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Effects of HX106 on Improvement in Cognitive-Bio-Markers of Memory Function

This study has been completed.
Information provided by (Responsible Party):
In Kyoon Lyoo, Ewha Womans University Identifier:
First received: September 26, 2013
Last updated: May 25, 2015
Last verified: May 2015
The objectives of the current study are to evaluate the efficacy and safety of HX106 in healthy adults with subjective memory complaints for improving neurocognitive functions and to find the changes of brain using magnetic resonance imaging and their associations with the neurocognitive function enhancement.

Condition Intervention
Healthy Adults With Subjective Memory Complaints Dietary Supplement: HX106 590mg Dietary Supplement: HX106 1180mg Dietary Supplement: Placebo

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Effects of HX106 on Improvement in Cognitive-Bio-Markers of Memory Function in Healthy Adults With Subjective Memory Complaints: An 8-Week Prospective Randomized Double-Blind Placebo-Controlled Trial With Multimodal Neuroimaging and Neurocognitive Assessments

Resource links provided by NLM:

Further study details as provided by In Kyoon Lyoo, Ewha Womans University:

Primary Outcome Measures:
  • Changes From Baseline in Working Memory Domain Z-score [ Time Frame: Baseline, 8th week ]

    To assess the working memory performance, four well-established tests, including the symbol span from the Wechsler Memory Scale-IV, immediate recall domain from the Rey-Osterrieth Complex Figure Test, digit span, and letter number sequencing from the Korean version of the Wechsler Adult Intelligence Scale were chosen.

    Each test score was adjusted with age, sex, intelligent quotient, years of education, and baseline test scores. The adjusted test scores were then standardized into z-scores using all participants' means and standard deviations. The relative improvement (positive z-scores) or decline (negative z-scores) in performance was measured in a unit-free manner using the obtained z-scores. The individual z-scores of each test were averaged to the composite score for working memory domain.

  • Changes From Baseline in White Matter Integrity Assessment [ Time Frame: Baseline, 8th weeks ]

Secondary Outcome Measures:
  • Number of Participants With Adverse Events [ Time Frame: 1st week ]
  • Number of Participants With Adverse Events [ Time Frame: 4th weeks ]
  • Number of Participants With Adverse Events [ Time Frame: 8th weeks ]

Enrollment: 75
Study Start Date: March 2012
Study Completion Date: January 2013
Primary Completion Date: January 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: HX106 590mg
HX106 590mg/day
Dietary Supplement: HX106 590mg
Experimental: HX106 1180mg
HX106 1180mg/day
Dietary Supplement: HX106 1180mg
Placebo Comparator: Placebo
Dietary Supplement: Placebo


Ages Eligible for Study:   20 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Age between 20 and 60 years old,
  • Global Deterioration Scale score (GDS) of 2
  • One or more symptoms of subjective memory impairment
  • High school or higher levels of education.

Exclusion Criteria:

  • Current pregnancy or breast-feeding
  • Evidence of neurologic or medical conditions
  • Axis I diagnosis when assessed by the board certified psychiatrist using the Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorder, 4th edition (DSM-IV)(SCID-IV),
  • One or more major depressive episode during last 12 months
  • Mini-mental status examination score of 24 or less
  • Clinical Dementia Rating score of 0.5 or more suggesting cognitive impairment beyond self-perceived subjective deficits
  • Intelligence quotient less than 80
  • Any history of head trauma involving loss of consciousness or seizure
  • Contraindications to magnetic resonance imaging (MRI)
  • Use of psychotropics in last 3 months
  • Use of oral contraceptive medication
  • Participation in other clinical trials during the study period that might affect the outcome of the present study.
  Contacts and Locations
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Please refer to this study by its identifier: NCT01956097

Korea, Republic of
Ewha W. University
Seoul, Korea, Republic of, 120-750
Sponsors and Collaborators
Ewha Womans University
Principal Investigator: In Kyoon Lyoo, MD, PhD, MMS Ewha W. University
  More Information

Responsible Party: In Kyoon Lyoo, Professor, Ewha Womans University Identifier: NCT01956097     History of Changes
Other Study ID Numbers: HX106
Study First Received: September 26, 2013
Results First Received: April 9, 2015
Last Updated: May 25, 2015 processed this record on September 19, 2017