1
|
Ahmed S, Sullivan JC, Layton AT. Impact of sex and pathophysiology on optimal drug choice in hypertensive rats: quantitative insights for precision medicine. iScience 2021; 24:102341. [PMID: 33870137 PMCID: PMC8047168 DOI: 10.1016/j.isci.2021.102341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 02/22/2021] [Accepted: 03/17/2021] [Indexed: 12/12/2022] Open
Abstract
Less than half of all hypertensive patients receiving treatment are successful in normalizing their blood pressure. Despite the complexity and heterogeneity of hypertension, the current antihypertensive guidelines are not tailored to the individual patient. As a step toward individualized treatment, we develop a quantitative systems pharmacology model of blood pressure regulation in the spontaneously hypertensive rat (SHR) and generate sex-specific virtual populations of SHRs to account for the heterogeneity between the sexes and within the pathophysiology of hypertension. We then used the mechanistic model integrated with machine learning tools to study how variability in these mechanisms leads to differential responses in rodents to the four primary classes of antihypertensive drugs. We found that both the sex and the pathophysiological profile of the individual play a major role in the response to hypertensive treatments. These results provide insight into potential areas to apply precision medicine in human primary hypertension.
Collapse
Affiliation(s)
- Sameed Ahmed
- Department of Applied Mathematics, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Jennifer C Sullivan
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Anita T Layton
- Department of Applied Mathematics, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.,Department of Biology, Cheriton School of Computer Science, and School of Pharmacology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| |
Collapse
|
2
|
Magalhães SC, de Oliveira KA, Freiras PA, Moreira Gomes MD, Pereira LM, Boa LF, de Carvalho DP, Fortunato RS, Carneiro Loureiro AC, Brito LC, de Oliveira AC. High-dose Nandrolone Decanoate induces oxidative stress and inflammation in retroperitoneal adipose tissue of male rats. J Steroid Biochem Mol Biol 2020; 203:105728. [PMID: 32712213 DOI: 10.1016/j.jsbmb.2020.105728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/06/2020] [Accepted: 07/13/2020] [Indexed: 02/07/2023]
Abstract
The non-therapeutic use of the androgenic anabolic steroid Nandrolone Decanoate is popular due to its effects on physical performance and body composition, especially for its lipolytic and anabolic effects associated. However, high doses of such drugs are often associated with a series of pathologies related to unbalanced redox homeostasis, which, in turn, can be linked to inflammation. The oxidative stress onset could deregulate the secretion of cytokines, evidencing a dysfunctional adipocyte. Thus, the aim of this study was to investigate the effect of supraphysiological doses of Nandrolone Decanoate on redox homeostasis of retroperitoneal fatpad of male rats and its relationship with cytokines-based inflammatory signaling. Hydrogen peroxide production was assessed in the retroperitoneal fat pad of adult male rats which received either 10 mg kg of Nandrolone Decanoate or only a vehicle. Also, catalase, superoxide dismutase and glutathione peroxidase activities were measured, together with total reduced thiols and protein carbonylation, as well as IL-1β, TNF-α, and IL-6 local levels. High doses of Nandrolone Decanoate caused an increase in the hydrogen peroxide production, together with lower activities of the antioxidant enzymes and lower levels of total reduced thiol. There were also higher protein carbonylation and greater levels of IL-1β, TNF-α, and IL-6 in the treated group compared to control group. Therefore, it was possible to verify that high doses of Nandrolone Decanoate cause oxidative stress and induce higher inflammatory signaling in retroperitoneal fat pad of male rats.
