scholarly journals Phytochemical screening, antioxidant activity and toxicity of the orchids Prosthechea cochleata and Prosthechea livida-A preliminary study

2020 ◽  
pp. 117-122
Author(s):  
Josué Nicanor Díaz Avilés ◽  
José Luis Alanís Méndez ◽  
Nahim Salgado Medrano ◽  
Alexandre Tochirico Cardoso Taketa ◽  
Ivette Alicia Chamorro Florescano ◽  
...  
Keyword(s):  
Cell Viability ◽  
Root Extract ◽  
Phytochemical Screening ◽  
Meoh Extract ◽  
Yeast Saccharomyces Cerevisiae ◽  
Phytochemical Composition ◽  
Significant Toxicity ◽  
A Cell ◽  
Anthracene Derivatives ◽  
Preliminary Study

Phytochemical composition, antioxidant, and toxic effects of two orchid (Prosthechea cochleata and Prosthechea livida) were examined in their different hexane and dichloromethane/methanol extracts of leaves, pseudobulbs, rhizome and roots.  Phytochemical screening reveals the presence of alkaloids, coumarins, flavonoids, saponins, steroids and terpenes except for anthracene derivatives in P. livida and tannins in both species. Results showed exhibited significant toxicity against brine shrimp with an LC50 values ranged from 3 to 54 µg/ml in 24 h.  Finally, the results of the antioxidant test in yeast (Saccharomyces cerevisiae) showed that CH2Cl2:MeOH extract of P. cochleata root extract presented the most efficient protective antioxidant percentage (%PA), with 20 µg/mL, displaying a cell viability of 68.58%. In P. livida case, rhizome extract presented the most efficient %PA, with 1000 µg/mL, with a cell viability of 65.82%.  The results evidenced the toxicity of  Prosthechea cochleata and Prosthechea livida and reveals potential antioxidative of extracts.

scholarly journals Phytochemical and antimicrobial properties of the methanolic extracts of Bombax buonopozense leaf and root

2012 ◽  
Vol 2 (3) ◽  
pp. 190-194 ◽  
Author(s):  
Godwin C Akuodor ◽  
Augustine D Essien ◽  
Jemilat A Ibrahim ◽  
Augustine Bassey ◽  
Joseph L Akpan ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Antimicrobial Properties ◽  
Diffusion Method ◽  
Root Extract ◽  
Phytochemical Screening ◽  
Medical Sciences ◽  
Active Components ◽  
Phytochemical Composition ◽  
Methanolic Extracts ◽  
Standard Procedures

Objective: The leaf and root of Bombax buonopozense which have some ethnomedicinal applications were subjected to phytochemical screening and antimicrobial activity against some disease causing microorganisms. Material & Methods: The phytochemical composition was evaluated using standard procedures. Susceptibility of these clinical isolates (Staphylococcus aureus, Bacillus subtilis, Klebsiella pneumonae, Proteus spp. and Escherichia coli) to the extracts was determined using the agar diffusion method. Results: Phytochemical screening revealed the presence of alkaloids, flavonoids, tannins, saponins, terpenoids, steroids, phlobatannins, anthraquinones and carbohydrates (mostly in root). The root extract demonstrated antibacterial activity against all the organisms tested, while the leaf extract had activity on S. aureus and B. subtilis only. Conclusion: The findings indicate that the root extract contain the most active components which may be used to source antibiotic substances for possible treatment of bacterial infections. DOI: http://dx.doi.org/10.3126/ajms.v2i3.4222 Asian Journal of Medical Sciences 2 (2011) 190-194 

scholarly journals CdSe QD Biosynthesis in Yeast Using Tryptone-Enriched Media and Their Conjugation with a Peptide Hecate for Bacterial Detection and Killing

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1463 ◽  
Author(s):  
Vishma Pratap Sur ◽  
Marketa Kominkova ◽  
Zaneta Buchtova ◽  
Kristyna Dolezelikova ◽  
Ondrej Zitka ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Synthesis Process ◽  
Synthesis Methods ◽  
Bacterial Cells ◽  
Cdse Qds ◽  
Yeast Saccharomyces Cerevisiae ◽  
Shape Distribution ◽  
Transmission Electron ◽  
A Cell ◽  
Physical And Chemical

