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ArtikelDietary folate, but not choline, modifies neural tube defect risk in Shmt1 knockout mice  
Oleh: Beaudin, Anna E ; Abarinov, Elena V. ; Malysheva, Olga ; Perry, Cheryll A
Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 95 no. 01 (Jan. 2012), page 109-114 .
Topik: VITAMINS; Minerals; Phytochemicals
Fulltext: A07 v95 n1 p109 kelik2022.pdf (151.24KB)
  • Perpustakaan FK
    • Nomor Panggil: A07.K.2012.01
    • Non-tandon: 1 (dapat dipinjam: 0)
    • Tandon: tidak ada
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Isi artikelBackground: Low dietary choline intake has been proposed to increase the risk of neural tube defects (NTDs) in human populations. Mice with reduced Shmt1 expression exhibit a higher frequency of NTDs when placed on a folate- and choline-deficient diet and may represent a model of human NTDs. The individual contribution of dietary folate and choline deficiency to NTD incidence in this mouse model is not known. Objective: To dissociate the effects of dietary folate and choline deficiency on Shmt1-related NTD sensitivity, we determined NTD incidence in embryos from Shmt1-null dams fed diets deficient in either folate or choline. Design: Shmt1+/+ and Shmt1-/- dams were maintained on a standard AIN93G diet (Dyets), an AIN93G diet lacking folate (FD), or an AIN93G diet lacking choline (CD). Virgin Shmt1+/+ and Shmt1-/- dams were crossed with Shmt1+/- males, and embryos were examined for the presence of NTDs at embryonic day (E) 11.5 or E12.5. Results: Exencephaly was observed only in Shmt1-/- embryos isolated from dams maintained on the FD diet (P = 0.004). Approximately 33% of Shmt1-/-embryos (n = 18) isolated from dams maintained on the FD diet exhibited exencephaly. NTDs were not observed in any embryos isolated from dams maintained on the CD (n = 100) or control (n = 152) diets or in any Shmt1+/+ (n = 78) or Shmt1+/- embryos (n = 182). Conclusion: Maternal folate deficiency alone is sufficient to induce NTDs in response to embryonic Shmt1 disruption.
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