TY - JOUR
T1 - Anabolic androgenic steroids and intracellular calcium signaling
T2 - A mini review on mechanisms and physiological implications
AU - Vicencio, J. M.
AU - Estrada, M.
AU - Galvis, D.
AU - Bravo, R.
AU - Contreras, A. E.
AU - Rotter, D.
AU - Szabadkai, G.
AU - Hill, Joseph A
AU - Rothermel, Beverly A
AU - Jaimovich, E.
AU - Lavandero, S.
PY - 2011/6
Y1 - 2011/6
N2 - Increasing evidence suggests that nongenomic effects of testosterone and anabolic androgenic steroids (AAS) operate concertedly with genomic effects. Classically, these responses have been viewed as separate and independent processes, primarily because nongenomic responses are faster and appear to be mediated by membrane androgen receptors, whereas long-term genomic effects are mediated through cytosolic androgen receptors regulating transcriptional activity. Numerous studies have demonstrated increases in intracellular Ca2+ in response to AAS. These Ca2+ mediated responses have been seen in a diversity of cell types, including osteoblasts, platelets, skeletal muscle cells, cardiac myocytes and neurons. The versatility of Ca2+ as a second messenger provides these responses with a vast number of pathophysiological implications. In cardiac cells, testosterone elicits voltage-dependent Ca2+ oscillations and IP3Rmediated Ca2+ release from internal stores, leading to activation of MAPK and mTOR signaling that promotes cardiac hypertrophy. In neurons, depending upon concentration, testosterone can provoke either physiological Ca2+ oscillations, essential for synaptic plasticity, or sustained, pathological Ca2+ transients that lead to neuronal apoptosis. We propose therefore, that Ca2+ acts as an important point of crosstalk between nongenomic and genomic AAS signaling, representing a central regulator that bridges these previously thought to be divergent responses.
AB - Increasing evidence suggests that nongenomic effects of testosterone and anabolic androgenic steroids (AAS) operate concertedly with genomic effects. Classically, these responses have been viewed as separate and independent processes, primarily because nongenomic responses are faster and appear to be mediated by membrane androgen receptors, whereas long-term genomic effects are mediated through cytosolic androgen receptors regulating transcriptional activity. Numerous studies have demonstrated increases in intracellular Ca2+ in response to AAS. These Ca2+ mediated responses have been seen in a diversity of cell types, including osteoblasts, platelets, skeletal muscle cells, cardiac myocytes and neurons. The versatility of Ca2+ as a second messenger provides these responses with a vast number of pathophysiological implications. In cardiac cells, testosterone elicits voltage-dependent Ca2+ oscillations and IP3Rmediated Ca2+ release from internal stores, leading to activation of MAPK and mTOR signaling that promotes cardiac hypertrophy. In neurons, depending upon concentration, testosterone can provoke either physiological Ca2+ oscillations, essential for synaptic plasticity, or sustained, pathological Ca2+ transients that lead to neuronal apoptosis. We propose therefore, that Ca2+ acts as an important point of crosstalk between nongenomic and genomic AAS signaling, representing a central regulator that bridges these previously thought to be divergent responses.
KW - Androgens
KW - Ca
KW - Cardiac myocytes
KW - Genomic
KW - Heart
KW - Neurons
KW - Nongenomic
KW - Skeletal muscle cells
KW - Testosterone
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U2 - 10.2174/138955711795445880
DO - 10.2174/138955711795445880
M3 - Review article
C2 - 21443511
AN - SCOPUS:79955647285
SN - 1389-5575
VL - 11
SP - 390
EP - 398
JO - Mini-Reviews in Medicinal Chemistry
JF - Mini-Reviews in Medicinal Chemistry
IS - 5
ER -