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Morelli F, Matis S, Benelli R, Salvini L, Zocchi MR, Poggi A. Antibody-Drug Conjugate Made of Zoledronic Acid and the Anti-CD30 Brentuximab-Vedotin Exert Anti-Lymphoma and Immunostimulating Effects. Cells 2024; 13:862. [PMID: 38786084 PMCID: PMC11119185 DOI: 10.3390/cells13100862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/06/2024] [Accepted: 05/11/2024] [Indexed: 05/25/2024] Open
Abstract
Relevant advances have been made in the management of relapsed/refractory (r/r) Hodgkin Lymphomas (HL) with the use of the anti-CD30 antibody-drug conjugate (ADC) brentuximab-vedotin (Bre-Ved). Unfortunately, most patients eventually progress despite the excellent response rates and tolerability. In this report, we describe an ADC composed of the aminobisphosphonate zoledronic acid (ZA) conjugated to Bre-Ved by binding the free amino groups of this antibody with the phosphoric group of ZA. Liquid chromatography-mass spectrometry, inductively coupled plasma-mass spectrometry, and matrix-assisted laser desorption ionization-mass spectrometry analyses confirmed the covalent linkage between the antibody and ZA. The novel ADC has been tested for its reactivity with the HL/CD30+ lymphoblastoid cell lines (KMH2, L428, L540, HS445, and RPMI6666), showing a better titration than native Bre-Ved. Once the HL-cells are entered, the ADC co-localizes with the lysosomal LAMP1 in the intracellular vesicles. Also, this ADC exerted a stronger anti-proliferative and pro-apoptotic (about one log fold) effect on HL-cell proliferation compared to the native antibody Bre-Ved. Eventually, Bre-Ved-ZA ADC, in contrast with the native antibody, can trigger the proliferation and activation of cytolytic activity of effector-memory Vδ2 T-lymphocytes against HL-cell lines. These findings may support the potential use of this ADC in the management of r/r HL.
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Affiliation(s)
- Feliciana Morelli
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy; (F.M.); (S.M.); (R.B.)
| | - Serena Matis
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy; (F.M.); (S.M.); (R.B.)
| | - Roberto Benelli
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy; (F.M.); (S.M.); (R.B.)
| | - Laura Salvini
- Fondazione Toscana Life Sciences, Technology Facilities and Mass Spectrometry Unit, 53100 Siena, Italy;
| | - Maria Raffaella Zocchi
- Division of Immunology, Transplants and Infectious Diseases, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy;
| | - Alessandro Poggi
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy; (F.M.); (S.M.); (R.B.)
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Zarone MR, Misso G, Grimaldi A, Zappavigna S, Russo M, Amler E, Di Martino MT, Amodio N, Tagliaferri P, Tassone P, Caraglia M. Evidence of novel miR-34a-based therapeutic approaches for multiple myeloma treatment. Sci Rep 2017; 7:17949. [PMID: 29263373 PMCID: PMC5738363 DOI: 10.1038/s41598-017-18186-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 12/01/2017] [Indexed: 02/07/2023] Open
Abstract
MiR-34a acts as tumor suppressor microRNA (miRNA) in several cancers, including multiple myeloma (MM), by controlling the expression of target proteins involved in cell cycle, differentiation and apoptosis. Here, we have investigated the combination between miR-34a and γ-secretase inhibitor (γSI), Sirtinol or zoledronic acid (ZOL) in order to enhance the inhibitory action of this miRNA on its canonical targets such as Notch1 and SIRT1, and on Ras/MAPK-dependent pathways. Our data demonstrate that miR-34a synthetic mimics significantly enhance the anti-tumor activity of all the above-mentioned anti-cancer agents in RPMI 8226 MM cells. We found that γSI enhanced miR-34a-dependent anti-tumor effects by activating the extrinsic apoptotic pathway which could overcome the cytoprotective autophagic mechanism. Moreover, the combination between miR-34a and γSI increased the cell surface calreticulin (CRT) expression, that is well known for triggering anti-tumor immunological response. The combination between miR-34a and Sirtinol induced the activation of an intrinsic apoptotic pathway along with increased surface expression of CRT. Regarding ZOL, we found a powerful growth inhibition after enforced miR-34a expression, which was not likely attributable to neither apoptosis nor autophagy modulation. Based on our data, the combination of miR-34a with other anti-cancer agents appears a promising anti-MM strategy deserving further investigation.
