Association of salivary-assessed oxytocin and cortisol levels with time of night and sleep stage

There have been proposals for REM to have a function of emotional memory consolidation, and also for REM sleep to be involved in the promotion of attachment behaviour. The hormones cortisol and oxytocin, respectively, may be involved in these proposed REM sleep functions. However, there are conflicting reports on whether levels of cortisol differ between sleep stages when time since sleep onset (SSO) is controlled, and virtually no literature on whether levels of oxytocin differ between sleep stages. This study thus investigated the changes in levels of oxytocin (OT) and cortisol (CT) across the night, and whether these levels differ between REM and N2 sleep when time SSO is controlled. 20 participants (10 males, 10 females, mean age?=?20.45, SD?=?2.01) were awakened 10?min into REM and N2 sleep periods in the sleep laboratory and gave saliva samples which were assayed for OT and CT. Levels of OT were relatively constant across the night, whereas CT increased significantly. REM and N2 did not differ significantly neither for OT nor for CT. The study has implications for models of sleep-dependent memory consolidation that incorporate the late sleep increase in cortisol as a functional component of memory consolidation, and also for the medical diagnostic assaying of OT during sleep.     

“You feel you have to be made of steel”: The strong Black woman,health, and well-being in Nova Scotia

The “strong Black woman” construct has been well-documented in the United States as both an aspirational icon and a constricting burden for African-heritage women. It has not been examined among African-Canadians. Drawing on qualitative interviews and standardized measures with 50 African-heritage women in Eastern Canada, our analysis reveals their perceptions of the construct as both strongly endorsed as a source of cultural pride, yet also acknowledged to take a terrible toll on health and well-being. The construct arises from and directly benefits racism. It is imperative that health professionals understand the ways it shapes health and help-seeking behaviors.     

Dominant ARL3-related retinitis pigmentosa

Purpose: To clinically and genetically characterise a second family with dominant ARL3-related retinitis pigmentosa due to a specific ARL3 missense variant, p.(Tyr90Cys).

Methods: Clinical examination included optical coherence tomography, electroretinography, and ultra-wide field retinal imaging with autofluorescence. Retrospective data were collected from the registry of inherited retinal diseases at Oslo university hospital. DNA was analysed by whole-exome sequencing and Sanger sequencing. The ARL3 missense variant was visualized in a 3D-protein structure.

Results: The phenotype was non-syndromic retinitis pigmentosa with cataract associated with early onset of decreased central vision and central retinal thinning. Sanger sequencing confirmed the presence of a de novo ARL3 missense variant p.(Tyr90Cys) in the index patient and his affected son. We did not find any other cases with rare ARL3 variants in a cohort of 431 patients with retinitis pigmentosa-like disease. By visualizing Tyr90 in the 3D protein structure, it seems to play an important role in packing of the α/β structure of ADP-ribosylation factor-like 3 (ARL3). When changing Tyr90 to cysteine, we observe a loss of interactions in the core of the α/β structure that is likely to affect folding and stability of ARL3.

Conclusion: Our study confirms that the ARL3 missense variant p.(Tyr90Cys) causes retinitis pigmentosa. In 2016, Strom et al. reported the exact same variant in a mother and two children with RP, labelled ?RP83 in the OMIM database. Now the questionmark can be removed, and ARL3 should be added to the list of genes that may cause non-syndromic dominant retinitis pigmentosa.     

Bispecific antibody based therapeutics: Strengths and challenges

Monoclonal antibody-based targeted therapy has greatly improved treatment options for patients. However, long-term efficacy of such antibodies is limited by resistance mechanisms. New insights into the mechanisms by which tumors evade immune control have driven innovative therapeutic strategies to eliminate cancer by re-directing immune cells to tumors. Advances in protein engineering technology have generated multiple bispecific antibody (BsAb) formats capable of targeting multiple antigens as a single agent. Approval of two BsAb and three check point blocking mAbs represent a paradigm shift in the use of antibody constructs. Since BsAbs can directly target immune cells to tumors, drug resistance and severe adverse effects are much reduced. The wave of next generation “bispecific or multispecific antibodies” has advanced multiple candidates into ongoing clinical trials. In this review, we focus on preclinical and clinical studies in hematological malignancies as well as discuss reasons for the limited success of BsAbs against solid tumors.     

The use of formal and informal knowledge sources in patients’ treatment decisions in secondary stroke prevention: qualitative study

Background There is robust empirical evidence to support clinical decision making in secondary stroke prevention after transient ischaemic attack (TIA) or recovered stroke. However, little attention has been paid to patients’ utilization of this evidence in coming to decisions about their treatment choices. Objective To examine the use of formal and informal knowledge by patients in making decisions about carotid endarterectomy (CEA) and medical treatment after TIA/recovered stroke. Setting and participants Twenty participants were recruited from an outpatient vascular surgical assessment clinic in England. Ten were receiving medical treatment alone, and 10 were undergoing CEA after TIA or recovered stroke. Method Twenty‐eight in‐depth qualitative interviews were conducted. An iterative approach was used whereby emergent themes were further explored in later interviews. Interviews were audiotaped, transcribed and coded. Results Participants gathered and utilized several types of knowledge in the process of making treatment decisions: Empirical knowledge (e.g. clinical trial findings); Pathophysiologic findings (e.g. results of clinical investigations); Experiential knowledge (e.g. personal experience of stroke); Goals and values (e.g. potential impact on family); System features (e.g. apparent urgency of treatment). Conclusions In addition to formal evidence, patients use other sources of informal or ‘non‐evidentiary’ knowledge to support their decisions about treatment after TIA or recovered stroke. To enable evidence‐based patient choice, health professionals need to appreciate the diverse types of evidence which patients use, to help them to access relevant and high‐quality evidence, to balance evidence from different sources and to make choices which are congruent with their values and expectations.     

Comparing midwife-led and doctor-led maternity care: a systematic review of reviews

sutcliffe k., caird j., kavanagh j., rees r., oliver k., dickson k., woodman j., barnett-paIge e. & thomas j. (2012)?Comparing midwife-led and doctor-led maternity care: a systematic review of reviews. Journal of Advanced Nursing68(11), 2376-2386. ABSTRACT: Aims. A report of a systematic review of reviews which examines the impact of having midwives-led maternity care for low-risk women, rather than physicians. Background. A rising birth rate, increasing complexity of births, and economic constraints pose difficulties for maternity services in the UK. Evidence about the most effective, cost-effective, and efficient ways to give maternity services is needed. Data sources. Searches were carried out in August-September 2009 of ten electronic databases, 16 key nursing and research websites, and reference lists of 56 relevant reviews. We also contacted 38 experts for information. No date restrictions were employed. Review methods. A narrative review of systematic reviews or 'meta review' was conducted using transparent and systematic procedures to limit bias at all stages. Systematic reviews that compared midwife-led care during pregnancy and birth with physician-led care were eligible for inclusion. Results. Three meta-analytic reviews were included. Midwife-led care for low-risk women was found to be better for a range of maternal outcomes, reduced the number of procedures in labour, and increased satisfaction with care. For some maternal, foetal, and neonatal outcomes reviews found no evidence that care led by midwives is different to that led by physicians. No adverse outcomes associated with midwife-led care were identified. Conclusions. For low-risk women, health and other benefits can result from having their maternity care led by midwives rather than physicians. Moreover, there appear to be no negative impacts on mothers and infants receiving midwife-led care.