Collapse
Affiliation(s)
- Saulo Chaves Magalhães
- Laboratório de Fisiologia Endócrina e Metabolismo, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil
| | - Keciany Alves de Oliveira
- Laboratório de Fisiologia Endócrina e Metabolismo, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil
| | - Paula Alexandre Freiras
- Laboratório de Fisiologia Endócrina e Metabolismo, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil
| | - Maria Diana Moreira Gomes
- Laboratório de Eletrofisiologia, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil
| | - Leonardo Matta Pereira
- Laboratório de Eletrofisiologia, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil
| | - Luiz Fonte Boa
- Laboratório de Eletrofisiologia, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil
| | - Denise Pires de Carvalho
- Laboratório de Fisiologia Endócrina Dóris Rosenthal, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rodrigo Soares Fortunato
- Laboratório de Fisiologia e Sinalização Redox, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adriano Cesar Carneiro Loureiro
- Laboratório de Bioquímica e Expressão Gênica, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil
| | - Luciana Catunda Brito
- Instututo de Educação Física e Esportes, Universidade Federal do Ceará, Ceará, Brazil
| | - Ariclécio Cunha de Oliveira
- Laboratório de Fisiologia Endócrina e Metabolismo, Instituto Superior de Ciências Biomédicas, Universidade Estadual do Ceará, Ceará, Brazil.
| |
Collapse
|
3
|
Nandrolone alter left ventricular contractility and promotes remodelling involving calcium-handling proteins and renin-angiotensin system in male SHR. Life Sci 2018; 208:239-245. [PMID: 30040952 DOI: 10.1016/j.lfs.2018.07.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/12/2018] [Accepted: 07/20/2018] [Indexed: 11/24/2022]
Abstract
AIMS Hypertension is a highly prevalent disease that has been correlated to severe organ damage and mortality. However, the role of androgens in hypertension is controversial. The aim of this study was to evaluate the cardiac effects of the nandrolone decanoate (NDL) in male SHR. MAIN METHODS At 12 weeks of age, male SHR rats were separated into three groups: Control (CON), Nandrolone 10 mg/kg twice weekly (NDL), and NDL plus Enalapril 10 mg/kg/day (NDL-E) groups. The animals were treated for 4 weeks. Haemodynamic parameters were acquired through ventricular catheter implantation. The left ventricle was stained with haematoxylin/eosin or picrosirius red. Western blot analysis of TNF-α, ACE, AT1R, β1-AR, PLB, p-PLBser16 and SERCA2a was performed. KEY FINDINGS Nandrolone increased hypertension in SHR rats and enalapril reduced blood pressure to values below those of the control. NDL increased +dP/dtmax, -dP/dtmax and cardiac hypertrophy, which were prevented in the NDL-E group. Cardiac collagen deposition was increased in the NDL group, with this effect being attenuated by enalapril in NDL-E animals. TNF-α, ACE, AT1R and β1-AR proteins were increased in the NDL, and enalapril decreased them, except for TNF-α. The ratio p-PLBser16/PLB revealed an increase after nandrolone, which was prevented in the NDL-E group. The SERCA2a expression protein and SERCA2a/PLB were increased in NDL animals, which did not occur in the NDL-E group. SIGNIFICANCE Nandrolone has distinct effects on cardiac function and remodelling in male SHR, altering the hypertension development process in the heart through modulation of calcium handling proteins and the renin-angiotensin system.
Collapse
|
4
|
The selective estrogen receptor modulators (SERMs) raloxifene and tamoxifen improve ANP levels and decrease nuclear translocation of NF-kB in estrogen-deficient rats. Pharmacol Rep 2017; 69:798-805. [PMID: 28591668 DOI: 10.1016/j.pharep.2017.03.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/27/2017] [Accepted: 03/09/2017] [Indexed: 11/21/2022]
Abstract
BACKGROUND The selective estrogen receptor modulators (SERMs) raloxifene and tamoxifen are used for the treatment of osteoporosis and cancer, respectively, in women. The impairment of both the Atrial Natriuretic Peptide (ANP) cell signaling system and the translocation of nuclear factor-kappa B (NF-kB) to the cell nucleus are associated with detrimental cardiovascular effects and inflammation. The effects of SERMs on these parameters in the cardiac tissue of estrogen-deficient rats has not been reported. METHODS We investigated the effects of raloxifene and tamoxifen on ANP signaling, p65 NF-kB nuclear translocation, cardiac histology and contractility. Female rats were divided into five groups: control (SHAM), ovariectomized (OVX), OVX-treated 17-β-estradiol (E), OVX-treated raloxifene (RLX) and OVX-treated tamoxifen (TAM). The treatments started 21days after ovariectomy and continued for 14days. RESULTS Ovariectomy reduced ANP mRNA in the left atrium (LA), decreased the content of ANP protein in the LA and in plasma, and increased the level of p65 NF-kB nuclear translocation in the left ventricle. Both 17-β-estradiol and SERMs were able to reverse these alterations, which were induced by the estrogen deficient state. The hemodynamic and cardiac structural parameters analyzed in the present work were not modified by the interventions. CONCLUSIONS Our study demonstrates, for the first time, the additional benefits of raloxifene and tamoxifen in an estrogen-deficient state. These include the normalization of plasmatic and cardiac ANP levels and cardiac p65 NF-kB translocation. Therefore, these treatments promote cardiovascular protection and may contribute to the prevention of cardiac dysfunction observed long-term in postmenopausal women.
