Serum Sphingolipidomic Analyses in Healthy, Diabetic and Prediabetic Subjects

Study Overview
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Brief Summary
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This study is designed to compare the serum sphingolipidomic analyses in healthy, pre-diabetic and diabetic subjects. age, sex and BMI are matched among these three groups. As ceramide, sphingosine, sphingosine-1-phosphate and sphinganine are involved in inflammation, immunity and cancer, investigators proposed a hypothesis that sphingosine-1-phosphate and other sphingolipids may be associated with the progress of type 2 diabetes. sphingolipids may be a biomarker for diabetes.

Detailed Description
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The first purpose of this study is to determine whether serum sphingolipid metabolites associate significantly with the weight among type 2 diabetes. 60 patients with diagnosed type 2 diabetes will be recruited. The serum concentrations of sphingolipid metabolites of 20 type 2 diabetic patients with obesity will be compared to age- and sex-matched series of 40 type 2 patients without obesity. The second purpose of this study is to determine whether serum sphingolipid metabolites associate significantly with the process and severity of type 2 diabetes. The serum concentrations of sphingolipid metabolites of 20 subjects with type 2 diabetes will be compared to age-, sex- and BMI-matched series of healthy and pre-diabetic subjects. Investigators speculate that the serum concentration of sphingolipid metabolites are positively related with the progression of diabetes. In order to discover why serum sphingolipid metabolites correlates with the progression of diabetes, detailed information on HbA1c, duration of diabetes history and insulin resistance defined by homeostatic model assessment (HOMA-IR) will be analysed. These three parameters may affect the serum concentrations of sphingolipid metabolites.

Official Title
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Comparison of Serum Sphingolipidomic Analyses in Healthy, Pre-diabetic and Diabetic Subjects

Conditions
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Diabetes Mellitus, Type 2, Prediabetic State

Intervention / Treatment
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* Other: diabetes


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: clinical diagnosis of diabetes mellitus, type 2 clinical diagnosis of prediabetic status older than 18 and younger than 90 years-old clinical diagnosis of insulin-resistance clinical diagnosis of newly onset of diabetes mellitus, type 2 those who are willing to participate in the trial and sign the consent form Exclusion Criteria: any cardiovascular disease (myocardial infarction, heart failure, cerebrovascular accident) missing information of BMI sever liver, kidney dysfunction sever pancreatitis or those who received pancreatectomy on medications of hormone, immunosuppressive therapy or drugs that may affect the bioactivity or concentration of sphingolipids (e.g. asprin ) patients on pregnancy sever systematic diseases including carcinoma, mental disorder, sever anemia et al.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 90 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| serum sphingolipid metabolites in healthy subjects<br>Healthy subjects are classified according to BMI into three subgroups: healthy normal weight subjects, healthy overweight subjects and healthy subjects with obesity. Age and sex are matched among three subgroups. serum sphingolipid metabolites including sphingosine-1-phosphate will be compared. | |
| serum sphingolipid metabolites in diabetic subjects<br>Diagnosed diabetic patients are divided into three subgroups: diabetic patients with normal weight, overweight and obesity. age and sex are matched. | Other: diabetes<br>* the exposure of interests are obesity, diabetes and insulin-resistance<br>* Other names: insulin-resistance;|
| serum sphingolipid metabolites in the progression of diabetes<br>serum sphingolipid metabolites are compared among three age-, sex- and body mass index-matched subgroups: healthy subjects, subjects with pre-diabetes, subjects with diabetes | Other: diabetes<br>* the exposure of interests are obesity, diabetes and insulin-resistance<br>* Other names: insulin-resistance;|
| serum sphingolipid metabolites and HbA1c<br>diabetic subjects are divided by HbA1c level. the cut-offs are 7% and 9%. serum sphingolipid metabolites will be tested among diabetic patients with HbA1c <7%, 7%-9% and >9% | Other: diabetes<br>* the exposure of interests are obesity, diabetes and insulin-resistance<br>* Other names: insulin-resistance;|
| serum sphingolipid metabolites in insulin-resistant subjects<br>comparison of serum sphingolipid metabolites in newly diagnosed insulin-resistant subjects and age-, sex- and BMI-matched healthy controls. | Other: diabetes<br>* the exposure of interests are obesity, diabetes and insulin-resistance<br>* Other names: insulin-resistance;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| serum concentration of sphingosine-1-phosphate, micromol per liter |  | Nov, 2016 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| serum concentration of sphingosine, micromol per liter |  | Nov, 2016 | 
| serum concentration of sphinganine-1-phosphate, micromol per liter |  | Nov, 2016 | 
| serum concentration of sphinganine, micromol per liter |  | Nov, 2016 | 
| serum concentration of ceramide, micromol per liter |  | Nov, 2016 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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sphingolipid, diabetes mellitus, biomarker, obesity, insulin resistance