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https://www.readbyqxmd.com/read/28337061/an-introduction-to-darc-technology
#1
REVIEW
Syed Shoeb Ahmad
Glaucoma is a multi-factorial neurodegenerative disorder. The common denominator in all types of glaucomas is retinal ganglion cell death through apoptosis. However, this cellular demise in glaucoma is detected late by structural or functional analyses. There can be a 10-year delay prior to the appearance of visual field defects and pre-perimetric glaucoma is an issue still being addressed. However, a new cutting-edge technology called detection of apoptosing retinal cells (DARC) is being developed. This technique is capable of non-invasive, real-time visualization of apoptotic changes at the cellular level...
January 2017: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28282382/population-genetic-analysis-of-the-darc-locus-duffy-reveals-adaptation-from-standing-variation-associated-with-malaria-resistance-in-humans
#2
Kimberly F McManus, Angela M Taravella, Brenna M Henn, Carlos D Bustamante, Martin Sikora, Omar E Cornejo
The human DARC (Duffy antigen receptor for chemokines) gene encodes a membrane-bound chemokine receptor crucial for the infection of red blood cells by Plasmodium vivax, a major causative agent of malaria. Of the three major allelic classes segregating in human populations, the FY*O allele has been shown to protect against P. vivax infection and is at near fixation in sub-Saharan Africa, while FY*B and FY*A are common in Europe and Asia, respectively. Due to the combination of strong geographic differentiation and association with malaria resistance, DARC is considered a canonical example of positive selection in humans...
March 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28217710/shedding-light-on-the-darc-knight-as-a-guardian-of-hematopoietic-stem-cell-quiescence
#3
COMMENT
Pniel Nham, Jae-Il Choi, Jin Hur, Sung Hee Baek, Hyo-Soo Kim
No abstract text is available yet for this article.
2017: Stem Cell Investigation
https://www.readbyqxmd.com/read/28214673/duffy-antigen-receptor-for-chemokines-darc-expressing-in-cancer-cells-inhibits-tumor-progression-by-suppressing-cxcr2-signaling-in-human-pancreatic-ductal-adenocarcinoma
#4
Shintaro Maeda, Satoshi Kuboki, Hiroyuki Nojima, Hiroaki Shimizu, Hideyuki Yoshitomi, Katsunori Furukawa, Masaru Miyazaki, Masayuki Ohtsuka
BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) has a dismal prognosis. Chemokines play important roles in the progression of many malignancies; however, the role of chemokine receptor expression in clinical cases of PDAC is unclear. Moreover, little is known about DARC, a decoy receptor of CXC chemokines, in the regulation of tumor progression. METHODS: Functions of chemokine receptors were evaluated using surgical specimens collected from PDAC patients, and PDAC cell lines...
February 16, 2017: Cytokine
https://www.readbyqxmd.com/read/28188225/inflammation-induced-caveolin-1-and-bmprii-depletion-promotes-endothelial-dysfunction-and-tgf%C3%AE-driven-pulmonary-vascular-remodeling
#5
Suellen Darc Santos Oliveira, Maricela Castellon, Jiwang Chen, Marcelo G Bonini, Xiaowu Gu, Michael H Elliott, Roberto F Machado, Richard D Minshall
Endothelial cell (EC) activation and vascular injury are hallmark features of Acute Lung Injury and Acute Respiratory Distress Syndrome (ALI/ARDS). Caveolin-1 (Cav-1) is highly expressed in pulmonary microvascular ECs and plays a key role in maintaining vascular homeostasis. The aim of this study was to determine whether the lung inflammatory response to Escherichia coli lipopolysaccharide (LPS) promotes priming of ECs via Cav-1 depletion and whether this contributes to the onset of pulmonary vascular remodeling...
