Pharmacyclics Release: Solid Tumor Study Investigating Ibrutinib (IMBRUVICA) In Combination With Anti-PD-L1 Antibody (MEDI4736) Commences In Patients With Relapsed/Refractory Non-Small Cell Lung, Breast And Pancreatic Cancers

SUNNYVALE, Calif., April 1, 2015 /PRNewswire/ -- Pharmacyclics, Inc. (NASDAQ: PCYC) today announced the initiation of PCYC-1135-CA, a multi-center study that will investigate the use of ibrutinib (IMBRUVICA^®) in combination with MEDI4736, an investigational, anti-PD-L1 immune checkpoint inhibitor being developed by AstraZeneca. The Phase Ib/II study will examine the safety, tolerability and effectiveness of this investigational combination in individuals with relapsed or refractory (R/R) non-small cell lung cancer (NSCLC), breast cancer, and pancreatic cancer. IMBRUVICA is jointly developed and commercialized by Pharmacyclics and Janssen Biotech, Inc.

"Based on the results of pre-clinical studies, we are extremely excited to investigate the potential safety and effectiveness of ibrutinib in combination with MEDI4736 in a subset of individuals who no longer are benefitting from other therapies and whose disease continues to progress," said Darrin Beaupre, M.D., Ph.D., Head of Early Development and Immunotherapy at Pharmacyclics. "We believe that combination strategies with exciting therapies such as ibrutinib and immunotherapy agents will be important toward driving future advancements in difficult-to-treat cancers."

The Phase Ib portion of the study will primarily seek to determine the safety, tolerability, and appropriate dose of ibrutinib when combined with MEDI4736 to treat individuals with these cancers. The Phase II portion of the study will be conducted in three distinct cohorts to determine the safety and effectiveness of the treatment combination in individuals with R/R NSCLC, breast and pancreatic cancers.

The clinical study will aim to enroll approximately 160 subjects at approximately 20 sites in the U.S. To learn more about the clinical study, visit: www.clinicaltrials.gov or call Pharmacyclics Medical Information at 877-877-3536.

About IMBRUVICA
IMBRUVICA (ibrutinib) is a first-in-class, oral, once-daily therapy that inhibits a protein called Bruton's tyrosine kinase (BTK).¹ BTK is a key signaling molecule in the B-cell receptor signaling complex that plays an important role in the survival and spread of malignant B cells.^1,2 IMBRUVICA blocks signals that tell malignant B cells to multiply and spread uncontrollably.¹

IMBRUVICA is approved for the treatment of patients with chronic lymphocytic leukemia (CLL) who have received at least one prior therapy, CLL patients with del 17p, a genetic mutation that occurs when part of chromosome 17 has been lost, and patients with Waldenstrom's macroglobulinemia.¹

IMBRUVICA is also approved for the treatment of patients with mantle cell lymphoma (MCL) who have received at least one prior therapy. Accelerated approval was granted for the MCL indication based on overall response rate (ORR). Continued approval for the MCL indication may be contingent upon verification of clinical benefit in confirmatory trials.¹

IMBRUVICA is being studied alone and in combination with other treatments in several blood cancers. Over 5,100 patients have been treated in clinical trials of IMBRUVICA conducted in 35 countries by more than 800 investigators. Currently, 13 Phase III trials have been initiated with IMBRUVICA and 58 trials are registered on www.clinicaltrials.gov.

IMBRUVICA was one of the first medicines to receive U.S. FDA approval via the new Breakthrough Therapy Designation pathway, and is the only product to have received three Breakthrough Therapy Designations.

To learn more about the medical terminology used in this news release, please visit http://stedmansonline.com/.

IMPORTANT SAFETY INFORMATION

Warnings and precautions include hemorrhage, infections, cytopenias, atrial fibrillation, second primary malignancies, Tumor Lysis Syndrome and embryo-fetal toxicity.

The most common adverse reactions (>25%) in patients with B-cell malignancies (MCL, CLL, WM) were thrombocytopenia, neutropenia, diarrhea, anemia, fatigue, musculoskeletal pain, bruising, nausea, upper respiratory tract infection, and rash. For additional important safety information, please see Important Safety Information to the right and the full Prescribing Information at www.imbruvica.com/downloads/Prescribing_Information.pdf.

About Pharmacyclics
Pharmacyclics, Inc. (NASDAQ: PCYC) is a biopharmaceutical company focused on developing and commercializing innovative small-molecule drugs for the treatment of cancer and immune mediated diseases. The company's mission 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 medical needs. It will do so by identifying and controlling promising product candidates based on scientific development and administrative expertise, developing its products in a rapid, cost-efficient manner and, pursuing commercialization and/or development partners when and where appropriate.

Pharmacyclics markets IMBRUVICA and has three product candidates in clinical development and several preclinical molecules in lead optimization. The company is committed to high standards of ethics, scientific rigor and operational efficiency as it moves each of these programs to commercialization. Pharmacyclics is headquartered in Sunnyvale, CA. To learn more, please visit www.pharmacyclics.com.

NOTE: This announcement may contain forward-looking statements made in reliance upon the safe harbor provisions of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements, among others, relating to our future capital requirements, including our expected liquidity position and timing of the receipt of certain milestone payments, and the sufficiency of our current assets to meet these requirements, our future results of operations, our expectations for and timing of ongoing or future clinical trials and regulatory approvals for any of our product candidates, and our plans, objectives, expectations and intentions. Because these statements apply to future events, they are subject to risks and uncertainties. When used in this announcement, the words "anticipate", "believe", "estimate", "expect", "expectation", "goal", "should", "would", "project", "plan", "predict", "intend", "target" and similar expressions are intended to identify such forward-looking statements. These forward-looking statements are based on information currently available to us and are subject to a number of risks, uncertainties and other factors that could cause our actual results, performance, expected liquidity or achievements to differ materially from those projected in, or implied by, these forward-looking statements. Factors that may cause such a difference include, without limitation, our need for substantial additional financing and the availability and terms of any such financing, the safety and/or efficacy results of clinical trials of our product candidates, our failure to obtain regulatory approvals or comply with ongoing governmental regulation, our ability to commercialize, manufacture and achieve market acceptance of any of our product candidates, for which we rely heavily on collaboration with third parties, and our ability to protect and enforce our intellectual property rights and to operate without infringing upon the proprietary rights of third parties. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, performance or achievements and no assurance can be given that the actual results will be consistent with these forward-looking statements. For more information about the risks and uncertainties that may affect our results, please see the Risk Factors section of our filings with the Securities and Exchange Commission, including our Form 10-K for the year ended December 31, 2013 and quarterly reports on Form 10-Q. We do not intend to update any of the forward-looking statements after the date of this announcement to conform these statements to actual results, to changes in management's expectations or otherwise, except as may be required by law.

IMBRUVICA is a registered trademark of Pharmacyclics, Inc.

¹ IMBRUVICA Prescribing Information, January 2015
² Genetics Home Reference. Isolated growth hormone deficiency. Available at: http://ghr.nlm.nih.gov/condition/isolated-growth-hormone-deficiency. Accessed March 2015.

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