Bovine viral diarrhoea(BVD) virus antiviral activity of Korean Tung Tree (Aleurites fordii) extracts in vivo

2015 ◽  
Author(s):  
Youn-Jin Park ◽  
Yeong-ho Choe ◽  
Byeung-Soo Kim
Keyword(s):  
Antiviral Activity ◽  
Ethyl Acetate ◽  
Antiviral Effect ◽  
Cytotoxicity Test ◽  
Tung Tree ◽  
Bovine Viral Diarrhoea ◽  
Infectious Dose ◽  
Tissue Culture Infectious Dose ◽  
Ethyl Acetate Extracts

This study investigated the Bovine viral diarrhoea(BVD) virus antiviral effect of Aleurites fordii (tung tree) extract. . First, a cytotoxicity test on MDBK (Madin-Darby bovine kidney) cells took place at various n-Hexane and ethyl acetate extract concentrations. Each of the extracts’ cytotoxicity test results had 0.03mg/ml of n-Hexane and 0.06 mg/ml of ethyl acetate. In the tissue culture infectious dose (TCID50) assay, 0.03 mg/ml of the ethyl acetate extracts decreased the BVD virus by 1.4 log, whereas the other extracts did not show any antiviral activity. The results suggest that ethyl acetate extracts and fractions of Aleurites fordii can replace chemical antivirus substances.

scholarly journals The in vitro and in vivo potency of CT-P59 against Delta and its associated variants of SARS-CoV-2

2021 ◽  
Author(s):  
Dong-Kyun Ryu ◽  
Hye-Min Woo ◽  
Bobin Kang ◽  
Hanmi Noh ◽  
Jong-In Kim ◽  
...  
Keyword(s):  
Antiviral Activity ◽  
Respiratory Tract ◽  
Animal Studies ◽  
Antiviral Effect ◽  
The World ◽  
Symptom Remission ◽  
Challenge Experiment ◽  
Reduced Activity

The Delta variant originally from India is rapidly spreading across the world and causes to resurge infections of SARS-CoV-2. We previously reported that CT-P59 presented its in vivo potency against Beta and Gamma variants, despite its reduced activity in cell experiments. Yet, it remains uncertain to exert the antiviral effect of CT-P59 on the Delta and its associated variants (L452R). To tackle this question, we carried out cell tests and animal study. CT-P59 showed reduced antiviral activity but enabled neutralization against Delta, Epsilon, and Kappa variants in cells. In line with in vitro results, the mouse challenge experiment with the Delta variant substantiated in vivo potency of CT-P59 showing symptom remission and virus abrogation in the respiratory tract. Collectively, cell and animal studies showed that CT-P59 is effective against the Delta variant infection, hinting that CT-P59 has therapeutic potency for patients infected with Delta and its associated variants.

scholarly journals Fatty acid analysis, cytotoxicity, antimicrobial and antioxidant activities of different extracts of the flowers of Nyctanthes arbor-tristis L.

2020 ◽  
Vol 55 (3) ◽  
pp. 207-214
Author(s):  
MM Haque ◽  
N Sultana ◽  
SMT Abedin ◽  
N Hossain ◽  
SE Kabir
Keyword(s):  
Antibacterial Activity ◽  
Fatty Acid ◽  
Ethyl Acetate ◽  
Antioxidant Activities ◽  
Fatty Acid Analysis ◽  
Cytotoxicity Test ◽  
Methanol Extracts ◽  
Vincristine Sulphate ◽  
Ic50 Values ◽  
Ethyl Acetate Extracts

The fatty acid analysis and biological activity of n-hexane, dichloromethane, ethyl acetate and methanol extracts of Nyctanthes arbor-tristis L. flowers are reported. Five fatty acids namely palmitic (44.15%), stearic (19.34%), arachidic (15.06%), behenic (9.77%) and lignoceric (11.69%) acids were identified. From cytotoxicity test, the LC50 values (the median lethal concentration) for n-hexane, dichloromethane, ethyl acetate and methanol extracts as well as for standard vincristine sulphate were found 7.05, 4.67, 3.14, 5.53 and 0.50 μg/ml, respectively. Antibacterial activity results of different extracts were compared with standard antibiotic ciprofloxacin and tetracycline by measuring the zone of inhibition diameter in millimeter. The dichloromethane and ethyl acetate extracts showed significant antibacterial activity. From antioxidant activity test, IC50 values (50% inhibitory concentration) of n-hexane, dichloromethane, ethyl acetate, methanol extracts and ascorbic acid were found to be 291.92 mg/ml, 45.74 μg/ml, 21.86 μg/ml, 64.30 μg/ml and 3.98 μg/ml, respectively. Bangladesh J. Sci. Ind. Res.55(3), 207-214, 2020

Antidiabetic efficacies of methanolic and ethyl acetate extracts of Aristolochia ringens (Vahl) roots: in vivo comparative studies

