Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: Origanum majorana ethanolic extract inhibits cellular viability of colorectal cancer cells. (A) Exponentially growing HT-29 and (B) Caco-2 colon cancer cells were treated with and without of various concentration (0, 150, 300, 450, and 600 μg/mL) OME for 24 and 48 h. Viability was measured using a colorimetric assay as described in section Materials and Methods. Values are represented as mean ± SD of n = 4 (* p < 0.05 and *** p < 0.001). (C) HT-29 cells were exposed to OME for 24 and 48 h and number of viable cells, using a fluorescent dye, was monitored as described in section Materials and Methods using the Muse Cell Analyzer (Millipore). Data represent the mean ± SD of n = 3 carried out in triplicate.

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Concentration Assay, Colorimetric Assay

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: Origanum majorana inhibits HT-29 colony growth. (A–C) Inhibition of formed HT-29 colony growth by various concentrations of OME (0, 150, 300, 450, and 600 μg/mL) was assessed by measuring the number and average size (surface area) of the colonies obtained in control and OME-treated plate as described in section Materials and methods. Values are represented as mean ± SD of n = 3 (* p < 0.05 and ** p < 0.005).

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Inhibition, Control

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: OME induces a mitotic arrest in HT-29 cells. (A,B) Cell cycle distribution analysis in HT-29 cells treated with and without OME (0, 150, 300, 450, and 600 μg/mL) for 24 h. Values are represented as mean ± SD of n = 3 (* p < 0.05, ** p < 0.005, and *** p < 0.001). (C) Alteration in proteins associated with cell cycle regulation in OME-treated HT-29 cells.

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques:

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: Activation of extrinsic apoptotic pathway and upregulation of TNF-α in OME-treated HT-29 cells. (A) Western blot analysis of caspase 3, 7, and 8 activation and PARP cleavage in HT-29 cells. Cells were treated with or without increasing concentration (0, 150, 300, 450, and 600 μg/mL) of OME for 48 h, then whole cell proteins were extracted and subjected to Western blot analysis for the markers of apoptosis (B) Western blot analysis of TNF-α (C) Western blot analysis of cleaved PARP in cells pretreated for 1 h with and without Z-VAD-FMK (50 μM) followed by treatment with OME (450 μg/mL) for 48 h. (D) Inhibition of apoptosis has a minimal effect of OME-induced cell death. HT-29 cells were pretreated with Z-VAD-FMK as described above and then treated for 48 h with 450 μg/mL OME. Cell viability was determined as described in section Material and Methods. Values are represented as mean ± SD of n = 3 (* p < 0.05 and *** p < 0.001).

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Activation Assay, Western Blot, Concentration Assay, Inhibition

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: OME induces abortive autophagy in HT-29 cells. Western blotting analysis of LC3II, p62(SQSTM1), and Beclin-1 expression OME-treated HT-29 cells. Cells were treated with or without increasing concentration (0, 150, 300, 450, and 600 μg/mL) of OME for 48 h, then whole cell proteins were extracted and subjected to Western blot analysis, as described in section Materials and Methods, for LC3II, 62(SQSTM1), and Beclin-1.

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Western Blot, Expressing, Concentration Assay

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: OME induces DNA damage in response to OME treatment in HT-29 cells. HT-29 cells were treated with increasing concentrations (0, 150, 300, 450, and 600 μg/mL) of OME for 48 h. DNA damage was examined by western blotting by measuring the level of phosphorylated H2AX.

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Western Blot

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: DNA damage and autophagy precedes apoptosis in OME-treated HT-29 cells. (A) Time-course analysis, by Western blotting, of PARP and caspase 8 cleavage, LC3-II, p62 (SQSTM1), γH2AX, and H3pser10 accumulation in OME-treated HT-29 cells. Cells were treated with 450 μg/mL OME and proteins were extracted at the indicated time-points (0, 4, 8, 24, and 48 h) as described in section Materials and Methods. (B) Western blot analysis of γH2AX accumulation in HT-29 cells pre-treated with 3MA. Cells were pretreated with or without 3-MA (5 mM) for 1 h and then OME (450 μg/mL) was added, and cells were incubated for 48 h.

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Western Blot, Incubation

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: Inhibition of autophagy decreases OME-induced cell death in HT-29 cells. (A) Analysis of LC3-II and cleaved PARP accumulation in HT-29 cells pre-treated with 3-MA. Cells were pretreated with or without 3-MA (5 mM) for 1 h and then OME (450 μg/mL) was added, and cells were incubated for 48 h. (B) Inhibition of autophagy reduces cell death induced by OME. HT-29 cells were pretreated with 3-MA for 1 h and then for 48 h with 450 μg/mL OME. Cell viability was determined as described in Material and Methods. Values are represented as mean ± SD of n = 3 (*** p < 0.001).

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Inhibition, Incubation

Journal: Frontiers in Oncology

Article Title: Origanum majorana Ethanolic Extract Promotes Colorectal Cancer Cell Death by Triggering Abortive Autophagy and Activation of the Extrinsic Apoptotic Pathway

doi: 10.3389/fonc.2019.00795

Figure Lengend Snippet: Downregulation of survivin by OME in HT-29 cells. HT-29 cells were treated with increasing concentrations (0, 150, 300, 450, and 600 μg/mL) of OME for 48 h and the level of survivin was assessed by Western blotting.

Article Snippet: Human colon cancer cells HT-29 (Cat# 300215) and CaCo-2 (Cat # 300137) were purchased from CLS (cell lines service, Germany).

Techniques: Western Blot