A pilot study of genipin cross-linking effects on bullous keratopathy in rabbits

目的:评价京尼平交联治疗兔大泡性角膜病变的效果.方法:将已建立大泡性角膜病变动物模型的9只雌性新西兰白兔随机分为3组:治疗组(n=3),对照组(n=3),空白对照组(n=3).其中治疗组:刮除角膜上皮后,应用0.25%的京尼平浸泡实验眼角膜40min(24℃);对照组:刮除角膜上皮后,应用生理盐水浸泡实验眼角膜40min(24℃);空白对照组:不进行任何处理.处理后2wk内进行以下检查:裂隙灯检查、中央角膜厚度(CCT)测量、体质量和应激反应评估、组织学检查和利用原位末端转移酶标记技术(TUNEL法)检测基质层细胞凋亡.结果:与对照组和空白对照组相比,治疗组角膜水肿明显减轻、角膜上皮逐渐修复完整、角膜大泡消失、中央角膜角膜厚度显著下降(P<0.05)、体质量显著增加(P<0.05).治疗组的实验动物活动性较处理前增加,反抗行为减少,攻击性减低.治疗组角膜基质层胶原纤维排列更为紧致、规则,可见蓝色条索状交联产物.治疗组角膜基质层均偶见凋亡细胞,对照组及空白对照组未明显见凋亡细胞.结论:京尼平交联治疗可使兔大泡性角膜病变角膜水肿减轻,疼痛症状缓解,其可能的机制为京尼平交联使角膜基质层胶原纤维排列紧密,从而阻止角膜水肿和大泡的形成.     

Haploidentical hematopoietic stem cell transplantation may improve long-term survival for children with high-risk T-cell acute lymphoblastic leukemia in first complete remission

Background: The role of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in children with high-risk (HR) T-cell acute lymphoblastic leukemia (T-ALL) in first complete remission (CR1) is still under evaluation. Moreover, relapse is the main factor affecting survival. This study aimed to explore the effect of allo-HSCT (especially haploidentical HSCT [haplo-HSCT]) on improving survival and reducing relapse for HR childhood T-ALL in CR1 and the prognostic factors of childhood T-ALL in...     

rTMS及CBT-I对慢性失眠障碍患者治疗效果的随机对照研究

背景 目前,药物疗法是失眠障碍的一线治疗手段,但仍然存在着一定的不良反应。与药物治疗相比,重复经颅磁刺激（rTMS）和失眠的认知行为治疗（CBT-I）的不良反应较少、患者耐受性较好。目的 探讨rTMS与CBT-I治疗慢性失眠障碍的效果,以期为慢性失眠障碍患者提供更优的治疗方案。方法 选取2020年9月21日—2021年12月16日在内蒙古自治区精神卫生中心门诊或社区医院就诊的、符合《国际睡眠障碍分类第三版》（ICSD-3）诊断标准的慢性失眠障碍患者（n=50）,同期在社区招募与患者组年龄和性别相匹配的健康人作为对照组（n=16）。采用随机数字表法将慢性失眠障碍患者分为rTMS组与CBT-I组各25例,分别接受为期6周的rTMS或CBT-I干预。于干预前和干预后,慢性失眠障碍患者接受多导睡眠监测（PSG）以及匹兹堡睡眠质量指数量表（PSQI）、失眠严重程度指数量表（ISI）、重复性成套神经心理状态测验（RBANS）评定。对患者组和对照组进行静息态磁共振成像（rs-fMRI）扫描,并进行静息态低频振幅（ALFF）分析。将患者组和对照组ALFF值差异有统计学意义的脑区作为感兴趣区域（ROI）,将其作为种子点与患者全脑进行功能连接分析。结果 rTMS组和CBT-I组的PSQI评分、ISI评分以及RBANS中的即刻记忆、言语功能、延时记忆维度评分的时间效应均有统计学意义（F=41.160、69.615、47.923、12.090、28.193,P均<0.05）;两组总睡眠时间的时间效应、睡眠效率的时间效应和组别效应以及N1%的时间效应均有统计学意义（F=8.995、12.414、4.342、7.806,P均<0.05）。干预后,CBT-I组睡眠效率高于干预前（t=-2.785,P<0.05）。rTMS组眶部额上回与左侧豆状壳核（t=4.991,P<0.05）、右内侧和旁扣带回（t=4.471,P<0.05）和右侧中央后回（t=4.922,P<0.05）之间的功能连接增强,CBT-I组眶部额上回与左侧额中回之间的功能连接增强（t=6.586,P<0.05）。结论 rTMS及CBT-I可能有助于改善慢性失眠障碍患者的失眠情况和认知功能。     

