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Cheng Z, Wang J, Xu Y, Jiang T, Xue Z, Li S, Zhao Y, Song H, Song J. N7-methylguanosine-related lncRNAs: Distinction between hot and cold tumors and construction of predictive models in colon adenocarcinoma. Front Oncol 2022; 12:951452. [PMID: 36185235 PMCID: PMC9520617 DOI: 10.3389/fonc.2022.951452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/22/2022] [Indexed: 11/13/2022] Open
Abstract
Colon adenocarcinoma (COAD) is a prevalent malignant tumor that severely threatens human health across the globe. Immunotherapy is an essential need for patients with COAD. N7-methylguanosine (m7G) has been associated with human diseases, and non-coding RNAs (lncRNAs) regulate various tumor-related biological processes. Nonetheless, the m7G-related lncRNAs involved in COAD regulation are limited. This study aims to construct the clustering features and prognostic model of m7G-related lncRNAs in COAD. First, The Cancer Genome Atlas (TCGA) database was used to identify m7G-related differentially expressed lncRNAs (DELs), based on which COAD cases could be classified into two subtypes. Subsequently, univariate Cox analysis was used to identify 9 prognostic m7G-related lncRNAs. Further, Five candidates were screened by LASSO-Cox regression to develop new models. The patients were divided into high-risk and low-risk groups based on the median risk score. Consequently, the Kaplan-Meier survival curve demonstrated a statistically significant overall survival (OS) between the high- and low-risk groups (P<0.001). Multivariate Cox regression analysis revealed that risk score is an independent prognostic factor in COAD patients (P<0.001). This confirms the clinical applicability of the model. Additionally, we performed Gene Set Enrichment Analysis (GSEA), which uncovered the biological and functional differences between risk subgroups, i.e., enrichment of immune-related diseases in the high-risk group and enrichment of metabolic-related pathways in the low-risk group. In a drug sensitivity analysis, high-risk group were more sensitive to some chemotherapeutics and targeted drugs than low-risk group. Eventually, the stability of the model was confirmed by qRT-PCR. Our study unraveled the features of different immune states of COAD and established a prognostic model, including five m7G-related lncRNAs for COAD patients. These results will bolster clinical treatment and survival prediction of COAD.
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Affiliation(s)
- Zhichao Cheng
- The Graduate School, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
- Institute of Digestive Diseases, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jiaqi Wang
- Department of General Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Yixin Xu
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Tao Jiang
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Zhenyu Xue
- Institute of Digestive Diseases, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Shuai Li
- Institute of Digestive Diseases, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Ying Zhao
- Institute of Digestive Diseases, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Hu Song
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
- *Correspondence: Jun Song, ; Hu Song,
| | - Jun Song
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
- Institute of Digestive Diseases, Xuzhou Medical University, Xuzhou, Jiangsu, China
- *Correspondence: Jun Song, ; Hu Song,
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Crafa F, Vanella S, Catalano OA, Pomykala KL, Baiamonte M. Role of one-step nucleic acid amplification in colorectal cancer lymph node metastases detection. World J Gastroenterol 2022; 28:4019-4043. [PMID: 36157105 PMCID: PMC9403438 DOI: 10.3748/wjg.v28.i30.4019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 06/03/2022] [Accepted: 07/22/2022] [Indexed: 02/06/2023] Open
Abstract
Current histopathological staging procedures in colorectal cancer (CRC) depend on midline division of the lymph nodes (LNs) with one section of hematoxylin and eosin staining. Cancer cells outside this transection line may be missed, which could lead to understaging of Union for International Cancer Control Stage II high-risk patients. The one-step nucleic acid amplification (OSNA) assay has emerged as a rapid molecular diagnostic tool for LN metastases detection. It is a molecular technique that can analyze the entire LN tissue using a reverse-transcriptase loop-mediated isothermal amplification reaction to detect tumor-specific cytokeratin 19 mRNA. Our findings suggest that the OSNA assay has a high diagnostic accuracy in detecting metastatic LNs in CRC and a high negative predictive value. OSNA is a standardized, observer-independent technique, which may lead to more accurate staging. It has been suggested that in stage II CRC, the upstaging can reach 25% and these patients can access postoperative adjuvant chemotherapy. Moreover, intraoperative OSNA sentinel node evaluation may allow early CRC to be treated with organ-preserving surgery, while in more advanced-stage disease, a tailored lymphadenectomy can be performed considering the presence of aberrant lymphatic drainage and skip metastases.
