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https://www.readbyqxmd.com/read/28326211/early-onset-signet-ring-cell-adenocarcinoma-of-the-colon-a-case-report-and-review-of-the-literature
#1
Maliha Khan, Krittiya Korphaisarn, Aneeqa Saif, Wai C Foo, Scott Kopetz
Colorectal cancer (CRC) remains the second leading cause of cancer-related deaths in the United States. While a decline has been observed in the older population, the occurrence of CRC in the adolescent and young adult (AYA) population has increased over the past two decades. The histopathologic characteristics and clinical behavior of CRC in AYA patients have been shown to be distinct from those of CRC in older adults. The rarer subtypes of CRC such as mucinous adenocarcinoma and signet-ring cell carcinoma are associated with a poorer prognosis compared to the more common subtypes...
2017: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/28299802/bmp-and-notch-interaction-in-crc-subtypes
#2
Shazia Irshad, Mukesh Bansal, Paolo Guarnieri, Hayley Davis, Ayman Al Haj Zen, Brygida Baran, Claudia Maria Assunta Pinna, Haseeb Rahman, Sujata Biswas, Chiara Bardella, Rosemary Jeffery, Lai Mun Wang, James Edward East, Annabelle Lewis, Ian Tomlinson, Simon John Leedham
The functional role of Bone Morphogenetic Protein (BMP) signalling in colorectal cancer (CRC) is poorly defined, with contradictory results in cancer cell line models reflecting the inherent difficulties of assessing a signalling pathway that is context dependent and subject to genetic constraints. By assessing the transcriptional response of a diploid human colonic epithelial cell line to BMP ligand stimulation we generated a prognostic BMP signalling signature, which was applied to multiple CRC datasets to investigate BMP heterogeneity across CRC molecular subtypes...
March 15, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28293308/mismatch-repair-proteins-and-microsatellite-instability-in-colorectal-carcinoma-mlh1-msh2-msh6-and-pms2-histopathological-and-immunohistochemical-study
#3
Nour El Hoda S Ismael, Samar A El Sheikh, Suzan M Talaat, Eman M Salem
BACKGROUND: Colorectal cancer (CRC) is one of the most common cancers worldwide. Microsatellite instability (MSI) is detected in about 15% of all colorectal cancers. CRC with MSI has particular characteristics such as improved survival rates and better prognosis. They also have a distinct sensitivity to the action of chemotherapy. AIM: The aim of the study was to detect microsatellite instability in a cohort of colorectal cancer Egyptian patients using the immunohistochemical expression of mismatch repair proteins (MLH1, MSH2, MSH6 and PMS2)...
March 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28289479/colorectal-adenoma-and-carcinoma-specific-mirna-profiles-in-biopsy-and-their-expression-in-plasma-specimens
#4
Zsófia Brigitta Nagy, Barnabás Wichmann, Alexandra Kalmár, Orsolya Galamb, Barbara Kinga Barták, Sándor Spisák, Zsolt Tulassay, Béla Molnár
BACKGROUND: MiRNA expression markers are well characterized in colorectal cancer (CRC), but less is known about miRNA expression profiles in colorectal adenomas. Genome-wide miRNA and mRNA expression analyses were conducted through the colorectal adenoma dysplasia sequence. Furthermore, analysis of the expression levels of miRNAs in matched plasma samples was performed, focusing on biomarker candidates; miRNA and mRNA expression analyses were performed on colorectal biopsies and plasma samples (20 normals; 11 tubular and 9 tubulovillous adenomas; 20 colorectal carcinomas) by miRNA 3...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28280610/investigation-of-the-human-h3-3b-h3f3b-gene-expression-as-a-novel-marker-in-patients-with-colorectal-cancer
#5
Habib Allah Ayoubi, Frouzandeh Mahjoubi, Rezvan Mirzaei
BACKGROUND: H3.3 histone is a replacement histone subtype that is express in entire cell cycle phases and overexpress in transcriptionally active regions, promoter regions, and intergenic or intragenic regulatory elements. This histone encoded by two genes termed H3.3A (H3F3A) and H3.3B (H3F3B). Mutations of these two genes lead to some human cancers such as chondroblastoma, osteosarcoma, and epithelial ovarian cancer. The aims of this study were to quantitatively examine the expression of H3...
