PubMed · 14486245
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L L PHILLIPS, W A LITTLE. 1962. Factor V deficiency in obstetrics.. https://pubmed.ncbi.nlm.nih.gov/14486245/
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Combined deficiency of both coagulation factors (F)V and VIII is a rare autosomal recessive bleeding disorder caused by null expression of LMAN1 (previously termed ERGIC-53) in a majority of affected individuals. Previously, a requirement for a functional LMAN1 cycling pathway between the ER and Golgi was demonstrated for efficient secretion of FV and FVIII (Moussalli et al. J Biol Chem 1999; 274: 32569), however, the molecular nature of the interaction between LMAN1 and its cargo was not characterized. Using coimmunoprecipitation of LMAN1 and FVIII from transfected HeLa and COS-1 cells, we demonstrate an interaction between LMAN1 and FVIII in vivo. The interaction was mediated via high mannose-containing asparagine-linked oligosaccharides that are densely situated within the B domain of FVIII, as well as protein-protein interactions. These results are interpreted based on the recent determination of the crystal structure of the carbohydrate recognition domain of LMAN1.
Combined deficiency of factor V and factor VIII is a distinct clinical entity and is an autosomal recessive disorder. Recently identification of the gene, the endoplasmic reticulum-Golgi intermediate compartment (ERGIC-53), responsible for combined factor V-factor VIII deficiency and mutations of the ERGIC-53 gene in affected patients have been reported. In this report we analyzed two Japanese patients with combined factor V-factor VIII deficiency by genomic polymerase chain reaction and sequencing analysis. In one patient we found a point mutation of C to T at nucleotide 604 in exon 5, resulting in a transition of arginine to stop codon, which was reported in previous reports. The DdeI digestion study demonstrated that this patient is homozygous for this nonsense mutation. In the other patient we found no mutation in the ERGIC-53 gene in analysis of the entire coding region and the intron/exon junctions, which is also consistent with the previous reports, suggesting the possibility of defects at other genetic loci.
In a 7-year retrospective analysis (1991-97) of the records of the Department of Haematology, Regional Laboratory and Blood Bank (Dammam), 54 patients from all parts of Saudi Arabia's Eastern Province were diagnosed with hereditary coagulation factor deficiencies. The largest group of patients, 42 haemophiliacs, included 4 non-Saudi patients. There were 39 haemophilia A or factor VIII deficiency patients, 2 haemophilia B or factor IX deficiency patients and 1 combined factor VIII and V deficiency patient. There were 5 Saudi patients with probable factor XIII deficiency, and 7 patients, all but one who were Saudi, had von Willebrand disease. The distribution of haemophilia patients in Eastern Province showed some differences compared with those reported from Riyadh and from Western countries. Among Saudis in Eastern Province, the number with suspected factor XIII deficiency, although low, was higher than that reported for other regions. The number of patients with haemophilia B and von Willebrand disease was lower than expected, when compared with the number of haemophilia A cases.