Abstract
A subacute toxicity study on 99m Tc stannous glucoheptonate was performed with rats, dogs and rabbits, injected intravenously at ten to 100 times the human dose on a body weight basis. There were no abnormalities in the clinical status of any of the animals. No changes were found in urinalysis, blood chemistry or hematology in the rabbit nor in gross examination, renal histology or bone marrow smears in the rats and rabbits. Hepatic histology was also done. A focal area of necrosis in a liver of one rabbit that had been injected with 100 times the human dose was observed using light microscopy. Examination by electron microscopy in another group of rats and rabbits was prompted by the observation of that lesion. This revealed vacuolated and dilated smooth endoplasmic reticulum and degranulated and vesiculated rough endoplasmic reticulum in all the test livers. X-ray microanalysis indicates that the ultrastructural changes are linked to the deposition of tin.
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