title: Rat neural stem cell proliferation and differentiation are durably altered by the in utero polyunsaturated fatty acid supply.
abstract: We isolated neural stem cells/neural progenitors (NSC) from 1-day-old rat pups born to mothers fed diets that were deficient or supplemented with n-3 polyunsaturated fatty acids (PUFAs) and compared their proliferation and differentiation in vitro. The cells isolated from the n-3PUFA-deficient pups consistently proliferated more slowly than cells that were isolated from n-3PUFA-supplemented pups, despite the fact that both were cultured under the same conditions. The differences in the proliferation rates were evaluated up until 40 days of culture and were highly significant. When the cells were allowed to differentiate, the deficient cells exhibited a higher degree of neuronal maturation in response to the addition of PUFAs in the medium, as demonstrated by an increase in neurite length, whereas the neurons derived from the supplemented pups showed no change. This result was consistent, regardless of the age of the culture. The properties of the NSC were durably modified throughout the length of the culture, although the membrane phospholipid compositions were similar. We examined the differential expression of selected mRNAs and micro RNAs. We found significant differences in the gene expression of proliferating and differentiating cells, and a group of genes involved in neurogenesis was specifically modified by n-3 PUFA treatment. We conclude that n-3 PUFA levels in the maternal diet can induce persistent modifications of the proliferation and differentiation of NSCs and of their transcriptome. Therefore, the n-3 supply received in utero may condition on a long-term basis cell renewal in the brain.
authors.affiliation: INRA, UR 909, Unité de Nutrition et Régulation Lipidique des fonctions Cérébrales (NuRéLiCe), 78352 Jouy en Josas Cedex, France.
authors.forename: Bénédicte
authors.initials: B
authors.lastname: Goustard-Langelier
authors.forename: Mélanie
authors.initials: M
authors.lastname: Koch
authors.forename: Monique
authors.initials: M
authors.lastname: Lavialle
authors.forename: Christine
authors.initials: C
authors.lastname: Heberden
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D002454:Cell Differentiation / Q000187:drug effects* / Q000235:genetics; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004281:Docosahexaenoic Acids / Q000494:pharmacology; D005231:Fatty Acids, Unsaturated / Q000494:pharmacology*; D005260:Female; D005786:Gene Expression Regulation; D039382:Maternal Nutritional Physiological Phenomena; D035683:MicroRNAs; D058953:Neural Stem Cells / Q000166:cytology / Q000187:drug effects*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D012333:RNA, Messenger; D051381:Rats; D017208:Rats, Wistar
chemical_list: D005231:Fatty Acids, Unsaturated; D035683:MicroRNAs; D012333:RNA, Messenger; D004281:Docosahexaenoic Acids