Biologically-active compositions extracted from dictyotales plant family

A biologically-active composition to stimulate synthesis of glycosylated elements of extracellular matrix of an animal or human tissues, containing as the active ingredient at least one biologically active substance extracted from plants of the family of Dictyotales which are defined by the following analytical data:

• retention times by semi-preparative high performance liquid chromatography on a diol grafted silica support and with an eluent of hexane/isopropanol in the ratio 92:8 ranging from 20 to 25 minutes and from 35 to 40 min;
• a retention time by semi-preparative high performance liquid chromatography on the C.sub.18 grafted silica support and with an eluent of acetonitrile/water in the ratio 85:15, ranging from 15 to 17 minutes;
• retention times by semi-preparative high performance liquid chromatography on the C.sub.18 grafted silica support and with an eluent of acetonitrile/water/acetic acid in the volume volume ratio 85:15:0.05 ranging from 17 to 20 minutes and 30 to 40 minutes;
• a retention time by high pressure chromatography on a column filled with normal silica and with an eluent of heptane/ether (90:10) ranging from 6.9 minutes to 8.5 minutes;
• a retention time by high performance liquid chromatography fitted with C.sub.18 grafted silica column using an eluent made of methanol/water 80/20, ranging from 16 to 18 minutes;
• and
• a pharmaceutically acceptable carrier or excipient.