Oxytocin is a naturally occurring nonapeptide hormone and neuropeptide synthesized in the hypothalamus and released by the posterior pituitary gland. In research settings, it is investigated for its role in activating oxytocin receptors (OXTR) coupled to Gq/11 proteins, influencing phospholipase C signaling cascades, calcium mobilization, and downstream effects on smooth muscle contraction, social behavior circuits, and neuroendocrine regulation.
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