Avid Bioservices Inc (CDMO)

[cjgaddy]

The 4-4-17 AACR’17 PPHM+ImmunoVaccine DepoVax+Bavi poster #3657. Also, Peregrine Exhibiting, booth #3312.

4. 4-4-17/8am #3657 - Session: BITES BISPECIFICS & CHECKPOINTS
”Phosphatidylserine-Targeting Antibodies Enhance Anti-Tumor Activity of a Tumor Vaccine in a HPV-Induced Tumor Model”
=> Genevieve Weir 1, Tara Quinton 1, Jeff T. Hutchins 2, Bruce D. Freimark 2, Marianne Stanford (VP/Res., Immunovaccine)
1=Immunovaccine, Inc., Halifax, NS, Canada [ https://www.imvaccine.com ]
2=Peregrine Pharmaceuticals
[Note: clearly, this study is combining PPHM’s Anti-PS with ImmunoVaccine’s DepoVax Vaccine Adjuvanting Platform https://www.imvaccine.com/depovax.php ]
ABSTRACT:
Antibodies targeting phosphatidylserine (PS) have been shown to induce anti-tumor responses by induction of tumor-specific T cells. Based on this observation, we evaluated the responses of PS and PD-1 targeting antibody therapy to enhance anti-tumor responses of a HPV16 peptide vaccine formulated in DepoVax (DPX) in mice bearing HPV-transformed C3 mouse tumors. The addition of PS-targeting antibody (mch1N11) [“Mouse version of Bavituximab”] to DPX/metronomic cyclophosphamide (mCPA) immunotherapy prolonged survival in comparison to mice receiving an isotype control in combination with DPX/mCPA. When anti-PD-1 was added to mch1N11 + mCPA, there was no increase in survival. The addition of mch1N11 to DPX/mCPA immunotherapy had no effect on tumor growth or survival in the aggressive B16-F10 model. TIL analysis revealed an increase in CD8+ T cells, antigen specific CD8+ T cells and PD-1+ T cells in the tumor with mch1N11 treatment. The expression of surface markers for macrophages (CD68high, F4/80) and dendritic cells (CD11c) were also increased in the tumors of mice treated with mch1N11. RT-qPCR analysis of the tumor confirmed higher mRNA expression of T cells markers (CD8, Granzyme B, PD-1) and antigen presenting cell markers (F4/80, CD74). In the spleen, expression of cell surface markers for monocytes (CD11b) and PD-1+ T cells (CD8) were elevated in groups treated with mch1N11 in combination with anti-PD-1. Combined, these findings indicate that in this model, PS-targeting antibodies can enhance the activity of phagocytic cells involved in antigen presentation. We have found that PD-1 expression increases as anti-tumor activity increases, therefore these results also provide an indication that antibodies targeting PS enhance the anti-tumor immune response induced by DPX/mCPA therapy. The observations suggest that PS-targeting antibodies may enhance therapeutic vaccines for the treatment of cancer.
-------
3-24-17 Immunovaccine PR: “Immunovaccine to Present New Preclin. Combo Therapy Data at AACR’17” …Immunovaccine conducted this research in collaboration with Peregrine Pharm. with the goal of analyzing the potential enhanced anti-cancer activity of combining DepoVax-based cancer immunotherapies with Peregrine's lead clinical product candidate bavituximab… Immunovaccine Dir./Res. Genevieve Weir will present data analyzing the potential for enhanced anti-tumor responses of PS & PD-1 targeting antibody therapies when combined with an HPV16 peptide vaccine formulated in Immunovaccine's proprietary DepoVax technology. "Our work with Peregrine, and the research it has produced, fits squarely into our corporate objective of exploring clinical stage immunotherapies that may have synergistic effects when combined with our lead candidate, DPX-Survivac," said Marianne Stanford (PhD) VP/Res. for Immunovaccine. "We look forward to discussing the results of this study, and its potential implications, with our colleagues in the scientific community at this year's AACR meeting." https://www.imvaccine.com/releases.php?releases_id=418

------------------------
POSSIBLE GENESIS OF IMMUNOVACCINE COLLAB???
11-9-15 SITC'15: New Bavi+Checkpoint Inhibitors preclin. data (UTSW/DUKE's Herbert K. Lyerly) http://tinyurl.com/pbof95w
...Also, collab. with Dr. Bernard Fox (Immunotherapist/Earle A. Chiles Res.Inst.) on new Immuno-Profiling Clinical Test (Opal 6-plex quantitative IF Assay), PPHM roundtable with Raymond Birge (Rutgers), Douglas Graham (Emory), Dmitry Gabrilovich (Wistar), Rolf Brekken (UTSW), Maria Karasarides (AstraZeneca) - ”Combining Bavi w/anti-PD-1 significantly enhanced O/S… significant incr. CD45+, CD8+ and CD3+ T-cells… led a prolonged anti-tumor immune response which protected the animals against a re-challenge w/same tumor.”

==========================
Apr1-5: AACR 2017, WashDC http://tinyurl.com/mxz23gz - SUMMARY of PPHM’s 5 AACR’17 ABSTRACTS: [See DETAILS below]
1. MSKCC+PPHM: 4-2-17/1pm #574, “PSTargeting+RAD+AntiPD1 Promotes Anti-Tumor Activity, Melanoma” (same as SITC'16/11-14-16 http://tinyurl.com/js3fca4 )
2. MSKCC+PPHM: 4-3-17/8am #1651, “PSTargeting+Adoptive TCell Transfer (ACT) Eliminates Adv. Tumors w/o Off-Target Toxicities, Melanoma” <=NEW(2nd) Joint MemSloan/PPHM study, see: http://tinyurl.com/h3ylrku
3. PPHM: 4-4-17/8am #3652, “PSTargeting+LAG3+AntiPD1 Significantly Enhances Anti-Tumor Activity, Triple- MBC”
4. IMMUNOVACCINE+PPHM: 4-4-17/8am #3657, ”PSTargeting Enhances Anti-Tumor Activity of a Tumor Vaccine(DepoVax), HPV-Induced Tumor” https://www.imvaccine.com See 3-24-17: https://www.imvaccine.com/releases.php?releases_id=418
5. PPHM+VANDERBILT+PRECISIONMEDICINE+PROVIDENCECC: 4-3-17/1pm #CT159/25 (Session: Ph2/3 Clinical Trials in Progress), “IFN-y Analysis In Blood & Tissue as a Potential Prognostic and/or Predictive Biomarker” (abstract embargoed, Sunrise Biomarker #3) - See below.
ALSO: Peregrine Exhibiting – booth #3312.