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In a recently published paper development of a sensitive automated “on-line” solid-phase extraction (SPE)/RP-HPLC assay for 6β-hydroxytestosterone (6β-OHT) with corticosterone as the internal standard (IS) was reported and its potential for quantification of various testosterone metabolites in culture media reflecting metabolic activity of cultured human and animal hepatocytes demonstrated [1]. In...
Freshly isolated human hepatocytes are considered as the gold standard for in vitro testing of drug candidates. Meanwhile also cryopreserved human hepatocyte suspensions are available. However, a drawback of these cells is the incalculability of attachment to the culture dish. Therefore, we established a technique freezing hepatocytes cultured on a collagen gel. After thawing damaged cells were removed...
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