Compound found in red wine opens door for new treatments for depression, anxiety

Like to unwind with a glass of red wine after a stressful day? Don't give alcohol all the credit. New research has revealed that the plant compound resveratrol, which is found in red wine, displays anti-stress effects by blocking the expression of an enzyme related to the control of stress in the brain, according to a University at Buffalo-led study.

The findings shed light onto how resveratrol impacts neurological processes. According to the Anxiety and Depression Association of America, depression and anxiety disorders affect 16 and 40 million people respectively in the United States.

"Resveratrol may be an effective alternative to drugs for treating patients suffering from depression and anxiety disorders," says Ying Xu, MD, PhD, co-lead author and research associate professor in the UB School of Pharmacy and Pharmaceutical Sciences.

The study, published on July 15 in the journal Neuropharmacology, was also led by Xiaoxing Yin, PhD, professor at Xuzhou Medical University in China.

Protection Against Extreme Stress

Resveratrol, which has been linked to a number of health benefits, is a compound found in the skin and seeds of grapes and berries. While research has identified resveratrol to have antidepressant effects, the compound's relationship to phosphodiesterase 4 (PDE4), an enzyme influenced by the stress hormone corticosterone, was unknown.

Corticosterone regulates the body's response to stress. Too much stress, however, can lead to excessive amounts of the hormone circulating in the brain and, ultimately, the development of depression or other mental disorders.

These unknown physiological relationships make drug therapy complex. Current antidepressants instead focus on serotonin or noradrenaline function in the brain, but only one-third of patients with depression enter full remission in response to these medications, says Xu.

In a study on mice, researchers revealed that PDE4, induced by excessive amounts of corticosterone, causes depression- and anxiety-like behavior.

The enzyme lowers cyclic adenosine monophosphate -- a messenger molecule that signals physiological changes such as cell division, change, migration and death -- in the body, leading to physical alterations in the brain.

Resveratrol displayed neuroprotective effects against corticosterone by inhibiting the expression of PDE4. The research lays the groundwork for the use of the compound in novel antidepressants.

Although red wine contains resveratrol, consumption of alcohol carries various health risks, including addiction.

Xia Zhu, Wenhua Li, Yongkun Li, Wenhua Xu, Yirong Yuan, Victor Zheng, Hanting Zhang, James M O'Donnell, Ying Xu, Xiaoxing Yin.
The antidepressant- and anxiolytic-like effects of resveratrol: Involvement of phosphodiesterase-4D inhibition.
Neuropharmacology, Volume 153, 15 July 2019, Pages 20-31. doi: 10.1016/j.neuropharm.2019.04.022.

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