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https://www.readbyqxmd.com/read/29046057/bile-duct-ligature-in-young-rats-a-revisited-animal-model-for-biliary-atresia
#1
Matias Garrido, Camila Escobar, Constanza Zamora, Carolina Rejas, Juan Varas, Mario Párraga, Sebastian San Martin, Sandra Montedónico
Biliary atresia leads to cirrhosis in the vast majority of patients and constitutes the first cause of paediatric liver transplantation. Animal models allow us to understand the molecular basis and natural history of diseases. The aim of this study is to describe a surgically created animal model of biliary atresia with emphasis in long-term liver function. Forty-two 3-week-old Sprague-Dawley rats were randomly divided into two groups: bile duct ligature (BDL) and control. The animals were sacrificed on the 2nd, 4th, and 6th postoperative weeks...
September 13, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29046054/porphyromonas-gingivalis-lipopolysaccharide-stimulation-in-human-periodontal-ligament-stem-cells-role-of-epigenetic-modifications-to-the-inflammation
#2
Francesca Diomede, Soundara Rajan Thangavelu, Ilaria Merciaro, Monica D'Orazio, Placido Bramanti, Emanuela Mazzon, Oriana Trubiani
Periodontitis is a chronic oral inflammatory disease produced by bacteria. Gingival retraction and bone and connective tissues resorption are the hallmarks of this disease. Chronic periodontitis may contribute to the risk of onset or progression of neuroinflammatory pathological conditions, such as Alzheimer's disease. The main goal of the present study was to investigate if the role of epigenetic modulations is involved in periodontitis using human periodontal ligament stem cells (hPDLSCs) as an in vitro model system...
August 25, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29046049/treatment-of-diabetic-foot-ulcers-with-therapeutic-magnetic-resonance-tmr%C3%A2-improves-the-quality-of-granulation-tissue
#3
Letizia Ferroni, Chiara Gardin, Andrea De Pieri, Maria Sambataro, Elena Seganfreddo, Chiara Goretti, Elisabetta Iacopi, Barbara Zavan, Alberto Piaggesi
Diabetic foot ulcers (DFUs) often result in severely adverse outcomes, such as serious infections, hospitalization, and lower extremity amputations. In last few years, to improve the outcome of DFUs, clinicians and researchers put their attention on the application of low intensity pulsating electro-magnetic fields through Therapeutic Magnetic Resonance (TMR®). In our study, patients with DFUs have been divided into two groups: The Sham Group treated with non-functioning TMR® device, and the Active Group treated with a functioning device...
August 7, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29046044/lipidomics-profiling-reveals-the-role-of-glycerophospholipid-metabolism-in-psoriasis
#4
Chunwei Zeng, Bo Wen, Guixue Hou, Li Lei, Zhanlong Mei, Xuekun Jia, Xiaomin Chen, Wu Zhu, Jie Li, Yehong Kuang, Weiqi Zeng, Juan Su, Siqi Liu, Cong Peng, Xiang Chen
Psoriasis is a common and chronic inflammatory skin disease that is complicated by gene-environment interactions. Although genomic, transcriptomic, and proteomic analyses have been performed to investigate the pathogenesis of psoriasis, the role of metabolites in psoriasis, particularly of lipids, remains unclear. Lipids not only comprise the bulk of the cellular membrane bilayers but also regulate a variety of biological processes such as cell proliferation, apoptosis, immunity, angiogenesis, and inflammation...
October 1, 2017: GigaScience
https://www.readbyqxmd.com/read/29046014/tomato-cry1a-plays-a-critical-role-in-the-regulation-of-phytohormone-homeostasis-plant-development-and-carotenoid-metabolism-in-fruits
#5
Chao-Chao Liu, Golam Jalal Ahammed, Guo-Ting Wang, Chang-Jie Xu, Kun-Song Chen, Yan-Hong Zhou, Jing-Quan Yu
Blue light photoreceptors, cryptochromes (CRYs), regulate multiple aspects of plant growth and development. However, our knowledge of CRYs is predominantly based on model plant Arabidopsis at early growth stage. In this study, we elucidated functions of CRY1a gene in mature tomato (Solanum lycopersicum) plants by using cry1a mutants and CRY1a overexpressing lines (OE-CRY1a-1 and OE-CRY1a-2). In comparison with wild-type plants, cry1a mutants are relatively tall, accumulate low biomass and bear more fruits, whereas OE-CRY1a plants are short stature, and they not only flower lately but also bear less fruits...
