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Prenatal genetic

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https://www.readbyqxmd.com/read/28537755/a-pilot-study-of-noninvasive-prenatal-diagnosis-of-alpha-and-beta-thalassemia-with-target-capture-sequencing-of-cell-free-fetal-dna-in-maternal-blood
#1
Wenjuan Wang, Yuan Yuan, Haiqing Zheng, Yaoshen Wang, Dan Zeng, Yihua Yang, Xin Yi, Yang Xia, Chunjiang Zhu
AIMS: Thalassemia is a dangerous hematolytic genetic disease. In south China, ∼24% Chinese carry alpha-thalassemia or beta-thalassemia gene mutations. Given the fact that the invasive sampling procedures can only be performed by professionals in experienced centers, it may increase the risk of miscarriage or infection. Thus, most people are worried about the invasive operation. As such, a noninvasive and accurate prenatal diagnosis is needed for appropriate genetic counseling for families with high risks...
May 24, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28533841/-collodion-baby-clinical-aspects-and-role-of-prenatal-diagnosis
#2
Ridha Fatnassi, Nédia Marouen, Houcem Ragmoun, Latifa Marzougui, Sabra Hammami
Collodion baby is a severe form of congenital ichthyosis detected in neonatal period. It often has a characteristic clinical picture. When evolution is not fatal; it often causes dry Ichthyosis. Thanks to molecular biology techniques, prenatal diagnosis can be made since the 10-12 weeks of amenorrhea, allowing genetic counselling. Prognosis depends on several parameters, namely the degree of the initial manifestation, the duration of desquamation, as well as underlying Ichthyosis This rewiew of the literature which aims to clarify the diagnostic aspects and therapeutic treatment as well as the role of the antenatal diagnosis is based on a new observation of a collodion baby born at 34 weeks, of a parturient woman having an index case and of infant deaths occurring in the first day of life...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28533154/preconception-and-prenatal-genetic-counselling
#3
REVIEW
Adonis S Ioannides
Identifying individuals at risk of having children affected by genetic conditions or congenital anomalies allows counselling that aims to inform reproductive decisions. This process takes place either at the preconception or early prenatal stage, although more options are available if risks are identified before the pregnancy. Preconception counselling covers issues that can affect the health of the mother and baby including folic acid supplementation. Carrier screening for autosomal recessive diseases, such as beta thalassaemia, has resulted in a significantly reduced incidence in many countries...
April 21, 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28523877/mother-nature-in-eczema-maternal-factors-influencing-atopic-dermatitis
#4
REVIEW
Alexandra R Vaughn, Paige Tannhauser, Raja K Sivamani, Vivian Y Shi
Atopic dermatitis (AD) is a highly prevalent chronic inflammatory skin disease. Current knowledge about the etiology of AD suggests that it is multifactorial and involves the interaction of several factors, including environmental triggers, genetics, immunologic factors, and skin barrier dysfunction. The prenatal environment has a significant influence on fetal development, including the maturation of skin barrier function. This review summarizes maternal factors that have been reported to influence the development of AD in offspring, including maternal genetics, nutrition, breastfeeding, environment, and behaviors...
