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Related Concept Videos

Mouse Models of Cancer Study02:43

Mouse Models of Cancer Study

Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...

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An Experimental Model to Study Tuberculosis-Malaria Coinfection upon Natural Transmission of Mycobacterium tuberculosis and Plasmodium berghei
09:02

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Published on: February 17, 2014

A humanized mouse model of tuberculosis.

Veronica E Calderon1, Gustavo Valbuena, Yenny Goez

  • 1Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America.

Plos One
|May 22, 2013
PubMed
Summary
This summary is machine-generated.

Researchers developed a humanized mouse model to study tuberculosis (TB) and HIV co-infection. This model shows progressive bacterial infection and human T cell responses, offering new insights into TB pathogenesis.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Animal Models

Background:

  • Tuberculosis (TB) remains a leading infectious cause of death globally, particularly in individuals with HIV/AIDS.
  • Existing animal models for TB have limitations in replicating human pathology and studying HIV/TB co-infection.
  • Humanized mice are increasingly used for studying human infections where traditional models fall short.

Purpose of the Study:

  • To develop and validate a small animal model of Mycobacterium tuberculosis (M.tb) infection using bone marrow, liver, thymus (BLT) humanized mice.
  • To assess the suitability of this model for studying HIV/M.tb co-infection.

Main Methods:

  • NOD-SCID/γc(null) mice were engrafted with human fetal liver and thymus tissue, supplemented with CD34(+) cells.
  • Leukocyte reconstitution was confirmed by human CD45 expression; immune cell populations (T cells, NK cells, monocytes/macrophages) and their function were analyzed.
  • Mice were infected intranasally with M.tb, and bacterial load, pathology, and human T cell distribution were assessed over 8 weeks.

Main Results:

  • Successful reconstitution of human immune cells, including functional T cells, was achieved in BLT humanized mice.
  • Intranasal M.tb infection led to progressive bacterial growth in the lungs, spleen, and liver.
  • Pulmonary TB pathology included granuloma formation, caseous necrosis, and cholesterol crystal deposition.
  • Human T cells localized to sites of infection and inflammation, particularly around granulomas.

Conclusions:

  • The BLT humanized mouse model demonstrates potential for studying experimental tuberculosis.
  • This model allows for the investigation of M.tb infection with human immune system components in vivo.
  • It may serve as a valuable platform for exploring HIV/M.tb co-infection dynamics.