从无细胞血染色质中综合推断癌症基因表达
bioRxiv : the preprint server for biology
|February 27, 2026
概括
研究人员开发了APEX,这是一种新的方法,可以从无血细胞染色体中推断出癌症基因表达. 这种非侵入性方法准确地描述瘤状态,并有助于预测治疗反应.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 基因表达对于瘤特征和治疗结果至关重要,但难以非侵入性地测量.
- 目前的液体活检方法主要关注基因组的改变,而不是基因表达.
研究的目的:
- 引入APEX (将血表观遗传特征与表达联系起来),这是从循环的无细胞染色体中推断基因表达的框架.
- 建立一个没有活检的方法来分析瘤转录状态.
主要方法:
- APEX集成了来自血cfChIP-seq.的定位组素标记和DNA碎片化模式.
- 该框架是通过广泛匹配的瘤RNA-seq和多种癌症类型的血cfChIP-seq数据进行训练的.
- 对超过15种未见的癌症亚型进行了验证.
主要成果:
- APEX准确地从血中推断出癌症基因表达,超过现有的基于血的方法.
- 该框架在各种瘤部分中表现出有效性.
- APEX使胰腺癌亚型的分类成为可能,并确定了膀癌治疗反应的生物标志物.
结论:
- APEX提供了一个没有活检的方法,仅使用等离子体来分析瘤转录状态.
- 这将液体活检能力扩展到基因组改变以外的临床相关的基因表达程序.
- APEX具有非侵入性癌症诊断和治疗监测的潜力.
相关概念视频
Non-LTR Retrotransposons
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
Cancers Originate from Somatic Mutations in a Single Cell
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Metastasis
Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Combination Therapies and Personalized Medicine
Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Cancers Originate from Somatic Mutations in a Single Cell
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...


