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https://www.readbyqxmd.com/read/29338553/comprehensive-clinicopathologic-and-updated-immunohistochemical-characterization-of-primary-ovarian-mucinous-carcinoma
#1
Dina Bassiouny, Nadia Ismiil, Valerie Dubé, Guangming Han, Matthew Cesari, Fang-I Lu, Elzbieta Slodkowska, Carlos Parra-Herran, Hak Fai Chiu, Magda Naeim, Nim Li, Mahmoud Khalifa, Sharon Nofech-Mozes
The distinction of primary mucinous ovarian carcinoma (PMOC) from other primaries or secondaries is essential for selecting therapeutic options and prognostication. We aimed to characterize the immunohistochemical profile of 36 PMOCs using an extended immunohistochemical panel, with clinicopathologic features and outcome. PAX8 was negative in 30 (83.3%), and SATB2 was negative in 32/35. HNF1B, AMACR, and napsin-A were detected in 33 (91.7%), 35 (97.2%), and 0 (0%), respectively. MMR proteins and ARID1A were retained in 100%; PTEN was lost in 4 (11...
January 1, 2018: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29323889/transmetalation-for-flexible-pendant-armed-schiff-base-macrocyclic-complexes-influenced-by-halide-effects
#2
Fei-Fan Chang, Lei Zhang, Pei-Chen Zhao, Wei Huang
Three 46-membered [2 + 2] pendant-armed Schiff-base macrocyclic dinuclear CdII and CuII complexes (2a, 2b, and 3b) and one 23-membered [1 + 1] CuII macrocycle 4a were prepared from the template-directed condensation reactions between 1,2-bis(2-aminoethoxy)-ethane and extended Cl-dialdehyde in the presence of CdX2 and CuX2 (X = Cl and Br), in which halide effects play important roles in the organization of final macrocyclic complexes in addition to the dominant influence of metal cations. Transmetalation was intensively studied among these CdII and CuII complexes with large and flexible macrocyclic ligands, including two previously synthesized dinuclear ZnII macrocycles (1a and 1b)...
January 11, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29321178/transcription-factor-dependent-anti-repressive-mammalian-enhancers-exclude-h3k27me3-from-extended-genomic-domains
#3
Madhurima Saxena, Adrianna K San Roman, Nicholas K O'Neill, Rita Sulahian, Unmesh Jadhav, Ramesh A Shivdasani
Compacted chromatin and nucleosomes are known barriers to gene expression; the nature and relative importance of other transcriptional constraints remain unclear, especially at distant enhancers. Polycomb repressor complex 2 (PRC2) places the histone mark H3K27me3 predominantly at promoters, where its silencing activity is well documented. In adult tissues, enhancers lack H3K27me3, and it is unknown whether intergenic H3K27me3 deposits affect nearby genes. In primary intestinal villus cells, we identified hundreds of tissue-restricted enhancers that require the transcription factor (TF) CDX2 to prevent the incursion of H3K27me3 from adjoining areas of elevated basal marking into large well-demarcated genome domains...
January 10, 2018: Genes & Development
https://www.readbyqxmd.com/read/29317235/differentiating-breast-carcinoma-with-signet-ring-features-from-gastrointestinal-signet-ring-carcinoma-assessment-of-immunohistochemical-markers
#4
Yiang Hui, Yihong Wang, Gahie Nam, Jacqueline Fanion, Ashlee Sturtevant, Kara A Lombardo, Murray B Resnick
Signet-ring morphology is recognized throughout the gastrointestinal tract. However, this pattern may be observed in other primary sites giving rise to diagnostic challenges in the work-up of metastases. Relatively newer immunohistochemical markers have not been evaluated in this context. We assessed expression patterns of several common immunohistochemical markers in tumors with signet-ring morphology to delineate a pragmatic approach to this differential diagnosis. Primary breast and gastrointestinal carcinomas showing signet-ring features were reviewed...
January 6, 2018: Human Pathology
https://www.readbyqxmd.com/read/29307626/histologic-and-immunohistochemical-differences-between-hereditary-and-sporadic-diffuse-gastric-carcinoma
#5
Hee Eun Lee, Thomas C Smyrk, Lizhi Zhang
We aimed to identify histopathologic features unique in hereditary diffuse gastric cancer (HDGC) by comparing with its sporadic counterpart (SDGC). 11 patients with confirmed CDH1 mutation who were found to have HDGC in a prophylactic total gastrectomy were collected. Median age of HDGC patients was 39 years (range 24-57). All HDGC cases had intramucosal signet ring cell carcinoma. Twenty-three invasive tumor foci from 7 patients with HDGC were available for ancillary studies, and we evaluated each focus separately...
