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Sensitization of prostate cancer to radiation therapy: Molecules and pathways to target. Radiother Oncol 2018; 128:283-300. [PMID: 29929859 DOI: 10.1016/j.radonc.2018.05.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 05/01/2018] [Accepted: 05/17/2018] [Indexed: 12/11/2022]
Abstract
Radiation therapy is used to treat cancer by radiation-induced DNA damage. Despite the best efforts to eliminate cancer, some cancer cells survive irradiation, resulting in cancer progression or recurrence. Alteration in DNA damage repair pathways is common in cancers, resulting in modulation of their response to radiation. This article focuses on the recent findings about molecules and pathways that potentially can be targeted to sensitize prostate cancer cells to ionizing radiation, thereby achieving an improved therapeutic outcome.
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Bartelink IH, Prideaux B, Krings G, Wilmes L, Lee PRE, Bo P, Hann B, Coppé JP, Heditsian D, Swigart-Brown L, Jones EF, Magnitsky S, Keizer RJ, de Vries N, Rosing H, Pawlowska N, Thomas S, Dhawan M, Aggarwal R, Munster PN, Esserman LJ, Ruan W, Wu AHB, Yee D, Dartois V, Savic RM, Wolf DM, van ’t Veer L. Heterogeneous drug penetrance of veliparib and carboplatin measured in triple negative breast tumors. Breast Cancer Res 2017; 19:107. [PMID: 28893315 PMCID: PMC5594551 DOI: 10.1186/s13058-017-0896-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 08/14/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Poly(ADP-ribose) polymerase inhibitors (PARPi), coupled to a DNA damaging agent is a promising approach to treating triple negative breast cancer (TNBC). However, not all patients respond; we hypothesize that non-response in some patients may be due to insufficient drug penetration. As a first step to testing this hypothesis, we quantified and visualized veliparib and carboplatin penetration in mouse xenograft TNBCs and patient blood samples. METHODS MDA-MB-231, HCC70 or MDA-MB-436 human TNBC cells were implanted in 41 beige SCID mice. Low dose (20 mg/kg) or high dose (60 mg/kg) veliparib was given three times daily for three days, with carboplatin (60 mg/kg) administered twice. In addition, blood samples were analyzed from 19 patients from a phase 1 study of carboplatin + PARPi talazoparib. Veliparib and carboplatin was quantified using liquid chromatography-mass spectrometry (LC-MS). Veliparib tissue penetration was visualized using matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI-MSI) and platinum adducts (covalent nuclear DNA-binding) were quantified using inductively coupled plasma-mass spectrometry (ICP-MS). Pharmacokinetic modeling and Pearson's correlation were used to explore associations between concentrations in plasma, tumor cells and peripheral blood mononuclear cells (PBMCs). RESULTS Veliparib penetration in xenograft tumors was highly heterogeneous between and within tumors. Only 35% (CI 95% 26-44%), 74% (40-97%) and 46% (9-37%) of veliparib observed in plasma penetrated into MDA-MB-231, HCC70 and MDA-MB-436 cell-based xenografts, respectively. Within tumors, penetration heterogeneity was larger with the 60 mg/kg compared to the 20 mg/kg dose (RSD 155% versus 255%, P = 0.001). These tumor concentrations were predicted similar to clinical dosing levels, but predicted tumor concentrations were below half maximal concentration values as threshold of response. Xenograft veliparib concentrations correlated positively with platinum adduct formation (R 2 = 0.657), but no PARPi-platinum interaction was observed in patients' PBMCs. Platinum adduct formation was significantly higher in five gBRCA carriers (ratio of platinum in DNA in PBMCs/plasma 0.64% (IQR 0.60-1.16%) compared to nine non-carriers (ratio 0.29% (IQR 0.21-0.66%, P < 0.0001). CONCLUSIONS PARPi/platinum tumor penetration can be measured by MALDI-MSI and ICP-MS in PBMCs and fresh frozen, OCT embedded core needle biopsies. Large variability in platinum adduct formation and spatial heterogeneity in veliparib distribution may lead to insufficient drug exposure in select cell populations.
