An interventional study of Colesevelam HCL and Placebo in Diabetes, sponsored by Carine Beysen. Completed at 3 sites in United States. Open to participants aged 30 Years to 70 Years. Per ClinicalTrials.gov, last updated 2012-10-12.
Sponsored by Carine Beysen · Not applicable, Interventional, and Basic science
The mechanism by which colesevelam HCl lowers glucose is not known. Knowledge of the potential mechanism of action is important for defining the role of the drug among oral antidiabetic agents available for use in subjects with diabetes. The objective of this study is to provide insight into the mechanisms of action of colesevelam HCl in T2DM. The mechanisms of interest include hepatic insulin sensitivity, rate of appearance of exogenous glucose and changes in incretin hormone concentrations.
Colesevelam HCl (marketed in the U.S. as WelChol®) is a non-absorbed polymer that binds bile acids in the intestine, impeding their reabsorption, and is indicated to lower low-density lipoprotein cholesterol (LDL-C) in subjects with hypercholesterolemia. As the bile acid pool becomes depleted, the hepatic enzyme cholesterol 7-(alpha)-hydroxylase is upregulated, increasing the conversion of cholesterol to bile acids. This causes an increased demand for cholesterol in the liver, resulting in the dual effect of increasing transcription and activity of the cholesterol biosynthetic enzyme, hydroxymethyl-glutaryl-coenzyme A (HMG CoA) reductase, and increasing the number of hepatic low-density lipoprotein (LDL) receptors. These compensatory effects increase the clearance of LDL-C from the blood, decreasing serum LDL C levels (1; 2).
Recently, it has been shown that colesevelam HCl also improves glycemic control in subjects with T2DM who are not controlled adequately on metformin, sulfonylurea or a combination of the two drugs (3). The mechanism of action for glucose lowering is not known. Improved glycemic control with colesevelam HCl treatment could be due to any of several mechanisms. Colesevelam HCl could reduce hepatic insulin resistance and lead to a decrease in hepatic glucose production (HGP). The observation by Schwartz et al (4) of significantly reduced fasting plasma glucose concentrations in colesevelam-treated T2DM patients suggests such a reduction in HGP, as fasting hyperglycemia is a direct function of HGP. Colesevelam HCl could also decrease post-prandial glucose absorption. Changes in glucose absorption with other bile acid sequestrants (BAS) (5) and bile acids (6) have been reported.
With regard to molecular mediators of the colesevelam effect on glucose metabolism, there is considerable evidence emerging about the role of bile acids and nuclear transcription factors, such as the farnesyl X receptor (FXR), in the regulation of glucose and lipid metabolism (7) (8) (9-15). Changes in cellular lipids or nuclear hormone receptors might directly alter HGP although mechanisms leading to changes in hepatic lipid and glucose metabolism by colesevelam HCl have not previously been investigated.
Significant changes in cholesterol and bile acid synthesis rates are expected with colesevelam treatment. BAS treatment can alter the transhepatic flux and compositional profile of the circulating bile acid pool (16), and thus its hydrophobicity, and this may effect the activation of nuclear receptors, including FXR (17; 18). Determination of the effect of colesevelam treatment on bile acid synthesis may provide evidence for its metabolic effects. The effects on hepatic fatty acid synthesis (de novo lipogenesis or DNL) have not been investigated and may provide further evidence for a metabolic effect of colesevelam.
Specific hypotheses about its mode of action will be tested, focusing on hepatic glucose metabolism and intestinal glucose absorption.
10,925 studies on the registry are indexed under Diabetes Mellitus; 1,319 are open to participants now.
This study's enrollment of 60 is below the median of 80 across 8,367 interventional studies indexed under Diabetes Mellitus.
Browse Diabetes Mellitus studies →This is the only study on the registry with Carine Beysen as lead sponsor.
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Subjects meeting the following criteria at the Screening Visit will be eligible to participate in the trial:
Male or Female
Females of childbearing potential who are on approved birth control method:
oral, injectable, or implantable hormonal contraceptives; intrauterine device; diaphragm plus spermicide or female condom plus spermicide
Exclusion Criteria:
Subjects are excluded from participation in the study if any of the following criteria apply:
Type-2 diabetes mellitus patients
Drug: Placebo
Type-2 diabetes mellitus patients
Drug: Colesevelam HCL
Colesevelam HCL 625 mg: 3 tablets twice per day
Also known as: WelChol
Placebo tablets: 3 tablets twice per day
Fasting Endogenous Glucose Production (EGP)
Changes from baseline of fasting EGP after 12 weeks of placebo or colesevelam treatment.
