向茎状途径调节了巨细胞的两极分化,并重新编程了瘤的微环境
Austeja Butkute1,2, Marius Baltramonaitis1,2, Simona Malmige3
1Laboratory of Immunology, National Cancer Institute, Vilnius, Lithuania.
Frontiers in immunology
|March 31, 2025
概括
在结肠直肠癌和乳腺癌模型中,用抑制剂向癌症干细胞重编程巨细胞,使其处于M1类抗瘤状态,从而提供新的免疫疗法策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
背景情况:
- 瘤微环境 (TME) 对癌症的进展和治疗耐药性至关重要.
- 瘤相关巨细胞 (TAMs) 通常促进免疫抑制和瘤生长.
- 介质细胞类癌症,如共识分子亚型4 (CMS4) 大肠直肠癌 (CRC) 和三阴性乳腺癌,表现出免疫排斥和高巨细胞透.
研究的目的:
- 调查向癌细胞干细胞是否可以调节巨细胞两极分化.
- 将免疫平衡从支持瘤的M2类巨细胞转移到抗瘤的M1类巨细胞.
- 评估干性抑制剂对CRCin vitro和乳腺癌in vivo的影响.
主要方法:
- 使用了四种干性抑制剂 (沙利诺米辛,SB-431542,JIB-04,纳巴库) 针对Wnt/β-catenin,TGF-β,基因组脱甲基化和STAT3通路.
- 在间接的共同培养模型中,对CMS4 CRC细胞系 (HCT116,SW620) 和人类外周血液衍生的巨细胞进行了评估.
- 在体内研究中使用了同源免疫能力高的乳腺癌小鼠模型EO771.
主要成果:
- CMS4 CRC细胞系诱导了明显的巨分化:HCT116促进了类似M2的巨,SW620促进了类似M1的巨.
- 组合干细胞抑制剂减少了CRC细胞中的干细胞标记物 (CD133,CD44).
- 干性抑制剂将巨分化转移到类似M1的表型,特别是HCT116,并增加了M1/M2巨比率.
结论:
- 干细胞抑制剂在向癌细胞和调节免疫微环境方面具有双重作用.
- 这些发现表明有希望的策略来增强中细胞类瘤的抗瘤免疫力.
- 向癌症干细胞提供了一种新的免疫调节方法,用于挑战性癌症亚型.
相关概念视频
The Tumor Microenvironment
6.5K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.5K
Mesenchymal Stem Cells
4.6K
Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
4.6K
Cancer Stem Cells and Tumor Maintenance
4.7K
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
4.7K
Regulation of Hematopoietic Stem Cells
3.1K
All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
3.1K
Interactions Between Signaling Pathways
6.2K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.2K


