Abstract Organic electrochemistry is a technique that allows for the heterogeneous redox reactions avoiding both use of stoichiometric amounts reagents and resulting formation by-products. In fact, reagent in these electron, which naturally eco-friendly produces no side compounds. It therefore quite obvious can be classified as “green” technology. The this methodology synthesis β-lactams not no...

Molecular oxygen (O2) is a sustainable oxidation reagent. O2 strongly oxidizing but kinetically stable and its final reaction product water. For these reasons learning how to activate steer reactivity along desired pathways longstanding challenge in chemical research.[1] Activation of ground-state diradical can occur either via conversion singlet or by one-electron reduction superoxide. Many en...

Cysteine sulfenic acids in proteins can be identified by their ability to form adducts with dimedone, but this reagent imparts no spectral or affinity tag for subsequent analyses of such tagged proteins. Given its similar reactivity toward cysteine sulfenic acids, 1, 3-cyclohexadione was synthetically modified to an alcohol derivative and linked to fluorophores based on isatoic acid and 7-metho...

Acidic potassium permanganate chemiluminescence enables direct post-column detection of glutathione, but its application to assess the redox state of a wider range of biological fluids and tissues is limited by its sensitivity. Herein we show that the simple on-line addition of an aqueous formaldehyde solution not only enhances the sensitivity of the procedure by two orders of magnitude, but al...

Two discrete hexadecavanadates, (n-Bu4N)4[V16O38(X)] (X = Cl(-) (1) and X = Br(-) (2)), were synthesized by a reaction of [V10O26](4-) with a template anion resulting in the incorporation of chloride or bromide in the {V16} spherical cluster framework. The reaction of [V10O26](4-) with p-toluenesulfonic acid proceeded under an aerobic environment to give 2 in the presence of an excess amount of...

Nitric oxide (NO) regulates a number of essential physiological processes by activating soluble guanylate cyclase (sGC) to produce the second messenger cGMP. The mechanism of NO sensing was previously thought to result exclusively from NO binding to the sGC heme; however, recent studies indicate that heme-bound NO only partially activates sGC and additional NO is involved in the mechanism of ma...

Soluble guanylyl cyclase (sGC) is a heterodimeric nitric oxide (NO) receptor that produces cyclic GMP. This signaling mechanism is a key component in the cardiovascular system. NO binds to heme in the β subunit and stimulates the catalytic conversion of GTP to cGMP several hundred fold. Several endogenous factors have been identified that modulate sGC function in vitro and in vivo. In previous ...

Thiols affect a variety of cell functions, an effect known as redox regulation. We show here that treatment (1-2 h) of cells with 0.1-5 mM N-acetyl-L-cysteine (NAC) increases surface protein thiol expression in human peripheral blood mononuclear cells. This effect is not associated with changes in cellular glutathione (GSH) and is also observed with a non-GSH precursor thiol N-acetyl-D-cysteine...

MicroRNAs (miRNAs) are believed to be important for cancer diagnosis and prognosis, serving as reliable molecular biomarkers. In this work, we presented a label-free and highly sensitive electrochemical genosensor for miRNAs detection with the triple signal amplification of gold nanoparticles (AuNPs), alkaline phosphatase (ALP) and p-aminophenol (p-AP) redox cycling. The label-free strategy is ...