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https://www.readbyqxmd.com/read/28548297/dysregulation-of-the-causative-genes-for-hereditary-parkinsonism-in-the-midbrain-in-parkinson-s-disease
#1
Yun Joong Kim, Junbeom Jeon, Jaemoon Shin, Nan Young Kim, Jeong Hoon Hong, Jae-Min Oh, SangKyoon Hong, Yeo Jin Kim, Young-Eun Kim, Suk Yun Kang, Hyeo-Il Ma, Unjoo Lee, Jeehee Yoon
BACKGROUND AND OBJECTIVES: Many hereditary movement disorders with complex phenotypes without a locus symbol prefix for familial PD present as parkinsonism; however, the dysregulation of genes associated with these phenotypes in the SNpc of PD patients has not been systematically studied. METHODS: Gene set enrichment analyses were performed using 10 previously published genome-wide expression datasets obtained by laser-captured microdissection of pigmented neurons in the SNpc...
May 26, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28548126/microrna-dysregulation-in-the-tumor-microenvironment-influences-the-phenotype-of-pancreatic-cancer
#2
Eva Karamitopoulou, Stefan Haemmig, Ulrich Baumgartner, Cornelia Schlup, Martin Wartenberg, Erik Vassella
Cellular interactions in the tumor microenvironment influence neoplastic progression in pancreatic ductal adenocarcinoma. One underlying mechanism is the induction of the prognostically unfavorable epithelial-mesenchymal-transition-like tumor budding. Our aim is to explore the expression of microRNAs implicated in the regulation of tumor budding focusing on the microenvironment of the invasive front. To this end, RNA from laser-capture-microdissected material of the main tumor, tumor buds, juxta-tumoral stroma, tumor-remote stroma, and non-neoplastic pancreatic parenchyma from pancreatic cancer cases with (n=7) and without (n=6) tumor budding was analyzed by qRT-PCR for the expression of a panel of miRNAs that are known to be implicated in the regulation of epithelial-mesenchymal transition, including miR-21, miR-183, miR-200b, miR-200c, miR-203, miR-205, miR-210, and miR-217...
May 26, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28543514/angioimmunoblastic-t-cell-lymphoma-more-than-a-disease-of-t-follicular-helper-cells
#3
François Lemonnier, Tak W Mak
Angioimmunoblastic T cell lymphoma (AITL) is one of the most frequent entities of peripheral T cell lymphoma. An AITL has two components: the AITL tumor cells that have a T follicular helper (TFH) cell phenotype, and a surrounding and extensive tumor microenvironment that is populated with various reactive cell types, including B cells. Recurrent TET2 mutations have been described in 50-80% of AITLs, possibly occurring in a hematopoietic progenitor cell. An article published recently in The Journal of Pathology describes the use of microdissection to isolate PD1(+) AITL tumor cells and CD20(+) B cells from the AITL microenvironment and to show that TET2 mutations are actually more frequent in these diseases than previously thought...
May 24, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28542144/dicer-and-micrornas-protect-adult-dopamine-neurons
#4
Piotr Chmielarz, Julia Konovalova, Syeda Sadia Najam, Heike Alter, Timo Petteri Piepponen, Holger Erfle, Kai C Sonntag, Günther Schütz, Ilya A Vinnikov, Andrii Domanskyi
MicroRNAs (miRs) are important post-transcriptional regulators of gene expression implicated in neuronal development, differentiation, aging and neurodegenerative diseases, including Parkinson's disease (PD). Several miRs have been linked to PD-associated genes, apoptosis and stress response pathways, suggesting that deregulation of miRs may contribute to the development of the neurodegenerative phenotype. Here, we investigate the cell-autonomous role of miR processing RNAse Dicer in the functional maintenance of adult dopamine (DA) neurons...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28541485/histologically-defined-intratumoral-sequencing-uncovers-evolutionary-cues-into-conserved-molecular-events-driving-gliomagenesis
#5
Antony Prabhu, Pravin Kesarwani, Shiva Kant, Stewart F Graham, Prakash Chinnaiyan
BACKGROUND: Glioblastoma represents an archetypal example of a heterogeneous malignancy. To understand the diverse molecular consequences of this complex tumor ecology, we analyzed RNA-seq data generated from commonly identified intra-tumoral structures in glioblastoma enriched using laser capture microdissection. METHODS: Raw gene-level fragments per kilobase of transcript per million reads mapped (FPKM) values and the associated clinical data were acquired from the publically available Ivy GAP database and analyzed using MetaboAnalyst (v...
