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Frye RE, Rincon N, McCarty PJ, Brister D, Scheck AC, Rossignol DA. Biomarkers of mitochondrial dysfunction in autism spectrum disorder: A systematic review and meta-analysis. Neurobiol Dis 2024; 197:106520. [PMID: 38703861 DOI: 10.1016/j.nbd.2024.106520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 04/27/2024] [Accepted: 04/29/2024] [Indexed: 05/06/2024] Open
Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental disorder affecting 1 in 36 children and is associated with physiological abnormalities, most notably mitochondrial dysfunction, at least in a subset of individuals. This systematic review and meta-analysis discovered 204 relevant articles which evaluated biomarkers of mitochondrial dysfunction in ASD individuals. Significant elevations (all p < 0.01) in the prevalence of lactate (17%), pyruvate (41%), alanine (15%) and creatine kinase (9%) were found in ASD. Individuals with ASD had significant differences (all p < 0.01) with moderate to large effect sizes (Cohen's d' ≥ 0.6) compared to controls in mean pyruvate, lactate-to-pyruvate ratio, ATP, and creatine kinase. Some studies found abnormal TCA cycle metabolites associated with ASD. Thirteen controlled studies reported mitochondrial DNA (mtDNA) deletions or variations in the ASD group in blood, peripheral blood mononuclear cells, lymphocytes, leucocytes, granulocytes, and brain. Meta-analyses discovered significant differences (p < 0.01) in copy number of mtDNA overall and in ND1, ND4 and CytB genes. Four studies linked specific mtDNA haplogroups to ASD. A series of studies found a subgroup of ASD with elevated mitochondrial respiration which was associated with increased sensitivity of the mitochondria to physiological stressors and neurodevelopmental regression. Lactate, pyruvate, lactate-to-pyruvate ratio, carnitine, and acyl-carnitines were associated with clinical features such as delays in language, social interaction, cognition, motor skills, and with repetitive behaviors and gastrointestinal symptoms, although not all studies found an association. Lactate, carnitine, acyl-carnitines, ATP, CoQ10, as well as mtDNA variants, heteroplasmy, haplogroups and copy number were associated with ASD severity. Variability was found across biomarker studies primarily due to differences in collection and processing techniques as well as the intrinsic heterogeneity of the ASD population. Several studies reported alterations in mitochondrial metabolism in mothers of children with ASD and in neonates who develop ASD. Treatments targeting mitochondria, particularly carnitine and ubiquinol, appear beneficial in ASD. The link between mitochondrial dysfunction in ASD and common physiological abnormalities in individuals with ASD including gastrointestinal disorders, oxidative stress, and immune dysfunction is outlined. Several subtypes of mitochondrial dysfunction in ASD are discussed, including one related to neurodevelopmental regression, another related to alterations in microbiome metabolites, and another related to elevations in acyl-carnitines. Mechanisms linking abnormal mitochondrial function with alterations in prenatal brain development and postnatal brain function are outlined. Given the multisystem complexity of some individuals with ASD, this review presents evidence for the mitochondria being central to ASD by contributing to abnormalities in brain development, cognition, and comorbidities such as immune and gastrointestinal dysfunction as well as neurodevelopmental regression. A diagnostic approach to identify mitochondrial dysfunction in ASD is outlined. From this evidence, it is clear that many individuals with ASD have alterations in mitochondrial function which may need to be addressed in order to achieve optimal clinical outcomes. The fact that alterations in mitochondrial metabolism may be found during pregnancy and early in the life of individuals who eventually develop ASD provides promise for early life predictive biomarkers of ASD. Further studies may improve the understanding of the role of the mitochondria in ASD by better defining subgroups and understanding the molecular mechanisms driving some of the unique changes found in mitochondrial function in those with ASD.
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Affiliation(s)
- Richard E Frye
- Autism Discovery and Treatment Foundation, Phoenix, AZ, USA; Southwest Autism Research and Resource Center, Phoenix, AZ, USA; Rossignol Medical Center, Phoenix, AZ, USA.
| | | | - Patrick J McCarty
- Tulane University School of Medicine, New Orleans, LA 70113, United States of America.
| | | | - Adrienne C Scheck
- Autism Discovery and Treatment Foundation, Phoenix, AZ, USA; Department of Child Health, University of Arizona College of Medicine - Phoenix, Phoenix, AZ 85004, United States of America.
