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1.
Viruses ; 14(10)2022 10 14.
Статья в английский | MEDLINE | ID: covidwho-2071837

Реферат

Ficus rubiginosa plant extract showed antimicrobial activity, but no evidence concerning its antiviral properties was reported. The antiviral activity of the methanolic extract (MeOH) and its n-hexane (H) and ethyl acetate (EA) fractions against Herpes simplex virus-1 (HSV-1), Human coronavirus (HCoV) -229E, and Poliovirus-1 (PV-1) was investigated in the different phases of viral infection in the VERO CCL-81 cell line. To confirm the antiviral efficacy, a qPCR was conducted. The recorded cytotoxic concentration 50% was 513.1, 298.6, and 56.45 µg/mL for MeOH, H, and EA, respectively, assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay after 72 h of treatment. The Ficus rubiginosa leaf extract inhibited the replication of HSV-1 in the early stages of infection, showing a complete inhibition up to 0.62, 0.31, and 1.25 µg/mL. Against HCoV-229E, a total inhibition up to 1.25 µg/mL for MeOH and H as well as 5 µg/mL for EA was observed. Otherwise, no activity was recorded against PV-1. The leaf extract could act directly on the viral envelope, destructuring the lipid membrane and/or directly blocking the enriched proteins on the viral surface. The verified gene inhibition suggested that the treatments with M, H, and EA impaired HSV-1 and HCoV-229E replication, with a greater antiviral efficiency against HSV-1 compared to HCoV-229E, possibly due to a greater affinity of Ficus rubiginosa towards membrane glycoproteins and/or the different lipid envelopes.


Тема - темы
Coronavirus 229E, Human , Ficus , Herpesvirus 1, Human , Poliovirus , Humans , Antiviral Agents/pharmacology , Bromides , Plant Extracts/pharmacology , Membrane Glycoproteins , Lipids
2.
Food Funct ; 13(21): 11083-11096, 2022 Oct 31.
Статья в английский | MEDLINE | ID: covidwho-2069897

Реферат

Otomycosis is a serious superficial mycotic infection of the outer ear canal caused by some pathogenic species of Candida and Aspergillus. The infection remains a challenge to clinicians owing to the incomplete efficacy of market-available antifungal agents and high recurrence rates. The Moringa oleifera leaf ethanol extract showed efficacy against Candida albicans SC5314, compared to Nystatin® as a reference with MIC values of 7 and 718.33 µg ml-1, respectively. The extract was mixed with lecithin and chitosan to give Moringa core/shell giant nanoparticles, with a good zeta potential (+59.2 mV), a suitable entrapment efficiency (61%) and an enhanced release reaching up to 90% at 8 h. Clinical isolates from oomycote patients were identified via DNA sequencing as Candida parapsilosis, Aspergillus niger and Aspergillus flavus, and the effect of the prepared nanoparticles was tested against them via disk diffusion assay to give inhibition zones of 75, 55 and 55 mm, compared to Nystatin® with 35, 25 and 20 mm, respectively. Interestingly, patients treated with the Moringa-loaded nanoparticles experienced improvement within 1 week with no recurrence for more than 3 months. To have some insight into the bioactive components in the Moringa extract, LC-HRMS-based identification has been employed which led to the annotation of 27 compounds. Subsequent comprehensive in silico investigation suggested some alkaloids to be responsible for the activity targeting the fungal 14-α-demethylase enzyme (CYP51B). Our study revealed that Moringa extract-loaded nanoparticles attained an enhanced antifungal efficacy compared to Nystatin® and therefore they can be employed against invasive and drug-resistant otomycotic infections.


Тема - темы
Anti-Infective Agents , Moringa oleifera , Nanoparticles , Otomycosis , Humans , Nystatin/pharmacology , Antifungal Agents/pharmacology , Anti-Infective Agents/pharmacology , Plant Extracts/pharmacology
3.
Carbohydr Polym ; 297: 120032, 2022 Dec 01.
Статья в английский | MEDLINE | ID: covidwho-2068751

Реферат

The cytokine storm is highly associated with inflammatory-type disease severity and patients' survival. Plant polysaccharides, the main natural phytomedicine source, have a great potential to be an effective drug to treat cytokine storm. Herein we found that a polymeric acemannan (ABPA1) isolated from Aloe Vera Barbadensis extract C (AVBEC) exerted prominent inhibitory effects on inflammation-induced cytokine storm. The results displayed that ABPA1 effectively suppressed LPS-induced proinflammatory cytokines release in vitro. Moreover, ABPA1 treatment alleviated the cytokine storm and tissue damage in LPS- and IAV-induced mouse pneumonia models, and altered the phenotypic balance of macrophages in lung tissues. Functionally, ABPA1 enhanced macrophage M2 polarization and phagocytosis in RAW264.7 cells and inhibited LPS-induced M1 polarization. Mechanistically, ABPA1 enhanced mitochondrial metabolism and OXPHOS through activated PI3K/Akt/GSK-3ß signalling pathway. Overall, our findings suggest that ABPA1 may modulate macrophage activation and mitochondrial metabolism by targeting PI3K/Akt/GSK-3ß signalling pathway, thereby alleviating cytokine storm and inflammation.


