What does hyaluronidase mean?
Hyaluronidase is an enzyme that breaks down hyaluronic acid, a long-chain carbohydrate found throughout connective tissues, joints, and the fluid inside the eye. The enzyme cleaves the repeating sugar links in hyaluronic acid, reducing the viscosity of gels and allowing fluids to spread more readily through tissue. This property makes it useful in medicine: it can facilitate the dispersion and absorption of injected drugs and is used in some injections intended for subcutaneous or intramuscular administration. Hyaluronidase also occurs naturally in human tissues and is studied in connection with tissue organization, inflammation, fertility, and certain inherited disorders. Outside specialist contexts, the name most often denotes a pharmaceutical preparation rather than the native enzyme. Although its name closely resembles that of hyaluronic acid, the two are not interchangeable: one is a catalyst that decomposes the other. The word belongs primarily to scientific and medical vocabulary, but it is also useful for understanding how enzymes can selectively dismantle complex biological materials.
nounAn enzyme that breaks down hyaluronic acid and hyaluronan by cleaving their repeating sugar chains. Preparations of the enzyme are used medically to modify tissue viscosity, facilitate the dispersion of injected fluids, and assist absorption of certain injected drugs.
- An enzyme that hydrolyzes hyaluronic acid and related glycosaminoglycans.
"The clinician administered hyaluronidase to help the injected medication disperse through the tissue."
"Researchers measured hyaluronidase activity in samples collected during the experiment."
"Hyaluronidase is sometimes used to facilitate the spread and absorption of an injected preparation."
The plural is rarely needed; hyaluronidase is usually treated as an uncountable scientific or pharmaceutical term.
"The laboratory compared the activities of two different hyaluronidases."
Hyaluronidase acts like molecular scissors on one of the body’s most water-loving molecules, making thick, gel-like tissue more fluid when treatment requires it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does hyaluronidase come from?
The word is formed from “hyaluronic” and the suffix “-idase,” which is used in forming names for enzymes that cause the breakdown of a particular substance. “Hyaluronic” itself combines an element based on Greek hýalos, meaning “glass,” with material associated with uric acid, reflecting the substance’s initial association with a glassy appearance. The resulting compound name entered scientific use in the early 20th century as knowledge of the enzyme responsible for breaking down hyaluronic acid developed.
How hyaluronidase is actually used
The term is used chiefly in biochemistry, pharmacology, and clinical medicine. In therapeutic contexts it usually refers to a purified enzyme preparation, while in laboratory contexts it may refer to the enzyme itself. It should not be confused with hyaluronic acid, its substrate.
Easily confused with hyaluronidase
Hyaluronidase is the enzyme that decomposes hyaluronic acid, whereas hyaluronic acid is the substance being broken down.