Collapse
|
5
|
Heringer OA, Cassaro KODS, Barbosa NCMR, Brasil GA, do Nascimento AM, de Lima EM, Bissoli NS, Lenz D, Endringer DC, de Andrade TU. Relationship between male hormonal status, Bezold–Jarisch reflex function, and ACE activity (cardiac and plasmatic). Can J Physiol Pharmacol 2016; 94:231-236. [DOI: 10.1139/cjpp-2015-0144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The negative relationship between androgens and the Bezold–Jarisch reflex (BJR) has been demonstrated, but no studies evaluated the physiological influence of testosterone on this reflex. We evaluated the influence of male rat castration on the BJR, cardiac morphometric parameters, and the plasmatic and the cardiac angiotensin converting enzyme (ACE) activity. After castration (CAS), the rats were divided into 24 and 72 h (CAS24H, CAS72H), and 7 and 21 days (CAS7D, CAS21D) groups. The BJR was studied by administering increasing doses of phenylbiguanide (PBG; 1.5–24 μg/kg) at different times after castration. Castration results in the following: (i) reduction in testosterone levels (SHAM: 238.7 ± 15.1; CAS24H: 9.0 ± 0.5; CAS72H: 6.7 ± 0.4; CAS7D: 5.2 ± 0.2; and CAS21D: 2.2 ± 0.3 ng/dL; p < 0.05); (ii) no changes in 17β-estradiol; (iii) a reduced BJR sensitivity (PBG 6 μg/kg; SHAM: 77 ± 7; CAS24H: 63 ± 10; CAS72H: 55 ± 6; CAS7D: 54 ± 4; and CAS21D: 35 ± 2%; p < 0.01); (iv) a decrease in cardiac (SHAM: 107 ± 6; CAS24H: 92 ± 2; CAS72H: 82 ± 3; CAS7D: 54 ± 3; and CAS21D: 43 ± 4%; p < 0.05) and plasmatic (SHAM: 135 ± 8; CAS24H: 102 ± 5; CAS72H: 99 ± 3; CAS7D: 89 ± 4; and CAS21D: 56 ± 6%; p < 0.05) ACE activity. No changes were observed in cardiac morphometry and hemodynamic parameters. Therefore, castration leads to decrease in testosterone levels as early as 24 h, reduction in ACE activity and loss of BJR sensitivity 7 days after castration. The loss of BJR sensitivity was not related to cardiac morphometric changes and cardiovascular hemodynamics.
