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https://www.readbyqxmd.com/read/28821162/oral-administration-of-thymoquinone-mitigates-the-effect-of-cisplatin-on-brush-border-membrane-enzymes-energy-metabolism-and-antioxidant-system-in-rat-intestine
#1
Faaiza Shahid, Zeba Farooqui, Subuhi Abidi, Iqbal Parwez, Farah Khan
Cisplatin (CP) is a widely used chemotherapeutic agent that elicits severe gastrointestinal toxicity. Nigella sativa, a member of family Ranunculaceae, is one of the most revered medicinal plant known for its numerous health benefits. Thymoquinone (TQ), a major bioactive component derived from the volatile oil of Nigella sativa seeds, has been shown to improve gastrointestinal functions in animal models of acute gastric/intestinal injury. In view of this, the aim of the present study was to investigate the protective effect of TQ on CP induced toxicity in rat intestine and to elucidate the mechanism underlying these effects...
August 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28819292/vitrification-versus-slow-freezing-for-human-ovarian-tissue-cryopreservation-a-systematic-review-and-meta-anlaysis
#2
Qingquan Shi, Yidong Xie, Yan Wang, Shangwei Li
Vitrification is a well-accepted procedure for cryopreservation of gametes and embryos. Less is known, however, about its performance in preserving ovarian tissue, for which slow freezing is the current convention. Increasing interest is being focused on vitrification, but there are as yet no standard protocols for its use with ovarian tissue. In part, this is because of the variety of cell types and complex nature of ovarian tissue. We performed a meta-analysis of 14 studies that compared vitrification with slow freezing for cryopreservation of ovarian tissue...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815942/plasma-membrane-protein-profiling-in-beta-amyloid-treated-microglia-cell-line
#3
Virginia Correani, Laura Di Francesco, Giuseppina Mignogna, Cinzia Fabrizi, Stefano Leone, Alessandra Giorgi, Alessia Passeri, Roberto Casata, Lorenzo Fumagalli, Bruno Maras, M Eugenia Schininà
In the responsiveness of microglia to toxic stimuli, plasma membrane proteins play a key role. In this study we treated with a synthetic beta amyloid peptide murine microglial cells metabolically differently labelled with stable isotope amino acids (SILAC). The plasma membrane was selectively enriched by a multi-stage aqueous two-phase partition system. We were able to identify by 1D-LC-MS/MS analyses 1577 proteins, most of them are plasma membrane proteins according to the Gene Ontology annotation. An unchanged level of amyloid receptors in this data set, suggests that microglia preserve their responsiveness capability to the environment even after 24 h-challenge with amyloid peptides...
August 16, 2017: Proteomics
https://www.readbyqxmd.com/read/28813668/subnuclear-relocalization-of-structure-specific-endonucleases-in-response-to-dna-damage
#4
Irene Saugar, Alberto Jiménez-Martín, José Antonio Tercero
Structure-specific endonucleases contribute to the maintenance of genome integrity by cleaving DNA intermediates that need to be resolved for faithful DNA repair, replication, or recombination. Despite advances in the understanding of their function and regulation, it is less clear how these proteins respond to genotoxic stress. Here, we show that the structure-specific endonuclease Mus81-Mms4/EME1 relocalizes to subnuclear foci following DNA damage and colocalizes with the endonucleases Rad1-Rad10 (XPF-ERCC1) and Slx1-Slx4...
August 15, 2017: Cell Reports
https://www.readbyqxmd.com/read/28811666/the-essential-kinase-atr-ensuring-faithful-duplication-of-a-challenging-genome
#5
REVIEW
Joshua C Saldivar, David Cortez, Karlene A Cimprich
One way to preserve a rare book is to lock it away from all potential sources of damage. Of course, an inaccessible book is also of little use, and the paper and ink will continue to degrade with age in any case. Like a book, the information stored in our DNA needs to be read, but it is also subject to continuous assault and therefore needs to be protected. In this Review, we examine how the replication stress response that is controlled by the kinase ataxia telangiectasia and Rad3-related (ATR) senses and resolves threats to DNA integrity so that the DNA remains available to read in all of our cells...
