Optimizing Tear Collection in Mice for mRNA and Protein Analysis

Area of Science:

• Ophthalmology
• Biomolecular Analysis
• Animal Research

Background:

• The tear film is a dynamic biofluid reflecting molecular changes in ocular and systemic diseases.
• Tear analysis offers a non-invasive method for disease diagnosis, monitoring, and biomarker identification.
• Existing tear sampling methods require specific skills and tools, especially for animal models.

Purpose of the Study:

• To describe an optimized protocol for tear protein analysis in mice.
• To establish a standardized and efficient method for tear sample collection in animal models.
• To facilitate translational research by bridging human and animal tear analysis.

Main Methods:

• Pharmacological stimulation of tear production in 2-month-old mice.
• Tear sample collection using Schirmer strips.
• Evaluation of protocol efficacy using SDS-PAGE, qPCR, and digital PCR (dPCR).

Main Results:

• The described protocol effectively extracts tear-related protein information from mice.
• The method is shown to be efficient and suitable for various experimental paradigms.
• The protocol provides a standardized approach for tear sampling in animal models.

Conclusions:

• An optimized, affordable, and standardized tear sampling protocol for animal models has been established.
• This protocol can significantly aid in the investigation of tear protein signatures.
• The method supports translational research, accelerating ocular and systemic disease studies.