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Role of Uncoupling Protein 2 Gene Polymorphisms on the Risk of Ischemic Stroke in a Sardinian Population. Life (Basel) 2022; 12:life12050721. [PMID: 35629388 PMCID: PMC9147365 DOI: 10.3390/life12050721] [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: 03/29/2022] [Revised: 05/02/2022] [Accepted: 05/09/2022] [Indexed: 12/05/2022] Open
Abstract
The mitochondrial uncoupling protein 2 (UCP2) acts as an anion transporter and as an antioxidant factor able to reduce the reactive oxygen species level. Based on its effects, UCP2 prevents the membrane lipids, proteins, and DNA damage while preserving normal cellular functions. Many variants have been identified within the human UCP2. Some of them were associated with a higher risk of obesity, diabetes and cardiovascular diseases in different populations. UCP2 appears a suitable candidate also for the risk of ischemic stroke. In the current study, we investigated the possible association between few variants of UCP2 (rs659366, rs660339, rs1554995310) and the risk of ischemic stroke in a genetically homogenous cohort of cases and controls selected in Sardinia Island. This population has been previously analysed for other candidate genes. A total of 250 cases of ischemic stroke and 241 controls were enrolled in the study. The allelic/genotypic distribution of the 3 UCP2 variants was characterized and compared among cases and controls. The results of our study confirmed known risk factors for ischemic stroke: age, history of smoking, hypertension, hypercholesterolemia, and atrial fibrillation. No association was found between the 3 UCP2 variants and the risk of ischemic stroke in our Sardinian cohort.
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Association and interaction effect of UCP2 gene polymorphisms and dietary factors with congenital heart diseases in Chinese Han population. Sci Rep 2021; 11:8699. [PMID: 33888769 PMCID: PMC8062668 DOI: 10.1038/s41598-021-88057-2] [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: 08/14/2020] [Accepted: 04/06/2021] [Indexed: 12/02/2022] Open
Abstract
Congenital heart diseases (CHDs) are the most common birth defects and the leading cause of non-infectious deaths in infants, with an unknown etiology. We aimed to assess the association of genetic variations in UCP2 gene, dietary factors, and their interactions with the risk of CHDs in offspring. The hospital-based case–control study included 464 mothers of children with CHDs and 504 mothers of healthy children. The exposures of interest were maternal dietary factors in early pregnancy and UCP2 genetic variants. Logistic regression analyses were used to assess the association and interaction of UCP2 gene and dietary factors with CHDs. Our results found that the polymorphisms of UCP2 gene at rs659366 and rs660339, together with maternal dietary factors including excessive intake of pickled vegetables and smoked foods were associated with increased risks of CHDs in offspring. Regular intake of fresh meat, fish and shrimp, and milk products were associated with lower risks of CHDs in offspring. Besides, positive interaction between the dominant model of rs659366 and excessive intake of pickled vegetables was found in the additive interaction model (RERI = 1.19, P = 0.044). These findings provide the theoretical basis for gene screening and a new clue for the prevention of CHDs in offspring.
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Brain Overexpression of Uncoupling Protein-2 (UCP2) Delays Renal Damage and Stroke Occurrence in Stroke-Prone Spontaneously Hypertensive Rats. Int J Mol Sci 2020; 21:ijms21124289. [PMID: 32560241 PMCID: PMC7352594 DOI: 10.3390/ijms21124289] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/11/2020] [Accepted: 06/15/2020] [Indexed: 12/23/2022] Open
Abstract
The downregulation of uncoupling protein-2 (UCP2) is associated with increased brain and kidney injury in stroke-prone spontaneously hypertensive rats (SHRSP) fed with a Japanese style hypersodic diet (JD). Systemic overexpression of UCP2 reduces organ damage in JD-fed SHRSP. We examined the effect of brain-specific UCP2 overexpression on blood pressure (BP), stroke occurrence and kidney damage in JD-fed SHRSP. Rats received a single i.c.v. injection of a lentiviral vector encoding UCP2 (LV-UCP2), or an empty vector. The brain delivery of LV-UCP2 significantly delayed the occurrence of stroke and kidney damage. The large reduction of proteinuria observed after LV-UCP2 injection was unexpected, because BP levels were unchanged. At the time of stroke, rats treated with LV-UCP2 still showed a large UCP2 upregulation in the striatum, associated with increases in OPA1 and FIS1 protein levels, and reductions in PGC1-α, SOD2, TNFα mRNA levels and NRF2 protein levels. This suggested UCP2 overexpression enhanced mitochondrial fusion and fission and reduced oxidative damage and inflammation in the striatum of JD-fed SHRSP rats. Our data suggest the existence of central mechanisms that may protect against hypertension-induced organ damage independently of BP, and strengthen the suitability of strategies aimed at enhancing UCP2 expression for the treatment of hypertensive damage.
