Detection of residual tissue after thyroidectomy for papillary or follicular thyroid carcinoma may be performed using diagnostic imaging with either 123I or 131I. The former is often preferred to avoid ‘‘stunning’’—defined as a reduction in uptake of the therapeutic dose of 131I caused by some form of cell damage from the diagnostic dosage of the radionuclide. Stunning could potentially reduce ...

INTRODUCTION The aim of this study was to investigate the effects of 131I gelatin microspheres (131I-GMS) on human breast cancer cells (MCF-7) in nude mice and the biodistribution of 131I-GMSs following intratumoral injections. METHODS A total of 20 tumor-bearing mice were divided into a treatment group and control group and received intratumoral injections of 2.5 mci 131I-GMSs and nonradioac...

Iodine-131 (131I) is widely used for the treatment of thyroid-related diseases. This study aimed to investigate the expression of p53 and BTG2 genes following 131I therapy in thyroid cancer cell line SW579 and the possible underlying mechanism. SW579 human thyroid squamous carcinoma cells were cultured and treated with 131I. They were then assessed for 131I uptake, cell viability, apoptosis, ce...

PURPOSE Humanized monoclonal antibody A33 (huA33) targets the A33 antigen which is expressed on 95% of colorectal cancers. A previous study has shown excellent tumor-targeting of iodine-131 labeled huA33 (131I-huA33). Therefore, we did a phase I dose escalation trial of 131I-huA33 radioimmunotherapy. EXPERIMENTAL DESIGNS Fifteen patients with pretreated metastatic colorectal carcinoma each re...

The effects of the restriction of food and water intakes on gastrointestinal absorption, distribution to organs and excretion of 131I were investigated in C3H/He mice. The animals were divided into four groups and administered orally 37 kBq carrier-free Na 131I in 0.25 ml normal saline. One group of animals was given food and water ad libitum throughout the experimental period. Food and water t...

B7-H3 is a tumor-associated antigen that plays a critical role in potential tumor-targeted therapy. In this study, we aimed to assess the radiobiological effect of 131I-labeled B7-H3 monoclonal antibody (131I-4H7) in nude mice with human renal cell carcinoma (RCC) and evaluate the effect of 131I-4H7 on RCC treatment. The radiobiological activity and tumor uptake of 131I-4H7, and its effect on t...

Five patients treated with intraperitoneal 131I-labeled mouse monoclonal antibody for ovarian cancer also received i.v. exogenous polyclonal human anti-murine immunoglobulin antibody. The pharmacokinetics of 131I-labeled monoclonal antibody in these patients were compared with those of 28 other patients receiving i.p.-radiolabeled monoclonal antibody for the first time without exogenous human a...

The murine B-cell lymphoma 38C13 model was used to study the radiobiological effect of 131I-monoclonal antibody (MAB) therapy compared with dose equivalent external beam irradiation. Continuous exponentially decreasing low dose rate (LDR) gamma-irradiation, and multiply fractionated (MF) X-irradiation were compared with dose equivalent 131I-MAB. The relative therapeutic efficacy of radioimmunot...

INTRODUCTION Radioiodine (131I) therapy is widely accepted as an essential part of therapeutic regimens in many cases of differentiated thyroid cancer. Radiation-induced oxidative damage to macromolecules is a well known phenomenon. Frequently examined process to evaluate oxidative damage to macromolecules is lipid peroxidation (LPO), resulting from oxidative damage to membrane lipids. The aim ...