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Kong JN, Dipon Ghosh D, Savvidis A, Sando SR, Droste R, Robert Horvitz H. Transcriptional landscape of a hypoxia response identifies cell-specific pathways for adaptation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.02.601765. [PMID: 39005398 PMCID: PMC11245032 DOI: 10.1101/2024.07.02.601765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
How the HIF-1 (Hypoxia-Inducible) transcription factor drives and coordinates distinct responses to low oxygen across diverse cell types is poorly understood. We present a multi-tissue single-cell gene-expression atlas of the hypoxia response of the nematode Caenorhabditis elegans . This atlas highlights how cell-type-specific HIF-1 responses overlap and diverge among and within neuronal, intestinal, and muscle tissues. Using the atlas to guide functional analyses of candidate muscle-specific HIF-1 effectors, we discovered that HIF-1 activation drives downregulation of the tspo-1 ( TSPO, Translocator Protein) gene in vulval muscle cells to modulate a hypoxia-driven change in locomotion caused by contraction of body-wall muscle cells. We further showed that in human cardiomyocytes HIF-1 activation decreases levels of TSPO and thereby alters intracellular cholesterol transport and the mitochondrial network. We suggest that TSPO-1 is an evolutionarily conserved mediator of HIF-1-dependent modulation of muscle and conclude that our gene-expression atlas can help reveal how HIF-1 drives cell-specific adaptations to hypoxia.
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Yang SJ, Hsu CH, Lai CY, Tsai PC, Song YD, Yeh CC, Chen YY, Dou HY. Pathological granuloma fibrosis induced by agar-embedded Mycobacterium abscessus in C57BL/6JNarl mice. Front Immunol 2023; 14:1277745. [PMID: 38146374 PMCID: PMC10749312 DOI: 10.3389/fimmu.2023.1277745] [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: 08/15/2023] [Accepted: 11/27/2023] [Indexed: 12/27/2023] Open
Abstract
Introduction Pulmonary granuloma diseases caused by Mycobacterium abscessus (M. abscessus) have increased in past decades, and drug-resistance in this pathogen is a growing public health concern. Therefore, an animal model of chronic granuloma disease is urgently needed. Methods In this study, M. abscessus embedded within agar beads (agar-AB) was used to develop such a model in C57BL/6JNarl mice. Results Chronic infection was sustained for at least 3 months after agar-AB infection, visible granulomas spread in the lungs, and giant cells and foamy cells appeared in the granulomas. More importantly, pulmonary fibrosis progressed for 3 months, and collagen fibers were detected by Masson trichrome staining. Further, inducible nitric oxide synthase (iNOS) was highly expressed within the alveolar space, and the fibrosis-mediator transforming growth factor beta (TGF-β) began to be expressed at 1 month. Hypoxia-inducible factor (HIF-1α) expression also increased, which aided in normalizing oxygen partial pressure. Discussion Although the transient fibrosis persisted for only 3 months, and the pulmonary structure resolved when the pathogen was cleard, this pulmonary fibrosis model for M. abscessus infection will provide a novel test platform for development of new drugs, regimens, and therapies.
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Affiliation(s)
- Shiu-Ju Yang
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan
| | - Chih-Hao Hsu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan
| | - Chi-Yun Lai
- Pathology Core Laboratory, National Health Research Institutes, Zhunan, Miaoli, Taiwan
| | - Pei-Chu Tsai
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan
| | - Yung-Deng Song
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan
| | - Chang-Ching Yeh
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan
| | - Yih-Yuan Chen
- Department of Biochemical Science and Technology, National Chiayi University, Chia-Yi, Taiwan
| | - Horng-Yunn Dou
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, Taiwan
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3
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Rabinovitz R, Eynan M. CNS-oxygen toxicity and blood glucose levels in MnSOD enzyme knockdown mice. Respir Physiol Neurobiol 2023; 316:104122. [PMID: 37481014 DOI: 10.1016/j.resp.2023.104122] [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: 05/27/2023] [Revised: 07/04/2023] [Accepted: 07/18/2023] [Indexed: 07/24/2023]
Abstract
Many studies have been conducted in the search for the mechanism underlying CNS-oxygen toxicity (OT), which may be fatal when diving with a closed-circuit apparatus. We investigated the influence of hyperbaric oxygen (HBO) on blood glucose level (BGL) in Mn-superoxide dismutase (SOD2) knockdown mice regarding CNS-OT in particular under stress conditions such as hypoglycemia or hyperglycemia. Two groups of mice were used: SOD2 knockdown (Heterozygous, HET) mice and their WT family littermates. Animals were exposed to HBO from 2 up to 5 atmosphere absolute (ATA). Blood samples were drawn before and after each exposure for measurement of BGL. The mice were sacrificed following the final exposure, which was at 5 ATA. We used RT-PCR and Western blot to measure levels of glucose transporter 1 (GLUT1) and hypoxia inducible factor (HIF)1a in the cortex and hippocampus. In the hypoglycemic condition, the HET mice were more sensitive to oxidative stress than the WT. In addition, following exposure to sub-toxic HBO, which does not induce CNS-OT, BGL were higher in the HET mice compared with the WT. The expression of mRNA of GLUT1 and HIF-1a decreased in the hippocampus in the HET mice, while the protein level decreased in the HET and WT following HBO exposure. The results suggest that the higher BGL following HBO exposure especially at SOD2 HET mice is in part due to reduction in GLUT1 as a consequence of lower HIF-1a expression. This may add part to the puzzle of the understanding the mechanism leading to CNS-OT.
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Affiliation(s)
- Ricarina Rabinovitz
- Israel Naval Medical Institute, Israel Defense Forces Medical Corps, Haifa, Israel
| | - Mirit Eynan
- Israel Naval Medical Institute, Israel Defense Forces Medical Corps, Haifa, Israel.
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Heinrichs-Caldas W, Ikert H, Almeida-Val VMF, Craig PM. Sex matters: Gamete-specific contribution of microRNA following parental exposure to hypoxia in zebrafish. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2023; 47:101090. [PMID: 37267726 DOI: 10.1016/j.cbd.2023.101090] [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: 01/25/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 06/04/2023]
Abstract
Oxygen availability varies among aquatic environments, and oxygen concentration has been demonstrated to drive behavioral, metabolic, and genetic adaptations in numerous aquatic species. MicroRNAs (miRNAs) are epigenetic modulators that act at the interface of the environment and the transcriptome and are known to drive plastic responses following environmental stressors. An area of miRNA that has remained underexplored is the sex specific action of miRNAs following hypoxia exposure and its effects as gene expression regulator in fishes. This study aimed to identify differences in mRNA and miRNA expression in the F1 generation of zebrafish (Danio rerio) at 1 hpf after either F0 parental male or female were exposed to 2 weeks of continuous (45 %) hypoxia. In general, F1 embryos at 1 hpf demonstrated differences in mRNA and miRNAs expression related to the stressor and to the specific sex of the F0 that was exposed to hypoxia. Bioinformatic pathway analysis of predicted miRNA:mRNA relationships indicated responses in known hypoxia signaling and mitochondrial bioenergetic pathways. This research demonstrates the importance of examining the specific male and female contributions to phenotypic variation in subsequent generations and provides evidence that there is both maternal and paternal contribution of miRNA through eggs and sperm.
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Affiliation(s)
- Waldir Heinrichs-Caldas
- LEEM - Laboratório de Ecofisiologia e Evolução Molecular, Instituto Nacional de Pesquisas da Amazônia, Campus I, Manaus, Amazonas, Brazil.
| | - Heather Ikert
- Department of Biology, University of Waterloo, 200 University Ave. W., Waterloo N2L 3G1, Ontario, Canada
| | - Vera Maria Fonseca Almeida-Val
- LEEM - Laboratório de Ecofisiologia e Evolução Molecular, Instituto Nacional de Pesquisas da Amazônia, Campus I, Manaus, Amazonas, Brazil
| | - Paul M Craig
- Department of Biology, University of Waterloo, 200 University Ave. W., Waterloo N2L 3G1, Ontario, Canada
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Liu J, Ge Z, Jiang X, Zhang J, Sun J, Mao X. A comprehensive review of natural products with anti-hypoxic activity. Chin J Nat Med 2023; 21:499-515. [PMID: 37517818 DOI: 10.1016/s1875-5364(23)60410-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Indexed: 08/01/2023]
Abstract
Natural products exhibit substantial impacts in the field of anti-hypoxic traetment. Hypoxia can cause altitude sickness and other negative effect on the body. Headache, coma, exhaustion, vomiting and, in severe cases, death are some of the clinical signs. Currently, hypoxia is no longer just a concern in plateau regions; it is also one of the issues that can not be ignored by urban residents. This review covered polysaccharides, alkaloids, saponins, flavonoids, peptides and traditional Chinese compound prescriptions as natural products to protect against hypoxia. The active ingredients, effectiveness and mechanisms were discussed. The related anti-hypoxic mechanisms involve increasing the hemoglobin (HB) content, glycogen content and adenosine triphosphate (ATP) content, removing excessive reactive oxygen species (ROS), reducing lipid peroxidation, regulating the levels of related enzymes in cells, protecting the structural and functional integrity of the mitochondria and regulating the expression of apoptosis-related genes. These comprehensive summaries are beneficial to anti-hypoxic research and provide useful information for the development of anti-hypoxic products.
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Affiliation(s)
- Juncai Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Zhen Ge
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Xiao Jiang
- Medical College, Qingdao Binhai University, Qingdao 266555, China
| | - Jingjing Zhang
- Medical College, Qingdao Binhai University, Qingdao 266555, China
| | - Jianan Sun
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Xiangzhao Mao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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Luo S, Jiang Y, Anfu Zheng, Zhao Y, Wu X, Li M, Du F, Chen Y, Deng S, Chen M, Li W, Li X, Gu L, Sun Y, Xiao Z, Shen J. Targeting hypoxia-inducible factors for breast cancer therapy: A narrative review. Front Pharmacol 2022; 13:1064661. [PMID: 36532768 PMCID: PMC9751339 DOI: 10.3389/fphar.2022.1064661] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 11/18/2022] [Indexed: 09/15/2023] Open
Abstract
Hypoxia-inducible factors (HIFs), central regulators for cells to adapt to low cellular oxygen levels, are often overexpressed and activated in breast cancer. HIFs modulate the primary transcriptional response of downstream pathways and target genes in response to hypoxia, including glycolysis, angiogenesis and metastasis. They can promote the development of breast cancer and are associated with poor prognosis of breast cancer patients by regulating cancer processes closely related to tumor invasion, metastasis and drug resistance. Thus, specific targeting of HIFs may improve the efficiency of cancer therapy. In this review, we summarize the advances in HIF-related molecular mechanisms and clinical and preclinical studies of drugs targeting HIFs in breast cancer. Given the rapid progression in this field and nanotechnology, drug delivery systems (DDSs) for HIF targeting are increasingly being developed. Therefore, we highlight the HIF related DDS, including liposomes, polymers, metal-based or carbon-based nanoparticles.
