An observational study in Diabetes-Related Complications, sponsored by Affiliated Hospital of Nantong University. Recruiting at 1 site in China. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2025-05-28.
Sponsored by Affiliated Hospital of Nantong University · Observational
The incidence of type 2 diabetes with comorbid depression (T2DD) is notably high, characterized by prolonged disease duration and susceptibility to recurrence. The preliminary experiments identified 5-AVAB, a gut microbiota-derived metabolite, as a potential novel biomarker for T2DD progression. Given the absence of existing research in this area, it warrants in-depth investigation.
The investigators plan to collect fecal and serum samples from participants with type 2 diabetes and those with T2DD to quantify 5-AVAB levels, as well as conduct in vitro gut microbiota culturing and sequencing studies.
This study will enroll two groups of participants: a control group (with type 2 diabetes) and a T2DD group (with type 2 diabetes with comorbid depression) (n=20 per group). From each participant, 5 mL of whole blood and 5 g of fresh stool will be collected. The whole blood samples will be processed for serum extraction. The 5-AVAB concentrations in all samples will be quantified using LC-MS/MS and compared between groups.
Anaerobic culture medium will be prepared, and the fresh stool samples will be homogenized with the medium at a ratio of 1 g:20 mL. After 20 minutes of pre-incubation at 37°C under anaerobic conditions, berberine will be added at concentrations of 10 μg/mL, 50 μg/mL, and 100 μg/mL, followed by incubation for 2, 6, 12, and 24 hours. The 5-AVAB levels in each group will then be measured using LC-MS/MS. The additional requirements are as follows:
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This study's planned enrollment of 40 is below the median of 233 across 2,220 observational studies indexed under Diabetes Mellitus.
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The Con group was diagnosed with type 2 diabetes and had no history of mental disorders such as depression; The T2DD patient group was diagnosed with type 2 diabetes and depression, where the depression met the DSM-5 diagnostic criteria for recurrent depression without psychotic symptoms or single-episode MDD, and the total score of the HAMD-17 scale was ≥22 points;
Exclusion Criteria:
The clinical inclusion criteria are as follows: a. Age 18-65 years old; b. The Con group was diagnosed with type 2 diabetes and had no history of mental disorders such as depression; c. No antibiotics, prebiotics, probiotics, enteral nutrition drugs, etc. were used within 3 months before diagnosis, and no antibiotics, prebiotics, probiotics, enteral nutrition drugs, etc. were used during treatment.
Other: No intervention
The clinical inclusion criteria are as follows: a. Age 18-65 years old; b. The T2DD patient group was diagnosed with type 2 diabetes complicated with depression (depression met the DSM-5 diagnostic criteria); c. No antibiotics, prebiotics, probiotics, enteral nutrition drugs, etc. were used within 3 months before diagnosis, and no antibiotics, prebiotics, probiotics, enteral nutrition drugs, etc. were used during treatment.
Other: No intervention
No intervention
The levels of 5-AVAB
There were no additional intervention measures in this study. Faeces were collected after excretion for in vitro drug intervention experiments. The blood collection volume (5 mL) met the ISO international standard and was used to detect the 5-AVAB content in each group.
Time frame: 3 years
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Plan to share: No
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Affiliated Hospital of Nantong University