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Lin PH, Kuo TH, Chen CC, Jian CY, Chen CW, Wang KL, Kuo YC, Shen HY, Hsia SM, Wang PS, Lieu FK, Wang SW. Downregulation of testosterone production through luteinizing hormone receptor regulation in male rats exposed to 17α-ethynylestradiol. Sci Rep 2020; 10:1576. [PMID: 32005928 PMCID: PMC6994641 DOI: 10.1038/s41598-020-58125-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 01/03/2020] [Indexed: 11/09/2022] Open
Abstract
The pharmaceutical 17α-ethynylestradiol (EE2) is considered as an endocrine-disrupting chemical that interferes with male reproduction and hormonal activation. In this study, we investigated the molecular mechanism underlying EE2-regulatory testosterone release in vitro and in vivo. The results show that EE2 treatment decreased testosterone release from rat Leydig cells. Treatment of rats with EE2 reduced plasma testosterone levels and decreased the sensitivity of human chorionic gonadotropin (hCG). EE2 reduced luteinizing hormone receptor (LHR) expression associated with decreased cAMP generation by downregulation of adenylyl cyclase activity and decreased intracellular calcium-mediated pathways. The expression levels of StAR and P450scc were decreased in Leydig cells by treatment of rats with EE2 for 7 days. The sperm motility in the vas deferens and epididymis was reduced, but the histopathological features of the testis and the total sperm number of the vas deferens were not affected. Moreover, the serum dihydrotestosterone (DHT) level was decreased by treatment with EE2. The prostate gland and seminal vesicle atrophied significantly, and their expression level of 5α-reductase type II was reduced after EE2 exposure. Taken together, these results demonstrate an underlying mechanism of EE2 to downregulate testosterone production in Leydig cells, explaining the damaging effects of EE2 on male reproduction.
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Affiliation(s)
- Po-Han Lin
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan.,School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, 11031, Taiwan.,Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan
| | - Tsung-Hsien Kuo
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan
| | - Chih-Chieh Chen
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan.,Department of Nutrition, China Medical University, Taichung, 40402, Taiwan
| | - Cai-Yun Jian
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan
| | - Chien-Wei Chen
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan.,College of Human Development and Health, National Taipei University of Nursing and Health Sciences, Taipei, 11219, Taiwan
| | - Kai-Lee Wang
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan.,Department of Nursing, Ching Kuo Institute of Management and Health, Keelung, 20301, Taiwan
| | - Yuh-Chen Kuo
- Department of Urology, Yangming Branch of Taipei City Hospital, Taipei, 11146, Taiwan
| | - Heng-Yi Shen
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei, 11212, Taiwan
| | - Shih-Min Hsia
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, 11031, Taiwan.,Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei, 11031, Taiwan
| | - Paulus S Wang
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan. .,Medical Center of Aging Research, China Medical University Hospital, Taichung, 40402, Taiwan. .,Department of Biotechnology, College of Health Science, Asia University, Taichung, 41354, Taiwan. .,Department of Medical Research, Taipei Veterans General Hospital, Taipei, 11217, Taiwan.
| | - Fu-Kong Lieu
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei, 11212, Taiwan. .,Department of Physical Medicine and Rehabilitation, National Defense Medical Center, Taipei, 11490, Taiwan.
| | - Shyi-Wu Wang
- Aesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan, 33378, Taiwan. .,Department of Physiology and Pharmacology, College of Medicine, Chang Gung University, Taoyuan, 33302, Taiwan.
