scholarly journals COVID-19: General Strategies for Herbal Therapies

2022 ◽  
Vol 27 ◽  
pp. 2515690X2110536
Author(s):  
Samaneh Soleymani ◽  
Ayeh Naghizadeh ◽  
Mehrdad Karimi ◽  
Azadeh Zarei ◽  
Raefeh Mardi ◽  
...  
Keyword(s):  
Natural Products ◽  
Drug Discovery ◽  
Medicinal Plants ◽  
Nigella Sativa ◽  
Management Strategies ◽  
Future Research ◽  
Virus Binding ◽  
New Drug ◽  
Prevention And Treatment ◽  
Ammoides Verticillata

The coronavirus disease-2019 (COVID-19) pandemic started in early 2020 with the outbreak of a highly pathogenic human coronavirus. The world is facing a challenge and there is a pressing need for efficient drugs. Plants and natural compounds are a proven rich resource for new drug discovery. Considering the potential of natural products to manage the pandemic, this article was designed to provide an inclusive map of the stages and pathogenetic mechanisms for effective natural products on COVID-19. New drug discovery for the COVID-19 pandemic can encompass both prevention and disease management strategies. Preventive mechanisms that may be considered include boosting the immune response and hand hygiene in the preexposure phase; and blocking of virus binding and entry in the postexposure phase. Potential therapeutic target mechanisms include virus-directed therapies and host-directed therapies. Several medicinal plants and natural products, such as Withania somnifera (L.) Dunal and propolis for prevention; Tanacetum parthenium (L.) for treatment; and Ammoides verticillata (Desf.) Briq and Nigella sativa L. for both prevention and treatment have been found effective and are good targets for future research. The examples of phytochemical compounds that may be effective include aloin and terpenes as anti-septics; isothymol, dithymoquinone, and glycyrrhizin as inhibitors of virus binding and entry; glycyrrhizin, and berberine as replication suppressants; ginsenoside Rg1 and parthenolide as immunomodulators; and eriocitrin, rhoifolin, hesperidin, naringin, rutin, and veronicastroside as anti-complements. Recognizing different mechanisms of fighting against this virus can lead to a more systematic approach in finding natural products and medicinal plants for COVID-19 prevention and treatment.

scholarly journals UsingDrosophilaas a platform for drug discovery from natural products in Parkinson's disease

MedChemComm ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 867-879 ◽  
Author(s):  
Urmila Maitra ◽  
Lukasz Ciesla
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Natural Products ◽  
Drug Discovery ◽  
Therapeutic Potential ◽  
Natural Extracts ◽  
New Drug ◽  
Screening Platform ◽  
Drug Leads

The review provides an overview of discovery of new drug leads from natural extracts usingDrosophilaas a screening platform to evaluate the therapeutic potential of phytochemicals against Parkinson's disease.

The uniqueness and therapeutic value of natural products from West African medicinal plants, part II: terpenoids, geographical distribution and drug discovery

RSC Advances ◽  
2014 ◽  
Vol 4 (67) ◽  
pp. 35348-35370 ◽  
Author(s):  
Fidele Ntie-Kang ◽  
Lydia L. Lifongo ◽  
Conrad V. Simoben ◽  
Smith B. Babiaka ◽  
Wolfgang Sippl ◽  
...  
Keyword(s):  
Natural Products ◽  
Drug Discovery ◽  
Medicinal Plants ◽  
Geographical Distribution ◽  
Biological Activities ◽  
West African ◽  
Therapeutic Value

In this review series, an attempt has been made to give indepth coverage of natural products derived from West African medicinal plants with diverse biological activities.

scholarly journals Natural products targeting the p53 tumor suppressor-A novel approach for future cancer therapy- A review