February 10, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28046810/su-f-t-615-comparison-of-plan-quality-for-linac-based-stereotactic-radiosurgery-srs-using-single-and-multi-isocenter-techniques
#6
J Chang, A Wernicke, S Pannullo
PURPOSE: To compare the plan quality of linear accelerator (linac)-based stereotactic radiosurgery (SRS) using single-isocenter volumetric arc therapy (SI-VMAT), restricted single-isocenter dynamic-arc (RSI-DARC), and multi-isocenter DARC (MI-DARC) techniques. METHODS: Fifteen SRS cases were randomly selected and re-planned using the SI-VMAT (Pinnacle), RSI-DARC (iPlanNet) and MI-DARC (iPlanNet). The number of planning target volumes (PTVs) for each plan ranged from 1 to 6...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27968956/a-genetic-marker-of-the-ackr1-gene-is-present-in-patients-with-type-ii-congenital-smell-loss-who-have-type-i-hyposmia-and-hypogeusia
#7
William A Stateman, Alexandra B Knöppel, Willy A Flegel, Robert I Henkin
PURPOSE: Our previous study of Type II congenital smell loss patients revealed a statistically significant lower prevalence of an FY (ACKR1, formerly DARC) haplotype compared to controls. The present study correlates this genetic feature with subgroups of patients defined by specific smell and taste functions. METHODS: Smell and taste function measurements were performed by use of olfactometry and gustometry to define degree of abnormality of smell and taste function...
November 2016: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/27965453/staphylococcus-aureus-leukocidin-luked-and-hiv-1-gp120-target-different-sequence-determinants-on-ccr5
#8
Kayan Tam, Megan Schultz, Tamara Reyes-Robles, Bénédicte Vanwalscappel, Joshua Horton, Francis Alonzo, Beili Wu, Nathaniel R Landau, Victor J Torres
Leukocidin ED (LukED) is a bicomponent pore-forming toxin produced by Staphylococcus aureus that lyses host cells by targeting the chemokine receptors CC chemokine receptor type 5 (CCR5), CXCR1, CXCR2, and DARC. In addition to its role as a receptor for LukED, CCR5 is the major coreceptor for primary isolates of human immunodeficiency virus type 1 (HIV-1) and has been extensively studied. To compare how LukED and HIV-1 target CCR5, we analyzed their respective abilities to use CCR5/CCR2b chimeras to mediate cytotoxicity and virus entry...
December 13, 2016: MBio
https://www.readbyqxmd.com/read/27959918/the-presence-persistence-and-functional-properties-of-plasmodium-vivax-duffy-binding-protein-ii-antibodies-are-influenced-by-hla-class-ii-allelic-variants
#9
Flora S Kano, Flávia A Souza-Silva, Leticia M Torres, Barbara A S Lima, Taís N Sousa, Jéssica R S Alves, Roberto S Rocha, Cor J F Fontes, Bruno A M Sanchez, John H Adams, Cristiana F A Brito, Douglas E V Pires, David B Ascher, Ana Maria Sell, Luzia H Carvalho
BACKGROUND: The human malaria parasite Plasmodium vivax infects red blood cells through a key pathway that requires interaction between Duffy binding protein II (DBPII) and its receptor on reticulocytes, the Duffy antigen/receptor for chemokines (DARC). A high proportion of P. vivax-exposed individuals fail to develop antibodies that inhibit DBPII-DARC interaction, and genetic factors that modulate this humoral immune response are poorly characterized. Here, we investigate if DBPII responsiveness could be HLA class II-linked...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27897119/glaucoma-hot-topics-in-pharmacology
#10
Shiama I Balendra, Parth Arvind Shah, Mishank Jain, Andrzej Grzybowski, Maria F Cordeiro
BACKGROUND: Glaucoma comprises a group of neurodegenerative diseases resulting in retinal ganglion cell death within the optic nerve head. It is projected to affect almost 80 million people worldwide by 2020. The condition's asymptomatic nature translates to over half of glaucoma sufferers being unaware of their condition. By the time of diagnosis, irreversible blindness is likely to have occurred. Prime areas of glaucoma research therefore include identification and optimization of risk factors for the disease, accurate and early diagnostic tools and novel therapeutic methods...
