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https://www.readbyqxmd.com/read/28721719/imprinted-nanovelcro-microchips-for-isolation-and-characterization-of-circulating-fetal-trophoblasts-toward-noninvasive-prenatal-diagnostics
#1
Shuang Hou, Jie-Fu Chen, Min Song, Yazhen Zhu, Yu Jen Jan, Szu Hao Chen, Tzu-Hua Weng, Dean-An Ling, Shang-Fu Chen, Tracy Ro, An-Jou Liang, Tom Lee, Helen Jin, Man Li, Lian Liu, Yu-Sheng Hsiao, Peilin Chen, Hsiao-Hua Yu, Ming-Song Tsai, Margareta D Pisarska, Angela Chen, Li-Ching Chen, Hsian-Rong Tseng
Circulating fetal nucleated cells (CFNCs) in maternal blood offer an ideal source of fetal genomic DNA for noninvasive prenatal diagnostics (NIPD). We developed a class of nanoVelcro microchips to effectively enrich a subcategory of CFNCs, i.e., circulating trophoblasts (cTBs) from maternal blood, which can then be isolated with single-cell resolution by a laser capture microdissection (LCM) technique for downstream genetic testing. We first established a nanoimprinting fabrication process to prepare the LCM-compatible nanoVelcro substrates...
July 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28592266/urgent-needs-in-fostering-neglected-tropical-diseases-ntds-laboratory-capacity-in-who-western-pacific-region-results-from-the-external-quality-assessment-on-ntds-diagnosis-in-2012-2015
#2
Yan Lu, Glenda Gonzales, Shao-Hong Chen, Hao Li, Yu-Chun Cai, Yan-Hong Chu, Lin Ai, Mu-Xin Chen, Hai-Ning Chen, Jia-Xu Chen
BACKGROUND: Neglected tropical diseases (NTDs) are a heterogeneous group of mainly chronic, debilitating and often stigmatizing diseases that largely affects low-income and politically marginalized populations, causing a large burden of public health, social and economies in the NTDs endemic countries. NTDs are caused by infections with a range of pathogen, including bacteria, parasites, protozoa and viruses. The accurate diagnosis of NTDs is important for reducing morbidity, preventing mortality and for monitoring of control programs...
June 8, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28504327/preferences-for-prenatal-diagnosis-of-sickle-cell-disorder-a%C3%A2-discrete-choice-experiment-comparing-potential-service-users%C3%A2-and-health-care-providers
#3
Melissa Hill, Eugene Oteng-Ntim, Frida Forya, Mary Petrou, Stephen Morris, Lyn S Chitty
BACKGROUND: Non-invasive prenatal diagnosis (NIPD) for sickle-cell disorder (SCD) is moving closer to implementation and studies considering stakeholder preferences are required to underpin strategies for offering NIPD in clinical practice. OBJECTIVE: Determine service user and provider preferences for key attributes of prenatal diagnostic tests for SCD and examine views on NIPD. METHOD: A questionnaire that includes a discrete choice experiment was used to determine the preferences of service users and providers for prenatal tests that varied across three attributes: accuracy, time of test and risk of miscarriage...
May 15, 2017: Health Expectations: An International Journal of Public Participation in Health Care and Health Policy
https://www.readbyqxmd.com/read/28497584/recommended-practice-for-laboratory-reporting-of-non-invasive-prenatal-testing-of-trisomies-13-18-and-21-a-consensus-opinion
#4
Zandra C Deans, Stephanie Allen, Lucy Jenkins, Farrah Khawaja, Ros J Hastings, Kathy Mann, Simon J Patton, Erik A Sistermans, Lyn S Chitty
OBJECTIVE: Non-invasive prenatal testing (NIPT) for trisomies 13, 18 and 21 is used worldwide. Laboratory reports should provide clear, concise results with test limitations indicated, yet no national or local guidelines are currently available. Here, we aim to present minimum best practice guidelines. METHODS: All laboratories registered in the three European quality assurance schemes for molecular and cytogenetics were invited to complete an online survey focused on services provided for NIPT and non-invasive prenatal diagnosis...
July 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28472981/infectious-diseases-of-poverty-the-first-five-years
#5
EDITORIAL
Wei Wang, Jin Chen, Hui-Feng Sheng, Na-Na Wang, Pin Yang, Xiao-Nong Zhou, Robert Bergquist
Although the focus in the area of health research may be shifting from infectious to non-communicable diseases, the infectious diseases of poverty remain a major burden of disease of global health concern. A global platform to communicate and share the research on these diseases is needed to facilitate the translation of knowledge into effective approaches and tools for their elimination. Based on the "One health, One world" mission, a new, open-access journal, Infectious Diseases of Poverty (IDP), was launched by BioMed Central in partnership with the National Institute of Parasitic Diseases (NIPD), Chinese Center for Disease Control and Prevention (China CDC) on October 25, 2012...
