In‐vitro and microbiological assay of functionalized nano‐hybrids to validate their differential efficacy in nano‐theranostics: A combined spectroscopic and computational study

ChemMedChem ◽  
2021 ◽  
Author(s):  
Susmita Mondal ◽  
Ria Ghosh ◽  
Aniruddha Adhikari ◽  
Uttam Pal ◽  
Dipanjan Mukherjee ◽  
...  
Keyword(s):  
Computational Study ◽  
Microbiological Assay

Role of 4-O Galloylchlorogenic Acid in Lung Cancer- An Insilico Approach

2017 ◽  
Vol 9 (5) ◽  
Author(s):  
Jaynthy C. ◽  
N. Premjanu ◽  
Abhinav Srivastava
Keyword(s):  
Lung Cancer ◽  
Cell Proliferation ◽  
In Silico ◽  
Computational Study ◽  
Regulation Mechanism ◽  
Down Regulation ◽  
Fruit Extract ◽  
In Vitro Techniques ◽  
Discovery Studio

Cancer is a major disease with millions of patients diagnosed each year with high mortality around the world. Various studies are still going on to study the further mechanisms and pathways of the cancer cell proliferation. Fucosylation is one of the most important oligosaccharide modifications involved in cancer and inflammation. In cancer development increased core fucosylation by FUT8 play an important role in cell proliferation. Down regulation of FUT8 expression may help cure lung cancer. Therefore the computational study based on the down regulation mechanism of FUT8 was mechanised. Sapota fruit extract, containing 4-Ogalloylchlorogenic acid was used as the inhibitor against FUT-8 as target and docking was performed using in-silico tool, Accelrys Discovery Studio. There were several conformations of the docked result, and conformation 1 showed 80% dock score between the ligand and the target. Further the amino acids of the inhibitor involved in docking were studied using another tool, Ligplot. Thus, in-silico analysis based on drug designing parameters shows that the fruit extract can be studied further using in-vitro techniques to know its pharmacokinetics.

Computational study for suppression of CD25/IL-2 interaction

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Moein Dehbashi ◽  
Zohreh Hojati ◽  
Majid Motovali-bashi ◽  
Mazdak Ganjalikhani-Hakemi ◽  
Akihiro Shimosaka ◽  
...  
Keyword(s):  
Small Molecules ◽  
Cancer Progression ◽  
Immune Escape ◽  
De Novo ◽  
Computational Study ◽  
Treg Cells ◽  
Homology Search ◽  
Small Interfering Rnas

AbstractCancer recurrence presents a huge challenge in cancer patient management. Immune escape is a key mechanism of cancer progression and metastatic dissemination. CD25 is expressed in regulatory T (Treg) cells including tumor-infiltrating Treg cells (TI-Tregs). These cells specially activate and reinforce immune escape mechanism of cancers. The suppression of CD25/IL-2 interaction would be useful against Treg cells activation and ultimately immune escape of cancer. Here, software, web servers and databases were used, at which in silico designed small interfering RNAs (siRNAs), de novo designed peptides and virtual screened small molecules against CD25 were introduced for the prospect of eliminating cancer immune escape and obtaining successful treatment. We obtained siRNAs with low off-target effects. Further, small molecules based on the binding homology search in ligand and receptor similarity were introduced. Finally, the critical amino acids on CD25 were targeted by a de novo designed peptide with disulfide bond. Hence we introduced computational-based antagonists to lay a foundation for further in vitro and in vivo studies.

scholarly journals Pharmacoinformatics and UPLC-QTOF/ESI-MS-Based Phytochemical Screening of Combretum indicum against Oxidative Stress and Alloxan-Induced Diabetes in Long–Evans Rats

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4634
Author(s):  
Md. Shaekh Forid ◽  
Md. Atiar Rahman ◽  
Mohd Fadhlizil Fasihi Mohd Aluwi ◽  
Md. Nazim Uddin ◽  
Tapashi Ghosh Roy ◽  
...  
Keyword(s):  
Blood Glucose ◽  
Immune Modulation ◽  
Computational Study ◽  
Density Lipoprotein ◽  
Control Group ◽  
Esi Ms ◽  
Long Evans ◽  
Antidiabetic Effects

