Preclinical pharmacokinetic and toxicology assessment of red blood cells prepared with S-303 pathogen inactivation treatment.

Abstract:

BACKGROUND:A system has been developed to inactivate a wide spectrum of blood-borne pathogens in red blood cells (RBCs) before transfusion. The system utilizes S-303 to target nucleic acids of pathogens and white blood cells. The safety of pathogen inactivated RBC was assessed using S-303-treated RBCs (S-303 RBCs) and S-300, the primary degradation product of S-303. STUDY DESIGN AND METHODS:As part of a preclinical safety evaluation program, intravenous toxicity, safety pharmacology, toxicokinetic, and pharmacokinetic studies were conducted in rats and dogs with S-303 RBCs and S-300. RESULTS:Single and repeated transfusions of S-303 RBCs were well tolerated in rats and dogs at S-303 concentrations up to five times higher than that used to prepare RBCs for clinical use. For S-300, the doses ranged from the lowest level representative of a clinical exposure from transfusion of 1 unit (0.052 mg/kg/day) to up to the amount of S-300 that would result from exposure to more than 1900 units of RBCs (100 mg/kg/day). There were no related effects of S-303 RBCs or S-300 on mortality, clinical status, body weight, or clinical laboratory assessments and no evidence of organ toxicity. S-300 did not accumulate in the plasma of rats and dogs after repeated transfusions. For all the studies, plasma S-303 was consistently below the limit of quantitation. CONCLUSION:The level of residual S-303 and S-300 in the treated blood component is well below that at which no adverse effects were observed. These results support further clinical development of S-303 RBCs for prevention of transfusion-transmitted infections.

journal_name

Transfusion

journal_title

Transfusion

authors

North A,Ciaravino V,Mufti N,Corash L

doi

10.1111/j.1537-2995.2011.03132.x

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

2208-18

issue

10

eissn

0041-1132

issn

1537-2995

journal_volume

51

pub_type

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