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Growth Retardation and Abnormal Maternal Behavior in Mice Lacking Testicular Orphan Nuclear Receptor 4
Loretta L. Collins, Yi-Fen Lee, Cynthia A. Heinlein, Ning-Chun Liu, Yei-Tsung Chen, Chih-Rong Shyr, Charles K. Meshul, Hideo Uno, Kenneth A. Platt, Chawnshang Chang and Henry Lardy
Proceedings of the National Academy of Sciences of the United States of America
Vol. 101, No. 42 (Oct. 19, 2004), pp. 15058-15063
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/3373576
Page Count: 6
You can always find the topics here!Topics: Mice, Female animals, Maternal behavior, Pups, Dams, Reproduction, Growth retardation, Embryos, Genotypes, Mammary glands
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Testicular orphan nuclear receptor 4 (TR4) is a member of the nuclear receptor superfamily for which a ligand has not yet been found. In vitro data obtained from various cell lines suggest that TR4 functions as a master regulator to modulate many signaling pathways, yet the in vivo physiological roles of TR4 remain unclear. Here, we report the generation of mice lacking TR4 by means of targeted gene disruption ( TR4-/-). The number of TR4-/- pups generated by the mating of TR4+/- mice is well under that predicted by the normal Mendelian ratio, and TR4-/- mice demonstrate high rates of early postnatal mortality, as well as significant growth retardation. Additionally, TR4-/- females show defects in reproduction and maternal behavior, with pups of TR4-/- dams dying soon after birth with no indication of milk intake. These results provide in vivo evidence that TR4 plays important roles in growth, embryonic and early postnatal pup survival, female reproductive function, and maternal behavior.
Proceedings of the National Academy of Sciences of the United States of America © 2004 National Academy of Sciences