Time frame: baseline and 12 weeks
Fasting Gluconeogenesis
Change from baseline of fasting gluconeogenesis after 12 weeks of placebo or colesevelam treatment.
Time frame: baseline and 12 weeks
Fasting Glycogenolysis
Change from baseline of fasting glycogenolysis after 12 weeks of placebo or colesevelam treatment.
Time frame: baseline and 12 weeks
Rate of Appearance of Exogenous Glucose (Glucose Absorption)
Change from baseline of the rate of appearance of oral glucose after 12 weeks of placebo or colesevelam treatment. Mean of values obtained between 0 and 300 min is reported.
Time frame: baseline and 12 weeks
Total Glucagon-like Peptide (GLP-1) Area Under the Curve (AUC)
Changes from baseline of total GLP-1 AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
Time frame: baseline and 12 weeks
Total Glucose-dependent Insulinotropic Polypeptide (GIP) AUC
Changes from baseline of total GIP-1 AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
Time frame: baseline and 12 weeks
Fasting Fractional De Novo Lipogenesis (DNL)
Changes from baseline in fasting fractional DNL after 12 weeks of colesevelam or placebo treatment were calculated. Fractional DNL represents the fraction of palmitate in very-low density lipoproteins-triglycerides (VLDL-TG) that was newly synthesized.
Time frame: baseline and 12 weeks
Fasting Fractional Cholesterol Synthesis
Changes from baseline in fasting fractional cholesterol synthesis after 12 weeks of colesevelam or placebo treatment. Fractional Cholesterol synthesis represents the fraction of free cholesterol in plasma that was newly synthesised.
Time frame: baseline and 12 weeks
Postprandial Fractional Cholic Acid Synthesis
Changes from baseline in fractional cholic acid synthesis after 12 weeks of colesevelam or placebo treatment were evaluated. Fractional cholic acid synthesis represents the relative amount of cholic acid that is made from newly synthesised cholesterol.
Time frame: baseline and 12 weeks
Glucagon AUC
Changes from baseline of glucagon AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
Time frame: baseline and 12 weeks
Glycosylated Hemoglobin (HbAlc)
Changes from baseline of HbA1c after 12 weeks of placebo or colesevelam treatment.
Time frame: baseline and 12 weeks
Glucose AUC
Changes from baseline of glucose AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
Time frame: baseline and 12 weeks
Participants with type 2 diabetes. All pre-existing drug treatments were stable for at least 3 months prior.
| Milestone | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Started | 30 | 30 |
| Completed | 26 | 28 |
| Not completed | 4 | 2 |
| Withdrew: Withdrawal by subject | 2 | 2 |
| Withdrew: Increased fasting triacylglycerol level | 1 | 0 |
| Withdrew: Protocol violation | 1 | 0 |
Changes from baseline of total GLP-1 AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
| picomoles (pmol)/Liter (L) x minute (min | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Total Glucagon-like Peptide (GLP-1) Area Under the Curve (AUC) | 5 ± 2 | -3 ± 1 |
Changes from baseline of total GIP-1 AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
| pmol/l x min | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Total Glucose-dependent Insulinotropic Polypeptide (GIP) AUC | 7 ± 2 | -6 ± 2 |
Changes from baseline of fasting EGP after 12 weeks of placebo or colesevelam treatment.
| umol per kg Fat-Free Mass (FFM) per min | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Fasting Endogenous Glucose Production (EGP) | 0.19 ± 0.78 | 1.59 ± 0.77 |
Changes from baseline of HbA1c after 12 weeks of placebo or colesevelam treatment.
| percentage | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Glycosylated Hemoglobin (HbAlc) | -0.3 ± 0.2 | 0.3 ± 0.2 |
Changes from baseline of glucose AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
| millimoles (mmol)/l x min | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Glucose AUC | -0.8 ± 0.4 | 0.5 ± 0.4 |
Change from baseline of fasting gluconeogenesis after 12 weeks of placebo or colesevelam treatment.
| micromoles (µmol) per kg FFM per min | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Fasting Gluconeogenesis | 0.02 ± 0.32 | -0.19 ± 0.27 |
Change from baseline of fasting glycogenolysis after 12 weeks of placebo or colesevelam treatment.
