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Fetal neurology

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https://www.readbyqxmd.com/read/28079886/hiv-1-nef-is-released-in-extracellular-vesicles-derived-from-astrocytes-evidence-for-nef-mediated-neurotoxicity
#1
A Sami Saribas, Stephanie Cicalese, Taha Mohseni Ahooyi, Kamel Khalili, Shohreh Amini, Ilker Kudret Sariyer
Human immunodeficiency virus-associated neurological disorders (HANDs) affect the majority of AIDS patients and are a significant problem among HIV-1-infected individuals who live longer because of combined anti-retroviral therapies. HIV-1 utilizes a number of viral proteins and subsequent cytokine inductions to unleash its toxicity on neurons. Among HIV-1 viral proteins, Nef is a small protein expressed abundantly in astrocytes of HIV-1-infected brains and has been suggested to have a role in the pathogenesis of HAND...
January 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28074549/systemic-alterations-and-their-oral-manifestations-in-pregnant-women
#2
REVIEW
Camilla Silva de Araujo Figueiredo, Cíntia Gonçalves Carvalho Rosalem, Andre Luis Costa Cantanhede, Érika Bárbara Abreu Fonseca Thomaz, Maria Carmen Fontoura Nogueira da Cruz
The aims of this literature review are: to depict the main oral diseases that are related to pregnancy; to clarify some of the possible systemic mechanisms that are associated with these changes; and to address issues about oral care during pregnancy. A woman's organs undergo various physiological, neurological, and hormonal changes during pregnancy. Such changes occur gradually and are essential for the development of the fetus, providing what is needed for tissue formation and establishment of reserves for uterine and fetal life...
January 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28067865/weak-functional-connectivity-in-the-human-fetal-brain-prior-to-preterm-birth
#3
Moriah E Thomason, Dustin Scheinost, Janessa H Manning, Lauren E Grove, Jasmine Hect, Narcis Marshall, Edgar Hernandez-Andrade, Susan Berman, Athina Pappas, Lami Yeo, Sonia S Hassan, R Todd Constable, Laura R Ment, Roberto Romero
It has been suggested that neurological problems more frequent in those born preterm are expressed prior to birth, but owing to technical limitations, this has been difficult to test in humans. We applied novel fetal resting-state functional MRI to measure brain function in 32 human fetuses in utero and found that systems-level neural functional connectivity was diminished in fetuses that would subsequently be born preterm. Neural connectivity was reduced in a left-hemisphere pre-language region, and the degree to which connectivity of this left language region extended to right-hemisphere homologs was positively associated with the time elapsed between fMRI assessment and delivery...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28042822/enduring-sexually-dimorphic-impact-of-in-utero-exposure-to-elevated-levels-of-glucocorticoids-on-midbrain-dopaminergic-populations
#4
REVIEW
Glenda E Gillies, Kanwar Virdee, Ilse Pienaar, Felwah Al-Zaid, Jeffrey W Dalley
Glucocorticoid hormones (GCs) released from the fetal/maternal glands during late gestation are required for normal development of mammalian organs and tissues. Accordingly, synthetic glucocorticoids have proven to be invaluable in perinatal medicine where they are widely used to accelerate fetal lung maturation when there is risk of pre-term birth and to promote infant survival. However, clinical and pre-clinical studies have demonstrated that inappropriate exposure of the developing brain to elevated levels of GCs, either as a result of clinical over-use or after stress-induced activation of the fetal/maternal adrenal cortex, is linked with significant effects on brain structure, neurological function and behaviour in later life...
December 30, 2016: Brain Sciences
https://www.readbyqxmd.com/read/28032327/emerging-zika-virus-infection-a-rapidly-evolving-situation
#5
Bordi Licia, Avsic-Zupanc Tatjana, Lalle Eleonora, Vairo Francesco, Capobianchi Maria Rosaria, Pedro Fernando da Costa Vasconcelos
Zika virus is a mosquito-borne flavivirus, firstly identified in Uganda and responsible for sporadic human cases in Africa and Asia until recently, when large outbreak occurred in Pacific Ocean and the Americas. Since the main vectors during its spread outside of Africa have been Ae. albopictus and Ae. aegypti mosquitoes, which are widely distributed all over the world, there is urgent need for a coordinated response for prevention and spread of ZIKV epidemics.Despite clinical manifestation of Zika virus infection are usually mild and self limiting, there are reports suggesting, during the recent epidemic, an association of ZIKV infection with severe consequences, including fetal/newborn microcephaly, due to vertical in utero transmission, autoimmune-neurological presentations including cranial nerve dysfunction, and Guillain-Barré Syndrome in adults...
