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Loeffler I, Ziller N. Sex-Related Aspects in Diabetic Kidney Disease-An Update. J Clin Med 2023; 12:jcm12082834. [PMID: 37109170 PMCID: PMC10145498 DOI: 10.3390/jcm12082834] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/05/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Differences between the sexes exist in many diseases, and in most cases, being a specific sex is considered a risk factor in the development and/or progression. This is not quite so clear in diabetic kidney disease (DKD), the development and severity of which depends on many general factors, such as the duration of diabetes mellitus, glycemic control, and biological risk factors. Similarly, sex-specific factors, such as puberty or andro-/menopause, also determine the microvascular complications in both the male and female sex. In particular, the fact that diabetes mellitus itself influences sex hormone levels, which in turn seem to be involved in renal pathophysiology, highlights the complexity of the question of sex differences in DKD. The major objective of this review is to summarize and simplify the current knowledge on biological sex-related aspects in the development/progression but also treatment strategies of human DKD. It also highlights findings from basic preclinical research that may provide explanations for these differences.
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Affiliation(s)
- Ivonne Loeffler
- Department of Internal Medicine III, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany
| | - Nadja Ziller
- Department of Internal Medicine III, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany
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Gurbuz P, Duzova H, Taslidere AC, Gul CC. Effects of noopept on ocular, pancreatic and renal histopathology in streptozotocin induced prepubertal diabetic rats. Biotech Histochem 2023:1-12. [PMID: 36946173 DOI: 10.1080/10520295.2023.2187460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023] Open
Abstract
Diabetes mellitus (DM) is a chronic disease at all ages including childhood and puberty. Failure to treat DM can cause retinopathy, nephropathy and neuropathy. Endocrine and metabolic changes during the pubertal period complicate management of DM. Noopept is a cognitive enhancer that exhibits antidiabetic properties. We investigated the effect of noopept on the histopathology of the cornea, retina, kidney and pancreas in pubertal diabetic rats. We allocated 60 prepubertal male rats randomly into six groups of 10: untreated control (C), DM control (DC), noopept control (NC), DM + noopept (D + N), DM + insulin (D + I) and DM + insulin + noopept (D + I + N). DM was induced by streptozotocin in the DC, D + N, D + I and D + I + N groups. Noopept was administered to the NC, D + N and D + I + N groups; insulin was administered to the D + I and D + I + N groups for 14 days. On day 18 of the experiment, animals were sacrificed and eyes, kidneys and pancreata were excised for histological investigation. Renal tubule diameter and corneal and retinal thickness were increased significantly in DC groups compared to the control group. The D + I, D + N and D + I + N groups exhibited fewer DM induced pathological changes than the DC group. The D + I + N group exhibited no significant differences in renal tubule diameter and corneal and retinal thickness compared to the DC group. Our findings suggest that noopept is protective against DM end organ complications in streptozotocin induced diabetic pubertal rats.