| | - Daniel A Rossignol
- Autism Discovery and Treatment Foundation, Phoenix, AZ, USA; Rossignol Medical Center, Aliso Viejo, CA, USA
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Parker W, Anderson LG, Jones JP, Anderson R, Williamson L, Bono-Lunn D, Konsoula Z. The Dangers of Acetaminophen for Neurodevelopment Outweigh Scant Evidence for Long-Term Benefits. CHILDREN (BASEL, SWITZERLAND) 2023; 11:44. [PMID: 38255358 PMCID: PMC10814214 DOI: 10.3390/children11010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/20/2023] [Accepted: 12/27/2023] [Indexed: 01/24/2024]
Abstract
Based on available data that include approximately 20 lines of evidence from studies in laboratory animal models, observations in humans, correlations in time, and pharmacological/toxicological considerations, it has been concluded without reasonable doubt and with no evidence to the contrary that exposure of susceptible babies and children to acetaminophen (paracetamol) induces many, if not most, cases of autism spectrum disorder (ASD). However, the relative number of cases of ASD that might be induced by acetaminophen has not yet been estimated. Here, we examine a variety of evidence, including the acetaminophen-induced reduction of social awareness in adults, the prevalence of ASD through time, and crude estimates of the relative number of ASD cases induced by acetaminophen during various periods of neurodevelopment. We conclude that the very early postpartum period poses the greatest risk for acetaminophen-induced ASD, and that nearly ubiquitous use of acetaminophen during early development could conceivably be responsible for the induction in the vast majority, perhaps 90% or more, of all cases of ASD. Despite over a decade of accumulating evidence that acetaminophen is harmful for neurodevelopment, numerous studies demonstrate that acetaminophen is frequently administered to children in excess of currently approved amounts and under conditions in which it provides no benefit. Further, studies have failed to demonstrate long-term benefits of acetaminophen for the pediatric population, leaving no valid rationale for continued use of the drug in that population given its risks to neurodevelopment.
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Affiliation(s)
- William Parker
- Department of Psychology and Neuroscience, University of North Carolina, Chapel Hill, NC 27599, USA
- WPLab, Inc., Durham, NC 27707, USA
- Department of Surgery, Duke University Medical Center, Durham, NC 27710, USA
| | | | | | | | - Lauren Williamson
- Department of Biological Sciences, Northern Kentucky University, Highland Heights, KY 41099, USA;
| | - Dillan Bono-Lunn
- Department of Public Policy, University of North Carolina, Chapel Hill, NC 27599, USA;
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Bilgiç A, Ferahkaya H, Karagöz H, Kılınç İ, Energin VM. Serum claudin-5, claudin-11, occludin, vinculin, paxillin, and beta-catenin levels in preschool children with autism spectrum disorder. Nord J Psychiatry 2023; 77:506-511. [PMID: 36662163 DOI: 10.1080/08039488.2023.2168055] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 11/05/2022] [Accepted: 01/04/2023] [Indexed: 01/21/2023]
Abstract
AIM Increased intestinal and blood-brain barriers (BBB) permeability has been suggested to have a role in autism spectrum disorder (ASD). Claudin-5, claudin-11, occludin, β-catenin, vinculin, and paxillin are crucial components of these barriers. This study assessed concentrations of these molecules in preschool children with ASD. METHODS A total of 80 children with ASD and 40 controls aged 18-60 months were enrolled in this study. Serum levels of biochemical variables were determined using commercial enzyme-linked immunosorbent assay kits. RESULTS Serum claudin-11, occludin, and β-catenin levels were significantly higher in the ASD group than in the control group. However, no significant difference for serum claudin-5, vinculin, and paxillin levels was detected between the groups. CONCLUSION These findings suggest that claudin-11, occludin, and β-catenin may be involved in the pathogenesis of ASD. These proteins may affect the brain by causing dysregulation in intestinal or blood-brain barrier permeability or with other unknown mechanisms.
