Clinical trial · Interventional
DPCP to Treat Cutaneous Neurofibromas Associated With NF1
A Phase I, Open Label Study Employing the Topical Immunomodulator Diphencyprone to Treat Cutaneous Neurofibromas Associated With NF1
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Neurofibromatosis type 1 (NF1) is the most common genetic tumor predisposition syndrome, affecting up to 1 in 2500 individuals. Cutaneous neurofibromas are benign with self-limited growth; however, tumor burden may be excessive, tumors do not regress, and they can be disfiguring, painful, and itchy. Currently, the only treatment is surgery or laser ablation; however, outcomes are limited by the number of tumors that can be simultaneously removed, operating room availability, and painful recovery, with significant risk of regrowth. There is a strong need for noninvasive topical treatments for cutaneous neurofibromas. Diphencyprone (DPCP) is a "hapten" medication, a small molecule that activates the immune system when applied topically, which has been investigated as a cutaneous immunotherapy for other skin conditions. This is an open label Phase I study looking at safety and tolerability of this treatment as a primary endpoint, and tumor treatment as a secondary endpoint. Approximately 30 subjects will be enrolled at a single center within the US. Subjects with a clinical diagnosis of NF1 who have measurable disease and at least 4 cutaneous neurofibromas, will have DPCP applied topically to their neurofibromas once weekly for 10 weeks.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Cutaneous Neurofibroma | Skin Neurofibroma | ALIAS | 0.90 |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| DPCP | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- DPCP
- description
- 0.4% ointment
- interventionNames
- Drug: DPCP
Primary outcomes (2)
- measure
- Proportion of subjects with a grade 3 adverse event
- timeFrame
- at Day 77 or 107
- description
- Safety of DPCP will be measured as the proportion of subjects with a grade 3 on the Common Terminology Criteria for Adverse Events (CTCAE) criteria. Specifically, the safety of DPCP will be assessed as per CTCAE for eczema, version 5.0.
- measure
- Symptom standardized assessment scale
- timeFrame
- at Day 77 or 107
- description
- Tolerability of DPCP will be measured by the subjective response of patients who experience symptoms directly related to the therapy. Specifically, the subject will report their own symptoms of local tolerability based on a standardized assessment scale. The subject will assess pain, stinging, burning, and pruritus using a 4-point scale (0 none, 1 mild, 2 moderate, 3 severe) for each treated target lesion. Each of the four domains will be graded on the 4-point scale, each domain range from 0-16, with higher score indicating more severe symptoms. There is no overall score.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria * Clinically diagnosed NF1 as per the expertise of the study team. * At least four cutaneous neurofibromas greater than 4 mm in size that are able to be biopsied. * Age ≥ 18 years. * Ability to understand and the willingness to sign a written informed consent. * Women of child-bearing potential and men must agree to use adequate contraception prior to study entry, for the duration of study participation, and for 90 days following completion of therapy. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately. * A female of child-bearing potential is any woman (regardless of sexual orientation, having undergone a tubal ligation, or remaining celibate by choice) who meets the following criteria: 1. Has not undergone a hysterectomy or bilateral oophorectomy; or 2. Has not been naturally postmenopausal for at least 12 consecutive months (i.e., has had menses at any time in the preceding 12 consecutive months). Exclusion Criteria * Subjects may not be receiving any other investigational agents. * Subjects taking any of the following systemic therapies within 2 weeks of enrollment: corticosteroids, immunosuppressants, and/or any other medications (systemic or topical) that may affect the outcome of the study in the opinion of the investigator. * Subjects with any underlying diseases or dermatological conditions of the affected areas that require the use of interfering topical or systemic therapy, or that may impair immune responses such as HIV or lymphadenectomy of the axillary lymph node basin that drains the skin where DPCP is to be applied. * History of allergic reactions attributed to compounds of similar chemical or biologic composition to DPCP, or any of the other components of the DPCP ointment formulation. * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements. * Subjects must not be pregnant or nursing due to the potential for congenital abnormalities and the potential of this regimen to harm nursing infants.
References
Publications (0)
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