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Jung YR, Yim JH, Lee YJ, Lee SB, Heo SY, Bae SG, Kim KT, Kwon YS, Park SJ, Park JK, Kim TH. Decreased SMP30 Expression Is Related With EMT in the Kidneys of Two Siberian Tigers With CKD. In Vivo 2024; 38:226-234. [PMID: 38148068 PMCID: PMC10756483 DOI: 10.21873/invivo.13429] [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: 08/02/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 12/28/2023]
Abstract
BACKGROUND/AIM Chronic kidney disease (CKD) is one of the most common causes of mortality in wild non-domestic felidae. The molecular mechanism regulating renal fibrosis in nephropathy is not fully understood especially in the felidae. This study aimed to elucidate senescence marker protein 30 (SMP30) expression patterns and its relationship with epithelial-mesenchymal transition (EMT) by immunostaining in two necropsied Siberian tigers (Panthera tigris altaica) with CKD. MATERIALS AND METHODS Two kidney samples from male Siberian tigers were fixed and tissue sections were stained for histopathological assay. RESULTS In CKD, renal tubular epithelial cells lost their tubular structures surrounded by severe interstitial fibrosis and were detached from the basement membrane. These damaged cells resembled the morphology of mesenchymal cells and showed much lower SMP30 expression compared with intact tubular epithelial cells. These cells also expressed vimentin, which is specifically expressed by mesenchymal cells, and through double staining, it was observed that vimentin was expressed in the tubular epithelial cells where SMP30 was not expressed. In addition, double-positive expression of pan-cytokeratin (pan-CK) and vimentin was found in damaged epithelial cells with mesenchymal features. CONCLUSION We demonstrated possible evidence to understand the role of SMP30 as a new pivotal factor and the possibility of decreased SMP30 as a potential indicator of EMT at the end stage of CKD.
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Affiliation(s)
- Yi-Rang Jung
- Kyungpook National University, College of Veterinary Medicine, Department of Veterinary Pathology, Daegu, Republic of Korea
- Daegu Health College, Department of Companion Animal Health Management, Daegu, Republic of Korea
| | - Jae-Hyuk Yim
- Kyungpook National University, College of Veterinary Medicine, Department of Veterinary Pathology, Daegu, Republic of Korea
| | - Young-Jin Lee
- Kyungpook National University, College of Veterinary Medicine, Department of Veterinary Pathology, Daegu, Republic of Korea
| | - Sae-Bom Lee
- Baekdudaegan National Arboretum, Siberian Tiger Conservation Center, Bonghwa, Republic of Korea
| | - Sung-Yong Heo
- Baekdudaegan National Arboretum, Siberian Tiger Conservation Center, Bonghwa, Republic of Korea
| | - Seul-Gi Bae
- Kyungpook National University, College of Veterinary Medicine, Daegu, Republic of Korea
| | - Kyoo-Tae Kim
- Kyungpook National University, College of Veterinary Medicine, Daegu, Republic of Korea
| | - Young-Sam Kwon
- Kyungpook National University, College of Veterinary Medicine, Daegu, Republic of Korea
| | - Sang-Joon Park
- Kyungpook National University, College of Veterinary Medicine, Daegu, Republic of Korea
| | - Jin-Kyu Park
- Kyungpook National University, College of Veterinary Medicine, Department of Veterinary Pathology, Daegu, Republic of Korea;
| | - Tae-Hwan Kim
- Kyungpook National University, College of Veterinary Medicine, Department of Veterinary Pathology, Daegu, Republic of Korea;
- Baekdudaegan National Arboretum, Siberian Tiger Conservation Center, Bonghwa, Republic of Korea
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Yin S, Zhou Z, Fu P, Jin C, Wu P, Ji C, Shan Y, Shi L, Xu M, Qian H. Roles of extracellular vesicles in ageing-related chronic kidney disease: demon or angel. Pharmacol Res 2023:106795. [PMID: 37211241 DOI: 10.1016/j.phrs.2023.106795] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/02/2023] [Accepted: 05/16/2023] [Indexed: 05/23/2023]
Abstract
Ageing is a universal and unavoidable phenomenon that significantly increases the risk of developing chronic kidney disease (CKD). It has been reported that ageing is associated with functional disruption and structural damage to the kidneys. Extracellular vesicles (EVs), which are nanoscale membranous vesicles containing lipids, proteins, and nucleic acids, are secreted by cells into the extracellular spaces. They have diverse functions such as repairing and regenerating different forms of ageing-related CKD and playing a crucial role in intercellular communication. This paper reviews the etiology of ageing in CKD, with particular attention paid to the roles of EVs as carriers of ageing signals and anti-ageing therapeutic strategies in CKD. In this regard, the double-edged role of EVs in ageing-related CKD is examined, along with the potential for their application in clinical settings.
