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https://www.readbyqxmd.com/read/28538980/downregulation-of-lysyl-oxidase-protects-retinal-endothelial-cells-from-high-glucose-induced-apoptosis
#1
Dongjoon Kim, Robert P Mecham, Philip C Trackman, Sayon Roy
Purpose: To investigate the effect of reducing high glucose (HG)-induced lysyl oxidase (LOX) overexpression and increased activity on retinal endothelial cell apoptosis. Methods: Rat retinal endothelial cells (RRECs) were grown in normal (N) or HG (30 mM glucose) medium for 7 days. In parallel, RRECs were grown in HG medium and transfected with LOX small interfering RNA (siRNA), scrambled siRNA as control, or exposed to β-aminopropionitrile (BAPN), a LOX inhibitor...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28538188/identification-and-characterization-of-a-class-of-malat1-like-genomic-loci
#2
Bin Zhang, Yuntao S Mao, Sarah D Diermeier, Irina V Novikova, Eric P Nawrocki, Tom A Jones, Zsolt Lazar, Chang-Shung Tung, Weijun Luo, Sean R Eddy, Karissa Y Sanbonmatsu, David L Spector
The MALAT1 (Metastasis-Associated Lung Adenocarcinoma Transcript 1) gene encodes a noncoding RNA that is processed into a long nuclear retained transcript (MALAT1) and a small cytoplasmic tRNA-like transcript (mascRNA). Using an RNA sequence- and structure-based covariance model, we identified more than 130 genomic loci in vertebrate genomes containing the MALAT1 3' end triple-helix structure and its immediate downstream tRNA-like structure, including 44 in the green lizard Anolis carolinensis. Structural and computational analyses revealed a co-occurrence of components of the 3' end module...
May 23, 2017: Cell Reports
https://www.readbyqxmd.com/read/28537914/epigenomic-study-identifies-a-novel-mesenchyme-homeobox2-gli1-transcription-axis-involved-in-cancer-drug-resistance-overall-survival-and-therapy-prognosis-in-lung-cancer-patients
#3
Leonel Armas-López, Patricia Piña-Sánchez, Oscar Arrieta, Enrique Guzman de Alba, Blanca Ortiz-Quintero, Patricio Santillán-Doherty, David C Christiani, Joaquín Zúñiga, Federico Ávila-Moreno
Several homeobox-related gene (HOX) transcription factors such as mesenchyme HOX-2 (MEOX2) have previously been associated with cancer drug resistance, malignant progression and/or clinical prognostic responses in lung cancer patients; however, the mechanisms involved in these responses have yet to be elucidated. Here, an epigenomic strategy was implemented to identify novel MEOX2 gene promoter transcription targets and propose a new molecular mechanism underlying lung cancer drug resistance and poor clinical prognosis...
May 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28535628/-expression-and-clinical-significance-of-long-non-coding-rna-ccat1-in-gastric-cancer
#4
T Shan, Y G Chen, B Hong, H Zhou, J Z Xia
Objective: To investigate the expression and clinical significance of long non-coding RNA colon cancer associated transcript-1 (CCAT1) in gastric cancer (GC), and to further explore the effect of CCAT1 on cell proliferation of GC. Methods: The mRNA expressions of CCAT1 in GC tissues and matched adjacent normal tissues from 62 patients who received resection for gastric carcinoma between January 2013 and May 2015 in Nanjing Medical University Affiliated Wuxi Second Hospital and expressions in GC cell lines were assessed by quantitative real-time PCR (qRT-PCR)...
