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https://www.readbyqxmd.com/read/28820374/use-of-blood-donor-screening-to-monitor-prevalence-of-hiv-and-hepatitis-b-and-c-viruses-south-africa
#1
Marion Vermeulen, Ronel Swanevelder, Dhuly Chowdhury, Charlotte Ingram, Ravi Reddy, Evan M Bloch, Brian S Custer, Edward L Murphy
Among 397,640 first-time blood donors screened in South Africa during 2012-2015, HIV prevalence was 1.13%, hepatitis B virus prevalence 0.66%, and hepatitis C virus prevalence 0.03%. Findings of note were a high HIV prevalence in Mpumalanga Province and the near absence of hepatitis C virus nationwide.
September 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28820329/sources-to-variability-in-circulating-human-mirna-signatures
#2
Andreas Keller, Trine Rounge, Christina Backes, Nicole Ludwig, Randi Gislefoss, Petra Leidinger, Hilde Langseth, Eckart Meese
An increasing number of studies propose circulating microRNAs (miRNAs) as biomarkers for a large number of human diseases including cancer, cardiovascular diseases, neurological pathologies and others. To further validate miRNA as biomarkers it is indispensable to understand the variability of circulating miRNAs in healthy individuals. We determined the longitudinal miRNomes of 90 serum samples from the Janus Serum Bank in Norway, which have been stored between 23 and 40 years at -25 degrees Celsius. We profiled three serum samples with microarrays for 30 individuals, each...
August 18, 2017: RNA Biology
https://www.readbyqxmd.com/read/28819840/microfluidic-based-enrichment-and-retrieval-of-circulating-tumor-cells-for-rt-pcr-analysis
#3
Priya Gogoi, Saedeh Sepehri, Will Chow, Kalyan Handique, Yixin Wang
Molecular analysis of circulating tumor cells (CTCs) is hindered by low sensitivity and high level of background leukocytes of currently available CTC enrichment technologies. We have developed a novel device to enrich and retrieve CTCs from blood samples by using a microfluidic chip. The Celsee PREP100 device captures CTCs with high sensitivity and allows the captured CTCs to be retrieved for molecular analysis. It uses the microfluidic chip which has approximately 56,320 capture chambers. Based on differences in cell size and deformability, each chamber ensures that small blood escape while larger CTCs of varying sizes are trapped and isolated in the chambers...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819653/targeting-cytokines-in-gvhd-therapy
#4
Sandeep Kumar, Hemn Mohammadpour, Xuefang Cao
Transplantation of donor-derived allogeneic hematopoietic cells causes increased survival in patients suffering from various blood cancers and other hematologic and immunologic diseases. However, this health benefit is limited to certain patients. One major complication is graft-versus-host disease (GVHD) that occurs when donor-derived immune cells recognize host cells/tissues as foreign and perpetrate subsequent destruction. Cytokines are a major class of effector molecules that are involved in GVHD pathogenesis...
2017: Journal of Immunology Research and Therapy
https://www.readbyqxmd.com/read/28819637/cigarette-smoking-and-its-hazards-in-kidney-transplantation
#5
REVIEW
Muhammad Abdul Mabood Khalil, Jackson Tan, Said Khamis, Muhammad AshhadUllah Khalil, Rabeea Azmat, Arslan Rahat Ullah
Cigarette smoking affects many organs. It causes vasoconstriction through activation of sympathetic nervous system which leads to elevation of blood pressure and reduction in glomerular filtration rate and filtration pressure. It also causes thickening of renal arterioles. Cigarette smoking increases the risk of microalbuminuria and accelerates progression of microalbuminuria to macroalbuminuria. Furthermore, it causes rapid loss of glomerular filtration rate in chronic kidney disease patients. After kidney donation, these factors may be injurious to the solitary kidney...
