S. Okada

Publications237
h-index38
Citations4,655
Highly Influential Citations87
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The role of active arsenic species produced by metabolic reduction of dimethylarsinic acid in genotoxicity and tumorigenesis.
In recent research of arsenic carcinogenesis, many researchers have directed their attention to methylated metabolites of inorganic arsenics. Because of its high cytotoxicity and genotoxicity,… Expand
Manganese Transport in the Neural Circuit of Rat CNS
To study manganese (Mn) transport in the neural circuit of rat CNS, brain isotope distribution after 54Mn injection into the brain was analyzed by autoradiography. One day after 54MnCl2 injection… Expand
Induction of lung-specific DNA damage by metabolically methylated arsenics via the production of free radicals.
To clarify the genotoxicity of inorganic arsenics, we focused on the genotoxic effect of metabolically methylated arsenics in mammals. Oral administration to mice of dimethylarsinic acid (DMAA), a… Expand
DNA damage induced in cultured human alveolar (L-132) cells by exposure to dimethylarsinic acid.
Gene damage in cultured human alveolar (L-132) cells induced by exposure to dimethylarsinic acid (DMAA), a major metabolite of inorganic arsenics in mammals, was studied. DNA single-strand breaks and… Expand
In vivo stimulation-induced release of manganese in rat amygdala
The role of manganese ions in neural functions is poorly understood because of the low level of manganese in the brain. An excess of this ion is associated with neurological disorders such as… Expand
Dose-effect of inorganic tin on biochemical indices in rats.
The dose-effect of stannous chloride on biochemical indices was examined in weanling male rats given oral doses of 0.3, 1.0 and 2.0 mg/kg at 12-h intervals for 90 days. The 3.0 mg/kg dose caused… Expand
Cellular response to oxidative damage in lung induced by the administration of dimethylarsinic acid, a major metabolite of inorganic arsenics, in mice.
Oral administration of dimethylarsinic acid (DMAA), a major metabolite of inorganic arsenics, induces DNA damage in the mouse and rat lung due to both active oxygens and dimethylarsenic peroxyl… Expand
Oral exposure of dimethylarsinic acid, a main metabolite of inorganic arsenics, in mice leads to an increase in 8-Oxo-2'-deoxyguanosine level, specifically in the target organs for arsenic…
We have proposed that oral administration of dimethylarsinic acid (DMA), a metabolite of inorganic arsenics in mammals, rather than inorganic arsenics themselves, promotes lung and skin tumors by way… Expand
Dimethylarsinic acid, a main metabolite of inorganic arsenics, has tumorigenicity and progression effects in the pulmonary tumors of A/J mice.
The pulmonary tumorigenicity of dimethylarsinic acid (DMAA), a main metabolite of inorganic arsenics, was examined in A/J mice fed with drinking water containing DMAA for 25 and 50 weeks. Mice fed… Expand
Real-time analysis of liposomal trafficking in tumor-bearing mice by use of positron emission tomography.
Long-circulating liposomes are known to accumulate passively in tumor tissues of tumor-bearing animals. To evaluate the in vivo behavior of such liposomes, we investigated the real-time liposomal… Expand
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