scholarly journals Critical review on role of Microbiota transfer therapy in Autism spectrum disorder

2021 ◽  
Vol 12 (3) ◽  
pp. 2095-2114
Author(s):  
Hemalakshmi R ◽  
Pavithra Amritkumar
Keyword(s):  
Autism Spectrum Disorder ◽  
Gut Microbiota ◽  
Developmental Disorders ◽  
Treatment Options ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Intestinal Microbiome ◽  
The Brain

Autism spectrum disorder (ASD) is a developmental disorder that affects behaviour and communication. It can be diagnosed at any age, although the symptoms generally appear in the first two years of life. Autism is also known as a "spectrum" disorder because there is wide variation in the severity and type of patient experience. Intestinal dysbiosis remains a risk factor for several neuron-developmental disorders and physiological diseases such as ASD. The gut microbiome in human influence the total metabolomic profile and thus has an impact on the overall health of human. The brain-intestinal axis concept demonstrates the interaction between the brain and the diverse gut microbial population. Recent findings show that ASD symptoms in affected individuals are linked with the altered intestinal microbiome. The current treatment modality for the symptoms of ASD are limited to Applied Behaviour Analysis (ABA) and FDA approved medications like Risperidone and Aripiprazole. Individuals with ASD appear to be susceptible to adverse effects of these medications. Current accumulating studies indicate that Microbiota Transfer Therapy (MTT) is a promising technique for treating ASD. MTT involves in vitro batch culture of gut microbiota, which is viewed as a quick and accessible method. It has provided encouraging results by improving ASD-related gastrointestinal (GI) and behavioural symptoms in affected individuals. The present review focuses on the link between gut dysbiosis and ASD, analyses the available clinical studies related to various treatment options and describes the role of MTT as a promising therapy of bringing back the healthy gut microbiota composition in treating ASD.

scholarly journals Beyond a gut feeling: How the immune system impacts the effect of gut microbiota in neurodevelopment

2019 ◽  
Vol 42 ◽  
Author(s):  
Atiqah Azhari ◽  
Farouq Azizan ◽  
Gianluca Esposito
Keyword(s):  
Autism Spectrum Disorder ◽  
Immune System ◽  
Gut Microbiota ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Microbial Dysbiosis ◽  
Inflammatory State ◽  
Gastrointestinal Microbes ◽  
The Brain

Abstract Hooks et al. posit that gastrointestinal microbes alter the end state of development indirectly. Here, we present the immune system as the link that facilitates communication between the gut and the brain. Illustrating the case of autism spectrum disorder, we explicate the role of the immune system in responding to microbial dysbiosis by inducing an inflammatory state that affects neurodevelopment. We propose two models: directly, within the infant, and indirectly, via maternal and infant systems.

scholarly journals Autism Spectrum Disorder and the Gut Microbiota in Children: A Systematic Review

2020 ◽  
Vol 76 (1) ◽  
pp. 16-29 ◽  
Author(s):  
Navya Bezawada ◽  
Tze Hui Phang ◽  
Georgina L. Hold ◽  
Richard Hansen
Keyword(s):  
Autism Spectrum Disorder ◽  
Gut Microbiota ◽  
Meta Analysis ◽  
Gastrointestinal Symptoms ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Extensive Literature ◽  
Faecal Samples ◽  
Extensive Literature Search

Introduction: Differences in microbiota composition in children with autism spectrum disorder (ASD) compared to unaffected siblings and healthy controls have been reported in various studies. This study aims to systematically review the existing literature concerning the role of the gut microbiota in ASD. Methods: An extensive literature search was conducted using MEDLINE and EMBASE databases to identify studies (January 1966 through July 2019). Results: A total of 28 papers were included. The studies ranged from 12 to 104 participants who were aged between 2 and 18 years from various geographical areas. Majority of studies included faecal samples; however, 4 studies examined mucosal biopsies from different sites. The heterogeneity in ASD diagnostic methodology, gut site sampled and laboratory methods used made meta-analysis inappropriate. Species reported to be significantly higher in abundance in autistic children included Clostridium, Sutterella, Desulfovibrio and Lactobacillus. The findings are however inconsistent across studies. In addition, ­potential confounding effects of antimicrobial use, gastrointestinal symptoms and diet on the gut microbiota are unclear due to generally poor assessment of these factors. Conclusion: It is clear that the gut microbiota is altered in ASD, although further exploration is needed on whether this is a cause or an effect of the condition.

