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https://www.readbyqxmd.com/read/28726630/dissection-of-specific-binding-of-hiv-1-gag-to-the-packaging-signal-in-viral-rna
#1
Mauricio Comas-Garcia, Siddhartha Ak Datta, Laura Baker, Rajat Varma, Prabhakar R Gudla, Alan Rein
Selective packaging of HIV-1 genomic RNA (gRNA) requires the presence of a cis-acting RNA element called the "packaging signal" (Ψ). However, the mechanism by which Ψ promotes selective packaging of the gRNA is not well understood. We used fluorescence correlation spectroscopy and quenching data to monitor the binding of recombinant HIV-1 Gag protein to Cy5-tagged 190-base RNAs. At physiological ionic strength, Gag binds with very similar, nanomolar affinities to both Ψ-containing and control RNAs. We challenged these interactions by adding excess competing tRNA; introducing mutations in Gag; or raising the ionic strength...
July 20, 2017: ELife
https://www.readbyqxmd.com/read/28636115/sirna-mediated-down-regulation-of-clic4-gene-inhibits-cell-proliferation-and-accelerates-cell-apoptosis-of-mouse-liver-cancer-hca-f-and-hca-p-cells
#2
Qiu-Yun Yu, Xin-Feng Zhou, Qing Xia, Jia Shen, Jia Yan, Jiu-Ting Zhu, Xiang Li, Ming Shu
This study explored the effects involved in silencing CLIC4 on apoptosis and proliferation of mouse liver cancer Hca-F and Hca-P cells. A CLIC4-target small interfering RNA (siRNA) was designed to compound into two individual complementary oligonucleotide chains. A process of annealing and connection to a pSilencer vector was followed by transfection with Hca-F and Hca-P cells. Quantitative real-time polymerase chain reaction and western blotting techniques were used to determine CLIC4 mRNA and protein expressions...
June 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28635671/rab33b-controls-hepatitis-b-virus-assembly-by-regulating-core-membrane-association-and-nucleocapsid-processing
#3
Christina Bartusch, Tatjana Döring, Reinhild Prange
Many viruses take advantage of cellular trafficking machineries to assemble and release new infectious particles. Using RNA interference (RNAi), we demonstrate that the Golgi/autophagosome-associated Rab33B is required for hepatitis B virus (HBV) propagation in hepatoma cell lines. While Rab33B is dispensable for the secretion of HBV subviral envelope particles, its knockdown reduced the virus yield to 20% and inhibited nucleocapsid (NC) formation and/or NC trafficking. The overexpression of a GDP-restricted Rab33B mutant phenocopied the effect of deficit Rab33B, indicating that Rab33B-specific effector proteins may be involved...
June 21, 2017: Viruses
https://www.readbyqxmd.com/read/28630804/diversity-analysis-of-gut-microbiota-in-osteoporosis-and-osteopenia-patients
#4
Jihan Wang, Yangyang Wang, Wenjie Gao, Biao Wang, Heping Zhao, Yuhong Zeng, Yanhong Ji, Dingjun Hao
Some evidence suggests that bone health can be regulated by gut microbiota. To better understand this, we performed 16S ribosomal RNA sequencing to analyze the intestinal microbial diversity in primary osteoporosis (OP) patients, osteopenia (ON) patients and normal controls (NC). We observed an inverse correlation between the number of bacterial taxa and the value of bone mineral density. The diversity estimators in the OP and ON groups were increased compared with those in the NC group. Beta diversity analyses based on hierarchical clustering and principal coordinate analysis (PCoA) could discriminate the NC samples from OP and ON samples...
