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Dyshlovoy SA, Hauschild J, Venz S, Krisp C, Kolbe K, Zapf S, Heinemann S, Fita KD, Shubina LK, Makarieva TN, Guzii AG, Rohlfing T, Kaune M, Busenbender T, Mair T, Moritz M, Poverennaya EV, Schlüter H, Serdyuk V, Stonik VA, Dierlamm J, Bokemeyer C, Mohme M, Westphal M, Lamszus K, von Amsberg G, Maire CL. Rhizochalinin Exhibits Anticancer Activity and Synergizes with EGFR Inhibitors in Glioblastoma In Vitro Models. Mol Pharm 2023; 20:4994-5005. [PMID: 37733943 DOI: 10.1021/acs.molpharmaceut.3c00217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Rhizochalinin (Rhiz) is a recently discovered cytotoxic sphingolipid synthesized from the marine natural compound rhizochalin. Previously, Rhiz demonstrated high in vitro and in vivo efficacy in various cancer models. Here, we report Rhiz to be highly active in human glioblastoma cell lines as well as in patient-derived glioma-stem like neurosphere models. Rhiz counteracted glioblastoma cell proliferation by inducing apoptosis, G2/M-phase cell cycle arrest, and inhibition of autophagy. Proteomic profiling followed by bioinformatic analysis suggested suppression of the Akt pathway as one of the major biological effects of Rhiz. Suppression of Akt as well as IGF-1R and MEK1/2 kinase was confirmed in Rhiz-treated GBM cells. In addition, Rhiz pretreatment resulted in a more pronounced inhibitory effect of γ-irradiation on the growth of patient-derived glioma-spheres, an effect to which the Akt inhibition may also contribute decisively. In contrast, EGFR upregulation, observed in all GBM neurospheres under Rhiz treatment, was postulated to be a possible sign of incipient resistance. In line with this, combinational therapy with EGFR-targeted tyrosine kinase inhibitors synergistically increased the efficacy of Rhiz resulting in dramatic inhibition of GBM cell viability as well as a significant reduction of neurosphere size in the case of combination with lapatinib. Preliminary in vitro data generated using a parallel artificial membrane permeability (PAMPA) assay suggested that Rhiz cannot cross the blood brain barrier and therefore alternative drug delivery methods should be used in the further in vivo studies. In conclusion, Rhiz is a promising new candidate for the treatment of human glioblastoma, which should be further developed in combination with EGFR inhibitors.
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Affiliation(s)
- Sergey A Dyshlovoy
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
- Laboratory of Biologically Active Compounds, Institute of Science-Intensive Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok 690922, Russian Federation
| | - Jessica Hauschild
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Simone Venz
- Department of Medical Biochemistry and Molecular Biology, University of Greifswald, Greifswald 17489, Germany
- Interfacultary Institute of Genetics and Functional Genomics, Department of Functional Genomics, University of Greifswald, Greifswald 17489, Germany
| | - Christoph Krisp
- Section / Core Facility Mass Spectrometric Proteomics, Center of Diagnostics, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Katharina Kolbe
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Svenja Zapf
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Sarina Heinemann
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Krystian D Fita
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Larisa K Shubina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok 690022, Russian Federation
| | - Tatyana N Makarieva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok 690022, Russian Federation
| | - Alla G Guzii
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok 690022, Russian Federation
| | - Tina Rohlfing
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Moritz Kaune
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Tobias Busenbender
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Thomas Mair
- Section / Core Facility Mass Spectrometric Proteomics, Center of Diagnostics, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Manuela Moritz
- Section / Core Facility Mass Spectrometric Proteomics, Center of Diagnostics, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Ekaterina V Poverennaya
- Laboratory of Proteoform Interactomics, Institute of Biomedical Chemistry, Moscow 119121, Russian Federation
| | - Hartmut Schlüter
- Section / Core Facility Mass Spectrometric Proteomics, Center of Diagnostics, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Volodymyr Serdyuk
- Zentrum für Molekulare Neurobiologie (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Valentin A Stonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok 690022, Russian Federation
| | - Judith Dierlamm
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Carsten Bokemeyer
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Malte Mohme
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Manfred Westphal
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Katrin Lamszus
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Gunhild von Amsberg
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum - University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg 20251, Germany
| | - Cecile L Maire
- Laboratory for Brain Tumor Research, Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg 20251, Germany