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Zhou TC, Yang L, Liu YY, Qin Y, Li YP, Zhang L, Yang K, Yang Y. Polymorphisms in the Uncoupling Protein 2 Gene Are Associated with Diabetic Retinopathy in Han Chinese Patients with Type 2 Diabetes. Genet Test Mol Biomarkers 2018; 22:637-643. [PMID: 30359091 DOI: 10.1089/gtmb.2018.0115] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The uncoupling protein 2 (UCP2) gene plays an important role in the complications of type 2 diabetes (T2D). However, the association between variants in the UCP2 gene and diabetic retinopathy (DR) in Han Chinese T2D patients remains unclear. METHODS Two single-nucleotide polymorphisms (SNPs) [rs659366 (-866G/A) and a 45-bp insertion/deletion (I/D) in the 3'-UTR] in the UCP2 gene were genotyped in a study cohort of 209 T2D patients with DR and 199 T2D patients without DR by direct DNA sequencing. RESULTS Logistic regression analysis showed that the AA and GA genotypes of rs659366 were significantly associated with an increased risk for nonproliferative DR (NPDR) in the codominant model (corrected p-value <0.01) and the dominant model (corrected p-value = 0.006). Patients harboring the II and DI genotypes had a higher risk for PDR in the codominant model (corrected p-value = 0.011) and the dominant model (corrected p-value = 0.006), and the DI genotype showed a higher risk for NPDR in the dominant model (corrected p-value = 0.007) or codominant model (corrected p-value = 0.006). Further, haplotype analyses verified that the A-I haplotype is a risk haplotype for NPDR and PDR. CONCLUSION This study suggests that the UCP2 gene may be involved in the pathogenesis of NPDR and PDR in Han Chinese patients with T2D.
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Affiliation(s)
- Tai-Cheng Zhou
- 1 Central Laboratory, Department of Endocrinology, Second People's Hospital of Yunnan Province , Kunming, China
| | - Lei Yang
- 2 Nuclear Medicine Department, Second Affiliated Hospital of Kunming Medical University , Kunming, China
| | - Yong-Ying Liu
- 3 First Affiliated Hospital of Medical College, Shihezi University , Shihezi, China
| | - Yuan Qin
- 1 Central Laboratory, Department of Endocrinology, Second People's Hospital of Yunnan Province , Kunming, China
| | - Yi-Ping Li
- 1 Central Laboratory, Department of Endocrinology, Second People's Hospital of Yunnan Province , Kunming, China
| | - Liang Zhang
- 1 Central Laboratory, Department of Endocrinology, Second People's Hospital of Yunnan Province , Kunming, China
| | - Ke Yang
- 4 Cardiology Laboratory of Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai, China
| | - Ying Yang
- 1 Central Laboratory, Department of Endocrinology, Second People's Hospital of Yunnan Province , Kunming, China
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Echtay KS, Bienengraeber M, Mayinger P, Heimpel S, Winkler E, Druhmann D, Frischmuth K, Kamp F, Huang SG. Uncoupling proteins: Martin Klingenberg's contributions for 40 years. Arch Biochem Biophys 2018; 657:41-55. [PMID: 30217511 DOI: 10.1016/j.abb.2018.09.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/07/2018] [Accepted: 09/10/2018] [Indexed: 12/22/2022]
Abstract
The uncoupling protein (UCP1) is a proton (H+) transporter in the mitochondrial inner membrane. By dissipating the electrochemical H+ gradient, UCP1 uncouples respiration from ATP synthesis, which drives an increase in substrate oxidation via the TCA cycle flux that generates more heat. The mitochondrial uncoupling-mediated non-shivering thermogenesis in brown adipose tissue is vital primarily to mammals, such as rodents and new-born humans, but more recently additional functions in adult humans have been described. UCP1 is regulated by β-adrenergic receptors through the sympathetic nervous system and at the molecular activity level by nucleotides and fatty acid to meet thermogenesis needs. The discovery of novel UCP homologs has greatly contributed to the understanding of human diseases, such as obesity and diabetes. In this article, we review the progress made towards the molecular mechanism and function of the UCPs, in particular focusing on the influential contributions from Martin Klingenberg's laboratory. Because all members of the UCP family are potentially promising drug targets, we also present and discuss possible approaches and methods for UCP-related drug discovery.
