Hypertension is a risk factor for adverse outcomes in patients with coronavirus disease 2019: a cohort study

Abstract

Background

Comorbidities are commonly seen in patients with coronavirus disease 2019 (COVID-19), but the clinical implication is not yet well-delineated. We aim to characterize the prevalence and clinical implications of comorbidities in patients with COVID-19.     

Rabs and axonal regeneration

Membrane trafficking processes are presumably vital for axonal regeneration after injury, but mechanistic understanding in this regard has been sparse. A recent loss-of-function screen had been carried out for factors important for axonal regeneration by cultured cortical neurons and the results suggested that the activity of a number of Rab GTPases might act to restrict axonal regeneration. A loss of Rab27b, in particular, is shown to enhance axonal regeneration in vitro, as well as in C. elegans and mouse central nervous system injury models in vivo. Possible mechanisms underlying this new finding, which has important academic and translational implication, are discussed.     

Ligustrazine inhibits high voltage-gated Ca~(2+) and TTX-resistant Na~+ channels of primary sensory neuron and thermal nociception in the rat:a study on peripheral mechanism

Objective Ligustrazine, also named as tetramethylpyrazine, is a compound purified from Ligusticum chuanxiong hort and has ever been testified to be a calcium antagonist. The present investigation was to determine the antinoci-ceptive effect of ligustrazine and, if any, the peripheral ionic mechanism involved. Methods Paw withdrawal Latency ( PWL) to noxious heating was measured in vivo and whole-cell patch recording was performed on small dorsal root ganglion (DRG) neurons. Results Intraplantar injection of ligustrazine (0.5 mg in 25μl) significantly prolonged the withdrawal latency of ipsilateral hindpaw to noxious heating in the rat. Ligustrazine not only reversibly inhibited high-voltage gated calcium current of dorsal root ganglion (DRG) neuron in dose-dependent manner with IC50 of 1.89 mmol/L, but also decreased tetrodotoxin (TTX) -resistant sodium current in relatively selective and dose-dependent manner with IC50 of 2.49 mmol/L. Conclusion The results suggested that ligustrazine could elevate the threshold of thermal nociception through inhibiting the high-voltage gated calcium current and TTX-resistant sodium current of DRG neuron in the rat.     

Pulmonary Lophomonas blattarum infection in patients with kidney allograft transplantation

The aim of the study was to analyse the clinical manifestation and management of pulmonary Lophomonas blattarum infection in four allograft transplantation recipients retrospectively. Four patients with pulmonary L. blattarum infection were diagnosed by using Fiberoptic bronchoscopy (FOB) and bronchoalveolar lavage (BAL) examination. Their clinical manifestation and management are summarized. Four cases of pulmonary L. blattarum were found during the period from the second month to the third month after transplantation. Concurring infection by other pathogens was found in three of them. Common initial symptoms included fever (>38 degrees C) without cough and breathlessness. Lower lobe shadowing could be found on chest X-ray. Body temperature decreased to the normal range in three patients and to 37.5 degrees C in the other one, after intravenous injection of metronidazole and tapering immunosuppressant. Radiological examination confirmed improved health condition of the patients afterwards. Two patients received repeated FOB and only dead L. blattarum was found. Pulmonary L. blattarum infection in allograft transplant recipients carry relatively obscure initial symptoms. Possible L. blattarum infection needs to be screened in post-transplantation pulmonary infection patients with similar symptoms, especially in those who respond poorly to anti-infection treatment. Microscopic examination of BAL fluid can help to identify pulmonary L. blattarum infection and metronidazole is an ideal treatment choice.     

慢性阻塞性肺病患者营养与餐后低氧的关系

目的研究慢性阻塞性肺病(COPD)患者的营养状况与餐后低氧的关系.方法51例COPD急性加重期后的患者连续监测就餐前后SpO2,同时记录饮食情况并换算为各营养素的量.结果营养不良组COPD患者餐后SpO2低于餐前,降低幅度超过3%(P＜0.05),进餐时间相对延长,营养物质摄入减少.SpO2变化与单位体质量总热量的摄入呈负相关(P＜0.05).结论重度COPD患者的营养状况可能与患者进餐后发生的缺氧、低氧血症有关,在营养支持中应考虑采取适当措施干预就餐引起的相关低氧血症的发生.     

The modified outside-in suture: vertical repair of the anterior horn of the meniscus after decompression of a large meniscal cyst

This article describes a modified suture technique designed for the vertical repair of the anterior horn of the meniscus after arthroscopic decompression of a large meniscal cyst. This procedure comprises of three steps: first, the meniscus was pierced vertically using a suture hook and a No. 0 PDS suture. Second, both ends of the No. 0 PDS on the femoral and tibial surfaces of the meniscus were pulled to the outside of the joint capsule using a spinal needle preloaded with suture material. Finally, a skin incision was made adjacent to the suture materials, and both ends were tied. We recommend this technique not only for the vertical repair of the anterior horn of the meniscus after decompression of large meniscal cyst, but also to repair a longitudinal tear of the meniscus.     