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Dyshlovoy SA, Busenbender T, Hauschild J, Girich EV, Kriegs M, Hoffer K, Graefen M, Yurchenko AN, Bokemeyer C, von Amsberg G. Cytotoxic N-Methylpretrichodermamide B Reveals Anticancer Activity and Inhibits P-Glycoprotein in Drug-Resistant Prostate Cancer Cells. Mar Drugs 2022; 20:597. [PMID: 36286421 PMCID: PMC9605374 DOI: 10.3390/md20100597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/19/2022] [Accepted: 09/19/2022] [Indexed: 11/25/2022] Open
Abstract
N-methylpretrichodermamide B (NB) is a biologically active epidithiodiketopiperazine isolated from several strains of the algae-derived fungus Penicillium sp. Recently, we reported the first data on its activity in human cancer cells lines in vitro. Here, we investigated the activity, selectivity, and mechanism of action of NB in human prostate cancer cell lines, including drug-resistant subtypes. NB did not reveal cross-resistance to docetaxel in the PC3-DR cell line model and was highly active in hormone-independent 22Rv1 cells. NB-induced cell death was stipulated by externalization of phosphatidylserine and activation of caspase-3. Moreover, inhibition of caspase activity by z-VAD(OMe)-fmk did not affect NB cytotoxicity, suggesting a caspase-independent cell death induced by NB. The compound has a moderate p-glycoprotein (p-gp) substrate-like affinity and can simultaneously inhibit p-gp at nanomolar concentrations. Therefore, NB resensitized p-gp-overexpressing PC3-DR cells to docetaxel. A kinome profiling of the NB-treated cells revealed, among other things, an induction of mitogen-activated protein kinases JNK1/2 and p38. Further functional analysis confirmed an activation of both kinases and indicated a prosurvival role of this biological event in the cellular response to the treatment. Overall, NB holds promising anticancer potential and further structure-activity relationship studies and structural optimization are needed in order to improve its biological properties.
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Affiliation(s)
- Sergey A. Dyshlovoy
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, FEFU Campus, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Tobias Busenbender
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Jessica Hauschild
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Elena V. Girich
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, 690022 Vladivostok, Russia
| | - Malte Kriegs
- Department of Radiotherapy & Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- UCCH Kinomics Core Facility, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20461 Hamburg, Germany
| | - Konstantin Hoffer
- Department of Radiotherapy & Radiation Oncology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- UCCH Kinomics Core Facility, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20461 Hamburg, Germany
| | - Markus Graefen
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Anton N. Yurchenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Prospect 100 let Vladivostoku 159, 690022 Vladivostok, Russia
| | - Carsten Bokemeyer
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Gunhild von Amsberg
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Tumorzentrum—University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
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Dyshlovoy SA, Shubina LK, Makarieva TN, Hauschild J, Strewinsky N, Guzii AG, Menshov AS, Popov RS, Grebnev BB, Busenbender T, Oh-Hohenhorst SJ, Maurer T, Tilki D, Graefen M, Bokemeyer C, Stonik VA, von Amsberg G. New diterpenes from the marine sponge Spongionella sp. overcome drug resistance in prostate cancer by inhibition of P-glycoprotein. Sci Rep 2022; 12:13570. [PMID: 35945234 PMCID: PMC9363487 DOI: 10.1038/s41598-022-17447-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 07/26/2022] [Indexed: 01/18/2023] Open
Abstract
Spongian diterpenes are a group of marine natural compounds possessing various biological activities. However, their anticancer activity is still poorly studied and understood. We isolated six spongian diterpenes from the marine sponge Spongionella sp., including one new spongionellol A and five previously known molecules. The structures were elucidated using a detailed analysis MS and NMR spectra as well as by comparison with previously reported data. Two of them, namely, spongionellol A and 15,16-dideoxy-15α,17β-dihydroxy-15,17-oxidospongian-16-carboxylate-15,17-diacetate exhibited high activity and selectivity in human prostate cancer cells, including cells resistant to hormonal therapy and docetaxel. The mechanism of action has been identified as caspase-dependent apoptosis. Remarkably, both compounds were able to suppress expression of androgen receptor (AR) and AR-splice variant 7, as well as AR-dependent signaling. The isolated diterpenes effectively inhibited drug efflux mediated by multidrug-resistance protein 1 (MDR1; p-glycoprotein). Of note, a synergistic effect of the compounds with docetaxel, a substrate of p-glycoprotein, suggests resensitization of p-glycoprotein overexpressing cells to standard chemotherapy. In conclusion, the isolated spongian diterpenes possess high activity and selectivity towards prostate cancer cells combined with the ability to inhibit one of the main drug-resistance mechanism. This makes them promising candidates for combinational anticancer therapy.
