09.10 Science, Technology and Practical Applications of Identifying, Classifying and Using Neoantigens with T Cell Therapy Laurence Cooper CEO , ZIOPHARM Oncology Synopsis We have demonstrated an approach to personalizing adoptive immunotherapy based on harnessing the T-cell receptor (TCR) repertoire that recognizes neoantigens and the enforced expression of harvested TCRs in autologous T cellsThe manipulation of T cells for human application is limiting, unless one has access to a nimble and cost-effective gene transfer technology. This is at hand, given the first-in-human application of the non-viral Sleeping Beauty (SB) transposon/transposase platformT cells can be modified by the electro-transfer of DNA plasmids from the SB system to express neoantigen-specific TCRs for human application. Thus, the therapeutic stage is setNeoantigens can be listed, reactive TCRs identified, and SB-modified T cells reprogrammed to redirect specificity through insertion of neoantigen-specific TCRsWe now have an approach to target metastatic epithelial cancers, the most common of human malignancies
Post by smallfarmer on Nov 15, 2016 6:11:24 GMT -6
BOSTON, Nov. 15, 2016 (GLOBE NEWSWIRE) -- ZIOPHARM Oncology, Inc. (Nasdaq:ZIOP), a biopharmaceutical company focused on new immunotherapies, today announced the publication of data demonstrating enhanced persistence of genetically modified T cells targeting leukemia through utilization of its non-viral Sleeping Beauty (SB) system to co-express membrane-bound IL-15 (mbIL15) and a CD19-specific chimeric antigen receptor (CAR). The article, titled Tethered IL-15 augments antitumor activity and promotes a stem-cell memory subset in tumor-specific T cells, was published in the Proceedings of the National Academy of Sciences (PNAS) and is available online here.
Using the SB system, researchers generated genetically modified T cells that preserved stem-cell memory (TSCM) by co-expressing the CAR with a fusion variant of IL-15. These engineered T cells were effective in treating established CD19+ leukemia in mice by facilitating the long-term persistence of TSCM cells sustained by signaling through mbIL15. These findings provide for a translational pipeline of immunotherapies with improved potential by combining mbIL15 and T cells with diverse specificities.
The ability to generate CAR-T cells with preserved stem-cell memory is a novel strategy for promoting long-lived persistence and effectiveness of immunotherapies for the treatment of patients with cancers. Producing this rare, but highly desirable, T-cell subset has historically been a challenge, said Laurence Cooper, M.D., Ph.D., Chief Executive Officer of ZIOPHARM and an author of the publication.
We have demonstrated the ability to incorporate membrane-bound IL-15 via the non-viral Sleeping Beauty platform, thereby enhancing T-cell survival and raising our expectations for corresponding therapeutic benefit. The fundamental role that IL-15 plays in T-cell activation and propagation makes it an attractive candidate to incorporate into engineered immunotherapies, and we are advancing CAR-modified T cells co-expressing mbIL15 to testing in humans, added Dr. Cooper.
The SB transposon-transposase is a unique non-viral system for introducing genes into cells and is exclusively licensed by Intrexon Corporation (NYSE:XON) through The University of Texas MD Anderson Cancer Center and accessed as part of ZIOPHARM's collaboration with Intrexon.
Post by smallfarmer on Nov 15, 2016 13:06:18 GMT -6
ZIOPHARM to Present at the Jefferies 2016 London Healthcare Conference
BOSTON, Nov. 10, 2016 (GLOBE NEWSWIRE) -- ZIOPHARM Oncology, Inc. (ZIOP) today announced that Laurence Cooper, M.D., Ph.D., Chief Executive Officer, will present at the Jefferies 2016 London Healthcare Conference on Thursday, November 17, 2016 at 4:40 p.m. GMT.
As previously announced, ZIOPHARM will host a conference call and webcast slide presentation Thursday, November 17, 2016, at 8:00 am ET to discuss information featured at the Society for Neuro-Oncology (SNO) Annual Meeting, including updated data from the Company’s Phase 1 study of Ad-RTS-hIL-12 + veledimex in high-grade glioma. The call can be accessed by dialing (844) 309-0618 (U.S. and Canada) or (661) 378-9465 (international). The passcode for the conference call is 11110235. To access the slides and live audio webcast, or the subsequent archived recording, visit the "Investors & Media" section of the ZIOPHARM website at www.ziopharm.com. A replay of the call will be available on the Company's website for two (2) weeks.