January 4, 2018: Human Pathology
https://www.readbyqxmd.com/read/29307199/pathologic-classification-of-pancreatic-cancers-current-concepts-and-challenges
#6
Mohamed E Mostafa, Ipek Erbarut-Seven, Burcin Pehlivanoglu, Volkan Adsay
As the most common and most important cancer of the pancreas, with rapid mortality and now also as the third leading cause of cancer-related deaths in the United States, pancreatic ductal adenocarcinoma (PDAC) has become synonymous with "pancreas cancer". PDAC is also the prototype of the "pancreatobiliary-type" adenocarcinomas, along the biliary tract, ampullary and gallbladder cancers with the similar morphology and behavior. Recent molecular profiling studies have identified distinct subsets of PDAC, potentially with different behaviors and targetability...
December 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/29303055/yap-is-decreased-in-preeclampsia-and-regulates-invasion-and-apoptosis-of-htr-8-svneo
#7
Man Sun, Quan Na, Ling Huang, Guiyu Song, Feng Jin, Yuanyuan Li, Yue Hou, Danyang Kang, Chong Qiao
Preeclampsia (PE) is a gestational disorder with hypertension and proteinuria leading to maternal and fetal morbidity and mortality. Yes-associated protein (YAP), a transcription coactivator of Hippo pathway, was identified as an oncoprotein participated in tumorigenesis. However, the effect of YAP on trophoblast has not been investigated. In our study, YAP expression levels in first-trimester, full-term, and PE placentas were detected using quantitative real-time polymerase chain reaction (PCR), Western blot assays, and immunohistochemistry...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29285861/biliary-versus-thyroid-like-a-tale-of-two-morphologies
#8
Sharon J Song, Kathleen Montone, Kristen Stashek, Rashmi Tondon
Pictured here is a portacaval lymph node biopsy from a 72-year-old man with an 11.9 cm liver mass and several enlarged surrounding lymph nodes. The node was involved by a tumor with two distinct morphologies-one area resembling a primary pancreaticobiliary tumor (Figure 1) and another mimicking a thyroid follicular carcinoma with microfollicles containing brightly eosinophilic, colloid-like secretions (Figure 2). Immunohistochemistry showed the neoplastic cells to stain strongly with CK7 and CK19, with patchy positivity for CK20...
December 28, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/29281831/degree-of-tissue-differentiation-dictates-susceptibility-to-braf-driven-colorectal-cancer
#9
Kevin Tong, Oscar Pellón-Cárdenas, Veerin R Sirihorachai, Bailey N Warder, Om A Kothari, Ansu O Perekatt, Emily E Fokas, Robert L Fullem, Anbo Zhou, Joshua K Thackray, Hiep Tran, Lanjing Zhang, Jinchuan Xing, Michael P Verzi
Oncogenic mutations in BRAF are believed to initiate serrated colorectal cancers; however, the mechanisms of BRAF-driven colon cancer are unclear. We find that oncogenic BRAF paradoxically suppresses stem cell renewal and instead promotes differentiation. Correspondingly, tumor formation is inefficient in BRAF-driven mouse models of colon cancer. By reducing levels of differentiation via genetic manipulation of either of two distinct differentiation-promoting factors (Smad4 or Cdx2), stem cell activity is restored in BRAFV600E intestines, and the oncogenic capacity of BRAFV600E is amplified...
December 26, 2017: Cell Reports
https://www.readbyqxmd.com/read/29250690/difficulty-in-positive-diagnosis-of-ascites-and-in-differential-diagnosis-of-a-pulmonary-tumor
#10
Mircea Cătălin ForŢofoiu, Dragoş Marian Popescu, Vlad Pădureanu, Aurelian Constantin Dobrinescu, Adrian Gabriel Dobrinescu, Adrian Mită, Maria Camelia Foarfă, Violeta Serenada Bălă, Anca Emanuela Muşetescu, Nina Ionovici, Maria ForŢofoiu
Ascites is the most frequent complication of cirrhosis and occurs only when the portal hypertension has already installed but ascites is caused by neoplasms, heart failure, tuberculosis, pancreatic illnesses, as well as other kind of affections. We describe the case of a 67-year-old patient, a retired person, without significant personal or familial history, nonsmoker, infrequent alcohol and coffee consumer with following chief complaints at onset: loss of appetite, weight loss, serious physical asthenia, delayed intestinal transit, diffuse abdominal pain and increase of abdominal circumference...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29244230/an-extremely-rare-case-of-epstein-barr-virus-associated-gastric-carcinoma-with-differentiation-to-neuroendocrine-carcinoma
#11
Ai Shimizu, Toshiyuki Takahashi, Ryoji Kushima, Kazuhiro Sentani, Wataru Yasui, Yoshihiro Matsuno
Epstein-Barr virus (EBV)-associated gastric carcinoma (EBVGC) is defined as a neoplasm comprising monoclonal proliferation of EBV-infected gastric epithelial cells. Although the typical histology is gastric carcinoma with lymphoid stroma (GCLS), the histologic features of the tumor vary. We report herein the case of a 78-year-old man with multiple simultaneous EBVGCs revealing different histopathologic morphologies; one was mixed adenoneuroendocrine carcinoma (MANEC), and the other was GCLS. Both tumor types exhibited positive results for EBV in situ hybridization...
