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Vén K, Besztercei B, Janovicz A, Karsai N, Chun J, Tigyi G, Benyó Z, Ruisanchez É. LPA-Induced Thromboxane A2-Mediated Vasoconstriction Is Limited to Poly-Unsaturated Molecular Species in Mouse Aortas. Int J Mol Sci 2024; 25:6872. [PMID: 38999980 PMCID: PMC11241118 DOI: 10.3390/ijms25136872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/14/2024] Open
Abstract
We have previously reported that, in aortic rings, 18:1 lysophosphatidic acid (LPA) can induce both vasodilation and vasoconstriction depending on the integrity of the endothelium. The predominant molecular species generated in blood serum are poly-unsaturated LPA species, yet the vascular effects of these species are largely unexplored. We aimed to compare the vasoactive effects of seven naturally occurring LPA species in order to elucidate their potential pathophysiological role in vasculopathies. Vascular tone was measured using myography, and thromboxane A2 (TXA2) release was detected by ELISA in C57Bl/6 mouse aortas. The Ca2+-responses to LPA-stimulated primary isolated endothelial cells were measured by Fluo-4 AM imaging. Our results indicate that saturated molecular species of LPA elicit no significant effect on the vascular tone of the aorta. In contrast, all 18 unsaturated carbon-containing (C18) LPAs (18:1, 18:2, 18:3) were effective, with 18:1 LPA being the most potent. However, following inhibition of cyclooxygenase (COX), these LPAs induced similar vasorelaxation, primarily indicating that the vasoconstrictor potency differed among these species. Indeed, C18 LPA evoked a similar Ca2+-signal in endothelial cells, whereas in endothelium-denuded aortas, the constrictor activity increased with the level of unsaturation, correlating with TXA2 release in intact aortas. COX inhibition abolished TXA2 release, and the C18 LPA induced vasoconstriction. In conclusion, polyunsaturated LPA have markedly increased TXA2-releasing and vasoconstrictor capacity, implying potential pathophysiological consequences in vasculopathies.
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Affiliation(s)
- Krisztina Vén
- Institute of Translational Medicine, Semmelweis University, 1085 Budapest, Hungary; (K.V.); (B.B.); (A.J.); (N.K.); (G.T.); (Z.B.)
- Department of Neurology, Semmelweis University, 1085 Budapest, Hungary
| | - Balázs Besztercei
- Institute of Translational Medicine, Semmelweis University, 1085 Budapest, Hungary; (K.V.); (B.B.); (A.J.); (N.K.); (G.T.); (Z.B.)
| | - Anna Janovicz
- Institute of Translational Medicine, Semmelweis University, 1085 Budapest, Hungary; (K.V.); (B.B.); (A.J.); (N.K.); (G.T.); (Z.B.)
- HUN-REN-SU Cerebrovascular and Neurocognitive Disorders Research Group, 1094 Budapest, Hungary
| | - Noémi Karsai
- Institute of Translational Medicine, Semmelweis University, 1085 Budapest, Hungary; (K.V.); (B.B.); (A.J.); (N.K.); (G.T.); (Z.B.)
- Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, Queen’s Medical Centre, University of Nottingham, Nottingham NG7 2RD, UK
| | - Jerold Chun
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Gábor Tigyi
- Institute of Translational Medicine, Semmelweis University, 1085 Budapest, Hungary; (K.V.); (B.B.); (A.J.); (N.K.); (G.T.); (Z.B.)
- Department of Physiology, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA
| | - Zoltán Benyó
- Institute of Translational Medicine, Semmelweis University, 1085 Budapest, Hungary; (K.V.); (B.B.); (A.J.); (N.K.); (G.T.); (Z.B.)
- HUN-REN-SU Cerebrovascular and Neurocognitive Disorders Research Group, 1094 Budapest, Hungary
| | - Éva Ruisanchez
- Institute of Translational Medicine, Semmelweis University, 1085 Budapest, Hungary; (K.V.); (B.B.); (A.J.); (N.K.); (G.T.); (Z.B.)
- HUN-REN-SU Cerebrovascular and Neurocognitive Disorders Research Group, 1094 Budapest, Hungary
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Bányai B, Vass Z, Kiss S, Balogh A, Brandhuber D, Karvaly G, Kovács K, Nádasy GL, Hunyady L, Dörnyei G, Horváth EM, Szekeres M. Role of CB1 Cannabinoid Receptors in Vascular Responses and Vascular Remodeling of the Aorta in Female Mice. Int J Mol Sci 2023; 24:16429. [PMID: 38003619 PMCID: PMC10671338 DOI: 10.3390/ijms242216429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/31/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Both the endocannabinoid system (ECS) and estrogens have significant roles in cardiovascular control processes. Cannabinoid type 1 receptors (CB1Rs) mediate acute vasodilator and hypotensive effects, although their role in cardiovascular pathological conditions is still controversial. Estrogens exert cardiovascular protection in females. We aimed to study the impact of ECS on vascular functions. Experiments were performed on CB1R knockout (CB1R KO) and wild-type (WT) female mice. Plasma estrogen metabolite levels were determined. Abdominal aortas were isolated for myography and histology. Vascular effects of phenylephrine (Phe), angiotensin II, acetylcholine (Ach) and estradiol (E2) were obtained and repeated with inhibitors of nitric oxide synthase (NOS, Nω-nitro-L-arginine) and of cyclooxygenase (COX, indomethacin). Histological stainings (hematoxylin-eosin, resorcin-fuchsin) and immunostainings for endothelial NOS (eNOS), COX-2, estrogen receptors (ER-α, ER-β) were performed. Conjugated E2 levels were higher in CB1R KO compared to WT mice. Vasorelaxation responses to Ach and E2 were increased in CB1R KO mice, attenuated by NOS-inhibition. COX-inhibition decreased Phe-contractions, while it increased Ach-relaxation in the WT group but not in the CB1R KO. Effects of indomethacin on E2-relaxation in CB1R KO became opposite to that observed in WT. Histology revealed lower intima/media thickness and COX-2 density, higher eNOS and lower ER-β density in CB1R KO than in WT mice. CB1R KO female mice are characterized by increased vasorelaxation associated with increased utilization of endothelial NO and a decreased impact of constrictor prostanoids. Our results indicate that the absence or inhibition of CB1Rs may have beneficial vascular effects.
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Affiliation(s)
- Bálint Bányai
- Department of Physiology, Faculty of Medicine, Semmelweis University, 37-47 Tűzoltó Street, 1094 Budapest, Hungary; (B.B.); (S.K.); (G.L.N.); (L.H.); (E.M.H.)
| | - Zsolt Vass
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, 1088 Budapest, Hungary; (Z.V.); (A.B.); (D.B.)
| | - Stella Kiss
- Department of Physiology, Faculty of Medicine, Semmelweis University, 37-47 Tűzoltó Street, 1094 Budapest, Hungary; (B.B.); (S.K.); (G.L.N.); (L.H.); (E.M.H.)
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, 1088 Budapest, Hungary; (Z.V.); (A.B.); (D.B.)
| | - Anikó Balogh
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, 1088 Budapest, Hungary; (Z.V.); (A.B.); (D.B.)
| | - Dóra Brandhuber
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, 1088 Budapest, Hungary; (Z.V.); (A.B.); (D.B.)
| | - Gellért Karvaly
- Department of Laboratory Medicine, Faculty of Medicine, Semmelweis University, 4 Nagyvárad Square, 1089 Budapest, Hungary; (G.K.); (K.K.)
| | - Krisztián Kovács
- Department of Laboratory Medicine, Faculty of Medicine, Semmelweis University, 4 Nagyvárad Square, 1089 Budapest, Hungary; (G.K.); (K.K.)
| | - György L. Nádasy
- Department of Physiology, Faculty of Medicine, Semmelweis University, 37-47 Tűzoltó Street, 1094 Budapest, Hungary; (B.B.); (S.K.); (G.L.N.); (L.H.); (E.M.H.)
| | - László Hunyady
- Department of Physiology, Faculty of Medicine, Semmelweis University, 37-47 Tűzoltó Street, 1094 Budapest, Hungary; (B.B.); (S.K.); (G.L.N.); (L.H.); (E.M.H.)