This research investigated a UPLC-QTOF/ESI-MS-based phytochemical profiling of Combretum indicum leaf extract (CILEx), and explored its in vitro antioxidant and in vivo antidiabetic effects in a Long–Evans rat model. After a one-week intervention, the animals’ blood glucose, lipid profile, and pancreatic architectures were evaluated. UPLC-QTOF/ESI-MS fragmentation of CILEx and its eight docking-guided compounds were further dissected to evaluate their roles using bioinformatics-based network pharmacological tools. Results showed a very promising antioxidative effect of CILEx. Both doses of CILEx were found to significantly (p < 0.05) reduce blood glucose, low-density lipoprotein (LDL), and total cholesterol (TC), and increase high-density lipoprotein (HDL). Pancreatic tissue architectures were much improved compared to the diabetic control group. A computational approach revealed that schizonepetoside E, melianol, leucodelphinidin, and arbutin were highly suitable for further therapeutic assessment. Arbutin, in a Gene Ontology and PPI network study, evolved as the most prospective constituent for 203 target proteins of 48 KEGG pathways regulating immune modulation and insulin secretion to control diabetes. The fragmentation mechanisms of the compounds are consistent with the obtained effects for CILEx. Results show that the natural compounds from CILEx could exert potential antidiabetic effects through in vivo and computational study.

scholarly journals Antioxidant Properties of Ergosterol and Its Role in Yeast Resistance to Oxidation

Antioxidants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1024
Author(s):  
Sebastien Dupont ◽  
Paul Fleurat-Lessard ◽  
Richtier Gonçalves Cruz ◽  
Céline Lafarge ◽  
Cédric Grangeteau ◽  
...  
Keyword(s):  
Computational Study ◽  
Antioxidant Properties ◽  
Beneficial Effects ◽  
Tert Butyl Hydroperoxide ◽  
Resistance To Oxidation ◽  
Specific Accumulation ◽  
The Subject

Although the functions and structural roles of sterols have been the subject of numerous studies, the reasons for the diversity of sterols in the different eukaryotic kingdoms remain unclear. It is thought that the specificity of sterols is linked to unidentified supplementary functions that could enable organisms to be better adapted to their environment. Ergosterol is accumulated by late branching fungi that encounter oxidative perturbations in their interfacial habitats. Here, we investigated the antioxidant properties of ergosterol using in vivo, in vitro, and in silico approaches. The results showed that ergosterol is involved in yeast resistance to tert-butyl hydroperoxide and protects lipids against oxidation in liposomes. A computational study based on quantum chemistry revealed that this protection could be related to its antioxidant properties operating through an electron transfer followed by a proton transfer mechanism. This study demonstrates the antioxidant role of ergosterol and proposes knowledge elements to explain the specific accumulation of this sterol in late branching fungi. Ergosterol, as a natural antioxidant molecule, could also play a role in the incompletely understood beneficial effects of some mushrooms on health.

scholarly journals Absorption Characteristics of Combination Medication of Realgar and Indigo Naturalis: In Vitro Transport across MDCK-MDR1 Cells and In Vivo Pharmacokinetics in Mice after Oral Administration

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Miao Zhang ◽  
Lin Guo ◽  
Long-Fei Lin ◽  
Chang-Hai Qu ◽  
Xing-Bin Yin ◽  
...  
Keyword(s):  
Cell Line ◽  
K562 Cell ◽  
Computational Study ◽  
Arsenic Concentration ◽  
K562 Cells ◽  
Cell Permeability ◽  
K562 Cell Line ◽  
Apparent Permeability ◽  
Indigo Naturalis

