The invention concerns the esters of hyaluronic acid in which all or only a portion of the carboxylic groups of the acid are esterified, and the salts of the partial esters with metals or with pharmacologically acceptable organic bases.
The compounds possess interesting and precious bio- plastic and pharmaceutical properties and may be used in innumerable fields, including cosmetics, surgery and medicine. The invention also includes pharmaceutical preparations containing, as an active ingredient, one or more hyaluronic acid esters, or a salt thereof as described above, as well as medicaments containing:
1) a pharmacologically active substance or an association of pharmacologically active substances and
2) a carrying vehicle containing a total or partial ester of hyaluronic acid.
The invention includes also various uses of the hyaluronic esters or of the above mentioned medicaments, such as in medicine, surgery or cosmetics.
The invention also relates to a new procedure for the preparation of polysaccharide esters containing carboxylic groups, such as in particular the above mentioned hayluronic acid esters.
本发明涉及全部或仅部分羧基被酯化的透明质酸酯,以及部分酯与
金属或药理学上可接受的有机碱的盐。
这些化合物具有有趣而珍贵的
生物塑料和药物特性,可用于无数领域,包括化妆品、外科手术和医药。本发明还包括含有一种或多种透明质酸酯或其上述盐类作为活性成分的药物制剂,以及含有以下成分的药品:
1) 一种药理活性物质或药理活性物质的组合,以及
2) 含有全部或部分透明质酸酯的载体。
本发明还包括透明质酸酯或上述药剂的各种用途,如医药、外科手术或化妆品。
本发明还涉及一种制备含有羧基的
多糖酯的新工艺,特别是上述
海藻糖酸酯。