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https://www.readbyqxmd.com/read/28914964/clinicopathological-and-molecular-implications-of-aberrant-ttf-1-expression-in-colorectal-carcinomas-an-immunohistochemical-analysis-of-1-319-cases-using-three-different-antibody-clones
#1
Jeong Mo Bae, Jung Ho Kim, Jeong Hwan Park, Hye Eun Park, Nam-Yun Cho, Gyeong Hoon Kang
AIMS: The precise profile of aberrant expression of thyroid transcription factor-1 (TTF-1) according to antibody clones in colorectal carcinomas (CRCs) has been controversial. Moreover, the detailed clinicopathological and molecular features of CRCs with TTF-1 expression have rarely been investigated. Here, we evaluated the TTF-1 expression status in a large series of CRC cases using three different antibody clones. METHODS AND RESULTS: Immunohistochemistry for TTF-1 using clones 8G7G3/1, SPT24, and SP141 was performed on tumour tissues of 1,319 primary CRCs and 98 corresponding metastatic lesions...
September 15, 2017: Histopathology
https://www.readbyqxmd.com/read/28914716/diagnostic-utility-of-satb2-in-metastatic-krukenberg-tumors-of-the-ovary-an-immunohistochemical-study-of-70-cases-with-comparison-to-cdx2-ck7-ck20-chromogranin-and-synaptophysin
#2
Chen Yang, Li Sun, Lingxin Zhang, Lixin Zhou, Ming Zhao, Yan Peng, Dongfeng Niu, Zhongwu Li, Xiaozheng Huang, Qiang Kang, Lin Jia, Jinping Lai, Dengfeng Cao
SATB2 is a sensitive marker for colorectal adenocarcinomas. No study has investigated its diagnostic utility in metastatic Krukenberg tumors (MKTs) of the ovary. Here we performed immunohistochemical staining SATB2 in 70 MKTs of various origins (stomach 27, colorectum 13, appendix 20 including 19 metastatic adenocarcinomas ex goblet cell carcinoids [AdexGCC] and 1 conventional poorly differentiated carcinoma with signet ring cells, breast 5, bladder 3, lung 2) to assess its diagnostic utility. We also compared SATB2 with CDX2, CK7, CK20, chromogranin, and synaptophysin in MKTs of gastric origin (MKTs-stomach), those of colorectal origin (MKTs-colorectum) and those due to appendiceal AdexGCCs (MKT-AdexGCCs) for their sensitivity and specificity to distinguish these tumors...
September 13, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28911212/apposition-to-endometrial-epithelial-cells-activates-mouse-blastocysts-for-implantation
#3
Peter T Ruane, Stéphane C Berneau, Rebekka Koeck, Jessica Watts, Susan J Kimber, Daniel R Brison, Melissa Westwood, John D Aplin
STUDY QUESTION: How do interactions between blastocyst-stage embryos and endometrial epithelial cells regulate the early stages of implantation in an in vitro model? SUMMARY ANSWER: Mouse blastocyst apposition with human endometrial epithelial cells initiates trophectoderm differentiation to trophoblast, which goes on to breach the endometrial epithelium. WHAT IS KNOWN ALREADY: In vitro models using mouse blastocysts and human endometrial cell lines have proven invaluable in the molecular characterisation of embryo attachment to endometrial epithelium at the onset of implantation...
September 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28872768/skene-s-gland-adenocarcinoma-with-intestinal-differentiation-a-case-report-and-literature-review
#4
Mariko Muto, Kentaro Inamura, Naoko Ozawa, Takashi Endo, Hitoshi Masuda, Junji Yonese, Yuichi Ishikawa
Adenocarcinoma of Skene's gland (the female homolog to the male prostate) is extremely rare, with only a few cases reported. We present a case of Skene's gland adenocarcinoma with intestinal differentiation. The patient was a 69-year-old Japanese woman who was operated on for a recurrent tumor of the external ostium of the urethra. Histopathologically, the tumor showed glandular and cribriform patterns with a signet-ring cell component in a mucus lake. Immunohistochemically, the tumor cells were positive for prostate specific acid phosphatase (PSAP), and AMACR, and negative for Nkx3...
