title: A new Gsdma3 mutation affecting anagen phase of first hair cycle.
abstract: Recombination-induced mutation 3 (Rim3) is a spontaneous mouse mutation that exhibits dominant phenotype of hyperkeratosis and hair loss. Fine linkage analysis of Rim3 and sequencing revealed a novel single point mutation, G1124A leading to Ala348Thr, in Gsdma3 in chromosome 11. Transgenesis with BAC DNA harboring the Rim3-type Gsdma3 recaptured the Rim3 phenotype, providing direct evidence that Gsdma3 is the causative gene of Rim3. We examined the spatial expression of Gsdma3 and characterized the Rim3 phenotype in detail. Gsdma3 is expressed in differentiated epidermal cells in the skin, but not in the proliferating epidermal cells. Histological analysis of Rim3 mutant showed hyperplasia of the epidermal cells in the upper hair follicles and abnormal anagen phase at the first hair cycle. Furthermore, immunohistochemical analysis revealed hyperproliferation and misdifferentiation of the upper follicular epidermis in Rim3 mutant. These results suggest that Gsdma3 is involved in the proliferation and differentiation of epidermal stem cells.
authors.affiliation: Mammalian Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan.
authors.forename: Shigekazu
authors.initials: S
authors.lastname: Tanaka
authors.forename: Masaru
authors.initials: M
authors.lastname: Tamura
authors.forename: Aya
authors.initials: A
authors.lastname: Aoki
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Fujii
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Komiyama
authors.forename: Tomoko
authors.initials: T
authors.lastname: Sagai
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Shiroishi
mesh_terms: D000818:Animals; D018859:Hair Follicle / Q000166:cytology* / Q000502:physiology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D008822:Mice, Transgenic; D008938:Mitosis / Q000235:genetics; D009154:Mutation; D009363:Neoplasm Proteins / Q000235:genetics* / Q000378:metabolism*; D000094524:Gasdermins
chemical_list: D009363:Neoplasm Proteins; C413482:Gsdma protein, mouse; D000094524:Gasdermins