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Affiliation(s)
- Karim S Echtay
- Department of Biomedical Sciences, Faculty of Medicine and Medical Sciences, University of Balamand, P.O. Box: 100, Tripoli, Lebanon
| | - Martin Bienengraeber
- Departments of Anesthesiology and Pharmacology, Medical College of Wisconsin, Milwaukee, USA
| | - Peter Mayinger
- Division of Nephrology & Hypertension and Department of Cell, Developmental & Cancer Biology, Oregon Health & Science University, 2730 SW Moody Ave, Portland, OR, 97201, USA
| | - Simone Heimpel
- Campus of Applied Science, University of Applied Sciences Würzburg-Schweinfurt, Münzstraße 12, D-97070, Würzburg, Germany
| | - Edith Winkler
- Institute of Physical Biochemistry, University of Munich, Schillerstrasse 44, D-80336, Munich, Germany
| | - Doerthe Druhmann
- Institute of Physical Biochemistry, University of Munich, Schillerstrasse 44, D-80336, Munich, Germany
| | - Karina Frischmuth
- Institute of Physical Biochemistry, University of Munich, Schillerstrasse 44, D-80336, Munich, Germany
| | - Frits Kamp
- Institute of Physical Biochemistry, University of Munich, Schillerstrasse 44, D-80336, Munich, Germany
| | - Shu-Gui Huang
- BioAssay Systems, 3191 Corporate Place, Hayward, CA, 94545, USA.
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Tian XY, Ma S, Tse G, Wong WT, Huang Y. Uncoupling Protein 2 in Cardiovascular Health and Disease. Front Physiol 2018; 9:1060. [PMID: 30116205 PMCID: PMC6082951 DOI: 10.3389/fphys.2018.01060] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 07/16/2018] [Indexed: 12/22/2022] Open
Abstract
Uncoupling protein 2 (UCP2) belongs to the family of mitochondrial anion carrier proteins. It uncouples oxygen consumption from ATP synthesis. UCP2 is ubiquitously expressed in most cell types to reduce oxidative stress. It is tightly regulated at the transcriptional, translational, and post-translational levels. UCP2 in the cardiovascular system is being increasingly recognized as an important molecule to defend against various stress signals such as oxidative stress in the pathology of vascular dysfunction, atherosclerosis, hypertension, and cardiac injuries. UCP2 protects against cellular dysfunction through reducing mitochondrial oxidative stress and modulation of mitochondrial function. In view of the different functions of UCP2 in various cell types that contribute to whole body homeostasis, cell type-specific modification of UCP2 expression may offer a better approach to help understanding how UCP2 governs mitochondrial function, reactive oxygen species production and transmembrane proton leak and how dysfunction of UCP2 participates in the development of cardiovascular diseases. This review article provided an update on the physiological regulation of UCP2 in the cardiovascular system, and also discussed the involvement of UCP2 deficiency and associated oxidative stress in the pathogenesis of several common cardiovascular diseases. Drugs targeting UCP2 expression and activity might serve another effective strategy to ameliorate cardiovascular dysfunction. However, more detailed mechanistic study will be needed to dissect the role of UCP2, the regulation of UCP2 expression, and the cellular responses to the changes of UCP2 expression in normal and stressed situations at different stages of cardiovascular diseases.