GOS Ameliorates Nonalcoholic Fatty Liver Disease Induced by High Fat and High Sugar Diet through Lipid Metabolism and Intestinal Microbes

The treatment of nonalcoholic fatty liver disease (NAFLD) remains very challenging. This study investigated the therapeutic effect of galactose oligosaccharide (GOS), an important prebiotic, on NAFLD through in vivo and in vitro experiments and preliminarily explored the mechanism by which GOS improves liver lipid metabolism and inflammation through liver and intestinal microbiological analysis. The results of mouse liver lipidomics showed that GOS could promote body thermogenesis in mice with high-fat and high-sugar diet (HFHSD)-induced NAFLD, regulate lipolysis in liver fat cells, and accelerate glycine and cholesterol metabolism. GOS dose-dependently reduced the contents of total cholesterol (TC) and triglyceride (TG) in cells and reduced the accumulation of lipid droplets in cells. GOS also reduced the Firmicutes/Bacteroidetes ratio and altered the composition of the intestinal microbiota in mice fed a HFHSD. GOS can improve liver lipid metabolism and intestinal structure of NAFLD. These results provide a theoretical and experimental basis supporting the use of GOS as a health food with anti-NAFLD functions.     

Impact of Freeze–Thaw Cycles on the Long-Term Performance of Concrete Pavement and Related Improvement Measures: A Review

Freeze–thaw damage is one of the most severe threats to the long-term performance of concrete pavement in cold regions. Currently, the freeze–thaw deterioration mechanism of concrete pavement has not been fully understood. This study summarizes the significant findings of concrete pavement freeze–thaw durability performance, identifies existing knowledge gaps, and proposes future research needs. The concrete material deterioration mechanism under freeze–thaw cycles is first critically reviewed. Current deterioration theories mainly include the hydrostatic pressure hypothesis, osmolarity, and salt crystallization pressure hypothesis. The critical saturation degree has been proposed to depict the influence of internal saturation on freeze–thaw damage development. Meanwhile, the influence of pore solution salinity on freeze–thaw damage level has not been widely investigated. Additionally, the deterioration mechanism of the typical D-cracking that occurs in concrete pavement has not been fully understood. Following this, we investigate the coupling effect between freeze–thaw and other loading or environmental factors. It is found that external loading can accelerate the development of freeze–thaw damage, and the acceleration becomes more evident under higher stress levels. Further, deicing salts can interact with concrete during freeze–thaw cycles, generating internal pores or leading to crystalline expansion pressure. Specifically, freeze–thaw development can be mitigated under relatively low ion concentration due to increased frozen points. The interactive mechanism between external loading, environmental ions, and freeze–thaw cycles has not been fully understood. Finally, the mitigation protocols to enhance frost resistance of concrete pavement are reviewed. Besides the widely used air-entraining process, the freeze–thaw durability of concrete can also be enhanced by using fiber reinforcement, pozzolanic materials, surface strengthening, Super Absorbent Polymers (SAPs), and Phase Change Materials. This study serves as a solid base of information to understand how to enhance the freeze–thaw durability of concrete pavement.     

