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Although telomere attrition is associated with the process of normal ageing, shorter telomere length (TL) has been associated with acute and chronic stressors. A neurobiological factor hypothesised to be responsible for this accelerated attrition is the dysregulation of the cortisol stress response, which can induce DNA damage affecting DNA telomeric caps. Marked sex differences are reported in both the cortisol stress response and telomere dynamics, yet no explicit investigation of sex specificity on the relationship between cortisol and TL exists. This study used mathematical equation modelling to describe the relationship between diurnal cortisol levels and telomere length within the context of sex, in a healthy population. Cortisol awakening responses (CAR) were measured via ELISA methodology in fifty‐one healthy participants (28 males, 23 females). qPCRs determined TL from genomic DNA extracted from saliva. To assess the effect of free cortisol on relative TL ratio, a semi‐log regression plot of the two variables trended for sex were fitted using spline curves. Results demonstrated significant differences between males and females in the relationship defining CAR and TL association (p = 0.03). These results suggest the relationship is not linear and can be represented as a complex arcsin function, and that the patterns are opposite in males and females. Males demonstrate a positive correlation, with higher levels of CAR being associated with longer telomere sequences. Females demonstrated a negative correlation. Future studies must carefully take into consideration moderating factors such as sex, and sex hormones across the lifespan when investigating telomere length. [ABSTRACT FROM AUTHOR]

Background: Psychosocial responses to infectious disease outbreaks have the potential to inflict acute and longstanding mental health consequences. Early research across the globe has found wide ranging psychological responses to the current COVID-19 pandemic. Understanding how different coping styles can be effective in mitigating mental ill health would enable better tailored psychological support. Aims: The aim of this study was to gain an understanding of psychosocial responses to the COVID-19 pandemic, including depression, anxiety and distress, as well as effective coping styles in an Australian sample. Method: A sample of 1,495 adults, residing in Australia between April 3rd and May 3rd 2020, completed an online survey which measured psychological distress (Impact of Events Scale-Revised), depression, anxiety, stress (DASS-21), as well as coping strategies (Brief COPE). Results: 47% of the respondents were experiencing some degree of psychological distress. Females experienced higher levels of depression, anxiety and stress than males. Coping strategies associated with better mental health were positive reframing, acceptance and humour. Conversely, self-blame, venting, behavioural disengagement and self-distraction were associated with poorer mental health. Conclusion: Rates of psychological symptoms amongst the Australian population are similar to those reported in other countries. Findings add to the growing literature demonstrating a gender disparity in the mental health impacts of COVID-19. Positive emotion focused coping strategies may be effective for reducing psychological symptoms. Understanding psychosocial responses including beneficial coping strategies are crucial to manage the current COVID-19 situation optimally, as well as to develop mental health response plans for future pandemics. [ABSTRACT FROM AUTHOR]

Background: Schizophrenia and bipolar disorder are complex mental illnesses that are associated with cognitive deficits. There is considerable cognitive heterogeneity that exists within both disorders. Studies that cluster schizophrenia and bipolar patients into subgroups based on their cognitive profile increasingly demonstrate that, relative to healthy controls, there is a severely compromised subgroup and a relatively intact subgroup. There is emerging evidence that telomere shortening, a marker of cellular senescence, may be associated with cognitive impairments. The aim of this study was to explore the relationship between cognitive subgroups in bipolar-schizophrenia spectrum disorders and telomere length against a healthy control sample., Methods: Participants included a transdiagnostic group diagnosed with bipolar, schizophrenia or schizoaffective disorder ( n = 73) and healthy controls ( n = 113). Cognitive clusters within the transdiagnostic patient group, were determined using K-means cluster analysis based on current cognitive functioning (MATRICS Consensus Cognitive Battery scores). Telomere length was determined using quantitative PCRs genomic DNA extracted from whole blood. Emergent clusters were then compared to the healthy control group on telomere length., Results: Two clusters emerged within the patient group that were deemed to reflect a relatively intact cognitive group and a cognitively impaired subgroup. Telomere length was significantly shorter in the severely impaired cognitive subgroup compared to the healthy control group., Conclusions: This study replicates previous findings of transdiagnostic cognitive subgroups and associates shorter telomere length with the severely impaired cognitive subgroup. These findings support emerging literature associating cognitive impairments in psychiatric disorders to accelerated cellular aging as indexed by telomere length.