Norepinephrine activates β -adrenergic receptors at the inner nuclear membrane in astrocytes.

Norepinephrine exerts powerful influences on the metabolic, neuroprotective and immunoregulatory functions of astrocytes. Until recently, all effects of norepinephrine were believed to be mediated by receptors localized exclusively to the plasma membrane. However, recent studies in cardiomyocytes have identified adrenergic receptors localized to intracellular membranes, including Golgi and inner nuclear membranes, and have shown that norepinephrine can access these receptors via transporter-mediated uptake.

Pancreaticopleural Fistula: A Rare Complication of Alcoholic Pancreatitis.

Pancreaticopleural fistula (PPF) is an uncommon complication of chronic pancreatitis. The authors describe a case of a 41-year-old male with a history of chronic alcoholic pancreatitis and pancreatic pseudocyst who presented with dyspnea and right-sided chest pain for three days. A chest radiograph showed near-complete opacification of the right hemithorax.

Modeling of S-Nitrosothiol-Thiol Reactions of Biological Significance: HNO Production by S-Thiolation Requires a Proton Shuttle and Stabilization of Polar Intermediates.

Nitroxyl (HNO), a reduced form of the important gasotransmitter nitric oxide, exhibits its own unique biological activity. A possible biological pathway of HNO formation is the S-thiolation reaction between thiols and S-nitrosothiols (RSNOs). Our density functional theory (DFT) calculations suggested that S-thiolation proceeds through a proton transfer from the thiol to the RSNO nitrogen atom, which increases electrophilicity of the RSNO sulfur, followed by nucleophilic attack by thiol, yielding a charge-separated zwitterionic intermediate structure RSS (R)N(H)O (Zi), which decomposes to yield HNO and disulfide RSSR.