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Fluorescence in-situ hybridization

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https://www.readbyqxmd.com/read/28329507/giant-benign-intradermal-melanocytic-nevus-of-rapid-onset
#1
Sarah J Coates, Andrew Avarbock, Garrett T Desman
Benign melanocytic nevi are slowly growing acquiredor congenital tumors with varied morphology,commonly encountered in dermatology clinics. Anytumor with rapid clinical growth must be assessedcarefully in order to exclude malignancy. We report awoman with a histopathologically benign intradermalnevus that presented as a rapidly evolving largecutaneous mass on the ear. Owing to the discrepancybetween the clinical and histopathological findings,an extensive histopathological work-up involvingmany deeper sections, immunohistochemical stains,and fluorescent in situ hybridization (FISH) analysiswas conducted in order to rule out malignancy...
February 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329013/the-origin-of-b-chromosomes-in-yellow-necked-mice-apodemus-flavicollis-break-rules-but-keep-playing-the-game
#2
M Rajičić, S A Romanenko, T V Karamysheva, J Blagojević, T Adnađević, I Budinski, A S Bogdanov, V A Trifonov, N B Rubtsov, M Vujošević
B chromosomes (Bs) are known for more than hundred years but their origin, structure and pattern of evolution are not well understood. In the past few years new methodological approaches, involving isolation of Bs followed by whole DNA amplification, DNA probe generation, and fluorescent in situ hybridization (FISH) or the B chromosome DNA sequencing, has allowed detailed analysis of their origin and molecular structure in different species. In this study we explored the origin of Bs in the yellow-necked wood mouse, Apodemus flavicollis, using generation of microdissected DNA probes followed by FISH on metaphase chromosomes...
2017: PloS One
https://www.readbyqxmd.com/read/28326957/alk-gene-copy-number-gain-and-immunohistochemical-expression-status-using-three-antibodies-in-neuroblastoma
#3
Eun Kyung Kim, Sewha Kim
Anaplastic lymphoma kinase ( ALK) gene aberrations-such as mutations, amplifications, and copy number gains-represent a major genetic predisposition to neuroblastoma (NB). This study aimed to evaluate the correlation between ALK gene copy number status, ALK protein expression, and clinicopathological parameters. We retrospectively retrieved 30 cases of poorly differentiated NB and constructed tissue microarrays (TMAs). ALK copy number changes were assessed by fluorescence in situ hybridization (FISH) assays, and ALK immunohistochemistry (IHC) testing was performed using three different antibodies (ALK1, D5F3, and 5A4 clones)...
March 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28326151/chronic-porphyromonas-gingivalis-infection-accelerates-the-occurrence-of-age-related-granules-in-apoe-mice-brains
#4
Sim K Singhrao, Sasanka Chukkapalli, Sophie Poole, Irina Velsko, St John Crean, Lakshmyya Kesavalu
This study explored the origin of age-related granules in the apolipoprotein E gene knockout (ApoE(-/-)) B6 background mice brains following chronic gingival infection with Porphyromonas gingivalis for 24 weeks. Intracerebral localization of P. gingivalis was detected by fluorescence in situ hybridization (FISH) and its protease by immunohistochemistry. The age-related granules were observed by periodic acid-Schiff (PAS), silver impregnation, and immunostaining. FISH showed intracerebral dissemination of P...
2017: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/28325690/one-nuclear-calcium-transient-induced-by-a-single-burst-of-action-potentials-represents-the-minimum-signal-strength-in-activity-dependent-transcription-in-hippocampal-neurons
#5
Yan Yu, Kristin Oberlaender, C Peter Bengtson, Hilmar Bading
Neurons undergo dramatic changes in their gene expression profiles in response to synaptic stimulation. The coupling of neuronal excitation to gene transcription is well studied and is mediated by signaling pathways activated by cytoplasmic and nuclear calcium transients. Despite this, the minimum synaptic activity required to induce gene expression remains unknown. To address this, we used cultured hippocampal neurons and cellular compartment analysis of temporal activity by fluorescence in situ hybridization (catFISH) that allows detection of nascent transcripts in the cell nucleus...
