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Newborns have elevated levels of a biomarker for Alzheimer’s

Newborn babies and patients with Alzheimer’s disease share an unexpected biological trait: elevated levels of a well-known biomarker for Alzheimer’s, as shown in a study led by researchers at the University of Gothenburg and published in Brain Communications.

First author Fernando Gonzalez-Ortiz and senior author Professor Kaj Blennow recently reported that both newborns and Alzheimer’s patients have elevated blood levels of a protein called phosphorylated tau, specifically a form called p-tau217.

This protein has largely been used as a diagnostic test for Alzheimer’s disease, where an increase in p-tau217 blood levels is proposed to be driven by another process, namely the aggregation of b-amyloid protein into amyloid plaques. Newborns (for natural reasons) do not have this type of pathological change, so interestingly, in newborns increased plasma p-tau217 seems to reflect a completely different—and entirely healthy—mechanism.

Parkinson’s drug reduces symptoms in treatment-resistant depression, clinical trial finds

A drug used for Parkinson’s disease has been shown to be effective in reducing the symptoms of difficult to treat depression, according to a study led by the University of Oxford.

In the largest clinical trial to date, pramipexole was found to be substantially more effective than a placebo at reducing the symptoms of (TRD) over the course of nearly a year, when added to ongoing antidepressant medication.

The trial, published in The Lancet Psychiatry, included 150 patients with treatment-resistant depression, with equal numbers receiving 48 weeks of pramipexole or a placebo, alongside ongoing antidepressant medication.

Individual neurons in amygdala and hippocampus encode visual features that help recognize faces, study finds

Humans are innately capable of recognizing other people they have seen before. This capability ultimately allows them to build meaningful social connections, develop their sense of identity, better cooperate with others, and identify individuals who could pose a risk to their safety.

Several past studies rooted in neuroscience, psychology and have tried to shed light on the neural processes underlying the ability to encode other people’s identities. Most findings collected so far suggest that the identity of others is encoded by neurons in the and hippocampus, two known to support the processing of emotions and the encoding of memories, respectively.

Based on evidence collected in the past, researchers have concluded that neurons in these two brain regions respond in specific ways when we meet a person we are acquainted with, irrespective of visual features (i.e., how their face looks). A recent paper published in Nature Human Behaviour, however, suggests that this might not be the case, and that in the amygdala encode and represent , ultimately supporting the identification of others.

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