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Objectives: To investigate differences in the incidence of enteropathy or intestinal malabsorption in patients taking angiotensin II receptor blockers (ARBs), angiotensin-converting enzyme inhibitor (ACEI), calcium channel blocker (CCB), and beta blockers (BBs) at a single center in Korea., Methods: In this retrospective study, we utilized data from the Yangsan electronic medical records to identify 129,169 patients. These individuals were prescribed olmesartan, other ARBs, ACEI, CCB, and BBs between November 2008 and February 2021., Results: Of the 44,775 patients, 51 (0.11%) were observed to have enteropathy or intestinal malabsorption. Compared with the ACEI group, the adjusted odds ratios (ORs) for enteropathy and intestinal malabsorption were OR=1.313 (95% confidence interval [CI]: [0.188-6.798], p =0.893) for olmesartan, OR=0.915 (95% CI: [0.525-1.595], p =0.754) for the other ARBs, OR=0.928 (95% CI: [0.200-4.307]; p =0.924) for the CCB, and OR=0.663 (95% CI: [0.151-2.906]; p =0.586) for the BBs group. These findings were adjusted for factors such as age, gender, duration of antihypertensive medication, and comorbidities., Conclusion: In a retrospective cohort study of patients on antihypertensive medications, no significant difference was found in the incidence of enteropathy or intestinal malabsorption when ACEI was compared to olmesartan, other ARBs, CCB, and BBs., (Copyright: © Saudi Medical Journal.)

Background: Considering the prolongation of the COVID-19 pandemic, the lack of studies on burnout, particularly in healthcare workers, needs to be addressed. This report aimed to identify the risk factors of burnout by comparing the level of burnout between nurses in general wards and those in COVID-19-dedicated wards in a national university hospital., Methods: A survey based on the Korean version of Burnout Assessment Tool (BAT-K) was conducted on nurses between 10 January and 31 January 2022. The BAT-K consists of exhaustion, mental distance, cognitive impairment, emotional impairment and secondary symptoms., Results: A total of 165 nurses, including 81 nurses from the COVID-19-dedicated ward, completed the questionnaire. The percentage of general-ward nurses with an emotional impairment score above the clinical cutoff was higher than that of COVID-19 ward nurses. General ward compared to the COVID-19 ward increased the risk of presenting with total-core symptoms. Two factors increased the risk regarding mental distance: short career length and underlying disease., Conclusions: In contrast to previous studies, the risk of burnout in the COVID-19-ward nurses was lower than that of the general ward nurses. The risk regarding mental distance was correlated with short career length and presence of an underlying disease., (© The Author(s) 2023. Published by Oxford University Press on behalf of Faculty of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)

Background: Studies suggest that Schisandra chinensis Baillon (Sc) may enhance muscle strength and mass because of its anti-inflammatory and antioxidant properties., Objectives: We aimed to examine the effects and safety of consumption of Sc extract (SCe) for 12 wk on muscle strength and mass in older adults with relatively low muscle mass who do low-intensity exercise., Methods: A randomized, double-blind, placebo-controlled trial was performed in adults >50 y of age. Fifty-four participants were randomly assigned into 2 groups and, for 12 wk, received either 1 g SCe/d or a placebo. All participants were required to walk for 30-60 min/d for >3 d/wk during the trial period. At baseline and at 4 and 12 wk after treatment, the participants were examined for knee extension strength using Biodex isokinetic dynamometers, handgrip strengths, and body composition, and blood tests were performed. The Euro-QoL-5D (EQ-5D) questionnaire and the FFQ were administered at baseline and at 12 wk after treatment. Physical activity was assessed using a self-recorded daily exercise log and an accelerometer during the study., Results: SCe supplementation over 12 wk caused a higher increase in right knee extensor strength by 10.2 Nm (95% CI: 3.7, 16.8 Nm; P = 0.003) and left knee extensor strength by 6.7 Nm (95% CI: 0.3, 13.1 Nm; P = 0.041) than did the placebo. However, no differences were observed in the muscle mass, anti-inflammatory markers, antioxidative markers, and EQ-5D score between the groups. None of the participants experienced adverse events., Conclusions: SCe supplementation may enhance skeletal muscle strength but not mass in older adults who perform low-intensity exercise. This trial was registered at clinicaltrials.gov as NCT03402308., (© The Author(s) 2021. Published by Oxford University Press on behalf of the American Society for Nutrition.)

Goals: This study sought to clarify sex differences in KRAS mutations and clinical predictors of KRAS 13 codon mutations., Background: Sex differences in KRAS mutations and predictors for KRAS codon 13 mutations in colorectal cancer (CRC) are unclear., Study: Between October 2007 and May 2016, 328 patients underwent surgery for CRCs that were analyzed for KRAS mutations at a referral university hospital. Sex differences in the rates and distributions of KRAS mutations, and factors predictive of overall KRAS and KRAS codon 13 mutations were analyzed., Results: KRAS mutations were significantly more common in women than men patients (46.0% vs. 34.4%, P<0.033). However, no sex differences were detected for KRAS mutations by codon subtypes (P=0.592). The Gly13Asp (GGC>GAC) point mutation was identified only within codon 13 in both sexes. For right-sided CRC, KRAS mutations were twice as frequent in men as in women (univariate analysis; P=0.016, multivariate analysis; P=0.019). High-plasma cholesterol level was an independent predictive factor of KRAS codon 13 mutations by univariate (odds ratio, 1.013; 95% confidence interval, 1.003-1.023) and multivariate analysis (odds ratio, 1.011; 95% confidence interval, 1.001-1.021)., Conclusions: Sex differences may affect the presentation of KRAS mutations, as they were more frequently detected in women and in right-sided CRC in men. KRAS codon 13 mutations were significantly associated with high-plasma cholesterol. Further studies are needed on the clinical implications of this finding.

We analyzed insulin-like growth factor receptor I (IGF-IR) and insulin growth factor binding protein-3 (IGFBP-3) expression with respect to overall survival and relapse-free survival (RFS) in 460 patients with primary invasive breast cancer using immunohistochemistry. IGF-IR expression had a significant positive correlation with positive estrogen receptor (ER), positive progesterone receptor (PR) and Bcl-2 expression. Univariate analysis showed significantly better overall survival (p=0.000) and RFS (p=0.004), in the IGF-IR-positive group. Multivariate analysis showed a significant reduction in relative risk for overall survival (p=0.019, HR=0.221, 95% CI=0.062-0.780) and RFS (p=0.026, HR=0.462, 95% CI=0.234-0.913) in the IGF-IR-positive group. IGF-IR expression in primary breast cancer is an independent favorable prognostic factor. IGFBP-3 expression in breast cancer is associated with poor outcome.

Transient grating spectroscopy detects directly the relaxation of the excited carriers rather than time-resolved photoluminescence and thus it is particularly desired for the indirect semiconductors such as silicon quantum dots. We investigate ultrafast carrier dynamics in silicon quantum dots embedded in silicon oxide matrix using femtosecond transient grating spectroscopy. Two ultrafast decay components are observed with decay time of 800 fs and 4 ps at various detection wavelengths, which are attributed to the transverse optical and transverse acoustic phonon assisted relaxation. Photoexcited electrons and holes are effectively trapped into the localized states on the surface of the silicon quantum dots where electrons and holes have a slow recombination in the time scale of microseconds.