Тема - темы
Aloe , Aloe/metabolism , Animals , Cytokine Release Syndrome , Cytokines/metabolism , Glycogen Synthase Kinase 3 beta/metabolism , Lipopolysaccharides/pharmacology , Macrophages , Mannans , Mice , Phosphatidylinositol 3-Kinases/metabolism , Plant Extracts/pharmacology , Polysaccharides/pharmacology , Proto-Oncogene Proteins c-akt/metabolism
4.
Int J Mol Sci ; 23(19)2022 Sep 23.
Статья в английский | MEDLINE | ID: covidwho-2066118

Реферат

Echinacea purpurea (L.) Moench is one of the most economically important medicinal plants, cultivated worldwide for its high medicinal value and with several industrial applications in both pharmaceutical and food industries. Thanks to its various phytochemical contents, including caffeic acid derivatives (CADs), E. purpurea extracts have antioxidant, anti-inflammatory, and immuno-stimulating properties. Among CADs, chicoric acid is one of the most important compounds which have shown important pharmacological properties. The present research was aimed at optimizing the production of chicoric acid in E. purpurea cell culture. Methyl jasmonate (MeJa) at different concentrations and for different duration of treatments was utilized as elicitor, and the content of total polyphenols and chicoric acid was measured. Several genes involved in the chicoric acid biosynthetic pathway were selected, and their expression evaluated at different time points of cell culture growth. This was performed with the aim of identifying the most suitable putative molecular markers to be used as a proxy for the early prediction of chicoric acid contents, without the need of expensive quantification methods. A correlation between the production of chicoric acid in response to MeJa and an increased response to oxidative stress was also proposed.


Тема - темы
Biological Products , Echinacea , Acetates , Antioxidants/metabolism , Biological Products/metabolism , Caffeic Acids , Cell Culture Techniques , Cyclopentanes , Echinacea/chemistry , Echinacea/metabolism , Oxylipins , Pharmaceutical Preparations/metabolism , Plant Extracts/metabolism , Plant Extracts/pharmacology , Succinates
5.
Front Public Health ; 10: 964741, 2022.
Статья в английский | MEDLINE | ID: covidwho-2065648

Реферат

Arisaema jacquemontii Blume is a highly medicinal and poisonous plant belong to the family Araceae. It is used to treat several deadly diseases, including viral infections. It has antioxidant, anti-cancerous, antimalarial, anti-vermicidal, and antiviral activities. Therefore, five parts of the Arisaema jacquemontii Blume plant, such as leaf, seed, stem, pulp, and rhizome extract, were evaluated for metabolic and in silico characterization of probable compounds using gas chromatography-mass spectrometry (GC-MS) analysis. A total of 22 compounds were isolated from the methanolic extracts of A. jacquemontii Blume. A selected antiviral COVID-19 protein i.e., protease (6LU7) was docked against the obtained compounds. Different affinities were obtained through various compounds. The best results were shown by three different compounds identified in the rhizome. The maximum binding affinity of these compounds is 8.1 kJ/mol. Molecular docking (MD) indicate that these molecules have the highest binding energies and hydrogen bonding interactions. The binding mode of interaction was discovered to be reasonably effective for counteracting the SARS virus COVID-19. The findings of this study could be extremely useful in the development of more phytochemical-based COVID-19 therapeutics.


Тема - темы
Antimalarials , Arisaema , COVID-19 , Antioxidants , Antiviral Agents/pharmacology , Arisaema/chemistry , COVID-19/drug therapy , Molecular Docking Simulation , Peptide Hydrolases , Phytochemicals/chemistry , Phytochemicals/pharmacology , Plant Extracts/chemistry , Plant Extracts/pharmacology
6.
Am J Case Rep ; 23: e937094, 2022 Sep 26.
Статья в английский | MEDLINE | ID: covidwho-2056387

