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SITAXSENTAN - NEW PRIMARY PULMONARY HYPERTENSION DRUG (PPH)

Sitaxsentan Results in Pulmonary Arterial Hypertension Published in The American Journal of Respiratory and Critical Care Medicine
Tuesday February 17, 7:00 am ET

HOUSTON, Feb. 17 /PRNewswire-FirstCall/ -- Encysive Pharmaceuticals today announced the publication of an article titled "Sitaxsentan Therapy for Pulmonary Arterial Hypertension" in the February 15 issue of the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine (AJRCCM) (Vol. 169, pp. 441-447). The full article can be found on American Thoracic Society's website at http://ajrccm.atsjournals.org .

The reported study is based on Encysive's Phase IIb/III STRIDE-1 (Sitaxsentan To Relieve ImpaireD Exercise) clinical study in Pulmonary Arterial Hypertension (PAH). The author and lead investigator of the study, Robyn J. Barst, M.D., Director, New York Presbyterian Pulmonary Hypertension Center, Columbia University College of Physicians and Surgeons, New York, NY, concluded that sitaxsentan at doses of 100 mg or 300 mg administered orally once daily improved six-minute walk distance by 35 and 33 meters, respectively, after 12 weeks of treatment in PAH patients. In addition, New York Heart Association (NYHA) functional class, cardiac output and pulmonary vascular resistance also improved.

The 178 patient STRIDE-1 trial included a broader range of patients than previously studied in the comparable multi-center trial with the marketed, non-selective endothelin receptor antagonist bosentan. Sitaxsentan is a selective endothelin A receptor antagonist.

"While each of the patient groups appeared to have benefited from sitaxsentan treatment, when data on the STRIDE-1 patients who would have qualified for inclusion in the bosentan BREATHE-1 trial were analyzed, the treatment effect for sitaxsentan increased to 65 meters in the six-minute walk test," reported Dr. Barst. "This compares to the reported 44 meter treatment effect for bosentan in the 213-patient pivotal BREATHE-1 study. The ongoing pivotal study, STRIDE-2, evaluates both endothelin receptor antagonists."

"This study published in the AJRCCM supports our strategy in developing sitaxsentan," commented Bruce D. Given, M.D., President and CEO of Encysive. "Our second pivotal study, STRIDE-2, is currently enrolling patients with Class II-IV pulmonary arterial hypertension in North America and Europe. We believe results from this study, combined with results from other trials, will further define the ability of sitaxsentan to successfully treat a broad range of patients diagnosed with PAH."

About STRIDE-1 and STRIDE-2

The STRIDE-1 trial was a randomized, double-blind, placebo-controlled, 12-week study in 178 patients. Included were patients with NYHA Class II-IV primary pulmonary hypertension, PAH related to connective tissue disease or PAH related to congenital heart disease; there was no upper limit to baseline walk for inclusion in the study, i.e. patients with baseline six-minute walk >450 meters were not excluded. Patients received either sitaxsentan 100 mg, sitaxsentan 300 mg or placebo treatment once a day and were treated for 12 weeks. Sitaxsentan 100 mg and 300 mg provided similar improvements in exercise capacity (six-minute walk), functional class and hemodynamics.

Of the 178 patients enrolled in STRIDE-1, none of the patients in the 100 mg group discontinued due to adverse events or for other reasons, versus five patients from the placebo group and seven from the 300 mg group. The most frequent adverse events that occurred in patients receiving sitaxsentan and that were more common than in placebo-treated patients were headache, peripheral edema, nausea, nasal congestion and dizziness. Liver abnormalities have previously been recognized as complications related to the endothelin antagonist class of drugs. Liver abnormalities in the STRIDE-1 trial were defined as elevated serum aminotransferase values that were more than three times normal. Incidences of liver abnormalities in STRIDE-1, which reversed in all cases, were 3% for the placebo group, 0% for the sitaxsentan 100 mg group and 9.5% for the sitaxsentan 300 mg group. When experiences from STRIDE-1 and its extension trial, resulting in total patient exposures of as long as 58 weeks are considered, 5% of patients receiving 100 mg and 21% receiving 300 mg of sitaxsentan developed elevations. All elevations resolved with discontinuation of study drug.

Given the similarity in efficacy between the 100 mg and 300 mg dose groups and the improved safety profile of the 100 mg dose, 100 mg once daily has been selected as the maximum dose in the ongoing clinical program.

STRIDE-2 is a 240 patient trial including patients with WHO (NYHA modified for PAH) Class II-IV PAH of primary or secondary etiologies (due to collagen vascular disease or certain congenital heart defects) with an entry six-minute walk distance of less than or equal to 450 meters. Patients are being randomized to receive placebo, 50 or 100 mg of sitaxsentan or bosentan. The STRIDE-2 program is being conducted under a Special Protocol Assessment with the U.S. Food and Drug Administration.

