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https://www.readbyqxmd.com/read/28723896/maternal-h3k27me3-controls-dna-methylation-independent-imprinting
#1
Azusa Inoue, Lan Jiang, Falong Lu, Tsukasa Suzuki, Yi Zhang
Mammalian sperm and oocytes have different epigenetic landscapes and are organized in different fashions. After fertilization, the initially distinct parental epigenomes become largely equalized with the exception of certain loci, including imprinting control regions. How parental chromatin becomes equalized and how imprinting control regions escape from this reprogramming is largely unknown. Here we profile parental allele-specific DNase I hypersensitive sites in mouse zygotes and morula embryos, and investigate the epigenetic mechanisms underlying these allelic sites...
July 19, 2017: Nature
https://www.readbyqxmd.com/read/28723886/prolonged-viral-replication-and-longitudinal-viral-dynamic-differences-among-respiratory-syncytial-virus-rsv-infected-infants
#2
Monica E Brint, Joshua M Hughes, Aditya Shah, Chelsea R Miller, Lisa G Harrison, Elizabeth A Meals, Jacqueline Blanch, Charlotte R Thompson, Stephania A Cormier, John P DeVincenzo
BACKGROUND: Longitudinal RSV dynamics have not been well-studied despite existence of factors favoring prolonged RSV replication including: high mutation rates allowing rapid evolution and potential escape from immune control. We therefore measured viral load in previously RSV-naïve infants over prolonged time-spans. METHODS: During 2014-2015, quantitative nasal aspirates were collected from 51 RSV-PCR+ infants. Multiple parallel assessments of viral loads were quantified at each collected time point using a well-validated real-time qRT-PCR assay...
July 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28723666/increased-cflip-expression-in-thymic-epithelial-tumors-blocks-autophagy-via-nf-%C3%AE%C2%BAb-signalling
#3
Djeda Belharazem, Albert Grass, Cornelia Paul, Mario Vitacolonna, Berthold Schalke, Ralf J Rieker, Daniel Körner, Philipp Jungebluth, Katja Simon-Keller, Peter Hohenberger, Eric M Roessner, Karsten Wiebe, Thomas Gräter, Thomas Kyriss, German Ott, Peter Geserick, Martin Leverkus, Philipp Ströbel, Alexander Marx
The anti-apoptotic cellular FLICE-like inhibitory protein cFLIP plays a pivotal role in normal tissues homoeostasis and the development of many tumors, but its role in normal thymus (NT), thymomas and thymic carcinomas (TC) is largely unknown.Expression, regulation and function of cFLIP were analyzed in biopsies of NT, thymomas, thymic squamous cell carcinomas (TSCC), thymic epithelial cells (TECs) derived thereof and in the TC line 1889c by qRT-PCR, western blot, shRNA techniques, and functional assays addressing survival, senescence and autophagy...
February 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28722104/the-double-edge-to-parasite-escape-invasive-host-is-less-infected-but-more-infectable
#4
Carolyn L Keogh, Osamu Miura, Tomohiro Nishimura, James E Byers
Non-native species that escape their native range parasites may benefit not only from reduced infection pathology, but also from relaxed selection on costly immune defenses, promoting reallocation of resources towards growth or reproduction. However, benefits accruing from a reduction in defense could come at the cost of increased infection susceptibility. We conducted common garden studies of the shore crab Hemigrapsus sanguineus from highly-parasitized native (Japan) populations and largely parasite-free invasive (USA) populations to test for differences in susceptibility to infection by native-range rhizocephalan parasites, and to explore differences in host resource allocation...
