells by intercellular mitochondrial transport (IMT). However, the effect of host metabolic conditions on IMT and thereby on the therapeutic efficacy of MSCs has largely remained unexplored. Here we found impaired mitophagy, and reduced IMT in MSCs derived from high-fat diet (HFD)-induced obese mouse (MSC-Ob). MSC-Ob failed to sequester their damaged mitochondria into LC3-dependent autophagosomes due to decrease in mitochondrial cardiolipin content, which we propose as a putative mitophagy receptor for LC3 in MSCs. Functionally, MSC-Ob exhibited diminished potential to rescue mitochondrial dysfunction and cell death in stress-induced airway epithelial cells. Pharmacological modulation of MSCs enhanced cardiolipin-dependent mitophagy and restored their IMT ability to airway epithelial cells. Therapeutically, these modulated MSCs attenuated features of allergic airway inflammation (AAI) in two independent mouse models by restoring healthy IMT. However, unmodulated MSC-Ob failed to do so. Notably, in human (h)MSCs, induced metabolic stress associated impaired cardiolipin-dependent mitophagy was restored upon pharmacological modulation. In summary, we have provided the first comprehensive molecular understanding of impaired mitophagy in obese-derived MSCs and highlight the importance of pharmacological modulation of these cells for therapeutic intervention. A MSCs obtained from (HFD)-induced obese mice (MSC-Ob) show underlying mitochondrial dysfunction with a concomitant decrease in cardiolipin content. These changes prevent LC3-cardiolipin interaction, thereby reducing dysfunctional mitochondria sequestration into LC3-autophagosomes and thus impaired mitophagy. The impaired mitophagy is associated with reduced intercellular mitochondrial transport (IMT) via tunneling nanotubes (TNTs) between MSC-Ob and epithelial cells in co-culture or in vivo. B Pyrroloquinoline quinone (PQQ) modulation in MSC-Ob restores mitochondrial health, cardiolipin content, and thereby sequestration of depolarized mitochondria into the autophagosomes to alleviate impaired mitophagy. Concomitantly, MSC-Ob shows restoration of mitochondrial health upon PQQ treatment (MSC-ObPQQ). During co-culture with epithelial cells or transplantation in vivo into the mice lungs, MSC-ObPQQ restores IMT and prevents epithelial cell death. C Upon transplantation in two independent allergic airway inflammatory mouse models, MSC-Ob failed to rescue the airway inflammation, hyperactivity, metabolic changes in epithelial cells. D PQQ modulated MSCs restored these metabolic defects and restored lung physiology and airway remodeling parameters.
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Affiliation(s)
- Shakti Sagar
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, 110007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Md Imam Faizan
- Multidisciplinary Center for Advanced Research and Studies, Jamia Millia Islamia, New Delhi, 110025, India
| | - Nisha Chaudhary
- Multidisciplinary Center for Advanced Research and Studies, Jamia Millia Islamia, New Delhi, 110025, India
| | - Vandana Singh
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, 110007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Praveen Singh
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, 110007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Atish Gheware
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Khushboo Sharma
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, 110007, India
| | - Iqbal Azmi
- Multidisciplinary Center for Advanced Research and Studies, Jamia Millia Islamia, New Delhi, 110025, India
| | - Vijay Pal Singh
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, 110007, India
| | - Gaurav Kharya
- Center for Bone Marrow Transplantation & Cellular Therapy Indraprastha Apollo Hospital, New Delhi, 110076, India
| | | | - Anurag Agrawal
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, 110007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Tanveer Ahmad
- Multidisciplinary Center for Advanced Research and Studies, Jamia Millia Islamia, New Delhi, 110025, India.
