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https://www.readbyqxmd.com/read/29346712/synergetic-effects-of-prenatal-and-postnatal-high-sucrose-intake-on-glucose-tolerance-and-hepatic-insulin-resistance-in-rat-offspring
#1
Pengjie Zhang, Di Zhu, Yueming Zhang, Lingjun Li, Xionghui Chen, Wenna Zhang, Ruixiu Shi, Jianying Tao, Bing Han, Zhice Xu
SCOPE: High sucrose intake during pregnancy is linked to type 2 diabetes mellitus and altered insulin resistance. METHODS AND RESULTS: This study attempted to ascertain whether prenatal high sucrose intake (20% sucrose) alleviates the detrimental effects of high postnatal sugar consumption in the offspring, and the molecular mechanisms were investigated using a rat model. High prenatal sucrose exposure increased the body weight of the offspring at 1 to 3 weeks of age...
January 18, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29346609/decreased-serum-levels-of-ghrelin-and-brain-derived-neurotrophic-factor-in-premenopausal-women-with-metabolic-syndrome
#2
Masoumeh Jabbari, Sorayya Kheirouri, Mohammad Alizadeh
Objective: We aimed to investigate the association between serum levels of ghrelin and brain-derived neurotrophic factor (BDNF) with MetS and its components in premenopausal women. Methods: 43 patients with MetS and 43 healthy controls participated in this study. Participants' body mass index (BMI), waist circumference (WC), systolic and diastolic blood pressure (SBP and DBP) were measured. Serum levels of total cholesterol (TC), triglyceride (TG), low and high density lipoprotein cholesterol (LDL-C and HDL-C), fasting blood sugar (FBS), insulin, BDNF and ghrelin determined...
January 12, 2018: Laboratory Medicine
https://www.readbyqxmd.com/read/29346581/melatonin-attenuates-lung-ischaemia-reperfusion-injury-via-inhibition-of-oxidative-stress-and-inflammation
#3
Ming-Liang Wang, Chun-Hua Wei, Wen-Dong Wang, Jia-Shun Wang, Jun Zhang, Jian-Jun Wang
OBJECTIVES: Lung ischaemia-reperfusion injury is a complex pathophysiological process due to the production of reactive oxygen species and the generation of inflammatory reaction. We investigated the protective effects and the corresponding mechanism of melatonin (MT), a potent free-radical scavenger, on lung injury induced by ischaemia-reperfusion in a mouse model. METHODS: Adult male C57BL/6J mice (n = 30) were randomly and equally allocated into 5 groups: sham controls, IR, IR + 10 mg/kg MT, IR + 20 mg/kg MT and IR + 30 mg/kg MT...
January 15, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29346580/smoking-sex-and-non-small-cell-lung-cancer-steroid-hormone-receptors-in-tumor-tissue-s0424
#4
Ting-Yuan David Cheng, Amy K Darke, Mary W Redman, Gary R Zirpoli, Warren Davis, Rochelle Payne Ondracek, Wiam Bshara, Angela R Omilian, Robert Kratzke, Mary E Reid, Julian R Molina, Jill M Kolesar, Yuhchyau Chen, Robert M MacRae, James Moon, Philip Mack, David R Gandara, Karen Kelly, Regina M Santella, Kathy S Albain, Christine B Ambrosone
Background: To what extent steroid hormones contribute to lung cancer in male and female never smokers and smokers is unclear. We examined expression of hormone receptors in lung tumors by sex and smoking. Methods: Patients with primary non-small cell lung cancer were recruited into an Intergroup study in the United States and Canada, led by SWOG (S0424). Tumors from 813 cases (450 women and 363 men) were assayed using immunohistochemistry for estrogen receptor (ER)-α, ER-β, progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2)...
January 13, 2018: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29346563/lc3-immunostaining-in-the-inferior-olivary-nuclei-of-cats-with-niemann-pick-disease-type-c1-is-associated-with-patterned-purkinje-cell-loss
#5
Brittney L Gurda, Jessica H Bagel, Samantha J Fisher, Mark L Schultz, Andrew P Lieberman, Peter Hand, Charles H Vite, Gary P Swain
The feline model of Niemann-Pick disease, type C1 (NPC1) recapitulates the clinical, neuropathological, and biochemical abnormalities present in children with NPC1. The hallmarks of disease are the lysosomal storage of unesterified cholesterol and multiple sphingolipids in neurons, and the spatial and temporal distribution of Purkinje cell death. In feline NPC1 brain, microtubule-associated protein 1 light chain 3 (LC3) accumulations, indicating autophagosomes, were found within axons and presynaptic terminals...
