Familial juvenile gouty nephropathy (FJGN, MIM 162000) is an autosomal-dominant renal disease characterized by underexcretion-type hyperuricemia, gouty arthritis, and progressive renal disease at younger ages. We analyzed the localization of the responsible gene for FJGN concerning the chromosomal region of 16p12 using parametric linkage analysis in our FJGN.
The affected members of this family were accompanied with polyuria due to nephrogenic diabetes insipidus and without hypertension. Fifteen samples were collected from 9 affected and 6 nonaffected members of the family. By using microsatellite markers mainly focused on the short arm of chromosome 16, two point and multipoint linkage analyses were carried out.
All of the 2-point logarithm of odds (LOD) scores were typically negative and all of the multipoint LOD scores were less than -3.0 in our FJGN family.
The results suggested that the localization of the responsible gene to 16p12 can be excluded in our FJGN family. This finding means that the responsible gene for FJGN is not common.