Modulation of susceptibility to weight gain and insulin resistance in low birthweight rats by treatment of their mothers with leptin during pregnancy and lactation.
Int J Obes Relat Metab Disord
; 28(1): 129-36, 2004 Jan.
Article
de En
| MEDLINE
| ID: mdl-14557827
ABSTRACT
OBJECTIVES:
To investigate whether administration of leptin to rats during pregnancy and lactation affects placental 11beta-hydroxysteroid dehydrogenase (11beta-HSD2) activity and the susceptibility of their offspring to weight gain and insulin resistance.DESIGN:
Pregnant rats fed on a low-protein diet were administered leptin or saline by subcutaneous minipump from day 14 of gestation and throughout lactation. A further group was fed a normal diet and given saline. After weaning, the offspring of each group were fed on a normal diet until 6 weeks of age and then half of each group was transferred to a high-fat diet until 12 months of age.RESULTS:
Plasma leptin levels were raised two-fold on days 16-18 of pregnancy in the leptin-treated dams, but, despite a constant rate of infusion, at parturition they dipped to control levels before rising again. The activity of placental 11beta-HSD2 was reduced by the low-protein diet; this reduction was prevented by treating the dams with leptin. The male offspring of the saline-treated dams gained more weight and had higher plasma leptin levels on the high fat than the chow diet, but the offspring of the leptin-treated dams did not. Fasting blood glucose and intraperitoneal glucose tolerance at 6 and 12 months of age was unaffected by the high-fat diet, but only the offspring of the leptin-treated dams achieved this control without raised insulin levels.CONCLUSIONS:
The rate of leptin clearance appears to increase at parturition. The administration of leptin to rats during late pregnancy and lactation makes their male offspring less susceptible to high-fat-diet-induced weight gain and insulin resistance.
Recherche sur Google
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Poids de naissance
/
Insulinorésistance
/
Lactation
/
Prise de poids
/
Leptine
Limites:
Animals
/
Pregnancy
Langue:
En
Journal:
Int J Obes Relat Metab Disord
Année:
2004
Type de document:
Article
Pays d'affiliation:
Royaume-Uni