2017: PeerJ
https://www.readbyqxmd.com/read/28628915/mir-495-promotes-senescence-of-mesenchymal-stem-cells-by-targeting-bmi-1
#5
Xiujun Li, Yuxian Song, Dan Liu, Jiaojiao Zhao, Jingjing Xu, Jing Ren, Yali Hu, Zhiqun Wang, Yayi Hou, Guangfeng Zhao
BACKGROUND/AIMS: Mesenchymal stem cells (MSCs) play an important role in regulating angiogenesis and immune balance. Abnormal proliferation and function of MSCs were reported at maternal fetal interface in patients with pre-eclampsia (PE). Micro-RNA-495 was known to be upregulated in the MSCs derived from patients with PE. However, it is not clear whether the up-regulated miR-495 is related to the pathogenesis of PE. METHODS: We analyzed the expression of miR-495 in MSCs and umbilical cords derived from healthy pregnancies (NC) and PE, then we upregulated or downregulated the expression of miR-495 in MSCs derived from NC and tested the proliferation, apoptosis, migration, invasion, tube formation and senescence...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28628529/appraising-viral-load-thresholds-and-adherence-support-recommendations-in-the-world-health-organization-guidelines-for-detection-and-management-of-virologic-failure
#6
Suzanne M McCluskey, Yap Boum, Nicholas Musinguzi, Jessica E Haberer, Jeffrey N Martin, Peter W Hunt, Vincent C Marconi, David R Bangsberg, Mark J Siedner
BACKGROUND: The World Health Organization defines HIV virologic failure as two consecutive viral loads >1,000 copies/mL, measured 3-6 months apart with interval adherence support. We sought to empirically evaluate these guidelines using data from an observational cohort. SETTING: The Uganda AIDS Rural Treatment Outcomes study observed adults with HIV in southwestern Uganda from the time of antiretroviral therapy (ART) initiation, and monitored adherence with electronic pill bottles...
June 15, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28618405/upregulation-of-circulating-mir-195-3p-in-heart-failure
#7
Xia He, Jun Ji, Tao Wang, Ming-Bang Wang, Xiao-Ling Chen
OBJECTIVES: Many circulating microRNAs (miRs) have been shown to have potential biomarker effects in cardiovascular disease. We studied the dysregulation of circulating miR-195-3p in patients with heart failure (HF) to elucidate its value as a potential biomarker for HF. METHODS: Eight ischemic HF (IHF) patients, 8 nonischemic HF patients (NIHF), and 8 healthy volunteers (matched by age and sex - normal controls [NCs]) were chosen for miR sequencing. The plasma RNA was extracted, and a small RNA library of HF was established and then sequenced using next-generation sequencing (NGS) technology...
June 16, 2017: Cardiology
https://www.readbyqxmd.com/read/28598903/self-reported-difficulties-with-everyday-function-cognitive-symptoms-and-cognitive-function-in-people-with-hiv
#8
Rosanna Laverick, Lewis Haddow, Marina Daskalopoulou, Fiona Lampe, Richard Gilson, Andrew Speakman, Andrea Antinori, Tina Bruun, Anna Vassilenko, Simon Collins, Alison Rodger
BACKGROUND: We determined factors associated with self-reported decline in activities of daily living (ADLs) and symptoms of cognitive impairment in HIV positive (HIV+) adults in five European clinics. METHODS: HIV+ adults underwent computerized and pen-and-paper neuropsychological tests and questionnaires of cognitive symptoms and ADLs. We considered cognitive function in five domains, psychosocial factors and clinical parameters as potentially associated with symptoms...
June 7, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28598082/-expression-of-micro-rna-218-in-cervical-cancer-and-its-effect-on-proliferation-apoptosis-and-invasion-of-hela-cells
#9
Yu-Rong Shi, Jian Liu, Wei He, Yin Yang
OBJECTIVES: To investigate the expression and clinical significance of microRNA-218(miR-218)in human cervical cancer and the effects ofmiR-218 on proliferation, cell apoptosis and invasion of HeLa cells. METHODS: QRT-PCR was used to detect the expression ofmiR-218 in 23 cases of normal cervical tissues and 114 cases of cervical cancer, and the relationship between the expression and the clinicopathological features was analyzed; HeLa cells were devided into three groups: non transfection (control group), transfected with empty liposomes negative control goup (NC group), transfected with miR-218 mimic (miR-218M group)...
September 2016: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28577495/knockdown-of-long-noncoding-rna-ghet1-inhibits-cell-activation-of-gastric-cancer
#10
Hui Huang, Wenjun Liao, Xueqiang Zhu, Hao Liu, Lijun Cai
OBJECTION: The aim of this study was to evaluate the effects of lncRNA GHET1 in developing of Gastric Cancer. METHODS: Collecting the 20 gastric cancer patients and evaluated the pathological of adjacent and tumor tissues by HE stating. We analyzed the protein expression of Numb in gastric cancer (GC) tissues by using IHC and the gene expression of Numb and GHET1 in adjacent and GC tissues by RT-PCR. The AGS cells were divided into 3 groups: Control (Co), NC and shRNA groups...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28539331/overexpression-oflongintergenicnoncoding-rna-linc00312inhibits-the-invasion-and-migration-of-thyroid-cancer-cells-by-down-regulating-microrna-197-3p
#11
Kai Liu, Wen Huang, Dan-Qing Yan, Qing Luo, Xiang Min
The study evaluated the ability of LINC00312 to influence the proliferation, invasion and migration of thyroid cancer (TC) cells by regulating microRNA-197-3p (miRNA-197-3p). TC  tissues and adjacent normal tissues were collected from 211 TC patients. K1 (papillary TC), SW579 (squamous TC) and 8505C (anaplastic TC) cell lines were assigned into a blank, negative control (NC), LINC00312 overexpression, miR-197-3p inhibitors and LINC00312 overexpression + miR-197-3p mimics group. The expression of LINC00312, miR-197-3p and p120 was measured using quantitative real time polymerase chain reaction (qRT-PCR) and western blotting...
