Novel targets for antibiotics in Staphylococcus aureus

Knut Ohlsen1, Udo Lorenz

  • 1University of Würzburg, Institute for Molecular Infection Biology, Röntgenring 11, 97070 Würzburg, Germany. knut.ohlsen@mail.uni-wuerzburg.de

Future Microbiology
|November 29, 2007
PubMed

Insights

Antibiotic resistance in Staphylococcus bacteria, including methicillin-resistant Staphylococcus aureus (MRSA), is a growing threat. New antibacterial targets and immunization strategies are crucial for future treatment of these serious infections.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pharmacology

Background:

  • Multiple resistant staphylococci are a leading cause of nosocomial infections, associated with significant morbidity and mortality.
  • Methicillin-resistant Staphylococcus aureus (MRSA) strains are increasingly prevalent in both hospital and community settings, infecting diverse populations.
  • The rise of resistant strains necessitates the urgent development of novel therapeutic strategies.

Purpose of the Study:

  • To highlight the urgent need for new antibacterial targets and lead compounds against resistant staphylococci.
  • To explore promising targets for novel antibacterials, focusing on essential gene products.
  • To review the development of active and passive immunization strategies against staphylococcal surface components.

Main Methods:

  • Literature review of current research on staphylococcal infections and resistance mechanisms.
  • Identification of essential gene products as potential antibacterial targets.
  • Analysis of immunization strategies targeting surface components like adhesins, teichoic acids, and antigens.

Main Results:

  • Resistant staphylococci, including MRSA, pose a significant global health challenge.
  • Essential bacterial gene products represent promising targets for novel antibacterial drug development.
  • Immunization approaches targeting staphylococcal surface structures are under active investigation.

Conclusions:

  • The development of new antibacterials and vaccines is critical to combatting staphylococcal infections.
  • Targeting essential cellular functions and surface antigens offers viable pathways for future therapies.
  • Continued research is vital to overcome the threat of antibiotic resistance in staphylococci.

Related Concept Videos

Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Inhibitors of Bacterial Protein Synthesis01:25

Inhibitors of Bacterial Protein Synthesis

Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
Inhibitors of Gram-positive Cell Wall Synthesis01:23

Inhibitors of Gram-positive Cell Wall Synthesis

Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...