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Decreased expression of kisspeptin mediates acute immune/inflammatory stress-induced suppression of gonadotropin secretion in female rat

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Abstract

Kisspeptin and its corresponding receptor, the G protein-coupled receptor 54, play an important role in reproductive systems. It has been suggested that reproductive disorders in metabolically disrupted animals are caused by the alteration of hypothalamic KiSS-1 systems. Immune/inflammatory challenge is also known to disrupt reproductive function. However, the effects of immune/inflammatory challenge on KiSS-1 systems have not been investigated. In this study, we showed that lipopolysaccharide (LPS) injection decreased hypothalamic KiSS-1 mRNA expression as well as plasma LH levels in ovariectomized rats. Indomethacin completely blocked the suppressive effects of LPS on LH secretion and KiSS-1 mRNA level. Furthermore, we showed that iv injection of kisspeptin increased plasma LH levels in LPS-administrated rats to the same degree as in saline-injected rats. These results suggest that KiSS-1 systems are sensitive to immune/inflammatory challenge conditions and transmit these signals into the central reproductive system.

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Authors and Affiliations

  1. Department of Obstetrics and Gynecology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, 770-8503, Japan

    T. Iwasa, T. Matsuzaki, M. Murakami, F. Shimizu, A. Kuwahara, T. Yasui & M. Irahara

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  1. T. Iwasa
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  2. T. Matsuzaki
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  3. M. Murakami
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  4. F. Shimizu
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  5. A. Kuwahara
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  6. T. Yasui
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  7. M. Irahara
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Correspondence to T. Iwasa.

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Iwasa, T., Matsuzaki, T., Murakami, M. et al. Decreased expression of kisspeptin mediates acute immune/inflammatory stress-induced suppression of gonadotropin secretion in female rat. J Endocrinol Invest 31, 656–659 (2008). https://doi.org/10.1007/BF03345620

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  • DOI: https://doi.org/10.1007/BF03345620

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