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Salivary epidermal growth factor levels decrease in patients receiving radiation therapy to the head and neck.

H B Dumbrigue¹, P L Sandow, K H Nguyen

¹University of Florida College of Dentistry, Department of Prosthodontics, Gainesville, Florida 32610, USA.

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics

|June 14, 2000

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Salivary epidermal growth factor (EGF) levels decreased during head and neck radiation therapy, correlating with increased oral mucositis severity. This suggests EGF plays a role in radiation-induced mucosal damage.

Area of Science:

Oncology
Biochemistry
Oral Medicine

Background:

Head and neck radiation therapy can cause severe oral mucositis.
Epidermal growth factor (EGF) is crucial for tissue repair and mucosal integrity.

Purpose of the Study:

To assess salivary EGF changes in patients undergoing head and neck radiation.
To determine the correlation between salivary EGF levels and oral mucositis severity.

Main Methods:

Saliva samples collected from 13 patients and 18 controls before, during, and after radiation.
Measured salivary total protein (TP) and EGF concentrations.
Correlated normalized EGF (ngEGF/mgTP) with mucositis scores using statistical analysis.

Main Results:

Related Experiment Videos

Salivary EGF levels significantly decreased (P=.004) during therapy.
Total protein levels increased over time (P=.039).
A strong negative correlation was found between reduced normalized EGF and increased mucositis severity (P=.0001).

Conclusions:

Decreased salivary EGF levels are associated with radiation-induced oral mucositis.
EGF may play a protective role against mucosal breakdown during radiation therapy.
Further research into EGF's role could inform preventative or therapeutic strategies.