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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.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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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Cytotoxic T Cells-mediated Immune Response

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.
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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.
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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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Las respuestas inmunes celulares al VIH.

A J McMichael1, S L Rowland-Jones

  • 1MRC Human Immunology Unit, Institute of Molecular Medicine, John Radcliffe Hospital, Oxford OX3 9DS, UK.

Nature
|April 20, 2001
PubMed
Resumen

La infección por el virus de la inmunodeficiencia humana (VIH) afecta las respuestas de las células T, lo que lleva al colapso del sistema inmunológico. Esta disfunción inmune celular permite que el virus se escape del control y persista.

Área de la Ciencia:

  • Inmunología Inmunología.
  • Virología Virología.
  • Biología celular Biología celular.

Sus antecedentes:

  • La respuesta inmune celular, principalmente los linfocitos T, es crucial para controlar las infecciones virales.
  • La infección por el virus de la inmunodeficiencia humana (VIH) presenta un desafío único para el control inmunológico a pesar de una respuesta aparentemente robusta de las células T.

Objetivo del estudio:

  • Investigar los mecanismos por los cuales el VIH evadir el control inmune.
  • Comprender cómo el VIH afecta tanto a las células T infectadas como a las no infectadas.

Principales métodos:

  • Análisis de la función de los linfocitos T (CD4+ y CD8+) durante la infección por el VIH.
  • Examen de las interacciones de las células inmunes y los mecanismos de escape viral.

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Principales resultados:

  • El VIH infecta las células inmunes críticas, incluidas las células T CD4 +.
  • La función deteriorada tanto de las células T CD4+ infectadas como de las células T CD8+ no infectadas contribuye a la persistencia viral.
  • El fracaso de las células T CD8+ para controlar el VIH facilita el escape viral.

Conclusiones:

  • El VIH socava activamente la respuesta inmune celular del huésped.
  • El deterioro de la inmunidad mediada por células T es fundamental para la patogénesis del VIH y el eventual colapso del sistema inmunitario.