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Affiliation(s)
- Siqi Yin
- Institute of Translational Medicine of Jiangsu University, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu, China; Key Laboratory of Laboratory Medicine of Jiangsu Province, Department of laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Zixuan Zhou
- Institute of Translational Medicine of Jiangsu University, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu, China; Key Laboratory of Laboratory Medicine of Jiangsu Province, Department of laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Peiwen Fu
- Key Laboratory of Laboratory Medicine of Jiangsu Province, Department of laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Chaoying Jin
- Department of Plastic and Aesthetic Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang, China
| | - Peipei Wu
- Department of Clinical Laboratory, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, China
| | - Cheng Ji
- Institute of Translational Medicine of Jiangsu University, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu, China; Key Laboratory of Laboratory Medicine of Jiangsu Province, Department of laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Yunjie Shan
- Key Laboratory of Laboratory Medicine of Jiangsu Province, Department of laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Linru Shi
- Key Laboratory of Laboratory Medicine of Jiangsu Province, Department of laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Min Xu
- Institute of Translational Medicine of Jiangsu University, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu, China.
| | - Hui Qian
- Institute of Translational Medicine of Jiangsu University, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, Jiangsu, China; Key Laboratory of Laboratory Medicine of Jiangsu Province, Department of laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, China.
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Ascorbate Is a Primary Antioxidant in Mammals. Molecules 2022; 27:molecules27196187. [PMID: 36234722 PMCID: PMC9572970 DOI: 10.3390/molecules27196187] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/18/2022] [Accepted: 09/19/2022] [Indexed: 11/19/2022] Open
Abstract
Ascorbate (vitamin C in primates) functions as a cofactor for a number of enzymatic reactions represented by prolyl hydroxylases and as an antioxidant due to its ability to donate electrons, which is mostly accomplished through non-enzymatic reaction in mammals. Ascorbate directly reacts with radical species and is converted to ascorbyl radical followed by dehydroascorbate. Ambiguities in physiological relevance of ascorbate observed during in vivo situations could be attributed in part to presence of other redox systems and the pro-oxidant properties of ascorbate. Most mammals are able to synthesize ascorbate from glucose, which is also considered to be an obstacle to verify its action. In addition to animals with natural deficiency in the ascorbate synthesis, such as guinea pigs and ODS rats, three strains of mice with genetic removal of the responsive genes (GULO, RGN, or AKR1A) for the ascorbate synthesis have been established and are being used to investigate the physiological roles of ascorbate. Studies using these mice, along with ascorbate transporter (SVCT)-deficient mice, largely support its ability in protection against oxidative insults. While combined actions of ascorbate in regulating epigenetics and antioxidation appear to effectively prevent cancer development, pharmacological doses of ascorbate and dehydroascorbate may exert tumoricidal activity through redox-dependent mechanisms.
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Cadmium-Induced Kidney Injury in Mice Is Counteracted by a Flavonoid-Rich Extract of Bergamot Juice, Alone or in Association with Curcumin and Resveratrol, via the Enhancement of Different Defense Mechanisms. Biomedicines 2021; 9:biomedicines9121797. [PMID: 34944613 PMCID: PMC8698830 DOI: 10.3390/biomedicines9121797] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 11/26/2021] [Accepted: 11/28/2021] [Indexed: 12/23/2022] Open
Abstract
Cadmium (Cd) represents a public health risk due to its non-biodegradability and long biological half-life. The main target of Cd is considered the kidney, where it accumulates. No effective treatment for Cd poisoning is available so that several therapeutic approaches were proposed to prevent damages after Cd exposure. We evaluated the effects of a flavonoid-rich extract of bergamot juice (BJe), alone or in association with curcumin (Cur) and resveratrol (Re), in the kidney of mice exposed to cadmium chloride (CdCl2). Male mice were administered with CdCl2 and treated with Cur, Re, or BJe alone or in combination for 14 days. The kidneys were processed for biochemical, structural and morphometric evaluation. Cd treatment significantly increased urea nitrogen and creatinine levels, along with tp53, Bax, Nos2 and Il1b mRNA, while reduced that of Bcl2, as well as glutathione (GSH) content and glutathione peroxidase (GPx) activity. Moreover, Cd caused damages to glomeruli and tubules, and increased Nrf2, Nqo1 and Hmox1 gene expression. Cur, Re and BJe at 40 mg/kg significantly improved all parameters, while BJe at 20 mg/kg showed a lower protective effect. After treatment with the associations of the three nutraceuticals, all parameters were close to normal, thus suggesting a new potential strategy in the protection of renal functions in subjects exposed to environmental toxicants.
