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Specific gene linked to adult growth of brain cells, learning, memory

Date:
June 9, 2014
Source:
City of Hope
Summary:
Stimulating a specific gene could prompt growth – in adults – of new neurons in this critical region, leading to faster learning and better memories, researchers report. Understanding the link between this gene and the growth of new neurons – or neurogenesis – is an important step in developing therapies to address impaired learning and memory associated with neurodegenerative diseases and aging.

Learning and memory are regulated by a region of the brain known as the hippocampus. New research from City of Hope has found that stimulating a specific gene could prompt growth – in adults – of new neurons in this critical region, leading to faster learning and better memories.

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Understanding the link between this gene and the growth of new neurons – or neurogenesis – is an important step in developing therapies to address impaired learning and memory associated with neurodegenerative diseases and aging. The new research was published June 9 in the Proceedings of the National Academy of Sciences.

The study, which used an animal model, found that over-expressing the gene – a nuclear receptor called TLX – resulted in smart, faster learners that retained information better and longer.

“Memory loss is a major health problem, both in diseases like Alzheimer’s, but also just associated with aging,” said Yanhong Shi, Ph.D., lead author of the study and a neurosciences professor at City of Hope. “In our study, we manipulated the expression of this receptor by introducing an additional copy of the gene – which obviously we cannot do outside the laboratory setting. The next step is to find the drug that can target this same gene.”

The discovery creates a new potential strategy for improving cognitive performance in elderly patients and those who have a neurological disease or brain injury.

The bulk of the brain’s development happens before birth, and there are periods –largely in childhood and young adulthood – when the brain experiences bursts of new growth. In the past couple of decades, however, scientists have found evidence of neurogenesis in later adulthood – occurring mostly in the hippocampus, the region of the brain associated with learning and memory.

The new study is the first to firmly link the TLX gene to a potential for enhancing learning and memory.

Researchers found that over-expression of the gene was actually associated with a physically larger brain, as well as the ability to learn a task quickly. Furthermore, over-expression of the gene was linked with the ability to remember, over a longer period of time, what had been learned.


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The above story is based on materials provided by City of Hope. Note: Materials may be edited for content and length.


Cite This Page:

City of Hope. "Specific gene linked to adult growth of brain cells, learning, memory." ScienceDaily. ScienceDaily, 9 June 2014. <www.sciencedaily.com/releases/2014/06/140609153329.htm>.
City of Hope. (2014, June 9). Specific gene linked to adult growth of brain cells, learning, memory. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2014/06/140609153329.htm
City of Hope. "Specific gene linked to adult growth of brain cells, learning, memory." ScienceDaily. www.sciencedaily.com/releases/2014/06/140609153329.htm (accessed October 25, 2014).

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