scholarly journals COVID-19 and Extracellular Vesicles: An Intriguing Interplay

2020 ◽  
Vol 45 (5) ◽  
pp. 661-670
Author(s):  
Gabriella Pocsfalvi ◽  
Ramila Mammadova ◽  
Ana Paulina Ramos Juarez ◽  
Ramesh Bokka ◽  
Francesco Trepiccione ◽  
...  
Keyword(s):  
Extracellular Vesicles ◽  
Viral Entry ◽  
Viral Infections ◽  
Vaccine Development ◽  
Antiviral Drug ◽  
The Novel ◽  
Health Crisis ◽  
Cargo Delivery ◽  
The Many ◽  
Novel Coronavirus

Background: The outbreak of severe acute respiratory syndrome β-coronavirus 2 (SARS-CoV-2) has the potential to become a long-lasting global health crisis. The number of people infected with the novel coronavirus has surpassed 22 million globally, resulting in over 700,000 deaths with more than 15 million people having recovered (https://covid19.who.int). Enormous efforts are underway for rapid vaccine and treatment developments. Amongst the many ways of tackling the novel coronavirus disease 2019 (COVID-19) pandemic, extracellular vesicles (EVs) are emerging. Summary: EVs are lipid bilayer-enclosed structures secreted from all types of cells, including those lining the respiratory tract. They have established roles in lung immunity and are involved in the pathogenesis of various lung diseases, including viral infection. In this review, we point out the roles and possible contribution of EVs in viral infections, as well as ongoing EV-based approaches for the treatment of COVID-19, including clinical trials. Key Messages: EVs share structural similarities to viruses and recent findings demonstrate that viruses exploit EVs for cellular exit and EVs exploit viral entry mechanisms for cargo delivery. Moreover, EV-virus interplay could be exploited for future antiviral drug and vaccine development. EV-based therapies, especially the mesenchymal stem cell-derived EVs, are being intensively studied for the treatment of COVID-19.

scholarly journals A review on the SARS-CoV-2 mediated global pandemic: proximal origin, pathogenicity and therapeutic approaches

2020 ◽  
Author(s):  
Soumi Chatterjee ◽  
Bikram Dhara ◽  
Dattatreya Mukherjee ◽  
Arup Kumar Mitra
Keyword(s):  
Vaccine Development ◽  
Geographical Area ◽  
Antiviral Drug ◽  
Drug Repurposing ◽  
The Novel ◽  
Therapeutic Approaches ◽  
Health Crisis ◽  
Public Health Crisis ◽  
Global Pandemic ◽  
Viral Outbreak

The world is amidst a public health crisis as the pandemic has shook us to the core. The COVID-19 caused by the novel SARS-CoV-2 is of zoonotic origin and this tries to explain what could have been the possible proximal origins for the disease in humans. Our review aims at addressing the question like what structural or genomic vicissitude enabled the viral outbreak across genera and so efficiently infect the human populace across the globe. We also try to discuss the prospect of drug repurposing and scope for vaccine development considering the rapid genome modification of the virus. Another finding lies into the action of pre-existing drugs when they are applied in combination and probably that shades some light on the therapeutic approaches. Several investigation have been performed but we are still in search of a novel antiviral drug. With that vision, our focus shifted on the evaluation of existing drugs with positive response against the novel corona virus. We also try discussing certain trends including increased immunity to the disease in the population from a particular geographical area.

scholarly journals A commentary on podiatry during the Covid-19 pandemic

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Paul Chadwick ◽  
Lawrence Ambrose ◽  
Ross Barrow ◽  
Martin Fox
Keyword(s):  
Viral Infections ◽  
The Novel ◽  
Post Discharge ◽  
Foot Health ◽  
The United Kingdom ◽  
Reduce Risk ◽  
The Many ◽  
Novel Coronavirus ◽  
The Uk

