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https://www.readbyqxmd.com/read/29161779/micronuclei-assay-in-exfoliated-buccal-cells-of-radiation-treated-oral-cancer-patients
#1
Gayathri Ramesh, Smriti Chaubey, Amrita Raj, Ravi Kumar Seth, Anuradha Katiyar, Amit Kumar
BACKGROUND: Micronuclei are suitable internal dosimeters for revealing tissue-specific genotoxic damage in individuals exposed to carcinogenic mixtures. Evaluation of radiation-induced cellular changes to predict radiosensitivity has invested many investigators since such changes were first found in biopsy material. AIM: The aim of the present study was to assess the relationship of with histopathological grade and number of radiation therapy sittings with the frequency of micronuclei and nuclear anomalies among oral cancer patients...
November 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/29161772/microarray-analysis-of-gene-expression-in-the-cyclooxygenase-cox-knockout-mice-a-connection-to-autism-spectrum-disorder
#2
Ravneet Rai-Bhogal, Eizaaz Ahmad, Hongyan Li, Dorota A Crawford
The cellular and molecular events that take place during brain development play an important role in governing function of the mature brain. Lipid signalling molecules such as prostaglandin E2 (PGE2 ) play an important role in healthy brain development. Abnormalities along the COX/PGE2 signalling pathway due to genetic or environmental causes have been linked to Autism Spectrum Disorders (ASDs). This study aims to evaluate the effect of altered COX/PGE2 signalling on development and function of the prenatal brain using male mice lacking cyclooxygenase-1 and -2 (COX-1(-/-) and COX-2(-/-) ) as potential model systems of ASD...
November 21, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29161719/palmitic-acid-curcumin-ester-facilitates-protection-of-neuroblastoma-against-oligomeric-a%C3%AE-40-insult
#3
Zhangyang Qi, Meihao Wu, Yun Fu, Tengfei Huang, Tingting Wang, Yanjie Sun, Zhibo Feng, Changzheng Li
BACKGROUND/AIMS: The generation of reactive oxygen species (ROS) caused by amyloid-β (Aβ) is considered to be one of mechanisms underlying the development of Alzheimer's disease. Curcumin can attenuate Aβ-induced neurotoxicity through ROS scavenging, but the protective effect of intracellular curcumin on neurocyte membranes against extracellular Aβ may be compromised. To address this issue, we synthesized a palmitic acid curcumin ester (P-curcumin) which can be cultivated on the cell membrane and investigated the neuroprotective effect of P-curcumin and its interaction with Aβ...
November 20, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29161709/impact-of-local-and-systemic-factors-on-kidney-dysfunction-in-bardet-biedl-syndrome
#4
Miriam Zacchia, Giovanna Capolongo, Francesco Trepiccione, Vincent Marion
Bardet Biedl syndrome (BBS) is a rare inherited syndromic condition characterized by renal and extra-renal disorders. Renal defect, at either structural or functional level, is one of the cardinal clinical features, and is a major cause of morbidity. However, the pathogenic mechanism underlying its dysfunction remains largely unknown, and to date only symptomatic treatment with no specific therapy is available for these patients. Elucidating aberrant cellular and/or systemic processes that impact kidney function is therefore a prerequisite to develop targeted innovative therapeutic strategies for the BBS patients...
November 21, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29161706/endotoxin-effects-on-cardiac-and-renal-functions-and-cardiorenal-syndromes
#5
Grazia Maria Virzì, Anna Clementi, Alessandra Brocca, Claudio Ronco
Gram-negative sepsis is a major cause of morbidity and mortality in critical ill patients. Recent findings in molecular biology and in signaling pathways have enhanced our understanding of its pathogenesis and opened up opportunities of innovative therapeutic approaches. Endotoxin plays a pivotal role in the pathogenesis of multi-organ dysfunction in the setting of gram-negative sepsis. Indeed, heart and kidney impairments seem to be induced by the release of circulating pro-inflammatory and pro-apoptotic mediators triggered by endotoxin interaction with immune cells...
