A new TLC separation and quantitation method for L-tyrosine and L-Dopa mixtures was developed. The minimum tyrosine and Dopa quantities which can be measured by this technique are 0.7 and 1.5 μg respectively. The method may be used to measure the kinetic parameters of polyphenoloxidase as well as to trace the enzyme catalyzed conversion of L-tyrosine into L-Dopa. For a set of 20 measurements th...

Marcus Ware, MD, PhD (Tulane-Ochsner) Interaction of 4-Demethyl-cholesteryloxycarbonylpenclomedine (DM-CHOC-PEN) with Melanoma Melanin Metabolism and Cell Death Andrew Conger, MD (LSUHSC-NO) Pineoblastoma in Adults Rimal Hanif, MD (LSUHSC-S) The Kurdistan Experience: Building Neurosurgical Capacity in a Medically Underdeveloped Region Scientific Session I Moderator: Dr. Bharat Guthikonda Intera...

A robust biodegradable hydrogel is constructed from two components containing G4.0 PAMAM and DOPA, which displays excellent interconnected porous 3D networks, higher mechanical strength, low and stable swelling and good biocompatibility. A mouse CSD model in vivo evidences that moderate bone-like tissue and extensive bony tissue are observed when the hydrogel is implanted.

The moncamine-oxidase inhibitors (MAOI's) were introduced into therapeutics in 1957 and despite numerous toxic effects are in widespread use today.* The bulk of these drugs are employed by psychiatrists for the hospital and office treatment of depression. However, they also find a use in cardiology in the management of angina pectoris and hypertension. All the MAOI's possess in common the abili...

It has been well known that 3-O-methyldopa (3-OMD) is a metabolite of L-3,4-dihydroxyphenylalanine (L-DOPA) formed by catechol O-methyltransferase (COMT), and 3-OMD blood level often reaches higher than physiological level in Parkinson's disease (PD) patients receiving long term L-DOPA therapy. However, the physiological role of 3-OMD has not been well understood. Therefore, in order to clarify...

Methyl-L-DOPA, an antihypertensive agent, has significant in vitro activity against a variety of atypical mycobacteria such as the Mycobacterium avium complex, M. scrofulaceum, M. xenopi and M. marinum, and rare pathogens like M. fortuitum. In the present investigation, the screening of the in vitro activity was further extended by testing the in vitro activity against a total of 53 different s...

The link between the anti-Parkinsonian drug L-3,4-dihydroxyphenylalanine (L-DOPA) and the serotonergic (5-HT) system has been long established and has received increased attention during the last decade. Most studies have focused on the fact that L-DOPA can be transformed into dopamine (DA) and released from 5-HT terminals, which is especially important for the management of L-DOPA-induced dysk...

We report a facile green approach to the synthesis of silver nanoparticles (Ag NPs) on the surface of graphene oxide nanosheets functionalized with mussel-inspired dopamine (GO-Dopa) without additional reductants or stabilizers at room temperature. The resulting hybrid Ag/GO-Dopa exhibits good dispersity and excellent catalytic activity in the reduction of nitroarenes.