Journal: Cancers
Article Title: MSC.sTRAIL Has Better Efficacy than MSC.FL-TRAIL and in Combination with AKTi Blocks Pro-Metastatic Cytokine Production in Prostate Cancer Cells
doi: 10.3390/cancers11040568
Figure Lengend Snippet: MSC.sTRAIL induces higher apoptosis levels in colorectal cancer cells than MSC.FL-TRAIL. ( a ) Murine MSCs (mMSCs) were transduced with a control adenoviral vector (ctrl), a vector expressing FL-TRAIL (FL) or a vector expressing sTRAIL (sT). The resulting medium supernatants were either taken as crude supernatants (c), centrifuged (s) or filtered through a 0.45 μm filter (f) before TRAIL levels were measured by ELISA. ( b ) Human MSCs (hMSCs) were transduced with a control adenoviral vector (ctrl), a vector expressing FL-TRAIL (FL) or a vector expressing sTRAIL (sT). The resulting medium supernatants were either taken as crude supernatants (c), centrifuged (s) or filtered through a 0.45 μm filter (f) before TRAIL levels were measured by ELISA. ( c ) Different types of MSCs (adipose tissue-derived - AT, bone marrow-derived - BM, and umbilical cord-derived - UC) were transduced with a control adenoviral vector (ctrl), a vector expressing FL-TRAIL (FL) or a vector expressing sTRAIL (sT). The resulting medium supernatants were passed through a 0.45 μm filter before TRAIL levels were measured by ELISA. ( d ) Apoptosis was measured in different types of MSCs, adipose tissue-derived (AT), bone marrow-derived (BM) and umbilical cord-derived (UC) and mouse (mMSC) MSCs that were transduced with a control adenoviral vector (ctrl), a vector expressing FL-TRAIL (FL) or a vector expressing sTRAIL (sT). ( e ) Survival was measured in HT-29 cells after exposure to supernatants from MSC.FL-TRAIL (red) and MSC.sTRAIL (yellow) at increasing concentrations of sTRAIL. For MSC.FL-TRAIL supernatants equal volumes of supernatant were used for each corresponding sTRAIL concentration. ( f ) Apoptosis was measured in HT-29 cells after exposure to supernatants from MSC.FL-TRAIL (red) and MSC.sTRAIL (yellow) at increasing concentrations of sTRAIL. For MSC.FL-TRAIL supernatants equal volumes of supernatant were used for each corresponding sTRAIL concentration. ( g ) Survival was measured in HT-29 cells that were co-cultured with control MSCs (ctrl), MSC.FL-TRAIL (FL) or MSC.sTRAIL (sT) in 24-well plates fitted with transwell tissue culture inserts. ( h ) Apoptosis was measured at 24 h and 72 h in HT-29 cells. For this HT-29 cells were co-cultured with control MSCs (ctrl), MSC.FL-TRAIL (FL) or MSC.sTRAIL (sT) in 24-well plates fitted with transwell tissue culture inserts. ( i ) Morphologically altered cells were measured by flow cytometry (changes in FSC/SSC) after mixing HT-29 cells with control MSCs (ctrl), MSC.FL-TRAIL (FL) or MSC.sTRAIL (sT) at a ratio of 10:1. ( j ) Apoptosis measurements of HT-29 cells mixed with control MSCs (ctrl), MSC.FL-TRAIL (FL) or MSC.sTRAIL (sT) at a ratio of 10:1. ( k ) Apoptosis measurements of Colo205 cells mixed with control MSCs (ctrl), MSC.FL-TRAIL (FL) or MSC.sTRAIL (sT) at different ratios (5:1; 10:1; 100:1). Representative images of Colo205 cells mixed with control MSCs (ctrl), MSC.FL-TRAIL (FL) or MSC.sTRAIL (sT) are shown on the right side of the panel. MSCs are pointed out by blue arrows, apoptotic cells by red arrows. Scale bar is 30 μm. Values represent mean ± SE.
Article Snippet: Human bone marrow derived MSCs were from Lonza, human adipose derived stem cells were from Amsbio (Cambridge, MA, USA) and human umbilical cord derived MSCs were from Promocell (Heidelberg, Germany).
Techniques: Transduction, Control, Plasmid Preparation, Expressing, Enzyme-linked Immunosorbent Assay, Derivative Assay, Concentration Assay, Cell Culture, Flow Cytometry