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Pharmacyclics® Announces Updated Results For BTK Inhibitor Ibrutinib (PCI-32765) At American Society Of Hematology (ASH) Annual Meeting

ASH Annual Meeting Oral Presentation The Bruton's Tyrosine Inhibitor Ibrutinib (PCI-32765) is Active and Tolerated in Relapsed Follicular Lymphoma Nathan Fowler, M.D. Dept of Lymphoma, UT MD Anderson Cancer Center, Houston, TX Long term results on 16 relapsed / refractory evaluable follicular patients dosed with ibrutinib as monotherapy from the Phase I dose escalation study (PCYC-04573) were presented. Patients were heavily pretreated with a median of 3 prior therapies, and 44% had high risk Follicular Lymphoma International Prognostic Index scores. The ORR in 16 subjects was 44% with 3 CRs and 4 PRs. For those patients with at least 1 tumor response assessment, the media PFS in dose cohorts greater or equal 2.5 mg/kg (n=11) was reported at 13.4 months with an ORR=55%. With patients treated at greater or equal 5 mg/kg (n=9) the median PFS was reported as 19.6 months with an ORR=56%. The drug was well tolerated with no apparent cumulative toxicity upon extended dosing in this study.  

ASH Annual Meeting Poster Presentation Multiple Myeloma (MM) Early Changes in Cytokines, Chemokines and Indices of Bone Metabolism in a Phase 2 Study of the Bruton Tyrosine Kinase (Btk) Inhibitor, Ibrutinib (PCI-32765) in Patients with Relapsed or Relapsed/Refractory MM Ravi Vij, M.D., Washington University, School of Medicine, Saint Louis, MO This poster presented clinical results and biomarker studies on 13 MM patients accrued in the first cohort where ibrutinib monotherapy was dosed at 420mg. Patients were heavily pretreated, with a median of 4 prior therapies (range 2 to 10). All patients previously had prior exposure to bortezomib, lenalidomide, and dexamethasone or prednisone and 92% had progressed following stem cell transplant. A total of 39% of the patients had del17p.  Signals of biologic and clinical activity were observed. Reductions in paraprotein of at least 50% were observed in 3 patients on ibrutinib monotherapy, and one patient went on to have a confirmed PR following addition of dexamethasone.  As anticipated from pre-clinical studies, decreases of several biomarkers of bone metabolism, angiogenesis and chemotaxis were observed following the start of treatment. The most common treatment related adverse events were Grade 1/2 nausea and diarrhea. We have expanded the study to explore ibrutinib administration at 840 mg and a 560 mg dose in combination with dexamethasone. As we obtain further data from these cohorts over the next 12 months, we will assess the clinical outcome of ibrutinib in this patient population. 

Conference Call and Webcast DetailsPharmacyclics will be holding a conference call on Wednesday, December 12, 2012 at 8:30 AM ET. To participate in the conference call, please dial1-877-407-0778 for domestic callers and 1-201-689-8565 for international callers. To access the live audio broadcast or the subsequent archived recording, log on to http://ir.pharmacyclics.com/events.cfm. The archived version of the webcast will be available for 30 days on the Investor Relations section of the company's website at www.pharmacyclics.com.

About Pharmacyclics and Janssen CollaborationAs previously announced on December 8, 2011, Pharmacyclics entered into a worldwide collaboration with Janssen to develop and commercialize ibrutinib. To date, $150 million in upfront and $150 million in milestones have been earned. Pharmacyclics may receive up to an additional $675 million in development and regulatory milestone payments; for total upfront and potential milestone payments of $975 million.  Following regulatory approval, Pharmacyclics will book US sales and take the lead role in US commercial strategy development. Both Pharmacyclics and Janssen will share in commercialization activities. Outside the United States, Janssen will book sales and lead and perform commercialization activities. Profits and losses from the commercialization activities will be split 50/50 on a worldwide basis. Development and commercialization activities under the collaboration will be managed through a shared governance structure. Each company will lead development for specific indications as stipulated in a global development plan, with development costs shared on a 40/60 basis (Pharmacyclics 40% and Janssen 60%).

About PharmacyclicsPharmacyclics® is a clinical-stage biopharmaceutical company focused on developing and commercializing innovative small-molecule drugs for the treatment of cancer and immune mediated diseases. Our mission and goal is to build a viable biopharmaceutical company that designs, develops and commercializes novel therapies intended to improve quality of life, increase duration of life and resolve serious unmet medial healthcare needs; and to identify promising product candidates based on scientific development and administrational expertise, develop our products in a rapid, cost-efficient manner and pursue commercialization and/or development partners when and where appropriate.

Presently, Pharmacyclics has three product candidates in clinical development and several research molecules in lead optimization. We are committed to high standards of ethics, scientific rigor, and operational efficiency as we move each of these programs to viable commercialization.

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