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Autism intestine

Góra Bartłomiej, Gofron Zygmunt, Grosiak Magdalena, Aptekorz Małgorzata, Kazek Beata, Kocelak Piotr, Radosz-Komoniewska Halina, Chudek Jerzy, Martirosian Gayane
Infectious factors are taken into consideration in pathophysiology of autism spectrum disorders (ASD). ASD patients often suffer from gastrointestinal disorders. The intestinal microbiota of autistic patients significantly differs from that in healthy individuals. The aim of the study was to compare the profile of toxins produced by C. perfringens strains isolated from feces of children with ASD, with healthy individuals and obese subjects. This study included 111 strains of C. perfringens: 49 isolates from 29 children with ASD, 30 - from 17 healthy individuals and 32 - from 24 young obese subjects...
March 8, 2018: Anaerobe
Peter Good
Because certain hereditary diseases show autistic behavior, and autism often runs in families, researchers seek genes underlying the pathophysiology of autism, thus core behaviors. Other researchers argue environmental factors are decisive, citing compelling evidence of an autism epidemic in the United States beginning about 1980. Recognition that environmental factors influence gene expression led to synthesis of these views - an 'epigenetic epidemic' provoked by pervasive environmental agents altering expression of vulnerable genes, inducing characteristic autistic biochemistries in many mothers and infants...
February 2018: Clinical Nutrition ESPEN
Ceymi Doenyas
Recent evidence implicates immune alterations and gut microbiota dysbiosis in at least some subpopulations of individuals with autism spectrum disorder (ASD). Immune and gut alterations in ASD have mostly been studied separately, and the reviews and theoretical models up to now have mainly considered the immune system as one of the routes for gut-brain communication. We take a different perspective and consider possible common mechanisms of action for the gut microbiota and inflammation on the neural basis of ASD...
February 7, 2018: Neuroscience
Brittany D Needham, Weiyi Tang, Wei-Li Wu
Social impairment is one of the major symptoms in multiple psychiatric disorders, including autism spectrum disorder (ASD). Accumulated studies indicate a crucial role for the gut microbiota in social development, but these mechanisms remain unclear. This review focuses on two strategies adopted to elucidate the complicated relationship between gut bacteria and host social behavior. In a top-down approach, researchers have attempted to correlate behavioral abnormalities with altered gut microbial profiles in rodent models of ASD, including BTBR mice, maternal immune activation (MIA), maternal valproic acid (VPA) and maternal high-fat diet (MHFD) offspring...
February 7, 2018: Developmental Neurobiology
K Babinská, A Tomova, H Celušáková, J Babková, G Repiská, A Kubranská, D Filčíková, L Siklenková, D Ostatníková
Autism spectrum disorders (ASD) are neurodevelopmental disorders characterized by impaired social interaction and communication, as well as repetitive behavior and restricted interests. There is convincing evidence that the intestinal inflammation is involved in etiology of ASD. Increased levels of inflammatory markers were shown to be associated with more aberrant behaviors and communication of subjects with ASD. Calprotectin in the feces is produced by activated neutrophils and epithelial cells of the gut mucosa, and its levels reflect local inflammation of the gastrointestinal tract...
December 30, 2017: Physiological Research
Laura M Cox, Howard L Weiner
Though seemingly distinct and autonomous, emerging evidence suggests there is a bidirectional interaction between the intestinal microbiota and the brain. This crosstalk may play a substantial role in neurologic diseases, including anxiety, depression, autism, multiple sclerosis, Parkinson's disease, and, potentially, Alzheimer's disease. Long hypothesized by Metchnikoff and others well over 100 years ago, investigations into the mind-microbe axis is now seeing a rapid resurgence of research. If specific pathways and mechanisms of interaction are understood, it could have broad therapeutic potential, as the microbiome is environmentally acquired and can be modified to promote health...
January 16, 2018: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
Christopher Staley, Alexander Khoruts, Michael J Sadowsky
The intestinal microbiota comprise an important organ that plays a vital role in host digestion, development, energy maintenance, hemostasis, and immunity. Disruption of the gut microbial community due to diet, lifestyle, or antibiotic exposure increases susceptibility to chronic infection and disease. Fecal microbiota transplantation (FMT) involves the transfer of gut microbiota from a healthy donor to a patient in order to restore normal diversity and function of the microbial community. This method has become a well established alternative therapy for the treatment of recurrent Clostridium difficile infection...