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Affiliation(s)
- Imke H. Bartelink
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Brendan Prideaux
- Rutgers New Jersey Medical School, Public Health Research Institute, Rutgers, The State University of New Jersey, 225 Warren Ave, Newark, NJ USA
| | - Gregor Krings
- Department of Pathology, University of California, San Francisco, CA USA
| | - Lisa Wilmes
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA USA
| | - Pei Rong Evelyn Lee
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Pan Bo
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Byron Hann
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Jean-Philippe Coppé
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Diane Heditsian
- Patient advocate University of California, San Francisco Breast Science Advocacy Core, San Francisco, CA USA
| | - Lamorna Swigart-Brown
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Ella F. Jones
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA USA
| | - Sergey Magnitsky
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA USA
| | - Ron J Keizer
- Department of Bioengineering & Therapeutic Sciences, University of California San Francisco, San Francisco, USA
| | - Niels de Vries
- Department of Clinical Pharmacy, Department of Pharmacy & Pharmacology, The Netherlands Cancer Institute, NKI-AVL, Amsterdam, The Netherlands
| | - Hilde Rosing
- Department of Clinical Pharmacy, Department of Pharmacy & Pharmacology, The Netherlands Cancer Institute, NKI-AVL, Amsterdam, The Netherlands
| | - Nela Pawlowska
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Scott Thomas
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Mallika Dhawan
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Rahul Aggarwal
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Pamela N. Munster
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Laura J. Esserman
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Weiming Ruan
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA USA
| | - Alan H. B. Wu
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA USA
| | - Douglas Yee
- Division of Hematology Oncology, University of Minnesota, Minneapolis, MN USA
| | - Véronique Dartois
- Rutgers New Jersey Medical School, Public Health Research Institute, Rutgers, The State University of New Jersey, 225 Warren Ave, Newark, NJ USA
| | - Radojka M. Savic
- Department of Bioengineering & Therapeutic Sciences, University of California San Francisco, San Francisco, USA
| | - Denise M. Wolf
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Laura van ’t Veer
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
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Feng FY, Zhang Y, Kothari V, Evans JR, Jackson WC, Chen W, Johnson SB, Luczak C, Wang S, Hamstra DA. MDM2 Inhibition Sensitizes Prostate Cancer Cells to Androgen Ablation and Radiotherapy in a p53-Dependent Manner. Neoplasia 2017; 18:213-22. [PMID: 27108384 PMCID: PMC4840291 DOI: 10.1016/j.neo.2016.01.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 01/27/2016] [Indexed: 11/23/2022]
Abstract
PURPOSE: Increased murine double minute 2 (MDM2) expression, independent of p53 status, is associated with increased cancer-specific mortality for men with prostate cancer treated with radiotherapy. We assessed MI-219, a small molecule inhibitor of MDM2 with improved pharmacokinetics over nutlin-3, for sensitization of prostate cancer cells to radiotherapy and androgen deprivation therapy, a standard treatment option for men with high-risk prostate cancer. EXPERIMENTAL DESIGN: The effect of MDM2 inhibition by MI-219 was assessed in vitro and in vivo with mouse xenograft models across multiple prostate cancer cell lines containing varying p53 functional status. RESULTS: MDM2 inhibition by MI-219 resulted in dose- and time-dependent p53 activation and decreased clonogenic cell survival after radiation in a p53-dependent manner. Mechanistically, radiosensitization following inhibition of MDM2 was largely the result of p53-dependent increases in apoptosis and DNA damage as evidenced by Annexin V flow cytometry and γ-H2AX foci immunofluorescence. Similarly, treatment with MI-219 enhanced response to antiandrogen therapy via a p53-dependent increase in apoptotic cell death. Lastly, triple therapy with radiation, androgen deprivation therapy, and MI-219 decreased xenograft tumor growth compared with any single- or double-agent treatment. CONCLUSION: MDM2 inhibition with MI-219 results in p53-dependent sensitization of prostate cancer cells to radiation, antiandrogen therapy, and the combination. These findings support MDM2 small molecule inhibitor therapy as a therapy intensification strategy to improve clinical outcomes in high-risk localized prostate cancer. TRANSLATIONAL RELEVANCE: The combination of radiotherapy and androgen deprivation therapy is a standard treatment option for men with high-risk prostate cancer. Despite improvements in outcomes when androgen deprivation therapy is added to radiation, men with high-risk prostate cancer have significant risk for disease recurrence, progression, and even death within the first 10 years following treatment. We demonstrate that treatment with MI-219 (an inhibitor of MDM2) results in prostate cancer cell sensitization to radiation and androgen deprivation therapy in vitro and in vivo. Triple therapy with MI-219, radiation, and androgen deprivation therapy dramatically decreased tumor growth compared with any single- or double-agent therapy. These findings provide evidence that inhibition of MDM2 is a viable means by which to enhance the efficacy of both radiation and androgen deprivation therapy and thereby improve outcomes in the treatment of prostate cancer. As such, further investigation is warranted to translate these findings to the clinical setting.
