Bioscreening of marine organisms from the coasts of Pakistan

This review article covers the literature on bioscreening of crude extracts,fractions and pure compounds isolated from various marine organisms including seaweeds,mangroves,invertebrates and bacteria collected from the coasts of karachi (pakistan) published during the period 1984-2010. recent studies showed that a number of novel compounds have been isolated from marine organisms possessing interesting biological activities. various research groups from pakistan have conducted the extensive bioassay-guided investigation of chemical constituents of marine organisms which showed anti-bacterial,anti-fungal,nematicidal,anti-inflammatory,antileishmanial,anti-coagulation,cytotoxicity,enzyme inhibition,inhibition of edema,anti-cancer,brine shrimp lethality,lemna minor bioassay,phytotoxicity,spasmolytic,analgesic and hypolipidemic activities. more than 70 marine organisms have been reported with reference to their biological studies and about 100 pure compounds were isolated from these organisms but only 18 compounds (1-18) and 5 synthetic analogues (1a-1e) of compound 1 were found active. this review article is particularly focused only on the reported bioactive compounds and crude extracts of marine organisms.