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Affiliation(s)
- Francesco Crafa
- Division of General and Surgical Oncology, St. Giuseppe Moscati Hospital, Center of National Excellence and High Specialty, Avellino 83100, Italy
| | - Serafino Vanella
- Division of General and Surgical Oncology, St. Giuseppe Moscati Hospital, Center of National Excellence and High Specialty, Avellino 83100, Italy
| | - Onofrio A Catalano
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States
| | - Kelsey L Pomykala
- Department of Nuclear Medicine, Department of Radiological Sciences, David Geffen School of Medicine at University of California, Los Angeles, University Hospital Essen, University of Duisburg-Essen, Essen 45141, Germany
| | - Mario Baiamonte
- Division of General and Surgical Oncology, St. Giuseppe Moscati Hospital, Center of National Excellence and High Specialty, Avellino 83100, Italy
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Xu G, Yang M, Wang Q, Zhao L, Zhu S, Zhu L, Xu T, Cao R, Li C, Liu Q, Xiong W, Su Y, Dong J. A Novel Prognostic Prediction Model for Colorectal Cancer Based on Nine Autophagy-Related Long Noncoding RNAs. Front Oncol 2021; 11:613949. [PMID: 34692467 PMCID: PMC8531750 DOI: 10.3389/fonc.2021.613949] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 09/14/2021] [Indexed: 12/22/2022] Open
Abstract
Introduction Colorectal cancer (CRC) is the most common gastrointestinal cancer and has a low overall survival rate. Tumor–node–metastasis staging alone is insufficient to predict patient prognosis. Autophagy and long noncoding RNAs play important roles in regulating the biological behavior of CRC. Therefore, establishing an autophagy-related lncRNA (ARlncRNA)-based bioinformatics model is important for predicting survival and facilitating clinical treatment. Methods CRC data were retrieved from The Cancer Genome Atlas. The database was randomly divided into train set and validation set; then, univariate and multivariate Cox regression analyses were performed to screen prognosis-related ARlncRNAs for prediction model construction. Interactive network and Sankey diagrams of ARlncRNAs and messenger RNAs were plotted. We analyzed the survival rate of high- and low-risk patients and plotted survival curves and determined whether the risk score was an independent predictor of CRC. Receiver operating characteristic curves were used to evaluate model sensitivity and specificity. Then, the expression level of lncRNA was detected by quantitative real-time polymerase chain reaction, and the location of lncRNA was observed by fluorescence in situ hybridization. Additionally, the protein expression was detected by Western blot. Results A prognostic prediction model of CRC was built based on nine ARlncRNAs (NKILA, LINC00174, AC008760.1, LINC02041, PCAT6, AC156455.1, LINC01503, LINC00957, and CD27-AS1). The 5-year overall survival rate was significantly lower in the high-risk group than in the low-risk group among train set, validation set, and all patients (all p < 0.001). The model had high sensitivity and accuracy in predicting the 1-year overall survival rate (area under the curve = 0.717). The prediction model risk score was an independent predictor of CRC. LINC00174 and NKILA were expressed in the nucleus and cytoplasm of normal colonic epithelial cell line NCM460 and colorectal cancer cell lines HT29. Additionally, LINC00174 and NKILA were overexpressed in HT29 compared with NCM460. After autophagy activation, LINCC00174 expression was significantly downregulated both in NCM460 and HT29, while NKILA expression was significantly increased. Conclusion The new ARlncRNA-based model predicts CRC patient prognosis and provides new research ideas regarding potential mechanisms regulating the biological behavior of CRC. ARlncRNAs may play important roles in personalized cancer treatment.