Реферат

BACKGROUND Cognitive symptoms persisting longer than 3 months after infection, such as memory loss, or difficulties concentrating, have been reported in up to one-third of patients after COVID-19. Evidence-based therapeutic interventions to treat post-COVID-19 symptoms (also called "Long-COVID symptoms") have not yet been established, and the treating physicians must rely on conjecture to help patients. Based on its mechanism of action and its efficacy in treating cognitive impairment, as well as its good tolerability, the Ginkgo biloba special extract EGb 761 has been suggested as a remedy to alleviate cognitive post-COVID-19 symptoms. In many studies, EGb 761 has been demonstrated to protect endothelial cells, to have potent anti-inflammatory effects, and to enhance neuroplasticity. CASE REPORT Here, we report for the first time the application of EGb 761 in the therapy of post-COVID-19-related cognitive deficits. Three women and 2 men, aged 26 to 59 years (average age 34.6 years), presented with concentration and attention deficits, cognitive deficiencies, and/or fatigue 9-35 weeks after infection. A daily dose of 2×80 mg of EGb 761 did not cause any detectable adverse effects, and it substantially improved or completely restored cognitive deficits and, when initially present, also other symptoms, such as fatigue and hyposmia, within an observation period of up to 6 months. CONCLUSIONS Our observations support the hypothesis that EGb 761 might be a low-risk treatment option for post-COVID-19 patients with cognitive symptoms. Moreover, we derive recommendations for randomized controlled clinical trials to confirm efficacy in that indication.


Тема - темы
COVID-19 , Cognitive Dysfunction , Adult , Anti-Inflammatory Agents/therapeutic use , COVID-19/complications , Cognition , Cognitive Dysfunction/drug therapy , Cognitive Dysfunction/etiology , Endothelial Cells , Fatigue , Female , Ginkgo biloba , Humans , Male , Plant Extracts/pharmacology , Plant Extracts/therapeutic use
7.
Naunyn Schmiedebergs Arch Pharmacol ; 395(12): 1525-1536, 2022 Dec.
Статья в английский | MEDLINE | ID: covidwho-2048210

Реферат

Aloe vera (L.) Burm.f. is nicknamed the 'Miracle plant' or sometimes as the 'Wonder plant'. It is a plant that has been used since ancient times for the innumerable health benefits associated with it. It is one of the important plants that has its use in conventional medicinal treatments. It is a perennial succulent, drought-tolerant member of the family Asphodelaceae. There are scores of properties associated with the plant that help in curing various forms of human ailments. Extracts and gels obtained from plants have been shown to be wonderful healers of different conditions, mainly various skin problems. Also, this plant is popular in the cosmetics industry. The underlying properties of the plant are now mainly associated with the natural phytochemicals present in the plant. Diverse groups of phytoingredients are found in the plant, including various phenolics, amino acids, sugars, vitamins, and different other organic compounds, too. One of the primary ingredients found in the plant is the aloin molecule. It is an anthraquinone derivative and exists as an isomer of Aloin A and Aloin B. Barbaloin belonging to the first group is a glucoside of the aloe-emodin anthrone molecule. Various types of pharmacological properties exhibited by the plant can be attributed to this chemical. Few significant ones are antioxidant, anti-inflammatory, anti-diabetic, anti-cancer, anti-microbial, and anti-viral, along with their different immunity-boosting actions. Recently, molecular coupling studies have also found the role of these molecules as a potential cure against the ongoing COVID-19 disease. This study comprehensively focuses on the numerous pharmacological actions of the primary compound barbaloin obtained from the Aloe vera plant along with the mechanism of action and the potent application of these natural molecules under various conditions.


Тема - темы
Aloe , COVID-19 , Humans , Aloe/chemistry , Anthracenes/pharmacology , Phytochemicals/pharmacology , Plant Extracts/pharmacology , Plant Extracts/chemistry
8.
Molecules ; 27(16)2022 Aug 20.
Статья в английский | MEDLINE | ID: covidwho-2023938

Реферат

Herein, we report our success synthesizing silver nanoparticles (AgNPs) using aqueous extracts from the leaves and flowers of Calotropis gigantea growing in the geothermal manifestation Ie Seu-Um, Aceh Besar, Indonesia. C. gigantea aqueous extract can be used as a bio-reductant for Ag+→Ag0 conversion, obtained by 48h incubation of Ag+, and the extract mixture in a dark condition. UV-Vis characterization showed that the surface plasmon resonance (SPR) peaks of AgNPs-leaf C. gigantea (AgNPs-LCg) and AgNPs-flower C. gigantea (AgNPs-FCg) appeared in the wavelength range of 410-460 nm. Scanning electron microscopy energy-dispersive X-ray spectrometry (SEM-EDS) revealed the agglomeration and spherical shapes of AgNPs-LCg and AgNPs-FCg with diameters ranging from 87.85 to 256.7 nm. Zeta potentials were observed in the range of -41.8 to -25.1 mV. The Kirby-Bauer disc diffusion assay revealed AgNPs-FCg as the most potent antimicrobial agent with inhibition zones of 12.05 ± 0.58, 11.29 ± 0.45, and 9.02 ± 0.10 mm for Escherichia coli, Staphylococcus aureus, and Candida albicans, respectively. In conclusion, aqueous extract from the leaves or flowers of Calotropis gigantea may be used in the green synthesis of AgNPs with broad-spectrum antimicrobial activities.


