Background. CD437, an analog of vitamin A, is agonist the retinoic acid γ-receptor (RARγ). CD437 also known to cause p53-independent DNA damage by a mechanism independent RAR-mediated pathway. In cancer patients, iron deficiency constantly detect, delivery tissues destroyed. Aim. To study effect on metabolism in metastatic melanoma cells, Mel Z. Materials and methods. this 2D cultivation Z phas...

Herein we aimed to understand how nanoscale clustering of RGD ligands alters the mechano-regulation of their integrin receptors. We combined molecular tension fluorescence microscopy with block copolymer micelle nanolithography to fabricate substrates with arrays of precisely spaced probes that can generate a 10-fold fluorescence response to pN-forces. We found that the mechanism of sensing lig...

Platelet glycoprotein lb (GpIb), a receptor for von Willebrand’s factor (vWF), was studied by way of fluorescence flow cytometry. Using a sandwich staining technique, Gplb was identified by a monoclonal antibody (6Di ) directed against an epitope close to the vWF binding site. Platelets from normal individuals were symmetrically distributed with respect to Gplb content. Treatment of washed plat...

A Thiazole Orange conjugated with folate derivative was synthesized in two steps. Firstly, folate was coupled with 1-(3-aminopropyl)-4-methylquinolinium bromide to afford folate-methylquinolinium bromide, which then reacted with benzothiazolium to obtain the title folate-conjugated compound. The compound was evaluated by ¹H-NMR MS, TG/DTA and fluorescence spectroscopic methods. The title compou...

A novel reversible fluorescence turn-on chemosensor 1 for Hg(2+) was constructed based on a new receptor composed of an S atom and an alkene moiety. The sensor showed a large fluorescence enhancement response (1000-fold enhancement), high selectivity, and high sensitivity with a detection limit of 27.5 nM. Significantly, the reversible sensor functioned well in the near pure aqueous medium and ...

Chemotherapy and hormonal treatment decisions for breast cancer are influenced by the expression of tumor biomarkers, including estrogen receptor, progesterone receptor and human epidermal growth hormone receptor 2 (HER2/neu). These biomarkers are most commonly assessed by immunohistochemical staining and fluorescence in situ hybridization studies performed on breast cancer biopsy specimens. Bi...

The membrane penetration depths of tryptophan residues in the nicotinic acetylcholine receptor from Torpedo californica have been analyzed in reconstituted membranes containing purified receptor and defined lipids. Dioleoylphosphatidylcholine and three spin-labeled phosphatidylcholines with the nitroxide group at three different positions on the fatty acyl chain were used for reconstitution of ...

A new "naked-eye" and ratiometric fluorescent zinc sensor (TAQ) of carboxamidoquinoline with 2-chloro-N-(quinol-8-yl)-acetamide as a receptor was designed and synthesized. The sensor shows good water solubility and high selectivity for sensing; about a 15-fold increase in fluorescence quantum yield and a 100 nm red-shift of fluorescence emission upon binding Zn²⁺ in aqueous HEPES buffer solutio...

We present a novel imaging technique with super-resolution axial sensitivity, exploiting the changes in fluorescence lifetime above a plasmonic substrate. Using conventional confocal fluorescence lifetime imaging, we show that it is possible to deliver down to 6 nm axial position sensitivity of fluorophores in whole biological cell imaging. We employ this technique to map the topography of the ...

The serotonin(1A) receptor is a representative member of the G-protein coupled receptor (GPCR) superfamily and serves as an important target in the development of therapeutic agents for neuropsychiatric disorders. Oligomerization of GPCRs is an important contemporary issue since it is believed to be a crucial determinant for cellular signaling. In this work, we monitored the oligomerization sta...