Role of high dose vitamin C in management of hospitalised COVID-19 patients:A minireview

Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has emerged as one of the most dreadful viruses the mankind has witnessed.It has caused worldwide havoc and wrecked human life.In our quest to find therapeutic options to counter this threat,several drugs have been tried,with varying success.Certain agents like corticosteroids,some anti-virals and immunosuppressive drugs have been found useful in improving clinical outcomes.Vitamin C,a water-soluble vitamin with good safety profile,has been tried to reduce progression and improve outcomes of patients with coronavirus disease 2019(COVID-19).Because of its anti-oxidant and immunomodulatory properties,the role of vitamin C has expanded well beyond the management of scurvy and it is increasingly been employed in the treatment of critically ill patients with sepsis,septic shock,acute pancreatitis and even cancer.However,in spite of many case series,observational studies and even randomised control trials,the role of vitamin C remains ambiguous.In this review,we will be discussing the scientific rationale and the current clinical evidence for using high dose vitamin C in the management of COVID-19 patients.

贝壳杉烷型四环二萜^(13)C NMR谱的研究及其应用

较系统的总结了贝壳杉烷型四环二萜的1 3CNMR数据 ,探讨了其1 3CNMR的规律和特征 .并在此基础上报道了一个新的贝壳杉烷型四环二萜化合物———对映 1 6β,1 7,1 8 三羟基 贝壳杉烷 1 9 羧酸 .

Suppressing fatty acid synthase by type Ⅰ interferon and chemical inhibitors as a broad spectrum anti-viral strategy against SARS-CoV-2

SARS-CoV-2 is an emerging viral pathogen and a major global public health challenge since December of 2019, with limited effective treatments throughout the pandemic.As part of the innate immune response to viral infection, type Ⅰ interferons(IFN-Ⅰ) trigger a signaling cascade that culminates in the activation of hundreds of genes, known as interferon stimulated genes(ISGs), that collectively foster an antiviral state.We report here the identification of a group of type Ⅰ interferon suppressed genes,including fatty acid synthase(FASN), which are involved in lipid metabolism.Overexpression of FASN or the addition of its downstream product, palmitate, increased viral infection while knockout or knockdown of FASN reduced infection.More importantly, pharmacological inhibitors of FASN effectively blocked infections with a broad range of viruses, including SARS-CoV-2 and its variants of concern.Thus, our studies not only suggest that downregulation of metabolic genes may present an antiviral strategy by type Ⅰ interferon, but they also introduce the potential for FASN inhibitors to have a therapeutic application in combating emerging infectious diseases such as COVID-19.

上海市新型冠状病毒肺炎患者的临床特征及其相关因素分析

目的·探讨上海市本地新型冠状病毒SARS-CoV-2(severe acute respiratory syndrome coronavirus 2)感染人群发病的一般临床特征及其相关影响因素。方法·选取2020年1月-3月在上海市(复旦大学附属)公共卫生临床中心收治住院并确诊为新型冠状病毒肺炎(coronavirus disease 2019,COVID-19)的320例患者为研究对象。收集患者临床资料,分析其临床特征;利用R语言的统计学运算公式,分别对患者的住院天数、超敏C反应蛋白浓度升高天数(超敏天数)、肺部CT好转天数(CT天数)、咽拭子核酸检测转阴天数与其主要临床表现及实验室数据进行相关性分析,寻找影响上述4个变量的关联因素。结果·在320例患者中,轻型患者占6.25%、普通型占83.44%、重型占6.88%、危重型占3.44%,其中91.25%有湖北接触史,79.06%有发热症状,46.56%有咳嗽,21.56%有咳痰,15.31%有疲劳感。Spearman相关性分析结果显示,乳酸脱氢酶浓度、白细胞介素-2(interleukin-2,IL-2)浓度、IL-6浓度分别与上述4个变量呈正相关(均P<0.05),白蛋白浓度与超敏天数呈负相关(P=0.018),CD4^+细胞计数与CT天数、核酸转阴天数呈负相关(均P<0.05)。逐步多元线性回归分析结果显示,降钙素原(procalcitonin,PCT)浓度与住院天数、CT天数、超敏天数呈负相关(均P<0.05),分型与住院天数、超敏天数、CT天数、核酸转阴天数呈正相关(均P<0.05)。结论·上海市本地患者以普通型多见,发热、咳嗽、疲劳为常见症状,多伴有肺部CT异常。该类患者的治疗效果及预后与疾病分型、PCT及IL-6浓度、CD4^+细胞等水平相关。