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Liu J, Zhou W, Yang L, Li Y, Qiu J, Fu X, Ren P, Guo F, Zhou Y, Liu J, Chen P, DiSanto ME, Zhang X. STEAP4 modulates cell proliferation and oxidative stress in benign prostatic hyperplasia. Cell Signal 2024; 113:110933. [PMID: 37866665 DOI: 10.1016/j.cellsig.2023.110933] [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: 06/18/2023] [Revised: 09/08/2023] [Accepted: 10/18/2023] [Indexed: 10/24/2023]
Abstract
Benign prostatic hyperplasia (BPH) is a quite common chronic disease plagued elderly men and its etiology remains unclear. It was reported that the six-transmembrane epithelial antigen of prostate 4 (STEAP4) could modulate cell proliferation/apoptosis ratio and oxidative stress in cancers. Our current study aimed to explore the expression, biological function, and underlying mechanism of STEAP4 in BPH progress. Human prostate tissues and cell lines were utilized. qRT-PCR and immunofluorescence staining were employed. STEAP4 knockdown (STEAP4-KD) or STEAP4 overexpression (STEAP4-OE) cell models were established. Cell proliferation, cell cycle, apoptosis, and reactive oxygen species (ROS) were determined by cell counting kit-8 (CCK-8) assay and flow cytometry. Apoptosis-related proteins and antioxidant enzymes were identified by Western Blot. In addition, the epithelial-mesenchymal transition (EMT) process and fibrosis biomarker (collagen I and α-SMA) were analyzed. It was indicated that STEAP4 was mainly located in the prostate epithelium and upregulated in BPH tissues. STEAP4 deficiency induced apoptosis and inhibited cell survival, but had no effect on the cell cycle, fibrosis, and EMT process. In addition, ROS changes were observed in the STEAP4-KD model. Consistently, overproduction of STEAP4 suppressed apoptosis and promoted cell proliferation, as well as facilitated ROS production. We further examined AKT / mTOR, p38MAPK / p-p38MAPK, and WNT/ β-Catenin signaling pathway and demonstrated that STEAP4 regulated the proliferation and apoptosis of prostate cells through AKT / mTOR signaling, rather than p38MAPK / p-p38MAPK and WNT/ β-Catenin pathways. Furthermore, activating AKT / mTOR signaling with SC79 significantly reversed apoptosis triggered by STEAP4 deficiency, whereas suppressing AKT / mTOR signaling with MK2206 reduced the increase of cell viability triggered by STEAP4 overproduction. Our original data demonstrated that STEAP4 is crucial in the onset and progression of prostate hyperplasia and may become a new target for the treatment of BPH.
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Affiliation(s)
- Jiang Liu
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wei Zhou
- Zhongnan Hospital of Wuhan University, Institute of Hepatobiliary Diseases of Wuhan University, Transplant Center of Wuhan University, Hubei Key Laboratory of Medical Technology on Transplantation, Wuhan, China
| | - Liang Yang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yan Li
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jizhang Qiu
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xun Fu
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Pengfei Ren
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Feng Guo
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yongying Zhou
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jianmin Liu
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Ping Chen
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Michael E DiSanto
- Department of Surgery and Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ, USA
| | - Xinhua Zhang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China.
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Feng R, Wang D, Li T, Liu X, Peng T, Liu M, Ren G, Xu H, Luo H, Lu D, Qi B, Zhang M, Li Y. Elevated SLC40A1 impairs cardiac function and exacerbates mitochondrial dysfunction, oxidative stress, and apoptosis in ischemic myocardia. Int J Biol Sci 2024; 20:414-432. [PMID: 38169607 PMCID: PMC10758104 DOI: 10.7150/ijbs.89368] [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: 08/22/2023] [Accepted: 10/28/2023] [Indexed: 01/05/2024] Open
Abstract
Iron homeostasis is crucial for optimal cardiac function. Iron deficiency and overload have been linked to the development of cardiomyopathy and heart failure (HF) via intricate mechanisms. Although the crucial role of SLC40A1 in iron metabolism by facilitating the efflux of cellular iron has been confirmed, its specific molecular functions in cardiovascular diseases remain poorly understood. In this study, we generated mice with inducible cardiomyocyte-specific overexpression of SLC40A1 for the first time. The overexpression of SLC40A1 in the cardiomyocytes of adult mice resulted in significant iron deficiency, leading to mitochondrial dysfunction, oxidative stress, and apoptosis, subsequently resulting in the development of fatal HF. Notably, SLC40A1 upregulation was observed in the ischemic region during the initial phase of myocardial infarction (MI), contributing to iron loss in the cardiomyocytes. Conversely, the cardiomyocyte-specific knockdown of SLC40A1 improved cardiac dysfunction after MI by enhancing mitochondrial function, suppressing oxidative stress, and reducing cardiomyocytes apoptosis. Mechanistically, Steap4 interacted with SLC40A1, facilitating SLC40A1-mediated iron efflux from cardiomyocytes. In short, our study presents evidence for the involvement of SLC40A1 in the regulation of myocardial iron levels and the therapeutic benefits of cardiomyocyte-specific knockdown of SLC40A1 in MI in mice.
