A randomised controlled blinded trial to investigate the effect of hyoscine butylbromide during colonoscopy on rates of polyp detection.
Ontology highlight
ABSTRACT:
DISEASE(S): Oral And Gastrointestinal-other Diseases Of The Mouth, Teeth, Oesophagus, Digestive System Including Liver And Colon,Cancer-bowel-back Passage (rectum) Or Large Bowel (colon),Colonic Polyposis
PROVIDER: 2454304 | ecrin-mdr-crc |
REPOSITORIES: ECRIN MDR
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Project description:Colorectal cancer often arises from adenomatous polyps. Polyps can grow and progress to cancer, but may also remain static in size, regress, or resolve. Prediciting which progress to cancer and which remain benign is difficult. We developed a long-lived murine model of colorectal cancer with tumors that can be followed by colonoscopy. Our aim was to assess whether these tumors have similar growth patterns and histologic fates to human colorectal polyps to identify features to aid in risk stratification of colonic tumors. Long-lived Apcin/+ mice were treated with 4% dextran sodium sulfate to promote colonic tumorigenesis. Tumor growth patterns were characterized by serial colonoscopy, and pathology was determined. Serial biopsies of tumors were obtained for immunohistochemistry and gene expression profiling by microarray analysis with Affymetrix Whole Genome array. Tumors (n=424) grew, remained static, regressed, or resolved over time with different relative frequencies. Newly developed tumors demonstrated dynamic growth patterns with higher rates of growth and resolution, while more established tumors tended to remain static in size. Colonic tumors were hyperplastic lesions (3%), adenomas (73%), intramucosal carcinomas (20%), or adenocarcinomas (3%). Differentially expressed genes between adenomas and intramucosal carcinomas were identified. We did not identify differentially expressed genes between early and late biopsies from the same tumor. This novel murine model of intestinal tumorigenesis develops colonic tumors that can be monitored by serial colonoscopy, mirror growth patterns seen in human colorectal polyps, and progress to colorectal cancer. Further characterization of cellular and molecular features are needed to determine which features can be used to risk-stratify polyps for progress to colorectal cancer and potentially guide prevention strategies. F1 (SWR x C57BL/6) Apcin/+ mice who had been given two treatments of 4% dextran sodium sulfate in drinking water at weaning underwent colonoscopy around 80 days of age. Those with distal colonic tumors amenable to biopsy had two biopsies taken at that time. Tumors were monitored by colonoscopy every 14 days. Every 28 days, two additional biopsies were taken of each tumor. This protocol was repeated until mice were moribund. Six tumors were removed after sacrifice. The earliest and latest biopsies of each tumor were selected for RNA extraction and Affymetrix hybridization.
2014-05-03 | E-GEOD-46626 | biostudies-arrayexpress
Project description:Colorectal cancer often arises from adenomatous polyps. Polyps can grow and progress to cancer, but may also remain static in size, regress, or resolve. Prediciting which progress to cancer and which remain benign is difficult. We developed a long-lived murine model of colorectal cancer with tumors that can be followed by colonoscopy. Our aim was to assess whether these tumors have similar growth patterns and histologic fates to human colorectal polyps to identify features to aid in risk stratification of colonic tumors. Long-lived Apc^Min/+ mice were treated with 4% dextran sodium sulfate to promote colonic tumorigenesis. Tumor growth patterns were characterized by serial colonoscopy, and pathology was determined. Serial biopsies of tumors were obtained for immunohistochemistry and gene expression profiling by microarray analysis with Affymetrix Whole Genome array. Tumors (n=424) grew, remained static, regressed, or resolved over time with different relative frequencies. Newly developed tumors demonstrated dynamic growth patterns with higher rates of growth and resolution, while more established tumors tended to remain static in size. Colonic tumors were hyperplastic lesions (3%), adenomas (73%), intramucosal carcinomas (20%), or adenocarcinomas (3%). Differentially expressed genes between adenomas and intramucosal carcinomas were identified. We did not identify differentially expressed genes between early and late biopsies from the same tumor. This novel murine model of intestinal tumorigenesis develops colonic tumors that can be monitored by serial colonoscopy, mirror growth patterns seen in human colorectal polyps, and progress to colorectal cancer. Further characterization of cellular and molecular features are needed to determine which features can be used to risk-stratify polyps for progress to colorectal cancer and potentially guide prevention strategies.