Collapse
Affiliation(s)
- Otávio Arruda Heringer
- Department of Pharmaceutical Sciences, University Vila Velha, Av. Comissário José Dantas de Melo, no. 21, Boa Vista Vila Velha, Espírito Santo CEP 29102-920, Brazil
| | - Karla Oliveira dos Santos Cassaro
- Department of Pharmaceutical Sciences, University Vila Velha, Av. Comissário José Dantas de Melo, no. 21, Boa Vista Vila Velha, Espírito Santo CEP 29102-920, Brazil
| | - Nara Carolina Mateus Rabello Barbosa
- Department of Pharmaceutical Sciences, University Vila Velha, Av. Comissário José Dantas de Melo, no. 21, Boa Vista Vila Velha, Espírito Santo CEP 29102-920, Brazil
| | - Girlandia Alexandre Brasil
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - Andrews Marques do Nascimento
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - Ewelyne Miranda de Lima
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - Nazaré Souza Bissoli
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - Dominik Lenz
- Department of Pharmaceutical Sciences, University Vila Velha, Av. Comissário José Dantas de Melo, no. 21, Boa Vista Vila Velha, Espírito Santo CEP 29102-920, Brazil
| | - Denise Coutinho Endringer
- Department of Pharmaceutical Sciences, University Vila Velha, Av. Comissário José Dantas de Melo, no. 21, Boa Vista Vila Velha, Espírito Santo CEP 29102-920, Brazil
| | - Tadeu Uggere de Andrade
- Department of Pharmaceutical Sciences, University Vila Velha, Av. Comissário José Dantas de Melo, no. 21, Boa Vista Vila Velha, Espírito Santo CEP 29102-920, Brazil
| |
Collapse
|
6
|
Lima EM, Nascimento AM, Brasil GA, Kalil IC, Lenz D, Endringer DC, Andrade TU, Bissoli NS. Cardiopulmonary reflex, cardiac cytokines, and nandrolone decanoate: response to resistance training in rats. Can J Physiol Pharmacol 2015; 93:985-91. [DOI: 10.1139/cjpp-2015-0014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study evaluated the effects of nandrolone associated with resistance training (RT) on cardiac cytokines, angiotensin-converting enzyme activity (ACEA), and the sensitivity of the Bezold-Jarisch reflex (BJR). Male Wistar rats were divided into 3 groups: CONT (received vehicle, no training); EXERC (RT: after one week of water adaptation, rats were exercised by jumping into water twice a week for 4 weeks), and ND+EXERC (received nandrolone decanoate 10 mg/kg, twice/week, i.m, associated with RT). The BJR was analysed by measuring bradycardic and hypotensive responses elicited by serotonin administration. Myocyte hypertrophy and matrix collagen deposition were determined by morphometric analysis of H&E and picrosirius red-stained samples, respectively. TNF-α and ACEA were also studied. RT promoted physiological myocyte hyrpertrophy but did not cause changes in the other parameters. The association of ND with RT increased myocyte hypertrophy, deposition of matrix type I collagen, TNF-α and ACEA; decreased IL-10, and impairment in the BJR were observed in ND+EXERC compared with CONT and EXERC. ND is associated with alterations in cardiac structure and function as a result of the development of pathological cardiac hypertrophy (cardiac cytokine imbalance, elevation of ACEA) and cardiac injury, even when combined with resistance training.
Collapse
Affiliation(s)
| | - Andrews Marques Nascimento
- Department of Pharmacy, University of Vila Velha, Espírito Santo, Brazil
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Av. Marechal Campos, 1468, Vitória, Espírito Santo 29042-755, Brazil
| | - Girlandia Alexandre Brasil
- Department of Pharmacy, University of Vila Velha, Espírito Santo, Brazil
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Av. Marechal Campos, 1468, Vitória, Espírito Santo 29042-755, Brazil
| | | | - Dominik Lenz
- Department of Pharmacy, University of Vila Velha, Espírito Santo, Brazil
| | | | | | - Nazaré Souza Bissoli
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Av. Marechal Campos, 1468, Vitória, Espírito Santo 29042-755, Brazil
| |
Collapse
|
7
|
Dalpiaz PLM, Lamas AZ, Caliman IF, Ribeiro RF, Abreu GR, Moyses MR, Andrade TU, Gouvea SA, Alves MF, Carmona AK, Bissoli NS. Sex Hormones Promote Opposite Effects on ACE and ACE2 Activity, Hypertrophy and Cardiac Contractility in Spontaneously Hypertensive Rats. PLoS One 2015; 10:e0127515. [PMID: 26010093 PMCID: PMC4444272 DOI: 10.1371/journal.pone.0127515] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 04/16/2015] [Indexed: 11/25/2022] Open
Abstract
