Study of Itch Control by VLY-686 in Healthy Volunteers After Intradermal Injections of Substance P

Pruritus Clinical Trial

Official title:

A Randomized, Double-Blind, Placebo-Controlled, Four-Way Crossover Study on Itch Control by VLY-686 Administration in Healthy Volunteers After Intradermal Injections of Substance P

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01919944
• Other study ID #: VP-VLY-686-1101
• Status: Completed
• Phase: Phase 1
• First received: August 2, 2013
• Last updated: June 1, 2015
• Start date: August 2013
• Est. completion date: November 2013

Study information

• Verified date: June 2015
• Source: Vanda Pharmaceuticals
• Contact: n/a
• Is FDA regulated: No
• Health authority: Switzerland: SwissmedicUnited States: Food and Drug Administration
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to test whether VLY-686 can prevent or reduce the itch and dermatological reaction observed after healthy volunteers are injected with Substance P in comparison with placebo.

Description:

This is a double-blind, randomized, 4-way crossover, pharmacokinetic and pharmacodynamic (PK/PD) study to compare the cutaneous vasoreactive intensity to intradermal injections of Substance P in healthy volunteers receiving oral doses of 20 mg, 50 mg or 100 mg VLY-686 or a matching placebo. Twelve healthy male subjects satisfying the selection criteria for the study will be enrolled. Each subject will participate in a screening period (up to 21 days prior to dosing), four one-day treatment periods each separated by a 7 (±2 days) day washout period, and an end-of-study evaluation prior to discharge from the study. This protocol also includes an option of subjects administered daily doses of study medication between Periods 3 and 4. The treatment periods will be in a randomized sequence consisting of 1) 20 mg VLY-686, 2) 50 mg VLY-686, 100 mg VLY-686 and 4) placebo. In each of the study periods, Substance P will be injected 5 times: pre-dose (the night before), 2, 4, 8 and 12 hours (± 10 minutes) after study medication administration. A dose of 100 μL of a 2.5 nmol/mL sterile solution of Substance P will be injected each time. Overall, subjects will be administered 1.25 nmol of Substance P in around 24 hours (5 doses). Substance P injections will be given in the volar of the forearm, alternating right and left and avoiding injections in an area adjacent to the area previously injected. The subject's forearm will be covered during and after each injection to avoid potential biases in the scoring of the Verbal Rating Scale (VRS) and Visual Analog Scale (VAS). Additionally, blood samples for VLY-686 pharmacokinetic (PK) analysis will be collected each period at pre-dose, 1, 3, 6, 10, and 24 hours after study medication administration.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 12
• Est. completion date: November 2013
• Est. primary completion date: November 2013
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 45 Years

Eligibility

Inclusion Criteria:

• Males 18 - 45 years of age, inclusive;

• Non-smokers, per medical history, or ex-smokers for a period of =1 year;

• Subjects with Body Mass Index (BMI) of =18.5 and =30 kg/m2 (BMI = weight (kg)/ [height (m)]2);

• Vital signs (in sitting position after 3 minutes of rest) which are within the ranges shown below (inclusive):

• Body temperature between 35.4-37.8 °C;

• Systolic blood pressure between 91-130 mmHg;

• Diastolic blood pressure between 51-90 mmHg;

• Pulse rate between 50-100 bpm;

• Respiratory rate between 10-20 breaths per minute;

• Ability and acceptance to provide written informed consent;

• Willing and able to comply with study requirements and restrictions;

• Subjects must be in good health as determined by past medical history, physical examination, electrocardiogram, clinical laboratory tests and urinalysis.

Exclusion Criteria:

• Past or present history of atopy (atopic dermatitis problems, urticaria, asthma or allergic rhinitis) with no ascertained intolerance to histamine;

• Past or present skin disease;

• Lesions or any skin changes in the forearms in the month prior to the Screening Visit;

• History of neurological diseases;

• Past or present pain-related diseases such as cluster headaches, migraine, or back pain;

• Treatment with all topical cream and ointments including cosmetics applied on the forearm in the 10 days prior to the screening visit;

• Participation in the evaluation of any investigational product for 3 months before this study, calculated from the first day of the month following the last visit of the previous study;

• Exposure (within 2 weeks of the Baseline Visit) to any prescription medication or over-the-counter medication including dietary supplements and/or herbal remedies, except those listed on Section 8.2;

• Exposure (within 4 weeks of the Screening Visit) to any antihistamines, anxiolytics, antidepressants, pain killers including triptanes, neuroleptics, or sleep medications;

• Treatment with any medication known to cause major organ system toxicity (e.g., chloramphenicol or tamoxifen) during the 60 days preceding the Screening Visit;

• Administration of medications containing corticosteroids or adrenocorticotropic hormone in the three months prior to the Screening Visit;

• Electrocardiogram reading considered outside the normal limits by the investigator (e.g. abnormally prolonged QTc corrected by Fridericia's method > 450 msec in males, on ECG tracing). The following conduction abnormalities may confound QTc analysis and should be avoided if possible: PR > 220 msec, 2nd or 3rd degree AV block, intraventricular conduction delay with QRS > 120 msec, left branch bundle block, right branch bundle block or Wolff-Parkinson-White syndrome;

• Blood donation in the last 3 months or donation of at least 1500 mL blood (including this study) within the last year;

• History of liver disease and/or positive for one or more of the following serological results:

• A positive hepatitis C antibody test (anti-HCV);

• A positive hepatitis B surface antigen (HBsAg);

• A positive HIV test result ;

• Not willing to sign the informed consent or not able to understand completely the study objectives or risks;

• Clinically relevant abnormalities in clinical lab or physical assessments performed at the screening visit;

• Lack of sensitivity to Substance P and histamine or sensitivity to saline at the Screening Visit;

• Any other sound medical reason as determined by the clinical Investigator.

• Drug, alcohol, caffeine, tobacco: history of drug, alcohol (>2 drinks/day for males, defined according to USDA Dietary Guidelines 2010), caffeine (>5 cups coffee/tea/day), smokers;

• Diet: abnormal diets (<1600 or >3500 calories/day) or substantial changes in eating habits in the 4 weeks before this study; vegetarians.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Prevention

Related Conditions & MeSH terms

• Pruritus

Intervention

Drug:
• VLY-686
capsules containing either 10 mg or 50 mg VLY-686
• Placebo
Sugar capsule to mimic either VLY-686 10 mg capsule or 50 mg capsule

Locations

Country	Name	City	State
Switzerland	Vanda Investigational Site	Arzo

Sponsors (1)

Lead Sponsor	Collaborator
Vanda Pharmaceuticals

Country where clinical trial is conducted

Switzerland, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Itch severity score on the Verbal Rating Scale		20 minutes after Substance P injection	No
Primary	Itch severity score on the Visual Analog Scale		20 minutes after Substance P injection	No
Secondary	Dose response of VLY-686 and reduction of itch severity		20 minutes after substance P injection	No
Secondary	Number of adverse events in subjects taking VLY-686		24 hours after Substance P injection	Yes
Secondary	Size of injection site erythema		1-20 minutes after Substance P injection	No
Secondary	Number of adverse events in subjects taking placebo		20 minutes after Substance P inection	Yes
Secondary	Size of injection site and urticaria		20 minutes after Substance P injection	No