Utero-placental transfer of alternate energy substrates and glucose homeostasis in the newborn pig
In the first experiment, three sows in late gestation were infused with (/sup 14/C)..beta..-hydroxybutyrate to evaluate utero-placental transfer of ketones. ..beta..-Hydroxy-butyrate (BOHB) concentrations were low in both the mother and fetus throughout the experiments (0.0189, 0.0197, 0.0054, and 0.0063 mmole/liter blood for UV, UA, FV, and FA, respectively). Radioactive BOHB was detected in fetal blood within two minutes post-injection. Lipid extracts of liver and adipose tissue exhibited the greatest relative incorporation of (/sup 14/C)..beta..-hydroxybutyrate followed by lung and heart tissues (3540, 3674, 1214, and 528 dpm/g wet weight, respectively). In a second study, five gravid gilts during late gestation were used to determine utero-placental transfer of maternal free fatty acids (FFA). Using similar techniques as Exp. 1, injections were given containing (/sup 14/C) linoleic acid and (/sup 3/H) palmitic acid or (/sup 14/C) octanoic acid. In a third experiment, gravid gilts were fed supplemental energy as starch (C), soybean oil (SO) or medium-chain triglycerides (MCT) during late gestation to determine the influence on colostrum composition and neonatal pig glucose homeostasis. Energy content of colostrum was increased (P = 0.05 by feeding SO and MCT. After a 36 h fast, mean piglet glucose concentrations were higher (P < 0.05) for MCT pigs. Glucose and creatinine levels showed quadratic effects, while FFA and blood urea nitrogen (BUN) exhibited cubic patterns during the fasting period. Although creatine levels were similar, BUN concentrations were higher (P < 0.01) for MCT progeny.
- Research Organization:
- Kansas State Univ., Manhattan (USA)
- OSTI ID:
- 5887170
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBOXYLIC ACIDS
MEMBRANE TRANSPORT
GLUCOSE
HOMEOSTASIS
KETONES
ADIPOSE TISSUE
CARBON 14 COMPOUNDS
LIVER
PLACENTA
SWINE
TRACER TECHNIQUES
TRITIUM COMPOUNDS
UTERUS
ALDEHYDES
ANIMAL TISSUES
ANIMALS
BODY
CARBOHYDRATES
CONNECTIVE TISSUE
DIGESTIVE SYSTEM
DOMESTIC ANIMALS
FEMALE GENITALS
FETAL MEMBRANES
GLANDS
HEXOSES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MAMMALS
MEMBRANES
MONOSACCHARIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANS
SACCHARIDES
TISSUES
VERTEBRATES
550201* - Biochemistry- Tracer Techniques