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https://www.readbyqxmd.com/read/28643447/simultaneous-mapping-of-metabolites-and-individual-macromolecular-components-via-ultra-short-acquisition-delay-1-h-mrsi-in-the-brain-at-7t
#1
Michal Považan, Bernhard Strasser, Gilbert Hangel, Eva Heckova, Stephan Gruber, Siegfried Trattnig, Wolfgang Bogner
PURPOSE: Short-echo-time proton MR spectra at 7T feature nine to 10 distinct macromolecule (MM) resonances that overlap with the signals of metabolites. Typically, a metabolite-nulled in vivo MM spectrum is included in the quantification`s prior knowledge to provide unbiased metabolite quantification. However, this MM model may fail if MMs are pathologically altered. In addition, information about the individual MM peaks is lost. In this study, we aimed to create an improved MM model by parameterization of the in vivo MM spectrum into individual components, and to use this new model to quantify free induction decay MR spectroscopic imaging (FID-MRSI) data...
June 22, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28640207/reverse-gyrase-functions-in-genome-integrity-maintenance-by-protecting-dna-breaks-in-vivo
#2
Wenyuan Han, Xu Feng, Qunxin She
Reverse gyrase introduces positive supercoils to circular DNA and is implicated in genome stability maintenance in thermophiles. The extremely thermophilic crenarchaeon Sulfolobus encodes two reverse gyrase proteins, TopR1 (topoisomerase reverse gyrase 1) and TopR2, whose functions in thermophilic life remain to be demonstrated. Here, we investigated the roles of TopR1 in genome stability maintenance in S. islandicus in response to the treatment of methyl methanesulfonate (MMS), a DNA alkylation agent. Lethal MMS treatment induced two successive events: massive chromosomal DNA backbone breakage and subsequent DNA degradation...
June 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28637416/mixed-micelles-as-nano-polymer-therapeutics-of-docetaxel-increased-in-vitro-cytotoxicity-and-decreased-in-vivo-toxicity
#3
Arehalli S Manjappa, Popat S Kumbhar, Prajakta S Khopade, Ajit B Patil, John I Disouza
Docetaxel (DTX) has been used to treat several types of cancers, but it has provided pharmaceutical challenges due to its poor water solubility and toxicities associated with the co-solvents (tween-80 and ethanol). Nanopolymer therapeutics can be engineered to deliver anticancer agent specifically to cancer cells, thereby leaving normal healthy cells unaffected by toxic drugs such as DTX. The objective of the present study was to synthesize the polyacrylic acid (PAA)-DTX conjugate (PAADC) and preparation of nanopolymer therapeutics such as PAADC/DSPE-mPEG2000 mixed micelles (PAADC-DP MMs)...
June 21, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28632800/total-body-photography-in-skin-cancer-screening-the-clinical-utility-of-standardized-imaging
#4
Alexandra Rosenberg, Jon H Meyerle
Early detection of skin cancer is essential to reducing morbidity and mortality from both melanoma and nonmelanoma skin cancers. Total-body skin examinations (TBSEs) may improve early detection of malignant melanomas (MMs) but are controversial due to the poor quality of data available to establish a mortality benefit from skin cancer screening. Total-body photography (TBP) promises to provide a way forward by lowering the costs of dermatologic screening while simultaneously leveraging technology to increase patient access to dermatologic care...
May 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28630177/integrated-genome-and-transcriptome-sequencing-identifies-a-noncoding-mutation-in-the-genome-replication-factor-donson-as-the-cause-of-microcephaly-micromelia-syndrome
#5
Gilad D Evrony, Dwight R Cordero, Jun Shen, Jennifer N Partlow, Timothy W Yu, Rachel E Rodin, R Sean Hill, Michael E Coulter, Anh-Thu N Lam, Divya Jayaraman, Dianne Gerrelli, Diana G Diaz, Chloe Santos, Victoria Morrison, Antonella Galli, Ulrich Tschulena, Stefan Wiemann, M Jocelyne Martel, Betty Spooner, Steven C Ryu, Princess C Elhosary, Jillian M Richardson, Danielle Tierney, Christopher A Robinson, Rajni Chibbar, Dana Diudea, Rebecca Folkerth, Sheldon Wiebe, A James Barkovich, Ganeshwaran H Mochida, James Irvine, Edmond G Lemire, Patricia Blakley, Christopher A Walsh
While next-generation sequencing has accelerated the discovery of human disease genes, progress has been largely limited to the "low hanging fruit" of mutations with obvious exonic coding or canonical splice site impact. In contrast, the lack of high-throughput, unbiased approaches for functional assessment of most noncoding variants has bottlenecked gene discovery. We report the integration of transcriptome sequencing (RNA-seq), which surveys all mRNAs to reveal functional impacts of variants at the transcription level, into the gene discovery framework for a unique human disease, microcephaly-micromelia syndrome (MMS)...
