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autism and epidemiology

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https://www.readbyqxmd.com/read/29137973/exposure-to-polybrominated-diphenyl-ethers-pbdes-and-child-behavior-current-findings-and-future-directions
#1
REVIEW
Ann M Vuong, Kimberly Yolton, Kim N Dietrich, Joseph M Braun, Bruce P Lanphear, Aimin Chen
Polybrominated diphenyl ethers (PBDEs) are recognized neurotoxicants, but the extent to which PBDEs influence various domains of behavior in children is not fully understood. As such, we reviewed epidemiologic studies published to date to provide an overview of the current state of knowledge on PBDEs' potential role in behavioral development. We identified 19 epidemiologic studies reporting on associations of prenatal and childhood concentrations of PBDEs with behaviors assessed in children from 1 to 12years, including executive function, attention, externalizing and internalizing behaviors, adaptive skills, and social behaviors/Autism Spectrum Disorder (ASD)...
November 11, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29125540/is-high-folic-acid-intake-a-risk-factor-for-autism-a-review
#2
REVIEW
Darrell Wiens, M Catherine DeSoto
Folate is required for metabolic processes and neural development. Insuring its adequate levels for pregnant women through supplementation of grain-based foods with synthetic folic acid (FA) in order to prevent neural tube defects has been an ongoing public health initiative. However, because women are advised to take multivitamins containing FA before and throughout pregnancy, the supplementation together with natural dietary folates has led to a demographic with high and rising serum levels of unmetabolized FA...
November 10, 2017: Brain Sciences
https://www.readbyqxmd.com/read/29121345/early-postnatal-exposure-to-airborne-fine-particulate-matter-induces-autism-like-phenotypes-in-male-rats
#3
Kang Li, Li Li, Bo Cui, Zhihui Gai, Qiuyue Li, Shumei Wang, Jun Yan, Bencheng Lin, Lei Tian, Huanliang Liu, Xiaohua Liu, Zhuge Xi
Epidemiological studies have revealed that ambient fine particulate matter (PM2.5) exposure is closely associated with autism spectrum disorder (ASD). However, there is a relative paucity of laboratory data to support this epidemic finding. In order to assess the relationship between PM2.5 exposure and ASD, neonatal male Sprague-Dawley (SD) rats were chosen and exposed to PM2.5 (2 or 20 mg/kg body weight, once a day) by intranasal instillation from postnatal day (PND) 8 to 22. It was found that when exposed to PM2...
November 7, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29112530/the-prevalence-of-psychiatric-disorders-and-mental-health-services-utilization-by-parents-and-relatives-living-with-individuals-with-autism-spectrum-disorders-in-puerto-rico
#4
Ernesto Magallón-Neri, Dorilyz Vila, Katyana Santiago, Pedro García, Glorisa Canino
Knowledge about prevalence rates of psychiatric disorders and mental health services use among parents and relatives of persons with autism spectrum disorder (ASD) is limited, particularly when referring to epidemiologic samples. The current study is based on an island-wide probabilistic multistage cluster sample of adult individuals (N = 3062) living in Puerto Rico. Results showed a significantly higher rate of attention deficit hyperactivity disorder and serious mental illness in parents (n = 34) or relatives (n = 34) of ASD individuals, as compared with the Puerto Rico adult population as a whole...
November 4, 2017: Journal of Nervous and Mental Disease
https://www.readbyqxmd.com/read/29104007/perinatal-exposure-to-concentrated-ambient-particulates-results-in-autism-like-behavioral-deficits-in-adult-mice
#5
Jamie S Church, Pamella B Tijerina, Felicity J Emerson, Morgan A Coburn, Jason L Blum, Judith T Zelikoff, Jared J Schwartzer
Exposure to fine ambient particulates (PM2.5) during gestation or neonatally has potent neurotoxic effects. While biological and behavioral data indicate a vulnerability to environmental pollutants across distinct neurodevelopmental windows, the behavioral consequences following exposure across the entire developmental period remain unknown. Moreover, several epidemiological studies support a link between developmental exposure to air pollution and an increased risk of later receiving a diagnosis of autism spectrum disorders (ASD), a neurodevelopmental disorder that persists throughout life...