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Affiliation(s)
- Shuang Luo
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
- Department of Pharmacy, The Second People’s Hospital of Jiangyou, Mianyang, China
| | - Yu Jiang
- Department of Pharmacy, The People’s Hospital of Wusheng, Guang’an, China
| | - Anfu Zheng
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Yueshui Zhao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Xu Wu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Mingxing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Fukuan Du
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Yu Chen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Shuai Deng
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Meijuan Chen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Wanping Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Xiaobing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Li Gu
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Yuhong Sun
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
| | - Zhangang Xiao
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jing Shen
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
- Cell Therapy and Cell Drugs of Luzhou Key Laboratory, Luzhou, China
- South Sichuan Institute of Translational Medicine, Luzhou, China
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Vora M, Pyonteck SM, Popovitchenko T, Matlack TL, Prashar A, Kane NS, Favate J, Shah P, Rongo C. The hypoxia response pathway promotes PEP carboxykinase and gluconeogenesis in C. elegans. Nat Commun 2022; 13:6168. [PMID: 36257965 PMCID: PMC9579151 DOI: 10.1038/s41467-022-33849-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/05/2022] [Indexed: 12/31/2022] Open
Abstract
Actively dividing cells, including some cancers, rely on aerobic glycolysis rather than oxidative phosphorylation to generate energy, a phenomenon termed the Warburg effect. Constitutive activation of the Hypoxia Inducible Factor (HIF-1), a transcription factor known for mediating an adaptive response to oxygen deprivation (hypoxia), is a hallmark of the Warburg effect. HIF-1 is thought to promote glycolysis and suppress oxidative phosphorylation. Here, we instead show that HIF-1 can promote gluconeogenesis. Using a multiomics approach, we reveal the genomic, transcriptomic, and metabolomic landscapes regulated by constitutively active HIF-1 in C. elegans. We use RNA-seq and ChIP-seq under aerobic conditions to analyze mutants lacking EGL-9, a key negative regulator of HIF-1. We integrate these approaches to identify over two hundred genes directly and functionally upregulated by HIF-1, including the PEP carboxykinase PCK-1, a rate-limiting mediator of gluconeogenesis. This activation of PCK-1 by HIF-1 promotes survival in response to both oxidative and hypoxic stress. Our work identifies functional direct targets of HIF-1 in vivo, comprehensively describing the metabolome induced by HIF-1 activation in an organism.
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Affiliation(s)
- Mehul Vora
- The Waksman Institute, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Stephanie M Pyonteck
- The Waksman Institute, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Tatiana Popovitchenko
- The Waksman Institute, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Tarmie L Matlack
- The Waksman Institute, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Aparna Prashar
- The Department of Genetics, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Nanci S Kane
- The Waksman Institute, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - John Favate
- The Department of Genetics, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Premal Shah
- The Department of Genetics, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Christopher Rongo
- The Waksman Institute, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA. .,The Department of Genetics, Rutgers The State University of New Jersey, Piscataway, NJ, 08854, USA.
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Lee YM. RUNX Family in Hypoxic Microenvironment and Angiogenesis in Cancers. Cells 2022; 11:cells11193098. [PMID: 36231060 PMCID: PMC9564080 DOI: 10.3390/cells11193098] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/27/2022] [Accepted: 09/27/2022] [Indexed: 11/28/2022] Open
Abstract
The tumor microenvironment (TME) is broadly implicated in tumorigenesis, as tumor cells interact with surrounding cells to influence the development and progression of the tumor. Blood vessels are a major component of the TME and are attributed to the creation of a hypoxic microenvironment, which is a common feature of advanced cancers and inflamed premalignant tissues. Runt-related transcription factor (RUNX) proteins, a transcription factor family of developmental master regulators, are involved in vital cellular processes such as differentiation, proliferation, cell lineage specification, and apoptosis. Furthermore, the RUNX family is involved in the regulation of various oncogenic processes and signaling pathways as well as tumor suppressive functions, suggesting that the RUNX family plays a strategic role in tumorigenesis. In this review, we have discussed the relevant findings that describe the crosstalk of the RUNX family with the hypoxic TME and tumor angiogenesis or with their signaling molecules in cancer development and progression.
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Affiliation(s)
- You Mie Lee
- Vessel-Organ Interaction Research Center, VOICE (MRC), Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea
- Lab of Molecular Pathophysiology, College of Pharmacy, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea
- Correspondence: ; Tel.: +82-53-950-8566; Fax:+82-53-950-8557
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Sulfated galactoglucan impedes xenografted lung cancer cell growth by blocking angiogenesis via binding BMPRs. Carbohydr Polym 2022; 289:119412. [DOI: 10.1016/j.carbpol.2022.119412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/28/2022] [Accepted: 03/22/2022] [Indexed: 11/20/2022]
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10
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Guo M, Ji X, Liu J. Hypoxia and Alpha-Synuclein: Inextricable Link Underlying the Pathologic Progression of Parkinson's Disease. Front Aging Neurosci 2022; 14:919343. [PMID: 35959288 PMCID: PMC9360429 DOI: 10.3389/fnagi.2022.919343] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/22/2022] [Indexed: 11/13/2022] Open
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disease after Alzheimer's disease, with typical motor symptoms as the main clinical manifestations. At present, there are about 10 million patients with PD in the world, and its comorbidities and complications are numerous and incurable. Therefore, it is particularly important to explore the pathogenesis of PD and find possible therapeutic targets. Because the etiology of PD is complex, involving genes, environment, and aging, finding common factors is the key to identifying intervention targets. Hypoxia is ubiquitous in the natural environment and disease states, and it is considered to be closely related to the etiology of PD. Despite research showing that hypoxia increases the expression and aggregation of alpha-synuclein (α-syn), the most important pathogenic protein, there is still a lack of systematic studies on the role of hypoxia in α-syn pathology and PD pathogenesis. Considering that hypoxia is inextricably linked with various causes of PD, hypoxia may be a co-participant in many aspects of the PD pathologic process. In this review, we describe the risk factors for PD, and we discuss the possible role of hypoxia in inducing PD pathology by these risk factors. Furthermore, we attribute the pathological changes caused by PD etiology to oxygen uptake disorder and oxygen utilization disorder, thus emphasizing the possibility of hypoxia as a critical link in initiating or promoting α-syn pathology and PD pathogenesis. Our study provides novel insight for exploring the pathogenesis and therapeutic targets of PD.
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Affiliation(s)
- Mengyuan Guo
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Capital Medical University, Beijing, China
| | - Xunming Ji
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Capital Medical University, Beijing, China
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Xunming Ji
| | - Jia Liu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Capital Medical University, Beijing, China
- *Correspondence: Jia Liu
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Predictive Value of Heat-Shock Protein Gene Expression on Severe Neonatal Hypoxic-Ischemic Encephalopathy. Diagnostics (Basel) 2022; 12:diagnostics12040981. [PMID: 35454029 PMCID: PMC9030968 DOI: 10.3390/diagnostics12040981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/02/2022] [Accepted: 04/12/2022] [Indexed: 11/16/2022] Open
Abstract
This study aims to evaluate significant gene expression in severe hypoxic ischemic encephalopathy (HIE) in newborns, which can be used as a predictable measure for high-risk HIE infants. The study prospectively recruited 77 inborn near-term or term HIE newborns between January 2018 and December 2020. We measured six different genes within 6 h of life among the HIE infants and compared the gene levels between the mild- and severe-HIE groups. Among these, 64 HIE infants (83.1%) did not receive therapeutic hypothermia (TH) because they were categorized as mild HIE, and the 13 remaining (16.9%) infants were categorized as ≥ moderate-HIE group and received TH. More abnormal MRI findings, seizure, and use of anti-convulsant were more found in the ≥ moderate = HIE group along with longer mechanical ventilation days and hospitalization. Heat-shock protein 70 family 1 A (HSPA1A) and serpin family H member 1 (SERPINH1) genes, which encode heat-shock protein (HSP) 70 and 47, respectively, were significantly elevated in the ≥ moderate-HIE, seizure, and abnormal MRI groups. HSP 70 and 47 were significantly elevated in the severe-HIE group, possibly playing protective roles in inhibiting exacerbated neuroinflammation and maintaining a cellular homeostasis. At 18–24 months, ≥ moderate-HIE group manifested a significant language delay.
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Mastronikolis S, Adamopoulou M, Tsiambas E, Makri OΕ, Pagkalou M, Thomopoulou VK, Georgakopoulos CD. Vascular Endothelial Growth Factor expression patterns in non- Human Papillomavirus - related pterygia: an experimental study on cell spot arrays digital analysis. Curr Eye Res 2022; 47:1003-1008. [PMID: 35322737 DOI: 10.1080/02713683.2022.2058018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
PURPOSE The role of angiogenic factors -such as vascular endothelial growth factor (VEGF) - in development and progression of pterygia lesions remains under investigation. In the current study, we analyzed VEGF protein expression in a series of pterygia and normal conjunctiva epithelia. METHODS Using a liquid based cytology assay, thirty (n = 30) cell specimens were obtained by applying a smooth scraping on conjunctiva epithelia and fixed accordingly. None of them had a history of Human Papillomavirus (HPV) infection. Similarly, the same process was applied also in normal conjunctiva epithelia (n = 10; control group). We constructed five (n = 5) slides each containing eight (n = 8) cell spots. An immunocytochemistry (ICC) assay was implemented. Digital image analysis was also performed for evaluating objectively the corresponding immunostaining intensity levels. RESULTS All the examined pterygia cell samples over expressed the marker. High staining intensity levels were detected in 15/30 (50%), whereas the rest 15/30 (50%) demonstrated moderate expression. Overall VEGF expression was statistically significantly higher in pterygia compared to normal conjunctiva epithelia (p=.0001). Concerning the other parameters, VEGF protein expression did not associate with the gender of the patients (p = 0.518), the presence of recurrent lesion (p = 0.311), the anatomical location (p = 0.191) or with their morphology (p = 0.316). Interestingly, the recurrent lesions demonstrated the highest levels of VEGF expression. CONCLUSIONS VEGF over expression is a frequent event in pterygia playing a potentially central molecular role in the progression of the lesion. Cell spot array analysis -based on liquid cytology- seems to be an innovative, easy to use technique for analyzing a broad variety of molecules in multiple specimens on the same slide by applying different ICC assays.
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Affiliation(s)
| | - Maria Adamopoulou
- Department of Biomedical Sciences, University of West Attica, Athens, Greece
| | | | - Olga Ε Makri
- Department of Ophthalmology, Medical School, University of Patras, Rion - Achaia, Greece
| | - Marina Pagkalou
- Department of Chemistry, University of Crete, Voutes - Heraklion, Greece
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Jang B, Song HK, Hwang J, Lee S, Park E, Oh A, Hwang ES, Sung JY, Kim YN, Park K, Lee YM, Oh ES. Shed syndecan-2 enhances colon cancer progression by increasing cooperative angiogenesis in the tumor microenvironment. Matrix Biol 2022; 107:40-58. [DOI: 10.1016/j.matbio.2022.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/12/2022] [Accepted: 02/02/2022] [Indexed: 12/24/2022]
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14
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Pang K, Lennikov A, Yang M. Hypoxia adaptation in the cornea: Current animal models and underlying mechanisms. Animal Model Exp Med 2021; 4:300-310. [PMID: 34977481 PMCID: PMC8690994 DOI: 10.1002/ame2.12192] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/03/2021] [Accepted: 11/08/2021] [Indexed: 12/14/2022] Open
Abstract
The cornea is an avascular, transparent tissue that is essential for visual function. Any disturbance to the corneal transparency will result in a severe vision loss. Due to the avascular nature, the cornea acquires most of the oxygen supply directly or indirectly from the atmosphere. Corneal tissue hypoxia has been noticed to influence the structure and function of the cornea for decades. The etiology of hypoxia of the cornea is distinct from the rest of the body, mainly due to the separation of cornea from the atmosphere, such as prolonged contact lens wearing or closed eyes. Corneal hypoxia can also be found in corneal inflammation and injury when a higher oxygen requirement exceeds the oxygen supply. Systemic hypoxic state during lung diseases or high altitude also leads to corneal hypoxia when a second oxygen consumption route from aqueous humor gets blocked. Hypoxia affects the cornea in multiple aspects, including disturbance of the epithelium barrier function, corneal edema due to endothelial dysfunction and metabolism changes in the stroma, and thinning of corneal stroma. Cornea has also evolved mechanisms to adapt to the hypoxic state initiated by the activation of hypoxia inducible factor (HIF). The aim of this review is to introduce the pathology of cornea under hypoxia and the mechanism of hypoxia adaptation, to discuss the current animal models used in this field, and future research directions.
