OncoSec Medical Reports Positive Preliminary Efficacy Results from Phase II Study of ImmunoPulse in Metastatic Melanoma Patients

95 Percent of All Treated Tumors Demonstrated Response to ImmunoPulse Therapy

SAN DIEGO – November 15, 2012 — OncoSec Medical Inc. (OTCBB: ONCS), a company developing its advanced-stage ImmunoPulse DNA-based immunotherapy and NeoPulse therapy to treat solid tumors, announces positive preliminary results from a Phase II trial investigating the use of ImmunoPulse in metastatic melanoma patients at the 6th World Meeting of Interdisciplinary Melanoma Skin Cancer Centres & 8th EADO Congress. This preliminary interim analysis of 13 out of 25 patients supports key findings from a Phase I trial suggesting that ImmunoPulse is able to induce regression or stabilization of distant untreated metastases following a single cycle of treatment.

A total of up to 25 patients with stage III or IV cutaneous and in-transit metastatic melanoma will be enrolled in this Phase II, single-arm, open-label and multi-center study. The trial was designed to assess local and distant objective response following treatment of cutaneous melanoma lesions with ImmunoPulse. As per the protocol, a preliminary interim analysis was scheduled upon completion of 50 percent enrollment in the study.

The purpose of the analysis was to confirm safety and efficacy observed in the Phase I study. At the time of this preliminary interim analysis, 13 patients were enrolled and treated. Thirteen subjects were evaluable at Day 39, nine at Day 90, and two at Day 180. Ninety-five percent of treated lesions demonstrated response at Day 39 (5 percent progressive disease, 14 percent stable disease (SD), 42 percent partial response (PR), 39 percent complete response (CR)). All treated lesions at Day 90 (5 percent SD, 50 percent PR, 45 percent CR), and at Day 180 (33 percent PR, 67 percent CR) demonstrated a response. At Day 180, two subjects were evaluable for the primary endpoint of objective overall response (ORR). One patient has a confirmed stable disease, and the second patient has a confirmed complete response of all treated and untreated lesions. Analysis of the safety data for the subjects analyzed confirms that intratumoral administration of DNA IL-12 with electroporation is safe and well-tolerated. No related adverse events reported were greater than grade 2, and were generally limited to transient pain related to electroporation treatment.

The preliminary results are being presented in a poster titled “Preliminary Analysis of a Phase II Trial of Intratumoral Delivery of Plasmid Interleukin-12  (pIL-12) with In Vivo Electroporation in Patients with Metastatic Melanoma.” Dr. Adil Daud, principal investigator and co-director of melanoma research at the University of California San Francisco School of Medicine, is co-author.

These data are also being orally presented at a parallel scientific symposium, hosted by OncoSec, titled “Electrogenetherapy: Intralesional Immunotherapy Approach for Skin Cancers Using Electroporation.” Drs. Adil Daud and Axel Hauschild will chair the event, which will be held on Thursday, November 15 from 6:00-7:00pm Barcelona time. The agenda is as follows:

– Application and Versatility of Electrogenetherapy – Dr. Richard Heller

– Clinical Experience: Case presentation and discussion of intralesional injection of

plasmid interleukin-12 with electroporation – Dr. Adil Daud

– Immune correlates and biomarkers: Immune related responses following intralesional injection of plasmid interleukin-12 with electroporation – Dr. David Weiner and Dr. Edward Cha

– Outlook on intralesional immunotherapies for the treatment of metastatic melanoma – Dr. Adil Daud

Punit Dhillon, President and CEO of OncoSec Medical, commented, “We are encouraged to have observed at least one complete response based on the evaluable patients that have met the primary endpoint timeline, and we will continue to follow this patient and the others to assess the durability of response. These data validate the results from the Phase I study and effort we have put into this program, while providing further evidence of the potential role of ImmunoPulse as a safe and effective option for treating this aggressive disease.”

Dr. Daud commented, “Preliminary results from this Phase II study appear to offer solid support to the earlier study indicating the efficacy of ImmunoPulse in treating metastatic melanoma. Enrollment in the study is ongoing and expected to be completed by the end of 2012. Long-term follow-up will assess durability of response.”

About the Phase II ImmunoPulse Study

A total of up to 25 patients with stage III or IV cutaneous and in-transit metastatic melanoma will be enrolled in this Phase II, single-arm, open-label and multi-center study. The trial is designed to assess local and distant objective response following treatment of cutaneous melanoma lesions with DNA IL-12 and electroporation with a primary endpoint of 24 weeks. One treatment cycle will consist of three treatments applied to up to four lesions on days 1, 5 and 8 with a maximum dose of 1.5 mg DNA IL-12 per treatment cycle. At 12 months, patients will be moved to the follow-up phase of the study and will be followed for up to five years for safety.

About Melanoma

Melanoma is the most serious form of skin cancer. If it is recognized and treated early, it is almost always curable, but if it is not, the cancer can advance and spread to other parts of the body, where it becomes hard to treat and can be fatal. While it is not the most common of the skin cancers, it causes the most deaths. The American Cancer Society estimates that at present, about 123,000 new cases of melanoma in the US are diagnosed in a year, resulting in approximately 10,000 deaths. Melanoma originates in melanocytes, the cells that produce the pigment melanin that colors our skin, hair, and eyes. The majority of melanomas are black or brown, but often they can also be skin-colored, pink, red, purple, blue or white. Currently, there remain few treatment options for patients with late-stage metastatic disease that can extend survival for the broad population.

