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Fasciola hepatica Excretory-Secretory Products (Fh-ES) Either Do Not Affect miRNA Expression Profile in THP-1
Piotr Bąska1, Alicja Majewska2, Wojciech Zygner3
1Division of Pharmacology and Toxicology, Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, 02-786 Warsaw, Poland.
Abstract:
Fasciola hepatica is a liver fluke that resides in the bile ducts of various mammals. The parasitosis leads to economic losses in animal production estimated at USD 3.2 billion annually. It is also considered a zoonosis of great significance and a problem for public health affecting 2.4 million people worldwide. Nevertheless, besides the negative aspects of infestation, the antigens released by the fluke, F. hepatica Excretory-Secretory Products (Fh-ES) contain several immunomodulatory molecules that may be beneficial during the course of type I diabetes, multiple sclerosis, ulcerative colitis, or septic shock. This phenomenon is based on the natural abilities of adult F. hepatica to suppress proinflammatory responses. To underline the molecular basis of these mechanisms and determine the role of microRNA (miRNA) in the process, lipopolysaccharide (LPS)-activated THP-1 macrophages were stimulated with Fh-ES, followed by miRNA microarray analyses. Surprisingly, no results indicating changes in the miRNA expression profile were noted (p < 0.05). We discuss potential reasons for these results, which may be due to insufficient sensitivity to detect slight changes in miRNA expression or the possibility that these changes are not regulated by miRNA. Despite the negative data, this work may contribute to the future planning of experiments by other researchers.
Insights
Fasciola hepatica excretory-secretory products (Fh-ES) were tested for their ability to modulate microRNA (miRNA) in macrophages. The study found no significant changes in miRNA expression, suggesting alternative regulatory mechanisms may be involved.
Area of Science:
- Parasitology
- Immunology
- Molecular Biology
Background:
- Fasciola hepatica causes significant economic losses and public health issues globally.
- F. hepatica excretory-secretory products (Fh-ES) possess immunomodulatory properties, potentially beneficial for autoimmune diseases.
- The role of microRNAs (miRNAs) in Fh-ES-mediated immune suppression is not well understood.
Purpose of the Study:
- To investigate the molecular mechanisms underlying the immunomodulatory effects of Fh-ES.
- To determine if Fh-ES influences miRNA expression profiles in macrophages.
Main Methods:
- Lipopolysaccharide (LPS)-activated THP-1 macrophages were used as a model system.
- Macrophages were stimulated with Fh-ES.
- miRNA expression profiling was performed using microarray analysis.
Main Results:
- No statistically significant changes in miRNA expression were observed in macrophages stimulated with Fh-ES (p < 0.05).
- The results indicate that miRNA regulation may not be the primary mechanism for Fh-ES-mediated immune modulation in this context.
Conclusions:
- This study did not identify changes in miRNA expression in response to Fh-ES.
- Potential explanations include limitations in assay sensitivity or that miRNA is not involved in this specific immunomodulatory process.
- Further research is needed to elucidate the precise molecular pathways of Fh-ES immune modulation.
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