Immunologic studies of prothrombin in newborns.

Abstract:

:Prothrombin of newborns was investigated by means of the quantitative immunoelectrophoresis and the two-dimensional immunoelectrophoresis. The plasma of 10 of 24 healthy term newborns and of 5 preterm infants taken immediately after birth showed one prothrombin precipitate in the alpha-2-beta-globulin position when a buffer containing 25 mM calcium lactate was used. No differences in the mobility and form of the precipitate could be observed as compared to healthy adults. The plasma of the other 14 term newborns and one small-for-date infant showed two precipitates, one in the alpha-2-beta-globulin position and a second in the alpha-1-globulin position. Twenty-four hr after the injection of vitamin K, the precipitate in alpha-1-globulin position was no longer evident. When a buffer without calcium was used in the two-dimensional immunoelectrophoresis, only one precipitate in the alpha-1-globulin position was found in all newborns. In the quantitative immunologic determination, the prothrombin was found to be decreased as compared to that of adults. The quantitative immunologic determination and the activity assay gave equal results in those infants who had only one precipitate in the two dimensional immunoelectrophoresis. In those newborns, who had two precipitates, the quantitative immunologic determination gave higher results than the measurement of the activity assay. From this study, no evidence of differences between the prothrombin of newborns and that of adults could be derived. Vitamin K deficiency, as judged from the appearance of a second peak in alpha-1-globulin position in the two dimensional immunoelectrophoresis was a frequent findings in term newborns, even on the 1st day of life.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Muntean W,Petek W,Rosanelli K,Mutz ID

doi

10.1203/00006450-197911000-00011

subject

Has Abstract

pub_date

1979-11-01 00:00:00

pages

1262-5

issue

11

eissn

0031-3998

issn

1530-0447

journal_volume

13

pub_type

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