Research from Tongji University uncovers a transient rise in total bile acids during the initial stages of diabetic kidney damage, offering a new glimpse into early detection methods for this serious complication of diabetes.
A new study from Tongji University School of Medicine in Shanghai suggests that a common blood measure linked to digestion may also offer an early signal of diabetic kidney disease, one of diabetes’s most serious complications. Published in BMC Endocrine Disorders, the research found that total bile acids did not move in a simple straight line as kidney disease worsened. Instead, levels rose sharply at the earliest stage of diabetic kidney damage before falling again as the condition advanced.
That pattern matters because diabetic kidney disease often develops quietly. Current monitoring relies mainly on urine albumin-to-creatinine ratio, which detects protein leakage, and estimated glomerular filtration rate, which estimates how well the kidneys are filtering blood. Those measures are useful, but they can miss the earliest changes. The new findings add to growing interest in metabolic markers that might identify kidney injury sooner, building on earlier work in metabolomics that has pointed to small-molecule changes in urine and blood as possible warning signs of progression.
In the Shanghai study, researchers led by Lei Xu examined records from 485 people seen at Shanghai East Hospital between August 2025 and February 2026. The group included people with normal blood sugar, people with type 2 diabetes without kidney complications, and patients at three stages of diabetic kidney disease. The team found that total bile acids were modestly higher in uncomplicated diabetes, then climbed to their highest point at the earliest kidney-disease stage before dropping by stage three.
The statistical analysis suggested that the relationship was not accidental. After adjusting for factors including age, blood pressure, diabetes duration, body mass index, lipid levels, fatty liver status, kidney function and medication use, total bile acids remained independently linked with early-stage diabetic kidney disease. The study also found only moderate ability to separate early kidney disease from diabetes alone, which means the marker is promising but far from ready for routine use.
That caution is echoed by related research. A separate study in Nutrition & Diabetes reported stepwise changes in bile acid metabolism as diabetic kidney disease progressed, while earlier metabolomics work in type 1 diabetes also showed that biochemical profiles can help predict later kidney damage. Together, these studies suggest that metabolic disruption may be an important feature of kidney disease in diabetes, but they also underline the need for prospective studies in independent populations before any new marker can be put into practice.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