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Affiliation(s)
- Renqian Feng
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Di Wang
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Tiantian Li
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Xulin Liu
- Department of Orthodontics, Stomatology Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Tingwei Peng
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Mingchuan Liu
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Gaotong Ren
- Department of Cardiology, NO. 988 Hospital of Joint Logistic Sopport Force, Zhengzhou, 450007, China
| | - Haowei Xu
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Haixia Luo
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Denghui Lu
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Bingchao Qi
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Mingming Zhang
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Yan Li
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710032, China
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Ju MH, Jang EJ, Kang SH, Roh YH, Jeong JS, Han SH. Six-Transmembrane Epithelial Antigen of Prostate 4: An Indicator of Prognosis and Tumor Immunity in Hepatocellular Carcinoma. J Hepatocell Carcinoma 2023; 10:643-658. [PMID: 37101765 PMCID: PMC10124562 DOI: 10.2147/jhc.s394973] [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: 11/04/2022] [Accepted: 03/14/2023] [Indexed: 04/28/2023] Open
Abstract
Purpose The six-transmembrane epithelial antigen of prostate 4 (STEAP4) has been linked to tumor progression via its involvement in inflammatory responses, oxidative stress, and metabolism. However, STEAP4 has rarely been studied in hepatocellular carcinoma (HCC). We explored STEAP4 expression associated with tumor prognosis to understand its role in tumor biology in HCC. Patients and Methods STEAP4 mRNA and protein expressions were primarily analyzed using bioinformatics tools based on The Cancer Genome Atlas database to understand the expression pattern, molecular mechanism, prognostic impact, and association with immune cell infiltration. We further investigated the association between STEAP4 protein expression and clinicopathological parameters and their predictive value in HCC patients using immunohistochemical staining of tissue microarrays. Results The expression of STEAP4 mRNA and protein in HCC tissues was significantly lower than in normal liver tissues. Reduced expression of STEAP4 was linked to advanced HCC stages, poor recurrence-free survival (RFS), and overall survival. Furthermore, reduced STEAP4 expression was a significant predictor of worse RFS in univariate and multivariate analyses in the immunohistochemical cohort. GO, KEGG, and GSEA analyses revealed that STEAP4 is related to numerous biological processes and pathways, including drug metabolism, DNA replication, RNA metabolism, and immune response. In terms of the immune system, the decreased level of STEAP4 was correlated with the immunosuppressive microenvironment. Conclusion Our data indicated that reduced STEAP4 expression was significantly associated with tumor aggressiveness and poor prognosis, possibly because of its link to various biological processes and induction of HCC immune evasion. Therefore, STEAP4 expression may serve as a potential prognostic biomarker for cancer progression and immunity, as well as a therapeutic target in HCC.
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Affiliation(s)
- Mi Ha Ju
- Department of Pathology, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Eun Jeong Jang
- Department of Surgery, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Sung Hwa Kang
- Department of Surgery, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Young Hoon Roh
- Department of Surgery, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Jin Sook Jeong
- Department of Pathology, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Song-Hee Han
- Department of Pathology, Dong-A University College of Medicine, Busan, Republic of Korea
- Correspondence: Song-Hee Han, Department of Pathology, Dong-A University College of Medicine, 26, Daesingongwon-ro, Seo-gu, Busan, 49201, Republic of Korea, Tel +82-51-240-2863, Fax +82-51-240-7396, Email
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Sikkeland J, Ng MYW, Nenseth HZ, Unal B, Qu S, Jin Y, Simonsen A, Saatcioglu F. STAMP2 suppresses autophagy in prostate cancer cells by modulating the integrated stress response pathway. Am J Cancer Res 2022; 12:327-336. [PMID: 35141021 PMCID: PMC8822275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 08/19/2021] [Indexed: 06/14/2023] Open
Abstract
Six Transmembrane Protein of Prostate 2 (STAMP2) is critical for prostate cancer (PCa) growth. We previously showed that STAMP2 regulates the expression of stress induced transcription factor ATF4, which is implicated in starvation-induced autophagy. We therefore investigated whether STAMP2 is involved in the regulation of autophagy in PCa cells. Here we show that STAMP2 suppresses autophagy in PCa cells through modulation of the integrated stress response axis. We also find that STAMP2 regulates mitochondrial respiration. These findings suggest that STAMP2 has significant metabolic effects through mitochondrial function and autophagy, both of which support PCa growth.
