血素通过TNF-α介导的线粒体亡抑制肝细胞癌
Liying Ren1, Yuxin Man2, Xue Zhang1
1Peking University Hepatology Institute, Peking University People's Hospital, Infectious Disease and Hepatology Center of Peking University People's Hospital, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing 100044, China.
Cancers
|September 27, 2025
概括
这项研究基于纤维解和六个基因的签名确定了新的肝癌分子亚型 (HCC). 血素 (HPX) 通过促进HCC的亡,显示出抗瘤作用.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 纤维溶解对凝血稳定至关重要,但其在肝细胞癌 (HCC) 中的作用尚不清楚.
- 了解HCC中的纤维素分解对于开发新的诊断和治疗策略至关重要.
研究的目的:
- 根据纤维化解来对肝细胞癌 (HCC) 进行分类.
- 开发一个HCC的预后签名.
- 为了确定一个关键的基因调节纤维素分解在HCC.
主要方法:
- 非负矩阵因子化 (NMF) 用于分子亚型化.
- 权重基因共同表达网络分析 (WGCNA) 和LASSO-Cox回归用于预后特征的发展.
- 使用体外和体外模型,RNA测序,流细胞计和西斑分析对血素 (HPX) 的功能验证.
主要成果:
- 鉴定出与纤维解析相关的独特的HCC亚型,具有不同的临床结果和瘤微环境.
- 开发了一个六基因预后特征 (ACAT1,GRHPR,HPX,PCK2,IYD,PON1),该特征使HCC患者分为风险组.
- 验证了Hemopexin (HPX) 作为一个关键基因,证明其抑制瘤生长,促进亡,并通过TNF-α信号调节Bax/Bcl-2比率的能力.
结论:
- 基于纤维解析的新型HCC分子亚型被定义.
- 通过诱导TNF-α介导的线粒体亡,HPX在HCC中表现出抗瘤特性.
- 这些发现提供了关于纤维素分解在HCC中的作用的见解,并确定HPX作为潜在的治疗点.
相关概念视频
01:17The Extrinsic Apoptotic Pathway
8.1K
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
8.1K
01:31The Intrinsic Apoptotic Pathway
8.3K
Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
8.3K
01:24Regulation of Angiogenesis and Blood Supply
3.3K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
3.3K
01:24Peroxisomes
20.0K
Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
20.0K
01:30Apoptosis
14.1K
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size...
14.1K
01:16Necrosis
6.3K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
6.3K