February 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28278514/distinct-clinical-outcomes-of-two-cimp-positive-colorectal-cancer-subtypes-based-on-a-revised-cimp-classification-system
#6
Jeong Mo Bae, Jung Ho Kim, Yoonjin Kwak, Dae-Won Lee, Yongjun Cha, Xianyu Wen, Tae Hun Lee, Nam-Yun Cho, Seung-Yong Jeong, Kyu Joo Park, Sae Won Han, Hye Seung Lee, Tae-You Kim, Gyeong Hoon Kang
BACKGROUND: Colorectal cancer (CRC) is a heterogeneous disease in terms of molecular carcinogenic pathways. Based on recent findings regarding the multiple serrated neoplasia pathway, we revised an eight-marker panel for a new CIMP classification system. METHODS: 1370 patients who received surgical resection for CRCs were classified into three CIMP subtypes (CIMP-N: 0-4 methylated markers, CIMP-P1: 5-6 methylated markers and CIMP-P2: 7-8 methylated markers). Our findings were validated in a separate set of high-risk stage II or stage III CRCs receiving adjuvant fluoropyrimidine plus oxaliplatin (n=950)...
March 9, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28277887/rnai-high-throughput-screening-of-single-and-multi-cell-type-tumor-spheroids-a-comprehensive-analysis-in-two-and-three-dimensions
#7
Jiaqi Fu, Daniel Fernandez, Marc Ferrer, Steven A Titus, Eugen Buehler, Madhu A Lal-Nag
The widespread use of two-dimensional (2D) monolayer cultures for high-throughput screening (HTS) to identify targets in drug discovery has led to attrition in the number of drug targets being validated. Solid tumors are complex, aberrantly growing microenvironments that harness structural components from stroma, nutrients fed through vasculature, and immunosuppressive factors. Increasing evidence of stromally-derived signaling broadens the complexity of our understanding of the tumor microenvironment while stressing the importance of developing better models that reflect these interactions...
March 1, 2017: SLAS Discov
https://www.readbyqxmd.com/read/28277374/clinical-predictors-for-kras-codon-13-mutations-in-patients-with-colorectal-cancer
#8
Min S Kwak, Jae M Cha, Young H Cho, Sang H Kim, Jin Y Yoon, Jung W Jeon, Hyun P Shin, Kwang R Joo, Joung I Lee
GOALS: This study sought to clarify sex differences in KRAS mutations and clinical predictors of KRAS 13 codon mutations. BACKGROUND: Sex differences in KRAS mutations and predictors for KRAS codon 13 mutations in colorectal cancer (CRC) are unclear. STUDY: Between October 2007 and May 2016, 328 patients underwent surgery for CRCs that were analyzed for KRAS mutations at a referral university hospital. Sex differences in the rates and distributions of KRAS mutations, and factors predictive of overall KRAS and KRAS codon 13 mutations were analyzed...
