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A large study by researchers at Columbia University Mailman School of Public Health and the Norwegian National Institute of Public Health has identified molecular signatures of gestational inflammation linked to the risk of developing autism spectrum disorder (ASD).These findings, which provide insights into abnormal brain development, could eventually lead to a test to screen for ASD at birth. The study was published in the journal 'Molecular Psychiatry'.The new research aligns with growing evidence that the risk of ASD is increased by fetal exposure to inflammation. In earlier studies, the researchers linked ASD risk to prenatal exposure to maternal fever, and to influenza infection and herpesvirus type 2 infection -- two of many potential triggers for maternal inflammation and ASD.In the new study, researchers analyzed the presence of 60 molecular markers of immune response, including cytokines and growth factors. Blood samples were collected during pregnancy (maternal mid-gestational blood sample) and at birth (cord blood) from 957 children, roughly half of whom were later diagnosed with ASD. The study linked ASD risk to groupings of inflammation-related molecules, with different groupings seen in boys versus girls.Among the most predictive molecules were interleukins like IL1RA and IL4. Four molecules thought to be involved in fetal brain development were also linked to ASD risk in both sexes: TNFa, Serpin E1, VCAM1, and IL1b. Biomarkers collected at birth were only slightly less predictive than those collected during pregnancy."Our research suggests a period of vulnerability during gestation when inflammation can interfere with central nervous system development," said first author Xiaoyu (Jason) Che, PhD, assistant professor of biostatistics in the Center for Infection and Immunity at Columbia Mailman School."We found immune signatures in mid-pregnancy blood samples from mothers and in umbilical cord blood from children later diagnosed with autism that correlate with responses to infection, and molecules important for the development of the brain and its blood supply," said study co-first author, Mady Hornig, MD, associate professor of epidemiology at Columbia Mailman School."This work illustrates the unique power of prospective cohorts for elucidating the roots of disease," said corresponding author, Ezra Susser, professor of epidemiology and psychiatry."This paper is the culmination of more than 20 years of data and sample collection and analysis in collaboration with our colleagues in the Norwegian Institute of Public Health. Our future research will focus on finding the triggers for inflammation and links between those triggers and genetic susceptibility," said W. Ian Lipkin, John Snow Professor of Epidemiology and professor of neurology and pathology.( With inputs from ANI )Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Health :Researchers discover biomarkers linked to autism risk

A recent clinical study led by a team of international researchers has identified molecular signatures of gestational inflammation linked to the risk of developing autism spectrum disorder (ASD). ...

Health :Study identifies biomarkers linked to autism risk

A large study by researchers at Columbia University Mailman School of Public Health and the Norwegian National Institute of Public Health has identified molecular signatures of gestational inflammation linked to the risk of developing autism spectrum ...