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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

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...
Immunodeficiency Diseases01:25

Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency disorders...

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Related Experiment Video

Updated: Jun 8, 2026

A Strategy for the Study of IL-9-Producing Lymphoid Cells in the Nippostrongylus brasiliensis Infection Model
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Published on: March 3, 2023

IL-7 and lymphopenia.

Frederique Ponchel1, Richard J Cuthbert, Vincent Goëb

  • 1Leeds Institute of Molecular Medicine, Section of Musculoskeletal disease, the University of Leeds, Leeds, UK. F.Ponchel@leeds.ac.uk

Clinica Chimica Acta; International Journal of Clinical Chemistry
|September 21, 2010
PubMed
Summary
This summary is machine-generated.

Interleukin-7 (IL-7) supports T-lymphocyte growth and survival, offering potential for treating T-cell loss in immunodeficiencies. Its levels rise during lymphopenia and fall with T-cell recovery, a mechanism needing further study.

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Area of Science:

  • Immunology
  • Cell Biology
  • Clinical Medicine

Background:

  • Interleukin-7 (IL-7) is crucial for T-lymphocyte development, survival, and homeostasis.
  • Elevated IL-7 levels are observed in various lymphopenic conditions, including HIV infection and chemotherapy-induced T-cell depletion.
  • The precise mechanisms regulating IL-7 levels during lymphopenia and T-cell recovery are not fully understood.

Purpose of the Study:

  • To explore the role of IL-7 in T-cell homeostasis and its therapeutic potential in lymphopenic states.
  • To investigate the dynamic changes in circulating IL-7 levels in response to disease- or treatment-induced lymphopenia.
  • To evaluate the potential of anti-IL-7 therapies for autoimmune diseases where IL-7 may contribute to pathogenesis.

Main Methods:

  • Review of existing literature on IL-7 function and its involvement in T-cell lymphopenia.
  • Analysis of clinical data correlating IL-7 levels with T-cell counts in various disease states.
  • Discussion of the immunological rationale for IL-7-targeted therapies.

Main Results:

  • IL-7 acts as a growth and survival factor for T-lymphocytes, indicating its therapeutic utility in T-cell deficiencies.
  • Circulating IL-7 levels increase during lymphopenia and decrease as T-cell numbers recover.
  • IL-7 is implicated in maintaining peripheral T-cell homeostasis.

Conclusions:

  • IL-7 is a key cytokine for T-cell reconstitution and homeostasis, making it a promising therapeutic target for lymphopenic conditions.
  • Understanding the regulation of IL-7 during lymphopenia is critical for optimizing T-cell recovery strategies.
  • Targeting IL-7 with antagonists is a potential therapeutic approach for autoimmune diseases like Rheumatoid Arthritis and Multiple Sclerosis.