2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27828622/sapoviruses-in-children-with-acute-gastroenteritis-from-manaus-amazon-region-brazil-2010-2011
#11
Tammy Kathlyn Amaral Reymão, Juliana das Merces Hernandez, Samya Thalita Picanço da Costa, Maísa Silva de Sousa, Darleise de Souza Oliveira, Luciana Damascena da Silva, Renato da Silva Bandeira, Ian Carlos Gomes de Lima, Luana da Silva Soares, Joana Darc Pereira Mascarenhas, Yvone Benchimol Gabbay
Sapoviruses (SaVs) are responsible for acute gastroenteritis in humans, especially children and the elderly. In Brazil, data on SaVs infections are very limited, especially in Northern Brazil. Here, we investigated the occurrence of SaVs in samples from hospitalized children under ten years old that presented acute gastroenteritis. Positive samples were genotyped and phylogenetic analysis was performed using prototype strains sequences obtained from GenBank database. In total, 156 fecal samples were screened by RT-PCR for SaVs...
November 3, 2016: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/27823888/novel-gold-i-complexes-with-5-phenyl-1-3-4-oxadiazole-2-thione-and-phosphine-as-potential-anticancer-and-antileishmanial-agents
#12
Joana Darc S Chaves, Luiza Guimarães Tunes, Chris Hebert de J Franco, Thiago Martins Francisco, Charlane Cimini Corrêa, Silvane M F Murta, Rubens Lima Monte-Neto, Heveline Silva, Ana Paula S Fontes, Mauro V de Almeida
The current anticancer and antileishmanial drug arsenal presents several limitations concerning their specificity, efficacy, costs and the emergence of drug-resistant cells lines, which encourages the urgent need to search for new alternatives. Inspired by the fact that gold(I)-based compounds are promising antitumoral and antileishmanial drug candidates, we synthesized novel gold(I) complexes containing phosphine and 5-phenyl-1,3,4-oxadiazole-2-thione and evaluated their anticancer and antileishmanial activities...
February 15, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27798646/independent-origin-and-global-distribution-of-distinct-plasmodium-vivax-duffy-binding-protein-gene-duplications
#13
Jessica B Hostetler, Eugenia Lo, Usheer Kanjee, Chanaki Amaratunga, Seila Suon, Sokunthea Sreng, Sivanna Mao, Delenasaw Yewhalaw, Anjali Mascarenhas, Dominic P Kwiatkowski, Marcelo U Ferreira, Pradipsinh K Rathod, Guiyun Yan, Rick M Fairhurst, Manoj T Duraisingh, Julian C Rayner
BACKGROUND: Plasmodium vivax causes the majority of malaria episodes outside Africa, but remains a relatively understudied pathogen. The pathology of P. vivax infection depends critically on the parasite's ability to recognize and invade human erythrocytes. This invasion process involves an interaction between P. vivax Duffy Binding Protein (PvDBP) in merozoites and the Duffy antigen receptor for chemokines (DARC) on the erythrocyte surface. Whole-genome sequencing of clinical isolates recently established that some P...
October 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27711207/genetic-modifiers-of-white-blood-cell-count-albuminuria-and-glomerular-filtration-rate-in-children-with-sickle-cell-anemia
#14
Beverly A Schaefer, Jonathan M Flanagan, Ofelia A Alvarez, Stephen C Nelson, Banu Aygun, Kerri A Nottage, Alex George, Carla W Roberts, Connie M Piccone, Thad A Howard, Barry R Davis, Russell E Ware
Discovery and validation of genetic variants that influence disease severity in children with sickle cell anemia (SCA) could lead to early identification of high-risk patients, better screening strategies, and intervention with targeted and preventive therapy. We hypothesized that newly identified genetic risk factors for the general African American population could also impact laboratory biomarkers known to contribute to the clinical disease expression of SCA, including variants influencing the white blood cell count and the development of albuminuria and abnormal glomerular filtration rate...
2016: PloS One
https://www.readbyqxmd.com/read/27668251/the-darc-cd82-axis-discloses-bone-marrow-macrophages-as-guardians-of-long-term-hematopoietic-stem-cells-quiescence
#15
COMMENT
Alejandro Pérez-Fernández, Ángel Hernández-Hernández
No abstract text is available yet for this article.
