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News

Positive Phase II data on TRX4 (ChAglyCD3)

BTG : 13 May, 2007  (New Product)
BTG plc, the medical innovations company, notes that TolerRx, Inc., BTG
Louise Makin, Chief Executive Officer of BTG, commented:
“This study suggests TRX4 could be a real step forward in the treatment of type 1 diabetes. We look forward to further progress by TolerRx in developing this novel therapy.”

TRX4 is one of six pharmaceuticals commercialised by BTG that are currently under clinical development by BTG’s licensees. BTG has three other products undergoing clinical studies prior to commercialisation.

The full text of the announcement by TolerRx follows.
POSITIVE DATA FROM TYPE 1 DIABETES STUDY OF TOLERRX’S TRX4 PUBLISHED IN THE NEW ENGLAND JOURNAL OF MEDICINE

Short-term Administration with Novel Drug Candidate Significantly Reduces Insulin Need in Newly Diagnosed Type 1 Diabetics

The study was conducted by a team of clinicians and researchers from France, Belgium, Germany, and England and led by Dr. Lucienne Chatenoud, from the Hôpital Necker in Paris, as the Principal Investigator and Dr. Bart Keymeulen, from the Academic Hospital at Brussels Free University, VUB, as the clinical coordinator. The trial was undertaken by the JDRF Center for Beta Cell Therapy in Europe, directed by Dr. Daniel Pipeleers (Brussels Free University – VUB). The study was supported by the Juvenile Diabetes Research Foundation and was performed in collaboration with Dr. Herman Waldmann and his laboratory at the University of Oxford. TolerRx, Inc. is developing TRX4 for the treatment of patients with autoimmune diseases, including type 1 diabetes and psoriasis.

“Maintaining or improving beta cell function is a major achievement in the treatment of type 1 diabetics,” stated Dr. Chatenoud. “The results suggest that TRX4 therapy results in greater endogenous insulin production and a corresponding reduction in administered insulin need. TRX4 therapy would be expected to result in better long-term metabolic control for these patients.”

“We are very encouraged by the results of this study and the implications it has for modifying the disease course in patients with type 1 diabetes,” said Douglas J. Ringler, V.M.D., President and CEO of TolerRx. “We look forward to working with our dedicated investigators and regulatory agencies so that TRX4 can be definitively established as the accepted inductive therapy for type 1 diabetes.”

Study Results
The multicenter study included 80 subjects recently diagnosed with type 1 diabetes. Subjects in the trial were randomly assigned to receive either TRX4 (ChAglyCD3) or placebo for only six consecutive days. During the 18 months following treatment, subjects were monitored for daily insulin needs and endogenous insulin production as assessed by measuring C-peptide release induced by an intravenous glucose infusion. At six, 12, and 18 months, beta cell function was more effectively maintained in TRX4-treated subjects than in placebo-treated subjects.

Daily insulin dose increased in the placebo group, but not in the TRX4 group. The effect of TRX4 was most pronounced in the patient subgroup with better (greater than the median) beta cell function at study start. In this subgroup, mean insulin dose at 18 months was 0.22 IU/kg/day versus 0.61 IU/kg/day in the corresponding placebo subgroup (p <0.001). Seventy-five percent of subjects in the TRX4 subgroup received minimal doses of insulin (less than or equal to 0.25 IU/kg/day) compared to zero percent of subjects in the corresponding placebo subgroup. TRX4 administration was associated with transient symptoms of flu-like syndrome and transient EBV reactivation.

Study Design
This Phase II study was conducted at five research sites and was a double-blind, placebo-controlled randomized trial with 40 subjects receiving TRX4 and 40 receiving placebo. Subjects were given at least three insulin injections per day and monitored their blood glucose with the goal of maintaining glucose levels between 80-140mg/dl and HbA1c levels lower than seven percent.

About Type 1 Diabetes
Diabetes (medically known as diabetes mellitus) is the name given to disorders in which the body has difficulty regulating its blood glucose, or blood sugar, levels. There are two major types of diabetes: type 1 and type 2. Type 1, also called juvenile diabetes or insulin-dependent diabetes, is a disorder of the body's immune system. In type 1 diabetes, the pancreas produces little or no insulin as a result of the immune system attacking and destroying the insulin-producing beta cells in the pancreas. Therefore, type 1 diabetes patients require frequent administration of insulin therapy each day to control their blood sugar levels.

In the United States, approximately 1.3 million people have type 1 diabetes, and each year approximately 30,000 new patients are diagnosed with the disease, including 13,000 children.
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