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Murata T, Hashimoto K, Kohno S, Takahashi C, Yamaguchi M, Ito C, Masataka I, Kojima R, Hikita K, Kaneda N. Chemical inducer of regucalcin attenuates lipopolysaccharide-induced inflammatory responses in pancreatic MIN6 β-cells and RAW264.7 macrophages. FEBS Open Bio 2021; 12:175-191. [PMID: 34709731 PMCID: PMC8727933 DOI: 10.1002/2211-5463.13321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 07/28/2021] [Accepted: 10/27/2021] [Indexed: 11/27/2022] Open
Abstract
We previously isolated derrisfolin A, a novel rotenoid derivative, from the stems of Derris
trifoliata Lour. (Leguminosae). Here, we report that derrisfolin A induces the expression of endogenous regucalcin (RGN) protein in both pancreatic MIN6 β‐cells and RAW264.7 macrophages. Induction of RGN expression by derrisfolin A or retrovirus‐mediated gene transfer in MIN6 cells and RAW264.7 macrophages significantly decreased lipopolysaccharide (LPS)‐induced mRNA expression of Nos2, Il1b, and Tnf via nuclear factor‐κB activation; reduced LPS‐induced apoptosis in MIN6 cells, accompanied by decreased production of nitric oxide, interleukin‐1β, and tumor necrosis factor‐α; and attenuated generation of LPS‐induced reactive oxygen species, malondialdehyde, and 3‐nitrotyrosine in MIN6 cells. Additionally, in co‐cultures of MIN6 cells with RAW264.7 macrophages in the presence of LPS, induction of RGN expression by derrisfolin A or retrovirus‐mediated gene transfer in RAW264.7 macrophages attenuated apoptosis and oxidative/nitrosative stress in MIN6 cells. These results suggest that the induction of RGN expression in MIN6 cells was effective in suppressing LPS‐induced inflammatory cytotoxicity and that in co‐culture conditions, the induction of RGN expression in RAW264.7 macrophages blocked LPS‐induced paracrine effects of RAW264.7 macrophages on inflammatory cytotoxicity in MIN6 cells. Our findings suggest that derrisfolin A, a chemical inducer of RGN, might be useful for developing a new drug against macrophage‐associated β‐cell inflammation in type 2 diabetes.
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Affiliation(s)
- Tomiyasu Murata
- Laboratory of Molecular Biology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Kazunori Hashimoto
- Laboratory of Molecular Biology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Susumu Kohno
- Division of Oncology and Molecular Biology, Cancer Research Institute, Kanazawa University, Japan
| | - Chiaki Takahashi
- Division of Oncology and Molecular Biology, Cancer Research Institute, Kanazawa University, Japan
| | - Masayoshi Yamaguchi
- Cancer Biology Program, University of Hawaii Cancer Center, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Chihiro Ito
- Laboratory of Natural Products Chemistry, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Itoigawa Masataka
- School of Sport and Health Science, Tokai Gakuen University, Miyoshi, Japan
| | - Roji Kojima
- Laboratory of Analytical Pharmacy, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Kiyomi Hikita
- Department of Pharmacy, Faculty of Pharmacy, Gifu University of Medical Science, Kani, Japan
| | - Norio Kaneda
- Laboratory of Molecular Biology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
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Zhang L, Zhu T, He F, Li X. Senescence marker protein 30 (SMP30) protects against high glucose-induced apoptosis, oxidative stress and inflammatory response in retinal ganglion cells by enhancing Nrf2 activation via regulation of Akt/GSK-3β pathway. Int Immunopharmacol 2021; 101:108238. [PMID: 34688152 DOI: 10.1016/j.intimp.2021.108238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 09/23/2021] [Accepted: 10/05/2021] [Indexed: 11/26/2022]
Abstract
Senescence marker protein 30 (SMP30) is an aging-related protein that participates in the regulation of tissue damage under various pathological conditions. However, the role of SMP30 in mediating high glucose (HG)-induced injury of retinal ganglion cells (RGCs) has not been fully determined. We found that SMP30 expression declined during HG stimulation in RGCs. Cellular functional studies showed that the up-regulation of SMP30 dramatically prohibited HG-evoked apoptosis, oxidative stress and inflammatory response in RGCs. Mechanism research reported that SMP30 overexpression led to the enhancement of nuclear factor erythroid 2-related factor (Nrf2) activation in HG-stimulated RGCs. Moreover, SMP30 overexpression enhanced the phosphorylation of Akt and glucogen synthase kinase-3β (GSK-3β), and the suppression of Akt markedly abolished SMP30-mediated Nrf2 activation in HG-stimulated RGCs. Additionally, the suppression of Nrf2 substantially reversed SMP30-overexpression-induced anti-HG injury effects in RGCs. Overall, these findings suggest that SMP30 protects against HG injury of RGCs by potentiating Nrf2 through regulation of the Akt/GSK-3β pathway. Our work underscores that SMP30/Akt/GSK-3β/Nrf2 may exert a vital role in mediating the injury of RGCs during diabetic retinopathy.
