Glutamine supplements are being studied as protectants against the mucositis associated with radiation therapy of head and neck squamous cell carcinoma. Glutamine is an important amino acid for the maintenance of healthy gut function and nitrogen transport. It is also a preferred energy source for many types of tumors through an altered Krebs cycle. The effects of glutamine supplements on the growth of head and neck squamous cell carcinoma have not been studied. Eighteen nude mice were implanted with one established cell line, and 18 were implanted with another. The mice were paired and fed either a glutamine-rich or a glutamine-poor diet. There was not a statistically significant difference in the growth rates of the xenografts or in the weight gain of the mice between the diet groups. These findings are encouraging for the continued use of glutamine supplements in patients with head and neck squamous cell carcinoma.
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