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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Reduced hepatic bilirubin uridine diphosphate glucuronyl transferase and uridine diphosphate glucose dehydrogenase activity in the human fetus.

Hepatic bilirubin uridine diphosphate glucuronyl transferase (UDPG-T) activity was 0.14 and 0.22 units in two fetuses aged 17 and 22 weeks, respectively, and less than 0.1 unit in 15 fetuses, aged 8--19 weeks compared to 0.68--1.99 units in 21 normal adults. Hepatic uridine diphosphate glucose dehydrogenase (UDPG-D) activity in 14 fetuses, aged 8--18 weeks, ranged from 6.2--15.0 units (mean = 11.3 +/- 0.7) compared to 28.8--49.2 units (mean = 39.6 +/- 2.5) in eight normal adults (P less than 0.001). There was no correlation between UDPG-D activity and gestational age. The hepatic UDPG-D activity was 16.5 units in a 33-day-old full term, female infant, 42.4 and 24.3 units in two 2-year-old infants, respectively, and 24.3 units in a 5.5-year-old child. In three human fetuses, the apparent Km UDPG was 0.54 x 10(-4) M. Thus, both hepatic bilirubin UDPG-T and UDPG-D activity are markedly reduced in the human fetus during the second trimester of gestation. Retarded development of hepatic UDPG-D may extend beyond the first month of life.[1]

References

  1. Reduced hepatic bilirubin uridine diphosphate glucuronyl transferase and uridine diphosphate glucose dehydrogenase activity in the human fetus. Felsher, B.F., Maidman, J.E., Carpio, N.M., VanCouvering, K., Woolley, M.M. Pediatr. Res. (1978) [Pubmed]
 
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