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Affiliation(s)
- Jørgen Sikkeland
- Department of Biosciences, University of OsloPostboks 1066 Blindern, Oslo 0316, Norway
| | - Matthew Yoke Wui Ng
- Department of Biosciences, University of OsloPostboks 1066 Blindern, Oslo 0316, Norway
- Department of Molecular Medicine, Institute of Basic Medical Sciences and Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of OsloOslo 0313, Norway
| | - Hatice Zeynep Nenseth
- Department of Biosciences, University of OsloPostboks 1066 Blindern, Oslo 0316, Norway
- Institute for Cancer Genetics and Informatics, Oslo University HospitalOslo 0310, Norway
| | - Bilal Unal
- Institute for Cancer Genetics and Informatics, Oslo University HospitalOslo 0310, Norway
| | - Su Qu
- Department of Biosciences, University of OsloPostboks 1066 Blindern, Oslo 0316, Norway
| | - Yang Jin
- Department of Biosciences, University of OsloPostboks 1066 Blindern, Oslo 0316, Norway
- Institute for Cancer Genetics and Informatics, Oslo University HospitalOslo 0310, Norway
| | - Anne Simonsen
- Department of Molecular Medicine, Institute of Basic Medical Sciences and Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of OsloOslo 0313, Norway
- Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University HospitalMontebello, Oslo 0379, Norway
| | - Fahri Saatcioglu
- Department of Biosciences, University of OsloPostboks 1066 Blindern, Oslo 0316, Norway
- Institute for Cancer Genetics and Informatics, Oslo University HospitalOslo 0310, Norway
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ATP7A-Regulated Enzyme Metalation and Trafficking in the Menkes Disease Puzzle. Biomedicines 2021; 9:biomedicines9040391. [PMID: 33917579 PMCID: PMC8067471 DOI: 10.3390/biomedicines9040391] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 12/12/2022] Open
Abstract
Copper is vital for numerous cellular functions affecting all tissues and organ systems in the body. The copper pump, ATP7A is critical for whole-body, cellular, and subcellular copper homeostasis, and dysfunction due to genetic defects results in Menkes disease. ATP7A dysfunction leads to copper deficiency in nervous tissue, liver, and blood but accumulation in other tissues. Site-specific cellular deficiencies of copper lead to loss of function of copper-dependent enzymes in all tissues, and the range of Menkes disease pathologies observed can now be explained in full by lack of specific copper enzymes. New pathways involving copper activated lysosomal and steroid sulfatases link patient symptoms usually related to other inborn errors of metabolism to Menkes disease. Additionally, new roles for lysyl oxidase in activation of molecules necessary for the innate immune system, and novel adapter molecules that play roles in ERGIC trafficking of brain receptors and other proteins, are emerging. We here summarize the current knowledge of the roles of copper enzyme function in Menkes disease, with a focus on ATP7A-mediated enzyme metalation in the secretory pathway. By establishing mechanistic relationships between copper-dependent cellular processes and Menkes disease symptoms in patients will not only increase understanding of copper biology but will also allow for the identification of an expanding range of copper-dependent enzymes and pathways. This will raise awareness of rare patient symptoms, and thus aid in early diagnosis of Menkes disease patients.
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Maseroli E, Comeglio P, Corno C, Cellai I, Filippi S, Mello T, Galli A, Rapizzi E, Presenti L, Truglia MC, Lotti F, Facchiano E, Beltrame B, Lucchese M, Saad F, Rastrelli G, Maggi M, Vignozzi L. Testosterone treatment is associated with reduced adipose tissue dysfunction and nonalcoholic fatty liver disease in obese hypogonadal men. J Endocrinol Invest 2021; 44:819-842. [PMID: 32772323 PMCID: PMC7946690 DOI: 10.1007/s40618-020-01381-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 07/31/2020] [Indexed: 12/11/2022]
Abstract
PURPOSE In both preclinical and clinical settings, testosterone treatment (TTh) of hypogonadism has shown beneficial effects on insulin sensitivity and visceral and liver fat accumulation. This prospective, observational study was aimed at assessing the change in markers of fat and liver functioning in obese men scheduled for bariatric surgery. METHODS Hypogonadal patients with consistent symptoms (n = 15) undergoing 27.63 ± 3.64 weeks of TTh were compared to untreated eugonadal (n = 17) or asymptomatic hypogonadal (n = 46) men. A cross-sectional analysis among the different groups was also performed, especially for data derived from liver and fat biopsies. Preadipocytes isolated from adipose tissue biopsies were used to evaluate insulin sensitivity, adipogenic potential and mitochondrial function. NAFLD was evaluated by triglyceride assay and by calculating NAFLD activity score in liver biopsies. RESULTS In TTh-hypogonadal men, histopathological NAFLD activity and steatosis scores, as well as liver triglyceride content were lower than in untreated-hypogonadal men and comparable to eugonadal ones. TTh was also associated with a favorable hepatic expression of lipid handling-related genes. In visceral adipose tissue and preadipocytes, TTh was associated with an increased expression of lipid catabolism and mitochondrial bio-functionality markers. Preadipocytes from TTh men also exhibited a healthier morpho-functional phenotype of mitochondria and higher insulin-sensitivity compared to untreated-hypogonadal ones. CONCLUSIONS The present data suggest that TTh in severely obese, hypogonadal individuals induces metabolically healthier preadipocytes, improving insulin sensitivity, mitochondrial functioning and lipid handling. A potentially protective role for testosterone on the progression of NAFLD, improving hepatic steatosis and reducing intrahepatic triglyceride content, was also envisaged. CLINICAL TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT02248467, September 25th 2014.
