title: Mechanism of the protective effect of intraperitoneally administered agonists for formyl peptide receptors against chemotherapy-induced alopecia.
abstract: Previously, we found that an intraperitoneally administered chemotactic peptide, N-formyl-Met-Leu-Phe (fMLP), and MMK-1, a selective agonist of formyl peptide receptor-like 1 (FPRL1) receptor, the low affinity subtype of the fMLP receptor, prevented the alopecia in neonatal rats induced by the anticancer agent etoposide. The anti-alopecia effect of fMLP was not inhibited at all by Boc-FLFLF, a selective antagonist of formylpeptide receptor (FPR), which is the high affinity subtype of the fMLP receptor, but it was partly inhibited by Trp-Arg-Trp-Trp-Trp-Trp-NH(2) (WRW(4)), an antagonist of FPRL1 receptor. On the other hand, the anti-alopecia effect of MMK-1 was completely abolished by WRW(4). The anti-alopecia effects of fMLP and MMK-1 were also inhibited by Lys-D-Pro-Thr (K(D)PT) and pyrrolidine dithiocarbamate, which are inhibitors of interleukin-1 (IL-1) and nuclear factor-kappaB (NF-kappaB) respectively. Hence, we suggest that the anti-alopecia mechanisms of intraperitoneally administered fMLP and MMK-1 include activation of NF-kappaB via IL-1 release downstream of the FPRL1 receptor homolog in rats.
authors.affiliation: Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Tsuruki
authors.forename: Kyoya
authors.initials: K
authors.lastname: Takahata
authors.forename: Masaaki
authors.initials: M
authors.lastname: Yoshikawa
mesh_terms: D000505:Alopecia / Q000139:chemically induced / Q000188:drug therapy*; D000818:Animals; D005047:Etoposide / Q000633:toxicity; D005260:Female; D007274:Injections, Intraperitoneal; D008297:Male; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000008:administration & dosage* / Q000494:pharmacology*; D010455:Peptides / Q000008:administration & dosage* / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D044042:Receptors, Formyl Peptide / Q000819:agonists*
chemical_list: C408903:MMK-1 peptide; D010455:Peptides; D044042:Receptors, Formyl Peptide; D009240:N-Formylmethionine Leucyl-Phenylalanine; D005047:Etoposide