( LUND June 15 2007-Active Biotech (OM...)New Positive Pre-clinical Data for Active Biotech's RA Project I-3D,Health

LUND, June 15, 2007-Active Biotech (OMX Nordic: ACTI) presented pre-clinical results for the project I-3D at the annual EULAR (The European League Against Rheumatism, www.eular.org ) conference, June 13-16*.

"The new pre-clinical data presented show that I-3D has a significant inhibitory effect on disease development in an experimental model for rheumatoid arthritis (RA)", commented Sven Andréasson, President & CEO Active Biotech.

An additive inhibitory effect on disease development is achieved when I-3D is combined with methotrexate, an anti-proliferative drug widely used for the treatment of various inflammatory disorders and cancer.

The results strengthen further clinical development of I-3D as monotherapy or in combination with methotrexate.

Lund, June 15, 2007

Active Biotech AB (publ)

Sven Andréasson President and CEO

About I-3D The I-3D compound is a novel small molecule inhibitor of human dihydroorotate dehydrogenase (DHODH). Inflammatory diseases such as RA involve rapidly proliferating T cells with an exceptional requirement for de novo pyrimidine biosynthesis. DHODH inhibition results in inhibition of de novo pyrimidine synthesis and thereby inhibition of T-cell proliferation.

In May 2006, Active Biotech and Chelsea Therapeutics International Ltd (NASDAQ:CHTP) signed an agreement for the co-development and commercialization of I-3D. Under the agreement, Active Biotech and Chelsea will jointly conduct and fund the clinical development of the I-3D portfolio.

A candidate drug is planned to be selected this year for further clinical trials in 2008.

*For further information and to view the complete poster "ABR-224050: a novel dihydroorotate dehydrogenase inhibitor suppressing disease development in collagen induced arthritis", please visit