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Benitah KC, Kavaliers M, Ossenkopp KP. The enteric metabolite, propionic acid, impairs social behavior and increases anxiety in a rodent ASD model: Examining sex differences and the influence of the estrous cycle. Pharmacol Biochem Behav 2023; 231:173630. [PMID: 37640163 DOI: 10.1016/j.pbb.2023.173630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/10/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
Research suggests that certain gut and dietary factors may worsen behavioral features of autism spectrum disorder (ASD). Treatment with propionic acid (PPA) has been found to create both brain and behavioral responses in rats that are characteristic of ASD in humans. A consistent male bias in human ASD prevalence has been observed, and several sex-differential genetic and hormonal factors have been suggested to contribute to this bias. The majority of PPA studies in relation to ASD focus on male subjects; research examining the effects of PPA in females is scarce. The present study includes two experiments. Experiment 1 explored sex differences in the effects of systemic administration of PPA (500 mg/kg, ip) on adult rodent social behavior and anxiety (light-dark test). Experiment 2 investigated differential effects of systemic administration of PPA (500 mg/kg) on social behavior and anxiety in relation to fluctuating estrogen and progesterone levels during the adult rodent estrous cycle. PPA treatment impaired social behavior and increased anxiety in females to the same degree in comparison to PPA-treated males. As well, females treated with PPA in their diestrus phase did not differ significantly in comparison to females administered PPA in their proestrus phase, in terms of reduced social behavior and increased anxiety.
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Affiliation(s)
- Katie C Benitah
- Graduate Program in Neuroscience, University of Western Ontario, London, Ontario, Canada
| | - Martin Kavaliers
- Graduate Program in Neuroscience, University of Western Ontario, London, Ontario, Canada; Department of Psychology, University of Western Ontario, London, Ontario, Canada; Department of Psychology and Neuroscience Program, University of Guelph, Guelph, Ontario, Canada
| | - Klaus-Peter Ossenkopp
- Graduate Program in Neuroscience, University of Western Ontario, London, Ontario, Canada; Department of Psychology, University of Western Ontario, London, Ontario, Canada.
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2
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Li F, Ke H, Wang S, Mao W, Fu C, Chen X, Fu Q, Qin X, Huang Y, Li B, Li S, Xing J, Wang M, Deng W. Leaky Gut Plays a Critical Role in the Pathophysiology of Autism in Mice by Activating the Lipopolysaccharide-Mediated Toll-Like Receptor 4–Myeloid Differentiation Factor 88–Nuclear Factor Kappa B Signaling Pathway. Neurosci Bull 2022:10.1007/s12264-022-00993-9. [DOI: 10.1007/s12264-022-00993-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 08/09/2022] [Indexed: 12/23/2022] Open
Abstract
AbstractIncreased intestinal barrier permeability, leaky gut, has been reported in patients with autism. However, its contribution to the development of autism has not been determined. We selected dextran sulfate sodium (DSS) to disrupt and metformin to repair the intestinal barrier in BTBR T+tf/J autistic mice to test this hypothesis. DSS treatment resulted in a decreased affinity for social proximity; however, autistic behaviors in mice were improved after the administration of metformin. We found an increased affinity for social proximity/social memory and decreased repetitive and anxiety-related behaviors. The concentration of lipopolysaccharides in blood decreased after the administration of metformin. The expression levels of the key molecules in the toll-like receptor 4 (TLR4)–myeloid differentiation factor 88 (MyD88)–nuclear factor kappa B (NF-κB) pathway and their downstream inflammatory cytokines in the cerebral cortex were both repressed. Thus, “leaky gut” could be a trigger for the development of autism via activation of the lipopolysaccharide-mediated TLR4–MyD88–NF-κB pathway.
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da Rosa N, de Medeiros FD, de Oliveira J, Laurentino AOM, Peretti EM, Machado RS, Fortunato JJ, Petronilho F. 6-Shogaol improves behavior and memory in Wistar rats prenatally exposed to lipopolysaccharide. Int J Dev Neurosci 2021; 82:39-49. [PMID: 34755374 DOI: 10.1002/jdn.10157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/27/2021] [Accepted: 11/05/2021] [Indexed: 11/08/2022] Open
Abstract
OBJECTIVE 6-Shogaol, bioactive compound of Zingiber officinale Roscoe, has anti-inflammatory, antioxidant, and neuroprotective properties. The objective of the present study was to verify the effect of 6-shogaol on behavioral parameters in a preclinical model based on a maternal immune activation (MIA) by lipopolysaccharide (LPS). METHODOLOGY Twelve pregnant Wistar rats received 100-μg/kg LPS or saline solution on gestational day (GD) 9.5. Male offspring participated in the study and in the postnatal day (PND) 30 and 55 were supplemented with 6-shogaol or saline solution, by gavage at a dose of 10 mg/kg/day, orally for 5 days. In the PND 35 and 60 was performed the behavioral tests: grooming, crossing, and rearing that evaluated repetitive movements, anxiety, and interest in the new, respectively, and the inhibitory avoidance test that evaluated short-term (STM) and long-term memory (LTM). RESULT Prenatal exposure to LPS increased the grooming and crossing episodes at different ages and reduced rearing episodes in PND 37. Treatment with 6-shogaol reversed these parameters. In the inhibitory avoidance test, an improvement of memory was identified with 6-shogaol in the STM and LTM at both ages comparing training and test session of treated groups and between groups. CONCLUSION Administration of 6-shogaol reverses the stereotypy, exploratory behavior, and memory impairment in prenatal LPS-exposed offspring, acting as a promising therapeutic component against brain disorders associated with the process of MIA.