Realgar and indigo naturalis are clinically combined to treat varieties of leukemia. Exploring the drug-drug interactions might be beneficial to find active substances and develop new targeted drugs. This study aimed at exploring the change of arsenic concentration in mice and across MDCK-MDR1 cells and the cytotoxicity on K562 cells when realgar and indigo naturalis were combined. In the presence or absence of indigo naturalis, pharmacokinetics and cell-based permeability assays were used to evaluate the change of arsenic concentration, and K562 cell line was applied to evaluate the change of cytotoxicity. The drug concentration-time profiles exhibited that the combination medication group generated higher AUC, thalf, and longer MRT for arsenic, compared with the single administration of realgar. The apparent permeability coefficients (Papp) of bidirectional transport in MDCK-MDR1 cell permeability experiments showed that arsenic permeability obviously went up when indigo naturalis was incubated together. The combination medication significantly decreased the cell viability of K562 cells when both the concentration of realgar and the concentration of indigo naturalis were nontoxic. The pharmacokinetic research, the MDCK-MDR1 based permeability study, and the K562 cytotoxicity study were united together to verify the combination medication of realgar and indigo naturalis enhanced the absorption and the permeability across cells for arsenic and effectively inhibited the proliferation of K562 cell line. The molecular binding of As4S4 and indirubin was analyzed by computational study. It is predicted that the formation of the complex [As4S4…Indirubin] involves noncovalent interaction that changes the concentration of arsenic.

scholarly journals Design, Synthesis, Characterization, Computational Study and In-vitro Antioxidant and Anti-inflammatory Activities of Few Novel Pyrazol-3-one Derivatives

2021 ◽  
pp. 220-231
Author(s):  
Aziz Unnisa ◽  
B. Anupama ◽  
Humera Banu ◽  
Syeda B. Fatima ◽  
K. N. V. Chenchu Lakshmi ◽  
...  
Keyword(s):  
Computational Study ◽  
Efficacy And Safety ◽  
Dpph Assay ◽  
Design Synthesis ◽  
Synthetic Compounds ◽  
Highly Active ◽  
Anti Inflammatory ◽  
Further Development ◽  
Mutagenic Compound

Aim: To design, synthesize and perform computational study on a few Novel pyrazol-3-one derivatives. Study design:  Experimental study. Methodology: A series of 6-aryl substituted pyrimidine azodyes were synthesized by coupling phenyl pyrimidine 2-amine with different aromatic amines. The synthetic compounds were screened for their in-vitro antioxidant and anti-inflammatory activities. The Computational study of designed compounds was done by OCHEM, Molinspiration cheminformatics, Datawarrior, and Swiss ADME. DPPH assay was used to determine the antioxidant activity and heat hemolysis method for anti-inflammatory activity. Results: Molinspiration, Data Warrior, Ochem which are helpful to predict molecule general properties, bioactive scores, toxicity, and drug-likeness. Data Warrior results inferred that the compounds possess moderately active towards mutagenic (compound 2, 11), reproductive (compound 6, 7, 8), and highly active towards Tumorogenic (compound 2) toxicities. OCHEM results showed that most of the synthesized compounds were found to be non-inhibitors of all the subtypes of cytochrome P450 except compound 8. All compounds under this study were effective scavengers of free radicals except the compounds 1, 2, 6, 10. Invitro Anti-inflammatory studies have shown that the compounds (6, 7, 8, 9, 13) active toward heat hemolysis. Conclusion: The synthesized compounds were comprehensively studied and targets were identified rendering them as lead molecules for further development of newer agents with greater efficacy and safety.

Evaluation of in vitro serial antibiotic elution from meropenem-impregnated polymethylmethacrylate beads after ethylene oxide gas and autoclave sterilization

2011 ◽  
Vol 24 (01) ◽  
pp. 39-44 ◽  
Author(s):  
C. Langston ◽  
S. Givaruangsawat ◽  
R. McLaughlin ◽  
L. A. Báez
Keyword(s):  
Ethylene Oxide ◽  
Statistical Difference ◽  
Concentration Level ◽  
Negative Control ◽  
Microbiological Assay ◽  
Zone Of Inhibition ◽  
Time Periods ◽  
Pmma Beads ◽  
Ethylene Oxide Gas

