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Phase II/III Study of FXS5626 in Participants With Non-segmental Vitiligo

This is a Multicenter, Randomized, Double-blind, Placebo-controlled, Adaptive Seamless Design, Phase II/III Study Evaluating the Efficacy and Safety of FXS5626 in Participants With Non-segmental Vitiligo

This is a multicenter, randomized, double-blind, placebo-controlled, adaptive seamless design, Phase II/III study evaluating the efficacy and safety of FXS5626 in participants with non-segmental vitiligo.

Studieoversikt

Detaljert beskrivelse

This is a multicenter, randomized, double-blind, placebo-controlled, adaptive seamless design, Phase II/III study evaluating the efficacy and safety of FXS5626 in participants with non-segmental vitiligo. The study consisted 2 periods: a phase 2 period and a phase 3 period.

Phase 2 design: This period is planned to enroll 120 patients with non-segmental vitiligo. Eligible participants will be randomized in a 2:2:1:1 ratio to the FXS5626 75 mg twice daily (BID) group, the FXS5626 50 mg BID group, the FXS5626 25 mg BID group, or the placebo group, with 40, 40, 20, and 20 participants enrolled in each group, respectively. The overall study duration consists of a 4-week screening period, a 24-week double-blind treatment period, and a 4-week safety follow-up period.

Phase 3 design: This period is planned to enroll 360 patients with non-segmental vitiligo. Eligible participants will be randomized in a 2:1 ratio to the FXS5626 group and the placebo group. The overall study duration consists of a 4-week screening period, a 52-week double-blind treatment period, and a 4-week safety follow-up period.

Studietype

Intervensjonell

Registrering (Antatt)

480

Fase

  • Fase 2
  • Fase 3

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studer Kontakt Backup

Studiesteder

    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, Kina, 200040
        • Huashan Hospital, Fudan University
        • Ta kontakt med:
        • Ta kontakt med:

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

12 år til 75 år (Barn, Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Participants must meet all of the following inclusion criteria:

  1. Understand the trial procedures and methods, voluntarily participate in this trial, be able to communicate well with the investigator, comply with the requirements of the entire study, and provide written informed consent;
  2. Screening age must meet the following criteria:

1) Age ≥18 years and ≤75 years, regardless sex (Phase 2); 2) Age ≥12 years and ≤75 years, regardless of sex (Phase 3); 3. At screening,participants must have a body mass index (BMI) ≥18 kg/m²; for adolescent participants in the Phase 3, baseline body weight must be ≥40 kg; 4. Clinically diagnosed with non-segmental vitiligo, either active or stable, with a disease history ≥3 months; 5. At the screening and baseline visits, vitiligo lesions must satisfy all of the following criteria:

  1. The percentage of vitiligo lesion area relative to the total body surface area (BSA) is ≥3%, excluding involvement of the palms, dorsa of the hands (fingers), soles, and dorsa of the feet;
  2. Facial involvement BSA (F-BSA) ≥0.5%;
  3. T-VASI ≥0.5 and 3 ≤ T-VASI ≤50; 6. Participants must ensure and agree that, from 28 days before signing the informed consent form to 28 days after the last dose, female participants of childbearing potential, male participants, and their spouses will use effective contraceptive methods other than oral medications (such as condoms or intrauterine devices), and will not donate sperm or ova during this study.

Exclusion Criteria

  1. Presence of vitiligo-related medical conditions and other skin diseases at screening, as assessed by the investigator;
  2. Presence of >33% leukotrichia in areas of vitiligo on the face or > 33% leukotrichia in areas of vitiligo on the body (including the face);
  3. As assessed by the investigator, accompanied by active infection or history of infection;
  4. Patients with a history of severe herpes simplex and herpes zoster infections, or with active/current herpes simplex or herpes zoster infection;
  5. Participants with any other clinically significant medical history, or other conditions that, as assessed by the investigator, may affect the participant's safety or compliance, or result in the participant's inability to complete the study.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Firemannsrom

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Arm1: FXS5626 25 mg (Phase 2)

FXS5626 25 mg

FXS5626 tablets administered orally twice daily (BID) for 24 weeks.