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Affiliation(s)
- Guoqiang Xu
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Mei Yang
- Cadre Medical Department, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Qiaoli Wang
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Liufang Zhao
- The First Department of Head and Neck Surgery, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Sijin Zhu
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Lixiu Zhu
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Tianrui Xu
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Ruixue Cao
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Cheng Li
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Qiuyan Liu
- Department of Oncology, Affiliated Hospital of Panzhihua University, Panzhihua Integrated Traditional Chinese and Western Medicine Hospital, Panzhihua, China
| | - Wei Xiong
- Department of Radiotherapy, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yan Su
- Department of Graduate Student Management, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jian Dong
- Department of Medical Oncology, Yunnan Cancer Hospital, the Third Affiliated Hospital of Kunming Medical University, Kunming, China
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Ribeiro C, Gante I, Dias MF, Gomes A, Silva HC. A new application to one-step nucleic acid amplification-discarded sample in breast cancer: Preliminary results. Mol Clin Oncol 2021; 15:216. [PMID: 34476100 DOI: 10.3892/mco.2021.2380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 06/07/2021] [Indexed: 01/23/2023] Open
Abstract
The one-step nucleic acid amplification (OSNA) assay is a molecular method used for detecting breast cancer (BC) metastasis in sentinel lymph nodes (SLNs). However, this method has a major disadvantage, since it prevents tissue structure analysis, while only one molecular marker can be evaluated, namely cytokeratin 19 mRNA. The aim of the present study was to evaluate whether an OSNA-discarded sample could be suitable for the gene expression analysis of the SLN microenvironment. The remaining intermediate phase of the centrifuged SLN homogenate obtained from the OSNA assay of samples from two patients with BC was used for mRNA extraction. Subsequently, the expression of five genes, namely forkhead box, cluster of differentiation 4 and three control genes, was determined by reverse transcription-quantitative PCR analysis. The results demonstrated that high-quality RNA was extracted. Therefore, this RNA may be used for gene expression analyses to predict novel molecular biomarkers associated with immuno-inflammatory microenvironment.
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Affiliation(s)
- Carolina Ribeiro
- Institute of Medical Genetics/UC Genomics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Inês Gante
- University Clinic of Gynecology, Coimbra Hospital and University Centre (CHUC), 3000-075 Coimbra, Portugal
| | - Margarida Figueiredo Dias
- University Clinic of Gynecology, Coimbra Hospital and University Centre (CHUC), 3000-075 Coimbra, Portugal
| | - Ana Gomes
- Department of Pathology, Coimbra Hospital and University Centre (CHUC), 3000-075 Coimbra, Portugal
| | - Henriqueta Coimbra Silva
- Institute of Medical Genetics/UC Genomics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.,Coimbra Institute for Clinical and Biomedical Research-Center of Investigation on Environment, Genetics and Oncobiology (iCBR-CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
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Shi W, Li X, Su X, Wen H, Chen T, Wu H, Liu M. The role of multiple metabolic genes in predicting the overall survival of colorectal cancer: A study based on TCGA and GEO databases. PLoS One 2021; 16:e0251323. [PMID: 34398900 PMCID: PMC8367004 DOI: 10.1371/journal.pone.0251323] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 04/25/2021] [Indexed: 12/22/2022] Open
Abstract
The recent advances in gene chip technology have led to the identification of multiple metabolism-related genes that are closely associated with colorectal cancer (CRC). Nevertheless, none of these genes could accurately diagnose or predict CRC. The prognosis of CRC has been made by previous prognostic models constructed by using multiple genes, however, the predictive function of multi-gene prognostic models using metabolic genes for the CRC prognosis remains unexplored. In this study, we used the TCGA-CRC cohort as the test dataset and the GSE39582 cohort as the experimental dataset. Firstly, we constructed a prognostic model using metabolic genes from the TCGA-CRC cohort, which were also associated with CRC prognosis. We analyzed the advantages of the prognostic model in the prognosis of CRC and its regulatory mechanism of the genes associated with the model. Secondly, the outcome of the TCGA-CRC cohort analysis was validated using the GSE39582 cohort. We found that the prognostic model can be employed as an independent prognostic risk factor for estimating the CRC survival rate. Besides, compared with traditional clinical pathology, it can precisely predict CRC prognosis as well. The high-risk group of the prognostic model showed a substantially lower survival rate as compared to the low-risk group. In addition, gene enrichment analysis of metabolic genes showed that genes in the prognostic model are enriched in metabolism and cancer-related pathways, which may explain its underlying mechanism. Our study identified a novel metabolic profile containing 11 genes for prognostic prediction of CRC. The prognostic model may unravel the imbalanced metabolic microenvironment, and it might promote the development of biomarkers for predicting treatment response and streamlining metabolic therapy in CRC.
