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2017 ; 18
(5
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Subcutaneous and Visceral Adipose Tissue Secretions from Extremely Obese Men and
Women both Acutely Suppress Muscle Insulin Signaling
#MMPMID28468326
Sarr O
; Strohm RJ
; MacDonald TL
; Gaudio N
; Reed JK
; Foute-Nelong J
; Dyck DJ
; Mutch DM
Int J Mol Sci
2017[May]; 18
(5
): ä PMID28468326
show ga
Adipose tissue plays a key role in the development of type-2 diabetes via the
secretion of adipokines. The current study investigated if secretion media
derived from intact visceral (VAT) and subcutaneous (SAT) adipose tissues from
extremely obese men and women differently suppressed insulin signaling in human
skeletal myotubes derived from a healthy, non-diabetic male and female donor,
respectively. Adipose tissue samples were collected from men and women during
laparoscopic bariatric surgery. In general, secretion media collected from both
SAT and VAT depots caused impaired insulin signaling in myotubes, independent of
sex. In females, this was true regardless of the protein kinase B (Akt)
phosphorylation site (Akt (Thr308) and Akt (Ser473)) assessed (p < 0.01). In
males, both SAT and VAT secretion media reduced Akt (Thr308) activation in
insulin-stimulated myotubes compared to controls (p < 0.001); however, only the
VAT secretion media impaired Akt (Ser473) phosphorylation. Independent of sex, 13
out of 18 detected cytokines, chemokines, and growth factors were more abundant
in VAT versus SAT secretion media (p < 0.01). Both SAT and VAT secretion media
from obese men and women acutely suppress insulin signaling in myotubes, despite
different secretion profiles. We propose that this crosstalk model will help to
extend our understanding of the interplay between adipose and muscle, as well as
the pathogenesis of type-2 diabetes.