- Institute of Enzymology, HUN-REN Research Centre for Natural Sciences, 2 Magyar Tudósok Körútja, 1117 Budapest, Hungary
| | - Gabriella Dörnyei
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, 1088 Budapest, Hungary; (Z.V.); (A.B.); (D.B.)
| | - Eszter Mária Horváth
- Department of Physiology, Faculty of Medicine, Semmelweis University, 37-47 Tűzoltó Street, 1094 Budapest, Hungary; (B.B.); (S.K.); (G.L.N.); (L.H.); (E.M.H.)
| | - Mária Szekeres
- Department of Physiology, Faculty of Medicine, Semmelweis University, 37-47 Tűzoltó Street, 1094 Budapest, Hungary; (B.B.); (S.K.); (G.L.N.); (L.H.); (E.M.H.)
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, 1088 Budapest, Hungary; (Z.V.); (A.B.); (D.B.)
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Janovicz A, Majer A, Kosztelnik M, Geiszt M, Chun J, Ishii S, Tigyi GJ, Benyó Z, Ruisanchez É. Autotaxin-lysophosphatidic acid receptor 5 axis evokes endothelial dysfunction via reactive oxygen species signaling. Exp Biol Med (Maywood) 2023; 248:1887-1894. [PMID: 37837357 PMCID: PMC10792427 DOI: 10.1177/15353702231199081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 07/29/2023] [Indexed: 10/16/2023] Open
Abstract
Lysophosphatidylcholine (LPC) is a bioactive lipid that has been shown to attenuate endothelium-dependent vasorelaxation contributing to endothelial dysfunction; however, the underlying mechanisms are not well understood. In this study, we investigated the molecular mechanisms involved in the development of LPC-evoked impairment of endothelium-dependent vasorelaxation. In aortic rings isolated from wild-type (WT) mice, a 20-min exposure to LPC significantly reduced the acetylcholine chloride (ACh)-induced vasorelaxation indicating the impairment of normal endothelial function. Interestingly, pharmacological inhibition of autotaxin (ATX) by GLPG1690 partially reversed the endothelial dysfunction, suggesting that lysophosphatidic acid (LPA) derived from LPC may be involved in the effect. Therefore, the effect of LPC was also tested in aortic rings isolated from different LPA receptor knock-out (KO) mice. LPC evoked a marked reduction in ACh-dependent vasorelaxation in Lpar1, Lpar2, and Lpar4 KO, but its effect was significantly attenuated in Lpar5 KO vessels. Furthermore, addition of superoxide dismutase reduced the LPC-induced endothelial dysfunction in WT but not in the Lpar5 KO mice. In addition, LPC increased H2O2 release from WT vessels, which was significantly reduced in Lpar5 KO vessels. Our findings indicate that the ATX-LPA-LPA5 receptor axis is involved in the development of LPC-induced impairment of endothelium-dependent vasorelaxation via LPA5 receptor-mediated reactive oxygen species production. Taken together, in this study, we identified a new pathway contributing to the development of LPC-induced endothelial dysfunction.
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Affiliation(s)
- Anna Janovicz
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Aliz Majer
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Mónika Kosztelnik
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Miklós Geiszt
- Department of Physiology, Faculty of Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Jerold Chun
- Translational Neuroscience at Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Satoshi Ishii
- Department of Immunology, Graduate School of Medicine, Akita University, Akita 010-8543, Japan
| | - Gábor József Tigyi
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Zoltán Benyó
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Éva Ruisanchez
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
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Ruisanchez É, Janovicz A, Panta RC, Kiss L, Párkányi A, Straky Z, Korda D, Liliom K, Tigyi G, Benyó Z. Enhancement of Sphingomyelinase-Induced Endothelial Nitric Oxide Synthase-Mediated Vasorelaxation in a Murine Model of Type 2 Diabetes. Int J Mol Sci 2023; 24:ijms24098375. [PMID: 37176081 PMCID: PMC10179569 DOI: 10.3390/ijms24098375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/30/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Sphingolipids are important biological mediators both in health and disease. We investigated the vascular effects of enhanced sphingomyelinase (SMase) activity in a mouse model of type 2 diabetes mellitus (T2DM) to gain an understanding of the signaling pathways involved. Myography was used to measure changes in the tone of the thoracic aorta after administration of 0.2 U/mL neutral SMase in the presence or absence of the thromboxane prostanoid (TP) receptor antagonist SQ 29,548 and the nitric oxide synthase (NOS) inhibitor L-NAME. In precontracted aortic segments of non-diabetic mice, SMase induced transient contraction and subsequent weak relaxation, whereas vessels of diabetic (Leprdb/Leprdb, referred to as db/db) mice showed marked relaxation. In the presence of the TP receptor antagonist, SMase induced enhanced relaxation in both groups, which was 3-fold stronger in the vessels of db/db mice as compared to controls and could not be abolished by ceramidase or sphingosine-kinase inhibitors. Co-administration of the NOS inhibitor L-NAME abolished vasorelaxation in both groups. Our results indicate dual vasoactive effects of SMase: TP-mediated vasoconstriction and NO-mediated vasorelaxation. Surprisingly, in spite of the general endothelial dysfunction in T2DM, the endothelial NOS-mediated vasorelaxant effect of SMase was markedly enhanced.
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Affiliation(s)
- Éva Ruisanchez
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Anna Janovicz
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Rita Cecília Panta
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Levente Kiss
- Department of Physiology, Semmelweis University, H-1094 Budapest, Hungary
| | - Adrienn Párkányi
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Zsuzsa Straky
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Dávid Korda
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Károly Liliom
- Institute of Biophysics and Radiation Biology, Semmelweis University, H-1094 Budapest, Hungary
| | - Gábor Tigyi
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Zoltán Benyó
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
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Vezér M, Jósvai A, Bányai B, Ács N, Keszthelyi M, Soltész-Katona E, Szekeres M, Oláh A, Radovits T, Merkely B, Horváth EM, Nádasy GL, Török M, Várbíró S. Impact of Sex and Exercise on Femoral Artery Function: More Favorable Adaptation in Male Rats. Life (Basel) 2023; 13:life13030778. [PMID: 36983932 PMCID: PMC10058998 DOI: 10.3390/life13030778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/18/2023] Open
Abstract
Blood flow increases in arteries of the skeletal muscles involved in active work. Our aim was to investigate the gender differences as a result of adaptation to sport in the femoral arteries. Vascular reactivity and histology of animals were compared following a 12-week swimming training. Animals were divided into sedentary male (MS), trained male (MTr), sedentary female (FS), and trained female (FTr) groups. Isolated femoral artery rings were examined by wire myography. Contraction induced by phenylephrine (Phe) did not differ between the four groups. The contractile ability in the presence of indomethacin (INDO) was decreased in both sedentary groups. However, we found a specific cyclooxygenase-2 (COX-2) role only in FS rats. After exercise training, we observed increased vasoconstriction in both sexes, when nitro-L-arginine methyl ester (L-NAME) was present. The COX-dependent vasoconstriction effect disappeared in MTr animals, and the COX-2-dependent vasoconstriction effect disappeared in FTr ones. Relaxation was reduced significantly, when L-NAME was present in MTr animals compared to in FTr rats. The training was associated with greater endothelial nitric oxide synthase (eNOS) protein expression in males, but not in females. The present study proves that there are gender differences regarding adaptation mechanisms of musculocutaneous arteries to sports training. In males, relaxation reserve capacity was markedly elevated compared to in females.