July 19, 2017: Ecology
https://www.readbyqxmd.com/read/28721051/effectiveness-of-amisulpride-in-chinese-patients-with-predominantly-negative-symptoms-of-schizophrenia-a-subanalysis-of-the-escape-study
#5
Ying Liang, Xin Yu
BACKGROUND: Effective management strategies for the negative symptoms of schizophrenia remain an unmet need, and data on the use of antipsychotics in this population are scarce, particularly in Chinese patients. Therefore, we investigated amisulpride for the treatment of Chinese patients with predominantly negative symptoms of schizophrenia. METHODS: This post hoc subanalysis of the prospective Effectiveness and Safety of Amisulpride in Chinese Patients with Schizophrenia (ESCAPE) study included adult Chinese patients with an International Classification of Diseases-10 diagnosis of schizophrenia and predominantly negative symptoms, who received amisulpride for 8 weeks...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28720859/increased-male-male-mounting-behaviour-in-desert-locusts-during-infection-with-an-entomopathogenic-fungus
#6
Lisa M Clancy, Amy L Cooper, Gareth W Griffith, Roger D Santer
Same-sex sexual behaviour occurs across diverse animal taxa, but adaptive explanations can be difficult to determine. Here we investigate male-male mounting (MMM) behaviour in female-deprived desert locust males infected with the entomopathogenic fungus Metarhizium acridum. Over a four-week period, infected locusts performed more MMM behaviours than healthy controls. Among infected locusts, the probability of MMM, and the duration of time spent MMM, significantly increased with the mounting locust's proximity to death...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719632/viscum-album-neutralizes-tumor-induced-immunosuppression-in-a-human-in-vitro-cell-model
#7
Carmen Steinborn, Amy Marisa Klemd, Ann-Sophie Sanchez-Campillo, Sophie Rieger, Marieke Scheffen, Barbara Sauer, Manuel Garcia-Käufer, Konrad Urech, Marie Follo, Annekathrin Ücker, Gunver Sophia Kienle, Roman Huber, Carsten Gründemann
Tumor cells have the capacity to secrete immunosuppressive substances in order to diminish dendritic cell (DC) activity and thereby escape from immune responses. The impact of mistletoe (Viscum album) extracts (VAE), which are frequently used as an additive anti-cancer therapy to stimulate the immune response, is still unknown. Using a human cellular system, the impact of two different VAE (VAEA + VAEI) on the maturation of human dendritic cells and on T cell function has been investigated using flow cytometry, automated fluorescence microscopy and cytokine bead array assays...
2017: PloS One
https://www.readbyqxmd.com/read/28718425/nlrc5-cita-a-key-player-in-cancer-immune-surveillance
#8
REVIEW
Sayuri Yoshihama, Saptha Vijayan, Tabasum Sidiq, Koichi S Kobayashi
Cancer cells need to escape immune surveillance for successful tumor growth. Loss of MHC class I has been described as a major immune evasion strategy in many cancers. MHC class I transactivator (CITA), NLRC5 [nucleotide-binding domain and leucine-rich repeats containing (NLR) family, caspase activation and recruitment domain (CARD) domain containing 5], is a key transcription coactivator of MHC class I genes. Recent genetic studies have revealed that NLRC5 is a major target for cancer immune evasion mechanisms...
January 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28718404/emerging-role-of-the-unfolded-protein-response-in-tumor-immunosurveillance
#9
REVIEW
Hélène Vanacker, Jessica Vetters, Lyvia Moudombi, Christophe Caux, Sophie Janssens, Marie-Cécile Michallet
Disruption of endoplasmic reticulum (ER) homeostasis results in ER stress and activation of the unfolded protein response (UPR). This response alleviates cell stress, and is activated in both tumor cells and tumor infiltrating immune cells. The UPR plays a dual function in cancer biology, acting as a barrier to tumorigenesis at the premalignant stage, while fostering cancer maintenance in established tumors. In infiltrating immune cells, the UPR has been involved in both immunosurveillance and immunosuppressive functions...
July 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28718394/multiple-possible-inaccuracies-cast-doubt-on-a-recent-report-suggesting-selective-serotonin-reuptake-inhibitors-to-be-toxic-and-ineffective
#10
Fredrik Hieronymus, Alexander Lisinski, Jakob Näslund, Elias Eriksson
According to a systematic review on the use of selective serotonin reuptake inhibitors (SSRIs) in adult depression that was recently published in BMC Psychiatry, the results of which have been widely disseminated in lay media, these drugs increase the risk for serious adverse events (SAEs) while exerting poor antidepressant efficacy. A cursory analysis, however, suggests the analysis of SAEs conducted by the authors to be marred by both methodological inaccuracies and blatant errors. After having corrected for these apparent mistakes, we conducted a sensitivity analysis in which we also accounted for a possible moderating effect of age; while this suggests SSRIs to be safe drugs in the non-elderly, they do confirm what is already known, that is, that they may enhance the risk for SAEs in the old...
