scholarly journals New phenol and chromone derivatives from the endolichenic fungus Daldinia species and their antiviral activities

RSC Advances ◽  
2021 ◽  
Vol 11 (36) ◽  
pp. 22489-22494
Author(s):  
Dewu Zhang ◽  
Guowei Gu ◽  
Bingyuan Zhang ◽  
Yujia Wang ◽  
Jinglin Bai ◽  
...  
Keyword(s):  
Chromone Derivatives ◽  
Endolichenic Fungus ◽  
Antiviral Activities

Eight phenols including three new ones (1–3) and four chromones including two new ones (9 and 10) were isolated from endolichenic fungus Daldinia sp. CPCC 400770, and some of them showed significant antiviral activities.

A Thiopyranchromenone and Other Chromone Derivatives from an Endolichenic Fungus, Preussia africana

2012 ◽  
Vol 75 (2) ◽  
pp. 230-237 ◽  
Author(s):  
Fan Zhang ◽  
Li Li ◽  
Shubin Niu ◽  
Yikang Si ◽  
Liangdong Guo ◽  
...  
Keyword(s):  
Chromone Derivatives ◽  
Endolichenic Fungus

Synthesis of novel 3-(substituted phenyl) chromone derivatives and their anti-tumor activities

2010 ◽  
Vol 30 (8) ◽  
pp. 864-869
Author(s):  
Huan-wen DONG ◽  
Yue-li ZHANG ◽  
Jue-ying LIU ◽  
Zhen-hua QUAN ◽  
Tie-jun LI ◽  
...  
Keyword(s):  
Chromone Derivatives

Discovery of Some Antiviral Natural products to fight against Novel Corona Virus (SARS-CoV-2) using Insilico approach

2020 ◽  
Vol 23 ◽  
Author(s):  
Ashish Shah ◽  
Vaishali Patel ◽  
Bhumika Parmar
Keyword(s):  
Binding Affinity ◽  
Protein S ◽  
Docking Studies ◽  
Spike Protein ◽  
Enveloped Viruses ◽  
Bioactivity Prediction ◽  
Corona Virus ◽  
Main Protease ◽  
Antiviral Activities ◽  
Deadly Disease

Background: Novel Corona virus is a type of enveloped viruses with a single stranded RNA enclosing helical nucleocapsid. The envelope consists of spikes on the surface which are made up of proteins through which virus enters into human cells. Until now there is no specific drug or vaccine available to treat COVID-19 infection. In this scenario, reposting of drug or active molecules may provide rapid solution to fight against this deadly disease. Objective: We had selected 30 phytoconstituents from the different plants which are reported for antiviral activities against corona virus (CoVs) and performed insilico screening to find out phytoconstituents which have potency to inhibit specific target of novel corona virus. Methods: We had perform molecular docking studies on three different proteins of novel corona virus namely COVID-19 main protease (3CL pro), papain-like protease (PL pro) and spike protein (S) attached to ACE2 binding domain. The screening of the phytoconstituents on the basis of binding affinity compared to standard drugs. The validations of screened compounds were done using ADMET and bioactivity prediction. Results: We had screened five compounds biscoclaurine, norreticuline, amentoflavone, licoricidin and myricetin using insilico approach. All compounds found safe in insilico toxicity studies. Bioactivity prediction reviles that these all compounds may act through protease or enzyme inhibition. Results of compound biscoclaurine norreticuline were more interesting as this biscoclaurine had higher binding affinity for the target 3CLpro and PLpro targets and norreticuline had higher binding affinity for the target PLpro and Spike protein. Conclusion: Our study concludes that these compounds could be further explored rapidly as it may have potential to fight against COVID-19.

Carbohydrate-Binding Agents: Potential of Repurposing for COVID-19 Therapy

2020 ◽  
Vol 21 (11) ◽  
pp. 1085-1096 ◽  
Author(s):  
Rajesh Kumar Gupta ◽  
Girish R. Apte ◽  
Kiran Bharat Lokhande ◽  
Satyendra Mishra ◽  
Jayanta K. Pal
Keyword(s):  
Vaccine Development ◽  
Host Cells ◽  
Carbohydrate Binding ◽  
Atypical Pneumonia ◽  
The Novel ◽  
High Infection ◽  
Binding Agents ◽  
Current Scenario ◽  
Antiviral Activities ◽  
Novel Drug

