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In Vitro Assay to Evaluate the Impact of Immunoregulatory Pathways on HIV-specific CD4 T Cell Effector Function
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Understanding immune-modulatory efficacy in vitro.

Somanjana Khatua1, Jesus Simal-Gandara2, Krishnendu Acharya3

  • 1Molecular and Applied Mycology and Plant Pathology Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, West Bengal, India; Department of Botany, Krishnagar Government College, Krishnagar, Nadia, 741101, West Bengal, India.

Chemico-Biological Interactions
|December 15, 2021
PubMed
Summary

This review compiles common in vitro immune-modulating assays for drug screening. It highlights widely used methods like MTT assays for cell proliferation and Griess reaction for nitric oxide detection.

Keywords:
Anti-inflammationImmune enhancingMacrophage cell linesModern techniquesPrimer sequencesPrinciple of methods

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Area of Science:

  • Immunology
  • Pharmacology
  • Biotechnology

Background:

  • Modulating the immune system is crucial for treating infections (e.g., SARS-CoV-2), cancer, and inflammatory diseases.
  • Macrophages are key innate immune cells, and their function is a common target for immune-modulating therapeutics.
  • Established cell lines (RAW264.7, J774A.1, THP-1, U937) serve as valuable models for preliminary drug screening.

Purpose of the Study:

  • To review and consolidate commonly employed in vitro immune-modulating techniques for drug discovery.
  • To explain the principles behind various bioassays used in immunomodulation research.
  • To identify the most frequently utilized methods for screening novel therapeutics.

Main Methods:

  • Compilation of existing literature on in vitro immune-modulating assays.
  • Explanation of the principles behind standardized bioassays.
  • Identification of frequently used assays and molecular targets.

Main Results:

  • The MTT assay for cell proliferation, neutral red uptake for phagocytosis, and Griess reaction for nitric oxide (NO) detection are widely used.
  • Polymerase Chain Reaction (PCR) is frequently employed to assess the expression of key immune-related genes (TLRs, COX-2, iNOS, TNF-α, IL-6, IL-1β).
  • Despite numerous available assays, these selected methods are most prevalent in preliminary drug screening.

Conclusions:

  • Standardized in vitro assays are essential for the initial screening of immune-modulating drugs.
  • MTT, neutral red, Griess reaction, and PCR-based gene expression analysis represent core techniques in immunomodulatory research.
  • This review provides a foundational compilation for researchers seeking to understand and apply common immune-modulating bioassays.