On January 24, 2022 NeoImmuneTech, Inc. (KOSDAQ: 950220), a clinical-stage T cell-focused biopharmaceutical company, reported the publication of preclinical data evaluating the company’s lead asset NT-I7 (efineptakin alfa), a novel T cell amplifier, in mouse models of glioblastoma (GBM) (Press release, NeoImmuneTech, JAN 24, 2022, View Source [SID1234606742]). The data come from a publication titled "Long-acting recombinant human interleukin-7, NT-I7, increases cytotoxic CD8 T cells and enhances survival in mouse glioma models," in the Clinical Cancer Research journal. The paper was published in collaboration with lead author Dr. Jian Li Campian, M.D., Ph.D., of the Mayo Clinic and Principal Investigator of this study, along with additional authors from NeoImmuneTech. These data show that NT-I7, in combination with radiation therapy, significantly prolonged survival in two glioma models dependent on the NT-I7-driven increase of CD8 T cells.
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This study utilized a murine model of glioblastoma, in which one dose of NT-I7 significantly boosted lymphocyte levels in the blood, lymphoid organs and tumor and enhanced the anti-tumor response in animal. When NT-I7 was combined with radiation therapy, this translated to a significant improvement in mouse survival; the addition of temozolomide (TMZ) offered no additional survival improvement.
"The standard of care for glioblastoma patients is radiation and TMZ, a treatment regimen which causes severe prolonged lymphopenia that is associated with lower patient survival," said Dr. Campian. "NT-I7 demonstrated the ability to correct this treatment-related lymphopenia in our study, and this potential is extremely promising in the pursuit to improve outcomes for patients with glioblastoma."
In addition, data showed that NT-I7 promoted an inflamed tumor microenvironment by significantly increasing the CD8 to Treg ratio, and enhanced the anti-tumor response by increasing the infiltration of IFNγ-expressing T cells in the tumor. While chemoradiation caused a notable decrease in the number of CD4 and CD8 T cells in the lymph nodes, the addition of NT-I7 not only restored these numbers but in some cases surpassed the levels seen in untreated controls.
NT-I7 is currently under evaluation for the treatment of glioblastoma in an ongoing Phase 1/2 trial (NCT03687957).
About NT-I7
NT-I7 (efineptakin alfa) is the only clinical-stage long-acting human IL-7, and is being developed for oncologic and immunologic indications, in which T cell amplification and enhanced functionality may provide clinical benefit. IL-7 is a fundamental cytokine for naïve and memory T cell development and for sustaining immune response to chronic antigens (as in cancer) or foreign antigens (as in infectious diseases). In clinical trials to date, NT-I7 has exhibited favorable PK/PD and safety profiles, both as a monotherapy and in combination with other anticancer treatments. NT-I7 is being studied in multiple clinical trials in solid tumors and as a vaccine adjuvant. Studies are being planned for testing in hematologic malignancies, additional solid tumors and other immunology-focused indications.