The adipokine chemerin augments vascular reactivity to contractile stimuli via activation of the MEK-ERK1/2 pathway

N. S. Lobato, K. B. Neves, F. P. Filgueira, Z. B. Fortes, M. H.C. Carvalho, R Clinton Webb, A. M. Oliveira, R. C. Tostes

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Aims: Cytokines interfere with signaling pathways and mediators of vascular contraction. Endothelin-1 (ET-1) plays a major role on vascular dysfunction in conditions characterized by increased circulating levels of adipokines. In the present study we tested the hypothesis that the adipokine chemerin increases vascular contractile responses via activation of ET-1/ET-1 receptors-mediated pathways. Main methods: Male, 10-12 week-old Wistar rats were used. Endothelium-intact and endothelium-denuded aortic rings were incubated with chemerin (0.5 ng/mL or 5 ng/mL, for 1 or 24 h), and isometric contraction was recorded. Protein expression was determined by Western blotting. Key findings: Constrictor responses to phenylephrine (PE) and ET-1 were increased in vessels treated for 1 h with chemerin. Chemerin incubation for 24 h decreased PE contractile response whereas it increased the sensitivity to ET-1. Endothelium removal significantly potentiated chemerin effects on vascular contractile responses to PE and ET-1. Incubation with either an ERK1/2 inhibitor (PD98059) or ETA antagonist (BQ123) abolished chemerin effects on PE- and ET-1-induced vasoconstriction. Phosphorylation of MEK1/2 and ERK1/2 was significantly increased in vessels treated with chemerin for 1 and 24 h. Phosphorylation of these proteins was further increased in vessels incubated with ET-1 plus chemerin. ET-1 increased MEK1/2, ERK1/2 and MKP1 protein expression to values observed in vessels treated with chemerin. Significance: Chemerin increases contractile responses to PE and ET-1 via ERK1/2 activation. Our study contributes to a better understanding of the mechanisms by which the adipose tissue affects vascular function and, consequently, the vascular alterations present in obesity and related diseases.

Original languageEnglish (US)
Pages (from-to)600-606
Number of pages7
JournalLife sciences
Volume91
Issue number13-14
DOIs
StatePublished - Oct 15 2012

Fingerprint

Adipokines
MAP Kinase Signaling System
Mitogen-Activated Protein Kinase Kinases
Endothelin-1
Blood Vessels
Chemical activation
Phenylephrine
Endothelium
Phosphorylation
Endothelin A Receptors
Proteins
Isometric Contraction
Vasoconstriction
Adipose Tissue
Wistar Rats
Rats
Obesity
Western Blotting
Tissue
Cytokines

Keywords

  • Chemerin
  • Contractile response
  • ERK1/2
  • Thoracic aorta

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

Cite this

Lobato, N. S., Neves, K. B., Filgueira, F. P., Fortes, Z. B., Carvalho, M. H. C., Webb, R. C., ... Tostes, R. C. (2012). The adipokine chemerin augments vascular reactivity to contractile stimuli via activation of the MEK-ERK1/2 pathway. Life sciences, 91(13-14), 600-606. https://doi.org/10.1016/j.lfs.2012.04.013

The adipokine chemerin augments vascular reactivity to contractile stimuli via activation of the MEK-ERK1/2 pathway. / Lobato, N. S.; Neves, K. B.; Filgueira, F. P.; Fortes, Z. B.; Carvalho, M. H.C.; Webb, R Clinton; Oliveira, A. M.; Tostes, R. C.

In: Life sciences, Vol. 91, No. 13-14, 15.10.2012, p. 600-606.

Research output: Contribution to journalArticle

Lobato, NS, Neves, KB, Filgueira, FP, Fortes, ZB, Carvalho, MHC, Webb, RC, Oliveira, AM & Tostes, RC 2012, 'The adipokine chemerin augments vascular reactivity to contractile stimuli via activation of the MEK-ERK1/2 pathway', Life sciences, vol. 91, no. 13-14, pp. 600-606. https://doi.org/10.1016/j.lfs.2012.04.013
Lobato, N. S. ; Neves, K. B. ; Filgueira, F. P. ; Fortes, Z. B. ; Carvalho, M. H.C. ; Webb, R Clinton ; Oliveira, A. M. ; Tostes, R. C. / The adipokine chemerin augments vascular reactivity to contractile stimuli via activation of the MEK-ERK1/2 pathway. In: Life sciences. 2012 ; Vol. 91, No. 13-14. pp. 600-606.
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AU - Fortes, Z. B.

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AU - Webb, R Clinton

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