Stress and distress in parents of neonates admitted to the neonatal intensive care unit for cardiac surgery.

BACKGROUND: Parents of infants admitted to the Neonatal Intensive Care Unit (NICU) are at risk of psychological distress and NICU-related stress. However, parents of infants admitted to NICU for cardiac surgery are an under-researched population. AIMS: Identify levels of NICU-related stress, and levels of psychological distress, reported by parents of infants admitted to the NICU for cardiac surgery. STUDY DESIGN: Observational study. SUBJECTS: 69 parents of infants admitted to the NICU for cardiac surgery (cardiac group) and 142 parents of healthy infants (control group). OUTCOME MEASURES: Questionnaire packs provided to parents prior to discharge (time-point 1), and at six and 12months corrected age included: Hospital Anxiety and Depression Scale, Coping Inventory for Stressful Situations, and Family Support Scale. The Parental Stressor Scale:NICU was administered to the cardiac group at time-point 1. RESULTS: The cardiac group reported (i) that parental role alteration was the most stressful aspect of the NICU and (ii) higher scores for anxiety and depression than the control group at all three time-points, with the highest levels reported during the NICU stay. Correlation analyses indicated (i) stress associated with the sights and sounds of the NICU, and the appearance and behaviour of the infant in the NICU, had a significant positive association with anxiety and depression, and (ii) a significant negative relationship between anxiety and task-focused coping. CONCLUSIONS: An individualised parent-targeted intervention aimed at reducing stress associated with the NICU and enhancing task-focused coping style may help to reduce levels of anxiety and depression within this group of parents.

Mcl-1 is a key regulator of the ovarian reserve.

A majority of ovarian follicles are lost to natural death, but the disruption of factors involved in maintenance of the oocyte pool results in a further untimely follicular depletion known as premature ovarian failure. The anti-apoptotic B-cell lymphoma 2 (Bcl-2) family member myeloid cell leukemia-1 (MCL-1) has a pro-survival role in various cell types; however, its contribution to oocyte survival is unconfirmed. We present a phenotypic characterization of oocytes deficient in Mcl-1, and establish its role in maintenance of the primordial follicle (PMF) pool, growing oocyte survival and oocyte quality. Mcl-1 depletion resulted in the premature exhaustion of the ovarian reserve, characterized by early PMF loss because of activation of apoptosis. The increasingly diminished surviving cohort of growing oocytes displayed elevated markers of autophagy and mitochondrial dysfunction. Mcl-1-deficient ovulated oocytes demonstrated an increased susceptibility to cellular fragmentation with activation of the apoptotic cascade. Concomitant deletion of the pro-apoptotic Bcl-2 member Bcl-2-associated X protein (Bax) rescued the PMF phenotype and ovulated oocyte death, but did not prevent the mitochondrial dysfunction associated with Mcl-1 deficiency and could not rescue long-term breeding performance. We thus recognize MCL-1 as the essential survival factor required for conservation of the postnatal PMF pool, growing follicle survival and effective oocyte mitochondrial function.