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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02553265
Other study ID # 13-00065
Secondary ID FD-R-004772
Status Completed
Phase Phase 2
First received
Last updated
Start date September 2015
Est. completion date May 10, 2019

Study information

Verified date January 2022
Source NYU Langone Health
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The overall study objectives are to determine whether carbidopa (Lodosyn®) is safe and well tolerated and to assess whether it can inhibit catecholamine-induced paroxysmal hypertension and normalize or reduce the exaggerated blood pressure variability in patients with familial dysautonomia (FD, also called hereditary sensory and autonomic neuropathy type III or Riley-Day syndrome). Funding Source- FDA OOPD.


Description:

The investigators propose to perform a double-blind randomized trial with a cross over design to compare high dose (600 mg/day) and low dose (300 mg per day) carbidopa blockade with placebo. Patients will be randomly assigned to a high-dose/low-dose/placebo sequence, lowdose/placebo/high-dose sequence or placebo/high-dose/low-dose sequence. Participants will remain on each treatment period for 28-days. Aim 1: To evaluate the safety and tolerability of carbidopa in FD patients with particular emphasis on the orthostatic fall in blood pressure. Aim 2: As proof of concept, examine the hemodynamic effects of carbidopa and determine its effects on norepinephrine production, BP variability and paroxysmal hypertension. Aim 3: In a dose finding study, compare the effects of low (300 mg/day) and high (600 mg/day) dose carbidopa blockade vs. placebo on BP variability and paroxysmal hypertension.


Recruitment information / eligibility

Status Completed
Enrollment 22
Est. completion date May 10, 2019
Est. primary completion date May 10, 2019
Accepts healthy volunteers No
Gender All
Age group 10 Years to 60 Years
Eligibility Inclusion Criteria: - Male or female patients with familial dysautonomia (FD) age 10 or older - Unstable blood pressure, defined as: - Systolic BP standard deviation >15 mmHg - Or coefficient of variation >15% - Or documented episodic hypertensive peaks (>140mmHg) - Confirmed diagnosis of FD (genetic testing) - Providing written informed consent (or ascent) to participate in the trial - Ability to comply with the requirements of the study procedures. Exclusion Criteria: - Patients taking monoamine oxidase (MAO)-inhibitors - Patients taking: metoclopramide, domperidone, risperidone or other dopamine blockers - Patients taking tricyclic antidepressants - Patients taking neuroleptic drugs (haloperidol and chlorpromazine) - Patients with a known hypersensitivity to any component of this drug. - Patients with atrial fibrillation, angina or significant ECG abnormality - Patients with significant pulmonary, cardiac, liver, renal (creatinine >2.0 mg/ml) - Patients who have a significant abnormality on clinical examination that may, in the investigator's opinion might jeopardize their healthy participating in this trial. - Women who are pregnant or lactating.

Study Design


Related Conditions & MeSH terms


Intervention

Drug:
Carbidopa Low-Dose
300 mg/day
Other:
Placebo
A placebo containing an inert substance, in capsule form that does not contain an active drug ingredient.
Drug:
Carbidopa High-Dose
600 mg/day

Locations

Country Name City State
United States NYU Langone Medical Center, Dyautonomia Center, Suite 9Q New York New York
United States NYU Medical Center New York New York

Sponsors (1)

Lead Sponsor Collaborator
NYU Langone Health

Country where clinical trial is conducted

United States, 

References & Publications (6)

Kaufmann H, Malamut R, Norcliffe-Kaufmann L, Rosa K, Freeman R. The Orthostatic Hypotension Questionnaire (OHQ): validation of a novel symptom assessment scale. Clin Auton Res. 2012 Apr;22(2):79-90. doi: 10.1007/s10286-011-0146-2. Epub 2011 Nov 2. — View Citation

Norcliffe-Kaufmann L, Axelrod F, Kaufmann H. Afferent baroreflex failure in familial dysautonomia. Neurology. 2010 Nov 23;75(21):1904-11. doi: 10.1212/WNL.0b013e3181feb283. — View Citation

Norcliffe-Kaufmann L, Axelrod FB, Kaufmann H. Developmental abnormalities, blood pressure variability and renal disease in Riley Day syndrome. J Hum Hypertens. 2013 Jan;27(1):51-5. doi: 10.1038/jhh.2011.107. Epub 2011 Dec 1. — View Citation

