( - Blood pressure reduction achieved at...)Hypertension Vaccine CYT006-AngQb Achieves Strong Blood Pressure,Reduction During Important Early Morning Period When Most Adverse,Cardiovascular Events Occur,Health

- Blood pressure reduction achieved at 8 am versus placebo: - 25 / - 13 mm Hg (systolic / diastolic, p<0.0001 / p=0.0035)
- Blood pressure reduction dependent on vaccine dose and induced antiangiotensin II antibody levels
- Detailed results presented today at the Seventeenth European Meeting on Hypertension in Milan, Italy

SCHLIEREN (Zurich), Switzerland and MILAN, Italy, June 17, 2007 - Cytos Biotechnology AG (SWX:CYTN) presented today new clinical data on its hypertension vaccine CYT006-AngQb at the Seventeenth European Meeting on Hypertension in Milan, Italy. The vaccine candidate was tested in a placebocontrolled, double-blind phase IIa clinical trial in 72 patients with mild to moderate hypertension.

On January 26, 2007, Cytos Biotechnology reported top-line data from this study, which showed that the 300 ?g dose of the vaccine was safe, very well tolerated and efficacious in lowering day-time ambulatory blood pressure. The new data presented today show a particularly strong efficacy of the vaccine in early morning hours, a critical time period when serious cardiovascular events frequently occur. The graph below shows the mean ambulatory blood pressure during the 24-hour measurement period 14 weeks after the first injection of the vaccine or of placebo. The early morning rise of blood pressure starting at 5 am was significantly suppressed by the vaccine, leading at 8 am to a change from baseline of the blood pressure of - 25 / - 13 mm Hg compared to placebo (SBP / DBP, p<0.0001 / p=0.0035).


*SEE ATTACHMENT FOR FIGURE*

The strong suppression of the early morning rise of blood pressure was associated with an exceptionally low increase in plasma renin concentration (PRC) from a mean renin concentration of 5.1 pg/ml at baseline to 6.3 pg/ml at week 14 (p=0.02). Inhibition of the renin-angiotensin system by small molecule drugs is known to induce a reactive rise of the plasma renin concentrati
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