November 25, 2017: Archives of Medical Research
P C Barko, M A McMichael, K S Swanson, D A Williams
The gastrointestinal microbiome is a diverse consortium of bacteria, archaea, fungi, protozoa, and viruses that inhabit the gut of all mammals. Studies in humans and other mammals have implicated the microbiome in a range of physiologic processes that are vital to host health including energy homeostasis, metabolism, gut epithelial health, immunologic activity, and neurobehavioral development. The microbial genome confers metabolic capabilities exceeding those of the host organism alone, making the gut microbiome an active participant in host physiology...
January 2018: Journal of Veterinary Internal Medicine
Emily R Sekera, Heather L Rudolph, Stephen D Carro, Michael J Morales, Glenna C L Bett, Randall L Rasmusson, Troy D Wood
Introduction: Autism spectrum disorders (ASD) are a group of neurodevelopmental disorders lacking a clinical biomarker for diagnosis. Emerging evidence shows that intestinal microflora from ASD subjects can be distinguished from controls, suggesting metabolite differences due to the action of intestinal microbes may provide a means for identifying potential biomarkers for ASD. Objectives: The aim of this study was to determine if quantitative differences in levels of stercobilin and stercobilinogen, metabolites produced by biological action of intestinal microflora, exist in the fecal matter between an ASD mouse model population and controls...
November 2017: Metabolomics: Official Journal of the Metabolomic Society
Jiaxiu Zhou, Fusheng He, Feng Yang, Zheng Yang, Yingjun Xie, Shaoming Zhou, Jingwen Liang, Ruihuan Xu, Yan Wang, Hailiang Guo, Wenhao Zhou, Mingbang Wang
BACKGROUND: There are currently no effective treatments for the core symptoms of autism spectrum disorders (ASDs). However, alleviating gastrointestinal (GI) problems, which are prevalent in ASD patients, can significantly improve the core symptoms of autism. Previous studies have associated GI disorders in ASD patients with abnormal gut microbiota, although few disease-related microorganisms have been identified. Considering that the gut microbiome affects the intestinal immune system and the patient's behavior, and that immunoglobulin A (IgA) is the main antibody secreted by intestinal immune cells, we investigated stool IgA content as a means of understanding the gut immune status of ASD patients...
October 25, 2017: Research in Developmental Disabilities
Alex Vasquez
Organic abnormalities with neuroinflammatory and psychiatric consequences involving abnormal kynurenine and purine metabolism, neurotransmitter and cytokine imbalances, and altered levels of nutrients and metabolites are noted in autism, and many of these abnormalities-specifically including increased intestinal permeability, microbial metabolites, and heightened serum levels of endotoxin-originate from the gut.
November 1, 2017: Annals of the New York Academy of Sciences
Jan Józefczuk, Ewa Konopka, Joanna Beata Bierła, Ilona Trojanowska, Agnieszka Sowińska, Rafał Czarnecki, Lucjan Sobol, Paweł Józefczuk, Weronika Surdy, Bożena Cukrowska
There is evidence that children with autism spectrum disorders (ASDs) display an increased immune reactivity against gluten, which is supposed to be the effect of intestinal barrier abnormalities. The aim of study was to evaluate the relation of antibody induced by gluten to zonulin and intestinal fatty acid binding proteins (I-FABP), that is, serological markers of an impaired gut barrier. The study included 77 patients with ASDs. Zonulin, I-FABP, celiac-specific antibodies, anti-gliadin antibodies (AGA), and antibodies against neural transglutaminase 6 (TG6) of immunoglobulin (Ig) A and IgG classes were detected in sera...
October 26, 2017: Journal of Medicinal Food
Wei-Li Wu
No abstract text is available yet for this article.
November 2017: EBioMedicine
Aaron Lerner, Sandra Neidhöfer, Torsten Matthias
Objectives: To comprehensively review the scientific knowledge on the gut-brain axis. Methods: Various publications on the gut-brain axis, until 31 July 2017, were screened using the Medline, Google, and Cochrane Library databases. The search was performed using the following keywords: "gut-brain axis", "gut-microbiota-brain axis", "nutrition microbiome/microbiota", "enteric nervous system", "enteric glial cells/network", "gut-brain pathways", "microbiome immune system", "microbiome neuroendocrine system" and "intestinal/gut/enteric neuropeptides"...
