Abstract:
:Expression of insulin-like growth factor 1 (IGF-1) mRNAs splice forms was recently shown to be stimulated by myofibrillar proteins released from the damaged muscle. In this study, we report that individual subfragments of titin and myomesin composed of Fn type III and Ig-like domains can activate expression of two IGF-1 splice forms in cultured myoblasts, both at protein and mRNA levels. Competition studies showed that each of the domain-types interacts with its own receptor. Induction of IGF-1 expression caused by domains of different types showed dissimilar sensitivity to inhibitors of regulatory cascades. The effect of Fn type III domains was more sensitive to inhibition of Ca(2+)/calmodulin dependent protein kinase, whereas the effect of Ig-like domains showed greater sensitivity to the inhibition of the adenylyl cyclase-cAMP-PKA pathway.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Kravchenko IV,Furalyov VA,Chatziefthimiou S,Wilmanns M,Popov VOdoi
10.1016/j.mce.2014.08.010subject
Has Abstractpub_date
2015-01-05 00:00:00pages
69-77eissn
0303-7207issn
1872-8057pii
S0303-7207(14)00247-0journal_volume
399pub_type
杂志文章abstract::It has been well established for decades that androgens, namely testosterone (T) plays an important role in female reproductive physiology as the precursor for oestradiol (E2). However, in the last decade a direct role for androgens, acting via the androgen receptor (AR), in female reproductive function has been confi...
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