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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

FD&C Red No. 105 (Rose Bengal B) neutralizes the thyroid tumor promoting effect of iodine-deficient diet in rats.

The effect of 3,4,5,6-tetrachloro-2',4',5',7'-tetraiodo-fluorescein sodium salt (Rose Bengal B or FD&C Red No. 105, molecular weight 1017.6) on the thyroid of rats treated with N-bis(2-hydroxypropyl)-nitrosamine (DHPN) and iodine-deficient (I-def) diet is studied. Six-week-old male F344 rats were divided into seven groups (20 each) and given a single subcutaneous injection of DHPN (2800 mg/kg body wt.). From week 2 to 20, I-def diet was given in combination with either FR105 (1.25, 5.0, or 20 mg/l) or potassium iodide (KI, 12.5, 50.0 or 200 micrograms/l) in drinking water. As a result, an amount of 1.25 mg/l of FR105 was slightly more effective than 200 micrograms/l of KI in terms of inhibition of the effect of I-def diet on thyroid weight, morphology, thyroid-related hormones and thyroid tumor development. It was calculated that 1 mumol/l of FR105 was slightly more potent than 1 mumol/l of iodide ion. As each FR105 molecule has four iodide residues, at least 25% of total iodide residues were calculated to be utilized by the rats given I-def diet.[1]

References

  1. FD&C Red No. 105 (Rose Bengal B) neutralizes the thyroid tumor promoting effect of iodine-deficient diet in rats. Kanno, J., Goda, Y., Sato, K., Yoshihira, K., Hayashi, Y. Toxicology (1995) [Pubmed]
 
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