M01CB01 - Sodium Aurothiomalate |
Propably not porphyrinogenic |
PNP |
Rationale
Sodium aurothiomalate is most probably not an inhibitor or inducer of CYP enzymes.
Therapeutic characteristics
Aurothiomalate is used in the management of active progressive rheumatoid arthritis and progressive juvenile chronic arthritis especially if polyarticular or seropositive.
Metabolism and pharmakokinetics
In vitro data indicates that polymorphonuclear leukocytes (PMN) metabolise thiocyanate to cyanide, which in turn converts aurothiomalate to aurocyanide (dicyanogold(I)) which inhibits the functions of PMN and other cells (Graham 1994).
Aurothiomalate is mainly excreted in the urine with smaller amounts in the faeces (SPC). Half-life elimination is initially around 5-6 days and then 10-35 days (Legemiddelhåndboka), but after a course of treatment, gold may be found in the urine for up to a year or more owing to its presence in the deep body compartments (SPC).
In a study 24-hour urinary ALA and PBG were measured prior to and ten weeks after the beginning of gold injections. These in vivo data may indicate that aurothiomalate does not affect hem metabolism (Herrick 1999).
No drug-drug interactions with sodium aurothiomalate as a perpetrator are observed (Interaksjoner and Interaktionsdatabasen), which may indicate that sodium aurothiomalate is not an inhibitor or inducer of CYP enzymes.
Published experience
Aurothiomalate is listed to have been associated with acute attacks of porphyria (Moore 1997).
References
- Scientific articles
- Graham GG, Champion GD, Ziegler JB. The cellular metabolism and effects of gold complexes. Met Based Drugs. 1994;1(5-6):395-404. PMID 18476258. #2388
- Herrick AL, Hodgkiss R, et al. No significant effects of sodium aurothiomalate on haem metabolism and mixed function oxygenase activity in patients with rheumatoid arthritis. Clin Exp Rheumatol. 1999 Jul-Aug;17(4):461-2. PMID 10464558. #4625
- Moore MR, Hift RJ. Drugs in the acute porphyrias--toxicogenetic diseases. Cell Mol Biol (Noisy-le-grand). 1997 Feb;43(1):89-94. PMID 9074793. #1110
- Drug interaction databases
- Interaksjoner. Sodium aurothiomalate #2386
- Interaktionsdatabasen. Sodium aurothiomalate #2387
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