January 13, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29346560/aggregation-and-travelling-wave-dynamics-in-a-two-population-model-of-cancer-cell-growth-and-invasion
#6
Vasiliki Bitsouni, Dumitru Trucu, Mark A J Chaplain, Raluca Eftimie
Cells adhere to each other and to the extracellular matrix (ECM) through protein molecules on the surface of the cells. The breaking and forming of adhesive bonds, a process critical in cancer invasion and metastasis, can be influenced by the mutation of cancer cells. In this paper, we develop a nonlocal mathematical model describing cancer cell invasion and movement as a result of integrin-controlled cell-cell adhesion and cell-matrix adhesion, for two cancer cell populations with different levels of mutation...
January 15, 2018: Mathematical Medicine and Biology: a Journal of the IMA
https://www.readbyqxmd.com/read/29346549/transcriptome-and-functional-analysis-in-a-drosophila-model-of-ngly1-deficiency-provides-insight-into-therapeutic-approaches
#7
Katie G Owings, Joshua B Lowry, Yiling Bi, Matthew Might, Clement Y Chow
Autosomal recessive loss-of-function mutations in N-Glycanase 1 (NGLY1) cause NGLY1 deficiency, the only known human disease of deglycosylation. Patients present with developmental delay, movement disorder, seizures, liver dysfunction, and alacrima. NGLY1 is a conserved cytoplasmic component of the Endoplasmic Reticulum Associated Degradation (ERAD) pathway. ERAD clears misfolded proteins from the ER lumen. However, it is unclear how loss of NGLY1 function impacts ERAD and other cellular processes and results in the constellation of problems associated with NGLY1 deficiency...
January 15, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29346439/interspecies-diversity-of-chloride-channel-regulators-calcium-activated-3-genes
#8
Lars Mundhenk, Nancy A Erickson, Nikolai Klymiuk, Achim D Gruber
Members of the chloride channel regulators, calcium-activated (CLCA) family, have been implicated in diverse biomedical conditions, including chronic inflammatory airway diseases such as asthma, chronic obstructive pulmonary disease, and cystic fibrosis, the activation of macrophages, and the growth and metastatic spread of tumor cells. Several observations, however, could not be repeated across species boundaries and increasing evidence suggests that select CLCA genes are particularly prone to dynamic species-specific evolvements...
2018: PloS One
https://www.readbyqxmd.com/read/29346419/saxs-analysis-of-a-soluble-cytosolic-ngbr-construct-including-extracellular-and-transmembrane-domains
#9
Joshua Holcomb, Maysaa Doughan, Nicholas Spellmon, Brianne Lewis, Emerson Perry, Yingxue Zhang, Lindsey Nico, Junmei Wan, Srinivas Chakravarthy, Weifeng Shang, Qing Miao, Timothy Stemmler, Zhe Yang
The Nogo-B receptor (NgBR) is involved in oncogenic Ras signaling through directly binding to farnesylated Ras. It recruits farnesylated Ras to the non-lipid-raft membrane for interaction with downstream effectors. However, the cytosolic domain of NgBR itself is only partially folded. The lack of several conserved secondary structural elements makes this domain unlikely to form a complete farnesyl binding pocket. We find that inclusion of the extracellular and transmembrane domains that contain additional conserved residues to the cytosolic region results in a well folded protein with a similar size and shape to the E...
2018: PloS One
https://www.readbyqxmd.com/read/29346417/xylose-donor-transport-is-critical-for-fungal-virulence
#10
Lucy X Li, Carsten Rautengarten, Joshua L Heazlewood, Tamara L Doering
Cryptococcus neoformans, an AIDS-defining opportunistic pathogen, is the leading cause of fungal meningitis worldwide and is responsible for hundreds of thousands of deaths annually. Cryptococcal glycans are required for fungal survival in the host and for pathogenesis. Most glycans are made in the secretory pathway, although the activated precursors for their synthesis, nucleotide sugars, are made primarily in the cytosol. Nucleotide sugar transporters are membrane proteins that solve this topological problem, by exchanging nucleotide sugars for the corresponding nucleoside phosphates...
