Spectinomycin

Spectinomycin

Spectinomycin chemical structure

Spectinomycin is an antibiotic used primarily in the treatment of gonorrhea, a sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae. It is a member of the aminocyclitol class of antibiotics, which are structurally related to aminoglycosides. Unlike aminoglycosides, spectinomycin does not possess the characteristic amino sugars and glycosidic bonds.

Mechanism of Action

Spectinomycin functions by inhibiting bacterial protein synthesis. It binds to the 30S subunit of the bacterial ribosome, interfering with the translocation step in protein synthesis. This action is bacteriostatic, meaning it inhibits the growth and reproduction of bacteria rather than killing them directly.

Clinical Use

Spectinomycin is primarily used as an alternative treatment for gonorrhea, especially in cases where the patient is allergic to penicillin or when the causative strain of N. gonorrhoeae is resistant to other antibiotics. It is administered via intramuscular injection.

Pharmacokinetics

After intramuscular administration, spectinomycin is rapidly absorbed into the bloodstream. It is distributed throughout the body and is excreted primarily by the kidneys. The half-life of spectinomycin is approximately 1 to 2 hours in individuals with normal renal function.

Side Effects

Common side effects of spectinomycin include pain at the injection site, nausea, dizziness, and fever. Rarely, it may cause allergic reactions, including anaphylaxis.

Resistance

Resistance to spectinomycin can occur, although it is less common compared to other antibiotics used for gonorrhea. Resistance mechanisms include mutations in the ribosomal RNA that prevent spectinomycin from binding effectively.

History

Spectinomycin was first isolated in the 1960s from the bacterium Streptomyces spectabilis. It was developed as an antibiotic due to its unique mechanism of action and its effectiveness against certain bacterial infections.

Related Pages

• Antibiotic resistance
• Aminoglycoside
• Neisseria gonorrhoeae
• Protein synthesis inhibitor

Spectinomycin information leaflet