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[Mechanisms of inactivation of aminosides. Relationship to phenotype in Gram negative bacilli]
Abstract:
Aminosides are antibiotics essential in the treatment of gram negative bacilli infections. Phenomena of resistance related to them are amongst the best documented. For enterobacteria encountered in clinical practice, the process is usually a plasmid mediated inactivation mechanism, the dispersion of which in a hospital context may be appreciated. Precise knowledge of the modes of inactivation and the molecular sites involved has led to the production of semi-synthetic aminosides which escape the action of these enzymes. A classification of hospital bacteria according to their type of resistance is possible by virtue of the study of phenotypes and may make it possible to define the true need of these new substances.
Insights
Aminoside antibiotics are crucial for treating gram-negative infections. Understanding resistance mechanisms, like plasmid-mediated inactivation, aids in developing new semi-synthetic aminosides to combat resistant bacteria.
Area of Science:
- Microbiology
- Pharmacology
- Infectious Diseases
Context:
- Aminoside antibiotics are vital for treating Gram-negative bacterial infections.
- Resistance to aminosides, particularly in enterobacteria, is well-documented and often plasmid-mediated.
- The spread of resistance in hospital settings is a significant concern.
Purpose:
- To review the mechanisms of aminoside resistance in Gram-negative bacteria.
- To discuss the development of semi-synthetic aminosides designed to overcome specific resistance enzymes.
- To explore the classification of bacterial resistance phenotypes for targeted therapeutic strategies.
Summary:
- Aminoside resistance in Gram-negative bacilli is frequently due to plasmid-mediated enzymatic inactivation.
- Knowledge of these inactivation mechanisms and molecular targets has facilitated the creation of novel semi-synthetic aminosides.
- These new agents are engineered to evade common bacterial resistance enzymes.
Impact:
- Enables classification of hospital-acquired bacteria based on resistance profiles.
- Informs the clinical need for and strategic deployment of new semi-synthetic aminosides.
- Contributes to antimicrobial stewardship by guiding the use of effective treatments against resistant pathogens.