Radiation Therapy and Cisplatin with or without Triapine in Treating Patients with Newly Diagnosed Stage IB2, II, or IIIB-IVA Cervical Cancer or Stage II-IVA Vaginal Cancer

This randomized phase II trial studies radiation therapy and cisplatin with triapine to see how well they work compared to the standard radiation therapy and cisplatin alone in treating patients with newly diagnosed stage IB2, II, or IIIB-IVA cervical cancer or stage II-IVA vaginal cancer. Radiation therapy uses high energy protons to kill tumor cells and shrink tumors. Drugs used in chemotherapy, such as cisplatin, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Triapine may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. It is not yet known whether radiation therapy and cisplatin are more effective with triapine in treating cervical or vaginal cancer.

Inclusion Criteria

• Patient has a new, unrated histologic diagnosis of stage IB2 (> 5 cm), II, IIIB or IVA squamous, adenocarcinoma, or adenosquamous carcinoma of the uterine cervix or stage II-IVA squamous, adenocarcinoma, or adenosquamous carcinoma of the vagina not amenable to curative surgical resection alone ; the presence or absence of para‐aortic lymph node metastasis will be based on pre-therapy 18F‐FDG PET/CT; if the baseline 18F‐FDG PET/CT identifies hypermetabolic para‐aortic disease, such patients will NOT be eligible; the patient must be able to tolerate imaging requirements of an 18F‐FDG PET/CT scan
• Patient must provide study specific informed consent prior to study entry
• Patient must have a Gynecologic Oncology Group (GOG) performance status of 0, 1, or 2 or equivalent
• Absolute neutrophil count > 1,500/uL
• Platelets > 100,000/uL
• Hemoglobin > 10 g/dL
• Total bilirubin < 2.0 mg/dL
• Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase [SGOT])/alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase [SGPT]) < 2.5 X institutional upper limit of normal
• Prothrombin time (PT)/activated partial thromboplastin time (aPTT) < 1.5 X institutional upper limit of normal
• Creatinine =< 1.5 mg/dL to receive weekly cisplatin * Patients whose serum creatinine is between 1.5 and 1.9 mg/dL are eligible for cisplatin if the estimated creatinine clearance (CCr) is >= 30 ml/min; for the purpose of estimating the CCr, the formula of Cockcroft and Gault for females should be used
• Patient does not have uncontrolled diabetes mellitus (i.e., fasting blood glucose > 200 mg/dL)
• Patient has a life expectancy of greater than 20 weeks
• Patient does not have known brain metastases (testing optional)
• Patient does not have known human immunodeficiency virus syndrome (HIV, testing optional); known HIV-positive patients receiving combination antiretroviral therapy are ineligible
• Patient does not have a known allergy to compounds of similar or biologic composition as triapine
• Patient does not have known glucose‐6‐phosphate dehydrogenase (G6PD) deficiency (G6PD testing optional)
• Patient is not actively breastfeeding (or has agreed to discontinue breastfeeding before the initiation of protocol therapy)

Exclusion Criteria

• Patient has another concurrent active invasive malignancy
• Patient has had a prior invasive malignancy diagnosed within the last three years (except [1] non-melanoma skin cancer or [2] prior in situ carcinoma of the cervix); patients are excluded if they have received prior pelvic radiotherapy for any reason that would contribute radiation dose that would exceed tolerance of normal tissues at the discretion of the treating physician
• Patient has uncontrolled intercurrent illness including, but not limited to, symptomatic congestive heart failure, unstable angina pectoris, myocardial infarction within six months of protocol initiation, cardiac arrhythmia within six months of protocol initiation; known inadequately controlled hypertension; clinically significant pulmonary disease including dyspnea at rest, or patients requiring supplemental oxygen, or poor pulmonary reserve; proteinuria or clinically significant renal function impairment (baseline serum creatinine > 2 mg/dL); or psychiatric illness/social situations that would limit compliance with study requirements
• Patient is receiving another investigational agent for the treatment of cancer
• Patient is currently pregnant; patient must agree to use two forms of birth control if they are of child-bearing potential
• Patients who have had a hysterectomy or are planning to have an adjuvant hysterectomy following radiation as part of their cervical cancer treatment are ineligible
• Patients scheduled to be treated with adjuvant consolidation chemotherapy at the conclusion of their standard chemoradiation
• Patients with self-reported or known diagnosis of G6PD deficiency

PRIMARY OBJECTIVES:

I. To evaluate the efficacy of the experimental regimen of triapine (3AP), cisplatin, and radiation to increase progression-free survival relative to the standard/control regimen of cisplatin and radiation in women with uterine cervix and vaginal cancer.

SECONDARY OBJECTIVES:

I. To determine the post-therapy 3-month fludeoxyglucose F-18 (18F-FDG) positron emission tomography (PET)/computed tomography (CT) metabolic complete rate of response rate in the cervix and vaginal by treatment arm.

II. To determine overall survival after triapine-cisplatin radio-chemotherapy and cisplatin radio-chemotherapy.

III. To evaluate incidence and severity of hematologic and gastrointestinal (GI) adverse events by radiation modality; image guided intensity modulated radiation therapy (IG-IMRT) versus conventional pelvic radiotherapy.

IV. To summarize and compare differences in acute adverse events (Common Terminology Criteria for Adverse Events [CTCAE], version [v]4.0) by treatment arm and radiation modality.

V. To summarize and compare differences in chronic or late (>= 30-days from off study treatment date) adverse events (CTCAE, v4.0) by treatment arm and by radiation modality.

TERTIARY OBJECTIVES:

I. To determine peripheral blood methemoglobin proportion before and after triapine infusion (optional for Arm 2 patients).

II. To explore whether knowledge-based planning (KBP) can improve IG-IMRT plans compared to plans that would have been delivered without KBP, estimate the resulting toxicity reduction using normal tissue complication probability (NTCP) models, and determine whether KBP should be a requirement for future IG-IMRT protocols.

OUTLINE: Patients are randomized to 1 of 2 treatment arms.

ARM I: Patients receive cisplatin intravenously (IV) over 90 minutes on days 2, 9, 16, 23, 30, (and day 36 or 37 at the treating physician's discretion). Patients then undergo external beam radiation therapy (EBRT) (either conventional radiation therapy [RT] or intensity modulated radiation therapy [IMRT]) once daily (QD) 5 days a week for 25 fractions followed by low dose rate (LDR) or high dose rate (HDR) brachytherapy according to institution's standards. Treatment continues in the absence of disease progression or unacceptable toxicity.

ARM II: Patients receive cisplatin and undergo EBRT followed by brachytherapy as in Arm I. Patients also receive triapine IV over 2 hours on days 1, 3, 5, 8, 10, 12, 15, 17, 19, 22, 24, 26, 29, 31, and 33. Treatment continues in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up at 1 and 3 months, every 3 months for 2 years, and then every 6 months for 3 years.

The patient data from NCI #9434 will be merged with NRG-GY006 per the Protocol Analysis Plan.

Lead Organization
NRG Oncology

Principal Investigator
Charles A. Leath