However, the chemical constituents and mechanism(s) responsible for the activity remain to be investigated. The ethanolic extracts of P. acuminata possess antinociceptive activity and the mode of action might involve a peripheral mechanism SCH 900776 mw of pain inhibition. This provides a rationale for the use of the plant in painful and inflammatory conditions in folk medicine. Further pharmacological investigation through bioactivity guided phytochemical analysis is required to find out the active

constituents responsible for antinociceptive action. All authors have none to declare. “
“Schizophrenia, characterized by profound disruptions in thinking, and it affects language, perception, and a sense of self is a severe disorder that affects around 24 million people worldwide, and it typically this website begins in late adolescence or early adulthood. Classical

(typical) neuroleptics such as haloperidol are currently used to treat this disease, but their use is associated with severe mechanism-related side effects including the induction of acute extrapyramidal symptoms (EPS).1 Also, these compounds are ineffective against the negative symptoms of schizophrenia. Four decades after introduction of clozapine it remains the prototype for atypical antipsychotic drugs.2 Its reintroduction for use in cases of treatment-resistant schizophrenia gave rise to a new group of atypical or non-classical antipsychotics that have no EPS at therapeutic doses and are also effective against schizophrenia’s negative symptoms.3, 4 and 5 Clozapine is associated with serious side effects such as orthostatic hypotension, sedation, sialorrhea (excessive

salivation), constipation, and weight gain.6 and 7 Agonists at 5-HT2A receptor may be used for treatment of sleep disorders and arousal. The utility of much antagonists in the treatment of depression and certain psychotic conditions has already been well explored. The investigation of 5-HT2A antagonists as potential drug-abuse therapeutics is topical in the recent literature.8 and 9 Quetiapine,6, 10 and 11 an atypical antipsychotic agent can successfully treat the cognitive, depressive, and aggressive symptoms in the context of schizophrenia.12 Based on some points related with the metabolism of quetiapine it is thought that if the steric bulk on piperazinyl nitrogen is increased it may give better duration of action and also the dose can be minimized. In our previous studies we have reported the dibenzothiazepine derivatives with substituted piperazine as a substituent at C-11 position.13 In present study we have synthesized ten derivatives with methylene bridge based on docking scores and evaluated for antipsychotic potential. All chemical reagents and solvents were provided from Merck. The general procedures for the synthesis of 11-(4-(substituted benzyl)-piperazin-1-yl dibenzo [b, f] [1, 4] thiazepine (SSP1-10) is illustrated in Scheme 1.