Screening of Endophytes from Traditionally Used Medicinal Plants of Manipur for Their Antimicrobial Activity An Impact towards Future Drug Discovery

Ipomoea staphylina Roem. & Schult.A plant belonging to Convolvulaceae is commonly found on hedges and bushes in the forests and wastelands. It is a perennial, woody and glabrous shrub with pink flowers. Traditionally Ipomoea staphylina is used for respiratory disorders. Traditionally genus Ipomoea is used as purgative, dyspepsia, anthelmintic, bronchitis. Medicinal plants are the primary sources of medicines in Ayurvedha, Siddha, and Folk medicine systems. In India, about 95% of all modern drugs are derived from medicinal plants and very likely most of these medicines are used by people to cure many ailments. The Ayurvedic literature Sarangdhar Samhita" highlighted the concept of polyherbalism to achieve greater therapeutic efficacy. The active phytochemical constituents of individual plants are insufficient to meet the desirable therapeutic effects.When combining the multiple herbs in a particular ratio, it will give a better therapeutic effect and reduce the toxicity. Most of them are active even at a low dose and safe at a high dose. Thus they have superior risk to benefit ratio. Based on this the present study deals with physicochemical, phytochemical studies such as and biochemical estimation of medicinal plant of a combined mixture of polyherbal Ipomoea staphylina., also study evaluates the ethanol and methanol extracts of leaf and stem for their preliminary phytochemical analysis, antibacterial and antifungal activity. In the study of the phytochemical analysis reveals the presence of carbohydrate, protein, flavonoids, glycosides, alkaloids. The Ipomoea staphylina of ethanolic leaf and stem extract showed potent antimicrobial activity in all the tested concentrations against E.coli, Staphylococcus aureus, Bacillus subtilis and Aspergillus niger.Ipomoea staphylina could be exploited as a valuable source of antibacterial agent enriching with known antimicrobial compounds. Further studies needed for future drug development to treat various infectious diseases by microbes.

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Compounds from African Medicinal Plants with Activities against Protozoal Diseases: Schistosomiasis, Trypanosomiasis and Leishmaniasis

10.20944/preprints201801.0292.v1 ◽

2018 ◽

Author(s):

Conrad V. Simoben ◽

Fidele Ntie-Kang ◽

Sergi H. Akone ◽

Wolfgang Sippl

Keyword(s):

Drug Discovery ◽

Medicinal Plants ◽

Drug Development ◽

Leishmania Species ◽

Global Scale ◽

Parasitic Diseases ◽

The World ◽

Future Drug ◽

Further Development ◽

Micromolar Range

Parasitic diseases continue represent a threat on a global scale, particularly among the poorest countries in the world. This is particularly because of the absence of vaccines, and in some cases, resistance against available drugs, currently being used for their treatment. In this review emphasis is laid on natural products and scaffolds from African medicinal plants (AMPs) for lead drug discovery and possible further development of drugs for the treatment of parasitic diseases. In the discussion, emphasis has been laid on alkaloids, terpenoids, quinones, flavonoids and narrower compound classes of compounds with micromolar range activities against Schistosoma, Trypanosoma and Leishmania species. Suggestions for future drug development from African medicinal plants have also been provided.

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Compound Prioritization through Meta-Analysis Enhances the Discovery of Antimicrobial Hits against Bacterial Pathogens

Antibiotics ◽

10.3390/antibiotics10091065 ◽

2021 ◽

Vol 10 (9) ◽

pp. 1065

Author(s):

Loic Deblais ◽

Gireesh Rajashekara

Keyword(s):

