Pilot Immunotherapy Trial for Recurrent Malignant Gliomas

• Status: Completed
• Trial end date: 2013-06-25
• Target enrollment: 0
• Participant gender: All

Summary

This human Phase I trial involves taking the patient's own tumor cells during surgical craniotomy, treating them with an investigational new drug (an antisense molecule) designed to shut down a targeted surface receptor protein, and re-implanting the cells, now encapsulated in small diffusion chambers the size of a dime in the patient's abdomen within 24 hours after the surgery. Loss of the surface receptor causes the tumor cells to die in a process called apoptosis. As the tumor cells die, they release small particles called exosomes, each full of tumor antigens. It is believed that these exosomes as well as the presence of the antisense molecule work together to activate the immune system against the tumor as they slowly diffuse out of the chamber. This combination product therefore serves as a slow-release antigen depot. Immune cells are immediately available for activation outside of the chamber because a wound was created to implant these tumor cells and a foreign body (the chamber) is present in the wound. The wound and the chamber fortify the initial immune response which eventually leads to the activation of immune system T cells that attack and eliminate the tumor. By training the immune system to recognize the tumor, the patient is also protected through immune surveillance from later tumor growth should the tumor recur. Compared to the other immunotherapy strategies, this treatment marshalls the native immune system (specifically the antigen presenting cells, or dendritic cells) rather than engineering the differentiation of these immune cells and re-injecting them. Compared to traditional treatment alternatives for tumor recurrence, including a boost of further radiation and more chemotherapy, this treatment represents potentially greater benefit with fewer risks.

This combination product serves as a therapeutic vaccine with an acceptable safety profile, which activates an anti-tumor adaptive immune response resulting in radiographic tumor regression.

• Phase: Phase 1
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Sidney Kimmel Cancer Center at Thomas Jefferson University; Thomas Jefferson University

Criteria

Inclusion Criteria:

• Failure after previous standard of care initial treatment of glioblastoma multiforme.

• Documentation by MRI of an interval increase in nodular gadolinium enhancement consistent with recurrent malignant glioma suitable for therapeutic re-resection.

• Previous pathological diagnosis of WHO Grade IV glioma.

• All previous treatment interventions are acceptable.

• Patients must have an ECOG (Eastern Cooperative Oncology Group) performance status of 0, 1, or 2 or a KPS (Karnofsky Performance Score) of at least 60.

• Patients must be 18 years of age or older.

• Patients must sign an approved informed consent.

• Hemodynamically stable, consistent with Standard of Care values for patients undergoing elective tumor resection.

Exclusion Criteria:

• Females who are pregnant, nursing, or not inclined to use adequate contraceptive methods if necessary to prevent pregnancy during the study.

• An active second primary malignancy with the exception of basal cell or squamous cell skin carcinoma.

• Major concomitant medical illness inclusive of severe chronic obstructive pulmonary disease, symptomatic coronary artery disease, heart failure, recent major cerebrovascular accident, brittle diabetes, renal dialysis, end stage liver disease, or labile hypertension.

• Patients who have a history of heparin-induced thrombocytopenia or hypersensitivity to heparin, enoxaparin, or pork products.

• Patients with an abnormal INR (International Normalized Ratio of greater than 1.3), if repeatable and refractory to correction by routine methods.

• Patients who have documented deep venous thrombosis