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Stranica 1 iz 16 rezultatima
Adverse reproductive and developmental effects in Xenopus from insufficient boron.
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Frog embryo teratogenesis assay--Xenopus (FETAX) was utilized as a model system to evaluate the effects on embryo-larval development at various low boron (B) exposure levels in the culture media. Concentrations tested ranged from < 1 to 5000 microg B/L. A statistically significant (P < 0.05)
Ultrastructural microvascular response to boron neutron capture therapy in an experimental model.
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A CD 344 rat glioma model currently used to investigate boron neutron capture therapy (BNCT) was used to demonstrate an increased survival rate after thermal neutron irradiation enhanced by administration of 10B-enriched polyhedral borane, Na2B12H11SH. To investigate the possible effects of BNCT on
Protective Effects of Boron on Cyclophosphamide-Induced Bladder Damage and Oxidative Stress in Rats.
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This study aims to investigate protective effects of boron against cyclophosphamide-induced bladder toxicity that produces oxidative stress and leads to apoptosis of the cells. In total, 24 rats were divided into 4 equal groups. The control group received saline. The 2nd experimental group received
Boron neutron capture therapy of a murine melanoma with p-boronophenylalanine: dose-response analysis using a morbidity index.
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Boron-10 concentrations of 20 or 40 micrograms/g were attained in mouse B16 melanomas following one or two intragastric doses of p-boronophenylalanine (750 mg/kg body weight per dose), respectively. Tumor-to-normal-tissue (blood, muscle) boron concentration ratios were 4:1-6:1. The efficacy of boron
The anti-inflammatory activity of boron derivatives in rodents.
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Acyclic amine-carboxyboranes were effective anti-inflammatory agents in mice at 8 mg/kg x 2. These amine-carboxyboranes were more effective than the standard indomethacin at 8 mg/kg x 2, pentoxifylline at 50 mg/kg x 2, and phenylbutazone at 50 mg/kg x 2. The heterocyclic amine derivatives as well as
Boron neutron capture therapy for malignant tumors related to meningiomas.
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OBJECTIVE
Malignant meningiomas, similar to glioblastomas, are difficult tumors to control. We tried to control malignant tumors related to meningiomas by boron neutron capture therapy (BNCT).
METHODS
Since June 2005, we applied BNCT with 13 rounds of neutron irradiation to seven cases of malignant
Boron Neutron Capture Therapy Combined with Early Successive Bevacizumab Treatments for Recurrent Malignant Gliomas - A Pilot Study.
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Recurrent malignant gliomas (RMGs) are difficult to control, and no standard protocol has been established for their treatment. At our institute, we have often treated RMGs by tumor-selective particle radiation called boron neutron capture therapy (BNCT). However, despite the cell-selectivity of
Early effects of boron neutron capture therapy on rat glioma models.
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Early effects of boron neutron capture therapy (BNCT) on malignant glioma are characterized by reduction of the enhancement area and regression of the peritumoral edema radiologically. The aim of this study was to investigate the early histological changes of tumors and inflammatory cells after BNCT
Fractionated Boron Neutron Capture Therapy in Locally Recurrent Head and Neck Cancer: A Prospective Phase I/II Trial.
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OBJECTIVE
To investigate the efficacy and safety of fractionated boron neutron capture therapy (BNCT) for recurrent head and neck (H&N) cancer after photon radiation therapy.
METHODS
In this prospective phase 1/2 trial, 2-fraction BNCT with intravenous L-boronophenylalanine (L-BPA, 400 mg/kg) was
Current practices and future directions of therapeutic strategy in glioblastoma: survival benefit and indication of BNCT.
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Since 1998, we are performing clinical studies on treatment of GBM using conventional fractionated photon radiation therapy (CRT), proton beam therapy (PBT) or boron neutron capture therapy (BNCT). We investigated whether these radiation modalities improves the survival of patients with GBM.
Acute inhalation toxicology of oxalyl chloride.
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The acute inhalation LC50 of oxalyl chloride was determined in rats following a one-hour exposure. Four groups of 10 animals per group were exposed to a concentration range of 462-2233 ppm. One set of six animals was exposed to a concentration of oxalyl chloride of 1232 ppm for one hour to evaluate
The effect of dexamethasone on the uptake of p-boronophenylalanine in the rat brain and intracranial 9L gliosarcoma.
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The steroid dexamethasone sodium phosphate (DEX) is routinely used to treat edema in brain tumor patients. The objective of the present study was to evaluate the effects of DEX on the uptake of boronophenylalanine (BPA) using the rat 9L gliosarcoma tumor model and surrounding brain tissue. Two
Partial deuteration and blood-brain barrier (BBB) permeability.
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Boron neutron capture therapy (BNCT) is one method of radio-surgery used for malignant brain tumor. The theory of this method is based on the nuclear reaction that occurs when boron-10 is radiated with and absorbs neutrons. When treating deep-seated brain tumor, partial deuteration of body water is
Repeated treatments with bevacizumab for recurrent radiation necrosis in patients with malignant brain tumors: a report of 2 cases.
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Bevacizumab is expected to constitute a new treatment modality for radiation necrosis. In the present cases, we observed a recurrence of radiation necrosis after temporary improvement by bevacizumab treatment. Re-treatment with bevacizumab controlled the necrosis again. A 39-year-old male and a
Neutron capture therapy of the 9L rat gliosarcoma using the p-boronophenylalanine-fructose complex.
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OBJECTIVE
Intraperitoneal (IP) injection of the solubilized fructose complex of L-p-boronophenylalanine (BPA-F) produced higher boron concentrations in a rat brain tumor model than was possible using intragastric (IG) administration of L-p-boronophenylalanine (BPA). The effectiveness of IP BPA-F was
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