Eksperimentell: Arm2: FXS5626 50 mg (Phase 2)

FXS5626 50 mg

FXS5626 tablets administered orally twice daily (BID) for 24 weeks.

Eksperimentell: Arm3: FXS5626 75 mg (Phase 2)

FXS5626 75 mg

FXS5626 tablets administered orally twice daily (BID) for 24 weeks.

Eksperimentell: Arm4: FXS5626 group (Phase 3)

FXS5626 group (Dosage will be confirmed after Phase 2)

FXS5626 tablets administered orally twice daily (BID) for 52 weeks.

Placebo komparator: Arm5: Placebo (Phase 2)

Placebo

FXS5626 placebo tablets administered orally twice daily (BID) for 24 weeks.

Placebo komparator: Arm6: Placebo (Phase 3)

Placebo

FXS5626 placebo tablets administered orally twice daily (BID) for 52 weeks.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Percent change from baseline in facial vitiligo area scoring index (F-VASI) at week 24 in Phase 2 study.
Tidsramme: 24 weeks

The vitiligo area scoring index (VASI) is a validated scoring method used to assess the areas of depigmentation due to vitiligo. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

24 weeks
Proportion of participants achieving Facial Vitiligo Area Scoring Index 75 (F-VASI 75, at least 75% improvement from baseline) at Week 52 in Phase 3 study.
Tidsramme: 52 weeks

The vitiligo area scoring index (VASI) is a validated scoring method used to assess the areas of depigmentation due to vitiligo. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome. F-VASI 75 denotes a at least 75% improvement from baseline in the Facial Vitiligo Area Scoring Index (F-VASI).

52 weeks

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Percent change from baseline in Facial Vitiligo Area Scoring Index (F-VASI) at planned visits other than Week 24(Phase 2)
Tidsramme: 24 weeks

The vitiligo area scoring index (VASI) is a validated scoring method used to assess the areas of depigmentation due to vitiligo. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

24 weeks
Proportion of participants achieving Facial Vitiligo Area Scoring Index 75 (F-VASI 75, at least 75% improvement from baseline) at planned visits (Phase 2)
Tidsramme: 24 weeks

At least 75% improvement from baseline in facial Vitiligo Area Scoring Index. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

24 weeks
Proportion of participants achieving Facial Vitiligo Area Scoring Index 50 (F-VASI 50, at least 50% improvement from baseline) at planned visits (Phase 2)
Tidsramme: 24 weeks

At least 50% improvement from baseline in facial Vitiligo Area Scoring Index. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

24 weeks
Proportion of participants achieving Facial Vitiligo Area Scoring Index 90 (F-VASI 90, at least 90% improvement from baseline) at planned visits (Phase 2)
Tidsramme: 24 weeks

At least 90% improvement from baseline in facial Vitiligo Area Scoring Index. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

24 weeks
Percent change from baseline in Total Vitiligo Area Scoring Index (T-VASI) at planned visits (Phase 2)
Tidsramme: 24 weeks

The vitiligo area scoring index (VASI) is a validated scoring method used to assess the areas of depigmentation due to vitiligo. It is based on a composite estimate of the overall area of vitiligo patches, measured by the number of hand units (palm plus 5 digits = 1% body surface area [BSA]) multiplied by the degree of depigmentation within each affected area (0%, 10%, 25%, 50%, 75%, 90%, or 100%). The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

24 weeks
Proportion of participants achieving Total Vitiligo Area Scoring Index 50 (T-VASI 50, at least 50% improvement from baseline) at planned visits (Phase 2)
Tidsramme: 24 weeks

At least 50% improvement from baseline in Total Vitiligo Area Scoring Index. The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

24 weeks
Proportion of participants achieving Total Vitiligo Area Scoring Index 75 (T-VASI 75, at least 75% improvement from baseline) at planned visits (Phase 2)
Tidsramme: 24 weeks

At least 75% improvement from baseline in Total Vitiligo Area Scoring Index. The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

24 weeks
Change from baseline in the Facial Body Surface Area (F-BSA) affected by vitiligo at planned visits (Phase 2)
Tidsramme: 24 weeks

F-BSA involvement was the proportion of the facial body surface area with vitiligo. The area "Face" was defined as including the area on the forehead to the original hairline, on the cheek to the jawline vertically to the jawline and laterally from the corner of the mouth to the tragus. The area "Face" did not include surface area of the lips, scalp, ears, or neck, but included the nose and eyelids. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA.

