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https://www.readbyqxmd.com/read/29707131/gene-expression-analyses-determine-two-different-subpopulations-in-kit-negative-gist-like-kngl-patients
#1
David S Moura, Rafael Ramos, Antonio Fernandez-Serra, Teresa Serrano, Julia Cruz, Ramiro Alvarez-Alegret, Rosa Ortiz-Duran, Luis Vicioso, Maria Luisa Gomez-Dorronsoro, Xavier Garcia Del Muro, Javier Martinez-Trufero, Jordi Rubio-Casadevall, Isabel Sevilla, Nuria Lainez, Antonio Gutierrez, Cesar Serrano, Maria Lopez-Alvarez, Nadia Hindi, Miguel Taron, José Antonio López-Guerrero, Javier Martin-Broto
Introduction: There are limited findings available on KIT-negative GIST-like (KNGL) population. Also, KIT expression may be post-transcriptionally regulated by miRNA221 and miRNA222. Hence, the aim of this study is to characterize KNGL population, by differential gene expression, and to analyze miRNA221/222 expression and their prognostic value in KNGL patients. Methods: KIT , PDGFRA , DOG1 , IGF1R , MIR221 and MIR222 expression levels were determined by qRT-PCR...
April 3, 2018: Oncotarget
https://www.readbyqxmd.com/read/29701795/dog-loci-revealed-after-eppo-accelerated-seed-dormancy-release
#2
Gonda Buijs, Jan Kodde, Steven P C Groot, Leónie Bentsink
Seed dormancy determines the timing of seed germination. It may be released by dry storage, also referred to as after-ripening. Studies on dormancy release mechanisms are often hampered by the long after-ripening requirements of seeds. After-ripening is thought to be mainly caused by oxidative processes during seed dry storage. These oxidative processes are also the main cause of seed ageing. Increasing partial oxygen pressure through the EPPO (Elevated Partial Pressure of Oxygen) system, has been shown to mimic and accelerate dry seed ageing...
April 26, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29690664/-clinicopathologic-features-of-gastric-plexiform-fibromyxoma
#3
G M Hu, H P Chen, Q Y Liu, X C Shi, H F Wu, Y K Feng, J L Ren, C F Wang
Objective: To analyse the clinicopathologic features of gastric plexiform fibromyxoma (PF) including diagnosis, differential diagnosis, immunohistochemistry and molecular pathology. Methods: Eight cases of PF were collected from June 2006 to June 2017 at the Second Affiliated Hospital of Zhengzhou University and the First Affiliated Hospital of Zhengzhou University. The clinicopathologic findings of eight cases of PF were retrospectively analyzed, and immunohistochemistry (EnVision method) and molecular detection of glioma-associated oncogene homologue 1 (GLI1) gene translocation were performed...
April 8, 2018: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29671211/characterisation-of-dog-1-expression-in-salivary-gland-tumours-and-comparison-with-myoepithelial-markers
#4
Syed A Khurram, Paul M Speight
DOG1 is an established diagnostic marker for gastrointestinal stromal tumours (GIST), but has been reported in salivary gland tumours (SGT) as an acinar and intercalated duct marker. However, its specificity and distribution is not well established. The aim of this study was to evaluate the diagnostic utility of DOG-1 expression in SGT in addition to comparing it with myoepithelial markers. Normal salivary tissue and SGT (n = 184) were examined for expression of DOG1 and a range of myoepithelial markers...
April 18, 2018: Head and Neck Pathology
https://www.readbyqxmd.com/read/29533280/polymorphous-sweat-gland-carcinoma-an-immunohistochemical-and-molecular-study
#5
Shira Ronen, Irene Aguilera-Barrantes, Tamara Giorgadze, Petr Šteiner, Petr Grossmann, Saul Suster
Polymorphous sweat gland carcinoma is an uncommon low-grade malignant adnexal tumor with a marked predilection for the distal extremities. Histologically, the lesions are characterized by a cellular proliferation showing a combination of growth patterns, including trabecular, solid, tubular, cribriform, or adenoid cystic and pseudopapillary. The immunohistochemical and molecular profile of these tumors has not yet been properly addressed. We have studied 3 cases of polymorphous sweat gland carcinoma using a broad panel of immunohistochemical markers including cytokeratin AE1/AE3, CK5/6, MOC31, p40, p63, p16, chromogranin, synaptophysin, CD56, MIB-1, estrogen receptor, progesterone receptor, androgen receptor, BER-EP4, smooth muscle actin, epithelial membrane antigen, carcinoembryonic antigen, CD117, S100 protein, HBME-1, DOG1, vimentin, and mammaglobin...