Тема - темы
Anti-Infective Agents , Calotropis , Metal Nanoparticles , Acetone/analogs & derivatives , Anti-Bacterial Agents/chemistry , Anti-Infective Agents/chemistry , Escherichia coli , Green Chemistry Technology , Hydrazones , Indonesia , Metal Nanoparticles/chemistry , Plant Extracts/chemistry , Plant Extracts/pharmacology , Silver/chemistry
9.
Front Cell Infect Microbiol ; 12: 933824, 2022.
Статья в английский | MEDLINE | ID: covidwho-2022656

Реферат

Coronavirus disease 2019 (COVID-19) pandemic has killed huge populations throughout the world and acts as a high-risk factor for elderly and young immune-suppressed patients. There is a critical need to build up secure, reliable, and efficient drugs against to the infection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus. Bioactive compounds of Ashwagandha [Withania somnifera (L.) Dunal] may implicate as herbal medicine for the management and treatment of patients infected by SARS-CoV-2 infection. The aim of the current work is to update the knowledge of SARS-CoV-2 infection and information about the implication of various compounds of medicinal plant Withania somnifera with minimum side effects on the patients' organs. The herbal medicine Withania somnifera has an excellent antiviral activity that could be implicated in the management and treatment of flu and flu-like diseases connected with SARS-CoV-2. The analysis was performed by systematically re-evaluating the published articles related to the infection of SARS-CoV-2 and the herbal medicine Withania somnifera. In the current review, we have provided the important information and data of various bioactive compounds of Withania somnifera such as Withanoside V, Withanone, Somniferine, and some other compounds, which can possibly help in the management and treatment of SARS-CoV-2 infection. Withania somnifera has proved its potential for maintaining immune homeostasis of the body, inflammation regulation, pro-inflammatory cytokines suppression, protection of multiple organs, anti-viral, anti-stress, and anti-hypertensive properties. Withanoside V has the potential to inhibit the main proteases (Mpro) of SARS-CoV-2. At present, synthetic adjuvant vaccines are used against COVID-19. Available information showed the antiviral activity in Withanoside V of Withania somnifera, which may explore as herbal medicine against to SARS-CoV-2 infection after standardization of parameters of drug development and formulation in near future.


Тема - темы
COVID-19 , Withania , Aged , Antiviral Agents/therapeutic use , COVID-19/drug therapy , Drug Discovery , Humans , Plant Extracts/pharmacology , Plant Extracts/therapeutic use , SARS-CoV-2
10.
Int J Mol Sci ; 23(18)2022 Sep 07.
Статья в английский | MEDLINE | ID: covidwho-2010122

Реферат

Inhibition of inflammatory responses from the spike glycoprotein of SARS-CoV-2 (Spike) by targeting NLRP3 inflammasome has recently been developed as an alternative form of supportive therapy besides the traditional anti-viral approaches. Clerodendrum petasites S. Moore (C. petasites) is a Thai traditional medicinal plant possessing antipyretic and anti-inflammatory activities. In this study, C. petasites ethanolic root extract (CpEE) underwent solvent-partitioned extraction to obtain the ethyl acetate fraction of C. petasites (CpEA). Subsequently, C. petasites extracts were determined for the flavonoid contents and anti-inflammatory properties against spike induction in the A549 lung cells. According to the HPLC results, CpEA significantly contained higher amounts of hesperidin and hesperetin flavonoids than CpEE (p < 0.05). A549 cells were then pre-treated with either C. petasites extracts or its active flavonoids and were primed with 100 ng/mL of spike S1 subunit (Spike S1) and determined for the anti-inflammatory properties. The results indicate that CpEA (compared with CpEE) and hesperetin (compared with hesperidin) exhibited greater anti-inflammatory properties upon Spike S1 induction through a significant reduction in IL-6, IL-1ß, and IL-18 cytokine releases in A549 cells culture supernatant (p < 0.05). Additionally, CpEA and hesperetin significantly inhibited the Spike S1-induced inflammatory gene expressions (NLRP3, IL-1ß, and IL-18, p < 0.05). Mechanistically, CpEA and hesperetin attenuated inflammasome machinery protein expressions (NLRP3, ASC, and Caspase-1), as well as inactivated the Akt/MAPK/AP-1 pathway. Overall, our findings could provide scientific-based evidence to support the use of C. petasites and hesperetin in the development of supportive therapies for the prevention of COVID-19-related chronic inflammation.