Abstract Background The arrival of the novel coronavirus (SARS-CoV-2) has impacted the many aspects of modern life, especially, in the immediate term, the delivery of healthcare. Context This commentary examines the profession of podiatry and how it has adapted and responded to the emerging crisis. It focusses on but is not exclusive to the position in the United Kingdom (UK) and the edicts and direction from the UK Government. Podiatry roles during the pandemic It describes the role of podiatry in the pandemic and highlights the deployment of podiatry resources to fight the pandemic beyond traditional podiatric practice. It also looks at the shift from conventional consultation to digital solutions for managing patients in an effort to achieve the goals of maintenance of foot health whilst reducing the spread of the virus. The commentary summarises the emerging data related to a possible foot related presentation of the coronavirus. Conclusion The podiatry profession proved its flexibility and adaptability during the pandemic, to adjust rapidly to ensure that patients were able to access treatment to reduce risk of infection, ulceration and amputation. Dermatological presentations on the feet have been associated with Covid-19 in adolescents as is often the case in viral infections. CPD webinars to support clinicians and manage and prevent the spread of Covid-19 have been widely disseminated along with algorithms to ensure that patients that need treatment are being treated appropriately. Podiatrists have embraced remote technology to ensure that patients are correctly and safely triaged and, signposted and given appropriate self-care advice. MSK podiatrists have the ability to play an intrinsic role within the post discharge rehabilitation pathway.

scholarly journals Potential role of Curcumin against viral infections with a view on structure and pathogenesis of COVID-19

2020 ◽  
Author(s):  
Kajal Singh
Keyword(s):  
Treatment Option ◽  
Viral Entry ◽  
Potential Role ◽  
Viral Infections ◽  
Host Cells ◽  
Health Crisis ◽  
Positive Sense ◽  
Anti Oxidant ◽  
Novel Coronavirus

A novel Coronavirus disease 2019 (nCOVID-19) is an enveloped, positive sense, single stranded RNA viruses of zoonotic origin caused by Severe acute respiratory syndrome coronavirus, currently responsible for pandemic health crisis. Due to increasing mortality rate there is an immediate need to develop possible treatments and understand the mechanism through which virus can cause complications in human body. The review intended to provide link between natural product as treatment and COVID-19 disease. Therefore, this review summarizes the structure, pathogenesis as well as understanding the various role of curcumin as a treatment option for COVID-19 which includes: targeting viral entry to host cells, targeting viral replication, anti-viral, anti-inflammatory and anti-oxidant. Hence, curcumin can be a potential treatment option for COVID-19 patients and this review also suggest that more clinical research and development is needed in order to prepare a new drug for emerging SARS-CoV-2.

Coronavirus: Towards controlling of the pandemic - Indian scenario

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 462-468
Author(s):  
Latika kothari ◽  
Sanskruti Wadatkar ◽  
Roshni Taori ◽  
Pavan Bajaj ◽  
Diksha Agrawal
Keyword(s):  
Control Measures ◽  
The Novel ◽  
Medical Treatments ◽  
Health Crisis ◽  
The Public ◽  
Infection Control Measures ◽  
The Social ◽  
Asking Questions ◽  
The Government ◽  
Novel Coronavirus

Coronavirus disease 2019 (COVID-19) is a communicable infection caused by the novel coronavirus resulting in severe acute respiratory syndrome coronavirus 2 (SARS-CoV). It was recognized to be a health crisis for the general population of international concern on 30th January 2020 and conceded as a pandemic on 11th March 2020. India is taking various measures to fight this invisible enemy by adopting different strategies and policies. To stop the COVID-19 from spreading, the Home Affairs Ministry and the health ministry, of India, has issued the nCoV 19 guidelines on travel. Screening for COVID-19 by asking questions about any symptoms, recent travel history, and exposure. India has been trying to get testing kits available. The government of India has enforced various laws like the social distancing, Janata curfew, strict lockdowns, screening door to door to control the spread of novel coronavirus. In this pandemic, innovative medical treatments are being explored, and a proper vaccine is being hunted to deal with the situation. Infection control measures are necessary to prevent the virus from further spreading and to help control the current situation. Thus, this review illustrates and explains the criteria provided by the government of India to the awareness of the public to prevent the spread of COVID-19.

scholarly journals Persistent SARS-CoV-2-positive over 4 months in a COVID-19 patient with CHB

Open Medicine ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 749-753
Author(s):  
Wenyuan Li ◽  
Beibei Huang ◽  
Qiang Shen ◽  
Shouwei Jiang ◽  
Kun Jin ◽  
...  
Keyword(s):  
The Novel ◽  
Chain Reaction ◽  
Health Crisis ◽  
Public Health Crisis ◽  
Oxygen Inhalation ◽  
New Strategy ◽  
Polymerase Chain ◽  
Novel Coronavirus ◽  
Specific Symptoms

