SCOTTSDALE, AZ--(Marketwire - February 22, 2008) - Medistem Laboratories, Inc. (OTCBB: MDSM) (Frankfurt: S2U) announced today the publication of a paper entitled “Antigen-specific therapy of rheumatoid arthritis” in the February issue of the peer-reviewed journal Expert Opinion on Biological Therapies. The article, which was written by scientists at Medistem, the University of Western Ontario, and the University of Toronto, describes methods of selectively inhibiting pathological immune responses in arthritis patients. An abstract of the article may be found at http://www.expertopin.com/doi/abs/10.1517/14712598.8.2.191.