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Affiliation(s)
- Ayhan Bilgiç
- Faculty of Medicine, Izmir University of Economics, İzmir, Turkey
| | - Hurşit Ferahkaya
- Department of Child and Adolescent Psychiatry, Dr. Ali Kemal Belviranlı Gynecology and Pediatrics Hospital, Konya, Turkey
| | - Hülya Karagöz
- Department of Child and Adolescent Psychiatry, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - İbrahim Kılınç
- Department of Biochemistry, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Vesile Meltem Energin
- Department of Child Health and Disease, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
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Yuan Z, Yu Z, Zhang Y, Yang H. Analysis of the Clinical Diagnostic Value of GMFB in Cerebral Infarction. Curr Pharm Biotechnol 2020; 21:955-963. [PMID: 32039676 DOI: 10.2174/1389201021666200210102425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 12/12/2019] [Accepted: 01/22/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Glial Maturation Factor Beta (GMFB) is a highly conserved brain-enriched protein implicated in immunoregulation, neuroplasticity and apoptosis, processes central to neural injury and repair following cerebral ischaemia. Therefore, we examined if changes in neurocellular GMFB expression and release can be used to assess brain injury following ischaemia. METHODS AND RESULTS Immunofluorescence staining, Western blotting, immunohistochemistry and ELISA were used to measure GMFB in cultured neurons and astrocytes, rat brain tissues and plasma samples from stroke model rats and stroke patients, while cell viability assays, TTC staining and micro- PET were used to assess neural cell death and infarct severity. Immunofluorescence and immunohistochemistry revealed GMFB expression mainly in astrocyte and neuronal nuclei but also in neuronal axons and dendrites. Free GMFB concentration increased progressively in the culture medium during hypoxia-hypoglycaemia treatment. Plasma GMFB concentration increased in rats subjected to middle cerebral artery occlusion (MCAO, a model of stroke-reperfusion) and in stroke patients. Plasma GMFB in MCAO model rats was strongly correlated with infarct size (R2=0.9582). Plasma GMFB concentration was also markedly elevated in stroke patients within 24 h of onset and remained elevated for more than one week. Conversely, plasma GMFB elevations were not significant in myocardial infarct patients and stroke patients without infarction. CONCLUSION GMFB has the prerequisite stability, expression specificity and response dynamics to serve as a reliable indicator of ischaemic injury in animal models and stroke patients. Plasma GMFB may be a convenient non-invasive adjunct to neuroimaging for stroke diagnosis and prognosis.
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Affiliation(s)
- Zhaohu Yuan
- Department of Blood Transfusion, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou 510180, Guangdong, China
| | - Zhiwu Yu
- Division of Laboratory Science, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou 510095, Guangdong, China
| | - Yiyu Zhang
- Department of Blood Transfusion, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou 510180, Guangdong, China
| | - Huikuan Yang
- Department of Blood Transfusion, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou 510180, Guangdong, China
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Yang X, Li H, Ge J, Chao H, Li G, Zhou Z, Liu J. The level of GNE and its relationship with behavioral phenotypes in children with autism spectrum disorder. Medicine (Baltimore) 2020; 99:e21013. [PMID: 32664106 PMCID: PMC7360203 DOI: 10.1097/md.0000000000021013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Autism spectrum disorder (ASD) is a serious nervous system disease, and the cause is not known. Sialic acid (SA) is an indispensable nutrient for early brain development. In previous study, it was found that the SA level of ASD group was lower than that of control group. However, the reason for this has not well explained. A case-control study was conducted to understand the association between the SA synthase enzyme regulatory gene and ASD. The study sample included 65 ASD children and 64 healthy children. The levels of the GNE gene were measured, which encodes UDP-GlcNAc 2-epimerase/ManNAc kinase (GNE), a key enzyme in SA biosynthesis. The symptom severity, intelligence development level, and behavioral performance of ASD children were estimated. There was a significant difference in the levels of GNE between the ASD and control groups (t = 2.028, P = .045). Moreover, the levels of GNE were negatively related to stereotypical behaviors according to the Autism Diagnostic Observation Schedule (ADOS) assessment (r = -0.386, P = .039). However, there is no the correlation between the levels of GNE and autistic severity. As evaluated through the Social Responsiveness Scale (SRS), the levels of GNE were negatively associated with autistic mannerisms scores, social cognition scores and SRS total scores in the children with ASD (r = -0.314, P = .020). These results indicate that the GNE gene may be associated with autism spectrum disorder, and it is also related to autistic behavioral performance, such as stereotypical behaviors, autistic mannerisms, and social cognition ability. Our data suggest that future studies to explore the causal relationship between GNE and the etiology of ASD may be needed.
