肠肝轴中的失生症与小鼠胆固醇症期间的低骨质量有关
Brooke Hutchison1,2,3, Jamie Fornsaglio4, Ridgeway Case1,2,3
1Organ Pathobiology and Therapeutics Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
概括
胆固醇症是一种肝脏疾病,导致肠道失调和改变胆酸,通过影响骨细胞导致骨质损失. 准肠肝轴可能会在肝病中保护骨健康.
科学领域:
- 胃肠病学和肝病学
- 内分泌学和新陈代谢学
- 整形外科和骨生物学
背景情况:
- 肠肝轴描述了肠道微生物群与肝脏的相互作用,对健康至关重要.
- 肠道功能失调和胆汁酸 (BA) 稳态中断与胆固醇性肝病有关.
- 胆病患者的骨质损失加速,骨折风险增加,但机制尚不清楚.
研究的目的:
- 为了研究肠肝轴和BA信号传递在胆固醇期骨平衡中的作用.
- 阐明连接胆固醇酶诱导的肠道失调,BA失调和骨质损失的机制.
主要方法:
- 通过使用3,5-diethoxycarbonyl-1,4-dihydrocollidine诱导胆固醇症小鼠模型.
- 用16s rDNA测序分析了肠道微生物组成.
- 评估了肝脏基因表达,骨微型结构 (微型CT),骨质细胞/骨质细胞活性 (体型测量) 和血清/骨髓BA水平 (质谱).
- 在体外研究中使用了用BA刺激的MC3T3-E1 (骨质细胞) 和RAW 264.7 (骨质细胞) 细胞.
主要成果:
- 与对照组相比,胆固醇性小鼠的骨质量减少,骨质细胞增加和骨质细胞减少.
- 胆固醇诱导肠道失调,增加肝脏BA排泄物运输体表达,以及骨髓BA度升高.
- 在体外,胆固醇性小鼠的骨髓BA抑制了骨质母细胞发生,并促进了骨质母细胞发生.
- 法尔内索伊德X受体 (FXR) 激素治疗在试验室中挽救了这些效应.
结论:
- 肠肝轴是胆固醇性肝病中骨平衡的新型调节器.
- 由肠道失调驱动的失调的BA信号,有助于胆固醇期的骨质损失.
- 准肠肝轴和BA信号通路可能为胆固醇患者的骨质疏松症提供治疗策略.
相关概念视频
01:17Chronic Bowel Disorders: Introduction
867
Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
867
01:29Bone Disorders
5.8K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
5.8K