HYHOPE: De-intensified Hypofractionated Radiation Therapy for HPV-associated Oropharynx Cancer

HYHOPE: Phase I Study of De-intensified Hypofractionated Radiation Therapy for Human Papilloma Virus-associated Oropharynx Cancer

This is a single arm Phase I study of de-intensified hypofractionated radiation therapy for favorable human papilloma virus-associated oropharynx cancer. It will evaluate the tolerability of a de-intensified hypofractionated radiation therapy regimen completed in 3 weeks (with equivalent biologically effective dose to 60 Gy in 30 fractions) with concurrent weekly cisplatin.

Study Overview

• Status: Completed
• Conditions: Oropharyngeal Cancer; Human Papillomavirus-Related Carcinoma
• Intervention / Treatment: Radiation: Hypofractionated intensity modulated radiotherapy

Detailed Description

Standard of care radiation therapy (RT) for head and neck squamous cell carcinoma (HNSCC) involves conventional fractionation delivered over a course of 7 weeks. Although hypofractionated RT (HFRT) delivering higher dose of RT each day over a shorter overall treatment time has been studied and adopted as standard of care in many disease sites including breast and prostate cancers, data on HFRT in HNSCC is limited.

There is a strong radiobiological rationale for HFRT for HNSCC to decrease the overall treatment time and thus the effects of accelerated repopulation in this disease entity. In addition, if similar outcomes can be achieved with a reduced number of fractions, cost effectiveness of care can be improved while minimizing the disruption to the patient's personal and professional lives. A substantial decrease in treatment time may improve compliance and financial toxicity associated with the patient's oncologic treatment.

The global COVID-19 pandemic is highlighting the health risk to society at large of having no viable alternative to a 7 week daily RT course for HNSCC, especially in the setting of compromised immune systems associated with concurrent chemotherapy frequently used in this patient population. Thus, the study of HFRT for HNSCC is both timely and potentially paradigm changing for practices across the United States.

The incidence of human papilloma virus (HPV)-associated oropharynx cancer is increasing in the United States, now accounting for 70-80% of all oropharynx cancers. It has a favorable prognosis vs. non-HPV-associated cancers and studies are ongoing to determine the best strategy to de-intensified therapy while maintaining good oncologic outcomes.

The purpose of this single-arm Phase I study is to assess the tolerability and signal for efficacy of de-intensified HFRT for favorable HPV-associated oropharynx cancer. De-intensification will be achieved in two ways. First, the equivalent biologically effective dose (BED) of HFRT used on trial will be 60 Gy of conventionally fractionationated RT (vs. the current standard of care of 70 Gy). Second, the elective nodal volume irradiated will be limited to involved nodal levels and one immediately adjacent level (vs. the current standard of care of entire bilateral neck nodal regions). Patients will complete RT in 15 fractions (3 weeks) with concurrent weekly cisplatin on dose level 0. If a 3-week regimen is not well-tolerated, a 20 fraction regimen will be used on dose level -1.

• Study Type: Interventional
• Enrollment (Actual): 24
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Texas
    • Dallas, Texas, United States, 75390
      • University of Texas Southwestern Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Pathologically-proven diagnosis of T1-3 (up to 6 cm), N0-2 (AJCC 8th edition) p16 positive squamous cell carcinoma of the oropharynx (except T1-2N0 as noted in the exclusion criteria)
2. ≤10 pack-year smoking history and not actively smoking
3. Age ≥18 years
4. ECOG performance status 0-2 or Karnofsky Performance Status 50-100

5. 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 for 90 days following completion of therapy. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately.

   A female of child-bearing potential is any woman (regardless of sexual orientation, marital status, having undergone a tubal ligation, or remaining celibate by choice) who meets the following criteria: Has not undergone a hysterectomy or bilateral oophorectomy; or has not been naturally postmenopausal for at least 12 consecutive months (i.e., has had menses at any time in the preceding 12 consecutive months).

6. Negative serum or urine pregnancy test within 2 weeks before registration for women of childbearing potential.
7. Ability to understand and the willingness to sign a written informed consent.

Exclusion Criteria:

1. Distant metastasis
2. T1-2N0 (AJCC 8th edition) p16 positive squamous cell carcinoma of the oropharynx (candidates for definitive RT alone or surgery alone)
3. Inability to receive concurrent weekly cisplatin due to comorbid conditions
4. Synchronous non-skin cancer primaries outside of the oropharynx, oral cavity, larynx, and hypopharynx except for low- and intermediate-risk prostate cancer and well-differentiated thyroid cancer. For prostate cancer, patient should not be receiving active treatment. For thyroid cancer, thyroid surgery may occur before or after radiation treatment, provided all other eligibility criteria are met.
5. Prior invasive malignancy with an expected disease-free interval of less than 3 years
6. Prior radiotherapy to the region of the study cancer that would result in overlap of radiation fields
7. Subjects may not be receiving any other investigational agents for the treatment of the cancer under study.
8. History of allergic reactions attributed to compounds of similar chemical or biologic composition to the chemotherapy agents in this study
9. Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that, in the opinion of the investigator, would limit compliance with study requirements
10. Subjects must not be pregnant or nursing due to the potential for congenital abnormalities and the potential of this regimen to harm nursing infants.
11. History of severe immunosuppression, including HIV, organ or autologous or allogeneic stem cell transplant, or active immunosuppressive medication at the time of enrollment