January 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29346415/acute-multi-sgrna-knockdown-of-keops-complex-genes-reproduces-the-microcephaly-phenotype-of-the-stable-knockout-zebrafish-model
#11
Tilman Jobst-Schwan, Johanna Magdalena Schmidt, Ronen Schneider, Charlotte A Hoogstraten, Jeremy F P Ullmann, David Schapiro, Amar J Majmundar, Amy Kolb, Kaitlyn Eddy, Shirlee Shril, Daniela A Braun, Annapurna Poduri, Friedhelm Hildebrandt
Until recently, morpholino oligonucleotides have been widely employed in zebrafish as an acute and efficient loss-of-function assay. However, off-target effects and reproducibility issues when compared to stable knockout lines have compromised their further use. Here we employed an acute CRISPR/Cas approach using multiple single guide RNAs targeting simultaneously different positions in two exemplar genes (osgep or tprkb) to increase the likelihood of generating mutations on both alleles in the injected F0 generation and to achieve a similar effect as morpholinos but with the reproducibility of stable lines...
2018: PloS One
https://www.readbyqxmd.com/read/29346393/computational-study-of-hiv-gp120-as-a-target-for-polyanionic-entry-inhibitors-exploiting-the-v3-loop-region
#12
Louis R Hollingsworth, Anne M Brown, Richard D Gandour, David R Bevan
Multiple approaches are being utilized to develop therapeutics to treat HIV infection. One approach is designed to inhibit entry of HIV into host cells, with a target being the viral envelope glycoprotein, gp120. Polyanionic compounds have been shown to be effective in inhibiting HIV entry, with a mechanism involving electrostatic interactions with the V3 loop of gp120 being proposed. In this study, we applied computational methods to elucidate molecular interactions between the repeat unit of the precisely alternating polyanion, Poly(4,4'-stilbenedicarboxylate-alt-maleic acid) (DCSti-alt-MA) and the V3 loop of gp120 from strains of HIV against which these polyanions were previously tested (IIIb, BaL, 92UG037, JR-CSF) as well as two strains for which gp120 crystal structures are available (YU2, 2B4C)...
2018: PloS One
https://www.readbyqxmd.com/read/29346371/identification-of-novel-leishmanicidal-molecules-by-virtual-and-biochemical-screenings-targeting-leishmania-eukaryotic-initiation-factor-4a
#13
Emna Harigua-Souiai, Yosser Zina Abdelkrim, Imen Bassoumi-Jamoussi, Ons Zakraoui, Guillaume Bouvier, Khadija Essafi-Benkhadir, Josette Banroques, Nathan Desdouits, Hélène Munier-Lehmann, Mourad Barhoumi, N Kyle Tanner, Michael Nilges, Arnaud Blondel, Ikram Guizani
Leishmaniases are neglected parasitic diseases in spite of the major burden they inflict on public health. The identification of novel drugs and targets constitutes a research priority. For that purpose we used Leishmania infantum initiation factor 4A (LieIF), an essential translation initiation factor that belongs to the DEAD-box proteins family, as a potential drug target. We modeled its structure and identified two potential binding sites. A virtual screening of a diverse chemical library was performed for both sites...
January 18, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29346315/dietary-total-prenylflavonoids-from-the-fruits-of-psoralea-corylifolia-l-prevents-age-related-cognitive-deficits-and-down-regulates-alzheimer-s-markers-in-samp8-mice
#14
Zhi-Jing Chen, Yan-Fang Yang, Ying-Tao Zhang, Dong-Hui Yang
Alzheimer's disease (AD) is a serious threat for the aging society. In this study, we examined the preventive effect of the total prenylflavonoids (TPFB) prepared from the dried fruits of Psoralea corylifolia L., using an age-related AD mouse model SAMP8. We found that long-term dietary TPFB at 50 mg/kg·day significantly improved cognitive performance of the SAMP8 mice in Morris water maze tests, similar to 150 mg/kg·day of resveratrol, a popular neuro-protective compound. Furthermore, TPFB treatment showed significant improvements in various AD markers in SAMP8 brains, which were restored to near control levels of the normal mice, SAMR1...
January 18, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29346139/blood-biomarkers-for-evaluation-of-perinatal-encephalopathy-state-of-the-art
#15
Ernest M Graham, Allen D Everett, Jean-Christophe Delpech, Frances J Northington
PURPOSE OF REVIEW: The rapid progress in biomarker science is on the threshold of significantly changing clinical care for infants in the neonatal ICU. Infants with neonatal brain injuries will likely be the first group whose management is dramatically altered with point-of-care, rapidly available brain biomarker analysis. Providing an interim update on progress in this area is the purpose of this review. RECENT FINDINGS: Highlighted findings from the past 18 months of publications on biomarkers in neonatal brain injury include; Specific nonbrain markers of cardiac health and global asphyxia continue to provide information on brain injury after hypoxic-ischemic encephalopathy (HIE)...
