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Cells can, in principle, control their size by growing to a specified size before commencing cell division. How any cell actually senses its own size remains poorly understood. The fission yeast Schizosaccharomyces pombe are rod-shaped cells that grow to ∼14 µm in length before entering mitosis. In this study, we provide evidence that these cells sense their surface area as part of this size control mechanism. We show that cells enter mitosis at a certain surface area, as opposed to a certain volume or length. A peripheral membrane protein kinase cdr2p has properties of a dose-dependent ‘sizer’ that controls mitotic entry. As cells grow, the local cdr2p concentration in nodes at the medial cortex accumulates as a measure of cell surface area. Our findings, which challenge a previously proposed pom1p gradient model, lead to a new model in which cells sense their size by using cdr2p to probe the surface area over the whole cell and relay this information to the medial cortex.

The antagonistic pleiotropy theory of aging proposes that aging takes place because natural selection favors genes that confer benefit early on life at the cost of deterioration later in life. This theory predicts that genes that impact development would play a key role in shaping adult lifespan. To better understand the link between development and adult lifespan, we examined the genes previously known to be essential for development. From a pool of 57 genes that cause developmental arrest after inhibition using RNA interference, we have identified 24 genes that extend lifespan in Caenorhabditis elegans when inactivated during adulthood. Many of these genes are involved in regulation of mRNA translation and mitochondrial functions. Genetic epistasis experiments indicate that the mechanisms of lifespan extension by inactivating the identified genes may be different from those of the insulin/insulin-like growth factor 1 (IGF-1) and dietary restriction pathways. Inhibition of many of these genes also results in increased stress resistance and decreased fecundity, suggesting that they may mediate the trade-offs between somatic maintenance and reproduction. We have isolated novel lifespan-extension genes, which may help understand the intrinsic link between organism development and adult lifespan. [ABSTRACT FROM AUTHOR]

Background: A well-documented association exists between higher surgeon volumes and better outcomes for many procedures, but surgeons may be reluctant to change practice patterns without objective, credible, and near real-time data on their performance. In addition, published thresholds for procedure volumes may be biased or perceived as arbitrary; typical reports compare surgeons grouped into discrete procedure volume categories, even though the volume-outcomes relationship is likely continuous., Methods: The concentration curves methodology, which has been used to analyze whether health outcomes vary with socioeconomic status, was adapted to explore the association between procedure volume and outcomes as a continuous relationship so that data for all surgeons within a health care organization could be included. Using widely available software and requiring minimal analytic expertise, this approach plots cumulative percentages of two variables of interest against each other and assesses the characteristics of the resulting curve. Organization-specific relationships between surgeon volumes and outcomes were examined for three example types of procedures: uncomplicated hysterectomies, infant circumcisions, and total thyroidectomies. The concentration index was used to assess whether outcomes were equally distributed unrelated to volumes., Results: For all three procedures, the concentration curve methodology identified associations between surgeon procedure volumes and selected outcomes that were specific to the organization. The concentration indices confirmed the higher prevalence of examined outcomes among low-volume surgeons. The curves supported organizational discussions about surgical quality., Conclusion: Concentration curves require minimal resources to identify organization- and procedure-specific relationships between surgeon procedure volumes and outcomes and can support quality improvement., (Copyright © 2018 The Joint Commission. Published by Elsevier Inc. All rights reserved.)

This article reports on the impact of the Savvy Caregiver Program (SCP) on English-speaking caregivers of Hispanic, Black/African American, and Asian/Pacific Islander descent. Caregivers completed a questionnaire prior to study enrollment, at 6 and 12 months postenrollment. Caregivers in all 3 ethnic groups showed more caregiver competence, reduced depression, greater tolerance for care recipients' memory problems, better management of their overall situation, and improved perception of that situation 6 months and 12 months post-enrollment. The study demonstrates that in the sample studied the SCP was as effective in helping ethnically diverse caregivers as it has shown to be with Caucasian caregivers.

This study presents the results of the work of the Asian Pacific Islander Dementia Care Network (APIDCN)--a collaborative model of care created to develop community capacity to deliver dementia capable services, build community awareness about Alzheimer's disease and other dementias, and offer direct services to caregivers in the API community in Los Angeles. Through trainings, mentoring, and outreach campaigns, the APIDCN expanded the availability of culturally competent services in the API community. The knowledge that was embedded within partner organizations and in the community at large assures sustainability of the services after the project ended.

The aim of this study was to present a detailed profile of 50 women eating disorder (ED) inpatients who reported first ED onset at age 40 or above. We assessed patients' sociodemographics, severity-of-illness, comorbid diagnoses, personality profiles, and short-term treatment outcomes. Compared to patients of more traditional young adult ages, results revealed unique features of midlife-onset ED inpatients, including less severe and less common self-reported ED symptomology measured by the EDI-2; a predominance of pure restricting behaviors and rarity of bulimia; similar rates of co-occurring depression and anxiety but of less severity; fewer substance use disorders with a predominance of sedating/calming substance usage; many fewer Cluster C diagnoses on Axis II; substantially greater histories of sexual abuse; and different MMPI-2 profiles emphasizing much greater denial. The corresponding needs among midlife-onset ED inpatients for specialized assessment and treatment interventions are considered.

We analyzed the influence of co-occurring obsessive-compulsive disorder (OCD) on response to eating disorder (ED) treatment among 2,971 female inpatients. We assessed treatment response using Eating Disorder Inventory-2 and DSM-IV ED criteria. Multivariate analyses included sociodemographics, illness severity, and co-occurring Axis I/II diagnoses. ED inpatients with OCD had greater ED severity than those without OCD. However, no differences occurred in short- and intermediate-term ED outcomes. Patients with and without OCD evidenced the same degree of change in EDI-2 scores admission-to-discharge and discharge-to-one-year; and 93% of patients both with and without OCD no longer evidenced a DSM-IV ED diagnosis one-year post-discharge. Results suggest that with co-occurring OCD treated using evidence-based interventions ED inpatients with and without OCD may have similar prognoses.