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ADI-PEG 20:n, TMZ:n ja sädehoidon yhdistelmähoito vastadiagnosoidun korkea-asteisen gliooman (HGG) hoidossa

perjantai 6. marraskuuta 2026 päivittänyt: Sabine Mueller, MD, PhD

Fasa 1/2 -tutkimus pegyloitu arginiinideiminaasista (ADI-PEG 20) yhdistettynä sädehoitoon (RT) ja temosolomidiin (TMZ) lapsilla, nuorilla ja nuorilla aikuisilla, joilla on vasta diagnosoitu korkea-asteinen gliooma (HGG)

This is an open label, intra-patient dose escalation, to evaluate ADI-PEG 20, in combination with Temozolomide (TMZ) and radiation therapy (RT) in children, adolescents and young adult patients with newly diagnosed high grade glioma (HGG).

Tutkimuksen yleiskatsaus

Yksityiskohtainen kuvaus

PRIMARY OBJECTIVES:

I. To evaluate the safety and estimate the RP2D of ADI-PEG 20 in combination with RT and TMZ in with children, adolescents, and young adults with newly diagnosed high-grade glioma, and the RP2D of ADI-PEG 20 during maintenance therapy with TMZ (Phase 1)

II. To assess the anti-tumor activity of the combination of ADI-PEG 20 with RT and TMZ based on progression-free survival (PFS) at 12 months for HGG histone-WT participants, 12 months for H3K27 altered DMG, and 10 months for H3G34 mutant DHG in children, adolescents, and young adult participants (Phase 2)

EXPLORATORY OBJECTIVES:

I. To assess the anti-tumor activity of the combination of ADI-PEG 20 with RT and TMZ based on overall survival at 12 months for HGG histone-WT, Histone 3 lysine 27 (H3K27) altered DMG, and Histone 3 G34-mutant (H3G34) DHGs. II. To correlate argininosuccinate synthase 1 (ASS1) and arginase tumor expression and Cerebral spinal fluid (CSF)/systemic arginine levels with survival.

III. To correlate levels of cell free DNA and other liquid biomarkers in the context of imaging response criteria and clinical outcome.

IV. To assess the microbiome in the context of imaging response criteria and clinical outcome.

V. To describe the pharmacokinetics of ADI-PEG 20 in combination with radiotherapy and TMZ and in maintenance treatment in children, adolescent and young adults with HGG.

VI. To describe the pharmacodynamics of ADI-PEG 20 in combination with radiotherapy and TMZ and in maintenance treatment in children, adolescent and young adults with HGG.

VII. To assess immunogenicity of ADI-PEG 20 in combination with radiotherapy and TMZ and in maintenance treatment in children, adolescent and young adults with HGG.

VIII. To explore the use of serial single voxel magnetic resonance (MR) spectroscopy to evaluate on-target tumor metabolic changes with the use of ADI-PEG 20.

IX. To explore sex differences in arginine metabolism in participants with newly diagnosed high-grade glioma pre and post treatment with ADI-PEG 20.

X. To characterize immune micro-environment of tumor edge in comparison to tumor core. Inclusion of normal/reactive brain tissue will be used to compare baseline reactive transcriptional signature, including immune pathways activated in peritumoral regions of the brain.

OUTLINE: Participants will be enrolled into Phase 1 (dose escalation) where the pediatric RP2D of ADI-PEG 20 in combination with radiotherapy and daily TMZ (DLT period 1) as well as ADI-PEG 20 with TMZ during maintenance (DLT period 2) will be determined through a rolling-6 design and then followed by a planned Phase 2. Participants in Phase 2 will further be analyzed by cohort based on confirmed diagnosis of the following expressed biomarkers:

Cohort 1: Participants with newly diagnosed histone wild type (WT) HGG. (N=25).

Cohort 2: Participants with newly diagnosed H3K27 altered diffuse midline gliomas (DMG). (N=30).

Cohort 3: Participants with newly diagnosed H3G34 mutant diffuse hemispheric gliomas (DHG). (N=18).

Participants can receive treatment up to 104 weeks. After completing the 30-day toxicity evaluation period, participants will enter follow-up and additional follow-up data will be documented under the Pediatric Neuro-oncology Consortium (PNOC) COMP protocol. Participants will be followed under the PNOC COMP protocol until death or withdrawal from the study.

Opintotyyppi

Interventio

Ilmoittautuminen (Arvioitu)

97

Vaihe

  • Vaihe 2
  • Vaihe 1

Yhteystiedot ja paikat

Tässä osiossa on tutkimuksen suorittajien yhteystiedot ja tiedot siitä, missä tämä tutkimus suoritetaan.

