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Evidence-Based Complementary and Alternative Medicine
Volume 2018 (2018), Article ID 2929107, 9 pages
https://doi.org/10.1155/2018/2929107
Research Article

A Hop Extract Lifenol® Improves Postmenopausal Overweight, Osteoporosis, and Hot Flash in Ovariectomized Rats

1College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University, Cheongju, Republic of Korea
2Anydoctor Healthcare Co., Ltd., Cheonan, Republic of Korea
3College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea

Correspondence should be addressed to Yun-Bae Kim; rk.ca.ubc@39ralos

Received 25 June 2017; Accepted 17 December 2017; Published 12 February 2018

Academic Editor: Nunziatina De Tommasi

Copyright © 2018 Young-Hwan Ban et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective. In order to assess the effectiveness of a hop extract (HE) for postmenopausal symptoms, the effects of Lifenol on ovariectomy-induced osteoporosis, hyperlipidemia, body weight increase, and hot flash were investigated in rats. Methods. Female Sprague-Dawley rats were ovariectomized and subjected to a daily scheduled exercise training (15 min at 15 m/min) or treated with HE (30 or 100 mg/kg, oral) or 17β-estradiol (100 μg/kg, intraperitoneal) for 12 weeks. Body and visceral fat weights, serum lipid profiles, osteoporotic parameters in serum, and femoral bones were analyzed. Separately, forced running-induced dermal and rectal temperatures and blood flow velocity were measured in ovariectomized rats. Results. Ovariectomy increased blood lipids including triglycerides, total cholesterol, and low-density lipoproteins, leading to visceral fat accumulation and overweight. Estrogen depletion caused osteoporosis, displaying decreased femoral bone weight, bone mineral density and content, and blood phosphorus level. The disturbances in lipid metabolism and bone resorption were recovered by treatment with HE in a dose-dependent manner. In addition, HE treatment shortened the duration of forced running-induced alterations in skin and rectal temperatures by reducing blood flow velocity. Conclusion. The results indicate that HE attenuated overweight, osteoporosis, and hot flash in estrogen-deficient animals by regulating blood lipid profile and fat accumulation, blood estrogen and bone resorption factors, and dermal blood flow.