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Affiliation(s)
- Kunpeng Pang
- Harvard Medical School Department of OphthalmologySchepens Eye Research InstituteMassachusetts Eye and EarBostonMassachusettsUSA
- Department of OphthalmologyQilu Hospital of Shandong UniversityQingdaoChina
| | - Anton Lennikov
- Harvard Medical School Department of OphthalmologySchepens Eye Research InstituteMassachusetts Eye and EarBostonMassachusettsUSA
| | - Menglu Yang
- Harvard Medical School Department of OphthalmologySchepens Eye Research InstituteMassachusetts Eye and EarBostonMassachusettsUSA
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15
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Janaszak-Jasiecka A, Siekierzycka A, Płoska A, Dobrucki IT, Kalinowski L. Endothelial Dysfunction Driven by Hypoxia-The Influence of Oxygen Deficiency on NO Bioavailability. Biomolecules 2021; 11:biom11070982. [PMID: 34356605 PMCID: PMC8301841 DOI: 10.3390/biom11070982] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/25/2021] [Accepted: 07/02/2021] [Indexed: 12/12/2022] Open
Abstract
Cardiovascular diseases (CVDs) are the leading cause of death worldwide. The initial stage of CVDs is characterized by endothelial dysfunction, defined as the limited bioavailability of nitric oxide (NO). Thus, any factors that interfere with the synthesis or metabolism of NO in endothelial cells are involved in CVD pathogenesis. It is well established that hypoxia is both the triggering factor as well as the accompanying factor in cardiovascular disease, and diminished tissue oxygen levels have been reported to influence endothelial NO bioavailability. In endothelial cells, NO is produced by endothelial nitric oxide synthase (eNOS) from L-Arg, with tetrahydrobiopterin (BH4) as an essential cofactor. Here, we discuss the mechanisms by which hypoxia affects NO bioavailability, including regulation of eNOS expression and activity. What is particularly important is the fact that hypoxia contributes to the depletion of cofactor BH4 and deficiency of substrate L-Arg, and thus elicits eNOS uncoupling-a state in which the enzyme produces superoxide instead of NO. eNOS uncoupling and the resulting oxidative stress is the major driver of endothelial dysfunction and atherogenesis. Moreover, hypoxia induces impairment in mitochondrial respiration and endothelial cell activation; thus, oxidative stress and inflammation, along with the hypoxic response, contribute to the development of endothelial dysfunction.
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Affiliation(s)
- Anna Janaszak-Jasiecka
- Department of Medical Laboratory Diagnostics—Fahrenheit Biobank BBMRI.pl, Medical University of Gdansk, 80-211 Gdansk, Poland; (A.J.-J.); (A.S.); (A.P.)
- Biobanking and Biomolecular Resources Research Infrastructure Poland (BBMRI.pl), 80-211 Gdansk, Poland
| | - Anna Siekierzycka
- Department of Medical Laboratory Diagnostics—Fahrenheit Biobank BBMRI.pl, Medical University of Gdansk, 80-211 Gdansk, Poland; (A.J.-J.); (A.S.); (A.P.)
- Laboratory of Trace Elements Neurobiology, Institute of Pharmacology, Polish Academy of Sciences, 31-343 Krakow, Poland
| | - Agata Płoska
- Department of Medical Laboratory Diagnostics—Fahrenheit Biobank BBMRI.pl, Medical University of Gdansk, 80-211 Gdansk, Poland; (A.J.-J.); (A.S.); (A.P.)
- Biobanking and Biomolecular Resources Research Infrastructure Poland (BBMRI.pl), 80-211 Gdansk, Poland
| | - Iwona T. Dobrucki
- University of Illinois at Urbana-Champaign Beckman Institute for Advanced Science and Technology, 405 N Mathews Ave, MC-251, Urbana, IL 61801, USA;
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Leszek Kalinowski
- Department of Medical Laboratory Diagnostics—Fahrenheit Biobank BBMRI.pl, Medical University of Gdansk, 80-211 Gdansk, Poland; (A.J.-J.); (A.S.); (A.P.)
- Biobanking and Biomolecular Resources Research Infrastructure Poland (BBMRI.pl), 80-211 Gdansk, Poland
- BioTechMed Centre, Department of Mechanics of Materials and Structures, Gdansk University of Technology, 80-233 Gdansk, Poland
- Correspondence:
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16
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Oguzoglu AS, Senol N, Asci H, Erzurumlu Y, Gulle K, Savran M, Sadef M, Acar BG, Goksel HM. Pregabalin Protects Brain Tissue from Subarachnoid Hemorrhage by Enhancing HIF-1α/eNOS Signaling and VEGF Production. World Neurosurg 2021; 152:e713-e720. [PMID: 34129987 DOI: 10.1016/j.wneu.2021.06.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 01/25/2023]
Abstract
OBJECTIVE We investigated the effects of different doses of pregabalin on the pathophysiologic changes in early brain injury after subarachnoid hemorrhage (SAH) in rats. METHODS Thirty-eight Wistar albino rats were divided into 4 groups: control (n = 8), SAH (n = 10), SAH plus 30 mg/kg/day of pregabalin (n = 10), and SAH plus 60 mg/kg/day of pregabalin (n = 10). SAH was induced with 0.3 mL of autologous blood injected to the cisterna magna of rats. Pregabalin was administered intraperitoneally. Oxidative stress markers, mRNA expression of endothelial nitric oxide synthase, hypoxia-inducible factor-1α, and vascular endothelial growth factor, and histopathological changes were evaluated. RESULTS Pregabalin increased mRNA expression of endothelial nitric oxide synthase, hypoxia-inducible factor-1α, and vascular endothelial growth factor in a dose-dependent manner. Significant improvement in the histopathological parameters was observed at 60 mg/kg, including a decrease in diffuse hemorrhagic areas, edema and apoptotic bodies in the associated cortical area, evident vacuolization in the hippocampal area, and apoptotic bodies. However, these improvements were not observed with the lower dose (30 mg/kg). In contrast, the antioxidant effect was greater with 30 mg/kg of pregabalin than with 60 mg/kg. CONCLUSIONS Although the antioxidant effect was significant with the lower dose of pregabalin, the anti-inflammatory effects via vasodilatation were more marked with the higher dose. Significant improvements in the histopathological changes were observed with the higher dose of pregabalin. The dose-dependent effects of pregabalin on SAH should be evaluated in animal studies as a function of time and in the acute and chronic phases.
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Affiliation(s)
- Ali Serdar Oguzoglu
- Department of Neurosurgery, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
| | - Nilgun Senol
- Department of Neurosurgery, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey.
| | - Halil Asci
- Department of Medical Pharmacology, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
| | - Yalcin Erzurumlu
- Department of Biochemistry, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
| | - Kanat Gulle
- Departments of Histology and Embryology, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
| | - Mehtap Savran
- Department of Medical Pharmacology, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
| | - Mustafa Sadef
- Department of Neurosurgery, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
| | - Berivan Gunduru Acar
- Department of Medical Pharmacology, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
| | - Hakan Murat Goksel
- Department of Neurosurgery, Suleyman Demirel University, Faculty of Medicine, Isparta, Turkey
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17
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Dozortsev DI, Diamond MP. Luteinizing hormone-independent rise of progesterone as the physiological trigger of the ovulatory gonadotropins surge in the human. Fertil Steril 2021; 114:191-199. [PMID: 32741458 DOI: 10.1016/j.fertnstert.2020.06.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/08/2020] [Accepted: 06/09/2020] [Indexed: 02/09/2023]
Abstract
The current ovarian cycle paradigm postulates that ovulation is triggered by a critically sustained elevation of estradiol. However, an in-depth look into the published data reveals considerable uncertainty about the relative roles of progesterone and estradiol in the ovulation process.This review provides compelling evidences that the role of estradiol in ovulation has been misinterpreted and that the true physiological trigger of ovulation is a luteinizing hormone-independent preovulatory progesterone surge in the circulation to approximately 0.5 ng/mL. Furthermore, the current work reconciles the ability of progesterone to trigger ovulation, with its well-established ability to block ovulation during pregnancy, or when administered in the form of a synthetic progestin in birth control formulations and with experimental data that estradiol benzoate triggers ovulation in the complete absence of progesterone.
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18
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Zhang CH, Sheng JQ, Xie WH, Luo XQ, Xue YN, Xu GL, Chen C. Mechanism and Basis of Traditional Chinese Medicine Against Obesity: Prevention and Treatment Strategies. Front Pharmacol 2021; 12:615895. [PMID: 33762940 PMCID: PMC7982543 DOI: 10.3389/fphar.2021.615895] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 01/26/2021] [Indexed: 12/13/2022] Open
Abstract
In the last few decades, the incidences of obesity and related metabolic disorders worldwide have increased dramatically. Major pathophysiology of obesity is termed "lipotoxicity" in modern western medicine (MWM) or "dampness-heat" in traditional Chinese medicine (TCM). "Dampness-heat" is a very common and critically important syndrome to guild clinical treatment in TCM. However, the pathogenesis of obesity in TCM is not fully clarified, especially by MWM theories compared to TCM. In this review, the mechanism underlying the action of TCM in the treatment of obesity and related metabolic disorders was thoroughly discussed, and prevention and treatment strategies were proposed accordingly. Hypoxia and inflammation caused by lipotoxicity exist in obesity and are key pathophysiological characteristics of "dampness-heat" syndrome in TCM. "Dampness-heat" is prevalent in chronic low-grade systemic inflammation, prone to insulin resistance (IR), and causes variant metabolic disorders. In particular, the MWM theories of hypoxia and inflammation were applied to explain the "dampness-heat" syndrome of TCM, and we summarized and proposed the pathological path of obesity: lipotoxicity, hypoxia or chronic low-grade inflammation, IR, and metabolic disorders. This provides significant enrichment to the scientific connotation of TCM theories and promotes the modernization of TCM.
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Affiliation(s)
- Chang-Hua Zhang
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Jun-Qing Sheng
- College of Life Science, Nanchang University, Nanchang, China
| | - Wei-Hua Xie
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Xiao-Quan Luo
- Experimental Animal Science and Technology Center of TCM, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Ya-Nan Xue
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Guo-Liang Xu
- Research Center for Differentiation and Development of Basic Theory of TCM, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Chen Chen
- School of Biomedical Sciences, University of Queensland, Brisbane, QLD, Australia
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19
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Cherevatenko RF, Antsiferov OV, Skachilova SY, Pokrovsky MV, Gureev VV, Banchuk II, Banchuk AY, Golubinskaya MI, Syromyatnikova AA, Rozhkov IS, Mostovykh AA. THE SEARCH FOR NEUROPROTECTIVE COMPOUNDS AMONG NEW ETHYLTHIADIAZOLE DERIVATIVES. PHARMACY & PHARMACOLOGY 2021. [DOI: 10.19163/2307-9266-2019-8-4-263-272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The aim of the study is to search compounds with neuroprotective properties among new ethylthiadiazole derivatives in simulated traumatic brain injury.Materials and methods. The experiment was carried out on 78 white male rats 270±20 g line “Wistar” 5–6 months of age and 120 outbred sexually mature mice weighing 20±2 grams. The article describes the search for compounds with neuroprotective properties among new ethylthiadiazole derivatives under the codes LKHT 4–15, LKHT 10–18, LKHT 11–18, and LKHT 12–18 in experimental traumatic brain injury in rats. Acute toxicity of the compounds was studied. Pharmacological screening was performed using behavioral and neurological research methods. The McGraw stroke score scale modified by I.V. Gannushkina and the mNSS psychometric scale were used in the study. The open field and Rota-rod tests were used to assess the behavioral status of the animals.Results. The compound-LKHT 12–18 at a dose of 50 mg/kg was detected as a leader. In pharmacological correction of pathology, this compound had the lowest percentage of fatality among the studied compounds (8%), the severity of neurological deficit was significantly reduced, the lowest scores and a higher level of motor activity of the limbs were registered. The number of rearing in the group of animals receiving the compound LKHT 12–18 at the dose of 50 mg/kg increased by 1.5 times, statistically significant (p<0.05) in comparison with the control group. Based on the results of the “Rota-rod” test, the total time of holding animals on the rod for 3 attempts was statistically significantly different in the groups administered with LKHT 12–18 derivatives (1.5 times longer) at the dose of 50 mg/kg compared with the control (p<0.05).Conclusion. Based on the results obtained in this study, it is planned to study in more detail the compound LKHT 12–18 at the dose of 50 mg/kg.