December 29, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28031434/testing-for-cmv-in-pregnancy
#6
Alda Saldan, Gabriella Forner, Carlo Mengoli, Nadia Gussetti, Giorgio Palù, Davide Abate
Congenital CMV-infection (cCMV) represents a relevant cause of deafness and neurological damage in newborns. Intrauterine CMV transmission might result after primary or non-primary infections, though at different rates (30% vs 0.2%, respectively). At present prenatal diagnosis of CMV infection is mainly based on maternal serology, detection of CMV-DNA in amniotic fluid and fetal blood, and US and MRI imaging. Recent evidences suggest that cCMV may be an immune-mediated disease and that evaluation of humoral and especially T-cell immunity may improve the overall prenatal diagnosis...
December 28, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28012448/expression-patterns-of-the-chromosome-21-microrna-cluster-mir-99a-mir-125b-and-let-7c-in-chorioamniotic-membranes
#7
Bhavi P Modi, Sonya Washington, Scott W Walsh, Colleen Jackson-Cook, Kellie J Archer, Jerome F Strauss
Trisomy 21 (T21) is the most common chromosome abnormality in humans and is associated with a spectrum of phenotypes, including cognitive impairment, congenital heart defects and immune system defects. In addition, T21 is also associated with abnormalities of fetal membranes including chorioamniotic separation, delayed fusion of the chorioamniotic membranes, defects in syncytiotrophoblast formation, as well as amniocyte senescence. There is evidence indicating miRNAs encoded by sequences on chromosome 21 (Chr-21) are involved in several of the cognitive and neurological phenotypes of T21, but the role of Chr-21 derived miRNAs in fetal membrane abnormalities associated with T21 has not been investigated...
January 2017: Placenta
https://www.readbyqxmd.com/read/27998308/semilobar-holoprosencephaly-in-a-12-month-old-baby-boy-born-to-a-primigravida-patient-with-type-1-diabetes-mellitus-a-case-report
#8
Pedro Pallangyo, Frederick Lyimo, Paulina Nicholaus, Hilda Makungu, Maria Mtolera, Isaac Mawenya
BACKGROUND: Holoprosencephaly is a rare spectrum of cephalic disorders resulting from a failure or incomplete division of the embryonic forebrain into distinct cerebral hemispheres. It is the most common brain malformation with an incidence of 1:250 during embryogenesis; however, owing to the associated high rates of spontaneous abortion the incidence is 1:16,000 among live deliveries. Pathogenesis of holoprosencephaly is complex and heterogeneous involving genetic abnormalities, teratogenic exposures, and syndromic associations...
December 20, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27997256/ultrasound-functional-evaluation-of-fetuses-with-myelomeningocele-study-of-the-interpretation-of-results
#9
A Maroto, T Illescas, M Meléndez, S Arévalo, C Rodó, J L Peiró, M Belfort, A Cuxart, E Carreras
OBJECTIVE: To assess the reliability of the interpretation of a new technique for the ultrasound evaluation of the level of neurological lesion in fetuses with myelomeningocele. METHODS: Observational study including myelomeningocele fetuses, referred to our center for the sonographic assessment of the fetal lower-limb movements, made and recorded by an expert in Maternal-fetal medicine and a specialist in Rehabilitation. Two observers, with different levels of expertise and blinded to each other's results, interpreted each recorded scan two different times...
December 20, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27997041/genetic-variation-at-16q24-2-is-associated-with-small-vessel-stroke
#10
Matthew Traylor, Rainer Malik, Mike A Nalls, Ioana Cotlarciuc, Farid Radmanesh, Gudmar Thorleifsson, Ken B Hanscombe, Carl Langefeld, Danish Saleheen, Natalia S Rost, Idil Yet, Tim D Spector, Jordana T Bell, Eilis Hannon, Jonathan Mill, Ganesh Chauhan, Stephanie Debette, Joshua C Bis, W T Longstreth, M Arfan Ikram, Lenore J Launer, Sudha Seshadri, Jordi Jimenez-Conde, John W Cole, Reinhold Schmidt, Agnieszka Słowik, Robin Lemmens, Arne Lindgren, Olle Melander, Raji P Grewal, Ralph L Sacco, Tatjana Rundek, Kathryn Rexrode, Donna K Arnett, Julie A Johnson, Oscar R Benavente, Sylvia Wasssertheil-Smoller, Jin-Moo Lee, Sara L Pulit, Quenna Wong, Stephen S Rich, Paul I W de Bakker, Patrick F McArdle, Daniel Woo, Christopher D Anderson, Huichun Xu, Laura Heitsch, Myriam Fornage, Christina Jern, Kari Stefansson, Unnur Thorsteinsdottir, Solveig Gretarsdottir, Cathryn M Lewis, Pankaj Sharma, Cathie L M Sudlow, Peter M Rothwell, Giorgio B Boncoraglio, Vincent Thijs, Chris Levi, James F Meschia, Jonathan Rosand, Steven J Kittner, Braxton D Mitchell, Martin Dichgans, Bradford B Worrall, Hugh S Markus
OBJECTIVE: Genome-wide association studies (GWAS) have been successful at identifying associations with stroke and stroke subtypes, but have not yet identified any associations solely with small vessel stroke (SVS). SVS comprises a quarter of all ischaemic stroke and is a major manifestation of cerebral small vessel disease, the primary cause of vascular cognitive impairment. Studies across neurological traits have shown younger onset cases have an increased genetic burden. We leveraged this increased genetic burden by performing an age-at-onset informed GWAS meta-analysis, including a large younger onset SVS population, to identify novel associations with stroke...
