CeD patients in Northwest China exhibit a unique metabolic profile distinct from IBD and healthy controls, involving host central carbon metabolism, glycerophospholipid metabolism, gut microbiota, and other factors, which might underscore the multifactorial nature of coeliac disease implicating other factors beyond genetics and gluten.
Key Findings
Results
CeD patients reported significantly higher daily intakes of protein and carbohydrate compared to healthy controls and IBD patients, but showed relative insufficiency of the micronutrient niacin.
Dietary intake was assessed via food frequency questionnaires in 15 CeD patients, 15 healthy volunteers, and 30 IBD patients.
Despite higher macronutrient intake, niacin insufficiency was identified as a notable micronutrient deficiency in CeD patients.
Metabolomics data were adjusted according to energy and 17 specific nutrient covariates to control for dietary confounding.
Results
CeD patients exhibited decreased metabolites in the pentose phosphate pathway compared to healthy controls, independent of dietary intake.
This finding was identified using a pseudo-targeted metabolomics approach based on UHPLC-QTRAP-MS.
The alteration was present in CeD but not in IBD patients, suggesting disease specificity.
Analyses were adjusted for energy and 17 specific nutrient covariates to ensure dietary independence of findings.
Results
CeD patients showed increased intermediates of the citric acid cycle relative to healthy controls.
This metabolic alteration was identified independent of dietary intake after adjustment for energy and nutrient covariates.
The finding was specific to CeD and not observed in IBD patients.
This implicates alterations in host central carbon metabolism in CeD.
Results
The abundances of L-proline, D-proline, microbiota-related aromatic amino acid metabolites, glycine-conjugated bile acids, and the plant sterol panuosterone were increased in CeD patients.
Elevated microbiota-related aromatic amino acid metabolites suggest gut microbiota involvement in the metabolic profile of CeD.
Increased glycine-conjugated bile acids point to alterations in bile acid metabolism in CeD patients.
Panuosterone, a plant sterol, was found at higher abundance in CeD patients compared to controls.
These increases were identified relative to healthy controls and were distinct from IBD metabolic profiles.
Results
Several long-chain acylcarnitines were reduced in CeD patients despite their higher fat intake.
This paradoxical finding of reduced long-chain acylcarnitines despite higher dietary fat intake suggests impaired fatty acid oxidation or transport in CeD.
The reduction was independent of dietary intake after adjustment for energy and 17 specific nutrient covariates.
This metabolic alteration was present in CeD but not in IBD patients.
Results
The metabolic alterations identified in CeD patients were not present in IBD patients, indicating a CeD-specific metabolic signature.
The study included 30 IBD patients as a disease comparison group alongside 15 healthy controls.
Metabolic differences including pentose phosphate pathway changes, citric acid cycle intermediates, amino acid profiles, bile acid changes, and acylcarnitine reductions were specific to CeD.
This distinction supports the utility of metabolomics in differentiating CeD from other inflammatory gastrointestinal conditions.
Background
CeD is rarely reported in China, and this study represents a characterisation of the metabolic profile of Chinese CeD patients in Northwest China.
The study cohort consisted of 15 patients with CeD from Northwest China.
CeD is described as relatively common in Caucasian populations but rarely reported in China.
The authors state that 'the metabolic characteristics of Chinese patients with coeliac disease remain insufficiently characterised.'
Conclusions
The unique metabolic profile of CeD patients implicates host central carbon metabolism, glycerophospholipid metabolism, and gut microbiota as factors involved in the disease beyond genetics and gluten.
The metabolic alterations collectively point to involvement of multiple biological systems.
The authors suggest these findings 'might underscore the multifactorial nature of coeliac disease, implicating other factors beyond genetics and gluten.'
Glycerophospholipid metabolism was specifically identified as one of the altered metabolic domains.
What This Means
This research studied the chemical profiles in the blood (metabolomics) of 15 patients with coeliac disease (CeD) in Northwest China, comparing them to 15 healthy volunteers and 30 patients with inflammatory bowel disease (IBD). Using advanced mass spectrometry techniques and carefully accounting for differences in diet, the researchers found that CeD patients had a distinct pattern of metabolic changes in their blood that was not seen in either healthy people or IBD patients. These changes included shifts in how the body processes sugars (pentose phosphate pathway), energy production (citric acid cycle), certain amino acids, bile acids, and fats.
Notably, despite eating more protein, carbohydrates, and fat than controls or IBD patients, CeD patients were relatively deficient in the micronutrient niacin and had lower levels of long-chain acylcarnitines — molecules involved in fat burning — suggesting their bodies may not be processing nutrients normally. Elevated levels of microbiota-related metabolites also suggest that the gut bacteria of CeD patients may play a role in the disease's metabolic fingerprint. These findings held up even after the researchers adjusted their analyses to account for what patients were eating, meaning the differences are likely related to the disease itself rather than diet alone.
This research suggests that coeliac disease in Chinese patients involves complex changes across multiple body systems — including central energy metabolism, fat metabolism, gut bacteria, and bile acid processing — beyond the well-known role of gluten and genetic susceptibility. Because CeD is rarely reported in China, this study provides new insight into how the disease manifests metabolically in a non-Caucasian population, and highlights that factors beyond genetics and gluten exposure may contribute to the disease's development and effects on the body.
Zhang W, Wu X, Li Y, Huang Z, Hui W, Shi T, et al.. (2026). The plasma metabolome and clinical features of patients with coeliac disease in Northwest China.. Annals of medicine. https://doi.org/10.1080/07853890.2026.2668756