November 22, 2017: Blood Purification
https://www.readbyqxmd.com/read/29161696/the-protein-expression-level-of-a-heterogeneous-gene-inserted-in-lipi-1-of-the-listeria-ivanovii-genome-relies-on-its-insertion-orientation
#6
Sijing Liu, Mingjuan Jiang, Lin Su, Tian Tang, Xiang Zhang, Yongyu Li, Qikang Pu, Chenyan Ren, Chuan Wang
Due to its capability to multiply in either phagocytic or nonphagocytic cells, and to subsequently elicit a robust cellular immune response, Listeria ivanovii (LI) is thought to be feasible for developing bacteria-based live attenuated vaccines. We previously generated several recombinant LI strains expressing Mycobacterium tuberculosis antigens. Since the expression level of heterogeneous protein was sometimes very low, we attempted to elucidate the principle of heterogeneous protein expression in such recombinant LI strains...
November 22, 2017: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29161661/chlorogenic-acid-prevents-diabetic-nephropathy-by-inhibiting-oxidative-stress-and-inflammation-through-modulation-of-the-nrf2-ho-1-and-nf-%C3%A4-b-pathways
#7
Liping Bao, Jushuang Li, Dongqing Zha, Lian Zhang, Ping Gao, Tao Yao, Xiaoyan Wu
Oxidative and inflammatory damage have been suggested to play important roles in the pathogenesis of diabetic nephropathy (DN). Chlorogenic acid (CGA) is one of the most abundant polyphenols and has known immunoprotective, antioxidant and anti-inflammatory properties. In the present study, animal experiments were designed to examine the protective effects of CGA in DN, and cellular experiments were designed to explore the underlying mechanisms. CGA significantly attenuated diabetic renal damage based on histological pathology and molecular biological methods...
November 18, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29161651/enhanced-anticancer-effect-of-fabricated-gallic-acid-cds-on-the-rgo-nanosheets-on-human-glomerular-mesangial-ip15-and-epithelial-proximal-hk2-kidney-cell-lines-cytotoxicity-investigations
#8
Wei Peng, Pengcheng Luo, Dingwen Gui, Weidong Jiang, Haixia Wu, Jie Zhang
In spite of the technological innovation in the biomedical science, cancer remains a critical disease. In this study, we designed a gallic acid/cadmium sulfide (GA/CdS) nanocomposite fabricated on the reduced graphene oxide (GA/CdS-rGO) nanosheets for the treatment system of human kidney cancer cells. The GA/CdS-rGO nanosheets have been prepared using gallic acid as a reducing agent. The characterization of nanocomposites was studied using UV-Vis spectroscope, FT-IR, XRD, SEM and TEM. The microscopic images showed the spherical shape and nano-scaled CdS nanoparticles on the sheet like rGO nanomaterials...
November 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29161623/functions-of-myosin-motors-tailored-for-parasitism
#9
REVIEW
Christina Mueller, Arnault Graindorge, Dominique Soldati-Favre
Myosin motors are one of the largest protein families in eukaryotes that exhibit divergent cellular functions. Their roles in protozoans, a diverse group of anciently diverged, single celled organisms with many prominent members known to be parasitic and to cause diseases in human and livestock, are largely unknown. In the recent years many different approaches, among them whole genome sequencing, phylogenetic analyses and functional studies have increased our understanding on the distribution, protein architecture and function of unconventional myosin motors in protozoan parasites...
November 18, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29161615/more-than-a-tad-spatiotemporal-control-of-caulobacter-pili
#10
REVIEW
Johann Mignolet, Gaël Panis, Patrick H Viollier
The Type IV pilus (T4P) is a powerful and sophisticated bacterial nanomachine involved in numerous cellular processes, including adhesion, DNA uptake and motility. Aside from the well-described subtype T4aP of the Gram-negative genera, including Myxococcus, Pseudomonas and Neisseria, the Tad (tight adherence) pilus secretion system re-shuffles homologous parts from other secretion systems along with uncharacterized components into a new type of protein translocation apparatus. A representative of the Tad apparatus, the Caulobacter crescentus pilus assembly (Cpa) machine is built exclusively at the newborn cell pole once per cell cycle...
