1
|
Jósvai A, Török M, Hetthéssy J, Mátrai M, Monori-Kiss A, Makk J, Vezér M, Sára L, Szabó I, Székács B, Nádasy GL, Várbíró S. Additive damage in the thromboxane related vasoconstriction and bradykinin relaxation of intramural coronary resistance arterioles in a rodent model of andropausal hypertension. Heliyon 2022; 8:e11533. [PMID: 36406706 PMCID: PMC9667244 DOI: 10.1016/j.heliyon.2022.e11533] [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: 03/05/2022] [Revised: 04/17/2022] [Accepted: 11/04/2022] [Indexed: 11/13/2022] Open
Abstract
Hypertension and andropause both accelerate age–related vascular deterioration. We aimed to evaluate the effects of angiotensin-II induced hypertension and deficiency of testosterone combined regarding the resistance coronaries found intramurally. Four male groups were formed from the animals: control group (Co, n = 10); the group that underwenr orchidectomy (ORC, n = 13), those that received an infusion of angiotensin-II (AII, n = 10) and a grous that received AII infusion and were also surgically orchidectomized (AII + ORC, n = 8). AII and AII + ORC animals were infused with infusing angiotensin-II (100 ng/min/kg) using osmotic minipumps. Orchidectomy was perfomed in the ORC and the AII + ORC groupsto establish deficiency regarding testosterone. Following four weeks of treatment, pressure-arteriography was performed in vitro, and the tone induced by administration of thromboxane-agonist (U46619) and bradykinin during analysis of the intramural coronaries (well-known to be resistance arterioles) was studied. U46619-induced vasoconstriction poved to be significantly decreased in the ORC and AII + ORC groups when compared with Co and AII animals. In ORC and AII + ORC groups, the bradykinin-induced relaxation was also significantly reduced to a greater extent compared to Co and AII rats. Following orchidectomy, the vasocontraction and vasodilatation capacity of blood vessels is reduced. The effect of testosterone deficiency on constrictor tone and relaxation remains pronounced even in AII hypertension: testosterone deficiency further narrows adaptation range in the double noxa (AII + ORC) group. Our studies suggest that vascular changes caused by high blood pressure and testosterone deficiency together may significantly increase age-related cardiovascular risk.
Collapse
Affiliation(s)
- Attila Jósvai
- Doctoral School of Theoretical and Translational Medicine, Semmelweis University, Budapest, Hungary
- Department of Neurosurgery, Hungarian Defense Forces Medical Centre, Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
- Workgroup of Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
- Corresponding author.
| | - Judit Hetthéssy
- Workgroup of Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
- Department of Orthopedics, Semmelweis University, Budapest, Hungary
| | - Máté Mátrai
- Institute of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Jennifer Makk
- Institute of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Márton Vezér
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Levente Sára
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - István Szabó
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Béla Székács
- Department Internal Medicine, Department Section of Geriatrics, Szt Imre Teaching Hospital, Budapest, Hungary
| | - György L. Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
- Workgroup of Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
| |
Collapse
|
2
|
Sipos M, Gerszi D, Dalloul H, Bányai B, Sziva RE, Kollarics R, Magyar P, Török M, Ács N, Szekeres M, Nádasy GL, Hadjadj L, Horváth EM, Várbíró S. Vitamin D Deficiency and Gender Alter Vasoconstrictor and Vasodilator Reactivity in Rat Carotid Artery. Int J Mol Sci 2021; 22:ijms22158029. [PMID: 34360792 PMCID: PMC8347553 DOI: 10.3390/ijms22158029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/19/2021] [Accepted: 07/22/2021] [Indexed: 01/07/2023] Open
Abstract
The vitamin-D-sensitivity of the cardiovascular system may show gender differences. The prevalence of vitamin D (VD) deficiency (VDD) is high, and it alters cardiovascular function and increases the risk of stroke. Our aim was to investigate the vascular reactivity and histological changes of isolated carotid artery of female and male rats in response to different VD supplies. A total of 48 male and female Wistar rats were divided into four groups: female VD supplemented, female VDD, male VD supplemented, male VDD. The vascular function of isolated carotid artery segments was examined by wire myography. Both vitamin D deficiency and male gender resulted in increased phenylephrine-induced contraction. Acetylcholine-induced relaxation decreased in male rats independently from VD status. Inhibition of prostanoid signaling by indomethacin reduced contraction in females, but increased relaxation ability in male rats. Functional changes were accompanied by VDD and gender-specific histological alterations. Elastic fiber density was significantly decreased by VDD in female rats, but not in males. Smooth muscle actin and endothelial nitric oxide synthase levels were significantly lowered, but the thromboxane receptor was elevated in VDD males. Decreased nitrative stress was detected in both male groups independently from VD supply. The observed interactions between vitamin D deficiency and sex may play a role in the gender difference of cardiovascular risk.
Collapse
Affiliation(s)
- Miklós Sipos
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
| | - Dóra Gerszi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Hicham Dalloul
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
| | - Bálint Bányai
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Réka Eszter Sziva
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
- Correspondence:
| | - Réka Kollarics
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Péter Magyar
- Medical Imaging Centre, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary;
| | - Marianna Török
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
| | - Mária Szekeres
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, Vas Street 17, 1088, Budapest, Hungary
| | - György L. Nádasy
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Leila Hadjadj
- Department of Translational Medicine, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary;
| | - Eszter Mária Horváth
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
| |
Collapse
|
3
|
Merkely P, Bakos M, Bányai B, Monori-Kiss A, Horváth EM, Bognár J, Benkő R, Oláh A, Radovits T, Merkely B, Ács N, Nádasy GL, Török M, Várbíró S. Sex Differences in Exercise-Training-Related Functional and Morphological Adaptation of Rat Gracilis Muscle Arterioles. Front Physiol 2021; 12:685664. [PMID: 34322036 PMCID: PMC8313298 DOI: 10.3389/fphys.2021.685664] [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: 03/25/2021] [Accepted: 06/17/2021] [Indexed: 12/17/2022] Open
Abstract
Background The cardiovascular effects of training have been widely investigated; however, few studies have addressed sex differences in arteriolar adaptation. In the current study, we examined the adaptation of the gracilis arterioles of male and female rats in response to intensive training. Methods Wistar rats were divided into four groups: male exercise (ME) and female exercise (FE) animals that underwent a 12-week intensive swim-training program (5 days/week, 200 min/day); and male control (MC) and female control (FC) animals that were placed in water for 5 min daily. Exercise-induced cardiac hypertrophy was confirmed by echocardiography. Following the training, the gracilis muscle arterioles were prepared, and their biomechanical properties and functional reactivity were tested, using pressure arteriography. Collagen and smooth muscle remodeling were observed in the histological sections. Results Left ventricular mass was elevated in both sexes in response to chronic training. In the gracilis arterioles, the inner radius and wall tension increased in female animals, and the wall thickness and elastic modulus were reduced in males. Myogenic tone was reduced in the ME group, whereas norepinephrine-induced vasoconstriction was elevated in the FE group. More pronounced collagen staining was observed in the ME group than in the MC group. Relative hypertrophy and tangential stress of the gracilis arterioles were higher in females than in males. The direct vasoconstriction induced by testosterone was lower in females and was reduced as an effect of exercise in males. Conclusion The gracilis muscle arteriole was remodeled as a result of swim training, and this adaptation was sex dependent.
