title: Biological pathways and in vivo antitumor activity induced by Atiprimod in myeloma.
abstract: Atiprimod (Atip) is a novel oral agent with anti-inflammatory properties. Although its in vitro activity and effects on signaling in multiple myeloma (MM) have been previously reported, here we investigated its molecular and in vivo effects in MM. Gene expression analysis of MM cells identified downregulation of genes involved in adhesion, cell-signaling, cell cycle and bone morphogenetic protein (BMP) pathways and upregulation of genes implicated in apoptosis and bone development, following Atip treatment. The pathway analysis identified integrin, TGF-beta and FGF signaling as well as Wnt/beta-catenin, IGF1 and cell-cycle regulation networks as being most modulated by Atip treatment. We further evaluated its in vivo activity in three mouse models. The subcutaneous model confirmed its in vivo activity and established its dose; the SCID-hu model using INA-6 cells, confirmed its ability to overcome the protective effects of BM milieu; and the SCID-hu model using primary MM cells reconfirmed its activity in a model closest to human disease. Finally, we observed reduced number of osteoclasts and modulation of genes related to BMP pathways. Taken together, these data demonstrate the in vitro and in vivo antitumor activity of Atip, delineate potential molecular targets triggered by this agent, and provide a preclinical rational for its clinical evaluation in MM.
authors: Jerome Lipper Multiple Myeloma Center, Department of Adult Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.
authors: P
authors: P
authors: Neri
authors: P
authors: P
authors: Tassone
authors: M
authors: M
authors: Shammas
authors: H
authors: H
authors: Yasui
authors: E
authors: E
authors: Schipani
authors: R B
authors: RB
authors: Batchu
authors: S
authors: S
authors: Blotta
authors: R
authors: R
authors: Prabhala
authors: L
authors: L
authors: Catley
authors: M
authors: M
authors: Hamasaki
authors: T
authors: T
authors: Hideshima
authors: D
authors: D
authors: Chauhan
authors: G S
authors: GS
authors: Jacob
authors: D
authors: D
authors: Picker
authors: S
authors: S
authors: Venuta
authors: K C
authors: KC
authors: Anderson
authors: N C
authors: NC
authors: Munshi
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology / Q000627:therapeutic use; D000970:Antineoplastic Agents / Q000494:pharmacology* / Q000627:therapeutic use; D017209:Apoptosis / Q000187:drug effects / Q000235:genetics; D001862:Bone Resorption / Q000188:drug therapy; D002448:Cell Adhesion / Q000187:drug effects / Q000235:genetics; D002453:Cell Cycle / Q000187:drug effects / Q000235:genetics; D045744:Cell Line, Tumor / Q000187:drug effects / Q000378:metabolism / Q000637:transplantation; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects*; D006801:Humans; D053858:Metabolic Networks and Pathways / Q000187:drug effects* / Q000235:genetics; D051379:Mice; D008819:Mice, Nude; D016513:Mice, SCID; D009101:Multiple Myeloma / Q000188:drug therapy* / Q000378:metabolism; D009363:Neoplasm Proteins / Q000096:biosynthesis / Q000235:genetics; D010012:Osteogenesis / Q000187:drug effects / Q000235:genetics; D015398:Signal Transduction / Q000187:drug effects; D013141:Spiro Compounds / Q000494:pharmacology* / Q000627:therapeutic use; D023041:Xenograft Model Antitumor Assays
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000970:Antineoplastic Agents; D009363:Neoplasm Proteins; D013141:Spiro Compounds; C099015:azaspirane