Gene therapy of advanced-stage head and neck squamous cell carcinoma with Mycobacterium leprae heat shock protein 65 DNA: a phase 1 study / Fase 1 do estudo da aplicação da vacina de DNA HSP 65 (Heat Shock Protein) do Mycobacterium leprae no tratamento de formas avançadas de carcinomas epidermóide de cabeça e pescoço

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

This study goal was to describe and graduate the local and systemic toxicity of intratumoral injections of HSP (Heat Shock Protein) 65 DNA vaccine in advanced-stage head and neck squamous cell carcinoma (SCCHN) patients and to define the highest well tolerated dose for them. This is a prospective, non-randomized, uncontrolled, phase 1 study, using a new vaccine to treat eighteen patients with advanced-stage SCCHN patients without any option for curative treatment, Karnofsky performance status greater than 70% and no organ failure. The patients were divided into 3 groups of 6 patients each one, receiving different vaccine doses, 150ug; 600ug e 1200ug per dose, respectively. They received three injections with a 21 days interval. The patients were rigorously evaluated into their clinical and laboratory aspects looking for adverse events (AE) during 90 days. Toxic effects were monitored according to National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE). In the first group (150ug) one patient died due to an ulcerate lesion extensive bleeding before the protocol end. All the patients referred pain increase; tree had greater edema; two had strong fatigue; tree presented with cutaneous infections of head and neck and one with an acute sinusitis. In the second group (600ug) three patients died before the 90th day protocol, all considered unrelated to treatment, following described: gastrostomy complications, a fatal bleeding after rapid progression of the tumor and pulmonary carcinomatosis. In this group one patient didnt have adverse events; five had pain worsening; four had increase of edema; two had greater fatigue; tree had facial cellulitis and two had acute sinusitis. Due to grade 3 and 4 adverse events occurred in more than one third of patients of this group we decided to lower the dose of the third group to 400ug. In the last group three patients also died before protocol completion, all due to cancer progression, so we had to include three more patients in this group. All of them presented greater pain; tree had increasing of edema; tree had fatigue worsening; tree had pulmonary infections; one had acute sinusitis and lymphoadenomegalia besides the tumor lesion. We concluded that intratumoral injections of M.leprae HSP 65 DNA in advanced-stage SCCHN patients is safe at the dose of 400ug/injection and cause tumor flare adverse events and an increase rate of local and respiratory infections.

ASSUNTO(S)

cancer vaccines/administration &dosage cancer vaccines/adverse effects carcinoma squamous cell 5-head and neck neoplasms vacinas anti-câncer/administração &dosagem carcinoma de células escamosas cancer vaccines/toxicity vacinas anti-câncer/efeitos adversos neoplasias de cabeça e pescoço vacinas anticâncer/toxicidade

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