Recent Advance in Natural Products with Antiviral Activities

Author(s):  
Zhi-Gang Sun ◽  
Zhi-Na Li ◽  
Xiang-Wan Miao ◽  
Shuang Li ◽  
Hai-Liang Zhu

: Virus is a type of noncellular organism, which is simple in structure, small in size and contains only one kind of nucleic acid (RNA or DNA). It must be parasitized in living cells and proliferates by replication. Viruses can infect plants or animals, which leads to many epidemic diseases, such as the current pandemic COVID-19. Viral infectious diseases have brought serious threats to the health of people around the world. Natural products are chemical substances that are usually produced by living organisms and have biological or pharmacological activity. Many of these natural products show antiviral activity. Based on the increasing importance of antiviral research, this paper focuses on the discovery and development of antiviral natural products since 2010.

Author(s):  
Oyere Tanyi Ebob ◽  
Smith B. Babiaka ◽  
Fidele Ntie-Kang

AbstractFor the past 2 years, the coronavirus responsible for the COVID-19 infection has become a world pandemic, ruining the lives and economies of several nations in the world. This has scaled up research on the virus and the resulting infection with the goal of developing new vaccines and therapies. Natural products are known to be a rich source of lead compounds for drug discovery, including against infectious diseases caused by microbes (viruses, bacteria and fungi). In this review article, we conducted a literature survey aimed at identifying natural products with inhibitory concentrations against the coronaviruses or their target proteins, which lie below 10 µM. This led to the identification of 42 compounds belonging to the alkaloid, flavonoid, terpenoid, phenolic, xanthone and saponin classes. The cut off concentration of 10 µM was to limit the study to the most potent chemical entities, which could be developed into therapies against the viral infection to make a contribution towards limiting the spread of the disease.


2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Maria Sorokina ◽  
Peter Merseburger ◽  
Kohulan Rajan ◽  
Mehmet Aziz Yirik ◽  
Christoph Steinbeck

AbstractNatural products (NPs) are small molecules produced by living organisms with potential applications in pharmacology and other industries as many of them are bioactive. This potential raised great interest in NP research around the world and in different application fields, therefore, over the years a multiplication of generalistic and thematic NP databases has been observed. However, there is, at this moment, no online resource regrouping all known NPs in just one place, which would greatly simplify NPs research and allow computational screening and other in silico applications. In this manuscript we present the online version of the COlleCtion of Open Natural prodUcTs (COCONUT): an aggregated dataset of elucidated and predicted NPs collected from open sources and a web interface to browse, search and easily and quickly download NPs. COCONUT web is freely available at https://coconut.naturalproducts.net.


