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Thursday, 07/28/2005 9:35:46 AM

Thursday, July 28, 2005 9:35:46 AM

Post# of 252300
GTCB and Scancell Collaborate on SC101 Antibody

http://biz.yahoo.com/bw/050728/285572.html?.v=1

>>GTC Biotherapeutics and Scancell Collaborate on SC101 Antibody

Thursday July 28, 9:28 am ET

FRAMINGHAM, Mass. and NOTTINGHAM, U.K.--(BUSINESS WIRE)--July 28, 2005--GTC Biotherapeutics, Inc. ("GTC", Nasdaq: GTCB) and Scancell Limited ("Scancell") announced that they have signed a collaboration agreement to evaluate the expression of Scancell's SC101 anti-cancer monoclonal antibody (MAb) using GTC's transgenic production platform. Their agreement contemplates that both companies will work toward the establishment of a definitive agreement for the potential clinical development of SC101.

"We look forward to demonstrating the value offered by transgenic technology for the production of antibody products such as SC101," noted Gregory Liposky, GTC's Senior Vice President, Operations. "GTC's technology offers significant advantages for the development of proteins that are projected to be required in large commercial production quantities, when approved, and we believe we can assist Scancell in realizing that potential value."

Commenting on the agreement, Michael Capaldi, Chief Executive Officer of Scancell, said: "We are very pleased to be working with GTC. This agreement offers Scancell the opportunity to establish development of what we believe will be a very large scale product at significantly lower capital investment."

SC101 is a MAb that targets Lewis y/b. Lewis y/b is a cell surface carbohydrate blood group antigen whose expression is very low in normal tissue but is over-expressed on breast, colorectal, endometrial, kidney, lung, pancreas and stomach tumours. Mouse antibodies recognizing Lewis y/b have induced tumor cell death and inhibited growth of various tumor lines. In animal studies, tumor growth was inhibited by anti-Lewis y/b antibodies alone, and especially when combined with 5-fluorouracil, an antimetabolite that disrupts cancer cell growth.

About GTC Biotherapeutics

GTC Biotherapeutics is a leader in the development, production, and commercialization of therapeutic proteins through transgenic animal technology. GTC currently has five products in its internal pipeline and a portfolio of external program production opportunities. GTC's lead program is ATryn®, its recombinant form of human antithrombin. A Market Authorization Application is under review by the European Medicines Agency for the use of ATryn® in patients with a hereditary antithrombin deficiency. In addition to the ATryn® program, GTC is developing a recombinant human alpha-1 antitrypsin, a recombinant human albumin, a malaria vaccine, and a CD137 antibody to stimulate the immune system as a potential treatment for solid tumors. In its external programs, GTC's technology is used to develop transgenic production of its partners' proprietary products, including both large-volume protein therapeutics as well as products that are difficult to produce in significant quantities from conventional recombinant production systems. One of the external programs is in clinical trials with a transgenically produced product. Additional information is available on the GTC web site, http://www.gtc-bio.com.

This press release contains forward-looking statements [etc.]

About Scancell

Scancell Ltd is a company focused on the discovery and development of products that harness the immune system in a unique way to treat or prevent cancer. The Company, which currently employs 12 individuals, has secured GBP 4.6million of private equity and commercial funding. The Company has built an early stage product pipeline based upon two platforms: directly killing MAbs ('killer' MAbs) and its patent protected ImmunoBody® vaccine platform. 'Killer' MAbs are raised against 'cocktails' of primary human tumours resulting in MAbs that recognize clinically relevant targets. The Company screens for MAbs that directly kill tumour cells (i.e. without the need for antibody-dependant cellular cytotoxicity (ADCC) or complement mediated cytotoxicity (CDC)) and have an additive and/or synergistic killing effect in the presence of chemotherapeutics. Scancell has three such products in pre-clinical development and a number of further 'killer' MAbs in research. Scancell's ImmunoBody® technology uses human antibodies as vectors to target clinically relevant T-cell epitopes to activated dendritic cells via the high affinity CD64 receptor thereby initiating cellular immunity against cancers or chronic infectious diseases. For more information about Scancell visit www.scancell.co.uk
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