Diego antigen system

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

The Diego blood group

History

The Diego system was discovered in 1955 in one Mrs. Diego when her child was found to suffer from HDN. The child was type Di^a. A second type Di^b was discovered in 1967 but the other types only began to be discovered in 1995. ^[1] , ^[2]

Definition

Blood is classified in the Diego system by the form of the band 3 protein, coded for by the gene SLC41A (Solute Carrier family 4, Anion exchanger, member 1). Each allele of the gene SLC41A is classified as a separate blood group. The band 3 protein functions in the transport of Cl^– and carbonate.

The system

There are 21 known Diego blood types, the most common is Di(a-b+); found in over 99.9% of Caucasians and Blacks, and in about 90% of Asians. Most of the remaining 10% of Asians are (a+b+). The cultural distribution of the blood group lends it some importance to the science of anthropology. ^[3]

References

↑ Blood Groups and Red Cell Antigens”NCBI
↑ M.S. Mallen & T. Arias. “Inheritance of Diego blood group in Mexican Indians” Science. 1959 Jul 17;130(3368):164-5 PMID: 13668547
↑ M. Layrisse & J. Wilbert “Absence of the Diego antigen, a genetic characteristic of early immigrants to South America. Science. 1961 Oct 13;134:1077-8./ PMID: 14463057

Template:WikiDoc Sources

[1] Blood Groups and Red Cell Antigens”NCBI

[2] M.S. Mallen & T. Arias. “Inheritance of Diego blood group in Mexican Indians” Science. 1959 Jul 17;130(3368):164-5 PMID: 13668547

[3] M. Layrisse & J. Wilbert “Absence of the Diego antigen, a genetic characteristic of early immigrants to South America. Science. 1961 Oct 13;134:1077-8./ PMID: 14463057

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