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PET scans help identify mechanism underlying seasonal mood changes

Researchers found that serotonin transporter binding potential values were higher in fall and winter, suggesting a link between lower serotonin levels and seasonal mood changes. The study suggests that variations in brain serotonin levels may explain why people feel happier on sunny days and more sluggish during the dark winter season.

SourceJAMA Network·JournalArchives of General Psychiatry·DateSep 1, 2008

Potential new targets for antidepressant medications

A new study suggests that blocking the corticotrophin releasing factor-1 (CRF1) receptor and the vasopressin-1B (V1B) receptor may retain their efficacy in treating depression, even when neurogenesis is disrupted. The researchers found that restoration of the stress axis may be key to how these new antidepressant approaches work.

SourceElsevier·JournalBiological Psychiatry·DateAug 27, 2008

Chronic stress alters our genetic immune response

Researchers found that chronic stress alters the genetic immune response by changing the pattern of gene expression in monocytes, a type of white blood cell involved in the body's immune response. This altered response can lead to increased inflammation and contribute to the risk for illnesses like depression, heart disease, and diabetes.

SourceElsevier·JournalBiological Psychiatry·DateAug 27, 2008

Right place and right time can trigger drinking

Researchers found that physical surroundings where alcohol cues are experienced can greatly influence the ability of those cues to trigger relapse. The study suggests that presenting cues repeatedly in multiple distinct contexts without alcohol can diminish their triggering effect.

SourceElsevier·JournalBiological Psychiatry·DateJul 29, 2008

The kids most likely to go armed

A new analysis of a 2005 survey found that male students were more likely to carry weapons than females, with certain racial groups also being overrepresented. The study suggests that socioeconomic factors, such as living in violent neighborhoods, may contribute to the carrying of weapons among disadvantaged students.

SourceBMC (BioMed Central)·JournalAnnals of General Psychiatry·DateJul 28, 2008

NYU Langone Medical Center's tip sheet to the International Conference on Alzheimer's Disease 2008

Researchers at NYU Langone Medical Center presented several key findings on Alzheimer's disease risk factors, including a study that identified signs of brain pathology in healthy individuals. They also reported promising results from couples counseling and antibody tests against common mouth bacteria linked to Alzheimer's disease. The...

Using genetics to improve traditional psychiatric diagnoses

A recent study published in Biological Psychiatry found four chromosomal regions linked to schizophrenia and bipolar disorder risk factors, suggesting that these disorders may represent different genetic subtypes. The discovery highlights the complexity of psychiatric diagnoses and provides new insights into potential treatment targets.

SourceElsevier·JournalBiological Psychiatry·DateJul 17, 2008

Private foster care program leads to better long-term health

A private foster care program has been shown to significantly improve long-term health outcomes for teenagers placed in the program compared to those in public programs. The study found lower rates of mental disorders, ulcers, and cardiometabolic problems, but more respiratory disorders.

SourceJAMA Network·JournalArchives of General Psychiatry·DateJun 2, 2008

It's okay to keep those feelings inside, new study suggests

A new study found that people who choose not to express their thoughts and feelings after experiencing a collective trauma, such as a school shooting or terrorist attack, may be better off than those who do talk about their feelings. The research suggests that it's okay to keep emotions inside in the immediate aftermath of a tragedy.

SourceUniversity at Buffalo·JournalJournal of Consulting and Clinical Psychology·DateJun 1, 2008

Do antidepressants enhance immune function?

Researchers found that antidepressant medications increased natural killer cell activity in HIV-infected women with and without depression. The study suggests a potential link between antidepressant treatment and improved innate immunity, which could delay HIV disease progression.

SourceElsevier·JournalBiological Psychiatry·DateMay 8, 2008

Laser dissection of depression

Researchers used laser micro-dissection to study gene expression in the human hypothalamus, a region crucial for stress response and depression development. The study found significant changes in five genes involved in corticotrophin-releasing factor activation, which may lead to new therapeutic strategies.

SourceMolecular Psychiatry·JournalMolecular Psychiatry·DateApr 22, 2008

Personality disorders cause emotional reactions in staff

A study published in BMC Psychiatry found that healthcare staff's emotional reactions to substance abuse patients with personality disorders depend on the type of disorder. Patients with antisocial personality disorder elicit feelings of distance, while those with avoidant personality disorder induce feelings of helpfulness.

SourceBMC (BioMed Central)·JournalBMC Psychiatry·DateApr 9, 2008

The conflict of reward in depression

A new study using fMRI found that people with depression show increased activation in the anterior cingulate region when anticipating reward, indicating a conflict between processing rewards and punishments. This finding suggests that depression may not be solely the absence of pleasure, but rather an experience of emotional pain or fr...

SourceElsevier·JournalBiological Psychiatry·DateMar 25, 2008

Treating SSRI-resistant depression

A new report suggests that switching from a selective serotonin reuptake inhibitor (SSRI) to a non-SSRI antidepressant may be more effective for treating symptoms of major depressive disorder. However, the effectiveness and tolerability of this approach varied depending on the individual.

SourceElsevier·JournalBiological Psychiatry·DateMar 25, 2008

Does stress damage the brain?

A study found reduced gray matter density in the pregenual anterior cingulate cortex of combat-exposed veterans with PTSD, but not their identical twins. The researchers suggest that stress exposure may cause this damage, leading to emotional consequences.

SourceElsevier·JournalBiological Psychiatry·DateMar 18, 2008

New genetic association with schizophrenia found by researchers

Researchers discovered a new genetic link between the MEGF10 gene and schizophrenia, finding that a variant of the gene is associated with increased heritability risk. The study also found that the MEGF10 gene is expressed more extensively in post-mortem brain tissue from individuals with schizophrenia.

SourceElsevier·JournalBiological Psychiatry·DateFeb 28, 2008

Blood testing for mood disorders

A new approach identifies five genes involved in myelination and six genes involved in growth factor signaling as potential biomarkers for high and low mood states. The study suggests that blood biomarkers may offer an informative window into brain functioning and disease state.

SourceMolecular Psychiatry·JournalMolecular Psychiatry·DateFeb 25, 2008

Researchers explore the antidepressant effects of ketamine

A new study finds that ketamine's antidepressant effects are mediated by its ability to increase AMPA receptor stimulation, suggesting drugs enhancing this function may have rapid antidepressant properties. Researchers now aim to develop AMPA-boosting drugs without ketamine's side effects.

SourceElsevier·JournalBiological Psychiatry·DateFeb 21, 2008

Older women more susceptible to depression than older men

A new study by Yale School of Medicine researchers found that older women are more prone to depression and less likely to die from it compared to older men. The study, which evaluated 754 individuals aged 70+, found that women were more likely to experience symptoms of depression and remain depressed over time.

SourceYale University·JournalArchives of General Psychiatry·DateFeb 5, 2008

Severe stressful events early in pregnancy may be associated with schizophrenia among offspring

A study of over 1.38 million Danish births found a significant association between exposure to severe stressful events during the first trimester and an increased risk of schizophrenia in children. Chemicals released by the mother's brain in response to stress may affect fetal brain development, particularly in early pregnancy.

SourceJAMA Network·JournalArchives of General Psychiatry·DateFeb 4, 2008

DNA (driver of nicotine addiction)

A genetic study of 14,000 people found two genes, alpha 3 and alpha 5 nicotinic receptor subunits, to be associated with an increased risk of heavy smoking. The implicated DNA variants can be used to predict ability to quit using existing medications, potentially leading to more efficient treatment.

SourceMolecular Psychiatry·JournalMolecular Psychiatry·DateJan 29, 2008