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Melchioretto EF, Zeni M, Veronez DADL, Filipak Neto F, Digner IDS, Fraga RD. Stereological study and analysis of oxidative stress during renal aging in rats. Acta Cir Bras 2020; 35:e351106. [PMID: 33331456 PMCID: PMC7748077 DOI: 10.1590/acta351106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/21/2020] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate renal histological changes by stereology and morphometry and analyze the main markers of oxidative stress in rats undergoing natural aging. METHODS Seventy two Wistar rats were divided into six groups of 12 rats each, which were euthanized at 3, 6, 9, 12, 18, and 24 months of age. Right kidney was stereologically and morphometrically analyzed to calculate the volumetric density (Vv[glom]), numerical density (Nv[glom]) and glomerular volume (Vol[glom]). Left kidney was used to determine the levels of nonprotein thiols, lipid peroxidation, and protein carbonylation, as well as the activities of superoxide-dismutase and catalase enzymes. RESULTS Both Vv[glom] and Nv[glom] values showed gradual decreases between groups. Activity of superoxide-dismutase was elevated at 24 months of age, and the levels of nonprotein thiols were higher in older animals. Greater catalase activity and protein carbonylation were observed in animals between 6 and 12 months of age but lessened in older rats. Lipid peroxidation decreased in the older groups. CONCLUSIONS Morphometric and stereological analyses revealed a gradual decrease in the volume and density of renal glomeruli during aging, as well as kidney atrophy. These findings related to oxidative stress clarify many changes occurring in kidney tissues during senescence in rats.
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Affiliation(s)
- Eduardo Felippe Melchioretto
- Fellow PhD degree, Postgraduate Program in Surgical Clinic, Universidade Federal do Paraná, Curitiba - PR, Brazil. Conception and design, manuscript preparation and writing, critical revision
| | - Marcelo Zeni
- Fellow Master degree, Department of Urology, Medical School, Universidade Federal da Fronteira Sul, Chapecó - SC, Brazil. Design
| | - Djanira Aparecida da Luz Veronez
- PhD, Associate Professor, Department of Anatomy, Medical School, Universidade Federal do Paraná, Curitiba - PR, Brazil. Conception and design
| | - Francisco Filipak Neto
- PhD, Associate Professor, Department of Cellular and Molecular Biology, Medical School, Universidade Federal do Paraná, Curitiba - PR, Brazil. Conception and design
| | - Ingridy de Souza Digner
- Graduate student, Little Prince College, Curitiba - PR, Brazil. Design, manuscript preparation and writing, critical revision
| | - Rogerio de Fraga
- PhD, Associate Professor, Department of Urology, Medical School, Universidade Federal do Paraná, Curitiba - PR, Brazil. Conception and design
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Putti JS, Engers VK, Heemann FM, Salomon TB, Benfato MS, Hackenhaar FS. Effects of lipoic acid and ω-3 long-chain polyunsaturated fatty acids on the kidney in the ovariectomized rat model of menopause. Nutrition 2019; 66:173-179. [PMID: 31310958 DOI: 10.1016/j.nut.2019.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 04/26/2019] [Accepted: 05/21/2019] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The loss of antioxidant protection from estrogen during menopause may lead to oxidative stress in the kidneys. Thus, antioxidant supplementation may potentially decrease the menopause-derived oxidative stress. The aim of this study was to evaluate the effect of α-lipoic acid (LA) and ω-3 long-chain polyunsaturated fatty acids on the redox profile of the kidneys in the ovariectomized rat model of menopause. METHODS We assessed oxidative damage markers and antioxidant defenses in the kidneys of ovariectomized rats supplemented with LA, docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA). Animals received 3 mo of dietary supplementation. RESULTS Ovariectomy did not increase the levels of the damage markers carbonyl and malondialdehyde. EPA supplementation increased carbonyl and malondialdehyde levels. Ovariectomy increased fumarase activity but did not affect the levels of vitamin C, glutathione, and glutathione S-transferase activity. LA, DHA, and EPA supplementation decreased fumarase activity, but increased the levels of vitamin C, glutathione, and glutathione S-transferase activity. Vitamin E, superoxide dismutase, glutathione peroxidase, and peroxide consumption were not affected by ovariectomy or supplementation. CONCLUSIONS The results suggest that ovariectomy did not affect the redox profile in the kidneys. LA, DHA, and EPA supplementation increased certain endogenous antioxidants; however, EPA may have a prooxidant effect on the kidneys.