June 19, 2017: Genome Research
https://www.readbyqxmd.com/read/28625092/factors-affecting-outcome-in-ocular-myasthenia-gravis
#6
Marco Mazzoli, Alessandra Ariatti, Franco Valzania, Shaniko Kaleci, Manuela Tondelli, Paolo F Nichelli, Giuliana Galassi
AIM OF THE STUDY: 50% to 60% of patients with ocular Myasthenia Gravis (OMG) progress to generalized disease (GMG) within 2 years.Aim of our study was to explore factors affecting prognosis of OMG and to test the predictive role of several independent clinical variables. MATERIALS AND METHODS: We reviewed a cohort of 168 Caucasian patients followed from September 2000 and January 2016. Several independent variables were considered as prognostic factors: gender, age of onset, results on electrophysiological tests, presence and level of antibodies against acetylcholine receptors (AChR-Abs), treatments, thymic abnormalities...
June 19, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28624173/high-resolution-manometry-compared-with-the-university-of-california-los-angeles-scleroderma-clinical-trials-consortium-git-2-0-in-systemic-sclerosis
#7
Hanan Sayed M Abozaid, Hala M K Imam, Marwa Mahmoud Abdelaziz, Dina H El-Hammady, Nihal A Fathi, Daniel E Furst
OBJECTIVES: To study esophageal high resolution manometry (HRM) in systemic sclerosis (SSc) patients and the correlation of findings to The University of California, Los Angeles Scleroderma Clinical Trials Consortium gastrointestinal tract 2.0 (UCLA SCTC_GIT 2.0). METHODS: Forty SSc patients were administered to the UCLA SCTC GIT 2.0. Patients underwent HRM study (Solar GI MMS). HRM data were compared with 15 healthy volunteers. RESULTS: Forty patients with mean age 46 ± 7 years and disease duration 9...
May 19, 2017: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/28620189/switching-and-extension-of-transmission-response-based-on-bending-metamaterials
#8
J S Hwang, Y J Kim, Y J Yoo, K W Kim, J Y Rhee, L Y Chen, Y P Lee
The electromagnetically-induced transparency (EIT)-like effects in planar and non-planar metamaterials (MMs) were investigated for microwave (GHz) frequencies. The specific MMs used in this study consisted of a cut-wire resonator and a ring resonator, where were placed on the top and the bottom layers, respectively. A transmission window was produced, due to the interference between bright- and bright-mode coupling. Using the numerical and the experimental results, we demonstrate that the bending of MM leads to enhanced transmission and bandwidth, as well as an additional EIT-like peak...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28619614/rapid-ex-vivo-examination-of-mohs-specimens-using-optical-coherence-tomography
#9
D Rashed, D Shah, A Freeman, R J Cook, C Hopper, C M Perrett
BACKGROUND: Mohs micrographic surgery (MMS) is an effective treatment for certain non-melanoma skin cancers. Optical coherence tomography (OCT) is a biomedical imaging modality that permits high-resolution imaging of the epidermis and dermis with the potential to detect both healthy tissue and tumour. OCT may also provide a means of detecting and differentiating between the various histological subtypes of basal cell carcinomas (BCC) in vivo. OBJECTIVE: The aim of this prospective ex vivo study was to evaluate the efficacy of OCT in recognising healthy and pathological margins of excised BCC lesions and detecting different BCC subtypes...
June 12, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28616936/encephaloduroateriosynangiosis-edas-in-the-management-of-moyamoya-syndrome-in-children-with-sickle-cell-disease
#10
Alexander Alamri, Pennylouise Hever, Jebet Cheserem, Catia Gradil, Sanj Bassi, Christos M Tolias
BACKGROUND: Encephalo-duro-arterio-synangiosis (EDAS) in Moyamoya syndrome (MMS) treatment has been well described in the literature, however in MMS caused by sickle cell anaemia (SCA), EDAS use remains controversial with poor long-term follow-up. We present a case-series of SCA patients who have undergone EDAS for SCA-related MMS and describe their post-operative course as well as provide a literature review of the role of EDAS in the treatment of sickle cell anaemia. METHODS: A retrospective review of all the paediatric EDAS procedures conducted in our institution for SCA from 2007 to 2015...