March 6, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28325366/whorling-cellular-perineurioma-a-previously-undescribed-variant-closely-mimicking-monophasic-fibrous-synovial-sarcoma
#6
Michael Michal, Dmitry V Kazakov, Abbas Agaimy, Marta Hosova, Kvetoslava Michalova, Petr Grossmann, Petr Steiner, Faruk Skenderi, Semir Vranic, Michal Michal
The authors present a distinctive perineurioma (PN) variant which morphologically strongly resembles monophasic fibrous synovial sarcoma (MSS). The patients were 3 males and 1 female. The age ranged from 15 to 61years (mean: 44years). Locations included the sole, lower jaw, palm and foot. The tumor size ranged from 1.3cm to 2.5cm in the largest dimension (mean 1.8cm). Morphologically, all tumors had an identical, monotonous appearance. The perineurial cells were closely packed and created a confluent cellular whorls and/or sheets in a scarce stroma, with only focally discernible long, slender cytoplasmic processes typical for perineurial differentiation...
April 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28325354/solitary-plasmacytoma-associated-with-epstein-barr-virus-a-clinicopathologic-cytogenetic-study-and-literature-review
#7
Jiaqi Yan, Jianchao Wang, Wenyan Zhang, Min Chen, Jie Chen, Weiping Liu
Solitary plasmacytoma (SP) is an uncommon, indolent tumor of plasma cell neoplasms that presents as a mass lesion in extramedullary sites. Evidence of Epstein-Barr virus (EBV) infection is frequently associated with various lymphatic and hematopoietic malignancies but is relatively rare in SP. Moreover, it is essential to distinguish EBV-positive plasmacytoma from plasmablastic lymphoma. In this study, we found 4 EBV-encoded RNA (EBER)-positive patients among 46 consecutive immunocompetent patients of SP and compared the clinicopathologic features of these patients with those of the EBER-negative cohort...
April 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28324503/visualization-of-human-telomerase-localization-by-fluorescence-microscopy-techniques
#8
Eladio Abreu, Rebecca M Terns, Michael P Terns
Human telomerase is a ribonucleoprotein (RNP) that synthesizes DNA repeats at the ends of chromosomes and maintains telomere length and genome stability. The enzyme is comprised of telomerase RNA (hTR) (which provides the template for telomere addition) and several protein subunits including telomerase reverse transcriptase (hTERT) (the catalytic component). Intracellular trafficking of the enzyme has emerged as an important factor in the regulation of telomerase activity. Telomerase trafficking between nuclear Cajal bodies (proposed sites of telomerase biogenesis and regulation) and telomeres (sites of action) is regulated by the cell cycle in concordance with telomere synthesis during S phase...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28324496/telomere-strand-specific-length-analysis-by-fluorescent-in-situ-hybridization-q-co-fish
#9
Isabelle Ourliac-Garnier, Arturo Londoño-Vallejo
The implementation of quantitative approaches in telomere chromosome-oriented FISH (telomeric CO-FISH) allows the assessment of the relative efficiency of lagging versus leading strand telomere replication and thus provides information on the implicated mechanisms. Here we describe a simple method for telomere strand-specific analyses and discuss its potential applications.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28324495/telomere-length-analysis-by-quantitative-fluorescent-in-situ-hybridization-q-fish
#10
Isabelle Ourliac-Garnier, Arturo Londoño-Vallejo
Length is a functional parameter of telomeres, the nucleoprotein structures that protect chromosome ends. The availability of highly specific, high affinity probes for telomeric repeat sequences allowed the development of quantitative approaches aimed at measuring telomere length directly on chromosomes or in interphase nuclei. Here, we describe a general method for telomere quantitative FISH on metaphase chromosomes and discuss its most common applications in research.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28322800/single-molecule-mtdna-fiber-fish-for-analyzing-numtogenesis
#11
Dal-Hoe Koo, Bhupendra Singh, Jiming Jiang, Bernd Friebe, Bikarm S Gill, Paul D Chastain, Upender Manne, Hemant K Tiwari, Keshav K Singh
Somatic human cells contains thousands of copies of mitochondrial DNA (mtDNA). In eukaryotes, natural transfer of mtDNA into the nucleus generates nuclear mitochondrial DNA (NUMT) copies in eukaryotes. We name this phenomenon as "numtogenesis". Numtogenesis is a well-established evolutionary process reported in various sequenced eukaryotic genomes. We have established a molecular tool to rapidly detect and analyze NUMT insertions in whole genomes. To date, NUMT analyses depend on deep genome sequencing combined with comprehensive computational analyses of the whole genome...
