A Study for Safety and Efficacy Evaluation of Various Doses of STP705 in Reducing Keloid Recurrence

Keloid Clinical Trial

Official title:

A Phase 2, Multi-Center, Randomized, Multiple Arm, Controlled Pilot Study to Evaluate the Safety and Efficacy of Various Doses of STP705 in Reducing Post- Keloidectomy Keloid Recurrence

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04844840
• Other study ID #: SRN-705-007
• Status: Completed
• Phase: Phase 2
• Start date: April 29, 2021
• Est. completion date: May 17, 2023

Study information

• Verified date: March 2024
• Source: Sirnaomics
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Phase 2, randomized, double-blind, multiple arm, controlled study to evaluate safety & efficacy of various doses of STP705 in reducing post Keloidectomy keloid recurrence.

Description:

The objective of this study isto assess the safety, tolerability, and efficacy of various doses of STP705 and placebo via intradermal injection into the keloid excision site, to prevent the recurrence of keloids following their excision. A total of up to 60 adult subjects will be enrolled. One eligible qualifying keloid will be excised. The subjects will be randomized to receive STP705, placebo or SOC alone (no injection) for treatment of the keloidectomy excision suture line. To be eligible, keloid scar(s) must have been present for at least one year with a target keloid area on the trunk or extremity (non-peri-orbital/-anogenital/-scalp), measures ≥0.30cm2, and be suitable for surgical excision which will result in a single wound no greater than 7cm long. The study is divided into 3 phase: screening phase (4 weeks), Treatment phase (up to 4 weeks +/- allowed windows), Follow up phase (up to 52 weeks +/- allowed windows).

Recruitment information / eligibility

• Status: Completed
• Enrollment: 29
• Est. completion date: May 17, 2023
• Est. primary completion date: May 17, 2023
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Male or female =18 years of age, inclusive having at least one keloid scar.

2. Female subjects of child-bearing potential must agree to the use of an effective method(s) of contraception beginning at or before the screening visit until one month after administration of the final study dose. For the purposes of the protocol, highly effective method(s) of contraception will be defined as consistently and correctly used implants, injectables, combined oral contraceptives, sexual abstinence or a vasectomized partner.

3. The keloid scar(s) must have been present for at least one year with a target keloid area on the trunk or extremity (non-peri-orbital/-anogenital/-facial/-scalp), measures =0.30cm2, and be suitable for surgical excision which will result in a single wound no greater than 7cm long.

4. Able and willing to give written informed consent.

5. Willing to comply with the follow up schedule for 12 months.

6. Medically healthy with no clinically significant medical history, physical examination, laboratory profiles, or vital sign abnormalities as deemed by the PI.

Exclusion Criteria:

1. Prior treatment of the keloid scar in the previous 6 weeks.

2. The keloid scar must not have undergone prior surgical excisions (laser, cryotherapy or surgery).

3. The keloid scar must not have undergone prior radiation treatment.

4. Pregnant, lactating, or planning to become pregnant during the course of the study.

5. Advanced or poorly controlled diabetes.

6. Active local infection at the treatment site and/or systemic infection that would in the opinion of the Investigator affect the treatment site.

7. Any medical or surgical condition that will interfere with required study activities or assessments or that make the study treatments contraindicated in the opinion of the study Investigator.

8. Unwilling to refrain from use of any other scar treatment therapy/scar improving product, during the study.

9. Regular, continuous use of systemic corticosteroid therapy or topical corticosteroid use in the area to be treated.

10. Current participation or participation within the last 1 months in the study of an investigational drug, device, or biologic.

11. Unable or unwilling to follow post-operative instructions.

12. Mentally or legally incapacitated or has significant emotional problems at the time of screening visit or expected during the conduct of the study.

13. History or presence of hypersensitivity or idiosyncratic reaction to the study drug or related compounds, or drug product excipients.

Related Conditions & MeSH terms

• Keloid
• Recurrence

Intervention

Drug:
• STP705
STP705 is composed of two siRNA oligonucleotides, targeting TGF-ß1 and COX-2 mRNA, respectively

Other:
• Placebo
Saline

Locations

Country	Name	City	State
United States	Center for Clinical and Cosmetic Research	Aventura	Florida
United States	Schweiger Dermatology	Hackensack	New Jersey
United States	Investigate MD	Scottsdale	Arizona

Sponsors (1)

Lead Sponsor	Collaborator
Sirnaomics

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Rate of Recurrence	Rate of recurrence in subjects undergone surgery alone (with or without placebo) vs surgery and STP705	12 months
Secondary	Change of Keloid volume/size	Change in size of post excision keloid from baseline by volumetric measurements using quantitative imaging	12 months
Secondary	Change of Keloid size	Change of Keloid scar appearance from baseline evaluated by caliper	12 months
Secondary	Change of Keloid scar appearance	Change of Keloid scar appearance from baseline evaluated by POSAS	12 months
Secondary	Change in DLQI score	The Dermatology Life Quality Index (DLQI) is a self-reported 10-item questionnaire assessing the impact of skin disease on the patient over the previous week. The items cover symptoms, treatment, activity limitations, and emotional reactions to having a skin disease. Nine items have four response options: "Not at all", "A little", "A lot", and "Very much", whereas item 7 first asks whether work or study has been prevented and then (if "No") to what degree the skin condition has been a problem at work/study ("A lot", "A little", or "Not at all"). Eight of the items also have a "Not relevant" option that is scored "0", indicating no problem. Individual item scores are summed to derive a total DLQI score that can range from 0 to 30, with higher scores indicating worse health- related quality of life (HRQL).	12 months
Secondary	Change in mVSS score	The modified Vancouver Scar Scale (mVSS) performs a comprehensive measurement rating characteristic of pigmentation, vascularity, pliability, and height. For each subject, a total Vancouver score was determined by summing the scores of the four individual parameters to generate a score ranging from 0 to 15 points, with higher scores indicating worse score severity.	12 months