Collapse
Affiliation(s)
- Petra Merkely
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Marcell Bakos
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Bálint Bányai
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Eszter M Horváth
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Judit Bognár
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary.,Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Rita Benkő
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - György L Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| |
Collapse
|
4
|
Jósvai A, Török M, Mátrai M, Hetthéssy J, Monori-Kiss A, Makk J, Székács B, Nádasy GL, Várbíró S. Effects of Testosterone Deficiency and Angiotensin II-Induced Hypertension on the Biomechanics of Intramural Coronary Arteries. J Sex Med 2020; 17:2322-2330. [PMID: 33067160 DOI: 10.1016/j.jsxm.2020.09.003] [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: 06/01/2020] [Revised: 08/14/2020] [Accepted: 09/12/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Andropause and hypertension also increase the risk of coronary artery damage. AIM To investigate the effect of testosterone deficiency and hypertension on intramural coronary vessels. METHODS 4 groups of 8-week-old Sprague-Dawley rats were studied: control male (Co, n=10), orchidectomized male (OCT, n=13), angiotensin (AII) hypertensive male (AII, n=10), and AII hypertensive and OCT (AII + OCT, n=8). Surgical orchidectomy was performed, and an osmotic minipump was inserted for chronic angiotensin II infusion (100 ng/min/kg). After 4 weeks, spontaneous tone and biomechanical properties of the intramural coronary resistance artery were investigated in vitro, by pressure microarteriography. OUTCOMES Morphology and biomechanics of the intramural coronaries were evaluated: the outer diameter, wall thickness-to-lumen diameter ratio, and tangential wall stress in the contracted and relaxed states. RESULTS The outer diameter was reduced in OCT and AII + OCT groups (on 50 mmHg 315 ± 20 Co; 237 ± 21 OCT; 291 ± 16 AII, and 166 ± 12 μm AII + OCT). The increased wall thickness-to-lumen diameter ratio resulted in lower tangential wall stress in AII + OCT rats (on 50 mmHg 19 ± 2 Co; 24 ± OCT; 26 ± 5 AII, and 9 ± 1 kPa AII + OCT). Spontaneous tone was increased in the hypertensive rats (AII and AII + OCT groups) (on 50 mmHg 7.7 ± 1.8 Co; 6.1 ± 1.4 OCT; 14.5 ± 3.0 AII, and 17.4 ± 4.1 % AII + OCT). CLINICAL IMPLICATIONS Andropause alone can be considered as a cardiovascular risk factor that will further exacerbate vascular damage in hypertension. STRENGTHS & LIMITATIONS A limitation of our study is that it was performed on relatively young rats, and the conclusions might not apply to coronary remodelling in older animals with slower adaptation processes. CONCLUSIONS Testosterone deficiency and hypertension damage the mechanical adaptation of the vessel wall additively: double noxa caused inward eutrophic remodeling and increased tone. Jósvai A, Török M, Mátrai M, et al. Effects of Testosterone Deficiency and Angiotensin II-Induced Hypertension on the Biomechanics of Intramural Coronary Arteries. J Sex Med 2020;17:2322-2330.
Collapse
Affiliation(s)
- Attila Jósvai
- Department of Neurosurgery, Hungarian Defence Forces Medical Centre, Budapest, Hungary.
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Máté Mátrai
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Judit Hetthéssy
- Department of Orthopedics, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Jennifer Makk
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Béla Székács
- 2nd Department Internal Medicine, Department Section of Geriatrics, Szt Imre Teaching Hospital, Budapest, Hungary
| | - György L Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| |
Collapse
|
5
|
Vitamin D Deficiency Induces Elevated Oxidative and Biomechanical Damage in Coronary Arterioles in Male Rats. Antioxidants (Basel) 2020; 9:antiox9100997. [PMID: 33076449 PMCID: PMC7602574 DOI: 10.3390/antiox9100997] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/01/2020] [Accepted: 10/12/2020] [Indexed: 12/12/2022] Open
Abstract
Background: Several reports prove interconnection between vitamin D (VD) deficiency and increased cardiovascular risk. Our aim was to investigate the effects of VD status on biomechanical and oxidative–nitrative (O–N) stress parameters of coronary arterioles in rats. Methods: 4-week-old male Wistar rats were divided into a control group (11 animals) with optimal VD supply (300 IU/kgbw/day) and a VD-deficient group (11 animals, <5 IU/kg/day). After 8 weeks, coronary arteriole segments were prepared. Geometrical, elastic, and biomechanical characteristics were measured by in vitro arteriography. O–N stress markers were investigated by immunohistochemistry. Results: Inner radius decreased; wall thickness and wall-thickness/lumen diameter ratio increased; tangential wall stress and elastic modulus were reduced in VD-deficient group. No difference could be found in wall-cross-sectional area, intima-media area %. While the elastic elements of the vessel wall decreased, the α-smooth muscle actin (α-SMA) immunostaining intensity showed no changes. Significant elevation was found in the lipid peroxidation marker of 4-hidroxy-2-nonenal (HNE), while other O–N stress markers staining intensity (poly(ADP)ribose, 3-nitrotyrosine) did not change. Conclusions: Inward eutrophic remodeling has developed. The potential background of these impairments may involve the initial change in oxidative damage markers (HNE). These mechanisms can contribute to the increased incidence of the cardiovascular diseases in VD deficiency.