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Affiliation(s)
- Naiana da Rosa
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Fabiana Durante de Medeiros
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Juliana de Oliveira
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Ana Olívia Martins Laurentino
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Eduardo Medeiros Peretti
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Richard Simon Machado
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Jucélia Jeremias Fortunato
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
| | - Fabrícia Petronilho
- Laboratory of Neurobiology of Inflammatory and Metabolic Processes, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNISUL), Tubarão, Brazil
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Baj J, Flieger W, Flieger M, Forma A, Sitarz E, Skórzyńska-Dziduszko K, Grochowski C, Maciejewski R, Karakuła-Juchnowicz H. Autism spectrum disorder: Trace elements imbalances and the pathogenesis and severity of autistic symptoms. Neurosci Biobehav Rev 2021; 129:117-132. [PMID: 34339708 DOI: 10.1016/j.neubiorev.2021.07.029] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 07/22/2021] [Accepted: 07/26/2021] [Indexed: 02/08/2023]
Abstract
The identification of biomarkers as diagnostic tools and predictors of response to treatment of neurological developmental disorders (NDD) such as schizophrenia (SZ), attention deficit hyperactivity disorder (ADHD), or autism spectrum disorder (ASD), still remains an important challenge for clinical medicine. Metallomic profiles of ASD patients cover, besides essential elements such as cobalt, chromium, copper, iron, manganese, molybdenum, zinc, selenium, also toxic metals burden of: aluminum, arsenic, mercury, lead, beryllium, nickel, cadmium. Performed studies indicate that children with ASD present a reduced ability of eliminating toxic metals, which leads to these metals' accumulation and aggravation of autistic symptoms. Extensive metallomic studies allow a better understanding of the importance of trace elements as environmental factors in the pathogenesis of ASD. Even though a mineral imbalance is a fact in ASD, we are still expecting relevant tests and the elaboration of reference levels of trace elements as potential biomarkers useful in diagnosis, prevention, and treatment of ASD.
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Affiliation(s)
- Jacek Baj
- Department of Anatomy, Medical University of Lublin, Jaczewskiego Street 8b, 20-400, Lublin, Poland.
| | - Wojciech Flieger
- Faculty of Medicine, Medical University of Lublin, Aleje Racławickie 1, 20-059, Lublin, Poland
| | - Michał Flieger
- Faculty of Medicine, Medical University of Lublin, Aleje Racławickie 1, 20-059, Lublin, Poland
| | - Alicja Forma
- Chair and Department of Forensic Medicine, Medical University of Lublin, Jaczewskiego Street 8b, 20-090, Lublin, Poland
| | - Elżbieta Sitarz
- Chair and 1st Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin, Gluska Street 1, 20-439, Lublin, Poland
| | - Katarzyna Skórzyńska-Dziduszko
- Chair and Department of Human Physiology, Medical University of Lublin, Radziwillowska Street 11, Lublin, 20-080, Poland
| | - Cezary Grochowski
- Laboratory of Virtual Man, Chair of Anatomy, Medical University of Lublin, Jaczewskiego Street 8b, 20-400, Lublin, Poland
| | - Ryszard Maciejewski
- Department of Anatomy, Medical University of Lublin, Jaczewskiego Street 8b, 20-400, Lublin, Poland
| | - Hanna Karakuła-Juchnowicz
- Chair and 1st Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin, Gluska Street 1, 20-439, Lublin, Poland; Department of Clinical Neuropsychiatry, Medical University of Lublin, Gluska Street 1, 20-439, Lublin, Poland
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5
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Martinat M, Rossitto M, Di Miceli M, Layé S. Perinatal Dietary Polyunsaturated Fatty Acids in Brain Development, Role in Neurodevelopmental Disorders. Nutrients 2021; 13:1185. [PMID: 33918517 PMCID: PMC8065891 DOI: 10.3390/nu13041185] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/30/2021] [Accepted: 03/30/2021] [Indexed: 12/26/2022] Open
Abstract
n-3 and n-6 polyunsaturated fatty acids (PUFAs) are essential fatty acids that are provided by dietary intake. Growing evidence suggests that n-3 and n-6 PUFAs are paramount for brain functions. They constitute crucial elements of cellular membranes, especially in the brain. They are the precursors of several metabolites with different effects on inflammation and neuron outgrowth. Overall, long-chain PUFAs accumulate in the offspring brain during the embryonic and post-natal periods. In this review, we discuss how they accumulate in the developing brain, considering the maternal dietary supply, the polymorphisms of genes involved in their metabolism, and the differences linked to gender. We also report the mechanisms linking their bioavailability in the developing brain, their transfer from the mother to the embryo through the placenta, and their role in brain development. In addition, data on the potential role of altered bioavailability of long-chain n-3 PUFAs in the etiologies of neurodevelopmental diseases, such as autism, attention deficit and hyperactivity disorder, and schizophrenia, are reviewed.