The physical and chemical synthesis methods of quantum dots (QDs) are generally unfavorable for biological applications. To overcome this limitation, the development of a novel “green” route to produce highly-fluorescent CdSe QDs constitutes a promising substitute approach. In the present work, CdSe QDs were biosynthesized in yeast Saccharomyces cerevisiae using a novel method, where we showed for the first time that the concentration of tryptone highly affects the synthesis process. The optimum concentration of tryptone was found to be 25 g/L for the highest yield. Different methods were used to optimize the QD extraction from yeast, and the best method was found to be by denaturation at 80 °C along with an ultrasound needle. Multiple physical characterizations including transmission electron microscopy (TEM), dynamic light scattering (DLS), energy-dispersive X-ray spectroscopy (EDX), and spectrophotometry confirmed the optical features size and shape distribution of the QDs. We showed that the novel conjugate of the CdSe QDs and a cell-penetrating peptide (hecate) can detect bacterial cells very efficiently under a fluorescent microscope. The conjugate also showed strong antibacterial activity against vancomycin-resistant Staphylococcus aureus (VRSA), methicillin-resistant Staphylococcus aureus (MRSA), and Escherichia coli, which may help us to cope with the problem of rising antibiotic resistance.

scholarly journals Zinc, Zinc Transporters, and Cadmium Cytotoxicity in a Cell Culture Model of Human Urothelium

Toxics ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 94
Author(s):  
Soisungwan Satarug ◽  
Scott H. Garrett ◽  
Seema Somji ◽  
Mary Ann Sens ◽  
Donald A. Sens
Keyword(s):  
Dna Methylation ◽  
Cell Culture ◽  
Cell Viability ◽  
Zinc Transporters ◽  
Cell Culture Model ◽  
Induced Expression ◽  
Glutathione Biosynthesis ◽  
Culture Model ◽  
A Cell ◽  
Cd Exposure

We explored the potential role of zinc (Zn) and zinc transporters in protection against cytotoxicity of cadmium (Cd) in a cell culture model of human urothelium, named UROtsa. We used real-time qRT-PCR to quantify transcript levels of 19 Zn transporters of the Zrt-/Irt-like protein (ZIP) and ZnT gene families that were expressed in UROtsa cells and were altered by Cd exposure. Cd as low as 0.1 µM induced expression of ZnT1, known to mediate efflux of Zn and Cd. Loss of cell viability by 57% was seen 24 h after exposure to 2.5 µM Cd. Exposure to 2.5 µM Cd together with 10–50 µM Zn prevented loss of cell viability by 66%. Pretreatment of the UROtsa cells with an inhibitor of glutathione biosynthesis (buthionine sulfoximine) diminished ZnT1 induction by Cd with a resultant increase in sensitivity to Cd cytotoxicity. Conversely, pretreatment of UROtsa cells with an inhibitor of DNA methylation, 5-aza-2’-deoxycytidine (aza-dC) did not change the extent of ZnT1 induction by Cd. The induced expression of ZnT1 that remained impervious in cells treated with aza-dC coincided with resistance to Cd cytotoxicity. Therefore, expression of ZnT1 efflux transporter and Cd toxicity in UROtsa cells could be modulated, in part, by DNA methylation and glutathione biosynthesis. Induced expression of ZnT1 may be a viable mechanistic approach to mitigating cytotoxicity of Cd.

Cellular Differentiation in Response to Nutrient Availability: The Repressor of Meiosis, Rme1p, Positively Regulates Invasive Growth in Saccharomyces cerevisiae

Genetics ◽  
2003 ◽  
Vol 165 (3) ◽  
pp. 1045-1058
Author(s):  
Dewald van Dyk ◽  
Guy Hansson ◽  
Isak S Pretorius ◽  
Florian F Bauer
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Cellular Differentiation ◽  
Promoter Sequence ◽  
Quiescent State ◽  
Invasive Growth ◽  
Limited Growth ◽  
Yeast Saccharomyces Cerevisiae ◽  
A Cell ◽  
Signaling Modules ◽  
Differentiation Pathways