May 4, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28472614/serotype-changes-and-antimicrobial-nonsusceptibility-rates-of-invasive-and-non-invasive-streptococcus-pneumoniae-isolates-after-implementation-of-10-valent-pneumococcal-nontypeable-haemophilus-influenzae-protein-d-conjugate-vaccine-phid-cv-in-bulgaria
#6
Lena Setchanova, Marianna Murdjeva, Iglika Stancheva, Alexandra Alexandrova, Maria Sredkova, Temenuga Stoeva, Magda Yoneva, Anna Kurchatova, Ivan Mitov
The 10-valent pneumococcal conjugate vaccine (PCV10) has been included in Bulgarian Childhood Immunization Program since 2010. This study aimed to assess serotype distribution and antimicrobial resistance of 198 invasive and non-invasive Streptococcus pneumoniae strains that had been isolated in Bulgaria during 2011-2016 from patients with invasive (IPD) and non-invasive (NIPD) pneumococcal diseases. The most common invasive serotypes were 3 (10.1%), 19F (4.0%), and 7F (3.0%). A significant decrease in the proportion of invasive vaccine types (VTs) from 64...
May 1, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28440505/detection-of-fetal-epigenetic-biomarkers-through-genome-wide-dna-methylation-study-for-non-invasive-prenatal-diagnosis
#7
Hong-Dan Wang, Lin Liu, Hui-Ru Zhao, Qiao-Fang Hou, Jing-Bin Yan, Wei-Li Shi, Qian-Nan Guo, Li Wang, Shi-Xiu Liao, Bo-Feng Zhu
The discovery of cell-free DNA fetal (cff DNA) in maternal plasma during pregnancy provides a novel perspective for the development of non‑invasive prenatal diagnosis (NIPD). Against the background of maternal DNA, the use of the relatively low concentration of cff DNA is limited in NIPD. Therefore, in order to overcome the complication of the background of maternal DNA and expand the scope of cff DNA application in clinical practice, it is necessary to identify novel universal fetal‑specific DNA markers...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28342726/noninvasive-prenatal-testing-for-fetal-aneuploidy-and-single-gene-disorders
#8
REVIEW
Hannah Skrzypek, Lisa Hui
Our concept of nucleic acid biology has advanced dramatically over the past two decades, with a growing appreciation that cell-free DNA (cfDNA) fragments are present in all body fluids including plasma. In no other field has plasma DNA been as rapidly translated into clinical practice as in noninvasive prenatal testing (NIPT) for fetal chromosome abnormalities. NIPT is a screening test that requires confirmation with diagnostic testing, but other applications of cfDNA provide diagnostic information and do not require invasive testing...
July 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28272531/non-invasive-prenatal-diagnosis-of-beta-thalassemia-by-semiconductor-sequencing-a-feasibility-study-in-the-sardinian-population
#9
Luisella Saba, Maddalena Masala, Valentina Capponi, Giuseppe Marceddu, Matteo Massidda, Maria Cristina Rosatelli
β-Thalassemia is the most common autosomal recessive single-gene disorder in Sardinia, where approximately 10.3% of the population is a carrier. Prenatal diagnosis is carried out at 12 weeks of gestation via villocentesis and is commonly aimed at ascertaining the presence or absence of the HBB variant c.118C>T, which is the most common in Sardinia. In this study, we describe for the first time the application of semiconductor sequencing to the non-invasive prenatal diagnosis of β-thalassemia in 37 couples at risk for this variant...
May 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28216181/changing-trends-in-serotypes-of-s-pneumoniae-isolates-causing-invasive-and-non-invasive-diseases-in-unvaccinated-population-in-mexico-2000-2014
#10
María Noemí Carnalla-Barajas, Araceli Soto-Noguerón, Miguel Angel Sánchez-Alemán, Fortino Solórzano-Santos, María Elena Velazquez-Meza, Gabriela Echániz-Aviles
OBJECTIVE: Introduction of pneumococcal conjugate vaccines (PCV) targeted against a limited number of serotypes substantially decreased invasive (IPD) and non-invasive pneumococcal diseases (NIPD) but it was accompanied by non-vaccine type replacement disease. After 9 years of introduction of PCV in Mexico, we analyze the evidence of the indirect effects on IPD and NIPD serotype distribution among groups not targeted to receive the vaccine. METHODS: From January 2000 to December 2014, pneumococcal strains isolated from IPD and NIPD cases from patients ≥5 years of age from participant hospitals of the SIREVA II (Sistema Regional de Vacunas) network were serotyped...
