We have synthesized a trio of gallium complexes bearing 9-anthraldehyde thiosemicarbazones. The complexes were assessed for their anticancer activity and their biophysical reactivity was also investigated.
The results of docking studies with DNA, ribonucleotide reductase and human serum albumin, however showed that the complex with the best biological activity had the largest binding constant to DNA.
Electrospray ionization mass spectrometry (ESI-MS) was recorded using the Advion expression Compact Mass Spectrometer (CMS).
Xention Limited, United Kingdom; University of Ljubljana, Slovenia
Abstract
The rodent neuroblastoma cell line, ND7-23, is used to express voltage-dependent sodium (Nav) and other neuronal ion channels resistant to heterologous expression in Chinese hamster ovary (CHO) or human embryonic kidney (HEK) cells. Their advantage is that they provide endogenous factors and signaling pathways to promote ion channel peptide folding, expression, and function at the cell surface and are also amenable to automated patch clamping. However, ND7-23 cells exhibit endogenous tetrodotoxin (TTX)-sensitive Nav currents, and molecular profiling has revealed the presence of Nav1.2, Nav1.3, Nav1.6, and Nav1.7 transcripts, but no study has determined which subtypes contribute to functional channels at the cell surface. In this publication, we profiled the repertoire of functional Nav channels endogenously expressed in ND7-23 cells using the QPatch automated patch clamp platform and selective toxins and small molecules.
Mass spec analysis was performed using the Advion expression Compact Mass Spectrometer (CMS).
Mokpo National University, Gachon University, Hanyang University, Gachon Medical Research Institute, South Korea; University of Bremen, Germany
Abstract
G protein-coupled receptor (GPR) 119 is expressed in pancreatic β-cells and intestinal L cells, and is involved in glucose-stimulated insulin secretion and glucagon-like peptide-1 (GLP-1) release, respectively. Therefore, the development of GPR119 agonists is a potential treatment for type 2 diabetes. In this publication, screened 1500 natural plant extracts for GPR119 agonistic actions and investigated the most promising extract, that from Angelica dahurica (AD), for hypoglycemic actions in vitro and in vivo.
Electrospray ionization mass spectrometry (ESI-MS) data was measured using the Advion expression CMS
A library of thiosemicarbazide hybrid 2-(aldo-polyhydroxyalkyl)benzimidazole derivatives have been designed and synthesized with simple and eco-friendly methodologies. The structures of the compounds have been elucidated with the aid of elemental analysis, IR, mass and 1H NMR spectral data. These novel synthesized compounds have been evaluated for their antibacterial activity against two gram-positive bacteria (S. aureus and S. pyogenus) and two gram-negative bacteria (P. aeruginosa and E. coli). The title compounds have also been studied for their antifungal activity against C. albicans, A. niger and A. clavatus using the broth dilution technique.
Mass spec analysis was performed using the Advion expression Compact Mass Spectrometer (CMS) with electrospray ionization (ESI).
The preparation of cross-linked nanosheets with 1–2 nm thickness and predefined shape was achieved by lithographic immobilization of trimethacryloyl thioalkanoates onto the surface of Si wafers, which were functionalized with 2-(phenacylthio)acetamido groups via a photoinduced reaction. Subsequent cross-linking via free radical polymerization as well as a phototriggered Diels–Alder reaction under mild conditions on the surface led to the desired nanosheets. Electrospray ionization mass spectrometry (ESI-MS), X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), as well as infrared reflection-absorption spectroscopy (IRRAS) confirmed the success of individual surface-modification and cross-linking reactions.
ESI-MS analysis was performed using the Advion Interchim Scientific® expression® Compact Mass Spectrometer (CMS).
A convenient one-pot, multi-component and solvent free procedure for the preparation of substituted 2-amino-5-aryl-1,3,4-oxadiazoles has been achieved. The method is a significant improvement over previously reported synthesis. Reaction of acid chlorides with hydrazine hydrate and isothiocynates under microwave-irradiation (MWI) afforded the corresponding 1,3,4-oxadiazole derivatives in high yields with high purity. All synthesized compounds were characterized by FT-IR, proton and carbon NMR, mass spectroscopy and elemental analysis. A possible mechanism is proposed for the cyclodesulfurization based on the results of this study.
Mass spec analysis was performed on the Advion expression Compact Mass Spectrometer (CMS) using electrospray ionization (ESI).
Guru Ghasidas University, University of South Dakota
A one-pot practical, efficient, and environmentally benign multicomponent synthesis of 4H-pyrans and polysubstituted aniline derivatives of biological, pharmacological, and optical applications has been developed using a very mild, neutral, and reusable silica nanoparticles as catalyst. The 4H-pyran derivatives were synthesized by a three component reaction of an aldehyde, malononitrile, and 5,5-dimethyl-1,3-cyclohexanedione or ethyl acetoacetate at room temperature or refluxing in ethanol. Alternatively, polysubstituted anilines were synthesized via a four component reaction of an aldehyde, a ketone, and two equivalents of malononitrile in ethanol.
Mass spec analysis was carried out using an Advion expression Compact Mass Spectrometer (CMS).
University of Surrey, Surrey and Borders Partnership NHS Foundation Trust, Advion, Ltd.
Abstract
Surface mass spectrometry methods can be difficult to use effectively with low cost, portable mass spectrometers. A new analytical method is presented where analytes are extracted from a sample using a solvent flushed across the surface under high pressure, separated using a chromatography column and then analysed using the Advion Interchim Scientific® expression® Compact Mass Spectrometer (CMS). In this publication, we demonstrate the efficacy of the method for the quantitative detection of cocaine and benzoylecgonine in urine and oral fluid.
In this note, a quick and direct screening method for the detection of illicit drugs on paper currency is introduced using the Touch Express™ Open Port Sampling Interface (OPSI) on the Advion expression® Compact Mass Spectrometer (CMS).A range of paper currency bills from different countries were analyzed for traces of illicit drugs.
Learn how SpiroChem AG (Switzerland) utilized the Advion expression® Compact Mass Spectrometer (CMS) and Plate Express™ TLC Plate Reader for reaction monitoring and compound identification to aide in accelerating drug discovery.
Abstract:
In highly competitive research environments, the ability to access more complex structural spaces efficiently is a predictor of a company’s ability to generate novel IP-protected small molecule candidates with adequate properties, hence filling their development pipelines. SpiroChem is consistently developing new synthetic methodologies and strategies to access complex molecular structure, thereby facilitating and accelerating small molecule drug discovery. Pushing the limits of what are perceived as complex molecular structures allows SpiroChem and its clients to unleash creativity and explore meaningful chemical spaces, which are under-exploited sources of novel active molecules. In this article, we [SpiroChem] explain how we differentiated ourselves in a globalized R&D environment and we provide several snapshots of how efficient methodologies can generate complex structures, rapidly.
