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Circulating myeloid-derived MMP8 in stress susceptibility and depression

Psychosocial stress has profound effects on the body, including the immune system and the brain1,2. Although a large number of pre-clinical and clinical studies have linked peripheral immune system alterations to stress-related disorders such as major depressive disorder (MDD)3, the underlying mechanisms are not well understood. Here we show that expression of a circulating myeloid cell-specific proteinase, matrix metalloproteinase 8 (MMP8), is increased in the serum of humans with MDD as well as in stress-susceptible mice following chronic social defeat stress (CSDS). In mice, we show that this increase leads to alterations in extracellular space and neurophysiological changes in the nucleus accumbens (NAc), as well as altered social behaviour. Using a combination of mass cytometry and single-cell RNA sequencing, we performed high-dimensional phenotyping of immune cells in circulation and in the brain and demonstrate that peripheral monocytes are strongly af ....

United States , South Korea , Lookeren Campagne , Brunstein Klomek , J Health Soc , Research Version American Psychiatric Association , Psychiatry Rep , Cancer Biol , Open Sci , Growth Factor Rev , Cell Biol , Structured Clinical Interview , American Psychiatric Association ,

How to Treat: Anorexia nervosa in young people

Since the onset of the COVID-19 pandemic, rates of eating disorders, particularly anorexia nervosa, have dramatically increased both in New Zealand and overseas. Young people with anorexia are most likely to present to primary care services. In this article, Hiran Thabrew offers new ideas for supporting this group of young people during the COVID-19 era ....

New Zealand , United States , Le Grange , El Ghoch , Rau Hinengaro , American Psychiatric Association , Victoria University Of Wellington , Rangatahi Smart , Zealand Mental Health , Research Group , Access To Health Services , Zealand College Of Psychiatrists , University Of Auckland , Statistical Manual , Mental Disorders , New Zealand Mental Health , Austn Zj Psychiatry , Medj Aust , Smart Survey , Initial Findings , Victoria University , Gen Psychiatry , Psychiatry Rep , New Zealand College ,