The Combination of Anti-PD-1 With Radiotherapy in Previously Untreated Metastatic Melanoma

Study Purpose

Currently, the first line treatment options for surgically unresectable metastatic melanoma includes anti-PD1 agents such as nivolumab and pembrolizumab. In western countries, UV associated cutaneous melanoma has 30-40% response rates to immune checkpoint inhibitors (ICIs). However, response rates are lower in Asians. The reason for this discrepancy is attributed to the difference in subtypes since most of the Asian patients are mostly subgrouped as acral lentiginous or mucosal types that are unrelated to UV exposures. Thus, there is an unmet need to bolster the effect of ICIs in these patients. The combination of radiotherapy with ICIs have been demonstrated by several pre-clinical studies. High dose radiation has shown to promote STING pathway which activates dendritic cells needed in priming phase. In addition, low dose radiation may activate macrophage differentiation. These mechanisms in turn may enhance responses to immunotherapy. In this study, the investigators aim to evaluate the efficacy and tolerability of anti-PD-1 blockade in combination with radiotherapy in surgically unresectable, treatment naive metastatic melanoma.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 20 Years - 80 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - 1.
Subject has provided informed consent prior to initiation of any study-specific activities/procedures
  • - 2.
Male or female age > 20 years at the time of informed consent
  • - 3.
Histologically confirmed diagnosis of unresectable stage III or IV melanoma as per AJCC staging system 8th edition
  • - 4.
Subject with no prior systemic treatment
  • - 5.
Eastern Cooperative Oncology Group (ECOG) Performance Status < 1
  • - 6.
Screening labs performed within 7 days of randomization demonstrating adequate hematologic, coagulation, liver, and kidney functions
  • - 7.
Indications for radiotherapy
  • - 8.
BRAF status must be checked, but patient is eligible regardless of BRAF mutations (BRAF V600 wild type or BRAF V600 mutation positive are both eligible)

Exclusion Criteria:

  • - 1.
Ocular melanoma
  • - 2.
Active brain metastasis (stable after 1 month of radiotherapy, gamma knife surgery or surgery)
  • - 3.
Requires palliative radiotherapy
  • - 4.
Previous treatment with chemotherapy, a CTLA-4 or PD-1/PD-L1 antagonist agent, including treatment in adjuvant setting
  • - 5.
Autoimmune disease requiring chronic treatment with systemic corticosteroids or any other immunosuppressive agents 7 days prior to inclusion. (physiologic dose of prednisolone 10mg or equivalent are accepted)
  • - 6.
Concurrent medical disease which would significantly limit full compliance with the study such as, but not limited to the following: heart failure (III, IV as per NYHA classification), renal insufficiency, active infection (requires negative gest for clinically suspected HIV, hepatitis B virus, hepatitis C virus). If positive results are not indicative of true active or chronic infection, the subject may enter the study after discussion and agreement between the investigator and medical director.
  • - 7.
Has known malignancy that is progressing and requires active treatment
  • - 8.
Has known psychiatric or substance abuse disorders that would interfere with cooperation requirements of the trial
  • - 9.
Lack of availability for clinical follow-up assessments

Trial Details

Trial ID:

This trial id was obtained from, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Phase 2
Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Yonsei University
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator Affiliation N/A
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries Korea, Republic of

The disease, disorder, syndrome, illness, or injury that is being studied.

Arms & Interventions


Experimental: Experimental


Drug: - The combination of radiotherapy with anti-PD1 (pembrolizumab or nivolumab)

Subjects with treatment naïve, surgically unresectable metastatic melanoma stages IIIB to IVM1c will be treated with combination of anti-PD1 (pembrolizumab or nivolumab) and radiotherapy.

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

International Sites

Seoul, Korea, Republic of




Department of Surgery, Yonsei University College of Medicine

Seoul, , 120-752

Site Contact

Sang-Joon Shin, MD, Ph.D


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