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Affiliation(s)
- Márton Vezér
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Attila Jósvai
- Department of Neurosurgery, Military Hospital, Róbert Károly Round 44, 1134 Budapest, Hungary
| | - Bálint Bányai
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
| | - Márton Keszthelyi
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
| | - Eszter Soltész-Katona
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Mária Szekeres
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, Vas Street 17, 1085 Budapest, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Városmajor Street 68, 1085 Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Városmajor Street 68, 1085 Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Városmajor Street 68, 1085 Budapest, Hungary
| | - Eszter M. Horváth
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - György L. Nádasy
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
- Correspondence: (M.T.); (S.V.); Tel.: +36-1-459-1500 (S.V.); Fax: +36-1-333-4934 (S.V.)
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
- Correspondence: (M.T.); (S.V.); Tel.: +36-1-459-1500 (S.V.); Fax: +36-1-333-4934 (S.V.)
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Tarantini S, Balasubramanian P, Delfavero J, Csipo T, Yabluchanskiy A, Kiss T, Nyúl-Tóth Á, Mukli P, Toth P, Ahire C, Ungvari A, Benyo Z, Csiszar A, Ungvari Z. Treatment with the BCL-2/BCL-xL inhibitor senolytic drug ABT263/Navitoclax improves functional hyperemia in aged mice. GeroScience 2021; 43:2427-2440. [PMID: 34427858 PMCID: PMC8599595 DOI: 10.1007/s11357-021-00440-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 08/11/2021] [Indexed: 12/13/2022] Open
Abstract
Moment-to-moment adjustment of regional cerebral blood flow to neuronal activity via neurovascular coupling (NVC or "functional hyperemia") has a critical role in maintenance of healthy cognitive function. Aging-induced impairment of NVC responses importantly contributes to age-related cognitive decline. Advanced aging is associated with increased prevalence of senescent cells in the cerebral microcirculation, but their role in impaired NVC responses remains unexplored. The present study was designed to test the hypothesis that a validated senolytic treatment can improve NVC responses and cognitive performance in aged mice. To achieve this goal, aged (24-month-old) C57BL/6 mice were treated with ABT263/Navitoclax, a potent senolytic agent known to eliminate senescent cells in the aged mouse brain. Mice were behaviorally evaluated (radial arms water maze) and NVC was assessed by measuring CBF responses (laser speckle contrast imaging) in the somatosensory whisker barrel cortex evoked by contralateral whisker stimulation. We found that NVC responses were significantly impaired in aged mice. ABT263/Navitoclax treatment improved NVC response, which was associated with significantly improved hippocampal-encoded functions of learning and memory. ABT263/Navitoclax treatment did not significantly affect endothelium-dependent acetylcholine-induced relaxation of aorta rings. Thus, increased presence of senescent cells in the aged brain likely contributes to age-related neurovascular uncoupling, exacerbating cognitive decline. The neurovascular protective effects of ABT263/Navitoclax treatment highlight the preventive and therapeutic potential of senolytic treatments (as monotherapy or as part of combination treatment regimens) as effective interventions in patients at risk for vascular cognitive impairment (VCI).
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Affiliation(s)
- Stefano Tarantini
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA.
- Peggy and Charles Stephenson Cancer Center, Oklahoma City, OK, 73104, USA.
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary.
| | - Priya Balasubramanian
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
| | - Jordan Delfavero
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
| | - Tamas Csipo
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Andriy Yabluchanskiy
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- Peggy and Charles Stephenson Cancer Center, Oklahoma City, OK, 73104, USA
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Tamas Kiss
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- Department of Pediatrics, University of Szeged, Szeged, Hungary
- First Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Ádám Nyúl-Tóth
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- International Training Program in Geroscience, Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network (ELKH), Szeged, Hungary
| | - Peter Mukli
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Peter Toth
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Department of Neurosurgery, University of Pécs Clinical Center, Pecs, Hungary
- MTA-PTE Clinical Neuroscience MR Research Group, Pecs, Hungary
| | - Chetan Ahire
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
| | - Anna Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
| | - Zoltan Benyo
- International Training Program in Geroscience/Vascular Cognitive Impairment and Neurodegeneration Program, Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Anna Csiszar
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- Peggy and Charles Stephenson Cancer Center, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience/Vascular Cognitive Impairment and Neurodegeneration Program, Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Zoltan Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 731042, USA
- Peggy and Charles Stephenson Cancer Center, Oklahoma City, OK, 73104, USA
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
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7
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Csipo T, Cassidy BR, Balasubramanian P, Drevets DA, Ungvari ZI, Yabluchanskiy A. Endothelial Dysfunction and Impaired Neurovascular Coupling Responses Precede Cognitive Impairment in a Mouse Model of Geriatric Sepsis. Front Aging Neurosci 2021; 13:644733. [PMID: 34054502 PMCID: PMC8160114 DOI: 10.3389/fnagi.2021.644733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 04/19/2021] [Indexed: 12/31/2022] Open
Abstract
Sepsis is a life-threatening condition, the incidence of which is significantly increased in elderly patients. One of the long-lasting effects of sepsis is cognitive impairment defined as a new deficit or exacerbation of preexisting deficits in global cognition or executive function. Normal brain function is dependent on moment-to-moment adjustment of cerebral blood flow to match the increased demands of active brain regions. This homeostatic mechanism, termed neurovascular coupling (NVC, also known as functional hyperemia), is critically dependent on the production of vasodilator NO by microvascular endothelial cells in response to mediators released from activated astrocytes. The goal of this study was to test the hypothesis that sepsis in aging leads to impairment of NVC responses early after treatment and that this neurovascular dysfunction associates with impairments in cognitive performance and vascular endothelial dysfunction. To test this hypothesis, we used a commonly studied bacterial pathogen, Listeria monocytogenes, to induce sepsis in experimental animals (males, 24 months of age) and subjected experimental animals to a standard clinical protocol of 3 doses of ampicillin i.p. and 14 days of amoxicillin added to the drinking water. NVC responses, endothelial function and cognitive performance were measured in septic and age-matched control groups within 14 days after the final antibiotic treatment. Our data demonstrate that sepsis in aging significantly impairs NVC responses measured in somatosensory cortex during whisker stimulation, significantly impairs endothelial function in isolated and pressure cannulated aorta rings in response to acetylcholine stimulation. No significant impairment of cognitive function in post-sepsis aged animals has been observed when measured using the PhenoTyper homecage based system. Our findings suggest that sepsis-associated endothelial dysfunction and impairment of NVC responses may contribute to long-term cognitive deficits in older sepsis survivors.
