TiGenix: TiGenix completes treatment in Phase I sepsis challenge trial with Cx611
- Category: DNA RNA and Cells
- Published on Thursday, 12 March 2015 08:53
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- All 32 volunteers recruited and dosed
- No serious adverse events reported
- Biological effect and safety results to be released second quarter of 2015
LEUVEN, Belgium I March 12, 2015 I TiGenix NV (Euronext Brussels: TIG), an advanced biopharmaceutical company focused on developing and commercialising novel therapeutics from its proprietary platform of allogeneic, expanded adipose-derived stem cells, or eASCs, in inflammatory and autoimmune diseases, announced today that it has completed the treatment of 32 subjects in its Phase I trial of Cx611 in a sepsis challenge model. No serious adverse events have been reported. Full results will be announced in the second quarter of 2015.
Cx611 is an intravenously-administered product of allogeneic expanded adipose-derived stem cells (eASCs). Its efficacy in significantly reducing mortality has been demonstrated in several animal models of sepsis through a combination of reduced inflammation, production of anti-microbial effectors, and increased phagocytosis.
This trial, codenamed CELLULA, is designed to confirm the safety and demonstrate the anti-inflammatory effect of Cx611 on the sepsis-like clinical symptoms and immunological response elicited by an intravenous administration of a bacterial endotoxin (lipopolysaccharide) in healthy volunteers. The trial is a placebo-controlled dose-ranging study (3 doses of Cx611) in 32 healthy male volunteers. It is being conducted in the Academic Medical Center of the University of Amsterdam in the Netherlands, which is a centre of excellence for such trials.
No serious adverse events have been reported. Complete study results are expected in the second quarter of 2015.
"Sepsis is the leading cause of death in hospitals in the Western World. Current treatments inadequately address the complex immune-modulatory pathways in sepsis pathogenesis," said Dr Marie Paule Richard, Chief Medical Officer of TiGenix. "Cx611 offers a novel mechanism of action that is potentially able to address through multiple pathways the underlying immune dysregulation. We look forward to the complete results of this study and then to further develop Cx611 for patients with severe sepsis."
Cx611 is an intravenously-administered product of allogeneic expanded adipose-derived stem cells (eASC's). TiGenix is currently developing Cx611 for patients with early rheumatoid arthritis and for patients with severe sepsis. For the first of these two indications, in 2013 TiGenix reported positive 6-month safety data from its Phase IIa study of Cx611 in refractory rheumatoid arthritis, as well as a first indication of therapeutic activity using standard outcome measures and biologic markers of inflammation for at least three months after dosing. The multicentre, randomised, double-blind, placebo-controlled Phase IIa trial enrolled 53 patients with active refractory rheumatoid arthritis (mean time since diagnosis 15 years), under treatment with at least one non-biologic disease-modifying anti-rheumatic drug (DMARD), who failed to respond to at least two biologic drugs (mean previous treatment: 3 or more DMARDs and 3 or more biologic drugs). The study design was based on a three-cohort dose-escalating protocol. For both the low and medium dose regimens, 20 patients received active treatment versus 3 patients on placebo; for the high dose regimen, 6 patients received active treatment versus 1 on placebo. Patients were dosed at Days 1, 8, and 15 and were followed up monthly over a six-month period. Follow-up consisted of a detailed monthly work-up of all patients, measuring all pre-defined parameters. The aim was to evaluate the safety, tolerability and optimal dosing over the full 6 months of the trial, as well as exploring therapeutic activity. Only one patient suffered serious adverse events that led to a discontinuation of treatment. All other side effects were mild and transient indicating that eASCs are well tolerated and associated with an overall acceptable safety profile. Measured clinical activity scores were ACR201, ACR501, ACR701, EULAR2 response rates, and the disease activity score, DAS283. To gain a first insight into therapeutic activity, these parameters were evaluated every month for six months. Patients receiving Cx611 had higher ACR scores, a better EULAR response, and higher DAS28 scores than patients receiving placebo over three months, and a sustained benefit over six months. The Company is currently working with clinical experts to complete a protocol for a randomised, double-blind, comparative Phase II study to test the efficacy of Cx611 in patients exhibiting substantial disease activity of rheumatoid arthritis despite treatment with methotrexate and corticosteroids, but unexposed to a biological drug. Recruitment for the proposed study could start in the fourth quarter of 2015 and TiGenix would expect final results to be available by the end of 2017. In severe sepsis, as well as additional animal model testing, TiGenix has started a randomised, placebo-controlled trial to test the mechanism of action of Cx611 in healthy volunteers challenged with a bacterial endotoxin (lipopolysaccharide), a potent pro-inflammatory constituent of the outer membrane of Gram-negative bacteria, which elicits an inflammatory response inducing sepsis-like clinical symptoms. Subject recruitment is completed and TiGenix expects to have results from this study during the second quarter of 2015 and then to follow up with a phase II trial of Cx611 as an add-on therapy to the standard of care in patients with severe sepsis.
1 ACR 20 means a 20% improvement in tender or swollen joint counts as well as 20% improvement in at least three of the following five criteria: patient assessment, physician assessment, erythrocyte sedimentation rate, pain scale and functional questionnaire. The ACR50 and ACR70 categories adhere to the same criteria, but for 50% and 70% improvement, respectively.
2 EULAR, European League Against Rheumatism
3 DAS28, Disease Activity Score 28 joint count
TiGenix NV (Euronext Brussels: TIG) is an advanced biopharmaceutical company focused on developing and commercialising novel therapeutics from its proprietary platform of allogeneic, or donor-derived, expanded adipose-derived stem cells, known as eASCs, in inflammatory and autoimmune diseases. Two products from this technology platform are currently in clinical development. Cx601 is in Phase III for the treatment of complex perianal fistulas in Crohn's disease patients. Cx611 is in Phase IIb for early rheumatoid arthritis, and in Phase Ib for severe sepsis. TiGenix also developed ChondroCelect, an autologous cell therapy product for cartilage repair of the knee, which was the first Advanced Therapy Medicinal Product (ATMP) to be approved by the European Medicines Agency (EMA). From June 2014, the marketing and distribution rights of ChondroCelect have been exclusively licensed to Sobi for the European Union (except for Finland, where it is distributed by the Finnish Red Cross Blood Service), Norway, Russia, Switzerland and Turkey, and the countries of the Middle East and North Africa. TiGenix is headquartered in Leuven (Belgium) and has operations in Madrid (Spain). For more information, please visit www.tigenix.com.