Background There is growing interest in sex differences and RAS components. However, whether gender influences cardiac angiotensin I-converting enzyme (ACE) and angiotensin-converting enzyme 2 (ACE2) activity is still unknown. In the present work, we determined the relationship between ACE and ACE2 activity, left ventricular function and gender in spontaneously hypertensive rats (SHRs). Methodology / Principal Findings Twelve-week-old female (F) and male (M) SHRs were divided into 2 experimental groups (n = 7 in each group): sham (S) and gonadectomized (G). Fifty days after gonadectomy, we measured positive and negative first derivatives (dP/dt maximum left ventricle (LV) and dP/dt minimum LV, respectively), hypertrophy (morphometric analysis) and ACE and ACE2 catalytic activity (fluorimetrically). Expression of calcium handling proteins was measured by western blot. Male rats exhibited higher cardiac ACE and ACE2 activity as well as hypertrophy compared to female rats. Orchiectomy decreased the activity of these enzymes and hypertrophy, while ovariectomy increased hypertrophy and ACE2, but did not change ACE activity. For cardiac function, the male sham group had a lower +dP/dt than the female sham group. After gonadectomy, the +dP/dt increased in males and reduced in females. The male sham group had a lower -dP/dt than the female group. After gonadectomy, the -dP/dt increased in the male and decreased in the female groups when compared to the sham group. No difference was observed among the groups in SERCA2a protein expression. Gonadectomy increased protein expression of PLB (phospholamban) and the PLB to SERCA2a ratio in female rats, but did not change in male rats. Conclusion Ovariectomy leads to increased cardiac hypertrophy, ACE2 activity, PLB expression and PLB to SERCA2a ratio, and worsening of hemodynamic variables, whereas in males the removal of testosterone has the opposite effects on RAS components.
Collapse
Affiliation(s)
- P. L. M. Dalpiaz
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
- * E-mail:
| | - A. Z. Lamas
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - I. F. Caliman
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - R. F. Ribeiro
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - G. R. Abreu
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - M. R. Moyses
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - T. U. Andrade
- Department of Pharmacy, University Vila Velha, Vila Velha, Espirito Santo, Brazil
| | - S. A. Gouvea
- Nucleus of Biotechnology, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - M. F. Alves
- Department of Biophysics, Escola Paulista de Medicina, Federal University of São Paulo, São Paulo, Brazil
| | - A. K. Carmona
- Department of Biophysics, Escola Paulista de Medicina, Federal University of São Paulo, São Paulo, Brazil
| | - N. S. Bissoli
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| |
Collapse
|
8
|
Lamas AZ, Caliman IF, Dalpiaz PLM, de Melo AF, Abreu GR, Lemos EM, Gouvea SA, Bissoli NS. Comparative effects of estrogen, raloxifene and tamoxifen on endothelial dysfunction, inflammatory markers and oxidative stress in ovariectomized rats. Life Sci 2015; 124:101-9. [PMID: 25623855 DOI: 10.1016/j.lfs.2015.01.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 12/15/2014] [Accepted: 01/08/2015] [Indexed: 12/24/2022]
Abstract
AIM Endothelial dysfunction is considered a premature indication of atherosclerosis and vessel damage and is present in the postmenopausal period. This study compares the influence of estrogen, raloxifene and tamoxifen on factors that affect endothelial function in ovariectomized (OVX) rats. MAIN METHODS The rats were divided into: SHAM; OVX; OVX+estrogen (0.5 μg/kg/day); OVX+raloxifene (2 mg/kg/day) and OVX+tamoxifen (1 mg/kg/day) groups. The acetylcholine vasorelaxation response was evaluated in the mesenteric vascular bed. The vascular oxidative stress and serum inflammatory cytokine levels were monitored, and analyses of eNOS and iNOS were performed. KEY FINDINGS The acetylcholine-induced responses obtained in the OVX were lower than those obtained in the SHAM, and all treatments restored this response. l-NAME reduced and equalized the acetylcholine-induced response in all groups. The attenuation of the acetylcholine-induced responses by aminoguanidine was greater in the OVX. Endothelial dysfunction in OVX was associated with oxidative stress and an increase in iNOS and decrease in eNOS expression. Except for the production of reactive oxidative species (ROS) in the OVX+tamoxifen, treatments improved the nitric oxide component of the relaxation response and normalized both the oxidative stress and the expression of those signaling pathway enzymes. Serum levels of TNF-α and IL-6 were increased in OVX, and treatments normalized these levels. SIGNIFICANCE Raloxifene and tamoxifen have similar anti-inflammatory effects that may be important in improving vascular dysfunction. Tamoxifen did not affect the ROS but improved endothelial dysfunction. The protective effect on endothelial function by these treatments provides evidence of their potential cardiovascular benefits in the postmenopausal period.