January 17, 2018: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/29345990/imaging-mrna-in-vivo-from-birth-to-death
#16
Evelina Tutucci, Nathan M Livingston, Robert H Singer, Bin Wu
RNA is the fundamental information transfer system in the cell. The ability to follow single messenger RNAs (mRNAs) from transcription to degradation with fluorescent probes gives quantitative information about how the information is transferred fromDNAto proteins. This review focuses on the latest technological developments in the field of single-mRNA detection and their usage to study gene expression in both fixed and live cells. By describing the application of these imaging tools, we follow the journey of mRNA from transcription to decay in single cells, with single-molecule resolution...
January 18, 2018: Annual Review of Biophysics
https://www.readbyqxmd.com/read/29345928/physicochemical-properties-of-whey-protein-stabilized-astaxanthin-nanodispersion-and-its-transport-via-caco-2-monolayer
#17
Xue Shen, Changhui Zhao, Jing Lu, Mingruo Guo
Astaxanthin nanodispersion was prepared using whey protein isolate (WPI) and polymerized whey protein (PWP) through an emulsification-evaporation technique. The physicochemical properties of the astaxanthin nanodispersion were evaluated and the transport of astaxanthin was assessed using a Caco-2 cell monolayer model. The astaxanthin nanodispersions stabilized by WPI and PWP (2.5%, w/w) had a small particle size (121 ± 4.9 and 80.4 ± 5.9 nm), negative zeta potential (-19.3 ± 1.5 and -35.0 ± 2.2 mV), and high encapsulation efficiency (92...
January 18, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29345925/catalytic-mechanism-of-the-ubiquitin-like-nedd8-transfer-in-ring-e3-e2-nedd8-target-complex-from-qm-mm-free-energy-simulations
#18
Yufei Yue, Yue Ma, Ping Qian, Hong Guo
Ubiquitin-like (UBL) protein modifications play a key role in regulating protein function. In contrast to the ubiquitin (UB) and small ubiquitin-like modifier (SUMO) which are ligated to a massive segment of proteome, the UBL NEDD8 is highly selective for modifying a lysine residue on closely related cullin proteins (CULs). In this study, the X-ray structure of a trapped E3-E2~NEDD8-target intermediate (RBX1-UBC1~NEDD8-CUL1-DCN1) is used to build computer models, and combined quantum mechanics/molecular mechanics (QM/MM) molecular dynamics (MD) and free energy (potential of mean force) simulations are performed to investigate the catalytic mechanism of the NEDD8 transfer from E2 to the lysine residue (K720) on the substrate in the complex...
January 18, 2018: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/29345922/efficient-fusion-at-neutral-ph-by-human-immunodeficiency-virus-gp41-trimers-containing-the-fusion-peptide-and-transmembrane-domain
#19
Shuang Liang, Punsisi Ratnayake, Craig Keinath, Lihui Jia, Robert Wolfe, Ahinsa Ranaweera, David P Weliky
Human immunodeficiency virus (HIV) is membrane-enveloped and an initial infection step is joining/fusion of viral and cell membranes. This step is catalyzed by gp41 which is a single-pass integral viral membrane protein. The protein contains a ~170-residue ectodomain located outside the virus that is important for fusion, and includes the fusion peptide (FP), N-helix, loop, C-helix, and viral membrane-proximal external region (MPER). The virion initially has non-covalent complexes between three gp41 ectodomains and three gp120 proteins...
January 18, 2018: Biochemistry
https://www.readbyqxmd.com/read/29345906/prediction-of-hot-spots-at-myeloid-cell-leukemia-1-inhibitors-interface-using-energy-estimation-and-alanine-scanning-mutagenesis
#20
Parthiban Marimuthu, Kalaimathy Singaravelu
Myeloid cell leukemia 1 (Mcl1) is an anti-apoptotic protein that plays central role in apoptosis regulation. Also, Mcl1 has the potency to resist apoptotic cues resulting in up-regulation and cancer cell protection. A molecular probe that has the potential to specifically target Mcl1, and thereby provoke its down-regulatory activity is very essential. The aim of the current study is to probe the internal conformational dynamics of protein motions and potential binding mechanism in response to a series of picomolar range Mcl1 inhibitors using explicit-solvent molecular dynamics (MD) simulations...
January 18, 2018: Biochemistry
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