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Chen CC, Chen CW, Lin PH, Chou JC, Weng TC, Jian CY, Hu S, Lai WH, Lieu FK, Wang SW, Wang PS. Interactive Effect of Corticosterone and Lactate on Regulation of Testosterone Production in Rat Leydig Cells. J Cell Physiol 2017; 232:2135-2144. [PMID: 27886378 DOI: 10.1002/jcp.25700] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 11/21/2016] [Indexed: 11/11/2022]
Abstract
The increasing intensity of exercise enhanced corticosterone and lactate production in both humans and rodents. Our previous studies also demonstrated that lactate could stimulate testosterone production in vivo and in vitro. However, the production of testosterone in response to combined corticosterone and lactate on Leydig cells, and underlying molecular mechanisms are remained unclear. This study investigated the changes in testosterone levels of Leydig cells upon exposure to lactate, corticosterone or combination of both, and revealed the detailed mechanisms. Leydig cells were isolated from rat testes, and treated with different concentrations of lactate (2.5-20 mM), cortiosterone (10-9 -10-4 M) and lactate plus corticosterone. The production of testosterone were assayed by radioimmunoassay, and the key molecular proteins, including luteinizing hormone receptor (LHR), protein kinase A (PKA), steroidogenic acute regulatory protein (StAR), and cholesterol P450 side-chain cleavage enzyme (P450scc) involved in testosterone production were performed by Western blot. Results showed that testosterone levels were significantly increased with lactate, while decresed with corticosterone and lactate plus corticosterone treatment. Protein expressions of LHR and P450scc were upregulated with lactate treatment. However, PKA and P450scc were downregulated by lactate plus corticosterone treatment. This downregulation was followed by decreased testoterone levels in Leydig cells. Furthermore, acetylated cAMP, which activates testosterone production was increased with lactate, but not altered by conrtiosterone. Our findings conclude that corticosterone may interfere with lactate, and restrict lactate-stimulated testosterone production in Leydig cells. J. Cell. Physiol. 232: 2135-2144, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Chih-Chieh Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Chien-Wei Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Po-Han Lin
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Jou-Chun Chou
- Medical Center of Aging Research, China Medical University Hospital, Taichung, Taiwan, Republic of China.,Department of Life Sciences, National Chung-Hsing University, Taichung, Taiwan, Republic of China
| | - Ting-Chun Weng
- Medical Center of Aging Research, China Medical University Hospital, Taichung, Taiwan, Republic of China
| | - Cai-Yun Jian
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Sindy Hu
- Aesthetic Medical Center, Department of Dermatology, Chang-Gung Memorial Hospital, Taoyuan, Taiwan, Republic of China.,Department of Medicine, College of Medicine, Chang-Gung University, Taoyuan, Taiwan, Republic of China
| | - Wei-Ho Lai
- Department of Rehabilitation, Cheng-Hsin General Hospital, Taipei, Taiwan, Republic of China
| | - Fu-Kong Lieu
- Department of Rehabilitation, Cheng-Hsin General Hospital, Taipei, Taiwan, Republic of China
| | - Shyi-Wu Wang
- Department of Life Sciences, National Chung-Hsing University, Taichung, Taiwan, Republic of China.,Department of Physiology and Pharmacology, College of Medicine, Chang-Gung University, Taoyuan, Taiwan, Republic of China
| | - Paulus S Wang
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China.,Medical Center of Aging Research, China Medical University Hospital, Taichung, Taiwan, Republic of China.,Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan, Republic of China.,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China
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Chen CW, Chen CC, Jian CY, Lin PH, Chou JC, Teng HS, Hu S, Lieu FK, Wang PS, Wang SW. Attenuation of exercise effect on inflammatory responses via novel role of TLR4/PI3K/Akt signaling in rat splenocytes. J Appl Physiol (1985) 2016; 121:870-877. [DOI: 10.1152/japplphysiol.00393.2016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/16/2016] [Indexed: 01/07/2023] Open
Abstract
Moderate exercise diminishes proinflammation cytokine production in various types of immune cells, but the intracellular signaling pathways involved are not completely understood. Phosphoinositide 3-kinase (PI3K)/Akt, a crucial downstream protein of toll-like receptor 4 (TLR4), may modulate inflammation. The present study aimed to investigate the effects of exercises on lipopolysaccharide (LPS)-stimulated inflammatory response in splenocytes and to explore potential mechanisms of the PI3K/Akt pathway. Male rats were divided into sedentary and exercise groups. Animals in the exercise group underwent endurance training 30 min/day, 7 days/wk, at the speed of 20 m/min on a treadmill for 1 wk. Here, we showed that exercise 1) attenuated TLR4, 2) increased PI3K/phospho-Akt (p-Akt), and 3) diminished phospho-nuclear factor-κB (p-NF-κB) expression. In addition, administration of splenocytes isolated from trained rats with LPS in vitro showed 1) reduced tumor necrosis factor (TNF-α), interleukin 6 (IL-6), and nitric oxide secretion and 2) decreased splenocyte proliferation. The plasma corticosterone (CCS) level in the exercise group was higher than that in the sedentary group. We confirmed that CCS down-regulated TNF-α and IL-6 secretion in response to LPS in rat splenocytes. Dexamethasone also significantly attenuated LPS-evoked release of TNF-α and IL-6 in a dose-dependent manner. These findings suggested that exercise dampened the secretion of inflammation mediators probably through partial inhibition of TLR4 and p-NF-κB and activation of PI3K/p-Akt expression in the spleen.