Post by smallfarmer on Nov 17, 2016 6:44:35 GMT -6
ZIOPHARM Announces Clinical Data on Ad-RTS-hIL-12 Demonstrates Survival Benefits in Patients with Recurrent Brain Cancer
— Data to Be Presented at the 21st Society for Neuro-Oncology Annual Meeting —
— Non-clinical Study Supports Initiation of New Clinical Trial of Ad-RTS-hIL-12 in Pediatric Brain Tumors —
— Company to Host Conference Call Today at 8:00a.m. ET —
BOSTON, Nov. 17, 2016 (GLOBE NEWSWIRE) -- ZIOPHARM Oncology, Inc. (Nasdaq:ZIOP), a biopharmaceutical company focused on new immunotherapies, today announced the presentation of both clinical and nonclinical data for Ad-RTS-hIL-12 + orally-administered veledimex for recurrent brain cancer at the 21st Annual Scientific Meeting of the Society for Neuro-Oncology (SNO) held November 17-20, 2016 in Scottsdale, Arizona. Ad-RTS-hIL-12 + veledimex is a novel viral gene therapy candidate utilizing the proprietary RheoSwitch Therapeutic System® (RTS®) technology for the controlled expression of interleukin 12 (IL-12), a critical protein for stimulating a vigorous immune response against cancers.
In a poster presentation titled "Phase 1 study of intra-tumoral viral delivery of Ad-RTS-hIL-12 + oral veledimex is well tolerated and suggests survival benefit in recurrent high-grade glioma," the Company will report interim results from patients with recurrent high-grade gliomas enrolled in three veledimex dosing cohorts (20mg, n=7; 30mg, n=6; and 40mg, n=6). Subjects with relapsed high-grade gliomas, either glioblastoma (GBM) or anaplastic astrocytoma (AA), undergoing re-resection were intra-tumorally injected once with Ad-RTS-hIL-12 along with oral doses of veledimex to activate and control production of IL-12.
As of October 14, 2016, the date of data collection for the SNO presentation, median overall survival (mOS) was 12.8 months, with 11 of 17 subjects alive. Survival rates at 6, 9, and 12 months for patients with multiple recurrences prior to administration of Ad-RTS-hIL-12 are described in the table:
Treatment N Relapsed Brain Tumor Medium #Recurrences mOS (months) Survival Rate (%) 6 months 9 months 12 months Ad + V (Overall) 17 16 GBM, 1 AA 3 12.8 87 65 54 Ad + V (20 mg) 7 6 GBM, 1 AA 3 12.8 100 86 71
GBM is an aggressive brain tumor affecting approximately 74,000 people worldwide each year.i,ii For patients who have experienced recurrences the prognosis is particularly poor, with a mOS of 6-7 months, while mOS in patients that have failed temozolomide and bevacizumab, or equivalent salvage chemotherapy, is approximately 3-5 months.iii, iv
In the study, IL-12 leading to the production of interferon-gamma in the bloodstream was measured and found to be proportional to the three doses of veledimex, demonstrating that this orally-delivered activator crossed the blood brain barrier to engage the RTS® gene switch and express IL-12 in a dose-dependent manner. Toxicities in all three dose cohorts were consistent with those previously reported, with a higher incidence of grade 3 or greater adverse events in the 40 mg dose group. Importantly, all related side effects were reversed upon cessation of veledimex. Based on the tolerability and survival benefit seen, the 20 mg dose of veledimex has been selected for an ongoing expansion cohort.
"These translational data confirm the activity of Ad-RTS-hIL-12 + veledimex in the clinic, demonstrating that veledimex crosses the blood brain barrier to activate the RheoSwitch® gene switch and produce IL-12, resulting in an immune response to the tumor and now, impressively, overall survival outcomes," said Francois Lebel, M.D., Executive Vice President, Research and Development, Chief Medical Officer at ZIOPHARM. "With median overall survival beyond 12 months in these patients who have experienced multiple recurrences, the therapeutic potential of Ad-RTS-hIL-12 + veledimex is very promising. We look forward to enrolling additional patients in the expanded 20 mg dose cohort and to discussing the results of the Phase I multi-center study with the FDA, with the goal of determining a registration pathway for this therapeutic in a disease with far too few treatment options."
The Company will also present results from a pre-clinical study of Ad-RTS-mIL-12 + veledimex as an investigational therapy for pediatric glioma in a poster titled "Local regulated IL-12 expression as an immunotherapy for the treatment of pontine glioma". Glioma in the pontine region of the brain accounts for approximately 15% of all cases of pediatric brain tumors, with a median survival time of less than one year. In an orthotopic pons model, veledimex was shown to cross the blood brain barrier to control mouse IL-12 production from the tumor, which stimulated the immune system and resulted in a profound increase in overall survival. Based on these results, the Company plans to initiate a Phase 1 clinical trial in pediatric brain tumors, including diffuse intrinsic pontine glioma (DIPG) in 2017.