Abstract In recent months, the novel coronavirus disease 2019 (COVID-19) pandemic has become a major public health crisis with takeover more than 1 million lives worldwide. The long-lasting existence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has not yet been reported. Herein, we report a case of SARS-CoV-2 infection with intermittent viral polymerase chain reaction (PCR)-positive for >4 months after clinical rehabilitation. A 35-year-old male was diagnosed with COVID-19 pneumonia with fever but without other specific symptoms. The treatment with lopinavir-ritonavir, oxygen inhalation, and other symptomatic supportive treatment facilitated recovery, and the patient was discharged. However, his viral PCR test was continually positive in oropharyngeal swabs for >4 months after that. At the end of June 2020, he was still under quarantine and observation. The contribution of current antivirus therapy might be limited. The prognosis of COVID-19 patients might be irrelevant to the virus status. Thus, further investigation to evaluate the contagiousness of convalescent patients and the mechanism underlying the persistent existence of SARS-CoV-2 after recovery is essential. A new strategy of disease control, especially extending the follow-up period for recovered COVID-19 patients, is necessary to adapt to the current situation of pandemic.

Volatility transmission across international markets amid COVID 19 pandemic

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hechem Ajmi ◽  
Nadia Arfaoui ◽  
Karima Saci
Keyword(s):  
Crude Oil ◽  
International Markets ◽  
The Novel ◽  
Data Set ◽  
Health Crisis ◽  
Content Type ◽  
Volatility Transmission ◽  
Oil Markets ◽  
Novel Coronavirus ◽  
Death Cases

Purpose This paper aims to investigate the volatility transmission across stocks, gold and crude oil markets before and during the novel coronavirus (COVID-19) crisis. Design/methodology/approach A multivariate vector autoregression (VAR)-Baba, Engle, Kraft and Kroner generalized autoregressive conditional heteroskedasticity model (BEKK-GARCH) is used to assess volatility transmission across the examined markets. The sample is divided as follows. The first period ranging from 02/01/2019 to 10/03/2020 defines the pre-COVID-19 crisis. The second period is from 11/03/2020 to 05/10/2020, representing the COVID-19 crisis period. Then, a robustness test is used using exponential GARCH models after including an exogenous variable capturing the growth of COVID-19 confirmed death cases worldwide with the aim to test the accuracy of the VAR-BEKK-GARCH estimated results. Findings Results indicate that the interconnectedness among the examined market has been intensified during the COVID-19 crisis, proving the lack of hedging opportunities. It is also found that stocks and Gold markets lead the crude oil market especially during the COVID-19 crisis, which explains the freefall of the crude oil price during the health crisis. Similarly, results show that Gold is most likely to act as a diversifier rather than a hedging tool during the current health crisis. Originality/value Although the recent studies in the field focused on analyzing the relationships between different markets during the first quarter of 2020, this study considers a larger data set with the aim to assess the volatility transmission across the examined international markets Amid the COVID-19 crisis, while it shows the most significant impact on various financial markets compared to other diseases.

scholarly journals Viability of Bacillus subtilis Cells in Airborne Bioaerosols on Face Masks

Atmosphere ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1496
Author(s):  
Eun-Hee Lee ◽  
Yunsoo Chang ◽  
Seung-Woo Lee
Keyword(s):  
Bacillus Subtilis ◽  
World Health ◽  
The Novel ◽  
Fine Dust ◽  
Health Crisis ◽  
Viable Cells ◽  
Mask Material ◽  
Novel Coronavirus ◽  
Health Organization ◽  
Sand Dust

