Pfizer Announces Positive Top-Line Results From Two Phase 3 Trials Of Tofacitinib In Plaque Psoriasis

Tuesday, April 22, 2014 - 8:00am EDT -- Pfizer Inc. (NYSE:PFE) announced today top-line results from two pivotal Phase 3 trials from the Oral treatment Psoriasis Trials (OPT) Program, OPT Pivotal #1 (A3921078) and OPT Pivotal #2 (A3921079), evaluating the efficacy and safety of tofacitinib, an oral Janus kinase (JAK) inhibitor, the first in a new class of medicines being investigated for the treatment of moderate-to-severe plaque psoriasis. The OPT Pivotal #1 and OPT Pivotal #2 studies showed that tofacitinib, as a 5 mg or a 10 mg dose taken as a pill twice-daily, met the primary efficacy endpoints of statistically significant superiority over placebo at Week 16 in the proportion of subjects achieving a Physician’s Global Assessment response of “clear” or “almost clear,” and the proportion of subjects achieving at least a 75% reduction in Psoriasis Area and Severity Index, two commonly used measures of efficacy in psoriasis.

No new safety signals for tofacitinib were observed in the OPT Pivotal #1 or OPT Pivotal #2 studies. Detailed analyses of these studies, including additional efficacy and safety data, will be submitted for presentation at a future scientific meeting.

“Psoriasis is a long-term disease with no cure that can have a significant impact on patients. Although it is one of the most common chronic inflammatory diseases, many psoriasis patients remain untreated, undertreated or dissatisfied with their treatment, according to recently published surveys,” said Dr. Steven Romano, Global Medicines Development Lead for the Pfizer Global Innovative Pharmaceutical business. “Tofacitinib is the first in a new class of investigational psoriasis treatments, and I am encouraged by our Phase 3 results to-date that demonstrate the potential of tofacitinib to be an important new treatment option for adults with moderate-to-severe chronic plaque psoriasis.”

Top-line results from the first two studies from the OPT Program, OPT Compare and OPT Retreatment, were previously announced in October 2013, and these four studies, in addition to a long-term extension study, will form the planned psoriasis submission package to regulatory authorities in various markets. Pfizer currently intends to submit a supplemental New Drug Application (sNDA) to the U.S. Food and Drug Administration (FDA) for the approval of tofacitinib 5 mg and 10 mg twice-daily for the treatment of adults with moderate-to-severe chronic plaque psoriasis by early 2015.

About OPT Pivotal #1 (A3921078) and OPT Pivotal #2 (A3921079)

OPT Pivotal #1 and OPT Pivotal #2 were Phase 3, 52-week, multi-site, randomized, double-blind, placebo-controlled, parallel-group studies evaluating the safety and efficacy of tofacitinib 5 mg and 10 mg twice-daily in patients with moderate-to-severe chronic plaque psoriasis who are candidates for systemic therapy or phototherapy. There were over 900 patients randomized into each of the studies.

About the OPT Clinical Trial Program

The Phase 3 OPT clinical trial program consists of five studies (including one long-term extension study) evaluating oral tofacitinib 5 mg and 10 mg twice-daily in adults with moderate-to-severe chronic plaque psoriasis. It is a global, comprehensive clinical development program that includes over 3,600 patients in 36 countries, and is one of the largest global clinical trial programs in moderate-to-severe chronic plaque psoriasis to date. In addition to the OPT Pivotal #1 and OPT Pivotal #2 studies, the OPT Program includes the following Phase 3 studies of tofacitinib in adults with moderate-to-severe chronic plaque psoriasis:

  • OPT Compare (A3921080): A 12-week, Phase 3 study comparing the efficacy and safety of tofacitinib 5 mg and 10 mg twice-daily to high-dose ENBREL (etanercept) 50 mg twice-weekly as well as to placebo.
  • OPT Retreatment (A3921111): A Phase 3 study evaluating the efficacy and safety of the withdrawal from, and then the retreatment with, tofacitinib 5 mg and 10 mg twice-daily compared to placebo.
  • OPT Extend (A3921061): A long-term extension study evaluating the safety and tolerability of tofacitinib. Patients who participated in the Phase 2 trial or any of the other Phase 3 studies had the option, if eligible, to enroll in this study.

