Reduced intestinal butyrate availability is associated with the vascular remodeling in resistance arteries of hypertensive rats

Autor(es)

Dardi, Patrizia ; Dos Santos-Eichler, Rosangela Aparecida ; de Oliveira, Sarah ; Ramirez Vinolo, Marco Aurelio ; Saraiva Camara, Niels Olsen ; Rossoni, Luciana Venturini

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN PHYSIOLOGY; v. 13, p. 12-pg., 2022-09-29.

Resumo

During hypertension an unbalance of short-chain fatty acids (SCFAs) production by intestinal bacteria is described. However, no data evaluate the association of SCFAs and vascular remodeling in hypertension, which is an important hallmark of this disease. Thus, the present study aims to evaluate the correlations between SCFAs availability and the resistance arteries remodeling in hypertension, as well as to identify the possible pathway by which the SCFAs could exert a structural and mechanical influence. Hence, male spontaneously hypertensive rats (SHR) and normotensive Wistar rats had blood pressure measured by tail-cuff plethysmography; fecal SCFAs content assessed by gas chromatography; gene expression of SCFAs-transporters in gut epithelium and SCFAs-sensing receptors on mesenteric resistance arteries (MRA) quantified by PCR; and MRA structural and mechanical parameters analyzed by pressure myograph. Reduced butyrate fecal content was found in SHR, with no changes in propionate and acetate, as well as decreased mRNA levels of SCFAs-transporters (MCT1, MCT4, and SMCT1) in the intestinal epithelium. In addition, lower gene expression of SCFAs-sensing receptors (GPR41, GPR43, and GPR109a, but not Olfr78) was identified in MRAs of SHR, which also shows inward eutrophic remodeling with stiffness. Butyrate content presented a negative correlation with systolic blood pressure and with the structural alterations found on MRAs, while a positive correlation between butyrate content and mechanical parameters was detected. Altogether the present study suggests that lower butyrate content due to ineffective SCFA bioavailability, associated with lower SCFAs-sensing receptors expression, could favor MRA remodeling, increasing peripheral vascular resistance and worsening hypertension prognosis. (AU)

• Processo FAPESP: 19/08026-5 - Ajustes da inervação perivascular e do remodelamento em artéria de resistência do modelo de hipertensão arterial DOCA-sal: participação da ouabaína endógena
• Beneficiário: Luciana Venturini Rossoni
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/10381-5 - Estudo do efeito da amamentação cruzada sobre as modificações intestinais que influenciam o remodelamento vascular e o desenvolvimento da Hipertensão Arterial
• Beneficiário: Patrizia Dardi
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/15313-8 - Análise dos mecanismos moleculares envolvidos na interação de metabólitos da microbiota e células do hospedeiro durante a inflamação
• Beneficiário: Marco Aurélio Ramirez Vinolo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2