The present invention relates generally to the development of pharmaceutical compositions which provide for sustained release of biologically active polypeptides. More specifically, the invention relates to the use of thermosensitive, biodegradable hydrogels, consisting of a block copolymer of poly(d,l- or l-lactic acid)(PLA) or poly(lactide-co-glycolide)(PLGA) and polyethylene glycol (PEG), for the sustained delivery of biologically active agents, such as leptin.

A invenção atual relaciona-se geralmente ao desenvolvimento das composições pharmaceutical que fornecem para a liberação sustentada de polypeptides biològica ativos. Mais especificamente, a invenção relaciona-se ao uso dos hydrogels thermosensitive, biodegradable, consistindo em um copolymer do bloco do poly(d, l ou acid)(PLA) l-l-lactic ou poly(lactide-poly(lactide-co-glycolide)(PLGA)-glycolide)(PLGA) e glicol de polietileno (PEG), para a entrega sustentada de agentes biològica ativos, tais como o leptin.

 
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