March 17, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28322191/met-gene-amplification-and-overexpression-in-chinese-non-small-cell-lung-cancer-patients-without-egfr-mutations
#12
Zhengbo Song, Xuzhou Wang, Yuhui Zheng, Haiyan Su, Yiping Zhang
BACKGROUND: The prevalence and clinical pathologic characteristics of MET amplification and overexpression in Chinese patients with non-small-cell lung cancer (NSCLC) remain unknown. In this multicenter study, we sought to reveal the frequency and clinical pathologic characteristics of MET amplification and to explore the predictive value of MET amplification and overexpression status in relation to survival in Chinese NSCLC patients. PATIENTS AND METHODS: MET amplification was detected by fluorescence in-situ hybridization in 791 patients with EGFR wild-type samples...
March 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/28321808/uncommon-features-of-surgically-resected-alk-positive-cavitary-lung-adenocarcinoma-a-case-report
#13
Shinkichi Takamori, Masafumi Yamaguchi, Kenichi Taguchi, Makoto Edagawa, Shinichiro Shimamatsu, Ryo Toyozawa, Kaname Nosaki, Fumihiko Hirai, Takashi Seto, Mitsuhiro Takenoyama, Yukito Ichinose
Some features found on chest computed tomography (CT), such as central tumor location, large pleural effusion, and the absence of a pleural tail, and a patient age of less than 60 years, have been suggested to be useful in predicting anaplastic lymphoma kinase (ALK) rearrangement in patients with non-small cell lung cancer (NSCLC).A 68-year-old female patient with a history of gynecological treatment was found to have a cavitary mass in the right lower lobe on an annual chest roentgenogram. The tumor was located in the peripheral area with a pleural tail showing no pleural effusion...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28320420/malignant-gastrointestinal-neuroectodermal-tumor-a-case-report-and-review-of-the-literature
#14
Mohammed J Alyousef, Jumana A Alratroot, Tarek ElSharkawy, Mohamed A Shawarby, Mohammad A Al Hamad, Tarek M Hashem, Ahmed Alsayyah
BACKGROUND: Malignant gastrointestinal neuroectodermal tumor (GNET) is an extremely rare entity that was first described by Zambrano et al. in 2003 as "Clear cell sarcoma-like tumor of the gastrointestinal tract". It shares some of the histological features of clear cell sarcoma (CCS) but lacks the immunohistochemical reactivity for melanocytic markers. We report a case of GNET that was initially misdiagnosed as gastrointestinal stromal tumor (GIST). Recognizing this entity is important to avoid misdiagnosis...
March 20, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28318417/itfish-enhanced-staining-by-iterative-fluorescent-in-situ-hybridization
#15
Richard H Row, Benjamin L Martin
Fluorescent in situ hybridization (FISH) is an important tool for zebrafish research, particularly when observing the expression of two different genes in the same embryo. Peroxidase-catalyzed deposition of tyramide-conjugated dyes is a widely used and cost-effective approach to performing FISH. A major limitation of the technique is that it does not work well for weakly expressed genes. Here we present a method adapted from planarian research for use in zebrafish that provides a dramatic enhancement of weak staining...
