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Ongoing human evolution could explain recent rise in certain disorders
Date:1/11/2010

Cambridge, Mass., January 11, 2010 The subtle but ongoing pressures of human evolution could explain the seeming rise of disorders such as autism, autoimmune diseases, and reproductive cancers, researchers write in the Proceedings of the National Academy of Sciences. Certain adaptations that once benefited humans may now be helping such ailments persist in spite of or perhaps because of advancements in modern culture and medicine.

"This work points out linkages within the plethora of new information in human genetics and the implications for human biology and public health, and also illustrates how one could teach these perspectives in medical and premedical curricula," says author Peter Ellison, John Cowles Professor of Anthropology at Harvard University.

Ellison's co-authors are Stephen Stearns of Yale University, Randolph Nesse of the University of Michigan, and Diddahally Govindaraju of the Boston University School of Medicine. The research was first presented at the Arthur M. Sackler Colloquium, co-sponsored by the National Academy of Science and the Institute of Medicine.

Colloquium presentations described in the current paper include research suggesting that:

  • Autism and schizophrenia may be associated with the over-expression of paternally or maternally derived genes and influences, a hypothesis advanced by Bernard Crespi of Simon Fraser University.

  • Maternal and paternal genes engage in a subtle tug-of-war well into childhood with consequences for childhood development, as posited by David Haig, George Putnam Professor of Organismic and Evolutionary Biology at Harvard.

  • Humans may be susceptible to allergies, asthma, and autoimmune diseases because of increased hygiene, according to Kathleen Barnes of Johns Hopkins University. Without being exposed to intestinal worms and parasites, as our ancestors were, our immune systems are hypersensitive.

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Contact: Amy Lavoie
amy_lavoie@harvard.edu
617-496-9982
Harvard University
Source:Eurekalert

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