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Vijay A, Astbury S, Le Roy C, Spector TD, Valdes AM. The prebiotic effects of omega-3 fatty acid supplementation: A six-week randomised intervention trial. Gut Microbes 2021; 13:1-11. [PMID: 33382352 PMCID: PMC7781624 DOI: 10.1080/19490976.2020.1863133] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 11/24/2020] [Accepted: 12/04/2020] [Indexed: 02/04/2023] Open
Abstract
Prebiotics are compounds in food that benefit health via affecting the gut microbiome. Omega-3 fatty acids have been associated with differences in gut microbiome composition and are widely accepted to have health benefits, although recent large trials have been inconclusive. We carried out a 6-week dietary intervention comparing the effects of daily supplementation with 500 mg of omega-3 versus 20 g of a well-characterized prebiotic, inulin. Inulin supplementation resulted in large increases in Bifidobacterium and Lachnospiraceae. In contrast, omega-3 supplementation resulted in significant increases in Coprococcus spp. and Bacteroides spp, and significant decreases in the fatty-liver associated Collinsella spp. On the other hand, similar to the results with inulin supplementation which resulted in significant increases in butyrate, iso-valerate, and iso-butyrate (p < .004), omega-3 supplementation resulted in significant increases in iso-butyrate and isovalerate (p < .002) and nearly significant increases in butyrate (p < .053). Coprococcus, which was significantly increased post-supplementation with omega-3, was found to be positively associated with iso-butyric acid (Beta (SE) = 0.69 (0.02), P = 1.4 x 10-3) and negatively associated with triglyceride-rich lipoproteins such as VLDL (Beta (SE) = -0.381 (0.01), P = .001) and VLDL-TG (Beta (SE) = -0.372 (0.04), P = .001) after adjusting for confounders. Dietary omega-3 alters gut microbiome composition and some of its cardiovascular effects appear to be potentially mediated by its effect on gut microbial fermentation products indicating that it may be a prebiotic nutrient.
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Affiliation(s)
- Amrita Vijay
- Department of Twin Research and Genetic Epidemiology, King’s College London, London, UK
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK
| | - Stuart Astbury
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, UK
| | - Caroline Le Roy
- Department of Twin Research and Genetic Epidemiology, King’s College London, London, UK
| | - Tim D Spector
- Department of Twin Research and Genetic Epidemiology, King’s College London, London, UK
| | - Ana M Valdes
- Department of Twin Research and Genetic Epidemiology, King’s College London, London, UK
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, Nottingham, UK
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, UK
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Bacterial Metabolites of Human Gut Microbiota Correlating with Depression. Int J Mol Sci 2020; 21:ijms21239234. [PMID: 33287416 PMCID: PMC7730936 DOI: 10.3390/ijms21239234] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/23/2020] [Accepted: 12/02/2020] [Indexed: 02/06/2023] Open
Abstract
Depression is a global threat to mental health that affects around 264 million people worldwide. Despite the considerable evolution in our understanding of the pathophysiology of depression, no reliable biomarkers that have contributed to objective diagnoses and clinical therapy currently exist. The discovery of the microbiota-gut-brain axis induced scientists to study the role of gut microbiota (GM) in the pathogenesis of depression. Over the last decade, many of studies were conducted in this field. The productions of metabolites and compounds with neuroactive and immunomodulatory properties among mechanisms such as the mediating effects of the GM on the brain, have been identified. This comprehensive review was focused on low molecular weight compounds implicated in depression as potential products of the GM. The other possible mechanisms of GM involvement in depression were presented, as well as changes in the composition of the microbiota of patients with depression. In conclusion, the therapeutic potential of functional foods and psychobiotics in relieving depression were considered. The described biomarkers associated with GM could potentially enhance the diagnostic criteria for depressive disorders in clinical practice and represent a potential future diagnostic tool based on metagenomic technologies for assessing the development of depressive disorders.
