Repifermin is a keratinocyte growth factor that stimulates the production and differentiation of keratinocytes. Keratinocytes are primarily found in the skin and are involved in epithelialization of wounds. Repifermin was evaluated in patients with cancer in the treatment of mucositis.
Effectiveness Not Established
Research Evidence Summaries
Freytes, C.O., Ratanatharathorn, V., Taylor, C., Abboud, C., Chesser, N., Restrepoo, A. et al. (2004). Phase I/II randomized trial evaluating the safety and clinical effects of repifermin administered to reduce mucositis in patients undergoing autologous hematopoietic stem cell transplantation. Clinical Cancer Research, 10, 8318-8324. PubMed Abstract
Intervention Characteristics/Basic Study Process:
Repifermin (keratinocyte growth factor-2)
25 or 50 micrograms/kg
IV for 3 days prior to conditioning regimen and continued after transplant for up to 10 days.
Assessments before HSCT regimen, day of transplant, and 3x/wk until mucositis resolved.
The study was comprised of 42 patients (8 sites), with a mean age of 50.
21 each dose level – 14 study agent, 7 placebo
Randomized, double blind, placebo-controlled, phase I/II study
- NCI-CTC mucositis toxicity scale for BMT OMAS
- Severity of pain (0-10)
- Severity of pain while swallowing
- Duration of pain
- Ability to eat score (1 = normal, 2 = soft solids, 3 = liquids, 4 = nothing)
- Narcotic use for pain
Frequency, severity, and duration of diarrhea
- Grade 2 – 4 mucositis
- Placebo 100%, 64.2%
- 25 mcg p = 0.041
- Placebo vs 50 mcg (50%) p = 0.006
Effectiveness not established; study was not designed to have sufficient statistical power in identifying differences in efficacy between groups.
Number of end points suggest better outcome for 50 mcg group (mean duration, pain on swallowing, days on narcotic pain medication).
- Study predominantly designed for “safety” not “efficacy”.
- Small sample group used (n = 42)
- Multiple conditioning regimens were used; this may affect final outcome as far as efficacy.
- Auto HSCT population only
- Multiple doses were used in study.
Number of post-transplant doses required was unclear.
Larger trial is needed.