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CSL Therapy That Mimics 'Good' Cholesterol May Reduce Plaque Volume,in Coronary Arteries

NEW ORLEANS, March 26, 2007 /PRNewswire/ -- CSL Limited today announced results from a study published in the Journal of the American Medical Association that suggest infusions of a novel new drug, CSL-111, to acutely raise HDL ("good" cholesterol) levels, may reduce the amount of plaque in the coronary arteries of patients with a recent episode of acute coronary syndrome (ACS).

ACS is the term used to describe unstable angina and myocardial infarction (heart attack). It is estimated to be responsible for up to 600,000 admissions to the hospital per year in the US. Despite improvements in management over many years, ten to fifteen percent of patients still experience a serious cardiovascular problem in the 12 months following an episode of ACS.

CSL-111 is a patented biologic product, consisting of apolipoprotein A-I purified from human plasma that is reconstituted to form a particle that chemically and biologically resembles human HDL. A 40 mg/kg dose of CSL-111 results in an approximately 50 percent elevation in blood HDL levels, which remain above normal for one week. It was discovered and is manufactured at CSL Behring in Switzerland.

The Effect of Reconstituted HDL on Atherosclerosis - Safety and Efficacy (ERASE) trial was a phase 2, randomized, blinded, placebo-controlled study conducted at 17 sites throughout Canada and coordinated by the Montreal Heart Institute. The trial examined whether four infusions of CSL-111, given at weekly intervals to patients with a recent episode of ACS, could reduce the volume of plaque in the coronary arteries. Assessment of the arteries was performed using intravascular ultrasound (IVUS) and quantitative coronary angiography (QCA) before and two-three weeks after the treatment. IVUS is a technique in which a tiny ultrasound probe is inserted into the coronary arteries to determine the change in plaque during treatment. Coronary angiography is an X-ray examination of the blood vessels.

183 patients received placebo (n=60), 40 mg/kg (n=111) or 80 mg/kg (n=12) of CSL-111. The higher dosage of CSL-111 was discontinued early because of transient liver function test abnormalities. The 40mg/kg dose was safe and generally well tolerated.

The results were based on data from 145 patients who had two sequential IVUS procedures. The main findings were that there was a reduction in coronary plaque volume after infusions of CSL-111 of 3.4 percent and after placebo of 1.6 percent, which were not statistically significantly different. However, when compared to baseline, the reduction for patients infused with CSL-111 was statistically significant (p< 0.001), but this was not the case in the placebo group. Other assessments of the plaque, such as characterization indexes or changes in plaque that are different than volume measurements, on IVUS and coronary score on QCA, were significantly different between CSL-111 and placebo. Interestingly, the difference in coronary score between patients that had 4 weeks of CSL-111 and those given placebo was similar to those observed after two years of statin treatment (compared with no statin).

"Overall, these results strongly suggest that CSL-111 is biologically active, and that short term infusions of CSL-111 result in a rapid, favourable effect on coronary atherosclerotic plaque," said Jean-Claude Tardif, M.D., of the Montreal Heart Institute, University of Montreal, and lead author of the study. "These data strongly support the conduct of further clinical studies to assess whether CSL-111 will provide a clinical benefit to patients with ACS."

"This study is a significant step in our development of CSL-111," said Dr. Andrew Cuthbertson, Chief Scientific Officer, CSL Ltd. "CSL recognizes the value that CSL-111 may provide in preventing further cardiovascular events in patients with ACS. We are committed to exploring the full therapeutic potential of this treatme nt and will consult with international experts to evaluate next steps."


The materials in this presentation speak only as of the date of these materials, and include forward looking statements about our financial results and estimates, business prospects and products in research that involve substantial risks and uncertainties, many of which are outside the control of, and are unknown to, CSL. You can identify these statements by the fact that they use words such as "anticipate," "estimate," "expect," "project," "intend," "plan," "believe," "target," "may," "assume," and other words and terms of similar meaning in connection with any discussion of future operating or financial performance. Among the factors that could cause actual results to differ materially are the following: the success of research and development activities, decisions by regulatory authorities regarding whether and when to approve our drug applications as well as their decisions regarding labeling and other matters that would affect the commercial potential of our products; competitive developments affecting our current growth products; the ability to successfully market new and existing products in Australia and other countries; difficulties or delays in manufacturing; trade buying patterns, fluctuations in interest and currency exchange rates; legislation or regulations throughout the world that affect product production, distribution, pricing, reimbursement or access; legal defense costs, insurance expenses, settlement costs and the risk of an adverse decision or settlement relating to product liability, patent protection or governmental investigations, growth in costs and expenses; and CSL's ability to protect its patents and other intellectual property throughout the world. The statements being made in this presentation do not constitute an offer to sell, or solicitation of an offer to buy, any securities of CSL.

CSL is a global specialty biopha rmaceutical company that develops, manufactures and markets products to treat and prevent serious human medical conditions. Innovation and new product development for unmet medical needs continue to drive CSL's growth.

The CSL Group includes: CSL Behring, CSL Bioplasma and CSL Biotherapies

For more information about CSL Limited, visit .

CONTACT: Media, Australia and New Zealand, Dr. Rachel David, Director ofPublic Affairs, CSL Limited, +61 (0) 401 775 779, ,USA, Sheila Burke, Director of Communications, CSL Behring,+1-484-919-2618, , or Nora Plunkett, TheReilly Group, +1-773-330-5540, , orInvestors, Australia, Mark Dehring, Director of Investor Relations, CSLLimited, +61 3 9389 2818,

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