单中心3760例泌尿系结石成分及其相关因素分析

目的探讨本地区泌尿系结石疾病患者利用泌尿系结石红外光线自动分析仪分析的结石成分构成及其临床意义。方法回顾性分析我院2014年5月至2020年5月3760例泌尿系结石疾病患者资料,采用泌尿系结石红外光线自动分析仪（LIIR-20型）分析结石成分组成。结果泌尿系结石以肾结石为主（2932例,77.98%）。从结石成分看,草酸钙结石最常见2999例（79.76%）、其次分别是无水尿酸结石229例（6.09%）、碳酸磷灰石187例（4.97%）。从性别来看,男性泌尿系结石发病率明显高于女性[男2659例（70.72%）,女1101例（29.28%）],其中男性一水草酸钙结石较女性明显多发（男71.86%,2155/2999;女28.14%,844/2999）,女性六水磷酸铵镁类感染性结石明显多于男性（男36.36%,52/143;女63.64%,91/143）。从年龄上看,成年患者多表现为一水草酸钙结石,而小儿患者（10岁及以下）多表现为尿酸胺（30.43%,56/184）及胱氨酸结石（3.80%,7/184）。结论本医疗中心泌尿系结石成分以草酸钙类结石为主,存在着年龄及性别等的差异;泌尿系结石红外光线自动分析仪作为新技术可以很好地分析泌尿系结石成分,为针对结石成分的特点采取相应的预防和诊疗措施提供了依据。     

Simple renal cyst as an independent risk factor for hypertension

A simple renal cyst (SRC) may increase the risk for hypertension. The authors examined the relationship between a SRC and hypertension in participants receiving physical examinations at Hebei Medical University. This study enrolled 66 883 participants who received physical examinations at our center from January 2012 to December 2017. Demographic data, medical history related to hypertension, hematological indexes, hypertension, and SRC subtype based on ultrasound examinations were examined. The relationship between SRC and hypertension was analyzed using univariate and multivariate logistic regression analysis in different models. Subgroup analysis and propensity score (PS) matching were also performed. Based on SRC subtype (unitary vs. multiple, small vs. large, unilateral vs. bilateral), a comprehensive scoring system was established to determine the effect of SRC load on hypertension. The results of univariate and multivariate analysis indicated that SRC was a risk factor for hypertension (P < .01). Subgroup and interaction analysis showed the homogeneity that SRC was an independent risk factor for hypertension in multiple subgroups (P > .05). A SRC remained an independent risk factor for hypertension after PS matching (P < .01). Based on a scoring system that considered different SRC subtypes, the risk for hypertension increased with renal cyst load (P < .01). In conclusions, a SRC was an independent risk factor for hypertension, and there was a positive correlation between SRC load and hypertension. The risk of hypertension increased gradually with the size, number, and location of a SRC. Careful follow‐up or excision should be considered for patients with SRCs.     

Surgical management strategy for leiomyosarcoma of Zone I-II inferior vena cava: A case series

Objectives:Leiomyosarcoma of inferior vena cava (IVC) is a rare clinical entity with severe vascular involvement. Surgical management of leiomyosarcoma is still challenging.Methods:This a retrospective study of consecutive patients referred to our hospital from January 2017 to June 2019. Depending on the anatomical site of affected IVC, leiomyosarcomas were categorized into zone I-II. The clinical data including baseline information, surgical parameters, peri-operative management, short- and mid-term outcomes were observed.Results:Four patients with leiomyosarcoma of zone I-III underwent radical resection without intraoperative mortality. Prosthetic grafts were interpositioned in all patients to instruct vena cava. Renal vein reconstruction was perfumed in two patients due to involvement to renal veins. Median blood loss was 450 mL (200–600 mL), median operative time was 215 minutes (150–240 minutes). No Clavien-Dindo IIIa or higher complication was observed. No organ dysfunction and recurrence were observed with median follow-up of 25.5 months.Conclusions:Curative resection of zone I-II leiomyosarcoma is associated with longer survival in selected cases, en-bloc resection with complex vascular reconstruction could be considered.     