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Affiliation(s)
- Le Zhang
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an 710068, Shaanxi Province, China; Department of Ophthalmology, Northwest Woman's and Children's Hospital, Xi'an 710061, Shaanxi Province, China
| | - Tao Zhu
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an 710068, Shaanxi Province, China
| | - Fang He
- The 8th Medical Center of the PLA General Hospital, Beijing 100091, China
| | - Xueying Li
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an 710068, Shaanxi Province, China.
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Protective effects of Quercetin and Resveratrol on aging markers in kidney under high glucose condition: in vivo and in vitro analysis. Mol Biol Rep 2021; 48:5435-5442. [PMID: 34273031 DOI: 10.1007/s11033-021-06550-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Resveratrol and Quercetin as powerful herbal antioxidant reduce kidney complications of diabetes. The purpose of this study was to evaluate the protective effects of Quercetin and Resveratrol on aging markers in high glucose condition. METHODS AND RESULTS In this study, HEK-293 cells and kidney tissue of male Wistar rats were used in hyperglycemia condition. Quercetin and Resveratrol for cell culture and in vivo evaluation were used. Amount of methylglyoxal and the gene and protein expression of the Senescence Marker Protein30 (SMP30) were measured using qRT-PCR and ELISA, respectively. High glucose condition in kidney cell and tissue caused increase in glyoxal amount compared to control sample. Treatment with Resveratrol and/or Quercetin significantly decreased the amount of methylglyoxal in a dose-dependent manner. SMP30 expression significantly decreased compare to control group while treatment with Resveratrol and/or Quercetin considerably increased expression level of the protein. Six weeks treatment with Quercetin and Resveratrol had more beneficial effects on aging markers compared with three weeks. CONCLUSIONS According to the results, it can be concluded that resveratrol and quercetin, as potent herbal antioxidants, may have significant effects in reducing the complications of diabetes in kidneys, as well as preventing the aging of the kidney cells.
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Liu W, Zhao H, Su Y, Wang K, Li J, Xue S, Sun X, Qiu Z. Senescence marker protein 30 confers neuroprotection in oxygen-glucose deprivation/reoxygenation-injured neurons through modulation of Keap1/Nrf2 signaling: Role of SMP30 in OGD/R-induced neuronal injury. Hum Exp Toxicol 2020; 40:472-482. [PMID: 32909858 DOI: 10.1177/0960327120954243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Senescence marker protein 30 (SMP30) is a senescence marker molecule and identified as a calcium regulatory protein. Currently, SMP30 has emerged as a cytoprotective protein in a wide range of cell types. However, the role of SMP30 in regulating neuronal survival during cerebral ischemia/reperfusion injury remains unclear. In the present study, we aimed to investigate the biological function and regulatory mechanism of SMP30 on neuronal survival using a cellular model induced by oxygen-glucose deprivation/reoxygenation (OGD/R). The results showed that SMP30 expression was significantly decreased by OGD/R exposure in neurons. Functional experiments demonstrated that SMP30 overexpression significantly rescued the decreased cell viability and attenuated the apoptosis and reactive oxygen species generation in OGD/R-exposed neurons. By contrast, SMP30 knockdown exhibited the opposite effect. Mechanism research revealed that SMP30 overexpression contributed to the activation of nuclear factor erythroid 2-related factor (Nrf2)/antioxidant response element (ARE) signaling associated with downregulation of Kelch-like ECH-associated protein (Keap1). Keap1 overexpression or Nrf2 silencing significantly reversed SMP30-mediated neuroprotection against OGD/R-induced injury. Overall, these findings demonstrate that SMP30 overexpression protects neurons from OGD/R-induced apoptosis and oxidative stress by enhancing Nrf2/ARE antioxidant signaling via inhibition of Keap1. These data highlight the importance of the SMP30/Keap1/Nrf2/ARE signaling axis in regulating neuronal survival during cerebral ischemia/reperfusion injury.