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Jung M, Choi H, Kim J, Mun JY. Correlative Light and Transmission Electron Microscopy Showed Details of Mitophagy by Mitochondria Quality Control in Propionic Acid Treated SH-SY5Y Cell. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4336. [PMID: 33003589 PMCID: PMC7579125 DOI: 10.3390/ma13194336] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/25/2020] [Accepted: 09/27/2020] [Indexed: 01/21/2023]
Abstract
Propionic acid is a metabolite of the microbiome and can be transported to the brain. Previous data show that propionic acid changes mitochondrial biogenesis in SH-SY5Y cells and induces abnormal autophagy in primary hippocampal neurons. Maintaining mitochondrial function is key to homeostasis in neuronal cells, and mitophagy is the selective autophagy involved in regulating mitochondrial quality. Monitoring mitophagy though light microscopy or conventional transmission electron microscopy separately is insufficient because phases of mitophagy, including autophagosome and autolysosome in nano-resolution, are critical for studies of function. Therefore, we used correlative light and electron microscopy to investigate mitochondrial quality in SH-SY5Y cells after propionic acid treatment to use the advantages of both techniques. We showed, with this approach, that propionic acid induces mitophagy associated with mitochondrial quality.
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Affiliation(s)
- Minkyo Jung
- Neural Circuit Research Group, Korea Brain Research Institute, Daegu 41062, Korea; (M.J.); (H.C.)
| | - Hyosun Choi
- Neural Circuit Research Group, Korea Brain Research Institute, Daegu 41062, Korea; (M.J.); (H.C.)
- BK21 Plus Program, Department of Senior Healthcare, Graduate School, Eulji University, Daejeon 34824, Korea
| | - Jaekwang Kim
- Dementia Research Group, Korea Brain Research Institute, Daegu 41062, Korea;
| | - Ji Young Mun
- Neural Circuit Research Group, Korea Brain Research Institute, Daegu 41062, Korea; (M.J.); (H.C.)
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Carpita B, Marazziti D, Palego L, Giannaccini G, Betti L, Dell'Osso L. Microbiota, Immune System and Autism Spectrum Disorders: An Integrative Model towards Novel Treatment Options. Curr Med Chem 2020; 27:5119-5136. [PMID: 31448708 DOI: 10.2174/0929867326666190328151539] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Autism Spectrum Disorder (ASD) is a condition strongly associated with genetic predisposition and familial aggregation. Among ASD patients, different levels of symptoms severity are detectable, while the presence of intermediate autism phenotypes in close relatives of ASD probands is also known in literature. Recently, increasing attention has been paid to environmental factors that might play a role in modulating the relationship between genomic risk and development and severity of ASD. Within this framework, an increasing body of evidence has stressed a possible role of both gut microbiota and inflammation in the pathophysiology of neurodevelopment. The aim of this paper is to review findings about the link between microbiota dysbiosis, inflammation and ASD. METHODS Articles ranging from 1990 to 2018 were identified on PUBMED and Google Scholar databases, with keyword combinations as: microbiota, immune system, inflammation, ASD, autism, broad autism phenotype, adult. RESULTS Recent evidence suggests that microbiota alterations, immune system and neurodevelopment may be deeply intertwined, shaping each other during early life. However, results from both animal models and human samples are still heterogeneous, while few studies focused on adult patients and ASD intermediate phenotypes. CONCLUSION A better understanding of these pathways, within an integrative framework between central and peripheral systems, might not only shed more light on neural basis of ASD symptoms, clarifying brain pathophysiology, but it may also allow to develop new therapeutic strategies for these disorders, still poorly responsive to available treatments.
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Affiliation(s)
- Barbara Carpita
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Donatella Marazziti
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Lionella Palego
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Gino Giannaccini
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Laura Betti
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Liliana Dell'Osso
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
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Ristori MV, Quagliariello A, Reddel S, Ianiro G, Vicari S, Gasbarrini A, Putignani L. Autism, Gastrointestinal Symptoms and Modulation of Gut Microbiota by Nutritional Interventions. Nutrients 2019; 11:nu11112812. [PMID: 31752095 PMCID: PMC6893818 DOI: 10.3390/nu11112812] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/07/2019] [Accepted: 11/13/2019] [Indexed: 02/07/2023] Open
Abstract
Autism spectrum disorder (ASD) is a complex behavioral syndrome that is characterized by speech and language disorders, intellectual impairment, learning and motor dysfunctions. Several genetic and environmental factors are suspected to affect the ASD phenotype including air pollution, exposure to pesticides, maternal infections, inflammatory conditions, dietary factors or consumption of antibiotics during pregnancy. Many children with ASD shows abnormalities in gastrointestinal (GI) physiology, including increased intestinal permeability, overall microbiota alterations, and gut infection. Moreover, they are "picky eaters" and the existence of specific sensory patterns in ASD patients could represent one of the main aspects in hampering feeding. GI disorders are associated with an altered composition of the gut microbiota. Gut microbiome is able to communicate with brain activities through microbiota-derived signaling molecules, immune mediators, gut hormones as well as vagal and spinal afferent neurons. Since the diet induces changes in the intestinal microbiota and in the production of molecules, such as the SCFA, we wanted to investigate the role that nutritional intervention can have on GI microbiota composition and thus on its influence on behavior, GI symptoms and microbiota composition and report which are the beneficial effect on ASD conditions.