September 5, 2017: Pathology International
https://www.readbyqxmd.com/read/28863999/isolation-and-characterization-of-the-trophectoderm-from-the-arabian-camel-camelus-dromedarius
#5
Islam M Saadeldin, Ayman Abdel-Aziz Swelum, Mona Elsafadi, Abdullah F Moumen, Faisal A Alzahrani, Amer Mahmood, Musaad Alfayez, Abdullah N Alowaimer
We isolated and characterized trophoblast from in vivo-derived camel embryos and compared with embryonic stem-like cells. Camel embryos were flushed on day 8 post-insemination and used to derive trophectoderm and embryonic stem-like cells under feeder-free culture conditions using a basement membrane matrix. Embryos were evaluated for the expression of POU5F1, MYC, KLF4, SOX2, CDX2, and KRT8 mRNA transcripts by relative quantitative polymerase chain reaction. Camel embryos grew and expanded to ∼4.5 mm and maintained their vesicular shape in vitro for 21 days post-insemination...
September 2017: Placenta
https://www.readbyqxmd.com/read/28862703/fine-tuning-and-autoregulation-of-the-intestinal-determinant-and-tumor-suppressor-homeobox-gene-cdx2-by-alternative-splicing
#6
Camille Balbinot, Marie Vanier, Olivier Armant, Asmaa Nair, Julien Penichon, Christine Soret, Elisabeth Martin, Thoueiba Saandi, Jean-Marie Reimund, Jacqueline Deschamps, Felix Beck, Claire Domon-Dell, Isabelle Gross, Isabelle Duluc, Jean-Noël Freund
On the basis of phylogenetic analyses, we uncovered a variant of the CDX2 homeobox gene, a major regulator of the development and homeostasis of the gut epithelium, also involved in cancer. This variant, miniCDX2, is generated by alternative splicing coupled to alternative translation initiation, and contains the DNA-binding homeodomain but is devoid of transactivation domain. It is predominantly expressed in crypt cells, whereas the CDX2 protein is present in crypt cells but also in differentiated villous cells...
September 1, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28862203/utility-of-cell-block-to-detect-malignancy-in-fluid-cytology-adjunct-or-necessity
#7
Sumedha Dey, Dipanwita Nag, Ayandip Nandi, Ranjana Bandyopadhyay
AIM OF THE STUDY: Cell block (CB) technique when supplemented with conventional smear, provides increased cellularity, preservation of architectural pattern with excellent morphology, and a clear background. We compare the utility of CB technique compared to conventional smear in detection of malignancy in serous effusions. MATERIALS AND METHODS: An institution-based observational and analytical study was carried out over 1 year on 50 patients with effusions. The residual amount of centrifuged deposit after preparation of conventional smear was mixed with 10% alcohol-formalin solution, and CBs were prepared...
July 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28859285/bovine-lineage-specification-revealed-by-single-cell-gene-expression-analysis-from-zygote-to-blastocyst
#8
Qingqing Wei, Liang Zhong, Shaopeng Zhang, Haiyuan Mu, Jinzhu Xiang, Liang Yue, Yunping Dai, Jianyong Han
Preimplantation embryos undergo zygotic genome activation and lineage specification resulting in three distinct cell types in the late blastocyst. The molecular mechanisms underlying this progress are largely unknown in bovines. Here, we sought to analyze an extensive set of regulators at the single-cell level to define the events involved in the development of the bovine blastocyst. Using a quantitative microfluidics approach in single cells, we analyzed mRNA levels of 96 genes known to function in early embryonic development and maintenance of stem cell pluripotency in parallel in 384 individual cells from bovine preimplantation embryos...
July 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28836411/evidence-of-oocyte-polarity-in-bovine-implications-for-intracytoplasmic-sperm-injection-and-somatic-cell-nuclear-transfer
#9
Seyed Morteza Hosseini, Fariba Moulavi, Nima TanhaieVash, Naser Shams-Esfandabadi, Mohammad Hossein Nasr-Esfahani, Abolfazl Shirazi
OBJECTIVES: We recently demonstrated spatial regionalization of maternal transcripts and proteins within unfertilized ovine oocyte. Here, we investigated the likelihood of oocyte polarity for the first time in bovine. MATERIALS AND METHODS: In this experimental study, in vitro matured bovine oocytes were used for manual bisection [into oocyte halve that were near-to (HNS) and far-from (FS) spindle] or trisection [into MII-spindle (S), the spindle-side half (NS), and the distal half unassociated with the spindle (FS)]...
October 2017: Cell Journal
https://www.readbyqxmd.com/read/28819729/prognostic-significance-of-cdx2-immunoexpression-in-poorly-differentiated-clusters-of-colorectal-carcinoma
#10
Luca Reggiani Bonetti, Simona Lionti, Enrica Vitarelli, Valeria Barresi
CDX2 is a transcription factor that acts as a tumor suppressor in colorectal cancer (CRC). Its loss triggers metastatic process and tumor progression; however, its prognostic role in patients with CRC is still controversial. Poorly differentiated clusters (PDCs) are aggregates of neoplastic cells which likely have high metastatic potential in CRC. In this study, we analyzed and compared CDX2 expression in PDC (CDX2-PDC) and corresponding main tumor (CDX2 main tumor) in 42 CRCs showing at least 10 PDC (PDC G3)...
