Induction of Radiodermatitis in Nude Mouse Model Using Gamma Irradiator IBL 637

Area of Science:

• Oncology
• Dermatology
• Radiation Biology

Background:

• Acute radiodermatitis is a frequent and severe side effect of cancer radiotherapy.
• It can necessitate treatment interruption or cessation.
• Mouse models are crucial for understanding radiation-induced dermatitis and testing new therapies.

Purpose of the Study:

• To review existing mouse models and irradiation devices for radiation dermatitis studies.
• To detail the protocol for inducing radiation dermatitis in SKH1-Hrhr mice.
• To establish a reproducible model for therapeutic development.

Main Methods:

• Construction of a radiation shielding chamber for localized irradiation of the mouse hind leg.
• Implementation of dosimetry for accurate radiation measurement.
• Conducting a dose-finding study to determine optimal irradiation levels (60-70 Gy).

Main Results:

• A functional radiation shielding chamber was successfully created.
• Moderate radiation dermatitis was induced in SKH1-Hrhr mice at 60-70 Gy.
• Symptom onset peaked around 8 days post-irradiation, followed by rapid resolution.
• Histological examination confirmed inflammatory responses characteristic of radiation dermatitis.

Conclusions:

• This study presents the first protocol for inducing moderate radiodermatitis in SKH1-Hrhr nude mice using a cesium-137 gamma irradiator.
• This standardized protocol will facilitate research into novel therapeutic strategies for managing radiation dermatitis.
• The model offers a valuable tool for preclinical testing of treatments aimed at mitigating radiotherapy side effects.