Collapse
Affiliation(s)
- Aline Zandonadi Lamas
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Izabela Facco Caliman
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Polyana Lima Meireles Dalpiaz
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Antônio Ferreira de Melo
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Glaucia Rodrigues Abreu
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Elenice Moreira Lemos
- Nucleus of Infectious Diseases, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Sonia Alves Gouvea
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Nazaré Souza Bissoli
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil.
| |
Collapse
|
9
|
Li HB, Qin DN, Ma L, Miao YW, Zhang DM, Lu Y, Song XA, Zhu GQ, Kang YM. Chronic infusion of lisinopril into hypothalamic paraventricular nucleus modulates cytokines and attenuates oxidative stress in rostral ventrolateral medulla in hypertension. Toxicol Appl Pharmacol 2014; 279:141-9. [PMID: 24937322 DOI: 10.1016/j.taap.2014.06.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 05/07/2014] [Accepted: 06/06/2014] [Indexed: 02/05/2023]
Abstract
The hypothalamic paraventricular nucleus (PVN) and rostral ventrolateral medulla (RVLM) play a critical role in the generation and maintenance of sympathetic nerve activity. The renin-angiotensin system (RAS) in the brain is involved in the pathogenesis of hypertension. This study was designed to determine whether inhibition of the angiotensin-converting enzyme (ACE) in the PVN modulates cytokines and attenuates oxidative stress (ROS) in the RVLM, and decreases the blood pressure and sympathetic activity in renovascular hypertensive rats. Renovascular hypertension was induced in male Sprague-Dawley rats by the two-kidney one-clip (2K1C) method. Renovascular hypertensive rats received bilateral PVN infusion with ACE inhibitor lisinopril (LSP, 10μg/h) or vehicle via osmotic minipump for 4weeks. Mean arterial pressure (MAP), renal sympathetic nerve activity (RSNA), and plasma proinflammatory cytokines (PICs) were significantly increased in renovascular hypertensive rats. The renovascular hypertensive rats also had higher levels of ACE in the PVN, and lower level of interleukin-10 (IL-10) in the RVLM. In addition, the levels of PICs, the chemokine MCP-1, the subunit of NAD(P)H oxidase (gp91(phox)) and ROS in the RVLM were increased in hypertensive rats. PVN treatment with LSP attenuated those changes occurring in renovascular hypertensive rats. Our findings suggest that the beneficial effects of ACE inhibition in the PVN in renovascular hypertension are partly due to modulation cytokines and attenuation oxidative stress in the RVLM.
Collapse
Affiliation(s)
- Hong-Bao Li
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Cardiovascular Research Center, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China
| | - Da-Nian Qin
- Department of Physiology, Shantou University Medical College, Shantou 515041, China.
| | - Le Ma
- Department of Public Health, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China
| | - Yu-Wang Miao
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Cardiovascular Research Center, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China
| | - Dong-Mei Zhang
- Department of Physiology, Dalian Medical University, Dalian 116044, China
| | - Yan Lu
- Department of Clinical Laboratory, Sanaitang Hospital, Lanzhou 730030, China
| | - Xin-Ai Song
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Cardiovascular Research Center, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China
| | - Guo-Qing Zhu
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Department of Physiology, Nanjing Medical University, Nanjing 210029, China
| | - Yu-Ming Kang
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Cardiovascular Research Center, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China.
