Soy Isoflavones in Preventing Head and Neck Cancer Recurrence in Patients With Stage I-IV Head and Neck Cancer Undergoing Surgery

PRIMARY OBJECTIVES:

I. To determine if short term, preoperative (300 mg/day x 14 treatment days) soy isoflavone
supplementation modulates p16 methylation (% CpG sites methylated) and expression of p16,
cyclooxygenase 2 [COX-2], vascular endothelial growth factor receptor [VEGF], epidermal
growth factor receptor [EGFR], interleukin-6 [IL6], p53 and B-cell lymphoma-extra large
[Bcl-xL] in tumor and non-tumor adjacent mucosa of patients with head and neck squamous
carcinoma undergoing curative tumor resection.

II. To estimate correlations of tumor p16 methylation (% CpG sites methylated) with
expression of p16 and levels of, IL6, VEGF, and 15-F2t-isoprostane in serum and saliva.

SECONDARY OBJECTIVES:

I. Describe the toxicity of short-term, preoperative treatment with soy isoflavone.

II. To determine overall and relapse-free survival.

OUTLINE:

Patients receive soy isoflavones orally (PO) for approximately 14 days before undergoing
surgery.

After completion of treatment, patients are followed up, within the routine cancer
management schedule, at 3, 6, 12, and 24 months.

Inclusion Criteria:

- Patients must have pathologically-confirmed, resectable, squamous cell carcinoma of
the oral cavity, oropharynx, larynx or hypopharynx

- Disease must be Stage I, II, III or IVa

- Tumor must be potentially surgically resectable and curable with conventional surgery
and radiation therapy

- Eastern Cooperative Oncology Group (ECOG) Performance status 0-2

- Patients must give documented informed consent to participate in this study

Exclusion Criteria:

- Documented evidence of distant metastases

- Ongoing acute medical condition such as uncontrolled coronary artery disease,
emphysema, or diabetes mellitus that would preclude surgical resection

- Pregnancy or lactation; patients of child bearing age must agree to use adequate
contraception (hormonal or barrier method of birth control) prior to study entry and
for the duration of soy administration

- A medical or psychiatric illness which would compromise the patient's ability to
tolerate this treatment or comply with administration of study drug

- Patients residing in prison

- Any patient with a history of breast or ovarian cancer

- Allergy to soy products