Abstract In the yeast Saccharomyces cerevisiae, the transition from a nutrient-rich to a nutrient-limited growth medium typically leads to the implementation of a cellular adaptation program that results in invasive growth and/or the formation of pseudohyphae. Complete depletion of essential nutrients, on the other hand, leads either to entry into a nonbudding, metabolically quiescent state referred to as G0 in haploid strains or to meiosis and sporulation in diploids. Entry into meiosis is repressed by the transcriptional regulator Rme1p, a zinc-finger-containing DNA-binding protein. In this article, we show that Rme1p positively regulates invasive growth and starch metabolism in both haploid and diploid strains by directly modifying the transcription of the FLO11 (also known as MUC1) and STA2 genes, which encode a cell wall-associated protein essential for invasive growth and a starch-degrading glucoamylase, respectively. Genetic evidence suggests that Rme1p functions independently of identified signaling modules that regulate invasive growth and of other transcription factors that regulate FLO11 and that the activation of FLO11 is dependent on the presence of a promoter sequence that shows significant homology to identified Rme1p response elements (RREs). The data suggest that Rme1p functions as a central switch between different cellular differentiation pathways.

In Vivo Anti-Anemic Effect of an Aqueous Root Extract of Phyllanthus Muellerianus (Kuntze) Exell in Model Rats.

2021 ◽  
Author(s):  
James Nyirenda ◽  
Gershom B. Lwanga ◽  
Kaampwe M. Muzandu ◽  
David K. Chuba ◽  
Gibson M. Sijumbila
Keyword(s):  
Plant Extract ◽  
Hematological Parameters ◽  
Negative Control ◽  
Control Group ◽  
Albino Rats ◽  
Root Extract ◽  
Dependent Manner ◽  
Phytochemical Screening ◽  
Aqueous Root Extract

Abstract Ethnopharmacological relevanceAnemia is a very serious condition in Zambia. One of the plants that has been used traditionally is Phyllanthus muellerianus where different parts of shrub are used to treat a number of diseases in Zambian folklore medicine. Earlier studies have investigated medicinal properties of its aqueous root extracts. This study evaluated the effect of P. muellerianus roots on the hematological indices of albino rats and determined its phytochemical profile. Aim of the studyTo carry out phytochemical screening of the root extract and assess the ant-anemic effect of the aqueous extract on laboratory rats with tail-bled induced anemia Materials and MethodsThirty-six male albino rats placed in six groups were used for the study. The groups comprised the 100, 200, and 400 mg/kg plant extract, Ranferon (200 mg/kg) positive control, anemic non treated control and a normal (non-anemic) control. Anemia, induced through bleeding of the rats, was defined as hemoglobin (Hb) levels less than 12 g/dL. The anti-anemic potential of the plant was determined by comparing its effect on the hematological parameters of rats on treatment to that of the control group.ResultsAfter treatment, rats on the 400 mg/kg plant extract dose showed the greatest increase in the mean values for Hb, Packed cell volume (PCV) and RBC count were 43.3±1.2%, 15.4±0.3 g/dL and 6.3±0.3 x106 /mL respectively, when compared to the negative control group (P < 0.05). Phytochemical screening revealed positive results for alkaloids, flavonoids, saponins, glycosides, steroids, triterpenoids and tannins with varying amounts.Conclusions. The aqueous root extract of P. muellerianus was efficacious against anemia in a dose-dependent manner. The phytochemical compositions seem to be responsible for its hematopoietic properties. Thus, the root decoction of P. muellerianus is useful in alleviating anemia and the results lend credence to its use in traditional medicine in the management of anemia.

scholarly journals SCREENING OF PHYTOCHEMICALS AND QUANTITATIVE ESTIMATION OF TOTAL FLAVONOIDS AND PHENOLIC COMPOUNDS OF LAGASCEA MOLLIS CAV. (ASTERACEAE)

2014 ◽  
Vol 1 (2) ◽  
pp. 94-97
Author(s):  
Saradha M ◽  
Paulsamy S ◽  
Abinaya G
Keyword(s):  
Phenolic Compounds ◽  
Methanol Extract ◽  
Quantitative Estimation ◽  
Root Extract ◽  
Total Flavonoids ◽  
Phytochemical Screening ◽  
Plant Parts ◽  
Soxhlet Apparatus ◽  
Phytochemical Constituents ◽  
Leaves And Roots