May 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28523540/rubinstein-taybi-syndrome-and-epigenetic-alterations
#5
Edward Korzus
Rubinstein-Taybi syndrome (RSTS) is a rare genetic disorder in humans characterized by growth and psychomotor delay, abnormal gross anatomy, and mild to severe mental retardation (Rubinstein and Taybi, Am J Dis Child 105:588-608, 1963, Hennekam et al., Am J Med Genet Suppl 6:56-64, 1990). RSTS is caused by de novo mutations in epigenetics-associated genes, including the cAMP response element-binding protein (CREBBP), the gene-encoding protein referred to as CBP, and the EP300 gene, which encodes the p300 protein, a CBP homologue...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28523332/apert-syndrome-clinical-case
#6
Mirela Anişoara Siminel, Cristian Ovidiu NeamŢu, Damian DiŢescu, Mircea Cătălin ForŢofoiu, Alexandru Cristian Comănescu, Marius Bogdan Novac, Simona Daniela NeamŢu, Adrian Gluhovschi
Apert syndrome - acrocephalosyndactyly - is a rare autosomal dominant disorder representing 1:65 000 cases of living newborns. Characteristic malformations of the Apert syndrome are early craniostenosis, microviscerocranium and II-V finger syndactyly of hand and toes with proximal phalanx of the bilateral thumb "in delta". It is difficult to determine prenatal diagnosis in the second quarter, when examining the morphology of fetal signs; the dysmorphism signs appeared in the third pregnancy quarter. We present here the case of a newborn with Apert syndrome that was born prematurely in our Clinic after a monitored pregnancy, where there was issued a suspicion of cranio-facial dysmorphism, malposition and malformation of the feet and hands in the third quarter of prenatal pregnancy...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28518170/prenatal-exome-sequencing-in-anomalous-fetuses-new-opportunities-and-challenges
#7
Neeta L Vora, Bradford Powell, Alicia Brandt, Natasha Strande, Emily Hardisty, Kelly Gilmore, Ann Katherine M Foreman, Kirk Wilhelmsen, Chris Bizon, Jason Reilly, Phil Owen, Cynthia M Powell, Debra Skinner, Christine Rini, Anne D Lyerly, Kim A Boggess, Karen Weck, Jonathan S Berg, James P Evans
PurposeWe investigated the diagnostic and clinical performance of exome sequencing in fetuses with sonographic abnormalities with normal karyotype and microarray and, in some cases, normal gene-specific sequencing.MethodsExome sequencing was performed on DNA from 15 anomalous fetuses and from the peripheral blood of their parents. Parents provided consent to be informed of diagnostic results in the fetus, medically actionable findings in the parents, and their identification as carrier couples for significant autosomal recessive conditions...
May 18, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28518169/population-based-impact-of-noninvasive-prenatal-screening-on-screening-and-diagnostic-testing-for-fetal-aneuploidy
#8
Lisa Hui, Briohny Hutchinson, Alice Poulton, Jane Halliday
PurposeTo assess the population-wide impact of noninvasive prenatal screening (NIPS) on combined first-trimester screening (CFTS), early ultrasound (11-13 weeks), and invasive prenatal diagnosis in a state with over 73,000 births per year.MethodsAnalysis of population-based data from 2000 to 2015 including (i) invasive prenatal tests, (ii) CFTS uptake, and (iii) total births. Utilization of early ultrasound was analyzed before and after NIPS (2010-2015).ResultsInvasive testing decreased significantly by 39...
May 18, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28516087/dna-sequence-analysis-in-clinical-medicine-proceeding-cautiously
#9
REVIEW
Moyra Smith
Delineation of underlying genomic and genetic factors in a specific disease may be valuable in establishing a definitive diagnosis and may guide patient management and counseling. In addition, genetic information may be useful in identification of at risk family members. Gene mapping and initial genome sequencing data enabled the development of microarrays to analyze genomic variants. The goal of this review is to consider different generations of sequencing techniques and their application to exome sequencing and whole genome sequencing and their clinical applications...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28514642/congenital-adrenal-hyperplasia-due-to-11-hydroxylase-deficiency-compound-heterozygous-mutations-of-a-prevalent-and-two-novel-cyp11b1-mutations
#10
Chongjuan Gu, Tao Tan, Junbao Yang, Yilu Lu, Yongxin Ma
11β-hydroxylase deficiency (11β-OHD) occurs in about 5-8% of congenital adrenal hyperplasia (CAH). In this study, we identified three CYP11B1 (encoding Cytochrome P450 11B1) heterozygous mutations: c.1358G>C (p.R453Q), c.1229T>G (p.L410R) and c.1231G>T (p.G411C) in a Chinese CAH patient due to classic 11β-OHD. His parents were healthy and respectively carried the prevalent mutation c.1358G>C (p.R453Q), and the two novel mutations c.1229T>G (p.L410R) and c.1231G>T (p.G411C). In vitro expression studies, immunofluorescence demonstrated that wild type and mutant (L410R and G411C) proteins of CYP11B1 were correctly expressed on the mitochondria, and enzyme activity assay revealed the mutant reduced the 11-hydroxylase activity to 10% (P<0...
