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Kortdurende bestralingstherapie en combinatiechemotherapie voor de behandeling van stadium II-III rectumkanker

3 november 2026 bijgewerkt door: Jonsson Comprehensive Cancer Center

Orgaanbehoud voor patiënten met lokaal gevorderd rectaal adenocarcinoom: evaluatie van de werkzaamheid van kortdurende bestralingstherapie gevolgd door FOLFOX of CapeOX

This phase I trial investigates how well short-course radiation therapy followed by combination chemotherapy works in treating patients with stage II-III rectal cancer. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Chemotherapy drugs, such as leucovorin, fluorouracil, oxaliplatin, and capecitabine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving short-course radiation therapy and combination chemotherapy may reduce the need for surgery and therefore improve quality of life.

Studie Overzicht

Gedetailleerde beschrijving

PRIMARY OBJECTIVE:

I. Complete clinical response (cCR) rate of patients with clinical T3 and/or node-positive M0 rectal cancer being treated with short-course radiation therapy (SCRT) followed by 16 weeks of modified leucovorin, fluorouracil, and oxaliplatin (mFOLFOX)/capecitabine and oxaliplatin (CapeOX).

SECONDARY OBJECTIVES:

I. 1-year local recurrence free survival and 1-year progression free survival of the entire cohort, the cohort that initially undergoes non-operative management (NOM), and the cohort that initially undergoes total mesorectal excision (TME).

II. Physician-reported acute and late >= grade 3 toxicity rates. III. 1-year post-treatment patient health-related quality of life and anorectal function as per Patient Reported Outcomes Measurement and Information System (PROMIS).

IV. Explore how Signatera's residual disease test correlates with patient's cCR rates, local recurrence, progression-free, and overall survival rates.

V. Explore radiomics features from longitudinal diffusion weighted magnetic resonance imaging (MRI) (diffusion weighted imaging [DWI]) data and build a predictive model for treatment effect (complete response) in rectal cancer patients undergoing SCRT.

OUTLINE:

Patients undergo SCRT in the form of intensity-modulated radiation therapy (IMRT) over 5 fractions daily for 5 consecutive days. Beginning 11-18 days after the last day of radiation therapy, patients receive either oxaliplatin intravenously (IV) and leucovorin IV on day 1 and fluorouracil IV on days 1-3 (mFOLFOX6) or oxaliplatin IV on day 1 and capecitabine orally (PO) twice daily (BID) on days 1-14 (CapeOX). Treatment with mFOLFOX6 repeats every 2 weeks for up to 8 cycles, and treatment with CapeOX repeats every 3 weeks for up to 6 cycles in the absence of disease progression or unacceptable toxicity. At 8-12 weeks after completion of all therapy, patients with residual tumor undergo TME. Patients with cCR undergo NOM.

After completion of study treatment, patients who underwent NOM are followed up every 3 months for 2 years, then every 6 months for 3 years. TME patients are followed up every 3-6 months for 2 years, then every 6 months for 3 years.

Studietype

Ingrijpend

Inschrijving (Geschat)

25

Fase

  • 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

    • California
      • Los Angeles, California, Verenigde Staten, 90095
        • Werving
        • UCLA / Jonsson Comprehensive Cancer Center
        • Contact:
        • Hoofdonderzoeker:
          • Ann Raldow

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

18 jaar en ouder (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  • Histologically confirmed rectal adenocarcinoma
  • Patients must have stage II (cT3, cN0) or stage III (cT1-3, cN1-3) tumor as staged by MRI
  • No evidence of metastatic disease
  • Resectable primary lesion
  • Karnofsky performance status (KPS) >= 70 or Eastern Cooperative Oncology Group (ECOG) 0-2
  • Absolute neutrophil count (ANC) > 1.5 cell/mm^3
  • Hemoglobin (Hgb) > 8.0 gm/dL
  • Platelets (PLT) > 150,000/mm^3
  • Total bilirubin < or equal to 1.5 x upper limit of normal
  • Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) < or equal to three times upper limit of normal
  • If a woman is of childbearing potential, a negative serum pregnancy test must be documented prior to initiation of radiation therapy

Exclusion Criteria:

  • Active treatment of a separate malignancy
  • Distant metastatic disease as assessed by staging positron emission tomography (PET)/computed tomography (CT) or CT of the chest and abdomen within 6 weeks of starting radiation therapy
  • Prior radiotherapy to the region of the study cancer that would result in overlap of radiation therapy fields
  • Pregnant and/or breastfeeding
  • Medical/psychological contraindication to MRI

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: NVT
  • Interventioneel model: Opdracht voor een enkele groep
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Treatment (IMRT, mFOLFOX6, CapeOX, TME)

Patients undergo SCRT in the form of IMRT over 5 fractions daily for 5 consecutive days. Beginning 11-18 days after the last day of radiation therapy, patients receive either oxaliplatin IV and leucovorin IV on day 1 and fluorouracil IV on days 1-3 (mFOLFOX6) or oxaliplatin IV on day 1 and capecitabine PO BID on days 1-14 (CapeOX). Treatment with mFOLFOX6 repeats every 2 weeks for up to 8 cycles, and treatment with CapeOX repeats every 3 weeks for up to 6 cycles in the absence of disease progression or unacceptable toxicity. At 8-12 weeks after completion of all therapy, patients with residual tumor undergo TME. Patients with cCR undergo NOM.