March 6, 2018: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29507015/the-mass-effect-of-a-slowly-growing-gist
#6
Deepali Prakash, Leandro Siragusa, Saj Wajed, Antonio Manzelli
Gastrointestinal stromal tumours (GISTs) are typically defined as solid masses arising from the GI tract, most commonly from the stomach and small intestine. They seldom present in a cystic form. Management of cystic masses arising from the GI tract may pose a diagnostic predicament. We had one such case that presented itself with complaints of a slow growing intra-abdominal mass. An ultrasound scan demonstrated a thick-walled cystic lesion arising from the pelvis. Further imaging evaluations in the form of a CT scan revealed a complex large cystic mass arising from left upper quadrant (see Figure 1)...
March 5, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29486292/expression-profiles-of-stemness-genes-in-gastrointestinal-stromal-tumor
#7
Chenguang Bai, Xiaohong Liu, Jingjing Xu, Chen Qiu, Runqiu Wang, Jianming Zheng
Gastrointestinal stromal tumor (GIST) is believed to originate from intestinal cells of Cajal or their stem-cell precursors, and expresses stemness-related markers, such as CD117, CD34, DOG1 and nestin. To further characterize phenotypic features of GISTs, we examined expression profiles of a panel of stemness genes in GISTs, by analyzing existing gene expression profiling datasets. Our results showed that mRNA levels of B-lymphoma moloney murine leukaemia virus insertion region-1 (BMI1), kruppel-like factor 4 (KLF4), sal-like protein 4 (SALL4) and telomerase reverse transcriptase (TERT) were significantly unregulated in GISTs...
February 24, 2018: Human Pathology
https://www.readbyqxmd.com/read/29443783/giant-gist-of-the-stomach-a-successful-case-of-safe-resection-with-preoperative-simulation-using-three-dimensional-ct-angiography-case-report
#8
Kentaro Matsuo, Masaya Inoue, Yasutsugu Shirai, Tatsuki Kataoka, Shuji Kagota, Kohei Taniguchi, Sang-Woong Lee, Kazuhisa Uchiyama
RATIONALE: We report a very rare case of safely resectable giant gastrointestinal stromal tumor (GIST) with preoperative three-dimensional computed tomography (3D-CT) angiography in spite of no neoadjuvant treatment. PATIENT'S CONCERN: A 71-year-old woman presented to our hospital with an abdominal giant tumor. As this giant tumor could not be accurately diagnosed by preoperative investigation, we had to perform her surgical treatment without neoadjuvant treatment...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29416639/expression-of-ano1-dog1-is-associated-with-shorter-survival-and-progression-of-breast-carcinomas
#9
Jun Sang Bae, Jeong Yeol Park, See-Hyoung Park, Sang Hoon Ha, Ae Ri An, Sang Jae Noh, Keun Sang Kwon, Sung Hoo Jung, Ho Sung Park, Myoung Jae Kang, Kyu Yun Jang
The expression of ANO1 is considered to have diagnostic specificity for gastrointestinal stromal tumors. However, its function as a calcium-activated chloride channel suggests that the expression of ANO1 is not restricted to gastrointestinal stromal tumors. Recently, it has been reported that ANO1 has roles in the progression of human malignant tumors. However, the role of ANO1 in breast carcinoma has been controversial. Therefore, we investigated the expression of ANO1 in 139 breast carcinoma patients and the role of ANO1 in vitro ...
January 2, 2018: Oncotarget
https://www.readbyqxmd.com/read/29385413/abdominopelvic-and-retroperitoneal-low-grade-fibromyxoid-sarcoma-a-clinicopathologic-study-of-13-cases
#10
Nasir Ud Din, Zubair Ahmad, Riyam Zreik, Andrew Horvai, Andrew L Folpe, Karen Fritchie
Objectives: Low-grade fibromyxoid sarcoma (LGFMS) is a rare tumor often arising in the lower extremities. Only rare examples in the abdominal cavity, pelvis, and retroperitoneum have been reported. Methods: cases of abdominopelvic and retroperitoneal LGFMS were retrieved. MUC4, Actin, ALK, β-catenin, desmin, DOG1, KIT, S100 protein, and STAT6 testing was performed, and a subset was tested for FUS rearrangement. Results: Sites included intra-abdominal/abdominal wall (four cases), retroperitoneum (three cases), pelvis (three cases), small bowel (two cases), and kidney (one case) (median size, 15 cm; age range, 5-61 years)...