May 14, 2017: Gene
https://www.readbyqxmd.com/read/28512206/genetic-testing-and-reproductive-choice-in-neurological-disorders
#11
REVIEW
Omay Lee, Mary Porteous
Genetic testing is increasingly important for investigating suspected inherited neurological conditions. A genetic diagnosis can have a huge impact on patients and also their families. It is important for neurologists to appreciate the presymptomatic and prenatal testing options available to patients and their at-risk relatives once a genetic disorder is diagnosed. Asymptomatic family members can experience considerable psychological distress from the knowledge that they might have inherited a neurodegenerative condition...
May 16, 2017: Practical Neurology
https://www.readbyqxmd.com/read/28505061/novel-ofd1-frameshift-mutation-in-a-chinese-boy-with-joubert-syndrome-a-case-report-and-literature-review
#12
Kaihui Zhang, Chen Meng, Jing Ma, Min Gao, Yuqiang Lv, Yi Liu, Zhongtao Gai
Joubert syndrome (JBTS) is a clinically and genetically heterogeneous group of ciliopathy with a key diagnostic feature of 'molar tooth sign' in brain MRI. So far, over 20 causative genes have been identified, but only one gene (OFD1) results in X-linked Joubert syndrome 10 (JBTS10). Six mutations in the OFD1 gene have been found to cause JBTS10. In this study, we identified a novel OFD1 mutation of c.2843_2844 delAA (p.Lys948ArgfsX) in a 3-month-old boy with a 'molar tooth sign' and clinical features of JBTS using targeted exome next-generation sequencing...
May 12, 2017: Clinical Dysmorphology
https://www.readbyqxmd.com/read/28504423/genetic-vulnerabilities-to-prenatal-alcohol-exposure-limb-defects-in-sonic-hedgehog-and-gli2-heterozygous-mice
#13
Eric W Fish, Laura B Murdaugh, Kathleen K Sulik, Kevin P Williams, Scott E Parnell
BACKGROUND: Genetic factors influence the physical and neurobehavioral manifestations of prenatal alcohol exposure (PAE). Animal models allow the investigation of specific genes that confer vulnerability to, or protection from, birth defects associated with fetal alcohol spectrum disorders (FASDs). The objective of the present experiments was to determine if genetic alterations in the Sonic Hedgehog (Shh) signaling pathways affect the vulnerability to PAE-induced skeletal defects involving the forelimbs and/or hindlimbs...
May 15, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28503387/rubinstein-taybi-syndrome-associated-with-pituitary-macroadenoma-a-case-report
#14
Yasamin Olyaei, J Manuel Sarmiento, Serguei I Bannykh, Doniel Drazin, Robert T Naruse, Wesley King
Rubinstein-Taybi Syndrome (RSTS) is an autosomal dominant disorder that is classically characterized by prenatal and postnatal growth restriction, microcephaly, dysmorphic craniofacial features, broad thumbs and toes, and intellectual disability. We describe the first reported case of a pituitary macroadenoma associated with RSTS. A 39-year-old Caucasian female with a past medical history of RSTS diagnosed at age two was found to have a gadolinium-enhancing pituitary mass on magnetic resonance imaging (MRI) of the brain three years ago during workup for migraine-like headaches...
April 11, 2017: Curēus
https://www.readbyqxmd.com/read/28500872/cyp3a-genes-and-the-association-between-prenatal-methylmercury-exposure-and-neurodevelopment
#15
Sabrina Llop, Van Tran, Ferran Ballester, Fabio Barbone, Aikaterini Sofianou-Katsoulis, Jordi Sunyer, Karin Engström, Ayman Alhamdow, Tanzy M Love, Gene E Watson, Mariona Bustamante, Mario Murcia, Carmen Iñiguez, Conrad F Shamlaye, Valentina Rosolen, Marika Mariuz, Milena Horvat, Janja S Tratnik, Darja Mazej, Edwin van Wijngaarden, Philip W Davidson, Gary J Myers, Matthew D Rand, Karin Broberg
BACKGROUND: Results on the association between prenatal exposure to methylmercury (MeHg) and child neuropsychological development are heterogeneous. Underlying genetic differences across study populations could contribute to this varied response to MeHg. Studies in Drosophila have identified the cytochrome p450 3A (CYP3A) family as candidate MeHg susceptibility genes. OBJECTIVES: We evaluated whether genetic variation in CYP3A genes influences the association between prenatal exposure to MeHg and child neuropsychological development...
