Clinical trial NCT02280408: Safety and Immunogenicity of Prime-Boost Vesicular Stomatitis Virus (VSV) Ebola Vaccine in Healthy Adults (V920-002)
Official title: A Phase 1 Randomized, Double-Blind, Placebo Controlled, Dose-Escalation Study to Evaluate the Safety and Immunogenicity of Prime-Boost VSV Ebola Vaccine in Healthy Adults
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE1
Conditions: Ebola Viruses
Lead sponsor: Merck Sharp & Dohme LLC
Sponsor class: INDUSTRY
Collaborators: name: National Institute of Allergy and Infectious Diseases (NIAID)
name: BioProtection Systems Corporation
First posted: 2014-10-31
Enrollment: 39
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: Ebola virus has infected and killed people, mostly in Africa. In 2014, the Zaire ebolavirus (ZEBOV) has affected several thousand people. There is no approved effective way to treat or prevent Ebola. Researchers are trying to develop a vaccine for it. This is a study of the anti-Ebola vaccine vesicular stomatitis virus (VSV) ZEBOV (V920; BPSC-1001) to see if it is safe and to see how it affects people's immune system.

Detailed description: Between 1994 and the present, there have been many Ebola virus (EBOV) outbreaks affecting mostly central Africa. However, the 2014 West African outbreak significantly exceeds all previous outbreaks in geographic range, number of individuals affected and in disruption of typical activities of civil society.

This is a Phase 1 safety and tolerability study to evaluate a novel vaccine to Ebola using a live VSV replacing the gene encoding the G envelope glycoprotein with the gene encoding the envelope glycoprotein from the Zaire strain of Ebola (VSVΔG-ZEBOV also known as V920 and BPSC-1001).

Eligibility criteria: INCLUSION CRITERIA:

* Healthy male or females, ages 18 to 65 (inclusive) at the time of screening
* Females of childbearing potential and all males, must be willing to use effective methods of contraception, from at least 14 days prior to vaccination through Day 56 which would include:

  * Oral contraceptives, either combined or progestogen alone
  * injectable progestogen
  * implants of etonogestrel or levonorgestrel
  * oestrogenic vaginal ring
  * percutaneous contraceptive patches
  * intrauterine device or intrauterine system
  * male partner sterilization
  * male condom combined with a spermicide
* Must be willing to minimize blood and body fluid exposure of others for at least 7 days after vaccination, which includes:

  * Use of effective barrier prophylaxis, such as latex condoms, during any sexual interaction (regardless of childbearing status or sexual orientation)
  * Avoiding the sharing of needles, razors, eating utensils, drinking from the same cup, or toothbrushes
  * Avoiding open-mouth kissing
* Must be willing to forgo blood donation for one year
* Must agree not to enroll in another study of an investigational agent prior to completion of Day 56 and not participate in an investigational vaccine study until the last required protocol visit on Day 365
* Ability to provide informed consent

EXCLUSION CRITERIA:

FACTORS THAT INCREASE RISK TO THE SUBJECT:

* Clinically significant medical condition, physical examination findings, clinically significant abnormal laboratory results, or past medical history with clinically significant implications for current health. A clinically significant condition or process includes but is not limited to:

  * A process that would affect the immune response
  * A process that would require medication that affects the immune response
  * Any contraindication to repeated injections or blood draws
  * A condition that requires active medical intervention or monitoring to avert grave danger to the participant's health or well-being during the study period
  * A condition or process for which signs or symptoms could be confused with reactions to vaccine
  * Any condition specifically listed among the exclusion criteria below
  * Active malignancy
  * Asplenia
  * History of Guillain-Barré Syndrome
  * History of neurological or neuropsychiatric disorder that may either increase risk (history of encephalitis, narcolepsy, stroke, depression, bipolar disorder, seizure, etc.) or could interfere with the assessment of safety (e.g., frequent headaches)
  * History of autoimmune disease
  * History of hemoglobinopathy or a coagulopathy
* Women who are breast-feeding
* Positive urine or serum pregnancy test
* Abnormal chemistry panel; defined as:

  * Defined as any Grade 3 or greater toxicity (regardless of clinical significance) by the toxicity table
  * Evaluating only creatinine, alanine aminotransferase, aspartate aminotransferase, total bilirubin, and estimated glomerular filtration rate
* Abnormal complete blood count (CBC) defined as:

  * Defined as any Grade 3 or greater toxicity (regardless of clinical significance) by the toxicity table
  * Evaluating only the white blood cell (WBC), hemoglobin, hematocrit, and platelets
* Abnormal urinalysis defined as:

  * Defined as any Grade 3 or greater toxicity (regardless of clinical significance) by the toxicity table
  * Evaluating red blood cells (RBC), protein, and glucose only
* Positive serology for hepatitis B surface antigen
* Positive serology for hepatitis C
* Positive serology for human immunodeficiency virus (HIV)
* Known allergy to the components of the VSVΔG-ZEBOV vaccine (V920) vaccine product (VSV, albumin, tris)
* History of severe local or systemic reactions to any vaccination or a history of severe allergic reactions

FACTORS THAT MAY LIMIT VSV REPLICATION OR MAKE INTERPRETATION OF IMMUNOGENICITY DIFFICULT:

* History of prior infection with a filovirus or prior participation in a filovirus vaccine trial
* Veterinarian or ranchers exposed to livestock known to be infected with VSV
* History of prior infection with VSV or receipt of a VSV vectored vaccine

FACTORS THAT WOULD INCREASE RISK TO OTHERS DUE TO VSV VIRAL SHEDDING:

