Journal
ANTI-CANCER DRUGS
Volume 25, Issue 7, Pages 819-825Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/CAD.0000000000000110
Keywords
anagen; bone mineral density; chemotherapy; induced alopecia; cyclophosphamide; parathyroid hormone-collagen binding domain
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Funding
- Ochsner Clinic Foundation
- National Institutes of Health Center for Protein Structure and Function [NCRR COBRE 1 P20RR015569, INBRE P20RR016460]
- AR Biosciences Institute (ABI)
- Japan Society for the Promotion of Science
- Kagawa University
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Chemotherapy-induced alopecia is a major source of psychological stress in patients undergoing cancer chemotherapy, and it can influence treatment decisions. Although there is currently no therapy for alopecia, a fusion protein of parathyroid hormone and collagen binding domain (PTH-CBD) has shown promise in animal models. The aim of this study was to determine whether there are dose-dependent effects of PTH-CBD on chemotherapy-induced alopecia in a mouse model. C57BL/6J mice were waxed to synchronize hair follicles; treated on day 7 with vehicle or PTH-CBD (100, 320, and 1000 mcg/kg subcutaneous injection); and treated on day 9 with vehicle or cyclophosphamide (150 mg/kg intraperitoneally). Mice were photographed every 3-4 days and killed on day 63 for histological analysis. Photographs were quantified by gray scale analysis to assess hair content. Mice not receiving chemotherapy showed regrowth of hair 2 weeks after waxing and normal histology after 2 months. Mice receiving chemotherapy alone showed marked hair loss after chemotherapy, which was sustained for 10 days and was followed by rapid regrowth of a normal coat. Histological analysis revealed rapid cycling dystrophic anagen/catagen follicles. Animals receiving chemotherapy and PTH-CBD showed decreased hair loss and more rapid regrowth of hair than that seen with chemotherapy alone (increased hair growth by gray scale analysis, P < 0.05), and the effects were dose dependent. Histologically, hair follicles in animals receiving the highest dose of PTH-CBD were in a quiescent phase, similar to that in mice that did not receive chemotherapy. Single-dose subcutaneous administration of PTH-CBD showed dose-dependent effects in minimizing hair loss and speeding up recovery from chemotherapy-induced alopecia. Anti-Cancer Drugs 25:819-825 (C) 2014 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.
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