Collapse
|
6
|
TÖrÖk M, HorvÁth EM, Monori-Kiss A, PÁl É, Gerszi D, Merkely P, Sayour AA, MÁtyÁs C, OlÁh A, Radovits T, Merkely B, Ács N, NÁdasy GL, VÁrbÍrÓ S. Chronic swimming training resulted in more relaxed coronary arterioles in male and enhanced vasoconstrictor ability in female rats. J Sports Med Phys Fitness 2020; 61:489-496. [PMID: 32744049 DOI: 10.23736/s0022-4707.20.11316-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Exercise training is associated with hypertrophy of left ventricle (LV). The aim of the present study is to evaluate sex differences in the adaptation of the coronary contractile function in physiological left ventricular hypertrophy induced by long-term swim training. METHODS Thirty-two Wistar rats were randomly divided into 4 groups: exercised male (ExM), exercised female (ExF), untrained control male (CoM), and untrained control female (CoF). The trained animals underwent a 12-week-long swim training program. After finishing the training program, LV morphology and function were checked by echocardiography. The spontaneous tone, thromboxane (TxA<inf>2</inf>) agonist-induced vascular contractility and non-endothelial dilatation of the isolated intramural coronary resistance artery were examined by pressure microangiometry. The thromboxane receptor (TxA<inf>2</inf>R) protein expression in the wall of coronary arteries was examined using immunohistochemistry. RESULTS The LV mass index was significantly higher in the ExM and ExF groups, furthermore the LV mass index was significantly higher in female than in male animals. ExM animals had lower spontaneous tone than ExF. TxA<inf>2</inf> agonist-induced tone was raised only in ExF animals. The resistance coronary artery of exercised male animals had a significantly lower level of TxA<inf>2</inf>R positivity compared to exercised females. CONCLUSIONS Both sexes broaden their range of contractility following chronic swimming, but the vessel tone shifted toward contraction in exercised female rats, while these values shifted toward relaxation in males. These observations underline the significance of identifying potential gender differences in the chronic exercise-induced coronary vascular remodeling in human athletes.
Collapse
Affiliation(s)
- Marianna TÖrÖk
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary -
| | - Eszter M HorvÁth
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Éva PÁl
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Dóra Gerszi
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Petra Merkely
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Alex A Sayour
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Csaba MÁtyÁs
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Attila OlÁh
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - György L NÁdasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Szabolcs VÁrbÍrÓ
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| |
Collapse
|
7
|
Török M, Monori-Kiss A, Pál É, Horváth E, Jósvai A, Merkely P, Barta BA, Mátyás C, Oláh A, Radovits T, Merkely B, Ács N, Nádasy GL, Várbíró S. Long-term exercise results in morphological and biomechanical changes in coronary resistance arterioles in male and female rats. Biol Sex Differ 2020; 11:7. [PMID: 32051031 PMCID: PMC7017613 DOI: 10.1186/s13293-020-0284-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 02/05/2020] [Indexed: 12/16/2022] Open
Abstract
Background Biomechanical remodeling of coronary resistance arteries in physiological left ventricular hypertrophy has not yet been analyzed, and the possible sex differences are unknown. Methods Wistar rats were divided into four groups: male and female sedentary controls (MSe and FSe) and male and female animals undergoing a 12-week intensive swim training program (MEx and FEx). On the last day, the in vitro contractility, endothelium-dependent dilatation, and biomechanical properties of the intramural coronary resistance arteries were investigated by pressure microarteriography. Elastica and collagen remodeling were studied in histological sections. Results A similar outer radius and reduced inner radius resulted in an elevated wall to lumen ratio in the MEx and FEx animals compared to that in the sedentary controls. The wall elastic moduli increased in the MEx and FEx rats. Spontaneous and TxA2 agonist-induced tone was increased in the FEx animals, whereas endothelium-dependent relaxation became more effective in MEx rats. Arteries of FEx rats had stronger contraction, while arteries of MEx animals had improved dilation. Conclusions According to our results, the coronary arterioles adapted to an elevated load during long-term exercise, and this adaptation depended on sex. It is important to emphasize that in addition to differences, we also found many similarities between the sexes in the adaptive response to exercise. The observed sport adaptation in the coronary resistance arteries of rats may contribute to a better understanding of the physiological and pathological function of these arteries in active and retired athletes of different sexes.