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Affiliation(s)
- Maria Vittoria Ristori
- Unit of Human Microbiome, Children’s Hospital and Research Institute “Bambino Gesù”, IRCCS, Piazza Sant’Onofrio 4, 00165 Rome, Italy; (M.V.R.); (A.Q.); (S.R.)
| | - Andrea Quagliariello
- Unit of Human Microbiome, Children’s Hospital and Research Institute “Bambino Gesù”, IRCCS, Piazza Sant’Onofrio 4, 00165 Rome, Italy; (M.V.R.); (A.Q.); (S.R.)
| | - Sofia Reddel
- Unit of Human Microbiome, Children’s Hospital and Research Institute “Bambino Gesù”, IRCCS, Piazza Sant’Onofrio 4, 00165 Rome, Italy; (M.V.R.); (A.Q.); (S.R.)
| | - Gianluca Ianiro
- Dipartimento di Gastroenterologia, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy;
| | - Stefano Vicari
- Neuropsichiatria dell’infanzia e dell’adolescenza, Children’s Hospital and Research Institute “Bambino Gesù”, IRCCS, Piazza Sant’Onofrio 4, 00165 Rome, Italy;
| | - Antonio Gasbarrini
- Istituto di Patologia Speciale Medica, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- UOC Medicina Interna e Gastroenterologia, Area Gastroenterologia ed Oncologia Medica, Dipartimento di Scienze Gastroenterologiche, Endocrino-Metaboliche e Nefro-Urologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
- Correspondence: (A.G.); (L.P.); Tel.: +39-0668-59-4127 (L.P.)
| | - Lorenza Putignani
- Units of Parasitology and Human Microbiome, Children’s Hospital and Research Institute “Bambino Gesù”, IRCCS, Piazza Sant’Onofrio 4, 00165 Rome, Italy
- Correspondence: (A.G.); (L.P.); Tel.: +39-0668-59-4127 (L.P.)
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11
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Zou M, Li D, Li L, Wu L, Sun C. Role of the endocannabinoid system in neurological disorders. Int J Dev Neurosci 2019; 76:95-102. [PMID: 30858029 DOI: 10.1016/j.ijdevneu.2019.03.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 01/13/2023] Open
Abstract
Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder that begins in infancy. Although the etiology and pathogenesis are poorly understood, many studies have shown that ASD is closely related to structural and functional defects in the nervous system, especially synaptic transmission. The endocannabinoid (eCB) system is an important regulatory system of the central nervous system that regulates neurotransmission and synaptic plasticity and plays an important role in emotional and social responses and cognitive function. The relationship between eCB system and ASD has attracted increasing attention from scholars. In this review, we discuss the complex lipid signaling network of the eCB system, intracellular transport pathways, abnormal expression and association with various neurological diseases, and direct and indirect evidence for the link between eCB and ASD. Collectively, the findings to date indicate that the eCB system plays a key role in the pathophysiology of ASD and can provide new insights into potential interventions and rehabilitation strategies for ASD.
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Affiliation(s)
- Mingyang Zou
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, 150081, China
| | - Dexin Li
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, 150081, China
| | - Ling Li
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, 150081, China
| | - Lijie Wu
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, 150081, China
| | - Caihong Sun
- Department of Children's and Adolescent Health, Public Health College, Harbin Medical University, Harbin, 150081, China
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12
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Dehhaghi M, Kazemi Shariat Panahi H, Guillemin GJ. Microorganisms' Footprint in Neurodegenerative Diseases. Front Cell Neurosci 2018; 12:466. [PMID: 30564101 PMCID: PMC6288487 DOI: 10.3389/fncel.2018.00466] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 11/16/2018] [Indexed: 01/08/2023] Open
Abstract
Advancement of science has gifted the human a longer life; however, as neuron cells do not regenerate, the number of people with neurodegeneration disorders rises with population aging. Neurodegeneration diseases occur as a result of neuronal cells loss caused by environmental factors, genetic mutations, proteopathies and other cellular dysfunctions. The negative direct or indirect contributions of various microorganisms in onset or severity of some neurodegeneration disorders and interaction between human immune system and pathogenic microorganisms has been portrayed in this review article. This association may explain the early onset of neurodegeneration disorders in some individuals, which can be traced through detailed study of health background of these individuals for infection with any microbial disease with neuropathogenic microorganisms (bacteria, fungi, viruses). A better understanding and recognition of the relation between microorganisms and neurodegeneration disorders may help researchers in development of novel remedies to avoid, postpone, or make neurodegeneration disorders less severe.