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Affiliation(s)
- Xiaolei Yang
- Department of Preventive Medicine, School of Public Health
- Postdoctoral Workstation, Research Institute of Medical and Pharmacy, Qiqihar Medical University, Qiqihar
- Postdoctoral Research Station, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Hongjie Li
- Department of Preventive Medicine, School of Public Health
| | - Jie Ge
- Department of Preventive Medicine, School of Public Health
| | - Hong Chao
- Department of Preventive Medicine, School of Public Health
| | - Gang Li
- Department of Preventive Medicine, School of Public Health
| | - Zhongguang Zhou
- Postdoctoral Research Station, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Jicheng Liu
- Postdoctoral Workstation, Research Institute of Medical and Pharmacy, Qiqihar Medical University, Qiqihar
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Ayaydın H, Kirmit A, Çelik H, Akaltun İ, Koyuncu İ, Bilgen Ulgar Ş. High Serum Levels of Serum 100 Beta Protein, Neuron-specific Enolase, Tau, Active Caspase-3, M30 and M65 in Children with Autism Spectrum Disorders. CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE 2020; 18:270-278. [PMID: 32329316 PMCID: PMC7242104 DOI: 10.9758/cpn.2020.18.2.270] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/24/2019] [Accepted: 01/14/2020] [Indexed: 12/27/2022]
Abstract
Objective The purpose of this study was therefore to investigate whether neuronal, axonal, and glial cell markers (Neuron-specific enolase [NSE], tau, serum 100 beta protein [S100B], respectively) and apoptosis markers (active caspase 3, M30, M65) and whether these parameters can be used as diagnostic biomarkers in autism spectrum disorders (ASD). Methods This study measured the serum S100B, NSE, tau, active caspase 3, M30, and M65 levels in 43 patients with ASD (aged 3−12 years) and in 41 age- and sex-matched healthy controls. ASD severity was rated using the Childhood Autism Rating Scale. The serum levels were determined in the biochemistry laboratory using the ELISA technique. The receiver operator characteristics curve method was employed to evaluate the accuracy of the parameters in diagnosing ASD. Results Serum S100B, tau, NSE, active caspase-3, M30, and M65 levels were significantly higher in the patient group than in the control group (p < 0.001, p = 0.002, p = 0.002, p = 0.005, p < 0.001, and p = 0.004, respectively). The cut-off value of S100B was 48.085 pg/ml (sensitivity: 74.4%, specificity: 80.5%, areas under the curve: 0.879, p < 0.001). Conclusion Apoptosis increased in children with ASD, and neuronal, axonal, and glial cell injury was observed. In addition, S100B may be an important diagnostic biomarker in patients with ASD. Apoptosis, and neuronal, axonal and astrocyte pathologies may play a significant role in the pathogenesis of ASD, and further studies are now required to confirm this.
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Affiliation(s)
- Hamza Ayaydın
- Departments of Child and Adolescent Psychiatry, Gaziantep Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey
| | - Adnan Kirmit
- Departments of Biochemistry, Gaziantep Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey
| | - Hakim Çelik
- Departments of Physiology, Faculty of Medicine, Harran University, Şanlıurfa, Gaziantep Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey
| | - İsmail Akaltun
- Department of Child and Adolescent Psychiatry, Gaziantep Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey
| | - İsmail Koyuncu
- Departments of Biochemistry, Gaziantep Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey
| | - Şermin Bilgen Ulgar
- Departments of Child and Adolescent Psychiatry, Gaziantep Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey
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Tokunaga A, Akiyama T, Miyamura T, Honda S, Nakane H, Iwanaga R, Tanaka G. Neonatal behavior and social behavior and sensory issues in 18-month toddlers. Pediatr Int 2019; 61:1202-1209. [PMID: 31655009 DOI: 10.1111/ped.14033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 10/11/2018] [Accepted: 07/11/2019] [Indexed: 11/27/2022]
Abstract
BACKGROUND There has long existed a need for early detection and early intervention for children with autism spectrum disorder. Accordingly, the aim of this study was to demonstrate, in a prospective manner, the relationship between behavioral features during the neonatal period and social behavior and sensory issues at 18 months. METHODS Participants were 105 full-term infants considered "healthy" by an obstetrician. The behavioral features of the infants were evaluated using the Neonatal Behavioral Assessment Scale (NBAS) between 2 and 7 days after birth. Follow-up assessments were conducted 18 months later using a Japanese version of the Modified Checklist for Autism in Toddlers (M-CHAT-JV) and the Infant / Toddler Sensory Profile (ITSP). RESULTS Sixteen (15.2%) of the 105 infants were M-CHAT-JV-positive. There were significant differences between the M-CHAT-JV-positive and M-CHAT-JV-negative groups in two of the NBAS clusters: orientation and motor. We observed a significant negative correlation between the NBAS orientation cluster and the ITSP "low registration" and "auditory processing" sections, as well as between the NBAS motor cluster and the ITSP "sensation avoiding" and "tactile processing" sections. Logistic regression analysis showed that the NBAS orientation cluster and ITSP low registration were significantly associated with the M-CHAT-JV at 18 months. CONCLUSIONS The results suggest a relationship between the NBAS orientation cluster in full-term neonates and their social behavior and sensory features at 18 months.