November 18, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29161596/an-in-toto-approach-to-dissecting-cellular-interactions-in-complex-tissues
#11
Pavak Kirit Shah, Anthony Santella, Adrian Jacobo, Kimberly Siletti, A J Hudspeth, Zhirong Bao
Single-cell measurements have broadened our understanding of heterogeneity in biology, yet have been limited to mostly observational studies of normal or globally perturbed systems. Typically, perturbations are utilized in an open-ended approach wherein an endpoint is assayed during or after the biological event of interest. Here we describe ShootingStar, a platform for perturbation analysis in vivo, which combines live imaging, real-time image analysis, and automated optical perturbations. ShootingStar builds a quantitative record of the state of the sample being analyzed, which is used to automate the identification of target cells for perturbation, as well as to validate the impacts of the perturbation...
November 20, 2017: Developmental Cell
https://www.readbyqxmd.com/read/29161585/localized-lysosome-exocytosis-helps-breach-tissue-barriers
#12
Shaohe Wang, Kenneth M Yamada
Cell invasion across basement membrane barriers is important in both normal development and cancer metastasis. In this issue of Developmental Cell, Naegeli et al. (2017) identify a mechanism for breaching basement membranes. Localized lysosome exocytosis fuels generation of large, invasive cellular protrusions that expand tiny basement membrane openings.
November 20, 2017: Developmental Cell
https://www.readbyqxmd.com/read/29161581/dna-rna-hybrid-substrates-modulate-the-catalytic-activity-of-purified-aid
#13
Hala S Abdouni, Justin J King, Atefeh Ghorbani, Heather Fifield, Lesley Berghuis, Mani Larijani
Activation-induced cytidine deaminase (AID) converts cytidine to uridine at Immunoglobulin (Ig) loci, initiating somatic hypermutation and class switching of antibodies. In vitro, AID acts on single stranded DNA (ssDNA), but neither double-stranded DNA (dsDNA) oligonucleotides nor RNA, and it is believed that transcription is the in vivo generator of ssDNA targeted by AID. It is also known that the Ig loci, particularly the switch (S) regions targeted by AID are rich in transcription-generated DNA/RNA hybrids...
November 18, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29161559/bacterial-size-tuning-in-to-a-clearer-connection
#14
Matthew A Jorgenson
An innovative approach to harness cellular dimensions reveals fundamental links between cell size and other cellular processes in the bacterium Escherichia coli.
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29161514/discovery-of-an-orally-bioavailable-benzofuran-analogue-that-serves-as-a-%C3%AE-amyloid-aggregation-inhibitor-for-the-potential-treatment-of-alzheimer-s-disease
#15
Heejin Ha, Dong Wook Kang, Hyuk-Min Kim, Jin-Mi Kang, Jihyae Ann, Hyae Jung Hyun, Joon Hwan Lee, Sae Hee Kim, Hee Kim, Kwanghyun Choi, Hyun-Seok Hong, Young Ho Kim, Dong-Gyu Jo, Jiyoun Lee, Jeewoo Lee
We developed an orally active and blood-brain barrier-permeable benzofuran analogue (8, MDR-1339) with potent anti-aggregation activity. Compound 8 restored cellular viability from Aβ-induced cytotoxicity but also improved the learning and memory function of AD model mice by reducing the Aβ aggregates in the brains. Given the high bioavailability and brain permeability demonstrated in our pharmacokinetic studies, compound 8 will provide a novel scaffold for an Aβ-aggregation inhibitor that may offer an alternative treatment for AD...