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Affiliation(s)
- Tamas Csipo
- Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- International Training Program in Geroscience, Department of Public Health, Doctoral School of Basic and Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Benjamin R. Cassidy
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Priya Balasubramanian
- Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Douglas A. Drevets
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- Department of Veterans Affairs Medical Center, Oklahoma City, OK, United States
| | - Zoltan I. Ungvari
- Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- International Training Program in Geroscience, Departments of Medical Physics and Informatics, Theoretical Medicine Doctoral School University of Szeged, Szeged, Hungary
| | - Andriy Yabluchanskiy
- Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
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8
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Panta CR, Ruisanchez É, Móré D, Dancs PT, Balogh A, Fülöp Á, Kerék M, Proia RL, Offermanns S, Tigyi GJ, Benyó Z. Sphingosine-1-Phosphate Enhances α 1-Adrenergic Vasoconstriction via S1P2-G 12/13-ROCK Mediated Signaling. Int J Mol Sci 2019; 20:ijms20246361. [PMID: 31861195 PMCID: PMC6941080 DOI: 10.3390/ijms20246361] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/04/2019] [Accepted: 12/13/2019] [Indexed: 01/21/2023] Open
Abstract
Sphingosine-1-phosphate (S1P) has been implicated recently in the physiology and pathology of the cardiovascular system including regulation of vascular tone. Pilot experiments showed that the vasoconstrictor effect of S1P was enhanced markedly in the presence of phenylephrine (PE). Based on this observation, we hypothesized that S1P might modulate α1-adrenergic vasoactivity. In murine aortas, a 20-minute exposure to S1P but not to its vehicle increased the Emax and decreased the EC50 of PE-induced contractions indicating a hyperreactivity to α1-adrenergic stimulation. The potentiating effect of S1P disappeared in S1P2 but not in S1P3 receptor-deficient vessels. In addition, smooth muscle specific conditional deletion of G12/13 proteins or pharmacological inhibition of the Rho-associated protein kinase (ROCK) by Y-27632 or fasudil abolished the effect of S1P on α1-adrenergic vasoconstriction. Unexpectedly, PE-induced contractions remained enhanced markedly as late as three hours after S1P-exposure in wild-type (WT) and S1P3 KO but not in S1P2 KO vessels. In conclusion, the S1P–S1P2–G12/13–ROCK signaling pathway appears to have a major influence on α1-adrenergic vasoactivity. This cooperativity might lead to sustained vasoconstriction when increased sympathetic tone is accompanied by increased S1P production as it occurs during acute coronary syndrome and stroke.
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Affiliation(s)
- Cecília R. Panta
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
- Correspondence: (C.R.P.); (Z.B.)
| | - Éva Ruisanchez
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
| | - Dorottya Móré
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
| | - Péter T. Dancs
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
| | - Andrea Balogh
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
| | - Ágnes Fülöp
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
| | - Margit Kerék
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
| | - Richard L. Proia
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), Bethesda, MD 20892, USA;
| | - Stefan Offermanns
- Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany;
| | - Gábor J. Tigyi
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Zoltán Benyó
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary (D.M.); (P.T.D.); (A.B.); (M.K.); (G.J.T.)
- Correspondence: (C.R.P.); (Z.B.)
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9
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Tarantini S, Yabluchanskiy A, Csipo T, Fulop G, Kiss T, Balasubramanian P, DelFavero J, Ahire C, Ungvari A, Nyúl-Tóth Á, Farkas E, Benyo Z, Tóth A, Csiszar A, Ungvari Z. Treatment with the poly(ADP-ribose) polymerase inhibitor PJ-34 improves cerebromicrovascular endothelial function, neurovascular coupling responses and cognitive performance in aged mice, supporting the NAD+ depletion hypothesis of neurovascular aging. GeroScience 2019; 41:533-542. [PMID: 31679124 PMCID: PMC6885075 DOI: 10.1007/s11357-019-00101-2] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 09/10/2019] [Indexed: 01/12/2023] Open
Abstract
Adjustment of cerebral blood flow (CBF) to neuronal activity via neurovascular coupling (NVC) plays an important role in the maintenance of healthy cognitive function. Strong evidence demonstrates that age-related cerebromicrovascular endothelial dysfunction and consequential impairment of NVC responses contribute importantly to cognitive decline. Recent studies demonstrate that NAD+ availability decreases with age in the vasculature and that supplemental NAD+ precursors can ameliorate cerebrovascular dysfunction, rescuing NVC responses and improving cognitive performance in aged mice. The mechanisms underlying the age-related decline in [NAD+] in cells of the neurovascular unit are likely multifaceted and may include increased utilization of NAD+ by activated poly (ADP-ribose) polymerase (PARP-1). The present study was designed to test the hypothesis that inhibition of PARP-1 activity may confer protective effects on neurovascular function in aging, similar to the recently demonstrated protective effects of treatment with the NAD+ precursor nicotinamide mononucleotide (NMN). To test this hypothesis, 24-month-old C57BL/6 mice were treated with PJ-34, a potent PARP inhibitor, for 2 weeks. NVC was assessed by measuring CBF responses (laser speckle contrast imaging) in the somatosensory whisker barrel cortex evoked by contralateral whisker stimulation. We found that NVC responses were significantly impaired in aged mice. Treatment with PJ-34 improved NVC responses by increasing endothelial NO-mediated vasodilation, which was associated with significantly improved spatial working memory. PJ-34 treatment also improved endothelium-dependent acetylcholine-induced relaxation of aorta rings. Thus, PARP-1 activation, likely by decreasing NAD+ availability, contributes to age-related endothelial dysfunction and neurovascular uncoupling, exacerbating cognitive decline. The cerebromicrovascular protective effects of pharmacological inhibition of PARP-1 highlight the preventive and therapeutic potential of treatments that restore NAD+ homeostasis as effective interventions in patients at risk for vascular cognitive impairment (VCI).
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Affiliation(s)
- Stefano Tarantini
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Department of Public Health/Doctoral School of Basic and Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Andriy Yabluchanskiy
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
| | - Tamas Csipo
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Department of Public Health/Doctoral School of Basic and Translational Medicine, Semmelweis University, Budapest, Hungary
- International Training Program in Geroscience, Division of Clinical Physiology, Faculty of Medicine, Research Center for Molecular Medicine, University of Debrecen, Debrecen, Hungary
| | - Gabor Fulop
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Division of Clinical Physiology, Faculty of Medicine, Research Center for Molecular Medicine, University of Debrecen, Debrecen, Hungary
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Tamas Kiss
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Department of Medical Physics and Informatics/Theoretical Medicine Doctoral School, University of Szeged, Szeged, Hungary
| | - Priya Balasubramanian
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
| | - Jordan DelFavero
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
| | - Chetan Ahire
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
| | - Anna Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
| | - Ádám Nyúl-Tóth
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Eszter Farkas
- International Training Program in Geroscience, Department of Medical Physics and Informatics/Theoretical Medicine Doctoral School, University of Szeged, Szeged, Hungary
| | - Zoltan Benyo
- Institute of Clinical Experimental Research/Doctoral School of Basic and Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Attila Tóth
- International Training Program in Geroscience, Division of Clinical Physiology, Faculty of Medicine, Research Center for Molecular Medicine, University of Debrecen, Debrecen, Hungary
| | - Anna Csiszar
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- Institute of Clinical Experimental Research/Doctoral School of Basic and Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Zoltan Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA.
- International Training Program in Geroscience, Department of Public Health/Doctoral School of Basic and Translational Medicine, Semmelweis University, Budapest, Hungary.
- International Training Program in Geroscience, Department of Medical Physics and Informatics/Theoretical Medicine Doctoral School, University of Szeged, Szeged, Hungary.
