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Related Concept Videos

Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

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...
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Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
Normal cells contain receptors that prevent them from being recognized by phagocytes.
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Cytotoxic T Cells-mediated Immune Response01:27

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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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Immune 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.
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Updated: May 21, 2026

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria
13:54

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria

Published on: April 2, 2013

Mapping infected cell phenotype.

U Adiga1, B L Bell, L Ponomareva

  • 1UES, Inc., Dayton, OH 45432, USA. uadiga@ues.com

IEEE Transactions on Bio-Medical Engineering
|June 20, 2012
PubMed
Summary
This summary is machine-generated.

This study models host cell phenotypic changes during bacterial infection, revealing distinct cell phenotypes corresponding to infection stages. This quantitative approach aids in developing defenses against bacterial threats.

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Dual-modality Molecular Cartography: Integrating Multiplex mRNA Detection with Protein Imaging Mass Cytometry
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Last Updated: May 21, 2026

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria
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Published on: April 2, 2013

High-throughput Assay to Phenotype Salmonella enterica Typhimurium Association, Invasion, and Replication in Macrophages
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Dual-modality Molecular Cartography: Integrating Multiplex mRNA Detection with Protein Imaging Mass Cytometry
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Dual-modality Molecular Cartography: Integrating Multiplex mRNA Detection with Protein Imaging Mass Cytometry

Published on: November 14, 2025

Area of Science:

  • Microbiology
  • Computational Biology
  • Cell Biology

Background:

  • Bacterial infections pose significant threats, necessitating advanced defense strategies.
  • Understanding host cell responses to infection is crucial for developing effective therapeutics.
  • Quantitative modeling can reveal empirical relationships between infection progression and host cell phenotypes.

Purpose of the Study:

  • To develop a quantitative model correlating host cell phenotypic changes with bacterial infection stages.
  • To establish a statistically reliable model for predicting infection progression and informing therapeutic strategies.
  • To explore the relationship between host cell phenotype and infection by *Francisella tularenesis* (Ft).

Main Methods:

  • Collected thousands of host cell images over 72 hours with 2-hour sampling frequency during *Francisella tularenesis* infection.
  • Utilized automatic, parallel region growing for macrophage segmentation in cell images.
  • Calculated over two thousand feature descriptors for host cells and employed multidimensional scaling and hierarchical clustering for cell grouping.

Main Results:

  • Identified distinct host cell phenotype classes based on measurable features.
  • Successfully mapped these phenotype classes to different stages of bacterial infection.
  • Demonstrated the feasibility of using quantitative phenotypic analysis to track infection progression.

Conclusions:

  • Quantitative modeling of host cell phenotypes provides a robust method for understanding bacterial infection dynamics.
  • The identified phenotype-infection stage correlations can inform the development of novel therapeutic interventions.
  • This approach offers a foundation for early detection and management of bacterial infections.