November 21, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29161497/three-dimensional-microstructured-poly-vinyl-alcohol-hydrogel-platform-for-the-controlled-formation-of-multicellular-cell-spheroids
#16
Xiao-Qiu Dou, Ping Li, Holger Schönherr
Three-dimensional (3D) multicellular cell spheroids (MCSs) are excellent in vitro cell models, in which e.g. the in vivo cell-cell interaction processes are much better mimicked than in conventional two-dimensional (2D) cell layers. However, the difficulties in the generation of well-defined MCSs with controlled size severely limit their application. Herein, low-adhesive poly(vinyl alcohol) (PVA) hydrogels structured with inverted pyramid-shaped microwells were used to guide the aggregation of cells into MCSs...
November 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/29161457/the-soluble-guanylate-cyclase-cyg12-is-required-for-the-acclimation-to-hypoxia-and-trophic-regimes-in-chlamydomonas-reinhardtii
#17
Melis Düner, Jan Lambertz, Carolin Mügge, Anja Hemschemeier
Oxygenic phototrophs frequently encounter environmental conditions that result in intracellular energy crises. Growth of the unicellular green alga Chlamydomonas reinhardtii in hypoxia in the light depends on acclimatory responses of which the induction of photosynthetic cyclic electron flow is essential. The microalga cannot grow in the absence of molecular oxygen (O2 ) in the dark, although it possesses an elaborate fermentation metabolism. Not much is known about how the microalga senses and signals the lack of O2 or about its survival strategies during energy crises...
November 21, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29161447/dna-polymerase-beta-participates-in-dna-end-joining
#18
Sreerupa Ray, Gregory Breuer, Michelle DeVeaux, Daniel Zelterman, Ranjit Bindra, Joann B Sweasy
DNA double strand breaks (DSBs) are one of the most deleterious lesions and if left unrepaired, they lead to cell death, genomic instability and carcinogenesis. Cells combat DSBs by two pathways: homologous recombination (HR) and non-homologous end-joining (NHEJ), wherein the two DNA ends are re-joined. Recently a back-up NHEJ pathway has been reported and is referred to as alternative NHEJ (aNHEJ), which joins ends but results in deletions and insertions. NHEJ requires processing enzymes including nucleases and polymerases, although the roles of these enzymes are poorly understood...
November 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29161344/nuclear-localization-of-eif4g3-suggests-a-role-for-the-xy-body-in-translational-regulation-during-spermatogenesis-in-mice
#19
Jianjun Hu, Fengyun Sun, Mary Ann Handel
Eukaryotic translation initiation factor 4G (EIF4G) is an important scaffold protein in the translation initiation complex. In mice mutation of the Eif4g3 gene causes male infertility, with arrest of meiosis at the end of meiotic prophase. This study documents features of the developmental expression and sub-cellular localization of EIF4G3 that might contribute to its highly specific role in meiosis and spermatogenesis. Quite unexpectedly, EIF4G3 is located in the nucleus of spermatocytes, where it is highly enriched in the XY body, the chromatin domain formed by the transcriptionally inactive sex chromosomes...
November 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29161303/nonlinear-dynamics-of-early-atherosclerotic-plaque-formation-may-determine-the-efficacy-of-high-density-lipoproteins-hdl-in-plaque-regression
#20
Alexander D Chalmers, Christina A Bursill, Mary R Myerscough
We use a computational model to explore the effect of foam cell accumulation on plaque regression following an increase in high density lipoprotein (HDL) influx into the plaque. Atherosclerotic plaque formation is the outcome of cellular and cytokine responses to low density lipoproteins (LDL) that penetrate the artery wall following an injury to the endothelium and become modified. We modelled the cells and cytokines that are most important in plaque formation using partial differential equations. The model includes monocytes and macrophages, foam cells, macrophage chemoattractants, endothelium-stimulating cytokines, modified low density lipoproteins (mod LDL) and HDL...
2017: PloS One
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