显著的衰老机制抑制了失塑性膜的进展
bioRxiv : the preprint server for biology
|July 28, 2023
概括
TERT促进器突变 (TPM) 与老化和骨中较短的端粒有关,绕过复制性衰老. BRAF V600E突变引发了瘤基因诱导的衰老,这表明黑色素瘤的发展有不同的途径.
科学领域:
- 在瘤学瘤学.
- 遗传学 遗传学 是一个
- 皮肤病学 皮肤病学
背景情况:
- TERT促进子突变 (TPM) 在黑色素瘤中很常见,在瘤转变为黑色素瘤的早期出现.
- 驱动特定 nevi 中 TPM 选择的因素尚不清楚.
- 了解这些因素对于了解黑色素瘤进展至关重要.
研究的目的:
- 调查TPM在异形性瘤 (DN) 中的作用.
- 分析TPM,患者年龄,端粒长度,组织学和p16表达之间的关系.
- 确定TPM和BRAF V600E突变如何影响黑色细胞瘤中的衰老路径.
主要方法:
- 在黑色细胞瘤中测序常见突变基因.
- 对异形瘤 (DN) 样本的分析.
- 突变状态与患者年龄,端粒长度,组织学特征和p16表达的相关性.
- 与黑色素瘤测序数据的比较.
主要成果:
- 从老年患者的DN中,TPM更频繁,并且与短端粒有关.
- 在BRAF V600E突变的 nevi中没有TPM.
- BRAF V600E突变DNA发生在更年轻的患者中,具有更长的端粒和更多的p16阳性细胞,这表明瘤基因诱导衰老 (OIS).
- 具有BRAF V600E突变的黑色素瘤通常具有CDKN2A无活化,绕过OIS.
- 没有BRAF V600E突变的黑色素瘤显示出更多的TPM,表明绕过复制性衰老 (RS).
结论:
- TPM似乎有助于绕过复制性衰老 (RS) 在未被OIS阻止的黑色细胞瘤中.
- 黑色细胞瘤面临RS或OIS和RS的组合.
- 在黑色素瘤进展中克服衰老障碍的序列取决于突变.
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