Gut Microbiota-Mediated Degradation of Food-Grade Lambda-Carrageenan by Bacteroides xylanisolvens and Its Role in Inflammation
Issued Date
2025-01-01
Resource Type
ISSN
00218561
eISSN
15205118
Scopus ID
2-s2.0-85217223169
Journal Title
Journal of Agricultural and Food Chemistry
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SCOPUS
Bibliographic Citation
Journal of Agricultural and Food Chemistry (2025)
Suggested Citation
Han Y., Guo X., Thanuphol P., Ji R., Zhu Z., Wu Y., Du H., Xiao H. Gut Microbiota-Mediated Degradation of Food-Grade Lambda-Carrageenan by Bacteroides xylanisolvens and Its Role in Inflammation. Journal of Agricultural and Food Chemistry (2025). doi:10.1021/acs.jafc.4c10159 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/105301
Title
Gut Microbiota-Mediated Degradation of Food-Grade Lambda-Carrageenan by Bacteroides xylanisolvens and Its Role in Inflammation
Author's Affiliation
Corresponding Author(s)
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Abstract
Concerns about the safety of food additives have intensified among consumers, scientists, and policymakers. Ensuring the safety of these additives is crucial to public health. Carrageenan (CGN), a common additive in the food industry, has become the subject of controversy, particularly regarding whether it can be degraded in the gastrointestinal tract, forming degraded carrageenans (dCGNs) that may pose health risks. This study is among the first to identify Bacteroides xylanisolvens C3 as a key gut bacterium involved in the degradation of food-grade lambda-CGN (L-CGN). Using high-performance liquid chromatography (HPLC), thin-layer chromatography (TLC), and metabolic analysis, we confirmed the ability of this bacterium to degrade L-CGN. Importantly, we found that the microbiota-generated dCGNs significantly increased nitric oxide (NO) and COX-2 production and upregulated pro-inflammatory genes, including IL-1β, TNF-α, and IL-6, in macrophages. This study also highlights how microbial degradation of L-CGN can drive inflammation, particularly through the activation of the Nrf2 and NLRP3 pathways. These results suggest that microbial degradation of L-CGN in the gut may contribute to inflammation, underscoring the need to better understand microbial interactions with food-grade L-CGN, particularly in the context of colon health and inflammation-related diseases such as inflammatory bowel disease.