Author(s):  
С. Л. Рибалко ◽  
Т. В. Крутських ◽  
А. С. Шаламай

<p><strong>STUDY OF ANTIVIRAL ACTIVITY OF TABLETS ALTABOR </strong></p><p><strong>S.L. Rybalko<sup>1</sup>, </strong><strong>Т</strong><strong>.V. </strong><strong>К</strong><strong>rutskikh<sup>2</sup>, </strong><strong>А</strong><strong>.S. Shalamay<sup>3</sup></strong></p><p><sup>1</sup>L.V.Gromashevsky Institute of epidemiology and infectious diseases Academy of Medical Science of Ukraine, Kyiv</p><p><sup>2</sup>National Pharmaceutical University, Kharkiv</p><p><sup>3</sup>JSC SIC "Borshchahivka CPP", Kyiv</p><p><strong>Summary:</strong> studied antiviral activity of tablets Altabor. Determined that the drug has antiviral activity and inhibits the reproduction of Epstein-Barr virus.</p><p><strong>Key words:</strong> altabor, antiviral activity, influenza, Epstein-Barr virus.</p><p><strong>Introduction.</strong> Among all infectious diseases flu and SARS took first place in frequency and the number of cases in the world and account for 95%. According to WHO influenza and flu-like illness in the world is sick 5 - 30 % of the population is 500 million people. For 400 years the world's recorded over 100 epidemics of influenza pandemics and 18, which bring it with them tens of millions of lives. Today, global losses from influenza epidemics is much inferior to the scale of past pandemics due to the possibilities of modern diagnosis of the virus , the availability of antiviral and antibacterial drugs and improving health services. But the problem of treatment of disease really matter remains relevant.</p><p>Against the background of acute viral infections of herpes viruses can be said not, but no less threatening. Herpes was first fixed in a thousand years BC, but the problem that attracts attention, was only in the 20th century after the emergence of HIV. Today open 80 more members of the family of herpes viruses, of which 8 types pathogenic to man. One of the pathogenic types are Epstein-Barr virus, which, according to research antibodies detected in 95% of the population. At this time this virus play an important role in the formation of cancer cells in the body that causes the need for increasing attention from the medical and pharmaceutical community.</p><p>Create antiviral agents is one of the most difficult tasks chemotherapy infections. The reason is that viruses containing RNA and DNA components are obligate intracellular parasites. In the process of viral replication is mainly used machine biosynthesis microorganism cells, modifying its outstanding manner. In this regard, it is very difficult to find selective operating means which would killed viruses without damaging the cells are "master". However, in recent years, certain antiviral drugs that possess outstanding selective action against the infected cells and suppress the virus replicative cycle. One of these drugs is original domestic product - Altabor tablets.</p><p><strong>Methods.</strong> Antiviral activity of Altabor tablets studied in models in vitro. To determine influenza activity using dog kidney cell culture .The influence of tablets Altabor on virus Epstein-Barr conducted in the system Raji cells infected with the said virus.</p><p><strong>Results and discussion</strong>. Altabor tablets influenza activity based on the inhibition of viral neuraminidase, an enzyme responsible for viral virion ability to penetrate the host cell and leave it after reproduction. Analyzing these data, it should be noted that tablets Altabor actively inhibit the reproduction of the influenza virus in doses from 100 mg/ml to 6.75 ug/ml 7.5-3.0 lg ID50, which indicates a strong flu drug activity. As for the study of the effect of tablets on Altabor Epstein-Barr virus, the maximum tolerated concentration was 750 mg/ml. Determined that the minimum active concentration for the drug was 0.1 mg/ml. Based on the value of the minimum and maximum tolerated concentration of active therapeutic index of tablets Altabor established at 5000, indicating a pronounced effects on reproduction of the virus.</p><p><strong>Conclusions.</strong> Result of studies on the antiviral activity of tablets Altabor found that the preparation has flu activity. Also, the drug inhibits the reproduction of Epstein-Barr virus, as evidenced therapeutic index of tablets Altabor set at 5000.</p>


2020 ◽  
Author(s):  
Sindhu KC ◽  
Manoj Pandit ◽  
Amit Kumar Shrivastava

Abstract Coronavirus is a non-segmented, positive-sense RNA genome belonging to the family coronaviridae in the order Nidovirales Corona viral infections have created serious threats in the last couple of decades and recently claiming the death of thousands of human beings. Natural products provide a valuable and powerful resource of chemical compounds alkaloids, tannins, caffeine, biopterin, actinophnine, etc. displaying antiviral properties. The data was reviewed from various databases or search engines: PubMed, Science Direct, MedLine, Google Scholar, and Biomed central for published articles. The data inclusion criteria was natural products and their isolated and different synthetic compounds. Data duplication and titles or contents that do not meet the inclusion criteria and Reports on antiviral activities of natural products or their derivatives against other than CoV strains were excluded. We encountered 49 plants and 19 compound chemically defined natural molecules reported in the literature, which have evaluated for potent antiviral activity against different coronavirus strains. The listed plants and their compounds in this review are highly potent with promising results against coronavirus. These can be further screened for invasive tests and used for making different formulations or may be polyherbal formulations considering its safety profile and toxicity.


2021 ◽  
Author(s):  
Wenjia Gu ◽  
Yiwu Zheng ◽  
Taras Pogorelov ◽  
Satish K. Nair ◽  
Eric W. Schmidt

<div><div><div><p>YcaO proteins are ubiquitous in living organisms, where they perform crucial post-translational modifications of peptides and proteins. They are used extensively in biotechnology in companies and academic settings around the world. They also underlie some of the most important natural products in pharmaceutical development, such as thiopeptides (thiostrepton, etc.). Here, we solve one of the major outstanding mysteries behind YcaO proteins: how they exert precision selectivity of the nucleophile. The resulting findings have major implications in understanding the >30,000 YcaO proteins currently in sequencing databases and will be used widely for precision synthetic biology applications.</p></div></div></div>


2021 ◽  
Vol 926 (1) ◽  
pp. 012065
Author(s):  
A Dewantoro ◽  
W C Anggundari ◽  
B Prasetya ◽  
Yopi

Abstract Emerging infectious diseases (EID) such as COVID-19 had been widely caused massive impact for all countries in the world. The spreading of pathogens became uncontrolled and unpredictable to overcome this pandemic disease. Some non-waterborne EID also was discovered in wastewater in many countries of the world. Studies showed that digital PCR could become a powerful tool for environmental surveillance. It enables the performance of absolute quantification for nucleic acid with a high inhibitory sample, like wastewater, and potentially possibly detected a tiny quantity of pathogen residue and tracked the infectious diseases that originated from human excretions into sewage. Hopefully, with the development of this method and support of measurement and standardization, it is possible to become an effective method to overcome the digital PCR (dPCR) method challenge for surveillance of disease transmission from wastewater.