July 18, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/28718342/reconsidering-the-roles-of-gratitude-and-indebtedness-in-social-exchange
#11
Cong Peng, Rob M A Nelissen, Marcel Zeelenberg
Receiving favors is often a mixed blessing and commonly triggers two emotions: the positive emotion gratitude and negative emotion indebtedness. In three studies, we examined the hypothesis that gratitude and indebtedness have distinct functions in social exchange. Contrary to current views, we believe that the function of gratitude does not primarily reside in facilitating social exchange. Instead, we propose that indebtedness motivates people to repay favours received, and thus accounts for most of the prosocial effects commonly attributed to gratitude...
July 18, 2017: Cognition & Emotion
https://www.readbyqxmd.com/read/28718331/entinostat-for-the-treatment-of-breast-cancer
#12
Dario Trapani, Angela Esposito, Carmen Criscitiello, Luca Mazzarella, Marzia Locatelli, Ida Minchella, Saverio Minucci, Giuseppe Curigliano
Breast cancer accounts for 29% of malignant tumors. It is an heterogenous disease covering a spectrum of different molecular subtypes. Epigenetic aberrations may affect gene expression through DNA and histone proteins modifications thus promoting tumor progression and resistance to anti- tumor treatment. Area covered: This article explores the potential role of entinostat in the treatment of breast cancer. The clinical trials evaluating entinostat are discussed, highlighting preclinical data and early-phase clinical studies results...
July 18, 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28718015/capable-and-credible-challenging-nutrition-science
#13
EDITORIAL
Bart Penders, Anna Wolters, Edith F Feskens, Fred Brouns, Machteld Huber, Els L M Maeckelberghe, Gerjan Navis, Theo Ockhuizen, Jogchum Plat, Jan Sikkema, Marianne Stasse-Wolthuis, Pieter van 't Veer, Marcel Verweij, Jan de Vries
Nutrition science has enriched our understanding of how to stay healthy by producing valuable knowledge about the interaction of nutrients, food, and the human body. Nutrition science also has raised societal awareness about the links between food consumption and well-being, and provided the basis for food regulations and dietary guidelines. Its collaborative and interdisciplinary research has accomplished much, scientifically and socially. Despite this, nutrition science appears to be in crisis and is currently confronted with a public reluctance to trust nutritional insights...
July 17, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28717595/egg-clutch-dehydration-induces-early-hatching-in-red-eyed-treefrogs-agalychnis-callidryas
#14
María José Salica, James R Vonesh, Karen M Warkentin
Terrestrial eggs have evolved repeatedly in tropical anurans exposing embryos to the new threat of dehydration. Red-eyed treefrogs, Agalychnis callidryas, lay eggs on plants over water. Maternally provided water allows shaded eggs in humid sites to develop to hatching without rainfall, but unshaded eggs and those in less humid sites can die from dehydration. Hatching responses of amphibian eggs to dry conditions are known from two lineages with independent origins of terrestrial eggs. Here, we experimentally tested for dehydration-induced early hatching in another lineage (Agalychnis callidryas, Phyllomedusidae), representing a third independent origin of terrestrial eggs...
2017: PeerJ
https://www.readbyqxmd.com/read/28717009/acetylation-on-histone-h3-lysine-9-mediates-a-switch-from-transcription-initiation-to-elongation
#15
Leah A Gates, Jiejun Shi, Aarti D Rohira, Qin Feng, Bokai Zhu, Mark T Bedford, Cari A Sagum, Sung Yun Jung, Jun Qin, Ming-Jer Tsai, Sophia Y Tsai, Wei Li, Charles E Foulds, Bert W O'Malley
The transition from transcription initiation to elongation is a key regulatory step in gene expression, which requires RNA polymerase II (Pol II) to escape promoter proximal pausing on chromatin. While elongation factors promote pause release leading to transcription elongation, the role of epigenetic modifications during this critical transition step is poorly understood. Two histone marks on histone H3, lysine 4 trimethylation (H3K4me3) and lysine 9 acetylation (H3K9ac), co-localize on active gene promoters and are associated with active transcription...
