Research on Anti-Inflammatory Properties of Aquaphilus dolomiae
Background on Atopic Dermatitis
Researchers have discovered that extracts from the bacteria Aquaphilus dolomiae possess anti-inflammatory properties that could be beneficial in treating inflammation caused by Staphylococcus aureus (S. aureus) infections in the skin. Atopic dermatitis, commonly known as eczema, is a skin condition that predominantly affects young children. This disorder arises from impairments in the skin’s ability to create an anti-inflammatory environment and act as a protective barrier, rendering it vulnerable to bacterial infections such as S. aureus.
The Role of Resident Bacteria in Skin Health
In healthy skin, resident bacteria and skin cells—such as keratinocytes, dendritic cells (DC), and regulatory T-cells—collaborate to uphold the skin’s integrity. Typically, resident bacteria contribute to skin health by suppressing inflammation, primarily through the production of a molecule known as IL-10 by DC cells and regulatory T-cells.
Dysbiosis and Its Impact on Inflammation
When dysbiosis occurs, characterized by an imbalance of skin bacteria, an overgrowth of S. aureus can disrupt the anti-inflammatory effects of the skin’s resident bacteria, particularly Staphylococcus epidermidis (S. epidermidis). As S. aureus proliferates, it releases inflammatory molecules that lead to increased inflammation and the proliferation of CD4+ T cells, exacerbating the inflammatory response.
Counteracting Inflammatory Responses
Previous research has shown that the inflammatory effects triggered by S. aureus can be mitigated by enhancing IL-10 production in DC cells through exposure to protein extracts (secretomes) from S. epidermidis. This suggests that promoting IL-10 secretion by DC cells in response to bacterial proteins with anti-inflammatory properties may alleviate acute dermatitis.
Study Conducted by the University of Toulouse
Testing the Effects of Aquaphilus dolomiae Extracts
Researchers from the University of Toulouse developed a strategy to evaluate the anti-inflammatory effects of extracts from Aquaphilus dolomiae, a bacterium found in the Avene Spring water in France. In a study published in Pharmaceutical Biology, they found that exposure to protein extracted from A. dolomiae (ADE) led to the maturation of cultured DCs into IL-10-producing cells.
Impact on CD4+ T Cells
The study also revealed that when exposed to S. aureus extracts, the number of CD4+ T cells increased. However, in the presence of ADEs along with S. aureus extracts and cultured DCs, the count of CD4+ T cells decreased. This observation indicates that the stimulation of IL-10 production by DC exposure to ADE has anti-inflammatory effects.
Conclusions and Limitations
Overall, the researchers concluded that ADE exposure could potentially counteract the inflammatory effects of S. aureus in the skin. However, it is important to note that these findings are based solely on cell culture experiments. S. aureus may employ additional mechanisms to exert pro-inflammatory effects on the skin, including the activation of other pro-inflammatory cells. Nevertheless, this study reinforces the rationale for enhancing the activity of IL-10 producing dendritic cells to combat inflammation induced by S. aureus.
Further Reading and Related Topics
– Are short courses of antibiotics as effective as long courses for bacterial infections?
– Most effective way to prevent bacterial infections in hospitals identified.
– Global shortage of old antibiotics limits treatment options.
– Short-term oral antibiotics may work just as well as long-term treatments.
– Is zinc useful as a non-antibiotic UTI treatment?