May 16, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28535592/stream-salinization-and-fungal-mediated-leaf-decomposition-a-microcosm-study
#5
Cristina Canhoto, Sara Simões, Ana Lúcia Gonçalves, Lúcia Guilhermino, Felix Bärlocher
Salinization is of major global concern due to its effect on stream biota, and ecosystem functions and services. In small streams, litter decomposition is a key ecosystem-level process driven by decomposers, mainly fungi (aquatic hyphomycetes), which link litter and invertebrates. Here we assessed the effects of an environmentally relevant range of salt additions (0, 2, 4, 8, 16gL(-1) NaCl) on (1) fungal growth and species-specific reproductive output and (2) fungal mediated-decomposition of Quercus robur leaves...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535511/capn4-enhances-osteopontin-expression-through-activation-of-the-wnt-%C3%AE-catenin-pathway-to-promote-epithelial-ovarian-carcinoma-metastasis
#6
Xiaoming Yang, Jing Sun, Dandan Xia, Xupei Can, Lei Liu, Jing Zhang, Huali Xu, Na Du, Wenxue Liu, Fangqian Shen, Zhenbo Zhang, Yunyan Sun, Xiaowei Xi
BACKGROUND AND AIM: Increasing evidence shows that the calpain regulatory subunit Capn4 can modulate the proliferation and metastasis of cancer cells, and plays an important role in the development of malignant tumors. However, there is no information on the clinical significance of Capn4 in epithelial ovarian carcinoma (EOC) or the molecular mechanisms by which Capn4 promotes the growth and metastasis of EOC. Therefore, the aim of this study was to clarify the role of Capn4 in EOC. METHODS: We evaluated Capn4 and osteopontin (OPN) expression in EOC cell lines and tissues from patients with ovarian cancer by western blotting and immunohistochemical analysis...
May 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28535500/transient-receptor-potential-vanilloid-5-mediates-ca2-influx-and-inhibits-chondrocyte-autophagy-in-a-rat-osteoarthritis-model
#7
Yingliang Wei, Yanfang Wang, Yutong Wang, Lunhao Bai
BACKGROUND: Autophagy, a self-protective mechanism of chondrocytes, has become a promising target to impede the progress of osteoarthritis (OA). Autophagy is regulated by cytosolic Ca2+ activity and may thus be modified by the Ca2+ permeable transient receptor potential channel vanilloid 5 (TRPV5). Therefore, we investigated the potential role of TRPV5 in mediating Ca2+ influx and in inhibiting chondrocyte autophagy in a rat OA model. METHODS: The rat OA model was assessed by macroscopic and histological analyses...
May 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28535388/transgenerational-inheritance-perpetuating-rnai
#8
Kristen C Brown, Taiowa A Montgomery
Reversible changes in gene expression independent of the genetic code can be transmitted from one generation to the next via poorly understood mechanisms. In worms, a histone-modifying enzyme is necessary to keep small RNA-guided transgenerational gene silencing in check.
May 22, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28535387/cellular-homeostasis-a-small-rna-at-the-crossroads-of-iron-and-photosynthesis
#9
Marie-Claude Carrier, Jean-Sébastien Bourassa, Eric Massé
The cyanobacterium Synechocystis relies on iron to perform oxygenic photosynthesis. This makes Synechocystis particularly sensitive to iron starvation. A new study shows that the small RNA IsaR1 is a major effector of the iron-stress response, remodeling the photosynthetic apparatus.
May 22, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28535386/sex-differences-satellite-dna-directs-male-specific-gene-expression
#10
Patrick M Ferree
Dosage compensation in some animals involves up-regulation of genes on the male's X chromosome. A study in the fruit fly Drosophila melanogaster shows that satellite DNA, and corresponding small non-coding RNA, helps the dosage compensation machinery preferentially find X sequences.
May 22, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28535287/a-flow-cytometry-based-screen-identifies-mbnl1-modulators-that-rescue-splicing-defects-in-myotonic-dystrophy-type-i
#11
Fan Zhang, Nicole E Bodycombe, Keith M Haskell, Yumei L Sun, Eric T Wang, Carl A Morris, Lyn H Jones, Lauren D Wood, Mathew T Pletcher
Myotonic Dystrophy Type 1 (DM1) is a rare genetic disease caused by expansion of CTG trinucleotide repeats ((CTG)exp) in the 3' untranslated region of the DMPK gene. The repeat transcripts sequester the RNA binding protein Muscleblind-like protein 1 (MBNL1) and hamper its normal function in pre-mRNA splicing. Overexpressing exogenous MBNL1 in the DM1 mouse model has been shown to rescue the splicing defects and reverse myotonia. Although a viable therapeutic strategy, pharmacological modulators of MBNL1 expression have not been identified...