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Affiliation(s)
- Xiao Yu Tian
- School of Biomedical Sciences, Institute of Vascular Medicine, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Shuangtao Ma
- Division of Nanomedicine and Molecular Intervention, Department of Medicine, Michigan State University, East Lansing, MI, United States
| | - Gary Tse
- Department of Medicine and Therapeutics, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Wing Tak Wong
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Yu Huang
- School of Biomedical Sciences, Institute of Vascular Medicine, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
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Gamboa R, Huesca-Gómez C, López-Pérez V, Posadas-Sánchez R, Cardoso-Saldaña G, Medina-Urrutia A, Juárez-Rojas JG, Soto ME, Posadas-Romero C, Vargas-Alarcón G. The UCP2 -866G/A, Ala55Val and UCP3 -55C/T polymorphisms are associated with premature coronary artery disease and cardiovascular risk factors in Mexican population. Genet Mol Biol 2018; 41:371-378. [PMID: 29786102 PMCID: PMC6082227 DOI: 10.1590/1678-4685-gmb-2017-0008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 10/18/2017] [Indexed: 11/26/2022] Open
Abstract
We examined the role of UCP gene polymorphisms as susceptibility markers for premature coronary artery disease (pCAD). The UCP2 Ala55Val (C/T rs660339), UCP2 -866G/A (rs659366), and UCP3 -55C/T (rs1800849) polymorphisms were genotyped in 948 patients with pCAD, and 763 controls. The distribution of the UCP2 A55V (C/T rs660339) and UCP3 -55 (rs1800849) was similar in patients and controls. However, under a recessive model, the UCP2 -866 (rs659366) A allele was associated with increased risk of developing pCAD (OR = 1.43, Pc = 0.003). On the other hand, patients with pCAD and UCP2 A55V (rs660339) TT showed high levels of visceral abdominal fat (VAF) (Pc = 0.002), low levels of subcutaneous abdominal fat (SAF) (Pc = 0.001) and high VAT/SAT ratio (Pc < 0.001). Also, patients with UCP2 -866 (rs659366) AA showed increased levels of VAF (Pc = 0.003), low levels of SAF (Pc = 0.001) and a high VAT/SAT ratio (Pc = 0.002), whereas patients with the UCP3 -55 (rs1800849) TT presented high levels of VAF (Pc = 0.002). The results suggest the association of the UCP2 -866 (rs659366) polymorphism with risk of developing pCAD. Some polymorphisms were associated with abdominal fat levels and cardiovascular risk factors.