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Affiliation(s)
- Mona Dehhaghi
- Neuroinflammation Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia.,Department of Microbial Biotechnology, School of Biology and Centre of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
| | - Hamed Kazemi Shariat Panahi
- Neuroinflammation Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia.,Department of Microbial Biotechnology, School of Biology and Centre of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
| | - Gilles J Guillemin
- Neuroinflammation Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia
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13
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Diagnostic and Severity-Tracking Biomarkers for Autism Spectrum Disorder. J Mol Neurosci 2018; 66:492-511. [DOI: 10.1007/s12031-018-1192-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 09/25/2018] [Indexed: 01/06/2023]
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14
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Lv QQ, You C, Zou XB, Deng HZ. Acyl-carnitine, C5DC, and C26 as potential biomarkers for diagnosis of autism spectrum disorder in children. Psychiatry Res 2018; 267:277-280. [PMID: 29945069 DOI: 10.1016/j.psychres.2018.06.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 06/08/2018] [Accepted: 06/10/2018] [Indexed: 02/07/2023]
Abstract
Autism spectrum disorder (ASD) is a group of neurodevelopmental disorders that shown a close association with impaired lipid metabolism. The acyl-carnitine spectrum status in Chinese children with ASD has not been reported. In this study, we assessed the levels of blood acyl-carnitines in Chinese children with ASD and examined the relation between acyl-carnitine profiles and the intelligence levels. Blood levels of acyl-carnitines were determined by tandem mass spectrometry in 60 children with ASD and 30 typically developing children. Chinese Wechsler Young Children Scale of Intelligence (C-WYCSI) was used in ASD group. Blood levels of free carnitine, glutaricyl carnitine, octyl carnitine, twenty four carbonyl carnitine and carnosyl carnitine in the ASD group were significantly lower than those in the control group. Glutaryl carnitine and carnosyl carnitine might be potential biomarkers for diagnosis of ASD. The changes in the acyl-carnitine spectrum indicate potential mitochondrial dysfunction and abnormal fatty acid metabolism in preschool ASD children.
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Affiliation(s)
- Qian-Qian Lv
- Child Developmental & Behavioral Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China; Department of Pediatrics, People's Hospital of Rizhao, Rizhao 276826, China
| | - Cong You
- Child Developmental & Behavioral Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Xiao-Bing Zou
- Child Developmental & Behavioral Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Hong-Zhu Deng
- Child Developmental & Behavioral Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
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15
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Tengeler AC, Kozicz T, Kiliaan AJ. Relationship between diet, the gut microbiota, and brain function. Nutr Rev 2018; 76:603-617. [DOI: 10.1093/nutrit/nuy016] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Anouk C Tengeler
- Department of Anatomy, Radboud university medical center, Center for Medical Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Preclinical Imaging Center PRIME, Nijmegen, the Netherlands
| | - Tamas Kozicz
- Department of Anatomy, Radboud university medical center, Center for Medical Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Preclinical Imaging Center PRIME, Nijmegen, the Netherlands
- Department of Pedriatrics, Hayward Genetics Center, Tulane University School of Medicine, Tulane University, New Orleans, Louisiana, USA
| | - Amanda J Kiliaan
- Department of Anatomy, Radboud university medical center, Center for Medical Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Preclinical Imaging Center PRIME, Nijmegen, the Netherlands
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16
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El-Ansary A, Bjørklund G, Tinkov AA, Skalny AV, Al Dera H. Relationship between selenium, lead, and mercury in red blood cells of Saudi autistic children. Metab Brain Dis 2017; 32:1073-1080. [PMID: 28326463 DOI: 10.1007/s11011-017-9996-1] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 03/15/2017] [Indexed: 12/22/2022]
Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental disorder that can cause significant social, communication and behavioral challenges. Environmental contribution to ASD is due in large part to the sensitivity of the developing brain to external exposures such as lead (Pb), and mercury (Hg) as toxic heavy metals or due to a poor detoxification ability as the phenotype of this disorder. Selenium (Se) as an antioxidant element that counteracts the neurotoxicity of Hg, and Pb, presumably through the formation of nontoxic complexes. In the present study, Pb, Hg, and Se were measured in red blood cells (RBCs) of 35 children with ASD and 30 age- and gender-matched healthy control children using atomic absorption spectrometry. Receiver Operating Characteristics (ROC) analysis of the obtained data was performed to measure the predictive value of their absolute and relative concentrations. The obtained data demonstrates a significant elevation of Hg and Pb together with a significant decrease in the Se levels in RBCs of patients with ASD when compared to the healthy controls. The ratios of Se to both Pb and Hg were remarkably altered, being indicative of heavy metal neurotoxicity in patients with ASD. In conclusion, the present study indicates the importance of Se for prevention and/or therapy of heavy metal neurotoxicity.
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Affiliation(s)
- Afaf El-Ansary
- Central Laboratory, Center for Female Scientific and Medical Colleges, King Saud University, Riyadh, Saudi Arabia
- Autism Research and Treatment Center, Riyadh, Saudi Arabia
- Medicinal Chemistry Department, National Research Centre, Dokki, Cairo, Egypt
| | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Toften 24, 8610, Mo i Rana, Norway.