Collapse
Affiliation(s)
- Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary.
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Éva Pál
- Institute of Clinical Experimental Research, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Eszter Horváth
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - Attila Jósvai
- Department of Neurosurgery, Military Hospital, Róbert Károly körút 44, Budapest, 1134, Hungary
| | - Petra Merkely
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - Bálint András Barta
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Csaba Mátyás
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - György László Nádasy
- Department of Physiology, Semmelweis University, Tűzoltó u 37-47, Budapest, 1094, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| |
Collapse
|
8
|
Zimmerman MA, Baban B, Tipton AJ, O'Connor PM, Sullivan JC. Chronic ANG II infusion induces sex-specific increases in renal T cells in Sprague-Dawley rats. Am J Physiol Renal Physiol 2014; 308:F706-12. [PMID: 25503730 DOI: 10.1152/ajprenal.00446.2014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 12/02/2014] [Indexed: 01/09/2023] Open
Abstract
Recent studies suggest that sex of the animal and T cell impact ANG II hypertension in Rag(-/-) mice, with females being protected relative to males. This study tested the hypothesis that ANG II results in greater increases in proinflammatory T cells and cytokines in males than in females. Male and female Sprague-Dawley (SD) rats, aged 12 wk, were treated with vehicle or ANG II (200 ng·kg(-1)·min(-1)) for 2 wk. Renal CD4(+) T cells and Tregs were comparable between vehicle-treated males and females, although males expressed more Th17 and IL-17(+) T cells and fewer IL-10(+) T cells than females. ANG II resulted in greater increases in CD4(+) T cells, Th17 cells, and IL-17(+) cells in males; Tregs increased only in females. We previously showed that ANG (1-7) antagonizes ANG II-induced increases in blood pressure in females and ANG (1-7) has been suggested to be anti-inflammatory. Renal ANG (1-7) levels were greater in female SD at baseline and following ANG II infusion. Additional rats were treated with ANG II plus the ANG (1-7)-mas receptor antagonist A-779 (48 μg·kg(-1)·h(-1)) to test the hypothesis that greater ANG (1-7) in females results in more Tregs relative to males. Inhibition of ANG (1-7) did not alter renal T cells in either sex. In conclusion, ANG II induces a sex-specific effect on the renal T cell profile. Males have greater increases in proinflammatory T cells, and females have greater increases in anti-inflammatory Tregs; however, sex differences in the renal T cell profile are not mediated by ANG (1-7).
Collapse
Affiliation(s)
| | - Babak Baban
- Department of Oral Biology, Georgia Regents University, Augusta, Georgia
| | - Ashlee J Tipton
- Department of Physiology, Georgia Regents University, Augusta, Georgia; and
| | - Paul M O'Connor
- Department of Physiology, Georgia Regents University, Augusta, Georgia; and
| | | |
Collapse
|
9
|
Abstract
Hypertension is a complex and multifaceted disease, and there are well established sex differences in many aspects of blood pressure (BP) control. The intent of this review is to highlight recent work examining sex differences in the molecular mechanisms of BP control in hypertension to assess whether the "one-size-fits-all" approach to BP control is appropriate with regard to sex.
Collapse
|