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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

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

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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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