 Data Presented at 6th World Meeting of Interdisciplinary Melanoma/Skin Care Centres & 8th EADO Congress 

90 Percent Complete Response Observed in Basal Cell Carcinoma 

SAN DIEGO – November 14, 2012 — OncoSec Medical Inc. (OTCBB: ONCS), a company developing its advanced-stage ImmunoPulse DNA-based immunotherapy and NeoPulse therapy to treat solid tumors, announced positive interim results from a Phase IV trial investigating the use of NeoPulse in skin cancer patients at the 6th World Meeting of Interdisciplinary Melanoma/Skin Care Centres & 8th EADO Congress. Data from the trial showed a complete response of greater than 90 percent in basal cell carcinoma patients and 70 percent in squamous cell carcinoma patients at six months.

The data was presented in a poster titled “Interim analysis of an open-labeled, single-arm multicenter study of electrochemotherapy in skin cancer” by lead author Paul Goldfarb, M.D., and coauthors Lennart Lofgren, M.D., Ph.D., Axel Hauschild, M.D. and Richard Heller, Ph.D.

Dr. Hauschild said, “Based on these interim results, NeoPulse appears to provide local control with the potential advantage of preserving normal tissue, and therefore warrants further exploration as an alternative or even adjuvant treatment in cutaneous skin cancers.” Dr. Hauschild is a dermato-oncologist and professor of dermatology at the University of Kiel, Germany, and faculty member of the 6th World Meeting of Interdisciplinary Melanoma/Skin Care Centres & 8th EADO Congress.

The primary goal of this phase IV cutaneous cancer study was to assess the ability of NeoPulse to control growth or recurrence of the cancer six months following treatment, equivalent to surgery as compared to historical controls, with respect to primary (new) tumors and locally recurrent tumors. The study was conducted at 15 clinical centers across Western Europe. A total of 88 patients were enrolled and received treatment. At the time of analysis, 69 of 88 (78.4 percent) patients were evaluable at the six-month follow-up. The complete response rate at six months among basal cell carcinomas was 92.8 percent and 70 percent among squamous cell carcinomas. Response rate of melanoma was not calculated since multiple tumors were treated with concomitant therapy. The treatment was well-tolerated. The most frequent treatment-related adverse events were pain, infection and insomnia; all were transient and manageable.

NeoPulse appears well-tolerated and able to achieve local control comparable to that of surgical resection. The potential advantage of the therapy lies with the preservation of normal tissue with improved cosmesis, avoiding the need for reconstruction in difficult-to-treat sites or those with significant innervation. Together with the possible reduction in cost associated with hospitalization for procedures involving extensive reconstruction, the approach warrants further exploration as an alternative in select cases of skin cancer.

Punit Dhillon, President and CEO of OncoSec Medical, said, “These data demonstrate how NeoPulse might serve as an alternative to surgery that selectively destroys cancer cells without harming normal, healthy tissue. The results of OncoSec’s skin cancer program have so far shown a positive outcome among the class of patients who would typically be subjected to disfiguring surgery. We believe that NeoPulse offers a potentially significant new treatment for a variety of skin cancers.”

About the Phase IV Study

This Phase IV study was designed as an open-labeled study to measure local control and pharmacoeconomic parameters for NeoPulse in primary or recurrent squamous cell carcinoma of the skin, basal cell carcinoma as well as recurrent metastatic melanoma. Patients with primary or recurrent histologically confirmed tumors with no evidence of brain mestastases were eligible for enrollment. Safety and local control were measured. Patients received local injection of bleomycin followed by electroporation. Concomitant therapy was permitted when warranted.

About NeoPulse 

Surgical resection of skin cancers can pose significant challenges in achieving local control while preserving normal tissue and function without the risk of cosmetic damage. NeoPulse involves the combined use of electroporation with intratumoral injection of low-dose bleomycin to treat local tumors. An evaluation of the pharmacoeconomic benefits of NeoPulse therapy suggests it could afford healthcare savings in reducing the expense and complications of reconstructive surgery to address cosmesis.

CE Certification Enables Commercialization of OncoSec Medical System (OMS) Electroporation Device in European Economic Area 

SAN DIEGO – October 17, 2012 – OncoSec Medical Inc. (OTCBB: ONCS), a company developing its advanced-stage ImmunoPulse DNA-based immunotherapy and NeoPulse drug-based chemotherapy to treat solid tumor cancers, announced it has received authorization to CE mark its proprietary gene and drug delivery platform, the OncoSec Medical System (OMS) electroporation device, for use in the European Economic Area (EEA). SGS Group, an industry-leading inspection, verification, testing and certification company, supervised the assessment and certification process.

A CE mark verifies the OMS electroporation device has met all applicable directives of the European Commission (EC) and subsequently the laws and regulations of the European Union (EU) member states and therefore can be commercialized within the 30-nation EEA and Switzerland. The electroporation device applies short electric impulses to a tumor, causing pores to open in the membrane of cancer cells, significantly increasing the uptake of anti-cancer agents into these cells. The granting of this CE mark involved a comprehensive audit of the company’s quality system as well as thorough evaluation and testing of the OMS electroporation device to assure it performs safely and as designed.  The CE mark affirms OncoSec’s commitment to product quality and development, and augments the notified body certification to the International Organization for Standardization’s (ISO) 13485 standard for the “design, development, manufacture, and distribution of electroporation devices,” which the company received in July.

Punit Dhillon, President and CEO of OncoSec, commented,

“The approval marks an essential regulatory milestone on the road to commercialization and further approval of the OncoSec Medical System. The CE mark shows that OncoSec has the capability to manufacture and develop a device that meets commercial regulatory requirements.”

 


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