Тема - темы
Antipyretics , COVID-19 , Clerodendrum , Hesperidin , Petasites , A549 Cells , Anti-Inflammatory Agents/pharmacology , COVID-19/drug therapy , Caspase 1/metabolism , Clerodendrum/metabolism , Cytokines/metabolism , Flavonoids/pharmacology , Hesperidin/pharmacology , Humans , Inflammasomes/metabolism , Interleukin-18 , Interleukin-6 , Lung/metabolism , NLR Family, Pyrin Domain-Containing 3 Protein/metabolism , Plant Extracts/pharmacology , Proto-Oncogene Proteins c-akt , SARS-CoV-2 , Solvents , Spike Glycoprotein, Coronavirus , Transcription Factor AP-1
11.
Molecules ; 27(15)2022 Jul 27.
Статья в английский | MEDLINE | ID: covidwho-1994114

Реферат

Medicinal and food homologous adlay (Coix lachryma-jobi L. var. ma-yuen Stapf) plays an important role in natural products promoting human health. We demonstrated the systematic actional mechanism of functional ingredients in adlay to promote human health, based on the PubMed, CNKI, Google, and ISI Web of Science databases from 1988 to 2022. Adlay and its extracts are rich in 30 ingredients with more than 20 health effects based on human and animal or cell cultures: they are anti-cancer, anti-inflammation, anti-obesity, liver protective, anti-virus, gastroprotective, cardiovascular protective, anti-hypertension, heart disease preventive, melanogenesis inhibiting, anti-allergy, endocrine regulating, anti-diabetes, anti-cachexia, osteoporosis preventive, analgesic, neuroprotecting, suitable for the treatment of gout arthritis, life extending, anti-fungi, and detoxifying effects. Function components with anti-oxidants are rich in adlay. These results support the notion that adlay seeds may be one of the best functional foods and further reveal the action mechanism of six major functional ingredients (oils, polysaccharides, phenols, phytosterols, coixol, and resistant starch) for combating diseases. This review paper not only reveals the action mechanisms of adding adlay to the diet to overcome 17 human diseases, but also provides a scientific basis for the development of functional foods and drugs for the treatment of human diseases.


Тема - темы
Anti-Allergic Agents , Coix , Animals , Functional Food , Humans , Phenols , Plant Extracts/pharmacology , Plant Extracts/therapeutic use
13.
J Pharm Biomed Anal ; 220: 114989, 2022 Oct 25.
Статья в английский | MEDLINE | ID: covidwho-1977554

Реферат

Morinda citrifolia Linn (noni) is an important plant in the Pacific Asian region. The fruit has been used as a food source and has shown therapeutical benefits for health. Recently, it has become a source for bioactive compounds. In this study, we investigated the antimicrobial and anticancer activities of alcoholic extracts of Hainan dry noni fruit with machinery assistance and identified their novel compounds by UPLC-Q-Exactive Obitrap-MS/MS. By IE extractor aided method, the extraction of both NFE (Noni Fruit Ethanol) and NFM (Noni Fruit Methanol) solvent crude sample extracts were obtained with recovery yields of 98.48% and 71.65%, respectively. The antimicrobial effect of the crude extracts was subjected to disc diffusion test screening against two microbial strains bacterium SA (Staphylococcus aureus) and, fungal CA (Candida albicans). The MIC values of SA and CA were 35.34 and 47.80 mg/mL for NFE, 117.40 and 108.01 mg/mL for NFM, respectively. Further on, cell viability assay showed that IC50 values of extract NFE and NFM on human UMUC-3 bladder carcinogenic cells were 865.1 and 789.1 µg/mL with less effect to human SVHUC-1 normal cell line for 72hr incubation. Using UPLC-Q-exactive Orbitrap-MS/MS, ten compounds were identified in the noni extracts and confirmed from the HMDB and FooDB. Five known bioactive compounds had been used for treatments in anti-cancer, anti-obesity, and Covid-19 patients. The remaining five compounds were found novel in noni fruit. They were Cyanidin 3-(2 G-xylosylrutinoside), Inulobiose, Clausarinol, Pectachol, and 4,7-Megastigmadien-9-ol. The potential bioactivities of these novel compounds will be studied in the near future. These findings form a basis on screening natural medicinal plant extracts for beneficial use as a food and health source.


