186Re radioimmunotherapy of small cell lung carcinoma xenografts in nude mice.
Cancer Res
; 51(2): 676-81, 1991 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-1845957
ABSTRACT
A 186Re-labeled monoclonal antibody (MAb), NR-LU-10, was used for the radioimmunotherapy of a subcutaneous human small cell lung carcinoma xenograft, SHT-1, in nude mice. Biodistribution with specific and irrelevant labeled MAb demonstrated peak tumor uptake of 8% and 3% of the injected dose/g at 2 days, respectively. Dosimetry analysis predicted tumorwhole-body radiation-absorbed dose ratios of 2.431 for NR-LU-10 and 0.621 for irrelevant MAb. Single-dose toxicity screening estimated a 50% lethal dose within 30 days of 600 microCi (880 cGy of whole-body radiation). As anticipated, a multiple-dose regimen of 490 microCi in four doses over 10 days (720 cGy of whole-body radiation, eight of eight surviving greater than 30 days) was less toxic than a single bolus dose of 430 microCi (644 cGy of whole-body radiation), six of eight surviving greater than 30 days). A multidose radioimmunotherapy regimen was initiated in nude mice bearing 66-mm3 tumors (total dose, 500 to 600 microCi). Complete remissions (greater than 140 days) were achieved in three of 16 mice, and the remainder showed a mean tumor growth delay of 53 days. Matched doses with irrelevant MAb produced one remission, one treatment-related death, and a mean growth delay of only 20 days in six of eight mice. Thus, in this nonoptimal radioimmunotherapy model, significant antitumor responses were observed using a mildly toxic multiple dosing regimen.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radioisótopos
/
Rênio
/
Carcinoma de Células Pequenas
/
Neoplasias Pulmonares
/
Anticorpos Monoclonais
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Female
/
Humans
Idioma:
En
Revista:
Cancer Res
Ano de publicação:
1991
Tipo de documento:
Article