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Affiliation(s)
- Perihan Gurbuz
- Vocational School of Health Services, Inonu University, Malatya, Turkey
| | - Halil Duzova
- Physiology Department, Inonu University Faculty of Medicine, Malatya, Turkey
| | - Asli Cetin Taslidere
- Histology and Embryology Department, Inonu University Faculty of Medicine, Malatya, Turkey
| | - Cemile Ceren Gul
- Histology and Embryology Department, Inonu University Faculty of Medicine, Malatya, Turkey
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Ziller N, Kotolloshi R, Esmaeili M, Liebisch M, Mrowka R, Baniahmad A, Liehr T, Wolf G, Loeffler I. Sex Differences in Diabetes- and TGF-β1-Induced Renal Damage. Cells 2020; 9:E2236. [PMID: 33023010 PMCID: PMC7600610 DOI: 10.3390/cells9102236] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/24/2020] [Accepted: 10/01/2020] [Indexed: 12/25/2022] Open
Abstract
While females are less affected by non-diabetic kidney diseases compared to males, available data on sex differences in diabetic nephropathy (DN) are controversial. Although there is evidence for an imbalance of sex hormones in diabetes and hormone-dependent mechanisms in transforming growth factor β1 (TGF-β1) signaling, causes and consequences are still incompletely understood. Here we investigated the influence of sex hormones and sex-specific gene signatures in diabetes- and TGF-β1-induced renal damage using various complementary approaches (a db/db diabetes mouse model, ex vivo experiments on murine renal tissue, and experiments with a proximal tubular cell line TKPTS). Our results show that: (i) diabetes affects sex hormone concentrations and renal expression of their receptors in a sex-specific manner; (ii) sex, sex hormones and diabetic conditions influence differences in expression of TGF-β1, its receptor and bone morphogenetic protein 7 (BMP7); (iii) the sex and sex hormones, in combination with variable TGF-β1 doses, determine the net outcome in TGF-β1-induced expression of connective tissue growth factor (CTGF), a profibrotic cytokine. Altogether, these results suggest complex crosstalk between sex hormones, sex-dependent expression pattern and profibrotic signals for the precise course of DN development. Our data may help to better understand previous contradictory findings regarding sex differences in DN.
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Affiliation(s)
- Nadja Ziller
- Department of Internal Medicine III, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (N.Z.); (M.L.); (R.M.)
| | - Roland Kotolloshi
- Institute of Human Genetics, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (R.K.); (M.E.); (A.B.); (T.L.)
| | - Mohsen Esmaeili
- Institute of Human Genetics, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (R.K.); (M.E.); (A.B.); (T.L.)
| | - Marita Liebisch
- Department of Internal Medicine III, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (N.Z.); (M.L.); (R.M.)
| | - Ralf Mrowka
- Department of Internal Medicine III, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (N.Z.); (M.L.); (R.M.)
| | - Aria Baniahmad
- Institute of Human Genetics, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (R.K.); (M.E.); (A.B.); (T.L.)
| | - Thomas Liehr
- Institute of Human Genetics, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (R.K.); (M.E.); (A.B.); (T.L.)
| | - Gunter Wolf
- Department of Internal Medicine III, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (N.Z.); (M.L.); (R.M.)
| | - Ivonne Loeffler
- Department of Internal Medicine III, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; (N.Z.); (M.L.); (R.M.)
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Makary S, Abdo M, Hassan WA, Tawfik MK. Angiotensin blockade attenuates diabetic nephropathy in hypogonadal adult male rats. Can J Physiol Pharmacol 2019; 97:708-720. [PMID: 30970225 DOI: 10.1139/cjpp-2018-0572] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This study examined the effect of the aromatase inhibitor letrozole (0.5 mg/kg) alone or in combination with the angiotensin-receptor blocker valsartan (30 mg/kg) against streptozocin-induced diabetic nephropathy (DN) in hypogonadal (HG) rats for 12 weeks. First, we tested the HG effect on hormone levels, inflammatory cytokines, and oxidative stress in nondiabetic (ND) and diabetic (D) rats. HG was induced with the luteinizing hormone-releasing hormone antagonist cetrorelix (0.71 mg/kg). Diabetes enhanced hormonal hypogonadism and increased inflammation and oxidative stress. Next, experiments examined the effect of early letrozole and valsartan intervention on DN in HG rats. HG-ND and HG-D rats were treated with letrozole alone or in combination with valsartan. HG-D rats developed proteinuria and had increased blood urea nitrogen and creatinine, and histopathological evidence of renal injury, including glomerular hypertrophy and mesangial expansion. Valsartan alone or in combination with letrozole reduced proteinuria, improved renal functions, and reduced diabetes-induced renal angiotensin II. Both agents ameliorated nuclear factor kappa light chain enhancer of activated B cells, interleukin 1β, interleukin 6, and tumor necrosis factor alpha levels. The combination decreased superoxide dismutase, malondialdehyde, and glutathione peroxidase levels, and prevented glomerular hypertrophy. In HG-D rats, valsartan reduced renal collagen IV and transforming growth factor-beta 1, especially when the testosterone level was corrected by letrozole. Thus, normalizing testosterone and inhibiting renal angiotensin II have a renoprotective effect against DN in HG male rats.
