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A Phase 1/2 Study of PRO-203 in Healthy Volunteers and Participants With Systemic Sclerosis.

3 september 2026 bijgewerkt door: Prolium Bioscience, Inc

A Two-part, Phase 1/2, Randomized, Double-blind, Placebo-controlled, Single-ascending-dose Study of PRO-203 in Healthy Adult Volunteers Followed by an Open-label, Single-ascending-dose With Priming Study of PRO-203 in Participants With Systemic Sclerosis

A two-part study of PRO-203 administered subcutaneously in healthy adult volunteers and participants with Systemic Sclerosis (SSc).

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

This two-part study is designed to characterize the first-in-human safety, tolerability, PK, and PD profile of PRO-203 across ascending dose levels.

Part 1 - Healthy Volunteers (HV) Part 1 enrollment is complete and has enrolled 20 healthy volunteers across 3 cohorts. Participants within each cohort received a single SC dose of PRO-203 or matching placebo. Part 1 has completed enrollment.

Part 2 - Systemic Sclerosis (SSc) Up to 24 participants with SSc will be enrolled in multiple cohorts (with optional additional cohorts) Participants within each cohort will receive a single SC cycle of PRO-203. Part 2 includes a Main Study and an optional Long-term Extension (LTE). In the LTE, eligible participants may receive retreatment if they meet retreatment criteria. Total study duration per participant is up to 53 weeks.

Studietype

Ingrijpend

Inschrijving (Geschat)

44

Fase

  • Fase 2
  • Fase 1

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Australië
    • Victoria
      • Melbourne, Victoria, Australië, 3004
        • Voltooid
        • Nucleus Network
  • China
      • Beijing, China
        • Werving
        • Peking University Third Hospital
        • Contact:
      • Guangzhou, China
        • Werving
        • The third affiliated hospital of Sun Yat-Sen University
        • Contact:
      • Guangzhou, China
        • Werving
        • Guangdong Provincial People's Hospital
        • Contact:
      • Nanchang, China
        • Werving
        • The First Affiliated Hospital of Nanchang University
        • Contact:
      • Nanchang, China
        • Werving
        • The Second Affiliated Hospital of Nanchang University
        • Contact:
      • Nanjing, China
        • Werving
        • Nanjing Drum Tower Hospital
        • Contact:
      • Pingxiang, China
        • Werving
        • Pingxiang People's Hospital
        • Contact:
  • Mexico
      • Chihuahua City, Mexico
        • Werving
        • Hospital Angeles Chihuahua
        • Contact:
      • San Nicolás de los Garza, Mexico
        • Werving
        • Unidad Médica para la Salud Integral (UMSI)
        • Contact:
  • Zuid -Korea
      • Seoul, Zuid -Korea
        • Werving
        • Seoul National University Hospital
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Beschrijving

Key Inclusion Criteria (All Participants)

  • Is male or female, age 18 to 65 years, inclusive, at Screening.
  • Able to provide Informed Consent.
  • Absolute B cell count > 25 cells/uL.

Additional Inclusion for Part 1 (Closed to Enrollment)

  • In good general health, determined by no clinically significant findings in the of the investigator from medical history, physical examination, 12-lead ECG, clinical laboratory findings, and vital signs at Screening and Day -1 (participants with Gilbert's disease with associated abnormalities of liver function tests are eligible for enrollment).
  • Up to date vaccination status per local guidelines (including but not limited to influenza vaccine, COVID booster and hepatitis B vaccine).

