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The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer
SIMPLE SUMMARY: Previous investigations described bioinformatic analyses based on the mRNA expression and somatic mutation as useful strategies for identifying cancer-associated molecules that were potential candidates of therapeutic targets. However, these data included secondary changes and non-fu...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269357/ https://www.ncbi.nlm.nih.gov/pubmed/34202873 http://dx.doi.org/10.3390/cancers13133165 |
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author | Konishi, Hiroaki Kashima, Shin Goto, Takuma Ando, Katsuyoshi Sakatani, Aki Tanaka, Hiroki Ueno, Nobuhiro Moriichi, Kentaro Okumura, Toshikatsu Fujiya, Mikihiro |
author_facet | Konishi, Hiroaki Kashima, Shin Goto, Takuma Ando, Katsuyoshi Sakatani, Aki Tanaka, Hiroki Ueno, Nobuhiro Moriichi, Kentaro Okumura, Toshikatsu Fujiya, Mikihiro |
author_sort | Konishi, Hiroaki |
collection | PubMed |
description | SIMPLE SUMMARY: Previous investigations described bioinformatic analyses based on the mRNA expression and somatic mutation as useful strategies for identifying cancer-associated molecules that were potential candidates of therapeutic targets. However, these data included secondary changes and non-functional alterations that do not influence tumor progression. Investigations, including our own studies, have shown that some RBPs shuttle cytoplasm and nuclei, and their affinity to RNAs is regulated by posttranslational modifications, such as phosphorylation. Therefore, the functional assessment of individual molecules is the most suitable strategy for identifying cancer-associated genes with or without expressional changes and mutations. This report showed for the first time that a functional assessment using an siRNA library was useful for identifying therapeutic targets from molecular groups, including RBPs, that had not been identified by expressional and mutational analyses. ABSTRACT: Previous investigations have indicated that RNA-binding proteins (RBPs) are key molecules for the development of organs, differentiation, cell growth and apoptosis in cancer cells as well as normal cells. A bioinformatics analysis based on the mRNA expression and a somatic mutational database revealed the association between aberrant expression/mutations of RBPs and cancer progression. However, this method failed to detect functional alterations in RBPs without changes in the expression, thus leading to false negatives. To identify major tumor-associated RBPs, we constructed an siRNA library based on the database of RBPs and assessed the influence on the growth of colorectal, pancreatic and esophageal cancer cells. A comprehensive analysis of siRNA functional screening findings using 1198 siRNAs targeting 416 RBPs identified 41 RBPs in which 50% inhibition of cell growth was observed in cancer cells. Among these RBPs, 12 showed no change in the mRNA expression and no growth suppression in non-cancerous cells when downregulated by specific siRNAs. We herein report for the first time cancer-promotive RBPs identified by a novel functional assessment using an siRNA library of RBPs combined with expressional and mutational analyses. |
format | Online Article Text |
id | pubmed-8269357 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-82693572021-07-10 The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer Konishi, Hiroaki Kashima, Shin Goto, Takuma Ando, Katsuyoshi Sakatani, Aki Tanaka, Hiroki Ueno, Nobuhiro Moriichi, Kentaro Okumura, Toshikatsu Fujiya, Mikihiro Cancers (Basel) Article SIMPLE SUMMARY: Previous investigations described bioinformatic analyses based on the mRNA expression and somatic mutation as useful strategies for identifying cancer-associated molecules that were potential candidates of therapeutic targets. However, these data included secondary changes and non-functional alterations that do not influence tumor progression. Investigations, including our own studies, have shown that some RBPs shuttle cytoplasm and nuclei, and their affinity to RNAs is regulated by posttranslational modifications, such as phosphorylation. Therefore, the functional assessment of individual molecules is the most suitable strategy for identifying cancer-associated genes with or without expressional changes and mutations. This report showed for the first time that a functional assessment using an siRNA library was useful for identifying therapeutic targets from molecular groups, including RBPs, that had not been identified by expressional and mutational analyses. ABSTRACT: Previous investigations have indicated that RNA-binding proteins (RBPs) are key molecules for the development of organs, differentiation, cell growth and apoptosis in cancer cells as well as normal cells. A bioinformatics analysis based on the mRNA expression and a somatic mutational database revealed the association between aberrant expression/mutations of RBPs and cancer progression. However, this method failed to detect functional alterations in RBPs without changes in the expression, thus leading to false negatives. To identify major tumor-associated RBPs, we constructed an siRNA library based on the database of RBPs and assessed the influence on the growth of colorectal, pancreatic and esophageal cancer cells. A comprehensive analysis of siRNA functional screening findings using 1198 siRNAs targeting 416 RBPs identified 41 RBPs in which 50% inhibition of cell growth was observed in cancer cells. Among these RBPs, 12 showed no change in the mRNA expression and no growth suppression in non-cancerous cells when downregulated by specific siRNAs. We herein report for the first time cancer-promotive RBPs identified by a novel functional assessment using an siRNA library of RBPs combined with expressional and mutational analyses. MDPI 2021-06-24 /pmc/articles/PMC8269357/ /pubmed/34202873 http://dx.doi.org/10.3390/cancers13133165 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Konishi, Hiroaki Kashima, Shin Goto, Takuma Ando, Katsuyoshi Sakatani, Aki Tanaka, Hiroki Ueno, Nobuhiro Moriichi, Kentaro Okumura, Toshikatsu Fujiya, Mikihiro The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer |
title | The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer |
title_full | The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer |
title_fullStr | The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer |
title_full_unstemmed | The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer |
title_short | The Identification of RNA-Binding Proteins Functionally Associated with Tumor Progression in Gastrointestinal Cancer |
title_sort | identification of rna-binding proteins functionally associated with tumor progression in gastrointestinal cancer |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269357/ https://www.ncbi.nlm.nih.gov/pubmed/34202873 http://dx.doi.org/10.3390/cancers13133165 |
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