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Affiliation(s)
- Jordana S Putti
- Department of Biophysics, Postgraduate Program in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Vanessa K Engers
- Department of Biophysics, Postgraduate Program in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernanda M Heemann
- Department of Biophysics, Postgraduate Program in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Tiago B Salomon
- Department of Biophysics, Postgraduate Program in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Mara S Benfato
- Department of Biophysics, Postgraduate Program in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernanda S Hackenhaar
- Department of Biophysics, Postgraduate Program in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
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Schüller ÁK, Mena Canata DA, Hackenhaar FS, Engers VK, Heemann FM, Putti JS, Salomon TB, Benfato MS. Effects of lipoic acid and n-3 long-chain polyunsaturated fatty acid on the liver ovariectomized rat model of menopause. Pharmacol Rep 2017; 70:263-269. [PMID: 29475009 DOI: 10.1016/j.pharep.2017.10.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/26/2017] [Accepted: 10/17/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND Bilateral ovariectomy is an experimental model used to analyse the effects of menopause and develop strategies to mitigate the deleterious effects of this condition. Supplementation of the diet with antioxidants has been used to reduce potential oxidative stress caused by menopause. The purpose of the study was to analyse the effects of α-lipoic acid (LA), docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), dietary supplementation on oxidative stress in the livers of ovariectomized rats. METHODS In this study, we evaluated the effect of dietary supplementation with LA, DHA and EPA for a period of 16 weeks on oestrogen levels and oxidative stress biomarkers in the livers of ovariectomized 25 three-month-old rats. RESULTS Serum oestrogen levels were lower after ovariectomy but were not altered by dietary treatments. LA was capable of acting in the liver, recovering the activity of the antioxidant enzymes superoxide dismutase and glutathione peroxidase, and reducing protein oxidative damage. Moreover, LA supplementation reduced nitrite and nitrate levels. DHA and EPA recovered the antioxidant activity of cytosolic and mitochondrial superoxide dismutase, decreasing protein oxidation. Protection against lipid oxidation differed between treatments. The DHA-treated group showed increased levels of the lipid peroxidation biomarker malondialdehyde compared to the ovariectomized group. However, malondialdehyde levels were not altered by EPA treatment. CONCLUSIONS The results suggest that the antioxidant response varies among evaluated supplementations and all supplements were able to alter enzymatic and non-enzymatic antioxidants in the livers of ovariectomized rats. DHA presented the most evident antioxidant effect, decreasing protein and lipid damage.
