2-2--azino-di-(3-ethylbenzothiazoline)-6-sulfonic-acid and Neoplasms

This survey was conducted to fabrication of PLGA-based nanosystems modified with PEG, chitosan and folic acid to delivery colchicine to cancer cells and to investigate its antioxidant and pro-apoptotic effects. The dual emulsion-evaporation solvent method was used for loading of colchicine on PEGylated PLGA nanoparticles (COL-PP-NPs) and after surface modification with chitosan and folic acid (COL-PPCF-NPs), the nanoparticles were characterized by DLS, SEM and FTIR methods. The HPLC procedure was used to assess the amount of FA binding and COL loading. Antioxidant capacity (ABTS and DPPH free radical scavenging) and toxicity (MTT) of COL-PPCF-NPs were evaluated and then cell inhibition mechanism was assessed by AO/PI staining, flow cytometry and qPCR assay. COL-PPCF-NPs with a size of 250 nm were synthesized in a stable (zeta potential: +34 mV) and mono-dispersed (PDI: 0.32) manner. FA binding and COL loading were reported to be 55% and 89.5%, respectively. COL-PPCF-NPs showed antioxidant effects by inhibiting the free radicals ABTS (108.07 µg/ml) and DPPH (361.61 µg/ml). The selective toxicity of COL-PPCF-NPs against HT-29 cancer cells (118.5 µg/ml) compared to HFF cells was confirmed by MTT data. Increased apoptotic cells (red color) in AO/PI staining, cell arrest in phase SubG1 and G2-M, and altered expression of apoptosis genes confirmed the occurrence of apoptosis in HT-29 treated cells. The use of PPCF-NPs system for delivery of COL can lead to selective toxicity against cancer cells and induction of apoptosis in these cells by folate-mediated binding mechanism at folate receptor positive HT-29 cancer cells.

Topics: Antioxidants; Chitosan; Colchicine; Drug Carriers; Folic Acid; Humans; Nanoparticles; Neoplasms; Particle Size; Polylactic Acid-Polyglycolic Acid Copolymer

The determination of cytochrome c in the human serum sample is a regular medical investigation performed to assess cancer diseases. Herein, we used interferometric reflectance spectroscopy (IRS) based biosensor for the determination of cytochrome c. For this purpose first, the nanoporous anodic alumina (NAA) was fabricated. Then, the NAA pore walls were functionalized with 3-aminopropyl trimethoxy silane (NAA-NH

Topics: Aluminum Oxide; Benzothiazoles; Biosensing Techniques; Cytochromes c; Humans; Hydrogen Peroxide; Interferometry; Nanopores; Neoplasms; Spectrum Analysis; Sulfonic Acids; Trypsin

A highly sensitive and selective colorimetric assay based on a multifunctional molecular beacon with palindromic tail (PMB) was proposed for the detection of target p53 gene. The PMB probe can serve as recognition element, primer, and polymerization template and contains a nicking site and a C-rich region complementary to a DNAzyme. In the presence of target DNA, the hairpin of PMB is opened, and the released palindromic tails intermolecularly hybridize with each other, triggering the autonomous polymerization/nicking/displacement cycles. Although only one type of probe is involved, the system can execute triple and continuous polymerization strand displacement amplifications, generating large amounts of G-quadruplex fragments. These G-rich fragments can bind to hemin and form the DNAzymes that possess the catalytic activity similar to horseradish peroxidase, catalyzing the oxidation of ABTS by H

Topics: Base Sequence; Benzothiazoles; Biosensing Techniques; Chromogenic Compounds; Colorimetry; DNA; DNA, Catalytic; Genes, p53; Neoplasms; Nucleic Acid Amplification Techniques; Nucleic Acid Hybridization; Sulfonic Acids

Echinacea (Asteraceae) is used because of its pharmacological properties. However, there are few studies that integrate phytochemical analyses with pharmacological effects.. Evaluate the chemical profile and biological activity of hydroalcoholic Echinacea extracts.. The difference in the chemical and pharmacological properties among extracts highlights the need to consider strategies and policies for standardization of commercial herbal extracts in order to guarantee the safety and identity of this type of products.

