模拟APOL1介导的炎和纤维化,使用部分重编程的尿源性SIX2阳性原细胞系
Chantelle Thimm1, Rosanne Mack1, Osmond Adjei-Aruna1
1Institute for Stem Cell Research and Regenerative Medicine, Medical Faculty, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany.
Stem cell research & therapy
|November 13, 2025
概括
研究人员为脏疾病建模复原了人类原体细胞 (UM30-OSN). 这些再生细胞有效地模拟了APOL1介导的病,并显示出对抗炎症反应的药物查的潜力.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 干细胞生物学 干细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 慢性病 (CKD) 影响全球数以百万计的人,细胞损伤是关键因素.
- 细胞是终端分化且难以培养的,阻碍了病研究.
- 细胞衰老与端粒缩短有关,限制了培养细胞的寿命.
研究的目的:
- 为了改善病的体外建模,复原人类前代细胞.
- 建立一个可再生的细胞来源,用于研究 podocyte 生物学和 CKD.
- 为了研究再生细胞在模拟APOL1介导病中的实用性.
主要方法:
- 使用Yamanaka因子 (OCT4,SOX2,NANOG,c-Myc,KLF4) 对人类SIX2阳性前代细胞 (UM30-OSN) 的部分重编程.
- 通过分析多能性和扩散标记物 (SSEA4,PCNA,KI67,TERT) 和衰老标记物 (p21,p53) 来评估复苏.
- 分化为细胞和评估细胞特异性标记物 (NPHS1,NPHS2,SYNPO,CD2AP),然后进行转录组分析.
主要成果:
- 复原的UM30-OSN细胞表现出多能性标志物和下调老化,与上调的增殖标志物.
- 不同化的UM30-OSN细胞表达了受体细胞特异性标记物,并与已建立的受体细胞细胞系有很高的相关性.
- 源自UM30-OSN的细胞模拟了APOL1介导的病,而巴里西提尼布对抗IFN-γ诱导的炎症和纤维性反应.
结论:
- 复原的UM30-OSN细胞为研究脏疾病提供了一个强大的模型,包括APOL1相关的脏病.
- 这些细胞有助于研究损伤和纤维化机制.
- 该模型对于评估治疗干预措施,如JAK抑制剂,在病背景下是有价值的.
相关概念视频
02:53Conservative Site-specific Recombination and Phase Variation
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
01:29Somatic to iPS Cell Reprogramming
Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012 for this...
01:32Chromatin Modification in iPS Cells
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...