正常的B细胞在慢性淋巴细胞白血病中表达ZAP70:自身免疫和淋巴增殖之间的联系?
Dana Ghergus1,2, Mickaël Martin1,3,4, Anne-Marie Knapp1
1Strasbourg University, Strasbourg, France.
American journal of hematology
|October 19, 2023
概括
在慢性淋巴细胞白血病 (CLL) 中,表达ZAP-70 (zeta链关联蛋白激酶70) 的非恶性B细胞与自身免疫并发症有关. 这表明ZAP-70可能在CLL发展之前发挥作用.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 分子生物学分子生物学
背景情况:
- ZAP-70 (zeta链相关蛋白激酶70) 是慢性淋巴细胞白血病 (CLL) 的预后标志物.
- 自身免疫现象,通常与来自非恶性B细胞的免疫球蛋白G有关,在CLL中很常见,但不太了解.
- 在非恶性B细胞中ZAP-70的作用及其与CLL自身免疫的关联需要进一步研究.
研究的目的:
- 研究CLL患者的非恶性B细胞中ZAP-70的表达.
- 确定ZAP-70+非恶性B细胞与CLL中的自身免疫细胞衰减之间的关联.
- 探索ZAP-70在早期B细胞发育和CLL病变发生中的潜在作用.
主要方法:
- 流细胞计量量化ZAP-70表达在CLL患者和健康对照的CD5-B细胞上的表达.
- 在正常B细胞中检测ZAP-70和免疫球蛋白基因转录的单细胞mRNA检测.
- 分析ZAP-70+ B细胞与自身免疫性细胞衰减之间的关联.
- 由ZAP-70+非恶性B细胞产生的抗体自身反应的特征.
主要成果:
- 来自CLL患者的CD5非恶性B细胞的显著百分比表达ZAP-70,与健康人群不同.
- 在各种B细胞子集中检测到ZAP-70的表达,包括天真B细胞,这表明B细胞的早期发育参与.
- 在CLL患者中,ZAP-70+正常B细胞的存在与自身免疫细胞衰减相关.
- 这些ZAP-70+ B细胞的抗体表现出自身反应,包括抗血小板活性.
结论:
- ZAP-70在CLL患者的非恶性B细胞中表达,这可能表明它在白血病发生过程中的早期作用.
- ZAP-70+非恶性B细胞与CLL的自身免疫并发症有关.
- 这些发现增强了对ZAP-70在CLL病原和自身免疫机制中的影响的理解.
相关概念视频
B Cell Activation and Differentiation
1.7K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
1.7K
Cells of the Adaptive Immune Response
1.0K
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
1.0K
The Intrinsic Apoptotic Pathway
6.6K
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...
6.6K
Disorders of Leukocytes
965
Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune...
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune...
965
T Cell Types and Functions
1.0K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
1.0K
Lymphoid Cells and Tissues
1.2K
Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
1.2K


