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REDEL Trial: Reduced Elective Nodal Dose for Anal Cancer Toxicity Mitigation (REDEL)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT05902533
Recruitment Status : Recruiting
First Posted : June 15, 2023
Last Update Posted : February 23, 2024
Information provided by (Responsible Party):
Jordan Kharofa, University of Cincinnati

Brief Summary:
To determine the efficacy of reduced elective nodal radiation in anal cancer patients undergoing chemoradiation in reducing toxicity compared to standard nodal irradiation.

Condition or disease Intervention/treatment Phase
Anal Cancer Radiation: Radiation (reduced elective nodal dose (30.6 Gy) Drug: Capecitabine Drug: Mitomycin c Phase 2 Phase 3

Detailed Description:
This is a multi-center, single arm prospective trial to evaluate whether reduced elective nodal dose (30.6 Gy) reduces toxicity as defined by the CTCAE Toxicity Index compared to historic patients treated with standard nodal dose on NRG/RTOG0529 and patient reported GI toxicity using the validated PRO-CTCAE scale for diarrhea compared to historic patients treated on UC-GI-1601.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 33 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Intervention Model Description: Single arm prospective trial.
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: REDEL Trial: Reduced Elective Nodal Dose for Anal Cancer Toxicity Mitigation
Actual Study Start Date : August 14, 2023
Estimated Primary Completion Date : August 14, 2026
Estimated Study Completion Date : August 14, 2029

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Anal Cancer

Arm Intervention/treatment
Experimental: Reduced Elective Dose + Concurrent Capecitabine/Mitomycin C
Reduced elective nodal dose (30.6 Gy); (28- 30 fractions given M-F for approximately 5.5 to 6 weeks) Capecitabine 825 mg/m2 BID on days with RT Mitomycin C 10 mg/m2 slow IV push Days 1 and 29
Radiation: Radiation (reduced elective nodal dose (30.6 Gy)
28-30 fractions Monday through Friday of intended chemoradiation depending on the total dose required (50.4-54 Gy) which will occur over approximately 5.5 to 6 weeks.

Drug: Capecitabine
825 mg/m2 BID (Oral Twice daily on days with RT)

Drug: Mitomycin c
10 mg/m2 slow IV push Day 1 and 29

Primary Outcome Measures :
  1. Assess Toxicity Index for all GI, GU, Dermatologic, and Hematologic CTCAE events from treatment initiation through 90 days post treatment [ Time Frame: 90 days post treatment ]
    Toxicity Index for all GI, GU, Dermatologic, and Hematologic CTCAE events from treatment initiation through 90 days post treatment. In patients treated with IMRT enrolled to NRG/RTOG 0529, the mean GI/GU/Derm/Hem TI was 3.858 (SD=0.892) assessed during this time period with standard nodal dose using a simultaneous integrated boost technique. Thirty-three patients will allow an effect size of 0.4 with 80% power and one-sided alpha of 0.05. This effect size is larger than the difference in toxicity observed compared to the historic standard of 3D-conformal radiation with IMRT (current standard) and thus felt to represent a clinically meaningful difference. The CTCAE Toxicity index will be determined for all Dermatologic, Gastrointestinal, Genitourinary, and hematologic events within 90 days from treatment initiation that are possible, probably, or definitely attributable to treatment.

  2. Assess patient reported GI toxicity using PRO-CTCAE Diarrhea [ Time Frame: 9 weeks post treatment ]
    PRO-CTCAE Diarrhea will be used to assess patient reported GI toxicity for the primary endpoint at weeks 3, 5, and 9 (approximately 1-month post-treatment). Any high grade PRO-CTCAE Diarrhea (frequently/almost constantly) in week 3-9 was reported in 71% of patients on a prior trial in this population (UC-GI-1601) with standard nodal dose. With n=33 at alpha =0.05 (actual alpha=0.033) and power=0.80, we can detect a reduction in the proportion of patients reporting any PRO-CTCAE high grade diarrhea (week 3, 5, 9) of at least 22.3%.

Secondary Outcome Measures :
  1. Colostomy-Free-Survival - measured by follow up without colostomy [ Time Frame: 3 years (Patients followed 3 years post Treatment) ]
    Colostomy-Free-Survival - Time from treatment completion to any colostomy or last follow up without colostomy.

  2. Disease Free Survival measured by digital rectal exam [ Time Frame: 3 and 6 months post treatment ]
    Disease Free Survival - Failure to achieve complete response (CR) at 6 months or subsequent recurrence. There will be a documented clinical response assessment of the primary anal tumor primarily by using digital rectal exam at 3 and 6 months to define clinical complete response along with a review of imaging at 6 months. Any residual tumor at 6 months would be considered "failure to achieve a complete response" and would be considered a DFS event. Resolution of the primary tumor after chemoradiation and recurrence of tumor (any size) would be considered a DFS event. Persistence of disease in grossly enlarged lymph node (GTV Gross Nodes) at 6 months or resolution and then recurrence (any size) would be considered DFS event. New lesions in the elective nodal space or any other location will be considered a DFS event.