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Affiliation(s)
- Samy Makary
- a Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Mohamed Abdo
- a Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Wael Abdo Hassan
- b Department of Pathology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt.,c Department of Basic Sciences, Sulaiman Al-Rajhi College of Medicine, Kingdom of Saudi Arabia
| | - Mona K Tawfik
- d Department of Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
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Clotet S, Riera M, Pascual J, Soler MJ. RAS and sex differences in diabetic nephropathy. Am J Physiol Renal Physiol 2016; 310:F945-F957. [PMID: 26962103 DOI: 10.1152/ajprenal.00292.2015] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The incidence and progression of kidney diseases are influenced by sex. The renin-angiotensin system (RAS) is an important regulator of cardiovascular and renal function. Sex differences in the renal response to RAS blockade have been demonstrated. Circulating and renal RAS has been shown to be altered in type 1 and type 2 diabetes; this enzymatic cascade plays a critical role in the development of diabetic nephropathy (DN). Angiotensin converting enzyme (ACE) and ACE2 are differentially regulated depending on its localization within the diabetic kidney. Furthermore, clinical and experimental studies have shown that circulating levels of sex hormones are clearly modulated in the context of diabetes, suggesting that sex-dependent RAS regulation may be also be affected in these individuals. The effect of sex hormones on circulating and renal RAS may be involved in the sex differences observed in DN progression. In this paper we will review the influence of sex hormones on RAS expression and its relation to diabetic kidney disease. A better understanding of the sex dimorphism on RAS might provide a new approach for diabetic kidney disease treatment.
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Whitney JL, Bilkan CM, Sandberg K, Myers AK, Mulroney SE. Growth hormone exacerbates diabetic renal damage in male but not female rats. Biol Sex Differ 2013; 4:12. [PMID: 23805912 PMCID: PMC3698039 DOI: 10.1186/2042-6410-4-12] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 06/18/2013] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Human and animal studies support the idea that there are sex differences in the development of diabetic renal disease. Our lab and others have determined that in addition to Ang II (through the AT1R), growth hormone (GH) contributes to renal damage in models of renal failure; however, the impact of sex and GH on the mechanisms initiating diabetic renal disease is not known. This study examined the effect of sex and GH on parameters of renal damage in early, uncontrolled streptozotocin (STZ)-induced diabetes. METHODS Adult male and female Sprague-Dawley rats were injected with vehicle (control), STZ, or STZ + GH and euthanized after 8 weeks. RESULTS Mild but significant glomerulosclerosis (GS) and tubulointerstitial fibrosis (TIF) was observed in both kidneys from male and female diabetic rats, with GH significantly increasing GS and TIF by 30% and 25% in male rats, but not in female rats. STZ increased TGF-β expression in both kidneys from male and female rats; however, while GH had no further effect on TGF-β protein in diabetic females, GH increased TGF-β protein in the male rat's kidneys by an additional 30%. This sex-specific increase in renal injury following GH treatment was marked by increased MCP-1 and CD-68+ cell density. STZ also reduced renal MMP-2 and MMP-9 protein expression in both kidneys from male and female rats, but additional decreases were only observed in GH-treated diabetic male rats. The sex differences were independent of AT1R activity. CONCLUSIONS These studies indicate that GH affects renal injury in diabetes in a sex-specific manner and is associated with an increase in pro-inflammatory mediators.