May 23, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28535155/elevated-apobec3b-expression-drives-a-kataegic-like-mutation-signature-and-replication-stress-related-therapeutic-vulnerabilities-in-p53-defective-cells
#12
Jenni Nikkilä, Rahul Kumar, James Campbell, Inger Brandsma, Helen N Pemberton, Fredrik Wallberg, Kinga Nagy, Ildikó Scheer, Beata G Vertessy, Artur A Serebrenik, Valentina Monni, Reuben S Harris, Stephen J Pettitt, Alan Ashworth, Christopher J Lord
BACKGROUND: Elevated APOBEC3B expression in tumours correlates with a kataegic pattern of localised hypermutation. We assessed the cellular phenotypes associated with high-level APOBEC3B expression and the influence of p53 status on these phenotypes using an isogenic system. METHODS: We used RNA interference of p53 in cells with inducible APOBEC3B and assessed DNA damage response (DDR) biomarkers. The mutational effects of APOBEC3B were assessed using whole-genome sequencing...
May 23, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28534988/p21-activated-protein-kinase-1-induces-the-invasion-of-gastric-cancer-cells-through-c-jun-nh2-terminal-kinase-mediated-activation-of-matrix-metalloproteinase-2
#13
Liang-Hui Li, Guo-Yang Wu, Yi-Zhuo Lu, Xue-Hua Chen, Bing-Ya Liu, Min-Hua Zheng, Jian-Chun Cai
Gastric cancer (GC) is one of the most common malignancies worldwide. The prognosis of GC is poor, mostly due to widespread metastasis. p21-activated kinase 1 (Pak1), the best characterized member of an evolutionarily conserved family of serine/threonine kinases, plays an important role in the regulation of cell morphogenesis, motility, mitosis and angiogenesis. By qRT-PCR and Gelatin zymograph assay, we demonstrated in the present study that stable overexpression of Pak1 induced matrix metalloproteinase (MMP)-2 mRNA expression and activity in the human MKN45 GC cell line...
May 16, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28534955/long-non%C3%A2-coding-rna-ab019562-promotes-cell-proliferation-and-metastasis-in-human-hepatocellular-carcinoma
#14
Fan Wu, Jie Li, Xin Du, Weisan Zhang, Ping Lei, Qiang Zhang
Increasing evidence has supported the prognostic and therapeutic values of long non-coding RNAs (LncRNAs) in human tumorigenesis. Hepatocellular carcinoma (HCC), as one of the most refractory diseases, continues to warrant investigation for novel clues to enable early diagnosis. In the present study, the role of LncRNA AB019562 in cell proliferation and metastasis was investigated in HCC. Reverse transcription‑quantitative polymerase chain reaction analysis was performed to determine the expression of AB019562 in clinical HCC samples and cultured HCC cells...
May 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28534888/hepatitis-a-outbreaks-in-european-homosexual-men
#15
Pablo Barreiro, Vicente Soriano
Hepatitis A virus (HAV) is a small RNA, non-enveloped agent predominantly transmitted via the fecal/oral route through person-to-person contact or contaminated food and water. The mean incubation period is 28 days (range: 15-50). Acute hepatitis A is always self-limited and very rarely fatal. Moreover, it never progresses to chronicity. Acutely infected persons are most likely to transmit HAV before the onset of jaundice, when viral particle concentration in stool is highest.
May 23, 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28534229/production-of-a-gonadotropin-releasing-hormone-2-receptor-knockdown-gnrhr2-kd-swine-line
#16
A T Desaulniers, R A Cederberg, G A Mills, C A Lents, B R White
Swine are the only livestock species that produce both the second mammalian isoform of gonadotropin-releasing hormone (GNRH2) and its receptor (GNRHR2). Previously, we reported that GNRH2 and GNRHR2 mediate LH-independent testosterone secretion from porcine testes. To further explore this ligand-receptor complex, a pig model with reduced GNRHR2 expression was developed. Small hairpin RNA sequences targeting porcine GNRHR2 were subcloned into a lentiviral-based vector, lentiviral particles were generated and microinjected into the perivitelline space of zygotes, and embryos were transferred into a recipient...
