title: [Impact and related mechanism of exogenous receptor activity modifying protein 1 on calcitonin gene-related peptide modified bone marrow mesenchymal stem cells on the migration of vascular smooth muscle cells in vitro].
abstract: OBJECTIVE
  To investigate the impact of calcitonin gene-related peptide (CGRP) modified bone marrow mesenchymal stem cell (MSC) on the migration of vascular smooth muscle cell (VSMC) and related mechanisms.
  
  
  METHODS
  The MSC and VSMC were isolated from rats and cultured, CGRP was transfected to MSC with the high expression lentivirus vector, VSMC was transfected with high expression lentivirus vector of receptor activity modifying protein 1 (RAMP1) and the silence expression lentivirus vector of RAMP1. Then MSC was co-cultured with VSMC. Experimental groups were as follows: (1) Ang II group (MSC + VSMC + Ang II); (2) MSC(CGRP+) group (MSC(CGRP+) + VSMC + Ang II); (3) MSC(CGRP+) RAMP1(-) group (MSC(CGRP+) + VSMC(RAMP1-) + Ang II); (4) MSC(CGRP+) RAMP1(+) group (MSC(CGRP+) + VSMC(RAMP1+) + Ang II); (5) RAMP1(+) group (MSC + VSMC(RAMP1+) + Ang II). Transwell assay was applied to detect the migration of smooth muscle cells, Western blot was applied to detect the protein expression of cells in various groups.
  
  
  RESULTS
  VSMC migration number was significantly lower in MSC(CGRP+) group compared with Ang II group (50.8 ± 2.6 vs. 71.4 ± 2.3, P < 0.05), but higher than in MSC(CGRP+) RAMP1(+) group (50.8 ± 2.6 vs. 30.4 ± 3.0, P < 0.05). When RAMP1 expression reduced in VSMC, compared with MSC(CGRP+) RAMP1(+) group, VSMC migration increased in the MSC(CGRP+) RAMP1(-) group compared to MSC(CGRP+)RAMP1(+) (69.0 ± 5.6 vs. 30.4 ± 3.0, P < 0.05) and was similar to Ang II group (69.0 ± 5.6 vs. 71.4 ± 2.3, P > 0.05) and RAMP1(+) group (71.6 ± 3.4). According to the result of Western blot, P-P65 protein expression in MSC(CGRP+) group was lower than that in Ang II group (0.475 ± 0.022 vs.0.642 ± 0.035, P < 0.05). P-P65 protein expression in MSC(CGRP+)RAMP1(-) group was higher than that in MSC(CGRP+) RAMP1(+) group (0.670 ± 0.030 vs. 0.373 ± 0.041, P < 0.05), and there was no difference between MSC(CGRP+)RAMP1(-) group and Ang II group (P > 0.05). P-P65 protein expression was similar between RAMP1(+) group (0.643 ± 0.039) and Ang II group (P > 0.05).
  
  
  CONCLUSIONS
  CGRP inhibits VSMC migration through RAMP1. NF-κB and RAMP1 play crucial role in the inhibiting effects of CGRP on VSMC migration. Thus, RAMP1-CGRP signaling inhibits VSMC migration through NF-κB signal pathways.
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China.
authors.forename: Xianping
authors.initials: X
authors.lastname: Long
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China.
authors.forename: Can
authors.initials: C
authors.lastname: Cui
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China.
authors.forename: Panke
authors.initials: P
authors.lastname: Chen
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China.
authors.forename: Song
authors.initials: S
authors.lastname: Wang
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Wang
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China.
authors.forename: Guanxue
authors.initials: G
authors.lastname: Xu
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China.
authors.forename: Xiaojian
authors.initials: X
authors.lastname: Yao
authors.affiliation: Deparment of Cardiology, First Affiliated Hospital, Zunyi Medical College, Zunyi 563003, China; Email: shibei2147@163.com.
authors.forename: Bei
authors.initials: B
authors.lastname: Shi
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D015740:Calcitonin Gene-Related Peptide; D002465:Cell Movement; D018920:Coculture Techniques; D006412:Hematopoietic Stem Cells; D066298:In Vitro Techniques; D009131:Muscle, Smooth, Vascular; D032389:Myocytes, Smooth Muscle; D016328:NF-kappa B; D051381:Rats; D058262:Receptor Activity-Modifying Protein 1; D015398:Signal Transduction; D014162:Transfection
chemical_list: D016328:NF-kappa B; C545508:Ramp1 protein, rat; D058262:Receptor Activity-Modifying Protein 1; D015740:Calcitonin Gene-Related Peptide