| | - Soumya Sinha Roy
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, 110007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Oh KK, Yoon SJ, Lee SB, Lee SY, Gupta H, Ganesan R, Sharma SP, Won SM, Jeong JJ, Kim DJ, Suk KT. The convergent application of metabolites from Avena sativa and gut microbiota to ameliorate non-alcoholic fatty liver disease: a network pharmacology study. J Transl Med 2023; 21:263. [PMID: 37069607 PMCID: PMC10111676 DOI: 10.1186/s12967-023-04122-6] [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: 02/06/2023] [Accepted: 04/09/2023] [Indexed: 04/19/2023] Open
Abstract
BACKGROUND Non-alcoholic fatty liver disease (NAFLD) is a serious public health issue globally, currently, the treatment of NAFLD lies still in the labyrinth. In the inchoate stage, the combinatorial application of food regimen and favorable gut microbiota (GM) are considered as an alternative therapeutic. Accordingly, we integrated secondary metabolites (SMs) from GM and Avena sativa (AS) known as potent dietary grain to identify the combinatorial efficacy through network pharmacology. METHODS We browsed the SMs of AS via Natural Product Activity & Species Source (NPASS) database and SMs of GM were retrieved by gutMGene database. Then, specific intersecting targets were identified from targets related to SMs of AS and GM. The final targets were selected on NAFLD-related targets, which was considered as crucial targets. The protein-protein interaction (PPI) networks and bubble chart analysis to identify a hub target and a key signaling pathway were conducted, respectively. In parallel, we analyzed the relationship of GM or AS─a key signaling pathway─targets─SMs (GASTM) by merging the five components via RPackage. We identified key SMs on a key signaling pathway via molecular docking assay (MDA). Finally, the identified key SMs were verified the physicochemical properties and toxicity in silico platform. RESULTS The final 16 targets were regarded as critical proteins against NAFLD, and Vascular Endothelial Growth Factor A (VEGFA) was a key target in PPI network analysis. The PI3K-Akt signaling pathway was the uppermost mechanism associated with VEGFA as an antagonistic mode. GASTM networks represented 122 nodes (60 GM, AS, PI3K-Akt signaling pathway, 4 targets, and 56 SMs) and 154 edges. The VEGFA-myricetin, or quercetin, GSK3B-myricetin, IL2-diosgenin complexes formed the most stable conformation, the three ligands were derived from GM. Conversely, NR4A1-vestitol formed stable conformation with the highest affinity, and the vestitol was obtained from AS. The given four SMs were no hurdles to develop into drugs devoid of its toxicity. CONCLUSION In conclusion, we show that combinatorial application of AS and GM might be exerted to the potent synergistic effects against NAFLD, dampening PI3K-Akt signaling pathway. This work provides the importance of dietary strategy and beneficial GM on NAFLD, a data mining basis for further explicating the SMs and pharmacological mechanisms of combinatorial application (AS and GM) against NAFLD.
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Affiliation(s)
- Ki-Kwang Oh
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Sang-Jun Yoon
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Su-Been Lee
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Sang Youn Lee
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Haripriya Gupta
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Raja Ganesan
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Satya Priya Sharma
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Sung-Min Won
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Jin-Ju Jeong
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Dong Joon Kim
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea
| | - Ki-Tae Suk
- Institute for Liver and Digestive Diseases, College of Medicine, Hallym University, Chuncheon, 24252, Korea.
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Qi Y, Wu Z, Chen D, Zhu L, Yang Y. A role of STING signaling in obesity-induced lung inflammation. Int J Obes (Lond) 2023; 47:325-334. [PMID: 36782056 PMCID: PMC9924210 DOI: 10.1038/s41366-023-01272-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 01/30/2023] [Accepted: 02/01/2023] [Indexed: 02/15/2023]
Abstract
BACKGROUND It is established that pulmonary disorders are comorbid with metabolic disorders such as obesity. Previous studies show that the stimulator of interferon genes (STING) signaling plays crucial roles in obesity-induced chronic inflammation via TANK-binding kinase 1 (TBK1) pathways. However, it remains unknown whether and how the STING signaling is implicated in the inflammatory processes in the lung in obesity. METHODS Human lung tissues were obtained from obese patients (n = 3) and controls (n = 3). Mice were fed with the high-fat diet or regular control diet to establish the diet-induced obese (DIO) and lean mice, and were treated with C-176 (a specific STING inhibitor) or vehicle respectively. The lung macrophages were exposed to palmitic acid (PA) in vitro. The levels of STING singaling and metabolic inflammation factors were detected and anlyzed. RESULTS We find that STING+/CD68+ macrophages are increased in lung tissues in patients with obesity. Our data also show that the expressions of STING and the levels of proinflammatory cytokines are increased both in lung tissues and bronchoalveolar lavage fluid (BALF) in obesity compared to controls, and inhibition of the STING blunted the obesity-induced lung inflammation. Mechanistically, our data demonstrate that the STING signaling pathway is involved in the PA-induced inflammation through the STING-TBK1-IRF3 (interferon regulatory factor 3)/NF-κB (nuclear factor kappa B) pathways in the lung macrophages. CONCLUSIONS Our results collectively suggest that the STING signaling contributes to obesity-associated inflammation by stimulating proinflammatory processes in lung macrophages, one that may serve as a therapeutic target in ameliorating obesity-related lung dysfunctions.
