Exogenous insulin reduces proteolysis and protein synthesis in extremely low birth weight infants.
Exogenous insulin reduces proteolysis and protein synthesis in extremely low birth weight infants.
复制标题
外源性胰岛素会减少极低出生体重婴儿的蛋白水解和蛋白质合成。
DOI:
10.1016/s0022-3476(98)70389-0
复制
发表时间:
1998
期刊:
影响因子:
--
通讯作者:
Denne,SC
中科院分区:
文献类型:
--
作者:
Poindexter,BB;Karn,CA;Denne,SC
ObjectiveTo determine the effect of a continuous insulin infusion on protein and glucose metabolism in extremely low birth weight (ELBW) infants.Study designWe measured the rate of appearance (Ra) of the essential amino acids leucine and phenylalanine (reflecting proteolysis), utilization of phenylalanine for protein synthesis, and glucose Ra using stable isotope tracers during a basal infusion of glucose (6 mg/kg/min) and in response to a continuous infusion of insulin (0.05 U/kg/hr) by means of the euglycemic hyperinsulinemic clamp technique. Four clinically stable, euglycemic ELBW infants (26 ± 0 weeks' gestation, 894 ± 44 gm birth weight, 2.8 ± 0.8 days of age) were studied.ResultsIn response to a greater than tenfold increase in insulin concentration (from 7 ± 2 to 79 ± 13 μU/ml), there was a 20% decrease in leucine Ra (Basal: 272 ± 27 μmol/kg/hr; Insulin: 226 ± 29 μmol/kg/hr; p < 0.01) and in phenylalanine Ra (Basal: 91 ± 5 μmol/kg/hr; Insulin: 72 ± 2 μmol/kg/hr; p < 0.05). Use of phenylalanine for protein synthesis also decreased by a similar magnitude (Basal: 77 ± 4 μmol/kg/hr; Insulin: 62 ± 1 μmol/kg/hr; p < 0.05). Glucose utilization doubled (from 8 ± 0.9 to 15.7 ± 1.1 mg/kg/min; p = 0.0003) and plasma lactate concentrations tripled (from 2.1 ± 0.5 to 5.7 ± 1.0 mmol/L; p < 0.05) during the insulin infusion.ConclusionsDuring an infusion of glucose alone, pharmacologic concentrations of insulin in ELBW infants produced no net protein anabolic effect. Furthermore, euglycemic hyperinsulinemia was accompanied by development of significant metabolic acidosis. (J Pediatr 1998;132:948-53)
登录
查看更多内容
DOI:
10.1152/ajpendo.1983.245.3.e308
发表时间:
1983
期刊:
The American journal of physiology
影响因子:
--
作者:
Tserng,KY;Kalhan,SC
通讯作者:
Kalhan,SC
影响因子:
5.1
作者:
BINDER, ND;RASCHKO, PK;REYNOLDS, JW
通讯作者:
REYNOLDS, JW
影响因子:
--
作者:
DENNE, SC;KALHAN, SC
通讯作者:
KALHAN, SC
DOI:
10.1152/ajpendo.1992.263.4.e696
发表时间:
1992
期刊:
The American journal of physiology
影响因子:
--
作者:
Liechty,EA;Boyle,DW;Moorehead,H;Liu,YM;Denne,SC
通讯作者:
Denne,SC
影响因子:
8
作者:
S. Ostertag;L. Jovanovič;B. Lewis;P. Auld
通讯作者:
P. Auld