December 20, 2016: Annals of Neurology
https://www.readbyqxmd.com/read/27996031/mild-intrauterine-hypoperfusion-reproduces-neurodevelopmental-disorders-observed-in-prematurity
#11
Makiko Ohshima, Jacques-Olivier Coq, Kentaro Otani, Yorito Hattori, Yuko Ogawa, Yoshiaki Sato, Mariko Harada-Shiba, Masafumi Ihara, Masahiro Tsuji
Severe intrauterine ischemia is detrimental to the developing brain. The impact of mild intrauterine hypoperfusion on neurological development, however, is still unclear. We induced mild intrauterine hypoperfusion in rats on embryonic day 17 via arterial stenosis with metal microcoils wrapped around the uterine and ovarian arteries. All pups were born with significantly decreased birth weights. Decreased gray and white matter areas were observed without obvious tissue damage. Pups presented delayed newborn reflexes, muscle weakness, and altered spontaneous activity...
December 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27987329/fetal-alcohol-exposure-alters-blood-flow-and-neurological-responses-to-transient-cerebral-ischemia-in-adult-mice
#12
Shameena Bake, Rachel Gardner, Joseph D Tingling, Rajesh C Miranda, Farida Sohrabji
BACKGROUND: Prenatal alcohol exposure (PAE) can result in physical and neurocognitive deficits that are collectively termed "fetal alcohol spectrum disorders" (FASD). Although FASD is associated with lifelong intellectual disability, the mechanisms mediating the emergence of secondary mental health and physical disabilities are poorly understood. Based on our previous data showing that maternal ethanol (EtOH) exposure in mice resulted in an immediate reduction in cranially directed fetal blood flow, we hypothesized that such exposure would also result in persistent alterations in cranially directed blood flow in the prenatally alcohol-exposed (PAE) adult...
January 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/27981252/thyroid-hormone-dysfunction-during-pregnancy-a-review
#13
REVIEW
Aynadis Alemu, Betelihem Terefe, Molla Abebe, Belete Biadgo
Thyroid dysfunctions such as hypothyroidism, thyrotoxicosis and thyroid nodules may develop during pregnancy leading to abortion, placental abruptions, preeclampsia, preterm delivery and reduced intellectual function in the offspring. Epidemiological data have shown the significant role of maternal thyroid hormone in fetal neurologic development and maternal health. It has been suggested that the deleterious effects of thyroid dysfunction can also extend beyond pregnancy and delivery to affect neuro-intellectual development in the early life of the child...
November 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/27978593/fetal-neurosonogaphy-ultrasound-and-magnetic-resonance-imaging-in-competition
#14
S Tercanli, F Prüfer
Both in routine diagnostics and detailed, highly specialized workups, major advances have been observed in many areas of ultrasound due to an increase in expertise and improved technology in recent years. This is particularly true in the case of fetal neurosonography 1 2 3 4. Malformations of the CNS together with fetal heart defects are among the most common congenital anomalies. From the embryonic phase to the late third trimester, the CNS undergoes extensive development and maturation processes. The diagnosis of CNS anomalies is therefore primarily dependent on the time at which the examination is performed and the experience of the examiner...