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Affiliation(s)
- Ricardo Gamboa
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of PhysiologyMexicoD.F.MexicoDepartment of Physiology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Claudia Huesca-Gómez
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of PhysiologyMexicoD.F.MexicoDepartment of Physiology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Vanessa López-Pérez
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of PhysiologyMexicoD.F.MexicoDepartment of Physiology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Rosalinda Posadas-Sánchez
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of EndocrinologyMexicoD.F.MexicoDepartment of Endocrinology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Guillermo Cardoso-Saldaña
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of EndocrinologyMexicoD.F.MexicoDepartment of Endocrinology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Aida Medina-Urrutia
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of EndocrinologyMexicoD.F.MexicoDepartment of Endocrinology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Juan Gabriel Juárez-Rojas
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of EndocrinologyMexicoD.F.MexicoDepartment of Endocrinology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - María Elena Soto
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of ImmunologyMexicoD.F.MexicoDepartment of Immunology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Carlos Posadas-Romero
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of EndocrinologyMexicoD.F.MexicoDepartment of Endocrinology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
| | - Gilberto Vargas-Alarcón
- Instituto Nacional de
CardiologíaInstituto Nacional de
CardiologíaDepartment of Molecular
BiologyMexicoD.F.MexicoDepartment of Molecular Biology, Instituto
Nacional de Cardiología “Ignacio Chávez”, Mexico D.F., Mexico
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Zhang Q, Wang SP, Li LL, Zhang Y. Effects of mitochondrial uncoupling protein 2 inhibition by Genipin on rat bone marrow mesenchymal stem cells under hypoxia and serum deprivation (H/SD) conditions. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2017; 10:10047-10055. [PMID: 31966895 PMCID: PMC6965974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 03/20/2017] [Indexed: 06/10/2023]
Abstract
Bone marrow-derived mesenchymal stem cells (BMSCs) have shown great promise for ischemic tissue repair. However, poor viability of transplanted BMSCs within ischemic tissues has limited their therapeutic potential. Numerous evidences suggested that reactive oxygen species (ROS) generated and apoptosis play an important role in regulation BMSCs loss at the ischemic site. Uncoupling protein 2 (UCP2), a member of the anion carrier superfamily of mitochondrial inner membrane and high expression in stem cells, has been reported to influence mitochondrial ROS production and regulate the energy metabolism. However the exact roles of UCP2 in regulation the BMSCs apoptosis are still not clear. In our study, we determined the functions of UCP2 in BMSCs from SD rats. Genipin, a special UCP2 inhibitor, was added into the cultural medium to reduce the UCP2 expression in BMSCs. Apoptosis was induced by the specific apoptotic insult hypoxia and serum deprivation (SD). There was no significant differences in ATP level in BMSCs from Genipin treatment group as compared with other treatment groups. But, the levels of Reactive oxygen species (ROS) and malondialdehyde (MDA) content in BMSCs treated with Genipin were significant higher than other groups (P<0.05). Furthermore, the level of BMSCs apoptosis was much higher in H/SD and 50 μM Genipin treatment group (31.93% ± 0.16) than H/SD treatment (17.59 ± 0.69) or control group (5.79 ± 0.04) (P<0.05). In addition, Bax and caspase3 activation were elevated after treatment with Genipin (P<0.05). However, the level of anti-apoptotic protein Bcl2 was significantly declined after treatment with Genipin (P<0.05). Taken together, our findings indicate that inhibitionof UCP2 by Genipin enhanced the BMSCs apoptosis under H/SD conditions.
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Affiliation(s)
- Qi Zhang
- Department of Cardiology, The Second Affiliated Hospital of Harbin Medical UniversityHeilongjiang Province, China
- First Department of Cardiology, Central Hospital of Jiamusi CityHeilongjiang Province, China
| | - Shi-Peng Wang
- Department of Cardiology, The Second Affiliated Hospital of Harbin Medical UniversityHeilongjiang Province, China
| | - Li-Li Li
- Department of Cardiology, The Second Affiliated Hospital of Harbin Medical UniversityHeilongjiang Province, China
| | - Yao Zhang
- Department of Cardiology, The Second Affiliated Hospital of Harbin Medical UniversityHeilongjiang Province, China
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Ge H, Zhang F, Duan P, Zhu N, Zhang J, Ye F, Shan D, Chen H, Lu X, Zhu C, Ge R, Lin Z. Mitochondrial Uncoupling Protein 2 in human cumulus cells is associated with regulating autophagy and apoptosis, maintaining gap junction integrity and progesterone synthesis. Mol Cell Endocrinol 2017; 443:128-137. [PMID: 28089824 DOI: 10.1016/j.mce.2017.01.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 01/11/2017] [Accepted: 01/12/2017] [Indexed: 01/24/2023]
Abstract
To explore the roles of mitochondrial Uncoupling Protein 2 (UCP2) in cumulus cells (CCs), human CCs were cultured in vitro, and the UCP2 was inhibited by treatment with Genipin, a special UCP inhibitor, or by RNA interference targeting UCP2. No significant differences in adenosine triphosphate levels and the ratio of ADP/ATP were observed after UCP2 inhibition. UCP2 inhibition caused a significant increase in cellular oxidative damage, which was reflected in alterations to several key parameters, including reactive oxygen species (ROS) and lipid peroxidation levels and the ratio of reduced GSH to GSSG. UCP2 blocking resulted in an obvious increase in active Caspase-3, accompanied by the decline of proactive Caspase-3 and a significant increase in the LC3-II/LC3-I ratio, suggesting that UCP2 inhibition triggered cellular apoptosis and autophagy. The mRNA and protein expression of connexin 43 (Cx43), a gap junction channel protein, were significantly reduced after treatment with Genipin or siRNA. The progesterone level in the culture medium was also significantly decreased after UCP2 inhibition. Our data indicated that UCP2 plays highly important roles in mediating ROS production and regulating apoptosis and autophagy, as well as maintaining gap junction integrity and progesterone synthesis, which suggests that UCP2 is involved in the regulation of follicle development and early embryo implantation and implies that it might serve as a potential biomarker for oocyte quality and competency.