May 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28120840/non-invasive-prenatal-diagnosis-of-spinal-muscular-atrophy-by-relative-haplotype-dosage
#11
Michael Parks, Samantha Court, Benjamin Bowns, Siobhan Cleary, Samuel Clokie, Julie Hewitt, Denise Williams, Trevor Cole, Fiona MacDonald, Mike Griffiths, Stephanie Allen
Although technically possible, few clinical laboratories across the world have implemented non-invasive prenatal diagnosis (NIPD) for selected single-gene disorders, mostly owing to the elevated costs incurred. Having previously proven that NIPD for X-linked disorders can be feasibly implemented in clinical practice, we have now developed a test for the NIPD of an autosomal-recessive disorder, spinal muscular atrophy (SMA). Cell-free DNA was extracted from maternal blood and prepared for massively parallel sequencing on an Illumina MiSeq by targeted capture enrichment of single-nucleotide polymorphisms across a 6 Mb genomic window on chromosome 5 containing the SMN1 gene...
April 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28040480/non-invasive-prenatal-diagnosis-nipd-of-cystic-fibrosis-an-optimized-protocol-using-memo-fluorescent-pcr-to-detect-the-p-phe508del-mutation
#12
C Guissart, C Dubucs, C Raynal, A Girardet, F Tran Mau Them, V Debant, C Rouzier, A Boureau-Wirth, E Haquet, J Puechberty, E Bieth, D Dupin Deguine, P Khau Van Kien, M P Brechard, V Pritchard, M Koenig, M Claustres, M C Vincent
BACKGROUND: Analysis of cell-free foetal DNA (cff-DNA) in maternal plasma is very promising for early diagnosis of monogenic diseases; in particular, cystic fibrosis (CF). However, NIPD of single-gene disorders has been limited by the availability of suitable technical platforms and the need to set up patient or disease-specific custom-made approaches. METHODS: To make research applications more readily accessible to the clinic, we offer a simple assay combining two independent methods to determine the presence or absence of paternally inherited foetal allele p...
March 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/27836589/a-novel-non-invasive-detection-method-for-the-fgfr3-gene-mutation-in-maternal-plasma-for-a-fetal-achondroplasia-diagnosis-based-on-signal-amplification-by-hemin-mofs-ptnps
#13
Jun Chen, Chao Yu, Yilin Zhao, Yazhen Niu, Lei Zhang, Yujie Yu, Jing Wu, Junlin He
The small amount of cell-free fetal DNA (cffDNA) can be a useful biomarker for early non-invasive prenatal diagnosis (NIPD) of achondroplasia. In this study, a novel non-invasive electrochemical DNA sensor for ultrasensitive detecting FGFR3 mutation gene, a pathogenic gene of achondroplasia, based on biocatalytic signal materials and the biotin-streptavidin system are presented. Notably encapsulation of hemin in metal-organic frameworks-based materials (hemin-MOFs) and platinum nanoparticles (PtNPs) were used to prepare hemin-MOFs/PtNPs composites via a one-beaker-one-step reduction...
May 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27753022/implementing-non-invasive-prenatal-diagnosis-nipd-in-a-national-health-service-laboratory-from-dominant-to-recessive-disorders
#14
Suzanne Drury, Sarah Mason, Fiona McKay, Kitty Lo, Christopher Boustred, Lucy Jenkins, Lyn S Chitty
Our UK National Health Service regional genetics laboratory offers NIPD for autosomal dominant and de novo conditions (achondroplasia, thanataphoric dysplasia, Apert syndrome), paternal mutation exclusion for cystic fibrosis and a range of bespoke tests. NIPD avoids the risks associated with invasive testing, making prenatal diagnosis more accessible to families at high genetic risk. However, the challenge remains in offering definitive diagnosis for autosomal recessive diseases, which is complicated by the predominance of the maternal mutant allele in the cell-free DNA sample and thus requires a variety of different approaches...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27645814/cell-free-fetal-dna-testing-for-prenatal-diagnosis
#15
REVIEW
S Drury, M Hill, L S Chitty
Prenatal diagnosis and screening have undergone rapid development in recent years, with advances in molecular technology driving the change. Noninvasive prenatal testing (NIPT) for Down syndrome as a highly sensitive screening test is now available worldwide through the commercial sector with many countries moving toward implementation into their publically funded maternity systems. Noninvasive prenatal diagnosis (NIPD) can now be performed for definitive diagnosis of some recessive and X-linked conditions, rather than just paternally inherited dominant and de novo conditions...
