与唐氏综合征相关的血液新生体:疾病的细胞和分子异质性
Edoardo Peroni1, Michele Gottardi2, Lucia D'Antona3
1Immunology and Molecular Oncology Unit, Veneto Institute of Oncology, IOV-IRCCS, 35128 Padova, Italy.
International journal of molecular sciences
|October 28, 2023
概括
唐氏综合征 (DS) 增加了白血病的风险,由于遗传和表观遗传变化. 先进的单细胞技术揭示了DS相关白血病的细胞多样性,有助于向治疗的开发.
科学领域:
- 血液学 血液学 血液学
- 遗传学 是一个遗传学.
- 在瘤学瘤学.
背景情况:
- 唐氏综合征 (DS) 增加了白血病的风险,但潜在的分子机制仍然不完全理解.
- 在DS中白血病发生包括染色体异常,特定基因突变 (例如GATA1,凝聚蛋白基因,RAS,JAK/STAT) 和表观遗传变化.
- 与DS相关的白血病,包括骨髓性白血病 (ML-DS) 和急性淋巴细胞白血病 (ALL-DS),与非DS对应物相比,呈现出不同的遗传特征.
研究的目的:
- 阐明在唐氏综合征中白血病倾向的分子基础.
- 描述DS相关的血液性瘤的细胞和分子异质性.
- 探索先进的单细胞技术的潜力,以确定治疗点和指导DS相关白血病的个性化医疗.
主要方法:
- 对DS相关白血病的分子遗传学现有文献的综述.
- 应用单细胞多组技术,包括单细胞RNA测序和数字空间分析.
- 对克隆进化动态和瘤微环境在DS相关的血液瘤的分析.
主要成果:
- 在ML-DS中过渡性异常骨髓形成是由GATA1突变驱动的,通过凝聚蛋白基因,CTCF,RAS或JAK/STAT通路基因的突变进展到ML-DS.
- ALL-DS经常涉及异常的CRLF2表达,JAK2突变和RAS通路激活,从遗传上不同于非DS ALL.
- 单细胞技术为细胞异质性,克隆进化和DS相关白血病中的瘤微环境提供了深入的见解.
结论:
- 了解DS相关白血病的分子格局对于改善患者的治疗结果至关重要.
- 先进的单细胞多组学方法为剖析疾病复杂性和确定新的治疗策略提供了强大的工具.
- 这些发现为个性化医疗和针对唐氏综合征相关血液瘤的向治疗铺平了道路.
相关概念视频
01:15Differentiation of Common Myeloid Progenitor Cells
3.2K
Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
3.2K
01:19Multipotency of Hematopoietic Stem Cells
3.1K
The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
3.1K
01:17Karyotyping
61.5K
Overview
61.5K
01:29Nondisjunction
75.7K
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
75.7K
01:21Hematopoiesis
5.3K
The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
5.3K
01:49Meiosis I
193.7K
Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...
193.7K