Autism, schizophrenia, bipolar disorder share molecular traits, study finds

Most medical disorders have well-defined physical characteristics seen in tissues, organs and bodily fluids. Psychiatric disorders, in contrast, are not defined by such pathology, but rather by behavior.A UCLA-led study,publishedin Science, has found that autism, schizophrenia and bipolar disorder share some physical characteristics — and important differences — at the molecular level, specifically, patterns of gene expression in the brain. Gene expression is the process by which instructions in DNA are converted into a product, such as a protein.“These findings provide a molecular, pathological signature of these disorders, which is a large step forward,” said senior author Daniel Geschwind, a distinguished professor of neurology, psychiatry and human genetics and director of the UCLA Center for Autism Research and Treatment. “The maj or challenge now is to understand how these changes arose.”Researchers know that certain variations in genetic material put people at risk for psychiatric disorders, but DNA alone doesn ’t tell the whole story. Every cell in the body contains the same DNA; RNA molecules, on the other hand, play a role in gene expression in different parts of the body, by “reading” the instructions contained within DNA.Geschwind and the study ’s lead author, Michael Gandal, reasoned that taking a close look at the RNA in human brain tissue would provide a molecular profile of these psychiatric disorders...
Source: UCLA Newsroom: Health Sciences - Category: Universities & Medical Training Source Type: news

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Conclusion: Although a cause–effect relationship cannot be firmly stated, an association between early trauma experience and cognitive impairment such as visual memory, as well as a relationship between negative symptoms and attention domains, is suggested by our preliminary findings. Future studies with larger sample sizes and prospective design will clarify the long-term effects of early exposure to trauma and its clinical meaning in terms of developing psychotic-related illness.IntroductionMore than 75% of patients with schizophrenia show some level of cognitive impairment, leading to poor functional status and im...
Source: Frontiers in Psychiatry - Category: Psychiatry Source Type: research
Does Prenatal Stress Shape Postnatal Resilience? – An Epigenome-Wide Study on Violence and Mental Health in Humans Fernanda Serpeloni1,2, Karl M. Radtke1,3, Tobias Hecker4, Johanna Sill1, Vanja Vukojevic5, Simone G. de Assis2, Maggie Schauer1, Thomas Elbert1 and Daniel Nätt6* 1Clinical Psychology and Neuropsychology, Department of Psychology, University of Konstanz, Konstanz, Germany 2Department of Studies in Violence and Health Jorge Careli, National School of Public Health of Rio de Janeiro – National Institute of Women, Children and Adolescents Health Fernandes Figueira, Oswaldo Cruz Foundation, ...
Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research
We presented a new statistic T to use large public database as reference to reduce concern of potential population stratification. And the new statistic proposed here is effective to discover novel genome-wide significant loci with both small and large sample sizes. Author Contributions YW conceived the idea and developed the software. YL, MH, and XL contributed data analysis, generating tables and figures, and manuscript writing. YW, YL, MH, XL, YS, and LJ contributed the theoretical analysis and manuscript revision. MX helped support the GWAS datasets. YW, YL, MH, XL, MZ, JW, and MX contributed to scientific discussion...
Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research
Publication date: Available online 18 February 2019Source: NeuroscienceAuthor(s): Katherine Najera, B. Matthew Fagan, Peter M. ThompsonAbstractSynaptosomal Associated Protein-25 kilodaltons (SNAP-25) is an integral member of the SNARE complex. This complex is essential for calcium-triggered synaptic vesicular fusion and release of neurotransmitters into the synaptic cleft. In addition to neurotransmission, SNAP-25 is associated with insulin release, the regulation of intracellular calcium, and neuroplasticity. Because of SNAP-25's varied and crucial biological roles, the consequences of changes in this protein can be seen ...
Source: Neuroscience - Category: Neuroscience Source Type: research
CONCLUSIONS: Given the unique character of each study design, the convergent findings for these eight psychiatric conditions suggest that heritability estimates are robust across different methods. The findings also highlight large differences in genetic and environmental influences between psychiatric disorders, providing future directions for etiological psychiatric research. PMID: 30221610 [PubMed - as supplied by publisher]
Source: Psychological Medicine - Category: Psychiatry Authors: Tags: Psychol Med Source Type: research
Depression, alcoholism, and other psychiatricillnesses share disease-related “signatures”involving a disruption in how brain cells communicate with each other.Thestudy, entitled “Shared molecular neuropathology across major psychiatric disorders parallels polygenic overlap,” by Michael J. Gandal et. al., appears inScience,  February 9, 2018.A Washington Postarticle on the study says:“The scientists found similar levels of particular molecules in the brains of people with autism, schizophrenia and bipolar disorder; other commonalities between bipolar and major depression; and oth...
Source: Addiction Inbox - Category: Addiction Authors: Source Type: blogs
The predisposition to neuropsychiatric disease involves a complex, polygenic, and pleiotropic genetic architecture. However, little is known about how genetic variants impart brain dysfunction or pathology. We used transcriptomic profiling as a quantitative readout of molecular brain-based phenotypes across five major psychiatric disorders—autism, schizophrenia, bipolar disorder, depression, and alcoholism—compared with matched controls. We identified patterns of shared and distinct gene-expression perturbations across these conditions. The degree of sharing of transcriptional dysregulation is related to polyge...
Source: ScienceNOW - Category: Science Authors: Tags: Genetics reports Source Type: news
People have said this to me many times over the years. Here’s another Wheat Belly Basics conversation for newcomers or a refresher for the seasoned Wheat Belly follower. One of the reason that wheat and related grains are such effective causes of weight gain is that they contain a protein, gliadin, that, upon digestion, yields opioid peptides that bind to the opiate receptors of the human brain. These opioid peptides are responsible for generating addictive relationships with food, as well as behavioral and emotional effects. Stop eating grains and an opiate withdrawal syndrome ensues: nausea, headache, fatigue, depr...
Source: Wheat Belly Blog - Category: Cardiology Authors: Tags: Wheat Belly Lifestyle addiction appetite stimulant binge eating bulimia Detox eating disorders gluten gluten-free grain-free grains health opiates opioids Weight Loss wellness withdrawal Source Type: blogs
AbstractWe review progress made concerning the participation of candidate genes in the determination of attention deficit disorder with hyperactivity (ADHD) as well as recent evidence on its genetic determination based on molecular methodology. In addition to linkage analyses, we discuss recent results obtained through genome-wide association studies (GWAS). We also discuss the genetic comorbidity estimated between ADHD and major psychiatric disorders such as schizophrenia (E), major depressive disorder (MDD), bipolar disorder (BD), and autism spectrum disorders (ASD). Furthermore, we examine both the geographical distribu...
Source: Current Genetic Medicine Reports - Category: Genetics & Stem Cells Source Type: research
Recent work using a mouse model has identified the glutamate metabotropic receptor 7 (Grm7) gene as a strong candidate gene for alcohol consumption. Although there has been some work examining the effect of human glutamate metabotropic receptor 7 (GRM7) polymorphisms on human substance use disorders, the majority of the work has focused on other psychiatric disorders such as ADHD, major depressive disorder, schizophrenia, bipolar disorder, panic disorder, and autism spectrum disorders. The current study aimed to evaluate evidence for association between GRM7 and alcohol behaviors in humans using a single nucleotide polymor...
Source: Alcohol - Category: Addiction Authors: Source Type: research
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