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Affiliation(s)
- Mayra Rachele Zarone
- Department of Biochemistry, Biophysics and General Pathology, University of Campania "L. Vanvitelli", Naples, Italy
| | - Gabriella Misso
- Department of Biochemistry, Biophysics and General Pathology, University of Campania "L. Vanvitelli", Naples, Italy
| | - Anna Grimaldi
- Department of Biochemistry, Biophysics and General Pathology, University of Campania "L. Vanvitelli", Naples, Italy
| | - Silvia Zappavigna
- Department of Biochemistry, Biophysics and General Pathology, University of Campania "L. Vanvitelli", Naples, Italy
| | - Margherita Russo
- Department of Biochemistry, Biophysics and General Pathology, University of Campania "L. Vanvitelli", Naples, Italy
| | - Evzen Amler
- Institute of Biophysics, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
- Laboratory of Tissue Engineering, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Maria Teresa Di Martino
- Department of Experimental and Clinical Medicine, Magna Graecia University, Salvatore Venuta University Campus, Catanzaro, Italy
| | - Nicola Amodio
- Department of Experimental and Clinical Medicine, Magna Graecia University, Salvatore Venuta University Campus, Catanzaro, Italy
| | - Pierosandro Tagliaferri
- Department of Experimental and Clinical Medicine, Magna Graecia University, Salvatore Venuta University Campus, Catanzaro, Italy
| | - Pierfrancesco Tassone
- Department of Experimental and Clinical Medicine, Magna Graecia University, Salvatore Venuta University Campus, Catanzaro, Italy
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania, USA
| | - Michele Caraglia
- Department of Biochemistry, Biophysics and General Pathology, University of Campania "L. Vanvitelli", Naples, Italy.
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania, USA.
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You Y, Li H, Chen J, Qin X, Ran Y. Zoledronic acid reverses cisplatin resistance in nasopharyngeal carcinoma cells by activating the mitochondrial apoptotic pathway. Oncol Lett 2017; 13:1840-1846. [PMID: 28454332 DOI: 10.3892/ol.2017.5611] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 09/09/2016] [Indexed: 11/05/2022] Open
Abstract
Despite improvements to radiotherapeutic strategies, resistance to adjuvant chemotherapy remains the main problem underlying the low 5-year survival rate in patients with nasopharyngeal carcinoma (NPC). In the present study, the human NPC cell line HNE1 was exposed to gradually increasing concentrations of cisplatin (CDDP) in order to establish a drug-resistant sub-cell line, HNE1/CDDP. HNE1/CDDP cells exhibited multidrug resistance and a prolonged doubling time, as compared with the parent HNE1 cells. Furthermore, pretreatment with zoledronic acid (ZOL) appeared to resensitize the CDDP-resistant cells by inducing S-phase cell cycle arrest and the mitochondrial apoptotic pathway by upregulating the expression of B-cell lymphoma-2 (BCL-2)-associated X protein and caspase-9 and downregulating the expression of BCL-2. The results of the present study suggested that HNE1/CDDP cells are a stable, multidrug-resistant NPC cell line that may serve as an important tool for research in drug resistance. In addition, the application of ZOL may hold clinical therapeutic potential for the treatment of drug resistance in NPC.
