TY - JOUR
T1 - Rescue of Embryonic Lethality in Reduced Folate Carrier-deficient Mice by Maternal Folic Acid Supplementation Reveals Early Neonatal Failure of Hematopoietic Organs
AU - Zhao, Rongbao
AU - Russell, Robert G.
AU - Wang, Yanhua
AU - Liu, Laibin
AU - Gao, Feng
AU - Kneitz, Burkhard
AU - Edelmann, Winfried
AU - Goldman, I. David
PY - 2001/3/30
Y1 - 2001/3/30
N2 - 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.
AB - 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.
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U2 - 10.1074/jbc.C000905200
DO - 10.1074/jbc.C000905200
M3 - Article
C2 - 11266438
AN - SCOPUS:0035971190
SN - 0021-9258
VL - 276
SP - 10224
EP - 10228
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 13
ER -