24 weeks
Change from baseline in the Total Body Surface Area (T-BSA) affected by vitiligo at planned visits (Phase 2)
Tidsramme: 24 weeks

T-BSA involvement was the proportion of the body surface area with vitiligo. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA.

24 weeks
Proportion of participants achieving a score of 0 or 1 on the Facial Physician's Global Vitiligo Assessment (F-PhGVA) at planned visits (Phase 2)
Tidsramme: 24 weeks

The F-PhGVA is an assessment tool used by physicians to evaluate the severity of facial vitiligo. It is rated on a 4-point scale: overall improvement: (0) no change, (1)limited extent, (2)moderate extent, (3)extensive, (4)very extensive. Higher score corresponds to worse evaluation.

24 weeks
Proportion of participants achieving a score of 0 or 1 on the Total Physician's Global Vitiligo Assessment (T-PhGVA) at planned visits (Phase 2)
Tidsramme: 24 weeks

The T-PhGVA is a assessment tool used by physicians to evaluate the severity of total body vitiligo. It is rated on a 4-point scale: overall improvement: (0) no change, (1)limited extent, (2)moderate extent, (3)extensive, (4)very extensive. Higher score corresponds to worse evaluation.

24 weeks
Proportion of participants achieving a score of 1 or 2 on the Facial Patient's Global Impression of Change-Vitiligo (F-PaGIC-V) at planned visits (Phase 2)
Tidsramme: 24 weeks

F-PaGIC-V is an assessment of improvement of vitiligo on the face by the participant. It is a 7-point scale ((1) Very much improved, (2) Much improved, (3) Minimally improved, (4) No change, (5) Minimally worse, (6) Much worse, or (7) Very much worse).

24 weeks
Proportion of participants achieving a score of 1 or 2 on the Total Body Patient's Global Impression of Change-Vitiligo (T-PaGIC-V) at planned visits (Phase 2)
Tidsramme: 24 weeks

T-PaGIC-V is an assessment of improvement of vitiligo on the total body by the participant. It is a 7-point scale ((1) Very much improved, (2) Much improved, (3) Minimally improved, (4) No change, (5) Minimally worse, (6) Much worse, or (7) Very much worse).

24 weeks
Change from baseline in the Vitiligo-Specific Quality of Life (VitiQoL) at planned visits (Phase 2)
Tidsramme: 24 weeks

VitiQoL is a 15-item QoL assessment that asks participants to rate various aspects of their condition during the past month using a 7-point scale ("Not at all" to "All of the time")

24 weeks
Number of Participants with Adverse Events (AEs) (Phase 2)
Tidsramme: 24 weeks and 4 weeks

An AE is defined as any untoward medical occurrence in a patient or clinical investigation in which a participant is administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment. AE severity was assessed as mild, moderate and severe. Mild: Transient discomfort, no interference with daily activities, and/or no medical intervention required. Moderate: Mild to moderate limitation of daily activities, and/or minimal medical intervention required. Severe: Marked limitation of daily activities, requiring assistance with activities of daily living, and/or medical intervention required, possibly hospitalization.

