ArticleCell biochemistry and biophysics2025
Vasoactive Intestinal Peptide (VIP) and its Receptors in Adipose Tissue: Implications for Cold Stress Adaptation.
Article in Cell biochemistry and biophysics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Adipose tissue represents an organ that is highly dynamic and contributes toward vital survival events such as immune responses, lactation, metabolism fuel, and thermogenesis. Data emerging from recent studies support the notion of adipose tissue being organized into a complex system characterized by a discrete anatomy, elevated physiological plasticity, and specific vascular and nerve supplies. Vasoactive intestinal peptide (VIP), along with its receptors, type 1 (VPAC1) and type 2 (VPAC2), has been implicated in various physiological and pathophysiological processes. However, studies on VIP and its receptors in adipose tissue are limited. To explore VIP's presence and activity, as well as its adipose tissue-based receptors, we conducted a study on isolated adipocytes and adipose tissue from inguinal white adipose tissue (WAT) and interscapular brown adipose tissue (BAT) in normal and cold-stressed rats. Our findings indicate the presence of the gene expression VIP and VPAC1 in both WAT and BAT under normal conditions, while VPAC2 was absent. In both WAT and BAT, cold exposure upregulated VIP gene expression. However, the response of VIP receptors to cold exposure is controversial. VPAC2 gene expression was induced in both WAT and BAT, while VPAC1 gene expression presented no change of significance in BAT and a slight reduction in WAT. Additionally, VIP, VPAC1, and VPAC2 proteins were identified from Western blot studies on white and brown adipocytes. After exposure to cold there was an increase of significance in the VIP, VPAC1, and VPAC2 protein levels. This study provides novel insights into how VIP and its receptors alter gene expression and protein levels in adipose tissue and adipocytes during cold stress, indicating their potential involvement in adipose tissue regulation. The findings propose VIP's potentially crucial role in adipose tissue's adaptation to cold stress by affecting the metabolic and biochemical functions of subcutaneous and interscapular adipocytes, with potentially significant implications in the context of developing therapies targeting metabolic disorders.
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