Hair follicle metabolic suppression

Hair follicle metabolic suppression is a physiological state or therapeutic strategy characterized by the temporary reduction of cellular activity and proliferation within the hair follicle unit, particularly the highly mitotic matrix cells. This approach is primarily investigated as a clinical intervention to prevent chemotherapy-induced alopecia (CIA), as hair follicles are among the most rapidly dividing non-malignant cells in the body and are thus highly sensitive to cytotoxic agents (Purba et al., 2019, EMBO Molecular Medicine). Pharmacological induction of this state typically involves the use of cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors, which arrest hair follicle matrix cells in the G1 phase of the cell cycle, rendering them less vulnerable to DNA-damaging chemotherapy (He et al., 2019, Science Translational Medicine). Physical methods, such as scalp cooling, also achieve metabolic suppression through localized vasoconstriction and reduced biochemical reaction rates (Ruggero et al., 2017, JAMA). The goal of this suppression is to provide a transient and reversible protective shield for the hair organ during the peak systemic concentration of antineoplastic drugs, ensuring that normal hair growth can resume once the cytotoxic threat has diminished.

Other names

Follicular quiescence inductionHair follicle cell cycle suppressionMetabolic shunting of the hair follicleTransient follicular arrest

Induction of transient G1 cell cycle arrest in hair follicle matrix cells to reduce susceptibility to cytotoxic chemotherapy.