Phio Pharmaceuticals Announces Publication in Frontiers in Immunology

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Journal is the official publication of the International Union of Immunological Societies

Marlborough, Massachusetts--(Newsfile Corp. - December 12, 2024) - Phio Pharmaceuticals Corp. (NASDAQ: PHIO) is a clinical-stage biotechnology company developing therapeutics that use its INTASYL® siRNA gene silencing technology designed to make the body's immune cells more effective in killing cancer cells announced today its manuscript, Self-delivering RNAi Immunotherapeutic PH-762 Silences PD-1 to Generate Local and Abscopal Anti-tumor Efficacy, has been published in the December, 2024 issue of Frontiers in Immunology.

The article presents preclinical proof-of-concept data for PH-762, an INTASYL compound designed to silence PD-1, is currently in clinical development for advanced cutaneous malignancies. Phio recently presented data from its second cohort in its on-going Phase 1b clinical trial showing one patient with cutaneous squamous cell carcinoma in the 2nd cohort achieved a complete response (100% tumor clearance) while a second patient with squamous cell carcinoma achieved a partial response (90% tumor clearance).

Frontiers in Immunology is dedicated to propelling advancements in the field of Immunology. The Editor-in-Chief is Luigi Daniele Notarangelo, Director of the Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIH), and Senior Researcher at Boston Children's Hospital, Harvard Medical School.

"We are delighted to see this publication which presents a comprehensive summary of INTASYL's uniqueness addressing its selective gene targeting, potent silencing, and is a promising candidate for treatment of solid tumors," said Robert Bitterman, CEO, Phio Pharmaceuticals.

About Phio Pharmaceuticals Corp.

Phio Pharmaceuticals Corp. (NASDAQ: PHIO) is a clinical-stage biotechnology company advancing its proprietary INTASYL siRNA gene silencing technology to eliminate cancer. INTASYL can target and silence virtually any gene with high degree of specificity across a wide range of cell types and tissues. INTASYL is designed to enhance the ability of immune cells to more effectively kill tumor cells. INTASYL has also demonstrated enhancement adoptive cell therapy. Notably, INTASYL is a self-delivering RNAi technology focused on immuno-oncology therapeutics without the need for formulation enhancements or manipulations to reach its target.

Phio's lead clinical program, PH-762, is an INTASYL compound that silences PD-1. PH-762 is a potential non-surgical treatment for skin cancers. The on-going Phase 1b trial (NCT# 06014086) received FDA clearance for an Investigational New Drug Application to evaluate PH-762 in the treatment of cutaneous SCC, melanoma and Merkel cell carcinoma in second quarter of 2023.