Related Experiment Video

Updated: Feb 7, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
12:18

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA

Published on: February 9, 2011

23.7K

EngineeredHouttuynia cordata-derived exosome-like nanoparticles as a dual-targeting platform for eradicating

Zhi Gong1, Ruixue Zhang1, Gongming Shi2

  • 1School of Pharmaceutical Sciences, Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Chongqing University, Chongqing 401331, China.

Colloids and Surfaces. B, Biointerfaces
|February 5, 2026
PubMed

Insights

A novel dual-targeting nanoparticle system effectively delivers rifampicin to combat intracellular methicillin-resistant Staphylococcus aureus (MRSA) infections. This approach overcomes antibiotic access barriers, showing promise for treating persistent bacterial reservoirs.

Area of Science:

  • Nanomedicine
  • Infectious Diseases
  • Microbiology

Background:

  • Intracellular infections caused by methicillin-resistant Staphylococcus aureus (MRSA) are difficult to treat due to limited antibiotic penetration into macrophage reservoirs.
  • Conventional therapies struggle to reach bacteria residing within host cells, leading to persistent infections.

Purpose of the Study:

  • To develop and evaluate a dual-targeting nanoparticle system for enhanced delivery of rifampicin to intracellular MRSA.
  • To overcome physiological barriers limiting conventional antibiotic efficacy against intracellular pathogens.

Main Methods:

  • Engineered Houttuynia cordata-derived exosome-like nanoparticles (HELNs) encapsulating rifampicin (Rif) and functionalized with mannose and vancomycin (Rif@HELNs-MV).
  • Investigated mannose receptor-mediated endocytosis for macrophage targeting and vancomycin-mediated binding to intracellular MRSA.
  • Characterized nanoparticle morphology, Rif loading capacity, cellular uptake, and antibacterial efficacy in murine infection models.

Main Results:

  • Rif@HELNs-MV nanoparticles exhibited spherical morphology and high rifampicin loading capacity (18.3 ± 2.1%).
  • Demonstrated enhanced cellular uptake and precise targeting of intracellular MRSA.
  • Showed superior antibacterial efficacy in murine peritonitis and muscle infection models, significantly reducing bacterial loads with good biocompatibility.

Conclusions:

  • The dual-targeting strategy using Rif@HELNs-MV effectively delivers antibiotics to intracellular MRSA reservoirs.
  • This nanomedicine approach shows significant potential for treating persistent intracellular bacterial infections by overcoming conventional therapeutic limitations.
Keywords:
AntibioticsDual-targeting deliveryHouttuynia cordata-derived exosome-like nanoparticlesIntracellular infection

More Related Videos

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus08:32

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus

Published on: January 17, 2025

1.3K
Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat07:46

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat

Published on: June 4, 2012

17.6K

Related Concept Videos

Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
53.6K
Overview of Exosomes01:36

Overview of Exosomes

Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
Stahl et al. discovered exosomes in 1983, but the exosomes were initially considered waste products released from the...
3.7K
What is Genetic Engineering?00:49

What is Genetic Engineering?

Overview
80.3K
Resistivity01:22

Resistivity

When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
4.6K
Resistance01:19

Resistance

When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
6.0K
Equivalent Resistance01:16

Equivalent Resistance

In circuit analysis, situations often arise where resistors are neither in series nor parallel configurations. To tackle such scenarios, three-terminal equivalent networks like the wye (Y) (Figure 1 (a)) or tee (T) and delta (Δ) (Figure 1 (b)) or pi (π) networks come into play. These networks offer versatile solutions and are frequently encountered in various applications, including three-phase electrical systems, electrical filters, and matching networks.
987