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相关概念视频

Differentiation of Common Myeloid Progenitor Cells01:15

Differentiation of Common Myeloid Progenitor Cells

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...
Classification of Leukocytes01:30

Classification of Leukocytes

Leukocytes are classified into two groups based on the presence or absence of cytoplasmic granules. Granular leukocytes, which contain granules, belong to the myeloid lineage and are divided into three subtypes: neutrophils, eosinophils, and basophils. These cells are roughly spherical and characterized by the granules in their cytoplasm.
Neutrophils are the most abundant type of granular leukocytes, comprising 50-70% of all leukocytes. They feature small, evenly distributed granules and a...
Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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...

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相关实验视频

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From a 2DE-Gel Spot to Protein Function: Lesson Learned From HS1 in Chronic Lymphocytic Leukemia
10:18

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通过基因表达造型鉴定识别的分散型大B细胞淋巴瘤的不同类型.

A A Alizadeh1, M B Eisen, R E Davis

  • 1Department of Biochemistry, Stanford University School of Medicine, California 94305, USA.

Nature
|February 17, 2000
PubMed
概括

扩散性大B细胞淋巴瘤 (DLBCL) 呈现出分子异质性. 基因表达分析确定了两种亚型,生殖中心B细胞类DLBCL和激活的B细胞类DLBCL,具有不同的生存结果.

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科学领域:

  • 在瘤学瘤学.
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 扩散性大B细胞淋巴瘤 (DLBCL) 是最常见的非霍奇金淋巴瘤.
  • 对于DLBCL患者的临床结果是高度可变的,这表明潜在的分子差异.
  • 以前的分类并没有完全捕捉到这种异质性.

研究的目的:

  • 为了研究DLBCL瘤的分子异质性.
  • 根据基因表达特征识别DLBCL的不同分子亚型.
  • 为了将分子亚型与临床结果相关联,特别是患者的生存率.

主要方法:

  • 利用DNA微阵列进行DLBCL瘤的系统基因表达概况.
  • 分析基因表达模式以识别不同的分子特征.
  • 与患者生存数据相关联的确定分子亚型.

主要成果:

  • 确定了DLBCL的两个不同的分子亚型:生殖中心B细胞类DLBCL和激活的B细胞类DLBCL.
  • 生殖中心B细胞类DLBCL瘤表达了生殖中心B细胞特征的基因.
  • 激活的B细胞样DLBCL瘤表达了与体外B细胞激活相关的基因.
  • 与激活的B细胞样DLBCL相比,患有生殖中心B细胞样DLBCL的患者的整体存活率明显更好.

结论:

  • 基因表达概况显示DLBCL中的显著分子异质性.
  • 已经确定了DLBCL的两种临床相关的亚型,生殖中心B细胞类和激活的B细胞类.
  • 基于基因表达的分子分类可以预测患者的生存率并识别不同的癌症亚型.