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Glucocorticoids regulate a variety of physiological processes, and are commonly used to treat disorders of inflammation, autoimmune diseases, and cancer. Glucocorticoid action is predominantly mediated through the classic glucocorticoid receptor (GR), but sensitivity to glucocorticoids varies among individuals, and even within different tissues from the same individual. The molecular basis of this phenomenon can be partially explained through understanding the process of generating bioavailable ligand and the molecular heterogeneity of the GR. The molecular mechanisms that regulate glucocorticoid action highlight the dynamic nature of hormone signaling and provide novel insights into genomic glucocorticoid actions and glucocorticoid sensitivity. Although glucocorticoids are highly effective for therapeutic purposes, long-term and/or high-dose glucocorticoid administration often leads to reduced glucocorticoid sensitivity or resistance. Here, we summarize our current understanding of the mechanisms that modulate glucocorticoid sensitivity and resistance with a focus on GR-mediated signaling.
Ramamoorthy et al. (Tue,) studied this question.