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Diversity in Cell Signaling Responses01:22

Diversity in Cell Signaling Responses

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The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
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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...
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The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix
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Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix

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CD4 T cell responses to flaviviruses.

Judith H Aberle1, Maximilian Koblischke1, Karin Stiasny1

  • 1Center for Virology, Medical University of Vienna, Vienna, Austria.

Journal of Clinical Virology : the Official Publication of the Pan American Society for Clinical Virology
|October 13, 2018
PubMed
Summary
This summary is machine-generated.

Flaviviruses threaten global health, but understanding CD4 T cell responses is key to developing effective vaccines. Research highlights how these cells aid antibody production for long-lasting immunity against flavivirus infections.

Keywords:
CD4 T cellDengueEpitopeFlavivirusFlavivirus vaccineImmunodominanceTBEZika

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Area of Science:

  • Immunology
  • Virology
  • Vaccinology

Background:

  • Flaviviruses represent a significant global health concern, causing severe diseases.
  • CD4 T cells are crucial for protective immunity, supporting antibody production against flaviviruses.
  • Recent research has advanced understanding of T cell responses to flaviviruses.

Purpose of the Study:

  • To summarize current knowledge on human CD4 T cell responses to flaviviruses.
  • To emphasize the role of CD4 T cells in supporting neutralizing antibody production.
  • To review advances in epitope identification and factors influencing T cell responses.

Main Methods:

  • Review of recent scientific literature on flavivirus immunology.
  • Analysis of T cell antigen specificities and effector functions.
  • Examination of epitope mapping using structural data.

Main Results:

  • New insights into CD4 T cell antigen specificities and functions in flavivirus infections.
  • Identification of regulatory mechanisms governing T cell responses.
  • Progress in mapping flavivirus epitopes relevant to T cell recognition.

Conclusions:

  • Durable protective immunity against flaviviruses relies on effective CD4 T cell responses.
  • Understanding T cell help for B cells is critical for vaccine development.
  • Strategies are emerging to improve T cell-mediated antibody responses for enhanced flavivirus vaccines.