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Affiliation(s)
- Jennifer L Whitney
- Department of Physiology and Biophysics, Georgetown University Medical Center, Washington, DC 20057-1640, USA
| | - Christine Maric Bilkan
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, USA
| | - Kathryn Sandberg
- Department of Physiology and Biophysics, Georgetown University Medical Center, Washington, DC 20057-1640, USA
- Department of Medicine, Georgetown University Medical Center, Washington, DC, USA
- Center for the Study of Sex Differences in Health, Aging and Disease, Georgetown University Medical Center, Washington, DC, USA
| | - Adam K Myers
- Department of Physiology and Biophysics, Georgetown University Medical Center, Washington, DC 20057-1640, USA
- Center for the Study of Sex Differences in Health, Aging and Disease, Georgetown University Medical Center, Washington, DC, USA
| | - Susan E Mulroney
- Department of Physiology and Biophysics, Georgetown University Medical Center, Washington, DC 20057-1640, USA
- Center for the Study of Sex Differences in Health, Aging and Disease, Georgetown University Medical Center, Washington, DC, USA
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Manigrasso MB, Sawyer RT, Hutchens ZM, Flynn ER, Maric-Bilkan C. Combined inhibition of aromatase activity and dihydrotestosterone supplementation attenuates renal injury in male streptozotocin (STZ)-induced diabetic rats. Am J Physiol Renal Physiol 2012; 302:F1203-9. [PMID: 22301628 DOI: 10.1152/ajprenal.00569.2011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Our previous studies showed that streptozotocin (STZ)-induced diabetic male rats have increased estradiol and decreased testosterone levels that correlate with renal injury (Xu Q, Wells CC, Garman GH, Asico L, Escano CS, Maric C. Hypertension 51: 1218-1224, 2008). We further showed that either supplementing dihydrotestosterone (DHT) or inhibiting estradiol biosynthesis in these diabetic rats was only partially renoprotective (Manigrasso MB, Sawyer RT, Marbury DC, Flynn ER, Maric C. Am J Physiol Renal Physiol 301: F634-F640, 2011; Xu Q, Prabhu A, Xu S, Manigrassso MB, Maric C. Am J Physiol 297: F307-F315, 2009). The aim of this study was to test the hypothesis that the combined therapy of DHT supplementation and inhibition of estradiol synthesis would afford better renoprotection than either treatment alone. The study was performed in 12-wk-old male nondiabetic (ND), STZ-induced diabetic (D), and STZ-induced diabetic rats that received the combined therapy of 0.75 mg/day of DHT along with 0.15 mg · kg(-1) · day(-1) of an aromatase inhibitor, anastrozole (Dta), for 12 wk. Treatment with the combined therapy resulted in attenuation of albuminuria by 84%, glomerulosclerosis by 55%, and tubulointerstitial fibrosis by 62%. In addition, the combined treatment decreased the density of renal cortical CD68-positive cells by 70% and decreased protein expression of transforming growth factor-β protein expression by 60%, collagen type IV by 65%, TNF-α by 55%, and IL-6 by 60%. We conclude that the combined treatment of DHT and blocking aromatase activity in diabetic male STZ-induced diabetic rats provides superior treatment than either treatment alone in the prevention of diabetic renal disease.