Norcliffe-Kaufmann L, Martinez J, Axelrod F, Kaufmann H. Hyperdopaminergic crises in familial dysautonomia: a randomized trial of carbidopa. Neurology. 2013 Apr 23;80(17):1611-7. doi: 10.1212/WNL.0b013e31828f18f0. Epub 2013 Apr 3. — View Citation

Norcliffe-Kaufmann LJ, Axelrod FB, Kaufmann H. Cyclic vomiting associated with excessive dopamine in Riley-day syndrome. J Clin Gastroenterol. 2013 Feb;47(2):136-8. doi: 10.1097/MCG.0b013e3182582cbf. — View Citation

Palma JA, Norcliffe-Kaufmann L, Fuente-Mora C, Percival L, Mendoza-Santiesteban C, Kaufmann H. Current treatments in familial dysautonomia. Expert Opin Pharmacother. 2014 Dec;15(18):2653-71. doi: 10.1517/14656566.2014.970530. Epub 2014 Oct 17. Review. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Number of Participants Who Reported Adverse Events Related to Study Drug Adverse events defined as: a change in a patient's baseline condition including intercurrent illnesses irrespective of the relationship to carbidopa treatment. This will be monitored primarily with phone calls at weekly intervals. In addition, patients will be asked about adverse events while at the office. Patients will also fill a daily diary with a specific prompts to note any adverse events. Up to 90 days
Primary Number of Participants With Significant Changes in Body Mass That Resulted in Discontinuation From the Study. Body mass measured in kg Up to 90 days
Primary Number of Participants With Abnormal Electrocardiographic Interval Patterns Clinically significant changes in the intervals of characteristic electrocardiographic patterns Up to 90 days
Primary Average Systolic Blood Pressure Variability (Daytime) Patients with FD undergo ambulatory BP monitoring while keeping a detailed log of their activities (sleep/meal-times/medications/posture/symptoms). Variability in blood pressure overtime will be measured by the standard deviation during awake hours up to Week 14
Primary Highest Systolic Blood Pressure Maximum blood pressure captured on 24-h ambulatory monitoring Day 1 of treatment period
Primary Systolic Blood Pressure SBP measured in the seated position up to Week 14
Primary Heart Rate Heart rate in the seated position up to Week 14
Primary Number of Participants Who Displayed Clinical Significant Laboratory Values on CBC or Metabolic Panel Clinically significant laboratory values include complete blood count (CMC) and metabolic panel related to treatment with carbidopa Up to 90 days
Primary Number of Participants Who Displayed Clinically Significant Values in Urine Safety Parameters Clinically significant values on urinalysis, urine safety parameters related to treatment with carbidopa Up to 90 days
Secondary Severity of Hypotension During an Active Stand Test Lowest blood pressure captured during 3 minutes of standing up to Week 14
Secondary Number of Participants Who Reported Worsening of OH Symptoms or Dropped Out Because of Worsening OH While on Active Study Drug Up to 90 days
Secondary Frequency of Worsening Symptoms Noted in the Patient's Diary A tailored questionnaire to examine symptoms over the treatment period and the used of as needed medications. Each day will have a designated page. Since nausea/vomiting and hypertension occur together in FD we will use a diary consisting of a simplified version of the Rhodes Index 44 symptoms of nausea/retching, with items addressing vomiting/throwing up omitted, as most participants will have had anti-reflux surgery to prevent vomiting (fundoplication), graded on a 5-point scale (appendix 2). The diary will also include space to write down any adverse events on a daily basis. Up to 90 Days
Secondary 24-h Urinary Norepinephrine Excretion Norepinephrine concentration determined from a 24-hour urine sample in a bottle shielded from light containing preservative. Patients will be instructed to refrigerate their sample and bring it on the morning of their visit in a cool bag. up to Week 14
Secondary Coefficient of Systolic BP Variability (Daytime) The measurement of blood pressure variability based on the standard deviation that also takes into account the underlying level of BP. up to Week 14
Secondary Morning Surge in Systolic BP on Awakening From Sleep (24-h) The morning surge will be calculated as the difference between the mean systolic blood pressure during the hour that included the lowest blood pressure during sleep and maximum value detected within 2-h of awakening from sleep up to Week 14
See also
  Status Clinical Trial Phase
Terminated NCT03730519 - UK Registry for Baroreflex Activation Therapy N/A