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Affiliation(s)
- Chien-Wei Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chih-Chieh Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Cai-Yun Jian
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Po-Han Lin
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Jou-Chun Chou
- Medical Center of Aging Research, China Medical University Hospital, Taichung, Taiwan
| | - Hsueh-Su Teng
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei, Taiwan
| | - Sindy Hu
- Aesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
- Department of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Fu-Kong Lieu
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei, Taiwan
| | - Paulus S. Wang
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Medical Center of Aging Research, China Medical University Hospital, Taichung, Taiwan
- Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan; and
| | - Shyi-Wu Wang
- Aesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
- Department of Physiology and Pharmacology, College of Medicine, Chang Gung University, Taoyuan, Taiwan
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Lin PH, Jian CY, Chou JC, Chen CW, Chen CC, Soong C, Hu S, Lieu FK, Wang PS, Wang SW. Induction of renal senescence marker protein-30 (SMP30) expression by testosterone and its contribution to urinary calcium absorption in male rats. Sci Rep 2016; 6:32085. [PMID: 27553527 PMCID: PMC4995462 DOI: 10.1038/srep32085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 08/02/2016] [Indexed: 11/09/2022] Open
Abstract
The aim of this study was to investigate the involvement of androgen, mainly testosterone, in the expression of renal senescence marker protein-30 (SMP30) in male rats. We found that the renal SMP30 expression was up-regulated by endogenous testosterone stimulation during puberty. Interestingly, androgen-deficient orchidectomized (ORX) rats exhibited lower SMP30 mRNA and protein expression in the kidney, and that was restored by testosterone propionate (TP) replacement. Abrogation of androgen receptor (AR) activity by co-treatment with flutamide abolished testosterone-induced SMP30 expression in the kidney as well as in the NRK52E cells. However, SMP30 expression was unaltered in the liver of ORX rats. We also showed a positive correlation between renal SMP30 expression and plasma testosterone level during the aging process. TP-induced SMP30 expression in ovariectomized (OVX) rats was observed and was an evidence to explain the gender difference of SMP30 levels. Immunofluorescence assay showed that renal SMP30 was specifically expressed in the proximal tubular segments of the kidney. The urinary Ca(2+) level was increased in both ORX and male aging rats. Taken together, our results indicate a novel role of testosterone in regulating SMP30 expression specifically in the kidney to contribute to urinary calcium absorption.
