title: Small molecules with potent osteogenic-inducing activity in osteoblast cells.
abstract: A chemical screen of 45,000 compounds from a diverse collection led to the identification of two series of small molecules with potent osteogenic activity in mouse MC3T3-E1 osteoblast cells. The first chemical group was characterized by an amino benzothiazole core (AMG0892 series) and the second group by a naphthyl amide core (AMG0309 series). Using alkaline phosphatase (ALP), osteocalcin (OCL) and calcium as markers of osteoblast differentiation and mineralization, both chemical series showed EC(50)s in the 0.01-0.2 microM range and were consistent for all three markers. Compounds inhibited cell proliferation, had no effect on apoptosis and showed evidence for CREB pathway activity. The present compounds represent some of the most potent osteogenic small molecules reported to date and provide new tools for elucidating signaling mechanisms in osteoblasts.
authors.affiliation: Department of Metabolic Disorders, Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA 91320, USA.
authors.forename: Chun-Ya E
authors.initials: CY
authors.lastname: Han
authors.forename: Youping
authors.initials: Y
authors.lastname: Wang
authors.forename: Longchuan
authors.initials: L
authors.lastname: Yu
authors.forename: David
authors.initials: D
authors.lastname: Powers
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Xiong
authors.forename: Violeta
authors.initials: V
authors.lastname: Yu
authors.forename: Yen
authors.initials: Y
authors.lastname: Nguyen
authors.forename: David J St
authors.initials: DJ
authors.lastname: Jean
authors.forename: Philip
authors.initials: P
authors.lastname: Babij
mesh_terms: D016475:3T3 Cells; D045930:Anabolic Agents / Q000737:chemistry / Q000494:pharmacology; D000818:Animals; D052160:Benzothiazoles / Q000737:chemistry* / Q000494:pharmacology; D002454:Cell Differentiation / Q000187:drug effects / Q000502:physiology; D049109:Cell Proliferation / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D051379:Mice; D008809:Mice, Inbred C3H; D010006:Osteoblasts / Q000166:cytology* / Q000187:drug effects / Q000502:physiology*; D010012:Osteogenesis / Q000187:drug effects / Q000502:physiology*; D013329:Structure-Activity Relationship
chemical_list: D045930:Anabolic Agents; D052160:Benzothiazoles