January 29, 2018: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29250683/hemorrhagic-polypoid-gastric-and-colonic-metastases-nine-years-after-uterine-leiomyosarcoma-case-report
#11
Nicoleta Puie, Lavinia Patricia Trică, Georgiana Anca Nagy, Ioana Rusu, Alina Simona Şovrea, Carmen Georgiu
INTRODUCTION: Uterine leiomyosarcoma (ULMS) is a rare tumor, representing 1-2% of all uterine malignancies. It is highly aggressive, with high metastatic rate, especially in lungs, peritoneal cavity, retroperitoneum, bones and liver, usually during the first years after diagnosis. CASE PRESENTATION: A 58-year-old woman, with subtotal hysterectomy and bilateral adnexectomy, followed by radiochemotherapy for spindle-type ULMS nine years ago, presented with gastrointestinal bleeding and severe anemia...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29245294/gastrointestinal-stromal-tumor-of-unusual-phenotype-after-imatinib-treatment-a-case-report-and-diagnostic-utility-of-etv1-mrna-in-situ-hybridization
#12
Minsun Jung, Sung-Hye Park, Yoon Kyung Jeon, Jae-Kyung Won, Han-Kwang Yang, Woo Ho Kim
RATIONALE: Gastrointestinal stromal tumor (GIST) is the most common tumor of mesenchymal origin in gastrointestinal tract. Immunohistochemical (IHC) staining combined with a typical morphology is used for the diagnosis of GIST. Typically, IHC staining for v-kit Hardy-Zuckerman 4 feline sarcoma viral oncogene (KIT) and discovered on GIST-1(DOG1) is positive in almost all GISTs. However, imatinib mesylate, a specific inhibitor of KIT tyrosine kinase, frequently involves changes in the morphology and IHC staining of GIST, impeding the diagnosis...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29239034/succinate-dehydrogenase-sdh-deficient-neoplasia
#13
REVIEW
Anthony J Gill
The succinate dehydrogenase (SDH) complex is a key respiratory enzyme composed of four subunits: SDHA, SDHB, SDHC and SDHD. Remarkably, immunohistochemistry for SDHB becomes negative whenever there is bi-alleic inactivation of any component of SDH, which is very rare in the absence of syndromic disease. Therefore, loss of SDHB immunohistochemistry serves as a marker of syndromic disease, usually germline mutation of one of the SDH subunits. Tumours which show loss of SDHB expression are termed succinate dehydrogenase-deficient...
January 2018: Histopathology
https://www.readbyqxmd.com/read/29237476/giant-gastrointestinal-stromal-tumor-with-predominantly-cystic-changes-a-case-report-and-literature-review
#14
Liying Wang, Libin Liu, Zhaohui Liu, Yueli Tian, Zhe Lin
BACKGROUND: Gastrointestinal stromal tumors (GISTs) rarely present with predominantly cystic changes. Here, we report a case of giant GIST of the stomach with predominantly cystic changes in a 74-year-old female patient. CASE PRESENTATION: The tumor was 10 cm × 15 cm in size and positive for CD117, H-caldesmon, and DOG-1. Complete surgical resection was performed without regional lymphadenectomy. The patient recovered uneventfully and no recurrence occurred...
December 13, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29189258/the-use-of-smoothelin-and-other-antibodies-in-the-diagnosis-of-uterine-and-soft-tissue-smooth-muscle-tumors
#15
Kim Greg Mayhall, Estelle Oertling, Eleanor Lewin, John Schmieg, Helena LeBeau, Tong Wu, Byron Crawford
Smoothelin is a cytoplasmic protein expressed in differentiated smooth muscle cells. Immunohistochemical evaluation of smoothelin has previously been reported in gastrointestinal (GI) smooth muscle tumors, but has yet to be studied in smooth muscle tumors of uterine and other soft tissue origin. DOG1 expression is reported to be specific for GI stromal tumors; however, variable expression has been reported in leiomyosarcomas (LMS) depending on site of origin. Overexpression of p16 is common in LMS of uterine and other sites of origin, but has not been correlated with tumor grade...
