Advaxis (ADXS) Publishes Preclinical Research for HPV Treatment Candidate

MissionIR would like to highlight Advaxis (OTCBB:ADXS), a clinical-stage biotechnology company developing the next generation of immunotherapies for cancer and infectious diseases. Advaxis immunotherapies are based on a novel platform technology using live, attenuated bacteria that are bio-engineered to secrete an antigen/adjuvant fusion protein that is designed to redirect the powerful immune response all human beings have to the bacterium to the cancer itself.

In the company’s news,

Advaxis announced that it has published the preclinical research for ADXS-HPV, Advaxis’ Lm-LLO lead drug candidate. The product is designed for use in the treatment of HPV-associated cancers in combination with the PD-1 antibody.

The paper, titled “Anti-PD-1 antibody significantly increases therapeutic efficacy of Listeria monocytogenes (Lm)-LLO immunotherapy,” has been e-published in the Journal for Immunotherapy of Cancer. Dr. Samir N. Khleif and his research team conducted the research at the Georgia Regents University Cancer Center. Advaxis provided the Lm-LLO immunotherapies and partial research funding.

Among the studies’ various findings, it was demonstrated that treatment with an Lm-LLO immunotherapy, in combination with an anti-PD-1 antibody, significantly improved immune and therapeutic efficacy in preclinical mouse models.

The study also showed that a significant reduction of regulatory T cells and myeloid-derived suppressor cells in spleen and tumor microenvironments were mediated solely by the Lm-LLO immunotherapy. The addition of anti-PD-1 antibody to the Lm-LLO immunotherapy treatment resulted in an increase in antigen-specific immune responses in the periphery and in CD8 T cell infiltration into the tumor. As a result, this treatment combination led to inhibition of tumor growth and prolonged survival, while also completing regression of tumors, in treated animals.

Based on the findings in the mouse model, the team conducted additional studies to evaluate activity in human cells. Lm-LLO immunotherapy treatment was found to significantly upregulate surface PD-L1 expression on human monocyte-derived dendritic cells isolated. This finding suggests that the combination of Lm-LLO immunotherapy with an anti-PD-1 antibody could have clinical application.

“Previous studies with Lm-LLO immunotherapies have established the ability to combine with chemotherapy and radiation. Dr. Khleif’s data are first to show the potential of combining Advaxis constructs with promising immune modulator (PD-1) in active clinical development,” commented Dr. Petit, Chief Scientific Officer of Advaxis.  

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