Identification of volatile organic compounds in muscle tissues of different species based on Headspace-Gas-Chromatography Ion-Mobility spectrometry

Species identification of unknown biological samples is crucial for forensic applications, especially in cases of explosion, disaster accidents, and body mutilation after murdering, as well as poaching, illegal trade in endangered animals, and meat food fraud. In this study, we identified 60 volatile organic compounds (VOCs) in fresh skeletal muscle tissues of seven different animal species (cattle, sheep, pigs, rabbits, rats, chickens and carp) and a human dead body by headspace-gas-chromatography ion-mobility spectrometry (HS-GC-IMS), and compared their differences by retention time, drift time and molecular weight. The results showed that these VOCs formed different gallery plot fingerprints in the skeletal muscle tissues of the human dead body and seven animal species. Principal component analysis (PCA) showed significantly different fingerprints between these species, and these fingerprints maintained good stability between the species and within the same species. Some VOCs have high species specificity, while VOCs of human fresh muscle tissues from different individual sources have little difference, demonstrating that all tested muscle tissue samples could be distinguished based on different VOCs. HS-GC-IMS has proved to be a rapid, high-throughput, highly sensitive and specific species identification method, which can be used for forensic species identification in criminal cases and disaster accidents, as well as detection in the field of food safety, such as meat fraud and adulteration.     

Evaluation of a deep learning model on coronary CT angiography for automatic stenosis detection

PurposeThe purpose of this study was to evaluate a deep-learning model (DLM) for classifying coronary arteries on coronary computed tomography -angiography (CCTA) using the Coronary Artery Disease-Reporting and Data System (CAD-RADS).Materials and methodsThe DLM was trained with 10,800 curved multiplanar reformatted (cMPR) CCTA images classified by an expert radiologist using the CAD-RADS. For each of the three main coronary arteries, nine cMPR images 40° apart acquired around each arterial circumference were then classified by the DLM using the highest probability. For the validation set composed of 159 arteries from 53 consecutive patients, the images were read by two senior and two junior readers; consensus of the two seniors was the reference standard. With the DLM, the majority vote for the nine images was used to classify each artery. Three groups (CAD-RADS 0, 1–2, or 3–4–5) and 2 groups CAD-RADS 0–1–2 or 3–4–5 (<50% vs. ≥50% stenosis) were used for comparisons with readers and consensus. Performance of the model and readers was compared to the consensus reading using the intraclass coefficient (ICC) and Cohen's kappa coefficient at the artery and patient levels.ResultsWith the three groups at the artery level, the ICC of the DLM was 0.82 (95% CI: 0.75–0.88) and not significantly different from those of 3/4 readers; accuracy was 81%. With the binary classification, Cohen kappa coefficient of the DLM was 0.85 (95% CI: 0.69–0.94) and not significantly different from that of 3/4 readers; accuracy was 96%. At the patient level, sensitivity and specificity were 93% and 97% respectively, and the negative predictive value was 97%.ConclusionThe DLM detected ≥50% stenoses with performances similar to those achieved by senior radiologists.     

Targeting tissue-resident memory CD8+ T cells in the kidney is a potential therapeutic strategy to ameliorate podocyte injury and glomerulosclerosis

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Evaluation of 5-aminolevulinic acid-mediated photodynamic therapy in postmenopausal women with persistent HPV infection with or without cervical and vaginal low-grade squamous intraepithelial lesions (CIN1/VaIN1)

ObjectiveTo analyze the efficacy and safety of photodynamic therapy (PDT) on postmenopausal women with persistent human papillomavirus (HPV) infection with or without low-grade cervical and vaginal intraepithelial neoplasia (CIN1 and VaIN1).Materials and methodsThe clinicopathological and follow-up data of 86 postmenopausal women with HPV infection (35 cases with chronic cervicitis and 51 cases with CIN1/VaIN1) were collected. All the women in this group met these criteria: menopausal time ≥ 1 year, HPV infection time ≥ 2 years, colposcopy and pathological diagnosis of biopsy ≤ CIN1/VaIN1 before PDT treatment, and 5-aminolaevulinic acid (5-ALA) as photosensitizer treating for 6 times with a week interval. The above patients were followed up 6 months and 12 months after PDT treatment, and the follow-up contents included HPV typing, cytology, colposcopy and pathological examinations. HPV negative conversion rate and lesion remission rate are the evaluation indicators of treatment efficacy. In addition, we also assessed the safety of PDT treatment.ResultsAt 12-month follow-up, the overall HPV clearance rate was 60% (45/75), of which the negative conversion rate of 16/18 HPV was 41.38% (12/29), and non-16/18 HPV was 71.74% (33/46) (p = 0.009). In patients without lesions, the HPV clearance rate was 51.72% (15/29), while in patients with CIN1/VaIN1 (n = 46), the HPV complete remission rate and lesion regression rate were 65.22% (30/46) and 89.13% (41/46), respectively. In addition, the clearance rate of HPV in lesion regression group was significantly higher than that in lesion persistence/progression group (0.00% vs. 73.17%, p = 0.003). The adverse reactions after PDT treatment were mild, mainly manifested as increased vaginal secretions or burning/tingling.ConclusionsPhotodynamic therapy can significantly enhance the elimination rate of persistent HPV infection in postmenopausal women and reduce the progression of CIN1/VaIN1. It could be an effective conservative treatment for persistent HPV infection and CIN1/VaIN1 in postmenopausal women.     

