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Published on: March 28, 2017
Proteomic Changes in Methicillin-Resistant Staphylococcus aureus Exposed to Cannabinoids
Jan Struckmann Poulsen1, Christina Kjærager Nielsen1, Nina Ahrendt Pedersen1
1Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, DK-9220, Aalborg East, Denmark.
Abstract:
Methicillin-resistant Staphylococcus aureus (MRSA) is a major human pathogen that causes a wide range of infections. Its resistance to β-lactam antibiotics complicates treatment due to the limited number of antibiotics with activity against MRSA. To investigate development of alternative therapeutics, the mechanisms that mediate antibiotic resistance in MRSA need to be fully understood. In this study, MRSA cells were subjected to antibiotic stress from methicillin in combination with three cannabinoid compounds and analyzed using proteomics to assess the changes in physiology. Subjecting MRSA to nonlethal levels of methicillin resulted in an increased production of penicillin-binding protein 2 (PBP2). Exposure to cannabinoids showed antibiotic activity against MRSA, and differential proteomics revealed reduced levels of proteins involved in the energy production as well as PBP2 when used in combination with methicillin.
Insights
Cannabinoids show antibiotic activity against methicillin-resistant Staphylococcus aureus (MRSA). Combining cannabinoids with methicillin reduced key proteins like penicillin-binding protein 2 (PBP2), offering potential for new MRSA therapies.
Area of Science:
- Microbiology
- Pharmacology
- Proteomics
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant threat due to limited treatment options.
- Understanding MRSA's antibiotic resistance mechanisms is crucial for developing novel therapeutics.
Purpose of the Study:
- To investigate the physiological changes in MRSA when exposed to methicillin and cannabinoid compounds.
- To identify potential therapeutic targets for combating MRSA infections.
Main Methods:
- MRSA cells were treated with methicillin and three cannabinoid compounds.
- Proteomics analysis was employed to assess changes in protein expression.
- Differential proteomics identified key proteins affected by the treatments.
Main Results:
- Methicillin-induced stress increased penicillin-binding protein 2 (PBP2) production in MRSA.
- Cannabinoids demonstrated direct antibiotic activity against MRSA.
- Combined treatment with methicillin and cannabinoids reduced energy production proteins and PBP2 levels.
Conclusions:
- Cannabinoids exhibit promising antibiotic properties against MRSA.
- The combination of cannabinoids and methicillin alters MRSA physiology by reducing PBP2 and energy production.
- These findings suggest cannabinoids as potential candidates for novel MRSA treatment strategies.
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