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Affiliation(s)
- Felix Y Feng
- Departments of Radiation Oncology, Urology, and Medicine, University of California at San Francisco, San Francisco, CA; Helen Diller Family Comprehensive Cancer Center; Department of Radiation Oncology, University of Michigan, Ann Arbor, MI.
| | - Yu Zhang
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Vishal Kothari
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Joseph R Evans
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - William C Jackson
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Wei Chen
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Skyler B Johnson
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Connor Luczak
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Shaomeng Wang
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA; Departments of Internal Medicine, Pharmacology, and Medicinal Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - Daniel A Hamstra
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI; Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA.
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Dal Pra A, Locke JA, Borst G, Supiot S, Bristow RG. Mechanistic Insights into Molecular Targeting and Combined Modality Therapy for Aggressive, Localized Prostate Cancer. Front Oncol 2016; 6:24. [PMID: 26909338 PMCID: PMC4754414 DOI: 10.3389/fonc.2016.00024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 01/22/2016] [Indexed: 12/12/2022] Open
Abstract
Radiation therapy (RT) is one of the mainstay treatments for prostate cancer (PCa). The potentially curative approaches can provide satisfactory results for many patients with non-metastatic PCa; however, a considerable number of individuals may present disease recurrence and die from the disease. Exploiting the rich molecular biology of PCa will provide insights into how the most resistant tumor cells can be eradicated to improve treatment outcomes. Important for this biology-driven individualized treatment is a robust selection procedure. The development of predictive biomarkers for RT efficacy is therefore of utmost importance for a clinically exploitable strategy to achieve tumor-specific radiosensitization. This review highlights the current status and possible opportunities in the modulation of four key processes to enhance radiation response in PCa by targeting the: (1) androgen signaling pathway; (2) hypoxic tumor cells and regions; (3) DNA damage response (DDR) pathway; and (4) abnormal extra-/intracell signaling pathways. In addition, we discuss how and which patients should be selected for biomarker-based clinical trials exploiting and validating these targeted treatment strategies with precision RT to improve cure rates in non-indolent, localized PCa.
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Affiliation(s)
- Alan Dal Pra
- Radiation Medicine Program, Ontario Cancer Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada; Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada
| | - Jennifer A Locke
- Radiation Medicine Program, Ontario Cancer Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada; Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada
| | - Gerben Borst
- Radiation Medicine Program, Ontario Cancer Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada; Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada
| | - Stephane Supiot
- Integrated Center of Oncology (ICO) René Gauducheau , Nantes , France
| | - Robert G Bristow
- Radiation Medicine Program, Ontario Cancer Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada; Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada
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Imaging mass spectrometry: challenges in visualization of drug distribution in solid tumors. Curr Opin Pharmacol 2013; 13:807-12. [DOI: 10.1016/j.coph.2013.06.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 06/06/2013] [Accepted: 06/07/2013] [Indexed: 12/31/2022]
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Valerie NCK, Casarez EV, Dasilva JO, Dunlap-Brown ME, Parsons SJ, Amorino GP, Dziegielewski J. Inhibition of neurotensin receptor 1 selectively sensitizes prostate cancer to ionizing radiation. Cancer Res 2011; 71:6817-26. [PMID: 21903767 DOI: 10.1158/0008-5472.can-11-1646] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Radiotherapy combined with androgen depletion is generally successful for treating locally advanced prostate cancer. However, radioresistance that contributes to recurrence remains a major therapeutic problem in many patients. In this study, we define the high-affinity neurotensin receptor 1 (NTR1) as a tractable new molecular target to radiosensitize prostate cancers. The selective NTR1 antagonist SR48692 sensitized prostate cancer cells in a dose- and time-dependent manner, increasing apoptotic cell death and decreasing clonogenic survival. The observed cancer selectivity for combinations of SR48692 and radiation reflected differential expression of NTR1, which is highly expressed in prostate cancer cells but not in normal prostate epithelial cells. Radiosensitization was not affected by androgen dependence or androgen receptor expression status. NTR1 inhibition in cancer cell-attenuated epidermal growth factor receptor activation and downstream signaling, whether induced by neurotensin or ionizing radiation, establish a molecular mechanism for sensitization. Most notably, SR48692 efficiently radiosensitized PC-3M orthotopic human tumor xenografts in mice, and significantly reduced tumor burden. Taken together, our findings offer preclinical proof of concept for targeting the NTR1 receptor as a strategy to improve efficacy and outcomes of prostate cancer treatments using radiotherapy.
