Related Experiment Video
Updated: Jul 28, 2026
10:43
Polarization of M1 and M2 Human Monocyte-Derived Cells and Analysis with Flow Cytometry upon Mycobacterium tuberculosis Infection
Published on: September 18, 2020
Macrophage response to Mycobacterium tuberculosis infection
D Gammack1, C R Doering, D E Kirschner
1Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 49109, USA.
Journal of Mathematical Biology
|January 28, 2004
Summary
This study models the early immune response to Mycobacterium tuberculosis (Mtb) infection. The mathematical model predicts conditions for bacterial clearance or granuloma formation, offering insights into tuberculosis control.
Area of Science:
- Immunology
- Mathematical Biology
- Computational Science
Background:
- Tuberculosis (TB) is caused by Mycobacterium tuberculosis (Mtb).
- Immune response involves granuloma formation in the lungs.
- Granuloma structure and immune cell distribution remain poorly understood.
Purpose of the Study:
- To develop a mathematical model of the early immune response to Mtb.
- To investigate the dynamics of macrophage and Mtb populations within granulomas.
- To identify conditions leading to infection control or uncontrolled granuloma growth.
Main Methods:
- Coupled reaction-diffusion-advection partial differential equations.
- Modeling of macrophage, Mtb populations, and a chemokine.
- Application of internal states and internal velocity concepts.
- Numerical simulations for controlled and uncontrolled granuloma growth.
Main Results:
- The model simulates granuloma formation and immune cell transport.
- Distinct outcomes of controlled versus uncontrolled granuloma growth were observed.
- Analytical conditions for bacterial population decrease (clearance) or increase (granuloma formation) were determined.
Conclusions:
- The mathematical model provides a framework for studying early Mtb infection dynamics.
- The model elucidates factors influencing granuloma formation and TB progression.
- Insights gained can inform strategies for TB management and treatment.
Related Concept Videos
01:40Cell-mediated Immune Responses
Overview
01:25Immune Surveillance by NK Cells and Phagocytes
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
01:31Defense Against Bacterial Pathogens
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
01:29Immune Response Against Viral Pathogens
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.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
01:28Pulmonary Tuberculosis II
Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
01:23Tuberculosis
Tuberculosis (TB) remains a significant global health concern, primarily targeting the lungs and spreading through airborne transmission. Infection begins when aerosolized droplet nuclei, expelled by an individual with active TB, are inhaled by another person. These microscopic particles carry Mycobacterium tuberculosis, the causative agent of TB. Upon reaching the alveoli, the bacilli are engulfed by alveolar macrophages. However, due to their specialized lipid-rich cell wall, these pathogens...