Investigating the Antiproliferative Activity of Novel 4-Chloro-8-Nitro-1,2-Dihydro-3-Quinoline Acylhydrazones on Human Cervical Cancer Cell Lines.

A new series of acyl hydrazones have been synthesized from 4-chloro-8-nitro-1,2-dihydroquinoline-3-carbaldehyde. These compounds were characterized using various spectroscopic techniques. Density functional theoretical (DFT) studies were conducted to understand the correlation between electronic parameters and biological activity.

Nitroquinolone Fused Salicyl and Naphthyl Hydrazone Fluorescent Probes for the Detection of Feand Pb Ions.

The application of quinolones stretches over a large umbrella of medicinal field as well as chemosensor due to the presence of privileged heterocyclic aromatic rig system. Salicyl and Naphthyl Hydrazide motifs are also established fluorophore groups. Therefore in this work, we have designed and synthesized Salicyl hydrazide (3a-c) and naphthyl hydrazide fused nitroquinolones (5a-c) investigated for their fluorescent behaviour.

Anti-proliferative activity of nitroquinolone fused acylhydrazones as non-small cell human lung cancer agents.

A new series of 8-nitroquinolone-based aromatic heterocyclic acyl hydrazones have been synthesised and characterised through various spectroscopic techniques. They were theoretically examined for molecular docking with various proteins related to the apoptosis of the non-small cell lung cancer cell line A549. The results indicate that the possible modes of interaction of all the synthesised compounds are compatible for use as anti-proliferative drugs.

New alkali tolerant β-galactosidase from Paracoccus marcusii KGP - A promising biocatalyst for the synthesis of oligosaccharides derived from lactulose (OsLu), the new generation prebiotics.

The enzyme β-galactosidase can synthesise novel prebiotics such as oligosaccharides derived from lactulose (OsLu) which can be added as a supplement in infant food formula. In this study, the intracellular β-galactosidase produced by the alkaliphilic bacterium Paracoccus marcusii was extracted and purified to homogeneity using hydrophobic and metal affinity chromatography. The purification resulted in 18 U/mg specific activity, with a yield of 8.

Novel Quinoline-Based Thiazole Derivatives for Selective Detection of Fe, Fe, and Cu Ions.

New quinoline-based thiazole derivatives and were synthesized and characterized by various spectroscopic and single-crystal X-ray crystallographic studies. The metal-sensing properties of the probes were further examined by absorption and fluorescence spectrometry. The fluorescence intensity of and was remarkably quenched during the addition of Fe, Fe, and Cu ions in THF/HO (1:1) at pH = 7.

Application of real sample analysis and biosensing: Synthesis of new naphthyl derived chemosensor for detection of Al ions.

A new chemosensor (NANH) based on naphthyl moiety was synthesized with good selectivity and sensitivity towards Al ions via the inhibition by operating through dual mechanisms like photo-induced electron transfer (PET) and excited-state intramolecular proton transfer (ESIPT). The synthesized NANH was validated by various techniques such as H, C NMR and mass spectrum. While prominent fluorescent enhancement was observed from the NANH upon binding with Al ions, however, other metal ions have not responded in the emission spectrum.

A novel 8-nitro quinoline-thiosemicarbazone analogues induces G1/S & G2/M phase cell cycle arrest and apoptosis through ROS mediated mitochondrial pathway.

A series of novel 8-nitro quinoline-based thiosemicarbazone analogues were synthesized and characterized by various spectroscopic and single crystal X-ray analyses. The potent antitumor effects of synthesized compounds towards the cancer cells were evaluated by MTT assay. Amongst, the compound 3a exhibited the highest inhibitory activity and the compounds 3f and 3b were also showed significant activity.

Synthesis and X-ray study of dispiro 8-nitroquinolone analogues and their cytotoxic properties against human cervical cancer HeLa cells.

A series of unique dispiro analogues containing an oxindole pyrrolidine 8-nitroquinolone hybrid has been obtained through a one-pot three-component 1,3-dipolar cycloaddition of azomethine ylides generated from the condensation of isatins and benzylamine with ()-3-arylidene-2,3-dihydro-8-nitro-4-quinolones. The structures of the newly synthesized compounds were characterized by using different spectroscopic techniques and by X-ray diffraction studies of their regio- and stereochemistry. All the synthesized compounds were screened for cytotoxic activity against the human cervical cancer cell line HeLa.

An efficient new dual fluorescent pyrene based chemosensor for the detection of bismuth (III) and aluminium (III) ions and its applications in bio-imaging.

A new simple pyrene based schiff base chemosensor 1 (nicotinic acid pyren-1-ylmethylene-hydrazide) has been constructed and is prepared from 1-pyrenecarboxaldehyde and nicotinic hydrazide. Notably, the chemosensor 1 exhibited remarkable colour changes while in the presence of trivalent metal ions like Bi & Al ion in DMSO-HO, (1:1 v/v, HEPES = 50 mM, pH = 7.4).

Antidiabetic effects of scoparic acid D isolated from Scoparia dulcis in rats with streptozotocin-induced diabetes.

We evaluated the antihyperglycaemic effect of scoparic acid D (SAD), a diterpenoid isolated from the ethanol extract of Scoparia dulcis in streptozotocin (STZ)-induced diabetic male Wistar rats. SAD was administered orally at a dose of 10, 20 and 40 mg kg(-1) bodyweight for 15 days. At the end of the experimental period, the SAD-treated STZ diabetic rats showed decreased levels of glucose as compared with diabetic control rats.

Isolation of 4-chloro-3-formyl-2-(2-hydroxyethene-1-yl) quinolines by Vilsmeier Haack reaction on quinaldines: Construction of diazepino quinoline heterocycles and their antimicrobial and cytogenetic studies.

Application of Vilsmeier conditions to 4-hydroxyquinaldines gives 4-chloro-3-formyl-2-(2-hydroxyethene-1-yl)-quinolines as an intermediate. The latter is utilized to prepare diazepino quinolines on treatment with phenylhydrazine hydrochloride. All the synthesized compounds have been screened for their antibacterial and antifungal as well as cytogenetic activities.