Related Experiment Video

Updated: Sep 21, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
12:18

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)

Published on: February 9, 2011

[Immunomodulating action of antibiotics in health and in staphylococcal infection]

L E Siplivaia, L G Prokopenko, A I Lazarev

    Antibiotiki I Khimioterapiia = Antibiotics and Chemoterapy [Sic]
    |November 1, 1995
    PubMed

    Insights

    Antibiotics like benzylpenicillin, streptomycin, and gentamicin worsen Staphylococcus-induced immunosuppression in mice. However, gentamicin-treated red blood cells stimulated immune responses, suggesting a potential immunomodulatory role.

    Area of Science:

    • Immunology
    • Microbiology
    • Pharmacology

    Context:

    • Staphylococcus infections are a significant health concern, often leading to immunosuppression.
    • Antibiotics are crucial for treating bacterial infections, but their impact on the host immune system requires further investigation.
    • Red blood cells (RBCs) have emerged as potential modulators of immune responses.

    Purpose:

    • To investigate the immunomodulatory effects of benzylpenicillin, streptomycin, and gentamicin on Staphylococcus-infected mice.
    • To determine the influence of antibiotic-treated RBCs on immune responses, specifically to sheep red blood cells (SRBCs) and lipopolysaccharide (LPS) from Salmonella typhi.

    Summary:

    • In Staphylococcus-infected mice, benzylpenicillin, streptomycin, and gentamicin exacerbated immunosuppression, with benzylpenicillin showing the strongest effect.
    • Allogeneic transfer of RBCs from healthy and infected mice demonstrated immunosuppressive properties.
    • Syngeneic RBCs treated with antibiotics, particularly gentamicin, stimulated immune responses to SRBCs but not to LPS.

    Impact:

    • This study highlights the complex interplay between antibiotics, bacterial infections, and the host immune system.
    • Findings suggest that antibiotic-modified RBCs, especially those treated with gentamicin, could have potential therapeutic applications in modulating immune responses.
    • Further research into RBC-based immunomodulation may offer novel strategies for managing infectious diseases and immune dysregulation.

    More Related Videos

    A Mouse Model to Assess Innate Immune Response to Staphylococcus aureus Infection09:15

    A Mouse Model to Assess Innate Immune Response to Staphylococcus aureus Infection

    Published on: February 28, 2019

    Quantifying the Cytotoxicity of Staphylococcus aureus Against Human Polymorphonuclear Leukocytes12:27

    Quantifying the Cytotoxicity of Staphylococcus aureus Against Human Polymorphonuclear Leukocytes

    Published on: January 3, 2020

    Related Concept Videos

    Antimicrobial Proteins01:23

    Antimicrobial Proteins

    Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
    Interferons
    Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
    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...
    Microbiota Modulation by Antibiotics01:21

    Microbiota Modulation by Antibiotics

    Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...
    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...
    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...
    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...