July 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28716761/recent-developments-for-introducing-a-hexafluoroisopropanol-unit-into-the-vitamin-d-side-chain
#16
REVIEW
Fumihiro Kawagoe, Toru Sugiyama, Motonari Uesugi, Atsushi Kittaka
Among numerous studies on synthetic approaches to and the biological activities of vitamin D analogues, we herein focused on falecalcitriol, an analogue of calcitriol (1α,25-dihydroxyvitamin D3), in which a 26,26,26,27,27,27-hexafluoroisopropanol unit has been introduced into the side chain. Falecalcitriol was designed to escape from the metabolism of CYP24A1 and has been used as a drug to treat secondary hypoparathyroidism since 2001. Its metabolite, the 23-hydroxy form, retains biological activity and resistants to further metabolism...
July 14, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28716195/quantitative-assessment-of-social-and-economic-impact-of-african-swine-fever-outbreaks-in-northern-uganda
#17
Erika Chenais, Sofia Boqvist, Ulf Emanuelson, Claudia von Brömssen, Emily Ouma, Tonny Aliro, Charles Masembe, Karl Ståhl, Susanna Sternberg-Lewerin
African swine fever (ASF) is one of the most important pig diseases, causing high case fatality rate and trade restrictions upon reported outbreaks. In Uganda, a low-income country with the largest pig population in East Africa, ASF is endemic. Animal disease impact is multidimensional and include social and economic impact along the value chain. In low-income settings, this impact keep people poor and push those that have managed to escape poverty back again. If the diseases can be controlled, their negative consequences can be mitigated...
September 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28715972/defensins-in-viral-infection-and-pathogenesis
#18
Mayumi K Holly, Karina Diaz, Jason G Smith
α, β, and ω defensins are effectors of the innate immune system with potent antibacterial, antiviral, and antifungal activity. Defensins have direct antiviral activity in cell culture, with varied mechanisms for individual viruses, although some common themes have emerged. In addition, defensins have potent immunomodulatory activity that can alter innate and adaptive immune responses to viral infection. In some cases, there is evidence for paradoxical escape from defensin neutralization or enhancement of viral infection...
July 17, 2017: Annual Review of Virology
https://www.readbyqxmd.com/read/28714960/bin1-reverses-pd-l1-mediated-immune-escape-by-inactivating-the-c-myc-and-egfr-mapk-signaling-pathways-in-non-small-cell-lung-cancer
#19
J Wang, Y Jia, S Zhao, X Zhang, X Wang, X Han, Y Wang, M Ma, J Shi, L Liu
Non-small cell lung cancer (NSCLC) is one of the most common and malignant carcinoma worldwide, and the incidence and mortality are increasing rapidly. Immunotherapy targeting programmed death 1/programmed death ligand 1 (PD-L1) signaling has shown prominent clinical effects in treating NSCLC; however, a poor understanding of the associated regulating molecular mechanisms of PD-L1 has become one of the biggest obstacles for further improving efficacy. Bridging integrator-1 (BIN1) can regulate numerous cancer-related molecules to exert multiple tumor-suppressing effects by either interacting or not interacting with c-MYC...
July 17, 2017: Oncogene
https://www.readbyqxmd.com/read/28714571/domestication-and-fitness-in-the-wild-a-multivariate-view
#20
Jarle Tufto
Domesticated species continually escaping and interbreeding with wild relatives impose a migration load on wild populations. As domesticated stocks become increasingly different as a result of artificial and natural selection in captivity, fitness of escapees in the wild is expected to decline, reducing the effective rate of migration into wild populations. Recent theory suggest that this may alleviate and eventually eliminate the resulting migration load. I develop a multivariate model of trait and wild fitness evolution resulting from the joint effects of artificial and natural selection in the captive environment...
July 17, 2017: Evolution; International Journal of Organic Evolution
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