| | - Alexey A Tinkov
- Orenburg State University, Orenburg, Russia
- Orenburg State Medical University, Orenburg, Russia
- Yaroslavl State University, Yaroslavl, Russia
| | - Anatoly V Skalny
- Orenburg State Medical University, Orenburg, Russia
- Yaroslavl State University, Yaroslavl, Russia
- RUDN University, Moscow, Russia
- All-Russian Research Institute of Medicinal and Aromatic Plants, Moscow, Russia
| | - Hussain Al Dera
- Basic Medical Science Department, College of Medicine, King Saud bin Abdul Aziz University for Health Sciences, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center (KAIMRC), Riyadh, Saudi Arabia
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17
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Mechanism of development of depression and probiotics as adjuvant therapy for its prevention and management. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.mhp.2017.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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18
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Fortunato JJ, da Rosa N, Martins Laurentino AO, Goulart M, Michalak C, Borges LP, da Cruz Cittadin Soares E, Reis PA, de Castro Faria Neto HC, Petronilho F. Effects of ω-3 fatty acids on stereotypical behavior and social interactions in Wistar rats prenatally exposed to lipopolysaccarides. Nutrition 2017; 35:119-127. [DOI: 10.1016/j.nut.2016.10.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 10/21/2016] [Accepted: 10/29/2016] [Indexed: 02/07/2023]
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19
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Berding K, Donovan SM. Microbiome and nutrition in autism spectrum disorder: current knowledge and research needs. Nutr Rev 2016; 74:723-736. [DOI: 10.1093/nutrit/nuw048] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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20
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Peng M, Biswas D. Short chain and polyunsaturated fatty acids in host gut health and foodborne bacterial pathogen inhibition. Crit Rev Food Sci Nutr 2016; 57:3987-4002. [DOI: 10.1080/10408398.2016.1203286] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Mengfei Peng
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, USA
- Biological Sciences Program Molecular and Cellular Biology Concentration, University of Maryland, College Park, Maryland, USA
| | - Debabrata Biswas
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, USA
- Biological Sciences Program Molecular and Cellular Biology Concentration, University of Maryland, College Park, Maryland, USA
- Center for Food Safety and Security Systems, University of Maryland, College Park, Maryland, USA
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21
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Li Q, Zhou JM. The microbiota-gut-brain axis and its potential therapeutic role in autism spectrum disorder. Neuroscience 2016; 324:131-9. [PMID: 26964681 DOI: 10.1016/j.neuroscience.2016.03.013] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Revised: 02/04/2016] [Accepted: 03/03/2016] [Indexed: 02/06/2023]
Abstract
Autism spectrum disorder (ASD) is a series of neurodevelopmental disorders that are characterized by deficits in both social and cognitive functions. Although the exact etiology and pathology of ASD remain unclear, a disorder of the microbiota-gut-brain axis is emerging as a prominent factor in the generation of autistic behaviors. Clinical studies have shown that gastrointestinal symptoms and compositional changes in the gut microbiota frequently accompany cerebral disorders in patients with ASD. A disturbance in the gut microbiota, which is usually induced by a bacterial infection or chronic antibiotic exposure, has been implicated as a potential contributor to ASD. The bidirectional microbiota-gut-brain axis acts mainly through neuroendocrine, neuroimmune, and autonomic nervous mechanisms. Application of modulators of the microbiota-gut-brain axis, such as probiotics, helminthes and certain special diets, may be a promising strategy for the treatment of ASD. This review mainly discusses the salient observations of the disruptions of the microbiota-gut-brain axis in the pathogenesis of ASD and reveals its potential therapeutic role in autistic deficits.
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Affiliation(s)
- Q Li
- Department of Central Laboratory, Shanghai Children's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - J-M Zhou
- Department of Central Laboratory, Shanghai Children's Hospital, Shanghai Jiaotong University, Shanghai, China.
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22
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El-Ansary A, Al-Ghamdi M, Bhat RS, Al-Daihan S, Al-Ayadhi L. Potency of pre-post treatment of coenzyme Q10 and melatonin supplement in ameliorating the impaired fatty acid profile in rodent model of autism. Food Nutr Res 2016; 60:28127. [PMID: 26945230 PMCID: PMC4779327 DOI: 10.3402/fnr.v60.28127] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 01/16/2016] [Accepted: 02/10/2016] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Abnormalities in fatty acid metabolism and membrane fatty acid composition play a part in a wide range of neurodevelopmental and psychiatric disorders. Altered fatty acid homeostasis as a result of insufficient dietary supplementation, genetic defects, the function of enzymes involved in their metabolism, or mitochondrial dysfunction contributes to the development of autism. OBJECTIVE This study evaluates the association of altered brain lipid composition and neurotoxicity related to autism spectrum disorders in propionic acid (PA)-treated rats. DESIGN Forty-eight young male western albino rats were used in this study. They were grouped into six equal groups with eight rats in each. The first group received only phosphate buffered saline (control group). The second group received a neurotoxic dose of buffered PA (250 mg/kg body weight/day for 3 consecutive days). The third and fourth groups were intoxicated with PA as described above followed by treatment with either coenzyme Q (4.5 mg/kg body weight) or melatonin (10 mg/kg body weight) for 1 week (therapeutically treated groups). The fifth and sixth groups were administered both compounds for 1 week prior to PA (protected groups). Methyl esters of fatty acid were extracted with hexane, and the fatty acid composition of the extract was analyzed on a gas chromatography. RESULTS The obtained data proved that fatty acids are altered in brain tissue of PA-treated rats. All saturated fatty acids were increased while all unsaturated fatty acids were significantly decreased in the PA-treated group and relatively ameliorated in the pre-post melatonin and coenzyme Q groups. CONCLUSIONS Melatonin and coenzyme Q were effective in restoring normal level of most of the impaired fatty acids in PA-intoxicated rats which could help suggest both as supplements to ameliorate the autistic features induced in rat pups.