| |
Collapse
|
10
|
Tipton AJ, Sullivan JC. Sex differences in T cells in hypertension. Clin Ther 2014; 36:1882-1900. [PMID: 25134971 DOI: 10.1016/j.clinthera.2014.07.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 07/22/2014] [Indexed: 12/24/2022]
Abstract
PURPOSE Hypertension is a major risk factor for cardiovascular disease, stroke, and end-organ damage. There is a sex difference in blood pressure (BP) that begins in adolescence and continues into adulthood, in which men have a higher prevalence of hypertension compared with women until the sixth decade of life. Less than 50% of hypertensive adults in the United States manage to control their BP to recommended levels using current therapeutic options, and women are more likely than are men to have uncontrolled high BP. This, is despite the facts that more women compared with men are aware that they have hypertension and that women are more likely to seek treatment for the disease. Novel therapeutic targets need to be identified in both sexes to increase the percentage of hypertensive individuals with controlled BP. The purpose of this article was to review the available literature on the role of T cells in BP control in both sexes, and the potential therapeutic application/implications of targeting immune cells in hypertension. METHODS A search of PubMed was conducted to determine the impact of sex on T cell-mediated control of BP. The search terms included sex, gender, estrogen, testosterone, inflammation, T cells, T regulatory cells, Th17 cells, hypertension, and blood pressure. Additional data were included from our laboratory examinations of cytokine expression in the kidneys of male and female spontaneously hypertensive rats (SHRs) and differential gene expression in both the renal cortex and mesenteric arterial bed of male and female SHRs. FINDINGS There is a growing scientific literature base regarding the role of T cells in the pathogenesis of hypertension and BP control; however, the majority of these studies have been performed exclusively in males, despite the fact that both men and women develop hypertension. There is increasing evidence that although T cells also mediate BP in females, there are distinct differences in both the T-cell profile and the functional impact of sex differences in T cells on cardiovascular health, although more work is needed to better define the relative impact of different T-cell subtypes on BP in both sexes. IMPLICATIONS The challenge now is to fully understand the molecular mechanisms by which the immune system regulates BP and how the different components of the immune system interact so that specific mechanisms can be targeted therapeutically without compromising natural immune defenses.
Collapse
Affiliation(s)
- Ashlee J Tipton
- Department of Physiology, Georgia Regents University, Augusta, Georgia
| | | |
Collapse
|
11
|
Tipton AJ, Baban B, Sullivan JC. Female spontaneously hypertensive rats have a compensatory increase in renal regulatory T cells in response to elevations in blood pressure. Hypertension 2014; 64:557-64. [PMID: 24914200 DOI: 10.1161/hypertensionaha.114.03512] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Female spontaneously hypertensive rats (SHR) have more regulatory T cells (Tregs) in their kidneys than males. The goal of this study was to determine the impact of blood pressure (BP) on the renal immune profile. We hypothesize that increases in BP promote a proinflammatory renal T cell and cytokine profile in SHR, although females will have greater hormone-dependent increases in Tregs and males will have greater increases in Th17 cells. Renal T cell and cytokine profiles were assessed in male and female Wistar-Kyoto rats and male and female SHR treated with vehicle or hydrochlorothiazide and reserpine (HCTZ) from 6 to 12 (6-HCTZ) or 11 to 13 weeks of age (2-HCTZ). Regardless of sex, SHR had a more proinflammatory renal immune profile than Wistar-Kyoto rats. 6-HCTZ attenuated age-related increases in BP and 2-HCTZ reversed hypertension compared with vehicle-treated SHR. Neither 6-HCTZ nor 2-HCTZ altered CD3(+), CD4(+), or CD8(+) T cells in either sex. Both treatments decreased Tregs only in female SHR abolishing sex differences in Tregs. 6-HCTZ has no impact on Th17 cells in either sex and 2-HCTZ had a minimal impact on renal Th17 cells. To further assess mechanisms mediating sex differences in the renal immune profile, male and female SHR were gonadectomized to determine the impact of sex hormones. Gonadectomy increased proinflammatory markers in both sexes, suggesting that both male and female sex hormones are anti-inflammatory. In conclusion, BP contributes to sex differences in the renal T-cell profile of SHR; female SHR increase renal Tregs in response to increases in BP.
