Role of Topical Putrescine (Fibrostat) for Prevention of Hypertrophic Scars in Mammoplasty Patients

University of Manitoba

Status and phase: Completed; Phase 3

Conditions: Hypertrophic Scar

Treatments: Drug: 10% Urea cream; Drug: 1,4-Diaminobutane

Study type: Interventional

Funder types: Other

Identifiers

NCT03376620

B2008:134

Details and patient eligibility

About

Linked to previous Clinical Trial E92:069 in which biochemical effect of 1,4 diaminobutane was studied in human scar harvested at revision surgery after a 12 week application. Analytical data was collected in this phase of the work completed in 1999. This was then followed by clinical correlation in a scar prevention model with topical application of 1,4 diaminobutane for 12 weeks and measuring duredness , as well photographic and POSAS score data for quality of scar formation.

Full description

In this study, patients were "randomized" into one of 2 study groups described below. They agreed to being treated on the right side or the left with active agent, while the other side was to receive inactive cream. The active molecule is called Fibrostat or 1,4 diaminobutane and is a naturally occurring inhibitor of scar formation. The inactive jar contains the vehicle alone without Fibrostat.

The patients received both cream types to be applied to the appropriate side assigned by the randomization process, one numbered jar each per breast in the order and amount as explained in detail by the patient educator. The cream was applied daily and in the same order, one jar for the right and the other jar for the left consistently. The randomization was performed at the factory with an assigned number recorded on each jar and the jar contents listed and recorded with its assigned number. Each jar of active cream is randomly assigned with another jar of inactive cream to form a pair which were both given to the patient. The cream in both jars looks and smells the same. Neither the patient nor the study doctor knew which breast as receiving the active agent. In an emergency, this information was to be made available.

Participation in the study was for 12 weeks. the patients were seen for photos and scar testing using a painless surface testing device called a Rex® durometer at 1, 3, 6, and 12 weeks post op.

The researcher could decide to take patients off this study if a patient were to develop a rash during the run-in period of 1 week from the cream on either side.

The patients could stop participating at any time. However, this was usually accompanied by a valid reason such as lack of transportation to regular follow up appointments. No serious effects were seen and the only patients to stop participation in the study except 1 which was lost to follow-up could be accounted for. The results were revealed to patients at the completion of the 12 week trial.

Enrollment: 56 patients

Sex: Female

Ages: 18 to 80 years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria: Undergoing breast reduction surgery -

Exclusion Criteria: Not pregnant or lactating

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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56 participants in 2 patient groups

10% Urea cream

Sham Comparator group

Description:

Opposite breast scars treated OD at hs simultaneously using sham 10% Urea cream

Treatment:

Drug: 10% Urea cream

Active cream with 1,4 diaminobutane

Active Comparator group

Description:

Other breast scar treated daily with active cream with 1,4 diaminobutane topically OD at hs

Treatment:

Drug: 1,4-Diaminobutane