About Sitaxsentan and PAH

Sitaxsentan is a small molecule that antagonizes the action of endothelin, a potent mediator of blood vessel constriction and growth of smooth muscle in vascular walls. Endothelin receptor antagonists may prove to be effective in the treatment of a variety of diseases where the regulation of vascular constriction is important. Sitaxsentan is a highly selective endothelin A receptor antagonist and is 6500 times more selective for endothelin A than endothelin B receptors.

Pulmonary arterial hypertension is a condition that involves high blood pressure and structural changes in the walls of the pulmonary arteries, which are the blood vessels that connect the right side of the heart to the lungs. PAH causes shortness of breath, limits activity and shortens life-expectancy. PAH is estimated to afflict around 100,000 people worldwide, many of whom are young adults.

About Encysive Pharmaceuticals

Encysive Pharmaceuticals, a biopharmaceutical company focused on the discovery, development and commercialization of novel drugs, is recognized for our expertise in small molecule drug development and vascular biology. Argatroban, our first FDA-approved product, is being marketed by GlaxoSmithKline for heparin-induced thrombocytopenia. Encysive Pharmaceuticals is in Phase III development of the endothelin antagonist, sitaxsentan, for pulmonary arterial hypertension. Our majority-owned affiliate, Revotar Biopharmaceuticals AG, is in Phase II development with the selectin antagonist bimosiamose in asthma, psoriasis and atopic dermatitis. Encysive Pharmaceuticals has several other research and development programs ongoing for a range of cardiovascular and inflammatory diseases. To learn more about Encysive Pharmaceuticals please visit our Web site: www.encysive.com .

This press release contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements are subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those projected. Among those risks, trends and uncertainties are timing and cost of our clinical trials, attainment of research and clinical goals and milestones of product candidates, attainment of required government approvals, sales levels of our products and availability of financing and revenues sufficient to fund development of product candidates and operations. In particular, careful consideration should be given to cautionary statements made in the various reports Encysive Pharmaceuticals, including as Texas Biotechnology Corporation, has filed with the Securities and Exchange Commission. The company undertakes no duty to update of revise these forward-looking statements. Source: Encysive Pharmaceuticals

 

PPH LAWSUITS - LEGAL & FINANCIAL HELP FOR PPH VICTIMS

 Sitaxsentan, pph, primary pulmonary hypertension,  sitaxsentan for PPH, Pulmonary Arterial Hypertension, new pph drug, Encysive Pharmaceuticals ,phase II study, phase III study, study results, pph drug study, ppl lawsuit, sytaxsentan,citaxsentan, study, bosentan, tracleerIf you or a loved one have been diagnosed with Primary Pulmonary Hypertension (PPH), then you may have a right to file a individual legal action against the manufacturers of the diet pills or other products that caused your PPH. Due to the nature of this serious and devastating disease process, PPH patients are urged to contact an attorney immediately after he or she has been informed of their Primary Pulmonary Hypertension diagnosis. Many important legal issues need to be addressed early after a PPH diagnosis, that can affect the outcome of the PPH litigation. Call us for a Free Confidential Consultation. Talk with a Board Certified Personal Injury Trial Lawyer about your legal rights of a PPH claim against the diet drug industry and others. No Fees or Expenses Charged unless we make a Recovery for You. 

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PPH LAWYER

Primary Pulmonary Hypertension (PPH) Legal Assistance LawyerIf you or a loved one took diet drugs and recently have been given a diagnosis of Primary Pulmonary Hypertension (PPH), idiopathic pulmonary hypertension, pulmonary arterial hypertension, PAH or pulmonary hypertension, then call us for a Free PPH Lawsuit Consultation. Talk to a Personal Injury Trial Lawyer with over 20+ years of product liability trial experience that understands the complications of PPH, legal options for patients with PPH and diet drug related PPH lawsuits and litigation.

Since 1997, we have aggressively represented PPH patients in diet drug lawsuits against the makers of Fen -Phen, Redux and PPH lawsuits against the nutritional supplement industry on herbal ephedrine / ephedra / ma huang PPH lawsuits. Get PPH Lawsuit Help. Talk to a PPH Attorney now. Call Toll Free 1-800-883-9858 or E-mail us.

Primary Pulmonary Hypertension (PPH) Legal Assistance Lawyer

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Primary Pulmonary Hypertension (PPH) Legal Assistance LawyerIf you have been diagnosed with PPH then it very important that you talk with an attorney. Mr. Willis is a Board Certified Personal Injury Trial Lawyer, certified by the Texas Board of Legal Specialization since 1988. No Fees or Court Costs or Expenses charged to the client unless we obtain a recovery for you. We never send you a bill for our services! Call us if you have a question.

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