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https://www.readbyqxmd.com/read/29029205/transcriptome-analysis-of-the-triatoma-infestans-hemiptera-reduviidae-integument
#1
Gustavo M Calderón-Fernández, Débora E Moriconi, Andrea B Dulbecco, M Patricia Juárez
The insect integument, formed by the cuticle and the underlying epidermis, is essential for insect fitness, regulation of lipid biosynthesis and storage, insect growth and feeding, together with development progress. Its participation in insecticide resistance has also been outlined. Triatoma infestans Klug (Hemiptera: Reduviidae) is one of the major vectors of Chagas disease in South America; however, genomic data are scarce. In this study, we performed a transcriptome analysis of the nymph integument in order to identify which genes are expressed and their putative role...
September 27, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29028819/the-anti-myeloma-activity-of-bone-morphogenetic-protein-2-predominantly-relies-on-the-induction-of-growth-arrest-and-is-apoptosis-independent
#2
Charlotte Lagler, Mohamed El-Mesery, Alexander Christian Kübler, Urs Dietmar Achim Müller-Richter, Thorsten Stühmer, Joachim Nickel, Thomas Dieter Müller, Harald Wajant, Axel Seher
Multiple myeloma (MM), a malignancy of the bone marrow, is characterized by a pathological increase in antibody-producing plasma cells and an increase in immunoglobulins (plasmacytosis). In recent years, bone morphogenetic proteins (BMPs) have been reported to be activators of apoptotic cell death in neoplastic B cells in MM. Here, we use bone morphogenetic protein 2 (BMP2) to show that the "apoptotic" effect of BMPs on human neoplastic B cells is dominated by anti-proliferative activities and cell cycle arrest and is apoptosis-independent...
2017: PloS One
https://www.readbyqxmd.com/read/29025761/genome-wide-association-study-to-find-modifiers-for-tetralogy-of-fallot-in-the-22q11-2-deletion-syndrome-identifies-variants-in-the-gpr98-locus-on-5q14-3
#3
Tingwei Guo, Gabriela M Repetto, Donna M McDonald McGinn, Jonathan H Chung, Hiroko Nomaru, Christopher L Campbell, Anna Blonska, Anne S Bassett, Eva W C Chow, Elisabeth E Mlynarski, Ann Swillen, Joris Vermeesch, Koen Devriendt, Doron Gothelf, Miri Carmel, Elena Michaelovsky, Maude Schneider, Stephan Eliez, Stylianos E Antonarakis, Karlene Coleman, Aoy Tomita-Mitchell, Michael E Mitchell, M Cristina Digilio, Bruno Dallapiccola, Bruno Marino, Nicole Philip, Tiffany Busa, Leila Kushan-Wells, Carrie E Bearden, Małgorzata Piotrowicz, Wanda Hawuła, Amy E Roberts, Flora Tassone, Tony J Simon, Esther D A van Duin, Thérèse A van Amelsvoort, Wendy R Kates, Elaine Zackai, H Richard Johnston, David J Cutler, A J Agopian, Elizabeth Goldmuntz, Laura E Mitchell, Tao Wang, Beverly S Emanuel, Bernice E Morrow
BACKGROUND: The 22q11.2 deletion syndrome (22q11.2DS; DiGeorge syndrome/velocardiofacial syndrome) occurs in 1 of 4000 live births, and 60% to 70% of affected individuals have congenital heart disease, ranging from mild to severe. In our cohort of 1472 subjects with 22q11.2DS, a total of 62% (n=906) have congenital heart disease and 36% (n=326) of these have tetralogy of Fallot (TOF), comprising the largest subset of severe congenital heart disease in the cohort. METHODS AND RESULTS: To identify common genetic variants associated with TOF in individuals with 22q11...
October 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/29025042/stage-specific-follicular-extracellular-vesicle-uptake-and-regulation-of-bovine-granulosa-cell-proliferation
#4
Wei-Ting Hung, Raphatphorn Navakanitworakul, Tarique Khan, Pan Zhang John S Davis, Lynda K McGinnis, Lane K Christenson
Follicular fluid within ovarian antral follicles contains numerous factors, which influence the development of a healthy oocyte including nucleic acids, steroids, proteins, and extracellular vesicles (EVs). Current evidence indicates that follicular EVs promote changes in cellular gene expression and support cumulus-oocyte-complex expansion in vitro. In this study, we found EVs from different sized follicles differentially stimulate granulosa cell proliferation and this could be explained by both the differential contents associated, on or within the vesicles and by the preferential uptake of EVs dependent on follicle size from which they were isolated...