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Affiliation(s)
- E Maseroli
- Andrology, Women's Endocrinology and Gender Incongruence Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - P Comeglio
- Andrology, Women's Endocrinology and Gender Incongruence Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - C Corno
- Andrology, Women's Endocrinology and Gender Incongruence Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - I Cellai
- Andrology, Women's Endocrinology and Gender Incongruence Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - S Filippi
- Interdepartmental Laboratory of Functional and Cellular Pharmacology of Reproduction, University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - T Mello
- Gastroenterology Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - A Galli
- Gastroenterology Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - E Rapizzi
- Endocrinology Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - L Presenti
- General, Bariatric and Metabolic Surgery Unit, Santa Maria Nuova Hospital, , Piazza Santa Maria Nuova, 1, 50122, Florence, Italy
| | - M C Truglia
- General, Bariatric and Metabolic Surgery Unit, Santa Maria Nuova Hospital, , Piazza Santa Maria Nuova, 1, 50122, Florence, Italy
| | - F Lotti
- Andrology, Women's Endocrinology and Gender Incongruence Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - E Facchiano
- General, Bariatric and Metabolic Surgery Unit, Santa Maria Nuova Hospital, , Piazza Santa Maria Nuova, 1, 50122, Florence, Italy
| | - B Beltrame
- General, Bariatric and Metabolic Surgery Unit, Santa Maria Nuova Hospital, , Piazza Santa Maria Nuova, 1, 50122, Florence, Italy
| | - M Lucchese
- General, Bariatric and Metabolic Surgery Unit, Santa Maria Nuova Hospital, , Piazza Santa Maria Nuova, 1, 50122, Florence, Italy
| | - F Saad
- Medical Affairs, Bayer AG, Kaiser-Wilhelm-Allee 1, 51373, Leverkusen, Germany
| | - G Rastrelli
- Andrology, Women's Endocrinology and Gender Incongruence Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
| | - M Maggi
- Endocrinology Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy
- I.N.B.B. (Istituto Nazionale Biostrutture E Biosistemi), Viale delle Medaglie d'Oro 305, 00136, Rome, Italy
| | - L Vignozzi
- Andrology, Women's Endocrinology and Gender Incongruence Unit, Department of Experimental Clinical and Biomedical Sciences "Mario Serio", University of Florence, Viale Pieraccini 6, 50134, Florence, Italy.
- I.N.B.B. (Istituto Nazionale Biostrutture E Biosistemi), Viale delle Medaglie d'Oro 305, 00136, Rome, Italy.
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Wang Y, Gao L, Li Z, Ma X. MicroRNA-301a-3p promotes diabetic retinopathy via regulation of six-transmembrane epithelial antigen of prostate 4. Inflamm Res 2021; 70:445-457. [PMID: 33609142 DOI: 10.1007/s00011-020-01431-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 10/22/2022] Open
Abstract
OBJECTIVE AND DESIGN Diabetic retinopathy (DR) is one of the most serious microvascular complications of diabetes mellitus (DM). MicroRNAs (miRNAs) have been discovered to play a crucial role in DR, but the mechanisms underlying the effects of miR-301a-3p on DR are poorly understood. This paper was designed to explore the possible role of miR-301a-3p in DR. METHODS The diabetic rat model was established by a single intraperitoneal injection of streptozotocin (STZ). The effects of miR-301a-3p on the biological functions of HRECs were determined through a series of experiments in vitro/vivo. RESULTS The results revealed that interference with miR-301a-3p could decrease the expressions of inflammatory factors and apoptosis in the retinal tissue of DR. Furthermore, it can alleviate the oxidative stress in DR serum, reduce VEGF expression, increase endothelial cell marker expression, and inhibit (High Glucose) HG-induced apoptosis of HRECs. Six-transmembrane epithelial antigen of prostate 4 (STEAP4) was the target of miR-301a-3p. All the effects of miR-301a-3p in DR model were reversed by STEAP4 inhibitor. CONCLUSION miR-301a-3p promotes diabetic retinopathy via regulation of STEAP4. The findings in this study may provide a vital reference for the drug research and development in DR treatment.
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Affiliation(s)
- Yingmin Wang
- Department of Nursing, Xingtai Medical College, Hebei, 054000, China
| | - Lijuan Gao
- Department of Clinical, Xingtai Medical College, Hebei, 054000, China
| | - Zhili Li
- Department of Physiology, Hebei University of Chinese Medicine, Xingyuan Road No. 3, Hebei, 050200, China.
| | - Xingyou Ma
- Department of Clinical Medicine, Second Affiliated Hospital of Xingtai Medical College, Hebei, 054000, China
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Guo F, Yuan Y. Tumor Necrosis Factor Alpha-Induced Proteins in Malignant Tumors: Progress and Prospects. Onco Targets Ther 2020; 13:3303-3318. [PMID: 32368089 PMCID: PMC7182456 DOI: 10.2147/ott.s241344] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/04/2020] [Indexed: 12/14/2022] Open
Abstract
Tumor necrosis factor (TNF) is the first cytokine used in tumor biotherapy, but TNF-related drugs are limited by the lack of specific targets. Tumor necrosis factor alpha-induced proteins (TNFAIPs), derived from TNF, is a protein family and participates in proliferation, invasion and metastasis of tumor cells. In order to better understand biological functions and potential roles of TNFAIPs in malignant tumors, this paper in the form of “Gene–Protein–Tumor correlation” summarizes the biological characteristics, physiological functions and mechanisms of TNFAIPs by searching National Center of Biotechnology Information, GeneCards, UniProt and STRING databases. The relationship between TNFAIPs and malignant tumors is analyzed, and protein–protein interaction diagram in members of TNFAIPs is drawn based on TNF for the first time. We find that TNF as a key factor is related to TNFAIP1, TNFAIP3, TNFAIP5, TNFAIP6, TNFAIP8 and TNFAIP9, which can be directly involved in activating TNFAIP1, TNFAIP5, TNFAIP8 and TNFAIP9. We confirm that the mechanism of TNFAIP1, TNFAIP2 and TNFAIP3 inducing tumors may be related to NF-κB signaling pathway, but the mechanism of tumor induction by other members of TNFAIPs is not clear. In the future, translational studies are needed to explore the mechanisms of TNF-TNFAIPs-tumors.