Ancillary studies

Andere namen:
  • Beoordeling van de kwaliteit van leven

Given IV

Andere namen:
  • 5-Fluracil
  • Fluracil
  • 5 Fluorouracil
  • 5 Fluorouracilum
  • 5FU
  • 5-Fluor-2,4(1H,3H)-pyrimidinedion
  • 5-Fluorouracil
  • 5-Fu
  • AccuSite
  • Carac
  • Fluor Uracil
  • Fluoracil
  • Flurablastine
  • Fluracedyl
  • Fluril
  • Fluroblastine
  • Ribofluor
  • Ro 2-9757
  • Ro-2-9757

Given IV

Andere namen:
  • 1-OHP
  • Dacotin
  • Dacplat
  • Eloxatin
  • Ai Heng
  • Aiheng
  • Diaminocyclohexaan Oxalatoplatina
  • Eloxatine
  • JM-83
  • Oxalatoplatine
  • Oxalatoplatina
  • RP 54780
  • RP-54780
  • SR-96669

Given IV

Andere namen:
  • Folinezuur

Undergo IMRT

Andere namen:
  • IMRT
  • Intensiteit gemoduleerde RT
  • Intensiteitsgemoduleerde radiotherapie
  • Straling, intensiteitsgemoduleerde radiotherapie

Undergo TME

Andere namen:
  • TME

Given IV

Andere namen:
  • Xeloda
  • Ro 09-1978/000

Undergo NOM

Andere namen:
  • Epidemiologie / Surveillance

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Complete clinical response rate
Tijdsspanne: Up to 5 years

Kaplan-Meier analysis will be carried out and used to estimate for the entire cohort as well the non-operational management (NOM) and total mesorectal excision (TME) cohorts separately.

Up to 5 years

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Local recurrence-free survival
Tijdsspanne: At 1 year

Kaplan-Meier analysis will be carried out and used to estimate for the entire cohort as well the NOM and TME cohorts separately.

At 1 year
Progression-free survival
Tijdsspanne: At 1 year

Kaplan-Meier analysis will be carried out and used to estimate for the entire cohort as well the NOM and TME cohorts separately.

At 1 year
Incidence of adverse events
Tijdsspanne: Up to 5 years

Physician-reported acute and late >= grade 3 toxicity rates for the entire cohort will be graded according to Common Terminology Criteria for Adverse Events version 5.0.

Up to 5 years
Health-related quality of life
Tijdsspanne: At 1 year

Will be assessed by Patient Reported Outcomes Measurement and Information System and calculated and presented as a composite score. These scores will be calculated for the entire cohort as well as the NOM and TME cohorts separately.

At 1 year
Anorectal function
Tijdsspanne: At 1 year

Will be assessed by Patient Reported Outcomes Measurement and Information System and calculated and presented as a composite score. These scores will be calculated for the entire cohort as well as the NOM and TME cohorts separately.

At 1 year
Signatera's residual disease test
Tijdsspanne: Up to 5 years

Cox proportional hazards regression analysis will be used to assess the association of circulating tumor deoxyribonucleic acid with clinical response rates, local recurrent, progression-free, and overall survival rates.

Up to 5 years
Prediction of complete clinical response rate status by radiomics
Tijdsspanne: Up to 5 years

The relationship between complete clinical response as a binary variable and longitudinal radiomics features from a sequence of four diffusion weighted imaging data points will be assessed via a logistic regression model with a random effect term to account for within-subject correlation.

Up to 5 years

Medewerkers en onderzoekers

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

Onderzoekers

  • Hoofdonderzoeker: Ann Raldow, UCLA / Jonsson Comprehensive Cancer Center

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)

11 februari 2021

Primaire voltooiing (Werkelijk)

3 juli 2025

Studie voltooiing (Geschat)

15 oktober 2027

Studieregistratiedata

Eerst ingediend

7 januari 2021

Eerst ingediend dat voldeed aan de QC-criteria

7 januari 2021

Eerst geplaatst (Werkelijk)

11 januari 2021

Updates van studierecords

Laatste update geplaatst (Werkelijk)

5 november 2026

Laatste update ingediend die voldeed aan QC-criteria

3 november 2026

Laatst geverifieerd

1 maart 2026

Meer informatie

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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