May 24, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28516123/polysome-fractionation-to-analyze-mrna-distribution-profiles
#12
Amaresh C Panda, Jennifer L Martindale, Myriam Gorospe
Eukaryotic cells adapt to changes in external or internal signals by precisely modulating the expression of specific gene products. The expression of protein-coding genes is controlled at the transcriptional and post-transcriptional levels. Among the latter steps, the regulation of translation is particularly important in cellular processes that require rapid changes in protein expression patterns. The translational efficiency of mRNAs is altered by RNA-binding proteins (RBPs) and noncoding (nc)RNAs such as microRNAs (Panda et al...
February 5, 2017: Bio-protocol
https://www.readbyqxmd.com/read/28502297/-knock-down-of-cadherin-17-inhibits-proliferation-and-promote-apoptosis-in-noscapine-resistant-human-sw480-colon-cancer-cells
#13
Zheng Han, Xiaodong Huang, Meng Liu, Jie Tan, Qingxi Zhu, Yanfen Wang, Yishan Cai, Aifang Chen, Xia Tian
Objective To investigate the effects of cadherin 17 (CDH17) on the proliferation and apoptosis of noscapine-resistant human SW480 colon cancer cells. Methods The level of CDH17 in noscapine-resistant human SW480 colon cancer cells was knocked down by small interfering RNA (siRNA), and the silence was confirmed by Western blotting and real-time quantitative PCR. Transfected SW480 cells were treated with noscapine, and then the proliferation and cell viability of SW480 cells were measured by MTT assay and plate clone formation assay, respectively; the apoptosis of SW480 cells was detected by flow cytometry combined with annexinV-FITC/PI staining; the expressions of poly-ADP-ribose polymerase (PARP) and caspase-3 were determined by Western blotting...
May 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28487070/noncoding-rna-and-epigenetic-gene-regulation-in-renal-diseases
#14
REVIEW
Satya K Kota, Savithri B Kota
Kidneys have a major role in normal physiology and metabolic homeostasis. Loss or impairment of kidney function is a common occurrence in several metabolic disorders, including hypertension and diabetes. Chronic kidney disease (CKD) affect nearly 10% of the population worldwide; ranks 18th in the list of causes of death; and contributes to a significant proportion of healthcare costs. The tissue repair and regenerative potential of kidneys are limited and they decline during aging. Recent studies have demonstrated a key role for epigenetic processes and players, such as DNA methylation, histone modifications, noncoding (nc)RNA, and so on, in both kidney development and disease...
May 6, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28485503/role-of-small-interfering-rna-silencing-protein-kinase-c-%C3%AE-gene-on-the-occurrence-of-ultrafiltration-failure-in-peritoneal-dialysis-rats
#15
Zhi-Wei Sun, Jian Wang, Min Weng, Jian-Zhong Tang, Jun-Feng Wang, Jian Xu, Ling Lin, Hong-Ling Yuan
This study aims to explore the effect of PKC-α gene silencing on the occurrence of ultrafiltration failure (UFF) in peritoneal dialysis (PD) rats. Forty-eight male SD rats were collected to establish 5/6 renal resection uremic and uremic PD rats models. Rats were assigned into control, sham operation, uremia, PD-2 W (peritoneal dialysis for 2 weeks), PD-4 W (peritoneal dialysis for 4 weeks), negative control (NC) (peritoneal dialysis for 4 weeks, and injected 0.1 mg/kg blank plasmid into abdominal cavity) and PKC-α siRNA (peritoneal dialysis for 4 weeks, and injected 0...
