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https://www.readbyqxmd.com/read/28315524/a-cellular-mechanism-for-inverse-effectiveness-in-multisensory-integration
#1
Torrey Ls Truszkowski, Oscar A Carrillo, Julia Bleier, Carolina Ramirez-Vizcarrondo, Molly McQuillan, Christopher P Truszkowski, Arseny S Khakhalin, Carlos D Aizenman
To build a coherent view of the external world, an organism needs to integrate multiple types of sensory information from different sources, a process known as multisensory integration (MSI). In a prior study (Felch et al. 2016) we showed that the temporal dependence of MSI in the optic tectum of Xenopus laevis tadpoles is mediated by the network dynamics of the recruitment of local inhibition by sensory input. This was one of the first cellular-level mechanisms described for MSI. Here we expand this cellular level view of MSI by focusing on the principle of inverse effectiveness, another central feature of MSI stating that the amount of multisensory enhancement observed inversely depends on the size of unisensory responses...
March 18, 2017: ELife
https://www.readbyqxmd.com/read/28314302/kras-mutant-status-may-be-associated-with-distant-recurrence-in-early-stage-rectal-cancer
#2
Michail Sideris, Jane Moorhead, Salvador Diaz-Cano, Amyn Haji, Savvas Papagrigoriadis
BACKGROUND/AIM: Total mesorectal excision combined with neo-adjuvant chemoradiotherary (CRT) and adjuvant chemotherapy, has been the standard treatment of locally advanced rectal cancer (LARC). Although TNM (Tumor, Node, Metastasis) classification for malignant Tumors is still the cornerstone in rectal cancer staging, there has been an effort to identify molecular biomarkers with additional prognostic or predictive value. MATERIALS AND METHODS: We retrospectively analyzed molecular biomarkers on prospectively collected histological specimens and clinical data from a cohort of 135 consecutive rectal cancer cases who underwent radical excision in a tertiary center between 2011-2014 (males=87, females=48, age range=22-89 years, mean=64,67 years, SD=13...
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28301180/borderline-personality-disorder-and-mental-health-care-utilization-the-role-of-self-harm
#3
Randy A Sansone, Martin Sellbom, Douglas A Songer
The current study examined the associations for borderline personality disorder (BPD) and a specific trait of the disorder, self-harm, with mental health care utilization. Our sample consisted of 145 psychiatric inpatients who completed 3 measures of BPD (Personality Diagnostic Questionnaire-4 [PDQ-4], McLean Screening Inventory for borderline personality disorder [MSI-BPD], Structured Clinical Interview for DSM-IV Axis II Disorders-Personality Questionnaire [SCID-II-PQ]) and the Self-Harm Inventory (SHI). In relationship to mental health care utilization, the correlation for the SHI was significantly larger than those for the PDQ-4, MSI-BPD, or SCID-II-PQ...
March 16, 2017: Personality Disorders
https://www.readbyqxmd.com/read/28300842/cd95-ligand-induces-senescence-in-mismatch-repair-deficient-human-colon-cancer-via-chronic-caspase-mediated-induction-of-dna-damage
#4
Danielle A Raats, Nicola Frenkel, Susanne J van Schelven, Inne HMBorel Rinkes, Jamila Laoukili, Onno Kranenburg
CD95 is best known for its ability to induce apoptosis via a well-characterized pathway involving caspase-mediated proteolytic events. However, in apoptosis-resistant cell lines of diverse cancer types stimulation of CD95 primarily has pro-tumorigenic effects that affect many of the hallmarks of cancer. For instance, in colon cancer cells with a mutant KRAS gene CD95 primarily promotes invasion and metastasis. In the current study, we further investigated the context dependency of the consequences of CD95 activation in colon cancer...
March 16, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28300637/integrated-mass-spectrometry-imaging-and-omics-workflows-on-the-same-tissue-section-using-grid-aided-parafilm-assisted-microdissection
#5
Jusal Quanico, Julien Franck, Maxence Wisztorski, Michel Salzet, Isabelle Fournier
BACKGROUND: In spite of the number of applications describing the use of MALDI MSI, one of its major drawbacks is the limited capability of identifying multiple compound classes directly on the same tissue section. METHODS: We demonstrate the use of grid-aided, parafilm-assisted microdissection to perform MALDI MS imaging and shotgun proteomics and metabolomics in a combined workflow and using only a single tissue section. The grid is generated by microspotting acid dye 25 using a piezoelectric microspotter, and this grid was used as a guide to locate regions of interest and as an aid during manual microdissection...