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Affiliation(s)
- Nicholas C K Valerie
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
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Wedel S, Hudak L, Seibel JM, Makarević J, Juengel E, Tsaur I, Waaga-Gasser A, Haferkamp A, Blaheta RA. Molecular targeting of prostate cancer cells by a triple drug combination down-regulates integrin driven adhesion processes, delays cell cycle progression and interferes with the cdk-cyclin axis. BMC Cancer 2011; 11:375. [PMID: 21867506 PMCID: PMC3170298 DOI: 10.1186/1471-2407-11-375] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 08/25/2011] [Indexed: 11/24/2022] Open
Abstract
Background Single drug use has not achieved satisfactory results in the treatment of prostate cancer, despite application of increasingly widespread targeted therapeutics. In the present study, the combined impact of the mammalian target of rapamycin (mTOR)-inhibitor RAD001, the dual EGFr and VGEFr tyrosine kinase inhibitor AEE788 and the histone deacetylase (HDAC)-inhibitor valproic acid (VPA) on prostate cancer growth and adhesion in vitro was investigated. Methods PC-3, DU-145 and LNCaP cells were treated with RAD001, AEE788 or VPA or with a RAD-AEE-VPA combination. Tumor cell growth, cell cycle progression and cell cycle regulating proteins were then investigated by MTT-assay, flow cytometry and western blotting, respectively. Furthermore, tumor cell adhesion to vascular endothelium or to immobilized extracellular matrix proteins as well as migratory properties of the cells was evaluated, and integrin α and β subtypes were analyzed. Finally, effects of drug treatment on cell signaling pathways were determined. Results All drugs, separately applied, reduced tumor cell adhesion, migration and growth. A much stronger anti-cancer effect was evoked by the triple drug combination. Particularly, cdk1, 2 and 4 and cyclin B were reduced, whereas p27 was elevated. In addition, simultaneous application of RAD001, AEE788 and VPA altered the membranous, cytoplasmic and gene expression pattern of various integrin α and β subtypes, reduced integrin-linked kinase (ILK) and deactivated focal adhesion kinase (FAK). Signaling analysis revealed that EGFr and the downstream target Akt, as well as p70S6k was distinctly modified in the presence of the drug combination. Conclusions Simultaneous targeting of several key proteins in prostate cancer cells provides an advantage over targeting a single pathway. Since strong anti-tumor properties became evident with respect to cell growth and adhesion dynamics, the triple drug combination might provide progress in the treatment of advanced prostate cancer.
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Affiliation(s)
- Steffen Wedel
- Department of Urology, Goethe-University, Frankfurt am Main, Germany
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Wedel S, Hudak L, Seibel JM, Juengel E, Oppermann E, Haferkamp A, Blaheta RA. Critical analysis of simultaneous blockage of histone deacetylase and multiple receptor tyrosine kinase in the treatment of prostate cancer. Prostate 2011; 71:722-35. [PMID: 20954195 DOI: 10.1002/pros.21288] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Accepted: 09/07/2010] [Indexed: 11/09/2022]
Abstract
BACKGROUND The concept of molecular tumor targeting might be an innovative option to treat advanced prostate cancer. We analyzed the effect of combining the multiple receptor tyrosine kinase inhibitor AEE788 and the histone deacetylase (HDAC) inhibitor valproic acid (VPA) on adhesion and growth properties of prostate cancer cell lines. METHODS PC-3, DU-145, and LNCaP cells were treated with AEE788, VPA or with an AEE788-VPA combination, and cell cycle progression investigated. Furthermore, tumor cell adhesion to vascular endothelium or to immobilized extracellular matrix proteins was evaluated, and integrin α and β subtypes were analyzed. Finally, effects of drug treatment on cell signaling pathways were determined. RESULTS AEE788 moderately and VPA strongly reduced tumor cell adhesion and growth. VPA impaired cell cycle progression and altered the expression level of the cell cycle regulating proteins cdk1, cdk2, cdk4, cyclin B, D1, cyclin E, p21, and p27. VPA also acted on the membranous, cytoplasmic, and gene expression pattern of various integrin α and β subtypes. AEE788 acted likewise, but more moderately. Combining AEE788 and VPA did not result in an additive anti-tumor effect. Signaling analysis revealed that the EGFr downstream target Akt was similarly modified in the presence of VPA or the VPA-AEE788 combination, but not influenced by AEE788 alone. CONCLUSIONS The AEE788-VPA combination has no advantage over VPA monotreatment in vitro. The non-responsiveness of Akt
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Affiliation(s)
- Steffen Wedel
- Department of Urology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
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Rauser S, Deininger SO, Suckau D, Höfler H, Walch A. Approaching MALDI molecular imaging for clinical proteomic research: current state and fields of application. Expert Rev Proteomics 2011; 7:927-41. [PMID: 21142893 DOI: 10.1586/epr.10.83] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
MALDI imaging mass spectrometry ('MALDI imaging') is an increasingly recognized technique for biomarker research. After years of method development in the scientific community, the technique is now increasingly applied in clinical research. In this article, we discuss the use of MALDI imaging in clinical proteomics and put it in context with classical proteomics techniques. We also highlight a number of upcoming challenges for personalized medicine, development of targeted therapies and diagnostic molecular pathology where MALDI imaging could help.