Тема - темы
Antineoplastic Agents , COVID-19 , Morinda , Anti-Bacterial Agents , Antineoplastic Agents/pharmacology , Ethanol , Fruit , Humans , Methanol , Plant Extracts/pharmacology , Solvents , Tandem Mass Spectrometry
14.
Molecules ; 27(15)2022 Jul 29.
Статья в английский | MEDLINE | ID: covidwho-1969392

Реферат

The aim of this study was to investigate the effect of blackberry and raspberry fruits (1 and 4%) and leaves (0.5 and 1%) on the biological activities of rape honey. Honey and plant material extracts were analyzed regarding total phenolic, flavonoid, anthocyanin contents, HPTLC and HPLC polyphenol profiles, as well as antioxidant activity. The antiviral potential was analyzed against bacteriophage phi 6-a coronavirus surrogate-whereas antimicrobial was tested against S. aureus and E. coli. Blackberry extracts were more abundant in antioxidants than raspberry extracts, with better properties found for leaves than fruits and for cultivated rather than commercial plants. The addition of both Rubus plant additives significantly increased the antioxidant potential of honey by four-fold (for 4% fruits additive) to five-fold (for 1% of leaves). Honey with the addition of fruits possessed higher antiviral potential compared with raw rape honey (the highest for 4% of raspberry fruit and 1% of blackberry leaf additive). Honey enriched with Rubus materials showed higher antibacterial potential against S. aureus than rape honey and effectively inhibited S. aureus biofilm formation. To summarize, honey enriched with Rubus fruit or leaves are characterized by increased pro-health value and can be recommended as a novel functional food.


Тема - темы
Honey , Rubus , Anti-Bacterial Agents/pharmacology , Antioxidants/pharmacology , Antiviral Agents/pharmacology , Escherichia coli , Fruit , Functional Food , Plant Extracts/pharmacology , Staphylococcus aureus
15.
Exp Biol Med (Maywood) ; 247(20): 1797-1809, 2022 Oct.
Статья в английский | MEDLINE | ID: covidwho-1957003

Реферат

This review presents information from several studies that have demonstrated the antiviral activity of extracts (Andrographis paniculata, Artemisia annua, Artemisia afra, Cannabis sativa, Curcuma longa, Echinacea purpurea, Olea europaea, Piper nigrum, and Punica granatum) and phytocompounds derived from medicinal plants (artemisinins, glycyrrhizin, and phenolic compounds) against SARS-CoV-2. A brief background of the plant products studied, the methodology used to evaluate the antiviral activity, the main findings from the research, and the possible mechanisms of action are presented. These plant products have been shown to impede the adsorption of SARS-CoV-2 to the host cell, and prevent multiplication of the virus post its entry into the host cell. In addition to antiviral activity, the plant products have also been demonstrated to exert an immunomodulatory effect by controlling the excessive release of cytokines, which is commonly associated with SARS-CoV-2 infections.


Тема - темы
Artemisinins , COVID-19 , Plants, Medicinal , SARS-CoV-2 , Antiviral Agents/pharmacology , Antiviral Agents/therapeutic use , COVID-19/drug therapy , Plant Extracts/pharmacology , Plant Extracts/therapeutic use
16.
Int J Biol Sci ; 18(12): 4677-4689, 2022.
Статья в английский | MEDLINE | ID: covidwho-1954700

Реферат

In the current climate, many countries are in dire need of effective preventive methods to curb the Severe Acute Respiratory Syndrome Coronavirus Type 2 (SARS-CoV-2) pandemic. The purpose of this research is to screen and explore natural plant extracts that have the potential to against SARS-CoV-2 and provide alternative options for SARS-CoV-2 prevention and hand sanitizer or spray-like disinfectants. We first used Spike-ACE2 ELISA and TMPRSS2 fluorescence resonance energy transfer (FRET) assays to screen extracts from agricultural by-products from Taiwan with the potential to impede SARS-CoV-2 infection. Next, the SARS-CoV-2 pseudo-particles (Vpp) infection assay was tested to validate the effectiveness. We identified an extract from coffee leaf (Coffea Arabica), a natural plant that effectively inhibited wild-type SARS-CoV-2, and five Variants of Concern (Alpha, Beta, Gamma, Delta, and Omicron strain) from entering host cells. In an attempt to apply coffee leaf extract for hand sanitizer or spray-like disinfectants, we designed a skin-like gelatin membrane experiment. We showed that the high concentration of coffee leaf extract on the skin surface could block SARS-CoV-2 into cells more potently than 75% Ethanol, a standard disinfectant to inactivate SARS-CoV-2. Finally, LC-HRMS analysis was used to identify compounds such as caffeine, chlorogenic acid (CGA), quinic acid, and mangiferin that are associated with an anti-SARS-CoV-2 activity. Our results demonstrated that coffee leaf extract, an agricultural by-product effectively inhibits SARS-CoV-2 Vpp infection through an ACE2-dependent mechanism and may be utilized to develop products against SARS-CoV-2 infection.


