RESUMO
@# Objective To explore the optimal experiment conditions of CCK-8 and MTS for cell proliferation assays in human amniotic epithelial cells and to evaluate the cytotoxicity of these reagents. Methods Human amniotic epithelial cells (hAECs) in logarithm growth stages were prepared in different cell concentrations with DMEM/F12 and 10% FBS. The sensitivity and optimal wavelengths was determined based on the optical density (OD) measured at 450 nm and 492 nm. The optimal time was determined under the conditions of the same cell concentration and defined OD values. HAECs were treated with DMSO, CCK-8 and MTS for 1 h, 2 h, 3 h, and 4 h, respectively. 24 h later, cytotoxicity of the CCK-8 and MTS was evaluated by determination of cell proliferation and Trypan Blue staining. Results The optimal detection wavelength was 450 nm for CCK-8, and 492 nm for MTS. The sensitivity of CCK-8 was slightly lower then that of MTS. The optimal time for incubation hAECs with CCK-8 was 4 h within 1~4 h. The inhibitory on cell proliferation and cytotoxicity of CCK-8 were weaker then those of MTS. Conclusion CCK-8 is a convenient reagent with low cytotoxicity for detection of the proliferation of hAECs.
RESUMO
Objective To identify the framework of Beijing midwives' core competency.Methods A semi-structure interview was developed by using the framework of the International Confederation of Midwives (ICM)as a guideline,questionnaires were distributed to 14 Beijing midwife professionals.Content template analysis was conducted and the template was based on the ICM's framework.Results Five critical components were identified as representing midwives' core competency.Condusions The critical components for constructing Beijing midwives' core competency are some what similar to the ICM's framework,and the different components were health care before pregnancy and competence of community health care.