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Affiliation(s)
- Michaele B Manigrasso
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State St., Jackson, MS 39216, USA
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Jahn MP, Gomes LF, Jacob MHVM, da Rocha Janner D, Araújo ASDR, Belló-Klein A, Ribeiro MFM, Kucharski LC. The effect of dehydroepiandrosterone (DHEA) on renal function and metabolism in diabetic rats. Steroids 2011; 76:564-70. [PMID: 21349280 DOI: 10.1016/j.steroids.2011.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 02/15/2011] [Accepted: 02/15/2011] [Indexed: 01/12/2023]
Abstract
Dehydroepiandrosterone (DHEA) is an endogenous steroid hormone involved in a number of biological actions in humans and rodents, but its effects on renal tissue have not yet been fully understood. The aim of this study is to assess the effect of DHEA treatment on diabetic rats, mainly in relation to renal function and metabolism. Diabetic rats were treated with subcutaneous injections of a 10mg/kg dose of DHEA diluted in oil. Plasma glucose and creatinine, in addition to urine creatinine, were quantified espectophotometrically. Glucose uptake and oxidation were quantified using radioactive glucose, the urinary Transforming Growth Factor β(1) (TGF-β(1)) was assessed by enzyme immunoassay, and the total glutathione in the renal tissue was also measured. The diabetic rats displayed higher levels of glycemia, and DHEA treatment reduced hyperglycemia. Plasmatic creatinine levels were higher in the diabetic rats treated with DHEA, while creatinine clearance was lower. Glucose uptake and oxidation were lower in the renal medulla of the diabetic rats treated with DHEA, and urinary TGF-β(1), as well as total gluthatione levels, were higher in the diabetic rats treated with DHEA. DHEA treatment was not beneficial to renal tissue, since it reduced the glomerular filtration rate and renal medulla metabolism, while increasing the urinary excretion of TGF-β(1) and the compensatory response by the glutathione system, probably due to a mechanism involving a pro-oxidant action or a pro-fibrotic effect of this androgen or its derivatives. In conclusion, this study reports that DHEA treatment may be harmful to renal tissue, but the mechanisms of this action have not yet been fully understood.
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Affiliation(s)
- Matheus Parmegiani Jahn
- Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500, Porto Alegre, Rio Grande do Sul CEP 90050-170, Brazil.
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Kurundkar SB, Sachan N, Kodam KM, Kulkarni VM, Bodhankar SL, D'Souza S, Vanage G, Ghole VS. Novel biphenyl compound, VMNS2e, ameliorates streptozotocin-induced diabetic nephropathy in rats. J Diabetes 2010; 2:282-9. [PMID: 20923502 DOI: 10.1111/j.1753-0407.2010.00094.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
AIM To study the effect of a new biphenyl synthetic compound showing interactions with the active site of protein tyrosine phosphatase 1B by docking and molecular dynamics, VMNS2e in streptozotocin-induced diabetic nephropathy in rats with various renal function parameters and renal ultrastructure. METHODS Streptozotocin (55 mg/kg)-induced diabetic rats were orally treated once daily with VMNS2e (30, 60, and 120 mg/kg) for 8 weeks. The body weight and blood glucose levels of the rats were recorded during the study period. After 8 weeks of treatment creatinine clearance, urinary protein, blood urea nitrogen, urinary albumin excretion rate, and insulin levels were measured. An ultrastructure study of the kidney tissue was performed and the glomerular basement membrane thickness was measured. RESULTS Eight weeks of VMNS2e treatment significantly reduced the fasting blood glucose level, attenuated elevating blood urea nitrogen levels, and reduced glomerular basement membrane thickness. CONCLUSION It is concluded that VMNS2e treatment at 30 and 60 mg/kg, when given for 8 weeks, partly ameliorated early diabetic nephropathy in diabetic rats.
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Affiliation(s)
- Sucheta B Kurundkar
- Division of Biochemistry, Department of Chemistry, University of PuneDepartments, Pune, India.