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Affiliation(s)
- Weijun Shi
- Department of Gastroenterology, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Xincan Li
- Department of General Medicine, Second Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Xu Su
- School of Life Sciences, Anhui Province Key Laboratory of Translational Cancer Research, Bengbu Medical College, Bengbu, China
| | - Hexin Wen
- Department of Gastroenterology, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Tianwen Chen
- Department of Gastroenterology, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - Huazhang Wu
- School of Life Sciences, Anhui Province Key Laboratory of Translational Cancer Research, Bengbu Medical College, Bengbu, China
- * E-mail: (HW); (ML)
| | - Mulin Liu
- Department of Gastroenterology, First Affiliated Hospital of Bengbu Medical College, Bengbu, China
- * E-mail: (HW); (ML)
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Hiyoshi Y, Akiyoshi T, Fukunaga Y. The advantage of one-step nucleic acid amplification for the diagnosis of lymph node metastasis in colorectal cancer patients. Ann Gastroenterol Surg 2021; 5:60-66. [PMID: 33532681 PMCID: PMC7832960 DOI: 10.1002/ags3.12392] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/28/2020] [Accepted: 08/01/2020] [Indexed: 12/20/2022] Open
Abstract
Generally, the postoperative examination of lymph nodes (LNs) is based on a microscopic examination of one hematoxylin and eosin (HE)-stained slide; however, an examination of only one part of the LN might lead to incorrect staging of the tumor due to tissue allocation bias. Although multilevel sectioning and the use of immunohistochemistry (IHC) have improved the detection of micrometastases in LNs, this approach is laborious, time-consuming, and costly. A novel molecular technique for the detection of LN metastases of tumors, called one-step nucleic acid amplification (OSNA), is a rapid and semi-quantitative examination quantifying the number of cytokeratin 19 (CK-19) mRNA copies derived from a tumor. OSNA is already in clinical use for the diagnosis of LN metastasis in breast cancer patients; however, the use of OSNA is under investigation with promising results for colorectal cancer (CRC). The present review assessed recent studies on OSNA vs a histopathological examination and its implications for CRC staging and treatment. A total of 16 studies of OSNA in CRC yielded by a PubMed search were reviewed. Among them, seven studies evaluating the diagnostic performance revealed that OSNA had a high specificity (96.8%), high concordance rate (96.0%), and negative predictive value (98.6%) in a pooled assessment. In addition, four studies examining the utility of OSNA in sentinel LNs (SLNs) and two studies focusing on upstaging in pathologically node-negative CRC patients were also reviewed. Multicenter prospective studies with a large cohort of CRC patients are warranted to reveal the benefits of OSNA in the future.