24 weeks and 4 weeks
Plasma concentrations of FXS5626 and its metabolite TT-190 (Phase 2)
Tidsramme: 24 weeks
24 weeks
Proportion of participants achieving Total Vitiligo Area Scoring Index 50 (T-VASI 50) at Week 52 (Phase 3)
Tidsramme: 52 weeks

At least 50% improvement from baseline in total body Vitiligo Area Scoring Index. The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

52 weeks
Percent change from baseline in Facial Vitiligo Area Scoring Index (F-VASI) at planned visits (Phase 3)
Tidsramme: 52 weeks

The vitiligo area scoring index (VASI) is a validated scoring method used to assess the areas of depigmentation due to vitiligo. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

52 weeks
Proportion of participants achieving Facial Vitiligo Area Scoring Index 50 (F-VASI 50) at planned visits (Phase 3)
Tidsramme: 52 weeks

At least 50% improvement from baseline in facial Vitiligo Area Scoring Index. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

52 weeks
Proportion of participants achieving Facial Vitiligo Area Scoring Index 75 (F-VASI 75) at planned visits other than Week 52 (Phase 3)
Tidsramme: 52 weeks

At least 75% improvement from baseline in facial Vitiligo Area Scoring Index. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

52 weeks
Proportion of participants achieving Facial Vitiligo Area Scoring Index 90 (F-VASI 90) at planned visits (Phase 3)
Tidsramme: 52 weeks

At least 90% improvement from baseline in facial Vitiligo Area Scoring Index. The F-VASI includes contributions from the face, with a possible range from 0 to 3. Higher scores of F-VASI mean a worse outcome.

52 weeks
Percent change from baseline in Total Vitiligo Area Scoring Index (T-VASI) at planned visits (Phase 3)
Tidsramme: 52 weeks

The vitiligo area scoring index (VASI) is a validated scoring method used to assess the areas of depigmentation due to vitiligo. It is based on a composite estimate of the overall area of vitiligo patches, measured by the number of hand units (palm plus 5 digits = 1% body surface area [BSA]) multiplied by the degree of depigmentation within each affected area (0%, 10%, 25%, 50%, 75%, 90%, or 100%). The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

52 weeks
Proportion of participants achieving Total Vitiligo Area Scoring Index 50 (T-VASI 50) at planned visits other than Week 52 (Phase 3)
Tidsramme: 52 weeks

At least 50% improvement from baseline in total body Vitiligo Area Scoring Index. The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

52 weeks
Proportion of participants achieving Total Vitiligo Area Scoring Index 75 (T-VASI 75) at planned visits (Phase 3)
Tidsramme: 52 weeks

At least 75% improvement from baseline in total body Vitiligo Area Scoring Index. The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

52 weeks
Proportion of participants achieving Total Vitiligo Area Scoring Index 90 (T-VASI 90) at planned visits (Phase 3)
Tidsramme: 52 weeks

At least 90% improvement from baseline in facial Vitiligo Area Scoring Index.The T-VASI is calculated using a formula that includes contributions from all body regions, with a possible range from 0 to 100. Higher scores of T-VASI mean a worse outcome.

52 weeks
Change from baseline in the F-BSA affected by vitiligo at planned visits (Phase 3)
Tidsramme: 52 weeks

F-BSA involvement was the proportion of the facial body surface area with vitiligo. The area "Face" was defined as including the area on the forehead to the original hairline, on the cheek to the jawline vertically to the jawline and laterally from the corner of the mouth to the tragus. The area "Face" did not include surface area of the lips, scalp, ears, or neck, but included the nose and eyelids. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA.

52 weeks
Change from baseline in the T-BSA affected by vitiligo at planned visits (Phase 3)
Tidsramme: 52 weeks

T-BSA involvement was the proportion of the body surface area with vitiligo. Body surface area assessment was performed by the Palmar Method. Body surface area was estimated to the nearest 0.1%. The approximate size of the participant's entire palmar surface (i.e., the palm plus 5 digits) was considered as 1% BSA, and the approximate size of the participant's thumb was considered as 0.1% BSA.

52 weeks
Proportion of participants achieving a score of 0 or 1 on the F-PhGVA at planned visits (Phase 3)
Tidsramme: 52 weeks

The F-PhGVA is an assessment tool used by physicians to evaluate the severity of facial vitiligo. It is rated on a 4-point scale: overall improvement: (0) no change, (1)limited extent, (2)moderate extent, (3)extensive, (4)very extensive. Higher score corresponds to worse evaluation.

