The Ca2+/CaM, Src kinase and/or PI3K-dependent EGFR transactivation via 5-HT2A and 5-HT1B receptor subtypes mediates 5-HT-induced vasoconstriction

Guner S., Akhayeva T., Nichols C. D., GÜRDAL H.

Biochemical Pharmacology, cilt.206, 2022 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 206
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.bcp.2022.115317
  • Dergi Adı: Biochemical Pharmacology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, EMBASE, MEDLINE, Veterinary Science Database
  • Anahtar Kelimeler: 5-HT receptor subtypes, EGFR, Transactivation, Vascular smooth muscle, EPIDERMAL-GROWTH-FACTOR, SMOOTH-MUSCLE-CELLS, TYROSINE KINASE, ANGIOTENSIN-II, C-SRC, PHOSPHATIDYLINOSITOL 3-KINASE, REGULATED KINASE, RAT AORTA, ACTIVATION, CONTRACTION
  • Ankara Üniversitesi Adresli: Evet

Özet

© 2022 Elsevier Inc.G protein-coupled receptors (GPCR) and receptor tyrosine kinases (RTK) modulate vascular tone and contraction via rapid and long-term processes. Sustained activation of these receptor types can change vascular structure, and the ability of vasculature to adapt to high pressure. In this study, the interaction between serotonin (5-HT) receptors and epidermal growth factor receptors (EGFR) on vasoconstriction and the mechanisms of EGFR transactivation and its downstream mediators were investigated. We measured 5-HT-induced vasoconstriction in the aorta and the mesenteric artery; and the effects of EGFR, Src and PI3K, and their downstream mediators Erk1/2 and Akt phosphorylation on 5-HT-mediated vasoconstriction in the presence or absence of pharmacological inhibitors of Ca2+/CaM, EGFR, Src, and PI3K. Furthermore, we determined the contribution of 5-HT receptor subtypes to 5-HT-induced vasoconstriction and EGFR transactivation using selective 5-HT2A and 5-HT1B receptors ligands. Our results show that EGFR, Src, and PI3K are involved in 5-HT-induced vasoconstriction both in the aorta and the mesenteric artery, and that these kinases have a more prominent role in the mesenteric artery than the aorta. With regard to EGFR transactivation by 5-HT, Ca2+/CaM, Src and PI3K are upstream mediators, and transactivation is partly mediated by Erk1/2 and Akt activation. Furthermore, Ca2+/CaM, Src, and PI3K are the main regulators for Akt activation, however Src only has a prominent role for Erk1/2 activation. 5-HT2A and 5-HT1B receptors have different EGFR transactivation profiles through Src and/or PI3K, with 5-HT2A having a greater role than 5-HT1B receptors.