October 12, 2017: Microorganisms
Anna V Golubeva, Susan A Joyce, Gerard Moloney, Aurelijus Burokas, Eoin Sherwin, Silvia Arboleya, Ian Flynn, Dmitry Khochanskiy, Angela Moya-Pérez, Veronica Peterson, Kieran Rea, Kiera Murphy, Olga Makarova, Sergey Buravkov, Niall P Hyland, Catherine Stanton, Gerard Clarke, Cormac G M Gahan, Timothy G Dinan, John F Cryan
Autism spectrum disorder (ASD) is one of the most prevalent neurodevelopmental conditions worldwide. There is growing awareness that ASD is highly comorbid with gastrointestinal distress and altered intestinal microbiome, and that host-microbiome interactions may contribute to the disease symptoms. However, the paucity of knowledge on gut-brain axis signaling in autism constitutes an obstacle to the development of precision microbiota-based therapeutics in ASD. To this end, we explored the interactions between intestinal microbiota, gut physiology and social behavior in a BTBR T+Itpr3tf/J mouse model of ASD...
October 2017: EBioMedicine
Shu-Chen Wei, Hsin-Fang Yang-Yen, Po-Nien Tsao, Meng-Tzu Weng, Chien-Chih Tung, Linda C H Yu, Liang-Chuan Lai, Jen-Hao Hsiao, Eric Y Chuang, Chia-Tung Shun, Yen-Hsuan Ni, Ramnik J Xavier, Daniel K Podolsky, Jeffery J Y Yen, Jau-Min Wong
BACKGROUND: The integrity of the gut barrier in patients with inflammatory bowel disease is known to be impaired but the exact mechanisms remain mostly unknown. SHANK3 mutations are associated with autism, and patients with autism are known to have higher proportions of inflammatory bowel disease. Here, we explore the role of SHANK3 in inflammatory bowel disease, both in vivo and in vitro. METHODS: Dextran sulfate sodium colitis was induced in SHANK3 knockout mice...
August 23, 2017: Inflammatory Bowel Diseases
Shu-Chen Wei, Hsin-Fang Yang-Yen, Po-Nien Tsao, Meng-Tzu Weng, Chien-Chih Tung, Linda C H Yu, Liang-Chuan Lai, Jen-Hao Hsiao, Eric Y Chuang, Chia-Tung Shun, Yen-Hsuan Ni, Ramnik J Xavier, Daniel K Podolsky, Jeffery J Y Yen, Jau-Min Wong
BACKGROUND: The integrity of the gut barrier in patients with inflammatory bowel disease is known to be impaired but the exact mechanisms remain mostly unknown. SHANK3 mutations are associated with autism, and patients with autism are known to have higher proportions of inflammatory bowel disease. Here, we explore the role of SHANK3 in inflammatory bowel disease, both in vivo and in vitro. METHODS: Dextran sulfate sodium colitis was induced in SHANK3 knockout mice...
October 2017: Inflammatory Bowel Diseases
Sangdoo Kim, Hyunju Kim, Yeong Shin Yim, Soyoung Ha, Koji Atarashi, Tze Guan Tan, Randy S Longman, Kenya Honda, Dan R Littman, Gloria B Choi, Jun R Huh
Maternal immune activation (MIA) contributes to behavioural abnormalities associated with neurodevelopmental disorders in both primate and rodent offspring. In humans, epidemiological studies suggest that exposure of fetuses to maternal inflammation increases the likelihood of developing autism spectrum disorder. In pregnant mice, interleukin-17a (IL-17a) produced by T helper 17 (TH17) cells (CD4(+) T helper effector cells involved in multiple inflammatory conditions) induces behavioural and cortical abnormalities in the offspring exposed to MIA...
September 13, 2017: Nature
Yoko Uchiyama-Tanaka
BACKGROUND: The composition of intestinal microbiota is very important in human health. Gastrointestinal disturbances are among the symptoms commonly reported by individuals diagnosed with chronic diseases, such as inflammatory bowel disease, autism, and chronic fatigue syndrome. The effects of probiotics and prebiotics for dysbiosis have been reported in many studies. Bowel nosodes are homeopathic remedies made from human gut microbiota. OBJECTIVE: Bowel nosodes made from the intestinal bacteria of European patients from the 1900s were administered to Japanese patients suffering from gastrointestinal disturbances, such as constipation and diarrhea, to determine their therapeutic efficacy...
August 14, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
Li Wang, Yu-Mei Yu, You-Qi Zhang, Jie Zhang, Na Lu, Na Liu
The aim of this study is to assess the prevalence of small intestinal bacterial overgrowth (SIBO) by hydrogen breath test in patients with autism spectrum disorders (ASD) with respect to a consistent control group. From 2011 to 2013, 310 children with ASD and 1240 sex- and age-matched typical children were enrolled in this study to undergo glucose breath test. The study participants were considered to exhibit SIBO when an increase in H2 of ≥20 ppm or CH4 of ≥10 ppm with respect to the fasting value was observed up to 60 min after the ingestion of glucose...
August 10, 2017: European Child & Adolescent Psychiatry
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