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
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10
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Elevated Plasma Levels of LDL Cholesterol Promote Dissecting Thoracic Aortic Aneurysms in Angiotensin II-Induced Mice. Ann Vasc Surg 2017; 48:204-213. [PMID: 29197606 DOI: 10.1016/j.avsg.2017.10.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 10/13/2017] [Accepted: 10/15/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Plasma low-density lipoprotein (LDL) cholesterol is implicated in abdominal aorta (AA) and aortic dissection (AD); however, its role in the pathogenesis of AA and AD, a disease with a high mortality rate, is unknown. The existing animal models such as apolipoprotein E-deficient (Apoe-/-) mice cannot reproduce all the conditions of AA/AD, including elevated LDL-cholesterol levels and spontaneous atheroma formation; therefore, a more reliable in vivo model is required. Here, we analyzed angiotensin II (Ang II)-induced mice with combined deficiency of the LDL receptor and the catalytic component of the apolipoprotein B-edisome complex (Ldlr-/-/Apobec1-/- [WKO]) to understand AA formation and AD occurrence in relation to plasma lipid composition. METHODS AAs and ADs were created in 18- to 22- week-old male Apoe-/- and Ldlr-/-/Apobec1-/- mice by Ang II infusion. Immunostaining allowed assessment of smooth muscle cells and mural monocytes/macrophages. RESULTS Ldlr-/-/Apobec1-/- mice had elevated LDL-cholesterol levels characteristic for human type IIa hyperlipidemia, resulting in atherogenesis, which promoted mortality, AA formation, and AD development. Interestingly, variations in the distribution of atheromas and inflammatory sites between Apoe-/- and Ldlr-/-/Apobec1-/- mice depending on lipid profiles resulted in differences in AA formation and AD occurrence in the thoracic aorta. CONCLUSIONS Our results indicate the presence of a pathogenic pathway involving serum lipid composition that plays a key role in AA formation and AD occurrence in Ang II-induced mice.
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11
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Dancs PT, Ruisanchez É, Balogh A, Panta CR, Miklós Z, Nüsing RM, Aoki J, Chun J, Offermanns S, Tigyi G, Benyó Z. LPA 1 receptor-mediated thromboxane A 2 release is responsible for lysophosphatidic acid-induced vascular smooth muscle contraction. FASEB J 2017; 31:1547-1555. [PMID: 28069828 DOI: 10.1096/fj.201600735r] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 12/19/2016] [Indexed: 02/05/2023]
Abstract
Lysophosphatidic acid (LPA) has been recognized recently as an endothelium-dependent vasodilator, but several lines of evidence indicate that it may also stimulate vascular smooth muscle cells (VSMCs), thereby contributing to vasoregulation and remodeling. In the present study, mRNA expression of all 6 LPA receptor genes was detected in murine aortic VSMCs, with the highest levels of LPA1, LPA2, LPA4, and LPA6 In endothelium-denuded thoracic aorta (TA) and abdominal aorta (AA) segments, 1-oleoyl-LPA and the LPA1-3 agonist VPC31143 induced dose-dependent vasoconstriction. VPC31143-induced AA contraction was sensitive to pertussis toxin (PTX), the LPA1&3 antagonist Ki16425, and genetic deletion of LPA1 but not that of LPA2 or inhibition of LPA3, by diacylglycerol pyrophosphate. Surprisingly, vasoconstriction was also diminished in vessels lacking cyclooxygenase-1 [COX1 knockout (KO)] or the thromboxane prostanoid (TP) receptor (TP KO). VPC31143 increased thromboxane A2 (TXA2) release from TA of wild-type, TP-KO, and LPA2-KO mice but not from LPA1-KO or COX1-KO mice, and PTX blocked this effect. Our findings indicate that LPA causes vasoconstriction in VSMCs, mediated by LPA1-, Gi-, and COX1-dependent autocrine/paracrine TXA2 release and consequent TP activation. We propose that this new-found interaction between the LPA/LPA1 and TXA2/TP pathways plays significant roles in vasoregulation, hemostasis, thrombosis, and vascular remodeling.-Dancs, P. T., Ruisanchez, E., Balogh, A., Panta, C. R., Miklós, Z., Nüsing, R. M., Aoki, J., Chun, J., Offermanns, S., Tigyi, G., Benyó, Z. LPA1 receptor-mediated thromboxane A2 release is responsible for lysophosphatidic acid-induced vascular smooth muscle contraction.
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Affiliation(s)
- Péter Tibor Dancs
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Éva Ruisanchez
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Andrea Balogh
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Cecília Rita Panta
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Zsuzsanna Miklós
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Rolf M Nüsing
- Institute of Clinical Pharmacology, Goethe University, Frankfurt, Germany
| | - Junken Aoki
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Jerold Chun
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA; and
| | - Stefan Offermanns
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Gábor Tigyi
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee, USA;
| | - Zoltán Benyó
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary;
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12
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Krishnan M, Janardhanan P, Roman L, Reddick RL, Natarajan M, van Haperen R, Habib SL, de Crom R, Mohan S. Enhancing eNOS activity with simultaneous inhibition of IKKβ restores vascular function in Ins2(Akita+/-) type-1 diabetic mice. J Transl Med 2015; 95:1092-104. [PMID: 26214584 DOI: 10.1038/labinvest.2015.96] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 04/24/2015] [Accepted: 05/28/2015] [Indexed: 12/13/2022] Open
Abstract
The balance of nitric oxide (NO) versus superoxide generation has a major role in the initiation and progression of endothelial dysfunction. Under conditions of high glucose, endothelial nitric oxide synthase (eNOS) functions as a chief source of superoxide rather than NO. In order to improve NO bioavailability within the vessel wall in type-1 diabetes, we investigated treatment strategies that improve eNOS phosphorylation and NO-dependent vasorelaxation. We evaluated methods to increase the eNOS activity by (1) feeding Ins2(Akita) spontaneously diabetic (type-1) mice with l-arginine in the presence of sepiapterin, a precursor of tetrahydrobiopterin; (2) preventing eNOS/NO deregulation by the inclusion of inhibitor kappa B kinase beta (IKKβ) inhibitor, salsalate, in the diet regimen in combination with l-arginine and sepiapterin; and (3) independently increasing eNOS expression to improve eNOS activity and associated NO production through generating Ins2(Akita) diabetic mice that overexpress human eNOS predominantly in vascular endothelial cells. Our results clearly demonstrated that diet supplementation with l-arginine, sepiapterin along with salsalate improved phosphorylation of eNOS and enhanced vasorelaxation of thoracic/abdominal aorta in type-1 diabetic mice. More interestingly, despite the overexpression of eNOS, the in-house generated transgenic eNOS-GFP (TgeNOS-GFP)-Ins2(Akita) cross mice showed an unanticipated effect of reduced eNOS phosphorylation and enhanced superoxide production. Our results demonstrate that enhancement of endogenous eNOS activity by nutritional modulation is more beneficial than increasing the endogenous expression of eNOS by gene therapy modalities.