August 28, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29024937/protein-biomarkers-predictive-for-response-to-anti-egfr-treatment-in-ras-wild-type-metastatic-colorectal-carcinoma
#5
Astrid Lièvre, Bérèngere Ouine, Jim Canet, Aurélie Cartier, Yael Amar, Wulfran Cacheux, Odette Mariani, Rosine Guimbaud, Janick Selves, Thierry Lecomte, Serge Guyetant, Ivan Bieche, Frédérique Berger, Leanne de Koning
BACKGROUND: Metastatic colorectal cancer (mCRC) patients with mutant KRAS or NRAS are ineligible for anti-epidermal growth factor receptor (anti-EGFR) therapy, as RAS mutations activate downstream pathways independently of EGFR and induce primary resistance. However, even among RAS wild-type (WT) patients, only a fraction responds to anti-EGFR therapy, suggesting that other mechanisms of resistance exist. We hypothesise that different (epi)genetic alterations can lead to primary anti-EGFR resistance and that the crucial end point is the activation of protein signalling pathways...
October 12, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29024496/higher-levels-of-cystatin-c-in-hiv-aids-patients-with-metabolic-syndrome
#6
Gordana Dragović, Danica Srdić, Khawla Al Musalhi, Ivan Soldatović, Jovana Kušić, Djordje Jevtović, Devaki Nair
Data about Cystatin-C levels in HIV-infected patients with metabolic syndrome (MetS) are still limited. Therefore, the aim of this study was to evaluate the possible correlations of serum levels of Cystatin-C in HIV/AIDS patients treated with combined antiretroviral therapy (cART) with or without MetS. This cross-sectional study included 89 HIV/AIDS Caucasian patients receiving cART at the HIV/AIDS Centre Belgrade, Serbia, divided into two groups according to the presence of MetS. Cystatin-C and other biochemical parameters were measured using Cytokine-Array-I, Metabolic-Array-I and Metabolic-Array-II, at the Department of Clinical Biochemistry, Royal Free Hospital and University College London, United Kingdom...
October 11, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29024073/developmental-stage-influences-chromosome-segregation-patterns-and-arrangement-in-the-extremely-polyploid-giant-bacterium-epulopiscium-sp-type-b
#7
Elizabeth Hutchison, Nicholas A Yager, May N Taw, Matthew Taylor, Francine Arroyo, David R Sannino, Esther R Angert
Few studies have described chromosomal dynamics in bacterial cells with more than two complete chromosome copies or described changes with respect to development in polyploid cells. We examined the arrangement of chromosomal loci in the very large, highly polyploid, uncultivated intestinal symbiont Epulopiscium sp. type B using fluorescent in situ hybridization (FISH). We found that in new offspring, chromosome replication origins (oriCs) are arranged in a three-dimensional array throughout the cytoplasm. As development progresses, most oriCs become peripherally located...
October 10, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/29024060/loss-of-dnmt3b-in-chondrocytes-leads-to-delayed-endochondral-ossification-and-fracture-repair
#8
Cuicui Wang, Yousef Abu-Amer, Regis J O'Keefe, Jie Shen
Despite advanced understanding of signaling mediated by local and systemic factors, the role of epigenetic factors in the regulation of bone regeneration remains vague. The DNA methyltransferases (Dnmts) Dnmt3a and Dnmt3b have tissue specific expression patterns and create unique methylation signatures to regulate gene expression. Using a stabilized murine tibia fracture model we find that Dnmt3b is induced early in fracture healing, peaks at 10 days post fracture (dpf), and declines to nearly undetectable levels by 28 dpf...
October 10, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29021694/korean-red-ginseng-extract-induces-angiogenesis-through-activation-of-glucocorticoid-receptor
#9
Wai-Nam Sung, Hoi-Hin Kwok, Man-Hee Rhee, Patrick Ying-Kit Yue, Ricky Ngok-Shun Wong
BACKGROUND: Our previous studies have demonstrated that ginsenoside-Rg1 can promote angiogenesis in vitro and in vivo through activation of the glucocorticoid receptor (GR). Furthermore, microRNA (miRNA) expression profiling has shown that Rg1 can modulate the expression of a subset of miRNAs to induce angiogenesis. Moreover, Rb1 was shown to be antiangiogenic through activation of a different pathway. These studies highlight the important functions of miRNAs on ginseng-regulated physiological processes...