2017: Advances in Medicine
https://www.readbyqxmd.com/read/28819520/the-ban-on-blood-donation-on-men-who-have-sex-with-men-time-to-rethink-and-reassess-an-outdated-policy
#6
Georgios Karamitros, Nikolaos Kitsos, Ioanna Karamitrou
During the 1980s the HIV/AIDS epidemic outbreak occurred. Due to the high prevalence of the disease on men who had sex with men (MSM) a lifetime ban on blood donations on men who had sex with men (MSM) was implemented. In the recent years, organizations like the European Union (EU) and the World Health Organization (WHO) have established new guidelines introducing the term of "risky sexual behavior" without any reference to the sex orientation of the potential donor, however many countries are hesitant to review the ban on men who had sex with men (MSM)...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28818801/development-and-validation-of-a-reliable-method-for-thiopurine-methyltransferase-tpmt-enzyme-activity-in-human-whole-blood-by-lc-ms-ms-an-application-for-phenotypic-and-genotypic-correlations
#7
Supaporn Wiwattanakul, Santirhat Prommas, Nuttawut Jenjirattithigarn, Siwalee Santon, Apichaya Puangpetch, Samart Pakakasama, Usanarat Anurathapan, Chonlaphat Sukasem
A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the determination of thiopurine methyltransferase (TPMT) activity in human whole blood lysate, based on conversion of 6-mercaptopurine (6-MP) by TPMT to 6-methylmercaptopurine (6-MMP) using S-adenosyl-l-methionine (SAM) as the methyl donor. This method was improved from the previous laborious method for washing of red cell lysate preparation to develop whole blood EDTA lysate. In addition, the TPMT incubation was optimized and the chromatography was performed in a short runtime of 7min on a C18-column by detection via triple quadrupole mass spectrometry...
August 4, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28818084/do-the-venous-blood-samples-replicate-malaria-parasite-densities-found-in-capillary-blood-a-field-study-performed-in-naturally-infected-asymptomatic-children-in-cameroon
#8
Maurice M Sandeu, Albert N Bayibéki, Majoline T Tchioffo, Luc Abate, Geoffrey Gimonneau, Parfait H Awono-Ambéné, Sandrine E Nsango, Diadier Diallo, Antoine Berry, Gaétan Texier, Isabelle Morlais
BACKGROUND: The measure of new drug- or vaccine-based approaches for malaria control is based on direct membrane feeding assays (DMFAs) where gametocyte-infected blood samples are offered to mosquitoes through an artificial feeder system. Gametocyte donors are identified by the microscopic detection and quantification of malaria blood stages on blood films prepared using either capillary or venous blood. However, parasites are known to sequester in the microvasculature and this phenomenon may alter accurate detection of parasites in blood films...
August 17, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28817238/stakeholders-in-psychiatry-and-their-attitudes-toward-receiving-pertinent-and-incident-findings-in-genomic-research
#9
Anna Sundby, Merete W Boolsen, Kristoffer S Burgdorf, Henrik Ullum, Thomas F Hansen, Anna Middleton, Ole Mors
Increasingly more psychiatric research studies use whole genome sequencing or whole exome sequencing. Consequently, researchers face difficult questions, such as which genomic findings to return to research participants and how. This study aims to gain more knowledge on the attitudes among potential research participants and health professionals toward receiving pertinent and incidental findings. A cross-sectional online survey was developed to investigate the attitudes among research participants toward receiving genomic findings...
August 17, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28817197/estimating-seroprevalence-of-herpes-simplex-virus-type-1-among-different-middle-east-and-north-african-male-populations-residing-in-qatar
#10
Gheyath K Nasrallah, Soha R Dargham, Layla I Mohammed, Laith J Abu-Raddad
BACKGROUND: HSV-1 epidemiology in the Middle East and North Africa (MENA) remains poorly understood. Our study aimed to measure HSV-1 antibody prevalence (seroprevalence) and its age-distribution among select MENA populations residing in Qatar. METHODS: Sera were collected from male blood donors attending Hamad Medical Corporation 2013-2015. A total of 2,077 sera were tested for anti-HSV-1 antibodies using HerpeSelect® 1 ELISA IgG kits (Focus Diagnostics, USA)...
August 17, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28816796/intrathecal-infusion-of-haploidentical-nondonor-lymphocytes-for-central-nervous-system-leukemic-relapse-after-haploidentical-hematopoietic-stem-cell-transplantation
#11
Azusa Mayumi, Akihisa Sawada, Aya Ioi, Kohei Higuchi, Mariko Shimizu, Maho Sato, Masahiro Yasui, Masami Inoue
Leukemic relapse in the central nervous system (CNS) after conventional treatment is associated with a poor prognosis. The effectiveness and safety of IV infusion of human leukocyte antigen (HLA)-mismatched lymphocytes for leukemia, and intrathecal (IT) infusion of HLA-mismatched lymphocytes for cerebrospinal fluid (CSF) dissemination of medulloblastoma have been reported. A 13-year-old girl (HLA-A31) was diagnosed as relapsing from Philadelphia chromosome-positive acute leukemia in the CNS after receiving chemotherapy, tyrosine kinase inhibitors, haploidentical hematopoietic stem cell transplantation (HSCT) from her father (HLA-A31), and craniospinal irradiation...