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Affiliation(s)
- Sergey A Dyshlovoy
- Department of Oncology, Hematology and Bone Marrow Transplantation With Section Pneumology, Hubertus Wald Tumorzentrum-University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany. .,Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany. .,Institute of Science-Intensive Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok, Russian Federation.
| | - Larisa K Shubina
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Tatyana N Makarieva
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Jessica Hauschild
- Department of Oncology, Hematology and Bone Marrow Transplantation With Section Pneumology, Hubertus Wald Tumorzentrum-University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Nadja Strewinsky
- Department of Oncology, Hematology and Bone Marrow Transplantation With Section Pneumology, Hubertus Wald Tumorzentrum-University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alla G Guzii
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Alexander S Menshov
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Roman S Popov
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Boris B Grebnev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Tobias Busenbender
- Department of Oncology, Hematology and Bone Marrow Transplantation With Section Pneumology, Hubertus Wald Tumorzentrum-University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Su Jung Oh-Hohenhorst
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany.,Centre de Recherche du Centre hospitalier de l'Université de Montréal (CRCHUM) Et Institut du Cancer de Montréal, Montreal, QC, Canada
| | - Tobias Maurer
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany.,Department of Urology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Derya Tilki
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany.,Department of Urology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Graefen
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Carsten Bokemeyer
- Department of Oncology, Hematology and Bone Marrow Transplantation With Section Pneumology, Hubertus Wald Tumorzentrum-University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Valentin A Stonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Gunhild von Amsberg
- Department of Oncology, Hematology and Bone Marrow Transplantation With Section Pneumology, Hubertus Wald Tumorzentrum-University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany
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Dyshlovoy SA, Pelageev DN, Jakob LS, Borisova KL, Hauschild J, Busenbender T, Kaune M, Khmelevskaya EA, Graefen M, Bokemeyer C, Anufriev VP, von Amsberg G. Activity of New Synthetic (2-Chloroethylthio)-1,4-naphthoquinones in Prostate Cancer Cells. Pharmaceuticals (Basel) 2021; 14:ph14100949. [PMID: 34681173 PMCID: PMC8540265 DOI: 10.3390/ph14100949] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 12/14/2022] Open
Abstract
Development of resistance to currently available standard therapies in advanced prostate cancer (PCa) emphasizes the need for novel therapeutic options. Here, we report the synthesis of new hybrid molecules consisting of 2-chloroethylthio and 1,4-naphthoquinone pharmacophores and describe their activity in PCa. In screening analyses, the introduction of one 2-chloroethylthio group improved the anticancer properties of 1,4-naphthoquinones, whereas the introduction of a second 2-chloroethylthio moiety rather decreased activity. Two most promising of the synthesized compounds, 30 and 32, were highly active in different human PCa cell lines harboring varying resistance profiles at nanomolar concentrations. The generated data suggest that the compounds are capable of mitochondria targeting, cytotoxic ROS induction, and DNA damage, which resulted in apoptosis presumably executed in a caspase-dependent manner. The substances synergized with the clinically approved PARP inhibitor olaparib and resensitized AR-V7-expressing PCa cells to antiandrogen enzalutamide, as well as to a combination of enzalutamide and an AKT inhibitor. This was at least in part exerted via down-regulation of AR-V7 expression and inhibition of AR signaling. Mild antagonism was observed in combination with platinum- or taxane-based chemotherapy, which was putatively related to treatment-induced activation of p38, JNK1/2, ERK1/2, MEK1/2, and AKT, functioning as potential pro-survival factors. Thus, the synthesized (2-chloroethylthio)-1,4-naphthoquinone derivatives exhibit promising anticancer properties in vitro, suggesting their further development as potential therapeutics for the treatment of castration-resistant PCa.
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Affiliation(s)
- Sergey A. Dyshlovoy
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (L.S.J.); (J.H.); (T.B.); (M.K.); (C.B.); (G.v.A.)
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany;
- School of Natural Sciences, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia; (D.N.P.); (E.A.K.)
- Correspondence: or ; Tel.: +49-40-7410-51950
| | - Dmitry N. Pelageev
- School of Natural Sciences, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia; (D.N.P.); (E.A.K.)