October 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29045979/-changes-of-serum-krebs-von-den-lungen-6-levels-in-interstitial-lung-disease-associated-with-dermatomyositis-and-secondary-sj%C3%A3-gren-s-syndrome-a-case-report
#6
J F Yu, Y B Jin, J He, Y An, Z G Li
Interstitial lung diseases (ILDs) are a diverse group of pulmonary disorders characterized by various patterns of inflammation and fibrosis in the interstitium of the lung. The underlying pathogenesis of ILDs is complex and associated with multiple rheumatologic conditions, such as systemic sclerosis, rheumatoid arthritis, pollymyositis and dermatomyositis, Sjögren's syndrome, and systemic lupus erythematosus. As the disease progresses, excessive pulmonary fibrosis impairs alveolar gas exchange and damages pulmonary function...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045977/-clinical-and-genetic-characteristics-of-williams-beuren-syndrome-2-cases-report
#7
S Q Wang, Z X Yang, H Li
To explore the clinical and genetic characteristics of Williams-Beuren syndrome (WBS) and to raise awareness of the disease. The characteristics of clinical manifestations, personal history, cardiac ultrasound, brain magnetic resonance imaging (MRI), electroencephalogram (EEG) and chromosome detection results of two cases with WBS were analyzed. The two patients were both male and the age was 11 months and 1 day, and 9 months and 9 days, respectively. They both suffered from cardiovascular malformation: case one presented supravalvular aortic stenosis, and case two showed atrial septal defect and patent ductus arteriosus...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045954/-pulmonary-arterial-hypertension-as-leading-manifestation-of-methylmalonic-aciduria-clinical-characteristics-and-gene-testing-in-15-cases
#8
X Q Liu, H Yan, J X Qiu, C Y Zhang, J G Qi, X Zhang, H J Xiao, Y L Yang, Y H Chen, J B DU
OBJECTIVE: To deepen our understanding of Methylmalonic aciduria (MMA) associated pulmonary hypertension (PH) by analyzing the characteristics of clinical presentation, pulmonary high resolusion CT(HRCT), treatment response and gene mutation. METHODS: This study includes 15 cases of pediatric patients with MMA associated PH diagnosed and treated in Peking University First Hospital pediatric department between May 2012 and May 2016 with symptoms of PH as their leading presentation...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045953/-detection-of-large-deletions-in-x-linked-alport-syndrome-using-competitive-multiplex-fluorescence-polymerase-chain-reaction
#9
F Wang, Y Q Zhang, J Ding, L X Yu
OBJECTIVE: To evaluate the ability of multiplex competitive fluorescence polymerase chain reaction in detection of large deletion and duplication genotypes of X-linked Alport syndrome. METHODS: Clinical diagnosis of X-linked Alport syndrome was based on either abnormal staining of type IV collagen α5 chain in the epidermal basement membrane alone or with abnormal staining of type IV collagen α5 chain in the glomerular basement membrane and Bowman's capsule/ultrastructural changes in the glomerular basement membrane typical of Alport syndrome...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045940/mir-124-attenuates-osteoclastogenic-differentiation-of-bone-marrow-monocytes-via-targeting-rab27a
#10
Lian Tang, Yiran Yin, Juncai Liu, Zhong Li, Xiaobo Lu
BACKGROUND/AIMS: With the aging population increases, senile osteoporosis has become a global public health problem. Previous evidence has shown that miR-124 has important effects on the occurrence and development of osteoporosis. However, the role of miR-124 in the process of osteoclastogenesis is still obscure. METHODS: First of all, we measured the expression level of miR-124 in bone marrow monocytes (BMMs) of osteoporotic mice (ovariectomized mice: OVX). Next, we evaluated the alteration of miR-124 during osteoclast differentiation of BMMs...