March 8, 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/28268248/dietary-glycemic-and-insulin-scores-and-colorectal-cancer-survival-by-tumor-molecular-biomarkers
#9
NaNa Keum, Chen Yuan, Reiko Nishihara, Emilie Zoltick, Tsuyoshi Hamada, Alejandro Martinez Fernandez, Xuehong Zhang, Akiko Hanyuda, Li Liu, Keisuke Kosumi, Jonathan A Nowak, Iny Jhun, T Rinda Soong, Teppei Morikawa, Fred K Tabung, Zhi Rong Qian, Charles S Fuchs, Jeffrey A Meyerhardt, Andrew T Chan, Kimmie Ng, Shuji Ogino, Edward L Giovannucci, Kana Wu
Accumulating evidence suggests that post-diagnostic insulin levels may influence colorectal cancer (CRC) survival. Yet, no previous study has examined CRC survival in relation to a post-diagnostic diet rich in foods that increase post-prandial insulin levels. We hypothesized that glycemic and insulin scores (index or load; derived from food frequency questionnaire data) may be associated with survival from specific CRC subtypes sensitive to the insulin signaling pathway. We prospectively followed 1,160 CRC patients from the Nurses' Health Study (1980-2012) and Health Professionals Follow-Up Study (1986-2012), resulting in 266 CRC deaths in 10,235 person-years...
March 7, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28267766/association-of-smad4-mutation-with-patient-demographics-tumor-characteristics-and-clinical-outcomes-in-colorectal-cancer
#10
Amir Mehrvarz Sarshekeh, Shailesh Advani, Michael J Overman, Ganiraju Manyam, Bryan K Kee, David R Fogelman, Arvind Dasari, Kanwal Raghav, Eduardo Vilar, Shanequa Manuel, Imad Shureiqi, Robert A Wolff, Keyur P Patel, Raja Luthra, Kenna Shaw, Cathy Eng, Dipen M Maru, Mark J Routbort, Funda Meric-Bernstam, Scott Kopetz
SMAD4 is an essential mediator in the transforming growth factor-β pathway. Sporadic mutations of SMAD4 are present in 2.1-20.0% of colorectal cancers (CRCs) but data are limited. In this study, we aimed to evaluate clinicopathologic characteristics, prognosis, and clinical outcome associated with this mutation in CRC cases. Data for patients with metastatic or unresectable CRC who underwent genotyping for SMAD4 mutation and received treatment at The University of Texas MD Anderson Cancer Center from 2000 to 2014 were reviewed...
2017: PloS One
https://www.readbyqxmd.com/read/28259994/overexpression-of-wild-type-p21ras-plays-a-prominent-role-in-colorectal-cancer
#11
Shuang Bai, Qiang Feng, Xin-Yan Pan, Hong Zou, Hao-Bin Chen, Peng Wang, Xin-Liang Zhou, Yan-Ling Hong, Shu-Ling Song, Ju-Lun Yang
Colorectal cancer (CRC) is the most common gastrointestinal type of cancer. The overexpression of Ras proteins, particularly p21Ras, are involved in the development of CRC. However, the subtypes of the p21Ras proteins that are overexpressed and the mutation status remain unknown restricting the development of therapeutic antibodies targeting p21Ras proteins. The present study aimed to investigate the mutation status of ras genes associated with Ras proteins that are overexpressed in CRC and explore whether or not wild-type p21Ras could be a target for CRC therapy...
February 21, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28249812/dietary-patterns-and-risk-of-colorectal-cancer-analysis-by-tumor-location-and-molecular-subtypes
#12
Raaj S Mehta, Mingyang Song, Reiko Nishihara, David A Drew, Kana Wu, Zhi Rong Qian, Teresa T Fung, Tsuyoshi Hamada, Yohei Masugi, Annacarolina da Silva, Yan Shi, Wanwan Li, Mancang Gu, Walter C Willett, Charles S Fuchs, Edward L Giovannucci, Shuji Ogino, Andrew T Chan
BACKGROUND & AIMS: Western and prudent dietary patterns have been associated with higher and lower risks of colorectal cancer (CRC), respectively. However, little is known about associations between dietary patterns and specific anatomic subsite or molecular subtypes of CRC. METHODS: We used multivariable Cox proportional hazards models to examine associations between Western and prudent dietary patterns and CRC risk in the Health Professionals Follow-up Study and Nurses' Health Study...
