Abstract
We evaluated the preventive effect of the antioxidant edaravone (EDR) on chemotherapy-induced alopecia (CIA) to improve quality of life in cancer patients. Hair loss was induced by intraperitoneally administering cyclophosphamide (CPA, 75 mg/kg) to rats, and topically applying EDR ointment (100 mg/day) once daily for 16 days (when hair loss starts) or 21 days (just before hair growth). The rats were divided into four groups: control group (without CPA or EDR), EDR 0% group (CPA + EDR 0%), EDR 3% group (CPA + EDR 3%), and EDR 30% group (CPA + EDR 30%). The prevention of CIA was evaluated by the hair coverage score (five levels from 0 to 4). Furthermore, we measured the size of the hair follicle area and the expression levels of insulin-like growth factor (IGF)-1 mRNA in dermal papilla cells. The EDR 3% and EDR 30% groups exhibited higher hair coverage scores than the EDR 0% group on day 16 and day 21. On day 16, the hair follicle area in the EDR 3% and EDR 30% groups was significantly larger than that in the EDR 0% group. Furthermore, IGF-1 expression levels in the EDR 3% group were significantly higher than those in the EDR 0% group. On day 21, no significant difference was observed in hair follicle area or IGF-1 mRNA levels among the groups. Our results show that EDR administration lessened hair loss due to CPA in a dose-independent manner above doses of 3%, suggesting potential applications beside chemotherapy.
Published Version
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