Manhattan Pharmaceuticals Obesity Drug Safe in Phase Ia Study

Prior Animal Studies Suggest This Experimental Drug Resets The Brain's 'Appetite Meter'


NEW YORK, Sept. 7, 2005 (PRIMEZONE) -- Manhattan Pharmaceuticals, Inc. (OTCBB:MHTT) said Oleoyl-estrone, its experimental obesity drug, was shown to be safe with no serious adverse events noted in a Phase Ia study of 36 obese volunteers.

The results were announced this morning at the Oppenheimer & Co. Diabetes Conference at the Warwick Hotel during a presentation by Manhattan's chief executive officer, Douglas Abel.

The dose-escalating study was conducted to measure the pharmacokinetic profile of Oleoyl-estrone (OE), as well as its safety and tolerability in obese males and females. Twelve of the 36 patients received placebo and 24 received a single dose of OE in one of six strengths ranging from 1mg to 150mg.

A follow-on study, a Phase Ib, will assess the drug's safety and tolerability in 24 obese volunteers in four cohorts of six patients each receiving either placebo or OE in doses ranging from 10mg to 150mg for seven consecutive days. The company anticipates releasing additional data from these studies in the early Fall.

OE is an orally administered small molecule that lowers the appetite setting in the brain's ponderostat, decreasing food intake without affecting energy expenditure. It has been shown to cause significant weight loss in extensive preclinical studies with lean and obese animals, even in the presence of abundant food and water.

Obesity is one of the most common metabolic disorders in the world. Nearly 61 percent of all Americans are considered to be overweight, and 26 percent are considered to be obese. The World Bank estimates that obesity alone accounts for more than 12 percent of the U.S. national health care budget. The National Institutes of Health estimated that direct costs for the treatment of obesity in 1988 were in excess of $45 billion and accounted for nearly ten percent of the total national cost of health care; a decade later, annual direct costs for the treatment of obesity had risen to $102 billion. As these statistics illustrate, obesity is a rapidly growing, costly disease for which there is currently no effective treatment. Moreover, diet and physical exercise regimens are difficult to maintain. As a result, most overweight patients can lose only moderate amounts of weight, and usually only for a short period of time. The current medications for the treatment of obesity have significant side effects that limit their use.

Manhattan believes that a safe, effective, orally administered compound that not only produces, but also sustains weight loss would be a breakthrough in the treatment of obesity, and would represent a significant advantage over currently available treatments. The company estimates that the future market opportunity is in the multi-billions of dollars range, given the number of individuals in the U.S. suffering from obesity and the rapid growth of the problem globally.

An archived version of Mr. Abel's presentation at the Oppenheimer & Co, Diabetes Conference will be available for 30 days at: http://www.internetvideochannel.com/oppenheimer/diabetes.htm

About Manhattan Pharmaceuticals

Manhattan Pharmaceuticals, Inc. (www.manhattanpharma.com), a development stage pharmaceutical company, acquires and develops proprietary prescription drugs for large, underserved patient populations. In view of the worldwide obesity epidemic, the company is developing OE, an orally administered novel therapeutic for weight loss. To meet the needs of other major, underserved medical markets while lowering development risks, Manhattan Pharmaceuticals is also developing PTH (1-34), a peptide believed to be a regulator of epidermal cell growth, for psoriasis and Propofol Lingual Spray, a convenient, proprietary lingual spray formulation of propofol, the world's best-selling general anesthetic, as a sedative-hypnotic for use during diagnostic and therapeutic procedures.

About Redington

Redington, Inc. is a financial communications and investor relations firm with a specialty practice for emerging life sciences companies. It provides a full range of communications and corporate services, including message development, presentation structure and content, market road shows, editorial products including executive speeches, news releases, investor literature and annual reports, media relations, institutional and analyst introductions, and broker relationship management. For more information visit www.redingtoninc.com.

This news release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements are valid only as of today, and we disclaim any obligation to update this information. These statements are subject to known and unknown risks and uncertainties that may cause actual future experience and results to differ materially from the statements made. These statements are based on our current beliefs and expectations as to such future outcomes. Drug discovery and development involve a high degree of risk. Factors that might cause such a material difference include, among others, uncertainties related to the ability to attract and retain partners for our technologies, the identification of lead compounds, the successful preclinical development thereof, the completion of clinical trials, the FDA review process and other governmental regulation, our pharmaceutical collaborator's ability to successfully develop and commercialize drug candidates, competition from other pharmaceutical companies, product pricing and third party reimbursement, and other factors described in our filings with the Securities and Exchange Commission.



            

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