2021 ◽  
Author(s):  
Ghulam Yaseen

Abstract Background The terms ‘Epidemic’ and ‘Pandemic’ refer to spread of infectious diseases in different countries, nations or regions. Infectious diseases have overrun millions of people in the past, as well as present where the world is facing current coronavirus disease 2019 (Covid-19) pandemic, which has killed more than 607,781 people till July 2020, according to the World Health Organisation. Homeopathy has played an important role in controlling epidemic and pandemic diseases since the time of Hahnemann who cured scarlet fever with Belladonna and served community with best treatment. This article reviews the role of homeopathy in the management and prevention of pandemic and epidemic diseases. Methods A homeopathic literature search was performed using several bibliographic databases such as Google Scholar, PubMed and Google search engine was used for collection of all relevant information from reports, review articles, archived files and web pages etc., published in English language till July 2020. Results Gathered information based on scientific evidences manifested the efficacy of homeopathy using various approaches such as individualisation, Genus epidemicus and isopathy for prevention and treatment of epidemic diseases. Conclusion Homeopathy showcased its effectiveness in reduction of mortality and morbidity in epidemics for years. Moreover, prophylactic use of Genus epidemicus for symptomatic Covid-19 cases can be inexpensive, safe and more realistic.


2021 ◽  
Author(s):  
Wenjia Gu ◽  
Yiwu Zheng ◽  
Taras Pogorelov ◽  
Satish K. Nair ◽  
Eric W. Schmidt

<div><div><div><p>YcaO proteins are ubiquitous in living organisms, where they perform crucial post-translational modifications of peptides and proteins. They are used extensively in biotechnology in companies and academic settings around the world. They also underlie some of the most important natural products in pharmaceutical development, such as thiopeptides (thiostrepton, etc.). Here, we solve one of the major outstanding mysteries behind YcaO proteins: how they exert precision selectivity of the nucleophile. The resulting findings have major implications in understanding the >30,000 YcaO proteins currently in sequencing databases and will be used widely for precision synthetic biology applications.</p></div></div></div>


Author(s):  
Petr Ilyin

Especially dangerous infections (EDIs) belong to the conditionally labelled group of infectious diseases that pose an exceptional epidemic threat. They are highly contagious, rapidly spreading and capable of affecting wide sections of the population in the shortest possible time, they are characterized by the severity of clinical symptoms and high mortality rates. At the present stage, the term "especially dangerous infections" is used only in the territory of the countries of the former USSR, all over the world this concept is defined as "infectious diseases that pose an extreme threat to public health on an international scale." Over the entire history of human development, more people have died as a result of epidemics and pandemics than in all wars combined. The list of especially dangerous infections and measures to prevent their spread were fixed in the International Health Regulations (IHR), adopted at the 22nd session of the WHO's World Health Assembly on July 26, 1969. In 1970, at the 23rd session of the WHO's Assembly, typhus and relapsing fever were excluded from the list of quarantine infections. As amended in 1981, the list included only three diseases represented by plague, cholera and anthrax. However, now annual additions of new infections endemic to different parts of the earth to this list take place. To date, the World Health Organization (WHO) has already included more than 100 diseases in the list of especially dangerous infections.


Author(s):  
N. A. Ilyushina ◽  
Yu. A. Revazova

In order to overcome resistance to individual pesticides and improve their effectiveness, formulations containing two or more active substances are constantly being developed and put on the market over recent years. Mixtures of residual amounts of pesticides can be present in water and food and enter the human and animal bodies. However, the combined effect of pesticides on living organisms, including genetic structures in cells, has not been studied enough and it is not yet possible to predict the genotoxic effects of their mixtures based on available data. The purpose of this review was to collect and summarize literature information on the genotoxicity of pesticide combinations obtained at different objects. The results of studies conducted in different countries of the world are discussed, examples of detected synergistic, additive and antagonistic effects are given, indicating the need for testing the genotoxicity of preparative forms of pesticides containing several active substances, as well as mixtures of jointly used pesticides in order to ensure the safe use of pesticides for public health.


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