On April 20, 2020 Precigen, Inc. (Nasdaq: PGEN), a biopharmaceutical company specializing in the development of innovative gene and cell therapies to improve the lives of patients, reported that the US Food and Drug Administration (FDA) has cleared the Investigational New Drug (IND) application to initiate a Phase I/II trial for Precigen’s PRGN-2009, a first-in-class, off-the-shelf (OTS) investigational immunotherapy utilizing the AdenoVerse platform designed to activate the immune system to recognize and target HPV+ solid tumors(Press release, Precigen, APR 20, 2020, View Source [SID1234556432]). HPV+ cancers represent a significant health burden in indications such as head and neck, cervical, vaginal and anal cancer.
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The Phase I portion of the study will follow 3+3 dose escalation to evaluate the safety of PRGN-2009 administered as a monotherapy and to determine the recommended Phase II dose (R2PD) followed by an evaluation of the safety of the combination of PRGN-2009 at the R2PD and an investigational bifunctional fusion protein in patients with recurrent or metastatic HPV-associated cancers. The Phase II portion of the study will evaluate PRGN-2009 as a monotherapy or in combination with the bifunctional fusion protein in patients with newly-diagnosed stage II/III HPV16-positive oropharyngeal cancer.
PRGN-2009 leverages Precigen’s UltraVector and AdenoVerse platforms to optimize HPV antigen design in combination with its gorilla adenovector with a large payload capacity and the ability for repeat administration due to very low to non-existent seroprevalence in the human population.
PRGN-2009 is under development through a Cooperative Research and Development Agreement, or CRADA, within the laboratory of Dr. Jeffrey Schlom, Chief of the Laboratory of Tumor Immunology and Biology (LTIB), Center for Cancer Research (CCR), National Cancer Institute (NCI). This CRADA has allowed Precigen to rapidly and cost-effectively advance PRGN-2009 to the clinic. The Phase I/II clinical trial of PRGN-2009 will be conducted at the NIH Clinical Center and will be led by Dr. Julius Strauss, Co-Director of the LTIB’s Clinical Trials Group, and Dr. James Gulley, Chief of the Genitourinary Malignancies Branch, CCR, NCI.
"Globally, high-risk HPVs cause nearly 5% of all cancers, with about 570,000 women and 60,000 men diagnosed with HPV-related cancers each year," said Helen Sabzevari, PhD, President and CEO of Precigen. "We are incredibly proud of our continued relationship with NCI and the tremendous progress in bringing forward this novel asset class in such a short period of time. Advancements are critically needed to better target HPV+ tumors across multiple patient groups, and we have been encouraged by the promising preclinical data for PRGN-2009 in potentially targeting this patient population."
About HPV+ Cancers
HPV infects the squamous cells that line the inner surfaces of certain organs and, consequently, most HPV-related cancers are a type of cancer called squamous cell carcinoma. Some cervical cancers come from HPV infection of gland cells in the cervix and are referred to as adenocarcinomas.1 HPV-related cancers include cervical, oropharyngeal, anal, penile, vaginal, and vulvar.1 Nearly 44,000 HPV-associated cancers occur in the United States each year. Of these, approximately 25,000 occur in women and 19,000 occur in men.2 HPV is considered responsible for more than 90% of anal and cervical cancers, about 70% of vaginal and vulvar cancers, and more than 60% of penile cancers.2 Recent studies indicate that about 70% of cancers of the oropharynx also may be related to HPV.2