Micro RNA-373 is Down-regulated in Pancreatic Cancer and Inhibits Cancer Cell Invasion

Kohei Nakata, Kenoki Ohuchida, Kazuhiro Mizumoto, Shinichi Aishima, Yoshinao Oda, Eishi Nagai, Masao Tanaka

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Background: Micro RNAs (miRNAs) are small noncoding RNAs that have gained attention as key molecules in the malignant characteristics of cancers, and several recent investigations also have identified some miRNAs as potential key regulators to inhibit the malignant characteristics of tumors. MiRNA-373 (miR-373) has recently been reported to induce E-cadherin, which is a key regulator of epithelial-mesenchymal transition (EMT). However, the role of miR-373 in the characteristics of cancer cells is not still well known.

Methods: We investigated the expression levels of miR-373 in pancreatic cancer cell lines and its effect on the invasiveness of pancreatic cancer by using in vitro and in vivo models. We also analyzed the expression of miR-373 using formalin-fixed paraffin-embedded (n = 152) and microdissected frozen (n = 57) samples from pancreatic tissues.

Results: The levels of miR-373 expression were low in pancreatic cancer cell lines. In formalin-fixed paraffin-embedded and microdissected frozen samples, miR-373 expression was significantly down-regulated in pancreatic cancer compared with that in healthy pancreas (P < 0.001 and P = 0.005, respectively). We also found that reexpression of miR-373 repressed transforming growth factor-β–induced EMT, leading to inhibition of invasiveness of cancer cells. Furthermore, reexpression of miR-373 significantly inhibited peritoneal dissemination in vivo (P < 0.001).

Conclusions: MiR-373 is down-regulated in pancreatic cancer, and its reexpression represses the invasiveness of pancreatic cancer cells.

Original languageEnglish
Pages (from-to)564-574
Number of pages11
JournalAnnals of Surgical Oncology
Volume21
Issue number4
DOIs
Publication statusPublished - Jan 1 2014

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MicroRNAs
Pancreatic Neoplasms
Neoplasms
Epithelial-Mesenchymal Transition
Paraffin
Formaldehyde
Cell Line
Small Untranslated RNA
Transforming Growth Factors
Cadherins
Pancreas

All Science Journal Classification (ASJC) codes

  • Surgery
  • Oncology

Cite this

Micro RNA-373 is Down-regulated in Pancreatic Cancer and Inhibits Cancer Cell Invasion. / Nakata, Kohei; Ohuchida, Kenoki; Mizumoto, Kazuhiro; Aishima, Shinichi; Oda, Yoshinao; Nagai, Eishi; Tanaka, Masao.

In: Annals of Surgical Oncology, Vol. 21, No. 4, 01.01.2014, p. 564-574.

Research output: Contribution to journalArticle

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abstract = "Background: Micro RNAs (miRNAs) are small noncoding RNAs that have gained attention as key molecules in the malignant characteristics of cancers, and several recent investigations also have identified some miRNAs as potential key regulators to inhibit the malignant characteristics of tumors. MiRNA-373 (miR-373) has recently been reported to induce E-cadherin, which is a key regulator of epithelial-mesenchymal transition (EMT). However, the role of miR-373 in the characteristics of cancer cells is not still well known.Methods: We investigated the expression levels of miR-373 in pancreatic cancer cell lines and its effect on the invasiveness of pancreatic cancer by using in vitro and in vivo models. We also analyzed the expression of miR-373 using formalin-fixed paraffin-embedded (n = 152) and microdissected frozen (n = 57) samples from pancreatic tissues.Results: The levels of miR-373 expression were low in pancreatic cancer cell lines. In formalin-fixed paraffin-embedded and microdissected frozen samples, miR-373 expression was significantly down-regulated in pancreatic cancer compared with that in healthy pancreas (P < 0.001 and P = 0.005, respectively). We also found that reexpression of miR-373 repressed transforming growth factor-β–induced EMT, leading to inhibition of invasiveness of cancer cells. Furthermore, reexpression of miR-373 significantly inhibited peritoneal dissemination in vivo (P < 0.001).Conclusions: MiR-373 is down-regulated in pancreatic cancer, and its reexpression represses the invasiveness of pancreatic cancer cells.",
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N2 - Background: Micro RNAs (miRNAs) are small noncoding RNAs that have gained attention as key molecules in the malignant characteristics of cancers, and several recent investigations also have identified some miRNAs as potential key regulators to inhibit the malignant characteristics of tumors. MiRNA-373 (miR-373) has recently been reported to induce E-cadherin, which is a key regulator of epithelial-mesenchymal transition (EMT). However, the role of miR-373 in the characteristics of cancer cells is not still well known.Methods: We investigated the expression levels of miR-373 in pancreatic cancer cell lines and its effect on the invasiveness of pancreatic cancer by using in vitro and in vivo models. We also analyzed the expression of miR-373 using formalin-fixed paraffin-embedded (n = 152) and microdissected frozen (n = 57) samples from pancreatic tissues.Results: The levels of miR-373 expression were low in pancreatic cancer cell lines. In formalin-fixed paraffin-embedded and microdissected frozen samples, miR-373 expression was significantly down-regulated in pancreatic cancer compared with that in healthy pancreas (P < 0.001 and P = 0.005, respectively). We also found that reexpression of miR-373 repressed transforming growth factor-β–induced EMT, leading to inhibition of invasiveness of cancer cells. Furthermore, reexpression of miR-373 significantly inhibited peritoneal dissemination in vivo (P < 0.001).Conclusions: MiR-373 is down-regulated in pancreatic cancer, and its reexpression represses the invasiveness of pancreatic cancer cells.

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