February 26, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28220871/identification-of-mirna-mrna-modules-in-colorectal-cancer-using-rough-hypercuboid-based-supervised-clustering
#13
Sushmita Paul, Petra Lakatos, Arndt Hartmann, Regine Schneider-Stock, Julio Vera
Differences in the expression profiles of miRNAs and mRNAs have been reported in colorectal cancer. Nevertheless, information on important miRNA-mRNA regulatory modules in colorectal cancer is still lacking. In this regard, this study presents an application of the RH-SAC algorithm on miRNA and mRNA expression data for identification of potential miRNA-mRNA modules. First, a set of miRNA rules was generated using the RH-SAC algorithm. The mRNA targets of the selected miRNAs were identified using the miRTarBase database...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28187456/inhibition-and-deficiency-of-the-immunoproteasome-subunit-lmp7-suppress-the-development-and-progression-of-colorectal-carcinoma-in-mice
#14
Julia Koerner, Thomas Brunner, Marcus Groettrup
New treatment options and drug targets for colorectal carcinoma are a pressing medical need. Inflammation and pro-inflammatory cytokines produced by Th1 and Th17 cells like IL-6, TNF, IL-17 and IL-23 promote the development and growth of colorectal cancer (CRC). The immunoproteasome is a proteasome subtype highly expressed in immune cells but also in the intestine. Since the immunoproteasome promotes Th1 and Th17 differentiation and pro-inflammatory cytokine production, we investigated here whether deficiency or inhibition of the immunoproteasome subunit LMP7 would interfere with CRC development and exacerbation in preventive and therapeutic mouse models...
February 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28184012/chromosome-20q-amplification-defines-a-subtype-of-microsatellite-stable-left-sided-colon-cancers-with-wild-type-ras-raf-and-better-overall-survival
#15
Ryan N Ptashkin, Carlos Pagan, Rona Yaeger, Sumit Middha, Jinru Shia, Kevin P O'Rourke, Michael F Berger, Lu Wang, Robert Cimera, Jiajing Wang, David S Klimstra, Leonard Saltz, Marc Ladanyi, Ahmet Zehir, Jaclyn F Hechtman
Here comprehensive analysis was performed on the molecular and clinical features of colorectal carcinoma (CRC) harboring chromosome 20q amplification. Tumor and normal DNA from patients with advanced CRC underwent next generation sequencing (NGS) via MSK-IMPACT and a subset of case samples were subjected to high resolution microarray (Oncoscan). Relationships between genomic copy number and transcript expression were assessed with The Cancer Genome Atlas (TCGA) CRC data. Of the CRC patients sequenced (n=401) with MSK-IMPACT, 148 (37%) had 20q gain, and 30 (7%) had 20q amplification...
February 9, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28161934/identification-of-diverse-adenosine-to-inosine-rna-editing-subtypes-in-colorectal-cancer
#16
Si-Hyun Lee, Hwang-Phill Kim, Jun-Kyu Kang, Sang-Hyun Song, Sae-Won Han, Tae-You Kim
Purpose: RNA editing generates protein diversity by altering RNA sequences in coding regions without changing the overall DNA sequence. Adenosine-to-Inosine (A-to-I) RNA editing events have recently been reported in some types of cancer, but they are rare in human colorectal cancer. Therefore, this study was conducted to identify diverse RNA editing in colorectal cancer. Materials and Methods: We compared transcriptome data of 39 colorectal cancer (CRC) samples and paired adjacent tissues from The Cancer Genome Atlas database to identify RNA editing patterns in CRC, focusing on canonical A-to-I RNA edits in coding sequence regions...
January 25, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28025472/-molecular-classification-of-colorectal-cancers-and-clinical-application
#17
REVIEW
So Yeon Jeon, Won Kyu Kim, Hoguen Kim
The molecular genetics of colorectal cancers (CRCs) is among the best understood of common human cancers. It is difficult to predict the prognosis and/or to predict chemoresponding in CRC patients. At present, prognosis is based predominantly on the tumor stage and pathological examination of the disease. Molecular classification of CRCs, based on genomics and transcriptomics, proposed that CRCs can be classified into at least three-to-six subtypes, depending on the gene expression pattern, and groups of marker genes representing to each subtype have also been reported...
