在TgRANKL骨质疏松症小鼠中,在停止使用登苏马布和连续使用佐勒德罗纳特治疗后,模拟反弹骨损失
Vagelis Rinotas1, Eleftheria-Dimitra Ntouskou1, Melina Dragolia2
1Institute for Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.
Frontiers in endocrinology
|March 16, 2026
概括
停止治疗骨质疏松症的德诺苏马布会导致快速的骨质损失. 序列性勒酸治疗有效地防止了这种反弹效应在一个新的转基因小鼠模型,虽然它的好处是暂时的.
科学领域:
- 骨生物学和骨质疏松症研究研究
- 药理学和治疗学 药理学和治疗学
- 翻译医学是一种翻译医学.
背景情况:
- 通过denosumab抑制核因子-κB连接体 (RANKL) 的受体激活剂是骨质疏松症的关键治疗方法.
- 停止使用登苏马布会导致严重的反弹骨损失和骨折风险.
- 现有的临床前模型由于物种特定的RANKL相互作用而受到限制.
研究的目的:
- 在人类RANKL转基因小鼠模型中调查denosumab停药反弹.
- 评估序列性佐莱德龙酸治疗对缓解反弹骨损失的疗效.
- 在反弹和恢复阶段表征骨变化和骨头周转标记.
主要方法:
- 使用表达人类RANKL (TgRANKL) 的转基因小鼠用于骨质疏松症建模.
- 与四个组进行了比较:载体控制,连续代诺苏玛布,代诺苏玛布停药,和顺序代诺苏玛布-勒酸盐.
- 通过微CT,体型测量,骨循环标记 (BTMs) 和基因表达来评估骨变化.
主要成果:
- 在TgRANKL小鼠中,德诺苏马布治疗逆转了骨质疏松症;退出诱导了反弹骨损失和升高的BTMs.
- 德诺苏马布抑制了骨髓脂肪组织;取消导致部分改革.
- 连续给予佐勒德罗纳特预防了反弹骨损失,但在停止治疗后,效果并没有持续.
结论:
- TgRANKL小鼠提供了一个独特的模型,用于研究德诺苏马布反弹机制.
- 连续的佐莱德罗纳特治疗有效地控制了德诺苏马布诱导的反弹骨损失.
- 索莱德酸的保护作用需要持续服用才能长期有效.
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