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A Randomized Trial to Assess the Efficacy and Safety of GO2KA1(Chitosan Oligosaccharide)on Blood Glucose Control

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ClinicalTrials.gov Identifier: NCT01496820
Recruitment Status : Completed
First Posted : December 21, 2011
Last Update Posted : July 17, 2013
Information provided by (Responsible Party):
Yonsei University

December 18, 2011
December 21, 2011
July 17, 2013
July 2011
October 2012   (Final data collection date for primary outcome measure)
Postprandial blood glucose(PPG) [ Time Frame: Change from baseline in PPG at 12 weeks ]
Primary outcome will be tested for 2 hours at every 30 min interval after 75g-OGTT and the experimental group will be pre-fed with 500 mg of GO2KA1.
Same as current
Complete list of historical versions of study NCT01496820 on ClinicalTrials.gov Archive Site
  • HbA1c [ Time Frame: Change from baseline in HbA1c at 12 weeks ]
  • Insulin [ Time Frame: Change from baseline in insulin at 12 weeks ]
  • glycemic AUC [ Time Frame: Change from baseline in glycemic AUC at 12 weeks ]
  • Total cholesterol [ Time Frame: Change from baseline in Total cholesterol at 12 weeks ]
  • Triglyceride [ Time Frame: Change from baseline in triglyceride at 12 weeks ]
  • HDL-cholesterol [ Time Frame: Change from baseline in HDL-cholesterol at 12 weeks ]
Same as current
Not Provided
Not Provided
A Randomized Trial to Assess the Efficacy and Safety of GO2KA1(Chitosan Oligosaccharide)on Blood Glucose Control
Effect of GO2KA1(Chitosan Oligosaccharide) on Postprandial Blood Glucose in Korean Adults: a Clinical Randomized Trial
The effects of chitosan on blood glucose levels have been contradicting. Hypoglycemic effects of high molecular weight chitosan are related to diabetic models with hypoinsulinemia but have shown little effect on the blood glucose levels in hyperinsulinemia related diabetic models. Based on previous reports, high molecular weight chitosan either directly or indirectly related to insulin secretion in pancreas but has little effect on insulin resistance. In the present study, the effect of GO2KA1 (low molecular weight chitosan oligosaccharide) on blood glucose levels in Korean pre-diabetic adults, will be evaluated. The changes in postprandial blood glucose levels will be investigated in subjects with impaired fasting glucose or glucose tolerance.

In the detailed description we believe that it will be wise to discuss about the long-term study of the effect of GO2KA1(Chitosan oligosaccharide: oligosaccharides derived from chitosan) on pre-diabetic individuals (in addition to the postprandial blood glucose levels). In the present study, we will investigate the effects of GO2KA1 on the level of postprandial blood glucose in adult Koreans with impaired fasting glucose or impaired glucose tolerance. Postprandial blood glucose levels will be tested for 2 hours at every 30 min interval after 75g-OGTT and the experimental group will be pre-fed with 500 mg of GO2KA1. Primary outcomes will be included change in HbA1c, insulin, glycemic AUC, and lipids(total cholesterol, triglyceride, and HDL).

This clinical study will be conducted with 60 subjects after explanation and accommodation about experimental protocols and model. To test under same condition, smoking and drinking water will be completely prohibit from 1 hour before and during the experiment. At first day, control experiment will be conducted without oral take of GO2KA1 or placebo.

Phase 2
Phase 3
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Prevention
Impaired Fasting Glucose, Newly-diagnosed Type 2 Diabetes
  • Dietary Supplement: GO2KA1
    GO2KA1(chitosan oligosaccharide)1500mg/day for 12weeks
  • Dietary Supplement: Placebo
    placebo 1500mg/day for 12weeks
  • Experimental: GO2KA1
    Intervention: Dietary Supplement: GO2KA1
  • Placebo Comparator: Placebo
    Intervention: Dietary Supplement: Placebo
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
December 2012
October 2012   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • males and females 20-75 years old
  • impaired fasting glucose (FPG 100~125 mg/dL) or impaired glucose tolerance (PPG-2h 140~200 mg/dL)
  • able to give informed consent

Exclusion Criteria:

  • having received a diagnosis of diabetes or receiving treatment for diabetes
  • having a history of ischemic heart disease, stroke, liver cirrhosis, chronic pancreatitis, pituitary disease, thyroid disease, adrenal gland disease, mental illness, gastrectomy, or advanced malignant tumor
  • receiving corticosteroid or thyroid hormone medication
  • being judged by the responsible physician of the local study center as unfit to participate in the study
  • abnormal liver or kidney function tests (ALT or AST > 2 times the upper limit of normal
  • elevated creatinine, males > 125 umol/L, females > 110 umol/L)
Sexes Eligible for Study: All
20 Years to 75 Years   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
Korea, Republic of
Not Provided
Not Provided
Yonsei University
Yonsei University
Not Provided
Principal Investigator: Jong-Ho Lee, PhD Yonsei University
Yonsei University
July 2013

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP