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Intercept extends platelet storage time upto 7 days, says Cerus

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Friday, January 15, 2010, 15:18 This news item was posted in medical devices category and has 0 Comments so far.

Intercept, a pathogen inactivation system which can keep the blood components from infection, is found to be able to extend the storage of platelets upto 6 or 7 days.

Intercept-treated platelet components were found to be effective for patient support following extended six and seven day storage in a clinical study conducted at four sites in Europe, according to Cerus Corporation.

The ability to store platelets longer than five days can be critical to maintaining an adequate supply.

However, extended storage of conventional platelets creates an increased risk of transfusion-transmitted bacterial infection.

In this case, Intercept treatment with its capacity to inactivate bacteria while maintaining platelet functionality contributes to guaranteeing both platelet safety and availability, stated Dr. Miguel Lozano of the Hospital Clinic in Barcelona, Spain, the study’s lead investigator.

The Intercept Blood System for platelets is designed to reduce the risk of transfusion-transmitted diseases by inactivating a broad range of pathogens such as viruses, bacteria and parasites that may be present in donated blood.

The nucleic acid targeting mechanism of action allows Intercept treatment to inactivate both established transfusion threats, such as hepatitis, HIV, West Nile virus and bacteria, as well as emerging pathogens such as influenza, malaria and dengue.

These data further confirm the safety and therapeutic efficacy of platelets treated with the Itercept Blood System, a pathogen inactivation treatment designed to protect against transfusion-transmitted diseases.

In accordance with CE marking, Intercept platelet components are approved for storage up to seven days subject to local regulatory guidelines.

The purpose of the 201-patient study was to provide additional information for clinicians regarding the safety and efficacy of Intercept platelets compared to conventional platelets stored for six to seven days prior to transfusion. Most prior Intercept clinical studies have included platelet units stored only up to five days.

The randomized, controlled, double-blinded study included platelet-deficient cancer patients at four medical centers in Spain, the United Kingdom, Sweden and France.

The trial met its primary endpoint, defined as statistical non-inferiority of the Intercept platelet one-hour corrected count increment compared to conventional platelet components.

The corrected count increment measures the increase in the patient’s platelet count following a platelet transfusion, adjusted for dose and patient blood volume.

The absolute difference in one-hour corrected count increment between the Intercept and control groups was approximately 13 percent, similar to differences observed in previous studies.

Despite testing and other measures, bacterial contamination of conventional platelet components persists, and concern has led to storage limits of four or five days in many regions.

Collection and supply logistics have a significant impact on cost, and are particularly challenging over holiday periods when donation rates decline.

Moreover, Germany’s recent one day reduction of the conventional platelet storage limit, to four days, has resulted in wastage rates approaching 20 percent in some centers.

Certain countries have granted storage extensions for up to seven days when anti-bacterial measures, including pathogen inactivation, are used during platelet production.

In contrast to bacterial detection screening, Intercept pathogen inactivation allows earlier release of platelets and provides protection against a broader spectrum of transfusion-transmitted diseases.

Intercept platelet system was granted CE mark registration in 2002, and subsequently received additional European regulatory approvals in France (Afssaps), Switzerland (Swissmedic), and Germany (Paul Ehrlich Institute marketing authorization for the German Red Cross). An estimated over 300,000 units of Intercept platelets have been transfused to date.

Cerus Corporation is a biomedical products company focused on commercializing the Intercept Blood System to enhance blood safety.

Cerus currently markets and sells the Intercept Blood System for both platelets and plasma in Europe, Russia, the Middle East and selected countries in other regions around the world. The Intercept red blood cell system is in clinical development.

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