May 9, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28472815/long-noncoding-rna-gas5-which-acts-as-a-tumor-suppressor-via-microrna-21-regulates-cisplatin-resistance-expression-in-cervical-cancer
#16
Qirong Wen, Yan Liu, Huabing Lyu, Xiaying Xu, Qingxia Wu, Ni Liu, Qi Yin, Juan Li, Xiujie Sheng
OBJECTIVES: The aims of this study were to investigate the functions of GAS5 as a tumor suppressor in cervical cancer and explore the mechanism. METHODS: The expression of GAS5 and microRNA 21 (miR-21) was detected in primary cervical cancer tissue specimens, as well as in cervical cancer cell lines. We identified the interaction of GAS5 and miR-21 by quantitative polymerase chain reaction, Western blot, and dual-luciferase reporter assay. We also studied the functions of GAS5 in proliferation, apoptosis, migration, and invasion in cervical cancer cells in vitro and vivo...
May 2, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28446240/molecular-mechanisms-by-which-herv-k-gag-interferes-with-hiv-1-gag-assembly-and-particle-infectivity
#17
Kazuaki Monde, Hiromi Terasawa, Yusuke Nakano, Ferri Soheilian, Kunio Nagashima, Yosuke Maeda, Akira Ono
BACKGROUND: Human endogenous retroviruses (HERVs), the remnants of ancient retroviral infections, constitute approximately 8% of human genomic DNA. Since HERV-K Gag expression is induced by HIV-1 Tat in T cells, induced HERV-K proteins could affect HIV-1 replication. Indeed, previously we showed that HERV-K Gag and HIV-1 Gag coassemble and that this appears to correlate with the effect of HERV-K Gag expression on HIV-1 particle release and its infectivity. We further showed that coassembly requires both MA and NC domains, which presumably serve as scaffolding for Gag via their abilities to bind membrane and RNA, respectively...
April 26, 2017: Retrovirology
https://www.readbyqxmd.com/read/28425921/plasma-micro-rna-alterations-appear-late-in-pancreatic-cancer
#18
Oskar Franklin, Pär Jonsson, Ola Billing, Erik Lundberg, Daniel Öhlund, Hanna Nyström, Christina Lundin, Henrik Antti, Malin Sund
OBJECTIVES: The aim of this research was to study whether plasma microRNAs (miRNA) can be used for early detection of pancreatic cancer (PC) by analyzing prediagnostic plasma samples collected before a PC diagnosis. BACKGROUND: PC has a poor prognosis due to late presenting symptoms and early metastasis. Circulating miRNAs are altered in PC at diagnosis but have not been evaluated in a prediagnostic setting. METHODS: We first performed an initial screen using a panel of 372 miRNAs in a retrospective case-control cohort that included early-stage PC patients and healthy controls...
January 3, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28410331/the-role-of-erbin-in-gts-21-regulating-inflammtory-responses-in-mdp-stimulated-macrophages
#19
Xiao-Jing Wu, Xu-Ming Yang, Xue-Min Song, Yang Xu, Jian-Guo Li, Yan-Lin Wang, Zong-Ze Zhang, Lin-Li Le, Hui Liang, Yin Zhang
OBJECTIVE: To explore the role of Erbin protein and nucleotide-binding oligomerization domain 2/receptor-interacting serine/threonine protein kinases (NOD2/RICK) in GTS-21 activating cholinergic anti-inflammatory pathway. METHODS: Experiments were randomly divided into four groups: normal control (NC) group, muramyl dipeptide (MDP) group, 10 μg/mL MDP, GTS-21 (GTS) group, 10 μg/mL MDP plus 50 μg/mL GTS-21 (α7 nAChRs agonist), Erbin shRNA interference (sh-Erbin) group: sh-Erbin RNA plus 10 μg/mL MDP and 50 μg/mL GTS-21...
May 2017: Shock
https://www.readbyqxmd.com/read/28402921/mir-155-promotes-cell-proliferation-and-inhibits-apoptosis-by-pten-signaling-pathway-in-the-psoriasis
#20
Longjiang Xu, Hong Leng, Xin Shi, Jiang Ji, Jinxiang Fu, Hong Leng
MicroRNAs (miRNAs) have been demonstrated to contribute to malignant progression in psoriasis development. The purposes of the study was to evaluated the effects of miRNA-155 on cell proliferation, migration and apoptosis in psoriasis development via PTEN singaling pathway and identify its direct target protein. Quantitative real-time RT-PCR (qRT-PCR) was performed to examine the level of miR-155 in psoriasis cells, miR-155 was downregulated in a psoriasis cell line Hacat by transfected with small interfering RNA (siRNA), respectively...
June 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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