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Affiliation(s)
- Ártur Krumberg Schüller
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Diego Antonio Mena Canata
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernanda Schäfer Hackenhaar
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Vanessa Krüger Engers
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernanda Maciel Heemann
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Jordana Salete Putti
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Tiago Boeira Salomon
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Mara Silveira Benfato
- Department of Biophysics, Postgraduate Programme in Cellular and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
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Sexual activity affects the redox profile along the aging process in male rats. Biogerontology 2017; 19:13-21. [DOI: 10.1007/s10522-017-9731-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 09/26/2017] [Indexed: 12/21/2022]
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Heemann FM, da Silva ACA, Salomon TB, Putti JS, Engers VK, Hackenhaar FS, Benfato MS. Redox changes in the brains of reproductive female rats during aging. Exp Gerontol 2016; 87:8-15. [PMID: 27871821 DOI: 10.1016/j.exger.2016.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 11/04/2016] [Accepted: 11/10/2016] [Indexed: 12/30/2022]
Abstract
Reproduction is a critical and demanding phase of an animal's life. In mammals, females usually invest much more in parental care than males, and lactation is the most energetically demanding period of a female's life. Here, we tested whether oxidative stress is a consequence of reproduction in the brains of female Wistar rats. We evaluated the activities of glutathione peroxidase, glutathione S-transferase, and superoxide dismutase; H2O2 consumption; protein carbonylation; NO2 & NO3 levels; and total glutathione, as well as sex hormone levels in brain tissue of animals at 3, 6, 12, and 24months of age. Animals were grouped according to reproductive experience: breeders or non-breeders. Most of the studied parameters showed a difference between non-breeders and breeders at 12 and 24months. At 24months of age, breeders showed higher superoxide dismutase activity, H2O2 consumption, glutathione peroxidase activity, and carbonyl levels than non-breeders. In 12-month-old non-breeders, we observed a higher level of H2O2 consumption and higher superoxide dismutase and glutathione peroxidase activities than breeders. By evaluating the correlation network, we found that there were a larger number of influential nodes and positive links in breeder animals than in non-breeders, indicating a greater number of redox changes in breeder animals. Here, we also demonstrated that the aging process caused higher oxidative damage and higher antioxidant defenses in the brains of breeder female rats at 24months, suggesting that the reproduction process is costly, at least for the female brain. This study shows that there is a strong potential for a link between the cost of reproduction and oxidative stress.
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Affiliation(s)
- Fernanda Maciel Heemann
- Laboratório de Estresse Oxidativo, Departamento de Biofísica, IB, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Ana Carolina Almeida da Silva
- Laboratório de Estresse Oxidativo, Departamento de Biofísica, IB, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Tiago Boeira Salomon
- Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratório de Estresse Oxidativo, Departamento de Biofísica, IB, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Jordana Salete Putti
- Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratório de Estresse Oxidativo, Departamento de Biofísica, IB, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Vanessa Krüger Engers
- Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratório de Estresse Oxidativo, Departamento de Biofísica, IB, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Fernanda Schäfer Hackenhaar
- Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratório de Estresse Oxidativo, Departamento de Biofísica, IB, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Mara Silveira Benfato
- Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratório de Estresse Oxidativo, Departamento de Biofísica, IB, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
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Behling CS, Andrade AS, Putti JS, Mahl CD, Hackenhaar FS, da Silva ACA, e Silva MNC, Salomon TB, dos Santos CEI, Dias JF, Benfato MS. Treatment of oxidative stress in brain of ovariectomized rats with omega-3 and lipoic acid. Mol Nutr Food Res 2015; 59:2547-55. [DOI: 10.1002/mnfr.201500338] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 08/07/2015] [Accepted: 08/12/2015] [Indexed: 01/17/2023]
Affiliation(s)
- Camile S. Behling
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Alexey S. Andrade
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Jordana S. Putti
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Camila D. Mahl
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Fernanda S. Hackenhaar
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Ana Carolina A. da Silva
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Mélany Natuane C. e Silva
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Tiago B. Salomon
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Carla E. I. dos Santos
- Ion Implantation Laboratory; Institute of Physics; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Johnny F. Dias
- Ion Implantation Laboratory; Institute of Physics; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Mara S. Benfato
- Department of Biophysics; Program of Cellular and Molecular Biology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
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Alpha-lipoic acid restores tear production in an animal model of dry eye. Exp Eye Res 2014; 120:1-9. [DOI: 10.1016/j.exer.2013.12.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 10/30/2013] [Accepted: 12/26/2013] [Indexed: 01/19/2023]
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Bal E, Ilgin S, Atli O, Ergun B, Sirmagul B. The effects of gender difference on monocrotaline-induced pulmonary hypertension in rats. Hum Exp Toxicol 2014; 32:766-74. [PMID: 23821593 DOI: 10.1177/0960327113477874] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The present study aimed to compare the effect of gender difference on hemodynamic consequences in the development of monocrotaline (MCT)-induced pulmonary hypertension in rat. The effect of antioxidant enzyme systems on the development of pulmonary hypertension mediated by the phytotoxin MCT and the effect of gender on these antioxidant systems were also investigated. For this purpose, the right ventricular pressures (RVPs) and right ventricular/heart weight (HW) ratios were compared between groups and the glutathione (GSH) level and superoxide dismutase (SOD), catalase (CAT) and glutathione-S-transferase (GST) activities were determined in lung and liver tissue samples of rats. RVP and right ventricular/HW ratios significantly increased in the MCT group compared to the control group. In the MCT group, RVP was significantly higher in males than females. MCT-induced pulmonary hypertension resulted in decreased GSH level, decreased GST and SOD activities and increased CAT activity in lung and liver tissues of both male and female rats. In addition, the lung and liver GSH level and GST and SOD levels were higher in female control rats compared to male control rats. The results of the present study, that antioxidant enzyme activities were different between the groups, highlight the possible role of oxidative stress in the pathogenesis of MCT-induced pulmonary hypertension in rats. Moreover, the lower antioxidant defense capacity of male rats than female rats may be considered as a cause of more aggressive course of MCT-induced pulmonary hypertension in males compared to females.
