title: Arg-vasopressin increases proliferation of human osteoblast-like cells and decreases production of interleukin-6 and macrophage colony-stimulating factor.
abstract: Patients with arginine-vasopressin (AVP) deficiency have been reported to have a decreased bone mass. The mechanism behind this is not known. In this study, the effects of AVP on primary human osteoblast-like (hOB) cells and SaOS-2 cells were investigated. Cell proliferation was measured by [3H]thymidine incorporation or a commercially available kit (EZ4U), and protein synthesis by [3H]proline incorporation. In addition, the production of interleukin-6 (IL-6) and macrophage colony-stimulating factor (M-CSF) in hOB cells was determined. AVP at 10-100 pmol/l increased cell proliferation in hOB and SaOS-2 cells (p < 0.05). Protein synthesis increased in SaOS-2 cells incubated with 10-100 pmol/l AVP (p < 0.01). When hOB and SaOS-2 cells were incubated with AVP together with a vasopressin receptor-1 (V1)-antagonist ([beta-Mercapto-beta,beta-cyclopenta-methylenepropionyl1,O-Me-Tyr2,Arg8]-vasopressin) or a protein kinase C (PKC)-inhibitor (chelerythrine) the increase in cell proliferation in response to AVP was abolished. The production of IL-6 and M-CSF was decreased in hOB-cells incubated with 10 pmol/l AVP (p < 0.01). In addition, by RT-PCR, we found evidence for expression of mRNA for the vasopressin 1a (V1a)-receptor in hOB cells. In conclusion, AVP stimulated proliferation of hOB- and SaOS-2 cells. We suggest that the effect was mediated through the V1-receptor. Additionally, AVP decreased production of IL-6 and M-CSF from the hOB cells. Moreover, the V1a-receptor seems to be expressed in hOB cells.
authors.affiliation: Department of Molecular Medicine, Endocrine and Diabetes Unit, Karolinska Institutet/Hospital, S-171 76 Stockholm, Sweden.
authors.forename: Alena
authors.initials: A
authors.lastname: Lagumdzija
authors.forename: Elisabet
authors.initials: E
authors.lastname: Bucht
authors.forename: André
authors.initials: A
authors.lastname: Stark
authors.forename: Anna-Lena
authors.initials: AL
authors.lastname: Hulting
authors.forename: Maria
authors.initials: M
authors.lastname: Petersson
mesh_terms: D000470:Alkaloids; D065092:Antidiuretic Hormone Receptor Antagonists; D001127:Arginine Vasopressin / Q000235:genetics / Q000494:pharmacology*; D053119:Benzophenanthridines; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D002867:Chromones / Q000494:pharmacology; D006801:Humans; D007213:Indomethacin / Q000494:pharmacology; D015850:Interleukin-6 / Q000096:biosynthesis*; D016173:Macrophage Colony-Stimulating Factor / Q000096:biosynthesis*; D009025:Morpholines / Q000494:pharmacology; D010006:Osteoblasts / Q000166:cytology* / Q000187:drug effects* / Q000378:metabolism; D010617:Phenanthridines / Q000494:pharmacology; D014176:Protein Biosynthesis / Q000187:drug effects; D012333:RNA, Messenger / Q000378:metabolism; D017483:Receptors, Vasopressin / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D000470:Alkaloids; D065092:Antidiuretic Hormone Receptor Antagonists; D053119:Benzophenanthridines; D002867:Chromones; D015850:Interleukin-6; D009025:Morpholines; D010617:Phenanthridines; D012333:RNA, Messenger; D017483:Receptors, Vasopressin; D001127:Arginine Vasopressin; C085911:2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one; D016173:Macrophage Colony-Stimulating Factor; C016299:chelerythrine; D007213:Indomethacin