BACKGROUND This study was designed to explore the feasibility of replacing the conventional peri-/intratumoural ultrasound (US)-guided technetium-99m albumin nanocolloid ((99m)Tc-nanocolloid) administration by an injection of the same tracer guided by a freehand single-photon emission computed tomography (SPECT) device in patients with non-palpable breast cancer with an iodine-125 ((125)I) seed...

UNLABELLED We have previously shown that, in vitro, monoclonal antibodies (mAbs) labeled with the Auger electron emitter (125)I are more cytotoxic if they remain at the cell surface and do not internalize in the cytoplasm. Here, we assessed the in vivo biologic efficiency of internalizing and noninternalizing (125)I-labeled mAbs for the treatment of small solid tumors. METHODS Swiss nude mice...

Purpose: In the current study, we aimed to look into macroscopic and microscopic dose enhancement effect of metallic nanoparticles in interstitial brachytherapy gastric adenocarcinoma by Iodine-125 source using a nano-lattice model MCNPX (2.7) MCNP6.1 codes. Materials methods: Based on simulation containing radiation tumor tissue with cellular compartments loaded 7 mg/g spherical nanoparticles,...

The 125th anniversary of the birth of the Indian mathematical genius Srinivasa Ramanujan falls on December 22, 2012. To mark this occasion, the Notices offers the following feature article, which appears in two installments. The article contains an introductory piece describing various major developments in the world of Ramanujan since his centennial in 1987, followed by seven pieces describing...

PURPOSE The Collaborative Ocular Melanoma Study (COMS) established iodine-125 (I-125) plaque brachytherapy for eye preserving treatment of medium-sized choroidal melanomas in the United States. Eye Physics I-125 plaque treatment modeled with Plaque Simulator (PS) software yields similar results to COMS. Herein, we report results from a series of 15 patients treated with ruthenium-106 (Ru-106) p...

With [(125)I]insulin at 7 x 10(-10) M, 25% of the radioactivity was bound to plasma membranes purified from rat liver. 20% of the [(125)I]insulin binding was inhibited by unlabeled insulin at 10(-9) M (6 ng/ml), equivalent to insulin concentrations in hepatic portal blood; inhibition of [(125)I]insulin binding was 80% at 10(-7) M and 90% at 10(-5) M. Eight insulins and derivatives with biologic...

Triiodothyronine and thyroxine induce a 3-fold increase in the rate of growth of GH(1) cells in culture. To study further the action of these hormones, we examined the binding of [(125)I]triiodothyronine and purified [(125)I]thyroxine to cellular fractions after incubation with intact cells in serum-free medium. High-affinity, low-capacity binding sites for the hormones were demonstrated in nuc...

In multiple myeloma, the presence of highly resistant cancer stem cells (CSC) that are responsible for tumor metastasis and relapse has been proven. Evidently, for achieving complete response, new therapeutic paradigms that effectively eradicate both, CSCs and bulk cancer populations, need to be developed. For achieving that goal, an innovative two-step treatment combining targeting of thymidin...

A new method is described for the detection of variations in the release rate of all iodinated products by the thyroid gland in man. (125)I was employed to endogenously label the thyroid gland, and a parenterally administered (131)I thyroxine dose was used to generate a (131)I reference source. Thyroidal iodine release activity was quantitatively assessed by the measurement of variations in (12...

Studies of the rate of extrathyroidal conversion of thyroxine (T4) to 3,5,3'-triiodo-L-thyronine (T3) were carried out in rats. Total body homogenates were prepared and extracted with ethanol 48, 72, and 96 hr after the intravenous injection of (125)I-T4. (131)I-T3 was added, and the paper chromatographic purification of T3 was effected by serial elution and rechromatography in three paper and ...