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Liu H, Ru NY, Cai Y, Lyu Q, Guo CH, Zhou Y, Li SH, Cheng JH, Chang JR, Ma J, Su XL. The OPG/RANKL/RANK system modulates calcification of common carotid artery in simulated microgravity rats by regulating NF-κB pathway. Can J Physiol Pharmacol 2021; 100:324-333. [PMID: 34670103 DOI: 10.1139/cjpp-2021-0329] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Functional and structural adaptation of common carotid artery could be one of the important causes of postflight orthostatic intolerance after microgravity exposure, the mechanisms of which remain unclear. Recent evidence indicates that long-term spaceflight increases carotid artery stiffness, which might present a high risk to astronaut health and postflight working ability. Studies have suggested that vascular calcification is a common pathological change in cardiovascular diseases that is mainly manifested as an increase in vascular stiffness. Therefore, this study aimed to investigate whether simulated microgravity induces calcification of common carotid artery and to elucidate the underlying mechanisms. Four-week hindlimb-unweighted (HU) rats were used to simulate the deconditioning effects of microgravity on cardiovascular system. We found that simulated microgravity induced vascular smooth muscle cell (VSMC) osteogenic differentiation and medial calcification, increased receptor activator of nuclear factor κB ligand (RANKL) and RANK expression, and enhanced NF-κB activation in rat common carotid artery. In vitro activation of the RANK pathway with exogenous RANKL, a RANK ligand, increased RANK and osteoprotegerin (OPG) expression in HU rats. Moreover, the expression of osteogenic markers and activation of NF-κB in HU rats were further enhanced by exogenous RANKL but suppressed by the RANK inhibitor OPG-Fc. These results indicated that the OPG/RANKL/RANK system modulates VSMC osteogenic differentiation and medial calcification of common carotid artery in simulated microgravity rats by regulating NF-kB pathway.
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Affiliation(s)
- Huan Liu
- Xi'an Medical University, Department of Basic Medicine, Xi'an, Shaanxi, China.,Fourth Military Medical University, Department of Aerospace Physiology, Xi'an, China;
| | - Ning-Yu Ru
- Xi'an Medical University, Department of Basic Medicine, Xi'an, China;
| | - Yue Cai
- Fourth Military Medical University, Department of Cardiology, Xijing Hospital, Xi'an, China;
| | - Qiang Lyu
- Fourth Military Medical University, Department of Aerospace Physiology, Xi'an, Shaanxi, China;
| | - Chi-Hua Guo
- Xi'an Medical University, Department of Basic Medicine, Xi'an, China;
| | - Ying Zhou
- Xi'an Medical University, Department of Basic Medicine, Xi'an, China;
| | - Shao-Hua Li
- Fourth Military Medical University, 12644, Department of Aerospace Physiology, Xi'an, China;
| | - Jiu-Hua Cheng
- Fourth Military Medical University, Department of Aerospace Physiology, Xi'an, Shaanxi, China;
| | - Jin-Rui Chang
- Xi'an Medical University, Department of Basic Medicine, Xi'an, China;
| | - Jin Ma
- Fourth Military Medical University, Department of Aerospace Physiology, Xi'an, China;
| | - Xing-Li Su
- Xi'an Medical University, Department of Basic Medicine, Xi'an, China;
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Lyu Q, Bai Y, Cheng J, Liu H, Li S, Yang J, Wang Z, Ma Y, Jiang M, Dong D, Yan Y, Shi Q, Ren X, Ma J. Intermittent short-duration reoxygenation protects against simulated high altitude-induced pulmonary hypertension in rats. FASEB J 2020; 35:e21212. [PMID: 33230951 DOI: 10.1096/fj.202000533rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 11/04/2020] [Accepted: 11/09/2020] [Indexed: 12/17/2022]
Abstract
High-altitude pulmonary hypertension (HAPH) is a severe and progressive disease caused by chronic hypoxia and subsequent pulmonary vascular remodeling. No cure is currently available owing to an incomplete understanding about vascular remodeling. It is believed that hypoxia-induced diseases can be prevented by treating hypoxia. Thus, this study aimed to determine whether daily short-duration reoxygenation at sea level attenuates pulmonary hypertension under high-altitude hypoxia. To this end, a simulated 5000-m hypoxia rat model and hypoxic cultured human pulmonary artery smooth muscle cells were used to evaluate the effect of short-duration reoxygenation. Results show that intermittent, not continuous, short-duration reoxygenation effectively attenuates hypoxia-induced pulmonary hypertension. The mechanisms underlining the protective effects involved that intermittent, short-duration reoxygenation prevented functional and structural remodeling of pulmonary arteries and proliferation, migration, and phenotypic conversion of pulmonary artery smooth muscle cells under hypoxia. The specific genes or potential molecular pathways responsible for mediating the protective effects were also characterised by RNA sequencing. Further, the frequency and the total time of intermittent reoxygenation affected its preventive effect of HAPH, which was likely attributable to augmented oxidative stress. Hence, daily intermittent, not continuous, short-duration reoxygenation partially prevented pulmonary hypertension induced by 5000-m hypoxia in rats. This study is novel in revealing a new potential method in preventing HAPH. It gives insights into the selection and optimisation of oxygen supply schemes in high-altitude areas.