Antimicrobial Activity ◽

Drug Discovery ◽

In Silico ◽

Plant Pathogens ◽

Bacterial Pathogens ◽

Meta Analysis ◽

Chemical Properties ◽

Molar Refraction ◽

In Silico Model ◽

Future Drug

The development of informatic tools to improve the identification of novel antimicrobials would significantly reduce the cost and time of drug discovery. We previously screened several plant (Xanthomonas sp., Clavibacter sp., Acidovorax sp., and Erwinia sp.), animal (Avian pathogenic Escherichia coli and Mycoplasma sp.), and human (Salmonella sp. and Campylobacter sp.) pathogens against a pre-selected small molecule library (n = 4182 SM) to identify novel SM (hits) that completely inhibited the bacterial growth or attenuated at least 75% of the virulence (quorum sensing or biofilm). Our meta-analysis of the primary screens (n = 11) using the pre-selected library (approx. 10.2 ± 9.3% hit rate per screen) demonstrated that the antimicrobial activity and spectrum of activity, and type of inhibition (growth versus virulence inhibitors) correlated with several physico-chemical properties (PCP; e.g., molecular weight, molar refraction, Zagreb group indexes, Kiers shape, lipophilicity, and hydrogen bond donors and acceptors). Based on these correlations, we build an in silico model that accurately classified 80.8% of the hits (n = 1676/2073). Therefore, the pre-selected SM library of 4182 SM was narrowed down to 1676 active SM with predictable PCP. Further, 926 hits affected only one species and 1254 hits were active against specific type of pathogens; however, no correlation was detected between PCP and the type of pathogen (29%, 34%, and 46% were specific for animal, human foodborne and plant pathogens, respectively). In conclusion, our in silico model allowed rational identification of SM with potential antimicrobial activity against bacterial pathogens. Therefore, the model developed in this study may facilitate future drug discovery efforts by accelerating the identification of uncharacterized antimicrobial molecules and predict their spectrum of activity.

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Extraction and Phytochemicals Determination of Traditional Medicinal Plants for Anti-microbial Susceptibility Test

Health Sciences ◽

10.15342/hs.2020.236 ◽

2020 ◽

Vol 2020 ◽

Author(s):

Firew Admasu

Keyword(s):

Antimicrobial Activity ◽

Medicinal Plants ◽

Traditional Medicine ◽

Crude Extract ◽

Susceptibility Test ◽

Plant Sample ◽

Traditional Medicinal Plants ◽

Traditional Health Care ◽

Susceptibility Tests

Abstract: The study were conducted at Dilla University, College of Natural Sciences, Biological Sciences laboratories. Background: Ethiopia is a country with many ethnic groups, cultures and beliefs which in turn have contributed to the high diversity of traditional health care knowledge and practices of traditional medicine from local growth plants, animals and minerals for various physical and mental disorders of human and livestock population that passed from generation to generation for centuries. Medicinal plants contributors to pharmaceutical, agricultural and food industries in the world. The use of medicinal plants in the industrialized societies has been traced to extraction and development of several drugs used in order to heel some diseases having inhibiting effect against pathogenic microorganism. Objective: The main objective of this study was Extraction and Phytochemicals determination of traditional medicinal plants for anti microbial susceptibility test. Methodology: The extraction and identification of some phytochemicals crude compound which used for antimicrobial susceptibility test from plant sample such as Ocimum lamiifolium (OL), Croton maerosth (Cm) and Ruta chalepesis (RC) were conducted. Plant samples are collected, powdered using mortal and pistil and extracted using ethanol and some susceptibility tests were performed to identify some phytochemicals compound. Result: The main result of Antimicrobial activity test showed that the crude extract of OL has the highest zone of inhibition. The highest yield of crude extract (38.21%) was obtained from Croton maerosth (CM) which followed by Ruta chalepesis (RC) (32.43%). However, the lowest yield (28.37%) was obtained from Oscpmum lamifolium (OL). Conclusion: Traditional Medicine is used by many people to managing numerous conditions; it’s accessible and effective on antimicrobial activity. Therefore, it plays a significant role by reducing life-threatening ailments of people and other animals.