August 14, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28815947/olive-oil-phenolics-prevent-oxysterol-induced-pro-inflammatory-cytokine-secretion-and-ros-production-in-human-pbmcs-through-modulation-of-p38-and-jnk-pathways
#12
Gessica Serra, Monica Deiana, Jeremy P E Spencer, Giulia Corona
SCOPE: The aim of the present study was to investigate the ability of extra virgin olive oil (EVOO) polyphenols to counteract the pro-inflammatory effects induced by dietary and endogenous oxysterols in ex-vivo immune cells. METHODS AND RESULTS: Peripheral blood mononuclear cells (PBMCs), separated from the whole blood of healthy donors, were utilised and were stimulated with an oxysterols mixture, in the presence of physiologically relevant concentrations of the EVOO polyphenols, hydroxytyrosol (HT), tyrosol (TYR) and homovanillic alcohol (HVA)...
August 16, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28815621/red-blood-cell-sedimentation-of-apheresis-granulocytes
#13
Michelle A Lodermeier, Karen M Byrne, Willy A Flegel
Sedimentation of Apheresis Granulocyte components removes red blood cells. It is used to increase the blood donor pool when blood group-compatible donors cannot be recruited for a patient because of a major ABO incompatibility or incompatible red blood cell antibodies in the recipient. Because granulocytes have little ABO and few other red blood cell antigens on their membrane, such incompatibility lies mostly with the contaminating red blood cells. Video Clip S1 shows the process of red blood cell sedimentation of an Apheresis Granulocyte component...
August 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28815618/effect-on-gene-expression-of-three-allelic-variants-in-gata-motifs-of-abo-rhd-and-rhce-regulatory-elements
#14
Katie Fennell, Roser Hoffman, Ken Yoshida, Sadahiko Iwamoto, Lavendri Govender, Kuben Vather, Ashika Sookraj, Ute Jentsch, Chantale Pambrun, Catherine McAuley, Margaret A Keller, Gorka Ochoa-Garay
BACKGROUND: Only a few genetic variants have been reported in regulatory elements of blood group genes. Most of them affect GATA motifs, binding sites for the GATA-1 transcription factor. STUDY DESIGN AND METHODS: Samples from two patients and one donor with unusual or discrepant serology for ABO, RhD, and RhCE antigens were analyzed by DNA sequencing. Analyzed regions included the coding sequence and portions of regulatory elements. The effect of some variants on gene expression was evaluated in reporter gene assays...
August 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28815406/successful-management-of-a-hydropic-fetus-with-severe-anemia-and-thrombocytopenia-caused-by-anti-cd36-antibody
#15
Xiuzhang Xu, Lin Li, Wenjie Xia, Haoqiang Ding, Dawei Chen, Jing Liu, Jing Deng, Yangkai Chen, Zhiming He, Jiali Wang, Yuan Shao, Sentot Santoso, Xin Ye, Qun Fang
Cases of CD36 deficiency are not rare in Asian populations, foetal and neonatal alloimmune thrombocytopenia (FNAIT) caused by anti-CD36 isoantibodies appears more frequent than other HPA alloantibodies. However, little is known about the treatment of anti-CD36 mediated FNAIT in this region. A Chinese male foetus, whose mother had a history of multiple intrauterine foetal demise and/or hydrops, was diagnosed with severe FNAIT at 27 weeks of gestational age. Immunological analysis revealed total absence of CD36 on platelets and monocytes from mother, caused by a 329-330delAC mutation of the CD36 gene...
