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糖皮质激素(glucocorticoid, GC)是一种在临床上广泛应用于治疗类风湿性关节炎、胃肠道疾病及自身免疫疾病的药物[1]。然而,研究显示,有超过50%的患者在长期接受GC的治疗过程中会发生骨质疏松症[2]。目前,糖皮质激素诱导的骨质疏松(glucocorticoid-induced osteoporosis, GIOP)已成为病理性骨丢失的第三大常见病症,仅次于老年性骨质疏松症和绝经后骨质疏松症。与此同时,GIOP由于其高致残率和高发病率给社会和家庭生活造成了极大的负担,因此,如何预防和治疗GIOP成为医学上关注的热点。
啤酒花(Humulus lupulus L.)为桑科葎草属多年生草质蔓生藤本植物,其雌性带花果穗不仅是酿造啤酒的添加原料,也是全球广泛应用的药物品种,并在欧洲广泛用于缓解更年期潮热及绝经后骨质疏松症[3]。黄腐酚(xanthohumol, XN)为啤酒花中的代表性成分,具有抗氧化、抗肿瘤、抗菌等活性[4]。课题组前期研究发现,啤酒花提取物及黄腐酚可显著改善去卵巢小鼠的骨丢失,防治绝经后骨质疏松症。此外,两者还可显著调节成骨细胞与破骨细胞的活性,维持骨稳态[5-6]。然而,目前对于啤酒花及黄腐酚抗GIOP的作用机制尚不明确。故笔者拟以地塞米松(DEX)诱导的骨质疏松小鼠及其损伤的成骨细胞为模型,采用Micro-CT及体外活性检测等方法,对啤酒花及黄腐酚抗GIOP的作用进行探究。
Effects of Humulus lupulus L. and its active ingredient xanthohumol on preventing glucocorticoid-induced osteoporosis
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摘要:
目的 研究对啤酒花及其活性成分黄腐酚抗糖皮质激素性骨质疏松(GIOP)作用。 方法 腹腔注射地塞米松(DEX)造模,并结合Micro-CT及Elisa试剂盒检测等方法,对小鼠股骨的骨微结构、骨密度及血清骨生化指标进行评价。同时,采用DEX损伤成骨细胞,对其增殖、分化水平及骨形成相关蛋白的表达进行评价。 结果 啤酒花提取物及黄腐酚可显著改善GIOP小鼠的骨微结构破坏,增强骨密度,改善骨小梁参数。在成骨细胞水平上,啤酒花及黄腐酚既可促进DEX损伤成骨细胞的增殖、分化,又可提高骨钙素(BGP)、骨形成蛋白2(BMP-2)以及成骨特异性转录因子(Runx-2)的表达水平,促进骨形成。 结论 该研究首次明确了啤酒花及黄腐酚具有抗GIOP作用,为抗骨质疏松药物的开发提供了新资源。 -
关键词:
- 啤酒花 /
- 黄腐酚 /
- 糖皮质激素性骨质疏松 /
- 地塞米松 /
- 成骨细胞
Abstract:Objective To explore the effects of Humulus lupulus L. extract (HLE) and xanthohumol (XN) on preventing glucocorticoid-induced osteoporosis (GIOP). Methods The GIOP model was established by intraperitoneal injection of dexamethasone (DEX). Bone microstructure, bone mineral density and serum biochemical indexes were evaluated by Micro-CT and ELISA kits. The levels of cells proliferation and ALP activity, and the expression of bone formation related proteins were assayed with primary osteoblasts injured by DEX. Results HLE and XN significantly alleviated the bone microstructure damage, enhanced the bone mineral density, and improved the trabecular parameters in GIOP mice. In vitro experiments showed that HLE and XN can prevent bone loss not only by improving cell proliferation and ALP activity, but also through increasing the expression of bone γ-glutamic acid-containing proteins (BGP), bone morphogenetic protein 2 (BMP-2) and runt-related transcription factor 2 (Runx-2). Conclusion This study confirmed that HLE and XN had anti-GIOP effects for the first time. It provides a new resource for the development of anti-osteoporosis medications. -
Key words:
- Humulus lupulus L. /
- xanthohumol /
- glucocorticoid-induced osteoporosis /
- dexamethasone /
- osteoblast
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