November 2, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/29083343/forensic-epidemiology-in-italy-principles-and-practice
#6
Valentina Chiesa, Anna Odone, Carlo Signorelli
Forensic epidemiology (FE) implies the use of epidemiological data in the processes and the involvement of epidemiologists in judicial proceedings. FE is essential for the assessment of causal association between the exposure to specific agents and the occurrence of diseases. In this paper we describe FE principles and applications in the Italian context as in recent years FE emerged increasingly as well as the need of experienced and trained epidemiological experts able to navigate legal proceedings. In the literature, the principles of FE have been widely described by different authors, among them: Kennet Rothman who introduced the definition of cause, Sir Austin Bradford Hill who proposed an analytic framework to assess the causal association, and recently by Sana Loue who described the actual legislation and application of FE in the United States...
October 23, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29075431/the-gapmap-project-a-mobile-surveillance-system-to-map-diagnosed-autism-cases-and-gaps-in-autism-services-globally
#7
Jena Daniels, Jessey Schwartz, Nikhila Albert, Michael Du, Dennis P Wall
Although the number of autism diagnoses is on the rise, we have no evidence-based tracking of size and severity of gaps in access to autism-related resources, nor do we have methods to geographically triangulate the locations of the widest gaps in either the US or elsewhere across the globe. To combat these related issues of (1) mapping diagnosed cases of autism and (2) quantifying gaps in access to key intervention services, we have constructed a crowd-based mobile platform called "GapMap" (http://gapmap.stanford...
2017: Molecular Autism
https://www.readbyqxmd.com/read/29063203/cortical-dysplasia-and-autistic-trait-severity-in-children-with-tuberous-sclerosis-complex-a-clinical-epidemiological-study
#8
Sabine E Mous, Iris E Overwater, Rita Vidal Gato, Jorieke Duvekot, Leontine W Ten Hoopen, Maarten H Lequin, Marie-Claire Y de Wit, Gwendolyn C Dieleman
Tuberous Sclerosis Complex (TSC) is characterized by a high prevalence of autism spectrum disorders (ASD). Little is known about the relation between cortical dysplasia and ASD severity in TSC. We assessed ASD severity (using the Autism Diagnostic Observation Scale), tuber and radial migration line (RML) count and location, and cognitive functioning in 52 children with TSC and performed regression and mediation analyses. Tuber and RML count were strongly positively related to ASD severity. However, when correcting for cognitive functioning, the majority of associations became insignificant and only total tuber count remained associated to the severity of restricted/repetitive behaviors...
October 23, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/29049464/clustering-of-neuropsychiatric-disease-in-first-degree-and-second-degree-relatives-of-patients-with-amyotrophic-lateral-sclerosis
#9
Margaret O'Brien, Tom Burke, Mark Heverin, Alice Vajda, Russell McLaughlin, John Gibbons, Susan Byrne, Marta Pinto-Grau, Marwa Elamin, Niall Pender, Orla Hardiman
Importance: Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative condition primarily involving the motor system. There is increasing epidemiologic evidence of an association between ALS and a wider spectrum of neurodegenerative and neuropsychiatric disorders among family members, including schizophrenia and psychotic illness and suicidal behavior. Objective: To examine the frequency and range of neuropsychiatric conditions that occur within individual first-degree and second-degree relatives of patients with ALS...
October 16, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28983852/autism-spectrum-disorder-and-li-fraumeni-syndrome-purely-coincidental-or-mechanistically-associated
#10
Michaela Kuhlen, Julia Taeubner, Dagmar Wieczorek, Arndt Borkhardt
BACKGROUND: Autism spectrum disorders (ASDs) are neurodevelopmental disorders with impaired social interactions and communication and restrictive, repetitive patterns of behaviors, interests, and activities. A recent epidemiological study suggests that children with ASD might have an increased cancer risk. CASE PRESENTATION: The 14.5-year-old boy, previously diagnosed with ASD, was referred with persistent bone pain. Diagnostic work-up confirmed diagnosis of acute lymphoblastic leukemia (ALL); cytogenetic analysis revealed low hypodiploid karyotype with a mutation (c...
