Prospective Study of Positron Emission Tomography for Evaluation of the Activity of Lapatinib, a Dual Inhibitor of the ErbB1 and ErbB2 Tyrosine Kinases, in Patients with Advanced Tumors
Autor: | Makoto Tahara, Hironobu Minami, Yoshiki Kojima, Takashi Sato, Hirofumi Mukai, Kaoru Shimokata, Hiromichi Ebi, Kenji Kawada, Koji Murakami |
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Rok vydání: | 2006 |
Předmět: |
Adult
Male Oncology Cancer Research Pathology medicine.medical_specialty Receptor ErbB-2 Colorectal cancer Phases of clinical research Antineoplastic Agents Lapatinib Breast cancer Fluorodeoxyglucose F18 Trastuzumab Neoplasms Internal medicine medicine Humans Radiology Nuclear Medicine and imaging Prospective Studies Prospective cohort study Protein Kinase Inhibitors Aged medicine.diagnostic_test business.industry General Medicine Middle Aged medicine.disease ErbB Receptors Treatment Outcome Positron emission tomography Positron-Emission Tomography Quinazolines Biomarker (medicine) Female Radiopharmaceuticals Tomography X-Ray Computed business medicine.drug |
Zdroj: | Japanese Journal of Clinical Oncology. 37:44-48 |
ISSN: | 1465-3621 0368-2811 |
Popis: | Background: To evaluate the role of FDG-PET in assessing anti-tumor efficacy of molecular targeted drugs, we prospectively performed FDG-PET and CT for response evaluation in patients treated with lapatinib, a dual inhibitor of ErbB1 and ErbB2 tyrosine kinases. Methods: Lapatinib was given orally once a day at doses ranging from 1200 to 1800 mg in a phase I study. CT and FDG-PET were performed before treatment, and at 1, 2 and 3 months after the initiation of the treatment and every 2 months thereafter. Results: A total of 29 FDG-PET examinations were performed in eight patients with various solid tumors and the metabolic activity in the tumor was evaluated as SUVmax. The best responses, as assessed by CT, were as follows; one partial response, four stable disease and three disease progression. The partial response was observed in a patient with trastuzumabresistant breast cancer, whose SUVmax was decreased by 60% from baseline. In all of the four patients whose best response was stable disease, the SUVmax was decreased by 6-42% one month after the start of treatment. Prolonged stable disease (10 months) was observed in a patient with colon cancer, whose SUVmax was decreased by 42%. In the patient group with disease progression, SUVmax was increased in two out of three patients. Conclusions: FDG-PET detected decreases in the metabolic activity of the tumors in patients who experienced clinical benefits on treatment with lapatinib. Thus, FDG-PET may be useful for the evaluation of molecular targeted drugs, such as lapatinib. |
Databáze: | OpenAIRE |
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