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Cryopreservation of Sheep Red Blood Cells
Beskyttelse av røde saueblodlegemer ved frysing. 2. Virkning av renset polyvinylpyrrolidone og hydrolysert stivelse
2. Purified Polyvinylpyrrolidone and Hydro-Lyzed Starch as Protective Agents
Acta Veterinaria Scandinavica volume 20, pages 531–536 (1979)
Abstract
The protection of sheep erythrocytes against damage at low temperature (−196°C) was investigated using purified polyvinylpyrrolidone (PVP) and hydrolyzed starch as cryoprotective agents. Identical results were obtained with untreated PVP, neutralized PVP and PVP purified by chromatography. With hydrolyzed starch the cryoprotection was dependent on the type and concentration of the starch used and on the extent of hydrolysis of the starch prior to use. Cell recovery with some starch types was the same (80–85 %) as that obtained with PVP.
Sammendrag
Bevaring av røde saueblodlegemer mot skade etter nedfrysing til −196° C ble undersøkt. Som kryoprotektive midler ble brukt renset, nøytralisert og ubehandlet polyvinylpyrrolidone (PVP) og hydrolysert stivelse. God cellegjenvinning ble oppnådd med PVP uavhengig av om denne var renset ved gelfiltrering, om den var nøytralisert eller ubehandlet.
Etter nedfrysing med stivelse var resultatet avhengig av stivelsetype, -konsentrasjon og -hydrolysegrad. Den høyeste gjenvinning med hydrolysert stivelse var 80–85 % og lik den høyeste gjenvinning med PVP.
References
Ashwood-Smith, M. J. & C. Warby: Studies on the molecular weight and cryoprotective properties of polyvinylpyrrolidone and dextran with bacteria and erythrocytes. Cryobiology 1971, 8, 453–464.
Myhrvold, V.: Cryopreservation of sheep red blood cells. 1. Experiments with polyvinylpyrrolidone and other protective agents. Acta vet. scand. 1979a, 20, 525–530.
Myhrvold, V.: Cryopreservation of sheep red blood cells. 3. Complement titrations with frozen sensitized cells. Acta vet. scand. 1979b, 20, 537–545.
Robson, D. C.: Rapid freezing and thawing techniques using extracellular agents. In Modern Problems of Blood Preservation. Ed. by Spielmann & Seidl. Gustav Fischer Verlag, Jena 1970, p. 204–208.
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Myhrvold, V. Cryopreservation of Sheep Red Blood Cells. Acta Vet Scand 20, 531–536 (1979). https://doi.org/10.1186/BF03546580
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DOI: https://doi.org/10.1186/BF03546580