March 20, 2017: Zebrafish
https://www.readbyqxmd.com/read/28315422/sfpq-psf-tfe3-renal-cell-carcinoma-rcc-a-clinicopathologic-study-emphasizing-extended-morphology-and-reviewing-the-differences-between-sfpq-tfe3-rcc-and-the-corresponding-mesenchymal-neoplasm-despite-an-identical-gene-fusion
#16
Xiao-Tong Wang, Qiu-Yuan Xia, Hao Ni, Sheng-Bing Ye, Rui Li, Xuan Wang, Shan-Shan Shi, Xiao-Jun Zhou, Qiu Rao
Xp11 translocation renal cell carcinoma (RCC) with SFPQ/PSF-TFE3 gene fusion is a rare epithelial tumor. Of note, the appearance of the gene fusion does not necessarily mean that it is renal cell carcinoma. The corresponding mesenchymal neoplasms, including Xp11 neoplasm with melanocytic differentiation, TFE3 rearrangement-associated perivascular epithelioid cell tumor (PEComa) and melanotic Xp11 translocation renal cancer, can also harbor the identical gene fusion. However, the differences between Xp11 translocation RCC and the corresponding mesenchymal neoplasm have only recently been described...
March 14, 2017: Human Pathology
https://www.readbyqxmd.com/read/28314333/fluorescence-in-situ-hybridization-fish-application-guide
#17
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28314114/st-sub-2-sub-80-a-new-fish-marker-for-st-genome-and-genome-analysis-in-triticeae
#18
Long Wang, Qinghua Shi, Handong Su, Yi Wang, Sha Lina, Xing Fan, Kang Houyang, Zhang Haiqin, Yong-Hong Zhou
<b>St</b> genome is one of the most fundamental genomes in Triticeae. Repetitive sequences are widely used to distinguish different genomes or species. The primary objectives of this study are (1) to screen a new sequence that can easily distinguish the chromosome of <b>St</b> and other genome by fluorescence in situ hybridization (FISH); (2) to investigate the genome constitutions of some species remains uncertain and controversial. We used degenerated oligonucleotide primer PCR (Dop-PCR), Dot-blot and FISH to screen new marker for <b>St</b> genome and tested efficiency of this marker in detection <b>St</b> chromosome at different ploidy level...
March 17, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28303622/morphology-and-phylogeny-of-the-soil-ciliate-metopus-yantaiensis-n-sp-ciliophora-metopida-with-identification-of-the-intracellular-bacteria
#19
Atef Omar, Qianqian Zhang, Songbao Zou, Jun Gong
The morphology and infraciliature of a new ciliate, Metopus yantaiensis n. sp., discovered in coastal soil of northern China, were investigated. It is distinguished from its congeners by a combination of the following features: nuclear apparatus situated in the preoral dome; 18-21 somatic ciliary rows, of which three extend onto the preoral dome (dome kineties); three to five distinctly elongated caudal cilia, and 21-29 adoral polykinetids. The 18S rRNA genes of this new species and two congeners, M. contortus and M...
March 17, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28302989/bacterial-microbiota-associated-with-the-glacier-ice-worm-is-dominated-by-both-worm-specific-and-glacier-derived-facultative-lineages
#20
Takumi Murakami, Takahiro Segawa, Roman Dial, Nozomu Takeuchi, Shiro Kohshima, Yuichi Hongoh
The community structure of bacteria associated with the glacier ice worm Mesenchytraeus solifugus was analyzed by amplicon sequencing of 16S rRNA genes and their transcripts. Ice worms were collected from two distinct glaciers in Alaska, Harding Icefield and Byron Glacier, and glacier surfaces were also sampled for comparison. Marked differences were observed in bacterial community structures between the ice worm and glacier surface samples. Several bacterial phylotypes were detected almost exclusively in the ice worms, and these bacteria were phylogenetically affiliated with either animal-associated lineages or, interestingly, clades mostly consisting of glacier-indigenous species...
March 9, 2017: Microbes and Environments
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