Biology of hyaluronan: Insights from genetic disorders of hyaluronan metabolism

• 作者: Barbara Triggs-Raine Marvin R Natowicz
• 来源期刊: 世界生物化学杂志：英文版（电子版）
• 学科: 医学
• 关键词: HYALURONIDASE HYALURONAN HYALURONIDASE 1 MUCOPOLYSACCHARIDOSIS HYALURONIDASE 2 HYALURONAN SYNTHASE 2
• 年，卷（期）: 2015,（3）
• 页码范围: 110-120
• 页数: 11页
• 分类号: R596

摘要

Hyaluronan is a rapidly turned over component of the vertebrate extracellular matrix. Its levels are determined, in part, by the hyaluronan synthases, HAS1, HAS2, and HAS3, and three hyaluronidases, HYAL1, HYAL2 and HYAL3. Hyaluronan binding proteins also regulate hyaluronan levels although their involvement is less well understood. To date, two genetic disorders of hyaluronan metabolism have been reported in humans: HYAL1 deficiency(Mucopolysaccharidosis IX) in four individuals with joint pathology as the predominant phenotypic finding and HAS2 deficiency in a single person having cardiac pathology. However, inherited disorders and induced mutations affecting hyaluronan metabolism have been characterized in other species. Overproduction of hyaluronan by HAS2 results in skin folding and thickening in shar-pei dogs and the naked mole rat, whereas a complete deficiency of HAS2 causes embryonic lethality in mice due to cardiac defects. Deficiencies of murine HAS1 and HAS3 result in a predisposition to seizures. Like humans, mice with HYAL1 deficiency exhibit joint pathology. Mice lacking HYAL2 have variably penetrant developmental defects, including skeletal and cardiac anomalies. Thus, based on mutant animal models, a partial deficiency of HAS2 or HYAL2 might be compatible with survival in humans, while complete deficiencies of HAS1, HAS3, and HYAL3 may yet be recognized.