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Potentiation of Cetuximab by Tregs Depletion With CSA in Advanced Head & Neck Cancer

Potentiation of Cetuximab by Tregs Depletion With Metronomic Cyclophosphamide in Metastatic Squamous Cell Cancers of Head and Neck

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01581970
Enrollment
7
Registered
2012-04-20
Start date
2012-06-30
Completion date
2015-09-30
Last updated
2019-09-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Head and Neck Cancer, Head and Neck Squamous Cell Carcinoma

Keywords

head and neck cancer, metastatic squamous cell cancer

Brief summary

This is a feasibility study to assess the effectiveness of cetuximab when administered with low dose oral cyclophosphamide. Patients with metastatic squamous cell cancer of head and neck who have progressed on first line chemotherapy other than a cetuximab containing regimen will be treated with standard of care weekly cetuximab and twice daily low dose oral cyclophosphamide for 12 weeks.

Detailed description

In this study, patients with head and neck squamous cell carcinoma (HNSCC) will be given low-dose cyclophosphamide in combination with standard of care cetuximab. Tumor biopsies will be collected before and six weeks after treatment for measurement of tumor infiltration by effector cells, including CD8+ T cells, natural killer (NK) cells, and monocytes. In addition, the proportion of Regulatory T Cells (Tregs) to effector cells will be measured in peripheral blood at the same time points.

Interventions

DRUGCyclophosphamide

Patients will be given oral cyclophosphamide 50 mg twice daily to be self-administered starting the first day of therapy with weekly cetuximab for 12 weeks or until disease progression.

DRUGCetuximab

The initial dose of cetuximab 400 mg/m\^2 is administered over 120 minutes followed by weekly infusions of cetuximab 250 mg/m\^2 intravenously (IV) over 60 minutes.

Sponsors

Masonic Cancer Center, University of Minnesota
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Histologically documented squamous cell carcinoma of the head and neck (irrespective of site of primary - nasopharyngeal, oral cavity, oropharyngeal, laryngeal or unknown primary) that is metastatic/incurable and has progressed on a first line chemotherapy regimen. * Progression of measurable disease within the last 6 weeks based on Response Evaluation Criteria in Solid Tumors (RECIST) criteria * If the patient has received prior treatment with anti-epidermal growth factor receptor (EGFR) therapy as a part of definitive therapy concurrent with radiation, the time from the last cetuximab exposure must be \> 180 days. * Must be at least 30 days from prior treatment and have recovered from the reversible effects of previous anti-cancer treatment * Age ≥ 18 years * Eastern Cooperative Oncology Group (ECOG) Performance Status 0, 1 or 2 * Adequate bone marrow, renal and hepatic function within 14 days of study enrollment defined as: * Bone marrow: White blood cells (WBC) \> 3,000/uL; absolute neutrophil count \> 1,500/uL; platelets \> 100,000/uL * Renal: creatinine ≤ 2.5 times the institutional upper limit of normal (ULN) * Hepatic: total bilirubin \< 1.5 X institutional ULN; aspartate aminotransferase/alanine aminotransferase (AST\[SGOT\] and ALT\[SGPT\]) \< 2.5 X institutional ULN * Albumin \> 3.0 gm/dL * Women of childbearing potential and fertile men must be willing to use an acceptable method of birth control (i.e., a hormonal contraceptive, intra-uterine device, diaphragm with spermicide, condom with spermicide, or abstinence) for the duration of the study and for 60 days after the last dose of study drug. * Voluntary written consent before performance of any study-related procedure not part of normal medical care, with the understanding that consent may be withdrawn by the patient at any time without prejudice to future medical care

Exclusion criteria

* Pregnant or lactating - females of child bearing potential must have a negative pregnancy test within 14 days of study enrollment as cyclophosphamide is Pregnancy Category D * History of another active primary invasive cancer within the previous 2 years, excluding non-melanoma skin cancer * The patient is receiving concurrent treatment with other anticancer therapy, including chemotherapy, immunotherapy, hormonal therapy, radiotherapy (RT), chemoembolization, or targeted therapy. Patients receiving palliative radiation therapy to bony metastases prior to the first dose of study medication are eligible. * Chronic steroid dependence * Known HIV-positive patients and those with other acquired/inherited immunodeficiency hepatitis B, hepatitis C, connective tissue disease, or other clinical diagnosis, ongoing or intercurrent illness that in the Investigator's opinion should preclude the subject from participation * History of gastrointestinal disease causing malabsorption or obstruction such as, but not limited to Crohn's disease, celiac sprue, tropical sprue, bacterial overgrowth/blind loop syndrome, gastric bypass surgery, strictures, adhesions, achalasia, bowel obstruction, or extensive small bowel resection * Inability to take medications by mouth * History of allergic reactions attributed to compounds of similar chemical or biologic composition * Active autoimmune disease, chronic inflammatory condition, conditions requiring concurrent use of any systemic immunosuppressants or steroids. Mild-intermittent asthma requiring only occasional beta-agonist inhaler use or mild localized eczema will not be excluded. * Previous allo-transplant of any kind

Design outcomes

Primary

MeasureTime frameDescription
ProgressionAt 2 YearsThe number of patients without disease progression two years out from study enrollment. Progression of disease is defined by Response Evaluation Criteria in Solid Tumors (RECIST) criteria and is as at least a 20% increase in size of the lesion(s) being followed and/or the appearance of one or more new lesions.