October 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/29021294/identification-of-serological-biomarkers-for-early-diagnosis-of-lung-cancer-using-a-protein-array-based-approach
#10
Jianbo Pan, Guang Song, Dunyan Chen, Yadong Li, Shuang Liu, Shaohui Hu, Christian Rosa, Daniel J Eichinger, Ignacio Pino, Heng Zhu, Jiang Qian, Yi Huang
Lung cancer (LC) remains the leading cause of mortality from malignant tumors worldwide. Currently, a lack of serological biomarkers for early LC diagnosis is a major roadblock for early intervention and prevention of LC. To undertake this challenge, we employed a two-phase strategy to discover and validate a biomarker panel using a protein array-based approach. In Phase I, we obtained serological autoimmune profiles of 80 LC patients and 20 healthy subjects on HuProt arrays, and identified 170 candidate proteins significantly associated with LC...
October 11, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29021209/transcription-profiling-suggests-that-mitochondrial-topoisomerase-ib-acts-as-a-topological-barrier-and-regulator-of-mitochondrial-dna-transcription
#11
Ilaria Dalla Rosa, Hongliang Zhang, Salim Khiati, Xiaolin Wu, Yves Pommier
Mitochondrial DNA (mtDNA) is essential for cell viability because it encodes subunits of the respiratory chain complexes. Mitochondrial topoisomerase IB (TOP1MT) facilitates mtDNA replication by removing DNA topological tensions produced during mtDNA transcription, but appears to be dispensable. To test whether cells lacking TOP1MT have aberrant mtDNA transcription, we performed mitochondrial transcriptome profiling. To that end, we designed and implemented a customized tiling array, which enabled genome-wide, strand-specific, and simultaneous detection of all mitochondrial transcripts...
October 11, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29020998/proteomic-profiling-of-breast-cancer-metabolism-identifies-shmt2-and-asct2-as-prognostic-factors
#12
Stephan Bernhardt, Michaela Bayerlová, Martina Vetter, Astrid Wachter, Devina Mitra, Volker Hanf, Tilmann Lantzsch, Christoph Uleer, Susanne Peschel, Jutta John, Jörg Buchmann, Edith Weigert, Karl-Friedrich Bürrig, Christoph Thomssen, Ulrike Korf, Tim Beissbarth, Stefan Wiemann, Eva Johanna Kantelhardt
BACKGROUND: Breast cancer tumors are known to be highly heterogeneous and differences in their metabolic phenotypes, especially at protein level, are less well-understood. Profiling of metabolism-related proteins harbors the potential to establish new patient stratification regimes and biomarkers promoting individualized therapy. In our study, we aimed to examine the relationship between metabolism-associated protein expression profiles and clinicopathological characteristics in a large cohort of breast cancer patients...
October 11, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29019755/interstitial-lung-disease-in-children-made-easier%C3%A2-well-almost
#13
Thomas R Semple, Michael T Ashworth, Catherine M Owens
Interstitial lung disease (ILD) in pediatric patients is different from that in adults, with a vast array of pathologic conditions unique to childhood, varied modes of presentation, and a different range of radiologic appearances. Although rare, childhood ILD (chILD) is associated with significant morbidity and mortality, most notably in conditions of disordered surfactant function, with respiratory failure in 100% of neonates with surfactant protein B dysfunction and 100% mortality without lung transplantation...
October 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29018571/trail-dr5-ctsb-crosstalk-participates-in-breast-cancer-autophagy-initiated-by-saha
#14
Han Han, Hui Zhou, Jing Li, Xiuyan Feng, Dan Zou, Weiqiang Zhou
To investigate the ability of SAHA-induced TRAIL DR5-CTSB crosstalk to initiate the breast cancer autophagy, RTCA assay was performed to assess the effect of SAHA on breast cancer cells, and western blot and ELISA were used to verify the inductive effects on expression of CTSB. Breast cancer cells were transfected with TRAIL DR5 siRNA to block the function of TRAIL DR5. Cell viability and apoptosis of breast cancer cells were analyzed using a muse cell analyzer. The distribution of LC3-II in TRAIL DR5-silenced breast cancer cells treated with SAHA was observed by immunofluorescence microscopy, the mRNA levels of autophagy-related genes were detected by RNA microarray, and the activity of autophagy-related signaling pathways was screened by MAPK antibody array...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/29018282/emerging-roles-of-linker-histones-in-regulating-chromatin-structure-and-function
#15
REVIEW
Dmitry V Fyodorov, Bing-Rui Zhou, Arthur I Skoultchi, Yawen Bai
Together with core histones, which make up the nucleosome, the linker histone (H1) is one of the five main histone protein families present in chromatin in eukaryotic cells. H1 binds to the nucleosome to form the next structural unit of metazoan chromatin, the chromatosome, which may help chromatin to fold into higher-order structures. Despite their important roles in regulating the structure and function of chromatin, linker histones have not been studied as extensively as core histones. Nevertheless, substantial progress has been made recently...