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Affiliation(s)
- Hongshan Ge
- Center for Reproductive Medicine, Department of Obstetrics and Gynaecology, Taizhou People's Hospital, The Fifth Hospital Affiliated Nantong University, Taizhou, Jiangsu Province, 225300, People's Republic of China; The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China.
| | - Fan Zhang
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Ping Duan
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Nan Zhu
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Jiayan Zhang
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Feijun Ye
- Maternal and Child Health Hospital, Zhoushan Hospital Affiliated Wenzhou Medical University, Zhejiang Province, 316100, People's Republic of China
| | - Dan Shan
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Hua Chen
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - XiaoSheng Lu
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - ChunFang Zhu
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Renshan Ge
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Zhenkun Lin
- The Second Affiliated Hospital and YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China.
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10
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Effects of Mitochondrial Uncoupling Protein 2 Inhibition by Genipin in Human Cumulus Cells. BIOMED RESEARCH INTERNATIONAL 2015; 2015:323246. [PMID: 26356408 PMCID: PMC4556840 DOI: 10.1155/2015/323246] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 03/13/2015] [Accepted: 03/31/2015] [Indexed: 01/14/2023]
Abstract
UCP2 plays a physiological role by regulating mitochondrial biogenesis, maintaining energy balance, ROS elimination, and regulating cellular autophagy in numerous tissues. But the exact roles of UCP2 in cumulus cells are still not clear. Genipin, a special UCP2 inhibitor, was added into the cultural medium to explore the roles of UCP2 in human cumulus cells. There were no significant differences in ATP and mitochondrial membrane potential levels in cumulus cells from UCP2 inhibiting groups as compared with the control. The levels of ROS and Mn-SOD were markedly elevated after UCP2 inhibited Genipin. However, the ratio of reduced GSH to GSSG significantly declined after treatment with Genipin. UCP2 inhibition by Genipin also resulted in obvious increase in the active caspase-3, which accompanied the decline of caspase-3 mRNA. The level of progesterone in culture medium declined obviously after Genipin treatment. But there was no significant difference in estradiol concentrations. This study indicated that UCP2 is expressed in human cumulus cells and plays important roles on mediate ROS production, apoptotic process, and steroidogenesis, suggesting UCP2 may be involved in regulation of follicle development and oocyte maturation and quality.