August 16, 2017: Nature Reviews. Molecular Cell Biology
https://www.readbyqxmd.com/read/28807072/clavicle-fracture-with-osteomyelitis-after-neck-dissection-and-post-operative-radiotherapy-case-report
#6
R Shodo, Y Sato, H Ota, A Horii
BACKGROUND: Non-traumatic bone fractures in cancer patients are usually pathological fractures due to bone metastases. In head and neck cancer patients, clavicle stress fractures may occur as a result of atrophy of the trapezius muscle after neck dissection in which the accessory nerve becomes structurally or functionally damaged. CASE REPORT: A 71-year-old man underwent modified radical neck dissection with accessory nerve preservation and post-operative radiotherapy for submandibular lymph node metastases of tongue cancer...
August 15, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28806920/specific-ion-channels-contribute-to-key-elements-of-pathology-during-secondary-degeneration-following-neurotrauma
#7
Ryan L O'Hare Doig, Wissam Chiha, Marcus K Giacci, Nathanael J Yates, Carole A Bartlett, Nicole M Smith, Stuart I Hodgetts, Alan R Harvey, Melinda Fitzgerald
BACKGROUND: Following partial injury to the central nervous system, cells beyond the initial injury site undergo secondary degeneration, exacerbating loss of neurons, compact myelin and function. Changes in Ca(2+) flux are associated with metabolic and structural changes, but it is not yet clear how flux through specific ion channels contributes to the various pathologies. Here, partial optic nerve transection in adult female rats was used to model secondary degeneration. Treatment with combinations of three ion channel inhibitors was used as a tool to investigate which elements of oxidative and structural damage related to long term functional outcomes...
August 14, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28806375/physics-and-histologic-evaluation-of-rotary-ultrasonic-and-sonic-instruments
#8
Emanuele Ruga, Ettore Amerio, Vincenzo Carbone, Marco Volante, Sergio Gandolfo
Rotary instruments (RIs) are the most commonly used to perform osteotomies in many fields of medicine. Owing to a new interest in performing a minimally invasive surgery, over last fifteen years new devices have been used in oral surgery such as ultrasonic instruments (UIs) and, lately, sonic instruments (SIs). Nowadays, bone preservation and regeneration are paramount in many clinical situations and, consequently, it is crucial to rely upon instruments, which cause the least tissue damage during the surgery...
August 10, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28805825/the-processing-and-heterostructuring-of-silk-with%C3%A2-light
#9
Mehra S Sidhu, Bhupesh Kumar, Kamal P Singh
Spider silk is a tough, elastic and lightweight biomaterial, although there is a lack of tools available for non-invasive processing of silk structures. Here we show that nonlinear multiphoton interactions of silk with few-cycle femtosecond pulses allow the processing and heterostructuring of the material in ambient air. Two qualitatively different responses, bulging by multiphoton absorption and plasma-assisted ablation, are observed for low- and high-peak intensities, respectively. Plasma ablation allows us to make localized nanocuts, microrods, nanotips and periodic patterns with minimal damage while preserving molecular structure...
