8 NEW POLYMORPHIC MICROSATELLITES IN MOUSE GENE LOCI
CYTOGENETICS AND CELL GENETICS
Authors: SANTOS, J; PEREZ DE CASTRO, I; HERRANZ, M; FERNANDEZPIQUERAS, J
Abstract
Eight mouse gene loci (Atp1b2, Epo, Kit, Krt2, Mor1, Ren1, Pdgfb, and Wnt1) that contain unidentified microsatellites were selected to detect simple sequence-length polymorphisms on genomic DNAs from two laboratory strains (C57BL/6J and RF/J) and strains recently derived from the Mus musculus species complex (CAST/Ei, MOLF/Ei, CZECH II, and M. m. domesticus) and from M. spretus (SPRET/Ei). All microsatellite DNA sequences varied in size among some of the seven mouse strains tested. These new polymorphisms might be useful in the search for tumor suppressor genes involved in specific cancers.
Intrafamilial phenotypic heterogeneity of epidermolytic ichthyosis associated with a new missense mutation in keratin 10
CLINICAL AND EXPERIMENTAL DERMATOLOGY
Authors: Abdul-Wahab, A.; Takeichi, T.; Liu, L.; Stephens, C.; Akiyama, M.; McGrath, J. A.
Abstract
Mutations in the keratin 10 gene (KRT10) have been shown to underlie several forms of epidermolytic ichthyosis (EI), including generalized, annular and naevoid variants. We investigated an autosomal dominant pedigree with ichthyosis in which there was intrafamilial clinical heterogeneity, with the affected individual family members presenting with features of either erythrokeratoderma progressiva, annular EI, localized or superficial EI, or more generalized EI. Sanger sequencing identified a new heterozygous missense mutation (c.457C>A; p.Leu153Met) in KRT10 in all affected individuals. No additional mutations were identified in the genes for keratin 1 (KRT1) keratin 2 (KRT2), connexin 31 (GJB3) or connexin 30.3 (GJB4) that might account for the clinical heterogeneity seen in this family. Our findings illustrate the intrafamilial variability in phenotype and diverse clinical presentations that can occur in EI resulting from a single mutation in KRT10.