August 17, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28814615/single-cell-gene-expression-of-the-bovine-blastocyst
#11
Veronica M Negrón-Pérez, Yanping Zhang, Peter J Hansen
The first two differentiation events in the blastocyst result in three cell types - epiblast, trophectoderm (TE), and hypoblast. The purpose here was to identify molecular markers for each cell type in the bovine and evaluate differences in gene expression among individual cells of each lineage. The cDNA from 67 individual cells from dissociated blastocysts was used to determine transcript abundance for 96 genes implicated as cell lineage markers in other species or potentially involved in developmental processes...
August 16, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28811946/are-all-mutations-the-same-a-rare-case-report-of-coexisting-mutually-exclusive-kras-and-braf-mutations-in-a-patient-with-metastatic-colon-adenocarcinoma
#12
Anusha Vittal, Akshay Middinti, Anup Kasi Loknath Kumar
29-year-old Hispanic woman presented to the clinic with complaints of abdominal pain, nausea, fatigue, and constipation. Laboratory tests indicated the presence of iron deficiency anemia and transaminitis. Imaging evaluation revealed marked hepatomegaly with multiple hepatic metastases and pelvic lymphadenopathy. Biopsy of the hepatic lesions showed adenocarcinoma positive for pan-cytokeratin, CMA5.2, villin, and CDX2. She was positive for tumor markers CA 19-9, CA-125, and CEA. Upon further evaluation, she was found to have colorectal cancer positive for KRAS and BRAF mutations...
2017: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/28807490/fabp1-and-hepar-expression-levels-in-barrett-s-esophagus-and-associated-neoplasia-in-an-asian-population
#13
Supriya Srivastava, Florian Kern, Neel Sharma, Frank McKeon, Wa Xian, Khay Guan Yeoh, Khek Yu Ho, Ming Teh
INTRODUCTION: Barrett's esophagus (BE) is a premalignant condition associated with esophageal adenocarcinoma (EAC). Evidence highlights that EAC is associated with an estimated 5-year survival of approximately 10-15%. Therefore, there is a need to determine which biomarkers are of value in the diagnosis of BE and beyond. The aim of our study was to evaluate the clinical significance of markers known to be expressed across BE and associated neoplasia. METHODS: Retrospective tissues were obtained from columnar lined esophagus (CLE) without goblet cells (n=22), BE (n=29), dysplasia (n=14), and EAC (n=10)...
July 27, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28777098/carcinoid-arising-from-the-teratomatous-bronchial-mucosa-in-a-mature-cystic-teratoma-of-the-ovary-a-case-report
#14
Dongfeng Niu, Zhongwu Li, Li Sun, Dengfeng Cao
Primary ovarian carcinoids are relatively uncommon, either pure (monodermal teratomas) or in association with mature cystic teratomas. Here we reported a unique case of carcinoid arising from the teratomatous bronchial mucosa in an ovarian mature cystic teratoma in a 22-year-old woman. This tumor showed compact trabecular and nested growth pattern with salt-and-pepper chromatin pattern. Mitotic figures were identified (6/10 high power fields) and focal necrosis was present. Immunohistochemically the tumor cells were diffusely positive for TTF1 and CD56, focally positive for synaptophysin, and negative for chromogranin A and CDX2...
August 2, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28767705/changes-in-chromosome-territory-position-within-the-nucleus-reflect-alternations-in-gene-expression-related-to-embryonic-lineage-specification
#15
Maciej Orsztynowicz, Dorota Lechniak, Piotr Pawlak, Beata Kociucka, Svatava Kubickova, Halina Cernohorska, Zofia Eliza Madeja
Loss of totipotentcy in an early embryo is directed by molecular processes responsible for cell fate decisions. Three dimensional genome organisation is an important factor linking chromatin architecture with stage specific gene expression patterns. Little is known about the role of chromosome organisation in gene expression regulation of lineage specific factors in mammalian embryos. Using bovine embryos as a model we have described these interactions at key developmental stages. Three bovine chromosomes (BTA) that differ in size, number of carried genes, and contain loci for key lineage regulators OCT4, NANOG and CDX2, were investigated...