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Affiliation(s)
- E Bal
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Anadolu University, Eskisehir, Turkey
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Salomon TB, Hackenhaar FS, Almeida AC, Schüller AK, Gil Alabarse PV, Ehrenbrink G, Benfato MS. Oxidative stress in testis of animals during aging with and without reproductive activity. Exp Gerontol 2013; 48:940-6. [PMID: 23834967 DOI: 10.1016/j.exger.2013.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 06/11/2013] [Accepted: 06/28/2013] [Indexed: 01/08/2023]
Abstract
The free radical theory of aging postulates that an imbalance between reactive oxygen species (ROS) and reactive nitrogen species (RNS) and antioxidant defenses is important in senescence. To address this issue and gain insight into the aging process, we have evaluated the antioxidant defenses and have assessed oxidative damage in testis tissues in aging male rats. In order to relate aging and reproduction, animals with and without reproductive activity were studied. In reproductive animals the results showed a progressive increase in antioxidant enzyme activity until 12 months of age followed by an abrupt fall at 24 months. In non-reproductive animals, antioxidant activity was stable through 12 months of age, but again, fell abruptly at 24 months of age. In addition, increased aconitase activity and increased testosterone levels were found among reproductively active animals. The data demonstrate the existence of metabolic differences in testis of reproductively experienced animals and reproductively naïve animals.
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Affiliation(s)
- Tiago Boeira Salomon
- Laboratório de Estresse Oxidativo, Departamento de Biofísica-IB-UFRGS, Av. Bento Gonçalves, Porto Alegre, Rio Grande do Sul State, Brazil
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da Silva ACA, Salomon TB, Behling CS, Putti J, Hackenhaar FS, Alabarse PVG, Schüller AK, Benfato MS. Oxidative stress in the kidney of reproductive female rats during aging. Biogerontology 2013; 14:411-22. [DOI: 10.1007/s10522-013-9440-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 06/17/2013] [Indexed: 02/03/2023]
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Phelps DS, Umstead TM, Floros J. Sex differences in the response of the alveolar macrophage proteome to treatment with exogenous surfactant protein-A. Proteome Sci 2012; 10:44. [PMID: 22824420 PMCID: PMC3570446 DOI: 10.1186/1477-5956-10-44] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Accepted: 06/29/2012] [Indexed: 01/12/2023] Open
Abstract
Background Male wild type (WT) C57BL/6 mice are less capable of clearing bacteria and surviving from bacterial pneumonia than females. However, if an oxidative stress (acute ozone exposure) occurs before infection, the advantage shifts to males who then survive at higher rates than females. We have previously demonstrated that survival in surfactant protein-A (SP-A) knockout (KO) mice compared to WT was significantly reduced. Because the alveolar macrophage (AM) is pivotal in host defense we hypothesized that SP-A and circulating sex hormones are responsible for these sex differences. We used 2D-DIGE to examine the relationship of sex and SP-A on the AM proteome. The role of SP-A was investigated by treating SP-A KO mice with exogenous SP-A for 6 and 18 hr and studying its effects on the AM proteome. Results We found: 1) less variance between KO males and females than between the WT counterparts by principal component analysis, indicating that SP-A plays a role in sex differences; 2) fewer changes in females when the total numbers of significantly changing protein spots or identified whole proteins in WT or 18 hr SP-A-treated males or females were compared to their respective KO groups; 3) more proteins with functions related to chaperones or protease balance and Nrf2-regulated proteins changed in response to SP-A in females than in males; and 4) the overall pattern of SP-A induced changes in actin-related proteins were similar in both sexes, although males had more significant changes. Conclusions Although there seems to be an interaction between sex and the effect of SP-A, it is unclear what the responsible mechanisms are. However, we found that several of the proteins that were expressed at significantly higher levels in females than in males in WT and/or in KO mice are known to interact with the estrogen receptor and may thus play a role in the SP-A/sex interaction. These include major vault protein, chaperonin subunit 2 (beta) (CCT2), and Rho GDP alpha dissociation inhibitor. We conclude that sex differences exist in the proteome of AM derived from male and female mice and that SP-A contributes to these sex differences.