October 18, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29045932/modulation-of-sestrin-confers-protection-to-cr-vi-induced-neuronal-cell-death-in-drosophila-melanogaster
#11
Pallavi Singh, D Kar Chowdhuri
Increased oxidative stress is one of the major causes of hexavalent chromium [Cr(VI)], a heavy metal with diverse applications and environmental presence, induced neuronal adversities in exposed organism including Drosophila. Sestrin (sesn), an oxidative stress responsive gene, emerges as a novel player in the management of oxidative stress response. It is reported to be regulated by Target of rapamycin (TOR) and the former regulates autophagy and plays an important role in the prevention of neurodegeneration...
October 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29045927/alkaline-ph-shock-enhanced-production-of-validamycin-a-in-fermentation-of-streptomyces-hygroscopicus
#12
Jing Jiang, Ya-Fang Sun, Xi Tang, Chao-Nan He, Ye-Lin Shao, Ya-Jie Tang, Wen-Wen Zhou
Validamycin A (Val-A) is produced by Streptomyces as a secondary metabolite with wide agricultural applications of controlling rice sheath blight, false smut and damping-off diseases. The effect of alkaline pH shock on enhancing Val-A production and its mechanism were investigated. A higher yield of Val-A was achieved by NaOH shock once or several times together with faster protein synthesis and sugar consumption and alkaline pH shock can increase Val-A production by 27.43%. Transcription of genes related to amino acid metabolism, carbon metabolism and electron respiratory chain was significantly up-regulated, accompanied by the substantial increase of respiratory activity and glutamate concentration...
October 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29045905/transcriptional-reprogramming-during-effector-to-memory-transition-renders-cd4-t-cells-permissive-for-latent-hiv-1-infection
#13
Liang Shan, Kai Deng, Hongbo Gao, Sifei Xing, Adam A Capoferri, Christine M Durand, S Alireza Rabi, Gregory M Laird, Michelle Kim, Nina N Hosmane, Hung-Chih Yang, Hao Zhang, Joseph B Margolick, Linghua Li, Weiping Cai, Ruian Ke, Richard A Flavell, Janet D Siliciano, Robert F Siliciano
The latent reservoir for HIV-1 in resting memory CD4(+) T cells is the major barrier to curing HIV-1 infection. Studies of HIV-1 latency have focused on regulation of viral gene expression in cells in which latent infection is established. However, it remains unclear how infection initially becomes latent. Here we described a unique set of properties of CD4(+) T cells undergoing effector-to-memory transition including temporary upregulation of CCR5 expression and rapid downregulation of cellular gene transcription...
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29045899/early-transcriptional-divergence-marks-virus-specific-primary-human-cd8-t-cells-in-chronic-versus-acute-infection
#14
David Wolski, Peter K Foote, Diana Y Chen, Lia L Lewis-Ximenez, Catherine Fauvelle, Jasneet Aneja, Andreas Walker, Pierre Tonnerre, Almudena Torres-Cornejo, Daniel Kvistad, Sabrina Imam, Michael T Waring, Damien C Tully, Todd M Allen, Raymond T Chung, Jörg Timm, W Nicholas Haining, Arthur Y Kim, Thomas F Baumert, Georg M Lauer
Distinct molecular pathways govern the differentiation of CD8(+) effector T cells into memory or exhausted T cells during acute and chronic viral infection, but these are not well studied in humans. Here, we employed an integrative systems immunology approach to identify transcriptional commonalities and differences between virus-specific CD8(+) T cells from patients with persistent and spontaneously resolving hepatitis C virus (HCV) infection during the acute phase. We observed dysregulation of metabolic processes during early persistent infection that was linked to changes in expression of genes related to nucleosomal regulation of transcription, T cell differentiation, and the inflammatory response and correlated with subject age, sex, and the presence of HCV-specific CD4(+) T cell populations...
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29045898/peptidoglycan-sensing-receptors-trigger-the-formation-of-functional-amyloids-of-the-adaptor-protein-imd-to-initiate-drosophila-nf-%C3%AE%C2%BAb-signaling
#15
Anni Kleino, Nancy F Ramia, Gunes Bozkurt, Yanfang Shen, Himani Nailwal, Jing Huang, Johanna Napetschnig, Monique Gangloff, Francis Ka-Ming Chan, Hao Wu, Jixi Li, Neal Silverman
In the Drosophila immune response, bacterial derived diaminopimelic acid-type peptidoglycan binds the receptors PGRP-LC and PGRP-LE, which through interaction with the adaptor protein Imd leads to activation of the NF-κB homolog Relish and robust antimicrobial peptide gene expression. PGRP-LC, PGRP-LE, and Imd each contain a motif with some resemblance to the RIP Homotypic Interaction Motif (RHIM), a domain found in mammalian RIPK proteins forming functional amyloids during necroptosis. Here we found that despite sequence divergence, these Drosophila cryptic RHIMs formed amyloid fibrils in vitro and in cells...