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Affiliation(s)
- Qiang Lyu
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Yungang Bai
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Jiuhua Cheng
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Huan Liu
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Shaohua Li
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Jing Yang
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Zhongchao Wang
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Yan Ma
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Min Jiang
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Dong Dong
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Yiquan Yan
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Qixin Shi
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Xinling Ren
- Department of Respiratory Diseases, Xi'an, China
| | - Jin Ma
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
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Su YT, Cheng YP, Zhang X, Xie XP, Chang YM, Bao JX. Acid sphingomyelinase/ceramide mediates structural remodeling of cerebral artery and small mesenteric artery in simulated weightless rats. Life Sci 2020; 243:117253. [PMID: 31927048 DOI: 10.1016/j.lfs.2019.117253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 12/18/2019] [Accepted: 12/27/2019] [Indexed: 12/19/2022]
Abstract
AIMS Weightlessness exposure conduces to substantial vascular remodeling, mechanisms behind which remain unclear. Acid sphingomyelinase (ASM) catalyzed ceramide (Cer) generation accounts for multiple vascular disorders, so the role of it in adjustment of cerebral artery (CA) and small mesenteric artery (MA) was investigated in simulated weightless rats. MAIN METHODS Rats were hindlimb unloaded tail suspended (HU) to simulate the effect of weightlessness. Arterial morphology was examined by hematoxylin-eosin staining. Cer abundance was measured by immunohistochemistry. Western blotting was used to detect protein content. Apoptosis was detected by transferase-mediated dUTP nick end labeling. KEY FINDINGS During 4 weeks of tail suspension, intima-media thickness (IMT) and media cross section area (CSA) were increased gradually in CA but decreased gradually in MA (P < 0.05). Correspondingly, the apoptosis and proliferation of vascular smooth muscle cells were reduced and enhanced respectively in CA (P < 0.05), while promoted and restrained in MA (P < 0.05). As compared to control, both ASM protein expression and Cer content were lowered in CA and elevated in MA of HU rats (P < 0.05). Permeable Cer incubation reversed the change of apoptosis and proliferation in CA of HU rats, while ASM inhibition recapitulated it in control rats. On the contrary, ASM inhibitors restored the alteration of apoptosis and proliferation in MA of HU. SIGNIFICANCE The results suggest that by controlling the balance between apoptosis and proliferation, ASM/Cer exerts an important role in structural adaptation of CA and MA to simulated weightlessness.
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Affiliation(s)
- Yu-Ting Su
- Department of Aerospace Hygiene, Fourth Military Medical University, Xi'an 710032, PR China
| | - Yao-Ping Cheng
- Department of Aerospace Hygiene, Fourth Military Medical University, Xi'an 710032, PR China
| | - Xi Zhang
- Department of Aerospace Hygiene, Fourth Military Medical University, Xi'an 710032, PR China
| | - Xiao-Ping Xie
- Department of Aerospace Hygiene, Fourth Military Medical University, Xi'an 710032, PR China
| | - Yao-Ming Chang
- Department of Aerospace Hygiene, Fourth Military Medical University, Xi'an 710032, PR China.
| | - Jun-Xiang Bao
- Department of Aerospace Hygiene, Fourth Military Medical University, Xi'an 710032, PR China.