2016: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/27599172/effect-of-nocturnal-intermittent-peritoneal-dialysis-on-intraocular-pressure-and-anterior-segment-optical-coherence-tomography-parameters
#16
Ka Lung Chong, Amir Samsudin, Tee Chau Keng, Tengku Ain Kamalden, Norlina Ramli
PURPOSE: To evaluate the effect of nocturnal intermittent peritoneal dialysis (NIPD) on intraocular pressure (IOP) and anterior segment optical coherence tomography (ASOCT) parameters. Systemic changes associated with NIPD were also analyzed. METHODS: Observational study. Nonglaucomatous patients on NIPD underwent systemic and ocular assessment including mean arterial pressure (MAP), body weight, serum osmolarity, visual acuity, IOP measurement, and ASOCT within 2 hours both before and after NIPD...
February 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/27179509/surveillance-and-response-systems-for-elimination-of-tropical-diseases-summary-of-a-thematic-series-in-infectious-diseases-of-poverty
#17
REVIEW
Xia Zhou, Peiling Yap, Marcel Tanner, Robert Bergquist, Jürg Utzinger, Xiao-Nong Zhou
The peer-reviewed journal Infectious Diseases of Poverty provides a new platform to engage with, and disseminate in an open-access format, science outside traditional disciplinary boundaries. The current piece reviews a thematic series on surveillance-response systems for elimination of tropical diseases. Overall, 22 contributions covering a broad array of diseases are featured - i.e. clonorchiasis, dengue, hepatitis, human immunodeficiency virus/acquired immune deficiency syndrome (HIV/AIDS), H7N9 avian influenza, lymphatic filariasis, malaria, Middle East respiratory syndrome (MERS), rabies, schistosomiasis and tuberculosis (TB)...
May 14, 2016: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/27121686/electrochemical-de-alloying-in-two-dimensions-role-of-the-local-atomic-environment
#18
A Damian, F Maroun, P Allongue
We investigate by in situ scanning tunnelling microscopy (STM) the potential dependence of the electrochemical dealloying of NiPd monoatomic layers electrodeposited on Au(111). The dealloying process is achieved by Ni selective dissolution and was studied as a function of NiPd composition: for an alloy with a Ni content ≥70%, quasi-complete Ni dissolution is achieved at a potential of -0.9 VMSE whereas for a Ni content <70%, Ni dissolution at the same potential drastically slows down after the removal of small amounts of Ni...
August 7, 2016: Nanoscale
https://www.readbyqxmd.com/read/27107169/non-invasive-prenatal-diagnosis-nipd-for-single-gene-disorders-cost-analysis-of-nipd-and-invasive-testing-pathways
#19
Talitha I Verhoef, Melissa Hill, Suzanne Drury, Sarah Mason, Lucy Jenkins, Stephen Morris, Lyn S Chitty
OBJECTIVE: Evaluate the costs of offering non-invasive prenatal diagnosis (NIPD) for single gene disorders compared to traditional invasive testing to inform NIPD implementation into clinical practice. METHOD: Total costs of diagnosis using NIPD or invasive testing pathways were compared for a representative set of single gene disorders. RESULTS: For autosomal dominant conditions, where NIPD molecular techniques are straightforward, NIPD cost £314 less than invasive testing...
July 2016: Prenatal Diagnosis
https://www.readbyqxmd.com/read/27078875/fetal-genotyping-in-maternal-blood-by-digital-pcr-towards-nipd-of-monogenic-disorders-independently-of-parental-origin
#20
Sara Perlado, Ana Bustamante-Aragonés, Marta Donas, Isabel Lorda-Sánchez, Javier Plaza, Marta Rodríguez de Alba
PURPOSE: To date, non-invasive prenatal diagnosis (NIPD) of monogenic disorders has been limited to cases with a paternal origin. This work shows a validation study of the Droplet Digital PCR (ddPCR) technology for analysis of both paternally and maternally inherited fetal alleles. For the purpose, single nucleotide polymorphisms (SNPs) were studied with the only intention to mimic monogenic disorders. METHODS: NIPD SNP genotyping was performed by ddPCR in 55 maternal plasma samples...
2016: PloS One
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