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Affiliation(s)
- Sandra Rauser
- Institute of Pathology, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstädter Landstraße 1, Neuherberg, Germany
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Barbarroja N, Torres LA, Rodriguez-Ariza A, Valverde-Estepa A, Lopez-Sanchez LM, Ruiz-Limon P, Perez-Sanchez C, Carretero RM, Velasco F, López-Pedrera C. AEE788 is a vascular endothelial growth factor receptor tyrosine kinase inhibitor with antiproliferative and proapoptotic effects in acute myeloid leukemia. Exp Hematol 2010; 38:641-52. [PMID: 20380868 DOI: 10.1016/j.exphem.2010.03.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 03/26/2010] [Accepted: 03/26/2010] [Indexed: 01/31/2023]
Abstract
OBJECTIVE Aberrant activation of tyrosine kinase receptors is frequently observed in acute myelogenous leukemia (AML). Moreover, activating mutations of the fms-like tyrosine kinase 3 (FLT3) receptor can be found in approximately 30% of patients, thereby representing one of the most frequent single genetic alterations in AML. AEE788, a novel dual receptor tyrosine kinase inhibitor of endothelial growth factor and vascular endothelial growth factor (VEGF), is being studied in several solid tumors with remarkable success. It is not known, however, about the efficacy of this inhibitor in the treatment of AML. Therefore, we investigated the effect of AEE788 in the treatment of three human AML cell lines and seven AML patient samples. MATERIALS AND METHODS Cell survival in THP-1, MOLM-13, and MV4-11 cell lines (the two last harboring the FLT3/internal tandem duplication mutation) and AML blasts incubated with 0.5 to 15 microM AEE788 were quantified. We also studied the activation of VEGF/VEGF receptors loop, FLT3, and their downstream effectors (Akt, extracellular signal-regulated kinase, signal transducers and activators of transcription 5, and nuclear factor-kappaB). RESULTS Our data showed that AEE788 was a tyrosine kinase inhibitor of FLT3 activity and had antiproliferative and proapoptotic activity in AML-derived cell lines and AML blasts that presented phosphorylation of the FLT3 receptor. Consistently, in these cells AEE788 abrogated VEGF/VEGF receptors activation and the survival signaling pathways studied. CONCLUSION Taken together, the activity of AEE788 might represent a promising new option of targeting FLT3 for the treatment of AML.
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Affiliation(s)
- Nuria Barbarroja
- Fundación IMABIS, Hospital Universitario Virgen de la Victoria, Málaga, Spain.
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Franck J, Arafah K, Elayed M, Bonnel D, Vergara D, Jacquet A, Vinatier D, Wisztorski M, Day R, Fournier I, Salzet M. MALDI imaging mass spectrometry: state of the art technology in clinical proteomics. Mol Cell Proteomics 2009; 8:2023-33. [PMID: 19451175 DOI: 10.1074/mcp.r800016-mcp200] [Citation(s) in RCA: 140] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A decade after its inception, MALDI imaging mass spectrometry has become a unique technique in the proteomics arsenal for biomarker hunting in a variety of diseases. At this stage of development, it is important to ask whether we can consider this technique to be sufficiently developed for routine use in a clinical setting or an indispensable technology used in translational research. In this report, we consider the contributions of MALDI imaging mass spectrometry and profiling technologies to clinical studies. In addition, we outline new directions that are required to align these technologies with the objectives of clinical proteomics, including: 1) diagnosis based on profile signatures that complement histopathology, 2) early detection of disease, 3) selection of therapeutic combinations based on the individual patient's entire disease-specific protein network, 4) real time assessment of therapeutic efficacy and toxicity, 5) rational redirection of therapy based on changes in the diseased protein network that are associated with drug resistance, and 6) combinatorial therapy in which the signaling pathway itself is viewed as the target rather than any single "node" in the pathway.
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Affiliation(s)
- Julien Franck
- MALDI Imaging Team, Laboratoire de Neuroimmunologie des Annélides, IFR 147, CNR-FRE 2933, University of Lille1, 59655 Villeneuve d'Ascq, France
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