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Affiliation(s)
- Po-Han Lin
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, Republic of China
| | - Cai-Yun Jian
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, Republic of China
| | - Jou-Chun Chou
- Medical Center of Aging Research, China Medical University Hospital, Taichung 40402, Taiwan, Republic of China
| | - Chien-Wei Chen
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, Republic of China
| | - Chih-Chieh Chen
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, Republic of China
| | - Christina Soong
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei 11212, Taiwan, Republic of China
| | - Sindy Hu
- Aesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan 33378, Taiwan, Republic of China.,Department of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, Republic of China
| | - Fu-Kong Lieu
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei 11212, Taiwan, Republic of China
| | - Paulus S Wang
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, Republic of China.,Medical Center of Aging Research, China Medical University Hospital, Taichung 40402, Taiwan, Republic of China.,Department of Biotechnology, College of Health Science, Asia University, Taichung 41354, Taiwan, Republic of China.,Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei 11217, Taiwan, Republic of China
| | - Shyi-Wu Wang
- Aesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan 33378, Taiwan, Republic of China.,Department of Physiology and Pharmacology, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, Republic of China
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5
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Chen CW, Jian CY, Lin PH, Chen CC, Lieu FK, Soong C, Hsieh CC, Wan CY, Idova G, Hu S, Wang SW, Wang PS. Role of testosterone in regulating induction of TNF-α in rat spleen via ERK signaling pathway. Steroids 2016; 111:148-154. [PMID: 26996389 DOI: 10.1016/j.steroids.2016.03.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/09/2016] [Accepted: 03/11/2016] [Indexed: 02/06/2023]
Abstract
Spleen is a pivotal organ for regulating immune homeostasis. It has been shown that testosterone diminishes secretion of various inflammatory molecules under multiple conditions. However, the mechanisms of action of endogenous testosterone affecting immune responses in the spleen remain unknown. The aim of the present study was to evaluate the immune functions of the spleen in response to testosterone withdrawal after orchidectomy, and the impact of splenocytes on the bacterial endotoxin lipopolysaccharide (LPS)-induced secretion of inflammatory molecules. Male rats were divided into 3 groups, i.e. intact, orchidectomized (Orch) and orchidectomized plus replacement of testosterone propionate (TP) (Orch+TP). The Orch and Orch+TP rats underwent bilateral orchidectomy one week before TP replacement (2mg/kg body weight) or sesame oil in intact rats as controls for seven days. Orch resulted in a significant increase of spleen weight and basal secretion of nitric oxide (NO) from splenocytes. Additionally, LPS up-regulated cell proliferation and the secretion of tumor necrosis factor-alpha (TNF-α) in splenocytes of Orch rats. Orch further up-regulated phosphorylation of extracellular signal-regulated kinases. Interestingly, the plasma corticosterone concentration in the Orch group was higher than that in the intact and Orch+TP groups. Deficiency of testosterone-elevated TNF-α and NO secretion in response to LPS were confirmed in the rat splenocytes. Testosterone also significantly attenuated LPS-elicited release of TNF-α and NO in a dose-dependent manner. However, testosterone did not suppress splenic blastogenesis at doses in the 10(-10)-10(-7)M concentration range. In this context, testosterone might have a protective role against inflammatory responses in the spleen. The present study provides evidence to indicate that testosterone might modulate the immune system.
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Affiliation(s)
- Chien-Wei Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan
| | - Cai-Yun Jian
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan
| | - Po-Han Lin
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan
| | - Chih-Chieh Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan
| | - Fu-Kong Lieu
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei 11280, Taiwan
| | - Christina Soong
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei 11280, Taiwan
| | - Chu-Chun Hsieh
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan
| | - Chi-Yun Wan
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan
| | - Galina Idova
- State Scientific Research Institute of Physiology and Basic Medicine, Timakova Street, 4, Novosibirsk 630117, Russia
| | - Sindy Hu
- Aesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan; Department of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Shyi-Wu Wang
- Department of Physiology and Pharmacology, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan; Aesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan.
| | - Paulus S Wang
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan; Medical Center of Aging Research, China Medical University Hospital, Taichung 40402, Taiwan; Department of Biotechnology, College of Health Science, Asia University, Taichung 41354, Taiwan; Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei 11217, Taiwan.