2021 ◽  
Vol 1 (2) ◽  
pp. 167-176
Author(s):  
Ali Esmail Al-Snafi
Keyword(s):  
Natural Products ◽  
Cancer Therapy ◽  
Tumor Suppressor ◽  
Medicinal Plants ◽  
Cancer Prevention ◽  
Tumor Suppressor Gene ◽  
Suppressor Gene ◽  
Novel Approach ◽  
Prevention And Treatment ◽  
Expression And Activity

Mutations of p53, a tumor suppressor gene, are known to be involved in multiplication and metastasis of tumors. A number of natural products targeted the p53-MDM2 pathway. This review is an attempt to highlight the medicinal plants that can modulate the expression and activity ofp53tumor suppression, for cancer prevention and treatment.

scholarly journals Are we seeing a resurgence in the use of natural products for new drug discovery?

2019 ◽  
Vol 14 (5) ◽  
pp. 417-420 ◽  
Author(s):  
Feng Li ◽  
Yongli Wang ◽  
Dapeng Li ◽  
Yilun Chen ◽  
Q. Ping Dou
Keyword(s):  
Natural Products ◽  
Drug Discovery ◽  
New Drug

scholarly journals Brine Shrimp Lethality Bioassay: A Tool for Drug Discovery from Natural Products

2020 ◽  
Vol 1 (2) ◽  
pp. 40-48
Author(s):  
George Owusu-Dapaah ◽  
Nicolas I.Y. Fiagbe
Keyword(s):  
Natural Products ◽  
Drug Discovery ◽  
Medicinal Plants ◽  
Bioactive Compounds ◽  
Brine Shrimp ◽  
Structure Activity Relationship ◽  
Activity Relationship ◽  
Brine Shrimp Lethality ◽  
Structure Activity

This study demonstrates the importance of the Brine Shrimp Bioassay in drug discovery. It uses two medicinal plants, Zanthoxylum xanthoxyloides and Tiliacora funifera. Extracts of Zanthoxylum xanthoxyloides were prepared using water, ethanol, chloroform and diethylether, and each subjected to Brine Shrimp Bioassay. The bioactivities of the extracts were found to be in the order diethylether (LD50=0.958 mg/ml), followed by ethanol (LD50=1.874 mg/ml), water(LD50=2.322 mg/ml), and chloroform (3.518 mg/ml). From Tiliacora funifera is isolated the compound funiferine, which is derivatized to obtain o-methylfuniferine and o-isopropylfuniferine. These were subjected to the brine shrimp bioassay, and the structure –activity relationship (SAR) was determined. The results showed that o-isopropylfuniferine is the most bioactive (LD50 = 9.07 mg/ml), followed by o-methylfuniferine (LD50 =38 mg/ml) with funiferine showing the least activity (LD50 =50.25 mg/ml). The SAR of the compounds indicates that the activity of the compounds increases as the size of the group on the phenolic OH is increased, (i.e. isopropyl (C 3 H7 )> methyl (CH3 ) > hydrogen (H)), which suggests that bulkier groups may give more potent compounds. These two results show that the brine shrimp bioassay can be used as a tool in the search for more bioactive compounds from natural products. Keywords: Brine Shrimp Bioassay, Zanthoxylum xanthoxyloides, Funiferine; o-methylfuniferine,o-isopropylfuniferine.

scholarly journals Microbial Biocontrol Strategies for Ambrosia Beetles and Their Associated Phytopathogenic Fungi

2021 ◽  
Vol 5 ◽  
Author(s):  
Frédérique Reverchon ◽  
Silvia M. Contreras-Ramos ◽  
Akif Eskalen ◽  
José A. Guerrero-Analco ◽  
Evangelina E. Quiñones-Aguilar ◽  
...  
Keyword(s):  
Natural Products ◽  
Antifungal Activity ◽  
Management Strategies ◽  
Biocontrol Agents ◽  
Future Research ◽  
Bacterial Strains ◽  
Ambrosia Beetles ◽  
Positive Effects ◽  
Microbial Natural Products