2017: PloS One
https://www.readbyqxmd.com/read/28748455/resection-of-rectal-cancer-resembling-submucosal-tumor-that-was-preoperatively-diagnosed-with-endoscopic-ultrasound-guided-biopsy
#16
Akimitsu Tanio, Hiroaki Saito, Keigo Ashida, Shouichi Urushibara, Manabu Yamamoto, Naruo Tokuyasu, Teruhisa Sakamoto, Soichiro Honjo, Yoshihiko Maeta, Yoshiyuki Fujiwara
BACKGROUND: Colorectal cancer (CRC) resembling submucosal tumor (SMT; CRC/SMT) is very rare. Because its biopsy is challenging, accurate preoperative diagnosis is also very rare. CASE PRESENTATION: A 55-year-old woman with a high serum carcinoembryonic antigen level underwent a computed tomography colonoscopy, which showed extrinsic rectum compression. A coronal magnetic resonance image showed a 4-cm low-intensity tumor between her rectum and sacrum. Endoscopic ultrasound (EUS) showed a 30-mm low-echoic lesion originating from the rectum...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28731197/metastatic-gallbladder-carcinoma-in-meningioma-a-case-report
#17
Burak Eren, Feyza Karagoz Guzey, Ilker Gulec, Azmi Tufan
Metastases from tumors to systemic cancers are rare. The most common intracranial recipient tumor is meningioma. Metastasis from gallbladder cancer has been previously reported from only one patient during autopsy. We present the case of a 72-year-old woman who underwent surgery for right frontal skull base meningioma.The tumor was completely removed. Histological specimens showed gallbladder carcinomatous metastasis with diffuse neuroendocrine differentiation in meningothelial meningioma. The Ki-67 proliferation index of the meningioma was 3%...
June 2, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28711650/role-of-satb2-in-distinguishing-the-site-of-origin-in-glandular-lesions-of-the-bladder-urinary-tract
#18
Giovanna Angela Giannico, Allen M Gown, Jonathan I Epstein, Frank Revetta, Justin A Bishop
The differential diagnosis of glandular lesions of the bladder/urinary tract can be challenging due to significant morphologic and immunohistochemical overlap between primary lesions and metastasis/direct extension from adjacent organs. Special AT-rich sequence-binding protein 2 (SATB2), encoded on chromosome 2q32-33, is a recently described DNA-binding protein involved in osteoblast lineage commitment and expressed in colorectal and appendiceal neoplasms. In this study, we hypothesized that immunohistochemistry for SATB2 may be of value in distinguishing primary adenocarcinoma of the bladder/urinary tract and urothelial carcinoma with glandular differentiation from gastrointestinal and endocervical primaries...
July 12, 2017: Human Pathology
https://www.readbyqxmd.com/read/28704186/comparative-characteristics-of-napsin-a-ttf-1-and-egfr-mutation-expression-in-mucinous-lung-cell-carcinomas
#19
Sylvia N Genova, Veselin T Belovezhdov, Stoyan N Bichev, Vladimir H Danev
BACKGROUND: Invasive mucinous lung adenocarcinomas are rare and account for 2%-10% of all lung adenocarcinoma cases. It is believed that Napsin A exhibits a weaker expression in mucinous adenocarcinomas compared with TTF1, but such correlation is still poorly researched. AIM: The aim of the study was to determine the frequency of mucinous to nonmucinous adenocarcinomas and compare specificity and sensitivity of monoclonal Napsin A with TTF1 in mucinous adenocarcinomas and define the frequency of EGFR mutations...
June 1, 2017: Folia Medica
https://www.readbyqxmd.com/read/28662703/the-diagnosis-of-a-metastatic-breast-tumor-from-ovarian-cancer-by-the-succession-of-a-p53-mutation-a-case-report
#20
Ryutaro Mori, Manabu Futamura, Kasumi Morimitsu, Chiemi Saigo, Tatsuhiko Miyazaki, Kazuhiro Yoshida
BACKGROUND: Metastatic breast tumors from other organs are very rare. We herein describe the case of a patient with a metastatic breast tumor due to ovarian cancer who was diagnosed by the succession of a p53 mutation. CASE PRESENTATION: The patient was a 59-year-old woman with sigmoid colon stenosis. Diagnostic imaging revealed a pelvic mass, multiple liver tumors, ascites, and multiple swollen para-aortic lymph nodes, suggesting an advanced ovarian tumor. Transverse loop colostomy and partial resection of the greater omentum was performed followed by six cycles of paclitaxel with carboplatin chemotherapy (TC therapy)...
June 29, 2017: World Journal of Surgical Oncology
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