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Affiliation(s)
- Yong Qi
- Department of Pulmonary and Critical Care Medicine, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.
| | - Zhuhua Wu
- Department of Pulmonary and Critical Care Medicine, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China
| | - Dan Chen
- Department of Pulmonary and Critical Care Medicine, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China
- Department of Medicine Division of Endocrinology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | - Li Zhu
- Department of Pulmonary and Critical Care Medicine, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China
| | - Yunlei Yang
- Department of Medicine Division of Endocrinology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
- Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
- Einstein-Mount Sinai Diabetes Research Center, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
- The Fleischer Institute for Diabetes and Metabolism, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
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Aslan A, Gok O, Beyaz S, Parlak G, Can MI, Gundogdu R, Baspinar S, Ozercan IH, Parlak AE. Royal jelly arranges apoptotic and oxidative stress pathways and reduces damage to liver tissues of rats by down-regulation of Bcl-2, GSK3 and NF-κB and up-regulation of caspase and Nrf-2 protein signalling pathways. Biomarkers 2023; 28:217-226. [PMID: 36520139 DOI: 10.1080/1354750x.2022.2159526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
IntroductionRoyal jelly (RJ) from the honey bee, Apis mellifera, is a traditional product that is widely used as a food supplement to support the medical treatment of various diseases.Material and methodsOur study continued for 8 weeks. 42 Wistar albino (8 weeks old) male rats were used in the study. The study included 6 groups; Group 1: Control group (fed with standard diet), Group 2: RJ (100 mg/kg, bw), Group 3: F-50 (50 mg/kg, bw), group 4: F-100 (100 mg/kg, bw) group 5: F-50 (50 mg/kg, bw) + RJ (100 mg/kg, bw) Group 6: F-100 (100 mg/kg, bw) + RJ (100 mg/kg, bw). Malondialdehyde (MDA), catalase (CAT) and glutathione (GSH) activities in liver tissue were determined by spectrophotometer. Liver tissue samples were examined histopathologically and various protein levels were determined by Western blotting technique.ResultsRJ caused a significant decrease in MDA level, Bcl-2, GSK3 and NF-κB protein expression levels, whereas induced a significant increase in GSH level, CAT activities and Bax, BDNF, caspase-6, caspase-3, Nrf-2 protein expression levels.ConclusionOur findings suggest RJ to be used as a hepatoprotective agent in the clinic to modulate the toxic effects of fluoride and other chemicals in the future.
