Efficacy of Acarbose on Intestinal Microbiome and Incretins of Type 2 Diabetes
This study is aimed to investigate the effect of acarbose on intestinal microbiome and incretins, therefore to explore the new pathways or new targets to treat type 2 diabetes.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||An Open-label, Randomized , Phase 4 Study to Compare the Different Efficacies of α-glucosidase Inhibitor and Sulfonylurea on Improvement of Intestinal Microbiome and Serum Incretins in Patients With Type 2 Diabetes|
- euglycemia [ Time Frame: 3 months ] [ Designated as safety issue: No ]
|Study Start Date:||December 2012|
|Estimated Study Completion Date:||June 2014|
|Estimated Primary Completion Date:||December 2013 (Final data collection date for primary outcome measure)|
The minimum dosage of acarbose in this study is 100mg tid p.o.(oral) for 3 month. With this dosage, patients should have similar glycemic control with those using glipizide, that is FBG(fasting blood glucose)<7.0,PBG(postprandial blood glucose)<10.0
Acarbose 50mg per pill 100mg to 150mgtid p.o.（oral） for 3 month
Other Name: glucobay
Active Comparator: glipizide
There is no fixed dosage of glipizide to control hyperglycemia for patients in this group. As long as the targeted blood glucose concentration is reached, FBG< 7.0, PBG< 10.0, patients will have the least dosage of glipizide according to their glucose level.
glipizide 5mg per pill 5mg tid p.o. for 3 month
In recent years, Endocrinologist and Diabetologists have found that intestine might serve as a novel target for treating diabetes or other metabolic diseases. Incretins are well-known hormones secreted from intestine, such as CCK（Cholecystokinin), Serotonin, GIP(gastric inhibitory polypeptide) and GLP-1(glucagon like peptide 1), to help control wholesome metabolic status through their effects on pancreatic islet cells, hypothalamus neurons and gastrointestinal movement. Gut microbiome has been recently revealed exerting major effect on host's immune system and metabolic balance with its various metabolites and components.
α-glucosidase inhibitors have been used as anti-diabetes medicine for dozens of years. They are known to be effective by delaying glucose absorption in small intestine. Questions then have been arisen that if delaying glucose absorption changes the intestinal bacteria flora component by increasing bacteria fed on glucose, or that if it influences incretin secretion, since most glucose sensitive L cell (secreting GLP-1) were located in the distal part of small intestine and colon, and that if the hypoglycemia effect of α-glucosidase inhibitors might be mediated by either intestinal flora or incretins.
To address the questions above and to find the new targets from the intestine to treat diabetes, we therefore design this study, taking advantage of clinical trial and basic biomedical studies to find if α-glucosidase inhibitor- Acarbose (Bayer, Corp.) could change the profile of intestinal incretins and microbiome.
- Multi-center, open label, randomized, positive control cohort.
- 110 cases of newly-diagnosed Type-2 Diabetes patients from five clinic centers from Shanghai, China Mainland.
- All patients will sign the consent and screened by the criteria before enrolled by this study.
- 55 cases of Type 2 Diabetes will be assigned to glucobay treatment and another 55 will take glipizide.
- 50 healthy volunteers for baseline data comparison.
The duration of whole study will be 3 month.
- Before treatment, all the patients will be required to have OGTT(oral glucose tolerant test) and IRT(insulin release test) test and give their feces. Standard meals will be required one day before the feces are collected.
- In 3 months, all patients will take the medicine and their glucose will be monitored closely by visiting outpatient office once a month.
- In the end of the study, patients will be required to receive OGTT and IRT and give their feces again.
- Serum and feces will be stored at -80℃ for further biomarkers investigation and microbiome sequencing.
- After 3 months intervention, patients will be observed for another 3 month with access to routine clinic visiting.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01758471
|Contact: Guang Ning, M.D. Ph.D.||86-021-64370045 ext firstname.lastname@example.org|
|Contact: Yanyun Gu, M.D. Ph.D.||86-021-64370045 ext email@example.com|
|Shanghai Clinic Center for Endocrine and Metabolic Diseases, Ruijin Hospital, Shanghai Institute for Endocrine and Metabolic Diseases||Recruiting|
|Shanghai, Shanghai, China, 200025|
|Contact: Guang Ning, M.D. 86-021-64370045 ext 665344|
|Principal Investigator:||Guang Ning, M.D. Ph.D.||Shanghai JiaoTong University School of Medicine|