| µmol per kilograms (kg) FFM per min | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Fasting Glycogenolysis | 0.11 ± 0.81 | 1.78 ± 0.69 |
Change from baseline of the rate of appearance of oral glucose after 12 weeks of placebo or colesevelam treatment. Mean of values obtained between 0 and 300 min is reported.
| µmol per kg FFM per minute (min) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Rate of Appearance of Exogenous Glucose (Glucose Absorption) | 0 ± 0.56 | 1 ± 0.63 |
Changes from baseline in fasting fractional DNL after 12 weeks of colesevelam or placebo treatment were calculated. Fractional DNL represents the fraction of palmitate in very-low density lipoproteins-triglycerides (VLDL-TG) that was newly synthesized.
| percent new palmitate | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Fasting Fractional De Novo Lipogenesis (DNL) | -0.6 ± 0.57 | -1.4 ± 0.58 |
Changes from baseline in fasting fractional cholesterol synthesis after 12 weeks of colesevelam or placebo treatment. Fractional Cholesterol synthesis represents the fraction of free cholesterol in plasma that was newly synthesised.
| Percent new cholesterol | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Fasting Fractional Cholesterol Synthesis | 3.0 ± 0.4 | 0.5 ± 0.4 |
Changes from baseline in fractional cholic acid synthesis after 12 weeks of colesevelam or placebo treatment were evaluated. Fractional cholic acid synthesis represents the relative amount of cholic acid that is made from newly synthesised cholesterol.
| Percent new cholic acid | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Postprandial Fractional Cholic Acid Synthesis | 5.5 ± 1.0 | 1.7 ± 1.0 |
Changes from baseline of glucagon AUC after 12 weeks of placebo or colesevelam treatment. AUC values were calculated by the trapezoid method using all results between 0 and 300 minutes
| picograms (pg)/milliter (ml) x min | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| Glucagon AUC | 4 ± 3 | -4 ± 4 |
Collected over 12 weeks. Non-serious events are listed at a 3.57% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Type-2 Diabetes Mellitus Patients Treated With Colesevelam | — | 0/30 (0%) | 19/26 (73.1%) |
| Type-2 Diabetes Mellitus Patients Treated With Placebo | — | 0/30 (0%) | 23/28 (82.1%) |
| Event | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo |
|---|---|---|
| DiarrheaGastrointestinal disorders | 0/26 | 5/28 |
| NauseaGastrointestinal disorders | 3/26 | 5/28 |
| HeadacheNervous system disorders | 4/26 | 5/28 |
| CoughRespiratory, thoracic and mediastinal disorders | 2/26 | 1/28 |
| LethargicMusculoskeletal and connective tissue disorders | 2/26 | 0/28 |
| DyspepsiaGastrointestinal disorders | 0/26 | 2/28 |
| Sinus congestionRespiratory, thoracic and mediastinal disorders | 0/26 | 2/28 |
| Abdominal crampsGastrointestinal disorders | 1/26 | 0/28 |
| ConstipationGastrointestinal disorders | 1/26 | 1/28 |
| Chest congestionRespiratory, thoracic and mediastinal disorders | 1/26 | 0/28 |
| Age, Categorical(Participants) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| <=18 years | 0 | 0 | 0 |
| Between 18 and 65 years | 24 | 25 | 49 |
| >=65 years | 6 | 5 | 11 |
| Age Continuous(years) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| Mean | 59 ± 9 | 56 ± 9 | 57.5 ± 9 |
| Sex: Female, Male(Participants) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| Female | 12 | 14 | 26 |
| Male | 18 | 16 | 34 |
| Region of Enrollment(participants) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| United States | 30 | 30 | 60 |
| BMI(kg/m2) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| Mean | 30 ± 5 | 31 ± 5 | 30.5 ± 5 |
| Weight(kg) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| Mean | 84 ± 16 | 88 ± 19 | 86 ± 18 |
| HbA 1c(percentage) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| Mean | 8.5 ± 1.2 | 8.0 ± 0.9 | 8.25 ± 1.05 |
| Glucose(mmol/l) | Type-2 Diabetes Mellitus Patients Treated With Colesevelam | Type-2 Diabetes Mellitus Patients Treated With Placebo | Total |
|---|---|---|---|
| Mean | 9.2 ± 2.3 | 8.4 ± 2.4 | 8.8 ± 2.3 |
5 further baseline measures are reported on the registry.
This study is completed, as verified in Oct 2012. You cannot join it, but the record below documents what was studied.
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