Presenter: D.M. Brizel Presenter's Affiliation: Duke University Type of Session: Scientific
Background Evidence from recent studies suggest that the combination of chemotherapy and radiation therapy improves outcome in advanced head and neck cancers, compared to single modality therapy. But these aggressive therapies frequently cause increases in treatment-related morbidity. Recombinant Human Keratinocyte Growth Factor (rHuKGF)stimulates the proliferation of epithelial tissues including the mucosa of the aerodigestive tract. Preclinical studies have shown that rHuKGF reduces the severity of RT and CT induced mucositis.
60 patients with non-metastatic, previously untreated, stage 3 or 4 squamous cell HNC received hyperfractionated RT (1.25 Gy bid to a total dose of 72.5 Gy over < 7 weeks) and continuous infusion 5-FU (1000 mg/m2 /day for 4 days) and bolus cisplatin (100 mg/m2 during weeks 1 and 5).
A planned break in RT occurred at week 4.
Patients underwent randomization to receive intravenous rHuKGF (20, 40, 60, 80 ug/kg) or placebo, respectively, for 3 days immediately prior to the initiation of RT/CT, and then weekly for a total of 10 doses.
There was no stratification for T stage, N stage, performance status, or disease site.
Study endpoints included KGF-associated toxicity and the incidence and duration of severe mucositis (RTOG grade >= 3 ), acute pharyngitis and salivary gland toxicity (RTOG grade >= 2).
About half of the patients had cancer of the oropharynx.
75% of patients had stage IV disease.
The only adverse effects attributable to KGF were skin flushing in 15% of patients and excess salivation in 2%.
Transient, asymptomatic elevations in serum lipase and amylase were observed at all KGF dose levels with three consecutive days of dosing.
Mucositis, dysphagia and xerostomia were significantly reduced in the rHuKGF Group.
There were no significant differences in 1-year actuarial local-regional control, failure-free survival, & survival for placebo and KGF patients.
Overall survival was about 70% at 2 years for both groups.
KGF was well tolerated at the dose levels in this study.
A larger scale phase II study is required to better evaluate the efficacy of rHuKGF.
The addition of KGF may allow for more aggressive regimens in the treatment of advanced head and neck cancers. At this time, there is no evidence that KGF stimulates proliferation of tumor cells, as evidenced by the survival data in this study.
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Nov 26, 2014 - In patients with locally advanced head and neck cancer who hadn't undergone surgery, concurrent radiotherapy and non-platinum chemotherapy was associated with fewer recurrences and deaths over 10 years, according to research published online Oct. 28 in The Lancet Oncology.