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Affiliation(s)
- Wenxiong Liu
- Department of Anesthesiology, The Hospital of Xidian Group, Xi'an, Shaanxi, China.,* These authors contributed equally to this work and shared the first authorship
| | - Haikang Zhao
- Department of Neurosurgery, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China.,* These authors contributed equally to this work and shared the first authorship
| | - Yuqiang Su
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
| | - Kefeng Wang
- Clinical Training Center, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
| | - Jing Li
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
| | - Sha Xue
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
| | - Xiaopeng Sun
- Department of Otolaryngology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
| | - Zhengguo Qiu
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
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Murata T, Yamaguchi M, Kohno S, Takahashi C, Risa W, Hatori K, Hikita K, Kaneda N. Regucalcin enhances adipocyte differentiation and attenuates inflammation in 3T3-L1 cells. FEBS Open Bio 2020; 10:1967-1984. [PMID: 32783343 PMCID: PMC7530391 DOI: 10.1002/2211-5463.12947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/17/2020] [Accepted: 08/10/2020] [Indexed: 01/18/2023] Open
Abstract
Dysregulation of adipocyte differentiation and dysfunction play key roles in the pathogenesis of obesity and associated disorders such as diabetes and metabolic syndrome, and as such, a better understanding of the molecular mechanism of adipogenesis may help to elucidate the pathological condition of obesity and its associated disorders. Regucalcin (RGN) plays multiple regulatory roles in intracellular Ca2+ signaling pathways in mammalian cells. Here, we report that overexpression of RGN enhances lipid accumulation in 3T3‐L1 adipocyte cells after adipogenic stimulation, accompanied by upregulation of adipocyte differentiation marker proteins. In contrast, genetic disruption of RGN inhibited adipogenic stimulation‐induced differentiation of 3T3‐L1 cells. Furthermore, RGN overexpression in differentiated 3T3‐L1 adipocytes blocked inflammatory crosstalk between 3T3‐L1 adipocytes and RAW264.7 macrophages in a transwell coculture system. Knockdown of RGN expression in cocultured 3T3‐L1 adipocytes enhanced their susceptibility to RAW264.7 macrophage‐mediated inflammation. These results suggest that RGN is required for 3T3‐L1 adipocyte differentiation and that it exerts anti‐inflammatory activity against 3T3‐L1 adipocyte inflammation after coculture with RAW264.7 macrophages. Thus, RGN may be a novel regulator of adipocyte differentiation and act as a suppressor of inflammation in macrophage‐infiltrated adipocyte tissue.
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Affiliation(s)
- Tomiyasu Murata
- Laboratory of Analytical Neurobiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Masayoshi Yamaguchi
- Cancer Biology Program, University of Hawaii Cancer Center, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Susumu Kohno
- Division of Oncology and Molecular Biology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Chiaki Takahashi
- Division of Oncology and Molecular Biology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Watanabe Risa
- Laboratory of Analytical Neurobiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Kanna Hatori
- Laboratory of Analytical Neurobiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Kiyomi Hikita
- Laboratory of Analytical Neurobiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Norio Kaneda
- Laboratory of Analytical Neurobiology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
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Maique J, Flores B, Shi M, Shepard S, Zhou Z, Yan S, Moe OW, Hu MC. High Phosphate Induces and Klotho Attenuates Kidney Epithelial Senescence and Fibrosis. Front Pharmacol 2020; 11:1273. [PMID: 32973510 PMCID: PMC7468469 DOI: 10.3389/fphar.2020.01273] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 07/31/2020] [Indexed: 12/18/2022] Open
Abstract
Cellular senescence is an irreversible cell growth arrest and is associated with aging and age-related diseases. High plasma phosphate (Pi) and deficiency of Klotho contribute to aging and kidney fibrosis, a pathological feature in the aging kidney and chronic kidney disease. This study examined the interactive role of Pi and Klotho in kidney senescence and fibrosis. Homozygous Klotho hypomorphic mice had high plasma Pi, undetectable Klotho in plasma and kidney, high senescence with massive collagen accumulation in kidney tubules, and fibrin deposits in peritubular capillaries. To examine the Pi effect on kidney senescence, a high (2%) Pi diet was given to wild-type mice. One week of high dietary Pi mildly increased plasma Pi, and upregulated kidney p16/p21 expression, but did not significantly decrease Klotho. Two weeks of high Pi intake led to increase in plasminogen activator inhibitor (PAI)-1, and decrease in kidney Klotho, but still without detectable increase in kidney fibrosis. More prolonged dietary Pi for 12 weeks exacerbated kidney senescence and fibrosis; more so in heterozygous Klotho hypomorphic mice compared to wild-type mice, and in mice with chronic kidney disease (CKD) on high Pi diet compared to CKD mice fed a normal Pi diet. In cultured kidney tubular cells, high Pi directly induced cellular senescence, injury and epithelial-mesenchymal transition, and enhanced H2O2-induced cellular senescence and injury, which were abrogated by Klotho. Fucoidan, a bioactive molecule with multiple biologic functions including senescence inhibition, blunted Pi-induced cellular senescence, oxidation, injury, epithelial-mesenchymal transition, and senescence-associated secretary phenotype. In conclusion, high Pi activates senescence through distinct but interconnected mechanisms: upregulating p16/p21 (early), and elevating plasminogen activator inhibitor-1 and downregulating Klotho (late). Klotho may be a promising agent to attenuate senescence and ameliorate age-associated, and Pi-induced kidney degeneration such as kidney fibrosis.