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Affiliation(s)
| | | | - S. Y. Skachilova
- Russian Scientific Center for the Safety of Biologically Active Substances
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20
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Ban HS, Uto Y, Nakamura H. Hypoxia-inducible factor (HIF) inhibitors: a patent survey (2016-2020). Expert Opin Ther Pat 2021; 31:387-397. [PMID: 33455469 DOI: 10.1080/13543776.2021.1874345] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Introduction: Hypoxia-inducible factor (HIF) is a master regulator of oxygen homeostasis. The increased expression of genes targeted by HIF is associated with many human diseases, including ischemic cardiovascular disease, stroke, chronic lung disease, and cancer.Areas covered: This patent survey summarizes the information about patented HIF inhibitors over the last 5 years.Expert opinion: HIF inhibitors have shown promise for the treatment of hypoxic pulmonary hypertension, a circadian rhythm disorder, calcific aortic valve disease, cerebrovascular accident, and heterotopic ossification. In addition, HIF-2α inhibitors can be used for the treatment or prevention of iron overload disorders, Crohn's disease, ulcerative colitis, and thyroid eye disease, or to improve muscle generation and repair. PT2385 completed phase I clinical trials for the treatment of clear cell renal cell carcinoma. It exerted a higher synergistic inhibitory effect on tumor growth in combination with anti-PD-1 antibody, in comparison with each treatment alone, indicating that effective immunotherapy for solid tumors counteracts of the immunosuppression induced by hypoxia. Therefore, considering the effects of hypoxia on cancer cells, stromal cells, and effector immune cells, it is important to develop inhibitors of molecular pathways activated by hypoxia for successful treatments.
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Affiliation(s)
- Hyun Seung Ban
- Biomedical Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Yoshikazu Uto
- ASCA Company, Daiichi Sankyo Co., Ltd., Tokyo, Japan
| | - Hiroyuki Nakamura
- cLaboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
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21
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Ren JX, Sun X, Yan XL, Guo ZN, Yang Y. Ferroptosis in Neurological Diseases. Front Cell Neurosci 2020; 14:218. [PMID: 32754017 PMCID: PMC7370841 DOI: 10.3389/fncel.2020.00218] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/19/2020] [Indexed: 12/11/2022] Open
Abstract
Ferroptosis is mechanism for non-apoptotic, iron-dependent, oxidative cell death that is characterized by glutathione consumption and lipid peroxides accumulation. Ferroptosis is crucially involved in neurological diseases, including neurodegeneration, stroke and neurotrauma. This review provides detailed discussions of the ferroptosis mechanisms in these neurological diseases. Moreover, it summarizes recent drugs that target ferroptosis for neurological disease treatment. Furthermore, it compares the differences and relationships among the various cell death mechanisms involved in neurological diseases. Elucidating the ferroptosis role in the brain can improve the understanding of neurological disease mechanism and provide potential prevention and treatment interventions for acute and chronic neurological diseases.
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Affiliation(s)
- Jia-Xin Ren
- Department of Neurology, The First Hospital of Jilin University, Changchun, China.,School of Clinical Medicine, Jilin University, Changchun, China
| | - Xin Sun
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Xiu-Li Yan
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Zhen-Ni Guo
- Clinical Trial and Research Center for Stroke, Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Yi Yang
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
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22
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Bartoszewska S, Collawn JF. Unfolded protein response (UPR) integrated signaling networks determine cell fate during hypoxia. Cell Mol Biol Lett 2020; 25:18. [PMID: 32190062 PMCID: PMC7071609 DOI: 10.1186/s11658-020-00212-1] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 02/26/2020] [Indexed: 02/06/2023] Open
Abstract
During hypoxic conditions, cells undergo critical adaptive responses that include the up-regulation of hypoxia-inducible proteins (HIFs) and the induction of the unfolded protein response (UPR). While their induced signaling pathways have many distinct targets, there are some important connections as well. Despite the extensive studies on both of these signaling pathways, the exact mechanisms involved that determine survival versus apoptosis remain largely unexplained and therefore beyond therapeutic control. Here we discuss the complex relationship between the HIF and UPR signaling pathways and the importance of understanding how these pathways differ between normal and cancer cell models.
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Affiliation(s)
- Sylwia Bartoszewska
- Department of Inorganic Chemistry, Medical University of Gdansk, Gdansk, Poland
| | - James F. Collawn
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, USA
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23
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Hou G, Chen H, Yin Y, Pan Y, Zhang X, Jia F. MEL Ameliorates Post-SAH Cerebral Vasospasm by Affecting the Expression of eNOS and HIF1α via H19/miR-138/eNOS/NO and H19/miR-675/HIF1α. MOLECULAR THERAPY. NUCLEIC ACIDS 2019; 19:523-532. [PMID: 31927306 PMCID: PMC6953775 DOI: 10.1016/j.omtn.2019.12.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/29/2019] [Accepted: 12/02/2019] [Indexed: 11/26/2022]
Abstract
Melatonin (MEL) has been demonstrated to exert a protective effect against subarachnoid hemorrhage (SAH), and nitric oxide (NO) has been shown to play an important role in the pathogenesis of vasospasm. This study aims to explore the underlying molecular mechanisms of MEL in the control of vasospasm following SAH. MEL administration attenuates SAH-induced vasospasm and neurobehavioral deficits. Expressions of H19, eNOS, and miR-675 are low in the SAH group, while expressions of miR-138 and HIF1α are high in the SAH group. Also, MEL treatment upon SAH rats completely restores the dysregulation of H19, eNOS, miR-675, miR-138, and HIF1α to their normal levels. Moreover, MEL dose dependently increases the luciferase activity of H19 promoter and hence the expression of H19. Additionally, H19 directly targets miR-675 and miR-138 to increase miR-675 expression and inhibit miR-138 expression. As virtual target genes of miR-675 and miR-138, respectively, HIF1α and eNOS are also regulated by the treatment with MEL. In particular, MEL treatment increases the expression of miR-675 and eNOS level while decreasing the expression of miR-138 and HIF1α in a dose dependent manner. Our study found that MEL ameliorates post-SAH vasospasm by regulating the expression of eNOS and HIF1α via the H19/miR-138/eNOS/NO and H19/miR-675/HIF1α signaling pathways.
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Affiliation(s)
- Guoqiang Hou
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Hongjin Chen
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Yuhua Yin
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Yaohua Pan
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China.
| | - Xiaohua Zhang
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China.
| | - Feng Jia
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China.
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24
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Hong J, Wuest TR, Min Y, Lin PC. Oxygen Tension Regulates Lysosomal Activation and Receptor Tyrosine Kinase Degradation. Cancers (Basel) 2019; 11:cancers11111653. [PMID: 31717697 PMCID: PMC6896048 DOI: 10.3390/cancers11111653] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/18/2019] [Accepted: 10/22/2019] [Indexed: 12/31/2022] Open
Abstract
Oxygen sensing is crucial for adaptation to variable habitats and physiological conditions. Low oxygen tension, or hypoxia, is a common feature of solid tumors, and hypoxic tumors are often more aggressive and resistant to therapy. Here we show that, in cultured mammalian cells, hypoxia suppressed lysosomal acidification/activation and receptor tyrosine kinase (RTK) degradation. Hypoxia down-regulated mTORc1, reducing its ability to activate transcription factor EB (TFEB), a master regulator of V-ATPase, the lysosomal proton pump. Hypoxia prevented epidermal growth factor receptor (EGFR) degradation in tumor tissues, whereas activation of lysosomes enhanced tumor cell response to anti-EGFR treatment. Our results link oxygen tension and lysosomal activity, provide a molecular explanation of the malignant phenotype associated with hypoxic tumors, and suggest activation of lysosomes may provide therapeutic benefit in RTK-targeted cancer therapy.
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25
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Zinc causes the death of hypoxic astrocytes by inducing ROS production through mitochondria dysfunction. BIOPHYSICS REPORTS 2019. [DOI: 10.1007/s41048-019-00098-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Abstract
Cerebral ischemia triggers a cascade of events that contribute to ischemic brain damages. Zinc release and accumulation has been shown to lead to brain cell death following cerebral ischemia. However, the mechanism underlying remains to be elucidated. Our recently published work showed that suppression of mitochondrial-derived reactive oxygen species (ROS) production significantly reduced ischemic stroke related brain damage within 6 h. Herein, we investigated the relationship between zinc accumulation and mitochondrial-derived ROS production in astrocytes after 3-h hypoxia. We found that inhibition of mitochondrial-derived ROS significantly decreased total amount of ROS generation and cell death in primary astrocytes during hypoxia when zinc was overload. In contrast, the inhibition of NADPH oxidase-derived ROS had less of an effect. Our results also showed that zinc and mitochondria were colocalized in hypoxic astrocytes. Moreover, extracellular zinc addition caused zinc accumulation in the mitochondria and decreased mitochondrial membrane potential, leading to mitochondria dysfunction. These findings provide a novel mechanism that zinc accumulation contributes to hypoxia-induced astrocytes death by disrupting mitochondria function, following cerebral ischemia.
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Hydroxylation of protein constituents of the human translation system: structural aspects and functional assignments. Future Med Chem 2019; 11:357-369. [PMID: 30802140 DOI: 10.4155/fmc-2018-0317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
During the current decade, data on the post-translational hydroxylation of specific amino acid residues of some ribosomal proteins and translation factors in both eukaryotes and eubacteria have accumulated. The reaction is catalyzed by dedicated oxygenases (so-called ribosomal oxygenases), whose action is impaired under hypoxia conditions. The modification occurs at amino acid residues directly involved in the formation of the main functional sites of ribosomes and factors. This review summarizes currently available data on the specific hydroxylation of protein constituents of eukaryotic and eubacterial translation systems with a special emphasis on the human system, as well as on the links between hypoxia impacts on the operation of ribosomal oxygenases, the functioning of the translational apparatus and human health problems.
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27
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Jiang H, Zhang S, Song T, Guan X, Zhang R, Chen X. Trichostatin a Protects Dendritic Cells Against Oxygen-Glucose Deprivation via the SRSF3/PKM2/Glycolytic Pathway. Front Pharmacol 2018; 9:612. [PMID: 29942258 PMCID: PMC6004525 DOI: 10.3389/fphar.2018.00612] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 05/22/2018] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells (DCs) are important to the immune system and are frequently recruited to hypoxic regions, especially during acute myocardial infarction (AMI). Emerging data indicate that histone deacetylase (HDAC) inhibitors possess immunomodulatory functions. We previously showed in a rat model of AMI that the HDAC inhibitor TSA improved tissue repair, and this was accompanied by increased DC infiltration in the infarct region, suggesting an important role of TSA in modulating DC functions. To study the potential modulatory effect of TSA on DCs, we exploited an in vitro model of hypoxia and glucose deprivation. Culturing of DCs in the presence of 200 nM TSA improved DC survival under hypoxia and glucose deprivation. However, on a phenotypic level, TSA induced the expression of the DC co-stimulatory molecules CD80 and CD86, decreased FITC-dextran uptake, and facilitated DC migration. Moreover, TSA altered cytokine secretion by reducing the pro-inflammatory cytokines IL-1β, IL-10, IL-12, and TGF-β. Furthermore, TSA treatment enhanced HIF-1α-dependent glycolytic gene expression and increased pyruvate kinase M2 by upregulating SRSF3. These results suggest that by TSA alters important DC functions under hypoxia and glucose deprivation, and that TSA is critical for DC function by modulating SRSF3-PKM2-dependent glycolytic pathways.