December 2016: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/27974667/molecular-determinants-of-human-neutralizing-antibodies-isolated-from-a-patient-infected-with-zika-virus
#15
Qihui Wang, Huabing Yang, Xiaoqing Liu, Lianpan Dai, Tong Ma, Jianxun Qi, Gary Wong, Ruchao Peng, Sheng Liu, Junfu Li, Shihua Li, Jian Song, Jianying Liu, Jianhua He, Hui Yuan, Ying Xiong, Yong Liao, Jianhua Li, Jianping Yang, Zhou Tong, Bryan D Griffin, Yuhai Bi, Mifang Liang, Xiaoning Xu, Chuan Qin, Gong Cheng, Xinzheng Zhang, Peiyi Wang, Xiangguo Qiu, Gary Kobinger, Yi Shi, Jinghua Yan, George F Gao
The 2015-2016 outbreak of Zika virus (ZIKV) disease has affected many countries and is a major public health concern. ZIKV is associated with fetal microcephaly and neurological complications, and countermeasures are needed to treat and prevent ZIKV infection. We report the isolation of 13 specific human monoclonal antibodies from a single patient infected with ZIKV. Two of the isolated antibodies (Z23 and Z3L1) demonstrated potent ZIKV-specific neutralization in vitro without binding or neutralizing activity against strains 1 to 4 of dengue virus, the closest relative to ZIKV...
December 14, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27931048/neurodevelopment-and-health-related-quality-of-life-in-infants-born-with-gastroschisis-a-6-year-retrospective-french-study
#16
Barthelemy Tosello, Meriem Zahed, Floriane Guimond, Karine Baumstarck, Alice Faure, Fabrice Michel, Olivier Claris, Jerome Massardier, Catherine Gire, Thierry Merrot
Introduction Quantify quality of life (QoL) outcomes in gastroschisis children is little assessed. The primary objective was to describe the long-term outcome of newborns with gastroschisis treated in three tertiary care hospitals of France in terms of neurodevelopment and QoL. Materials and Methods The study reported was a cross-sectional, descriptive multicentric retrospective study assessing the outcome of newborns with gastroschisis, born between January 1, 2009, and December 31, 2014, treated at two large and French level III neonatal intensive care units...
December 8, 2016: European Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27923540/fetal-cytomegalovirus-infection
#17
REVIEW
Marianne Leruez-Ville, Yves Ville
Cytomegalovirus (CMV) congenital infection affects 0.7% of live births worldwide and is the leading cause of congenital neurological handicap of infectious origin. However, systematic screening for this infection has not been implemented in pregnancy or at birth in any country. This apparent paradox had been justified by persisting gaps in the knowledge of this congenital infection: uncertain epidemiological data, difficulty in the diagnosis of maternal infection, absence of validated prenatal prognostic markers, unavailability of an efficient vaccine and scarcity of data available on the treatment...
January 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27921429/-congenital-hyperinsulinism-loss-of-b-cell-self-control
#18
Jan Lebl, Klára Roženková, Štěpánka Průhová
Congenital hyperinsulinism is a serious blood glucose regulation defect that interferes with brain development, leading to mental retardation, neurological sequelae and secondary epilepsy and ultimately may be life-threatening. Congenital hyperinsulinism (CHI) is caused by genetic defects of regulation of insulin secretion that induce insulin oversecretion in intrauterine life and postnatally. The clinical consequence is fetal macrosomia and subsequently neonatal and infantile hypoglycaemia. The most severe form is caused by biallelic mutations of KCNJ11 and ABCC8 genes that encode both potassium channel subunits, whereas their heterozygous mutations as well as enzymatic defects (GLUD1, HADH, GCK) lead to milder presentation...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27916232/neuroinflammation-in-intrauterine-growth-restriction
#19
REVIEW
Julie A Wixey, Kirat K Chand, Paul B Colditz, S Tracey Bjorkman
Disruption to the maternal environment during pregnancy from events such as hypoxia, stress, toxins, inflammation, and reduced placental blood flow can affect fetal development. Intrauterine growth restriction (IUGR) is commonly caused by chronic placental insufficiency, interrupting supply of oxygen and nutrients to the fetus resulting in abnormal fetal growth. IUGR is a major cause of perinatal morbidity and mortality, occurring in approximately 5-10% of pregnancies. The fetal brain is particularly vulnerable in IUGR and there is an increased risk of long-term neurological disorders including cerebral palsy, epilepsy, learning difficulties, behavioural difficulties and psychiatric diagnoses...
November 25, 2016: Placenta
https://www.readbyqxmd.com/read/27913428/migration-pathways-of-thalamic-neurons-and-development-of-thalamocortical-connections-in-humans-revealed-by-diffusion-mr-tractography
#20
Molly Wilkinson, Tara Kane, Rongpin Wang, Emi Takahashi
The thalamus plays an important role in signal relays in the brain, with thalamocortical (TC) neuronal pathways linked to various sensory/cognitive functions. In this study, we aimed to see fetal and postnatal development of the thalamus including neuronal migration to the thalamus and the emergence/maturation of the TC pathways. Pathways from/to the thalami of human postmortem fetuses and in vivo subjects ranging from newborns to adults with no neurological histories were studied using high angular resolution diffusion MR imaging (HARDI) tractography...
December 2, 2016: Cerebral Cortex
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