August 14, 2017: Nature Materials
https://www.readbyqxmd.com/read/28804553/sirt3-attenuates-doxorubicin-induced-cardiac-hypertrophy-and-mitochondrial-dysfunction-via-suppression-of-bnip3
#10
Qiong Du, Bin Zhu, Qing Zhai, Bo Yu
Doxorubicin (Dox) is an anthracycline antibiotic widely used in cancer treatment. Although its antitumor efficacy appears to be dose dependent, its clinical use is greatly restricted by development of cardiotoxicity. Sirtuin-3 (Sirt3) is the major deacetylase within the mitochondrial matrix that plays an important role in regulation of cardiac function. This study was performed to identify the regulatory role of Sirt3 on Dox-induced cardiac hypertrophy and mitochondrial dysfunction in rats in vivo and in vitro...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28804545/hydrogen-sulfide-prevents-diaphragm-weakness-in-cecal-ligation-puncture-induced-sepsis-by-preservation-of-mitochondrial-function
#11
Hai-Xia Zhang, Jun-Ming Du, Zhong-Nuo Ding, Xiao-Yan Zhu, Lai Jiang, Yu-Jian Liu
Mitochondrial dysfunction plays an important role in the pathogenesis of diaphragm weakness during sepsis. Recently, hydrogen sulfide (H2S), a gaseous transmitter endogenously generated by cystathionine-β-synthase (CBS), cystathionine-γ-lyase (CSE) and 3-mercaptopyruvate sulfurtransferase (3-MST), is found to improve mitochondrial function. The present study aimed to examine whether H2S synthases are expressed in the diaphragm, and investigated the effect of H2S donor in sepsis-induced diaphragm weakness and its relationship with mitochondrial function...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28803673/tubulointerstitial-damage-predicts-end-stage-renal-disease-in-lupus-nephritis-with-preserved-to-moderately-impaired-renal-function-a-retrospective-cohort-study
#12
Anna Broder, Wenzhu B Mowrey, Hina N Khan, Bojana Jovanovic, Alejandra Londono-Jimenez, Peter Izmirly, Chaim Putterman
OBJECTIVES: The presence of tubulointerstitial damage (TID) on renal biopsy is considered to be a late sequela of lupus nephritis (LN). The objective of this study was to determine if TID predicts progression to end stage renal disease (ESRD) in LN patients without advanced kidney disease. METHODS: All SLE patients with an index biopsy consistent with LN between January 2005 and July 2015, and eGFR ≥ 30mL/min/1.73m(2) were included. Moderate-to-severe TID was defined as the presence of moderate-to-severe tubular atrophy and/or interstitial fibrosis...
July 14, 2017: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/28801583/effect-of-x-ray-irradiation-on-hepatocarcinoma-cells-and-erythrocytes-in-salvaged-blood
#13
Feng-Jiang Zhang, Jin-Ting Yang, Li-Hui Tang, Wen-Na Wang, Kai Sun, Yue Ming, Kanhar Ghulam Muhammad, Yin-Fei Zheng, Min Yan
The broad clinical acceptance of intraoperative blood salvage and its applications in cancer surgery remain controversial. Until now, a method that can safely eliminate cancer cells while preserving erythrocytes does not exist. Here, we investigated whether X-ray generated from linear accelerator irradiation at a certain dose can kill hepatocarcinoma cells while preserving erythrocytes. HepG2, SK-Hep1 or Huh7 cells were mixed into the aliquots of erythrocytes obtained from healthy volunteers. After the mixed cells were exposed to 30 Gy and 50 Gy X-rays irradiation, the viability, clonogenicity, DNA synthesis and tumorigenicity of the tumor cells were determined by the MTT assay, plate colony formation, 5-ethynyl-2'-deoxyuridine incorporation, and subcutaneous xenograft implantation into immunocompromised mice...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28799106/chemical-sterilization-of-allograft-dermal-tissues
#14
Abigail Phipps, Edward Vaynshteyn, John B Kowalski, Manh-Dan Ngo, Karen Merritt, Joel Osborne, Evangelia Chnari
Common terminal sterilization methods are known to alter the natural structure and properties of soft tissues. One approach to providing safe grafts with preserved biological properties is the combination of a validated chemical sterilization process followed by an aseptic packaging process. This combination of processes is an accepted method for production of sterile healthcare products as described in ANSI/AAMI ST67:2011. This article describes the validation of the peracetic acid and ethanol-based (PAAE) chemical sterilization process for allograft dermal tissues at the Musculoskeletal Transplant Foundation (MTF, Edison, NJ)...