Ambrosia beetles and their symbiotic fungi are causing severe damage in natural and agro-ecosystems worldwide, threatening the productivity of several important tree crops such as avocado. Strategies aiming at mitigating their impact include the application of broad-spectrum agrochemicals and the incineration of diseased trees, but the increasing demand for environment-friendly strategies call for exploring biological control for the management of ambrosia beetles and their phytopathogenic fungal symbionts. The aim of this review is to examine the existing knowledge on biocontrol approaches using beneficial microorganisms and microbial natural products with entomopathogenic and antifungal activity against ambrosia beetles and fungi. We show that biocontrol has been mainly focused on the insect, using entomopathogenic fungi (EPF) such as Beauveria spp. or Metarhizium spp. However, recent studies have been integrating EPF with mycoparasitic fungi such as Trichoderma spp. to simultaneously challenge the vector and its fungal symbionts. Novel approaches also include the use of microbial natural products as insect lures or antifungal agents. Contrastingly, the potential of bacteria, including actinobacteria (actinomycetes), as biocontrol agents of ambrosia fungi has been little investigated. We thus suggest that future research should further examine the antifungal activity of bacterial strains, with an emphasis on harsh environments. We also suggest pursuing the isolation of more effective microbial strains with dual biocontrol effect, i.e., exhibiting fungicidal/insecticidal activities. Moreover, additional efforts should aim at determining the best application methods of biocontrol agents in the field to ensure that the positive effects detected in vitro are sustained. Finally, we propose the integration of microbiome studies in pest and disease management strategies as they could provide us with tools to steer the beneficial host plant microbiome and to manipulate the beetle microbiome in order to reduce insect fitness.

Anti-Ulcer Activities of Medicinal Plants and Natural Products

2020 ◽  
pp. 114-127
Author(s):  
Madhu Rani ◽  
Rubina Chongtham ◽  
Ajeet Singh
Keyword(s):  
Natural Products ◽  
Peptic Ulcer ◽  
Medicinal Plants ◽  
Plant Species ◽  
Health Problem ◽  
Peptic Ulcers ◽  
Mucosal Defense ◽  
The World ◽  
Prevention And Treatment

The peptic ulcer is a widespread and common health problem around the world. The major causes include generation of free radicles, decrease in mucosal defense factor, or increase in mucosal injurious factors. Various plants and their products have been known to prevent or reduce peptic ulcers. Natural products from plants are a rich resource used for centuries to cure different ailments. The use of phyto-constituents as drugs has proved to be clinically effective and less toxic than existing drugs. An attempt has been made to review some plant species and their products as phytomedicines showing promising results in prevention and treatment of peptic ulcers.

scholarly journals Multicomponent Domino Reaction in the Asymmetric Synthesis of Cyclopentan[c]pyran Core of Iridoid Natural Products

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1308
Author(s):  
Alejandro Manchado ◽  
Victoria Elena Ramos ◽  
David Díez ◽  
Narciso M. Garrido
Keyword(s):  
Natural Products ◽  
Drug Discovery ◽  
Asymmetric Synthesis ◽  
Heteronuclear Nmr ◽  
Domino Reaction ◽  
One Pot ◽  
Pharmaceutical Development ◽  
New Drug ◽  
Anti Inflammatory ◽  
Pharmaceutical Properties

The asymmetric synthesis of a compound with the cyclopentan[c]pyran core of iridoid natural products in four steps and 40% overall yield is reported. Our methodology includes a one-pot tandem domino reaction which provides a trisubstituted cyclopentane with five new completely determined stereocenters, which were determined through 2D homo and heteronuclear NMR and n.O.e. experiments on different compounds specially designed for this purpose, such as a dioxane obtained from a diol. Due to their pharmaceutical properties, including sedative, analgesic, anti-inflammatory, CNS depressor or anti-conceptive effects, this methodology to produce the abovementioned iridoid derivatives, is an interesting strategy in terms of new drug discovery as well as pharmaceutical development.

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