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Affiliation(s)
- Yanjie You
- Pathological Examination and Research Center, Luohe Medical College, Luohe, Henan 462002, P.R. China
| | - Haijun Li
- Department of Radiation Oncology, The Second People's Hospital of Neijiang, Neijiang, Sichuan 641000, P.R. China
| | - Jiongyu Chen
- Department of Laboratory, Cancer Hospital of Shantou University, Shantou, Guangdong 515041, P.R. China
| | - Xin Qin
- Medical College, Hubei University of Arts and Science, Xiangyang, Hubei 441053, P.R. China
| | - Yonggang Ran
- Department of Teaching and Training, Bethune Military Medical NCO Academy of PLA, Shijiazhuang, Hebei 050081, P.R. China
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Kato J, Futamura M, Kanematsu M, Gaowa S, Mori R, Tanahashi T, Matsuhashi N, Yoshida K. Combination therapy with zoledronic acid and cetuximab effectively suppresses growth of colorectal cancer cells regardless of KRAS status. Int J Cancer 2015; 138:1516-27. [PMID: 26437179 PMCID: PMC5057332 DOI: 10.1002/ijc.29881] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 09/07/2015] [Accepted: 09/25/2015] [Indexed: 12/29/2022]
Abstract
Targeted molecular therapy is an effective anticancer strategy. Anti‐EGFR monoclonal antibodies such as cetuximab (CTX) have been approved for the treatment of various malignancies, including colorectal cancer (CRC) with wild‐type KRAS. However, their efficacy in patients with KRAS mutations has not been established. Therefore, we investigated whether CTX treatment was effective as a single agent or in combination with zoledronic acid (ZOL) in human CRC cell lines with different KRAS status. CRC cell lines SW48 (wild‐type KRAS) and LS174T (mutant KRAS) were treated with ZOL, CTX and a combination of both drugs. Cytotoxicity was measured using the MTT assay. Changes in the levels of intracellular signaling proteins were evaluated using western blot analysis. Finally, we evaluated the efficacy of the combination treatment in an in vivo xenograft model. We observed that ZOL apparently inhibited growth in both cell lines, whereas CTX showed little effect. ZOL also increased the levels of unprenylated RAS. Combined ZOL and CTX treatment was synergistic in both cell lines and was associated with inhibition of the RAS‐MAPK and AKT‐mTOR signaling pathways. Furthermore, the combination treatment was more effective in suppressing the growth of xenografts derived from both SW48 and LS174T cells; this effect was associated with increased apoptosis. These results demonstrate that ZOL inhibits the growth of colon cancer cells regardless of KRAS status, and combination therapy using ZOL and CTX enhances this growth suppression. These findings suggest a novel strategy for the treatment of CRC independent of KRAS mutational status. What's new? A new combination therapy could be the one‐two punch that takes out treatment‐resistant colorectal cancer. The anti‐EGFR antibody cetuximab works well against colorectal cancer, but tumors with KRAS mutations can fend it off. Zoledronic acid, which can treat osteoporosis, also thwarts various types of cancer, and in this article the authors evaluated whether it could boost cetuximab's effectiveness. They showed that not only did zoledronic acid suppress colorectal tumor growth, even in KRAS mutants, but that the combination of both agents works better than either alone, both in cultured cell and in mice.
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Affiliation(s)
- Junko Kato
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Manabu Futamura
- Department of Breast and Molecular Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Masako Kanematsu
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Siqin Gaowa
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Ryutaro Mori
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Toshiyuki Tanahashi
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Nobuhisa Matsuhashi
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Kazuhiro Yoshida
- Department of Surgical Oncology, Graduate School of Medicine, Gifu University, Gifu, Japan
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Zekri J, Mansour M, Karim SM. The anti-tumour effects of zoledronic acid. J Bone Oncol 2014; 3:25-35. [PMID: 26909294 PMCID: PMC4723416 DOI: 10.1016/j.jbo.2013.12.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 12/16/2013] [Accepted: 12/19/2013] [Indexed: 11/20/2022] Open
Abstract
Bone is the most common site for metastasis in patients with solid tumours. Bisphosphonates are an effective treatment for preventing skeletal related events and preserving quality of life in these patients. Zoledronic acid (ZA) is the most potent osteoclast inhibitor and is licensed for the treatment of bone metastases. Clodronate and pamidronate are also licensed for this indication. In addition, ZA has been demonstrated to exhibit antitumour effect. Direct and indirect mechanisms of anti-tumour effect have been postulated and at many times proven. Evidence exists that ZA antitumour effect is mediated through inhibition of tumour cells proliferation, induction of apoptosis, synergistic/additive to inhibitory effect of cytotoxic agents, inhibition of angiogenesis, decrease tumour cells adhesion to bone, decrease tumour cells invasion and migration, disorganization of cell cytoskeleton and activation of specific cellular antitumour immune response. There is also clinical evidence from clinical trials that ZA improved long term survival outcome in cancer patients with and without bone metastases. In this review we highlight the preclinical and clinical studies investigating the antitumour effect of bisphosphonates with particular reference to ZA.
