Details

Autor(en) / Beteiligte

• Korshunov, Vyacheslav A.
• Quinn, Breandan
• Faiyaz, Abrar
• Ahmed, Rifat
• Sowden, Mark P.
• Doyley, Marvin M.
• Berk, Bradford C.

Titel

Strain‐selective efficacy of sacubitril/valsartan on carotid fibrosis in response to injury in two inbred mouse strains

Ist Teil von

• British journal of pharmacology, 2019-08, Vol.176 (15), p.2795-2807

Ort / Verlag

England: Blackwell Publishing Ltd

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• Background and Purpose Sacubitril/valsartan (Sac/val) is more effective than valsartan in lowering BP and mortality in patients with heart failure. Here, we proposed that Sac/val treatment would be more effective in preventing pathological vascular remodelling in 129X1/SvJ (129X1), than in C57BL/6J (B6) inbred mice. Experimental Approach Sac/val (60 mg·kg−1·day−1) and valsartan (27 mg·kg−1·day−1) were given as prophylactic or therapeutic treatments, to 129X1 or B6 mice with carotid artery ligation for 14 days. Blood flow was measured by ultrasound. Ex vivo, carotid tissue was analysed with histological and morphometric techniques, together with RNA sequencing and gene ontology. Key Results Sac/val was more effective than valsartan in lowering BP in 129X1 compared with B6 mice. Liver expression of CYP2C9 and plasma cGMP levels were similar across treatments. A reduction in carotid thickening after prophylactic treatment with valsartan or Sac/val also resulted in significant arterial shrinkage in B6 mice. In 129X1 mice, Sac/val and prophylactic treatment with valsartan had no effect on carotid thickening but preserved carotid size. BP lowering significantly correlated with a decline in carotid stiffness (R2 = .37, P = .0096) in 129X1 but not in B6 mice. The gene expression signature associated with hyalurononglucosaminidase activity was down‐regulated in injured arteries after both regimens of Sac/val only in 129X1 mice. Administration of Sac/val but not valsartan significantly reduced deposition of hyaluronic acid and carotid fibrosis in 129X1 mice. Conclusion and Implications These results underscore the importance of the genetic background in the efficacy of the Sac/val on vascular fibrosis.