“…1A), suggesting the validity of this model. To reveal the trophic effect of DBT, a standardized herbal extract of DBT, or RA alone, or RAS alone, was used: the preparation and quality control of this decoction were given previously Gao et al, 2008;Choi et al, 2009). In cultured HEK293T cells, DBT, RA alone, RAS alone, or RA + RAS (just boiling RA and RAS separately and then mixing the extracts together) was applied onto the cultures for 2 days.…”