Postnatal dietary fat influences mRNAS involved in myelination.
The synthesis and composition of myelin in the developing mouse central nervous system can be influenced by diet. Postnatal maternal fat intake altered nursing pup brain and liver fatty acid composition. Peak (day 21) proteolipid protein (PLP) and myelin basic protein (MBP) mRNA levels were reduced when pups were nursed by mothers fed a fat-free or 5% coconut oil diet. This effect was reversed by feeding a corn oil based diet. Oleic acid accounts for about 30% of myelin fatty acids. mRNA levels of stearoyl CoA desaturase (SCD), the rate-limiting step in oleic acid synthesis, increase in neonatal mouse brain. Postnatal maternal fat-free feeding reduced day 21 pup brain SCD and LDL receptor, but not apolipoprotein (Apo E) E mRNA levels. In contrast to brain, nursing pup hepatic SCD mRNA levels were induced, LDL receptor mRNA levels were unaffected and Apo E mRNA levels were reduced by postnatal maternal fat-free feeding. Myelin-specific mRNA levels are developmentally regulated and influenced by dietary fat. Neonatal brain SCD and LDL receptor mRNA levels are also altered by neonatal fat intake. The neonatal response to dietary fat is tissue-specific at the mRNA level.
Department of Veterinary Pathobiology, Ohio State University, Columbus 43210.
J W
JW
DeWille
S J
SJ
Farmer
D000818:Animals; D000833:Animals, Suckling / Q000254:growth & development / Q000378:metabolism*; D001057:Apolipoproteins E / Q000096:biosynthesis* / Q000235:genetics; D001835:Body Weight / Q000187:drug effects; D001921:Brain / Q000187:drug effects / Q000254:growth & development*; D000074263:Coconut Oil; D003314:Corn Oil / Q000008:administration & dosage; D004041:Dietary Fats / Q000494:pharmacology*; D005227:Fatty Acids / Q000378:metabolism; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects*; D007774:Lactation; D008099:Liver / Q000254:growth & development / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C / Q000254:growth & development / Q000378:metabolism; D009186:Myelin Sheath / Q000187:drug effects / Q000502:physiology*; D019301:Oleic Acid; D009829:Oleic Acids / Q000378:metabolism; D009928:Organ Specificity; D010938:Plant Oils / Q000008:administration & dosage; D012333:RNA, Messenger / Q000096:biosynthesis*; D011973:Receptors, LDL / Q000096:biosynthesis* / Q000235:genetics; D013230:Stearoyl-CoA Desaturase / Q000096:biosynthesis* / Q000235:genetics
D001057:Apolipoproteins E; D004041:Dietary Fats; D005227:Fatty Acids; D009829:Oleic Acids; D010938:Plant Oils; D012333:RNA, Messenger; D011973:Receptors, LDL; D019301:Oleic Acid; D003314:Corn Oil; D013230:Stearoyl-CoA Desaturase; D000074263:Coconut Oil