Dermal Burn Repair

MicroCures is also developing siFi2 as a potential treatment in the area of burn repair.

Data from preclinical studies in pig and mouse burn wound models have consistently demonstrated significantly improved and accelerated repair of burn wounds following treatment with siFi2.

Pig Full Thickness Burn Study

Week 4:

Necrosis scores for siFi2-treated subjects were dramatically lower than placebo and control subjects. This reduction in necrotic progression is believed to allow healing while preventing further deepening and expansion of the original burn wound.

Week 6:

The images below, taken at Week 6, provide clear visual evidence of improved would repair for siFi2-treated subjects as compared to placebo and control.

​Wound Healing at Week 6

Week 8:

  • 39% of siFi2-treated wounds were closed as compared to only 11% for control subjects and 0% for placebo
  • siFi2-treated subjects demonstrated a significantly improved rate of repair as measured by epithelial surface measurements vs placebo (p = 0.0106) and control (p = 0.0012)
  • siFi2-treated subjects demonstrated greater enhancement in mature collagen as compared to placebo and control

​Wound Healing at Week 8: Burns treated with 0.1 ml of each agent at time of injury and every third day thereafter (arrows indicate wound zones)

Mouse Full Thickness Burn Studies

When compared to control subjects, those treated with siFi2 demonstrated:

  • Reduced burn size and inflammation
  • Improved epidermal thickness and structure, closely resembling unwounded skin
  • Enhanced collagen deposition and hair follicle formation, closely resembling unwounded skin
  • At week 2, 100% of all siFi2-treated burns closed completely, while only 75% of placebo and 70% of control subjects had their burns completely closed

Full Thickness Burn Study in siFi2 in Combination with PluroGel

When combined with PluroGel, a commonly used wound and burn dressing, siFi2 resulted in statistically significant reductions in both burn wound length and burn wound epidermal thickness as compared to PluroGel alone and control.  Histology images below show that the wounds treated with the siFi2 and PluroGel combination demonstrated a structure most similar to unwounded skin.

MicroCures' burn wound repair program is supported by a two-year, $1.5 million SBIR grant from the National Institutes of Health. This funding is helping advance the program through preclinical studies and toward the clinic.