Clinical course and outcomes of COVID-19 patients with chronic obstructive pulmonary disease: A retrospective observational study in Wuhan,China

Information about coronavirus disease 2019 (COVID-19) patients with pre-existing chronic obstructive pulmonary disease (COPD) is still lacking. The aim of this study is to describe the clinical course and the outcome of COVID-19 patients with comorbid COPD.This retrospective study was performed at Wuhan Huoshenshan Hospital in China. Patients with a clear diagnosis of COVID-19 who had comorbid COPD (N = 78) were identified. COVID-19 patients without COPD were randomly selected and matched by age and sex to those with COPD. Clinical data were analyzed and compared between the two groups. The composite outcome was the onset of intensive care unit admission, use of mechanical ventilation, or death during hospitalization. Multivariable Cox regression analyses controlling for comorbidities were performed to explore the relationship between comorbid COPD and clinical outcome of COVID-19.Compared to age- and sex-matched COVID-19 patients without pre-existing COPD, patients with pre-existing COPD were more likely to present with dyspnea, necessitate expectorants, sedatives, and mechanical ventilation, suggesting the existence of acute exacerbations of COPD (AECOPD). Greater proportions of patients with COPD developed respiratory failure and yielded poor clinical outcomes. However, laboratory tests did not show severer infection, over-activated inflammatory responses, and multi-organ injury in patients with COPD. Kaplan–Meier analyses showed patients with COPD exhibited longer viral clearance time in the respiratory tract. Multifactor regression analysis showed COPD was independently correlated with poor clinical outcomes.COVID-19 patients with pre-existing COPD are more vulnerable to AECOPD and subsequent respiratory failure, which is the main culprit for unfavorable clinical outcomes. However, COPD pathophysiology itself is not associated with over-activated inflammation status seen in severe COVID-19.     

Comparison of the safety and prognosis of sequential regorafenib after sorafenib and lenvatinib treatment failure in patients with unresectable hepatocellular carcinoma: a retrospective cohort study

BackgroundThere is lack of studies on sequential regorafenib after sorafenib and lenvatinib treatment failure in patients with unresectable hepatocellular carcinoma (HCC). This study was to explore the safety and prognosis of sequential regorafenib after sorafenib and lenvatinib failure in HCC patients.MethodsThis study was a retrospective, real-world study that included 50 HCC patients who received sequential regrafinib after sorafenib and lenvatinib failure. The safety and prognosis of two groups were compared.ResultsThe incidence of all grade and III/IV adverse events were 68% and 24%. According to Response Evaluation Criteria in Solid Tumours (RECIST) 1.1 and modified (m) RECIST standards, the objective response rates (ORRs) after receiving regorafenib were 14.0% and 22.0%, respectively. The disease control rates (DCRs) were 62.0% and 60.0%, respectively. Based on different first-line targeted drugs, 50 patients were divided into sorafenib (n=22) and lenvatinib group (n=28). There was no differences between two groups except age and bilirubin. And there was no differences in other treatments before or after regorafenib. The baseline between two groups was basically same and had good comparability. There was no difference in incidence of all grade and III/IV adverse events, ORR and DCR between two groups (P>0.05). On long-term prognosis, total overall survival (TOS) in sorafenib and lenvatinib group were 23.0 (95% CI: 15.1–30.9) vs. 29.7 (95% CI: 21.4–38.1) months. The difference was statistically significant (P=0.041). Besides, regorafenib overall survival (ROS) in sorafenib and lenvatinib group were 11.7 (95% CI: 7.1–16.3) vs. 15.9 (95% CI: 8.3–23.5) months. The difference was statistically significant ( P=0.045). The regorafenib progression-free survival (RPFS) was 5.6 (95% CI: 1.9–9.2) vs. 8.0 (95% CI: 5.1–10.9) months in sorafenib and lenvatinib group, respectively, and difference was not statistically significant (P=0.380).ConclusionsRegorafenib is an effective drug for second-line treatment of HCC, with fewer severe adverse events, ORR and DCR was 14–22% and 62–60%, respectively. Both TOS and ROS in lenvatinib group were better than those in sorafenib group. For HCC patients whose first-line targeted drug is lenvatinib, it is safe and effective to accept regorafenib after disease progresses.