Amaryllidaceae occupies a prominent position among the most important alkaloid-rich plant families in globe. Plants of this family show an exceptional ability to produce myriad structurally diverse alkaloids with noteworthy pharmacological and therapeutic potential. Of these alkaloids, narciprimine is rare weakly basic phenanthridone alkaloid that was identified from some species belonging gene...

The kinetic characteristic (Km) of cholinesterase from the crab Chasmagnathus granulata, the shrimp Farfantepenaeus paulensis and the fish Odontesthes bonaeriensis were compared and correlated with the anticholinesterasic effect of eserine (physostigmine). For the crustaceans, the estimated Km values were about 5-8 times higher than that estimated for the fish (0.04 mM). In the crab and the shr...

The perivascular spaces (PVSs) of the brain are lined with pia and contain interstitial fluid. In general, PVSs are small, asymptomatic, and identifiable at all ages. When PVSs are significantly enlarged, they can produce various clinical manifestations such as headache and dizziness. A 67-year-old man was admitted with cognitive impairment and gait disturbance with a 5-month history. Brain MRI...

SUGAMMADEX IS BELONGING TO A NEW CLASS OF DRUGS the selective relaxant binding agents. Sugammadex can reverse residual paralysis by encapsulating free circulating non depolarizing muscle relaxants. The mains advantages of sugammadex when compared with conventional anticholinesterase agents are a much faster recovery time and the unique ability, for the first time, to reverse rapidly and efficie...

Myasthenia gravis (MG) is an autoimmune disorder characterized by autoantibodies against acetylcholine receptors. MG is generally an isolated disorder but may occur concomitantly with other autoimmune diseases. We describe an eighteen-year-old girl with MG who was admitted to our clinic with secondary amenorrhea and diagnosed as autoimmune oophoritis. Since her myasthenic symptoms did not resol...

The significance of new findings in two areas will be discussed with respect to the design of inhibitors of acetylcholinesterase. One area is that of enzyme structure, including the oligomeric form and the existence of allosteric binding sites, of isozymes and of a mutant enzyme. The other area is that of the forces which bind inhibitors to the enzyme prior to reacting with it, including ionic,...