[Development of a method of obtaining lyophilized antileukocyte histotyping sera intended for long-term storage]. / Razrabotka metoda polucheniia sukhikh antileikotsitarnykh gistotipiruiushchikh syvorotok s tsel'iu ikh dolgosrochnogo khraneniia.

An optimal scheme for sublimation of anti-HLA-sera of locuses A, B, C, and DR has been developed, consisting of freezing at 60 degrees C and lyophilization to 29-30 degrees C, this permitting the preparation of initially active antileukocytic sera. The activity and specificity of defrosted native and lyophilized anti-HLA-sera were assessed in the complement-dependent cytotoxicity test. Four-year follow-up of the activity of dried anti-HLA-sera showed that the stabilizer was not needed, for the activities of the sera lyophilized with and without it was virtually equally high. The optimal storage temperature for dry anti-HLA-sera is 4 degrees C.

Photodynamic inactivation of enveloped virus in protein plasma preparations by solid-phase fullerene-based photosensitizer.

BACKGROUND: The problem of transfusion-transmitted infections still remains serious and actual for health care despite the detailed testing of donors. Human immunodeficiency virus, hepatitis B and C viruses and human cytomegalovirus are among the most dangerous pathogens that can be transmitted with blood. Previously, a composition consisting of fullerene layer applied on silica gel particles was shown to inactivate influenza virus up to complete loss of infectivity. METHODS: In the present study the unit has been developed with source of irradiation whose spectrum is appropriate for solid-phase fullerene. The ability of the unit to inactivate the enveloped influenza virus in protein fraction of donor blood has been studied. RESULTS: It was shown that at optimized conditions complete inactivation of enveloped virus of extremely high initial titer (7.0-9.5 log 10 EID 50/0.2 mL) in the solution of albumin was achieved after as short time as 30 min of irradiation. This process did not affect the oxidative metabolism of neutrophils and membranes of erythrocytes evaluated by NBT reduction test and morphological analysis of erythrocytes, respectively. CONCLUSION: The data obtained suggests that the method described can be recommended for further development and optimization of the procedure of inactivation of viruses in the preparations of the plasma of donor blood.