PGRN/GP88 is an 88 kilodalton glycoprotein produced by cells of epithelial or mesenchymal origin. It is an autocrine growth factor, which is overexpressed in several human cancers including breast and ovarian cancer, multiple myeloma, prostate cancer, non small cell as well as other tumors. High GP88 expression is associated with the malignant phenotype, increased proliferation and survival associated with drug resistance to some currently used therapeutic agents. Pathological studies have shown that PGRN/GP88 is an independent prognostic factor in several cancers including breast, non-small cell lung carcinoma, prostate and digestive cancers. High GP88 expression in tumor tissues is associated with decreased disease-free survival and increased mortality. In addition, in stage 4 breast cancer patients, high circulating level of PGRN/GP88 is associated with decreased overall survival.
This study will enroll patients with relapsed/refractory solid tumor malignancies (1A) who failed one or more standard chemotherapy or targeted therapy regimens per SOC guidelines such as NCCN guidelines and for whom no standard therapy exists. In 1B portion of the study patients with triple negative breast cancer, hormone resistant breast cancer, non small cell lung cancer and mesothelioma will be accrued. The treatment period (cycle) will consist of 28-day cycles, the AGO1 will be infused every 14 days. The dosing schedule/frequency of treatments for subjects in the dose escalation portion (1A) will be the same as for subjects in the expansion portion (1B).
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