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Affiliation(s)
- Fang Guo
- Liaoning Provincial Education Department, Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Shenyang City, Liaoning Province, People's Republic of China.,Department of Oncology, PLA Cancer Center, General Hospital of Northern Theater Command, Shenyang City, Liaoning Province, People's Republic of China
| | - Yuan Yuan
- Liaoning Provincial Education Department, Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Shenyang City, Liaoning Province, People's Republic of China
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Treatment with metformin prevents myocardial ischemia-reperfusion injury via STEAP4 signaling pathway. Anatol J Cardiol 2019; 21:261-271. [PMID: 31062756 PMCID: PMC6528516 DOI: 10.14744/anatoljcardiol.2019.11456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objective: The aim of the present study was to investigate the underlying mechanism of metformin in reducing myocardial apoptosis and improving mitochondrial function in rats and H9c2 cells subjected to myocardial ischemia–reperfusion (I/R) or hypoxia–reoxygenation (H/R) injuries, respectively. Methods: Following pretreatment with metformin, male Sprague–Dawley rats were used to establish an I/R model in vivo. Serum creatinine kinase-MB and cardiac troponin T levels were examined by enzyme-linked immunosorbent assay. Infarct size and apoptosis were measured by triphenyl tetrazolium chloride staining and terminal deoxynucleotidyl transferase dUTP nick end labeling assay. Pathological changes were evaluated by hematoxylin and eosin staining. H9c2 cells were used to establish an H/R model in vitro. Cell apoptosis and mitochondrial membrane potential (MMP) were examined by flow cytometry and Rhodamine 123. The expression levels of six-transmembrane epithelial antigen of prostate 4 (STEAP4), B-cell lymphoma 2, Bcl-2-associated X protein, and glyceraldehyde 3-phosphate dehydrogenase in both myocardial tissues and H9c2 cells were determined by western blotting. Results: We found that metformin decreased infarct size, increased STEAP4 expression, mitigated myocardial apoptosis, and increased MMP when the models were subjected to H/R or I/R injuries. However, STEAP4 knockdown significantly abrogated the beneficial effect of metformin. Conclusion: We further demonstrated the protective effect of metformin on cardiomyocytes, which might be at least partly attributable to the upregulation of STEAP4. Therefore, STEAP4 might be a new target to decrease apoptosis and rescue mitochondrial function in myocardial I/R injury.
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Oh YJ, Kim HY, Lee MH, Suh SH, Choi Y, Nam TG, Kwon WY, Lee SY, Yoo YH. Cilostazol Improves HFD-Induced Hepatic Steatosis by Upregulating Hepatic STAMP2 Expression through AMPK. Mol Pharmacol 2018; 94:1401-1411. [PMID: 30366981 DOI: 10.1124/mol.118.113217] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/05/2018] [Indexed: 12/29/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is an increasingly studied condition that can progress to end-stage liver disease. Although NAFLD was first described in 1980, a complete understanding of the mechanism and causes of this disease is still lacking. Six-transmembrane protein of prostate 2 (STAMP2) plays a role in integrating inflammatory and nutritional signals with metabolism. Our previous study suggested that STAMP2 may be a suitable target for treating NAFLD. In the current study, we performed a focused drug-screening and found that cilostazol could be a potential STAMP2 enhancer. Thus, we examined whether cilostazol alleviates NAFLD through STAMP2. The in vivo and in vitro pharmacological efficacies of cilostazol on STAMP2 expression and lipid accumulation were analyzed in NAFLD mice induced by high-fat diet (HFD) and in HepG2 cell lines treated by oleic acid (OA), respectively. Cilostazol increased the expression of STAMP2 through transcriptional regulation in vivo and in vitro. Cilostazol also dampened the STAMP2 downregulation caused by the HFD and by OA in vivo and in vitro, respectively. Cilostazol activated AMP-activated protein kinase (AMPK) in vivo and in vitro, and AMPK functions upstream of STAMP2, and reversed downregulation of STAMP2 expression through AMPK in the NAFLD model. Cilostazol ameliorates hepatic steatosis by enhancing hepatic STAMP2 expression through AMPK. Enhancing STAMP2 expression with cilostazol represents a potential therapeutic avenue for treatment of NAFLD.
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Affiliation(s)
- Yoo Jin Oh
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Hye Young Kim
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Mi Hwa Lee
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Sung Hwan Suh
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Yongmun Choi
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Tae-Gyu Nam
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Woo Young Kwon
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Sang Yeob Lee
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
| | - Young Hyun Yoo
- Departments of Anatomy and Cell Biology (Y.J.O., H.Y.K., M.H.L., W.Y.K., Y.H.Y.), Endocrinology Medicine (S.H.S.), and Rheumatology (S.Y.L.), Dong-A University College of Medicine, Busan, Republic of Korea; Gyeonggi Bio Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea (Y.C.); and Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea (T.-G.N.)
