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Effect of Curcuma comosa and estradiol on the spatial memory and hippocampal estrogen receptor in the post-training ovariectomized rats

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Abstract

Curcuma comosa was reported to have uterotrophic effects in ovariectomized (OVX) rats. The present study aims to investigate the plant estrogenic-like effects of C. comosa hexane extract on spatial memory and estrogen receptors (ER) in the hippocampus. Female rats received 5 days’ Morris water maze training before the ovariectomy, followed by the daily intraperitoneal administration of C. comosa hexane extract at a dose of 250 and 500 mg/kg body weight for 4 weeks. Estradiol (10 μg/kg body weight) was used as the positive control. OVX significantly increased the latency of the animal to the platform, while estradiol and both doses of C. comosa hexane extract reversed the memory impairments. By using the reverse transcription polymerase chain reaction technique, C. comosa hexane extract was shown to produce a selective increase of the ER alpha subtype but not beta subtype in hippocampus, while estradiol increased both of them. C. comosa did not affect spatial memory, learning ability, and ER mRNA levels in the sham OVX rats. In conclusion, C. comosa hexane extract improved the spatial memory of the OVX rats, which was similar to estrogen. The influence on the memory changes might be selectively related to ER alpha in the hippocampus.

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Acknowledgments

This study was supported by Center for Research and Development of Herbal Health Products, Khon Kaen University, and the National Research Council, Thailand.

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Authors and Affiliations

  1. Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, 40002, Thailand

    Jian Su & Bungorn Sripanidkulchai

  2. Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand

    Kittisak Sripanidkulchai

  3. Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 73170, Thailand

    Pawinee Piyachaturawat

  4. Department of Periodontology, Faculty of Dentistry, Khon Kaen University, Khon Kaen, 40002, Thailand

    Nawarat Wara-aswapati

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  1. Jian Su
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  2. Bungorn Sripanidkulchai
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Correspondence to Bungorn Sripanidkulchai.

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Su, J., Sripanidkulchai, B., Sripanidkulchai, K. et al. Effect of Curcuma comosa and estradiol on the spatial memory and hippocampal estrogen receptor in the post-training ovariectomized rats. J Nat Med 65, 57–62 (2011). https://doi.org/10.1007/s11418-010-0457-y

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  • DOI: https://doi.org/10.1007/s11418-010-0457-y

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