May 25, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28540237/serum-testosterone-levels-and-other-determinants-of-sperm-retrieval-in-microdissection-testicular-sperm-extraction
#6
Sultan A Althakafi, Osama M Mustafa, Raouf M Seyam, Naif Al-Hathal, Said Kattan
BACKGROUND: Microdissection testicular sperm extraction (microTESE) has become the standard of care for sperm retrieval in non-obstructive azoospermia (NOA) patients. Understanding the significant determinants of microTESE outcomes may result in improvements in sperm retrieval rates and provide better-informed clinical decisions. METHODS: This is a clinical retrospective study conducted through chart review of 421 NOA patients who underwent microTESE between August 2009 and July 2015 in a tertiary-care referral hospital...
April 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28536261/the-let-7-lin28-axis-regulates-activation-of-hepatic-stellate-cells-in-alcoholic-liver-injury
#7
Kelly McDaniel, Li Huang, Keisaku Sato, Nan Wu, Tami Annable, Tianhao Zhou, Sugeily Ramos-Lorenzo, Ying Wan, Qiaobing Huang, Heather Francis, Shannon Glaser, Hidekazu Tsukamoto, Gianfranco Alpini, Fanyin Meng
The let-7/lin28 axis is associated with the regulation of key cellular regulatory genes known as microRNAs (miRNAs) in different human disorders and cancer development. This study evaluated the role of the let-7/lin28 axis in regulating a mesenchymal phenotype of hepatic stellate cells in alcoholic liver injury. We identified that ethanol feeding significantly downregulated several members of the let-7 family in mouse liver, including let-7a and let-7b. Similarly, the treatment of human hepatic stellate cells (hHSCs) with lipopolysaccharide (LPS) and TGF-β significantly decreased the expressions of let-7a and let-7b...
May 23, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28531107/analysis-of-gene-expression-signatures-in-cancer-associated-stroma-from-canine-mammary-tumours-reveals-molecular-homology-to-human-breast-carcinomas
#8
Julia Ettlin, Elena Clementi, Parisa Amini, Alexandra Malbon, Enni Markkanen
Cancer-associated stroma (CAS) plays a key role in cancer initiation and progression. Spontaneously occurring canine mammary carcinomas are viewed as excellent models of human breast carcinomas. Considering the importance of CAS for human cancer, it likely plays a central role in canine tumours as well. So far, however, canine CAS lacks characterisation, and it remains unclear whether the biology between CAS from canine and human tumours is comparable. In this proof-of-principle study, using laser-capture microdissection, we isolated CAS and normal stroma from 13 formalin-fixed paraffin embedded canine simple mammary carcinomas and analysed the expression of seven known human CAS markers by RT-qPCR (Reverse Transcription quantitative PCR) and validated some targets by immunohistochemistry...
May 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28529470/microdissection-of-the-ah01-chromosome-in-upland-cotton-and-microcloning-of-resistance-gene-anologs-from-the-single-chromosome
#9
Xinchuan Cao, Yuling Liu, Zhen Liu, Fang Liu, Yalei Wu, Zhongli Zhou, Xiaoyan Cai, Xingxing Wang, Zhenmei Zhang, Yuhong Wang, Zhimin Luo, Renhai Peng, Kunbo Wang
BACKGROUND: Chromosome microdissection is one of the most important techniques in molecular cytogenetic research. Cotton (Gossypium Linnaeus, 1753) is the main natural fiber crop in the world. The resistance gene analog (RGA) cloning after its single chromosome microdissection can greatly promote cotton genome research and breeding. RESULTS: Using the linker adaptor PCR (LA-PCR) with the primers of rice disease-resistance homologues, three nucleotide sequences PS016 (KU051681), PS054 (KU051682), and PS157 (KU051680) were obtained from the chromosome Ah01 of upland cotton (cv...
2017: Hereditas
https://www.readbyqxmd.com/read/28527949/microproteome-of-dentoalveolar-tissues
#10
Cristiane R Salmon, Ana Paula O Giorgetti, Adriana F Paes Leme, Romênia R Domingues, Tamara N Kolli, Brian L Foster, Francisco H Nociti
Proteomic analysis of extracellular matrices (ECM) of dentoalveolar tissues can provide insights into developmental, pathological, and reparative processes. However, targeted dissection of mineralized tissues, dental cementum (DC), alveolar bone (AB), and dentin (DE), presents technical difficulties. We demonstrate an approach combining EDTA decalcification and laser capture microdissection (LCM), followed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS), to analyze proteome profiles of these tissues...