December 25, 2016: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28010901/clinical-relevance-of-colorectal-cancer-molecular-subtypes
#18
REVIEW
Nuria Rodriguez-Salas, Gema Dominguez, Rodrigo Barderas, Marta Mendiola, Xabier García-Albéniz, Juan Maurel, Jaime Feliu Batlle
Colorectal cancer (CRC) is characterized by alteration of critical pathways such TP53 inactivation, BRAF, PI3CA mutations, APC inactivation, KRAS, TGF-β, CTNNB mutations, disregulation of Epithelial to mesnechymal transition (EMT) genes, WNT signaling activation, MYC amplification, and others. Differences in these molecular events results in differences in phenotypic characteristics of CRC, that have been studied and classified by different models of molecular subtypes. It could have potential applications to prognosis, but also to therapeutical approaches of the CRC patients...
January 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28006847/dietary-flavonoid-intake-and-colorectal-cancer-risk-in-the-european-prospective-investigation-into-cancer-and-nutrition-epic-cohort
#19
Raul Zamora-Ros, Dinesh K Barupal, Joseph A Rothwell, Mazda Jenab, Veronika Fedirko, Isabelle Romieu, Krasimira Aleksandrova, Kim Overvad, Cecilie Kyrø, Anne Tjønneland, Aurélie Affret, Mathilde His, Marie-Christine Boutron-Ruault, Verena Katzke, Tilman Kühn, Heiner Boeing, Antonia Trichopoulou, Androniki Naska, Maria Kritikou, Calogero Saieva, Claudia Agnoli, Maria Santucci de Magistris, Rosario Tumino, Francesca Fasanelli, Elisabete Weiderpass, Guri Skeie, Susana Merino, Paula Jakszyn, Maria-José Sánchez, Miren Dorronsoro, Carmen Navarro, Eva Ardanaz, Emily Sonestedt, Ulrika Ericson, Lena Maria Nilsson, Stina Bodén, H Bas Bueno-de-Mesquita, Petra H Peeters, Aurora Perez-Cornago, Nicholas J Wareham, Kay-Thee Khaw, Heinz Freisling, Amanda J Cross, Elio Riboli, Augustin Scalbert
Flavonoids have been shown to inhibit colon cancer cell proliferation in vitro and protect against colorectal carcinogenesis in animal models. However, epidemiological evidence on the potential role of flavonoid intake in colorectal cancer (CRC) development remains sparse and inconsistent. We evaluated the association between dietary intakes of total flavonoids and their subclasses and risk of development of CRC, within the European Prospective Investigation into Cancer and Nutrition (EPIC) study. A cohort of 477,312 adult men and women were recruited in 10 European countries...
December 22, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27995656/the-effects-of-aminosalicylates-or-thiopurines-on-the-risk-of-colorectal-cancer-in-inflammatory-bowel-disease
#20
F Carrat, P Seksik, J-F Colombel, L Peyrin-Biroulet, L Beaugerie
BACKGROUND: Whether aminosalicylates or thiopurines reduce the risk of colorectal cancer (CRC) in inflammatory bowel (IBD) disease is controversial. AIM: To assess simultaneously the chemopreventive effect of aminosalicylates or thiopurines in a case-control study nested in the CESAME observational cohort that enrolled consecutive patients with IBD between May 2004 and June 2005. Patients were followed up to December 2007. METHODS: Study population comprised 144 case patients who developed CRC from the diagnosis of IBD (65 and 79 cases diagnosed, respectively, before and from 2004, starting year of the prospective observational period of CESAME) and 286 controls matched for gender, age, IBD subtype and year of diagnosis, and cumulative extent of colitis...
December 19, 2016: Alimentary Pharmacology & Therapeutics
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