Topics: Alloxan; Animals; Anti-Inflammatory Agents; Antineoplastic Agents, Phytogenic; Antioxidants; Benzothiazoles; Biomarkers; Biphenyl Compounds; Blood Glucose; Carrageenan; Cell Proliferation; Diabetes Mellitus, Experimental; Echinacea; Edema; HeLa Cells; Humans; Hypoglycemic Agents; Male; MCF-7 Cells; Neoplasms; Phytochemicals; Phytotherapy; Picrates; Plant Extracts; Plants, Medicinal; Rats, Wistar; Sulfonic Acids; Time Factors

The current work reports the synthesis, spectroscopic studies, antiradical and antiproliferative properties of four ruthenium(III) complexes of heterocyclic tridentate Schiff base bearing a simple 2',4'-dihydroxyacetophenone functionality and ethylenediamine as the bridging ligand with RCHO moiety. The reaction of the tridentate ligands with RuCl₃·3H₂O lead to the formation of neutral complexes of the type [Ru(L)Cl₂(H₂O)] (where L = tridentate NNO ligands). The compounds were characterized by elemental analysis, UV-vis, conductivity measurements, FTIR spectroscopy and confirmed the proposed octahedral geometry around the Ru ion. The Ru(III) compounds showed antiradical potentials against 2,2-Diphenyl-1-Picrylhydrazyl (DPPH) and 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals, with DPPH scavenging capability in the order: [(PAEBOD)RuCl₂] > [(BZEBOD)RuCl₂] > [(MOABOD)RuCl₂] > [Vit. C] > [rutin] > [(METBOD)RuCl₂], and ABTS radical in the order: [(PAEBOD)RuCl₂] < [(MOABOD)RuCl₂] < [(BZEBOD)RuCl₂] < [(METBOD)RuCl₂]. Furthermore, in vitro anti-proliferative activity was investigated against three human cancer cell lines: renal cancer cell (TK-10), melanoma cancer cell (UACC-62) and breast cancer cell (MCF-7) by SRB assay.

Topics: Antineoplastic Agents; Benzothiazoles; Biphenyl Compounds; Cell Line, Tumor; Cell Proliferation; Coordination Complexes; Free Radical Scavengers; Heterocyclic Compounds; Humans; Ligands; Neoplasms; Picrates; Ruthenium; Schiff Bases; Sulfonic Acids

In the human diet, the consumption of fresh fruits and vegetables is important in maintaining good health and in preventing chronic diseases. It is known that plant-derived food is a powerful source of chemopreventive molecules, i.e. antioxidants, and spinach (Spinacia oleracea L., Chenopodiaceae) possesses a wide range of metabolites with such biological activity. Plant stress response could lead to the production of metabolites with high value for human health and this could be a tool to enhance the production of molecules with antioxidant activity in plants.. Data reported in this paper confirm the antioxidant properties of spinach plants, and show a strong antiproliferative activity of leaf extract on HT-29 human cell line. Besides, the hypoxic stress seems to affect the pool of antioxidant molecules present in spinach leaves, as verified by means of HPLC-MS/MS analysis and the aluminium chloride and ABTS assays.. Our findings represent a basis for improving the biological and pharmacological properties of spinach plants, including the use of different growth conditions to modulate the phytocomplex profile of spinach.

Topics: Adaptation, Physiological; Adenocarcinoma; Agriculture; Antineoplastic Agents, Phytogenic; Antioxidants; Benzothiazoles; Colonic Neoplasms; HT29 Cells; Humans; Neoplasms; Oxygen; Phytotherapy; Plant Extracts; Plant Leaves; Spinacia oleracea; Stress, Physiological; Sulfonic Acids; Vegetables

Eight new dihydrobenzofuran neolignans, pinnatifidanin C I-VIII (1-8), together with two known analogs (9-10) were isolated from the seeds of Crataegus pinnatifida. Their structures were elucidated by spectroscopic analyses, especially 1D, 2D NMR and CD spectra. The cytotoxic activities of all isolates against human cancer cell lines were assayed, and most interestingly, compound 10 revealed preferred cytotoxicity on the HT-1080 cell line and displayed much stronger inhibitory activity (IC50=8.86 μM) compared with positive control 5-fluorouracil (IC50=35.62 μM). Meanwhile, antioxidant activities of all the isolates were evaluated using 2,2-diphenyl-1-pikrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) assays, and the results showed that most of the isolates exhibited potent antioxidant activity.

Topics: Antineoplastic Agents, Phytogenic; Antioxidants; Benzofurans; Benzothiazoles; Biphenyl Compounds; Cell Line, Tumor; Crataegus; Humans; Inhibitory Concentration 50; Lignans; Molecular Structure; Neoplasms; Phytotherapy; Picrates; Plant Extracts; Seeds; Sulfonic Acids