Clinical trial NCT01990092: The Nutritional Benefits of Metanx in Patients With Diabetic Peripheral Neuropathy (MEDIAN)
Official title: A Multicenter, Randomized, Double-Blind, Placebo-Controlled Trial to Assess the Safety and Nutritional Benefits of Metanx® in Subjects With Diabetic Peripheral Neuropathy
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Diabetic Peripheral Neuropathy
B Vitamin Deficiency
Keywords: Metanx
B vitamins
neuropathy
nutrition
Lead sponsor: Pamlab, Inc.
Sponsor class: INDUSTRY
First posted: 2013-11-21
Enrollment: 238
Sex: ALL
Minimum age (years): 25
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: SUPPORTIVE_CARE

Brief summary: The objectives of the MEDIAN study are to evaluate the short-term and long-term safety and nutritional benefits of Metanx® versus placebo in subjects with mild to moderate diabetic peripheral neuropathy (DPN). Short-term effects will be evaluated during the first 16 weeks of treatment, and long-term effects will be evaluated over the duration of a 48 week treatment period.


Eligibility criteria: Inclusion Criteria:

* Be male or female between 25 and 80 years of age, inclusive, at the time of consent
* Have a diagnosis of diabetes mellitus Type 2 as defined by the American Diabetes Association and on stable therapy as defined per the investigator's opinion for at least 1 month before the Screening Visit.
* Have a diagnosis of DPN established at least 6 months but not greater than 7 years prior to Screening
* If receiving DPN-related medication, doses must be stable for at least 6 weeks and should be taking only one of the following medications compliant with Exclusion Criterion 7:

  * Alpha-2-delta ligand \[e.g., pregabalin (Lyrica) or gabapentin (Neurontin)
  * Anticonvulsant \[e.g., carbamazepine, topiramate (Topamax), valproic acid (Depakote) or lamotrigine (Lamictal)\]
  * Serotonin-norepinephrine Reuptake Inhibitor (SNRI) \[e.g., duloxetine (Cymbalta) or venlafaxine (Effexor)\]
  * Tricyclic antidepressant (TCA) \[e.g., amitriptyline, nortriptyline, imipramine, and desipramine (Norpramin, Pertofrane)\]
* Have a score between 3 and 6, inclusive, on the Michigan Neuropathy Screening Instrument (MNSI) Part b
* Have a minimum score of 6 on the NTSS-6 at Screening
* Have negative urinalysis for drugs of abuse, such as amphetamines, barbiturates, cannabinoids, cocaine, or opiates
* Have a negative urine pregnancy test at Screening if female and of childbearing potential
* If female, must be either of nonchildbearing potential (surgically sterile or 2 years postmenopausal) or agree to use two methods of effective contraception such as hormonal contraception, intrauterine device or other mechanical contraception device, or condom plus spermicide during the subject's participation
* If male, must be surgically sterile or agree to use two methods of effective contraception such as condom plus spermicide during the subject's participation
* Have the ability to understand the requirements of the study, have provided written informed consent as evidenced by signature on an informed consent form (ICF) approved by an institutional review board (IRB), and agree to abide by the study restrictions and return to the site for the required assessments
* Have provided written authorization for use and disclosure of protected health information

Exclusion Criteria:

* Be pregnant or lactating
* Have a history of amputation, skin ulceration, and/or active Charcot of either foot
* Have a history of previous surgery involving the spine or lower extremity, with residual symptoms of pain or difficulty with movement
* Have Crohn's disease or a history of any type of bariatric surgery or any surgical resection of all or part of the stomach, duodenum, jejunum, and/or ileum. (Previous surgical resections of the colon that spared the stomach, duodenum, jejunum and ileum are allowed.)
* Have a history of surgery or hospitalization within 2 months prior to Screening or planned hospitalization at any time during the study
* Be taking systemic corticosteroids within 2 months prior to Screening, opiates or tramadol hydrochloride within 6 weeks prior to Screening, and/or immunosuppressives, or receiving radiotherapy within 6 months prior to Screening
* Be taking more than one anticonvulsant, serotonin-norepinephrine reuptake inhibitor (SNRI), or tricyclic antidepressant (TCA)
* Have ongoing evidence of peripheral vascular disease, including greater than one nonpalpable pulse on either foot, history of claudication, or history of lower extremity vascular bypass surgery or angioplasty
* Have circulating glycated hemoglobin (HbA1c) exceeding 11% at Screening
* Have an estimated glomerular filtration rate (eGFR) less than or equal to 40 ml/min using the Modification of Diet in Renal Disease (MDRD) formula at Screening or have end-stage renal disorder requiring hemodialysis
* Have uncontrolled hypertension defined as sustained systolic blood pressure (SBP) greater than 200 mmHg or diastolic blood pressure (DBP) greater than 110 mmHg at screening
* Have lung disease (uncontrolled asthma or shortness of breath) within 2 months prior to Screening
* Use of any of the following supplements within 6 weeks before Screening: evening primrose oil, vitamin B12 injection, greater than 10 mg of vitamin B6, or greater than 800 µg of folate
* Have previously failed two or more prior therapies for painful DPN
* Currently abusing alcohol or drugs or have a history of such abuse within the past 3 years. (Alcohol abuse is defined as more than 2 drink units per day for women and more than 3 drink units per day for men. One drink unit is defined as 1.5 oz \[45 mL\] of distilled spirits, 5 oz \[150 mL\] of wine, or 12 oz \[360 mL\] of beer.)
* Have any nondiabetic cause of peripheral neuropathy
* Have a history of documented lumbar nerve entrapment or symptoms suggestive of a lumbar nerve entrapment
* Have a history of systemic lupus erythematosis, rheumatoid arthritis, Sjögren's syndrome, or mixed connective tissue disease
* If receiving thyroid replacement therapy, should be on a stable dose for at least 6 weeks prior to Screening
* Have a history of a positive HIV test or active Hepatitis B or C infection.
* Have a history or presence of malignancy within 10 years prior to Screening except for basal or squamous cell carcinoma of the skin. Records to be submitted to Pamlab for review and approval to randomize.
* Have prior use of or intolerance to Metanx® or any of its active ingredients
* Have been dosed or used a medical device in another investigational trial within 60 days prior to Screening.
* Have any clinically significant existing medical, psychiatric, or nonmedical condition that in the opinion of the investigator places the subject at undue risk, prevents compliance with the study protocol, or potentially jeopardizes the quality of the data to be generated

