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골다공증 동물 모델에서 골밀도 변화에 관한 카텝신 K 억제제와 부갑상선호르몬 병용요법의 효과

(대한내분비학회지 26:303-309, 2011, 이승훈 외 5인)

이승훈·고정민·이영선1·김범준·최제용2·김기수

울산대학교 의과대학 서울아산병원 내분비대사내과, 아산생명과학연구소1, 경북대학교 의과대학 생화학세포생물학교실2

Received: , Accepted:

Corresponding author:

The Effects of Combination Therapy of Cathepsin K Inhibitor and PTH on Change in Bone Mineral Density in an Animal Model of Osteoporosis

Seung Hun Lee, Jung-Min Koh, Young-Sun Lee1, Beom-Jun Kim, Je-Yong Choi2, Ghi-Su Kim

Division of Endocrinology and Metabolism, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul; Asan Institute for Life Sciences1, Seoul; Department of Biochemistry and Cell Biology2, Kyungpook National University School of Medicine, Daegu, Korea

Endocrinol Metab 27(1):107, March 2012

http://dx.doi.org/10.3803/EnM.2012.27.1.107

RESPONSE

하루두번, 테리파라타이드 10 μg/kg 하루한번을가장적절한용 량으로증명한후본실험을진행할수있었습니다. 이과정에서골 교체생화학적지표보다골밀도지표를이용하게된이유는, 생화 학적지표에비해골밀도지표의오차범위가적기때문에좀더신 뢰할수있을것으로판단하였기때문입니다. 그러나, 좀더명확한 결론을내리기위하여투고자께서지적하신것처럼, 골강도, 생화학 적지표, 형태학적분석등의다양한지표를보여주지못한것은큰 아쉬움으로생각합니다.

다시한번본연구에관심을보여주신투고자께감사드립니다. 참고문헌

1. Rhee Y. The effects of combination therapy of cathepsin K inhibitor and PTH on change of bone mineral density in animal model of osteoporosis.

Endocrinol Metab 26: 295-296, 2011

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Copyright © 2012 Korean Endocrine Society

저자들의논문에대한관심과좋은의견감사드립니다. 투고자께 서는골밀도결과이외에골강도, 골교체생화학적지표, 파골세포의 수를직접평가하는실험을하였는지질의를하셨는데, 가장일차적 인이유는상기의검사들을수행하기위한저희팀의기술적문제 때문이라고답변드릴수있겠습니다. 그럼에도 불구하고저희들의 골밀도결과만으로논문을투고하게된이유는아래와같습니다.

저자들은골흡수억제제와부갑상선호르몬의병합요법을연구 할때에가장중요한것이각약제의병합비율이라고판단하였습니

다. Rhee [1]가이미지적을하였듯이부갑상선호르몬과비스포스포

네이트의효과가미미하다는임상연구들과달리, 병합요법의효과 가존재한다는동물실험의연구방법들을분석해보면부갑상선호 르몬의용량이상대적으로더많은것을알수있습니다. 또한, 상대 적으로약한골흡수억제제인랄록시펜의경우부갑상선호르몬의 골형성능을약화시키지않았습니다. 이는골흡수억제제와골형 성촉진제사이의병합요법의효과는, 골흡수억제제의작용기전 뿐만아니라두약제의병합비율에따라영향을받을수있음을뜻 합니다.

따라서, 비스포스포네이트제제와카텝신 K 억제제가부갑상선호 르몬의골형성능에영향을주는지비교하기위하여는, 첫째, 비스 포스포네이트제제와카텝신 K 억제제가비슷한효과를보이는두 약제의용량을찾아야하고, 둘째, 부갑상선호르몬의약제효과를 억제하는비스포스포네이트와부갑상선호르몬용량의적정비율을 찾는것이중요합니다. 이를위하여실험을두번으로나누어실시 하였고, 그결과졸레드론산 10 μg/kg, 카텝신 K 억제제 100 mg/kg

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