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Affiliation(s)
- Abdullah Aslan
- Faculty of Science, Department of Biology-Molecular Biology and Genetics Program, Firat University, Elazig, Turkey
| | - Ozlem Gok
- Faculty of Science, Department of Biology-Molecular Biology and Genetics Program, Firat University, Elazig, Turkey
| | - Seda Beyaz
- Faculty of Science, Department of Biology-Molecular Biology and Genetics Program, Firat University, Elazig, Turkey
| | - Gozde Parlak
- Faculty of Science, Department of Biology-Molecular Biology and Genetics Program, Firat University, Elazig, Turkey
| | - Muhammed Ismail Can
- Faculty of Science, Department of Biology, Inonu University, Malatya, Turkey
| | - Ramazan Gundogdu
- Department of Pharmacy Services, Vocational School of Health Services, Bingol University, Bingol, 12000, Turkey
| | - Serpil Baspinar
- Department of Medical Imaging, Health Services Vocational High School, Firat University, Elazig, Turkey
| | | | - Akif Evren Parlak
- Department of Environmental Protection Technologies, Keban Vocational School, Firat University, Elazig, Turkey
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Rohbeck E, Niersmann C, Köhrer K, Wachtmeister T, Roden M, Eckel J, Romacho T. Positive allosteric GABA A receptor modulation counteracts lipotoxicity-induced gene expression changes in hepatocytes in vitro. Front Physiol 2023; 14:1106075. [PMID: 36860523 PMCID: PMC9968943 DOI: 10.3389/fphys.2023.1106075] [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: 11/23/2022] [Accepted: 01/31/2023] [Indexed: 02/16/2023] Open
Abstract
Introduction: We have previously shown that the novel positive allosteric modulator of the GABAA receptor, HK4, exerts hepatoprotective effects against lipotoxicity-induced apoptosis, DNA damage, inflammation and ER stress in vitro. This might be mediated by downregulated phosphorylation of the transcription factors NF-κB and STAT3. The current study aimed to investigate the effect of HK4 on lipotoxicity-induced hepatocyte injury at the transcriptional level. Methods: HepG2 cells were treated with palmitate (200 μM) in the presence or absence of HK4 (10 μM) for 7 h. Total RNA was isolated and the expression profiles of mRNAs were assessed. Differentially expressed genes were identified and subjected to the DAVID database and Ingenuity Pathway Analysis software for functional and pathway analysis, all under appropriate statistical testing. Results: Transcriptomic analysis showed substantial modifications in gene expression in response to palmitate as lipotoxic stimulus with 1,457 differentially expressed genes affecting lipid metabolism, oxidative phosphorylation, apoptosis, oxidative and ER stress among others. HK4 preincubation resulted in the prevention of palmitate-induced dysregulation by restoring initial gene expression pattern of untreated hepatocytes comprising 456 genes. Out of the 456 genes, 342 genes were upregulated and 114 downregulated by HK4. Enriched pathways analysis of those genes by Ingenuity Pathway Analysis, pointed towards oxidative phosphorylation, mitochondrial dysregulation, protein ubiquitination, apoptosis, and cell cycle regulation as affected pathways. These pathways are regulated by the key upstream regulators TP53, KDM5B, DDX5, CAB39 L and SYVN1, which orchestrate the metabolic and oxidative stress responses including modulation of DNA repair and degradation of ER stress-induced misfolded proteins in the presence or absence of HK4. Discussion: We conclude that HK4 specifically targets mitochondrial respiration, protein ubiquitination, apoptosis and cell cycle. This not only helps to counteract lipotoxic hepatocellular injury through modification of gene expression, but - by targeting transcription factors responsible for DNA repair, cell cycle progression and ER stress - might even prevent lipotoxic mechanisms. These findings suggest that HK4 has a great potential for the treatment of non-alcoholic fatty liver disease (NAFLD).
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Affiliation(s)
- Elisabeth Rohbeck
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany,CureDiab Metabolic Research GmbH, Düsseldorf, Germany
| | - Corinna Niersmann
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany,CureDiab Metabolic Research GmbH, Düsseldorf, Germany
| | - Karl Köhrer
- Biological and Medical Research Centre (BMFZ), Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Thorsten Wachtmeister
- Biological and Medical Research Centre (BMFZ), Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Michael Roden
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany,Department of Endocrinology and Diabetology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Jürgen Eckel
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,CureDiab Metabolic Research GmbH, Düsseldorf, Germany
| | - Tania Romacho
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,Chronic Complications of Diabetes Lab (ChroCoDiL), Department of Nursing Sciences, Physiotherapy and Medicine, Faculty of Health Sciences, University of Almería, Almería, Spain,*Correspondence: Tania Romacho,
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Aslan A, Gok O, Beyaz S, Can MI, Parlak G, Gundogdu R, Ozercan IH, Baspinar S. Royal jelly regulates the caspase, Bax and COX-2, TNF-α protein pathways in the fluoride exposed lung damage in rats. Tissue Cell 2022; 76:101754. [DOI: 10.1016/j.tice.2022.101754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 02/04/2022] [Accepted: 02/06/2022] [Indexed: 11/16/2022]
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