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Affiliation(s)
- Akiko Tokunaga
- Department of Psychiatric Rehabilitation Science, Unit Rehabilitation Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | | | | | - Sumihisa Honda
- Department of Public Health and Nursing, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hideyuki Nakane
- Department of Psychiatric Rehabilitation Science, Unit Rehabilitation Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Ryoichiro Iwanaga
- Department of Psychiatric Rehabilitation Science, Unit Rehabilitation Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Goro Tanaka
- Department of Psychiatric Rehabilitation Science, Unit Rehabilitation Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Neuropsychiatric Symptoms, Parenting Stress and Social Support in Chinese Mothers of Children with Autism Spectrum Disorder. Curr Med Sci 2019; 39:291-297. [PMID: 31016524 DOI: 10.1007/s11596-019-2033-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/10/2018] [Indexed: 01/03/2023]
Abstract
Although little is known about the current situation regarding autism spectrum disorder (ASD) in mainland China, psychiatric disorders are common among Chinese mothers of preschool children with ASD. Previous studies showed ASD child's behavioral symptoms, maternal anxiety, and maternal depressive symptoms were associated with overall parenting stress in northern China. In the present study, we retrospectively analyzed medical records at the hospital related to neuropsychiatric symptoms, parenting stress and social support in mothers of children with ASD from southern China. A total of 80 mothers of children with ASD were screened. Among them, 34 mothers were in low-functioning ASD group (L-ASD group) and 46 mothers were in high-functioning ASD group (H-ASD group). Identification of the ASD cases was confirmed with a Revised Autism Diagnostic Inventory. Neuropsychiatric symptoms, parenting stress and social support were measured by neuropsychiatric inventory (NPI), parenting stress index short form (PSI-SF), and multi-dimensional scale of perceived social support (MSPSS). Total mean score of the NPI in the L-ASD group was significantly higher than that in the H-ASD group (P<0.01). The subscale scores of NPI, including depression, anxiety, apathy, irritability, agitation, night time behavior disturbances and change in appetite were significantly higher in the L-ASD group than those in the H-ASD group (P<0.01 or P<0.05). Meanwhile, the total PSI-SF scores and the scores of parental distress (PD), parental-child dysfunctional interaction (PCDI) and difficult child (DC) in the L-ASD group were significantly higher than those in the H-ASD group (P<0.01 or P<0.05). The total score of MSPSS was also higher in the L-ASD group than in the H-ASD group (P<0.01). This study goes further to show the neuropsychiatric symptoms and parenting stress are significantly higher in mothers of children with ASD, and more social supports are needed for mothers of children with ASD from southern China, especially for mothers of children with low-functioning ASD.
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Rose S, Niyazov DM, Rossignol DA, Goldenthal M, Kahler SG, Frye RE. Clinical and Molecular Characteristics of Mitochondrial Dysfunction in Autism Spectrum Disorder. Mol Diagn Ther 2018; 22:571-593. [PMID: 30039193 PMCID: PMC6132446 DOI: 10.1007/s40291-018-0352-x] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Autism spectrum disorder (ASD) affects ~ 2% of children in the United States. The etiology of ASD likely involves environmental factors triggering physiological abnormalities in genetically sensitive individuals. One of these major physiological abnormalities is mitochondrial dysfunction, which may affect a significant subset of children with ASD. Here we systematically review the literature on human studies of mitochondrial dysfunction related to ASD. Clinical aspects of mitochondrial dysfunction in ASD include unusual neurodevelopmental regression, especially if triggered by an inflammatory event, gastrointestinal symptoms, seizures, motor delays, fatigue and lethargy. Traditional biomarkers of mitochondrial disease are widely reported to be abnormal in ASD, but appear non-specific. Newer biomarkers include buccal cell enzymology, biomarkers of fatty acid metabolism, non-mitochondrial enzyme function, apoptosis markers and mitochondrial antibodies. Many genetic abnormalities are associated with mitochondrial dysfunction in ASD, including chromosomal abnormalities, mitochondrial DNA mutations and large-scale deletions, and mutations in both mitochondrial and non-mitochondrial nuclear genes. Mitochondrial dysfunction has been described in immune and buccal cells, fibroblasts, muscle and gastrointestinal tissue and the brains of individuals with ASD. Several environmental factors, including toxicants, microbiome metabolites and an oxidized microenvironment are shown to modulate mitochondrial function in ASD tissues. Investigations of treatments for mitochondrial dysfunction in ASD are promising but preliminary. The etiology of mitochondrial dysfunction and how to define it in ASD is currently unclear. However, preliminary evidence suggests that the mitochondria may be a fruitful target for treatment and prevention of ASD. Further research is needed to better understand the role of mitochondrial dysfunction in the pathophysiology of ASD.