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Affiliation(s)
- Hongyun Jiang
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Siwei Zhang
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Tongtong Song
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Xin Guan
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Ruojin Zhang
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Xia Chen
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, China
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28
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Yang Y, Fu Q, Wang X, Liu Y, Zeng Q, Li Y, Gao S, Bao L, Liu S, Gao D, Dunham R, Liu Z. Comparative transcriptome analysis of the swimbladder reveals expression signatures in response to low oxygen stress in channel catfish, Ictalurus punctatus. Physiol Genomics 2018; 50:636-647. [PMID: 29799804 DOI: 10.1152/physiolgenomics.00125.2017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Channel catfish is the leading aquaculture species in the US, and one of the reasons for its application in aquaculture is its relatively high tolerance against hypoxia. However, hypoxia can still cause huge economic losses to the catfish industry. Studies on hypoxia tolerance, therefore, are important for aquaculture. Fish swimbladder has been considered as an accessory respiration organ surrounded by a dense capillary countercurrent exchange system. In this regard, we conducted RNA-Seq analysis with swimbladder samples of catfish under hypoxic and normal conditions to determine if swimbladder was responsive to low oxygen treatment and to reveal genes, their expression patterns, and pathways involved in hypoxia responses in catfish. A total of 155 differentially expressed genes (DEGs) were identified from swimbladder of adult catfish, whereas a total of 2,127 DEGs were identified from swimbladder of fingerling catfish under hypoxic condition as compared with untreated controls. Subsequent pathway analysis revealed that many DEGs under hypoxia were involved in HIF signaling pathway ( nos2, eno2, camk2d2, prkcb, cdkn1a, eno1, and tfrc), MAPK signaling pathway (voltage-dependent calcium channel subunit genes), PI3K/Akt/mTOR signaling pathway ( itga6, g6pc, and cdkn1a), Ras signaling pathway ( efna3 and ksr2), and signaling by VEGF ( fn1, wasf3, and hspb1) in catfish swimbladder. This study provided insights into regulation of gene expression and their involved gene pathways in catfish swimbladder in response to low oxygen stresses.
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Affiliation(s)
- Yujia Yang
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Qiang Fu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama.,Marine Science and Engineering College, Qingdao Agricultural University , Qingdao , China
| | - Xiaozhu Wang
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Yang Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Qifan Zeng
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Yun Li
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Sen Gao
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Lisui Bao
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Shikai Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Dongya Gao
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Rex Dunham
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University , Auburn, Alabama
| | - Zhanjiang Liu
- Department of Biology, College of Art and Sciences, Syracuse University , Syracuse, New York
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29
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Liu LL, Li D, He YL, Zhou YZ, Gong SH, Wu LY, Zhao YQ, Huang X, Zhao T, Xu L, Wu KW, Li MG, Zhu LL, Fan M. miR-210 protects renal cell against hypoxia-induced apoptosis by targeting HIF-1 alpha. Mol Med 2017; 23:258-271. [PMID: 29387863 DOI: 10.2119/molmed.2017.00013] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 08/21/2017] [Indexed: 01/01/2023] Open
Abstract
The kidney is vulnerable to hypoxia-induced injury. One of the mechanisms underlying this phenomenon is cell apoptosis triggered by hypoxia-inducible factor-1-alpha (HIF-1α) activation. MicroRNA-210 (miR-210) is known to be induced by HIF-1α and can regulate various pathological processes, but its role in hypoxic kidney injury remains unclear. Here, in both kinds of rat systemic hypoxia and local kidney hypoxia models, we found miR-210 levels were upregulated significantly in injured kidney, especially in renal tubular cells. A similar increase was observed in hypoxia-treated human renal tubular HK-2 cells. We also verified that miR-210 can directly suppress HIF-1α expression by targeting the 3' untranslated region (UTR) of HIF-1α mRNA in HK-2 cells in severe hypoxia. Accordingly, miR-210 overexpression caused significant inhibition of the HIF-1α pathway and attenuated apoptosis caused by hypoxia, while miR-210 knockdown exerted the opposite effect. Taken together, our findings verify that miR-210 is involved in the molecular response in hypoxic kidney lesions in vivo and attenuates hypoxia-induced renal tubular cell apoptosis by targeting HIF-1α directly and suppressing HIF-1α pathway activation in vitro.
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Affiliation(s)
- Li-Li Liu
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China.,Navy Aviation and Diving Medical Center, Navy General Hospital of PLA, Beijing, China
| | - Dahu Li
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Yun-Ling He
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Yan-Zhao Zhou
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Sheng-Hui Gong
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Li-Ying Wu
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Yong-Qi Zhao
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Xin Huang
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Tong Zhao
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Lun Xu
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Kui-Wu Wu
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China
| | - Ming-Gao Li
- Navy Aviation and Diving Medical Center, Navy General Hospital of PLA, Beijing, China
| | - Ling-Ling Zhu
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Ming Fan
- Department of Cognitive Science, Institute of Basic Medical Sciences, Beijing, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China.,Beijing Institute for Brain Disorders, Beijing, China
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30
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Ariazi JL, Duffy KJ, Adams DF, Fitch DM, Luo L, Pappalardi M, Biju M, DiFilippo EH, Shaw T, Wiggall K, Erickson-Miller C. Discovery and Preclinical Characterization of GSK1278863 (Daprodustat), a Small Molecule Hypoxia Inducible Factor–Prolyl Hydroxylase Inhibitor for Anemia. J Pharmacol Exp Ther 2017; 363:336-347. [DOI: 10.1124/jpet.117.242503] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/26/2017] [Indexed: 12/17/2022] Open
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31
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Abstract
O2 is essential for the maintenance and growth of aerobic animals, similar to the essentiality of what are classically considered nutrients. Nevertheless, O2 is not customarily regarded as a nutrient, this reflecting the route by which it enters the body - through the lungs or gills in vertebrates, rather than via the mouth and gastrointestinal tract. A relative deficiency of O2 occurs at high altitudes and during deep-sea diving, to which distinct adaptations occur. Deficiency is also evident in lung diseases such as emphysema. Without O2, mitochondrial respiration and oxidative phosphorylation cannot take place. At a molecular level, cells adapt to O2 deficiency by switching from oxidative metabolism to anaerobic glycolysis and there are changes in the expression of a multiplicity of genes, driven by hypoxia-sensitive transcription factors, particularly hypoxia-inducible factor-1. It is argued that O2 should be fully included within the remit of nutritional science alongside the other essential macronutrients.
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32
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Meng Q, Qin Y, Deshpande M, Kashiwabuchi F, Rodrigues M, Lu Q, Ren H, Elisseeff JH, Semenza GL, Montaner SV, Sodhi A. Hypoxia-Inducible Factor-Dependent Expression of Angiopoietin-Like 4 by Conjunctival Epithelial Cells Promotes the Angiogenic Phenotype of Pterygia. Invest Ophthalmol Vis Sci 2017; 58:4514-4523. [PMID: 28873177 PMCID: PMC5584708 DOI: 10.1167/iovs.17-21974] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Purpose Disappointing results from clinical studies assessing the efficacy of therapies targeting vascular endothelial growth factor (VEGF) for the treatment of pterygia suggest that other angiogenic mediators may also play a role in its development. We therefore explore the relative contribution of VEGF, hypoxia-inducible factor (HIF)-1α (the transcription factor that regulates VEGF expression in ocular neovascular disease), and a second HIF-regulated mediator, angiopoietin-like 4 (ANGPTL4), to the angiogenic phenotype of pterygia. Methods Expression of HIF-1α, VEGF, and ANGPTL4 were examined in surgically excised pterygia, and in immortalized human (ih) and primary rabbit (pr) conjunctival epithelial cells (CjECs). Endothelial cell (EC) tubule formation assays using media conditioned by ihCjECs in the presence or absence of inducers/inhibitors of HIF-1 or RNA interference (RNAi) targeting VEGF, ANGPTL4, or both were used to assess their relative contribution to the angiogenic potential of these cells. Results HIF-1α and VEGF expression were detected in 6/6 surgically excised pterygia and localized to CjECs. Accumulation of HIF-1α in was confirmed in ihCjECs and prCjECs, including stratified prCjECs grown on collagen vitrigel, and resulted in expression of VEGF and the promotion of EC tubule formation; the latter effect was partially blocked using RNAi targeting VEGF mRNA expression. We demonstrate expression of a second HIF-regulated angiogenic mediator, ANGPTL4, in CjECs in culture and in surgically excised pterygia. RNAi targeting ANGPTL4 inhibited EC tubule formation and was additive to RNAi targeting VEGF. Conclusions Our results support the development of therapies targeting both ANGPTL4 and VEGF for the treatment of patients with pterygia.
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Affiliation(s)
- Qianli Meng
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Guangdong Eye Institute, Department of Ophthalmology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou Guangdong, China
| | - Yaowu Qin
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,EENT Hospital, Fudan University, Shanghai, China
| | - Monika Deshpande
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Fabiana Kashiwabuchi
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Murilo Rodrigues
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Qiaozhi Lu
- Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Hui Ren
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,EENT Hospital, Fudan University, Shanghai, China
| | - Jennifer H. Elisseeff
- Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Gregg L. Semenza
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
,McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Silvia V. Montaner
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, Maryland, United States
,Department of Pathology, School of Medicine, University of Maryland, Baltimore, Maryland, United States
,Greenebaum Cancer Center, University of Maryland, Baltimore, Maryland, United States
| | - Akrit Sodhi
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
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33
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Riera‐Romo M. COMMD1: A Multifunctional Regulatory Protein. J Cell Biochem 2017; 119:34-51. [DOI: 10.1002/jcb.26151] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 05/19/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Mario Riera‐Romo
- Department of PharmacologyInstitute of Marine SciencesHavanaCuba
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34
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Sharma NM, Cunningham CJ, Zheng H, Liu X, Patel KP. Hypoxia-Inducible Factor-1α Mediates Increased Sympathoexcitation via Glutamatergic N-Methyl-d-Aspartate Receptors in the Paraventricular Nucleus of Rats With Chronic Heart Failure. Circ Heart Fail 2017; 9:CIRCHEARTFAILURE.116.003423. [PMID: 27810863 DOI: 10.1161/circheartfailure.116.003423] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 10/13/2016] [Indexed: 12/30/2022]
Abstract
BACKGROUND Increased sympathetic outflow is a major contributor to the progression of chronic heart failure (CHF). Potentiation of glutamatergic tone has been causally related to the sympathoexcitation in CHF. Specifically, an increase in the N-methyl-d-aspartate-type 1 receptor (NMDA-NR1) expression within the paraventricular nucleus (PVN) is critically linked to the increased sympathoexcitation during CHF. However, the molecular mechanism(s) for the upregulation of NMDA-NR1 remains unexplored. We hypothesized that hypoxia via hypoxia-inducible factor 1α (HIF-1α) might contribute to the augmentation of the NMDA-NR1-mediated sympathoexcitatory responses from the PVN in CHF. METHODS AND RESULTS Immunohistochemistry staining, mRNA, and protein for hypoxia-inducible factor 1α were upregulated within the PVN of left coronary artery-ligated CHF rats. In neuronal cell line (NG108-15) in vitro, hypoxia caused a significant increase in mRNA and protein for HIF-1α (2-fold) with the concomitant increase in NMDA-NR1 mRNA, protein levels, and glutamate-induced Ca+ influx. Chromatin immunoprecipitation assay identified HIF-1α binding to NMDA-NR1 promoter during hypoxia. Silencing of HIF-1α in NG108 cells leads to a significant decrease in expression of NMDA-NR1, suggesting that expression of HIF-1α is necessary for the upregulation of NMDA-NR1. Consistent with these observations, HIF-1α silencing within the PVN abrogated the increased basal sympathetic tone and sympathoexcitatory responses to microinjection of NMDA in the PVN of rats with CHF. CONCLUSIONS These results uncover a critical role for HIF-1 in the upregulation of NMDA-NR1 to mediate sympathoexcitation in CHF. We conclude that subtle hypoxia within the PVN may act as a metabolic cue to modulate sympathoexcitation during CHF.