An epidemiologic study of sleep-disordered breathing in a large sample of Chinese adolescents

Journal of Public Health - Sleep-disordered breathing (SDB) is common among adolescents and is associated with short- and long-term consequences. Data on the prevalence and epidemiologic...     

国内外不孕不育患者健康相关生命质量量表的系统综述与评价研究

背景 健康相关生命质量（HRQoL）是用于评价临床疗效的重要指标。目前，不孕不育患者HRQoL量表得到了广泛应用，但尚不确定这些量表应用于临床时是否具有良好的测量性能，缺乏对量表的质量评价。 目的 系统综述与评价不孕不育患者HRQoL量表，为合理选择健康结果测量工具提供参考。 方法 于2020年10月，计算机检索PubMed、Web of Science、the Cochrane Library、EmBase、中国知网、万方数据知识服务平台、维普中文科技期刊全文数据库和中国生物医学文献数据库，获取国内外公开发表的有关不孕不育患者HRQoL的研究，检索时限均为建库至2020-10-05。由两名研究者独立筛选文献和提取资料后，采用健康测量工具遴选标准（COSMIN）对不孕不育患者HRQoL特异性量表开发研究的方法学质量，以及量表的测量性能进行评价，采用描述分析法对评价结果进行汇总、分析。 结果 共纳入229篇文献，涉及19个不孕不育患者HRQoL量表，其中4个为不孕不育患者HRQoL特异性量表〔TLMK、生育生活质量量表（FertiQoL）、QOLICQ及中医肝郁型不孕症生命质量量表〕，4个为用于测评癌症及其他疾病患者HRQoL的特异性量表，11个为普适性HRQoL量表，FertiQoL量表在现有不孕不育患者HRQoL相关研究中被使用的频次最高〔39.1%（91/233）〕。PROMs开发方面，除FertiQoL量表开发的总体质量为"有问题的"外，其余3个量表开发的总体质量均为"不合格"。内容效度方面，FertiQoL、QOLICQ量表开发研究的方法学质量分别为"非常好""有问题的"，TLMK、中医肝郁型不孕症生命质量量表开发研究的方法学质量均为"合格"。结构效度方面，除QOLICQ量表开发研究方法学质量为"有问题的"外，其余3个量表开发研究的方法学质量为"合格"；4个量表的结构效度均为"不确定"。内部一致性方面，4个量表开发研究的方法学质量均为"非常好"，4个量表的内部一致性均为"足够"。重测信度方面，QOLICQ量表开发研究的方法学质量为"有问题的"，量表的重测信度为"不确定"。效标效度方面，中医肝郁型不孕症生命质量量表开发研究的方法学质量为"非常好"，量表的效标效度为"足够"。建构效度方面，TLMK量表开发研究的方法学质量为"非常好"，量表的建构效度为"足够"。反应度/灵敏度方面，FertiQoL量表开发研究的方法学质量为"非常好"，量表的反应度/灵敏度为"足够"。 结论 现存的不孕不育患者HRQoL特异性量表中，FertiQoL量表开发研究的方法学质量及量表的测量性能相对较高。中国不孕不育患者HRQoL特异性量表研究数量相对不足，未来应开展更多的研究。     

The key role of macrophage depolarization in the treatment of COPD with ergosterol both in vitro and in vivo

Macrophages are the most abundant immune cells in the lung, which play an important role in COPD. The anti-inflammatory and anti-oxidation of ergosterol are well documented. However, the effect of ergosterol on macrophage polarization has not been studied. The objective of this work was to investigate the effect of ergosterol on macrophage polarization in CSE-induced RAW264.7 cells and Sprague-Dawley (SD) rats COPD model. Our results demonstrate that CSE-induced macrophages tend to the M1 polarization via increasing ROS, IL-6 and TNF-α, as well as increasing MMP-9 to destroy the lung construction in both RAW264.7 cells and SD rats. However, treatment of RAW264.7 cells and SD rats with ergosterol inhibited CSE-induced inflammatory by decreasing ROS, IL-6 and TNF-α, and increasing IL-10 and TGF-β, shuffling the dynamic polarization of macrophages from M1 to M2 both in vitro and in vivo. Ergosterol also decreased the expression of M1 marker CD40, while increased that of M2 marker CD163. Moreover, ergosterol improved the lung characters in rats by decreasing MMP-9. Furthermore, ergosterol elevated HDAC3 activation and suppressed P300/CBP and PCAF activation as well as acetyl NF-κB/p65 and IKKβ, demonstrating that HDAC3 deacetylation was involved in the effect of ergosterol on macrophage polarization. These results also provide a proof in immunoregulation of ergosterol for therapeutic effects of cultured C. sinensis on COPD patients.     

监测数据统计分析模型在生态学研究中的应用

近年来，环境监测、疾病监测等各种监测网络不断健全，监测系统成为开展生态学研究的重要数据来源。监测数据类型包括了横断面数据、时间序列数据和面板数据，涉及暴露、结局和混杂3个维度。针对该数据的信息属性和结构特点，相关统计学方法逐渐发展完善，出现了一些新的方法、模型。基于数据的时空属性，本文对监测数据在生态学研究中常用模型的原理、适用条件及优劣进行了综述。     

Quality of life in caregivers of a family member with serious mental illness: Evidence from China

Purpose

To evaluate the quality of life (QoL) and social support among family caregivers of a family member with a mental illness and to identify factors associated with the QoL.