October 5, 2017: Molecular and Cellular Pediatrics
https://www.readbyqxmd.com/read/28980151/epidemiology-diagnosis-and-treatment-of-cerebrotendinous-xanthomatosis-ctx
#11
REVIEW
Gerald Salen, Robert D Steiner
Cerebrotendinous xanthomatosis (CTX) is a rare autosomal recessive disorder of bile acid synthesis caused by mutations in the cytochrome P450 CYP27A1 gene that result in production of a defective sterol 27-hydroxylase enzyme. CTX is associated with abnormally high levels of cholestanol in the blood and accumulation of cholestanol and cholesterol in the brain, tendon xanthomas, and bile. Hallmark clinical manifestations of CTX include chronic diarrhea, bilateral cataracts, tendon xanthomas, and neurologic dysfunction...
November 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28936640/autism-spectrum-disorder-and-school-bullying-who-is-the-victim-who-is-the-perpetrator
#12
Soonjo Hwang, Young Shin Kim, Yun-Joo Koh, Bennett L Leventhal
While a growing number of studies indicate associations between experiences of bullying and autism spectrum disorder (ASD), it is not clear what roles comorbid behavioral problems may play. We investigated the experiences of children with ASD as victims and/or perpetrators of bullying. Children with ASD epidemiologically ascertained participated in a cross-sectional study. Although children with ASD showed significantly increased risk for bullying involvement compared to community children, after controlling for comorbid psychopathology and other demographic factors, increased risks for being perpetrators or victim-perpetrators disappeared while risk for being bullied/teased continued to be significantly elevated...
September 21, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28916794/association-among-obesity-overweight-and-autism-spectrum-disorder-a-systematic-review-and-meta-analysis
#13
Zhen Zheng, Li Zhang, Shiping Li, Fengyan Zhao, Yan Wang, Lan Huang, Jinglan Huang, Rong Zou, Yi Qu, Dezhi Mu
Obesity, overweight and autism spectrum disorder (ASD) remain serious public health problems. Although lots of studies have recently explored the association among obesity, overweight and ASD, the findings are inconsistent. Thus, we conducted a meta-analysis of epidemiological studies to examine the association among obesity, overweight and ASD. PubMed, Embase, and the Cochrane Library were used for literature searches to identify eligible studies published in English before November 15, 2016. Relevant studies estimating the association among obesity, overweight and ASD were included...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28915839/risk-of-mortality-among-children-adolescents-and-adults-with-autism-spectrum-disorder-or-attention-deficit-hyperactivity-disorder-and-their-first-degree-relatives-a-protocol-for-a-systematic-review-and-meta-analysis-of-observational-studies
#14
Ferrán Catalá-López, Brian Hutton, Matthew J Page, Manuel Ridao, Jane A Driver, Adolfo Alonso-Arroyo, Jaume Forés-Martos, Diego Macías Saint-Gerons, Eduard Vieta, Alfonso Valencia, Rafael Tabarés-Seisdedos
BACKGROUND: Autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD) are childhood onset neurodevelopmental disorders that may persist into adulthood. ASD and ADHD tend to run in families and may have a significant negative impact on the health and longevity of those with the disorder and their relatives. The aim of this study will be to analyze the risk of mortality among children, adolescents, and adults with ASD or ADHD and their first-degree relatives. METHODS/DESIGN: We will conduct a systematic review and meta-analysis of observational studies...
September 15, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28902840/maternal-gut-bacteria-promote-neurodevelopmental-abnormalities-in-mouse-offspring
#15
Sangdoo Kim, Hyunju Kim, Yeong Shin Yim, Soyoung Ha, Koji Atarashi, Tze Guan Tan, Randy S Longman, Kenya Honda, Dan R Littman, Gloria B Choi, Jun R Huh
Maternal immune activation (MIA) contributes to behavioural abnormalities associated with neurodevelopmental disorders in both primate and rodent offspring. In humans, epidemiological studies suggest that exposure of fetuses to maternal inflammation increases the likelihood of developing autism spectrum disorder. In pregnant mice, interleukin-17a (IL-17a) produced by T helper 17 (TH17) cells (CD4(+) T helper effector cells involved in multiple inflammatory conditions) induces behavioural and cortical abnormalities in the offspring exposed to MIA...
