Premium
Effectiveness of chelation therapy with time after acute vanadium intoxication
Author(s) -
Gómez M.,
Domingo J. L.,
Llobet J. M.,
Paternain J. L.
Publication year - 1988
Publication title -
journal of applied toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.784
H-Index - 87
eISSN - 1099-1263
pISSN - 0260-437X
DOI - 10.1002/jat.2550080609
Subject(s) - tiron , vanadium , antidote , chemistry , chelation , urine , excretion , chelation therapy , deferoxamine , pharmacology , ascorbic acid , sodium , toxicity , medicine , toxicology , biochemistry , inorganic chemistry , biology , food science , organic chemistry , enzyme , superoxide
The effect of increasing the time interval between vanadium exposure and chelation therapy was studied in male Swiss mice. The following chelating or reducing agents were administered i.p. at 0, 0.5, 2 and 8 h after i.p. administration of 0.16 mmol kg −1 sodium metavanadate: ascorbic acid, deferoxamine mesylate (DFOA) and 4,5‐dihydroxy‐1,3‐benzene‐disulphonic acid (Tiron). These agents were given at doses equal to one‐quarter of their respective LD 50 values. Daily elimination of vanadium into urine and faeces was determined for four days. The excretion of vanadium was especially rapid in the first 24 h. Treatment with Tiron increased significantly the urinary elimination of vanadium in all four groups during Day 1, whereas DFOA significantly increased the faecal excretion during the same period. Treatment with DFOA or Tiron resulted in a significant decrease in the concentration of vanadium in the kidney four days after sodium metavanadate administration. The magnitude of the increased elimination of vanadium, as well as the decreased tissue concentration of the metal, was remarkably attenuated by increasing the time interval between vanadium injection and administration of the chelators.