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11
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Lee SW, Park JB, Kim HJ, Kim HY, Lee SY, Chung WT, Shin YK, Park HT, Rho JH, Yoo YH. Palmitate induces lipoapoptosis in Schwann cells through ROS generation-mediated STAMP2 downregulation. Biochem Biophys Res Commun 2018; 503:1260-1266. [PMID: 30005874 DOI: 10.1016/j.bbrc.2018.07.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 07/07/2018] [Indexed: 02/06/2023]
Abstract
Free fatty acids (FFAs) are considered the principal inducers of lipotoxicity, leading to cell dysfunction and/or cell death. Lipotoxicity in Schwann cells (SCs) damages neurons, which may be associated with peripheral neuropathies and axon degeneration. However, the molecular mechanism by which FFAs exert lipotoxicity in SCs remains to be established. In the present study, we demonstrate that palmitate exerts lipotoxicity in SCs through apoptosis and that palmitate-induced lipotoxicity in SCs is mediated through reactive oxygen species (ROS) generation. We observed that the six-transmembrane protein of prostate 2 (STAMP2), which plays a pivotal role in lipid homeostasis, is expressed in SCs. We further demonstrate that palmitate induces lipoapoptosis in SCs through ROS generation-mediated STAMP2 downregulation and that STAMP2 depletion accelerates the palmitate-exerted lipoapoptosis in SCs, indicating that STAMP2 confers on SCs the ability to resist palmitate-induced lipotoxicity. In conclusion, palmitate induces lipoapoptosis in SCs through ROS generation-mediated STAMP2 downregulation. Our findings indicate that ROS and STAMP2 may represent suitable targets for pharmacological interventions targeting lipotoxicity-associated peripheral neuropathies and axon degeneration.
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Affiliation(s)
- Sung Won Lee
- Department of Rhematology, Dong-A University College of Medicine, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Joon Beom Park
- Department of Anatomy and Cell Biology, Dong-A University College of Medicine and Mitochondria Hub Regulation Center, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Hwa Jin Kim
- Department of Anatomy and Cell Biology, Dong-A University College of Medicine and Mitochondria Hub Regulation Center, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Hye Young Kim
- Department of Anatomy and Cell Biology, Dong-A University College of Medicine and Mitochondria Hub Regulation Center, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Sang Yeob Lee
- Department of Rhematology, Dong-A University College of Medicine, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Won Tae Chung
- Department of Rhematology, Dong-A University College of Medicine, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Yoon Kyung Shin
- Department of Physiology, Dong-A University College of Medicine and Peripheral Neurophagy Research Center, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Hwan Tae Park
- Department of Physiology, Dong-A University College of Medicine and Peripheral Neurophagy Research Center, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Jee Hyun Rho
- Department of Anatomy and Cell Biology, Dong-A University College of Medicine and Mitochondria Hub Regulation Center, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea
| | - Young Hyun Yoo
- Department of Anatomy and Cell Biology, Dong-A University College of Medicine and Mitochondria Hub Regulation Center, 3-1 Dongdaesin-Dong, Seo-Gu, Busan, Republic of Korea.
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12
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Dietary fat-associated osteoarthritic chondrocytes gain resistance to lipotoxicity through PKCK2/STAMP2/FSP27. Bone Res 2018; 6:20. [PMID: 30002945 PMCID: PMC6033867 DOI: 10.1038/s41413-018-0020-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 04/13/2018] [Accepted: 04/16/2018] [Indexed: 12/18/2022] Open
Abstract
Free fatty acids (FFAs), which are elevated with metabolic syndrome, are considered the principal offender exerting lipotoxicity. Few previous studies have reported a causal relationship between FFAs and osteoarthritis pathogenesis. However, the molecular mechanism by which FFAs exert lipotoxicity and induce osteoarthritis remains largely unknown. We here observed that oleate at the usual clinical range does not exert lipotoxicity while oleate at high pathological ranges exerted lipotoxicity through apoptosis in articular chondrocytes. By investigating the differential effect of oleate at toxic and nontoxic concentrations, we revealed that lipid droplet (LD) accumulation confers articular chondrocytes, the resistance to lipotoxicity. Using high fat diet-induced osteoarthritis models and articular chondrocytes treated with oleate alone or oleate plus palmitate, we demonstrated that articular chondrocytes gain resistance to lipotoxicity through protein kinase casein kinase 2 (PKCK2)—six-transmembrane protein of prostate 2 (STAMP2)—and fat-specific protein 27 (FSP27)-mediated LD accumulation. We further observed that the exertion of FFAs-induced lipotoxicity was correlated with the increased concentration of cellular FFAs freed from LDs, whether FFAs are saturated or not. In conclusion, PKCK2/STAMP2/FSP27-mediated sequestration of FFAs in LD rescues osteoarthritic chondrocytes. PKCK2/STAMP2/FSP27 should be considered for interventions against metabolic OA. Cartilage tissue deals with the stress of exposure to free fatty acids by sequestering the toxic molecules into sub-cellular oil droplets. Young Hyun Yoo from Dong-A University College of Medicine in Busan, South Korea, and coworkers exposed rat cartilage cells to increasing levels of a fatty acid called oleate, a by-product of fat metabolism, and observed that the accumulation of oil droplets conferred resistance to oleate-induced toxicity. In these rat cells and in experiments involving mouse models of osteoarthritis fed a high-fat diet, the researchers then identified three of the protective proteins needed for cartilage tissue to properly quarantine fatty acids into oil droplets. Those proteins — and their connected regulatory networks — could now serve as drug targets for treating metabolic syndrome-associated osteoarthritis.
