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Published on: December 27, 2016
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Host Responses to Biofilm.
C Watters1, D Fleming2, D Bishop1
1Wound Infections Department, Naval Medical Research Center, Silver Spring, MD, United States.
Progress in Molecular Biology and Translational Science
|August 31, 2016
Summary
Bacterial biofilms, communities of microbes, can evade immune detection by hiding within an extracellular matrix. Probiotic biofilms, however, show anti-inflammatory properties and protect host tissues.
Area of Science:
- Microbiology
- Immunology
- Biochemistry
Background:
- The human immune system constantly interacts with bacteria.
- Biofilms, microbial communities in an extracellular polymeric substance (EPS) matrix, are involved in both health and disease.
- Bacterial components can be masked within biofilms, altering immune recognition.
Purpose of the Study:
- To explore how bacterial biofilms interact with the host immune system.
- To understand the role of the EPS matrix in immune evasion.
- To investigate the differential immune responses to pathogenic versus probiotic biofilms.
Main Methods:
- Analysis of immune cell interactions with biofilm components.
- Investigation of molecular signaling during biofilm formation.
- Comparison of immune responses to planktonic bacteria versus biofilm communities.
Main Results:
- Biofilm growth can camouflage bacterial antigens, hindering immune cell recognition.
- The EPS matrix, composed of DNA, proteins, polysaccharides, and lipids, is a key interface with the immune system.
- Pathogenic biofilms can enhance their formation and resist immune cells like neutrophils and macrophages.
- Probiotic Lactobacillus biofilms elicit minimal immune response and possess anti-inflammatory properties.
Conclusions:
- Bacterial biofilms present unique challenges to host immunity.
- The EPS matrix plays a critical role in biofilm survival and immune modulation.
- Probiotic biofilms offer potential therapeutic benefits due to their anti-inflammatory effects and protective colonization.
