Initial results of hypoxia imaging using 1-α-d-(5-deoxy-5-[18F]-fluoroarabinofuranosyl)-2-nitroimidazole (18F-FAZA)
| Autor: | Piyush Kumar, Ernst J. Postema, Dacia A. Richmond, Leonard I. Wiebe, Douglas N. Abrams, Alexander J.B. McEwan, T. Riauka |
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| Rok vydání: | 2009 |
| Předmět: |
Adult
Male Fluorine Radioisotopes Biodistribution Pathology medicine.medical_specialty Lung Neoplasms Adolescent Lymphoma Standardized uptake value Young Adult In vivo Carcinoma Non-Small-Cell Lung Neoplasms medicine Carcinoma Humans Radiology Nuclear Medicine and imaging Carcinoma Small Cell Hypoxia Lung cancer Aged Aged 80 and over medicine.diagnostic_test business.industry Glioma General Medicine Middle Aged Hypoxia (medical) medicine.disease Head and Neck Neoplasms Nitroimidazoles Positron emission tomography Positron-Emission Tomography Carcinoma Squamous Cell Female Radiopharmaceuticals medicine.symptom business |
| Zdroj: | European Journal of Nuclear Medicine and Molecular Imaging. 36:1565-1573 |
| ISSN: | 1619-7089 1619-7070 |
| DOI: | 10.1007/s00259-009-1154-5 |
| Popis: | Tumour hypoxia is thought to play a significant role in the outcome of solid tumour therapy. Positron emission tomography (PET) is the best-validated noninvasive technique able to demonstrate the presence of hypoxia in vivo. The locally developed PET tracer for imaging hypoxia, 1-alpha-D: -(5-deoxy-5-[(18)F]-fluoroarabinofuranosyl)-2-nitroimidazole ((18)F-FAZA), has been shown to accumulate in experimental models of tumour hypoxia and to clear rapidly from the circulation and nonhypoxic tissues. The safety and general biodistribution patterns of this radiopharmaceutical in patients with squamous cell carcinoma of the head and neck (HNSCC), small-cell lung cancer (SCLC) or non-small-cell lung cancer (NSCLC), malignant lymphoma, and high-grade gliomas, were demonstrated in this study.Patients with known primary or suspected metastatic HNSCC, SCLC or NSCLC, malignant lymphoma or high-grade gliomas were dosed with 5.2 MBq/kg of (18)F-FAZA, then scanned 2-3 h after injection using a PET or PET/CT scanner. Images were interpreted by three experienced nuclear medicine physicians. The location and relative uptake scores (graded 0 to 4) of normal and abnormal (18)F-FAZA biodistribution patterns, the calculated tumour-to-background (T/B) ratio, and the maximum standardized uptake value were recorded.Included in the study were 50 patients (32 men, 18 women). All seven patients with high-grade gliomas showed very high uptake of (18)F-FAZA in the primary tumour. In six out of nine patients with HNSCC, clear uptake of (18)F-FAZA was observed in the primary tumour and/or the lymph nodes in the neck. Of the 21 lymphoma patients (15 with non-Hodgkin's lymphoma and 6 with Hodgkin's disease), 3 demonstrated moderate lymphoma-related uptake. Of the 13 lung cancer patients (12 NSCLC, 1 SCLC), 7 had increased (18)F-FAZA uptake in the primary lung tumour. No side effects of the administration of (18)F-FAZA were observed.This study suggests that (18)F-FAZA may be a very useful radiopharmaceutical to image hypoxia in the tumour types selected. Especially the high uptake by gliomas was encouraging. Given the good imaging properties, including acceptable T/B ratios in the tumour categories studied, (18)F-FAZA could be considered as a very promising agent for assessing the hypoxic fraction of these tumour types. |
| Databáze: | OpenAIRE |
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