November 20, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/29139127/combined-transcriptome-and-translatome-analyses-reveal-a-role-for-tryptophan-dependent-auxin-biosynthesis-in-the-control-of-dog1-dependent-seed-dormancy
#16
Bing Bai, Ondřej Novák, Karin Ljung, Johannes Hanson, Leónie Bentsink
The importance of translational regulation during Arabidopsis seed germination has been shown previously. Here the role of transcriptional and translational regulation during seed imbibition of the very dormant DELAY OF GERMINATION 1 (DOG1) near-isogenic line was investigated. Polysome profiling was performed on dormant and after-ripened seeds imbibed for 6 and 24 h in water and in the transcription inhibitor cordycepin. Transcriptome and translatome changes were investigated. Ribosomal profiles of after-ripened seeds imbibed in cordycepin mimic those of dormant seeds...
February 2018: New Phytologist
https://www.readbyqxmd.com/read/29030481/antisense-transcription-represses-arabidopsis-seed-dormancy-qtl-dog1-to-regulate-drought-tolerance
#17
Ruslan Yatusevich, Halina Fedak, Arkadiusz Ciesielski, Katarzyna Krzyczmonik, Anna Kulik, Grazyna Dobrowolska, Szymon Swiezewski
Plants have developed multiple strategies to sense the external environment and to adapt growth accordingly. Delay of germination 1 ( DOG1 ) is a major quantitative trait locus (QTL) for seed dormancy strength in Arabidopsis thaliana that is reported to be expressed exclusively in seeds. DOG1 is extensively regulated, with an antisense transcript ( asDOG1 ) suppressing its expression in seeds. Here, we show that asDOG1 shows high levels in mature plants where it suppresses DOG1 expression under standard growth conditions...
December 2017: EMBO Reports
https://www.readbyqxmd.com/read/29018259/clinicopathological-and-molecular-characteristics-of-synchronous-gastric-adenocarcinoma-and-gastrointestinal-stromal-tumors
#18
Jun-Ming Luo, Fa-Long Cao, Chen Meng, Li-Jun Lin, Si-Qing Ma, Shao-Hua Peng, Hong-Ling Gao, Sara Javidiparsijani, Gui-Rong Wang, Meng-Lan Zhang, Jian-Guo Xin, Yi-Chun Wang, Shu-Kun Zhang
Synchronous gastric tumors that consist of both gastrointestinal stromal tumor (GIST) and adenocarcinoma are rare. We studied the clinicopathological and molecular characteristics of six cases containing both gastric adenocarcinoma and GIST. By means of immunohistochemical analysis, all GIST cells expressed CD117, CD34 and Dog1 in all six synchronous gastric adenocarcinomas with GIST, and in GIST alone. Sequencing analysis demonstrated that exon 11 c-kit mutations were present in two of six synchronous tumors and four of five GISTs...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28965630/expression-of-dog1-in-low-grade-fibromyxoid-sarcoma-a-study-of-19-cases-and-review-of-the-literature
#19
Ana Vallejo-Benítez, Enrique Rodríguez-Zarco, Sara Pabón Carrasco, Sofia Pereira-Gallardo, Javier Brugal Molina, Antonio García-Escudero, Antonio Robles Frías, David Marcilla, Ricardo González-Cámpora
DOG1 is a highly-sensitive marker often included in the immunohistochemical panel for the diagnosis of gastrointestinal stromal tumors (GISTs). Recent research has shown that DOG1 may also be expressed by low-grade fibromyxoid sarcomas (LGFMSs); this may give rise to diagnostic error when the sarcoma is located in the abdominal cavity. This paper reports on immnohistochemical expression of DOG1 in 19 LGFMSs using two different monoclonal antibodies: K9 (Leica, Novocastra Laboratories, Newcastle upon Tyne, UK) and SP31 (Thermo Scientific, Freemont, USA)...
October 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28941290/physiological-and-molecular-mechanisms-underlying-the-integration-of-light-and-temperature-cues-in-arabidopsis-thaliana-seeds
#20
María Verónica Arana, Rocío Soledad Tognacca, Maximiliano Estravis-Barcalá, Rodolfo Augusto Sánchez, Javier Francisco Botto
The relief of dormancy and the promotion of seed germination are of extreme importance for a successful seedling establishment. Although alternating temperatures and light are signals promoting the relief of seed dormancy, the underlying mechanisms of their interaction in seeds are scarcely known. By exposing imbibed Arabidopsis thaliana dormant seeds to two-day temperature cycles previous of a red light pulse, we demonstrate that the germination mediated by phytochrome B requires the presence of functional PSEUDO-RESPONSE REGULATOR 7 (PRR7) and TIMING OF CAB EXPRESSION 1 (TOC1) alleles...
December 2017: Plant, Cell & Environment
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