August 16, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28815003/glioblastoma-stem-like-cells-secrete-the-pro-angiogenic-vegf-a-factor-in-extracellular-vesicles
#16
Lucas Treps, Raul Perret, Sébastien Edmond, Damien Ricard, Julie Gavard
Glioblastoma multiforme (GBM) are mortifying brain tumours that contain a subpopulation of tumour cells with stem-like properties, termed glioblastoma stem-like cells (GSCs). GSCs largely contribute to tumour initiation, propagation and resistance to current anti-cancer therapies. GSCs are situated in perivascular niches, closely associated with brain microvascular endothelial cells, thereby involved in bidirectional molecular and cellular interactions. Moreover, extracellular vesicles are suspected to carry essential information that can adapt the microenvironment to the tumour's needs, including tumour-induced angiogenesis...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/28814284/effect-of-poly-hexamethylene-biguanide-hydrochloride-phmb-treated-non-sterile-medical-gloves-upon-the-transmission-of-streptococcus-pyogenes-carbapenem-resistant-e-coli-mrsa-and-klebsiella-pneumoniae-from-contact-surfaces
#17
S Ali, A P R Wilson
BACKGROUND: Reduction of accidental contamination of the near-patient environment has potential to reduce acquisition of healthcare-associated infection(s). Although medical gloves should be removed when soiled or touching the environment, compliance is variable. The use of antimicrobial-impregnated medical gloves could reduce the horizontal-transfer of bacterial contamination between surfaces. AIM: Determine the activity of antimicrobial-impregnated gloves against common hospital pathogens: Streptococcus pyogenes, carbapenem-resistant E...
August 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28811957/mapping-the-human-t-cell-repertoire-to-recurrent-driver-mutations-in-myd88-and-ezh2-in-lymphoma
#18
Julie S Nielsen, Andrew R Chang, Darin A Wick, Colin G Sedgwick, Zusheng Zong, Andrew J Mungall, Spencer D Martin, Natalie N Kinloch, Susann Ott-Langer, Zabrina L Brumme, Steven P Treon, Joseph M Connors, Randy D Gascoyne, John R Webb, Brian R Berry, Ryan D Morin, Nicol Macpherson, Brad H Nelson
Oncogenic "driver" mutations are theoretically attractive targets for the immunotherapy of lymphoid cancers, yet the proportion that can be recognized by T cells remains poorly defined. To address this issue without any confounding effects of the patient's immune system, we assessed T cells from 19 healthy donors for recognition of three common driver mutations in lymphoma: MYD88(L265P), EZH2(Y641F) , and EZH2(Y641N) . Donors collectively expressed the 10 most prevalent HLA class I alleles, including HLA-A*02:01...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28811655/a-tissue-engineered-blood-vessel-model-of-hutchinson-gilford-progeria-syndrome-using-human-ipsc-derived-smooth-muscle-cells
#19
Leigh Atchison, Haoyue Zhang, Kan Cao, George A Truskey
Hutchison-Gilford Progeria Syndrome (HGPS) is a rare, accelerated aging disorder caused by nuclear accumulation of progerin, an altered form of the Lamin A gene. The primary cause of death is cardiovascular disease at about 14 years. Loss and dysfunction of smooth muscle cells (SMCs) in the vasculature may cause defects associated with HGPS. Due to limitations of 2D cell culture and mouse models, there is a need to develop improved models to discover novel therapeutics. To address this need, we produced a functional three-dimensional model of HGPS that replicates an arteriole-scale tissue engineered blood vessel (TEBV) using induced pluripotent stem cell (iPSC)-derived SMCs from an HGPS patient...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811306/replication-and-validation-of-genetic-polymorphisms-associated-with-survival-after-allogeneic-blood-or-marrow-transplant
#20
Ezgi Karaesmen, Abbas A Rizvi, Leah Preus, Philip L McCarthy, Marcelo C Pasquini, Kenan Onel, Xiaochun Zhu, Stephen Spellman, Christopher A Haiman, Daniel O Stram, Loreall Pooler, Xin Sheng, Qianqian Zhu, Li Yan, Qian Liu, Qiang Hu, Amy Webb, Guy Brock, Alyssa I Clay-Gilmour, Sebastiano Battaglia, David Tritchler, Song Liu, Theresa Hahn, Lara E Sucheston-Campbell
Multiple candidate gene association studies of non-HLA single nucleotide polymorphisms (SNPs) and outcomes after blood or marrow transplant (BMT) have been conducted. We identified 70 publications reporting 45 SNPs in 36 genes significantly associated with disease-related mortality, progression-free survival, transplant-related mortality and/or overall survival after BMT. Replication and validation of these SNP associations were performed using DISCOVeRY-BMT, a well-powered genome-wide association study consisting of two cohorts, totaling 2,883 BMT recipients with AML, ALL or MDS and their HLA-matched unrelated donors, treated from 2000-2011 and reported to the CIBMTR...
August 15, 2017: Blood
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