2019 ◽  
Vol 28 (5) ◽  
pp. 1267-1274
Author(s):  
Abdulhakeem Olarewaju Sulyman ◽  
Jubril Olayinka Akolade ◽  
Saheed Sabiu ◽  
Rasheed Bolaji Ibrahim ◽  
Raliat Abimbola Aladodo ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Comparative Studies ◽  
Ethyl Acetate Extracts

In Vivo Evaluation of the Toxic Effect of Ethyl Acetate Extracts of Marine Antibiotic Resistance Pseudomonas Species Derived from the Red Sea

2017 ◽  
Vol 184 (1) ◽  
pp. 323-349 ◽  
Author(s):  
Mervat Morsy Abbas Ahmed El-Gendy ◽  
Hind A. A. Al-Zahrani ◽  
Najlaa Y. Abozinadah ◽  
Ahmed Mohamed Ahmed El-Bondkly
Keyword(s):  
Antibiotic Resistance ◽  
Ethyl Acetate ◽  
Toxic Effect ◽  
Red Sea ◽  
In Vivo Evaluation ◽  
Pseudomonas Species ◽  
Ethyl Acetate Extracts

scholarly journals Comparison of the Qualitative Chemical Composition of Extracts from Ageratina havanensis Collected in Two Different Phenological Stages by FIA-ESI-IT-MSn and UPLC/ESI-MSn: Antiviral Activity

2017 ◽  
Vol 12 (1) ◽  
pp. 1934578X1701200 ◽  
Author(s):  
Trina H. García ◽  
Claudia Quintino da Rocha ◽  
Marcelo J. Dias ◽  
Liudis L. Pino ◽  
Gloria del Barrio ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Chemical Composition ◽  
Antiviral Activity ◽  
Ethyl Acetate ◽  
High Performance ◽  
Ethyl Acetate Extract ◽  
Reproductive Season ◽  
Ionization Mass ◽  
Herpes Simplex Viruses ◽  
Ethyl Acetate Extracts

The flowers and leaves of Ageratina havanensis (Kunth) R. M. King & H. Robinson are traditionally used as a tea to cure several diseases. The production of active secondary metabolites can be affected by several environmental factors such as climate, altitude, rainfall, phenological stage and other conditions that may influence the growth of plants. In this sense, the development of a methodology to compare the chemical composition of plant extracts is needed. The qualitative chemical composition of the ethyl acetate extracts of flowers and leaves, collected in both reproductive and non-reproductive season, was determined by flow injection analysis-electrospray ionization-ion trap tandem mass spectrometry (FIA-ESI-IT-MSn) and ultra-high-performance liquid chromatography coupled to electrospray negative ionization mass spectrometry (UPLC/ESI-MSn). The qualitative chemical composition of the ethyl acetate extracts of flowers and leaves was very similar in all cases. Also the antiviral activity of flowers against human herpes simplex viruses type 1 and 2 (HSV-1, HSV-2) ( Herpesviridae) was analyzed. Three glucoside flavonoids were isolated from the ethyl acetate extract of the leaves of A. havanensis collected in flowering season using chromatographic methods and their structures were elucidated by physical and spectroscopic data measurements, and by comparing the obtained data with previously published values. The compounds were identified as 3- O-β-D-glucosyl-7-methoxyaromadendrin (5), 7- O-β-D-glucosyl-4′-dihydroxy-5-methoxyflavanone (6) and 5- O-β-D-glucosylsakuranetin (7); this is the first report of the isolation of these compounds in the Asteraceae family. Since the qualitative composition of the extracts of A. havanensis was similar in all cases, it can be expected that the ethyl acetate extract of the leaves collected in the non-reproductive season has anti-herpetic activity similar to that obtained in the reproductive season.

scholarly journals MOXIDECTIN AND IVERMECTIN INHIBIT SARS-COV-2 REPLICATION IN VERO E6 CELLS BUT NOT IN HUMAN PRIMARY AIRWAY EPITHELIUM CELLS

2021 ◽  
Author(s):  
Nilima Dinesh Kumar ◽  
Bram M. ter Ellen ◽  
Ellen M. Bouma ◽  
Berit Troost ◽  
Denise P. I. van de Pol ◽  
...  
Keyword(s):  
Antiviral Activity ◽  
Antiviral Effect ◽  
Vero Cells ◽  
In Vitro Models ◽  
World Health ◽  
Current Evidence ◽  
High Dose ◽  
Health Organization