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Chen CW, Chen CC, Jian CY, Lin PH, Wan CY, Wang SW, Wang PS. Anti-Inflammatory Effect of Exercise Training via Elevation of Testosterone Secretion in Rat Splenocyte. Med Sci Sports Exerc 2016. [DOI: 10.1249/01.mss.0000486195.24874.b2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lieu FK, Lin CY, Wang PS, Jian CY, Yeh YH, Chen YA, Wang KL, Lin YC, Chang LL, Wang GJ, Wang SW. Effect of swimming on the production of aldosterone in rats. PLoS One 2014; 9:e87080. [PMID: 25289701 PMCID: PMC4188567 DOI: 10.1371/journal.pone.0087080] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 12/18/2013] [Indexed: 01/09/2023] Open
Abstract
It has been demonstrated that exercise is one of the stresses known to increase the aldosterone secretion. Both potassium and angiotensin II (Ang II) levels are shown to be correlated with aldosterone production during exercise, but the mechanism is still unclear. In an in vivo study, male rats were catheterized via right jugular vein (RJV), and divided into four groups namely water immersion, swimming, lactate infusion (13 mg/kg/min) and pyruvate infusion (13 mg/kg/min) groups. Each group was treated for 10 min. Blood samples were collected at 0, 10, 15, 30, 60 and 120 min from RJV after administration. In an in vitro study, rat zona glomerulosa (ZG) cells were challenged by lactate (1–10 mM) in the presence or absence of Ang II (10−8 M) for 60 min. The levels of aldosterone in plasma and medium were measured by radioimmunoassay. Cell lysates were analyzed by immunoblotting assay. After exercise and lactate infusion, plasma levels of aldosterone and lactate were significantly higher than those in the control group. Swimming for 10 min significantly increased the plasma Ang II levels in male rats. Administration of lactate plus Ang II significantly increased aldosterone production and enhanced protein expression of steroidogenic acute regulatory protein (StAR) in ZG cells. These results demonstrated that acute exercise led to the increase of both aldosterone and Ang II secretion, which is associated with lactate action on ZG cells and might be dependent on the activity of renin-angiotensin system.
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Affiliation(s)
- Fu-Kong Lieu
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei, Taiwan, ROC
| | - Chih-Yung Lin
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Paulus S. Wang
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
- Graduate Institute of Basic Medical Science, College of Medicine, China Medical University, and Medical Center of Aging Research, China Medical University Hospital, Taichung, Taiwan, ROC
- Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan, ROC
- Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Cai-Yun Jian
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Yung-Hsing Yeh
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Yi-An Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Kai-Lee Wang
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Yi-Chun Lin
- Department of Rehabilitation, Cheng Hsin General Hospital, Taipei, Taiwan, ROC
| | - Ling-Ling Chang
- Department of Chemical Engineering, College of Engineering, Chinese Culture University, Taipei, Taiwan, ROC
| | - Guei-Jane Wang
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan, ROC
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan, ROC
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan, ROC
| | - Shyi-Wu Wang
- Department of Physiology and Pharmacology, College of Medicine, Chang-Gung University, Taoyuan, Taiwan, ROC
- * E-mail:
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Jian CY, Chen YA, Chang CH, Lin SJ, Yeh YH, Wang SW, Wang PS. Age-Related Impairments of Testosterone and Luteinizing Hormone Secretions in Male Rats Involving Decreases of Cyclic AMP Production. Biol Reprod 2012. [DOI: 10.1093/biolreprod/87.s1.532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lin PH, Jian CY, Huang WC, Lin WW, Sun CH, Wang PS. Correlations Between Testosterone Secretion and Liver IGF-1/SMP-30 in Rats During Aging. Biol Reprod 2012. [DOI: 10.1093/biolreprod/87.s1.533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Huang WJ, Jian CY, Yeh YH, Kuo TH, Wang PS. Effects of Anti-Ghrelin Serum on Plasma Acrylated-Ghrelin, GH, IGF-1 Concentration, and Mechanism of GI Motility in Male Rats. Biol Reprod 2011. [DOI: 10.1093/biolreprod/85.s1.426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jian CY, Yeh YH, Lin PH, Hsu RL, Ho CH, Chang YJ, Wang PS. Stimulatory Effect of Arecoline on the Progesterone Production by Rat Granulosa Cells. Biol Reprod 2011. [DOI: 10.1093/biolreprod/85.s1.699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wang PS, Jian CY, Lin CY, Hsu RL, Sun CH, Lin PH, Kuo TH, Yeh YH. Adaptation of the Secretion of Aldosterone and Angiotensin II to Exercise in Rats. Biol Reprod 2011. [DOI: 10.1093/biolreprod/85.s1.