Clinical trial NCT02594254: Phase 2 Study to Evaluate the Microbiology and Safety of C16G2 Administered to Adult and Adolescent Dental Subjects
Official title: A Phase 2, Double-Blind, Placebo-Controlled and Open-Label Multi-Center Study to Evaluate the Microbiology and Safety of C16G2 Administered in Multiple Oral Gel Doses to Adult and Adolescent Dental Subjects
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
Conditions: Dental Caries
Lead sponsor: Armata Pharmaceuticals, Inc.
Sponsor class: INDUSTRY
Collaborators: name: Vantage Data Designs, Inc.
name: SynteractHCR
name: Agility Clinical, Inc.
First posted: 2015-11-03
Enrollment: 135
Sex: ALL
Minimum age (years): 12
Maximum age (years): 75
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to evaluate if C16G2 Gel administered over a certain period of time either with a toothbrush or a custom dental tray can effectively kill bacteria in the mouth that cause dental cavities.

Detailed description: This multi-center, multiple-arm study will evaluate the microbiological activity and safety of C16G2 Gel in male and female dental subjects, 12 to 75 years of age. The study will be conducted in a randomized, double-blind, placebo-controlled and open-label manner and enroll adolescent (12-17 years of age) and adult subjects (18-75 years of age).

A total of approximately 128 study subjects will be enrolled into up to 7 study arms. Study drug (C16G2 Gel or Placebo) will be administered via manual brush gel application (MBGA) or tray gel application (TGA). Two C16G2 concentrations will be evaluated. Four study arms will be conducted in a double blind manner, with a treatment allocation ratio of 4:1 (C16G2:Placebo), three study arms will be conducted in an open-label manner. Before dosing, eligible subjects will undergo professional dental prophylaxis on Day 0. Clinic visits for all study arms will include Visit 1 (Screening/Days -21 to 0), and a varying number of dosing and follow-up visits.

Eligibility criteria: Inclusion Criteria:

1. Males and females, 12-75 years of age, inclusive, at the time the Assent and/or Informed Consent Form is signed
2. Female subjects of childbearing potential, defined as not surgically sterile or at least two (2) years postmenopausal, must agree to use one of the following forms of contraception from screening through the last study visit: hormonal (oral, implant, or injection) begun \>30 days prior to screening; barrier (condom, diaphragm, or cervical cap with spermicide); intrauterine device (IUD). Acceptable contraceptive options may also include abstinence, relationship with same sex partner or partner who has had a vasectomy at least six (6) months prior to the screening visit
3. Male subjects only: willing to use contraception or abstain from sexual activity beginning with the first exposure to study drug and continuing until discharged from the study due to completion or Early Termination
4. Healthy, as determined by the Investigator (in consultation with the Medical Monitor, as needed), based on medical and dental history, concurrent illnesses, laboratory results, concomitant medications, oral cavity assessment, and targeted physical examination (extraoral, head and neck) during Screening Note: Subjects on a stable dose of medication may be eligible for screening and will be assessed by the Medical Monitor on a case-by-case basis.
5. Have a minimum of 12 bicuspids and molars with a minimum of 8 molars and bicuspids NOT having restorations, crowns, sealants
6. Demonstrated ability to expectorate ≥2 mL of stimulated saliva in 5 minutes
7. Have a salivary S. mutans of 1.0 x 10\^5 colony forming units (CFUs)/mL or greater at Screening using mitis salivarius-bacitracin (MSB) agar plating
8. Willing to refrain from using non-study dentifrice and other non-study oral care products (oral care rinses, fluoride products, etc.) during the study
9. Willing to postpone elective dental procedures (e.g., dental cleanings) between Screening and final post-treatment visit (End of Study or Early Termination)
10. Willing and able to comply with oral hygiene and diet instructions
11. Has dentition adequate for custom dental tray gel application
12. Able to understand and sign the Assent and/or Informed Consent Form prior to initiation of study procedures
13. Able to communicate with the Investigator/study center personnel, understand and comply with the study requirements, and willing to return for protocol-specified visits at the appointed times

Exclusion Criteria:

1. Advanced periodontal disease
2. Active caries lesion(s) within 30 days prior to study drug administration (confirmed by comprehensive caries examination including standard radiographs if deemed necessary by the Investigator) Note: Subjects presenting with insipient, non-cavitated lesion(s) are not excluded
3. Medical condition (e.g., artificial heart valve, history of infective endocarditis, cardiac transplant with valvular dysfunction, congenital heart disease or total joint replacement) for which antibiotics are recommended prior to dental visits and/or procedures
4. Pathologic lesions of the oral cavity (suspicious or confirmed)
5. Full dentures or orthodontic appliances, e.g., braces; Note: partial dentures, removable retainers and night guards are not excluded, provided that they are cleaned regularly throughout the duration of the study.
6. Use of systemic antibiotics, topical oral antibiotics, or use of other drugs, which in the opinion of the Investigator could influence the study outcome, within 30 days prior to Screening and throughout the entire study.
7. Medical history indicating the woman is pregnant, breastfeeding/lactating or has a positive urine pregnancy test
8. Participation in a clinical trial or receipt of a non-FDA approved therapy within 30 days prior to study drug administration (depending on the specifics, participation in an observational study is not necessarily excluded)
9. Prior participation in a C16G2 clinical trial and known to have received C16G2 active gel or mouth rinse Note: Placebo subjects are not excluded
10. Presence of any condition or concurrent illness, which in the opinion of the Investigator, would compromise normal immune function (e.g., diabetes, rheumatoid arthritis, lupus, liver disease, organ transplant, etc.), interfere with the use of study dentifrice and oral care products, or interfere with the ability to comply with study requirements, or jeopardize the safety of the subject or the validity of the study results

Primary outcomes:
measure: Antimicrobial Activity of C16G2
timeFrame: Evaluated over up to 5 months
measure: Total Oral Bacterial Levels
timeFrame: Evaluated 7 days post last study drug administration
measure: Safety of C16G2 Gel Administrations assessed by performing targeted physical examinations, oral cavity exams, taking vital signs and collection of adverse events
timeFrame: Up to 7 days post last study drug administration
Secondary outcomes:
Other outcomes:
Locations:
city: Imperial Beach
country: United States
facility: Imperial Beach Family Dentistry
state: California
city: Indianapolis
country: United States
facility: Indiana University School of Dentistry
state: Indiana
city: Boston
country: United States
facility: Tufts University
state: Massachusetts
city: Kalispell
country: United States
facility: John F. Pittaway, DMD
state: Montana
city: Kalispell
country: United States
facility: Plaza West II Dental Group
state: Montana
city: New York
country: United States
facility: New York University College of Dentistry
state: New York
city: Greenville
country: United States
facility: East Carolina University
state: North Carolina
city: Philadelphia
country: United States
facility: University of Pennsylvania School of Dental Medicine
state: Pennsylvania
city: Dallas
country: United States
facility: Texas Baylor College of Dentistry
state: Texas
city: Irving
country: United States
facility: Anthony Henegar, DDS, PA
state: Texas
Study officials:
affiliation: NYU Langone Health
name: Mark Wolff, DDS, PhD
role: PRINCIPAL_INVESTIGATOR
References: