title: Compound heterozygous complement C3 deficiency.
abstract: Complete deficiency of the third component of the complement system is a result of defects in the two alleles of the C3 gene. In this study a family with C3 deficiency is reported; the parents expressed a distinct abnormality of the C3 gene and their two children had compound heterozygous C3 deficiency. These are the first reported cases of compound heterozygous complement deficiency. Our results indicate that the maternal abnormality leads to synthesis of an abnormal proC3 protein which is not secreted from the cells. The paternal abnormality results in ablation of synthesis of the proC3 protein.
authors.affiliation: Unit of Allergy and Immunology, Assaf Harofeh Medical Center, Tel Aviv, Israel.
authors.forename: Y
authors.initials: Y
authors.lastname: Katz
authors.forename: R A
authors.initials: RA
authors.lastname: Wetsel
authors.forename: M
authors.initials: M
authors.lastname: Schlesinger
authors.forename: Z
authors.initials: Z
authors.lastname: Fishelson
mesh_terms: D001345:Autoradiography; D003176:Complement C3 / Q000096:biosynthesis / Q000172:deficiency* / Q000235:genetics / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D005192:Family Health; D005260:Female; D005347:Fibroblasts / Q000276:immunology; D006579:Heterozygote; D006801:Humans; D008297:Male; D011498:Protein Precursors / Q000096:biosynthesis
chemical_list: D003176:Complement C3; D011498:Protein Precursors