December 15, 2017: Pathology International
https://www.readbyqxmd.com/read/29241727/simple-classifiers-for-molecular-subtypes-of-colorectal-cancer
#12
Woo Gyeong Kim, Joo Yeon Kim, Do Youn Park
BACKGROUND AND STUDY AIM: Colorectal cancer (CRC) is a heterogeneous disease entity with a diverse biological pathogenesis. This study aims to validate the two studies published in 2013 which established a separate CRC molecular subtype classification by utilizing a rapidly accessible miniclassifier, and verify a simplified version thereof. PATIENTS AND METHODS: Participants diagnosed with CRC (n = 568) were subtyped in three classifications for characteristic, and prognostic purposes...
December 11, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/29238580/endometrioid-adenocarcinoma-arising-from-colon-endometriosis
#13
Viktoria-Varvara Palla, Georgios Karaolanis, Theodora Bliona, Ioannis Katafigiotis, Ioannis Anastasiou, Demetrios Hassiakos
Endometriosis-associated intestinal tumors represent the malignant transformation of gastrointestinal endometriosis. Approximately 50 cases have been reported in the literature. They are most commonly found among women aged 30-60 years, whereas exogenous hormone therapy and obesity are primary risk factors for the malignant transformation of endometriotic lesions. Clinical features simulate a primary colonic carcinoma. A high index of suspicion in conjunction with careful histological and immunohistochemical examination (CK7, CK20, CDX2, CD10, ER, and PR) is important for establishing a correct diagnosis...
2017: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29232767/a-comparative-immunohistochemical-study-of-anal-canal-epithelium-in-humans-and-swine-focusing-on-the-anal-transitional-zone-epithelium-and-the-anal-glands
#14
Futoshi Muranaka, Tomoyuki Nakajima, Mai Iwaya, Keiko Ishii, Kayoko Higuchi, Naoko Ogiwara, Shinichi Miyagawa, Hiroyoshi Ota
To better understand the cellular origins and differentiation of anal canal epithelial neoplasms, the immunohistochemical profiles of the anal canal epithelium in humans and swine were evaluated. Formalin-fixed tissue sections were immunostained for mucin (MUC: MUC2, MUC5AC, MUC5B), desmoglein 3 (DGS3), p63, CDX2, SOX2, and α-smooth muscle actin (α-SMA). The anal transitional zone (ATZ) epithelium covered the anal sinus and consisted of a stratified epithelium with mucous cells interspersed within the surface lining...
December 12, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29228157/gut-epithelial-vitamin-d-receptor-regulates-microbiota-dependent-mucosal-inflammation-by-suppressing-intestinal-epithelial-cell-apoptosis
#15
Lei He, Tianjing Liu, Yongyan Shi, Feng Tian, Huiyuan Hu, Dilip K Deb, Yinyin Chen, Marc Bissonnette, Yan Chun Li
Recent studies show that colonic vitamin D receptor (VDR) signaling protects the mucosal epithelial barrier and suppresses colonic inflammation, but the underlying molecular mechanism remains to be fully understood. To investigate the implication of colonic VDR down-regulation seen in patients with inflammatory bowel disease, we assessed the effect of gut epithelial VDR deletion on colonic inflammatory responses in an experimental colitis model. In 2,4,6-trinitrobenzenesulfonic acid (TNBS)-induced colitis model, mice carrying VDR deletion in gut epithelial cells (VDRf/f;Villin-Cre or VDRΔIEC) or in colonic epithelial cells (VDRf/f;CDX2-Cre or VDRΔCEC) developed more severe clinical colitis than VDRf/f control mice, characterized by more robust TH1 and TH17 responses, with greater increases in mucosal IFN-γ+, IL-17+ and IFN-γ+IL-17+ T cells...