Additional Inclusion for Part 2

  • Fulfill 2013 ACR/ EULAR criteria for classification of SSc with a total score of ≥ 9.
  • Active disease defined as at least two of the following at screening:
  • Disease duration ≤ 2 years (since onset of first-non-Raynaud-symptom), or
  • Elevated acute phase reactant levels (CRP ≥ 6 mg/L, erythrocytes sedimentation rate [ESR] ≥ 28 mm/1h, or platelet count ≥ 330,000/µL), or
  • Baseline mRSS ≥10 with evidence of progression, defined as mRSS increase at least 3 units, or involvement of 1 new body area and mRSS increase at least 2 units, or involvement of 2 new body areas (each within the previous 6 months), or
  • ≥ 1 tendon friction rub, or
  • Elevation of CK or aldolase > 2 × the upper limit of normal (ULN) consistent with SSc-related myopathy, or

  • Progressive fibrosing interstitial lung disease (ILD) as defined by at least one of the following criteria at any time within the prior 2 years:

    1. relative decline in forced vital capacity (FVC) % predicted ≥ 10%, or
    2. relative decline in FVC % predicted ≥ 5% to <10% and worsened respiratory symptoms, or
    3. relative decline in FVC % predicted ≥ 5% to <10% and increased extent of fibrosis on high-resolution computed tomography (HRCT), or
    4. worsened respiratory symptoms and increased extent of fibrosis on HRCT
  • Intolerant or refractory to at least 1 line of standard therapy, including methotrexate, azathioprine, IVIG, mycophenolic acid derivatives, cyclophosphamide, TNF-inhibitors, rituximab, or tocilizumab.

Key Exclusion Criteria (All Participants)

  • Any clinically significant underlying illness in the opinion of the investigator.
  • Active infection within 4 weeks prior to screening. Participants receiving IV antibiotics or having received IV antibiotics within 14 days prior to enrollment are excluded.
  • Positive QuantiFERON-Gold TB test at screening.
  • Plan to receive live, attenuated vaccine after signing ICF (inactive vaccines, such as the flu vaccine, are allowed).
  • Evidence of malignant disease or malignancies diagnosed within the previous 5 years (except for treated local basal or squamous cell carcinoma of the skin or carcinoma in situ of the cervix uteri that had been excised and cured).
  • Currently enrolled in another investigational device or drug study, or less than 30 days or 5 half-lives of the prior investigational agent (whichever is longer) have passed since ending another investigational device or drug study or plans to enroll in another investigational device or drug study during the course of this study.
  • Social smokers e.g. up to 10 cigarettes per week (or equivalent amounts of nicotine containing products) and willing to abstain during inpatient stay, are allowed

Additional Exclusion Criteria for Part 1 (Closed to Enrollment)

  • Use of any prescription medication within 14 days and OTC medications, vitamins, herbal medications (e.g., St. John's wort), or cannabis, except for contraceptive medications and as needed (prn) acetaminophen/paracetamol (not exceeding 2 grams/day) within 7 days prior to administration of the study drug and throughout the study.

Additional Exclusion Criteria for Part 2

  • Rheumatic autoimmune disease other than SSc.
  • Positive anti-centromere antibodies.
  • Pulmonary disease with FVC ≤ 45% of predicted, or DLCO ≤ 35% of predicted.
  • Class 2 or higher pulmonary arterial hypertension or evidence of other moderately severe pulmonary disease.
  • Renal crisis within 6 months prior to Screening.
  • Prior treatment with cellular immunotherapy (eg, CAR-T) or gene therapy product directed at any target.
  • Previous treatment with chlorambucil, bone marrow transplantation, or total lymphoid irradiation.
  • Previous treatment with thalidomide, anti-thymocyte globulin, plasmapheresis, or extracorporeal photopheresis.
  • Unable to washout current immunosuppressive therapy within 2 months
  • Has received anti-CD19 or CD20 therapies, within 6 months prior to start of therapy
  • Plan to receive live or live-attenuated vaccines within 8 weeks prior to first dose of study drug and during treatment until B cell reconstitution to 80% of baseline (inactive vaccines, such as the flu vaccine, are allowed)

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Sequentiële toewijzing
  • Masker: Verdrievoudigen