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Affiliation(s)
- Manickam Krishnan
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Preethi Janardhanan
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Linda Roman
- Department of Biochemistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Robert L Reddick
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Mohan Natarajan
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Rien van Haperen
- Department of Cell Biology and Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Samy L Habib
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Rini de Crom
- Department of Cell Biology and Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Sumathy Mohan
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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13
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Szekeres M, Nádasy GL, Turu G, Soltész-Katona E, Benyó Z, Offermanns S, Ruisanchez É, Szabó E, Takáts Z, Bátkai S, Tóth ZE, Hunyady L. Endocannabinoid-mediated modulation of Gq/11 protein-coupled receptor signaling-induced vasoconstriction and hypertension. Mol Cell Endocrinol 2015; 403:46-56. [PMID: 25595485 DOI: 10.1016/j.mce.2015.01.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 12/19/2014] [Accepted: 01/08/2015] [Indexed: 12/31/2022]
Abstract
Activation of G protein-coupled receptors (GPCRs) can induce vasoconstriction via calcium signal-mediated and Rho-dependent pathways. Earlier reports have shown that diacylglycerol produced during calcium signal generation can be converted to an endocannabinoid, 2-arachidonoylglycerol (2-AG). Our aim was to provide evidence that GPCR signaling-induced 2-AG production and activation of vascular type1 cannabinoid receptors (CB1R) is capable of reducing agonist-induced vasoconstriction and hypertension. Rat and mouse aortic rings were examined by myography. Vascular expression of CB1R was demonstrated with immunohistochemistry. Rat aortic vascular smooth muscle cells (VSMCs) were cultured for calcium measurements and 2-AG-determination. Inhibition or genetic loss of CB1Rs enhanced vasoconstriction induced by angiotensin II (AngII) or phenylephrine (Phe), but not by prostaglandin(PG)F2α. AngII-induced vasoconstriction was augmented by inhibition of diacylglycerol lipase (tetrahydrolipstatin) and was attenuated by inhibition of monoacylglycerol lipase (JZL184) suggesting a functionally relevant role for endogenously produced 2-AG. In Gαq/11-deficient mice vasoconstriction was absent to AngII or Phe, which activate Gq/11-coupled receptors, but was maintained in response to PGF2α. In VSMCs, AngII-stimulated 2-AG-formation was inhibited by tetrahydrolipstatin and potentiated by JZL184. CB1R inhibition increased the sustained phase of AngII-induced calcium signal. Pharmacological or genetic loss of CB1R function augmented AngII-induced blood pressure rise in mice. These data demonstrate that vasoconstrictor effect of GPCR agonists is attenuated via Gq/11-mediated vascular endocannabinoid formation. Agonist-induced endocannabinoid-mediated CB1R activation is a significant physiological modulator of vascular tone. Thus, the selective modulation of GPCR signaling-induced endocannabinoid release has a therapeutic potential in case of increased vascular tone and hypertension.
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MESH Headings
- Angiotensin II/pharmacology
- Animals
- Aorta/drug effects
- Arachidonic Acids/pharmacology
- Benzodioxoles/pharmacology
- Calcium/metabolism
- Calcium Signaling
- Dinoprost/pharmacology
- Endocannabinoids/pharmacology
- GTP-Binding Protein alpha Subunits, Gq-G11/deficiency
- GTP-Binding Protein alpha Subunits, Gq-G11/genetics
- Gene Expression Regulation
- Glycerides/pharmacology
- Hypertension/drug therapy
- Hypertension/genetics
- Hypertension/metabolism
- Hypertension/physiopathology
- Lactones/pharmacology
- Lipoprotein Lipase/antagonists & inhibitors
- Lipoprotein Lipase/genetics
- Lipoprotein Lipase/metabolism
- Male
- Mice
- Mice, Knockout
- Monoacylglycerol Lipases/antagonists & inhibitors
- Monoacylglycerol Lipases/genetics
- Monoacylglycerol Lipases/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/cytology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Orlistat
- Phenylephrine/pharmacology
- Piperidines/pharmacology
- Rats
- Rats, Wistar
- Receptor, Cannabinoid, CB1/antagonists & inhibitors
- Receptor, Cannabinoid, CB1/genetics
- Receptor, Cannabinoid, CB1/metabolism
- Tissue Culture Techniques
- Vasoconstriction/drug effects
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Affiliation(s)
- Mária Szekeres
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - György L Nádasy
- Institute of Human Physiology and Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Gábor Turu
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | | | - Zoltán Benyó
- Institute of Human Physiology and Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Stefan Offermanns
- Department of Pharmacology, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Éva Ruisanchez
- Institute of Human Physiology and Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Eszter Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Zoltán Takáts
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Sándor Bátkai
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
| | - Zsuzsanna E Tóth
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - László Hunyady
- Department of Physiology, Semmelweis University, Budapest, Hungary; MTA-SE Laboratory of Molecular Physiology, Budapest, Hungary.
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14
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del Campo L, Ferrer M. Wire Myography to Study Vascular Tone and Vascular Structure of Isolated Mouse Arteries. Methods Mol Biol 2015; 1339:255-276. [PMID: 26445795 DOI: 10.1007/978-1-4939-2929-0_18] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Atherosclerosis is characterized by endothelial dysfunction and alterations in vascular reactivity, which can be investigated by wire myography. The method allows ex vivo monitoring of the transversal isometric tension developed by a vessel segment in response to different pathophysiological stimuli. Here we describe in detail how to use the wire myograph to evaluate endothelial function and vasoconstrictor or vasodilator properties of the vessel, as well as to identify and characterize different factors and molecular pathways that control vascular tone. We also describe how to use the wire myograph to analyze biomechanical and passive properties of vessels such as diameter and elasticity.
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Affiliation(s)
- Lara del Campo
- Laboratory of Molecular and Genetic Cardiovascular Pathophysiology, Vascular Biology Program, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Melchor Fernández Almagro 3, 28029, Madrid, Spain.
| | - Mercedes Ferrer
- Department of Physiology, Faculty of Medicine, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, 28029, Madrid, Spain
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15
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Prendergast C, Quayle J, Burdyga T, Wray S. Atherosclerosis differentially affects calcium signalling in endothelial cells from aortic arch and thoracic aorta in Apolipoprotein E knockout mice. Physiol Rep 2014; 2:2/10/e12171. [PMID: 25344475 PMCID: PMC4254096 DOI: 10.14814/phy2.12171] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Apolipoprotein‐E knockout (ApoE−/−) mice develop hypercholesterolemia and are a useful model of atherosclerosis. Hypercholesterolemia alters intracellular Ca2+ signalling in vascular endothelial cells but our understanding of these changes, especially in the early stages of the disease process, is limited. We therefore determined whether carbachol‐mediated endothelial Ca2+ signals differ in plaque‐prone aortic arch compared to plaque‐resistant thoracic aorta, of wild‐type and ApoE−/− mice, and how this is affected by age and the presence of hypercholesterolemia. The extent of plaque development was determined using en‐face staining with Sudan IV. Tissues were obtained from wild‐type and ApoE−/− mice at 10 weeks (pre‐plaques) and 24 weeks (established plaques). We found that even before development of plaques, significantly increased Ca2+ responses were observed in arch endothelial cells. Even with aging and plaque formation, ApoE−/− thoracic responses were little changed, however a significantly enhanced Ca2+ response was observed in arch, both adjacent to and away from lesions. In wild‐type mice of any age, 1–2% of cells had oscillatory Ca2+ responses. In young ApoE−/− and plaque‐free regions of older ApoE−/−, this is unchanged. However a significant increase in oscillations (~13–15%) occurred in thoracic and arch cells adjacent to lesions in older mice. Our data suggest that Ca2+ signals in endothelial cells show specific changes both before and with plaque formation, that these changes are greatest in plaque‐prone aortic arch cells, and that these changes will contribute to the reported deterioration of endothelium in atherosclerosis. We have investigated aortic endothelial cell calcium signalling changes in the Apolipoprotein E knockout mouse model of atherosclerosis. Our data show that calcium signals in endothelial cells undergo specific changes both before and with plaque formation, that these changes are greater in plaque‐prone aortic arch than in plaque‐resistant thoracic aorta, and that these changes will contribute to the reported deterioration of endothelium in atherosclerosis.