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Affiliation(s)
- Jenny Maique
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Brianna Flores
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Mingjun Shi
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Sierra Shepard
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Zhiyong Zhou
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Shirely Yan
- Departments of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Orson W Moe
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, United States.,Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, United States.,Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Ming Chang Hu
- Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, United States.,Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, United States
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Pallio G, Micali A, Benvenga S, Antonelli A, Marini HR, Puzzolo D, Macaione V, Trichilo V, Santoro G, Irrera N, Squadrito F, Altavilla D, Minutoli L. Myo-inositol in the protection from cadmium-induced toxicity in mice kidney: An emerging nutraceutical challenge. Food Chem Toxicol 2019; 132:110675. [PMID: 31306689 DOI: 10.1016/j.fct.2019.110675] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/21/2019] [Accepted: 07/11/2019] [Indexed: 12/22/2022]
Abstract
Cadmium (Cd) induces functional and morphological changes in kidney. Therefore, the effects of a natural nutraceutical antioxidant, myo-inositol (MI), were evaluated in mice kidneys after Cd challenge. Twenty-eight C57 BL/6 J mice were divided into these groups: 0.9% NaCl; MI (360 mg/kg/day); CdCl2 (2 mg/kg/day) plus vehicle; CdCl2 (2 mg/kg/day) plus MI (360 mg/kg/day). After 14 days, kidneys were processed for structural, biochemical and morphometric evaluation. Treatment with CdCl2 increased urea nitrogen and creatinine in serum and augmented tumor necrosis factor-α (TNF-α) and inducible nitric oxide synthase (iNOS) expression. Furthermore, monocyte chemoattractant protein-1 (MCP-1), kidney injury molecule-1 (KIM-1) and myo-inositol oxygenase (MIOX) immunoreactivity, and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) positive cells number were significantly higher than control and MI groups. Glutathione (GSH) content and glutathione peroxidase (GPx) activity were reduced and structural changes were evident. The treatment with MI significantly lowered urea nitrogen and creatinine levels, TNF-α and iNOS expression, MCP-1, KIM-1 and MIOX immunoreactivity and TUNEL positive cells number, increased GSH content and GPx activity and preserved kidney morphology. A protection of MI against Cd-induced damages in mice kidney was demonstrated, suggesting a strong antioxidant role of this nutraceutical against environmental Cd harmful effects on kidney lesions.
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Affiliation(s)
- Giovanni Pallio
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
| | - Antonio Micali
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98121, Messina, Italy.
| | - Salvatore Benvenga
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
| | - Alessandro Antonelli
- Department of Clinical and Experimental Medicine, University of Pisa, 56126, Pisa, Italy
| | - Herbert R Marini
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
| | - Domenico Puzzolo
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98121, Messina, Italy
| | - Vincenzo Macaione
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
| | - Vincenzo Trichilo
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
| | - Giuseppe Santoro
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98121, Messina, Italy
| | - Natasha Irrera
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
| | - Francesco Squadrito
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
| | - Domenica Altavilla
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98121, Messina, Italy
| | - Letteria Minutoli
- Department of Clinical and Experimental Medicine, University of Messina, 98121, Messina, Italy
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Flavocoxid, a Natural Antioxidant, Protects Mouse Kidney from Cadmium-Induced Toxicity. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:9162946. [PMID: 29849925 PMCID: PMC5932425 DOI: 10.1155/2018/9162946] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/15/2018] [Accepted: 02/25/2018] [Indexed: 12/18/2022]
Abstract
Background Cadmium (Cd), a diffused environmental pollutant, has adverse effects on urinary apparatus. The role of flavocoxid, a natural flavonoid with antioxidant activity, on the morphological and biochemical changes induced in vivo by Cd in mice kidney was evaluated. Methods C57 BL/6J mice received 0.9% NaCl alone, flavocoxid (20 mg/kg/day i.p.) alone, Cd chloride (CdCl2) (2 mg/kg/day i.p.) alone, or CdCl2 plus flavocoxid (2 mg/kg/day i.p. plus 20 mg/kg/day i.p.) for 14 days. The kidneys were processed for biochemical, structural, ultrastructural, and morphometric evaluation. Results Cd treatment alone significantly increased urea nitrogen and creatinine, iNOS, MMP-9, and pERK 1/2 expression and protein carbonyl; reduced GSH, GR, and GPx; and induced structural and ultrastructural changes in the glomeruli and in the tubular epithelium. After 14 days of treatment, flavocoxid administration reduced urea nitrogen and creatinine, iNOS, MMP-9, and pERK 1/2 expression and protein carbonyl; increased GSH, GR, and GPx; and showed an evident preservation of the glomerular and tubular structure and ultrastructure. Conclusions A protective role of flavocoxid against Cd-induced oxidative damages in mouse kidney was demonstrated for the first time. Flavocoxid may have a promising antioxidant role against environmental Cd harmful effects on glomerular and tubular lesions.