Opiskeluyhteys

  • Nimi: PNOC Operations Office
  • Puhelinnumero: 415-502-1600
  • Sähköposti: PNOC034@ucsf.edu

Opiskelupaikat

    • California
      • San Francisco, California, Yhdysvallat, 94143
        • University of California, San Francisco

Osallistumiskriteerit

Tutkijat etsivät ihmisiä, jotka sopivat tiettyyn kuvaukseen, jota kutsutaan kelpoisuuskriteereiksi. Joitakin esimerkkejä näistä kriteereistä ovat henkilön yleinen terveydentila tai aiemmat hoidot.

Kelpoisuusvaatimukset

Opintokelpoiset iät

3 vuotta - 39 vuotta (Lapsi, Aikuinen)

Hyväksyy terveitä vapaaehtoisia

Ei

Sukupuolet, jotka voivat opiskella

Kaikki

Kuvaus

Inclusion Criteria:

  1. Participants must have histologically and molecularly confirmed newly diagnosed World Health Organization (WHO) grade 3 or 4 glioma.

    1. Phase 1: any newly diagnosed HGG (including DMG of any location and primary spinal cord tumors).

    2. Phase 2:

      • Cohort 1: Newly diagnosed non-pontine, non-spinal cord HGG histone-wildtype.
      • Cohort 2: Newly diagnosed non-pontine, non-spinal cord H3K27 altered diffuse midline glioma (DMG).
      • Cohort 3: Newly diagnosed non-pontine, non-spinal cord H3G34 mutant diffuse hemispheric glioma (DHG).
  2. Prior surgery: must have undergone maximal safe resection. For patients with DMG of the pons, biopsy is sufficient.

  3. Prior Therapy: Participants must NOT have received ANY prior therapy (except surgery) before enrollment on study.

  4. Tumor Tissue Requirement: Participants must have sufficient tumor tissue (5-10 unstained formalin-fixed paraffin-embedded (FFPE) slides or a tumor block) for study enrollment.

  5. Age:

    Phase 1:

    o 3 to <18 years of age.

    Phase 2:

    • Cohort 1: 3 to 25 years of age.
    • Cohorts 2 & 3: 3 to 39 years of age.
  6. Performance Score: Karnofsky >= 50 for participants > 16 years of age and Lansky >= 50 for participants <=16 years of age. Participants who are unable to walk because of paralysis, but who are up in a wheelchair, will be considered ambulatory for the purpose of assessing the performance score.

  7. Corticosteroids: Participants who are receiving dexamethasone must be on a stable or decreasing dose for at least 1 week prior to registration.

  8. Organ Function Requirements:

    1. Peripheral absolute neutrophil count (ANC) >= 1000/mm^3.
    2. Platelet count >= 100,000/mm^3 (transfusion independent, defined as not receiving platelet transfusions for at least 7 days prior to enrollment).
    3. Creatinine Clearance (CrCl) or estimated glomerular filtration rate (eGFR) with cutoff value of ≥ 60 mL/min for renal function in participants with age ≥ 18 years. For participants < 18 years old, estimate eGFR using the Schwartz equation. eGFR (mL/min/1.73 m^2) = (k × Height (cm)) / Serum Creatinine (mg/dL).
    4. Total bilirubin <= 1.5 x upper limit of normal (ULN) for age; in presence of Gilbert's syndrome, total bilirubin < 3 x ULN or direct bilirubin < 1.5 x ULN.
    5. alanine aminotransferase (ALT) <= 3 x ULN.
    6. aspartate aminotransferase (AST) <= 3 x ULN.
    7. Participants with seizure disorder may be enrolled if well controlled. Participants on non-enzyme inducing anticonvulsants may be excluded pending interaction(s) with study drug.
  9. The effects of ADI-PEG 20 have been shown to be associated with embryofetal toxicity in rodents. For this reason and because chemotherapy used in this trial are known to be teratogenic, women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, for the duration of study participation and 4 months after completion of treatment. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately.

  10. A legal parent/guardian or participant must be able to understand, and willing to sign, a written informed consent and assent document, as appropriate.

  11. Participants must enroll on PNOC COMP if PNOC COMP is open to accrual at the enrolling institution.

Exclusion Criteria:

  1. Participants who have received any systemic therapy or RT, including any investigational agents.
  2. History of allergic reactions attributed to compounds of similar chemical or biologic composition to ADI-PEG 20 such as pegylated compounds.
  3. Phase 2 cohorts: tumors with epicenter in pons or spinal cord
  4. Participants with metastatic or leptomeningeal disease. Multi-focal disease should be discussed with the study chairs,
  5. Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection that would interfere with the study.
  6. Women of childbearing potential must not be pregnant or breast-feeding.
  7. Human immunodeficiency virus (HIV)-positive participants will be ineligible if HIV therapy regimen has not been stable for at least 4 weeks or there is intent to change the regimen within 8 weeks following enrollment, or if they are severely immunocompromised.
  8. Corrected QT Interval (QTc) cutoff >480 ms.