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Hypofractionated radiotherapy with concurrent chemotherapy (weekly cisplatin 40 mg/m2); Level 0: 46.5 Gy in 15 fractions, 5 fractions/week Level -1: 52 Gy in 20 fractions, 5 fractions/week	Radiation: Hypofractionated intensity modulated radiotherapy; Hypofractionated intensity modulated radiotherapy with concurrent chemotherapy (weekly cisplatin)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Maximally Tolerated Dose/Fractionation of Hypofractionated Radiation Therapy	The number of participants experiencing dose-limiting toxicities (DLTs) will be used to determine the maximally tolerated dose (MTD) or optimal fractionation of hypofractionated radiation therapy. Level 0: 46.5 Gy in 15 fractions Level -1: 52 Gy in 20 fractions	3 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Clinician-reported Acute Toxicities	Toxicities as measured by CTCAE v5.0	0-3 months
Clinician-reported Late Toxicities	As measured by CTCAE v5.0	3-12 months
Percentage of Participants With Locoregional Control	Locoregional control defined as freedom from locoregional recurrence. Locoregional recurrence defined as biopsy-proven viable cancer originating from the primary tumor site (i.e. oropharynx) or a lymph node basin above the clavicles.	12 months
Percentage of Participants With Progression Free Survival	Progression-free survival defined as time from start of treatment to time of progression or death.	1-12 months
Percentage of Participants With Overall Survival	Overall survival defined as time from start of treatment o time of death.	24 months
Swallowing-related Patient-reported Quality of Life	Change from baseline in swallowing-related quality of life, as measured by the MD Anderson Dysphagia Inventory (MDADI) total score, assessed at specified time points (baseline,1, 3, 6, and 12 months) during and after treatment. Higher scores indicate better function, 0-100. Analyses were descriptive, and a paired t test was used to compare questionnaire results over time with P < .05 considered statistically significant. MDADI composite score difference of 10 was deemed clinically meaningful.	1-12 months
Head and Neck Patient-reported Quality of Life	Change from baseline in head and neck patient-reported outcomes quality of life, as measured by the University of Washington Quality of Life questionnaire (UW-QOL), assessed at specified time points (baseline,1, 3, 6, and 12 months) during and after treatment. Higher scores on UW-QOL subscales indicate better quality of life, 0 being worst and 100 being the best outcome. A paired t test was used to compare questionnaire results over time with P < .05 considered statistically significant. UW-QOL was divided into 2 subscales of physical and social-emotional function with change of 0.5 x standard deviation (SD) and 0.8 x SD considered moderate and large effect, respectively. Scale title: Patient-reported quality of life at baseline and after treatment (0-100) Physical UW-QOL minimum: 45.83 Physical UW-QOL maximum: 100 Social-Emotional UW-QOL minimum: 17.5 Social-Emotional UW-QOL maximum: 100	1-12 months
General Patient-reported Quality of Life	EuroQol-5 dimensions (EQ-5D-5L): 1-5, higher scores mean worse quality of life. Index score: 0-1, higher scores mean better quality of life. Visual Analog scale: 0-100, higher scores mean better quality of life.	1-12 months
Feeding Tube Dependence	Dependence on tube feeds defined as any participant with daily use of ≥2 nutritional supplements per day via the feeding tube at the time of evaluation.	1-12 months

Collaborators and Investigators

• Sponsor: University of Texas Southwestern Medical Center
• Collaborators: Gateway for Cancer Research
• Investigators: Principal Investigator: Dominic Moon, MD, UT Southwestern Medical Center

Study record dates

Study Major Dates

• Study Start (Actual): December 3, 2020
• Primary Completion (Actual): December 20, 2024
• Study Completion (Actual): December 20, 2024

Study Registration Dates

• First Submitted: October 1, 2020
• First Submitted That Met QC Criteria: October 1, 2020
• First Posted (Actual): October 8, 2020

Study Record Updates

• Last Update Posted (Estimated): December 15, 2025
• Last Update Submitted That Met QC Criteria: November 19, 2025
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Keywords: Radiation Dose Hypofractionation
• Additional Relevant MeSH Terms: Stomatognathic Diseases; Neoplasms by Site; Neoplasms; Head and Neck Neoplasms; Otorhinolaryngologic Diseases; Pharyngeal Neoplasms; Otorhinolaryngologic Neoplasms; Pharyngeal Diseases; Oropharyngeal Neoplasms
• Other Study ID Numbers: STU-2020-1079

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No