May 9, 2017: Environment International
https://www.readbyqxmd.com/read/28498832/prenatal-exposure-to-the-great-chinese-famine-and-mid-age-hypertension
#16
Lei Wu, Xueqin Feng, Axin He, Yi Ding, Xiuwen Zhou, Zhice Xu
BACKGROUND: One of the most terrible famines last century was Great Chinese Famine (GCF) in 1959~1961 when millions of people died from starving. Under-nutrition during famine between the Western and Eastern (Dutch Hungry vs. GCF) was similar, while cardiovascular consequences might not be the same. Addressing such questions may gain new insight into prevention of cardiovascular diseases. METHODS: A retrospective cohort of 18,593 participants aged 43-49 years of old, was from Suzhou, China...
2017: PloS One
https://www.readbyqxmd.com/read/28497491/male-child-with-somatic-mosaic-osteopathia-striata-with-cranial-sclerosis-caused-by-a-novel-pathogenic-amer1-frameshift-mutation
#17
Jennifer Hague, Isabelle Delon, Kim Brugger, Howard Martin, Leanne Sparnon, Ingrid Simonic, Stephen Abbs, Soo-Mi Park
Osteopathia striata with cranial sclerosis (OSCS; OMIM #300373) is a rare X-linked dominant condition caused by mutations in the AMER1 gene (also known as WTX or FAM123B). It is a condition which usually affects females in whom the clinical phenotype can be extremely variable. Conversely affected males typically die in utero or during the neonatal period [Perdu et al. (); Clinical Genetics 80: 383-388; Vasiljevic et al. (); Prenatal Diagnosis 35: 302-304]. There have been a small number of reported cases of surviving males, including three patients who are somatic mosaic for the condition [Chénier, Noor, Dupuis, Stavropoulos, & Mendoza-Londono, (); American Journal of Medical Genetics Part A 158A: 2946-2952; Holman et al...
May 12, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28488680/some-pioneers-of-european-human-genetics
#18
Peter S Harper
Some of the pioneers of human genetics across Europe are described, based on a series of 100 recorded interviews made by the author. These interviews, and the memories of earlier workers in the field recalled by interviewees, provide a vivid picture, albeit incomplete, of the early years of human and medical genetics. From small beginnings in the immediate post-World War 2 years, human genetics grew rapidly across many European countries, a powerful factor being the development of human cytogenetics, stimulated by concerns over the risks of radiation exposure...
May 10, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28487272/analysis-of-genetic-characteristics-and-reproductive-risks-of-balanced-complex-chromosome-rearrangement-carriers-in-china
#19
Liao Yaping, Wang Chunjing, Liang Meng, Hu Xiaomei, Wu Qi
To examine the type, characteristics and meiotic behavior of balanced complex chromosome rearrangements (CCRs) and their relationship with reproductive abnormalities in Chinese people, karyotype analyses were performed in 1063 couples with reproductive abnormalities using G-banding technology. Additional data were retrieved from a Chinese database and analyzed statistically with the karyotype and clinic data of CCRs. Two CCR carriers were found among the 1063 couples, and in all a total of 124 CCR carriers with the complete information were identified in the karyotype analysis and the database search...
May 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28485258/chromosomal-aberrations-in-monozygotic-and-dizygotic-twins-versus-singletons-in-denmark-during-1968-2009
#20
Lone Kroeldrup, Lisbeth A Larsen, Christina Fagerberg, Jens M Hertz, Kaare Christensen
BACKGROUND: Hall (Embryologic development and monozygotic twinning. Acta Geneticae Medicae et Gemellologiae, Vol. 45, 1996, pp. 53-57) hypothesized that chromosomal aberrations can lead to monozygotic (MZ) twinning. However, twinning and chromosomal aberrations increase prenatal mortality and could reduce the prevalence of chromosomal aberrations in live-born twins. We compared prevalence proportion ratios (PPR) of chromosomal aberrations and trisomy 21 (T21) in live-born twins versus singletons born in Denmark during 1968-2009...
May 9, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
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