[Establish stable cell line to express M2 ion channel of influenza A virus H5N1]

Area of Science:

• Virology
• Molecular Biology
• Biophysics

Context:

• The M2 ion channel protein is a critical target for developing antiviral therapies against influenza A virus.
• Influenza A virus poses a significant global health threat, necessitating novel therapeutic strategies.
• Understanding M2 ion channel function is crucial for combating viral infections.

Purpose:

• To establish a stable HEK293 cell line that expresses the H5N1 influenza A virus M2 ion channel (H5M2).
• To validate the tetracycline-inducible expression and functional activity of the H5M2 protein.
• To demonstrate the utility of this cell line for screening M2 ion channel inhibitors.

Summary:

• The H5N1 influenza A virus M2 ion channel (H5M2) gene was successfully cloned into the pcDNA4 vector, leading to the establishment of a stable HEK293 cell line.
• Tetracycline-inducible expression of H5M2 protein was confirmed via immunofluorescence and Western blot, with functional ion channel activity verified by whole-cell patch-clamp recordings.
• Amantadine effectively blocked H5M2 channel conductance, validating the model's potential for drug screening.

Impact:

• Provides a robust cellular model for high-throughput screening of novel M2 ion channel inhibitors.
• Facilitates the discovery of new antiviral drugs targeting influenza A virus.
• Contributes to the development of effective strategies against influenza A virus infections.