Stem cells with neurogenic potential and steroid hormones

Area of Science:

• Neuroscience
• Endocrinology
• Stem Cell Biology

Background:

• Pluripotent and multipotent stem cells can differentiate into neural phenotypes.
• Sex steroid hormones, traditionally linked to reproductive functions, also modulate nerve cell development and survival.
• Neurosteroids are synthesized within the nervous system.

Purpose of the Study:

• To review the molecular actions of sex steroid hormones on the Central Nervous System.
• To summarize the effects of steroid hormones on stem cell parameters in vitro and in vivo.
• To highlight the role of steroid hormones in neurogenesis.

Main Methods:

• Literature review of studies on steroid hormone effects on neural stem cells.
• Analysis of in vitro and in vivo experimental data.
• Focus on progesterone, allopregnanolone, dehydroepiandrosterone, estradiol, and androgens.

Main Results:

• Steroid hormones influence stem cell behavior through multiple mechanisms.
• These mechanisms include regulation of gene expression via cognate receptors.
• Hormones activate intracellular pathways (kinases, calcium signaling) and modulate neurotransmitter receptors.

Conclusions:

• Steroid hormones significantly impact neurogenic stem cell self-renewal, proliferation, differentiation, and cell death.
• These hormones can substitute for or modulate growth factor actions.
• Steroid hormones are key regulators of neural stem cell fate and function.