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Wu Y, Yue Z, Wang Q, Lv Q, Liu H, Bai Y, Li S, Xie M, Bao J, Ma J, Zhu X, Wang Z. BK Ca compensates impaired coronary vasoreactivity through RhoA/ROCK pathway in hind-limb unweighted rats. FASEB J 2019; 33:13358-13366. [PMID: 31530101 DOI: 10.1096/fj.201901273r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Previous studies have demonstrated cardiac and vascular remodeling induced by microgravity exposure. Yet, as the most important branch of vasculatures circulating the heart, the coronary artery has been seldomly studied about its adaptations under microgravity conditions. Large-conductance Ca2+-activated potassium channel (BKCa) and the Ras homolog family member A (RhoA)/Rho kinase (ROCK) pathway play key roles in control of vascular tone and mediation of microgravity-induced vascular adjustments. Therefore, we investigated the adaptation of coronary vasoreactivity to simulated microgravity and the role of BKCa and the RhoA/ROCK pathway in it. Four-week-old hind-limb unweighted (HU) rats were adopted to simulate effects of microgravity. Right coronary artery (RCA) constriction was measured by isometric force recording. The activity and expression of BKCa and the RhoA/ROCK pathway were examined by Western blot, patch-clamp recordings, and immunoprecipitation. We found HU significantly decreased RCA vasoconstriction to KCl, serotonin, and U-46619, but increased protein expression and current densities of BKCa, inhibition of which by iberiotoxin (IBTX) further decreased RCA vasoconstriction (P < 0.05). Expression of RhoA and ROCK as well as active RhoA and phosphorylation of myosin light chain (MLC) at Ser19 and MLC phosphatase target-1 at Thr696 were significantly increased by HU, and ROCK inhibitor Y-27632 exerted greater suppressing effect on HU RCA vasoconstriction than that of control (P < 0.05). BKCa opener NS1619 increased HU RCA vasoconstriction, which was blocked by both RhoA and ROCK inhibitor, similar to the effect of IBTX. These results indicate that HU impairs coronary vasoconstriction but enhances BKCa activity acting as a protective mechanism avoiding excessive decrease of coronary vasoreactivity through activation of the RhoA/ROCK pathway.-Wu, Y., Yue, Z., Wang, Q., Lv, Q., Liu, H., Bai, Y., Li, S., Xie, M., Bao, J., Ma, J., Zhu, X., Wang, Z. BKCa compensates impaired coronary vasoreactivity through RhoA/ROCK pathway in hind-limb unweighted rats.
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Affiliation(s)
- Yue Wu
- Department of Congenital Heart Disease, General Hospital of Northern Theater Command, Shenyang, China.,Department of Medical Administration, General Hospital of Northern Theater Command, Shenyang, China
| | - Zhijie Yue
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China.,Department of Cardiology, Affiliated Hospital of The Bethune Medical Noncommissioned Officer (NCO) School, Army Medical University, Shijiazhuang, China
| | - Qiguang Wang
- Department of Congenital Heart Disease, General Hospital of Northern Theater Command, Shenyang, China
| | - Qiang Lv
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Huan Liu
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Yungang Bai
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Shaohua Li
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Manjiang Xie
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Junxiang Bao
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Jin Ma
- Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
| | - Xianyang Zhu
- Department of Congenital Heart Disease, General Hospital of Northern Theater Command, Shenyang, China
| | - Zhongchao Wang
- Department of Congenital Heart Disease, General Hospital of Northern Theater Command, Shenyang, China.,Department of Aerospace Physiology, Fourth Military Medical University, Xi'an, China
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Deng B, Liu R, Tian X, Han Z, Chen J. Simulated microgravity inhibits the viability and migration of glioma via FAK/RhoA/Rock and FAK/Nek2 signaling. In Vitro Cell Dev Biol Anim 2019; 55:260-271. [DOI: 10.1007/s11626-019-00334-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 02/05/2019] [Indexed: 12/12/2022]