52 weeks
Proportion of participants achieving a score of 0 or 1 on the T-PhGVA at planned visits (Phase 3)
Tidsramme: 52 weeks

The T-PhGVA is a assessment tool used by physicians to evaluate the severity of total body vitiligo. It is rated on a 4-point scale: overall improvement: (0) no change, (1)limited extent, (2)moderate extent, (3)extensive, (4)very extensive. Higher score corresponds to worse evaluation.

52 weeks
Proportion of participants achieving score of 1 or 2 on the a F-PaGIC-V at planned visits (Phase 3)
Tidsramme: 52 weeks

F-PaGIC-V is an assessment of improvement of vitiligo on the face by the participant. It is a 7-point scale ((1) Very much improved, (2) Much improved, (3) Minimally improved, (4) No change, (5) Minimally worse, (6) Much worse, or (7) Very much worse).

52 weeks
Proportion of participants achieving a score of 1 or 2 on the T-PaGIC-V at planned visits (Phase 3)
Tidsramme: 52 weeks

T-PaGIC-V is an assessment of improvement of vitiligo on the total body by the participant. It is a 7-point scale ((1) Very much improved, (2) Much improved, (3) Minimally improved, (4) No change, (5) Minimally worse, (6) Much worse, or (7) Very much worse).

52 weeks
Change from baseline in the VitiQoL at planned visits (Phase 3)
Tidsramme: 52 weeks

VitiQoL is a 15-item QoL assessment that asks participants to rate various aspects of their condition during the past month using a 7-point scale ("Not at all" to "All of the time")

52 weeks
Change from baseline in the Dermatology Life Quality Index (DLQI)) at planned visits (Phase 3)
Tidsramme: 52 weeks

DLQI is a 10-item instrument, each item scored from 0 to 3 where higher scores correspond to worse symptom impact, full range from 0 to 30.

52 weeks
Proportion of participants achieving a DLQI total score of "0" or "1"at planned visits (Phase 3)
Tidsramme: 52 weeks

DLQI is a 10-item instrument, each item scored from 0 to 3 where higher scores correspond to worse symptom impact, full range from 0 to 30.

52 weeks
Proportion of participants achieving a score of 4 or 5 on the Vitiligo Noticeability Scale (VNS) at planned visits (Phase 3)
Tidsramme: 52 weeks

The VNS is a patient-reported measure of vitiligo treatment success that is rated on a 5-point scale. The participant was asked to respond to the following query: Compared with before treatment, how noticeable is the vitiligo now? Responses: (1) more noticeable, (2) as noticeable, (3) slightly less noticeable, (4) a lot less noticeable, and (5) no longer noticeable. higher score corresponds to worse symptom impact.

52 weeks
Number of Participants with Adverse Events (AEs) (Phase 3)
Tidsramme: 52 weeks and 4 weeks

An AE is defined as any untoward medical occurrence in a patient or clinical investigation in which a participant is administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment. AE severity was assessed as mild, moderate and severe. Mild: Transient discomfort, no interference with daily activities, and/or no medical intervention required. Moderate: Mild to moderate limitation of daily activities, and/or minimal medical intervention required. Severe: Marked limitation of daily activities, requiring assistance with activities of daily living, and/or medical intervention required, possibly hospitalization.

52 weeks and 4 weeks

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

30. oktober 2026

Primær fullføring (Antatt)

10. november 2027

Studiet fullført (Antatt)

8. desember 2027

Datoer for studieregistrering

Først innsendt

17. september 2026

Først innsendt som oppfylte QC-kriteriene

24. september 2026

Først lagt ut (Faktiske)

25. september 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

25. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

24. september 2026

Sist bekreftet

1. september 2026

Mer informasjon

Begreper knyttet til denne studien

Andre studie-ID-numre

  • FXS5626-VIT-301

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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