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Fungal Dysbiosis in Children with Celiac Disease
Mohammad El Mouzan1, Abdulrahman Al-Hussaini2, Brian Fanelli3
1Department of Pediatrics (Gastroenterology), King Saud University, P O Box 2925, Riyadh, 11461, Saudi Arabia. melmouzan@ksu.edu.sa.
Background:
Although intestinal fungi are known to interact with the immune system, the relationship between intestinal fungi and childhood celiac disease (CeD), an immune-mediated condition, has rarely been reported.
Aims:
The aim of this study was to describe gut fungal profiles in a cohort of children with new-onset CeD.
Methods:
Mucosal and fecal samples were collected from children with CeD and controls and subjected to metagenomics analysis of fungal microbiota communities. DNA libraries were sequenced using Illumina HiSeq platform 2 × 150 bp. Bioinformatic analysis was performed to quantify the relative abundance of fungi. Shannon alpha diversity metrics and beta diversity principal coordinate (PCo) analyses were calculated, and DESeq tests were performed between celiac and non-celiac groups.
Results:
Overall more abundant taxa in samples of children with CeD included Tricholomataceae, Saccharomycetaceae, Saccharomycetes Saccharomyces cerevisiae, and Candida, whereas less abundant taxa included Pichiaceae, Pichia kudriavzevii, Pneumocystis, and Pneumocystis jirovecii. Alpha diversity between CeD and control individuals did not differ significantly, and beta diversity PCo analysis showed overlap of samples from CeD and controls for both fecal or mucosal samples; however, there was a clear separation between mucosal and fecal overall samples CONCLUSIONS: We report fungal dysbiosis in children with CeD, suggesting a possible role in the pathogenesis of CeD. Further larger, controlled, prospective and longitudinal studies are needed to verify the results of this study and clarify the functional role of fungi in CeD.
Insights
Children with new-onset celiac disease (CeD) show altered gut fungi, indicating potential fungal dysbiosis. This suggests fungi may play a role in the development of CeD in children.
Area of Science:
- Gastroenterology
- Immunology
- Microbiome Research
Background:
- Intestinal fungi interact with the immune system.
- The link between gut fungi and childhood celiac disease (CeD) is understudied.
- CeD is an immune-mediated condition affecting the small intestine.
Purpose of the Study:
- To characterize the gut fungal microbiota in children with newly diagnosed CeD.
- To compare fungal profiles between children with CeD and healthy controls.
Main Methods:
- Metagenomics analysis of mucosal and fecal samples from children with CeD and controls.
- Illumina HiSeq sequencing for fungal microbiota community analysis.
- Bioinformatic analysis including diversity metrics (Shannon, PCoA) and differential abundance testing (DESeq).
Main Results:
- Fungal dysbiosis observed in children with CeD.
- Increased abundance of taxa such as Tricholomataceae, Saccharomyces cerevisiae, and Candida in CeD patients.
- Decreased abundance of Pichia kudriavzevii and Pneumocystis jirovecii in CeD patients.
- No significant difference in alpha diversity; distinct separation between mucosal and fecal fungal communities.
Conclusions:
- Gut fungal dysbiosis is associated with new-onset childhood celiac disease.
- Fungi may contribute to the pathogenesis of CeD.
- Further longitudinal studies are required to confirm these findings and elucidate the functional role of fungi in CeD.
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