2016: Stem Cell Investigation
https://www.readbyqxmd.com/read/27668247/shedding-light-on-hsc-dormancy-a-role-for-the-darc
#16
COMMENT
Katherine C MacNamara
No abstract text is available yet for this article.
2016: Stem Cell Investigation
https://www.readbyqxmd.com/read/27578850/naturally-acquired-binding-inhibitory-antibodies-to-plasmodium-vivax-duffy-binding-protein-and-clinical-immunity-to-malaria-in-rural-amazonians
#17
Vanessa C Nicolete, Sarah Frischmann, Susana Barbosa, Christopher L King, Marcelo U Ferreira
BACKGROUND:  Antibodies to the cysteine-rich domain II of Plasmodium vivax Duffy binding protein (PvDBP) can inhibit binding of this parasite ligand to its receptor on red blood cells, the Duffy antigen/receptor for chemokines. These binding-inhibitory antibodies (BIAbs) also inhibit P. vivax invasion of reticulocytes in vitro. METHODS:  To investigate whether naturally acquired anti-PvDBP antibodies are associated with reduced risk of clinical malaria in a population exposed to low levels of P...
November 15, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27555313/a-novel-erythrocyte-binding-protein-of-plasmodium-vivax-suggests-an-alternate-invasion-pathway-into-duffy-positive-reticulocytes
#18
Francis B Ntumngia, Richard Thomson-Luque, Letícia de Menezes Torres, Karthigayan Gunalan, Luzia H Carvalho, John H Adams
UNLABELLED: Erythrocyte invasion by malaria parasites is essential for blood-stage development and an important determinant of host range. In Plasmodium vivax, the interaction between the Duffy binding protein (DBP) and its cognate receptor, the Duffy antigen receptor for chemokines (DARC), on human erythrocytes is central to blood-stage infection. Contrary to this established pathway of invasion, there is growing evidence of P. vivax infections occurring in Duffy blood group-negative individuals, suggesting that the parasite might have gained an alternative pathway to infect this group of individuals...
2016: MBio
https://www.readbyqxmd.com/read/27535749/the-retina-as-an-early-biomarker-of-neurodegeneration-in-a-rotenone-induced-model-of-parkinson-s-disease-evidence-for-a-neuroprotective-effect-of-rosiglitazone-in-the-eye-and-brain
#19
Eduardo Maria Normando, Benjamin Michael Davis, Lies De Groef, Shereen Nizari, Lisa A Turner, Nivedita Ravindran, Milena Pahlitzsch, Jonathan Brenton, Giulia Malaguarnera, Li Guo, Satyanarayana Somavarapu, Maria Francesca Cordeiro
Parkinson's Disease (PD) is the second most common neurodegenerative disease worldwide, affecting 1 % of the population over 65 years of age. Dopaminergic cell death in the substantia nigra and accumulation of Lewy bodies are the defining neuropathological hallmarks of the disease. Neuronal death and dysfunction have been reported in other central nervous system regions, including the retina. Symptoms of PD typically manifest only when more than 70 % of dopaminergic cells are lost, and the definitive diagnosis of PD can only be made histologically at post-mortem, with few biomarkers available...
August 18, 2016: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/27519558/correlation-between-magnetic-resonance-imaging-findings-after-posterior-sagittal-anorectoplasty-for-anorectal-malformations-and-the-clinical-outcome-preliminary-report
#20
Anna Morandi, Irene Borzani, Francesco Macchini, Giulia Brisighelli, Dario Consonni, Ernesto Leva
BACKGROUND/PURPOSE: To assess the anatomical results after posterior sagittal anorectoplasty (PSARP) by magnetic resonance imaging (MRI) and to evaluate the correlation of these findings with clinical outcomes. METHODS: Patients followed-up at our center after PSARP, being at least 6year old, with neither evidence of sacral abnormalities nor spinal dysraphisms were prospectively included. Complex ARMs were excluded. MRI was performed on a 1.5T unit. T1- and T2-weighted sequences were acquired, in orthogonal planes, according to the anal canal orientation...
November 2016: Journal of Pediatric Surgery
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