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Affiliation(s)
- Neeru M Sharma
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Craig J Cunningham
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Hong Zheng
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Xuefei Liu
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha
| | - Kaushik P Patel
- From the Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha.
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35
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Wolff M, Kosyna FK, Dunst J, Jelkmann W, Depping R. Impact of hypoxia inducible factors on estrogen receptor expression in breast cancer cells. Arch Biochem Biophys 2016; 613:23-30. [PMID: 27823907 DOI: 10.1016/j.abb.2016.11.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 10/31/2016] [Accepted: 11/03/2016] [Indexed: 12/29/2022]
Abstract
In women breast cancer is still the most commonly diagnosed cancer. This type of cancer is classified as a hormone-dependent tumor. Estrogen receptor (ER) expression and functional status contribute to breast cancer development and progression. Another important factor associated with cancer is hypoxia which is defined as the state of reduced oxygen availability in tissues. Intratumoral hypoxia results in the activation of the hypoxia inducible factors (HIFs). HIFs are heterodimeric transcription factors involved in the regulation of many cellular processes, such as angiogenesis, anaerobic metabolism, cell proliferation/survival, and promotion of metastasis. In this study we evaluated the interplay between hypoxia, HIF stabilization and the ER-α/β-ratio in several ER-positive breast cancer cell lines. Hypoxia was shown to inhibit ER expression in ER-positive breast cancer cells. Further experiments using the hypoxia mimetic CoCl2 and HIF-1α knockdown cells indicated that the influence of hypoxia on breast cancer cells involves other pathways than the molecular oxygen sensing pathway. Moreover, we demonstrated that MCF-7 cells in long-term culture lost part of their ability to respond to hypoxic incubation. Understanding the relationships between HIF, ER-α and ER-β expression holds the promise of the development of new therapeutic agents and may provide future advances in prognosis.
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Affiliation(s)
- Matthias Wolff
- Institute of Physiology, Center for Structural and Cell Biology in Medicine, University of Lübeck, Germany; Klinik für Strahlentherapie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Germany
| | | | - Jürgen Dunst
- Klinik für Strahlentherapie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Germany
| | - Wolfgang Jelkmann
- Institute of Physiology, Center for Structural and Cell Biology in Medicine, University of Lübeck, Germany
| | - Reinhard Depping
- Institute of Physiology, Center for Structural and Cell Biology in Medicine, University of Lübeck, Germany.
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36
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Salomon RG. Carboxyethylpyrroles: From Hypothesis to the Discovery of Biologically Active Natural Products. Chem Res Toxicol 2016; 30:105-113. [PMID: 27750413 DOI: 10.1021/acs.chemrestox.6b00304] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Our research on the roles of lipid oxidation in human disease is guided by chemical intuition. For example, we postulated that 2-(ω-carboxyethyl)pyrrole (CEP) derivatives of primary amines would be produced through covalent adduction of a γ-hydroxyalkenal generated, in turn, through oxidative fragmentation of docosahexaenoates. Our studies confirmed the natural occurrence of this chemistry, and the biological activities of these natural products and their extensive involvements in human physiology (wound healing) and pathology (age-related macular degeneration, autism, atherosclerosis, sickle cell disease, and tumor growth) continue to emerge. This perspective recounts these discoveries and proposes new frontiers where further developments are likely. Perhaps more significantly, it depicts an effective chemistry-based approach to the discovery of novel biochemistry.
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Affiliation(s)
- Robert G Salomon
- Department of Chemistry, Case Western Reserve University , Cleveland, Ohio 44106, United States
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37
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Multiple across-strain and within-strain QTLs suggest highly complex genetic architecture for hypoxia tolerance in channel catfish. Mol Genet Genomics 2016; 292:63-76. [PMID: 27734158 DOI: 10.1007/s00438-016-1256-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 10/03/2016] [Indexed: 10/20/2022]
Abstract
The ability to survive hypoxic conditions is important for various organisms, especially for aquatic animals. Teleost fish, representing more than 50 % of vertebrate species, are extremely efficient in utilizing low levels of dissolved oxygen in water. However, huge variations exist among various taxa of fish in their ability to tolerate hypoxia. In aquaculture, hypoxia tolerance is among the most important traits because hypoxia can cause major economic losses. Genetic enhancement for hypoxia tolerance in catfish is of great interest, but little was done with analysis of the genetic architecture of hypoxia tolerance. The objective of this study was to conduct a genome-wide association study to identify QTLs for hypoxia tolerance using the catfish 250K SNP array with channel catfish families from six strains. Multiple significant and suggestive QTLs were identified across and within strains. One significant QTL and four suggestive QTLs were identified across strains. Six significant QTLs and many suggestive QTLs were identified within strains. There were rare overlaps among the QTLs identified within the six strains, suggesting a complex genetic architecture of hypoxia tolerance. Overall, within-strain QTLs explained larger proportion of phenotypic variation than across-strain QTLs. Many of genes within these identified QTLs have known functions for regulation of oxygen metabolism and involvement in hypoxia responses. Pathway analysis indicated that most of these genes were involved in MAPK or PI3K/AKT/mTOR signaling pathways that were known to be important for hypoxia-mediated angiogenesis, cell proliferation, apoptosis and survival.
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38
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Mercurio V, Pirozzi F, Lazzarini E, Marone G, Rizzo P, Agnetti G, Tocchetti CG, Ghigo A, Ameri P. Models of Heart Failure Based on the Cardiotoxicity of Anticancer Drugs. J Card Fail 2016; 22:449-58. [PMID: 27103426 DOI: 10.1016/j.cardfail.2016.04.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/12/2016] [Accepted: 04/13/2016] [Indexed: 12/13/2022]
Abstract
Heart failure (HF) is a complication of oncological treatments that may have dramatic clinical impact. It may acutely worsen a patient's condition or it may present with delayed onset, even years after treatment, when cancer has been cured or is in stable remission. Several studies have addressed the mechanisms of cancer therapy-related HF and some have led to the definition of disease models that hold valid for other and more common types of HF. Here, we review these models of HF based on the cardiotoxicity of antineoplastic drugs and classify them in cardiomyocyte-intrinsic, paracrine, or potentially secondary to effects on cardiac progenitor cells. The first group includes HF resulting from the combination of oxidative stress, mitochondrial dysfunction, and activation of the DNA damage response, which is typically caused by anthracyclines, and HF resulting from deranged myocardial energetics, such as that triggered by anthracyclines and sunitinib. Blockade of the neuregulin-1/ErbB4/ErbB2, vascular endothelial growth factor/vascular endothelial growth factor receptor and platelet-derived growth factor /platelet-derived growth factor receptor pathways by trastuzumab, sorafenib and sunitinib is proposed as paradigm of cancer therapy-related HF associated with alterations of myocardial paracrine pathways. Finally, anthracyclines and trastuzumab are also presented as examples of antitumor agents that induce HF by affecting the cardiac progenitor cell population.
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Affiliation(s)
- Valentina Mercurio
- Division of Internal Medicine, Department of Translational Medical Sciences, Federico II University, Naples, Italy
| | - Flora Pirozzi
- Division of Internal Medicine, Department of Translational Medical Sciences, Federico II University, Naples, Italy
| | - Edoardo Lazzarini
- Laboratory of Cardiovascular Biology, Department of Internal Medicine, University of Genova, Genova, Italy
| | - Giancarlo Marone
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Paola Rizzo
- Department of Morphology, Surgery and Experimental Medicine and Laboratory for Technologies of Advanced Therapies, University of Ferrara, Ferrara, Italy
| | - Giulio Agnetti
- Johns Hopkins University, Cardiology, Baltimore, Maryland; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Carlo G Tocchetti
- Division of Internal Medicine, Department of Translational Medical Sciences, Federico II University, Naples, Italy.
| | - Alessandra Ghigo
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Pietro Ameri
- Laboratory of Cardiovascular Biology, Department of Internal Medicine, University of Genova, Genova, Italy
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39
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Gong H, Chao Y, Xiang J, Han X, Song G, Feng L, Liu J, Yang G, Chen Q, Liu Z. Hyaluronidase To Enhance Nanoparticle-Based Photodynamic Tumor Therapy. NANO LETTERS 2016; 16:2512-21. [PMID: 27022664 DOI: 10.1021/acs.nanolett.6b00068] [Citation(s) in RCA: 229] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Photodynamic therapy (PDT) is considered as a safe and selective way to treat a wide range of cancers as well as nononcological disorders. However, as oxygen is required in the process of PDT, the hypoxic tumor microenvironment has largely limited the efficacy of PDT to treat tumors especially those with relatively large sizes. To this end, we uncover that hyaluronidase (HAase), which breaks down hyaluronan, a major component of extracellular matrix (ECM) in tumors, would be able to enhance the efficacy of nanoparticle-based PDT for in vivo cancer treatment. It is found that the administration of HAase would lead to the increase of tumor vessel densities and effective vascular areas, resulting in increased perfusion inside the tumor. As a result, the tumor uptake of nanomicelles covalently linked with chlorine e6 (NM-Ce6) would be increased by ∼2 folds due to the improved "enhanced permeability and retention" (EPR) effect, while the tumor oxygenation level also shows a remarkable increase, effectively relieving the hypoxia state inside the tumor. Those effects taken together offer significant benefits in greatly improving the efficacy of PDT delivered by nanoparticles. Taking advantage of the effective migration of HAase from the primary tumor to its drainage sentinel lymph nodes (SLNs), we further demonstrate that this strategy would be helpful to the treatment of metastatic lymph nodes by nanoparticle-based PDT. Lastly, both enhanced EPR effect of NM-Ce6 and relieved hypoxia state of tumor are also observed after systemic injection of modified HAase, proving its potential for clinical translation. Therefore, our work presents a new concept to improve the efficacy of nanomedicine by modulating the tumor microenvironment.
