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Related Experiment Video

Updated: Jun 22, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

[Not Available].

C C Bowman1, K L Bost

  • 1Department of Biology, University of North Carolina at Charlotte, Charlotte, NC 28223.

The Open Microbiology Journal
|June 23, 2009
PubMed
Summary
This summary is machine-generated.

Salmonella infection limits protective T helper type 1 responses by increasing prostaglandin E₂ (PGE₂) via cyclooxygenase-2 (COX-2). Inhibiting COX-2 enhances IL-12 and IFN-γ secretion, boosting the host

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Area of Science:

  • Immunology
  • Microbiology
  • Pharmacology

Background:

  • Salmonella typhimurium infection elicits a T helper type 1 (Th1) response, crucial for host defense.
  • The magnitude of the Th1 response is often insufficient to control Salmonella pathogenesis.
  • Cyclooxygenase-2 (COX-2) activity and prostaglandin E₂ (PGE₂) production are elevated during Salmonella infection.

Purpose of the Study:

  • To investigate the role of COX-2-derived PGE₂ in limiting Th1 responses during Salmonella infection.
  • To determine if inhibiting COX-2 can enhance the Th1 response against Salmonella.

Main Methods:

  • In vitro studies using antigen-presenting cells and Salmonella.
  • Measurement of Interleukin-12 (IL-12) and Interferon-gamma (IFN-γ) secretion.

Related Experiment Videos

Last Updated: Jun 22, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

  • Utilizing celecoxib, a selective COX-2 inhibitor, to block enzyme activity.

    • Main Results:

    • Salmonella infection induced IL-12 and IFN-γ production in vitro.
    • Inhibition of COX-2 activity with celecoxib significantly enhanced IL-12 and IFN-γ secretion.
    • These findings indicate that COX-2 activity suppresses the Salmonella-induced Th1 response.

    Conclusions:

    • COX-2-mediated PGE₂ production acts as a negative regulator of the Th1 immune response to Salmonella.
    • Blocking COX-2 activity represents a potential strategy to augment host defense against Salmonella infection.