Soluble fms-like tyrosine kinase-1 and angiotensin2 target calcitonin gene-related peptide family peptides in maternal vascular smooth muscle cells in pregnancy

• Published in: Biology of reproduction 2021-05, Vol.104 (5), p.1071-1083
• Main Authors: Chauhan, Madhu, Betancourt, Ancizar, Balakrishnan, Meena, Mishra, Akansha, Fox, Karin, Belfort, Michael, Yallampalli, Chandra
• Format: Article
• Language: English
• Subjects: Adenylic acid; angiotensin 2; Blood pressure; Calcitonin Gene-Related Peptide - metabolism; calcitonin gene-related peptides; cAMP; Cyclic adenylic acid; Female; Genes; Genetic research; Gynecology; Humans; Multigene Family; Muscle, Smooth, Vascular - metabolism; Myocytes, Smooth Muscle - metabolism; Obstetrics; Peptides; Phenols; Preeclampsia; Pregnancy; Pregnant women; Protein-protein interactions; Proteins; RESEARCH ARTICLE; RNA; sFLT-1; Smooth muscle; Tyrosine; Vascular endothelial growth factor; Vascular Endothelial Growth Factor Receptor-1 - genetics; Vascular Endothelial Growth Factor Receptor-1 - metabolism; vascular smooth muscle cells; Vesicular Transport Proteins - genetics; Vesicular Transport Proteins - metabolism
• ISSN: 0006-3363; 1529-7268
• DOI: 10.1093/biolre/ioab026

Calcitonin gene-related peptide (CALCB), adrenomedullin (ADM), and adrenomedullin2 (ADM2) are hypotensive peptides that belong to CALCB family of peptides. Goal of this study was to identify the effect of fms-like tyrosine kinase (sFLT-1) and angiotensin2 (Ang2) on the function of these peptides in OA smooth muscle cells (OASMC) and assess the sensitivity of OA for these peptides in preeclampsia (PE) and normotensive pregnancy. Methods: Peptide function was assessed by Cyclic adenosine monophosphate (cAMP) assays and wire myograph; mRNA expression by Polymerase chain reaction (PCR) and protein-protein interaction by proximity ligation assay and co-immunoprecipitation. Findings: All three peptides increased cAMP synthesis in the order of efficacy CALCB > ADM = ADM2 and vascular endothelial growth factor (VEGF) mRNA in OASMC (P < 0.05); sFLT-1 mediated decrease in cAMP synthesis (P < 0.05) is differentially rescued by all three CALCB family peptides in OASMC (P < 0.005); sFLT-1 decreased receptor activity-modifying protein (RAMP)1 and RAMP2 mRNA expression (P < 0.05); Ang2 decreased the expression of calcitonin-receptor-like receptor and RAMP1 mRNA and desensitized CALCB and ADM2 receptors in OASMC (P < 0.05); sFLT-1 increased RAMP1and Ang2 type 1 receptor (AT1R) interaction in OASMC which is inhibited in presence of all three peptides; and all three peptides relax OA in PE with enhanced ADM2 response (P < 0.05). Conclusion: sFLT-1 and Ang2 impair OASMC mediated functional responses of CALCB family peptides which can be inhibited by respective peptide treatment. The sensitivity of OA for CALCB, ADM, and ADM2-mediated relaxation is retained in PE. Summary sentence sFLT-1 and Ang2 impair smooth muscle cell mediated functional responses of CALCB family peptides which can be inhibited by respective peptide treatment. Graphical Abstract