Targeted immunotherapy for staphylococcal infections : focus on anti-MSCRAMM antibodies

Michael Otto1

  • 1Laboratory of Human Bacterial Pathogenesis, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, The National Institutes of Health, Hamilton, Montana 59840, USA. motto@niaid.nih.gov

Insights

Developing effective staphylococcal vaccines is crucial due to rising infections and antibiotic resistance. Novel combinatory vaccines targeting surface proteins show promise for combating these challenging bacterial diseases.

Area of Science:

  • Microbiology
  • Immunology
  • Vaccinology

Background:

  • Staphylococcal infections pose a significant global public health burden.
  • Emergence of highly virulent strains and increasing antibiotic resistance necessitate new prevention strategies.
  • Staphylococcus aureus, a key species, evades host defenses via Protein A and its commensal nature complicates immunity.

Purpose of the Study:

  • To re-evaluate vaccine development for staphylococcal diseases.
  • To explore novel approaches for creating effective staphylococcal vaccines.
  • To identify promising vaccine targets on the staphylococcal cell surface.

Main Methods:

  • Reviewing challenges in staphylococcal vaccine development.
  • Investigating novel vaccine strategies, including combinatory approaches.
  • Analyzing microbial surface components recognizing adhesive matrix molecules (MSCRAMMs) as potential targets.
  • Considering polysaccharide and other nonprotein antigens for vaccine development.

Main Results:

  • Traditional vaccine approaches have faced setbacks, with notable clinical trial failures.
  • Novel combinatory vaccines targeting MSCRAMMs have shown promising preliminary results.
  • Staphylococcal surface components, including polysaccharides, are identified as potential vaccine targets.

Conclusions:

  • Effective staphylococcal vaccines are urgently needed due to public health threats.
  • Combinatory vaccines targeting MSCRAMMs represent a promising avenue for future development.
  • Further research into diverse staphylococcal antigens is essential for successful vaccine design.

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...
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...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Antibody Actions01:26

Antibody Actions

Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...