June 15, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28615372/preconception-micronutrient-supplementation-with-iron-and-folic-acid-compared-with-folic-acid-alone-affects-linear-growth-and-fine-motor-development-at-2-years-of-age-a-randomized-controlled-trial-in-vietnam
#11
Phuong H Nguyen, Ines Gonzalez-Casanova, Melissa F Young, Truong Viet Truong, Hue Hoang, Huong Nguyen, Son Nguyen, Ann M DiGirolamo, Reynaldo Martorell, Usha Ramakrishnan
Background: Maternal health and nutrition play a crucial role in early child growth and development. However, little is known about the benefits of preconception micronutrient interventions beyond the role of folic acid (FA) and neural tube defects.Objective: We evaluated the impact of weekly preconception multiple micronutrient (MM) or iron and folic acid (IFA) supplementation on child growth and development through the age of 2 y compared with FA alone.Methods: We followed 1599 offspring born to women who participated in a randomized controlled trial of preconception supplementation in Vietnam...
June 14, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28607608/clinical-features-pathological-findings-and-treatment-of-recurrent-dermatofibrosarcoma-protuberans
#12
Yanan Li, Chuan Wang, Bo Xiang, Siyuan Chen, Li Li, Yi Ji
Dermatofibrosarcoma protuberans (DESP) is a relatively rare and low-grade tumor of the skin and soft tissue. We review the clinical features, pathological findings and management of recurrent DESP with the aim to improve our understanding of this rare tumor. Fifty-seven patients were diagnosed with recurrent DFSP. The mean age at the presentation of DFSP was 30.9 years. The mean age at diagnosis of DFSP was 40.2 years. Chest wall was the dominant location. The histopathological diagnosis was ordinary DFSP (O-DFSP) in 46 cases and fibrosarcomatous DFSP (FS-DFSP) in 11 cases...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28606356/deletion-of-ligd-significantly-improves-gene-targeting-frequency-in-the-lignocellulolytic-filamentous-fungus-penicillium-oxalicum
#13
Xiulin Qin, Ruijie Li, Xiang Luo, Yanmei Lin, Jia-Xun Feng
To improve the gene targeting frequency (GTF) in the lignocellulolytic filamentous fungus Penicillium oxalicum HP7-1, the non-homologous end-joining (NHEJ) gene ligD was deleted. The obtained PoligD deletion mutant ΔPoligD showed no apparent defect in cellulase production, growth rate, and sensitivity towards osmotic stress and mutagen ethyl methanesulphonate (EMS), while increased sensitivity to high concentrations of methyl methanesulfonate (MMS). Deletion of PoligD gene resulted in significantly increased GTFs at three different loci in P...
June 2017: Fungal Biology
https://www.readbyqxmd.com/read/28605319/medicinal-mushrooms-in-human-clinical-studies-part-i-anticancer-oncoimmunological-and-immunomodulatory-activities-a-review
#14
Solomon P Wasser
More than 130 medicinal functions are thought to be produced by medicinal mushrooms (MMs) and fungi, including antitumor, immunomodulating, antioxidant, radical scavenging, cardiovascular, antihypercholesterolemic, antiviral, antibacterial, antiparasitic, antifungal, detoxification, hepatoprotective, antidiabetic, and other effects. Many, if not all, higher Basidiomycetes mushrooms contain biologically active compounds in fruit bodies, cultured mycelia, and cultured broth. Special attention has been paid to mushroom polysaccharides...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/28604419/prognostic-significance-of-cyclooxygenase-2-and-phosphorylated-akt1-overexpression-in-primary-nonmetastatic-and-metastatic-cutaneous-melanomas
#15
Ciro D Soares, Camilla F Borges, Marcondes Sena-Filho, Oslei P de Almeida, Rafael F Stelini, Maria L Cintra, Edgard Graner, Karina G Zecchin, Jacks Jorge
Cyclooxygenase 2 (COX-2) and phosphorylated Akt1 (p-Akt1) are associated with tumor spreading, cell proliferation, high metabolism, and angiogenesis in solid tumors. This study aimed to investigate COX-2 and p-Akt1 expression in primary and metastatic melanomas by correlating with the cellular proliferation index (as revealed by minichromosome maintenance 2 expression) and the outcome of patients with malignant melanomas. Seventy-seven biopsies of malignant melanomas, including 42 primary nonmetastatic melanomas (PNMMs), 12 primary metastatic melanomas (PMMs), and 23 metastatic melanomas (MMs), were retrospectively selected...
