Faculty Collaboration Database

Mechanical-tactile stimulation (MTS) during neonatal stress prevents hyperinsulinemia despite stress-induced adiposity in weanling rat pups. Early Hum Dev 2011 Mar;87(3):159-63

Date

01/08/2011

Pubmed ID

21211914

Pubmed Central ID

PMC3228309

DOI

10.1016/j.earlhumdev.2010.12.001

Scopus ID

2-s2.0-79951772908 (requires institutional sign-in at Scopus site)   10 Citations

Abstract

Stress in early life negatively influences growth quality through perturbations in body composition including increased fat mass. At term (40 weeks) preterm infants have greater fat mass and abdominal visceral adipose tissue than term-born infants. Mechanical-tactile stimulation (MTS) attenuates the stress response in preterm infants and rodents. We tested the hypothesis that MTS, administered during an established model of neonatal stress, would decrease stress-driven adiposity and prevent associated metabolic imbalances in rat pups. Pups received one of three treatments from postnatal days 5 to P9: Neonatal Stress (Stress; n=20) = painful stimulus and hypoxic/hyperoxic challenge during 60 min of maternal separation; MTS (n=20) = neonatal stress+10 min of MTS; or Control (n=20). Body weight, DXA whole body fat mass (g), MRI subcutaneous and visceral adipose tissue, and fasting adiponectin, leptin, glucose, insulin, and corticosterone were measured at weaning (P21). Stress and MTS weight gain (g/d) were accelerated following neonatal stress with greater fat mass, abdominal subcutaneous adipose tissue, serum adiponectin, leptin, and fasting glucose at weaning (P21). Male Stress and MTS pups had greater visceral adipose tissue depot. Male and female Stress pups were hyperinsulinemic. In summary, neonatal stress compromised body composition by increasing fat mass and abdominal subcutaneous adipose tissue depot, and in males, visceral adipose tissue depot. Importantly, MTS prevented hyperinsulinemia despite of stress-induced adiposity. We conclude that MTS during neonatal stress has the potential to minimize metabolic consequences associated with stress-driven perturbations in fat mass and abdominal adipose depots.

Author List

Moyer-Mileur LJ, Haley S, Gulliver K, Thomson A, Slater H, Barrett B, Joss-Moore LA, Callaway C, McKnight RA, Moore B, Lane RH

MESH terms used to index this publication - Major topics in bold

Absorptiometry, Photon
Adiponectin
Animals
Animals, Newborn
Blood Glucose
Body Composition
Body Weight
Corticosterone
Female
Hyperinsulinism
Intra-Abdominal Fat
Leptin
Magnetic Resonance Imaging
Male
Rats
Rats, Sprague-Dawley
Stress, Physiological
Touch