About Plaque Psoriasis

Psoriasis is a chronic, immune-mediated disease, affecting the skin and other organs, such as nails and joints. It affects approximately two-to-three percent of people worldwide and 7.4 million people in the United States.1,2,3,4,5,6,7 Due to inconsistent response to treatment, adverse effects, and the limited persistence of therapeutic effects of some therapies, a need for additional therapies for patients with moderate-to-severe chronic plaque psoriasis still remains.8,9,10 According to recently published surveys, approximately 50% of patients with psoriasis are dissatisfied with their treatment, and under-treatment represents a significant problem. Even though guidelines typically state that moderate-to-severe patients are candidates for systemic therapy – e.g., medicines given by mouth or an injection - many treated adult plaque psoriasis patients appear to be undertreated, with approximately 30% of treated moderate patients and 22% of treated severe patients receiving only topical therapies, like ointments and creams, in the U.S.11

Pfizer Inc.: Working together for a healthier world®

At Pfizer, we apply science and our global resources to bring therapies to people that extend and significantly improve their lives. We strive to set the standard for quality, safety and value in the discovery, development and manufacture of health care products. Our global portfolio includes medicines and vaccines as well as many of the world's best-known consumer health care products. Every day, Pfizer colleagues work across developed and emerging markets to advance wellness, prevention, treatments and cures that challenge the most feared diseases of our time. Consistent with our responsibility as one of the world's premier innovative biopharmaceutical companies, we collaborate with health care providers, governments and local communities to support and expand access to reliable, affordable health care around the world. For more than 150 years, Pfizer has worked to make a difference for all who rely on us. To learn more, please visit us at www.pfizer.com.

DISCLOSURE NOTICE: The information contained in this release is as of April 22, 2014. Pfizer assumes no obligation to update forward-looking statements contained in this release as the result of new information or future events or developments.

This release contains forward-looking information about tofacitinib, including its potential benefits and the anticipated submission of applications with regulatory authorities, that involves substantial risks and uncertainties. Such risks and uncertainties include, among other things, the uncertainties inherent in research and development, including, without limitation, the possibility of unfavorable clinical trial results; whether an sNDA will be filed in the U.S. in early 2015, and whether and when any applications may be filed with regulatory authorities in various other jurisdictions, for tofacitinib for the treatment of moderate-to-severe chronic plaque psoriasis; whether and when the FDA and regulatory authorities in other jurisdictions mayapprove any such applications, as well as their decisions regarding labeling and other matters that could affect its availability or commercial potential; and competitive developments.

A further description of risks and uncertainties can be found in Pfizer’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013 and in its subsequent reports on Form 10-Q and Form 8-K.

1 Levy L, Solomon S, Emer J. Dove Medical Press Ltd. Psoriasis: Targets and Therapy 2012:2 29–43.

2 Rachakonda T, Schupp CW, Armstrong AW. Psoriasis prevalence among adults in the United States. J Am Acad Dermatol 2014; 70 (3):512-16.

3 Augustin M, Alvaro-Gracia JM, Bagot M., et al. A framework for improving the quality of care for people with psoriasis. J Eur Acad Dermatol. 2012;26 (Suppl. 4):1–16.

4 Perera GK, Di Meglio P, Nestle FO. Psoriasis. Annu Rev Pathol Mech Dis. 2012;7:385-422.

5 Nestle FO, Kaplan DH, Barker J. Psoriasis. N Engl J Med. 2009;361(5):496-509.

6 Menter A, Gottlieb A, Feldman SR, et al. Guidelines of care for the management of psoriasis and psoriatic arthritis: Section 1. Overview of psoriasis and guidelines of care for the treatment of psoriasis with biologics. J Am Acad Dermatol. 2008;58(5):826-50.

7 Johnson MA, Armstrong AW. Clinical and histologic diagnostic guidelines for psoriasis: a critical review. Clinic Rev Allerg Immunol. 2013;44(2):166-172.

8 Perera GK, Di Meglio P, Nestle FO. Psoriasis. Annu Rev Pathol. 2012;7:385-422.

9 Johnson-Huang LM, Lowes MA, Krueger JG. Putting together the psoriasis puzzle: an update on developing targeted therapies. Dis Model Mech. 2012;5(4):423-433

10 Menter A. The status of biologic therapies in the treatment of moderate to severe psoriasis. Cutis.2009;84(Suppl 4):14-24.

11 Armstrong, A. Undertreatment, Treatment Trends, and Treatment Dissatisfaction Among Patients With Psoriasis and Psoriatic Arthritis in the United States. Findings From the National Psoriasis Foundation Surveys, 2003-2011. JAMA Dermatology. 2013; 5264.

Posted: April 2014

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