Phase I and Phase I/II DCVax(R)-Brain Data Continues to Show Significantly Improved Survival Rates for Brain Cance...( Year-end 2007 long-term follow-...),Health

Year-end 2007 long-term follow-up data continues to be positive

BETHESDA, Md., Feb. 20 /PRNewswire-FirstCall/ -- Northwest Biotherapeutics, Inc. (OTC Bulletin Board: NWBO; AIM: NWBT and NWBS) ("NWBT" or the "Company") today announced the most recent long-term follow-up data, as of year-end 2007, on disease progression and overall survival in patients taking part in its Phase I and Phase I/II clinical trials for newly diagnosed patients with Glioblastoma multiforme ("GBM"), the most aggressive form of brain cancer. The additional data covers the period from April 2007 through year-end 2007. During this time, none of the patients experienced disease progression (recurrence) and only one patient died (at 36.4 months). Thus, the data show that in the 19 clinical trial patients receiving DCVax(R)-Brain in addition to Standard of Care, both the median overall survival and the median time to disease progression (recurrence) are more than twice as long as in patients receiving the Standard of Care for GBM. Dr. Linda Liau, Associate Professor of Neurosurgery and Director of the Malignant Brain Tumor Program at the UCLA School of Medicine ("UCLA"), served as the Principal Investigator for the trial.

Since 2005, the Standard of Care for patients with GBM is surgery followed by a combination of radiation and daily Temodar(R) chemotherapy, and then 6 monthly cycles of Temodar chemotherapy. The studies defining this Standard of Care achieved a median time to progression of 6.9 months and a median overall survival of 14.6 months (Stupp, et. al., N Engl J Med, 352:987, 2005). Further data from UCLA have demonstrated a somewhat longer median time to progression of 8.1 months and median overall survival of 17.0 months in patients with GBM who received Standard of Care.

The year-end 2007 data obtained by the Company concerning the 19 patients from the two trials at UCLA with newly diagnosed GBM continue to be positive, with no patients progressing and onl
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