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Affiliation(s)
- Hua Gong
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Yu Chao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Jian Xiang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Xiao Han
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Guosheng Song
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Liangzhu Feng
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Jingjing Liu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Guangbao Yang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Qian Chen
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
| | - Zhuang Liu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, China
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Dai XY, Zhuang LH, Wang DD, Zhou TY, Chang LL, Gai RH, Zhu DF, Yang B, Zhu H, He QJ. Nuclear translocation and activation of YAP by hypoxia contributes to the chemoresistance of SN38 in hepatocellular carcinoma cells. Oncotarget 2016; 7:6933-47. [PMID: 26771844 PMCID: PMC4872759 DOI: 10.18632/oncotarget.6903] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 12/29/2015] [Indexed: 02/06/2023] Open
Abstract
Although hypoxia is a prominent feature contributing to the therapeutic resistance of hepatocellular carcinoma cells (HCC) against chemotherapeutic agents, including the Topoisomerase I inhibitor SN38, the underlying mechanism is not fully understood and its understanding remains a major clinical challenge. In the present study, we found that hypoxia-induced nuclear translocation and accumulation of YAP acted as a survival input to promote resistance to SN38 in HCC. The induction of YAP by hypoxia was not mediated by HIF-1α because manipulating the abundance of HIF-1α with CoCl2, exogenous expression, and RNA interference had no effect on the phosphorylation or total levels of YAP. The mevalonate-HMG-CoA reductase (HMGCR) pathway may modulate the YAP activation under hypoxia. Combined YAP inhibition using either siRNA or the HMGCR inhibitor statins together with SN38 treatment produced improved anti-cancer effects in HCC cells. The increased anti-cancer effect of the combined treatment with statins and irinotecan (the prodrug of SN-38) was further validated in a human HepG2 xenograft model of HCC in nude mice. Taken together, our findings identify YAP as a novel mediator of hypoxic-resistance to SN38. These results suggest that the administration of SN28 together with the suppression of YAP using statins is a promising strategy for enhancing the treatment response in HCC patients, particularly in advanced stage HCC cases presenting hypoxic resistance.
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MESH Headings
- Adaptor Proteins, Signal Transducing/genetics
- Adaptor Proteins, Signal Transducing/metabolism
- Animals
- Antineoplastic Agents, Phytogenic/pharmacology
- Apoptosis
- Blotting, Western
- Camptothecin/analogs & derivatives
- Camptothecin/pharmacology
- Carcinoma, Hepatocellular/drug therapy
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cell Nucleus/metabolism
- Cell Proliferation
- Drug Resistance, Neoplasm
- Fluorescent Antibody Technique
- Gene Expression Regulation, Neoplastic/drug effects
- Humans
- Hypoxia/complications
- Hypoxia/physiopathology
- Immunoenzyme Techniques
- Irinotecan
- Liver Neoplasms/drug therapy
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Mice
- Mice, Nude
- Phosphoproteins/genetics
- Phosphoproteins/metabolism
- Protein Transport
- RNA, Messenger/genetics
- Real-Time Polymerase Chain Reaction
- Reverse Transcriptase Polymerase Chain Reaction
- Signal Transduction/drug effects
- Transcription Factors
- Tumor Cells, Cultured
- Xenograft Model Antitumor Assays
- YAP-Signaling Proteins
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Affiliation(s)
- Xiao-Yang Dai
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Center for Drug Safety Evaluation and Research of Zhejiang University, Hangzhou 310058, China
| | - Lin-Han Zhuang
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Dan-Dan Wang
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Tian-Yi Zhou
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lin-Lin Chang
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ren-Hua Gai
- Center for Drug Safety Evaluation and Research of Zhejiang University, Hangzhou 310058, China
| | - Di-Feng Zhu
- Center for Drug Safety Evaluation and Research of Zhejiang University, Hangzhou 310058, China
| | - Bo Yang
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hong Zhu
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Qiao-Jun He
- Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
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Archontogeorgis K, Nena E, Papanas N, Xanthoudaki M, Hatzizisi O, Kyriazis G, Tsara V, Maltezos E, Froudarakis M, Steiropoulos P. Serum Levels of Vascular Endothelial Growth Factor and Insulin-like Growth Factor Binding Protein-3 in Obstructive Sleep Apnea Patients: Effect of Continuous Positive Airway Pressure Treatment. Open Cardiovasc Med J 2015; 9:133-8. [PMID: 27006717 PMCID: PMC4768659 DOI: 10.2174/1874192401509010133] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Revised: 09/20/2015] [Accepted: 10/22/2015] [Indexed: 01/03/2023] Open
Abstract
Background and Aim: Hypoxia, a major feature of obstructive sleep apnea (OSA), modifies Vascular Endothelial
Growth Factor (VEGF) and Insulin-like Growth Factor Binding Protein-3 (IGFBP-3) levels, which contribute to
atherogenesis and occurrence of cardiovascular (CV) events. We assessed and compared serum levels of VEGF and
IGFBP-3 in newly diagnosed OSA patients and controls, to explore associations with anthropometric and sleep parameters
and to study the effect of continuous positive airway pressure (CPAP) treatment on these levels. Materials and Methods: Serum levels of VEGF and IGFBP-3 were measured in 65 OSA patients and 31 age- and body
mass index- matched controls. In OSA patients, measurements were repeated after 6 months of CPAP therapy. All participants
were non-smokers, without any comorbidities or systemic medication use. Results: At baseline, serum VEGF levels in OSA patients were higher compared with controls (p<0.001), while IGFBP-3
levels were lower (1.41±0.56 vs. 1.61±0.38 μg/ml, p=0.039). VEGF levels correlated with apnea-hypopnea index
(r=0.336, p=0.001) and oxygen desaturation index (r=0.282, p=0.007). After 6 months on CPAP treatment, VEGF levels
decreased in OSA patients (p<0.001), while IGFBP-3 levels increased (p<0.001). Conclusion: In newly diagnosed OSA patients, serum levels of VEGF are elevated, while IGFBP-3 levels are low. After 6
months of CPAP treatment these levels change. These results may reflect an increased CV risk in untreated OSA patients,
which is ameliorated after CPAP therapy.
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Affiliation(s)
- Kostas Archontogeorgis
- Department of Pneumonology, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Evangelia Nena
- Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Nikolaos Papanas
- Second Department of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Maria Xanthoudaki
- Department of Pneumonology, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Olga Hatzizisi
- Department of Pneumonology, General Hospital "G. Papanikolaou", Thessaloniki, Greece
| | - Georgios Kyriazis
- Department of Pneumonology, General Hospital "G. Papanikolaou", Thessaloniki, Greece
| | - Venetia Tsara
- Department of Pneumonology, General Hospital "G. Papanikolaou", Thessaloniki, Greece
| | - Efstratios Maltezos
- Second Department of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Marios Froudarakis
- Department of Pneumonology, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Paschalis Steiropoulos
- Department of Pneumonology, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
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Pieterse B, Rijk IJC, Simon E, van Vugt-Lussenburg BMA, Fokke BFH, van der Wijk M, Besselink H, Weber R, van der Burg B. Effect-based assessment of persistent organic pollutant and pesticide dumpsite using mammalian CALUX reporter cell lines. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:14442-54. [PMID: 26022396 DOI: 10.1007/s11356-015-4739-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 05/18/2015] [Indexed: 04/15/2023]
Abstract
A combined chemical and biological analysis of samples from a major obsolete pesticide and persistent organic pollutant (POP) dumpsite in Northern Tajikistan was carried out. The chemical analytical screening focused on a range of prioritized compounds and compounds known to be present locally. Since chemical analytics does not allow measurements of hazards in complex mixtures, we tested the use of a novel effect-based approach using a panel of quantitative high-throughput CALUX reporter assays measuring distinct biological effects relevant in hazard assessment. Assays were included for assessing effects related to estrogen, androgen, and progestin signaling, aryl hydrocarbon receptor-mediated signaling, AP1 signaling, genotoxicity, oxidative stress, chemical hypoxia, and ER stress. With this panel of assays, we first quantified the biological activities of the individual chemicals measured in chemical analytics. Next, we calculated the expected sum activity by these chemicals in the samples of the pesticide dump site and compared the results with the measured CALUX bioactivity of the total extracts of these samples. The results showed that particularly endocrine disruption-related effects were common among the samples. This was consistent with the toxicological profiles of the individual chemicals that dominated these samples. However, large discrepancies between chemical and biological analysis were found in a sample from a burn place present in this site, with biological activities that could not be explained by chemical analysis. This is likely to be caused by toxic combustion products or by spills of compounds that were not targeted in the chemical analysis.
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Affiliation(s)
- B Pieterse
- BioDetection Systems B.V., Science Park 406, Amsterdam, The Netherlands.
| | - I J C Rijk
- Witteveen+Bos Consulting Engineers B.V., Deventer, The Netherlands
| | - E Simon
- BioDetection Systems B.V., Science Park 406, Amsterdam, The Netherlands
| | | | | | - M van der Wijk
- Witteveen+Bos Consulting Engineers B.V., Deventer, The Netherlands
| | - H Besselink
- BioDetection Systems B.V., Science Park 406, Amsterdam, The Netherlands
| | - R Weber
- POPs Environmental Consulting, Schwaebisch Gmuend, Germany
| | - B van der Burg
- BioDetection Systems B.V., Science Park 406, Amsterdam, The Netherlands
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Boeckx C, Van den Bossche J, De Pauw I, Peeters M, Lardon F, Baay M, Wouters A. The hypoxic tumor microenvironment and drug resistance against EGFR inhibitors: preclinical study in cetuximab-sensitive head and neck squamous cell carcinoma cell lines. BMC Res Notes 2015; 8:203. [PMID: 26032726 PMCID: PMC4467624 DOI: 10.1186/s13104-015-1197-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 05/20/2015] [Indexed: 11/10/2022] Open
Abstract
Background Increased expression of the epidermal growth factor receptor (EGFR) is observed in more than 90% of all head and neck squamous cell carcinomas (HNSCC). Therefore, EGFR has emerged as a promising therapeutic target. Nevertheless, drug resistance remains a major challenge and an important potential mechanism of drug resistance involves the hypoxic tumor microenvironment. Therefore, we investigated the cytotoxic effect of the EGFR-targeting agents cetuximab and erlotinib under normoxia versus hypoxia. Findings Three cetuximab-sensitive HNSCC cell lines (SC263, LICR-HN2 and LICR-HN5) were treated with either cetuximab or erlotinib. Cells were incubated under normal or reduced oxygen conditions (<0.1% O2) for 24 or 72 h immediately after drug addition. Cell survival was assessed with the sulforhodamine B assay. Cetuximab and erlotinib established a dose-dependent growth inhibition under both normal and prolonged reduced oxygen conditions in all three HNSCC cell lines. However, a significantly increased sensitivity to cetuximab was observed in SC263 cells exposed to hypoxia for 72 h (p = 0.05), with IC50 values of 2.38 ± 0.59 nM, 0.64 ± 0.38 nM, and 0.10 ± 0.05 nM under normoxia, hypoxia for 24 h and hypoxia for 72 h, respectively. LICR-HN5 cells showed an increased sensitivity towards erlotinib when cells were incubated under hypoxia for 24 h (p = 0.05). Conclusions Our results suggest that both EGFR-inhibitors cetuximab and erlotinib maintain their growth inhibitory effect under hypoxia. These results suggest that resistance to anti-EGFR therapy in HNSCC is probably not the result of hypoxic regions within the tumor and other mechanisms are involved.
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Affiliation(s)
- Carolien Boeckx
- Center for Oncological Research (CORE) Antwerp, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
| | - Jolien Van den Bossche
- Center for Oncological Research (CORE) Antwerp, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
| | - Ines De Pauw
- Center for Oncological Research (CORE) Antwerp, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
| | - Marc Peeters
- Center for Oncological Research (CORE) Antwerp, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium. .,Department of Oncology, Antwerp University Hospital, Wilrijkstraat 10, 2650, Edegem, Belgium.
| | - Filip Lardon
- Center for Oncological Research (CORE) Antwerp, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
| | - Marc Baay
- Center for Oncological Research (CORE) Antwerp, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
| | - An Wouters
- Center for Oncological Research (CORE) Antwerp, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
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Jiang Y, Wang J, Tian H, Li G, Zhu H, Liu L, Hu R, Dai A. Increased SUMO-1 expression in response to hypoxia: Interaction with HIF-1α in hypoxic pulmonary hypertension. Int J Mol Med 2015; 36:271-81. [PMID: 25976847 DOI: 10.3892/ijmm.2015.2209] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 04/28/2015] [Indexed: 11/06/2022] Open
Abstract
Pulmonary hypertension (PH) develops in 30-70% of chronic obstructive pulmonary disease patients and increases morbidity and mortality. The present study aimed to investigate the regulation of small ubiquitin‑related modifier‑1 (SUMO‑1) expression in response to hypoxia. The experiments were carried out in vitro in rat pulmonary arterial smooth muscle cells (PASMCs) and in vivo using a rat hypoxic PH (HPH) model. A significant increase in SUMO‑1 mRNA and protein levels was observed following hypoxic stimulation in vivo and in vitro. SUMO‑1 is known to interact with various transcription factors, including hypoxia‑inducible factor‑1α (HIF‑1α) in vitro. Notably, the expression of HIF‑1α and its target gene, vascular endothelial growth factor, was increased by hypoxia in HPH. In addition, the present data suggest that SUMO‑1 regulated HIF‑1α in response to hypoxia (gene silencing and overexpression). Finally, the co‑immunoprecipitation assays suggest a direct and specific interaction between SUMO‑1 and HIF‑1α. In conclusion, SUMO‑1 may participate in the modulation of HIF‑1α through sumoylation in HPH. However, further studies are required to confirm this.
