Sodium aurothiomalate ( INN, known in the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

as gold sodium thiomalate) is a gold compound that is used for its immunosuppressive anti-rheumatic effects. Along with an orally-administered gold salt, auranofin, it is one of only two gold compounds currently employed in modern medicine.

Medical uses

It is primarily given once or twice weekly by intramuscular injection for moderate-severe

rheumatoid arthritis Rheumatoid arthritis (RA) is a long-term autoimmune disorder that primarily affects synovial joint, joints. It typically results in warm, swollen, and painful joints. Pain and stiffness often worsen following rest. Most commonly, the wrist and h ...

. It was also once used to treat

tuberculosis Tuberculosis (TB), also known colloquially as the "white death", or historically as consumption, is a contagious disease usually caused by ''Mycobacterium tuberculosis'' (MTB) bacteria. Tuberculosis generally affects the lungs, but it can al ...

, though later trials showed it to be harmful and ineffective for that purpose.

Adverse effects

Its most common side effects are digestive (mostly

dyspepsia Indigestion, also known as dyspepsia or upset stomach, is a condition of impaired digestion. Symptoms may include upper abdominal fullness, heartburn, nausea, belching, or upper abdominal pain. People may also experience feeling full earlier ...

, mouth swelling, nausea, vomiting and taste disturbance), vasomotor (mostly flushing, fainting, dizziness, sweating, weakness, palpitations,

shortness of breath Shortness of breath (SOB), known as dyspnea (in AmE) or dyspnoea (in BrE), is an uncomfortable feeling of not being able to breathe well enough. The American Thoracic Society defines it as "a subjective experience of breathing discomfort that con ...

and blurred vision) or dermatologic (usually itchiness, rash, local irritation near to the injection site and hair loss) in nature, although

conjunctivitis Conjunctivitis, also known as pink eye or Madras eye, is inflammation of the conjunctiva, the thin, clear layer that covers the white surface of the eye and the inner eyelid. It makes the eye appear pink or reddish. Pain, burning, scratchiness ...

, blood dyscrasias, kidney damage,

joint pain Arthralgia () literally means 'joint pain'. Specifically, arthralgia is a symptom of injury, infection, illness (in particular arthritis), or an allergic reaction to medication Medication (also called medicament, medicine, pharmaceutic ...

, muscle aches/pains and liver dysfunction are also common. Less commonly, it can cause

gastrointestinal bleeding Gastrointestinal bleeding (GI bleed), also called gastrointestinal hemorrhage (GIB), is all forms of bleeding in the gastrointestinal tract, from the mouth to the rectum. When there is significant blood loss over a short time, symptoms may includ ...

, dry mucous membranes and gingivitis. Rarely it can cause aplastic anaemia, ulcerative

enterocolitis Enterocolitis is an inflammation of the digestive tract, involving enteritis of the small intestine and colitis of the colon. It may be caused by various infections, with bacteria, viruses, fungi, parasites, or other causes. Common clinical mani ...

, difficulty swallowing, angiooedema,

pneumonitis Pneumonitis describes general inflammation of lung tissue. Possible causative agents include radiation therapy of the chest, exposure to medications used during chemo-therapy, the inhalation of debris (e.g., animal dander), aspiration, herbicide ...

, pulmonary fibrosis, hepatotoxicity, cholestatic jaundice,

peripheral neuropathy Peripheral neuropathy, often shortened to neuropathy, refers to damage or disease affecting the nerves. Damage to nerves may impair sensation, movement, gland function, and/or organ function depending on which nerve fibers are affected. Neuropa ...

Guillain–Barré syndrome Guillain–Barré syndrome (GBS) is a rapid-onset Paralysis, muscle weakness caused by the immune system damaging the peripheral nervous system. Typically, both sides of the body are involved, and the initial symptoms are changes in sensation ...

encephalopathy Encephalopathy (; ) means any disorder or disease of the brain, especially chronic degenerative conditions. In modern usage, encephalopathy does not refer to a single disease, but rather to a syndrome of overall brain dysfunction; this syndrome ...

encephalitis Encephalitis is inflammation of the Human brain, brain. The severity can be variable with symptoms including reduction or alteration in consciousness, aphasia, headache, fever, confusion, a stiff neck, and vomiting. Complications may include se ...

and

photosensitivity Photosensitivity is the amount to which an object reacts upon receiving photons, especially visible light. In medicine, the term is principally used for abnormal reactions of the skin, and two types are distinguished, photoallergy and phototoxicit ...

Pharmacology

Its precise mechanism of action is unknown but is known that it inhibits the synthesis of prostaglandins. It also modulates phagocytic cells and inhibits class II

major histocompatibility complex The major histocompatibility complex (MHC) is a large Locus (genetics), locus on vertebrate DNA containing a set of closely linked polymorphic genes that code for Cell (biology), cell surface proteins essential for the adaptive immune system. The ...

-peptide interactions. It is also known that it inhibits the following enzymes: *

Acid phosphatase Acid phosphatase (EC 3.1.3.2, systematic name ''phosphate-monoester phosphohydrolase (acid optimum)'') is an enzyme that frees attached phosphoryl groups from other molecules during digestion. It can be further classified as a phosphoric monoeste ...

* Beta-glucuronidase * Elastase * Cathepsin G *

Thrombin Prothrombin (coagulation factor II) is encoded in the human by the F2-gene. It is proteolytically cleaved during the clotting process by the prothrombinase enzyme complex to form thrombin. Thrombin (Factor IIa) (, fibrose, thrombase, throm ...

* Microsomal prostaglandin E synthase-1

History of use

Reports of favorable use of the compound were published in France in 1929 by Jacques Forestier. The use of gold salts was then a controversial treatment and was not immediately accepted by the international community. Success was found in the treatment of

Raoul Dufy Raoul Dufy (; 3 June 1877 – 23 March 1953) was a French painter associated with the Fauvist movement. He gained recognition for his vibrant and decorative style, which became popular in various forms, such as textile designs, and public build ...

's joint pain by the use of gold salts in 1940; "(the treatment) brought in a few weeks such a spectacular sense of healing, that Dufy ... boasted of again having the ability to catch a tram on the move." Along with aurothioglucose, sodium aurothiomalate was discontinued in the United States, leaving auranofin as the only gold salt remaining on the U.S. market.

References

{{DEFAULTSORT:Sodium Aurothiomalate Gold(I) compounds Antirheumatic products Metal-containing drugs Organic sodium salts Thiolates Gold–sulfur compounds French inventions Disease-modifying antirheumatic drugs