(PROGRESS) A Phase I and Open Label, Randomized, Controlled Phase II Study Testing the Safety, Toxicities, and Efficacy of MK-3475 in Combination With MRI-guided Laser Ablation in Recurrent Malignant Gliomas


The blood brain barrier (BBB) is a major obstacle to drug delivery in the treatment of malignant brain tumors including Glioblastoma multiforme (GBM). MRI-guided laser ablation (MLA) has been noted to disrupt peritumoral BBB, which could then lead to increased access of new tumor antigens to the lymphovascular system and vice versa of immune effector cells to the tumor for effective activation of the immune system.

Therefore the combination of MK-3475 and MLA as proposed in this protocol is hypothesized to create a therapeutic synergy in which MLA increases material access to promote immune activation and then MK-3475 maximizes these tumor-specific immune reactions to impart effective tumor control.


  • 18 years old and older 
  • Disease: Brain tumor
  • Disease type: Recurrent Glioblastoma Multiforme (GBM)

For additional information about eligibility criteria, please contact the study coordinator :Deborah Sampson


18 to 65
65 and over



Can be done from home



Brain Tumors, Glioblastoma multiforme, Metastatic brain tumor, Glioma, Brain Tumor

Principal Investigator

David D Tran, M.D.



Contact Information


(352) 273-9000

Be an Informed Participant

Before deciding to participate in a research study, take time to learn about clinical research, how it's conducted and your rights as a research participant. Following are some helpful resources from independent sources. Always remember that a clinical research study is research, not treatment.

Know Who to Contact

  • Eligibility: For questions about a specific study and who is eligible to participate, call or email the contact person listed for that study.
  • Your Rights: For questions about your rights as a research participant, contact the UF Institutional Review Boards at 352-273-9600.
  • Feedback: For general questions or feedback about study listings, email the UF Clinical and Translational Science Institute at UFStudies@health.ufl.edu.

Other Resources

  • HealthStreet: Health-focused services, classes and events, and opportunities to participate in research.
  • ResearchMatch.org: Join a national registry of volunteers willing to be contacted about research studies.

For Research Teams