Secondary

MeasureTime frameDescription
Aggregate Ratio of Tregs to Effector Cells for All Participants6 Weeks Post Treatment with CyclophosphamideThe ratio of Tregs to effector cells (NK cells, CD 8+ lymphocytes, macrophages/monocytes) in tumor tissue as measured by immune-histochemistry (IHC) of tumor tissue for all Participants. Measure of central tendency was collected but the data is not accessible anymore because PI left institution and did not respond to requests for data.
Aggregate Ratio of Tregs to Natural Killer (NK) Cells for All Participants6 Weeks Post Treatment with Cyclophosphamidethe Ratio of Tregs to NK cells in peripheral blood as measured by flow cytometry for all Participants. Measure of central tendency was collected but the data is not accessible anymore because the PI left institution and did not respond to requests for data.
Myeloid-derived Suppressor Cells in Tumor TissueWeek 6Myeloid-derived suppressor cells in tumor tissue as measured by immune-histochemistry (IHC)
Quality of Life ScoresComparison from Baseline to Week 6 and Week 12Comparison of health related quality of life scores as measured by FACT-G: Functional Assessment of Cancer Therapy - General (constitutes the core of all subscales; the FACT-G can be used with patients of any tumor type)questionnaire. At this point, the data is not able to be analyzed because the PI left the institution and did not respond to requests for data.
Overall Survival2 yearsDefined as the number of patients alive two years out from study enrollment.

Countries

United States

Participant flow

Participants by arm

ArmCount
Cetuximab/Low Dose Cyclophosphamide
Safety population as defined by all patients receiving at least one treatment with cyclophosphamide on Day 1. Cyclophosphamide: Patients will be given oral cyclophosphamide 50 mg twice daily to be self-administered starting the first day of therapy with weekly cetuximab for 12 weeks or until disease progression. Cetuximab: The initial dose of cetuximab 400 mg/m\^2 is administered over 120 minutes followed by weekly infusions of cetuximab 250 mg/m\^2 intravenously (IV) over 60 minutes.
7
Total7

Baseline characteristics

CharacteristicCetuximab/Low Dose Cyclophosphamide
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
4 Participants
Age, Categorical
Between 18 and 65 years
3 Participants
Sex: Female, Male
Female
3 Participants
Sex: Female, Male
Male
4 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
7 / 7
serious
Total, serious adverse events
1 / 7

Outcome results

Primary

Progression

The number of patients without disease progression two years out from study enrollment. Progression of disease is defined by Response Evaluation Criteria in Solid Tumors (RECIST) criteria and is as at least a 20% increase in size of the lesion(s) being followed and/or the appearance of one or more new lesions.

Time frame: At 2 Years

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cetuximab/Low Dose CyclophosphamideProgression1 Participants
Secondary

Aggregate Ratio of Tregs to Effector Cells for All Participants

The ratio of Tregs to effector cells (NK cells, CD 8+ lymphocytes, macrophages/monocytes) in tumor tissue as measured by immune-histochemistry (IHC) of tumor tissue for all Participants. Measure of central tendency was collected but the data is not accessible anymore because PI left institution and did not respond to requests for data.

Time frame: 6 Weeks Post Treatment with Cyclophosphamide

ArmMeasureValue (NUMBER)
Cetuximab/Low Dose CyclophosphamideAggregate Ratio of Tregs to Effector Cells for All Participants0.112 ratio
Secondary

Aggregate Ratio of Tregs to Natural Killer (NK) Cells for All Participants

the Ratio of Tregs to NK cells in peripheral blood as measured by flow cytometry for all Participants. Measure of central tendency was collected but the data is not accessible anymore because the PI left institution and did not respond to requests for data.

Time frame: 6 Weeks Post Treatment with Cyclophosphamide

Population: Measure of central tendency could not be used as the data was not originally reported in this manner and is not accessible anymore because the PI left institution and did not respond to requests for data.

ArmMeasureValue (NUMBER)
Cetuximab/Low Dose CyclophosphamideAggregate Ratio of Tregs to Natural Killer (NK) Cells for All Participants2.443 ratio
Secondary

Myeloid-derived Suppressor Cells in Tumor Tissue

Myeloid-derived suppressor cells in tumor tissue as measured by immune-histochemistry (IHC)

Time frame: Week 6

Population: This outcome measure was considered to not be helpful and the data was not collected.

Secondary

Overall Survival

Defined as the number of patients alive two years out from study enrollment.

Time frame: 2 years

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Cetuximab/Low Dose CyclophosphamideOverall Survival1 Participants
Secondary

Quality of Life Scores

Comparison of health related quality of life scores as measured by FACT-G: Functional Assessment of Cancer Therapy - General (constitutes the core of all subscales; the FACT-G can be used with patients of any tumor type)questionnaire. At this point, the data is not able to be analyzed because the PI left the institution and did not respond to requests for data.

Time frame: Comparison from Baseline to Week 6 and Week 12

Population: At this point, the data is not able to be analyzed because the PI left the institution and did not respond to requests for data.

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026