Skip Ribbon Commands
Skip to main content
Translate
Translate this website into the following languages:



Close Tab
Donations
<a href="/"><img alt="UC San Diego Health"  oncontextmenu="return false;" style="position:relative;top:10px" src="data:image/png;base64,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" /></a>
menu iconMenu
search iconSearch

Research Sheds Light on Cellular Basis of Depression

 

February 23, 2011  |  

Recent studies suggest that neurons in a particular area of the brain called the lateral habenula (LHb) are activated in models of depression. These neurons are activated by stimuli linked to disappointment or anticipation of a negative outcome, and they modulate dopamine-rich regions of the brain that control reward-seeking behavior and play a part in depressive disorders.

Researchers at the University of California, San Diego School of Medicine, along with co-investigators at Cold Spring Harbor Laboratory and Brookhaven National Laboratory, set out to investigate the cellular basis of behavioral depression by studying the synaptic activity of LHb neurons in rats. 

Their study, published in the February 24 issue of the journal Nature, showed abnormally strong activity in the neuronal synapses of the LHb in a rat model of depression.  Additionally, when these synapses were inactivated, the animals recovered from the depressive symptoms to some degree.

The research suggests that targeting the specific synapses in this part of the brain could reduce symptoms in humans with severe, chronic depression.

Roberto Malinow

Roberto Malinow, MD, PhD

“It’s possible that the genes specifically expressed in these neurons could be targeted genetically or pharmacologically in order to manipulate them and reduce depression,” said Roberto Malinow, MD, PhD, professor of neurosciences at the UC San Diego School of Medicine and Shiley-Marcos Endowed Chair in Alzheimer’s Disease Research, who pointed out that the LHb also has the highest concentration of receptors to opiates.

The scientists utilized widely used animal models of depression called acute learned helplessness (aLH), and a strain of rats with congenital learned helplessness (cLH), produced by selective breeding of animals displaying the greatest amount of aLH.  In both types, the researchers examined transmission to the LHb neurons, which receive major inputs from numerous parts of the brain involved in stress response, as well as those linked to pleasure and pain. 

“The studies showed a significant correlation between increased activation of LHb neurons and an individual animal’s helpless behavior – behavior that mirrors the type of inertia or helplessness often experienced in humans with depression,” said Malinow.   Depleting transmission by repeated electrical stimulation of LHb input nerves – using a protocol that can be effective with depressed patients – dramatically suppressed the synaptic activity, and reduced learned helplessness behavior in the rats.

“Since the communication activity in this particular part of the brain was increased in aLH and cLH rats compared to control animals, it appears that such increased activity contributes to helplessness,” Malinow said.  “Even without negative stimulus, the cLH rats demonstrated helplessness, or depressive-like symptoms, leading us to conclude that synapses in the lateral habenula may be genetically encoded to be abnormally active.”

Cold Spring - Depression

Click on photo (above) to watch video of Co-Principal Investigator Fritz Henn of Cold Spring Harbor Laboratory discussing the study.

Contributors to the study include first author Bo Li, Center for Neural Circuits and Behavior, UC San Diego Departments of Neuroscience and Biological Sciences, and Cold Spring Harbor Laboratory; Joaquin Piriz, ChiHye Chung and Christophe D. Proulx, UC San Diego Center for Neural Circuits and Behavior; Martine Mirrione and co-principal investigator Fritz Henn, Cold Spring Harbor and Brookhaven National Laboratories; and Daniela Schulz, Brookhaven National Laboratory.

The study was funded in part by the Dana Foundation and the Biobehavioral Research Awards for Innovative New Scientists (BRAINS) from NIH/NIMH (1R01MH091903-01). R.M. is supported by the Shiley-Marcos endowment.

# # #

Media Contact: Debra Kain, 619-543-6163, ddkain@ucsd.edu


Related Specialties

Neurosciences
Psychiatry


Media Contact

Share This Article


Related News

5/2/2016
Local philanthropists Gary and Mary West have provided $11.8 million to the University of California San Diego to create a state-of-the-art senior emergency care unit to be housed within the Emergency ...
4/27/2016
Urologists at University of California San Diego School of Medicine and Genesis Healthcare Partners have tested a new model of care for patients with low-risk prostate cancer. The evidence-based appro ...
4/26/2016
The California HIV/AIDS Research Program (CHRP) of University of California has awarded grants totaling $9.4 million to three teams of investigators to provide and evaluate PrEP – the HIV prevention p ...
4/26/2016
While technological advances have made it easier to map our microbiomes and metabolomes, these studies typically take too long for that data to be medically useful. Researchers at the University of Ca ...



Follow Us