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Placebo-vergelijker: Part 1: Placebo
Matching SC placebo administered to randomized Part 1 participants
Ander: Placebo
Matching placebo comparator for Part 1 participants.
Experimenteel: Part 1: PRO-203
Healthy participants receive single ascending dose of PRO-203 in dose escalation cohorts
Geneesmiddel: PRO-203
PRO-203 administered as escalating single dose in healthy participants or as a single cycle in participants with systemic sclerosis.
Experimenteel: Part 2: Multiple Doses of PRO-203
Participants with systemic sclerosis receive a single cycle of PRO-203 across cohorts, including additional treatment as needed.
Geneesmiddel: PRO-203
PRO-203 administered as escalating single dose in healthy participants or as a single cycle in participants with systemic sclerosis.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Incidence of Adverse Events and Laboratory Abnormalities [Safety and Tolerability]
Tijdsspanne: 13 weeks (Part 1) / 49 weeks (Part 2)
Incidence and severity of treatment-emergent adverse events, serious adverse events, and dose-limiting toxicities, including changes in clinical laboratory values, ECGs, and vital signs.
13 weeks (Part 1) / 49 weeks (Part 2)

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Pharmacokinetics of PRO-203
Tijdsspanne: 13 weeks (Part 1) / 49 weeks (Part 2)
Serum drug levels of PRO-203 over time
13 weeks (Part 1) / 49 weeks (Part 2)
Pharmacodynamic-related biomarkers of PRO-203
Tijdsspanne: 13 weeks (Part 1) / 49 weeks (Part 2)
Peripheral blood B lymphocyte levels over time
13 weeks (Part 1) / 49 weeks (Part 2)
Immunogenicity of PRO-203
Tijdsspanne: 13 weeks (Part 1) / 49 weeks (Part 2)
Level of anti-drug antibodies
13 weeks (Part 1) / 49 weeks (Part 2)

Andere uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
FVC % Predicted (Part 2)
Tijdsspanne: 13 weeks / 49 weeks
Change from baseline in forced vital capacity (FVC) as a percentage of predicted normal.
13 weeks / 49 weeks
Diffusing Capacity for Carbon Monoxide (DLCO) (Part 2)
Tijdsspanne: 13 weeks / 49 weeks
Change from baseline in diffusing capacity for carbon monoxide (DLCO) as a percentage of predicted normal.
13 weeks / 49 weeks
Modified Rodnan Skin Score (mRSS) (Part 2)
Tijdsspanne: 13 weeks /49 weeks
Change from baseline in Modified Rodnan Skin Score (mRSS) on a scale of 0 to 51, with a higher score indicating greater skin thickening.
13 weeks /49 weeks
Revised Composite Response Index in Systemic Sclerosis (rCRISS) (Part 2)
Tijdsspanne: 13 weeks / 49 weeks
Change from baseline in disease response as measured by the Revised Composite Response Index in Systemic Sclerosis (rCRISS), where a higher score indicates a better outcome.
13 weeks / 49 weeks
European Scleroderma Trials and Research Group Activity Index (EUSTAR-AI) (Part 2)
Tijdsspanne: 13 weeks / 49 weeks
Change from baseline in disease activity as measured by the European Scleroderma Trials and Research Group Activity Index (EUSTAR-AI) on a scale of 0 to 10, where a higher score indicates greater disease activity.
13 weeks / 49 weeks
Health Assessment Questionnaire - Disability Index (HAQ-DI) (Part 2)
Tijdsspanne: 13 weeks / 49 weeks
Change from baseline in physical function and disability as measured by the Health Assessment Questionnaire - Disability Index (HAQ-DI) on a scale of 0 to 3, where a higher score indicates greater difficulty with daily activities.
13 weeks / 49 weeks

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Prolium Bioscience, Inc

Onderzoekers

  • Studie directeur: Salim Mujais, Prolium Bioscience, Inc

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

27 oktober 2025

Primaire voltooiing (Geschat)

1 januari 2027

Studie voltooiing (Geschat)

1 januari 2028

Studieregistratiedata

Eerst ingediend

10 december 2025

Eerst ingediend dat voldeed aan de QC-criteria

7 juni 2026

Eerst geplaatst (Werkelijk)

11 juni 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

8 september 2026

Laatste update ingediend die voldeed aan QC-criteria

3 september 2026

Laatst geverifieerd

1 september 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • PRO-203-101

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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