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Combining Pembrolizumab and Metformin in Metastatic Head and Neck Cancer Patients

A Phase 2 Feasibility Study Combining Pembrolizumab and Metformin to Harness the Natural Killer Cytotoxic Response in Metastatic Head and Neck Cancer Patients

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04414540
Enrollment
21
Registered
2020-06-04
Start date
2020-08-31
Completion date
2026-09-30
Last updated
2026-05-08

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

Conditions

Head and Neck Squamous Cell Carcinoma

Brief summary

The purpose of this study is to determine anti-tumor activity by measuring overall response rate in recurrent and/or metastatic HNSCC patients receiving the combination of metformin and pembrolizumab.

Detailed description

Recurrent and/or metastatic HNSCC patients will be treated with combination of metformin and pembrolizumab. Patients will be randomized into arms 1 and 2, to either receive Metformin prior to pembrolizumab or to begin Metformin after pembrolizumab treatment begins. The patients are randomized for the exploratory endpoints in order to better understand the difference of effects of metformin versus pembrolizumab on the immune system although efficacy is based on combination.

Interventions

Metformin ER starting dose 1000mg daily Metformin ER escalation dose 2000mg daily

DRUGPembrolizumab

Pembrolizumab q 3 weeks

Sponsors

Trisha Wise-Draper
Lead SponsorOTHER
American Cancer Society, Inc.
CollaboratorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Patients will be on one of two arms that will be studied in parallel.

Eligibility

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

Inclusion criteria

* Histologically or cytologically confirmed recurrent or metastatic non-cutaneous HNSCC for which there are no surgical or radiation curative options. * Patients may have received up to 3 prior lines of therapy for metastatic or recurrent disease. * ECOG performance status ≤2

Exclusion criteria

* Patients with nasopharyngeal HNSCC will be excluded * Patients who have had chemotherapy or radiotherapy within 2 weeks prior to entering the study. * Patients who have not recovered from adverse events due to prior anti-cancer therapy * Patients who have previously received PD-1 or PD-L1 inhibitors for metastatic/recurrent disease * Patients currently receiving metformin or who have received metformin in the last 6 months

Design outcomes

Primary

MeasureTime frameDescription
Overall Response Rate by RECIST 1.1 and iRECISTUp to 2 years after completion of study treatmentA complete response is defined as the disappearance of all target lesions, with any affected lymph nodes reduced to less than 10 mm. A partial response occurs when there is at least a 30% reduction in the total size of target lesions compared with baseline. Progressive disease is indicated by at least a 20% increase in lesion size (with a minimum absolute increase of 5 mm) or the appearance of new lesions. Stable disease describes cases where tumor size changes do not meet criteria for partial response or progressive disease.

Secondary

MeasureTime frameDescription
Number of Patients With Adverse Events Measured by CTCAE v5.02 yearsTo observe and record safety of combination in metastatic Head and Neck Squamous Cell Carcinoma (HNSCC) patients receiving the combination of metformin and pembrolizumab. AEs will be graded and recorded according to NCI CTCAE Version 5.0.
Progression Free Survival (PFS)1 yearTo observe and record progression free survival in recurrent and/or metastatic HNSCC patients receiving the combination of metformin and pembrolizumab.
Overall Survival (OS)1 yearOverall survival was analyzed using the Kaplan-Meier method. The reported 1-year overall survival percentages represent Kaplan-Meier-estimated probabilities of survival at 1 year and do not correspond to the observed proportion of participants alive or deceased due to censoring. Observed all-cause mortality is reported separately as the number of participants who died due to any cause in each arm.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORTrisha Wise-Draper, MD, PhD

University of Cincinnati

Baseline characteristics

Characteristic
Age, Continuous64 years
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
21 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
1 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
20 Participants
Region of Enrollment
United States
21 participants
Sex: Female, Male
Female
5 Participants
Sex: Female, Male
Male
7 Participants
Smoking History (>=10 pack years)8 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
6 / 108 / 11
other
Total, other adverse events
10 / 1011 / 11
serious
Total, serious adverse events
3 / 104 / 11

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 9, 2026