The coronavirus disease 2019 (COVID-19) pandemic is a general health crisis and has irreversible impacts on human societies. Globally, all people are at risk of being exposed to the novel coronavirus through transmission of airborne bioaerosols. Public health actions, such as wearing a mask, are highly recommended to reduce the transmission of infectious diseases. The appropriate use of masks is necessary for effectively preventing the transmission of airborne bioaerosols. The World Health Organization (WHO) suggests washing fabric masks or throwing away disposable masks after they are used. However, people often use masks more than once without washing or disposing them. The prolonged use of a single mask might—as a result of the user habitually touching the mask—promote the spread of pathogens from airborne bioaerosols that have accumulated on the mask. Therefore, it is necessary to evaluate how long the living components of bioaerosols can be viable on the masks. Here, we evaluated the viability of airborne Bacillus subtilis (B. subtilis) in bioaerosols filtered on woven and anti-droplet (non-woven) face masks. As a simulation of being simultaneously exposed to sand dust and bioaerosols, the viability rates of bioaerosols that had accumulated on masks were also tested against fine dust and airborne droplets containing bacteria. The bioaerosols survived on the masks immediately after the masks were used to filter the bioaerosols, and the bacteria significantly proliferated after one day of storage. Thereafter, the number of viable cells in the filtered bioaerosols gradually decreased over time, and the viability of B. subtilis in bioaerosols on the masks varied, depending on the mask material used (woven or non-woven). Despite the reduction in viability, bioaerosols containing living components were still found in both woven and anti-droplet masks even after six days of storage and it took nine days not to have found them on masks. The number of viable cells in bioaerosols on masks significantly decreased upon exposure of the masks to fine dust. The results of this study should provide useful information on how to appropriately use masks to increase their duration of effectiveness against bioaerosols.

scholarly journals Quinoline and Quinazoline Alkaloids against COVID-19: An In Silico Multitarget Approach

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Esraa M. O. A. Ismail ◽  
Shaza W. Shantier ◽  
Mona S. Mohammed ◽  
Hassan H. Musa ◽  
Wadah Osman ◽  
...  
Keyword(s):  
Antimalarial Activity ◽  
The Novel ◽  
Socioeconomic Impacts ◽  
Health Crisis ◽  
Natural Sources ◽  
Angiotensin Converting Enzyme 2 ◽  
Main Protease ◽  
Recent Outbreak ◽  
Novel Coronavirus ◽  
Potential Inhibitors

The recent outbreak of the highly contagious coronavirus disease 2019 (COVID-19) caused by the novel coronavirus SARS-CoV-2 has created a global health crisis with socioeconomic impacts. Although, recently, vaccines have been approved for the prevention of COVID-19, there is still an urgent need for the discovery of more efficacious and safer drugs especially from natural sources. In this study, a number of quinoline and quinazoline alkaloids with antiviral and/or antimalarial activity were virtually screened against three potential targets for the development of drugs against COVID-19. Among seventy-one tested compounds, twenty-three were selected for molecular docking based on their pharmacokinetic and toxicity profiles. The results identified a number of potential inhibitors. Three of them, namely, norquinadoline A, deoxytryptoquivaline, and deoxynortryptoquivaline, showed strong binding to the three targets, SARS-CoV-2 main protease, spike glycoprotein, and human angiotensin-converting enzyme 2. These alkaloids therefore have promise for being further investigated as possible multitarget drugs against COVID-19.

scholarly journals Colorectal Cancer that Highly Express Both ACE2 and TMPRSS2, Suggesting Severe Symptoms to SARS-CoV-2 Infection

2021 ◽  
Vol 27 ◽  
Author(s):  
Huai Wang ◽  
Jiankang Yang
Keyword(s):  
Colorectal Cancer ◽  
Dna Methylation ◽  
Viral Entry ◽  
Colon Adenocarcinoma ◽  
The Novel ◽  
Aberrant Expression ◽  
Systematic Analysis ◽  
More Care ◽  
Novel Coronavirus ◽  
Colorectal Cancer Patients

The epidemic of the novel, pathogenic SARS-coronavirus 2 (SARS-CoV-2) in the world pose a global health emergency. Cancer has been identified as a risk factor for the novel Coronavirus disease 2019 (COVID-19). The ACE2 and TMPRSS2 have been implicated in SARS-CoV-2 infection for mediating viral entry into the host cell. However, a systematic analysis of aberrant expression of ACE2 and TMPRSS2 was not yet reported in multiple human cancers. Here, we analyzed gene expression of ACE2 and TMPRSS2 across 31 types of tumors. Notably, overexpression of ACE2 and TMPRSS2 have been observed in colorectal cancer including colon adenocarcinoma (COAD), and rectum adenocarcinoma (READ). In addition, the colorectal tumors with upregulated gene expressing presented with decreased DNA methylation levels. DNA methylation might be one of the reasons for abnormal expression of ACE2 and TMPRSS2. Conclusively, colorectal cancer was the only cancer with the upregulated expression of ACE2 and TMPRSS2. More care of colorectal cancer patients is needed in multiple cancers affected by the COVID-19 outbreak.

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