Antiviral therapies are urgently needed to treat and limit the development of severe COVID-19 disease. Ivermectin, a broad-spectrum anti-parasitic agent, has been shown to have anti-SARS-CoV-2 activity in Vero cells at a concentration of 5 μM. These limited in vitro results triggered the investigation of ivermectin as a treatment option to alleviate COVID-19 disease. In April 2021, the World Health Organization stated, however, the following: “the current evidence on the use of ivermectin to treat COVID-19 patients is inconclusive”. It is speculated that the in vivo concentration of ivermectin is too low to exert a strong antiviral effect. Here, we performed a head-to head comparison of the antiviral activity of ivermectin and the structurally related, but metabolically more stable, moxidectin in multiple in vitro models of SARS-CoV-2 infection, including physiologically relevant human respiratory epithelial cells. Both moxidectin and ivermectin exhibited antiviral activity in Vero E6 cells. Subsequent experiments revealed that the compounds predominantly act on a step after virus cell entry. Surprisingly, however, in human airway-derived cell models, moxidectin and ivermectin failed to inhibit SARS-CoV-2 infection, even at a concentration of 10 μM. These disappointing results call for a word of caution in the interpretation of anti-SARS-CoV-2 activity of drugs solely based on Vero cells. Altogether, these findings suggest that, even by using a high-dose regimen of ivermectin or switching to another drug in the same class are unlikely to be useful for treatment against SARS-CoV-2 in humans.

scholarly journals Antitumor Activities of Ethyl Acetate Extracts fromSelaginella doederleiniiHieronIn VitroandIn Vivoand Its Possible Mechanism

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Jia-zhi Wang ◽  
Juan Li ◽  
Ping Zhao ◽  
Wen-tao Ma ◽  
Xie-he Feng ◽  
...  
Keyword(s):  
Antitumor Activity ◽  
Ethyl Acetate ◽  
Cell Apoptosis ◽  
Mrna Level ◽  
Pcr Analysis ◽  
Antitumor Activities ◽  
Cox 2 ◽  
Ethyl Acetate Extracts

The antitumor activities of ethyl acetate extracts fromSelaginella doederleiniiHieron (SD extracts)in vitroandin vivoand its possible mechanism were investigated. HPLC method was developed for chemical analysis. SD extracts were submitted to 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay on different cells, flow cytometry, and RT-PCR analysis using HepG2 cell and antitumor activityin vivousing H-22 xenograft tumor mice. Six biflavonoids from SD extracts were submitted to molecular docking assay. The results showed that SD extracts had considerable antitumor activityin vitroandin vivowithout obvious toxicity on normal cells and could induce cell apoptosis. The mechanisms of tumorigenesis and cell apoptosis induced by SD extracts may be associated with decreasing the ratio of bcl-2 and bax mRNA level, activating caspase-3, suppressing survivin, and decreasing the gene expression of COX-2, 5-LOX, FLAP, and 12-LOX mRNA. The main active component in SD extracts is biflavonoids and some exhibited strong interactions with COX-2, 5-LOX, 12-LOX, and 15-LOX. These results offering evidence of possible mechanisms of SD extracts suppress cell proliferation and promote apoptosis and provide the molecular theoretical basis of clinical application ofS. doederleiniifor cancer therapy.

scholarly journals Antimalarial Activity of Nigella sativa L. Seed Extracts and Selection of Resistance in Plasmodium berghei ANKA in a Mouse Model

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Rahma Udu ◽  
Job Oyweri ◽  
Jeremiah Gathirwa
Keyword(s):  
Mouse Model ◽  
Ethyl Acetate ◽  
Cell Volume ◽  
Plasmodium Berghei ◽  
Packed Cell Volume ◽  
Antimalarial Activity ◽  
Nigella Sativa ◽  
Plasmodium Berghei Anka ◽  
Ethyl Acetate Extracts

Background. Chemotherapy plays a crucial role in malaria control. However, the main obstacle to treatment has been the rise of parasite resistance to most antimalarial drugs. Artemisinin-based combination therapies (ACTs) remain the most effective antimalarial medicines available today. However, malaria parasite tolerance to ACTs is now increasingly prevalent especially in Southeast Asia presenting the danger of the spread of ACTs resistance to other parts of the world. Consequently, this creates the need for alternative effective antimalarials. Therefore, this study sought out to determine antimalarial potential, safety, and resistance development of the extracts in a mouse model. Method. Methanolic and ethyl acetate extracts were obtained by solvent extraction. The extracts were assayed for acute toxicity in vivo. Additionally, the two extracts were evaluated for antimalarial activity in vivo against Plasmodium berghei ANKA strain by the 4-day suppressive test at 500, 250, and 125 mg/kg/day. Packed cell volume was evaluated to determine anemia manifestation. Finally, continuous drug pressure experiment at 500 mg/kg and DNA amplification via PCR were conducted. The amplicons underwent through Sanger sequencing. Results. There was no toxicity realized in the animals at 2000 mg/kg. Importantly, high parasitemia suppression of 75.52% and 75.30% using a dose of 500 mg/kg of methanolic and ethyl acetate extracts, respectively, was noted. The extracts were able to reverse packed cell volume reduction. Nigella sativa-resistant phenotype was selected as delayed parasite clearance. However, there was no change in the nucleotide sequences of PbMDR1 and PbCRT genes. Conclusion. The results provide room for future exploitation of the plant as an antimalarial.

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