Blood-type and age affect human plasma levels of histidine-rich glycoprotein in a large population.
Histidine-rich glycoprotein (HRG) is an alpha2-glycoprotein that was first described by Heimberger, et al, in 1972. Today, HRG is generally regarded as a mild prothrombotic protein. Blood samples of 585 individuals were collected with the aid of the Alameda-Contra Costa Medical Association (ACCMA) Blood Bank, Oakland, CA. Sex, age, ethnic origin, and blood-type information were available for each sample. The blood was processed to isolate the cell free plasma, and plasma HRG concentration was measured relative to that of a normal pool through a modified Laurell technique. Among Caucasian individuals, the mean HRG level of blood-type AB subjects, 125 +/- 28%, was found to be significantly greater than the means for subjects with A and O blood-types, 103 +/- 35% and 105 +/- 30% respectively (P = .0246). In addition, the average HRG level appears to increase linearly with age. The mean plasma level of HRG in subjects 50-59 years old was significantly greater than the level in subjects 30-39 years old (P = .0020). The correlation observed between blood-type and plasma HRG level in this study supports previously reported results that indicate significant genetic control over the plasma level of this protein. The age and blood-type based correlations observed in this study raise the question of whether these variables need be addressed if HRG level were to be employed in a clinical setting as a diagnostic tool.
Drasin
T
T
Coagulation Center, Oakland, CA 94609, USA.
Sahud
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M
D000017:ABO Blood-Group System; D000328:Adult; D000367:Age Factors; D001798:Blood Proteins / Q000032:analysis*; D001800:Blood Specimen Collection; D005006:Ethnicity; D006801:Humans; D008875:Middle Aged; D011506:Proteins / Q000032:analysis*; D000099053:Histidine-Rich Glycoprotein
D000017:ABO Blood-Group System; D001798:Blood Proteins; D011506:Proteins; D000099053:Histidine-Rich Glycoprotein