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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
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T Cell Activation and Clonal Selection01:22

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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
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Cytotoxic T Cells-mediated Immune Response01:27

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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
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T Cell Types and Functions01:24

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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.
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Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
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microRNAs function in CD8+T cell biology.

Yan Liang1, Hai-Feng Pan1, Dong-Qing Ye2

  • 1Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, PR China.

Journal of Leukocyte Biology
|January 7, 2015
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRNAs) are key regulators of CD8(+)T cell function, impacting immune surveillance, infection, and cancer. Understanding miRNA roles is crucial for advancing immune cell biology and potential clinical applications.

Keywords:
activationdevelopmentdifferentiation

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • CD8(+)T cells are vital for immune surveillance but their dysregulation contributes to infections and cancer.
  • MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression post-transcriptionally.
  • miRNAs are increasingly recognized for their role in immune cell development and function.

Purpose of the Study:

  • To review the current understanding of miRNA functions in CD8(+)T cell biology.
  • To explore the impact of miRNAs on gene expression in CD8(+)T cells during development, infection, and oncogenesis.
  • To discuss future challenges and clinical relevance of miRNA biology in CD8(+)T cells.

Main Methods:

  • Literature review of studies on miRNA function in CD8(+)T cells.
  • Analysis of miRNA-mediated gene regulation in immune responses.
  • Synthesis of information on miRNA roles in immune cell development and disease.

Main Results:

  • miRNAs are crucial for impeding inappropriate gene expression and refining differentiation programs in CD8(+)T cells.
  • miRNAs directly modulate regulatory protein concentrations essential for T cell development and peripheral responses.
  • Dysregulated miRNA expression is linked to T cell dysfunction in infection and cancer.

Conclusions:

  • miRNAs play a significant role in CD8(+)T cell biology, influencing development, immune responses, and disease pathogenesis.
  • Further research into miRNA mechanisms offers potential for novel therapeutic strategies.
  • Understanding miRNA biology is critical for advancing CD8(+)T cell-based immunotherapies.