2014-05-03 | GSE46626 | GEO
Project description:In this work, we performed gene expression profiling for twenty-paired blood samples collected from healthy controls before and after colonoscopy, and twenty blood samples collected from<br>colorectal cancer patients after colonoscopy. The aim of this study is to determine how significant the colonoscopy procedure may impact the global gene expression in human peripheral blood, and whether this colonoscopy induced variability would bias the biomarker research for colorectal cancer early detection.
2013-10-01 | E-MEXP-3756 | biostudies-arrayexpress
Project description:Interventions: Group 1: colonoscopy with AI System
Primary outcome(s): The rate of correctly classified polyps detected by the AI system (accuracy).
The polyp classification is documented during the colonoscopy using the case report form(CRF).
Later the result is compared with histology(gold standard).
Study Design: Allocation: N/A: single arm study; Masking: Open (masking not used); Control: uncontrolled; Assignment: single; Study design purpose: prevention
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Project description:Adenomatous polyps adjacent to colorectal cancer (CRC) were found to exhibit two distinct microRNAs (miRs) patterns from normal mucosa to low- and separately, to high-grade dysplasia; presence in screen-detected adenoma of non-cancer patients is unknown. Global miR expression was performed on biopsies obtained from 109 healthy patients undergoing screening/surveillance colonoscopy. Included were normal mucosa (NM); hyperplastic polyp (HP); tubular adenoma (TA), tubulovillous adenoma, with or without, high-grade dysplasia (TVHG) and serrated-polyps; sessile serrated adenoma (SSA) and traditional serrated adenoma (TSA). Logistic regression was used to model miRs predictive of histology and CRC risk. We identified 99 miRs that differed across five histologic groups (FDR=0.05) and that accurately separated on histology (Concordance Index (CI)=0.96). In HPNM, miRs-145, -143, -107a, -23b, and -24 were upregulated whereas miRs-663, -1268, -320b, -1275, and -671 where overexpressed in TVHGs (FDR P<0 .05). The expression of miR-145 and -30a showed high accuracy to separate low from high-risk polyps independent of serrated status (CI= 97.1%; AUC 93.4%). For TSAs, miR-125b and -199a were uniquely downregulated relative to HPNMs and miR-335 discriminated between non-serrated and serrated histology. Histologically advanced polyps from non-cancer patients share miR alterations with those reported for CRC and high-grade adenoma adjacent to tumor including downregulation of immune regulatory miRs-125 and -199a in TSAs; polyp that frequently present with in situ carcinoma. These data extend evidence that miR patterns of high-risk adenoma are detectable in subset of screen-detected adenoma for which measurement may be useful in in adenoma risk stratification.
2015-09-29 | GSE73487 | GEO
Project description:Interventions: During the first part of the procedure the colonoscope is inserted through the rectum and advanced to the large intestine, using conventional colonoscopy in both groups for detecting lesions. Thereafter, patients will be randomly assigned to colonoscope withdrawal using either conventional wide-angle (approximately 10 minutes) or narrow-band imaging (NBI) technology. The colonoscopies will be performed using High Definition monitors. Appropriate and complete bowel preparation before colonoscopy will be ensured using four liters of polyethylene glycol lavage until clear rectal fluid will be evacuated as well as cleaning enema
Primary outcome(s): Mean number of polyps per patient assessed by one endoscopist[During procedure];Total number of detected polyps assessed by one endoscopist[During procedure]
Study Design: Purpose: Diagnosis; Allocation: Randomised controlled trial; Masking: Open (masking not used);Assignment: Parallel;Type of endpoint: Efficacy
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Project description:We report the RNA-seq data of 40 advanced colorectal adenoma patients form Dongguk University Ilsan International Hospital. The polyps with a diameter of 1cm or greater were regarded as advenced colorectal adenoma and obtained through colonoscopy. The data consist of 22 tublar adenoma, 6 tublovillous adenoma, 5 sessile serrated adenoma/polyp, 1 traditional serrated adenoma, intramucosal adenocarcinoma, neuroendocrine tumor, hyperplastic polyp, inflammatory polyp, high grade dysplasia, and atypical glands with adjacent hyperplastic mucosa.