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (K.L.B.); (V.P.A.)
| | - Lea S. Jakob
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (L.S.J.); (J.H.); (T.B.); (M.K.); (C.B.); (G.v.A.)
| | - Ksenia L. Borisova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (K.L.B.); (V.P.A.)
| | - Jessica Hauschild
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (L.S.J.); (J.H.); (T.B.); (M.K.); (C.B.); (G.v.A.)
| | - Tobias Busenbender
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (L.S.J.); (J.H.); (T.B.); (M.K.); (C.B.); (G.v.A.)
| | - Moritz Kaune
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (L.S.J.); (J.H.); (T.B.); (M.K.); (C.B.); (G.v.A.)
| | - Ekaterina A. Khmelevskaya
- School of Natural Sciences, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia; (D.N.P.); (E.A.K.)
| | - Markus Graefen
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany;
| | - Carsten Bokemeyer
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (L.S.J.); (J.H.); (T.B.); (M.K.); (C.B.); (G.v.A.)
| | - Victor Ph. Anufriev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (K.L.B.); (V.P.A.)
| | - Gunhild von Amsberg
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (L.S.J.); (J.H.); (T.B.); (M.K.); (C.B.); (G.v.A.)
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany;
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Busenbender T, Dyshlovoy S, Kaune M, Boeckelmann L, Lange T, Schumacher U, Pelageev DN, Sabutskii YE, Borisova K, Anufriev VP, Graefen M, Bokemeyer C, Von Amsberg G. In vitro and in vivo investigations of novel 1,4-napthoquinone sulphomethylene carbohydrate conjugates in prostate cancer. J Clin Oncol 2021. [DOI: 10.1200/jco.2021.39.6_suppl.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
104 Background: The Warburg effect describes the ability of cancer cells to consume larger amounts of glucose in comparison to normal tissue, due to the overexpression of insulin-independent glucose transporters (e.g. GLUT1). This effect can be used to enhance the selectivity and reduce side effects of cytotoxic anticancer molecules by its conjugation to sugar residues, thus, generating cytotoxic agents showing higher selectivity to cancer cells. In continuation of our research on anticancer natural 1,4-naphthoquinones we have investigated a large series of novel semi-synthetic molecules containing 1,4-naphthoquinones element conjugated with glucose molecule via -S-CH2- bond. Methods: We performed screening examinations for 35 novel synthetic molecules in human prostate cancer in vitro. The selected most active compounds were tested in several human prostate cancer cell lines harboring different levels of drug resistance, as well as in non-malignant cells to specify their selectivity. Compounds with the highest cytotoxicity and selectivity were further investigated. The mode of action was assessed including effects on apoptosis induction, oxidative stress, mitochondria, AR-signaling as well as glucose uptake and ER stress were assessed. In vivo dose finding and efficacy analyses were performed. Results: We identified two promising derivatives, showing IC50s at low micro- and nanomolar concentrations. Glucose depletion from the culture media led to increased cytotoxicity and cotreatment with a GLUT1-inhibitor showed an antagonistic effect, suggesting a concurrent uptake and therefore a Warburg effect targeting. The selected compounds exhibited most pronounced cytotoxic activity in DU145 cells as well as 22Rv1 cells. Non-malignant cells were generally less affected. The mode of action involves a loss of mitochondrial membrane potential, a release of cytochrome c and AIF into the cytosol and an upregulation of caspase-9, caspase-3 and cleaved PARP, as well as downregulation of Bcl-2 and Survivin, indicating that mitochondria are a major target, leading to the activation of the intrinsic apoptotic pathway. Early events in treated cells are ROS production and calcium release into the cytosol, a marker of ER-stress. Furthermore, downregulation of the AR and its signaling was observed on mRNA- and protein-level. In vivo experiments revealed antitumor activity in a 22Rv1-xenograft mouse model without severe side effects. Conclusions: In conclusion, we were able to identify two glucose-conjugated 1,4-naphthoquinones exhibiting potent in vitro and in vivoactivity and selectivity in human prostate cancer cells due to the Warburg effect targeting. Cytotoxic activity was exerted via initial ROS production and ER stress leading to mitochondrial damage and the induction of the intrinsic apoptotic pathway.