* Is a healthcare worker who will have direct contact with patients within 14 days of each vaccination
* Is an animal care worker, who will have direct contact with animals (livestock or domestic, besides subjects family pet) within 14 days of each vaccination
* Has a house-hold contact (HHC) who is immunodeficient (in the opinion of the investigator), pregnant, has an unstable medical condition, or is under the age of 5 years
* Is a childcare worker who has direct contact with children 5 years of age or younger

FACTORS THAT COULD IMPAIR INTERPRETATION OR EXECUTION OF THE STUDY:

* Receipt of any investigational drug within 5 half-lives or 30 days, whichever is longer, prior to study drug administration (i.e., Day 0)
* Receipt of licensed vaccines 14 days before the planned study immunization
* Receipt of immunoglobulins and/or any blood products within the 120 days preceding study entry or that are planned during the study period
* Immunosuppressive medications received within 168 days before first vaccination. (Not including: \[1\] corticosteroid nasal spray for allergic rhinitis; \[2\] topical corticosteroids for mild, uncomplicated dermatitis; or \[3\] oral/parenteral corticosteroids given for non-chronic conditions not expected to recur \[length of therapy 10 days or less with completion at least 30 days prior to vaccination(s)\].)
* Allergy treatment with antigen injections within 30 days before first vaccination or that are scheduled through Day 56
* Participants who, in the judgment of the investigator, will be unlikely to comply with the requirements of this protocol

Primary outcomes:
measure: Percentage of Participants With 1 or More Unsolicited AE : Vaccination 1
timeFrame: Up to 28 days post vaccination 1 (From Day 1 up to Day 28)
measure: Percentage of Participants With 1 or More Unsolicited AE : Vaccination 2
timeFrame: Up to 28 days post vaccination 2 (From Day 29 to Day 56)
measure: Percentage of Participants With 1 or More Solicited Systemic Adverse Event (AE) by Severity: Vaccination 1
timeFrame: Up to 14 days post vaccination 1 (From Day 1 up to Day 14)
measure: Percentage of Participants With 1 or More Solicited Systemic AE by Severity: Vaccination 2
timeFrame: Up to 14 days post vaccination 2 (Day 29 up to Day 42)
measure: Percentage of Participants With One or More Serious Adverse Event
timeFrame: Up to Day 56 (Day 1 up to Day 56)
measure: Percentage of Participants With 1 or More Solicited Local Injection-site AE by Severity: Vaccination 1
timeFrame: Up to 14 days post vaccination 1 (Day 1 to Day 14)
measure: Percentage of Participants With 1 or More Solicited Local Injection-site AE by Severity: Vaccination 2
timeFrame: Up to 14 days post vaccination 2 (Day 29 up to Day 42)
measure: Percentage of Participants With Early Discontinuation of Vaccination
timeFrame: Up to Day 28
Secondary outcomes:
measure: Geometric Mean Titers of Zaire Ebolavirus-(ZEBOV)-Specific Immunoglobin G (IgG) Antibodies: Day 28
timeFrame: Day 28
measure: Geometric Mean Titers of ZEBOV-specific IgG Antibodies: Day 56
timeFrame: Day 56 (28 days post vaccination 2)
measure: Geometric Mean Titers of ZEBOV-specific Neutralizing Antibodies: Day 28
timeFrame: Day 28 (28 days post vaccination 1)
measure: Geometric Mean Titers of ZEBOV-specific Neutralizing Antibodies: Day 56
timeFrame: Day 56 (28 days post vaccination 2)
measure: Percentage of Participants Who Seroconvert: Day 28
timeFrame: Day 28 (28 days post vaccination 1)
measure: Percentage of Participants Who Seroconvert: Day 56
timeFrame: Day 56 (28 days post vaccination 2)
measure: Percentage of Participants With Viremia on Day 3 and Day 7: Vaccination 1
timeFrame: Day 3 and Day 7 post vaccination 1
measure: Percentage of Participants With Viremia on Day 3 and Day 7: Vaccination 2
timeFrame: Day 3 and Day 7 post vaccination 2 (Day 31 and Day 35)
Other outcomes:
Locations:
Study officials:
affiliation: Merck Sharp & Dohme LLC
name: Medical Director
role: STUDY_DIRECTOR
References:
citation: Coller BG, Blue J, Das R, Dubey S, Finelli L, Gupta S, Helmond F, Grant-Klein RJ, Liu K, Simon J, Troth S, VanRheenen S, Waterbury J, Wivel A, Wolf J, Heppner DG, Kemp T, Nichols R, Monath TP. Clinical development of a recombinant Ebola vaccine in the midst of an unprecedented epidemic. Vaccine. 2017 Aug 16;35(35 Pt A):4465-4469. doi: 10.1016/j.vaccine.2017.05.097. Epub 2017 Jun 21.
citation: Regules JA, Beigel JH, Paolino KM, Voell J, Castellano AR, Hu Z, Munoz P, Moon JE, Ruck RC, Bennett JW, Twomey PS, Gutierrez RL, Remich SA, Hack HR, Wisniewski ML, Josleyn MD, Kwilas SA, Van Deusen N, Mbaya OT, Zhou Y, Stanley DA, Jing W, Smith KS, Shi M, Ledgerwood JE, Graham BS, Sullivan NJ, Jagodzinski LL, Peel SA, Alimonti JB, Hooper JW, Silvera PM, Martin BK, Monath TP, Ramsey WJ, Link CJ, Lane HC, Michael NL, Davey RT Jr, Thomas SJ; rVSVDeltaG-ZEBOV-GP Study Group. A Recombinant Vesicular Stomatitis Virus Ebola Vaccine. N Engl J Med. 2017 Jan 26;376(4):330-341. doi: 10.1056/NEJMoa1414216. Epub 2015 Apr 1.