title: HYAL1 hyaluronidase in prostate cancer: a tumor promoter and suppressor.
abstract: Hyaluronidases degrade hyaluronic acid, which promotes metastasis. HYAL1 type hyaluronidase is an independent prognostic indicator of prostate cancer progression and a biomarker for bladder cancer. However, it is controversial whether hyaluronidase (e.g., HYAL1) functions as a tumor promoter or as a suppressor. We stably transfected prostate cancer cells, DU145 and PC-3 ML, with HYAL1-sense (HYAL1-S), HYAL1-antisense (HYAL1-AS), or vector DNA. HYAL1-AS transfectants were not generated for PC-3 ML because it expresses little HYAL1. HYAL1-S transfectants produced < or = 42 milliunits (moderate overproducers) or > or = 80 milliunits hyaluronidase activity (high producers). HYAL1-AS transfectants produced <10% hyaluronidase activity when compared with vector transfectants (18-24 milliunits). Both blocking HYAL1 expression and high HYAL1 production resulted in a 4- to 5-fold decrease in prostate cancer cell proliferation. HYAL1-AS transfectants had a G2-M block due to decreased cyclin B1, cdc25c, and cdc2/p34 expression and cdc2/p34 kinase activity. High HYAL1 producers had a 3-fold increase in apoptotic activity and mitochondrial depolarization when compared with vector transfectants and expressed activated proapoptotic protein WOX1. Blocking HYAL1 expression inhibited tumor growth by 4- to 7-fold, whereas high HYAL1 producing transfectants either did not form tumors (DU145) or grew 3.5-fold slower (PC-3 ML). Whereas vector and moderate HYAL1 producers generated muscle and blood vessel infiltrating tumors, HYAL1-AS tumors were benign and contained smaller capillaries. Specimens of high HYAL1 producers were 99% free of tumor cells. This study shows that, depending on the concentration, HYAL1 functions as a tumor promoter and as a suppressor and provides a basis for anti-hyaluronidase and high-hyaluronidase treatments for cancer.
authors.affiliation: Department of Urology, Miller School of Medicine, University of Miami, Miami, Florida 33101, USA. vlokeshw@med.miami.edu
authors.forename: Vinata B
authors.initials: VB
authors.lastname: Lokeshwar
authors.forename: Wolfgang H
authors.initials: WH
authors.lastname: Cerwinka
authors.forename: Tadahiro
authors.initials: T
authors.lastname: Isoyama
authors.forename: Bal L
authors.initials: BL
authors.lastname: Lokeshwar
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000502:physiology; D002453:Cell Cycle / Q000502:physiology; D048708:Cell Growth Processes / Q000502:physiology; D045744:Cell Line, Tumor; D016373:DNA, Antisense / Q000235:genetics; D006801:Humans; D006820:Hyaluronic Acid / Q000096:biosynthesis; D006821:Hyaluronoglucosaminidase / Q000096:biosynthesis / Q000235:genetics / Q000502:physiology*; D007527:Isoenzymes; D008297:Male; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D009389:Neovascularization, Pathologic / Q000201:enzymology; D011471:Prostatic Neoplasms / Q000098:blood supply / Q000201:enzymology* / Q000235:genetics / Q000473:pathology; D014162:Transfection; D014183:Transplantation, Heterologous
chemical_list: D016373:DNA, Antisense; D007527:Isoenzymes; D006820:Hyaluronic Acid; D006821:Hyaluronoglucosaminidase