Aim of the study was to analyze the phytochemical constituents and estimation of total flavonoids and phenolic compounds of leaves and roots of the medicinal plant Lagascea mollis. Methanol extract of dried leaves and roots of L. mollis was prepared by using soxhlet apparatus. The extract prepared was tested forpreliminary qualitative phytochemical screening, followed by the quantitative estimation of total flavonoids and phenols by spectroscopy. The selected plant parts were found to contain alkaloids, flavonoids and terpenoids in both parts and saponin is present only in leaf. In quantitative estimation the reports revealedthe presence 0.017 and 0.013 mgRE/g extract and 458.91 and 704.50 mgGAE/g extract total flavonoids and phenolic compounds in leaf and root extract respectively. These major phytoconstituents present in this species may be accounted as factors for the medicinal importance of L. mollis.

scholarly journals Phytochemical Screening, Antioxidant and Antibacterial Activities of the Root Extract of Cyphostemma adenocaule (Steud. ex A. Rich.) Wild & R.B.Drumm

2021 ◽  
Vol 10 (2) ◽  
pp. 105-110
Author(s):  
Abdulbasit Haliru Yakubu ◽  
Mohammed Mustapha Mohammed ◽  
Abdulqadir Bukar Bababe ◽  
Hassan Yesufu Braimah
Keyword(s):  
Scientific Evidence ◽  
Antibacterial Properties ◽  
Plant Secondary Metabolites ◽  
Biological Properties ◽  
Chloroform Extract ◽  
Chemical Diversity ◽  
Root Extract ◽  
Moderate Activity ◽  
Phytochemical Screening ◽  
Test Organisms

Plant secondary metabolites have provided important bioactive principles for developing new lead compounds. Within their confinement, they exhibit unique chemical diversity, which influences their diverse biological properties. The Vitaceae family is known for its potent antioxidant and antibacterial phytoconstituents, among other biological properties. Cyphostemma adenocaule is one of the family members explored for its ethnomedicinal properties. This study undertook the evaluation of the phytochemical, antioxidant, and antibacterial properties of the root extract of Cyphostemma adenocaule. Preliminary phytochemical screening revealed the presence of flavonoids, alkaloids, carbohydrates & glycoside, saponins, and tannins. The methanol root extract had the highest activity in the DPPH assay, providing IC50 (50% inhibition) of 10.87µg/ml, followed by n-Hexane (IC50 74.10µg/ml) and chloroform (IC50 74.31µg/ml) extract. In the antibacterial assay, the chloroform extract was active against E. coli (24.00±0.15) and had moderate activity against Staph. aureus (12.5±0.18). The n-Hexane extract was completely inactive against the test organisms while the methanol extract showed poor activity against the test organisms. The present study adds to the existing literature on Cyphostemma adenocaule with scientific evidence into its biological properties.

scholarly journals Evaluation of anti ulcer activity of ethanolic root extract of Beta vulgaris in rats

2017 ◽  
Vol 6 (2) ◽  
pp. 359 ◽  
Author(s):  
K. Samyuktha ◽  
Krishna Mohan Chinnala ◽  
G. Prathiba ◽  
D. Rajendhar ◽  
P. Smana Reddy
Keyword(s):  
Beta Vulgaris ◽  
Maximum Dose ◽  
Antiulcer Activity ◽  
Root Extract ◽  
Alcoholic Extract ◽  
Free Acidity ◽  
Phytochemical Screening ◽  
Ulcer Index ◽  
Medicinal Uses ◽  
Pylorus Ligation

Background: Beta vulgaris (chenopodiacea) is a plant reported for its variety of ethnic medicinal uses. Hence we have planned to screen anti ulcer activity of root of the plant with the alcoholic extract. Root powders successively extracted with alcohol and were subjected for phytochemical screening to identify different phytoconstituents.Methods: Anti ulcer activity was evaluated in various animal models like pylorus ligation and ethanol induced ulcer models in rats.Results: Preliminary phytochemical screening revealed the presence of alkaloids, flavonoids, carbohydrates, saponins, polyphenols. No mortality was observed with root extract up to maximum dose level of 4g/kg. Further alcoholic extract of 200 and 400mg/ kg / p.o significantly (p˂0.01) reduced the ulcer score, ulcer number, ulcer index, free acidity and total acidity in pylorus ligation and ethanol induced ulcer models in rats.Conclusions: The present study revealed that the root extract of Beta vulgaris has antiulcer activity.

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