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Prabhu A, Xu Q, Manigrasso MB, Biswas M, Flynn E, lliescu R, Lephart ED, Maric C. Expression of aromatase, androgen and estrogen receptors in peripheral target tissues in diabetes. Steroids 2010; 75:779-87. [PMID: 20064538 PMCID: PMC2891268 DOI: 10.1016/j.steroids.2009.12.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 12/23/2009] [Accepted: 12/29/2009] [Indexed: 01/28/2023]
Abstract
Our previous studies have shown that diabetes in the male streptozotocin (STZ)-induced diabetic rat is characterized by a decrease in circulating testosterone and concomitant increase in estradiol levels. Interestingly, this increase in estradiol levels persists even after castration, suggesting extra-testicular origins of estradiol in diabetes. The aim of the present study was to examine whether other target organs of diabetes may be sources of estradiol. The study was performed in male Sprague-Dawley non-diabetic (ND), STZ-induced diabetic (D) and STZ-induced diabetic castrated (Dcas) rats (n=8-9/group). 14 weeks of diabetes was associated with decreased testicular (ND, 26.3+/-4.19; D, 18.4+/-1.54; P<0.05), but increased renal (ND, 1.83+/-0.92; D, 7.85+/-1.38; P<0.05) and ocular (D, 23.4+/-3.66; D, 87.1+/-28.1; P<0.05) aromatase activity. This increase in renal (Dcas, 6.30+/-1.25) and ocular (Dcas, 62.7+/-11.9) aromatase activity persisted after castration. The diabetic kidney also had increased levels of tissue estrogen (ND, 0.31+/-0.01; D, 0.51+/-0.11; Dcas, 0.45+/-0.08) as well as estrogen receptor alpha protein expression (ND, 0.63+/-0.09; D, 1.62+/-0.28; Dcas, 1.38+/-0.20). These data suggest that in male STZ-induced diabetic rats, tissues other than the testis may become sources of estradiol. In particular, the diabetic kidney appears to produce estradiol following castration, a state that is associated with a high degree or renal injury. Overall, our data provides evidence for the extra-testicular source of estradiol that in males, through an intracrine mechanism, may contribute to the development and/or progression of end-organ damage associated with diabetes.
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Affiliation(s)
- Anjali Prabhu
- Department of Medicine, Georgetown University Medical Center, 4000 Reservoir road NW, Washington, DC, 20057
| | - Qin Xu
- Department of Medicine, Georgetown University Medical Center, 4000 Reservoir road NW, Washington, DC, 20057
| | - Michaele B. Manigrasso
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216
| | - Moumita Biswas
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216
| | - Elizabeth Flynn
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216
| | - Radu lliescu
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216
- Women's Health Research Center, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216
| | - Edwin D. Lephart
- Department of Physiology and Developmental Biology and The Neuroscience Center, Brigham Young University, Provo, UT, 84602
| | - Christine Maric
- Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216
- Women's Health Research Center, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216
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Xu Q, Prabhu A, Xu S, Manigrasso MB, Maric C. Dose-dependent effects of dihydrotestosterone in the streptozotocin-induced diabetic rat kidney. Am J Physiol Renal Physiol 2009; 297:F307-15. [PMID: 19493965 DOI: 10.1152/ajprenal.00135.2009] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We recently reported that castration exacerbates albuminuria, glomerulosclerosis, and tubulointerstitial fibrosis associated with diabetic renal disease. The aim of the present study was to examine whether these effects of castration can be attenuated with dihydrotestosterone (DHT) supplementation. The study was performed in castrated male Sprague-Dawley, streptozotocin-induced diabetic rats treated with 0 mg/day DHT (DHT(0)), 0.75 mg/day DHT (DHT(0.75)), or 2.0 mg/day DHT (DHT(2.0)) for 14 wk. Treatment with 0.75 mg/day DHT attenuated castration-associated increases in urine albumin excretion (DHT(0), 81.2 +/- 18.1; DHT(0.75), 26.57 +/- 5.8 mg/day; P < 0.05), glomerulosclerosis (DHT(0), 1.1 +/- 0.79; DHT(0.75), 0.43 +/- 0.043 arbitrary units; P < 0.001), tubulointerstitial fibrosis (DHT(0), 1.3 +/- 0.12; DHT(0.75), 1.1 +/- 0.096 AU; P < 0.05), collagen type IV [DHT(0), 3.2 +/- 0.11; DHT(0.75), 2.1 +/- 0.070 relative optical density (ROD); P < 0.01], transforming growth factor-beta (DHT(0), 3.2 +/- 0.16; DHT(0.75), 2.1 +/- 0.060 ROD; P < 0.01), IL-6 (DHT(0), 0.37 +/- 0.011; DHT(0.75), 0.27 +/- 0.014 ROD; P < 0.05), and protein expression and reduced CD68-positive cell abundance (DHT(0), 17 +/- 0.86; DHT(0.75), 4.4 +/- 0.55 cells/mm(2); P < 0.001). In contrast, treatment with 2.0 mg/day DHT exacerbated all these parameters. These data suggest that the detrimental effects of castration in the diabetic kidney can be attenuated with low doses of DHT, whereas high doses augment the adverse effects of castration, and these effects appear to be influenced by estradiol. We conclude that the effects of DHT are dose dependent but caution should be taken when DHT supplementation is considered in the treatment of diabetic renal disease.
