Leaf Extract from European Olive (Olea europaea L.) Post-Transcriptionally Suppresses the Epithelial-Mesenchymal Transition and Sensitizes Gastric Cancer Cells to Chemotherapy

The overall survival of patients with the advanced and recurrent gastric cancer (GC) remains unfavorable. In particular, this is due to cancer spreading and resistance to chemotherapy associated with the epithelial-mesenchymal transition (EMT) of tumor cells. EMT can be identified by the transcripto...

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Veröffentlicht in:Biochemistry (Moscow) 2024, Vol.89 (1), p.97-115
Hauptverfasser: Tekin, Cagla, Ercelik, Melis, Dunaev, Pavel, Galembikova, Aigul, Tezcan, Gulcin, Aksoy, Secil Ak, Budak, Ferah, Isık, Ozgen, Ugras, Nesrin, Boichuk, Sergei, Tunca, Berrin
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container_issue 1
container_start_page 97
container_title Biochemistry (Moscow)
container_volume 89
creator Tekin, Cagla
Ercelik, Melis
Dunaev, Pavel
Galembikova, Aigul
Tezcan, Gulcin
Aksoy, Secil Ak
Budak, Ferah
Isık, Ozgen
Ugras, Nesrin
Boichuk, Sergei
Tunca, Berrin
description The overall survival of patients with the advanced and recurrent gastric cancer (GC) remains unfavorable. In particular, this is due to cancer spreading and resistance to chemotherapy associated with the epithelial-mesenchymal transition (EMT) of tumor cells. EMT can be identified by the transcriptome profiling of GC for EMT markers. Indeed, analysis of the TCGA and GTEx databases ( n  = 408) and a cohort of GC patients ( n  = 43) revealed that expression of the CDH2 gene was significantly decreased in the tumors vs. non-tumor tissues and correlated with the overall survival of GC patients. Expression of the EMT-promoting transcription factors SNAIL and ZEB1 was significantly increased in GC. These data suggest that targeting the EMT might be an attractive therapeutic approach for patients with GC. Previously, we demonstrated a potent anti-cancer activity of the olive leaf extract (OLE). However, its effect on the EMT regulation in GC remained unknown. Here, we showed that OLE efficiently potentiated the inhibitory effect of the chemotherapeutic agents 5-fluorouracil (5-FU) and cisplatin (Cis) on the EMT and their pro-apoptotic activity, as was demonstrated by changes in the expression of the EMT markers (E- and N-cadherins, vimentin, claudin-1) in GC cells treated with the aforementioned chemotherapeutic agents in the presence of OLE. Thus, culturing GC cells with 5-FU + OLE or Cis + OLE attenuated the invasive properties of cancer cells. Importantly, upregulation of expression of the apoptotic markers (PARP cleaved form) and increase in the number of cells undergoing apoptosis (annexin V-positive) were observed for GC cells treated with a combination of OLE and 5-FU or Cis. Collectively, our data illustrate that OLE efficiently interferes with the EMT in GC cells and potentiates the pro-apoptotic activity of certain chemotherapeutic agents used for GC therapy.
