minocycline + ethylenediaminetetraacetic acid

A combination antimicrobial and anticoagulant lock solution used primarily to prevent catheter-related infections. This combination leverages the antibiotic properties of minocycline with the chelating and biofilm-disrupting capabilities of EDTA. **Composition and Mechanism of Action** M-EDTA combines two active components: 1. **Minocycline**: A tetracycline antibiotic that blocks bacterial protein synthesis by binding to the 30S ribosomal subunit, effective against both gram-positive and gram-negative bacteria. 2. **EDTA (Ethylenediaminetetraacetic acid)**: A potent calcium chelating agent that: - Disrupts bacterial and fungal cell membranes - Destroys biofilm formation and structure - Provides anticoagulant activity comparable to heparin. The combination works synergistically - EDTA disrupts the biofilm matrix by chelating calcium (an essential component of biofilm structure), allowing minocycline to penetrate and exert its antimicrobial effects against embedded microorganisms. **Efficacy** Clinical studies have demonstrated significant benefits: - No port infections occurred in patients using M-EDTA in a prospective cohort study of children with cancer, compared to 10 infections in control patients using heparin. - A randomized study showed infection incidence of 20.8% with M-EDTA versus 73.1% with heparin in pediatric cancer patients. - M-EDTA reduced catheter-related infection and colonization risk by ninefold in hemodialysis patients. **Antimicrobial Spectrum** Demonstrated activity against: - Methicillin-sensitive and methicillin-resistant staphylococci - Gram-negative bacteria including *Pseudomonas aeruginosa* and *Stenotrophomonas maltophilia* - *Candida* species, including drug-resistant strains. Effective against microorganisms embedded in biofilms. **Safety Profile** Appears to have a favorable safety profile with no reported thrombotic events or significant adverse events in clinical studies.

Other names

M-EDTAminocycline-EDTAminocycline-ethylenediaminetetraacetate