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Glycemic Control, Safety and Tolerability of TC-6987 Monotherapy in Type 2 Diabetes Mellitus

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01293669
Recruitment Status : Completed
First Posted : February 10, 2011
Last Update Posted : September 13, 2013
Information provided by (Responsible Party):
Targacept Inc.

Brief Summary:
TC-6987 is a selective nicotinic α-7 receptor ligand (open channel stabilizer) that has demonstrated potent anti-inflammatory/antioxidant properties in animal models. Following the oral administration of a 1mg/kg dose of TC-6987 to diabetic mice (db/db mouse) for 7 weeks, numerous metabolic improvements were observed. Specifically, plasma glucose and triglyceride concentrations declined by approximately 30%; Hb1Ac was reduced by nearly 50%; and TNF-α declined more than 60% relative to control db/db mice Therefore, it appears that TC-6987 could prove beneficial in reducing elevated glucose concentrations in diabetic patients as well as in ameliorating organ damage associated with inflammation, oxidative stress and hyperglycemia.

Condition or disease Intervention/treatment Phase
Type 2 Diabetes Mellitus Drug: TC-6987 Drug: Placebo Phase 2

Detailed Description:
This is a Phase II, multicenter, randomized, double-blind, parallel group, placebo-controlled study to assess the efficacy, safety, tolerability, and pharmacokinetic parameters of TC-6987 in subjects with type 2 diabetes mellitus (T2DM). The study is organized into three phases: (a) Screening phase consisting of a 1-week Screening (Week -5)and a 4-week Washout (Week -4 to Day 1); (b) 4-week, Double-Blind Treatment (Day 1 to Week 4) during which subjects are randomized to either TC-6987 (20 mg on Day 1 and 10 mg from Day 2 to Week 4) or placebo; and (c) 2-week Follow-Up (Week 6). Unscheduled visits will be allowed between visits from Washout through Follow-up to evaluate a subject's glycemic status or other safety issues, as required. Subjects will fast overnight for a minimum of 10 hrs and refrain from drinking alcohol 24 hrs prior to each visit.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 440 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Phase II Study of Glycemic Control, Safety, Tolerability and Pharmacokinetic Parameters of TC-6987 Monotherapy in Subjects With Type 2 Diabetes Mellitus
Study Start Date : January 2011
Actual Primary Completion Date : January 2012
Actual Study Completion Date : January 2012

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: TC-6987 Drug: TC-6987
TC-6987-23 (TC-6987 HCl) as experimental treatment: 20 mg loading dose (2 capsules) on Day 1 and 10 mg (1 capsule) on Days 2 to 28 (dose expressed as free base). Each dose will be given once daily.

Placebo Comparator: Placebo Drug: Placebo
Matching placebo: Mode of administration: p.o. (microcrystalline cellulose in capsule) given once daily.

Primary Outcome Measures :
  1. Changes in fasting plasma glucose (FPG) [ Time Frame: Day 1 and Week 4 ]
    The primary efficacy endpoint will be FPG values obtained at Week 4 compared to Day 1 (baseline). This change from baseline will be analyzed using MMRM techniques with an alpha of 0.10 (one-sided), to examine differences between the TC-6987 and placebo treatment cohorts. This change from baseline will be analyzed using the primary efficacy endpoints for the mITT analysis set. The efficacy analyses based on the Per Protocol (PP) analysis set will be considered secondary.

Secondary Outcome Measures :
  1. Change in FPG from Day 1 (Baseline) at each time point [ Time Frame: Day 1, Week 1 and Week 4 ]
    Change in FPG from Day 1 (Baseline) compared to weeks 1 and 4

  2. Change in FPG and insulin from Day 1 (Baseline) at each time point [ Time Frame: Day 1, Week 1 and Week 4 ]
    Change in FPG and insulin from Day 1 (Baseline) compared to weeks 1 and 4

  3. Change in AUC FPG from Day 1 (Baseline) and at Week 4 [ Time Frame: Day 1 and Week 4 ]
    Change in AUC FPG from Day 1 (Baseline) compared to weeks 1 and 4

  4. Change in AUC insulin from Day 1 (Baseline) at Week 4 [ Time Frame: Day 1 and Week 4 ]
    Change in AUC insulin from Day 1 (Baseline) compared to week 4

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Males or postmenopausal/surgically sterile females
  • Being treated for T2DM with oral antidiabetic agents (excluding glitazones)
  • BMI limit ≤ 38
  • Subjects at least 80% compliant on reporting daily SMBG values during washout
  • At the end of washout the subject's fasting SMBG is higher than it was at the start of washout and the fasting SMBG ≤ 280.g treated for T2DM with oral antidiabetic agents (excluding glitazones)

Exclusion Criteria:

  • Type 1 diabetes mellitus
  • Severe complications of T2DM (especially diabetic retinopathy imminently requiring treatment for preserving or restoring vision, diabetic neuropathy with symptomatic orthostatic hypotension, urinary retention, gastric stasis, or pedal ulcers)
  • Current treatment with insulin or a glitazone
  • Use of moderate to strong cytochrome P450 3A4 (CYP3A4) inhibitors
  • FSH level of < 35 IU/L and a LH level < 25 IU/L except for confirmed surgically sterile women with functioning ovaries
  • Significant cardiovascular diseases (including arrhythmia) or congestive heart failure, or severe ischemic disease within the last 3 months prior to Screening, or evidence of stroke, myocardial infarction, unstable angina, coronary bypass and/or percutaneous transluminal coronary angioplasty
  • History of significant other major or unstable neurological, metabolic, hepatic, renal, hematological, pulmonary, CV, GI, or urological disorder; or diagnosis of major depressive disorder; if stable medical disorder, any medical treatment must be stable for last 2 months prior to Screening
  • History of diabetic ketoacidosis
  • Patients who have an increased red blood cell (RBC) turn-over or thalassemia or anemia
  • Known HIV or history of viral hepatitis type B or C
  • Systemic infection with TB
  • Current or previous use of oral or injectable corticosteroids 3 months prior to screening.
  • Subject has persistent, uncontrolled severe hypertension as indicated by a systolic blood pressure > 180 mmHg or a diastolic blood pressure of > 110 mmHg, with or without treatment
  • Subject has had a malignancy in the last 5 years, except for successfully treated basal or squamous cell carcinoma of the skin or of the cervix
  • Subject is receiving chemotherapy
  • Tobacco user within 4 months prior to Screening
  • Smoking cessation therapy within 4 months prior to Screening and/or planned during the study
  • Use of prohibited concomitant medications including psychoactive agents
  • History within 6 months prior to Screening of alcohol abuse or illicit drug abuse
  • Was administered study medication in another clinical trial in the past 3 months prior to Screening

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01293669

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Sponsors and Collaborators
Targacept Inc.
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Principal Investigator: Aaron Vinik, MD Strelitz Diabetes Center, Eastern Virginia Medical School
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Responsible Party: Targacept Inc. Identifier: NCT01293669    
Other Study ID Numbers: TC-6987-23-CRD-002
First Posted: February 10, 2011    Key Record Dates
Last Update Posted: September 13, 2013
Last Verified: July 2012
Keywords provided by Targacept Inc.:
Type 2 Diabetes
Type 2 Diabetes Mellitus
Additional relevant MeSH terms:
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Diabetes Mellitus
Diabetes Mellitus, Type 2
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases