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HyBryte (Synthetic Hypericin) Versus Valchlor (Mechlorethamine) in the Treatment of CTCL

Pilot Study of HyBryte (Synthetic Hypericin) Versus Valchlor (Mechlorethamine) in the Treatment of CTCL

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06149247
Enrollment
10
Registered
2023-11-28
Start date
2023-12-05
Completion date
2024-06-27
Last updated
2025-08-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cutaneous T-Cell Lymphoma/Mycosis Fungoides

Keywords

CTCL, MF, Hypericin, HyBryte

Brief summary

The objective of this clinical study is to compare the safety and effectiveness of Valchlor versus HyBryte following 12 weeks of treatment.

Detailed description

Participants will be randomized to receive HyBryte or Valchlor in a 1:1 randomization. Participants will be treated for 12 weeks and follow-up visits will be conducted 1, 2, and 4 weeks after completion of the treatment phase of the trial. Prior to randomization, each participant will have at least 3 and up to 5 lesions identified (index lesions) that will be evaluated during the treatment phase and during the follow-up visits.

Interventions

HyBryte is synthetic hypericin formulated as a 0.25% hypericin ointment.

DRUGMechlorethamine Topical Gel

Valchlor is an FDA-approved drug for the treatment of CTCL.

Sponsors

Soligenix
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Minimum of 3 active treatment-accessible CTCL lesions * Subjects must have a clinical diagnosis of cutaneous T-cell lymphoma (CTCL, mycosis fungoides), Stage IA, IB, or Stage IIA * Subjects willing to follow the clinical protocol and voluntarily give their written informed consent * Female subjects not pregnant nor nursing and willing to undergo a pregnancy test within 30 days prior to treatment initiation

Exclusion criteria

* History of severe allergic reaction to any of the components of HyBryte or mechlorethamine (Valchlor) * Pregnancy or mothers who are breast-feeding * All women of childbearing potential (WOCBP) and males with female partners who are WOCBP not willing to use effective contraception * Subjects with history of sun hypersensitivity or photosensitive dermatoses (eg, porphyria, systemic lupus erythematosus (SLE), Sjogren's syndrome, etc.) * Subjects whose condition is spontaneously improving * Subjects receiving Valchlor (or any topical compound containing Mechlorethamine) in the preceding 2 months * Subjects receiving topical steroids or other topical treatments (eg, targretin gel) on treatment accessible lesions for CTCL within 2 weeks of enrollment * Subjects receiving systemic steroids, psoralen ultraviolet A (UVA) radiation therapy (PUVA), narrow band ultraviolet B (UVB) light therapy (NB-UVB) or carmustine (BCNU) or other systemic therapies for CTCL within 3 weeks of enrollment * Subjects who have received electron beam irradiation within 3 months of enrollment * Subjects with a history of significant systemic immunosuppression * Subjects taking other investigational drugs or drugs of abuse within 30 days of enrollment * Subject has any condition that, in the judgment of the Investigator, is likely to interfere with participation in the study * Subjects receiving drugs known to cause photosensitization within 2 weeks of starting HyBryte therapy unless they have not had evidence of photosensitization after receiving a stable dose of the medication for a minimum of 4 weeks

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With a Treatment Response in the Modified Composite Assessment of Index Lesion Disease Severity (mCAILS) Score12 weeksA treatment response is defined as a ≥50% improvement in mCAILS score at Week 12 when compared to the mCAILS score at baseline. The Modified Composite Assessment of Index Lesion Disease Severity (mCAILS) score measures: Erythema (or redness) on a scale of 0 (no redness) to 8 (very red), Scaling on a scale of 0 (no scaling) to 8 (all of the lesion is covered by a very rough surface), Plaque Elevation on a scale of 0 (no evidence of plaque above normal skin level) to 3 (plaque shows marked elevation above normal skin level) and Surface Area on a scale of 0 (no lesion/surface area is 0 cm\^2) to 18 (the lesion is larger than 300 cm\^2). A lower score means a better outcome.

Countries

United States

Participant flow

Participants by arm

ArmCount
HyBryte (0.25 % Hypericin)
HyBryte (0.25 % hypericin) ointment will be applied to CTCL lesions and treated with visible light 18-24 hours later starting at 6 J/cm\^2. Drug application/light session will be done twice a week (at least 2 calendar days apart) for 12 weeks.
5
Valchlor (Mechlorethamine)
Valchlor (0.016% mechlorethamine) gel will be applied to CTCL lesions once daily for 12 weeks.
5
Total10

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event01

Baseline characteristics

CharacteristicHyBryte (0.25 % Hypericin)Valchlor (Mechlorethamine)Total
Age, Continuous56.2 years
STANDARD_DEVIATION 19.18
62.4 years
STANDARD_DEVIATION 13.48
59.3 years
STANDARD_DEVIATION 16.86
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants0 Participants0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
5 Participants5 Participants10 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants0 Participants1 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
4 Participants5 Participants9 Participants
Sex: Female, Male
Female
2 Participants3 Participants5 Participants
Sex: Female, Male
Male
3 Participants2 Participants5 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 50 / 5
other
Total, other adverse events
2 / 53 / 5
serious
Total, serious adverse events
0 / 50 / 5

Outcome results

Primary

Number of Participants With a Treatment Response in the Modified Composite Assessment of Index Lesion Disease Severity (mCAILS) Score

A treatment response is defined as a ≥50% improvement in mCAILS score at Week 12 when compared to the mCAILS score at baseline. The Modified Composite Assessment of Index Lesion Disease Severity (mCAILS) score measures: Erythema (or redness) on a scale of 0 (no redness) to 8 (very red), Scaling on a scale of 0 (no scaling) to 8 (all of the lesion is covered by a very rough surface), Plaque Elevation on a scale of 0 (no evidence of plaque above normal skin level) to 3 (plaque shows marked elevation above normal skin level) and Surface Area on a scale of 0 (no lesion/surface area is 0 cm\^2) to 18 (the lesion is larger than 300 cm\^2). A lower score means a better outcome.

Time frame: 12 weeks

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
HyBryte (0.25 % Hypericin)Number of Participants With a Treatment Response in the Modified Composite Assessment of Index Lesion Disease Severity (mCAILS) Score3 Participants
Valchlor (Mechlorethamine)Number of Participants With a Treatment Response in the Modified Composite Assessment of Index Lesion Disease Severity (mCAILS) Score1 Participants

Source: ClinicalTrials.gov · Data processed: Apr 2, 2026