Collapse
Affiliation(s)
- Ashlee J Tipton
- From the Department of Physiology (A.J.T., J.C.S.) and Department of Oral Biology (B.B.), Georgia Regents University, Augusta
| | - Babak Baban
- From the Department of Physiology (A.J.T., J.C.S.) and Department of Oral Biology (B.B.), Georgia Regents University, Augusta
| | - Jennifer C Sullivan
- From the Department of Physiology (A.J.T., J.C.S.) and Department of Oral Biology (B.B.), Georgia Regents University, Augusta.
| |
Collapse
|
12
|
Metformin ameliorates ovariectomy-induced vascular dysfunction in non-diabetic Wistar rats. Clin Sci (Lond) 2014; 127:265-75. [DOI: 10.1042/cs20130553] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The pathophysiological changes observed in the mesenteric beds of ovariectomized rats were ameliorated by metformin. If this translates to humans, metformin could have additional benefits for post-menopausal women treated with this drug for glycaemic control.
Collapse
|
13
|
Caliman IF, Lamas AZ, Dalpiaz PLM, Medeiros ARS, Abreu GR, Gomes Figueiredo S, Nascimento Gusmão L, Uggere Andrade T, Souza Bissoli N. Endothelial relaxation mechanisms and oxidative stress are restored by atorvastatin therapy in ovariectomized rats. PLoS One 2013; 8:e80892. [PMID: 24278341 PMCID: PMC3836761 DOI: 10.1371/journal.pone.0080892] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 10/07/2013] [Indexed: 12/24/2022] Open
Abstract
The studies on hormone replacement therapy (HRT) in females with estrogen deficiency are not conclusive. Thus, non-estrogen therapies, such as atorvastatin (ATO), could be new strategies to substitute or complement HRT. This study evaluated the effects of ATO on mesenteric vascular bed (MVB) function from ovariectomized (OVX) female rats. Female rats were divided into control SHAM, OVX, and OVX treated with 17β-estradiol (EST) or ATO groups. The MVB reactivity was determined in organ chambers, vascular oxidative stress by dihydroethidine staining, and the expression of target proteins by western blot. The reduction in acetylcholine-induced relaxation in OVX rats was restored by ATO or EST treatment. The endothelium-dependent nitric oxide (NO) component was reduced in OVX rats, whereas the endothelium-derived hyperpolarizing factor (EDHF) component or prostanoids were not altered in the MVBs. Endothelial dysfunction in OVX rats was associated with oxidative stress, an up-regulation of iNOS and NADPH oxidase expression and a down-regulation of eNOS expression. Treatment with ATO or EST improved the NO component of the relaxation and normalized oxidative stress and the expression of those signaling pathways enzymes. Thus, the protective effect of ATO on endothelial dysfunction caused by estrogen deficiency highlights a significant therapeutic benefit for statins independent of its effects on cholesterol, thus providing evidence that non-estrogen therapy could be used for cardiovascular benefit in an estrogen-deficient state, such as menopause.
Collapse
Affiliation(s)
- Izabela Facco Caliman
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - Aline Zandonadi Lamas
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | | | | | - Glaucia Rodrigues Abreu
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - Suely Gomes Figueiredo
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - Lara Nascimento Gusmão
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
| | - Tadeu Uggere Andrade
- Department of Pharmacy, University Center of Vila Velha, Vila Velha, Espirito Santo, Brazil
| | - Nazaré Souza Bissoli
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Espirito Santo, Brazil
- * E-mail:
| |
Collapse
|
14
|
Should there be sex-specific criteria for the diagnosis and treatment of heart failure? J Cardiovasc Transl Res 2013; 7:139-55. [PMID: 24214112 PMCID: PMC3935102 DOI: 10.1007/s12265-013-9514-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 10/07/2013] [Indexed: 12/17/2022]
Abstract
All-cause mortality from cardiovascular disease is declining in the USA. However, there remains a significant difference in risk factors for disease and in mortality between men and women. For example, prevalence and outcomes for heart failure with preserved ejection fraction differ between men and women. The reasons for these differences are multifactorial, but reflect, in part, an incomplete understanding of sex differences in the etiology of cardiovascular diseases and a failure to account for sex differences in pre-clinical studies including those designed to develop new diagnostic and treatment modalities. This review focuses on the underlying physiology of these sex differences and provides evidence that inclusion of female animals in pre-clinical studies of heart failure and in development of imaging modalities to assess cardiac function might provide new information from which one could develop sex-specific diagnostic criteria and approaches to treatment.
Collapse
|