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Affiliation(s)
- Shannon Rose
- Department of Pediatrics, University of Arkansas for Medical Sciences and Arkansas Children's Research Institute, Little Rock, AR, USA
| | - Dmitriy M Niyazov
- Section of Medical Genetics, Ochsner Health System, New Orleans, LA, USA
| | | | - Michael Goldenthal
- Department of Pediatrics, Neurology Section, St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA, USA
| | - Stephen G Kahler
- Department of Pediatrics, University of Arkansas for Medical Sciences and Arkansas Children's Research Institute, Little Rock, AR, USA
| | - Richard E Frye
- Division of Neurodevelopmental Disorders, Department of Neurology, Barrow Neurological Institute, Phoenix Children's Hospital, 1919 E Thomas St, Phoenix, AZ, USA.
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA.
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Blood-brain barrier regulation in psychiatric disorders. Neurosci Lett 2018; 726:133664. [PMID: 29966749 DOI: 10.1016/j.neulet.2018.06.033] [Citation(s) in RCA: 159] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 06/18/2018] [Indexed: 02/07/2023]
Abstract
The blood-brain barrier (BBB) is a dynamic interface between the peripheral blood supply and the cerebral parenchyma, controlling the transport of material to and from the brain. Tight junctions between the endothelial cells of the cerebral microvasculature limit the passage of large, negatively charged molecules via paracellular diffusion whereas transcellular transportation across the endothelial cell is controlled by a number of mechanisms including transporter proteins, endocytosis, and diffusion. Here, we review the evidence that perturbation of these processes may underlie the development of psychiatric disorders including schizophrenia, autism spectrum disorder (ASD), and affective disorders. Increased permeability of the BBB appears to be a common factor in these disorders, leading to increased infiltration of peripheral material into the brain culminating in neuroinflammation and oxidative stress. However, although there is no common mechanism underpinning BBB dysfunction even within each particular disorder, the tight junction protein claudin-5 may be a clinically relevant target given that both clinical and pre-clinical research has linked it to schizophrenia, ASD, and depression. Additionally, we discuss the clinical significance of the BBB in diagnosis (genetic markers, dynamic contrast-enhanced-magnetic resonance imaging, and blood biomarkers) and in treatment (drug delivery).
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Esnafoglu E, Ayyıldız SN, Cırrık S, Erturk EY, Erdil A, Daglı A, Noyan T. Evaluation of serum Neuron‐specific enolase, S100B, myelin basic protein and glial fibrilliary acidic protein as brain specific proteins in children with autism spectrum disorder. Int J Dev Neurosci 2017; 61:86-91. [DOI: 10.1016/j.ijdevneu.2017.06.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 06/12/2017] [Accepted: 06/30/2017] [Indexed: 12/11/2022] Open
Affiliation(s)
- Erman Esnafoglu
- Department of Child and Adolescent PsychiatryTraining and Research HospitalFaculty of MedicineOrdu UniversityOrduTurkey
| | - Sema Nur Ayyıldız
- Department of BiochemistryTraining and Research HospitalFaculty of MedicineOrdu UniversityOrduTurkey
| | - Selma Cırrık
- Department of Medical Physiology, Faculty of MedicineOrdu UniversityOrduTurkey
| | - Emine Yurdakul Erturk
- Department of PediatryTraining and Research HospitalFaculty of MedicineOrdu UniversityOrduTurkey
| | - Abdullah Erdil
- Department of PediatryTraining and Research HospitalFaculty of MedicineOrdu UniversityOrduTurkey
| | - Abdullah Daglı
- Department of PediatryTraining and Research HospitalFaculty of MedicineOrdu UniversityOrduTurkey
| | - Tevfik Noyan
- Department of BiochemistryTraining and Research HospitalFaculty of MedicineOrdu UniversityOrduTurkey
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