title: [In vivo experiments, in vitro assays in experimental oncology: establishment of LA 795 Vv-Vt].
abstract: In vivo experiment, in vitro assays (in vivo-in vitro system) is a kind of experimental technique which is different from both in vitro cell line and tumor line. The new model can be grown and studied either as an animal tumor or a cell culture. The specimen could be assayed for cell survival in vitro. This model can be used to study the response of malignant cells to the treatment in a precision and depth that is impossible in tumors grown in vivo. LA 795 Vv-Vt is the first in vivo-in vitro system developed in China. It was established with lung adenocarcinoma of T-739 mouse. The tumor cells could grow freely both in vivo and in vitro with a plating efficiency of 20%. Characteristics of LA 795 Vv-Vt tumor and cell in culture were described and compared. In order to estimate the radiation response of different doses, cell survival curves of tumors irradiated under oxic and hypoxic conditions were drawn and compared. The oxygen enhance ratio was 2.98. The experiments indicate that in vivo-in vitro system has a good dependent relation in dose and effect and is worth extensive application.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000818:Animals; D002460:Cell Line; D003114:Colony-Forming Units Assay; D008175:Lung Neoplasms / Q000473:pathology*; D051379:Mice; D014410:Tumor Stem Cell Assay