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| Pàgina inicial > Articles > Articles publicats > Transient cerebral ischaemia alters mesenteric arteries in hypertensive rats : |
(Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) (Universitat Autònoma de Barcelona. Departament de Bioquímica i de Biologia Molecular) (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) (Instituto de Investigación Sanitaria del Hospital Universitario La Paz) (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia) (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia) (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia)
| Data: | 2024 |
| Resum: | Stroke induces brain injury, especially severe in hypertensive patients, and elevates mortality rates through non-neurological complications. However, the potential effects of a transient ischaemic episode on the peripheral vasculature of hypertensive individuals remain unclear. We investigated whether transient cerebral ischaemia (90 min)/reperfusion (1 or 8 days) induces alterations in mesenteric resistance artery (MRA) properties in adult male spontaneously hypertensive rats (SHR). In addition, we assessed whether the reported cerebroprotective effects of suberoylanilide hydroxamic acid (SAHA; 50 mg/kg; administered intraperitoneally at 1, 4, or 6 h after reperfusion onset) extend over several days and include beneficial effects on MRAs. Functional and structural properties of MRAs were examined at 1- and 8-days post-stroke. Nuclei distribution, collagen content, and oxidative stress were assessed. Ischaemic brain damage was evaluated longitudinally using magnetic resonance imaging. Following stroke, MRAs from SHR exhibited non-reversible impaired contractile responses to the thromboxane A receptor agonist U46619. Stroke increased the MRA cross-sectional area, wall thickness, and wall/lm ratio due to augmented collagen deposition. These changes were partially sustained 8 days later. SAHA did not improve U46619-induced contractions but mitigated stroke-induced oxidative stress and collagen deposition, preventing MRA remodelling at 24 h of reperfusion. Furthermore, SAHA induced sustained cerebroprotective effects over 8 days, including reduced brain infarct and oedema, and improved neurological scores. However, SAHA had minimal impact on chronic MRA contractile impairments and remodelling. These findings suggest that stroke causes MRA changes in hypertensive subjects. While SAHA treatment offers sustained protection against brain damage, it cannot fully restore MRA alterations. |
| Ajuts: | Agencia Estatal de Investigación PID2020-113634RB-C22 Agencia Estatal de Investigación PID2019-108496RA-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00969 Ministerio de Sanidad y Consumo CB06/05/1105 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.  |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Stroke ; Vasoconstriction ; Vascular remodelling ; Peripheral vessels ; Vorinostat ; Cerebroprotection |
| Publicat a: | Life sciences, Vol. 359 (15 2024) , p. 123247, ISSN 1879-0631 |