Important note: The eligibility criteria listed above are interpreted literally and cannot be waived.

Opintosuunnitelma

Tässä osiossa on tietoja tutkimussuunnitelmasta, mukaan lukien kuinka tutkimus on suunniteltu ja mitä tutkimuksella mitataan.

Miten tutkimus on suunniteltu?

Suunnittelun yksityiskohdat

  • Ensisijainen käyttötarkoitus: Hoito
  • Jako: Ei satunnaistettu
  • Inventiomalli: Peräkkäinen tehtävä
  • Naamiointi: Ei mitään (avoin tarra)

Aseet ja interventiot

Osallistujaryhmä / Arm
Interventio / Hoito
Kokeellinen: Phase 1 (Starting Dose: ADI-PEG 20 36mg/m^2)

Participants will receive injection of 36 mg/m^2 of ADI-PEG 20 once weekly in the concomitant phase and maintenance phases given prior to the start of RT. Participants will also receive daily oral (PO) temozolomide (TMZ) with dosage based on age and dosing phase (concomitant, then maintenance) starting on the same day as Radiotherapy (RT). RT will be given in standard fractions (total dose 59.4 Gy) over 6 weeks. The boost volume, when present, will receive an additional 5.4 Gy for a total of 59.4 Gy. Post-RT, Participants will continue to receive weekly ADI-PEG 20 as monotherapy and then proceed to first cycle of maintenance therapy 28 days (+7 days) after completion of RT, in the absence of dose-limiting toxicities (DLT) or progressive disease. The maintenance phase consists of ten cycles (28 days long) of combination chemotherapy with ADI-PEG 20 and TMZ. Participants will receive no more than 104 weeks of ADI-PEG 20 therapy

Given orally (PO)

Muut nimet:
  • TMZ

Undergo RT

Muut nimet:
  • RT
Kokeellinen: Phase 2 (Cohort 1) - Histone Wild Type (WT) HGG

Participants with WT HGG will be treated at the recommended phase 2 dose (RP2D) of ADI-PEG 20 determined in Phase 1 in combination with TMZ. Participants who complete the combined treatment and maintenance phase may continue receiving monotherapy treatment as extended maintenance for up to 10 additional cycles, provided there is no unacceptable toxicity, disease progression, or withdrawal of consent. ADI-PEG 20 treatment may continue for up to 104 weeks.

Given orally (PO)

Muut nimet:
  • TMZ

Undergo RT

Muut nimet:
  • RT

Given intramuscularly (IM)

Muut nimet:
  • ADI-PEG 20
Kokeellinen: Phase 2 (Cohort 2) - H3K27 Altered Diffuse Midline Gliomas (DMG)

Participants will be treated at the recommended phase 2 dose (RP2D) of ADI-PEG 20 determined in Phase 1. Participants who complete the combined treatment and maintenance phase may continue receiving monotherapy treatment as extended maintenance for up to 10 additional cycles, provided there is no unacceptable toxicity, disease progression, or withdrawal of consent. ADI-PEG 20 treatment may continue for up to 104 weeks. After completing the 30-day toxicity evaluation period, participants will enter follow-up. Follow-up procedures will be documented under the PNOC COMP protocol, except for protocol-defined follow-up procedures. Participants will be followed under the PNOC COMP protocol until death or withdrawal from the study.

Given orally (PO)

Muut nimet:
  • TMZ

Undergo RT

Muut nimet:
  • RT

Given intramuscularly (IM)

Muut nimet:
  • ADI-PEG 20
Kokeellinen: Phase 2 (Cohort 3) - H3G34 Mutant Diffuse Hemispheric Gliomas (DHG)

Participants will be treated at the recommended phase 2 dose (RP2D) of ADI-PEG 20 determined in Phase 1. Participants who complete the combined treatment and maintenance phase may continue receiving monotherapy treatment as extended maintenance for up to 10 additional cycles, provided there is no unacceptable toxicity, disease progression, or withdrawal of consent. ADI-PEG 20 treatment may continue for up to 104 weeks. After completing the 30-day toxicity evaluation period, participants will enter follow-up. Follow-up procedures will be documented under the PNOC COMP protocol, except for protocol-defined follow-up procedures. Participants will be followed under the PNOC COMP protocol until death or withdrawal from the study.