  3. Local Regional Recurrence [ Time Frame: 6 months post treatment ]
    Local Regional Recurrence - All failures within the PTVs for the primary tumor, for the involved Lymph Nodes, or for the Elective Lymph Nodes, including both patients who failed to achieve CR at 6 months and those occurring more than 6 months after completion of chemoradiation after initial CR.

  4. Overall Survival - measured by survival or death at follow up [ Time Frame: 3 years (Patients followed 3 years post Treatment) ]
    Overall Survival - Time from registration to death or last follow up

  5. Proportion of patients requiring a treatment break due to toxicity; measured by more than 3 consecutive fractions missed. [ Time Frame: Measured during the 5.5 - 6 week treatment period ]
    Treatment breaks- The proportion of patients requiring a treatment break due to toxicity (more than 3 consecutive fractions missed) will be monitored and reported. In RTOG 0529, 50% of patients treated with standard nodal dose required a treatment break.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Age ≥18 years.
  2. Patients must have stage T1-4N+M0 or T3/T4N0M0 locally advanced anal cancer as evidenced by a PET scan AND either a CT with contrast of the abdomen/pelvis or an MRI with contrast of the pelvis. All imaging must be from within 60 days prior to registration.

    1. Note: Patients with T2N0 disease will be allowed if the primary tumor is >4 cm. Patients with Stage I-T1N0M0 or Stage II-T2N0M0 (tumor ≤ 4cm) will be ineligible for participation.
    2. Patients with perianal cancer that is HPV associated (P16+) will be eligible if the tumor extends to the anal verge and the CTV will include the mesorectal, internal/external iliac, and inguinal lymph nodes.
    3. Patients with excision of the primary tumor but with node positive disease or residual disease at the primary if T3T4N0 will be eligible.
  3. ECOG performance status 0 or 1 (or Karnofsky ≥70, see Appendix A).
  4. Patients must be able to receive concurrent treatment with capecitabine and Mitomycin C in the opinion of the investigator.
  5. Creatinine Clearance must be > 30 ml/min.
  6. Ability to understand and the willingness to sign a written informed consent document.

Exclusion Criteria:

  1. Any prior pelvic radiation.
  2. History of allergic reactions attributed to compounds of similar chemical or biologic composition to capecitabine.
  3. Patients with uncontrolled intercurrent illness that in the opinion of the investigator would prevent receipt of radiation or capecitabine.

    a. Note: HIV-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial.

  4. Pregnant or breastfeeding women are excluded from this study.
  5. Patients with a prior or concurrent malignancy whose natural history or treatment has the potential to interfere with the safety or efficacy assessment of the investigational regimen in the opinion of the investigator.
  6. Patients with active autoimmune or connective tissue disease requiring systemic treatment are excluded from this study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT05902533

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Contact: UCCC Clinical Trials Office 513-584-7698
Contact: Jordan Kharofa, MD

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United States, Ohio
University of Cincinnati Medical Center Recruiting
Cincinnati, Ohio, United States, 45219
Contact: Christine Vollmer    513-213-3203   
Principal Investigator: Jordan Kharofa, MD         
United States, Vermont
University of Vermont Recruiting
Burlington, Vermont, United States, 05405
Contact: Emma Armstrong    802-656-2178   
Principal Investigator: Chris Anker, MD         
Sponsors and Collaborators
University of Cincinnati
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Responsible Party: Jordan Kharofa, Principal Investigator, University of Cincinnati Identifier: NCT05902533    
Other Study ID Numbers: UCCC-GI-23-01
First Posted: June 15, 2023    Key Record Dates
Last Update Posted: February 23, 2024
Last Verified: February 2024
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: Yes
Keywords provided by Jordan Kharofa, University of Cincinnati:
Toxicity Mitigation
Reduced Elective Nodal Dose
Additional relevant MeSH terms:
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Anus Neoplasms
Rectal Neoplasms
Colorectal Neoplasms
Intestinal Neoplasms
Gastrointestinal Neoplasms
Digestive System Neoplasms
Neoplasms by Site
Digestive System Diseases
Gastrointestinal Diseases
Intestinal Diseases
Anus Diseases
Rectal Diseases
Antimetabolites, Antineoplastic
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents
Antibiotics, Antineoplastic
Alkylating Agents
Nucleic Acid Synthesis Inhibitors
Enzyme Inhibitors