June 9, 2017: Melanoma Research
https://www.readbyqxmd.com/read/28599317/recq1-expression-is-upregulated-in-response-to-dna-damage-and-in-a-p53-dependent-manner
#16
Swetha Parvathaneni, Xing Lu, Ritu Chaudhary, Ashish Lal, Srinivasan Madhusudan, Sudha Sharma
Sensitivity of cancer cells to DNA damaging chemotherapeutics is determined by DNA repair processes. Consequently, cancer cells may upregulate the expression of certain DNA repair genes as a mechanism to promote chemoresistance. Here, we report that RECQ1, a breast cancer susceptibility gene that encodes the most abundant RecQ helicase in humans, is a p53-regulated gene, potentially acting as a defense against DNA damaging agents. We show that RECQ1 mRNA and protein levels are upregulated upon treatment of cancer cells with a variety of DNA damaging agents including the DNA-alkylating agent methylmethanesulfonate (MMS)...
May 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28597988/estimating-apparent-maximum-muscle-stress-of-trunk-extensor-muscles-in-older-adults-using-subject-specific-musculoskeletal-models
#17
Katelyn A Burkhart, Alexander G Bruno, Mary L Bouxsein, Jonathan F Bean, Dennis E Anderson
Maximum muscle stress (MMS) is a critical parameter in musculoskeletal modeling, defining the maximum force that a muscle of given size can produce. However, a wide range of MMS values have been reported in literature, and few studies have estimated MMS in trunk muscles. Due to widespread use of musculoskeletal models in studies of the spine and trunk, there is a need to determine reasonable magnitude and range of trunk MMS. We measured trunk extension strength in 49 participants over 65 years of age, surveyed participants about low back pain, and acquired quantitative computed tomography (QCT) scans of their lumbar spines...
June 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28596989/both-rad5-dependent-and-independent-pathways-are-involved-in-dna-damage-associated-sister-chromatid-exchange-in-budding-yeast
#18
Michael T Fasullo, Mingzeng Sun
Sister chromatids are preferred substrates for recombinational repair after cells are exposed to DNA damage. While some agents directly cause double-strand breaks (DSBs), others form DNA base adducts which stall or impede the DNA replication fork. We asked which types of DNA damage can stimulate SCE in budding yeast mutants defective in template switch mechanisms and whether PCNA polyubiquitination functions are required for DNA damage-associated SCE after exposure to potent recombinagens. We measured spontaneous and DNA damage-associated unequal sister chromatid exchange (uSCE) in yeast strains containing two fragments of his3 after exposure to MMS, 4-NQO, UV, X rays, and HO endonuclease-induced DSBs...
2017: AIMS Genetics
https://www.readbyqxmd.com/read/28595252/recurrent-tumors-referred-for-mohs-micrographic-surgery-a-12-year-experience-at-a-single-academic-center
#19
H William Higgins, Sara Capobianco, Kachiu C Lee
BACKGROUND: Mohs micrographic surgery (MMS) is used for treatment of primary and recurrent tumors. Compared with primary tumors, recurrent tumors are often more aggressive. OBJECTIVE: To understand differing characteristics between primary versus recurrent tumors treated by MMS. MATERIALS AND METHODS: The authors conducted a retrospective review of a 12-year period at 1 academic center. Recurrent tumors were defined as recurrent if previously treated with cryotherapy, topical chemotherapeutics, electrodesiccation and curettage, or excision...
June 6, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28595243/determinants-and-timeline-of-perioperative-anxiety-in-mohs-surgery
#20
Irèn Kossintseva, David Zloty
BACKGROUND: Patients undergoing Mohs micrographic surgery (MMS) exhibit anxiety relating to cancer cure or the expected cosmetic outcome. OBJECTIVE: To obtain quantitative measurements of perioperative cancer and cosmetic anxiety levels in first-time MMS patients. Parameters influencing anxiety and its natural course were assessed. METHODS: Prospective, single-blinded, questionnaire study of 173 patients undergoing MMS of the face. Anxiety levels were assessed using a visual analog scale preoperatively and postoperatively over 6 months...
June 6, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
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