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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Iron deficiency anaemia in newborn sla mice: a genetic defect of placental iron transport.

Newborn mice with X-linked anaemia (gene symbol sla) have lower haemoglobin levels at birth than normal and carrier mice but there is considerable overlap. Serial observations showed that the haemoglobin values of segregating male mice separate into a bimodal distribution of 42 d of age, and 50 d values were used to assign genotypes retrospectively. The anaemia in newborn sla mice is attributable to iron deficiency, since their total body iron is lower than in normal newborn mice, while their birth weights are almost identical. Haemoglobin levels at birth in normal, anaemic and carrier mice are also influenced by the mother's genotype and phenotype, and the haemoglobin value was progressively lower according to the sla gene dose of the mother. Materno-fetal iron transfer was examined by labelling pregnant carrier females with radioiron in various ways. When given as single or intermittent doses by injection no clearcut differences emerged in apparent iron transfer to anaemic as compared to non-anaemic fetuses. However, when radioiron was administered continuously in food a significant reduction in iron transfer to anaemic fetuses was demonstrated. The sla gene is already known to have a major effect in reducing iron transport in the small intestine. The present studies provide evidence of an analogous defect in placental iron transport.[1]


  1. Iron deficiency anaemia in newborn sla mice: a genetic defect of placental iron transport. Kingston, P.J., Bannerman, C.E., Bannerman, R.M. Br. J. Haematol. (1978) [Pubmed]
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