2023-08-07 | GSE154548 | GEO
Project description:Screening and surveillance of colorectal cancers (CRCs) using advanced colonoscopy technologies have significantly reduced the incidence and mortality rates of CRCs in recent years. However, a significant portion of CRCs are still remained undiagnosed, especially those involving sessile serrated adenomas/polyps (SSA/P), most likely due to their flat shape and the excessive amounts of secreted mucin that cover the polyps, making them invisible for colonoscopy. Here, a potential alternative solution is the application of molecular markers enabling unambiguous characterization of SSPs. However, full implementation of this strategy requires availability of robust markers which are still lacking. In this work by comprehensive molecular analysis of several malignant and normal samples at the genome, methylome and transcriptome levels we show that activating mutation of BRAF-V600E drives the generation of a unique SSP-specific DNA methylation profile. As the result a robust set of DNA methylation markers showing significant (~3 to 30 fold) increase in their methylation levels, exclusively in SSP samples, are introduced. These markers can be of important clinical relevance, especially in early diagnosis of SSPs using non-invasive approaches such as fecal DNA testing.
2018-04-09 | GSE110536 | GEO
Project description:Screening and surveillance of colorectal cancers (CRCs) using advanced colonoscopy technologies have significantly reduced the incidence and mortality rates of CRCs in recent years. However, a significant portion of CRCs are still remained undiagnosed, especially those involving sessile serrated adenomas/polyps (SSA/P), most likely due to their flat shape and the excessive amounts of secreted mucin that cover the polyps, making them invisible for colonoscopy. Here, a potential alternative solution is the application of molecular markers enabling unambiguous characterization of SSPs. However, full implementation of this strategy requires availability of robust markers which are still lacking. In this work by comprehensive molecular analysis of several malignant and normal samples at the genome, methylome and transcriptome levels we show that activating mutation of BRAF-V600E drives the generation of a unique SSP-specific DNA methylation profile. As the result a robust set of DNA methylation markers showing significant (~3 to 30 fold) increase in their methylation levels, exclusively in SSP samples, are introduced. These markers can be of important clinical relevance, especially in early diagnosis of SSPs using non-invasive approaches such as fecal DNA testing.
2018-04-09 | GSE110535 | GEO
Project description:Screening and surveillance of colorectal cancers (CRCs) using advanced colonoscopy technologies have significantly reduced the incidence and mortality rates of CRCs in recent years. However, a significant portion of CRCs are still remained undiagnosed, especially those involving sessile serrated adenomas/polyps (SSA/P), most likely due to their flat shape and the excessive amounts of secreted mucin that cover the polyps, making them invisible for colonoscopy. Here, a potential alternative solution is the application of molecular markers enabling unambiguous characterization of SSPs. However, full implementation of this strategy requires availability of robust markers which are still lacking. In this work by comprehensive molecular analysis of several malignant and normal samples at the genome, methylome and transcriptome levels we show that activating mutation of BRAF-V600E drives the generation of a unique SSP-specific DNA methylation profile. As the result a robust set of DNA methylation markers showing significant (~3 to 30 fold) increase in their methylation levels, exclusively in SSP samples, are introduced. These markers can be of important clinical relevance, especially in early diagnosis of SSPs using non-invasive approaches such as fecal DNA testing.
2018-04-09 | GSE110537 | GEO