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29045896/microbes-rev-up-host-metabolism-around-the-clock
#16
Geoffrey N Pronovost, Elaine Y Hsiao
There is increasing evidence that the microbiome regulates host metabolism, but specific mechanisms underlying these interactions remain poorly understood. In a recent paper in Science, Wang et al. (2017) reveal that the gut microbiota regulates the expression of circadian-clock genes to impact host lipid metabolism and body composition.
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29045868/identification-and-characterization-of-an-inside-out-folding-intermediate-of-t4-phage-sliding-clamp
#17
Manika Indrajit Singh, Vikas Jain
Protein folding process involves formation of transiently occurring intermediates that are difficult to isolate and characterize. It is both necessary and interesting to characterize the structural conformations adopted by these intermediates, also called molten globules (MG), to understand protein folding. Here, we investigated the equilibrium (un)folding intermediate state of T4 phage gene product 45 (gp45, also known as DNA polymerase processivity factor or sliding clamp) obtained during chemical denaturation...
October 17, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29045849/a-synthetic-oligo-library-and-sequencing-approach-reveals-an-insulation-mechanism-encoded-within-bacterial-%C3%AF-54-promoters
#18
Lior Levy, Leon Anavy, Oz Solomon, Roni Cohen, Michal Brunwasser-Meirom, Shilo Ohayon, Orna Atar, Sarah Goldberg, Zohar Yakhini, Roee Amit
We use an oligonucleotide library of >10,000 variants to identify an insulation mechanism encoded within a subset of σ(54) promoters. Insulation manifests itself as reduced protein expression for a downstream gene that is expressed by transcriptional readthrough. It is strongly associated with the presence of short CT-rich motifs (3-5 bp), positioned within 25 bp upstream of the Shine-Dalgarno (SD) motif of the silenced gene. We provide evidence that insulation is triggered by binding of the ribosome binding site (RBS) to the upstream CT-rich motif...
October 17, 2017: Cell Reports
https://www.readbyqxmd.com/read/29045848/single-molecule-sequencing-reveals-the-chromosome-scale-genomic-architecture-of-the-nematode-model-organism-pristionchus-pacificus
#19
Christian Rödelsperger, Jan M Meyer, Neel Prabh, Christa Lanz, Felix Bemm, Ralf J Sommer
The nematode Pristionchus pacificus is an established model for integrative evolutionary biology and comparative studies with Caenorhabditis elegans. While an existing genome draft facilitated the identification of several genes controlling various developmental processes, its high degree of fragmentation complicated virtually all genomic analyses. Here, we present a de novo genome assembly from single-molecule, long-read sequencing data consisting of 135 P. pacificus contigs. When combined with a genetic linkage map, 99% of the assembly could be ordered and oriented into six chromosomes...
October 17, 2017: Cell Reports
https://www.readbyqxmd.com/read/29045845/revealing-the-determinants-of-widespread-alternative-splicing-perturbation-in-cancer
#20
Yongsheng Li, Nidhi Sahni, Rita Pancsa, Daniel J McGrail, Juan Xu, Xu Hua, Jasmin Coulombe-Huntington, Michael Ryan, Boranai Tychhon, Dhanistha Sudhakar, Limei Hu, Michael Tyers, Xiaoqian Jiang, Shiaw-Yih Lin, M Madan Babu, Song Yi
It is increasingly appreciated that alternative splicing plays a key role in generating functional specificity and diversity in cancer. However, the mechanisms by which cancer mutations perturb splicing remain unknown. Here, we developed a network-based strategy, DrAS-Net, to investigate more than 2.5 million variants across cancer types and link somatic mutations with cancer-specific splicing events. We identified more than 40,000 driver variant candidates and their 80,000 putative splicing targets deregulated in 33 cancer types and inferred their functional impact...
October 17, 2017: Cell Reports
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