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Smoking Is a Risk Factor of colorectal Advanced adenomas Compared to Nonadvanced adenomas

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Open Journal of Gastroenterology 2022年第10期12卷 278-285页

作者： Siyong Chen Hailing Liu Tongfeng Zhao Department of Endocrinology The Sixth Affiliated Hospital Sun Yat-sen University Guangzhou China Guangdong Provincial Key Laboratory of colorectal and Pelvic Floor Diseases The Sixth Affiliated Hospital Sun Yat-sen University Guangzhou China Department of Pathology The Sixth Affiliated Hospital Sun Yat-sen University Guangzhou China

Background: It is uncertain that whether smoking is a risk factor of colorectal advanced adenomas compared to nonadvanced adenomas, so we peformed the case-control study to explore this issue. Material and Methods: The cases were defined as patients with advanced adenomas and the controls were patients with nonadvanced adenomas. Clinical data were extracted from the hospital information system. Missing data were imputed with the multiple imputation of chained equations method, and the effect of smoking on the risk of advanced adenomas was calculated by binary logistic regression models to obtain odds ratios (ORs) and 95% confidence interval. Results: Current smoking rate in patients with advanced adenomas was significantly higher than that in patients with nonadvanced adenomas (31.6% VS 23.1%), the OR of advanced adenoma for current smoking compared with nonsmoking was 1.54 (1.09, 2.18), P = 0.013, and the weighted ORs ranged from 1.50 (1.01, 2.23) to 1.58 (1.09, 2.30), and the results of sensitivity analyses were still consistent. Conclusion: In adults with Han ethnicity in South China, current smoking is a risk factor of colorectal advanced adenomas compared to nonadvanced adenomas.

关键词： Smoking colorectal adenomas Advanced adenomas

EXPRESSION OF TGF-β1 AND TGF-β R II IN colorectal adenomas OF VARYING STAGES

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2001年第1期 108-111页

作者：王达何超丁伟王慧萍

To study the function of transforming growth factor β\-1 (TGF-β\-1) and transforming growth factor-β type II receptor (TGF-βR II) in varying stages of colorectal adenoma during neoplastic transformation, fifty-five cases of resected colorectal adenomas were examined immunohistochemically. Our results showed that the expression of TGF-β\-1 ranged from high to low, with the progression of low-grade to high-grade dysplasia of adenomas to carcinoma. And there was significantly different expression of TGF-β\-1 between moderate and high dysplasia adenomas (Padenomas. Our results suggested that the quantities of TGF-β\-1 secreted by adenoma cells decrease dramatically in moderate to severe dysplasia colorectal adenomas. It is the decreased secretion of TGF-β\-1, rather than the mutated TGF-βR II that may play an important role in transforming colorectal adenomas to adenocarcinomas.

关键词： colorectal adenomas TGF-β\-1 TGF-βR II immunohistochemistry

Non-optical polyp-based resect and discard strategy:A prospective clinical study

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World Journal of Gastroenterology 2022年第19期28卷 2137-2147页

作者： Mahsa Taghiakbari Celia Hammar Mira Frenn Roupen Djinbachian Heiko Pohl Erik Deslandres Simon Bouchard Mickael Bouin Daniel von Renteln Department of Gastroenterology Montreal University Hospital Research Center(CRCHUM)Montréal H2X 0A9QuebecCanada Department of Gastroenterology University of MontrealFaculty of MedicineMontreal H2X 0A9QuebceCanada Department of Internal Medicine University of Montreal Hospital Center(CHUM)Montreal H2X 0A9QuebecCanada Department of Medicine Veterans Affairs Medical CenterWhite River JunctionVT 05009United States Department of Gastroenterology Dartmouth Geisel School of Medicine and The Dartmouth InstituteHanoverNH 03755United States

BACKGROUND Post-polypectomy surveillance intervals are currently determined based on pathology results.AIM To evaluate a polyp-based resect and discard model that assigns surveillance intervals based solely on polyp number and size.METHODS Patients undergoing elective colonoscopies at the Montreal University Medical Center were enrolled prospectively.The polyp-based strategy was used to assign the next surveillance interval using polyp size and number.Surveillance intervals were also assigned using optical diagnosis for small polyps(<10 mm).The primary outcome was surveillance interval agreement between the polyp-based model,optical diagnosis,and the pathology-based reference standard using the 2020 United States Multi-Society Task Force guidelines.Secondary outcomes included the proportion of reduction in required histopathology evaluations and proportion of immediate post-colonoscopy recommendations provided to patients.RESULTS Of 944 patients(mean age 62.6 years,49.3%male,933 polyps)were enrolled.The surveillance interval agreement for the polyp-based strategy was 98.0%[95%confidence interval(CI):0.97-0.99]compared with pathology-based assignment.Optical diagnosis-based intervals achieved 95.8%(95%CI:0.94-0.97)agreement with pathology.When using the polyp-based strategy and optical diagnosis,the need for pathology assessment was reduced by 87.8%and 70.6%,respectively.The polyp-based strategy provided 93.7%of patients with immediate surveillance interval recommendations vs 76.1%for optical diagnosis.CONCLUSION The polyp-based strategy achieved almost perfect surveillance interval agreement compared with pathology-based assignments,significantly reduced the number of required pathology evaluations,and provided most patients with immediate surveillance interval recommendations.

关键词： Colonoscopy colorectal pathology colorectal adenomas Endoscopy Surveillance Optical diagnosis

Expression of Notch pathway components (Numb, Itch, and Siah-1) in colorectal tumors: A clinicopathological study

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World Journal of Gastroenterology 2020年第26期26卷 3814-3833页

作者： Sinem Cil Gonulcu Betul Unal Ibrahim Cumhur Bassorgun Mualla Ozcan Hasan Senol Coskun Gulsum Ozlem Elpek Department of Pathology Akdeniz UniversitySchool of MedicineAntalya 07070Turkey Department of Oncology Akdeniz UniversitySchool of MedicineAntalya 07070Turkey

BACKGROUND The role of the Notch pathway in carcinogenesis and tumor progression has been demonstrated in many organs,including the colon.Accordingly,studies aimed at developing therapies targeting this pathway in various cancers require the identification of several factors that may play a role in regulating Notch-1 expression.Although Numb,Itch,and seven in absentia homolog-1(Siah-1)have been shown to contribute to the regulation of Notch signaling,their role in colorectal carcinogenesis and tumor progression has not been fully elucidated to date.AIM To evaluate Numb,Itch,and Siah-1 expression in colorectal tumors to clarify their relationship with Notch-1 expression and their role in carcinogenesis and tumor behavior.METHODS Expression of Notch-1,Numb,Itch,and Siah-1 was investigated in 50 colorectal carcinomas,30 adenomas,and 20 healthy colonic tissues by immunohistochemistry and quantitative real-time polymerase chain reaction(PCR)analyses.RESULTS In contrast to Notch-1,which is expressed at higher levels in tumor tissues and adenomas,expression of Numb,Itch,and Siah-1 was stronger and more frequent in normal mucosa(Pcolorectal carcinoma and indicate that loss of Numb,Itch,and Siah-1 expression is associated with carcinogenesis.Our data also suggest that these three proteins might be involved in the Notch-1 pathway during colorectal carcinoma(CRC)progression and might play

关键词： colorectal adenomas colorectal cancer Notch-1 Numb Itch Siah-1