Тема - темы
COVID-19 , Coffea , Hand Sanitizers , Plant Extracts , Angiotensin-Converting Enzyme 2 , Coffea/chemistry , Plant Extracts/pharmacology , Plant Extracts/therapeutic use , SARS-CoV-2 , Spike Glycoprotein, Coronavirus
17.
Infect Disord Drug Targets ; 22(5): 22-30, 2022.
Статья в английский | MEDLINE | ID: covidwho-1951886

Реферат

BACKGROUND: Flavonoid class phytochemicals are natural compounds present in different medicinal plants, vegetables and fruits. Ginkgo biloba contains significant amounts of bioflavonoid 'bilobetin'. Bilobetin is an active phytochemical used for the treatment of human health complications due to its medicinal properties and therapeutic benefit. The purpose of this work is to collect and reviewed scientific data on bilobetin from different literature sources; highlight their biological properties, pharmacological activities and analytical aspects. METHODS: Health beneficial aspects of bilobetin have been investigated in the present work through scientific data analysis. PubMed, Google Scholar, Google, Scopus, etc. have been searched in the present work in order to collect scientific information on bilobetin. Medicinal importance and therapeutic benefit of bilobetin has been searched in the present work through these databases of bilobetin. Detailed pharmacological activities of bilobetin have been reviewed in the present work through literature data analysis of various scientific research works. However, analytical data of bilobetin were also collected and reviewed in the present reaserch. RESULTS: Literature data analysis of bilobetin in the present work revealed the medicinal properties and therapeutic potential of bilobetin mainly due to its anti-fungal, anti-inflammatory, anti-oxidant, antihyperlipidemic, and anti-proliferative activities. Literature data analysis revealed the effectiveness of bilobetin on osteoporosis, glucose metabolism, adipocytes, SARS CoV-2, Influenza A virus and human thrombin. Scientific data also revealed the importance of different analytical techniques for the isolation, separation, identification, and quantification of bilobetin. CONCLUSION: Scientific data analysis revealed biological importance and pharmacological activities of bilobetin in the health sector.


Тема - темы
Biflavonoids , COVID-19 , Plants, Medicinal , Anti-Inflammatory Agents , Antioxidants/pharmacology , Antioxidants/therapeutic use , Biflavonoids/pharmacology , Flavonoids/pharmacology , Flavonoids/therapeutic use , Humans , Phytochemicals/pharmacology , Phytotherapy , Plant Extracts/pharmacology , Plants, Medicinal/chemistry
18.
Biomed Pharmacother ; 153: 113414, 2022 Sep.
Статья в английский | MEDLINE | ID: covidwho-1936094

Реферат

Targeting macrophage M1 polarization is a promising strategy with fewer detrimental effects in COVID-19 curation. Phenylethanoid glycosides (PhGs) of Cistanche tubulosa are a botanical drug to possess various anti-inflammation-related functions, such as immunomodulating, hepatoprotective or neuroprotective functions, whereas their anti-inflammatory activity is rarely understood. A search into their anti-inflammatory characteristics led to the isolation of 49 PhGs along with 15 new PhGs. Their inhibitory effects against M1 polarization induced by LPS plus IFN-γ were explored in RAW264.7 macrophages. Of these PhGs, tubuloside B (Tub B) exerted substantial NO scavenging effect both in chemical- and cell-based assays, and it inhibited massive production of cytokines and chemokines. Tub B decreased ERK1/2 phosphorylation via direct binding and inhibited the MAPK signaling pathway. Tub B also directly binded to Mob1 protein, thereby increased the stability and level of Mob1 protein by inhibiting ubiquitinated degradation. Mob1 was pivotal for the anti-inflammatory activity of Tub B, and it acted independently of the canonical Hippo-YAP pathway. Moreover, ERK1/2 and Mob1 also had a synergic effect on modulating the inflammatory response. Finally, these effects of Tub B were verified in mice with LPS-induced systemic inflammatory response syndrome. Taken together, these results indicated that Tub B acted as a promising agent against M1 macrophage activation by synergistically targeting ERK1/2 and Mob1, and that it may potentially be a drug candidate to prevent/treat inflammatory diseases, especially in COVID-19.