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Affiliation(s)
- Qin Xu
- Department of Medicine, Georgetown University Medical Center, Washington, District of Columbia, USA
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Evidence of oxidative stress and mitochondrial dysfunctions in the testis of prepubertal diabetic rats. Int J Impot Res 2009; 21:198-206. [DOI: 10.1038/ijir.2009.9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Abstract
The incidence and the rate of progression of nondiabetic renal disease is generally greater in men compared with age-matched women, suggesting that the female sex is protective and/or that the male sex is a risk factor for the development and progression of nondiabetic renal disease. In diabetes, even though the male sex still appears to be a risk factor, this relationship is not as strong as it is in nondiabetic renal disease. Experimental evidence suggests that both estrogens and androgens play an important role in the pathophysiology of renal disease. Thus one of the potential mechanisms for the absence of a clear sex difference in the setting of diabetes may be alterations in sex hormone levels. Indeed, studies suggest that diabetes is a state of an imbalance in sex hormone levels; however, whether these changes correlate with the decline in renal function associated with diabetes is unclear. Furthermore, diabetic renal disease rarely develops before puberty, and the onset of puberty accelerates microalbuminuria, supporting the idea of the involvement of sex hormones in the development and progression of the disease. However, other than a handful of experimental studies indicating that treatment with or removal of sex hormones alters the course of diabetic renal disease, very few studies have actually directly examined the correlation between sex hormones and the disease development and progression. Further studies are necessary to determine the precise contribution of sex hormones in the pathophysiology of diabetic renal disease to develop novel and potentially sex-specific therapeutic treatments.
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Affiliation(s)
- Christine Maric
- Univ. of Mississippi Medical Center, 2500 North State St., Jackson, MS, 39216, USA.
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Xu Q, Wells CC, Garman JH, Asico L, Escano CS, Maric C. Imbalance in sex hormone levels exacerbates diabetic renal disease. Hypertension 2008; 51:1218-24. [PMID: 18259041 DOI: 10.1161/hypertensionaha.107.100594] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Studies suggest that the presence of testosterone exacerbates, whereas the absence of testosterone attenuates, the development of nondiabetic renal disease. However, the effects of the absence of testosterone in diabetic renal disease have not been studied. The study was performed in male Sprague-Dawley nondiabetic, streptozotocin-induced diabetic, and streptozotocin-induced castrated rats (n=10 to 11 per group) for 14 weeks. Diabetes was associated with the following increases: 3.2-fold in urine albumin excretion, 6.3-fold in glomerulosclerosis, 6.0-fold in tubulointerstitial fibrosis, 1.6-fold in collagen type I, 1.2-fold in collagen type IV, 1.3-fold in transforming growth factor-beta protein expression, and 32.7-fold in CD68-positive cell abundance. Diabetes was also associated with a 1.3-fold decrease in matrix metalloproteinase protein expression and activity. Castration further exacerbated all of these parameters. Diabetes was also associated with a 4.7-fold decrease in plasma testosterone, 2.9-fold increase in estradiol, and 2.1-fold decrease in plasma progesterone levels. Castration further decreased plasma testosterone levels but had no additional effects on plasma estradiol and progesterone. These data suggest that diabetes is associated with abnormal sex hormone levels that correlate with the progression of diabetic renal disease. Most importantly, our results suggest an important role for sex hormones in the pathophysiology of diabetic renal complications.
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Affiliation(s)
- Qin Xu
- Department of Medicine, Georgetown University Medical Center, Washington, DC 20057, USA
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