October 11, 2017: Nature Reviews. Molecular Cell Biology
https://www.readbyqxmd.com/read/29017821/a-novel-c3d-containing-oligomeric-vaccine-provides-insight-into-the-viability-of-testing-human-c3d-based-vaccines-in-mice
#16
Yong-Gang He, Isabel Y Pappworth, Andreas Rossbach, Joshua Paulin, Tarirai Mavimba, Christine Hayes, Liudmila Kulik, V Michael Holers, Andrew M Knight, Kevin J Marchbank
The use of C3d, the final degradation product of complement protein C3, as a "natural" adjuvant has been widely examined since the initial documentation of its immunogenicity-enhancing properties as a consequence of binding to complement receptor 2. Subsequently it was demonstrated that these effects are most evident when oligomeric, rather than when monomeric forms of C3d, are linked to various test protein antigens. In this study, we examined the feasibility of enhancing the adjuvant properties of human C3d further by utilizing C4b-binding protein (C4BP) to provide an oligomeric arrayed scaffold fused to the model antigen, tetanus toxin C fragment (TTCF)...
October 4, 2017: Immunobiology
https://www.readbyqxmd.com/read/29017817/classification-of-%C3%AE-hairpin-repeat-proteins
#17
Daniel B Roche, Phuong Do Viet, Anastasia Bakulina, Layla Hirsh, Silvio C E Tosatto, Andrey V Kajava
In recent years, a number of new protein structures that possess tandem repeats have emerged. Many of these proteins are comprised of tandem arrays of β-hairpins. Today, the amount and variety of the data on these β-hairpin repeat (BHR) structures have reached a level that requires detailed analysis and further classification. In this paper, we classified the BHR proteins, compared structures, sequences of repeat motifs, functions and distribution across the major taxonomic kingdoms of life and within organisms...
October 7, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/29017607/non-digestible-oligosaccharides-directly-regulate-host-kinome-to-modulate-host-inflammatory-responses-without-alterations-in-the-gut-microbiota
#18
Richard Y Wu, Pekka Määttänen, Scott Napper, Erin Scruten, Bo Li, Yuhki Koike, Kathene C Johnson-Henry, Agostino Pierro, Laura Rossi, Steven R Botts, Michael G Surette, Philip M Sherman
BACKGROUND: Prebiotics are non-digestible food ingredients that enhance the growth of certain microbes within the gut microbiota. Prebiotic consumption generates immune-modulatory effects that are traditionally thought to reflect microbial interactions within the gut. However, recent evidence suggests they may also impart direct microbe-independent effects on the host, though the mechanisms of which are currently unclear. METHODS: Kinome arrays were used to profile the host intestinal signaling responses to prebiotic exposures in the absence of microbes...
October 10, 2017: Microbiome
https://www.readbyqxmd.com/read/29016848/mdm2-mediates-fmrp-and-gp1-mglur-dependent-protein-translation-and-neural-network-activity
#19
Dai-Chi Liu, Joseph Seimetz, Kwan Young Lee, Auinash Kalsotra, Hee Jung Chung, Hua Lu, Nien-Pei Tsai
Activating Group 1 (Gp1) metabotropic glutamate receptors (mGluRs), including mGluR1 and mGluR5, elicits translation-dependent neural plasticity mechanisms that are crucial to animal behavior and circuit development. Dysregulated Gp1 mGluR signaling has been observed in numerous neurological and psychiatric disorders. However, the molecular pathways underlying Gp1 mGluR-dependent plasticity mechanisms are complex and have been elusive. In this study, we identified a novel mechanism through which Gp1 mGluR mediates protein translation and neural plasticity...
October 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29016733/endothelial-to-haematopoietic-transition-contributes-to-pulmonary-arterial-hypertension
#20
Olin D Liang, Eui-Young So, Pamela C Egan, Laura R Goldberg, Jason M Aliotta, Keith Q Wu, Patrycja M Dubielecka, Corey E Ventetuolo, Anthony M Reginato, Peter J Quesenberry, James R Klinger
Aims: The pathogenic mechanisms of pulmonary arterial hypertension (PAH) remain unclear, but involve dysfunctional endothelial cells (ECs), dysregulated immunity and inflammation in the lung. We hypothesize that a developmental process called endothelial to haematopoietic transition (EHT) contributes to the pathogenesis of pulmonary hypertension (PH). We sought to determine the role of EHT in mouse models of PH, to characterize specific cell types involved in this process, and to identify potential therapeutic targets to prevent disease progression...
September 7, 2017: Cardiovascular Research
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