Development of a freeze-drying protocol for the long-term storage of S9-fraction at ambient temperatures.

Abstract:

:The purpose of this study was to investigate the long-term stabilization of the liver S9-fraction that is widely used in genotoxicity assays in order to mimic bio-activating processes of xenobiotics in vitro. A successful long-term stabilization of the S9-fraction meets the growing demand for the construction of a lab independent device for the detection of genotoxic compounds in field studies with an integrated module for the metabolic activation of pre-genotoxic compounds. The carbohydrates sucrose, trehalose and raffinose were tested in different concentrations or mixtures in order to increase the product stability of the S9-fraction during and after freeze-drying. The activity of the freeze-dried S9-samples was evaluated by means of their potential to activate pre-genotoxic compounds. The successful long-term stabilization of enzymes of the rodent liver S9-fraction for 6 weeks at room temperature by freeze-drying in the presence of 250 mM trehalose is presented.

journal_name

Cryobiology

journal_title

Cryobiology

authors

Buchinger S,Campen E,Helmers E,Morosow V,Krefft M,Reifferscheid G

doi

10.1016/j.cryobiol.2008.11.007

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

139-44

issue

2

eissn

0011-2240

issn

1090-2392

pii

S0011-2240(08)00305-2

journal_volume

58

pub_type

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