Rescue of Embryonic Lethality in Reduced Folate Carrier-deficient Mice by Maternal Folic Acid Supplementation Reveals Early Neonatal Failure of Hematopoietic Organs

Rongbao Zhao, Robert G. Russell, Yanhua Wang, Laibin Liu, Feng Gao, Burkhard Kneitz, Winfried Edelmann, I. David Goldman

Research output: Contribution to journalArticlepeer-review

99 Scopus citations

Abstract

The reduced folate carrier (RFC1) is an important route by which the major blood folate, 5-methyltetrahydrofolate, is transported into mammalian cells. In this study we determined the consequences of inactivation of RFC1 in mice by homologous recombination. While RFC1-/- embryos died in utero before embryonic day 9.5 (E9.5), near-normal development could be sustained in RFC1-/- embryos examined at E18.5 by supplementation of pregnant RFC1+/- dams with 1-mg daily subcutaneous doses of folic acid. About 10% of these animals went on to live birth but died within 12 days. These RFC1-/- mice showed a marked absence of erythropoiesis in bone marrow, spleen, and liver along with lymphoid depletion in the splenic white pulp and thymus. In addition, there was some impairment of renal and seminiferous tubule development. These data indicate that in the absence of RFC1 function, neonatal animals die due to failure of hematopoietic organs.

Original languageEnglish (US)
Pages (from-to)10224-10228
Number of pages5
JournalJournal of Biological Chemistry
Volume276
Issue number13
DOIs
StatePublished - Mar 30 2001

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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