通过通过免疫组织化学的RET过度表达来识别TMEM127缺陷的叶绿色细胞瘤/护理细胞瘤
Research square
|February 6, 2026
概括
高RET膜表达表明TMEM127基因功能障碍在色细胞瘤和偏角细胞瘤 (PPGLs). 这种RET免疫组织化学 (IHC) 发现有助于识别病原变异和解释PPGL中不确定的变异.
科学领域:
- 内分泌学和瘤学的内分泌学和瘤学.
- 分子病理学分子病理学
- 内分泌瘤的遗传学
背景情况:
- 乳色细胞瘤和偏角细胞瘤 (PPGLs) 是罕见的瘤,具有不同的遗传基础.
- 识别病原性生殖系变异,包括TMEM127基因,对于患者的管理和监测至关重要.
- 对TMEM127变种的功能评估可能具有挑战性,需要改进的诊断工具.
研究的目的:
- 通过免疫组织化学 (IHC) 来评估RET蛋白表达,作为PPGL中TMEM127功能障碍的生物标志物.
- 确定RET IHC在识别致病性TMEM127变体和评估具有不确定意义的变体 (VUS) 中的诊断实用性.
主要方法:
- 在104个固定在甲,嵌入式抛 (FFPE) PPGL样本中,使用IHC评估了RET蛋白表达.
- 组织化学评分 (HS) 用于量化膜 (MH-S) 和细胞质 (CH-S) RET染色.
- 在具有不同遗传背景的PPGL中比较了RET表达水平,包括TMEM127和RET变异.
主要成果:
- 与其他基因型相比,具有致病性TMEM127变异的PPGL表现出明显更高的RET表达得分 (151.8 ± 62),主要是膜染色 (MH-S).
- 在检测TMEM127功能障碍方面,RET IHC表现出高特异性 (100%) 和高灵敏性 (91%).
- 膜RET免疫活性有效地区分了带有非破坏性TMEM127变异的PPGL与带有VUS的PPGL.
结论:
- 提升的RET膜表达是PPGLs中致病性TMEM127变体的有价值生物标志物.
- RET IHC可以帮助解释TMEM127变体的功能影响,包括那些被归类为VUS.
- 这种方法为诊断和管理基因多样化的PPGL提供了潜在的辅助工具.
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