August 10, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/28798318/sunscreen-products-impair-the-early-developmental-stages-of-the-sea-urchin-paracentrotus-lividus
#15
Cinzia Corinaldesi, Elisabetta Damiani, Francesca Marcellini, Carla Falugi, Luca Tiano, Francesca Brugè, Roberto Danovaro
Marine ecosystems are increasingly threatened by the release of personal care products. Among them, sunscreens are causing concern either for the effects on skin protection from UV radiation and for the potential impacts on marine life. Here, we assessed the UVA protective efficacy of three sunscreens on human dermal fibroblasts, including two common products in Europe and USA, and an eco-friendly product. The sunscreens' effects were also tested on Paracentrotus lividus, a marine species possibly threatened by these contaminants...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28798258/preserved-right-ventricular-integrity-in-a-new-telemetric-rat-model-of-severe-pulmonary-hypertension
#16
Catharina Schreiber, Magdalena S Eilenberg, Attila Kiss, Helga Bergmeister, Bruno K Podesser, Julia Mascherbauer, Diana Bonderman
Telemetric monitoring of hemodynamic parameters has become an established standard in experimental models of pulmonary arterial hypertension (PAH). To that purpose, a dedicated catheter is usually implanted through the right ventricular wall of study animals. Drawbacks of this standard technique are: obtained pressures are from the right ventricle and therefore only surrogates for pulmonary arterial pressures, and furthermore, right ventricular myocardium is always damaged to a certain degree. To overcome shortcomings of standard hemodynamic assessment, we modified an established rat model, where severe PAH is induced by left-sided pneumonectomy plus monocrotaline injection...
August 10, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28797118/effect-of-trichoderma-enriched-organic-charcoal-in-the-integrated-wood-protection-strategy
#17
Javier Ribera, Mónica Gandía, Jose F Marcos, Maria Del Carmen Bas, Siegfried Fink, Francis W M R Schwarze
The gradual elimination of chromium from wood preservative formulations results in higher Cu leaching and increased susceptibility to wood decay fungi. Finding a sustainable strategy in wood protection has become of great interest among researchers. The objective of these in vitro studies was to demonstrate the effect of T-720-enriched organic charcoal (biochar) against five wood decay basidiomycetes isolated from strongly damaged poles. For this purpose, the antagonistic potential of Trichoderma harzianum (strain T-720) was confirmed among other four Trichoderma spp...
2017: PloS One
https://www.readbyqxmd.com/read/28796952/implanted-dental-pulp-cells-fail-to-induce-regeneration-in-partial-pulpotomies
#18
F Mangione, M EzEldeen, C Bardet, J Lesieur, M Bonneau, F Decup, B Salmon, R Jacobs, C Chaussain, S Opsahl-Vital
Cell-based partial pulp regeneration is one of the promising approaches to obtain newly formed functional dentin-pulp complex. It relies on the preservation of the healthy tissue while regenerating the damaged pulp. The aim of this study was to investigate whether this regenerative process could be achieved by implanting porcine dental pulp cells (pDPCs) in pulp defects in the minipig. By split-mouth model, self-assembling injectable nanopeptide hydrogel, with and without pDPCs, was implanted after cameral pulpotomy in premolars and molars...
August 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28795278/frozen-tissue-preparation-for-high-resolution-multiplex-histological-analyses-of-human-brain-specimens
#19
Fangjie Shao, Wenhong Jiang, Qingqing Gao, Baizhou Li, Chongran Sun, Qiyuan Wang, Qin Chen, Bing Sun, Hong Shen, Keqing Zhu, Jianmin Zhang, Chong Liu
The availability of a comprehensive tissue library is essential for elucidating the function and pathology of human brains. Considering the irreplaceable status of the formalin-fixation-paraffin-embedding (FFPE) preparation in routine pathology and the advantage of ultra-low temperature to preserve nucleic acids and proteins for multi-omics studies, these methods have become major modalities for the construction of brain tissue libraries. Nevertheless, the use of FFPE and snap-frozen samples is limited in high-resolution histological analyses because the preparation destroys tissue integrity and/or many important cellular markers...
August 9, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28783893/delayed-treatment-of-frostbite-with-hyperbaric-oxygen-a-report-of-two-cases
#20
Corine A Lansdorp, Gert R Roukema, Onno Boonstra, Jan Dokter
Frostbite is an injury caused by the freezing of tissue, causing varied levels of tissue damage and necrosis. Case reports have shown a positive effect of hyperbaric oxygen (HBO₂) in such injuries, in acute cases as well as delayed (up to 21 days) presentation with complications. In this case report we present the course of hyperbaric treatment of two patients (a brother and sister, age 58 and 62) who sustained frostbite injuries to both feet 28 days earlier while hiking in the Himalayas. They were initially treated in Nepal following local protocol; afterward their primary care in the Netherlands was managed by the Burn Centre at Maasstad Hospital in Rotterdam...
July 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
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