G-202 Phase Ia MTD Clinical Trial Successfully Completed
Phase Ib Now Enrolling in Up To 18 Patients
Phase II Prostate Cancer Trial Planned for Q3
G-202 Unaffected by Changing Competitive Landscape
Download Full 24-Page Report with Important Disclosures: GNSZ Update 05-17-12
1.) G-202 Phase Ia MTD Trial Completed – Phase Ib Now Enrolling: On March 29th, GenSpera announced the completion of the Phase Ia dose-escalation trial of G-202 and has now commenced enrollment of the Phase Ib trial in up to 18 patients to further refine the dosing regimen and determine a recommended dose for Phase II clinical studies. Specifically, 28 patients were treated in the Phase Ia at doses ranging from 1.2 mg/m2/dose (~2 mg/dose) up to 88 mg/m2/dose (~150 mg/dose). The drug exposure in patients receiving the higher doses of G-202 falls within the range associated with anti-tumor efficacy in animal models. Although the study was not designed to determine the anti-tumor effects of the drug, signs of potential positive effects were observed. GenSpera also stated that they expect to initiate a Phase II study in castrate-resistant, chemotherapy-naïve prostate cancer patients within the next few months. Data from the Phase Ib trial, expected in early 2013, should give additional insight into the efficacy of G-202 in humans. (see G-202 Phase Ia & Ib Human Clinical Trials). GenSpera is also planning on commencing a Phase II trial of G-202 in castrate-resistant chemotherapy-naive prostate cancer patients in the U.S. with additional sites in the U.K. in Q3 2012.
2.) G-202 Still Needed Despite Recent Advances in Prostate Cancer: Although several drugs have recently been approved in prostate cancer such as JEVTANA®, ZYTIGA™ and PROVENGE® they have different mechanisms-of-action to GenSpera’s G-202. Eventually, all patients will become refractory to these anti-androgen and chemotherapies while PROVENGE cellular therapy only extended survival by approximately 4.5 months. The new drugs under development also use mechanisms of action that inhibit androgen production or binding to receptors on the cancer cell surfaces such as Medivation’s MDV3100 (an androgen receptor signaling inhibitor) demonstrating a survival benefit of 4.8 months without the use of steroid co-administration (as seen with drugs like ZYTIGA™). However, MDV3100′s anti-cancer effect is still dependent on interrupting androgen signaling. Eventually patients will become resistant to the treatment and the disease will progress. In contrast, G-202 kills independently of androgen pathways and in theory could represent a curative option for advanced prostate cancer patients. (see Competition)
3.) Unique Mechanism of Action (MOA): GenSpera’s drug candidates are based on chemical derivatives of a plant cytotoxin, called thapsigargin, which is a potent inhibitor of the intracellular sarcoplasmic/endoplasmic reticulum calcium ATPase (SERCA) pump. The inhibition of the transport protein causes intracellular Ca2+ (calcium) to rise significantly and trigger apoptosis (cell death). For example, G-202 is a prodrug where the active cytotoxin, 12ADT, is masked by a peptide complex until it binds to and is cleaved by the targeted Prostate-Specific Membrane Antigen (PSMA) thus triggering apoptosis. (see Thapsigargin and Prodrug Delivery of 12ADT). Investors should note a video of GenSpera’s platform technology can be seen at: http://www.genspera.com/investors_mainvideo.html
4.) Attractive Space for M&A: We note that Cougar Biotechnology, a former bulletin board company formed by a reverse-merger in 2006 was acquired by Johnson & Johnson (NYSE:JNJ) in 2009 for $970M in cash based on Phase II data for their prostate cancer drug (ZYTIGA™) which ultimately received FDA approval in April 2011. While partnerships and acquisitions are highly unpredictable, we believe GenSpera could eventually be an attractive candidate as early as Phase II completion should they show strong clinical results.
5.) Capital Raise Expected: Although GenSpera believes they have sufficient cash through March 2013, we expect the company to raise additional funds in preparation for their planned Phase II clinical trials in multiple indications and we have included our estimates in the financial model.
6.) Maintaining Rating of Strong Speculative Buy and $4.00 Target: GenSpera has been successfully progressing “under the radar” for some time now and we believe the company will soon begin attracting wider investor attention. GenSpera’s G-202 with its unique mechanism of action in prostate cancer and other tumor types along with the strong preclinical data and intellectual property provides an intriguing opportunity for savvy investors wanting to get ahead of the curve. Our Strong Speculative Buy rating and 12-18 month Price Target of $4.00 is based on a 35x multiple on projected 2017 earnings and discounted 55% to adjust for risk with a 10% acquisition premium for Phase II results.
Download Full 24-Page Report with Important Disclosures: GNSZ Update 05-17-12










