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Gene expression of TRPMLs and its regulation by pathogen stimulation

Zhiqiang Xia1, Lixia Xie1, Dongyuan Li1

  • 1School of Biological and Food Processing Engineering, Huanghuai University, Zhumadian 463000, China.

Gene
|February 22, 2023
PubMed

Insights

Transient Receptor Potential Mucolipin (TRPML) channels are highly expressed in mouse lungs. Their expression changes with pathogen invasion, suggesting TRPMLs

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • The Transient Receptor Potential Mucolipin (TRPML) subfamily comprises TRPML1, TRPML2, and TRPML3, crucial for Ca2+ homeostasis, endosomal pH, membrane trafficking, and autophagy.
  • Previous research links TRPMLs to pathogen invasion and immune regulation in various tissues, but their role in lung immunity remains unclear.

Purpose of the Study:

  • To investigate the expression patterns of TRPML1, TRPML2, and TRPML3 in mouse tissues, particularly the lung, in response to pathogen stimulation.
  • To elucidate the role of TRPML channels in innate immunity and inflammatory responses within lung cells.

Main Methods:

  • Quantitative Reverse Transcription Polymerase Chain Reaction (qRT-PCR) to assess TRPML gene expression in mouse tissues and A549 cells.
  • Stimulation of cells and tissues with Salmonella and Lipopolysaccharide (LPS) to mimic pathogen invasion.
  • Treatment with specific TRPML1 or TRPML3 activators to evaluate downstream inflammatory responses.

Main Results:

  • All three TRPML channels were highly expressed in mouse lung, spleen, and kidney tissues.
  • Salmonella or LPS treatment significantly downregulated TRPML1 and TRPML3 expression but upregulated TRPML2 in mouse tissues and A549 cells.
  • Activation of TRPML1 or TRPML3 dose-dependently increased inflammatory factors IL-1β, IL-6, and TNFα.

Conclusions:

  • TRPML channel expression is dynamically regulated by pathogen stimulation in lung tissues and cells.
  • TRPML1 and TRPML3 appear to play significant roles in immune and inflammatory regulation within the lung.
  • TRPML channels represent potential novel targets for modulating innate immunity and controlling pathogen invasion.
Keywords:
Lung tissuePathogen invasionSpecific activatorTRPMLqRT-PCR

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