March 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28294229/molecular-imaging-of-small-molecule-drugs-in-animal-tissues-using-laser-desorption-postionization-mass-spectrometry
#6
Jiaxin Chen, Yongjun Hu, Qiao Lu, Pengchao Wang, Huaqi Zhan
Localization and quantification of the target drug in tissues is a key indicator of efficacy in drug discovery. In contrast to established methods that require matrices and complex sample pretreatment steps, matrix-free and low cost in situ analysis of small molecule drugs by mass spectrometry (MS) remains challenging. Here, we present a novel approach, laser desorption postionization (LDPI), which is coupled to a linear time-of-flight (TOF) MS and used to image the distribution of acriflavine (ACF) directly from a histological section of mouse kidney without any matrix or sample pretreatment...
March 15, 2017: Analyst
https://www.readbyqxmd.com/read/28293327/the-dynamic-dna-methylation-landscape-of-the-mutl-homolog-1-shore-is-altered-by-mlh1-93g-a-polymorphism-in-normal-tissues-and-colorectal-cancer
#7
Andrea J Savio, Miralem Mrkonjic, Mathieu Lemire, Steven Gallinger, Julia A Knight, Bharat Bapat
BACKGROUND: Colorectal cancers (CRCs) undergo distinct genetic and epigenetic alterations. Expression of mutL homolog 1 (MLH1), a mismatch repair gene that corrects DNA replication errors, is lost in up to 15% of sporadic tumours due to mutation or, more commonly, due to DNA methylation of its promoter CpG island. A single nucleotide polymorphism (SNP) in the CpG island of MLH1 (MLH1-93G>A or rs1800734) is associated with CpG island hypermethylation and decreased MLH1 expression in CRC tumours...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28293308/mismatch-repair-proteins-and-microsatellite-instability-in-colorectal-carcinoma-mlh1-msh2-msh6-and-pms2-histopathological-and-immunohistochemical-study
#8
Nour El Hoda S Ismael, Samar A El Sheikh, Suzan M Talaat, Eman M Salem
BACKGROUND: Colorectal cancer (CRC) is one of the most common cancers worldwide. Microsatellite instability (MSI) is detected in about 15% of all colorectal cancers. CRC with MSI has particular characteristics such as improved survival rates and better prognosis. They also have a distinct sensitivity to the action of chemotherapy. AIM: The aim of the study was to detect microsatellite instability in a cohort of colorectal cancer Egyptian patients using the immunohistochemical expression of mismatch repair proteins (MLH1, MSH2, MSH6 and PMS2)...
March 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28292895/diagnosis-of-prostate-cancer-by-desorption-electrospray-ionization-mass-spectrometric-imaging-of-small-metabolites-and-lipids
#9
Shibdas Banerjee, Richard N Zare, Robert J Tibshirani, Christian A Kunder, Rosalie Nolley, Richard Fan, James D Brooks, Geoffrey A Sonn
Accurate identification of prostate cancer in frozen sections at the time of surgery can be challenging, limiting the surgeon's ability to best determine resection margins during prostatectomy. We performed desorption electrospray ionization mass spectrometry imaging (DESI-MSI) on 54 banked human cancerous and normal prostate tissue specimens to investigate the spatial distribution of a wide variety of small metabolites, carbohydrates, and lipids. In contrast to several previous studies, our method included Krebs cycle intermediates (m/z <200), which we found to be highly informative in distinguishing cancer from benign tissue...
March 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28290926/soldier-readiness-processing-time-for-a-new-paradigm-in-managing-musculoskeletal-injuries-after-deployment
#10
Daniel I Rhon, Kerrie J Golden, Amy J Trevino, Brian S Hatler
BACKGROUND: The drowning impact that musculoskeletal injuries (MSI) have on Soldier readiness, deployability, and escalating health care costs is growing. These injuries are associated with approximately 25 million lost duty days each year. The need to curb costs and improve efficacy and efficiency of health care delivery is pressing. This requires the consideration of new paradigms for clinical pathways and health care delivery processes. Soldiers returning from a deployment go through a screening process to ensure any medical, dental, and administrative issues are adequately addressed...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28284774/analysis-of-microsatellite-instability-in-crispr-cas9-editing-mice
#11
Xueyun Huo, Yating Du, Jing Lu, Meng Guo, Zhenkun Li, Shuangyue Zhang, Xiaohong Li, Zhenwen Chen, Xiaoyan Du
Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR- associated (Cas) protein 9 system is a novel and powerful tool which is widely used for genome editing. CRISPR/Cas9 is RNA-guided and can lead to desired genomic modifications. However, whether the CRISPR/Cas9-mediated genome editing causes genomic alterations and genomic instability, such as microsatellite instability (MSI), is still unknown. Here we detected MSI in 21 CRISPR/Cas9 mouse strains using a panel of 42 microsatellite loci which were selected from our previous studies...
February 28, 2017: Mutation Research
https://www.readbyqxmd.com/read/28278514/distinct-clinical-outcomes-of-two-cimp-positive-colorectal-cancer-subtypes-based-on-a-revised-cimp-classification-system
#12
Jeong Mo Bae, Jung Ho Kim, Yoonjin Kwak, Dae-Won Lee, Yongjun Cha, Xianyu Wen, Tae Hun Lee, Nam-Yun Cho, Seung-Yong Jeong, Kyu Joo Park, Sae Won Han, Hye Seung Lee, Tae-You Kim, Gyeong Hoon Kang
BACKGROUND: Colorectal cancer (CRC) is a heterogeneous disease in terms of molecular carcinogenic pathways. Based on recent findings regarding the multiple serrated neoplasia pathway, we revised an eight-marker panel for a new CIMP classification system. METHODS: 1370 patients who received surgical resection for CRCs were classified into three CIMP subtypes (CIMP-N: 0-4 methylated markers, CIMP-P1: 5-6 methylated markers and CIMP-P2: 7-8 methylated markers). Our findings were validated in a separate set of high-risk stage II or stage III CRCs receiving adjuvant fluoropyrimidine plus oxaliplatin (n=950)...
March 9, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28275038/an-expanding-role-for-immunotherapy-in-colorectal-cancer
#13
REVIEW
Katherine M Bever, Dung T Le
Colorectal cancer (CRC) is a leading cause of cancer-related mortality in the United States. Response rates to second- and third-line therapy for metastatic CRC (mCRC) remain low, and immunotherapy is an attractive strategy for treatment in these patients given generally better tolerability than conventional chemotherapy and the potential for long-lasting durable responses. In particular, the novel checkpoint inhibitors (CPIs) have demonstrated unprecedented clinical activity in a wide range of cancers. The observation of clinical activity in microsatellite instability-high (MSI-H) mCRC was the first indication of a potential for CRC to respond to these agents, and has led to a breakthrough designation by the FDA for CPI use in this subset...
March 2017: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/28271569/n-glycan-matrix-assisted-laser-desorption-ionization-mass-spectrometry-imaging-protocol-for-formalin-fixed-paraffin-embedded-tissues
#14
Matthew T Briggs, Yin Ying Ho, Gurjeet Kaur, Martin K Oehler, Arun V Everest-Dass, Nicolle H Packer, Peter Hoffmann
RATIONALE: Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) of the proteome of a tissue has been an established technique for the past decade. In the last few years, MALDI-MSI of the N-glycome has emerged as a novel MALDI-MSI technique. To assess the accuracy and clinical significance of the N-linked glycan spatial distribution, we have developed a method that utilises MALDI-MSI followed by liquid chromatography coupled to tandem mass spectrometry (LC/MS/MS) in order to assign glycan structures to the differentiating MALDI-MSI glycan masses released from the tissue glycoproteins...
March 8, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28270991/joint-alignment-of-multispectral-images-via-semidefinite-programming
#15
Yuanjie Zheng, Yu Wang, Wanzhen Jiao, Sujuan Hou, Yanju Ren, Maoling Qin, Dewen Hou, Chao Luo, Hong Wang, James Gee, Bojun Zhao
In this paper, we introduce a novel feature-point-matching based framework for achieving an optimized joint-alignment of sequential images from multispectral imaging (MSI). It solves a low-rank and semidefinite matrix that stores all pairwise-image feature-mappings by minimizing the total amount of point-to-point matching cost via a convex optimization of a semidefinite programming formulation. This unique strategy takes a complete consideration of the information aggregated by all point-matching costs and enables the entire set of pairwise-image feature-mappings to be solved simultaneously and near-optimally...
