Evidence for genetic heterogeneity in benign familial hematuria.
Benign familial hematuria (BFH: MIM141200) is an autosomal-dominant disease accounting for one-fifth of all hematuria of unknown cause in children. Previous observations suggest that BFH may be allelic to recessive Alport syndrome (AS: MIM 203780) with a mutation in the COL4A3/COL4A4 locus. However, it is not clear whether all cases of BFH are due to heterozygous mutation of COL4A3/COL4A4 genes. We report here the exclusion of linkage between BFH and COL4A3/COL4A4 loci at 2q35-37 in a restricted population from Sicily (Italy). Total lod score is -9.6 at theta 0. Furthermore, in some cases exclusion of linkage is evident even considering single families. We conclude that BFH is genetically heterogeneous.
Piccini
M
M
Genetica Medica, Policlinico Le Scotte, Siena, Italy.
Casari
G
G
Zhou
J
J
Bruttini
M
M
Volti
S L
SL
Ballabio
A
A
Renieri
A
A
D000328:Adult; D005260:Female; D005799:Genes, Dominant; D018740:Genetic Heterogeneity; D008040:Genetic Linkage; D005819:Genetic Markers; D006417:Hematuria / Q000235:genetics*; D006801:Humans; D008126:Lod Score; D008297:Male; D009394:Nephritis, Hereditary / Q000175:diagnosis; D010375:Pedigree; D012802:Sicily / Q000453:epidemiology
D005819:Genetic Markers