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Affiliation(s)
- Jamal Zekri
- AlFaisal University College of Medicine, PO Box 50927, Riyadh 11533, Saudi Arabia
- King Faisal Specilalist Hospital and Research Center, MBC J64, PO Box 40047, Jeddah 21499, Saudi Arabia
| | - Maged Mansour
- Jeddah Cancer Centre, Dr. Erfan & Bagedo General Hospital, King Fahd Street, PO Box 6519, Jeddah 21452, Saudi Arabia
| | - Syed Mustafa Karim
- AlFaisal University College of Medicine, PO Box 50927, Riyadh 11533, Saudi Arabia
- King Faisal Specilalist Hospital and Research Center, MBC J64, PO Box 40047, Jeddah 21499, Saudi Arabia
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Giuliani N, Dalla Palma B, Bolzoni M. Bisphosphonates in Multiple Myeloma: Preclinical and Clinical Data. Clin Rev Bone Miner Metab 2013. [DOI: 10.1007/s12018-013-9143-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Miwa A, Takezako N, Hayakawa H, Hayakawa M, Tominaga SI, Yanagisawa K. YM-175 induces apoptosis of human native monocyte-lineage cells via inhibition of prenylation. Am J Hematol 2012; 87:1084-8. [PMID: 23044853 DOI: 10.1002/ajh.23328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 07/19/2012] [Accepted: 08/15/2012] [Indexed: 01/12/2023]
Abstract
Nitrogen-containing bisphosphonates (NCBPs) have been widely used as standard supportive therapy to reduce skeletal-related events (SREs) in myeloma patients through suppression of osteoclast activity. In various prospective randomized trials that were performed following preliminary reports concerning efficacy, NCBPs have shown a significant beneficial effect on myeloma bone disease through both suppression of bone resorption and direct antimyeloma activity. Thus, NCBPs have an influence on many types of human cells. In this study, we examined the effect of an NCBP (YM-175) on an apoptosis of a monocytic cell line and of human native monocytes/macrophages and dendritic cells (DCs). We confirmed that monocytes, monocyte-derived macrophages, DCs, and a monoblastic cell line (THP-1) showed dose-dependent and time-dependent apoptosis related to the activation of caspases after exposure to YM-175 at concentrations below that at which the apoptosis of myeloma cell lines was induced. Such apoptosis of monocytic cells was suppressed by the addition of farnesol or geranylgeraniol. These findings suggest that the inhibition of monocyte-lineage cells or DCs by NCBPs might interfere with phagocytic activity or pathogen-presenting activity.
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Affiliation(s)
- Akiyoshi Miwa
- Department of Hematology, National Center for Global Health and Medicine, Shinjyuku-ku, Tokyo 162-8655, Japan
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The Medical Research Council Myeloma IX Trial: New Clinical Insights on the Anticancer Effects of Zoledronic Acid in Patients With Multiple Myeloma. CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2012; 12:2-4. [DOI: 10.1016/j.clml.2011.03.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Revised: 03/08/2011] [Accepted: 03/11/2011] [Indexed: 11/19/2022]
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The backbone of progress--preclinical studies and innovations with zoledronic acid. Crit Rev Oncol Hematol 2011; 77 Suppl 1:S3-S12. [PMID: 21353178 DOI: 10.1016/s1040-8428(11)70003-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Bisphosphonates (BPs) are antiresorptive agents that block pathologic bone resorption by inhibiting osteoclast function and later inducing osteoclast apoptosis. These agents localize to bone and break the vicious cycle of bone resorption that results from cross-stimulation between cancer cells and the bone remodeling cells, thereby reducing cancer-induced osteolysis and the tumor burden in bone. Thus nitrogen-containing BPs (N-BPs) have well established clinical benefits in the treatment of bone metastases from solid tumors and bone lesions from multiple myeloma. Preclinical data indicate that N-BPs, especially zoledronic acid (ZOL), can exert antimyeloma activity both in vitro and in vivo. Studies show that N-BPs can inhibit multiple intracellular processes essential for cancer cell proliferation and invasion and induce apoptosis. Furthermore, clinically relevant doses of N-BPs inhibit tumor-associated angiogenesis and can modulate macrophage phenotype in vivo, which is likely to contribute to anticancer effects.
