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Oral Apremilast Achieves Statistical Significance For The Primary Endpoint Of ACR20 In The First Phase III Study (PALACE-1) In Patients With Psoriatic Arthritis

These results are from an investigational phase III study. Apremilast is not approved for the treatment of psoriatic arthritis.

About PALACE 1

PALACE-1 is one of three pivotal phase III multi-center, double-blind, placebo-controlled, parallel-group studies with 2 active-treatment groups. Approximately 500 subjects were randomized 1:1:1 to receive either apremilast 20 mg BID, 30 mg BID, or identically-appearing placebo for 24 weeks, with a subsequent extension in which all patients are treated with apremilast.

The primary endpoint of the study is the proportion of patients in each treatment group who achieved the American College of Rheumatology criteria for 20% improvement (ACR20) compared to baseline at week 16. Secondary endpoints include other measures of signs and symptoms, physical function and patient-reported outcomes.

About Apremilast

Apremilast, an oral small-molecule inhibitor of phosphodiesterase 4 (PDE4), works intracellularly to modulate a network of pro-inflammatory and anti-inflammatory mediators. PDE4 is a cyclic adenosine monophosphate (cAMP)-specific PDE and the dominant PDE in inflammatory cells. PDE4 inhibition elevates intracellular cAMP levels, which in turn down-regulates the inflammatory response by modulating the expression of TNF-α, IL-23, and other inflammatory cytokines. Elevation of cAMP also increases anti-inflammatory cytokines such as IL-10.

About Psoriatic Arthritis

Psoriatic arthritis is a painful, chronic inflammatory disease associated with the skin condition psoriasis. More than a million people in the U.S. and Europe are affected by this arthritic condition. Up to 30 percent of people with psoriasis eventually develop psoriatic arthritis, which involves joint inflammation and can lead to joint destruction. In addition to psoriatic skin lesions, common symptoms of psoriatic arthritis include pain, stiffness and swelling in several to many joints, as well as the spine. Patients often experience psoriasis on average for 10 years before the onset of joint symptoms, and many psoriatic arthritis patients go undiagnosed.

About Celgene International Sàrl

Celgene International Sàrl, located in Boudry, in the Canton of Neuchâtel, Switzerland, is a wholly owned subsidiary and international headquarters of Celgene Corporation. Celgene Corporation, headquartered in Summit, New Jersey, is an integrated global pharmaceutical company engaged primarily in the discovery, development and commercialization of innovative therapies for the treatment of cancer and inflammatory diseases through gene and protein regulation. For more information, please visit the Company's website at www.celgene.com.

Forward-Looking Statements

This press release contains forward-looking statements, which are generally statements that are not historical facts. Forward-looking statements can be identified by the words "expects," "anticipates," "believes," "intends," "estimates," "plans," "will," "outlook" and similar expressions. Forward-looking statements are based on management’s current plans, estimates, assumptions and projections, and speak only as of the date they are made. We undertake no obligation to update any forward-looking statement in light of new information or future events, except as otherwise required by law. Forward-looking statements involve inherent risks and uncertainties, most of which are difficult to predict and are generally beyond our control. Actual results or outcomes may differ materially from those implied by the forward-looking statements as a result of the impact of a number of factors, many of which are discussed in more detail in our Annual Report on Form 10-K and our other reports filed with the Securities and Exchange Commission.



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