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Indeed, analysis of the TCGA and GTEx databases ( n  = 408) and a cohort of GC patients ( n  = 43) revealed that expression of the CDH2 gene was significantly decreased in the tumors vs. non-tumor tissues and correlated with the overall survival of GC patients. Expression of the EMT-promoting transcription factors SNAIL and ZEB1 was significantly increased in GC. These data suggest that targeting the EMT might be an attractive therapeutic approach for patients with GC. Previously, we demonstrated a potent anti-cancer activity of the olive leaf extract (OLE). However, its effect on the EMT regulation in GC remained unknown. Here, we showed that OLE efficiently potentiated the inhibitory effect of the chemotherapeutic agents 5-fluorouracil (5-FU) and cisplatin (Cis) on the EMT and their pro-apoptotic activity, as was demonstrated by changes in the expression of the EMT markers (E- and N-cadherins, vimentin, claudin-1) in GC cells treated with the aforementioned chemotherapeutic agents in the presence of OLE. Thus, culturing GC cells with 5-FU + OLE or Cis + OLE attenuated the invasive properties of cancer cells. Importantly, upregulation of expression of the apoptotic markers (PARP cleaved form) and increase in the number of cells undergoing apoptosis (annexin V-positive) were observed for GC cells treated with a combination of OLE and 5-FU or Cis. 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Post-Transcriptionally Suppresses the Epithelial-Mesenchymal Transition and Sensitizes Gastric Cancer Cells to Chemotherapy</title><title>Biochemistry (Moscow)</title><addtitle>Biochemistry Moscow</addtitle><addtitle>Biochemistry (Mosc)</addtitle><description>The overall survival of patients with the advanced and recurrent gastric cancer (GC) remains unfavorable. In particular, this is due to cancer spreading and resistance to chemotherapy associated with the epithelial-mesenchymal transition (EMT) of tumor cells. EMT can be identified by the transcriptome profiling of GC for EMT markers. Indeed, analysis of the TCGA and GTEx databases ( n  = 408) and a cohort of GC patients ( n  = 43) revealed that expression of the CDH2 gene was significantly decreased in the tumors vs. non-tumor tissues and correlated with the overall survival of GC patients. Expression of the EMT-promoting transcription factors SNAIL and ZEB1 was significantly increased in GC. 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Importantly, upregulation of expression of the apoptotic markers (PARP cleaved form) and increase in the number of cells undergoing apoptosis (annexin V-positive) were observed for GC cells treated with a combination of OLE and 5-FU or Cis. 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Indeed, analysis of the TCGA and GTEx databases ( n  = 408) and a cohort of GC patients ( n  = 43) revealed that expression of the CDH2 gene was significantly decreased in the tumors vs. non-tumor tissues and correlated with the overall survival of GC patients. Expression of the EMT-promoting transcription factors SNAIL and ZEB1 was significantly increased in GC. These data suggest that targeting the EMT might be an attractive therapeutic approach for patients with GC. Previously, we demonstrated a potent anti-cancer activity of the olive leaf extract (OLE). However, its effect on the EMT regulation in GC remained unknown. Here, we showed that OLE efficiently potentiated the inhibitory effect of the chemotherapeutic agents 5-fluorouracil (5-FU) and cisplatin (Cis) on the EMT and their pro-apoptotic activity, as was demonstrated by changes in the expression of the EMT markers (E- and N-cadherins, vimentin, claudin-1) in GC cells treated with the aforementioned chemotherapeutic agents in the presence of OLE. Thus, culturing GC cells with 5-FU + OLE or Cis + OLE attenuated the invasive properties of cancer cells. Importantly, upregulation of expression of the apoptotic markers (PARP cleaved form) and increase in the number of cells undergoing apoptosis (annexin V-positive) were observed for GC cells treated with a combination of OLE and 5-FU or Cis. Collectively, our data illustrate that OLE efficiently interferes with the EMT in GC cells and potentiates the pro-apoptotic activity of certain chemotherapeutic agents used for GC therapy.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><pmid>38467548</pmid><doi>10.1134/S0006297924010061</doi><tpages>19</tpages></addata></record>
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subjects 5-Fluorouracil
Annexin V
Anticancer properties
Antineoplastic drugs
Antitumor activity
Apoptosis
Biochemistry
Biomedical and Life Sciences
Biomedicine
Bioorganic Chemistry
Cadherins
Cadherins - metabolism
Cancer therapies
Cell Line, Tumor
Cell Movement
Chemotherapy
Cisplatin
Cisplatin - pharmacology
Epithelial-Mesenchymal Transition
Fluorouracil - pharmacology
Gastric cancer
Gene expression
Gene Expression Regulation, Neoplastic
Herbal medicine
Humans
Invasiveness
Leaves
Life Sciences
Microbiology
Olea - metabolism
Plant extracts
Plant Extracts - pharmacology
Post-transcription
Snail protein
Stomach Neoplasms - drug therapy
Stomach Neoplasms - genetics
Stomach Neoplasms - metabolism
Survival
Survival analysis
Transcription factors
Transcriptomes
Tumor cells
Tumors
Vimentin
title Leaf Extract from European Olive (Olea europaea L.) Post-Transcriptionally Suppresses the Epithelial-Mesenchymal Transition and Sensitizes Gastric Cancer Cells to Chemotherapy
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