Congenital hypothyroid Pax8-/- mutant mice can be rescued by inactivating the TRα gene

被引:155
作者
Flamant, F
Poguet, AL
Plateroti, M
Chassande, O
Gauthier, K
Streichenberger, N
Mansouri, A
Samarut, J
机构
[1] Ecole Normale Super Lyon, Biol Cellulaire & Mol Lab, CNRS, UMR 5665,INRA LA 913, F-69364 Lyon 07, France
[2] Univ Lyon 1, Fac Med Laennec, Lab Histol & Embryol Mol, F-69372 Lyon 08, France
[3] Max Planck Inst Biophys Chem, Dept Mol Cell Biol, D-37077 Gottingen, Germany
关键词
D O I
10.1210/me.16.1.24
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Mice devoid of all TRs are viable, whereas Pax8(-/-)mice, which lack the follicular cells producing T-4 and T-3 in the thyroid gland, die during the first weeks of postnatal life. A precise comparison between the two types of mutants reveals that their phenotypes are similar, but the defects in spleen, bone, and small intestine are more pronounced in Pax(-/-) mice. This is interpreted as the result of a negative effect of the unliganded TR on thyroid hormone target genes expression in the Pax(-/-)mutants. Pax8(-/-) compound mutants can survive to adulthood, and the expression of target genes is partially restored. This demonstrates the importance of TR alpha aporeceptor activity in several aspects of postnatal development.
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页码:24 / 32
页数:9
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