scholarly journals Pathogenetical and Neurophysiological Features of Patients with Autism Spectrum Disorder: Phenomena and Diagnoses

2019 ◽  
Vol 8 (10) ◽  
pp. 1588
Author(s):  
Yunho Jin ◽  
Jeonghyun Choi ◽  
Seunghoon Lee ◽  
Jong Won Kim ◽  
Yonggeun Hong
Keyword(s):  
Autism Spectrum Disorder ◽  
Neural Development ◽  
Neurodevelopmental Disorder ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Social Deficits ◽  
Restricted Interests ◽  
Neuropsychiatric Comorbidities ◽  
The Brain

Autism spectrum disorder (ASD) is a neurodevelopmental disorder that is accompanied by social deficits, repetitive and restricted interests, and altered brain development. The majority of ASD patients suffer not only from ASD itself but also from its neuropsychiatric comorbidities. Alterations in brain structure, synaptic development, and misregulation of neuroinflammation are considered risk factors for ASD and neuropsychiatric comorbidities. Electroencephalography has been developed to quantitatively explore effects of these neuronal changes of the brain in ASD. The pineal neurohormone melatonin is able to contribute to neural development. Also, this hormone has an inflammation-regulatory role and acts as a circadian key regulator to normalize sleep. These functions of melatonin may play crucial roles in the alleviation of ASD and its neuropsychiatric comorbidities. In this context, this article focuses on the presumable role of melatonin and suggests that this hormone could be a therapeutic agent for ASD and its related neuropsychiatric disorders.

scholarly journals The Brain-Gut-Microbiome System: Pathways and Implications for Autism Spectrum Disorder

Nutrients ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 4497
Author(s):  
Michelle A. Chernikova ◽  
Genesis D. Flores ◽  
Emily Kilroy ◽  
Jennifer S. Labus ◽  
Emeran A. Mayer ◽  
...  
Keyword(s):  
Autism Spectrum Disorder ◽  
Gut Microbiota ◽  
Gut Microbiome ◽  
Fecal Microbiota Transplantation ◽  
Fecal Microbiota ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Preclinical Research ◽  
Gastrointestinal Problems ◽  
The Brain

Gastrointestinal dysfunction is one of the most prevalent physiological symptoms of autism spectrum disorder (ASD). A growing body of largely preclinical research suggests that dysbiotic gut microbiota may modulate brain function and social behavior, yet little is known about the mechanisms that underlie these relationships and how they may influence the pathogenesis or severity of ASD. While various genetic and environmental risk factors have been implicated in ASD, this review aims to provide an overview of studies elucidating the mechanisms by which gut microbiota, associated metabolites, and the brain interact to influence behavior and ASD development, in at least a subgroup of individuals with gastrointestinal problems. Specifically, we review the brain-gut-microbiome system and discuss findings from current animal and human studies as they relate to social-behavioral and neurological impairments in ASD, microbiota-targeted therapies (i.e., probiotics, fecal microbiota transplantation) in ASD, and how microbiota may influence the brain at molecular, structural, and functional levels, with a particular interest in social and emotion-related brain networks. A deeper understanding of microbiome-brain-behavior interactions has the potential to inform new therapies aimed at modulating this system and alleviating both behavioral and physiological symptomatology in individuals with ASD.

scholarly journals The role of genetic research in autism treatment Phelan-McDermid syndrome: Sasha’s story

2016 ◽  
Vol 14 (2) ◽  
pp. 13-19
Author(s):  
N.V. Solovyeva ◽  
N.S. Kitsul
Keyword(s):  
Autism Spectrum Disorder ◽  
Genetic Research ◽  
Genetic Diagnosis ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Autism Treatment ◽  
The Brain

Different syndromes hide under the mask of autism. Each is caused by a certain genetic fault disturbing the development of the brain and leading to symptoms of autism showing. A correctly done genetic diagnosis helps to avoid mistakes when choosing a way of treatment. The focus of this article is Phelan-McDermid Syndrome, an autism spectrum disorder. The clinical example provided is Sasha’s story: how his treatment changed after specifying the diagnosis.

Role of Vitamin D in Autism Spectrum Disorder

2020 ◽  
Vol 25 (41) ◽  
pp. 4357-4367 ◽  
Author(s):  
Loai Alzghoul
Keyword(s):  
Autism Spectrum Disorder ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Autism Spectrum ◽  
Vitamin D Supplementation ◽  
Spectrum Disorder ◽  
Vitamin D Levels

: Autism spectrum disorder (ASD) is a pervasive developmental disorder with heterogeneous etiology. Vitamin D can function as a fat-soluble vitamin as well as a hormone, and can exert its effect through both genomic and non-genomic mechanisms. In the last decades, several studies have examined the relationship between vitamin D levels and ASD. These studies demonstrated that low vitamin D status in early development has been hypothesized as an environmental risk factor for ASD. Both in vivo and in vitro studies have demonstrated that vitamin D deficiency in early life can alter brain development, dysregulates neurotransmitter balance in the brain, decreases body and brain antioxidant ability, and alters the immune system in ways that resemble pathological features commonly seen in ASD. In this review, we focused on the association between vitamin D and ASD. In addition, the above-mentioned mechanisms of action that link vitamin D deficiency with ASD were also discussed. Finally, clinical trials of vitamin D supplementation treatment of ASD have also been discussed.

scholarly journals Reasoning through the Gut: The Microbiota-Gut-Brain Axis and its Role in the Pathogenesis of Autism Spectrum Disorder

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Shreyas Singh ◽  
Avan Erhunmwunsee Dalton
Keyword(s):  
Autism Spectrum Disorder ◽  
Behavioral Therapy ◽  
Treatment Options ◽  
The United States ◽  
Scientific Basis ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Psychological Conditions ◽  
Core Symptoms

The age-old phrase ‘gut feeling’ is increasingly finding a scientific basis. The human gut houses a massive colony of microorganisms that not only maintain intestinal function, but also have far-reaching connections to the brain through a complicated ‘microbiota-gut-brain’ (MGB) axis. This axis has now been established to have implications in the management of various neuro-psychological conditions including Autism spectrum disorder (ASD), a condition that affects the way people communicate, behave and interact with others. Once considered a rare disorder, it is now estimated to have a prevalence of about 1 in 54 children in the United States. It is unfortunate that the existing cognitive-behavioral therapy protocols for ASD are prolonged and expensive, and that there is no currently approved medication for the core symptoms of the disorder. Scientists are now exploring the MGB axis for establishing possible therapeutic targets to alleviate the symptoms of ASD. This review attempts to highlight how the MGB axis works, and to capture the essence of the mechanisms that implicate the MGB axis in the pathogenesis of ASD. Further research in this direction may convincingly establish the role of novel treatment options for ASD ranging from probiotics and dietary modifications to newer modalities like fecal transplants, vagal nerve stimulation and gene therapy. Microbes, and not just behavioral intervention therapy, may hold the key to treating ASD.   

scholarly journals Role of the Gut Microbiota in the Pathophysiology of Autism Spectrum Disorder: Clinical and Preclinical Evidence

2020 ◽  
Vol 8 (9) ◽  
pp. 1369 ◽  
Author(s):  
Léa Roussin ◽  
Naika Prince ◽  
Paula Perez-Pardo ◽  
Aletta D. Kraneveld ◽  
Sylvie Rabot ◽  
...  
Keyword(s):  
Autism Spectrum Disorder ◽  
Gut Microbiota ◽  
Clinical Studies ◽  
Neurodevelopmental Disorder ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Preclinical Studies ◽  
Potential Implication ◽  
Gi Symptoms

Autism spectrum disorder (ASD) is a neurodevelopmental disorder affecting 1 in 160 people in the world. Although there is a strong genetic heritability to ASD, it is now accepted that environmental factors can play a role in its onset. As the prevalence of gastrointestinal (GI) symptoms is four-times higher in ASD patients, the potential implication of the gut microbiota in this disorder is being increasingly studied. A disturbed microbiota composition has been demonstrated in ASD patients, accompanied by altered production of bacterial metabolites. Clinical studies as well as preclinical studies conducted in rodents have started to investigate the physiological functions that gut microbiota might disturb and thus underlie the pathophysiology of ASD. The first data support an involvement of the immune system and tryptophan metabolism, both in the gut and central nervous system. In addition, a few clinical studies and a larger number of preclinical studies found that modulation of the microbiota through antibiotic and probiotic treatments, or fecal microbiota transplantation, could improve behavior. Although the understanding of the role of the gut microbiota in the physiopathology of ASD is only in its early stages, the data gathered in this review highlight that this role should be taken in consideration.

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