December 7, 2017: Endocrinology
https://www.readbyqxmd.com/read/29228123/role-of-yes-associated-protein-1-angiomotin-and-mitogen-activated-kinase-kinase-1-2-in-development-of-the-bovine-blastocyst
#16
Verónica M Negrón-Pérez, Peter J Hansen
The morula-stage embryo is transformed into a blastocyst composed of epiblast, hypoblast and trophectoderm (TE) through mechanisms that, at least in the mouse, involve the Hippo signaling and mitogen-activated kinase (MAPK) pathways. Using the cow as an additional model, we tested the hypotheses that TE and hypoblast differentiation were regulated by the Hippo pathway regulators, YAP1 and AMOT, and MAPK kinase 1/2 (MAPK1/2). The presence of YAP1 and CDX2 in the nucleus and cytoplasm of MII oocytes and embryos was evaluated by immunofluorescence labeling...
December 8, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29220096/hepatic-progenitor-cells-in-metastatic-liver-carcinomas
#17
Ioanna Delladetsima, Stratigoula Sakellariou, Olivier Govaere, Elpida Poulaki, Evangelos Felekouras, Dina Tiniakos
AIMS: Hepatic progenitor cells (HPCs) are activated in various liver diseases but their role in carcinomatous environment remains unknown. We aimed to identify the possible presence and topography of HPCs in liver metastases. METHODS: We examined 14 liver resection specimens for colorectal adenocarcinoma (CRC) (n=13) and anal squamous cell carcinoma (SCC) (n=1) metastases. Immunohistochemical markers of colonic (keratin 20-K20, CDX2) and squamous cell origin (p63), HPC (K19, CD56) and stem cell (CD44) markers, and the biliary marker K7 which may also highlight HPCs were applied on routinely processed tissue sections...
December 8, 2017: Histopathology
https://www.readbyqxmd.com/read/29215765/helicobacter-pylori-induces-cdx2-and-cox2-expression-by-modulating-micrornas-in-esophageal-epithelial-cells
#18
Guigen Teng, Yun Dai, Yunxiang Chu, Jing Li, Hongchen Zhang, Ting Wu, Xiaowei Shuai, Weihong Wang
Dysregulation of microRNAs (miRNAs) has been linked to virulence factors of Helicobacter pylori (H. pylori). The role of H. pylori in esophageal disease has not been clearly defined. We previously reported that H. pylori-esophageal colonization promotes the incidence of Barrett's esophagus and esophageal adenocarcinoma in vivo. Here, we studied the direct effects of H. pylori on the transformation of esophageal epithelial cells, with particular focus on whether H. pylori exerts its effects by modulating miRNAs and their downstream target genes...
December 7, 2017: Cancer Science
https://www.readbyqxmd.com/read/29214996/the-role-of-cdx2-as-a-lineage-specific-transcriptional-repressor-for-pluripotent-network-during-the-first-developmental-cell-lineage-segregation
#19
Daosheng Huang, Guoji Guo, Ping Yuan, Amy Ralston, Lingang Sun, Mikael Huss, Tapan Mistri, Luca Pinello, Huck Hui Ng, Guocheng Yuan, Junfeng Ji, Janet Rossant, Paul Robson, Xiaoping Han
The first cellular differentiation event in mouse development leads to the formation of the blastocyst consisting of the inner cell mass (ICM) and trophectoderm (TE). The transcription factor CDX2 is required for proper TE specification, where it promotes expression of TE genes, and represses expression of Pou5f1 (OCT4). However its downstream network in the developing embryo is not fully characterized. Here, we performed high-throughput single embryo qPCR analysis in Cdx2 null embryos to identify CDX2-regulated targets in vivo...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29198708/knockdown-of-laminin-%C3%AE-5-stimulates-intestinal-cell-differentiation
#20
Manon Lepage, Amira Seltana, Marie-Pier Thibault, Éric Tremblay, Jean-François Beaulieu
Interactions between cells and the extracellular matrix regulate a wide range of cell processes such as proliferation and differentiation. Laminins are major components of the basement membrane that actively participate in most biological functions via their interactions with a variety of specific cell receptors. The α5-containing laminins (LAMA5) are one of the three main types of laminins identified at the epithelial basal lamina in the adult intestine. The aim of the present study was to investigate the role of α5-containing laminins on intestinal cell proliferation and differentiation...
November 30, 2017: Biochemical and Biophysical Research Communications
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