Purification of hyaluronidase from human placenta

Area of Science:

• Biochemistry
• Enzymology
• Human Placental Biology

Background:

• Hyaluronidase is an enzyme crucial for the degradation of hyaluronic acid.
• Understanding the properties of human hyaluronidase is important for various biological and medical applications.

Purpose of the Study:

• To isolate and purify hyaluronidase from human placenta.
• To characterize the biochemical and physical properties of the purified enzyme.
• To assess the biological diffusing activity of human placental hyaluronidase.

Main Methods:

• Enzyme isolation and purification using ammonium sulfate fractionation, DEAE-cellulose chromatography, and Sephadex G-150 gel filtration.
• Determination of isoelectric point and molecular weight (via gel filtration).
• Enzyme activity assays at varying temperatures and pH, Michaelis-Menten kinetics determination, and in vivo diffusion assay in rabbits.

Main Results:

• Purified human hyaluronidase exhibited an isoelectric point of pH 5.2 and a molecular weight of 7 x 10^4 Da.
• The enzyme was stable below 30°C, with optimal activity at pH 3.9, characteristic of lysosomal hyaluronidase.
• Significant diffusing activity was observed upon intracutaneous injection in rabbits.

Conclusions:

• Human placental hyaluronidase has been successfully isolated and purified.
• The characterized properties align with known lysosomal hyaluronidases.
• The enzyme's demonstrated biological diffusing activity suggests its potential utility in enhancing substance diffusion in biological tissues.