1alpha,25(OH)2-vitamin D3 and 17beta-estradiol: two steroid partners acting in skeletal muscle?

BUITRAGO C; MILANESI L; RONDA A; VASCONCUELO A; BOLAND R

Current Medicinal Chemistry (Immunology, Endocrine & Metabolic Agents in Medicinal Chemistry -IEMAMC)

Bentham Science Publisher

Año: 2009 p. 159 - 168

1568-0134

1alpha,25(OH)2-vitamin D3 and 17􀀂-estradiol regulate skeletal muscle cell proliferation, differentiation, apoptosis and contractility through receptor-mediated transcriptional and non-genomic mechanisms. This review focuses on recent advances on signal transduction pathways activated by both steroid hormones. Data are given on the participation of the VDR and ERs (alpha and beta) in activation of MAPKs in muscle cells. Likewise, we describe novel evidence supporting non-classical localizations of the VDR in the plasma membrane and ER alpha in mitochondria. 1alpha,25(OH)2D3 promotes DNA synthesis in skeletal muscle cells implicating c-Src/ERK1/2, whereas 17􀀂-estradiol inhibits apoptosis through ERK2 and p38 MAPKs. This study provides basis for the understanding of vitamin D- and estrogen-dependent myopathies.