Document Detail

Neonatal protein C: molecular composition and distribution in normal term infants.
MedLine Citation:
PMID:  2595675     Owner:  NLM     Status:  MEDLINE    
Protein C (PC) is a vitamin K-dependent serine protease which functions as the central regulatory protein with both anticoagulant and profibrinolytic properties. The PC levels in healthy term newborns are approximately one third of adult levels. Severely decreased levels of PC are seen in sick term and preterm infants. These neonates appear to have an increased incidence of thrombosis. Undetectable levels of PC are found in homozygous PC deficient infants with DIC and purpura fulminans symptoms. In this present study we report the composition and distribution of PC in term newborn and compare the results with adult values. Plasma was obtained from placental cord blood of 20 healthy term (38-42 weeks gestation) infants. PC was immunopurified, run on SDS-PAGE, and immuno-blotted. The composition of the PC molecule in neonatal plasma is identical to that seen in adults. Using densitometry to determine the distribution of the PC components, we observed a 2-fold increase in single chain PC in the neonate as compared to the adult. In the neonate, there was an inverse correlation between the level of total PC antigen and the amount of single chain. These findings suggest the possibility that the processing of PC may be developmentally influenced.
B S Greffe; R A Marlar; M J Manco-Johnson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Thrombosis research     Volume:  56     ISSN:  0049-3848     ISO Abbreviation:  Thromb. Res.     Publication Date:  1989 Oct 
Date Detail:
Created Date:  1990-01-25     Completed Date:  1990-01-25     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0326377     Medline TA:  Thromb Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  91-8     Citation Subset:  IM    
Department of Pediatrics, University of Colorado Health Sciences Center, Denver 80262.
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MeSH Terms
Fetal Blood / analysis*
Infant, Newborn
Molecular Weight
Protein C / analysis*
Thrombosis / etiology
Grant Support
Reg. No./Substance:
0/Protein C

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