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BACKGROUND The shape and function of the longitudinal muscular column (LMC) of the prostate have not been established in detail. The present study was undertaken to elucidate the roles of the LMC of the posterior wall of the prostatic urethra (PSU) in the emission phase of ejaculation by investigating the form and muscular arrangement of the LMC. METHODS Prostates and urinary bladders were obtained from 14 Korean adult cadavers. Nine specimens were histologically analyzed using hematoxylin and eosin, Masson's trichrome, and Verhoeff-van Gieson staining. Two specimens were scanned using microcomputed tomography (micro-CT), and all scanned images were reconstructed into a three-dimensional model. RESULTS At the proximal level of the prostate, the ejaculatory ducts (EDs) and prostatic utricle (PU) together were surrounded by circular smooth-muscle fibers. However, at the seminal colliculus (SC) where the EDs and PU opened, they were mainly surrounded by an abundance of longitudinal fibers. The longitudinal fibers posterior to the EDs and PU formed a distinctive LMC in the posterior urethral wall. In histologic sections and micro-CT images, the LMC extended distally from the level of the SC to the level of the membranous urethra (MBU). We simulated a potential mechanism of LMC using a mathematical model of its movements. CONCLUSIONS Comprehensive analyses based on in-depth assessment of histologic characteristics and micro-CT images demonstrated extension of the LMC from the level of the SC to the level of the MBU, enabling a better understanding of ejaculation physiology involving the LMC. These results suggest that the LMC in the posterior wall of the PSU is a critical component of ejaculation by facilitating the ejection of seminal vesicle fluid into the PSU via well-coordinated contractions. © 2020 Wiley Periodicals, Inc.The hydroxylation of non-reactive C-H bonds can be easily catalyzed by a variety of metalloenzymes, especially cytochromes P450 (P450s). The mechanism of P450 mediated hydroxylation has been intensively studied, both experimentally and theoretically. However, understanding the regio- and stereoselectivities of substrates hydroxylated by P450s remains a great challenge. Here, we use a multi-scale modeling approach to investigate the selectivity of testosterone (TES) and dihydrotestosterone (DHT) hydroxylation catalyzed by two important P450s, CYP3A4 and CYP19A1. For CYP3A4, two distinct binding modes for TES/DHT were predicted by dockings and molecular dynamics simulations, in which the experimentally identified sites of metabolism of TES/DHT can access to the catalytic center. The regio- and stereoselectivities of TES/DHT hydroxylation were further evaluated by quantum mechanical and ONIOM calculations. For CYP19A1, we found that sites 1β, 2β and 19 can access to the catalytic center, with the intrinsic reactivity 2β > 1β > 19. However, our ONIOM calculation results indicate that the hydroxylation is favored at site 19 for both TES and DHT, which is in agreement with the experiments and reflects the importance of the catalytic environment in determining the selectivity. Our study unravels the mechanism underlying the selectivity of TES/DHT hydroxylation mediated by CYP3A4 and CYP19A1 and is helpful for understanding the selectivity of other substrates hydroxylated by P450s. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.A 10-day-old infant was evaluated for heart failure and differential cyanosis. Type A interrupted aortic arch with duct-dependent lower body circulation was identified. There was associated type 2 aortopulmonary window which led to a "Valentine on a crab" appearance on echocardiography. Pattern recognition in imaging is useful for early identification of anomalies and for triaging appropriate evaluation and management. © 2020 Wiley Periodicals, Inc.Ichthyosis hystrix, Curth-Macklin type (IHCM) is an extremely rare autosomal dominant dermatosis caused by mutations in KRT1 or KRT10, that often manifests as extensive, dark, spiky or verrucous plaques and severe palmoplantar keratoderma. We found a novel frameshift trucation mutation c.1596_1597insAT, p. Gly533Metfs*82 in exon7 (V2 tail domian) of KRT1, which replacing the glycine-serine-rich tail of KRT1 with the alanine-rich 75 amino acids, developed a mild IHCM phenotype. FPS-ZM1 price The patient presented with localized ichthyosis and progressive hyperkeratosis of the palms and soles with no blister history. This article is protected by copyright. All rights reserved.OBJECTIVES This study investigated the frequency of traumatic experiences, prevalence rates of ICD-11 post-traumatic stress disorder (PTSD) and complex PTSD (CPTSD), and overlap with ICD-10 classified disorders in outpatient psychiatry. METHOD Overall, 165 Danish psychiatric outpatients answered the International Trauma Questionnaire, the Life Event Checklist, and the World Health Organization Well-being Index. ICD-10 diagnoses were extracted from the hospital record. Chi-square analysis, t-tests, and conditional probability analysis were used for statistical analysis. RESULTS Nearly, all patients (94%) had experienced at least one traumatic event. CPTSD (36%) was more common than PTSD (8%) and had considerable overlap with ICD-10 affective, anxiety, PTSD, personality, adjustment and stress-reaction disorders, and behavioural and emotional disorders with onset usually occurring in childhood and adolescence. ICD-11 PTSD overlapped with ICD-10 anxiety, PTSD, adjustment and stress-reaction disorders, and behavioural and emotional disorders with onset usually occurring in childhood and adolescence. A subgroup of patients with ICD-10 PTSD (23%) did not meet criteria for ICD-11 PTSD or CPTSD. CONCLUSION Traumatic experiences are common. ICD-11 CPTSD is a highly prevalent disorder in psychiatric outpatients. One quarter with ICD-10 PTSD did not meet criteria for either ICD-11 PTSD or CPTSD. PTSD and CPTSD had considerable overlap with ICD-10 disorders. © 2020 The Authors. Acta Psychiatrica Scandinavica published by John Wiley & Sons Ltd.This study explores the functional motivations of volunteers in youth mentoring programs and tests the validity of the Volunteer Functions Inventory (VFI) for this population. Participants included 473 volunteer mentors matched within a one-to-one mentoring program. The study utilizes a mixed-methods approach to validate the VFI, which was administered before the match. Exploratory and confirmatory factor analyses were employed to test for content validity and determine fit. These were complemented by an emergent theme analysis from a semi-structured interview, which included questions assessing mentor motivations. Findings suggest a five-factor structure model best captures functional motivations. In addition, results from the qualitative analysis suggest there may be previously unexplored domains to consider for contemporary volunteer populations. These include community/civic responsibility, organizational structure and reputation, and self-concept. Future research should seek to refine scales that are uniquely predictive of mentor motivations to expand practical applications for use.
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