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13
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Scarl RT, Lawrence CM, Gordon HM, Nunemaker CS. STEAP4: its emerging role in metabolism and homeostasis of cellular iron and copper. J Endocrinol 2017; 234:R123-R134. [PMID: 28576871 PMCID: PMC6166870 DOI: 10.1530/joe-16-0594] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 06/02/2017] [Indexed: 12/28/2022]
Abstract
Preserving energy homeostasis in the presence of stressors such as proinflammatory cytokines and nutrient overload is crucial to maintaining normal cellular function. Six transmembrane epithelial antigen of the prostate 4 (STEAP4), a metalloreductase involved in iron and copper homeostasis, is thought to play a potentially important role in the cellular response to inflammatory stress. Genome-wide association studies have linked various mutations in STEAP4 with the development of metabolic disorders such as obesity, metabolic syndrome and type 2 diabetes. Several studies have shown that expression of Steap4 is modulated by inflammatory cytokines, hormones and other indicators of cellular stress and that STEAP4 may protect cells from damage, helping to maintain normal metabolic function. STEAP4 appears to be particularly relevant in metabolically oriented cells, such as adipocytes, hepatocytes and pancreatic islet cells. These cells struggle to maintain their function in iron or copper overloaded states, presumably due to increased oxidative stress, suggesting STEAP4's role in metal homeostasis is critical to the maintenance of cellular homeostasis in general, and in preventing the onset of metabolic disease. In this review, we explore genetic associations of STEAP4 with metabolic disorders, and we examine STEAP4 tissue expression, subcellular localization, regulation, structure and function as it relates to metabolic diseases. We then examine how STEAP4's role as a regulator of cellular iron and copper may relate to type 2 diabetes.
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Affiliation(s)
- Rachel T Scarl
- Diabetes InstituteHeritage College of Osteopathic Medicine, Ohio University, Athens, Ohio, USA
- Department of Biomedical SciencesHeritage College of Osteopathic Medicine, Ohio University, Athens, Ohio, USA
| | - C Martin Lawrence
- Department of Chemistry and BiochemistryMontana State University, Bozeman, Montana, USA
| | - Hannah M Gordon
- Diabetes InstituteHeritage College of Osteopathic Medicine, Ohio University, Athens, Ohio, USA
- Department of Biomedical SciencesHeritage College of Osteopathic Medicine, Ohio University, Athens, Ohio, USA
| | - Craig S Nunemaker
- Diabetes InstituteHeritage College of Osteopathic Medicine, Ohio University, Athens, Ohio, USA
- Department of Biomedical SciencesHeritage College of Osteopathic Medicine, Ohio University, Athens, Ohio, USA
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14
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Ozmen F, Ozmen MM, Gelecek S, Bilgic İ, Moran M, Sahin TT. STEAP4 and HIF-1α gene expressions in visceral and subcutaneous adipose tissue of the morbidly obese patients. Mol Immunol 2016; 73:53-9. [PMID: 27058639 DOI: 10.1016/j.molimm.2016.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 03/14/2016] [Accepted: 03/18/2016] [Indexed: 02/05/2023]
Abstract
AIM AND BACKGROUND Obesity is a multifactorial disease in which environmental and genetic factors play an integrated role. Determining such target genes will help to elucidate the mechanisms underlying complex diseases such as obesity and diabetes which are usually seen together. Present study investigates the expression levels of STEAP4 and HIF-1α in visceral and subcutaneous adipose tissue. PATIENTS AND METHODS 30(6M) morbidly obese patients undergoing bariatric surgery were included in the study. The patients were grouped according to the BMI as Group I (BMI <50kg/m(2)) and Group II (BMI ≥50kg/m(2)). Samples from visceral (omentum) and subcutaneous adipose tissues were obtained from each patient and real-time PCR (qPCR) was carried out for STEAP4 and HIF-1α gene expressions. Correlations between expression levels and clinical parameters were analyzed. RESULTS Mean age of the patients recruited to the study was 37.4 (18-64) years. Mean BMI was 46 (36-60) kg/m(2). STEAP4 expression in visceral adipose tissue was significantly higher than subcutaneous tissue. Visceral STEAP4 expression was also found to be reduced with increased BMI. It was also lower in patients with HbA1C over 6. Furthermore, expression of subcutaneous and visceral HIF-1α was significantly higher in Group II. There was a significant correlation between BMI, glycosylated hemoglobin, STEAP4 and HIF-1α gene expression. CONCLUSIONS Obesity and related disease are linked with the fact that there is a low grade inflammation in the adipose tissue of the obese individuals. Counter-regulatory processes such as STEAP4 protein family are overwhelmed by the proinflammatory stimuli. HIF-1α expression is increased due to tissue hypoxia and pro-inflammatory stimuli in the obese individuals, which results in increased visceral STEAP4 expressions.
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Affiliation(s)
- Fusun Ozmen
- Department of Basic Oncology, Cancer Institute, Hacettepe University, Ankara, Turkey
| | - M Mahir Ozmen
- Department of Surgery, Ankara Numune Teaching and Research Hospital, Ankara, Turkey; Department of Surgery, Medical School, Hacettepe University, Turkey.