Given orally (PO)

Muut nimet:
  • TMZ

Undergo RT

Muut nimet:
  • RT

Given intramuscularly (IM)

Muut nimet:
  • ADI-PEG 20

Mitä tutkimuksessa mitataan?

Ensisijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Proportion of participants with Treatment-emergent Adverse Events (TrAE) (Phase 1)
Aikaikkuna: Up to 104 weeks

Proportion of participants in Phase 1 with treatment-emergent adverse events as graded by National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE version 5.0) will be reported.

Up to 104 weeks
Progression-Free Survival (PFS) for HGG histone-WT (Phase 2, Cohort 1)
Aikaikkuna: Up to 12 months

PFS for participants in Phase 2, Cohort 1 is defined as the median number of days participants remained progression free at 12 months. Participants without a documented tumor progression or death will be censored on the date of their last evaluable tumor assessment. Participants without a documented tumor progression or death before initiation of another anti-tumor therapy will be censored on the date of their last evaluable tumor assessment prior to or on the date of the new anti-tumor therapy. PFS estimates will be obtained from the Kaplan-Meier curve. An appropriate variance term that accounts for censoring Greenwood's formula) will be used to construct the 95% confidence intervals.

Up to 12 months
Progression-Free Survival (PFS) for H3K27 altered diffuse midline glioma (DMG) (Phase 2, Cohort 2)
Aikaikkuna: Up to 12 months

PFS for participants in Phase 2, Cohort 2 is defined as the median number of days participants remained progression free at 12 months. Participants without a documented tumor progression or death will be censored on the date of their last evaluable tumor assessment. Participants without a documented tumor progression or death before initiation of another anti-tumor therapy will be censored on the date of their last evaluable tumor assessment prior to or on the date of the new anti-tumor therapy. PFS estimates will be obtained from the Kaplan-Meier curve. An appropriate variance term that accounts for censoring Greenwood's formula) will be used to construct the 95% confidence intervals.

Up to 12 months
Progression-Free Survival (PFS) for H3G34 mutant diffuse hemispheric glioma (DHG) (Phase 2, Cohort 3)
Aikaikkuna: Up to 10 months

PFS for participants in Phase 2, Cohort 3 is defined as the median number of days participants remained progression free at 10 months. Participants without a documented tumor progression or death will be censored on the date of their last evaluable tumor assessment. Participants without a documented tumor progression or death before initiation of another anti-tumor therapy will be censored on the date of their last evaluable tumor assessment prior to or on the date of the new anti-tumor therapy. PFS estimates will be obtained from the Kaplan-Meier curve. An appropriate variance term that accounts for censoring Greenwood's formula) will be used to construct the 95% confidence intervals.

Up to 10 months

Yhteistyökumppanit ja tutkijat

Täältä löydät tähän tutkimukseen osallistuvat ihmiset ja organisaatiot.

Tutkijat

  • Päätutkija: Sabine Mueller, MD, PhD, University of California, San Francisco
  • Opintojen puheenjohtaja: Tom Davidson, MD, Children's Hospital Los Angeles

Opintojen ennätyspäivät

Nämä päivämäärät seuraavat ClinicalTrials.gov-sivustolle lähetettyjen tutkimustietueiden ja yhteenvetojen edistymistä. National Library of Medicine (NLM) tarkistaa tutkimustiedot ja raportoidut tulokset varmistaakseen, että ne täyttävät tietyt laadunvalvontastandardit, ennen kuin ne julkaistaan ​​julkisella verkkosivustolla.

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Ensimmäinen lähetetty

Keskiviikko 28. tammikuuta 2026

Ensimmäinen toimitettu, joka täytti QC-kriteerit

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Ensimmäinen Lähetetty (Todellinen)

Torstai 5. helmikuuta 2026

Tutkimustietojen päivitykset

Viimeisin päivitys julkaistu (Todellinen)

Maanantai 9. marraskuuta 2026

Viimeisin lähetetty päivitys, joka täytti QC-kriteerit

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Viimeksi vahvistettu

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Lisää tietoa

Tähän tutkimukseen liittyvät termit

Yksittäisten osallistujien tietojen suunnitelma (IPD)

Aiotko jakaa yksittäisten osallistujien tietoja (IPD)?

JOO

IPD-suunnitelman kuvaus

De-identified datasets will be shared with study collaborators during the course of the study.

Lääke- ja laitetiedot, tutkimusasiakirjat

Tutkii yhdysvaltalaista FDA sääntelemää lääkevalmistetta

Joo

Tutkii yhdysvaltalaista FDA sääntelemää laitetuotetta

Ei

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