Тема - темы
COVID-19 , Cistanche , Animals , Anti-Inflammatory Agents/metabolism , Anti-Inflammatory Agents/pharmacology , COVID-19/drug therapy , Glucosides , Glycosides/pharmacology , Intracellular Signaling Peptides and Proteins/metabolism , Lipopolysaccharides/metabolism , Lipopolysaccharides/pharmacology , MAP Kinase Signaling System , Macrophage Activation , Macrophages/metabolism , Mice , Plant Extracts/pharmacology
19.
Biomed Pharmacother ; 153: 113256, 2022 Sep.
Статья в английский | MEDLINE | ID: covidwho-1936093

Реферат

Punica granatum L (pomegranate) is one of the Mediterranean medicinal plants that has been used for generations in treating ulcers, diarrhea, and male infertility. Increasing evidence has revealed that pomegranate possesses myriads of pharmacological activities such as anti-diabetic, anti-tumor, anti-inflammatory, anti-malaria, anti-fibrotic, anti-fungal, anti-bacterial, and other effects. Consumption of pomegranate could be used to improve gut microbiota, and therefore prevent obesity and diabetes. The mechanisms of actions of pomegranate, mainly involve nuclear factor-erythroid factor 2-related factor 2 (Nrf2), nuclear factor kappa B (NF-kB), and mitogen-activated protein kinase (MAPK) signaling pathways. In recent times, in silico molecular docking studies demonstrated that pomegranate extract and or its phytochemicals are potential inhibitors of severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) spike protein and angiotensin-converting enzyme 2 (ACE2) receptor contact. Also, some clinical trials have indicated that pomegranate can be consumed for alleviation of non-alcoholic fatty liver disease, metabolic syndrome, dental infections, and menopausal symptoms. To date, active compounds, viz. alkaloids, anthocyanidins, tannins, flavonoids, phenolics, proanthocyanidins, sterols, terpenes, terpenoids, xanthonoids, fatty acids, organic acids, lignans, saccharides, and vitamin C have been isolated from pomegranate. Therefore, the current review article aimed to gather and presents an update on the ethnomedicinal uses, pharmacological activities, phytochemistry, and molecular mechanisms of Punica granatum L. This knowledge is of paramount importance in the future in drug discovery for the development of novel natural drugs for the treatment of various ailments.


Тема - темы
COVID-19 , Lythraceae , Pomegranate , Anti-Inflammatory Agents/pharmacology , COVID-19/drug therapy , Humans , Lythraceae/chemistry , Molecular Docking Simulation , Plant Extracts/chemistry , Plant Extracts/pharmacology , Plant Extracts/therapeutic use , SARS-CoV-2
20.
Molecules ; 27(14)2022 Jul 13.
Статья в английский | MEDLINE | ID: covidwho-1938911

Реферат

The COVID-19 pandemic has intensively disrupted global health, economics, and well-being. Andrographis paniculata (Burm. f.) Nees has been used as a complementary treatment for COVID-19 in several Asian countries. This review aimed to summarize the information available regarding A. paniculata and its constituents, to provide critical points relating to its pharmacological properties, safety, and efficacy, revealing its potential to serve as a source of lead compounds for COVID-19 drug discovery. A. paniculata and its active compounds possess favorable antiviral, anti-inflammatory, immunomodulatory, and antipyretic activities that could be beneficial for COVID-19 treatment. Interestingly, recent in silico and in vitro studies have revealed that the active ingredients in A. paniculata showed promising activities against 3CLpro and its virus-specific target protein, human hACE2 protein; they also inhibit infectious virion production. Moreover, existing publications regarding randomized controlled trials demonstrated that the use of A. paniculata alone or in combination was superior to the placebo in reducing the severity of upper respiratory tract infection (URTI) manifestations, especially as part of early treatment, without serious side effects. Taken together, its chemical and biological properties, especially its antiviral activities against SARS-CoV-2, clinical trials on URTI, and the safety of A. paniculata, as discussed in this review, support the argument that A. paniculata is a promising natural source for drug discovery regarding COVID-19 post-infectious treatment, rather than prophylaxis.


Тема - темы
Andrographis , COVID-19 , Andrographis/chemistry , Andrographis paniculata , Antiviral Agents/pharmacology , Antiviral Agents/therapeutic use , COVID-19/drug therapy , Drug Discovery , Humans , Lead , Pandemics , Plant Extracts/pharmacology , Plant Extracts/therapeutic use , SARS-CoV-2
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