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Lin HW, Jian CY, Chang YC, Huang WJ, Hsu RL, Ho CH, Wang PS. Effects of Nonylphenol on the Production of Progesterone by Rat Granulosa Cells. Biol Reprod 2010. [DOI: 10.1093/biolreprod/83.s1.641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Hsu RL, Ho CH, Chan CJ, Lin HW, Jian CY, Chang YC, Wang PS. Production of Aldosterone and Corticosterone in Polycystic Ovary Syndrome (PCOS) Rats. Biol Reprod 2010. [DOI: 10.1093/biolreprod/83.s1.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chang YC, Wang KL, Hsu RL, Jian CY, Hsia SM, Wang PS. Effects of Nonylphenol on the Production of Testosterone by Rat Leydig Cells. Biol Reprod 2010. [DOI: 10.1093/biolreprod/83.s1.525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jian CY, Wang KL, Hsia SM, Chang YC, Wang PS. Effects of Alachlor on the Testosterone Release in Rat Leydig Cells. Biol Reprod 2010. [DOI: 10.1093/biolreprod/83.s1.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jian CY, Lin CY, Chang YJ, Huang WJ, Yu CH, Wang PS. Chronic Effects of Amphetamine and Methamphetamine on the Testosterone Production in Rats. Biol Reprod 2008. [DOI: 10.1093/biolreprod/78.s1.119c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Wang KL, Yu CH, Huang WJ, Jian CY, Lin CY, Wang PS. Effects of Acrolein and Nicotine on the Secretion of Testosterone In Vivo and In Vitro. Biol Reprod 2008. [DOI: 10.1093/biolreprod/78.s1.115a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chang YJ, Jian CY, Wang PS. EFFECTS OF INSULIN ON TESTOSTERONE SECRETION IN MALE RATS WITH MILD STREPTOZOTOCIN-INDUCED DIABETES MELLITUS. Biol Reprod 2007. [DOI: 10.1093/biolreprod/77.s1.209b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Jian CY, Yokobori AT. The effect of diameter ratio between vascular substitute and blood vessel on anastomosis. Biomed Mater Eng 2000; 9:219-31. [PMID: 10674176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
It is necessary to maintain mechanical compatibility between a blood vessel and a vascular substitute to promote encapsulation around the anastomosed part. From this point of view, using linear elastic theory, we had previously performed stress analyses at the part anastomosed by tissue adhesion, in order to propose some methods of preventing stress concentration at this junction. In this study, based on the previous analyses, we have attempted to develop a concept that can be applied under the conditions of operation. That is, the initial diameter of a vascular substitute with high rigidity is chosen larger than that of a blood vessel. This will reduce the stress concentration around the anastomosed part, on average, during expansion of the blood vessel. We analysed the optimum diameter ratio between the vascular substitute and the blood vessel which causes the least stress concentration, on average, during this process, using linear elastic theory. Furthermore, numerical analyses of blood vessel deformation were performed using various nonlinear stress-strain laws. These results were compared to the analytical solution based on linear elastic theory.
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Affiliation(s)
- C Y Jian
- Faculty of Engineering, Fracture Research Institute, Tohoku University, Sendai City, Japan
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Geng JG, Chen HZ, Yang YF, Jian CY, Qian ZH, Han QQ, Yao YM. Separation and purification of creatine kinase BB isoenzyme and neuron-specific enolase on DEAE-Sephadex A-50 chromatography. Clin Chim Acta 1988; 176:233-5. [PMID: 3180474 DOI: 10.1016/0009-8981(88)90215-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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