February 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28264871/immune-microenvironment-in-microsatellite-instable-endometrial-cancers-hereditary-or-sporadic-origin-matters
#16
Janelle B Pakish, Qian Zhang, Zhongyuan Chen, Han Liang, Gary Chisholm, Ying Yuan, Samuel C Mok, Russell J Broaddus, Karen Lu, Melinda S Yates
PURPOSE: Recent studies show that colorectal tumors with high microsatellite instability (MSI-H) have increased immunogenicity and response to immunotherapy compared to microsatellite stable (MSS) tumors. It is not yet clear if MSI-H endometrial cancer (EC) may also benefit from these therapies. It is also unknown whether immune response is equivalent in MSI-H EC with sporadic or inherited Lynch syndrome origins. EXPERIMENTAL DESIGN: Multiplexed fluorescent immunohistochemistry (IHC) was used to compare matched MSI-H (n=60) and MSS (n=96) EC specimens by evaluating immune cell populations in tumor and stroma compartments...
March 6, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28261847/improved-field-mapping-and-artifact-correction-in-multispectral-imaging
#17
Brady Quist, Xinwei Shi, Hans Weber, Brian A Hargreaves
PURPOSE: To develop a method for improved B0 field-map estimation, deblurring, and image combination for multispectral imaging near metal. METHODS: A goodness-of-fit field-map estimation technique is proposed that uses only the multispectral imaging (MSI) data to estimate the field map. Using the improved field map, a novel deblurring technique is proposed that also employs a new image combination scheme to reduce the effects of noise and other residual MSI artifacts...
March 5, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28252942/ambient-characterization-of-synthetic-fibers-by-laser-ablation-electrospray-ionization-mass-spectrometry
#18
Fred A M G van Geenen, Maurice C R Franssen, Anton H M Schotman, Han Zuilhof, Michel W F Nielen
Direct analysis of synthetic fibers under ambient conditions is highly desired to identify the polymer, the finishes applied and irregularities that may compromise its performance and value. In this paper, laser ablation electrospray ionization ion mobility time-of-flight mass spectrometry (LAESI-IMS-TOF-MS) was used for the analysis of synthetic polymers and fibers. The key to this analysis was the absorption of laser light by aliphatic and aromatic nitrogen functionalities in the polymers. Analysis of polyamide (PA) 6, 46, 66, and 12 pellets and PA 6, 66, polyaramid and M5 fibers yielded characteristic fragment ions without any sample pretreatment, enabling their unambiguous identification...
March 14, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28250585/mitigation-by-sodium-nitroprusside-of-the-effects-of-salinity-on-the-morpho-physiological-and-biochemical-characteristics-of-rubus-idaeus-under-in-vitro-conditions
#19
Ali Ghadakchiasl, Ali-Akbar Mozafari, Nasser Ghaderi
This study examined the changes brought about by sodium nitroprusside (SNP) in the effects of salinity on the morpho-physiological and biochemical characteristics of Rubus idaeus var. Danehdrosht. Raspberry shoot-tip explants were cultured on Murashige and Skoog medium supplemented with a growth regulator that combined benzyleadenine (1 mg/l), indol-3-butyric acetic acid (0.2 mg/l), SNP (0, 50 and 100 µM) and sodium chloride (0, 50 and 100 mM). The results showed that salinity stress significantly decreased morpho-physiological and biochemical characteristics such as RWC, MSI and total protein content in regenerated explants and significantly increased the total soluble sugar, proline contents, peroxidase and superoxide dismutase activity in compared to the control...
January 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28248242/a-proof-of-concept-to-bridge-the-gap-between-mass-spectrometry-imaging-protein-identification-and-relative-quantitation-msi-lc-ms-ms-lf
#20
Laëtitia Théron, Delphine Centeno, Cécile Coudy-Gandilhon, Estelle Pujos-Guillot, Thierry Astruc, Didier Rémond, Jean-Claude Barthelemy, Frédéric Roche, Léonard Feasson, Michel Hébraud, Daniel Béchet, Christophe Chambon
Mass spectrometry imaging (MSI) is a powerful tool to visualize the spatial distribution of molecules on a tissue section. The main limitation of MALDI-MSI of proteins is the lack of direct identification. Therefore, this study focuses on a MSI~LC-MS/MS-LF workflow to link the results from MALDI-MSI with potential peak identification and label-free quantitation, using only one tissue section. At first, we studied the impact of matrix deposition and laser ablation on protein extraction from the tissue section...
October 26, 2016: Proteomes
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