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Jiang M, Lyu Q, Bai YG, Liu H, Yang J, Cheng JH, Zheng M, Ma J. Focal adhesions are involved in simulated-microgravity-induced basilar and femoral arterial remodelling in rats. Can J Physiol Pharmacol 2018. [PMID: 29527943 DOI: 10.1139/cjpp-2017-0665] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recent studies have suggested that microgravity-induced arterial remodelling contributes to post-flight orthostatic intolerance and that multiple mechanisms are involved in arterial remodelling. However, the initial mechanism by which haemodynamic changes induce arterial remodelling is unknown. Focal adhesions (FAs) are dynamic protein complexes that have mechanotransduction properties. This study aimed to investigate the role of FAs in simulated-microgravity-induced basilar and femoral arterial remodelling. A 4-week hindlimb-unweighted (HU) rat model was used to simulate the effects of microgravity, and daily 1-hour intermittent artificial gravity (IAG) was used to prevent arterial remodelling. After 4-week HU, wall thickness, volume of smooth muscle cells (SMCs) and collagen content were increased in basilar artery but decreased in femoral artery (P < 0.05). Additionally, the expression of p-FAK Y397 and p-Src Y418 was increased and reduced in SMCs of basilar and femoral arteries, respectively, by HU (P < 0.05). The number of FAs was increased in basilar artery and reduced in femoral artery by HU (P < 0.05). Furthermore, daily 1-hour IAG prevented HU-induced differential structural adaptations and changes in FAs of basilar and femoral arteries. These results suggest that FAs may act as mechanosensors in arterial remodelling by initiating intracellular signal transduction in response to altered mechanical stress induced by microgravity.
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Affiliation(s)
- Min Jiang
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Qiang Lyu
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yun-Gang Bai
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Huan Liu
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Jing Yang
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Jiu-Hua Cheng
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Ming Zheng
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Jin Ma
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.,Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
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Kitazawa T, Kitazawa K. Prolonged bed rest impairs rapid CPI-17 phosphorylation and contraction in rat mesenteric resistance arteries to cause orthostatic hypotension. Pflugers Arch 2017; 469:1651-1662. [PMID: 28717991 DOI: 10.1007/s00424-017-2031-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/03/2017] [Accepted: 07/09/2017] [Indexed: 02/07/2023]
Abstract
Prolonged bed rest (PBR) causes orthostatic hypotension (OH). Rapid constriction of splanchnic resistance arteries in response to a sudden increase in sympathetic tone contributes to the recovery of orthostatic arterial pressure upon standing. However, the molecular mechanism of PBR-induced dysfunction in arterial constriction is not fully understood. Previously, we showed that CPI-17, a regulatory protein for myosin phosphatase, mediates α1A-adrenergic receptor-induced rapid contraction of small mesenteric arteries. Here, we tested whether PBR associated with OH affects the α1-adrenergic receptor-induced CPI-17 signaling pathway in mesenteric arteries using rats treated by head-down tail-suspension hindlimb unloading (HDU), an experimental OH model. In normal anesthetized rats, mean arterial pressure (MAP) rapidly reduced upon 90° head-up tilt from supine position and then immediately recovered without change in heart rate, suggesting a rapid arterial constriction. On the other hand, after a 4-week HDU treatment, the fast orthostatic MAP recovery failed for 1 min. Alpha1A subtype-specific antagonist suppressed the orthostatic MAP recovery with a small decrease in basal blood pressure, whereas non-specific α1-antagonist prazosin strongly reduced both basal MAP and orthostatic recovery. The HDU treatment resulted in 68% reduction in contraction in parallel with 83% reduction in CPI-17 phosphorylation in denuded mesenteric arteries 10 s after α1-agonist stimulation. The treatment with either Ca2+-release channel opener or PKC inhibitor mimicked the deficiency in HDU arteries. These results suggest that an impairment of the rapid PKC/CPI-17 signaling pathway downstream of α1A-adrenoceptors in peripheral arterial constriction, as an end organ of orthostatic blood pressure reflex, is associated with OH in prolonged bed rest patients.
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Affiliation(s)
- Toshio Kitazawa
- Boston Biomedical Research Institute, Watertown, MA, 02472, USA. .,Department of Molecular Physiology and Biophysics, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA, 19107, USA.
| | - Kazuyo Kitazawa
- Boston Biomedical Research Institute, Watertown, MA, 02472, USA
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