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Affiliation(s)
- Afaf El-Ansary
- Autism Research and Treatment Center, Riyadh, Saudi Arabia
- Shaik AL-Amodi Autism Research Chair, King Saud University, Riyadh, Saudi Arabia
- Biochemistry Department, Science College, King Saud University, Riyadh, Saudi Arabia
| | - Mashael Al-Ghamdi
- Biochemistry Department, Science College, King Saud University, Riyadh, Saudi Arabia
| | - Ramesa Shafi Bhat
- Biochemistry Department, Science College, King Saud University, Riyadh, Saudi Arabia; ;
| | - Sooad Al-Daihan
- Biochemistry Department, Science College, King Saud University, Riyadh, Saudi Arabia
| | - Laila Al-Ayadhi
- Autism Research and Treatment Center, Riyadh, Saudi Arabia
- Shaik AL-Amodi Autism Research Chair, King Saud University, Riyadh, Saudi Arabia
- Department of Physiology, Faculty of Medicine, King Saud University, Riyadh, Saudi Arabia
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23
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Shan L, Hu XL, Wang B, Jia FY. [Research advances in the role of vitamin D in autism spectrum disorders]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2016; 18:183-8. [PMID: 26903068 PMCID: PMC7403048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 12/10/2015] [Indexed: 03/30/2024]
Abstract
The etiology and pathogenic mechanism of autism spectrum disorders (ASD) are still unclear. The relationship between vitamin D and ASD has drawn attention in recent years due to common vitamin D deficiency in children with ASD. This article reviews the peripheral blood levels of vitamin D in children with ASD, the possible reasons for hypovitamin D and its possible roles in the etiology of ASD and the efficacy of vitamin D supplementation in ASD.
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Affiliation(s)
- Ling Shan
- Department of Pediatric Neurology and Rehabilitation, First Hospital of Jilin University, Changchun 130021, China.
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24
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Shan L, Hu XL, Wang B, Jia FY. [Research advances in the role of vitamin D in autism spectrum disorders]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2016; 18:183-188. [PMID: 26903068 PMCID: PMC7403048 DOI: 10.7499/j.issn.1008-8830.2016.02.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 12/10/2015] [Indexed: 06/05/2023]
Abstract
The etiology and pathogenic mechanism of autism spectrum disorders (ASD) are still unclear. The relationship between vitamin D and ASD has drawn attention in recent years due to common vitamin D deficiency in children with ASD. This article reviews the peripheral blood levels of vitamin D in children with ASD, the possible reasons for hypovitamin D and its possible roles in the etiology of ASD and the efficacy of vitamin D supplementation in ASD.
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Affiliation(s)
- Ling Shan
- Department of Pediatric Neurology and Rehabilitation, First Hospital of Jilin University, Changchun 130021, China.
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25
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Jory J. Abnormal fatty acids in Canadian children with autism. Nutrition 2015; 32:474-7. [PMID: 26746679 DOI: 10.1016/j.nut.2015.10.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/31/2015] [Accepted: 10/31/2015] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Fatty acids are critical for pediatric neurodevelopment and are abnormal in autism, although prior studies have demonstrated conflicting results and methodological differences. To our knowledge, there are no published data on fatty acid in Canadian children with autism. The aim of this study was to investigate red blood cell and serum fatty acid status to identify whether abnormalities exist in Canadian children with autism, and to enhance future cross-study comparison. METHODS Eleven Canadian children with autism (3 girls, 8 boys; age 3.05 ± 0.79 y) and 15 controls (9 girls, 6 boys; age 3.87 ± 1.06 y) met inclusion criteria, which included prior Diagnostic and Statistical Manual diagnosis of autism spectrum disorder, no recent medication or supplements, no specialty diets, and no recent illness. RESULTS The children with autism demonstrated lower red blood cell docosahexaenoic acid (P < 0.0003), eicosapentaenoic acid (P < 0.03), arachidonic acid (P < 0.002), and ω-3/ω-6 ratios (P < 0.001). They also demonstrated lower serum docosahexaenoic acid (P < 0.02), arachidonic acid (P < 0.05), and linoleic acid (P < 0.02) levels. CONCLUSIONS Fatty acids in both serum and red blood cells were abnormal in this small group of Canadian children with autism than in controls, underlining a need for larger age- and sex-matched investigations in this community. A potential role for fatty acid abnormalities within the complex epigenetic etiology of autism is proposed in relation to emerging understanding of relationships between cobalamin metabolism, gut microbiota, and propionic acid production.
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