title: Maternal green tea extract supplementation to rats fed a high-fat diet ameliorates insulin resistance in adult male offspring.
abstract: Maternal overnutrition is associated with increased risk of metabolic disorders in the offspring. This study tested the hypothesis that maternal green tea (GT) supplementation can alleviate metabolic derangements in high-fat-diet-fed rats born of obese dams. Female Sprague-Dawley rats were fed low-fat (LF, 7%), high-fat (HF, 30%) or HF diet containing 0.75% or 1.0% GT extract (GT1, GT2) prior to conception and throughout gestation and lactation. Both doses of GT significantly improved metabolic parameters of HF-fed lactating dams (P<.05). Birth weight and litter size of offspring from HF dams were similar, but GT supplementation led to lighter pups on day 21 (P<.05). The weaned male pups received HF, GT1 or GT2 diet (dam/pup diet groups: LF/HF, HF/HF, HF/GT1, HF/GT2, GT1/HF and GT2/HF). At week 13, they had similar weight but insulin resistance index (IRI), serum nonesterified fatty acid (NEFA) and liver triglyceride of rats born to GT dams were 57%, 23% and 26% lower, accompanied by improved gene/protein expressions related to lipid and glucose metabolism, compared with the HF/HF rats (P<.05). Although HF/GT1 and HF/GT2 rats had lower serum NEFA, their insulin and IRI were comparable to HF/HF rats. This study shows that metabolic derangements induced by an overnourished mother could be offset by supplementing GT to the maternal diet and that this approach is more effective than giving GT to offspring since weaning. Hence, adverse effects of developmental programming are reversible, at least in part, by supplementing bioactive food component(s) to the mother's diet.
authors.affiliation: Food and Nutritional Science Division, School of Biological Sciences, The University of Hong Kong, Hong Kong, People's Republic of China.
authors.forename: Shiying
authors.initials: S
authors.lastname: Li
authors.forename: Iris M Y
authors.initials: IM
authors.lastname: Tse
authors.forename: Edmund T S
authors.initials: ET
authors.lastname: Li
mesh_terms: D054392:Adipokines / Q000097:blood; D000273:Adipose Tissue / Q000187:drug effects; D000367:Age Factors; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001835:Body Weight; D028241:Camellia sinensis; D059305:Diet, High-Fat / Q000009:adverse effects*; D019587:Dietary Supplements; D005230:Fatty Acids, Nonesterified / Q000378:metabolism; D005260:Female; D005786:Gene Expression Regulation; D007333:Insulin Resistance; D007774:Lactation; D008055:Lipids / Q000097:blood; D008099:Liver / Q000187:drug effects / Q000502:physiology; D008297:Male; D039382:Maternal Nutritional Physiological Phenomena; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism; D010936:Plant Extracts / Q000494:pharmacology*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D051381:Rats; D017207:Rats, Sprague-Dawley; D014280:Triglycerides / Q000378:metabolism
chemical_list: D054392:Adipokines; D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D008055:Lipids; D010936:Plant Extracts; D014280:Triglycerides