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Portola Pharmaceuticals to Announce Second Quarter 2015 Financial Results and Host Conference Call on Tuesday, August 4

SOUTH SAN FRANCISCO, Calif., July 28, 2015 (GLOBE NEWSWIRE) -- Portola Pharmaceuticals, Inc. (Nasdaq:PTLA) announced that it will host a webcast and conference call to discuss the Company's financial results for the quarter ended June 30, 2015, and provide a general business overview on Tuesday, August 4, 2015, at 4:30 p.m. Eastern Time (1:30 p.m. Pacific Time).

Conference Call Details

To access the live conference call, please dial (844) 452-6828 from the U.S. and Canada or +1 (765) 507-2588 internationally, and use the passcode 78895636. Please dial in 10 minutes prior to the start of the call.

To access the live and subsequently archived webcast of the conference call, go to the Investor Relations section of the company's website at http://investors.portola.com. Please connect to the website at least 15 minutes prior to the call to allow for any software download that may be necessary. A replay of the webcast will be available on the Company's website for 30 days following the live event.

About Portola Pharmaceuticals, Inc.

Portola Pharmaceuticals is a biopharmaceutical company developing product candidates that could significantly advance the fields of thrombosis and other hematologic diseases. The Company is advancing its three wholly-owned programs using novel biomarker and genetic approaches that may increase the likelihood of clinical, regulatory and commercial success of its potentially life-saving therapies. Portola's partnered programs are focused on developing selective Syk inhibitors for inflammatory conditions.

Betrixaban

Portola's wholly-owned, oral, once-daily Factor Xa inhibitor betrixaban is being evaluated in the only biomarker-based Phase 3 study for hospital-to-home prophylaxis of venous thromboembolism (VTE) in acute medically ill patients. Betrixaban's distinct properties may have the potential to allow the agent to demonstrate efficacy without the significant increase in the rate of major bleeding that was seen in this patient population with other Factor Xa inhibitors. If approved, betrixaban could be the first anticoagulant for both hospital and post-discharge VTE prophylaxis and the standard of care in this large market of more than 20 million patients in the G7 countries alone.

Andexanet Alfa

Andexanet alfa, an FDA-designated breakthrough therapy, is a recombinant protein designed to reverse the anticoagulant effect in patients treated with an oral or injectable Factor Xa inhibitor. Andexanet alfa has the potential to be a first-in-class antidote for anticoagulated patients who suffer a major bleeding episode or require emergency surgery. Portola has entered into Phase 3 clinical collaboration agreements with all of the manufacturers of direct Factor Xa inhibitors while retaining all commercial rights to andexanet alfa. The Company is currently evaluating andexanet alfa in the Phase 3 and Phase 4 ANNEXA™ (Andexanet Alfa a Novel Antidote to the Anticoagulant Effects of FXa Inhibitors) registration studies.

Cerdulatinib

Portola's product candidate in the area of hematologic cancer, cerdulatinib, is an orally available molecule that uniquely inhibits two validated tumor proliferation pathways – spleen tyrosine kinase (Syk) and janus kinase (JAK). It is currently being evaluated in a Phase 1/2a proof-of-concept study in patients with B cell leukemias or lymphomas with a focus on genetically-defined subtypes, as well as in patients who have failed therapy due to relapse or acquired mutations.

For more information, visit www.portola.com and follow the Company on Twitter @Portola_Pharma.

CONTACT: Investor Contact: Michele Mantynen Portola Pharmaceuticals ir@portola.com Media Contact: Julie Normart W2O Group jnormart@w2ogroup.com

Source:Portola Pharmaceuticals