Summary Objectives: To determine the elution properties of meropenem and to compare the elutions of meropenem-impregnated polymethylmethacrylate (PMMA) beads without sterilization (P-M-C) to those sterilized with steam (P-M-A) and ethylene oxide gas (P-M-EO). Methods: A commercial bead mould was used to produce four groups of beads: one group without antibiotic (negative control), and three groups of meropenem-impregnated beads: P-M-C, P-M-A, and P-M-EO. The beads were placed in a phosphate buffered solution and eluent samples were collected. Concentrations of the antibiotic in eluent samples from the two sterilized groups and the control beads were determined using a microbiological assay at 1, 3, 6 and 12 hours and at 1, 2, 3, 6, 9, 12, 15, 18, 22, 26, and 30 days. Results: The microbiological assay resulted in no zone of inhibition at all time periods for the P-M-A samples and the samples of PMMA without antimicrobial. The meropenem concentration on the eluent remained above 4 mcg/ml for 15 days in the P-M-C group and until day 18 for P-M-EO group. There was no statistical difference in AUC0-∞ (p <0.318), however significance did occur for MRT (p <0.005) when comparing P-M-C and P-M-EO with the later being higher. Discussion: The meropenem incorporated in the PMMA beads eluted effectively and gradually decreased after the 24 hour peak, but remained above the concentration level of 4 mcg/ml for 15 days in the P-M-C group and until day 18 for P-M-EO group. Ethylene oxide does not adversely affect meropenem’s elution from PMMA beads.

scholarly journals Microbiological Assay for Ceftazidime Injection

2007 ◽  
Vol 90 (5) ◽  
pp. 1379-1382 ◽  
Author(s):  
Andréia De Haro Moreno ◽  
Hérida Regina Nunes Salgado
Keyword(s):  
Antibacterial Activity ◽  
Regression Analysis ◽  
Standard Deviation ◽  
Staphylococcus Epidermidis ◽  
Test Organism ◽  
Calibration Graph ◽  
Microbiological Assay ◽  
Parallel Model ◽  
Relative Standard

Abstract A simple, sensitive, and specific biodiffusion assay for the antibacterial ceftazidime was developed using a strain of Staphylococcus epidermidis (ATCC 12228) as the test organism. Ceftazidime was measured in powder for injection at concentrations ranging from 100 to 400 g/mL. The calibration graph for ceftazidime was linear (r2 = 1), and the method validation showed that it was precise (relative standard deviation = 0.415) and accurate. The results obtained by biodiffusion assay were statistically calculated by linear parallel model and by means of regression analysis and were verified using analysis of variance. It was concluded that the microbiological assay is satisfactory for in vitro quantification of the antibacterial activity of ceftazidime in pharmaceuticals.

Pyrazole Schiff Base Hybrids as Anti-Malarial Agents: Synthesis, In Vitro Screening and Computational Study

2018 ◽  
Vol 21 (3) ◽  
pp. 194-203 ◽  
Author(s):  
Shilpy Aggarwal ◽  
Deepika Paliwal ◽  
Dhirender Kaushik ◽  
Girish Kumar Gupta ◽  
Ajay Kumar
Keyword(s):  
Schiff Base ◽  
Antimalarial Activity ◽  
Computational Study ◽  
Docking Study ◽  
Docking Studies ◽  
Binding Energies ◽  
Study Results ◽  
Wide Range ◽  
Parasite Plasmodium Falciparum

Background: Malaria is one of the most vital infectious diseases caused by protozoan parasites of the Plasmodium genus. As P. falciparum, the cause of most of the severe cases of malaria, is increasingly resistant to available drugs such as amodioquine, chloroquine, artemisinin, and antifolates, there is an urgent need to identify new targets for chemotherapy. Objective: This study screened novel pyrazole derivatives carrying iminium & benzothiazole group for antimalarial potential against P. falciparum chloroquine sensitive (3D7) strain. Materials & Methods: Several pyrazole schiff base hybrids with a wide range of substitution have been synthesized via condensation of substituted aniline with substituted 4-formylpyrazole and evaluated for their in vitro antimalarial activity against asexual blood stages of human malaria parasite, Plasmodium falciparum. The interaction of these conjugate hybrids was also investigated by molecular docking studies in the binding site of P. falciparum cystein protease falcipain-2. The pharmacokinetic properties were also studied using ADME prediction. Results: Among all compounds, 6bf and 6bd were found to be potential molecules with EC50 1.95µg/ml and 1.98µg/ml respectively. Docking study results reveal that the pyrazole schiff base derivatives occupy the PfFP binding sites and they show good interactions with significant values of binding energies. Conclusion: We provide evidence which implicates pyrazole Schiff base hybrids as potential prototypes for the development of antimalarial agents.

Sign in / Sign up

Export Citation Format

Share Document