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Shen Y, Wen Z, Wang N, Zheng Z, Liu K, Xia X, Gu Q, Shi Y, Xu X. Investigation of variants in UCP2 in Chinese type 2 diabetes and diabetic retinopathy. PLoS One 2014; 9:e112670. [PMID: 25396419 PMCID: PMC4232517 DOI: 10.1371/journal.pone.0112670] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 10/10/2014] [Indexed: 12/11/2022] Open
Abstract
Purpose The aim of this study was to investigate variants in UCP2 genes in type 2 diabetes mellitus (DM) and diabetic retinopathy (DR) in Chinese population. Materials and Methods We conducted a single nucleotide polymorphism-based and haplotype-based case-control study between the variants of UCP2 and DM and between the variants of UCP2 and DR in 479 Chinese patients with type 2 DM and 479 control subjects without DM. Two SNPs (rs660339 and rs659366) were selected as genetic markers. Results The risk allele C at UCP2 rs660339 was closely associated with DM in Chinese population. There was significant difference in rs660339 between DM and controls (P = 0.0016; OR [95%CI] = 1.37 (1.14–1.65)). Subjects who were homozygous of the C allele were more likely to develop DM. The frequency of C allele was higher in DM (58%) than in control (51%). But this locus didn't have a definite effect on the onset of non-proliferative diabetic retinopathy (NPDR) (P = 0.44; OR [95%CI] = 0.80 (0.56–1.14)) and proliferative diabetic retinopathy (PDR) (P = 1.00; OR [95%CI] = 0.99 (0.74–1.34)) comparing to subjects with DM without retinopathy (DWR), respectively. Moreover, the UCP2 rs659366 polymorphism showed no significant difference between DM and control (P = 0.66; OR [95%CI] = 1.10 (0.91–1.32)). However, there was a significant difference between PDR and DWR (P = 0.016; OR [95%CI] = 0.66 (0.49–0.90)), but there was no difference between NPDR and DWR (P = 1.00; OR [95%CI] = 0.96 (0.67–1.37)). Participants who carried the G allele at rs659366 were more likely to develop PDR. For the haplotype, C-A was present more frequently in DM than in control (16% vs 7%), indicating that it was risky, and T-A was present less in DM than in control (29% vs 35%). Haplotype frequencies in DR and DWR showed no significant difference (P = 0.068). Conclusion It was indicated that UCP2 may be implicated in the pathogenesis of type 2 DM and DR in Chinese population.
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Affiliation(s)
- Yinchen Shen
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China, Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China
| | - Zujia Wen
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Ning Wang
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China, Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China
- * E-mail:
| | - Zhi Zheng
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China, Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China
| | - Kun Liu
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China, Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China
| | - Xin Xia
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China, Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China
| | - Qing Gu
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China, Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China
| | - Yongyong Shi
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Xun Xu
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China, Shanghai Key Laboratory of Fundus Disease, Shanghai, People's Republic of China
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Brondani LDA, de Almeida Brondani L, de Souza BM, Assmann TS, Bouças AP, Bauer AC, Canani LH, Crispim D. Association of the UCP polymorphisms with susceptibility to obesity: case-control study and meta-analysis. Mol Biol Rep 2014; 41:5053-67. [PMID: 24752406 DOI: 10.1007/s11033-014-3371-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 04/05/2014] [Indexed: 12/25/2022]
Abstract
This paper describes a case-control study and a meta-analysis performed to evaluate if the following polymorphisms are associated with presence of obesity: -3826A/G (UCP1); -866G/A, Ala55Val and Ins/Del (UCP2) and -55C/T (UCP3). The case-control study enrolled 282 obese and 483 non-obese patients with type 2 diabetes. A literature search was made to identify all studies that evaluated associations between UCP1-3 polymorphisms and obesity. In the case-control study the distributions of the UCP variants did not differ between obese and non-obese groups (P > 0.05). Forty-seven studies were eligible for the meta-analysis and the results showed that the UCP2 -866G/A and UCP3 -55C/T polymorphisms were associated with protection to obesity in Europeans (OR = 0.89, 95% CI 0.82-0.97 and OR = 0.88, 95% CI 0.80-0.97, respectively). The UCP2 Ala55 val polymorphism was associated with obesity in Asians (OR = 1.61, 95% CI 1.13-2.30). The UCP2 Ins/Del polymorphism was associated with obesity mainly in Europeans (OR = 1.19, 95% CI 1.00-1.42). There was no significant association of the UCP1 -3826A/G polymorphism with obesity. In our case-control study we were not able to demonstrate any association between UCP polymorphisms and obesity in T2DM patients; however, in the meta-analysis we detected a significant association of UCP2 -866G/A, Ins/Del, Ala55Val and UCP3 -55C/T polymorphisms with obesity.
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