May 22, 2017: Transgenic Research
https://www.readbyqxmd.com/read/28534195/identification-of-a-small-molecule-that-facilitates-the-differentiation-of-human-ipscs-escs-and-mouse-embryonic-pancreatic-explants-into-pancreatic-endocrine-cells
#17
Yasushi Kondo, Taro Toyoda, Ryo Ito, Michinori Funato, Yoshiya Hosokawa, Satoshi Matsui, Tomomi Sudo, Masahiro Nakamura, Chihiro Okada, Xiaotong Zhuang, Akira Watanabe, Akira Ohta, Nobuya Inagaki, Kenji Osafune
AIMS/HYPOTHESIS: Pancreatic beta-like cells generated from human induced pluripotent stem cells (hiPSCs) or human embryonic stem cells (hESCs) offer an appealing donor tissue source. However, differentiation protocols that mainly use growth factors are costly. Therefore, in this study, we aimed to establish efficient differentiation protocols to change hiPSCs/hESCs to insulin (INS)(+) cells using novel small-molecule inducers. METHODS: We screened small molecules that increased the induction rate of INS(+) cells from hESC-derived pancreatic and duodenal homeobox 1 (PDX1)(+) pancreatic progenitor cells...
May 22, 2017: Diabetologia
https://www.readbyqxmd.com/read/28533682/polyethylene-glycol-poly-%C3%AE%C2%B5-benzyloxycarbonyl-l-lysine-conjugated-vegf-sirna-for-antiangiogenic-gene-therapy-in-hepatocellular-carcinoma
#18
Gangmin Wang, XiaoLong Gao, GuoJun Gu, ZhiHong Shao, MingHua Li, PeiJun Wang, JianRong Yang, XiaoJun Cai, YongYong Li
A polyethylene glycol-poly(ε-benzyloxycarbonyl-l-lysine) (PEG-SS-PLL) block copolymer based on a disulfide-linked, novel biodegradable catiomer bearing a PEG-sheddable shell was developed to avoid "PEG dilemma" in nanoparticle intracellular tracking of PEG-PLL where PEG was nondegradable. However, PEG-SS-PLL catiomers have not been used to deliver small interfering VEGF RNA (siVEGF) in antiangiogenesis gene therapy. In this study, we aimed to investigate whether this novel biodegradable catiomer can deliver siVEGF into cancer cells and at the same time have an antitumor effect in a xenograft mouse model...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28532601/a-replication-competent-foot-and-mouth-disease-virus-expressing-a-luciferase-reporter
#19
Fuquan Zhang, Eva Perez-Martin, Nick Juleff, Bryan Charleston, Julian Seago
Bioluminescence is a powerful tool in the study of viral infection both in vivo and in vitro. Foot-and-mouth disease virus (FMDV) has a small RNA genome with a limited tolerance to foreign RNA entities. There has been no success in making a reporter FMDV expressing a luciferase in infected cell culture supernatants. We report here for the first time a replication-competent FMDV encoding Nanoluciferase, named as Nano-FMDV. Nano-FMDV is genetically stable during serial passages in cells and exhibits growth kinetics and plaque morphology similar to its parental virus...
May 19, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28532517/expression-of-cocaine-and-amphetamine-regulated-transcript-cart-in-hen-ovary
#20
Pengfei Li, Xuejing Yu, Jianshan Xie, Xiaolei Yao, Wenzhong Liu, Jianbo Yao, Zhiwei Zhu, Lihua Lyu
BACKGROUND: Cocaine- and amphetamine-regulated transcript (CART), discovered initially by via differential display RT-PCR analysis of brains of rats administered cocaine, is expressed mainly in central nervous system or neuronal origin cells, and is involved in a wide range of behaviors, such as regulation of food intake, energy homeostasis, and reproduction. The hens egg-laying rate mainly depends on the developmental status of follicles, expression of CART have not been identified from hen follicles, the regulatory mechanisms of CART biological activities are still unknown...
May 22, 2017: Biological Research
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