: With the emergence of the novel severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), the whole world is suffering from atypical pneumonia, which resulted in more than 559,047 deaths worldwide. In this time of crisis and urgency, the only hope comes from new candidate vaccines and potential antivirals. However, formulating new vaccines and synthesizing new antivirals are a laborious task. Therefore, considering the high infection rate and mortality due to COVID-19, utilization of previous information, and repurposing of existing drugs against valid viral targets have emerged as a novel drug discovery approach in this challenging time. The transmembrane spike (S) glycoprotein of coronaviruses (CoVs), which facilitates the virus’s entry into the host cells, exists in a homotrimeric form and is covered with N-linked glycans. S glycoprotein is known as the main target of antibodies having neutralizing potency and is also considered as an attractive target for therapeutic or vaccine development. Similarly, targeting of N-linked glycans of S glycoprotein envelope of CoV via carbohydrate-binding agents (CBAs) could serve as an attractive therapeutic approach for developing novel antivirals. CBAs from natural sources like lectins from plants, marine algae and prokaryotes and lectin mimics like Pradimicin-A (PRM-A) have shown antiviral activities against CoV and other enveloped viruses. However, the potential use of CBAs specifically lectins was limited due to unfavorable responses like immunogenicity, mitogenicity, hemagglutination, inflammatory activity, cellular toxicity, etc. Here, we reviewed the current scenario of CBAs as antivirals against CoVs, presented strategies to improve the efficacy of CBAs against CoVs; and studied the molecular interactions between CBAs (lectins and PRM-A) with Man9 by molecular docking for potential repurposing against CoVs in general, and SARSCoV- 2, in particular.

Potentials of Diphenyl Ether Scaffold as a Therapeutic Agent: A Review

2019 ◽  
Vol 19 (17) ◽  
pp. 1392-1406
Author(s):  
Suvarna G. Kini ◽  
Ekta Rathi ◽  
Avinash Kumar ◽  
Varadaraj Bhat
Keyword(s):  
Therapeutic Agent ◽  
Diphenyl Ether ◽  
Biological Properties ◽  
Industrial Applications ◽  
Synthetic Route ◽  
Structure Activity ◽  
Diphenyl Ethers ◽  
Antiviral Activities ◽  
Synthetic Routes ◽  
The 19Th Century

Diphenyl ethers (DPE) and its analogs have exhibited excellent potential for therapeutic and industrial applications. Since the 19th century, intensive research is perpetuating on the synthetic routes and biological properties of DPEs. Few well-known DPEs are Nimesulide, Fenclofenac, Triclosan, Sorafenib, MK-4965, and MK-1439 which have shown the potential of this moiety as a lead scaffold for different pharmacological properties. In this review, we recapitulate the diverse synthetic route of DPE moiety inclusive of merits and demerits over the classical synthetic route and how this moiety sparked an interest in researchers to discern the SAR (Structure Activity Relationship) for the development of diversified biological properties of DPEs such as antimicrobial, antifungal, antiinflammatory & antiviral activities.

Punica granatum as a Source of Natural Antioxidant and Antimicrobial Agent; a Comprehensive Review on Related Investigations

2020 ◽  
Vol 17 ◽  
Author(s):  
Atefeh Jalali ◽  
Mohammadreza Kiafar ◽  
Masih Seddigh ◽  
Mohammad M. Zarshenas
Keyword(s):  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Natural Antioxidants ◽  
Punica Granatum ◽  
Antimicrobial Activities ◽  
Natural Antioxidant ◽  
Antiviral Activities ◽  
Natural Foods

Background: The consumption of natural antioxidants is increasing due to the demand and tendency to natural foods. Punica granatum L. [Punicaceae] is a fruit with various bioactive ingredients. The effectiveness of this plant has been proved against various disorders such as hyperglycemia, hyperlipidemia, blood coagulation, infections, cancer, and dentistry. Among them, there are numerous researches on antimicrobial and antioxidant properties. Subsequently, the present study aimed to compile a review of those properties to outline this herb as a possible natural antioxidant and preservative. Methods: Synchronically, keywords "Punica granatum" with antimicrobial, or antibacterial, antifungal, antiviral, antioxidant and radical scavenging were searched through "Scopus" database up to 31st September 2019. Papers focusing on agriculture, genetics, chemistry, and environmental sciences were excluded and also related papers were collected. Results: Among 201 papers focusing on related activities, 111 papers have dealt with antioxidant activities focusing based on DPPH assay, 59 with antibacterial, on both gram+ and gram- bacteria, 24 with antifungal effects, mostly on Aspergillus niger and Candida albicans, and 7 papers with antiviral activities. There were about 50 papers focusing on in-vivo antioxidant activities of this plant. Conclusion: Taken together, botanical parts of P. granatum have possessed notable radical scavenging and antimicrobial activities that with these properties, this plant can be introduced as a natural safe source of preservative and antioxidant. Accordingly, P. granatum can be applied as excipient with the aforementioned properties in the pharmaceutical and food industries.

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