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Affiliation(s)
- David S Phelps
- Center for Host defense, Inflammation, and Lung Disease(CHILD) Research and Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
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Tondreau MY, Boucher E, Simard M, Tremblay Y, Bilodeau JF. Sex-specific perinatal expression of glutathione peroxidases during mouse lung development. Mol Cell Endocrinol 2012; 355:87-95. [PMID: 22326323 DOI: 10.1016/j.mce.2012.01.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Accepted: 01/25/2012] [Indexed: 02/07/2023]
Abstract
Reports indicate that antioxidant enzymes like the glutathione peroxidases (GPx) can be regulated by sex steroids. The GPx, a major class of antioxidants involved in H(2)O(2) and lipid hydroperoxides neutralization, showed an age- and sex-specific expression in many adult organs including the lung. High levels of androgens in the male lung are known to delay the surge of surfactant synthesis during gestation in several species. However, the impact of male androgens on antioxidant GPx early in life remains to be determined. The objective was to study the lung sex-specific expression of GPx during BALB/c mouse perinatal development. The mRNA expression of four seleno-dependent Gpx (Gpx1 to 4) in the lung of both sexes was characterized by real-time PCR from gestational day 15 to postnatal day 30, covering the entire canalicular, saccular and alveolar stages. Immunohistochemistry of GPx-1, -3 and -4, and seleno-dependent GPx enzymatic assays were also performed in the lung. We found a transient lower Gpx1 mRNA level in male than in female lungs during the first 5 days after birth, corresponding to the saccular phase. This dimorphic expression was concomitant to a sex difference in GPx enzymatic activity corrected for blood. It is, to our knowledge, the first report of a sex dimorphism for murine lung enzymatic antioxidant defenses during the perinatal period.
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Affiliation(s)
- Maxime Y Tondreau
- Axe reproduction, santé périnatale et santé de l'enfant, Centre de Recherche en Biologie de la Reproduction, Centre de Recherche du Centre Hospitalier de l'Université Laval, Québec, Canada
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Alabarse PV, Salomon TB, Medeiros TM, Hackenhaar FS, Schüller AK, Ehrenbrink G, Benfato MS. Oxidative stress in the kidney of reproductive male rats during aging. Exp Gerontol 2011; 46:773-80. [DOI: 10.1016/j.exger.2011.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Revised: 04/06/2011] [Accepted: 05/12/2011] [Indexed: 01/05/2023]
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Alabarse PVG, Hackenhaar FS, Medeiros TM, Mendes MFA, Viacava PR, Schüller ÁK, Salomon TB, Ehrenbrink G, Benfato MS. Oxidative stress in the brain of reproductive male rats during aging. Exp Gerontol 2011; 46:241-8. [DOI: 10.1016/j.exger.2010.10.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Revised: 08/26/2010] [Accepted: 10/13/2010] [Indexed: 12/31/2022]
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