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Fu D, He X, Yang S, Xu W, Lin T, Feng X. Zoledronic acid inhibits vasculogenic mimicry in murine osteosarcoma cell line in vitro. BMC Musculoskelet Disord 2011; 12:146. [PMID: 21718535 PMCID: PMC3136422 DOI: 10.1186/1471-2474-12-146] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 06/30/2011] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND To study the effects of zoledronic acid (ZA) on the vasculogenic mimicry of osteosarcoma cells in vitro. METHODS A Three-dimensional culture of LM8 osteosarcoma cells on a type I collagen matrix was used to investigate whether osteosarcoma cells can develop vasculogenic mimicry, and to determine the effects of ZA on this process. In addition, the cellular ultrastructural changes were observed using scanning electron microscopy and laser confocal microscopy. The effects of ZA on the translocation of RhoA protein from the cytosol to the membrane in LM8 cells were measured via immunoblotting. RESULTS ZA inhibited the development of vasculogenic mimicry by the LM8 osteosarcoma cells, decreased microvilli formation on the cell surface, and disrupted the F-actin cytoskeleton. ZA prevented translocation of RhoA protein from the cytosol to the membrane in LM8 cells. CONCLUSIONS ZA can impair RhoA membrane localization in LM8 cells, causing obvious changes in the ultrastructure of osteosarcoma cells and induce cell apoptosis, which may be one of the underlying mechanisms by which the agent inhibits the development of vasculogenic mimicry by the LM8 cells.
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Affiliation(s)
- Dehao Fu
- Department of Orthopaedics, Huazhong University of Science and Technology, Wuhan, China
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Morgan GJ. Can bisphosphonates improve outcomes in patients with newly diagnosed multiple myeloma? Crit Rev Oncol Hematol 2011; 77 Suppl 1:S24-30. [PMID: 21353177 DOI: 10.1016/s1040-8428(11)70005-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Preclinical and clinical evidence suggests that bisphosphonates have anticancer activities both within and outside bone. Early clinical trials of bisphosphonates provided evidence for antimyeloma effects in exploratory analyses in high-risk subsets, and recent trials of zoledronic acid (ZOL) have provided further support of antimyeloma activity The MRC Myeloma IX trial is an innovative 2 x 2 factorial trial comparing ZOL and clodronate (CLO) in patients with newly diagnosed multiple myeloma receiving either intensive or non-intensive therapy regimens. Results showed that ZOL significantly reduced skeletal morbidity and significantly improved both progression-free and overall survival versus CLO. Notably, the survival benefit with ZOL remained significant after adjustment for skeletal-related events, consistent with clinically meaningful antimyeloma activity. Further analyses of these data will provide greater insight into ZOL interactions with primary treatment regimens for multiple myeloma.
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Affiliation(s)
- Gareth J Morgan
- The Institute of Cancer Research, Royal Marsden NHS Foundation Trust, London, United Kingdom.
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Abeltino M, Bonomini S, Bolzoni M, Storti P, Colla S, Todoerti K, Agnelli L, Neri A, Rizzoli V, Giuliani N. The proapoptotic effect of zoledronic acid is independent of either the bone microenvironment or the intrinsic resistance to bortezomib of myeloma cells and is enhanced by the combination with arsenic trioxide. Exp Hematol 2011; 39:55-65. [DOI: 10.1016/j.exphem.2010.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Revised: 09/16/2010] [Accepted: 10/18/2010] [Indexed: 11/25/2022]
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Isoprenoid biosynthetic pathway inhibition disrupts monoclonal protein secretion and induces the unfolded protein response pathway in multiple myeloma cells. Leuk Res 2010; 35:551-9. [PMID: 20828814 DOI: 10.1016/j.leukres.2010.08.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Revised: 08/10/2010] [Accepted: 08/16/2010] [Indexed: 11/23/2022]
Abstract
Myeloma is characterized by the overproduction and secretion of monoclonal protein. Inhibitors of the isoprenoid biosynthetic pathway (IBP) have pleiotropic effects in myeloma cells. To investigate whether IBP inhibition interferes with monoclonal protein secretion, human myeloma cells were treated with specific inhibitors of the IBP or prenyltransferases. These studies demonstrate that agents that inhibit Rab geranylgeranylation disrupt light chain trafficking, lead to accumulation of light chain in the endoplasmic reticulum, activate the unfolded protein response pathway and induce apoptosis. These studies provide a novel mechanism of action for IBP inhibitors and suggest that further exploration of Rab-targeted agents in myeloma is warranted.