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Abstract
PURPOSE OF REVIEW Tissue hypoxia is present in kidneys from diabetic patients and constitutes a central pathway to diabetic kidney disease (DKD). This review summarizes regulation of hypoxia inducible factor (HIF) and interventions towards the same for treatment of DKD. RECENT FINDINGS In the hypoxic diabetic kidney, HIF activity and the effects of HIF signaling seem to be cell-specific. In mesangial cells, elevated glucose levels induce HIF activity by a hypoxia-independent mechanism. Elevated HIF activity in glomerular cells promotes glomerulosclerosis and albuminuria, and inhibition of HIF protects glomerular integrity. However, tubular HIF activity is suppressed and HIF activation protects mitochondrial function and prevents development of diabetes-induced tissue hypoxia, tubulointerstitial fibrosis and proteinuria. No clinical treatment targeting kidney hypoxia is currently available, but development of prolyl hydroxylase inhibitors to promote HIF activity to treat renal anemia could potentially also target diabetes-induced kidney hypoxia. SUMMARY Increasing HIF activity in the diabetic kidney may possess a novel target for treatment of DKD by improving kidney oxygen homeostasis. However, HIF-mediated glomerulosclerosis may be a concern. The kidney outcomes from the ongoing clinical trials using prolyl hydroxylase inhibitors may provide additional insights into the complex role of HIF signaling in the diabetic kidney.
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Kondo Y, Ishigami A. Involvement of senescence marker protein-30 in glucose metabolism disorder and non-alcoholic fatty liver disease. Geriatr Gerontol Int 2017; 16 Suppl 1:4-16. [PMID: 27018279 DOI: 10.1111/ggi.12722] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2015] [Indexed: 12/16/2022]
Abstract
Senescence marker protein-30 (SMP30) was found to decrease in the liver, kidneys and lungs of mice during aging. SMP30 is a pleiotropic protein that acts to protect cells from apoptosis by enhancing plasma membrane Ca(2+) -pump activity and is bona fide gluconolactonase (EC 3.1.1.17) that participates in the penultimate step of the vitamin C biosynthetic pathway. For the past several years, we have obtained strong evidence showing the close relationship between SMP30, glucose metabolism disorder and non-alchoholic fatty liver disease in experiments with SMP30 knockout mice. Emerging proof links the following abnormalities: (i) the reduction of SMP30 by aging and/or excessive dietary fat or genetic deficiency causes a loss of Ca(2+) pumping activity, which impairs acute insulin release in pancreatic β-cells, initiates inflammatory responses with oxidative stress and endoplasmic reticulum stress in non-alchoholic steatohepatitis, exacerbates renal tubule damage, and introduces tubulointerstitial inflammation and fibrosis in diabetic nephropathy; (ii) vitamin C insufficiency also impairs acute insulin secretion in pancreatic β-cells by a mechanism distinct from that of the SMP30 deficiency; and (iii) the increased oxidative stress by concomitant deficiencies of SMP30, superoxide dismutase 1 and vitamin C similarly causes hepatic steatosis. Here, we review recent advances in our understanding of SMP30 in glucose metabolism disorder and non-alchoholic fatty liver disease.
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Affiliation(s)
- Yoshitaka Kondo
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Akihito Ishigami
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
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Wu Y, Zhang M, Liu R, Zhao C. Oxidative Stress-Activated NHE1 Is Involved in High Glucose-Induced Apoptosis in Renal Tubular Epithelial Cells. Yonsei Med J 2016; 57:1252-9. [PMID: 27401659 PMCID: PMC4960394 DOI: 10.3349/ymj.2016.57.5.1252] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 01/14/2016] [Accepted: 02/17/2016] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Diabetic nephropathy (DN) is a prevalent chronic microvascular complication of diabetes mellitus involving disturbances in electrolytes and the acid-base balance caused by a disorder of glucose metabolism. NHE1 is a Na⁺/H⁺ exchanger responsible for keeping intracellular pH (pHi) balance and cell growth. Our study aimed to investigate roles of NHE1 in high glucose (HG)-induced apoptosis in renal tubular epithelial cells. MATERIALS AND METHODS Renal epithelial tubular cell line HK-2 was cultured in medium containing 5 mM or 30 mM glucose. Then, cell apoptosis, oxidative stress, NHE1 expression, and pHi were evaluated. NHE1 siRNA and inhibitor were used to evaluate its role in cell apoptosis. RESULTS HG significantly increased cell apoptosis and the production of reactive oxygen species (ROS) and 8-OHdG (p<0.05). Meanwhile, we found that HG induced the expression of NHE1 and increased the pHi from 7.0 to 7.6 after 48 h of incubation. However, inhibiting NHE1 using its specific siRNA or antagonist DMA markedly reduced cell apoptosis stimulated by HG. In addition, suppressing cellular oxidative stress using antioxidants, such as glutathione and N-acetyl cysteine, significantly reduced the production of ROS, accompanied by a decrease in NHE1. We also found that activated cyclic GMP-Dependent Protein Kinase Type I (PKG) signaling promoted the production of ROS, which contributed to the regulation of NHE1 functions. CONCLUSION Our study indicated that HG activates PKG signaling and elevates the production of ROS, which was responsible for the induction of NHE1 expression and dysfunction, as well as subsequent cell apoptosis, in renal tubular epithelial cells.