May 17, 2017: Bone
https://www.readbyqxmd.com/read/28521483/use-of-laser-capture-microdissection-allows-detection-of-loss-of-heterozygosity-in-chromosome-9p-in-breast-cancer
#11
Margarida Figueiredo Dias, Robert Blumenstein, Jose Russo
The present study was designed to determine whether loss of heterozygosity (LOH) in the p arm of chromosome 9 in invasive ductal carcinoma of the breast is detected during the neoplastic progression of the disease. Using laser capture microdissection (LCM) epithelial cells were isolated from 14 invasive ductal carcinoma cases (IDC), ductal carcinomas in situ (DCIS), normal mammary lobules, skin and/or lymph nodes of paraffin embedded tissue sections. LOH analysis of chromosome 9p was performed utilizing the microsatellite markers D9S199, D9S157, D9S171, D9S265 and D9S270...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28513873/myxoid-fibroadenomas-differ-from-conventional-fibroadenomas-a-hypothesis-generating-study
#12
John R Lozada, Kathleen A Burke, Aoife Maguire, Fresia Pareja, Raymond S Lim, Jisun Kim, Rodrigo Gularte-Merida, Melissa P Murray, Edi Brogi, Britta Weigelt, Jorge S Reis-Filho, Felipe C Geyer
AIMS: Breast myxoid fibroadenomas (MFAs) are characterized by a distinctive hypocellular myxoid stroma, and occur sporadically or in the context of Carney Complex, an inheritable condition caused by PRKAR1A inactivating germline mutations. Conventional fibroadenomas (FAs) are underpinned by recurrent MED12 mutations in the stromal components of the lesions. We sought to investigate the genomic landscape of MFAs and compare it to that of conventional FAs. METHODS AND RESULTS: Eleven MFAs from patients without clinical and/or genetic evidence of Carney Complex were retrieved...
May 17, 2017: Histopathology
https://www.readbyqxmd.com/read/28511992/rna-seq-analyses-reveal-that-cervical-spinal-cords-and-anterior-motor-neurons-from-amyotrophic-lateral-sclerosis-subjects-show-reduced-expression-of-mitochondrial-dna-encoded-respiratory-genes-and-rhtfam-may-correct-this-respiratory-deficiency
#13
Amy C Ladd, David G Brohawn, Ravindar R Thomas, Paula M Keeney, Stuart S Berr, Shaharyar M Khan, Francisco R Portell, Meiram Zh Shakenov, Patrick F Antkowiak, Bijoy Kundu, Nicholas Tustison, James P Bennett
Amyotrophic lateral sclerosis (ALS) is a generally fatal neurodegenerative disease of adults that produces weakness and atrophy due to dysfunction and death of upper and lower motor neurons. We used RNA-sequencing (RNA-seq) to analyze expression of all mitochondrial DNA (mtDNA)-encoded respiratory genes in ALS and CTL human cervical spinal cords (hCSC) and isolated motor neurons. We analyzed with RNA-seq mtDNA gene expression in human neural stem cells (hNSC) exposed to recombinant human mitochondrial transcription factor A (rhTFAM), visualized in 3-dimensions clustered gene networks activated by rhTFAM, quantitated their interactions with other genes and determined their gene ontology (GO) families...
May 13, 2017: Brain Research
https://www.readbyqxmd.com/read/28511180/response-predictors-of-s-1-cisplatin-and-docetaxel-combination-chemotherapy-for-metastatic-gastric-cancer-microarray-analysis-of-whole-human-genes
#14
Shinji Kitamura, Toshihito Tanahashi, Eriko Aoyagi, Tadahiko Nakagawa, Koichi Okamoto, Tetsuo Kimura, Hiroshi Miyamoto, Yasuhiro Mitsui, Kazuhito Rokutan, Naoki Muguruma, Tetsuji Takayama
OBJECTIVES: The aim of this study was to identify biomarkers for predicting the efficacy of docetaxel, cisplatin, and S-1 (DCS) therapy for advanced gastric cancer using microarrays of biopsy specimens before chemotherapy. METHODS: Nineteen samples were taken from 19 patients with unresectable metastatic gastric cancer who received DCS as a first-line therapy. Laser capture microdissection was performed, and total cellular RNA was extracted from each microdissected sample...
May 17, 2017: Oncology
https://www.readbyqxmd.com/read/28511094/isolation-and-genetic-analysis-of-pure-cells-from-forensic-biological-mixtures-the-precision-of-a-digital-approach
#15
F Fontana, C Rapone, G Bregola, R Aversa, A de Meo, G Signorini, M Sergio, A Ferrarini, R Lanzellotto, G Medoro, G Giorgini, N Manaresi, A Berti
Latest genotyping technologies allow to achieve a reliable genetic profile for the offender identification even from extremely minute biological evidence. The ultimate challenge occurs when genetic profiles need to be retrieved from a mixture, which is composed of biological material from two or more individuals. In this case, DNA profiling will often result in a complex genetic profile, which is then subject matter for statistical analysis. In principle, when more individuals contribute to a mixture with different biological fluids, their single genetic profiles can be obtained by separating the distinct cell types (e...