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Mitrofan LM, Pelkonen J, Mönkkönen J. The level of ATP analog and isopentenyl pyrophosphate correlates with zoledronic acid-induced apoptosis in cancer cells in vitro. Bone 2009; 45:1153-60. [PMID: 19699819 DOI: 10.1016/j.bone.2009.08.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 08/05/2009] [Accepted: 08/08/2009] [Indexed: 01/03/2023]
Abstract
Bisphosphonates are potent inhibitors of osteoclast function widely used to treat excessive bone resorption associated, e.g., with bone metastases. They have also antitumor activity. However, it is unclear whether this reflects an indirect effect via inhibition of bone resorption or a direct antitumor effect. Nitrogen-containing bisphosphonates (N-BPs), including zoledronic acid (ZOL), act by inhibiting farnesyl pyrophosphate synthase (FPPS). The mevalonate pathway is blocked and the accumulation of isopentenyl pyrophosphate (IPP) consequently occurs. IPP is conjugated to AMP to form a novel ATP analog (ApppI). The present study was undertaken to clarify whether IPP and/or ApppI has a direct involvement in apoptosis caused by ZOL in different cancer cell lines. There are marked differences in ZOL-induced ApppI formation between different cancer cell lines. On this basis, we selected three cancer cell lines that differ significantly from each other in their ZOL-induced IPP and ApppI accumulation: human estrogen-dependent (MCF7) and estrogen-independent (MDA-MB 436) breast cancer cell lines and a human myeloma cell line (RPMI 8226). The amount of IPP/ApppI correlated with the capacity of cells to undergo apoptosis. Geranylgeraniol (GGOH), an intermediate of mevalonate metabolism, blocks both IPP and ApppI formation and to some degree ZOL-induced apoptosis in a cell line-dependent manner. In addition, lovastatin (LOV), an inhibitor of the enzyme HMGCoA reductase, completely blocks IPP/ApppI formation as determined by mass spectrometry analysis, but enhances apoptosis. In conclusion, the current data suggest that ZOL-induced IPP/ApppI formation can contribute to ZOL-induced apoptosis. This mechanism and the inhibition of protein prenylation, both outcomes of FPPS inhibition in mevalonate pathway, seem to act in concert in ZOL-induced apoptosis in cancer cells.
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Affiliation(s)
- Laura M Mitrofan
- Faculty of Pharmacy, Department of Pharmaceutics, University of Kuopio, Finland
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15
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Differential activities of thalidomide and isoprenoid biosynthetic pathway inhibitors in multiple myeloma cells. Leuk Res 2009; 34:344-51. [PMID: 19646757 DOI: 10.1016/j.leukres.2009.06.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Revised: 06/05/2009] [Accepted: 06/30/2009] [Indexed: 11/21/2022]
Abstract
Thalidomide has emerged as an effective agent for treating multiple myeloma, however the precise mechanism of action remains unknown. Agents known to target the isoprenoid biosynthetic pathway (IBP) can have cytotoxic effects in myeloma cells. The interactions between thalidomide and IBP inhibitors in human multiple myeloma cells were evaluated. Enhanced cytotoxicity and induction of apoptosis were observed in RPMI-8226 cells. Examination of intracellular levels of farnesyl pyrophosphate (FPP) and geranylgeranyl pyrophosphate (GGPP) revealed a wide variance in basal levels and response to IBP inhibitors. These findings provide a mechanism for the differential sensitivity of myeloma cells to pharmacologic manipulation of the IBP.
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Ugur Ural A, Avcu F, Ozturk K. Bisphosphonates may retrieve endothelial function in vascular diseases similar to statins' effects. Eur J Haematol 2008; 81:77-8. [PMID: 18331595 DOI: 10.1111/j.1600-0609.2008.01068.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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