September 13, 2017: Nature
https://www.readbyqxmd.com/read/28890420/perinatal-inflammation-and-adult-psychopathology-from-preclinical-models-to-humans
#16
REVIEW
Amaicha Mara Depino
Perinatal environment plays a crucial role in brain development and determines its function through life. Epidemiological studies and clinical reports link perinatal exposure to infection and/or immune activation to various psychiatric disorders. In addition, accumulating evidence from animal models shows that perinatal inflammation can affect various behaviors relevant to psychiatric disorders such as schizophrenia, autism, anxiety and depression. Remarkably, the effects on behavior and brain function do not always depend on the type of inflammatory stimulus or the perinatal age targeted, so diverse inflammatory events can have similar consequences on the brain...
September 7, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28883881/zinc-and-copper-metabolism-and-risk-of-autism-a-reply-to-sayehmiri-et-al
#17
Keith Fluegge Ba
OBJECTIVE: Sayehmiri et al. recently conducted a meta-analysis to explore the relationship between zinc and copper metabolism and autism spectrum disorders (ASD). Recent reports have elucidated a full behavioral profile of mice exposed to prenatal zinc deficiency and documented a phenotype similar to that found in autism spectrum disorders (ASD). These studies suggest that significant alterations in Zn metabolism may be an important nutritional component in the development of ASD. MATERIALS & METHODS: The idea that prenatal zinc deficiency may be to blame is cursorily challenged...
2017: Iranian Journal of Child Neurology
https://www.readbyqxmd.com/read/28826398/autism-spectrum-disorders-asd-in-south-asia-a-systematic-review
#18
Mohammad Didar Hossain, Helal Uddin Ahmed, M M Jalal Uddin, Waziul Alam Chowdhury, Mohd S Iqbal, Razin Iqbal Kabir, Imran Ahmed Chowdhury, Afzal Aftab, Pran Gopal Datta, Golam Rabbani, Saima Wazed Hossain, Malabika Sarker
BACKGROUND: Autism spectrum disorders (ASD) are a group of complex neurodevelopmental disorders. The prevalence of ASD in many South Asian countries is still unknown. The aim of this study was to systematically review available epidemiological studies of ASD in this region to identify gaps in our current knowledge. METHODS: We searched, collected and evaluated articles published between January 1962 and July 2016 which reported the prevalence of ASD in eight South Asian countries...
August 1, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28799289/prenatal-exposure-to-fever-is-associated-with-autism-spectrum-disorder-in-the-boston-birth-cohort
#19
Martha Brucato, Christine Ladd-Acosta, Mengying Li, Deanna Caruso, Xiumei Hong, Jamie Kaczaniuk, Elizabeth A Stuart, M Daniele Fallin, Xiaobin Wang
Autism spectrum disorder (ASD) is phenotypically and etiologically heterogeneous, with evidence for genetic and environmental contributions to disease risk. Research has focused on the prenatal period as a time where environmental exposures are likely to influence risk for ASD. Epidemiological studies have shown significant associations between prenatal exposure to maternal immune activation (MIA), caused by infections and fever, and ASD. However, due to differences in study design and exposure measurements no consistent patterns have emerged revealing specific times or type of MIA exposure that are most important to ASD risk...
November 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28765079/developmental-neurotoxicity-and-autism-a-potential-link-between-indoor-neuroactive-pollutants-and-the-curious-birth-order-risk-factor
#20
REVIEW
Wesley A Gray, Vincent A Billock
Epidemiological and demographic studies find an increased risk of autism among first-borns. Toxicological studies show that some semi-volatile substances found in infant products produce adverse effects in neural and endocrine systems of animals, including behavioral and developmental effects. Several factors elevate the exposure of human infants to these chemicals. The highest exposures found in infants are comparable to the exposures that induce neural toxicity in animals. A review of these literatures suggests a linking hypothesis that could bridge the epidemiological and toxicological lines of evidence: an infant's exposure to neuroactive compounds emitted by infant products is increased by product newness and abundance; exposure is likely maximized for first-born children in families that can afford new products...
November 2017: International Journal of Developmental Neuroscience
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