转录因子BBX通过调节FGF23的调节来调节酸盐稳态
Su Jeong Lee1, Ju Ang Kim1, Hye Jung Ihn2
1Department of Oral Pathology and Regenerative Medicine, School of Dentistry, Institute for Hard Tissue and Bio‑tooth Regeneration (IHBR), Kyungpook National University, Daegu, Republic of Korea.
比索克斯同源物 (Bbx) 负面调节纤维细胞生长因子23 (FGF23) 的表达. 它的降解对FGF23介导的酸盐稳定和小鼠骨发育至关重要.
科学领域:
- 分子内分泌学分子内分泌学
- 骨生物学 骨生物学
- 矿物质的新陈代谢.
背景情况:
- 纤维细胞生长因子23 (FGF23) 对酸盐平衡至关重要,但其表达的调节尚未完全理解.
- 异常的FGF23水平导致低血和骨异常.
研究的目的:
- 阐明波比·索克斯同类物 (Bbx) 影响FGF23表达和代谢的分子机制.
- 调查Bbx在骨发育和骨矿物质密度中的作用.
主要方法:
- 产生和分析Bbx淘汰赛小鼠 (Bbx-/-) 和骨细胞特异性Bbx删除模型.
- 测量血清酸盐,FGF23水平和骨参数 (BMD,BV) 的评估.
- 试验室研究涉及Fgf23促进体分析,基因淘汰/过度表达和蛋白质稳定性测试 (例如,循环赫西米德治疗,无处不在分析).
主要成果:
- Bbx缺乏导致FGF23表达增加,低血症和骨异常,包括低BMD和BV.
- 1,25-二氧维生素D3 (1,25(OH) 2D3) 治疗通过与Bbx相互作用抑制了Fgf23促进体活性,导致Bbx蛋白降解.
- Bbx的依赖于乌比奎丁的蛋白质体降解被确定为通过1,25(OH) 2D3.3诱导FGF23的关键步骤.
结论:
- Bbx作为FGF23表达的负调节剂.
- 在FGF23驱动的酸盐恒温和骨发育调节过程中,由ubiquitin-proteasome系统介导的Bbx降解至关重要.
- 这项研究揭示了一种涉及Bbx在矿物质和骨代谢中的新型调节途径.
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