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Affiliation(s)
- Clodagh Prendergast
- Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - John Quayle
- Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Theodor Burdyga
- Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Susan Wray
- Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
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16
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Szijártó IA, Molnár GA, Mikolás E, Fisi V, Laczy B, Gollasch M, Koller A, Wittmann I. Increase in insulin-induced relaxation of consecutive arterial segments toward the periphery: Role of vascular oxidative state. Free Radic Res 2014; 48:749-57. [PMID: 24628420 DOI: 10.3109/10715762.2014.904507] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
RATIONALE The oxidative state has been implicated in the signaling of various vasomotor functions, yet its role regarding the vasomotor action of insulin is less known. OBJECTIVE To investigate the insulin-evoked relaxations of consecutive arterial segments of different oxidative state and the role of extracellular signal-regulated kinase (ERK) pathway. METHODS AND RESULTS The oxidative state, as assessed by the level of ortho-tyrosine, was higher in the thoracic aorta of rats than in the abdominal aorta, and was the lowest in the femoral artery. The vasomotor function of vessels of same origin was studied using a small-vessel myograph. Insulin-induced relaxations increased toward the periphery (i.e., thoracic < abdominal < femoral). Aortic banding and hydrogen peroxide/aminotriazole increased the oxidative state of the thoracic aorta that was accompanied by ERK activation and decreased relaxation to insulin, and vice versa, acutely lowered oxidative state by superoxide dismutase/catalase improved relaxation. In contrast, insulin-induced relaxation of the femoral artery could be enhanced with a higher oxidative state, and reduced with a lower state. CONCLUSIONS Oxidative state of vessels modulates the magnitude of vasomotor responses to insulin, which appears to be mediated via the ERK signaling pathway.
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Affiliation(s)
- I A Szijártó
- 2nd Department of Medicine and Nephrological Center, University of Pécs , Pécs , Hungary
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17
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Masszi G, Novak A, Tarszabo R, Horvath EM, Buday A, Ruisanchez E, Tokes AM, Sara L, Benko R, Nadasy GL, Revesz C, Hamar P, Benyó Z, Varbiro S. Effects of vitamin D3 derivative--calcitriol on pharmacological reactivity of aortic rings in a rodent PCOS model. Pharmacol Rep 2014; 65:476-83. [PMID: 23744432 DOI: 10.1016/s1734-1140(13)71023-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 11/16/2012] [Indexed: 11/30/2022]
Abstract
BACKGROUND The aim of this study was to examine the effects of the hyperandrogenic state in dihydrotestosterone (DHT)-induced polycystic ovary syndrome (PCOS), the vascular responses to different vasoactive agents, and the modulatory role of vitamin D3. METHODS APCOS model was induced by DHT application in 20 female Wistar rats. Ten of the DHT treated rats simultaneously received calcitriol treatment. After 10 weeks, myographs were used to test the reactivity of isolated thoracic aortic rings to norepinephrine and acetylcholine. Thereafter, the vascular rings were incubated with the NO-synthase blocker (nitro-L-arginine methyl ester) or the cyclooxygenase inhibitor (indomethacin) for 20 min, and the effects of norepinephrine and acetylcholine were re-evaluated. RESULTS Norepinephrine-induced vasoconstriction was enhanced after DHT treatment, but this effect was attenuated by calcitriol administration. Vasorelaxation of DHT-treated thoracic aortic rings was impaired, but this could be partly reversed by calcitriol application. Impaired NO-dependent vasorelaxation in DHT-treated animals was mostly reversed by concomitant calcitriol administration, but this effect was diminished by prostanoid-dependent vasoconstriction. CONCLUSIONS These studies show that the enhanced sensitivity to vasoconstrictors and impaired NO-dependent vasorelaxation in hyperandrogenic PCOS rats could be partially reversed by calcitriol treatment.
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Affiliation(s)
- Gabriella Masszi
- Department of Cardiology, Bajcsy Zs Hospital, Maglodi St 89-91, H-1106 Budapest, Hungary
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18
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Ruisanchez É, Dancs P, Kerék M, Németh T, Faragó B, Balogh A, Patil R, Jennings BL, Liliom K, Malik KU, Smrcka AV, Tigyi G, Benyó Z. Lysophosphatidic acid induces vasodilation mediated by LPA1 receptors, phospholipase C, and endothelial nitric oxide synthase. FASEB J 2013; 28:880-90. [PMID: 24249637 DOI: 10.1096/fj.13-234997] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Lysophosphatidic acid (LPA) has been implicated as a mediator of several cardiovascular functions, but its potential involvement in the control of vascular tone is obscure. Here, we show that both LPA (18:1) and VPC31143 (a synthetic agonist of LPA1-3 receptors) relax intact mouse thoracic aorta with similar Emax values (53.9 and 51.9% of phenylephrine-induced precontraction), although the EC50 of LPA- and VPC31143-induced vasorelaxations were different (400 vs. 15 nM, respectively). Mechanical removal of the endothelium or genetic deletion of endothelial nitric oxide synthase (eNOS) not only diminished vasorelaxation by LPA or VPC31143 but converted it to vasoconstriction. Freshly isolated mouse aortic endothelial cells expressed LPA1, LPA2, LPA4 and LPA5 transcripts. The LPA1,3 antagonist Ki16425, the LPA1 antagonist AM095, and the genetic deletion of LPA1, but not that of LPA2, abolished LPA-induced vasorelaxation. Inhibition of the phosphoinositide 3 kinase-protein kinase B/Akt pathway by wortmannin or MK-2206 failed to influence the effect of LPA. However, pharmacological inhibition of phospholipase C (PLC) by U73122 or edelfosine, but not genetic deletion of PLCε, abolished LPA-induced vasorelaxation and indicated that a PLC enzyme, other than PLCε, mediates the response. In summary, the present study identifies LPA as an endothelium-dependent vasodilator substance acting via LPA1, PLC, and eNOS.
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Affiliation(s)
- Éva Ruisanchez
- 1Z.B., Institute of Human Physiology and Clinical Experimental Research, Semmelweis University, POB 448, H-1446 Budapest, Hungary.
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19
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Masszi G, Buday A, Novak A, Horvath EM, Tarszabo R, Sara L, Revesz C, Benko R, Nadasy GL, Benyó Z, Hamar P, Varbiro S. Altered insulin-induced relaxation of aortic rings in a dihydrotestosterone-induced rodent model of polycystic ovary syndrome. Fertil Steril 2012; 99:573-8. [PMID: 23058684 DOI: 10.1016/j.fertnstert.2012.09.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 09/09/2012] [Accepted: 09/18/2012] [Indexed: 01/22/2023]
Abstract
OBJECTIVE To clarify the effects of dihydrotestosterone (DHT)-induced polycystic ovary syndrome (PCOS) on the insulin-dependent vasodilatation of the thoracic aorta and the role of vitamin D in a rat model. DESIGN Controlled experimental animal study. SETTING Laboratory. ANIMAL(S) Thirty adolescent female Wistar rats. INTERVENTION(S) The PCOS model was induced by 10 weeks of DHT treatment (83 μg/d). One-half of the DHT-treated animals also received vitamin D (120 ng/kg/wk). MAIN OUTCOME MEASURE(S) The aortic rings of the control, DHT, and DHT plus vitamin D-treated animals were isolated. The insulin-dependent vasodilation of the isolated aortic rings was compared in Krebs-Ringer solution and under blockade of nitric oxide (NO) synthase or cyclooxygenase. RESULT(S) The insulin-dependent vasorelaxation decreased in both DHT-treated groups independently from the vitamin D treatment; NO-dependent and -independent relaxations were both impaired. In response to prostanoid, vasoconstriction was increased after DHT treatment. The NO-independent relaxation was partially improved by vitamin D treatment, which was neutralized by increased prostanoid-dependent vasoconstriction. CONCLUSION(S) Previously, we found that vitamin D treatment prevented systemic insulin resistance; however, in this study, we did not detect any influence on the vascular insulin resistance of the aorta that was induced by DHT treatment. Consequently, controlling insulin resistance with vitamin D alone did not resolve the aortic endothelial dysfunction caused by the hyperandrogenic state.