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Affiliation(s)
- Yongliang Jiang
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
| | - Jing Wang
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
| | - Hua Tian
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
| | - Guang Li
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
| | - Hao Zhu
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
| | - Lei Liu
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
| | - Ruicheng Hu
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
| | - Aiguo Dai
- Institute of Respiratory Medicine, Hunan Province Geriatric Hospital, Changsha, Hunan 410016, P.R. China
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Lee SH, Jee JG, Bae JS, Liu KH, Lee YM. A group of novel HIF-1α inhibitors, glyceollins, blocks HIF-1α synthesis and decreases its stability via inhibition of the PI3K/AKT/mTOR pathway and Hsp90 binding. J Cell Physiol 2015; 230:853-62. [PMID: 25204544 DOI: 10.1002/jcp.24813] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 09/05/2014] [Indexed: 12/17/2022]
Abstract
Glyceollins, a group of phytoalexins isolated from soybean, are known to exhibit anticancer, antiestrogenic, and antiangiogenic activities. However, whether glyceollins regulate tumor growth through regulation of hypoxia-inducible factor (HIF)-1α has not been investigated. We determined whether and how glyceollins regulate the synthesis and stability of HIF-1α. Quantitative real-time PCR revealed that glyceollins inhibited the expression of HIF-1-induced genes such as vascular endothelial growth factor (VEGF) in cancer cells. Enzyme-linked immunosorbent assay and reporter luciferase assay showed that glyceollins decreased VEGF secretion and its promoter activity, respectively. Treatment of various cancer cells with 0.5-100 µM glyceollins under hypoxic conditions reduced the expression of HIF-1α. Glyceollins blocked translation of HIF-1α by inhibiting the PI3K/AKT/mTOR pathway under hypoxic conditions. Glyceollins decreased the stability of HIF-1α after treatment with cycloheximide, a protein synthesis inhibitor, and increased the ubiquitination of HIF-1α after treatment with MG132, a proteasome inhibitor. Glyceollins blocked the interaction of Hsp90 with HIF-1α, as shown by immunoprecipitation assay. Chemical binding of Hsp90 with glyceollins, as confirmed by computational docking analysis, was stronger than that with geldanamycin at the HSP90 ATP-binding pocket. We found that glyceollins decreased microvessel density, as well as expression of phosphorylated AKT/mTOR and the Hsp90 client protein CDK4, in solid tumor tissues. Glyceollins potently inhibited HIF-1α synthesis and decreased its stability by blocking the PI3K/AKT/mTOR pathway and HSP90 binding activity, respectively. These results may provide new perspectives into potential therapeutic application of glyceollins for the prevention and treatment of hypervascularized diseases and into the mechanism of their anticancer activity.
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Affiliation(s)
- Sun-Hee Lee
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
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O'Connor LJ, Cazares-Körner C, Saha J, Evans CNG, Stratford MRL, Hammond EM, Conway SJ. Efficient synthesis of 2-nitroimidazole derivatives and the bioreductive clinical candidate Evofosfamide (TH-302). Org Chem Front 2015. [DOI: 10.1039/c5qo00211g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe an improved synthesis of the 2-nitroimidazole bioreductive group; this method is used to synthesise the anti-cancer drug Evofosfamide (TH-302.)
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Affiliation(s)
- Liam J. O'Connor
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - Cindy Cazares-Körner
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - Jaideep Saha
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - Charles N. G. Evans
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - Michael R. L. Stratford
- Cancer Research UK/MRC Oxford Institute for Radiation Oncology
- Department of Oncology
- University of Oxford
- Oxford
- UK
| | - Ester M. Hammond
- Cancer Research UK/MRC Oxford Institute for Radiation Oncology
- Department of Oncology
- University of Oxford
- Oxford
- UK
| | - Stuart J. Conway
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
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Anti-inflammatory effects of simvastatin in patients with chronic heart failure. Bull Exp Biol Med 2014; 157:552-4. [PMID: 25257410 DOI: 10.1007/s10517-014-2612-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Indexed: 10/24/2022]
Abstract
Proinflammatory markers were evaluated in patients with chronic heart failure of ischemic origin and essential hypertension with preserved left-ventricular ejection fraction before and after a 6-month course of simvastatin therapy (20 mg/day). The study was carried out in 125 patients with diastolic dysfunction manifested as impaired relaxation and pseudonormalization. The main group received standard therapy for chronic heart failure and simvastatin, controls received only standard therapy. In addition, the results in the main group were compared in patients with different types of left-ventricular diastolic dysfunction. Simvastatin therapy significantly reduced the levels of C-reactive protein and IL-6.
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Delle Monache S, Sanità P, Calgani A, Schenone S, Botta L, Angelucci A. Src inhibition potentiates antitumoral effect of paclitaxel by blocking tumor-induced angiogenesis. Exp Cell Res 2014; 328:20-31. [PMID: 25128812 DOI: 10.1016/j.yexcr.2014.08.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 07/31/2014] [Accepted: 08/02/2014] [Indexed: 12/25/2022]
Abstract
The protein kinase Src is frequently over-activated in advanced cancers where it modulates the signaling transduction cascade of several growth factors. The feasibility of combination treatment of Src inhibitors with chemotherapy is currently under investigation. We evaluated the anti-tumoral effect of paclitaxel (PTX) in combination with S13, a tyrosine kinase inhibitor with a prevalent specificity for Src, in a hormone-insensible prostate cancer (PCa) cell model. In vivo, combination treatment with PTX and S13 reduced dramatically PCa tumor growth with a relevant difference in the density of new blood vessels with respect to control and single treatments. This reduction was determined by a concomitant impairment of endothelial cell migration and of VEGF release by cancer cells. In fact, S13, when used alone, was sufficient to reduce tubule formation in vivo, and to inhibit VEGFR2 activation and FAK expression in endothelial cells. In addition, the combination treatment determined a significant reduction in ROS production and HIF-1 stabilization in PCa cells respect to single treatments with S13 or PTX. In conclusion, Src-inhibition could be an effective therapeutic strategy aimed at supporting the anti-angiogenic action of PTX in aggressive PCa.
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Affiliation(s)
- Simona Delle Monache
- Dipartimento di Scienze Cliniche Applicate e Biotecnologiche, University of L׳Aquila, via Vetoio Coppito, 67100 L׳Aquila, Italy.
| | - Patrizia Sanità
- Dipartimento di Scienze Cliniche Applicate e Biotecnologiche, University of L׳Aquila, via Vetoio Coppito, 67100 L׳Aquila, Italy
| | - Alessia Calgani
- Dipartimento di Scienze Cliniche Applicate e Biotecnologiche, University of L׳Aquila, via Vetoio Coppito, 67100 L׳Aquila, Italy
| | - Silvia Schenone
- Dipartimento di Farmacia, University of Genova, viale Benedetto XV, 3, 16132 Genova, Italy
| | - Lorenzo Botta
- Dipartimento di Biotecnologie, Chimica e Farmacia, University of via A. Moro, snc, 53100, Siena, Italy
| | - Adriano Angelucci
- Dipartimento di Scienze Cliniche Applicate e Biotecnologiche, University of L׳Aquila, via Vetoio Coppito, 67100 L׳Aquila, Italy
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Mirzaie Bavil F, Mohaddes G, Ebrahimi H, Keyhanmanesh R, Ghiyasi R, Alipour MR. Ghrelin increases lymphocytes in chronic normobaric hypoxia. Adv Pharm Bull 2014; 4:339-43. [PMID: 25436188 DOI: 10.5681/apb.2014.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 03/17/2014] [Accepted: 04/05/2014] [Indexed: 12/26/2022] Open
Abstract
PURPOSE Hypoxia is a condition of decreased availability of oxygen. To adapt hypoxia, some changes in blood cells occur in the body. The aim of this study was to evaluate the effect of ghrelin on different types of blood cell in normobaric hypoxia situation. METHODS Thirty-two animals were divided in 4 groups (n=8): control (C), ghrelin (G), hypoxia (H), and hypoxic animals that received ghrelin (H+G). Hypoxia (11%) was induced by an Environmental Chamber System GO2 Altitude. Animals in ghrelin groups received a subcutaneous injection of ghrelin (150 μg/kg/day) for 14 days. RESULTS Our results show that ghrelin significantly (p<0.05) increased RBC and Hct levels, whereas it significantly (p<0.05) decreased lymphocytes in the blood. RBC, Hct, Hb concentration, platelet and MCV increased significantly (p<0.05) in hypoxic conditions but lymphocytes, monocytes and Polymorphonuclears did not show any significant changes. Platelets had a significant (p<0.05) decrease in hypoxic conditions and ghrelin administration in hypoxic conditions could increase lymphocyte levels significantly (p<0.05). CONCLUSION Effect of ghrelin on blood cells could be related to blood oxygen level. Ghrelin in normal oxygen conditions increases RBC and Hct levels but decreases lymphocytes, whereas in hypoxic conditions, ghrelin increases blood lymphocytes.
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Affiliation(s)
- Fariba Mirzaie Bavil
- Tuberculosis and Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Gisou Mohaddes
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Ebrahimi
- Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Rana Keyhanmanesh
- Tuberculosis and Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Rafigheh Ghiyasi
- Department of Physiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Reza Alipour
- Tuberculosis and Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Ward JBJ, Keely SJ, Keely SJ. Oxygen in the regulation of intestinal epithelial transport. J Physiol 2014; 592:2473-89. [PMID: 24710059 DOI: 10.1113/jphysiol.2013.270249] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The transport of fluid, nutrients and electrolytes to and from the intestinal lumen is a primary function of epithelial cells. Normally, the intestine absorbs approximately 9 l of fluid and 1 kg of nutrients daily, driven by epithelial transport processes that consume large amounts of cellular energy and O2. The epithelium exists at the interface of the richly vascularised mucosa, and the anoxic luminal environment and this steep O2 gradient play a key role in determining the expression pattern of proteins involved in fluid, nutrient and electrolyte transport. However, the dynamic nature of the splanchnic circulation necessitates that the epithelium can evoke co-ordinated responses to fluctuations in O2 availability, which occur either as a part of the normal digestive process or as a consequence of several pathophysiological conditions. While it is known that hypoxia-responsive signals, such as reactive oxygen species, AMP-activated kinase, hypoxia-inducible factors, and prolyl hydroxylases are all important in regulating epithelial responses to altered O2 supply, our understanding of the molecular mechanisms involved is still limited. Here, we aim to review the current literature regarding the role that O2 plays in regulating intestinal transport processes and to highlight areas of research that still need to be addressed.
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Affiliation(s)
- Joseph B J Ward
- Department of Molecular Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Simon J Keely
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Newcastle NSW, Australia
| | - Stephen J Keely
- Department of Molecular Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
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