obsolete lutheran null (obsolete MONDO:0044257)
OBSOLETE. Autosomal recessive inheritance of the Lutheran null blood group phenotype is extremely rare, and has been reported in only 5 individuals. There is no obvious associated clinical or hematologic pathology, and all patients have been identified through identification of anti-Lu3 antibodies in their serum ({4:Karamatic Crew et al., 2007}).nnThe Lutheran inhibitor blood group phenotype (In(Lu); OMIM:111150) is characterized phenotypically by the apparent absence of the Lu antigen on red blood cells during serologic tests, i.e. Lu(a-b-). Since it is inherited as an autosomal dominant trait, it was initially postulated to result from an inhibitor of the Lu antigen. However, {7:Singleton et al. (2008)} found that the phenotype results from a mutation in the transcription factor KLF1 that regulates expression of the BCAM gene. These 2 forms of Lutheran absence on red blood cells can be differentiated both by the pedigree and by serologic studies.nnAn X-linked recessive form (OMIM:309050) has been rarely reported.
blood group, Lutheran null
exact