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Affiliation(s)
- Gabriella Masszi
- Department of Cardiology, Bajcsy Zs. Hospital, Budapest, Hungary
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20
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Carbachol inhibits TNF-α-induced endothelial barrier dysfunction through alpha 7 nicotinic receptors. Acta Pharmacol Sin 2010; 31:1389-94. [PMID: 20871620 DOI: 10.1038/aps.2010.165] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
AIM To test whether carbachol can influence endothelial barrier dysfunction induced by tumor necrosis factor (TNF)-α and whether the alpha 7 nicotinic receptor can mediate this process. METHODS Rat cardiac microvascular endothelial cells were exposed to carbachol followed by TNF-α treatment in the presence or the absence of α-bungarotoxin (an antagonist of the alpha 7 nicotinic receptor). Permeability of endothelial cells cultured on Transwell filters was assayed using FITC-albumin. F-actin was stained with FITC- phalloidin. Expression of vascular endothelial cadherin, intercellular adhesion molecule 1 (ICAM-1), phosphor-ERK1/2 and phosphor-JNK was detected using Western blot. RESULTS Carbachol (2 μmol/L-2 mmol/L) prevented increase in endothelial cell permeability induced by TNF-α (500 ng/mL) in a dose-dependent manner. Further, it attenuated the down-regulation of vascular endothelial cadherin and the up-regulation of ICAM-1 induced by TNF-α. In addition, treatment of endothelial cells with carbachol decreased phosphor-ERK1/2 and phosphor-JNK. These effects of carbachol were blocked by α-bungarotoxin 3 μg/mL. CONCLUSION These data suggest that the inhibitory effect of carbachol on TNF-α-induced endothelial barrier dysfunction mediated by the alpha 7 nicotinic receptor.
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21
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Buday A, Orsy P, Godó M, Mózes M, Kökény G, Lacza Z, Koller A, Ungvári Z, Gross ML, Benyó Z, Hamar P. Elevated systemic TGF-beta impairs aortic vasomotor function through activation of NADPH oxidase-driven superoxide production and leads to hypertension, myocardial remodeling, and increased plaque formation in apoE(-/-) mice. Am J Physiol Heart Circ Physiol 2010; 299:H386-95. [PMID: 20511416 DOI: 10.1152/ajpheart.01042.2009] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The role of circulating, systemic TGF-beta levels in endothelial function is not clear. TGF-beta(1) may cause endothelial dysfunction in apolipoprotein E-deficient (apoE(-/-)) mice via stimulation of reactive oxygen species (ROS) production by the NADPH oxidase (NOX) system and aggravate aortic and heart remodeling and hypertension. Thoracic aorta (TA) were isolated from 4-mo-old control (C57Bl/6), apoE(-/-), TGF-beta(1)-overexpressing (TGFbeta(1)), and crossbred apoE(-/-) x TGFbeta(1) mice. Endothelium-dependent relaxation was measured before and after incubation with apocynin (NOX inhibitor) or superoxide dismutase (SOD; ROS scavenger). Superoxide production within the vessel wall was determined by dihydroethidine staining under confocal microscope. In 8-mo-old mice, aortic and myocardial morphometric changes, plaque formation by en face fat staining, and blood pressure were determined. Serum TGF-beta(1) levels (ELISA) were elevated in TGFbeta(1) mice without downregulation of TGF-beta-I receptor (immunohistochemistry). In the aortic wall, superoxide production was enhanced and NO-dependent relaxation diminished in apoE(-/-) x TGFbeta(1) mice but improved significantly after apocynin or SOD. Myocardial capillary density was reduced, fibrocyte density increased, aortic wall was thicker, combined lesion area was greater, and blood pressure was higher in the apoE(-/-) x TGFbeta vs. C57Bl/6 mice. Our results demonstrate that elevated circulating TGF-beta(1) causes endothelial dysfunction through NOX activation-induced oxidative stress, accelerating atherosclerosis and hypertension in apoE(-/-) mice. These findings may provide a mechanism explaining accelerated atherosclerosis in patients with elevated plasma TGFbeta(1).
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Affiliation(s)
- Anna Buday
- Institute of Pathophysiology, Dept. of Medicine, Semmelweis Univ., Budapest, 1089 Nagyvárad tér 4, Hungary
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22
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Boittin FX, Gribi F, Serir K, Bény JL. Ca2+-independent PLA2 controls endothelial store-operated Ca2+ entry and vascular tone in intact aorta. Am J Physiol Heart Circ Physiol 2008; 295:H2466-74. [PMID: 18952717 DOI: 10.1152/ajpheart.00639.2008] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
During an agonist stimulation of endothelial cells, the sustained Ca2+ entry occurring through store-operated channels has been shown to significantly contribute to smooth muscle relaxation through the release of relaxing factors such as nitric oxide (NO). However, the mechanisms linking Ca2+ stores depletion to the opening of such channels are still elusive. We have used Ca2+ and tension measurements in intact aortic strips to investigate the role of the Ca2+-independent isoform of phospholipase A2 (iPLA2) in endothelial store-operated Ca2+ entry and endothelium-dependent relaxation of smooth muscle. We provide evidence that iPLA2 is involved in the activation of endothelial store-operated Ca2+ entry when Ca2+ stores are artificially depleted. We also show that the sustained store-operated Ca2+ entry occurring during physiological stimulation of endothelial cells with the circulating hormone ATP is due to iPLA2 activation and significantly contributes to the amplitude and duration of ATP-induced endothelium-dependent relaxation. Consistently, both iPLA2 metabolites arachidonic acid and lysophosphatidylcholine were found to stimulate Ca2+ entry in native endothelial cells. However, only the latter triggered endothelium-dependent relaxation through NO release, suggesting that lysophosphatidylcholine produced by iPLA2 upon Ca2+ stores depletion may act as an intracellular messenger that stimulates store-operated Ca2+ entry and subsequent NO production in endothelial cells. Finally, we found that ACh-induced endothelium relaxation also depends on iPLA2 activation, suggesting that the iPLA2-dependent control of endothelial store-operated Ca2+ entry is a key physiological mechanism regulating arterial tone.
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Affiliation(s)
- François-Xavier Boittin
- Department of Zoology and Animal Biology, Laboratory of Vascular Cell Physiology, University of Geneva, 30 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland.
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23
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Xu M, Platoshyn O, Makino A, Dillmann WH, Akassoglou K, Remillard CV, Yuan JXJ. Characterization of agonist-induced vasoconstriction in mouse pulmonary artery. Am J Physiol Heart Circ Physiol 2007; 294:H220-8. [PMID: 17982012 DOI: 10.1152/ajpheart.00968.2007] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In recent years, transgenic mouse models have been developed to examine the underlying cellular and molecular mechanisms of lung disease and pulmonary vascular disease, such as asthma, pulmonary thromboembolic disease, and pulmonary hypertension. However, there has not been systematic characterization of the basic physiological pulmonary vascular reactivity in normal and transgenic mice. This represents an intellectual "gap", since it is important to characterize basic murine pulmonary vascular reactivity in response to various contractile and relaxant factors to which the pulmonary vasculature is exposed under physiological conditions. The present study evaluates excitation- and pharmacomechanical-contraction coupling in pulmonary arteries (PA) isolated from wild-type BALB/c mice. We demonstrate that both pharmaco- and electromechanical coupling mechanisms exist in mice PA. These arteries are also reactive to stimulation by alpha(1)-adrenergic agonists, serotonin, endothelin-1, vasopressin, and U-46619 (a thromboxane A(2) analog). We conclude that the basic vascular responsiveness of mouse PA is similar to those observed in PA of other species, including rat, pig, and human, albeit on a different scale and to varying amplitudes.
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Affiliation(s)
- Minlin Xu
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0725, USA
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