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A gene (Carg1) that regulates tissue resistance to Candida albicans maps to chromosome 14 of the mouse.

Tissue susceptibility and resistance to infection with the yeast Candida albicans is genetically regulated. Analysis of the strain distribution pattern of the C. albicans resistance gene (Carg1) and additional gene and DNA segment markers in the AKXL recombinant inbred (RI) set showed that 13/15 RI strains were concordant for Carg1, Tcra and Rib1. Therefore, Carg1 is probably located within a 17 cM segment of chromosome 14, within approximately 4 cM of the other two genes.

Animals↗

The structural gene for F liver protein (Flp) maps to chromosome 5 of the mouse.

The BXD and AKXL panels of recombinant inbred mouse strains have been typed for the F liver protein alloantigen. The structural gene for F liver protein gene (Flp) is placed on the distal part of chromosome 5, between the known markers Bcd-1 and Gus-s. This excludes the possibility that F liver protein is a major histocompatibility complex molecule, and in turn raises a question about the uniqueness of F and certain other proteins as purgers of self-reactivity among T but not B cells. The typed RI strains have then been used for the immunogenetic studies presented in the succeeding article.

Animals↗

Mapping a chromosomal locus for valproic acid-induced exencephaly in mice.

Human neural tube defects (NTDs) are among the most common congenital defects. They have a highly heterogeneous etiology, and, in addition to those seen in association with genetic syndromes, there are also NTDs induced by pharmaceutical compounds in utero, such as the widely used anti-epileptic drug valproic acid (VPA). Although familial studies have suggested a genetic contribution to VPA-induced NTDs, this trait has not been adequately studied, nor have the responsible genetic factors been identified. We generated a series of mouse crosses and backcrosses using the highly inbred SWV/Fnn and C57BL/6J strains, in order to identify possible chromosomal loci contributing to VPA sensitivity. When exposed to a high dose of sodium VPA (600 mg/kg) via maternal intraperitoneal injection on gestational day E8.5, the fetuses manifested exencephaly in a strain-dependent manner. Our data show an autosomal recessive trait, plus a gender-related effect or an overall X-Chromosome (Chr) effect, as being primarily responsible for determining sensitivity to VPA-induced exencephaly. Genome scanning and further linkage analysis of 131 exencephalic backcross fetuses identified a major locus linked to D7Mit285 (p < 2 x 10(-6)), exceeding the threshold for significant linkage. These results suggest a major chromosomal locus associated with the sensitivity to VPA-induced exencephaly in mice.

Animals↗