神经纤维瘤蛋白在先天性脊柱侧凸患者成骨细胞和软骨细胞中的表达

目的：检测神经纤维瘤蛋白在先天性脊柱侧凸患者成骨细胞和软骨细胞中的表达。方法：6例先天性脊柱侧凸患者，在后路手术时取髂骨及髂骨生长板，分离、培养成骨细胞和软骨细胞，分别行碱性磷酸酶染色和甲苯胺蓝染色。逆转录-多聚酶链反应（RT—PCR）检测神经纤维瘤蛋白mRNA．间接免疫荧光和Westemblot检测神经纤维瘤蛋白在成骨细胞和软骨细胞中的表达。结果：先天性脊柱侧凸患者成骨细胞和软骨细胞中存在Ⅱ型神经纤维瘤蛋白表达，该蛋白主要分布在细胞浆，所表达蛋白为三磷酸鸟苷酶活化蛋白（GAP）活性较弱的Ⅱ型异构体。结论：先天性脊柱侧凸患者成骨细胞和软骨细胞中存在神经纤维瘤蛋白表达，但该蛋白是否通过对成骨细胞和软骨细胞的影响导致骨骼系统异常还有待于进一步研究。     

肾移植术后并发尿路上皮肿瘤的临床分析

目的 分析肾移植患者并发尿路上皮肿瘤的特点，探讨其诊治方法。方法 自1998～2003年肾移植患者1293例，术后发生尿路上皮恶性肿瘤21例（1．6％）。男4例，女17例。17例原发病为慢性问质性肾炎。发生尿路上皮肿瘤距肾移植6～62个月，平均26个月。其中膀胱癌6例，单侧肾盂或输尿管癌6例，单侧肾盂或输尿管、膀胱癌8例，双侧肾盂输尿管癌1例。10例上尿路肿瘤发生部位与移植肾同侧，4例发生于移植肾对侧。临床症状以无痛性肉服血尿和反复泌尿系感染为主。19例行手术治疗，术后所有患者免疫抑制剂用量减少1／3并辅以局部灌注化疗。结果 2例行姑息性治疗的晚期肿瘤患者分别于发现肿瘤5、8个月死亡。余19例现已随访2～5年。13例肿瘤复发，复发部位为膀胱或对侧原。肾、输尿管。所有患者在免疫抑制剂减量期间均未出现急性排斥。2例因切除移植肾恢复透析，17例肾功能正常。结论 慢性间质性。肾炎导致。肾功能衰竭的。肾移植患者和女性肾移植患者易发生移植后尿路上皮肿瘤；移植肾同侧上尿路较对侧好发肿瘤；对移植肾对侧为首发的上尿路发生肿瘤者可预防性行双侧上尿路根治性切除。     

经皮激光椎间盘减压术治疗椎间盘源性腰痛

目的探讨经皮激光椎间盘减压术（percutaneous laser disc decompression，PLDD）治疗椎间盘源性腰痛的疗效。方法2002年6月～2004年12月我院对36例椎间盘源性腰痛，采用英国DIOMED公司半导体激光仪，激光功率15W，每个激光脉冲持续1s，间隔1s，照射能量800～1200J。VAS评分评价治疗效果。结果手术时间15～60min，平均30min。32例出现“疼痛复制效应”。36例随访6～36个月，平均11个月，32例有效（术后VAS评分改善≥3分18例，≥分14例），4例无效，有效率88．9％（32／36）。结论PLDD治疗椎间盘源性腰痛安全、有效、微创。     

鸡抗内毒素卵黄抗体IgY的制备

目的：研究分别应用内毒素（LPS）、类脂A(LipidA)和大肠杆菌突变株15免疫鸡后其蛋黄中抗内毒素抗体IgY的产量、纯度、效价并筛选最佳免疫抗原。方法：分别应用内毒素（LPS）、类脂A(LipidA)和大肠杆菌J5突变株作为抗原免疫25周龄Leghom鸡，水溶法（WD）提取蛋黄中抗体IgY，双紫外光测定抗体含量，SDS-PSGE电泳检测抗体纯度，细胞酶联染色和ELISA检测抗体特异性、效价及筛选最佳免疫抗原。结果：3种抗内毒素IgY含量和效价分别为14.4mg/ml和1：12 800（J5）、10.61mg/ml和1：12 800（LPS）、9.26mg/ml和1：3200（LipidA），抗体纯度均为95％左右。结论：大肠杆菌突变株J5和内毒素（LPS）为最佳免疫抗原，免疫鸡后其蛋黄中抗内毒素抗体IgY的产量和效价最高。