Elevation of plasma lathosterol, as an indicator of increased cholesterol synthesis, in preterm (23-32 weeks gestation) infants given Intralipid.

Abstract:

:Hypercholesterolemia is common in preterm infants administered 10% Intralipid perhaps because of excess phospholipid in plasma causing efflux of cholesterol from tissues. The purpose of this study was to determine if cholesterol synthesis (as measured by plasma lathosterol) is increased in preterm infants (23-32 wk gestation) during infusion of up to 4 g 10% Intralipid/kg body wt/d. Two groups of infants were studied. Intralipid intake was compared to: 1) plasma cholesterol in blood sampled over the first 100 d of life (preliminary study, n = 22) and 2) plasma cholesterol, lathosterol, and apo AI and B in blood taken at birth (cord), d 3-4 of life, and at least three additional times over the next 25 d (lathosterol study, n = 22). Lathosterol was quantitated by gas liquid chromatography and apo AI and B by immunoprecipitation. In the preliminary study, plasma cholesterol levels rose (to 4.06-10.70 mM) with Intralipid administration. Infants who received less than 2 g Intralipid/kg body wt/d were not hypercholesterolemic. In the lathosterol study, plasma cholesterol increased (1.86-2.24 mM, p = 0.06) and apo AI and B did not change, but lathosterol and the cholesterol:lathosterol ratio decreased (5.24-2.88 microM, p = 0.01, and 284-124 10(2) x mmol lathosterol:mol cholesterol, p = 0.007, respectively) from birth to d 3-4 (n = 11 paired samples). Infants followed longitudinally had increased cholesterol and lathosterol (4- to 7-fold) with increasing Intralipid administration, which decreased after discontinuation of infusion. Apo AI and B decreased upon Intralipid infusion.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Hamilton JJ,Phang M,Innis SM

doi

10.1203/00006450-199202000-00020

subject

Has Abstract

pub_date

1992-02-01 00:00:00

pages

186-92

issue

2

eissn

0031-3998

issn

1530-0447

journal_volume

31

pub_type

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