May 1, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28508575/upregulation-of-inflammatory-mediators-in-the-ventricular-zone-after-cortical-stroke
#16
Adrianna N Gunton, Juan C Sanchez-Arias, Esther O Carmona-Wagner, Leigh E Wicki-Stordeur, Leigh Anne Swayne
PURPOSE: After cortical stroke, neural precursor cells (NPCs) in the distal ventricular zone (VZ) proliferate more rapidly and migrate towards the injured cortex. While evidence suggests this can enhance stroke recovery, the underlying molecular mechanisms initiating the response are poorly understood. Here we identified changes in protein expression in the ipsilateral VZ early (4 hours) after stroke to gain insight into the initial mechanisms involved in NPC activation post-stroke. EXPERIMENTAL DESIGN: Four hours after photothrombotic stroke (or sham surgery control) in the sensorimotor cortex, adult mice (10 stroke, 10 sham) were subjected to cardiac perfusion with PBS, and ipsilateral and contralateral VZ tissue was microdissected...
May 15, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/28508367/combined-maldi-mass-spectrometry-imaging-and-parafilm-assisted-microdissection-based-lc-ms-ms-workflows-in-the-study-of-the-brain
#17
Jusal Quanico, Julien Franck, Maxence Wisztorski, Michel Salzet, Isabelle Fournier
Proteins and other biomolecules such as lipids are significant players in the central nervous system and are implicated in various neurological disorders. Their identification, quantification, and distribution are thus important not only in understanding the disease but also in developing treatments. A combined workflow allowing the localized microextraction of discrete regions identified by a matrix-assisted laser desorption/ionization mass spectrometry (MSI) imaging experiment for proteomics analysis by liquid chromatography/tandem mass spectrometry (LC MS/MS) is described in this chapter...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28505189/small-and-big-hodgkin-reed-sternberg-cells-of-hodgkin-lymphoma-cell-lines-l-428-and-l-1236-lack-consistent-differences-in-gene-expression-profiles-and-are-capable-to-reconstitute-each-other
#18
Benjamin Rengstl, Sooji Kim, Claudia Döring, Christian Weiser, Julia Bein, Katrin Bankov, Marco Herling, Sebastian Newrzela, Martin-Leo Hansmann, Sylvia Hartmann
The hallmark of classical Hodgkin lymphoma (cHL) is the presence of giant, mostly multinucleated Hodgkin-Reed-Sternberg (HRS) cells. Whereas it has recently been shown that giant HRS cells evolve from small Hodgkin cells by incomplete cytokinesis and re-fusion of tethered sister cells, it remains unsolved why this phenomenon particularly takes place in this lymphoma and what the differences between these cell types of variable sizes are. The aim of the present study was to characterize microdissected small and giant HRS cells by gene expression profiling and to assess differences of clonal growth behavior as well as susceptibility toward cytotoxic intervention between these different cell types to provide more insight into their distinct cellular potential...
2017: PloS One
https://www.readbyqxmd.com/read/28505127/variability-of-dna-methylation-within-schizophrenia-risk-loci-across-subregions-of-human-hippocampus
#19
W Brad Ruzicka, Sivan Subburaju, Francine M Benes
Identification of 108 genomic regions significantly associated with schizophrenia risk by the Psychiatric Genomics Consortium was a milestone for the field, and much work is now focused on determining the mechanism of risk associated with each locus. Within these regions, we investigated variability of DNA methylation, a low-level cellular phenotype closely linked to genotype, in two highly similar cellular populations sampled from the human hippocampus, to draw inferences about the elaboration of genotype to phenotype within these loci enriched for schizophrenia risk...
May 15, 2017: Genes
https://www.readbyqxmd.com/read/28503055/protein-markers-associated-with-an-aldh-sub-population-in-colorectal-cancer
#20
Rui Yang, Xinhua Liu, Smathorn Thakolwiboon, Jianhui Zhu, Xiucong Pei, Mingrui An, Zhijing Tan, David M Lubman
ALDH has been shown to be a marker that denotes a sub-population of cancer stem cells in colorectal and other cancers. This sub-population of cells shows an increased risk for tumor initiation, metastasis, and resistance to chemotherapy and radiation resulting in recurrence and death. It is thus essential to identify the important signaling pathways related to ALDH1+ CSCs in colon cancer. The essential issue becomes to isolate pure sub-populations of cells from heterogeneous tissues for further analysis. To achieve this goal, tissues from colorectal cancer Stage III patients were immuno-stained with ALDH1 antibody...
October 2016: Journal of Proteomics & Bioinformatics
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