Female Infertility in grt Mice is Caused by Thyroid Hormone Deficiency, not by Insufficient TPST2 Activity in the Reproductive Organs(Laboratory Animal Science)
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概要
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The growtn-retarded (grt) mouse has an autosomai recessive hypothyroidism and the female shows lifelong infertility. we previously reported that these mutant phenotypes are caused by a deficiency in the enzymatic activity of tyrosylprotein sulfotransferase_2 (TPST2), and severe thyroid hypogenesis and consequent dwarfism are mainly due to the impairment of the tyrosine sulfation of thyroid-stimulating hormone receptor (TSHR) by TPST2. Although TPST2 is ubiquitously expressed and many proteins are predicted to be tyrosine sulfated and involved in many biological processes, the functional roles of tyrosine sulfation in the reproductive organs remain unclear. These findings tempted us to hypothesize two possible mechanisms underlying the infertility; a deficiency in TPST2 activity in the reproductive organs might cause the infertility in grt mice, or a significant decrease in serum thyroid hormones might impair the normal development of reproductive organs. When mutant female mice were fed a diet supplemented with sufficient thyroid powder to correct their growth retardation, the rate of copulation, pregnancy, and parturition was completely restored. Therefore, we concluded that the infertility in grt female is due to a thyroid hormone deficiency.
- 社団法人日本獣医学会の論文
- 2008-10-25
著者
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Agui Takashi
Laboratory Of Laboratory Animal Science And Medicine Department Of Disease Control Graduate School O
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Tachi Atsushi
Laboratory Of Public Health Graduate School Of Veterinary Medicine Hokkaido University
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SASAKI Nobuya
Laboratory of Experimental Animal Science, Graduate School of Veterinary Medicine, Hokkaido Universi
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Agui T
Laboratory Of Laboratory Animal Science And Medicine Department Of Disease Control Graduate School O
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HOSODA Yayoi
Laboratory of Laboratory Animal Science and Medicine, Department of Disease Control, Graduate School
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Hosoda Yayoi
Laboratory Of Laboratory Animal Science And Medicine Department Of Disease Control Graduate School O
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