IGF-I promotes Schwann cell motility and survival via activation of Akt
HL Cheng, M Steinway, CL Delaney, TF Franke… - Molecular and cellular …, 2000 - Elsevier
HL Cheng, M Steinway, CL Delaney, TF Franke, EL Feldman
Molecular and cellular endocrinology, 2000•ElsevierWe previously reported insulin-like growth factor-I (IGF-I) promotes Schwann cell (SC)
motility and rescues SC from apoptosis induced by serum deprivation. This effect is
mediated by phosphatidylinositol-3 (PI-3) kinase. In the current study, we examined the role
of Akt, a downstream kinase of PI-3K, in SC motility and IGF-I mediated protection from
apoptosis. IGF-I induces Akt phosphorylation at Ser473, an event which may be blocked by
pretreatment with a PI-3K inhibitor, LY294002. In dominant negative K179M Akt (K179M) …
motility and rescues SC from apoptosis induced by serum deprivation. This effect is
mediated by phosphatidylinositol-3 (PI-3) kinase. In the current study, we examined the role
of Akt, a downstream kinase of PI-3K, in SC motility and IGF-I mediated protection from
apoptosis. IGF-I induces Akt phosphorylation at Ser473, an event which may be blocked by
pretreatment with a PI-3K inhibitor, LY294002. In dominant negative K179M Akt (K179M) …
We previously reported insulin-like growth factor-I (IGF-I) promotes Schwann cell (SC) motility and rescues SC from apoptosis induced by serum deprivation. This effect is mediated by phosphatidylinositol-3 (PI-3) kinase. In the current study, we examined the role of Akt, a downstream kinase of PI-3K, in SC motility and IGF-I mediated protection from apoptosis. IGF-I induces Akt phosphorylation at Ser473, an event which may be blocked by pretreatment with a PI-3K inhibitor, LY294002. In dominant negative K179M Akt (K179M) transfected SC, however, Akt is not activated in response to IGF-I. In addition, IGF-I is unable to promote SC motility and survival in K179M SC. These results suggest a critical role for Akt in IGF-I mediated motility and survival in SC.
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