A microtiter-based assay for hyaluronidase activity not requiring specialized reagents

Anal Biochem. 1997 Sep 5;251(2):263-9. doi: 10.1006/abio.1997.2262.

Abstract

A sensitive, rapid microtiter-based assay for hyaluronidase activity is described that does not require highly specialized biological reagents, as required heretofore. The free carboxyl groups of hyaluronan are biotinylated in a one-step reaction using biotin-hydrazide. This substrate is then covalently coupled to a 96-well microtiter plate. At the completion of the enzyme reaction, residual substrate is detected with an avidin-peroxidase reaction that can be read in a standard ELISA plate reader. Because the substrate is covalently bound to the microtiter plate, artifacts such as pH-dependent displacement of the biotinylated substrate do not occur. The sensitivity permits rapid measurement of hyaluronidase activity from cultured cells and biological samples with an interassay variation of less than 5%. Using this new assay, we measured the distribution profile of plasma hyaluronidase levels in normal human sera. A 1-microl sample of plasma was sufficient for assays in triplicate. Hyaluronidase activity in human foreskin primary keratinocyte cultures was also quantitated. A 25-fold increase in hyaluronidase activity was observed in keratinocyte cultures induced to differentiate in high calcium (1.5 mM), compared to levels in low calcium (0.05 mM) media. The microtiter-based assay may be used as a routine clinical laboratory procedure.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Biotin / metabolism
  • Calcium / metabolism
  • Cells, Cultured
  • Enzyme-Linked Immunosorbent Assay
  • Humans
  • Hyaluronoglucosaminidase / analysis*
  • Hyaluronoglucosaminidase / blood
  • Hydrogen-Ion Concentration
  • Indicators and Reagents
  • Keratinocytes / chemistry
  • Keratinocytes / metabolism
  • Microchemistry
  • Recombinant Proteins / metabolism

Substances

  • Indicators and Reagents
  • Recombinant Proteins
  • Biotin
  • Hyaluronoglucosaminidase
  • Calcium