title: The effects of arg-vasopressin on osteoblast-like cells in endothelial nitric oxide synthase-knockout mice and their wild type counterparts.
abstract: In the present study, we investigated whether nitric oxide (NO) could be involved in the effects of arg-vasopressin (AVP) on osteoblast-like cells. Cells derived from endothelial nitric oxide synthase (eNOS)-knockout mice and their wild type (WT) counterparts, and an osteosarcoma cell line (SaOS-2) were used. AVP (10-100 pmol/l) increased proliferation of osteoblast-like cells from WT mice. The effect was abolished by an AVP V1-receptor antagonist. AVP increased proliferation of cells from eNOSKO mice only when a NO donor, SNAP, was added. A nitric oxide synthase-inhibitor, L-NAME, antagonized the increase in cell proliferation in response to AVP in SaOS-2 cells. In conclusion, this study indicates that NO is involved in the effects of AVP on cell proliferation in osteoblast-like cells.
authors.affiliation: Department of Molecular Medicine, Endocrine and Diabetes Unit, Karolinska Institutet and Karolinska University Hospital, S-17176 Stockholm, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Lagumdzija
authors.forename: Y
authors.initials: Y
authors.lastname: Pernow
authors.forename: E
authors.initials: E
authors.lastname: Bucht
authors.forename: A
authors.initials: A
authors.lastname: Gonon
authors.forename: M
authors.initials: M
authors.lastname: Petersson
mesh_terms: D000818:Animals; D001127:Arginine Vasopressin / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D001854:Bone Marrow Cells / Q000166:cytology; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D005838:Genotype; D006801:Humans; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D019331:NG-Nitroarginine Methyl Ester / Q000494:pharmacology; D052250:Nitric Oxide Synthase Type III / Q000235:genetics* / Q000378:metabolism; D010006:Osteoblasts / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D015675:Osteocalcin / Q000378:metabolism; D026423:S-Nitroso-N-Acetylpenicillamine / Q000494:pharmacology; D017154:Stromal Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism
chemical_list: D015675:Osteocalcin; D001127:Arginine Vasopressin; D026423:S-Nitroso-N-Acetylpenicillamine; D052250:Nitric Oxide Synthase Type III; D019331:NG-Nitroarginine Methyl Ester