Anhedonia News and Research

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New framework maps depression symptoms to unique brain circuits

A research team from the Sant Pau Research Institute (IR Sant Pau) has published a scientific review proposing a paradigm shift in the way depression is understood and studied.

1 Oct 2026

Social connection has a price, and it varies from person to person

Researchers found that people were willing to spend slightly more on social than on non-social experiences, suggesting that companionship has measurable economic value. Greater perceived social support was associated with more social choices and spending, while higher autistic-trait scores and broader social dysfunction were associated with lower valuation of social experiences.

29 Sep 2026

Ultrasonic vocalizations in rats linked to pleasurable food consumption

Understanding how the brain processes rewarding experiences could help researchers better understand behaviors such as overeating, as well as conditions such as anhedonia-the inability to experience pleasure, which is a common symptom of depression.

8 Sep 2026

GLP-1 drugs looked promising for depression. The evidence tells a more complicated story

A systematic review of 43 studies found highly heterogeneous results for GLP-1 receptor agonists across animal models and human research assessing depression-, anxiety-, and stress-related outcomes. No study directly tested these drugs as a treatment for PTSD, and the available evidence does not currently support their use for depression or PTSD, although people with metabolic dysfunction may warrant further investigation.

7 Sep 2026

Psilocybin microdosing sounds promising, but the strongest studies tell a different story

A systematic review of 11 studies involving 3,262 adults found that psilocybin mushroom and truffle microdosing was associated with reported improvements across areas including mental health, well-being, cognition, creativity, and social functioning. However, the evidence was methodologically weak and highly heterogeneous, the two placebo-controlled trials found no significant improvements, and inadequate adverse-event reporting means efficacy and safety remain uncertain.

7 Sep 2026

Childhood trauma affects brain pathways linked to adult anhedonia

Experiencing trauma in childhood can lead to a lack of motivation and less pleasure from rewards-or anhedonia-later in life.

17 Aug 2026

New review shows why antidepressants often fail in Alzheimer’s and Parkinson’s depression

A Molecular Psychiatry review shows that depression in Alzheimer’s and Parkinson’s disease may reflect disease-specific molecular, neurotransmitter, inflammatory, and circuit-level disruptions rather than standard depression biology alone. It argues that broad antidepressants often show limited efficacy in these patients and that future trials should use biomarkers, neuroimaging, and symptom profiling to guide targeted treatments.

7 Jul 2026

Parkinson's drug may ease anhedonia in treatment-resistant depression

For many people who suffer from depression, the condition is not just about feeling down, but also about a loss of motivation and difficulty finding pleasure in activities they used to enjoy.

12 Jun 2026

Could blocking inflammation help treat difficult-to-treat depression?

A small proof-of-concept RCT found that tocilizumab, an IL-6 receptor blocker, showed a non-significant but clinically suggestive pattern of improvement in difficult-to-treat depression linked to low-grade inflammation. The study found that baseline hs-CRP, rather than IL-6, may help identify patients most likely to respond, supporting larger trials of immune-targeted depression care.

22 May 2026

Experimental smartphone game quickly identifies patients with depression

An experimental diagnostic tool in the form of a computer game was able to quickly identify patients with depression based on anhedonia, a key feature of the disease, a new study shows.

19 May 2026

Cellular aging in immune cells signals early onset of cognitive depression

Blood tests measuring the aging of certain white blood cells can predict cognitive and mood-related symptoms of depression, rather than physical symptoms.

4 May 2026

Study reveals overlooked depression symptoms in South Asian communities

Physical pain, heart-related sensations and repetitive negative thinking are among the most commonly reported symptoms of depression in South Asian communities - yet none appear in the diagnostic criteria used to screen for depressive disorders in the UK, according to a new review led by the University of Surrey.

26 Mar 2026

Study explores post-game depression and emotional impact on players

Experiencing a sense of loss and sadness after dozens of hours spent on a video game? Researchers from SWPS University and the Stefan Batory Academy of Applied Sciences examined the feeling of emptiness that accompanies completing an engaging computer game.

19 Mar 2026

Emotional pain often outweighs fear in post-traumatic stress disorder

New research is challenging the long-held view of post-traumatic stress disorder (PTSD) as a fear-based disorder. In a new study, 68% of trauma-exposed individuals reported that emotional pain (guilt, shame, sadness, loss of joy) impaired their daily functioning more than fear.

4 Feb 2026

New role for GLP-1 drugs: Improving survival in people with severe psychiatric disorders

This editorial argues that GLP-1 receptor agonists could substantially improve healthspan and reduce premature mortality in people with serious mental illnesses by targeting cardiometabolic risk rather than psychiatric symptoms alone. It highlights emerging evidence, safety considerations, and equity challenges that position GLP-1 RAs as a promising public health strategy for this high-risk population.

25 Jan 2026

Alternative splicing of DOC2A gene shown to drive schizophrenia risk

In an important new study, Chinese researchers have discovered the previously unrecognized role of alternative splicing of the DOC2A gene in schizophrenia.

16 Jan 2026

Targeting inflammation may reduce depression severity and anhedonia

Naoise Mac Giollabhui, PhD, of the Department of Psychiatry at Mass General Brigham, is the lead author of a paper published in American Journal of Psychiatry, "Effect of anti-inflammatory treatment on depressive symptom severity and anhedonia in depressed individuals with elevated inflammation: Systematic review and meta-analysis of randomized controlled trials." Richard Liu, PhD, of the Department of Psychiatry at Mass General Brigham, is the senior author.

10 Dec 2025