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Affiliation(s)
- Yiqing Wu
- Department of Nephrology, Tianjin Union Medicine Center, Tianjin, China
| | - Min Zhang
- Department of Nephrology, Tianjin Union Medicine Center, Tianjin, China
| | - Rui Liu
- Department of Rehabilitation, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Chunjie Zhao
- Department of Cardiology, Tianjin Union Medicine Center, Tianjin, China.
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Wang Y, He D, Ni C, Zhou H, Wu S, Xue Z, Zhou Z. Vitamin D induces autophagy of pancreatic β-cells and enhances insulin secretion. Mol Med Rep 2016; 14:2644-50. [PMID: 27430408 DOI: 10.3892/mmr.2016.5531] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 06/21/2016] [Indexed: 11/06/2022] Open
Abstract
Epidemiological evidence indicates that vitamin D is involved in defense against diabetes; however, the precise underlying mechanism remains to be elucidated. In the present study, the effect of vitamin D on the pathogenesis of diabetes was investigated, with an emphasis on its direct effect on pancreatic β‑cells. A streptozotocin (STZ)‑induced type 1 diabetes mellitus (T1DM) mouse model and MIN6 mouse insulinoma β‑cells were subjected to vitamin D treatment. Histopathological analysis of pancreatic islets was performed to investigate insulitis, and reverse transcription-quantitative polymerase chain reaction and western blotting were used to determine the mRNA and protein expression levels of markers of autophagy [microtubule-associated protein 1A/1B‑light chain 3 (LC3) and Beclin 1] and regulation of apoptosis [B-cell lymphoma 2 (Bcl-2)]. Apoptosis of MIN6 cells was examined by flow cytometry following annexin V/propidium iodide labeling. The secretion of insulin was measured by ELISA. The results revealed that vitamin D reduced the incidence of T1DM, enhanced insulin secretion and relieved pancreatic inflammation in STZ‑treated mice. Furthermore, vitamin D increased the mRNA expression levels of LC3 and Beclin 1, and increased Bcl‑2 protein expression levels in STZ‑treated MIN6 cells, while decreasing the apoptosis rate. The results of the present study demonstrated, for the first time to the best of our knowledge, that vitamin D induces autophagy and suppresses apoptosis of pancreatic β‑cells, as well as preventing insulitis. These findings regarding vitamin D provide insights into its involvement in diabetes, and suggest a potential novel strategy for the treatment of diabetes via agents enhancing autophagy in pancreatic β-cells.
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Affiliation(s)
- Yubin Wang
- Laboratory Animal Center, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Dawei He
- Laboratory Animal Center, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Chengpei Ni
- Laboratory Animal Center, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Huiying Zhou
- Laboratory Animal Center, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Shuyan Wu
- Laboratory Animal Center, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Zhimou Xue
- Laboratory Animal Center, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Zhengyu Zhou
- Laboratory Animal Center, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
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Suppressed glycolytic metabolism in the prostate of transgenic rats overexpressing calcium-binding protein regucalcin underpins reduced cell proliferation. Transgenic Res 2015; 25:139-48. [PMID: 26553531 DOI: 10.1007/s11248-015-9918-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 11/01/2015] [Indexed: 01/02/2023]
Abstract
Regucalcin (RGN) is a calcium-binding protein underexpressed in human prostate cancer cases, and it has been associated with the suppression of cell proliferation and the regulation of several metabolic pathways. On the other hand, it is known that the metabolic reprogramming with augmented glycolytic metabolism and enhanced proliferative capability is a characteristic of prostate cancer cells. The present study investigated the influence of RGN on the glycolytic metabolism of rat prostate by comparing transgenic adult animals overexpressing RGN (Tg-RGN) with their wild-type counterparts. Glucose consumption was significantly decreased in the prostate of Tg-RGN animals relatively to wild-type, and accompanied by the diminished expression of glucose transporter 3 and glycolytic enzyme phosphofructokinase. Also, prostates of Tg-RGN animals displayed lower lactate levels, which resulted from the diminished expression/activity of lactate dehydrogenase. The expression of the monocarboxylate transporter 4 responsible for the export of lactate to the extracellular space was also diminished with RGN overexpression. These results showed the effect of RGN in inhibiting the glycolytic metabolism in rat prostate, which was underpinned by a reduced cell proliferation index. The present findings also suggest that the loss of RGN may predispose to a hyper glycolytic profile and fostered proliferation of prostate cells.
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