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Affiliation(s)
- Yukiharu Hiyoshi
- Gastroenterological CenterDepartment of Gastroenterological SurgeryThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Takashi Akiyoshi
- Gastroenterological CenterDepartment of Gastroenterological SurgeryThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
| | - Yosuke Fukunaga
- Gastroenterological CenterDepartment of Gastroenterological SurgeryThe Cancer Institute Hospital of Japanese Foundation for Cancer ResearchTokyoJapan
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Itabashi M, Yamamoto H, Tomita N, Inomata M, Murata K, Hayashi S, Miyake Y, Igarashi S, Kato T, Noura S, Furuhata T, Ozawa H, Takemasa I, Yasui M, Takeyama H, Okamura S, Ohno Y, Matsuura N. Lymph Node Positivity in One-Step Nucleic Acid Amplification is a Prognostic Factor for Postoperative Cancer Recurrence in Patients with Stage II Colorectal Cancer: A Prospective, Multicenter Study. Ann Surg Oncol 2019; 27:1077-1083. [PMID: 31722072 PMCID: PMC7060165 DOI: 10.1245/s10434-019-07971-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Indexed: 01/11/2023]
Abstract
Background For colorectal cancer (CRC) patients, the standard histological lymph node (LN) evaluation has low sensitivity. Our previously developed one-step nucleic acid amplification (OSNA™) assay measures cytokeratin 19 gene expression in whole LNs. We recently showed that 17.6% of pN0 stage II CRC patients were OSNA positive, suggesting a correlation between OSNA results and disease recurrence. This multicenter, prospective study investigateed the prognostic value of the OSNA assay for pStage II CRC patients. Methods We examined 204 CRC patients who were preoperatively diagnosed as cN0 and cN1 and surgically treated at 11 medical institutions across Japan. Nine patients were excluded, and 195 patients (Stage I: n = 50, Stage II: n = 70, Stage III: n = 75) were examined. All LNs, harvested from patients, were examined histopathologically using one-slice hematoxylin–eosin staining. Furthermore, half of the LNs was examined by the OSNA assay. Patients were classified according to the UICC staging criteria and OSNA results, and the 3-year, disease-free survival (DFS) of each cohort was analyzed. Results Average 21.2 LNs/patient were subject to pathological examination. Approximately half of all harvested LNs (average, 9.4 LNs/patient) were suitable for the OSNA assay. Significantly lower 3-year DFS rates were observed in pStage (pathological Stage) II OSNA-positive patients than in OSNA-negative patients (p = 0.005). Among all assessed clinical and pathological parameters, only the OSNA result significantly affected 3-year DFS rates in pStage II CRC patients (p = 0.027). Conclusions This study shows that OSNA positivity is a risk factor for recurrence of the patients with pStage II CRC. Electronic supplementary material The online version of this article (10.1245/s10434-019-07971-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Michio Itabashi
- Institute of Gastroenterology, Tokyo Women's Medical University, Shinjuku, Japan
| | - Hirofumi Yamamoto
- Department of Molecular Pathology, Division of Health Sciences, Graduate School of Medicine, Osaka University, Suita, Japan.
| | - Naohiro Tomita
- Division of Lower GI Surgery, Department of Surgery, Hyogo College of Medicine, Nishinomiya, Japan
| | - Masafumi Inomata
- Department of Gastroenterological and Pediatric Surgery, Faculty of Medicine, Oita University, Oita, Japan
| | - Kohei Murata
- Department of Surgery, Kansai Rosai Hospital, Amagasaki, Japan
| | - Shigeoki Hayashi
- Department of Digestive Surgery, Nihon University Hospital, Chiyoda, Japan
| | - Yasuhiro Miyake
- Department of Surgery, Osaka Minato Central Hospital, Osaka, Japan
| | - Seiji Igarashi
- Division of Pathology, Tsuboi Cancer Center Hospital, Koriyama, Japan
| | - Takeshi Kato
- Department of Colorectal Surgery, National Hospital Organization Osaka National Hospital, Osaka, Japan
| | - Shingo Noura
- Department of Surgery, Osaka Rosai Hospital, Sakai, Japan
| | - Tomohisa Furuhata
- Division of Gastroenterological and General Surgery, St. Marianna University Toyoko Hospital, Kawasaki, Japan
| | - Heita Ozawa
- Department of Colorectal Surgery, Tochigi Cancer Center, Utsunomiya, Japan
| | - Ichiro Takemasa
- Department of Surgery, Surgical Oncology and Science, Sapporo Medical University, Sapporo, Japan
| | - Masayoshi Yasui
- Department of Gastroenterological Surgery, Osaka International Cancer Institute, Osaka, Japan
| | | | - Shu Okamura
- Department of Surgery, Suita Municipal Hospital, Suita, Japan
| | - Yuko Ohno
- Department of Mathematical Health Science, Graduate School of Medicine, Osaka University, Suita, Japan
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