SOX10-内部并列重复和PLAG1或HMGA2融合分离了类型和类型的皮肤混合瘤
Nicolas Macagno1, Thibault Kervarrec2, Soumanth Thanguturi3
1CARADERM, French Network of Rare Skin Cancers, Lille, France; Department of Pathology, APHM, Timone, Marseille, France; Aix Marseille University, INSERM, MMG, Marseille, France.
概括
这项研究确定了SOX10内部串联重复在异分泌类型皮肤混合瘤 (ECMT) 和HMGA2融合在异分泌类型皮肤混合瘤 (ACMT) 中. 这些发现有助于根据它们的分子驱动因素区分这些皮肤瘤.
科学领域:
- 皮肤病理学 皮肤病理学
- 分子瘤学分子瘤学
- 基因组医学是基因组医学.
背景情况:
- 皮肤混合瘤是多种多样的,分为阿波克林 (ACMT) 或埃克林 (ECMT) 类型.
- 阴类型的皮肤混合瘤 (ACMT),特别是素细胞丰富的变体 (HCR-ACMT),可能具有血细胞的肌皮质组成部分.
- 虽然在ACMT中已知PLAG1融合,但ECMT的驱动因素仍未确定.
研究的目的:
- 从形态学,免疫组织化学和分子上全面描述ACMT和ECMT.
- 确定ECMT中的特定瘤原因驱动因素,并进一步阐明ACMT中的那些因素.
- 分析不同皮肤混合瘤亚型和相关瘤之间的转录组关系.
主要方法:
- 对41例皮肤混合瘤病例 (28例ACMT/HCR-ACMT,13例ECMT) 的形态学和免疫组织化学分析.
- 用于分子特征的RNA测序,包括基因融合和重组的识别.
- 基因表达概况和对110种不同类型组织型的瘤的聚类分析.
主要成果:
- SOX10表达是普遍的;PLAG1和HMGA2表达是特定于ACMT/HCR-ACMT的.
- 在所有ACMT/HCR-ACMT病例中确认了复发性PLAG1或HMGA2融合,与免疫组织化学相关.
- 在所有ECMT病例中发现了SOX10内部串联重复 (SOX10-ITD);在ECMT中观察到明显的转录基因组集群.
结论:
- 这项研究首次报告了ECMT中的SOX10-ITD和ACMT中的HMGA2融合.
- 这些发现精确了对ACMT中PLAG1融合流行率的理解.
- 转录组分析突出了ECMT和其他皮肤混合瘤之间的显著分子区别,包括异质肌皮质瘤组.
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