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Design, Synthesis and Docking Studies of Some Novel Fluoroquinolone Compounds with Antibacterial Activity

Revista de Chimie ◽

10.37358/rc.18.4.6207 ◽

2018 ◽

Vol 69 (4) ◽

pp. 815-822 ◽

Cited By ~ 1

Author(s):

Lucia Pintilie ◽

Amalia Stefaniu ◽

Alina Ioana Nicu ◽

Maria Maganu ◽

Miron Teodor Caproiu

Keyword(s):

Antimicrobial Activity ◽

Antibacterial Activity ◽

Molecular Docking ◽

Drug Discovery ◽

Elemental Analysis ◽

Docking Studies ◽

Receptor Protein ◽

Chemical Methods ◽

Design Synthesis ◽

Gram Negative

A new series of fluoroquinolone compounds have been obtained by Gould-Jacobs method. The compounds have been characterized by physic-chemical methods (elemental analysis, FTIR, NMR, UV-Vis) and by antimicrobial activity against Gram-positive and Gram-negative microorganisms. For the synthesized compounds have been performed calculations of characteristics and molecular properties, using Spartan�14 Software from Wavefunction, Inc. Irvine, CA. and molecular docking studies using CLC Drug Discovery Workbench 2.4 software, to identify and visualize the most likely interaction ligand (fluoroquinolone) with the receptor protein.

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Arrayed CRISPR reveals genetic regulators of tau aggregation, autophagy and mitochondria in Alzheimer’s disease model

Scientific Reports ◽

10.1038/s41598-021-82658-7 ◽

2021 ◽

Vol 11 (1) ◽

Cited By ~ 1

Author(s):

Lishu Duan ◽

Mufeng Hu ◽

Joseph A. Tamm ◽

Yelena Y. Grinberg ◽

Fang Shen ◽

...

Keyword(s):

Alzheimer’S Disease ◽

Alzheimer's Disease ◽

Drug Discovery ◽

Disease Model ◽

Mitochondrial Morphology ◽

Individual Gene ◽

Human Genes ◽

Future Drug ◽

Tau Aggregation

AbstractAlzheimer’s disease (AD) is a common neurodegenerative disease with poor prognosis. New options for drug discovery targets are needed. We developed an imaging based arrayed CRISPR method to interrogate the human genome for modulation of in vitro correlates of AD features, and used this to assess 1525 human genes related to tau aggregation, autophagy and mitochondria. This work revealed (I) a network of tau aggregation modulators including the NF-κB pathway and inflammatory signaling, (II) a correlation between mitochondrial morphology, respiratory function and transcriptomics, (III) machine learning predicted novel roles of genes and pathways in autophagic processes and (IV) individual gene function inferences and interactions among biological processes via multi-feature clustering. These studies provide a platform to interrogate underexplored aspects of AD biology and offer several specific hypotheses for future drug discovery efforts.

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Studies on Phytochemical, Antimicrobial activity and Micro propagation of Medicinal plants from Eastern Ghats of Andhra Pradesh

Asian Journal of Pharmacy and Technology ◽

10.52711/2231-5713.2021.00018 ◽

2021 ◽

pp. 111-115

Author(s):

Darsi Phebe Sarah Koti Ratnam

Keyword(s):

Antimicrobial Activity ◽

Medicinal Plants ◽

Andhra Pradesh ◽

Eastern Ghats ◽

Total Phenolic ◽

Rauwolfia Serpentina ◽

Alstonia Scholaris ◽

Soxhlet Apparatus ◽

Medicinal Plant Extracts ◽

Micro Propagation

The aim of the present study was to investigate the presence of phyto chemical, antimicrobial activities and micro propagation of the selected medicinal plants i.e. Rauwolfia serpentina, Adhatoda vasica and Alstonia scholaris. These endemic plants belong to Apocynaceae and were collected from higher altitudes of Eastern Ghats, Lambasingi forest region, Andhra Pradesh India. To determine the total phenolic and flavonoid contents, Soxhlet apparatus was used for this study. Solvents used were in this study are water, ethyl acetate, chloroform and methanol. Among them the solvent methanolic extract of Rauwolfia serpentina (57.15±1.2) and Alstonia scholaris (55.06±0.7) showed high content of saponins. The test microrganism which were studied against the efficacy of selected medicinal plant extracts were, two bacterial strians i.e., Streptococcus pyogenes, Pseudomonas aeruginosa and two fungal strains Aspergillus niger and Vibrio cholera. The antimicrobial activity was proved that the methanol extracts was found to be maximum antimicrobial growth inhibition. The simple and effective protocol was developed to propagate the Rauwolfia plant from nodal explants. Maximum no of 95% plantlets regenerated successfully. These propagated plantlets were hardened to survive in vivo conditions.

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