| | - Sibel Gelecek
- Department of Surgery, Ankara Numune Teaching and Research Hospital, Ankara, Turkey
| | - İsmail Bilgic
- Department of Surgery, Ankara Numune Teaching and Research Hospital, Ankara, Turkey
| | - Munevver Moran
- Department of Surgery, Ankara Numune Teaching and Research Hospital, Ankara, Turkey
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15
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Kim HY, Park SY, Lee MH, Rho JH, Oh YJ, Jung HU, Yoo SH, Jeong NY, Lee HJ, Suh S, Seo SY, Cheong J, Jeong JS, Yoo YH. Hepatic STAMP2 alleviates high fat diet-induced hepatic steatosis and insulin resistance. J Hepatol 2015; 63:477-85. [PMID: 25646886 DOI: 10.1016/j.jhep.2015.01.025] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 01/14/2015] [Accepted: 01/18/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND & AIMS Most studies on the role of STAMP2 in metabolism have used adipose tissue. Little knowledge exists concerning the role of STAMP2 in the liver, which is a metabolically central target. We hypothesized that STAMP2 is involved in non-alcoholic fatty liver disease (NAFLD) pathogenesis. METHODS We examined our hypothesis using human NAFLD patient pathology samples and a high-fat diet (HFD)-induced NAFLD mouse model. The molecular mechanism underlying hepatic STAMP2-mediated lipid imbalance was explored using an oleic acid (OA)-induced NAFLD in vitro model. RESULTS Noticeably, the expression level of STAMP2 protein was reduced in the livers obtained from NAFLD patients and HFD-induced NAFLD mice. In vivo knockdown of hepatic STAMP2 by siRNA accelerated hepatic steatosis and insulin resistance in mice fed a HFD. Conversely, the delivery of adenoviral STAMP2 (Ad-STAMP2) improved hepatic steatosis in HFD-induced NAFLD mice. The expression of lipogenic or adipogenic factors was increased in both in vitro and in vivo NAFLD models but was reversed by Ad-STAMP2. Adenoviral overexpression of STAMP2 improved insulin resistance in the HFD-induced NAFLD mice. In vivo and in vitro assays demonstrated that STAMP2 modulates insulin sensitivity and glucose metabolism and that STAMP2 counteracts OA-induced insulin resistance by modulating insulin receptor substrate-1 stability. CONCLUSIONS The present study revealed that hepatic STAMP2 plays a pivotal role in preventing HFD-induced NAFLD and that STAMP2 overexpression improves hepatic steatosis and insulin resistance in NAFLD. Our findings indicate that STAMP2 may represent a suitable target for interventions targeting NAFLD.
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Affiliation(s)
- Hye Y Kim
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - So Y Park
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - Mi H Lee
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - Jee H Rho
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - Yoo J Oh
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - Hye U Jung
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - Seung H Yoo
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - Na Y Jeong
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - Hye J Lee
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea
| | - SungHwan Suh
- Department of Endocrinology, Dong-A University College of Medicine, Busan 602-714, South Korea
| | - Su Y Seo
- Department of Microbiology, Dong-A University College of Medicine, Busan 602-714, South Korea
| | - JaeHun Cheong
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Busan 609-735, South Korea
| | - Jin S Jeong
- Department of Pathology, Dong-A University College of Medicine, Busan 602-714, South Korea
| | - Young H Yoo
- Dong-A University College of Medicine and Mitochondria Hub Regulation Center, Busan 602-714, South Korea.
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16
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Chuang CT, Guh JY, Lu CY, Wang YT, Chen HC, Chuang LY. Steap4 attenuates high glucose and S100B-induced effects in mesangial cells. J Cell Mol Med 2015; 19:1234-44. [PMID: 25817898 PMCID: PMC4459839 DOI: 10.1111/jcmm.12472] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 10/09/2014] [Indexed: 12/14/2022] Open
Abstract
Six-transmembrane epithelial antigen of prostate 4 (Steap4)-knockout mice develop hyperglycaemia and inflammation whereas Steap4 overexpression attenuates atherosclerosis in diabetic mice. Thus, we studied the roles of Steap4 in high glucose (HG, 27.5 mM) or S100B (1 μM, a ligand for the receptor for advanced glycation end-product or RAGE)-induced effects in mouse mesangial (MES13) cells. We found that HG-induced Steap4 protein expression was dependent on S100B. HG increased cell membrane, but not cytosolic, Steap4 protein expression. HG increased protein-protein interaction between Steap4 and S100B, which was confirmed by mass spectrometry of immunoprecipitated S100B. SP600125, LY294002 and AG490 attenuated S100B-induced Steap4 protein expression or gene transcriptional activity. A mutation in signal transducer and activator of transcription 3 (Stat3) site 2 of the Steap4 promoter constructs resulted in a marked decrease in HG or S100B-induced activation of Steap4 gene transcription. Overexpression of Steap4 attenuates HG or S100B-induced collagen IV, fibronectin and cyclooxygenase 2 protein expression. Overexpression of Steap4 attenuates HG or S100B-induced transforming growth factor-β (TGF-β). Moreover, overexpression of Steap4 attenuates S100B-induced signalling. Finally, overexpressing Steap4 attenuated renal expression of fibronectin, S100B, TGF-β, type IV collagen, p-Akt, p-extracellular signal regulated kinase 1/2 and p-Stat3 in streptozotocin-diabetic mice. Thus, overexpression of Steap4 attenuated HG or S100B-induced effects in MES13 cells and attenuated some of S100B-induced effects in diabetic mouse kidneys.
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Affiliation(s)
- Chao-Tang Chuang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jinn-Yuh Guh
- Department of Internal Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chi-Yu Lu
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yeng-Tseng Wang
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hung-Chun Chen
- Department of Internal Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Lea-Yea Chuang
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Center for Lipid and Glycomedicine Research, Kaohsiung Medical University, Kaohsiung, Taiwan
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