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Establishment of an Oronasal Fistula Mice Model

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Developing a mouse model of acute bacterial rhinosinusitis.

Mingzhu Jin¹, Zhaowei Gu, Zhigang Bian

¹Department of Otolaryngology, Shengjing Hospital of China Medical University, Sanhao Street 36, Shenyang, Liaoning, China. jinmingzhu1984@sohu.com

European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery

|January 27, 2011

Summary

Researchers developed a new mouse model for acute bacterial rhinosinusitis using methicillin-resistant Staphylococcus aureus (MRSA). This less invasive method successfully induced rhinosinusitis, offering a valuable tool for studying the condition.

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Area of Science:

Otorhinolaryngology
Infectious Diseases
Animal Models

Background:

Acute bacterial rhinosinusitis (ABRS) is a common condition requiring effective research models.
Existing models for studying ABRS in mice often involve invasive procedures.

Purpose of the Study:

To establish a novel, less invasive mouse model for acute bacterial rhinosinusitis.
To utilize methicillin-resistant Staphylococcus aureus (MRSA) for inducing the condition in a controlled manner.

Main Methods:

179 BALB/c mice were divided into four groups: MRSA-impregnated sponges, sterile saline sponges, direct MRSA inoculation, and untreated control.
Mice were euthanized on days 1, 4, 7, and 14 post-inoculation.
Nasal lavage and histological examination were performed to assess inflammation and bacterial presence.

Main Results:

Successful induction of acute bacterial rhinosinusitis in mice treated with MRSA-impregnated sponges.
Partial, less severe inflammation observed in mice receiving sterile saline sponges compared to the MRSA sponge group (P ≤ 0.05).
No significant inflammatory reactions were noted in the direct inoculation or control groups.

Conclusions:

A successful and less invasive mouse model for acute bacterial rhinosinusitis was developed.
The MRSA-impregnated sponge technique offers a potentially more reversible method for ABRS research.
This model provides a valuable platform for investigating ABRS pathogenesis and therapeutic strategies.