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作为SERPINF1突变诱导的VI型骨质变异不完美的潜在治疗点,内质网膜应激和自
Yang Tian1, Xinyu Chen1, Shuoshuo Wei2
1Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong 250021, China; "Chuangxin China" Innovation Base of stem cell and Gene Therapy for endocrine Metabolic diseases, China; Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong 250021, China; Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong 250021, China.
新型SERPINF1突变通过破坏色素表皮衍生因子 (PEDF) 分泌,导致骨质细胞中ER压力和亡,导致VI型骨质生殖不完美. 细胞激活ERAD和自,以应对积累的突变蛋白质.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 骨质变生不完美 (OI) 是一组导致骨脆弱的遗传性疾病.
- 六型OI是一种罕见的,与SERPINF1基因突变相关的自体相衰退形式.
- 与SERPINF1相关的VI型OI病原体的确切机制尚未完全理解.
研究的目的:
- 在VI型OI患者中识别和描述新型SERPINF1突变.
- 阐明这些突变对色素表皮衍生因子 (PEDF) 和骨质细胞功能的功能后果.
- 研究细胞对突变PEDF积累的反应,包括内质网膜 (ER) 应激和降解途径.
主要方法:
- 两家患有VI型OI的家族的遗传分析.
- 在MC3T3-E1骨质细胞中进行功能研究,这些细胞被突变SERPINF1/PEDF.转移.
- 分析蛋白质分泌,亚细胞局部化,亡,ER压力,ER相关降解 (ERAD) 和自.
主要成果:
- 在VI型OI患者中发现了三种新的SERPINF1突变.
- 突变的PEDF蛋白质被保留在ER中,无法适当分泌.
- 突变PEDF损害了骨质细胞分化,促进了亡,并诱导了ER压力,这种压力通过ERAD和自部分得到解决.
结论:
- 新的SERPINF1突变破坏了PEDF分泌,导致VI型OI的ER积累和骨质细胞功能障碍.
- 细胞应激反应,包括ERAD和自,被激活以管理突变蛋白质的积累.
- 这些发现揭示了VI型OI的新致病途径,涉及ER应激和蛋白质降解机制.
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