We've updated our Privacy Policy to make it clearer how we use your personal data.

We use cookies to provide you with a better experience. You can read our Cookie Policy here.

Advertisement
Link Between Diabetes and Alzheimer's Strengthened by Hyperglycemic Mice
News

Link Between Diabetes and Alzheimer's Strengthened by Hyperglycemic Mice

Link Between Diabetes and Alzheimer's Strengthened by Hyperglycemic Mice
News

Link Between Diabetes and Alzheimer's Strengthened by Hyperglycemic Mice

Credit: Photo Mix/ Pixabay
Read time:
 

Want a FREE PDF version of This News Story?

Complete the form below and we will email you a PDF version of "Link Between Diabetes and Alzheimer's Strengthened by Hyperglycemic Mice "

First Name*
Last Name*
Email Address*
Country*
Company Type*
Job Function*
Would you like to receive further email communication from Technology Networks?

Technology Networks Ltd. needs the contact information you provide to us to contact you about our products and services. You may unsubscribe from these communications at any time. For information on how to unsubscribe, as well as our privacy practices and commitment to protecting your privacy, check out our Privacy Policy

A team of UNLV neuroscientists has strengthened the link between Type II diabetes and Alzheimer’s disease.

In a study published in the September issue of the journal Communications Biology, researchers show that chronic hyperglycemia impairs working memory performance and alters fundamental aspects of working memory networks.

“Diabetes is a major risk factor for developing Alzheimer's disease, but it is not clear why,” says James Hyman, study author and associate professor of psychology at UNLV. “We show that a central feature of diabetes, hyperglycemia, impairs neural activity in ways that are similar to what is observed in preclinical Alzheimer's disease models. This is the first evidence showing neural activity changes due to hyperglycemia overlap with what is observed in Alzheimer’s systems.”

The research project is the continuation of a six-year collaboration between Hyman and coauthor Jefferson Kinney, chair and professor in UNLV’s Department of Brain Health, to better understand why diabetes can elevate risk for Alzheimer’s. The work is funded by a grant from the National Institute on Aging.

“As the number of Alzheimer’s disease diagnoses rapidly rises and the incidence of diabetes and pre-diabetes has accelerated, it’s crucial that we understand what connects these two disorders,” Kinney said.

The researchers found that two parts of the brain that are central to forming and retrieving memories — the hippocampus and the anterior cingulate cortex — were over-connected, or hypersynchronized. When it came time to remember the correct information and complete a task, these two parts of the brain – which are affected early in Alzheimer’s progression – were over-communicating with each other, sparking errors.

“We know synchrony is important for different parts of the brain to work together. But, we’re finding more and more these days, that the key with neural synchrony is it has to happen at the right time, and it has to happen with control,” Hyman said. “Sometimes, there’s just too much ‘talking’ between certain areas and we think this leads to memory difficulties, among other things.”

Hyman compares the situation to a CEO who hands over a majority of the company’s business operations to their son, who then decides to upend previous communication structures and become the sole gatekeeper of information.

“The only communication the CEO has is with one person, as opposed to talking with all of the other people in the office,” Hyman said. “It is possible that in Alzheimer’s patients there’s over-connection in certain areas where there should be flexibility. And in the models in our study, we’re seeing evidence of that in real-time at these crucial moments to do the task.”

This most recent finding not only provides novel information about brain activity in the hyperglycemia model, it also provides an additional important measure that can be used for continuing research.

“Our next step is to combine the biochemical markers and electrophysiology data to test specific mechanisms responsible and potential treatments,” said Kinney. “This research will now be able to work towards understanding the risk as well as what may be able to be done to help.”

Hyman agreed.

“To see the science now start to come out, and to now hopefully have an impact on the field, and to have other labs potentially build on our work, I think really opens up lots of avenues for future exploration. Jeff Kinney’s group has put years into developing this model, and we’re fortunate enough to be collaborating with them and be a part of this growing area of research. It speaks to the power of collaborative work, which is one of the things that is fantastic about UNLV.”

Reference: Wirt RA, Crew LA, Ortiz AA, et al. Altered theta rhythm and hippocampal-cortical interactions underlie working memory deficits in a hyperglycemia risk factor model of Alzheimer’s disease. Commun Biol. 2021;4(1):1036. doi: 10.1038/s42003-021-02558-4

This article has been republished from the following materials. Note: material may have been edited for length and content. For further information, please contact the cited source.


Advertisement