"DIPG is an aggressive disease, and because of its location in the brain, it is virtually untreatable," added Laurence Cooper, M.D., Ph.D., Chief Executive Officer of ZIOPHARM. "Ad-RTS-hIL-12 + veledimex has unique potential in this indication especially given our ability to not only turn IL-12 on and off, but also to titrate IL-12 levels thanks to the RTS® technology. Our Ad-RTS-IL-12 + veledimex program continues to gain momentum, with the potential for a registration pathway in recurrent high-grade glioma in adults and expected study initiations as monotherapy in pediatric patients, as well as, in combination with checkpoint inhibitors in adult patients with brain cancer."
ZIOPHARM will host a conference call and webcast slide presentation today, Thursday, November 17, 2016, at 8:00 am ET to discuss updated data from the Company's Phase 1 study of Ad-RTS-hIL-12 + veledimex in high-grade glioma. The call can be accessed by dialing (844) 309-0618 (U.S. and Canada) or (661) 378-9465 (international). The passcode for the conference call is 11110235. To access the slides and live audio webcast, or the subsequent archived recording, visit the "Investors & Media" section of the ZIOPHARM website at www.ziopharm.com. The webcast will be recorded and available for replay on the Company's website for two (2) weeks.
About ZIOPHARM Oncology, Inc.:
ZIOPHARM Oncology is a Boston, Massachusetts-based biotechnology company employing novel gene expression, control and cell technologies to deliver safe, effective and scalable cell- and viral-based therapies for the treatment of cancer and graft-versus-host-disease. The Company's immuno-oncology programs, in collaboration with Intrexon Corporation (NYSE:XON) and the MD Anderson Cancer Center, include chimeric antigen receptor T cell (CAR-T) and other adoptive cell-based approaches that use non-viral gene transfer methods for broad scalability. The Company is advancing programs in multiple stages of development together with Intrexon Corporation's RheoSwitch Therapeutic System® technology, a switch to turn on and off, and precisely modulate, gene expression in order to improve therapeutic index. The Company's pipeline includes a number of cell-based therapeutics in both clinical and preclinical testing which are focused on hematologic and solid tumor malignancies.
Under: Been on the sidelines for a bit holding (building) cash. Now that "BIGLEY" has rolled out the tax plan its time to jump in.
Dec 21, 2017 19:06:02 GMT -6
martyc: Looks like you are buying Msft again!
Dec 15, 2017 11:23:29 GMT -6
martyc: The news that Trump called Rupert to congratulate him sure seems to indicate that this is heading to approval
Dec 15, 2017 11:22:23 GMT -6
Under: DIS finally getting some traction.?
Dec 14, 2017 17:08:45 GMT -6
martyc: I took an entry level position in DIS. Will add eventually to overweight when it becomes clearer that the deal will go thru. Can't believe how well positioned they will be. 60% Hulu. 20% of content watched on NFLX they can pull. More in thread
Dec 14, 2017 11:05:16 GMT -6
Under: Great posts on $DIS
Dec 13, 2017 17:50:49 GMT -6
Under: $ROKU Citron on a war path.
Nov 28, 2017 15:11:20 GMT -6
Under: $HAS takeover bid for $MAT?
Nov 10, 2017 16:16:07 GMT -6
martyc: Not looking like the market will provide any discounted opp for SGMO. Call was just too professional and all signs indicate they are on a great path for commercialization. Happy with core but wish I had some trading shs
Nov 10, 2017 9:04:05 GMT -6
martyc: For anyone looking to find an entry point into SGMO, I'm almost hoping is sells off in next few days so I can add more. They are really clicking but the fact they haven't signed new deals might cause some to exit. Watching as I have room for trading shs
Nov 9, 2017 18:28:09 GMT -6
martyc: Been an interesting ride so far. I figured the Bears would be about this good but hoped the O wouldn't look so lame. Another building yr but still possible to get to 8-8 IMO
Nov 9, 2017 18:26:08 GMT -6
Under: whats up with your Bears this year Marty?
Nov 9, 2017 17:35:25 GMT -6
martyc: Hope you were long ROKU. I wanted to see Q first so missed out
Nov 9, 2017 7:08:53 GMT -6