Primary outcomes:
measure: Change in plasma methylmalonic acid (MMA) levels
timeFrame: 16 weeks
Secondary outcomes:
measure: Change in plasma 5-methyltetrahydrofolate levels
timeFrame: 16 weeks
measure: Change in plasma vitamin B6 levels
timeFrame: 16 weeks
measure: Change in plasma vitamin B12 levels
timeFrame: 16 weeks
measure: Change in urine microalbumin/creatinine ratio
timeFrame: 48 weeks
measure: Change in epidermal nerve fiber density
timeFrame: 48 weeks
measure: Change in neuropathic disability as measured by the Michigan Neuropathy Screening Instrument part B
timeFrame: 48 weeks
measure: Change in neuropathic symptoms as measured by the Neuropathy Total Symptom Score-6questionnaire(NTSS-6)
timeFrame: 16 weeks
measure: Change in neuropathic symptoms as measured by the Neuropathy Total Symptom Score-6 questionnaire (NTSS-6)
timeFrame: 48 weeks
Other outcomes:
Locations:
city: Mobile
country: United States
facility: Coastal Clinical Research, Inc.
state: Alabama
city: Phoenix
country: United States
facility: Arizona Research Center
state: Arizona
city: Little Rock
country: United States
facility: Clinical Trials, Inc.
state: Arkansas
city: Long Beach
country: United States
facility: Collaborative Neuroscience Network, LLC
state: California
city: San Francisco
country: United States
facility: Center for Clinical Research, Inc.
state: California
city: New London
country: United States
facility: Coastal Connecticut Research, LLC
state: Connecticut
city: Bradenton
country: United States
facility: Meridien Research
state: Florida
city: Brandon
country: United States
facility: PAB Clinical Research
state: Florida
city: New Port Richey
country: United States
facility: Suncoast Clinical Research, Inc.
state: Florida
city: Ocala
country: United States
facility: Renstar Medical Research
state: Florida
city: Palm Harbor
country: United States
facility: Suncoast Clinical Research
state: Florida
city: Wesley Chapel
country: United States
facility: Florida Medical Clinic
state: Florida
city: Johns Creek
country: United States
facility: North Chattahoochee Family Physicians, LLC
state: Georgia
city: Bossier City
country: United States
facility: Willis-Knighton Physician Network / WKB Family Medicine Associates
state: Louisiana
city: New Orleans
country: United States
facility: Tulane University School of Medicine
state: Louisiana
city: Dayton
country: United States
facility: Urgent Care Specialists, LLC dba Hometown Urgent Care & Occupational Health
state: Ohio
city: Philadelphia
country: United States
facility: CRI Lifetree
state: Pennsylvania
city: Tullahoma
country: United States
facility: Trinity Clinical Research, LLC
state: Tennessee
city: Austin
country: United States
facility: FutureSearch Trials of Neurology, L.P.
state: Texas
city: Houston
country: United States
facility: Centex Studies Inc.
state: Texas
city: Houston
country: United States
facility: Pioneer Research Solutions, Inc.
state: Texas
city: San Antonio
country: United States
facility: Endeavor Clinical Trials, PA
state: Texas
city: Schertz
country: United States
facility: Northeast Clinical Research of San Anotnio, LLC
state: Texas
city: Waxahachie
country: United States
facility: ClinPoint Trials, LLC
state: Texas
city: Norfolk
country: United States
facility: Strelitz Diabetes Center
state: Virginia
Study officials:
affiliation: Beth Israel Deaconess Medical Center
name: Roy Freeman, MD
role: PRINCIPAL_INVESTIGATOR
References: