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The Effects of Oral Administration of Deer Antler Extracts on an Osteoporosis-induced Animal Model: A Systematic Review and Meta-analysis

골다공증 유발 동물모델에서 녹용 추출물의 경구 투여 효과: 체계적 문헌고찰 및 메타분석

  • Lee, Jung Min (Department of Korean Medicine Rehabilitation, College of Korean Medicine, Daejeon University) ;
  • Kim, Nam Hoon (Department of Korean Medicine Rehabilitation, College of Korean Medicine, Daejeon University) ;
  • Lee, Eun-Jung (Department of Korean Medicine Rehabilitation, College of Korean Medicine, Daejeon University)
  • 이정민 (대전대학교 한의과대학 한방재활의학교실) ;
  • 김남훈 (대전대학교 한의과대학 한방재활의학교실) ;
  • 이은정 (대전대학교 한의과대학 한방재활의학교실)
  • Received : 2022.03.18
  • Accepted : 2022.04.01
  • Published : 2022.04.30

Abstract

Objectives This study aimed to assess the effects of oral administration of deer antler extracts on an osteoporosis-induced animal model. We analyzed the results of using deer antler single extracts on animal models with osteoporosis through a systematic review and meta-analysis. Methods We included osteoporosis studies in animal experiments that administrated deer antler extracts orally. We searched the following 13 databases without a language restriction: PubMed, EMBASE, Cochrane Library, Cumulative Index to Nursing and Allied Health Literature (CINAHL), China National Knowledge Infrastructure (CNKI), Wanfang, Korean Medical Database (KMbase), National Digital Science Library (NDSL), Korean Traditional Knowledge (Koreantk), Oriental Medicine Advanced Searching Integrated System (OASIS), Research Information Sharing Service (RISS), Korea Institute of Science and Technology Information (KISTI), and Koreanstudies Information Service System (KISS). We used Systematic Review Centre for Laboratory Animal Experimentation's risk of bias tool for assessing the methodological quality of the included studies. Results A total of 299 potentially relevant studies were searched and 11 were included for a systematic review. Nine studies used a single deer antler extract. A study compared the effects of single extracts of deer antler and antler glue, while another study compared the effects of three single extracts of deer antler, old antler, and antler glue. For evaluating the intervention effect, bone mineral density (BMD) was measured as the primary outcome, while the histomorphometric indicators of the bone and serum alkaline phosphatase and osteocalcin levels were used as the secondary outcome variables. On conducting a meta-analysis of studies on single deer antler extract, BMD was observed to be significantly increased compared to that in control group (standardized mean difference [SMD]=2.11; 95% confidence interval [CI]=1.58~2.65; Z=7.75; p<0.00001; I2=56%). As a result of meta-analysis, according to the concentration of deer antler, the group with high concentration showed statistically significantly higher BMD than the group with low concentration (SMD=1.28; 95% CI=0.74~1.82; Z=4.63; p<0.00001; I2=9%). Conclusions The research shows that the deer antler extracts have significant anti-osteoporotic effects on the osteoporosis-induced animal model. However the studies included in this research had a high methodological risk of bias. This indicates the requirement of considerable attention in the interpretation of the study results.

Keywords

Acknowledgement

This research was supported by the National Research Foundation of Korea grant funded by the Ministry of Science, ICT & Future Planning (NRF-2021R1A2C2013483).

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