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Affiliation(s)
| | - Sergey Dyshlovoy
- Laboratory of Experimental Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Moritz Kaune
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Tobias Lange
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Udo Schumacher
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dmitry N Pelageev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Yurii E Sabutskii
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Ksenia Borisova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Victor Ph Anufriev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
| | - Markus Graefen
- Martini-Clinic, Prostate Cancer Center Hamburg, Hamburg, Germany
| | | | - Gunhild Von Amsberg
- Martini-Clinic, Prostate Cancer Center Hamburg and Department of Oncology, University Hospital Hamburg Eppendorf, Hamburg, Germany
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Dyshlovoy SA, Kaune M, Hauschild J, Kriegs M, Hoffer K, Busenbender T, Smirnova PA, Zhidkov ME, Poverennaya EV, Oh-Hohenhorst SJ, Spirin PV, Prassolov VS, Tilki D, Bokemeyer C, Graefen M, von Amsberg G. Efficacy and Mechanism of Action of Marine Alkaloid 3,10-Dibromofascaplysin in Drug-Resistant Prostate Cancer Cells. Mar Drugs 2020; 18:md18120609. [PMID: 33271756 PMCID: PMC7761490 DOI: 10.3390/md18120609] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/24/2020] [Accepted: 11/27/2020] [Indexed: 12/12/2022] Open
Abstract
Efficacy and mechanism of action of marine alkaloid 3,10-dibromofascaplysin (DBF) were investigated in human prostate cancer (PCa) cells harboring different levels of drug resistance. Anticancer activity was observed across all cell lines examined without signs of cross-resistance to androgen receptor targeting agents (ARTA) or taxane based chemotherapy. Kinome analysis followed by functional investigation identified JNK1/2 to be one of the molecular targets of DBF in 22Rv1 cells. In contrast, no activation of p38 and ERK1/2 MAPKs was observed. Inhibition of the drug-induced JNK1/2 activation or of the basal p38 activity resulted in increased cytotoxicity of DBF, whereas an active ERK1/2 was identified to be important for anticancer activity of the alkaloid. Synergistic effects of DBF were observed in combination with PARP-inhibitor olaparib most likely due to the induction of ROS production by the marine alkaloid. In addition, DBF intensified effects of platinum-based drugs cisplatin and carboplatin, and taxane derivatives docetaxel and cabazitaxel. Finally, DBF inhibited AR-signaling and resensitized AR-V7-positive 22Rv1 prostate cancer cells to enzalutamide, presumably due to AR-V7 down-regulation. These findings propose DBF to be a promising novel drug candidate for the treatment of human PCa regardless of resistance to standard therapy.
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Affiliation(s)
- Sergey A. Dyshlovoy
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (J.H.); (T.B.); (C.B.); (G.v.A.)
- Laboratory of Pharmacology, A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Palchevskogo str. 17, 690041 Vladivostok, Russian
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (S.J.O.-H.); (D.T.); (M.G.)
- School of Natural Sciences, Far Eastern Federal University, FEFU Campus, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russian; (P.A.S.); (M.E.Z.)
- Correspondence:
| | - Moritz Kaune
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (J.H.); (T.B.); (C.B.); (G.v.A.)
| | - Jessica Hauschild
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (J.H.); (T.B.); (C.B.); (G.v.A.)
| | - Malte Kriegs
- Department of Radiotherapy & Radiation Oncology, Hubertus Wald Tumorzentrum–University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (K.H.)
- UCCH Kinomics Core Facility, Hubertus Wald Tumorzentrum–University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany
| | - Konstantin Hoffer
- Department of Radiotherapy & Radiation Oncology, Hubertus Wald Tumorzentrum–University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (K.H.)
- UCCH Kinomics Core Facility, Hubertus Wald Tumorzentrum–University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany
| | - Tobias Busenbender
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (J.H.); (T.B.); (C.B.); (G.v.A.)
| | - Polina A. Smirnova
- School of Natural Sciences, Far Eastern Federal University, FEFU Campus, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russian; (P.A.S.); (M.E.Z.)
| | - Maxim E. Zhidkov
- School of Natural Sciences, Far Eastern Federal University, FEFU Campus, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russian; (P.A.S.); (M.E.Z.)
| | - Ekaterina V. Poverennaya
- Laboratory of Proteoform Interactomics, Institute of Biomedical Chemistry, Pogodinskaya str. 10/8, 119121 Moscow, Russian;
| | - Su Jung Oh-Hohenhorst
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (S.J.O.-H.); (D.T.); (M.G.)
- Institute of Anatomy and Experimental Morphology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Pavel V. Spirin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova 32, 119991 Moscow, Russian; (P.V.S.); (V.S.P.)
| | - Vladimir S. Prassolov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova 32, 119991 Moscow, Russian; (P.V.S.); (V.S.P.)
| | - Derya Tilki
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (S.J.O.-H.); (D.T.); (M.G.)
- Department of Urology, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany
| | - Carsten Bokemeyer
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (J.H.); (T.B.); (C.B.); (G.v.A.)
| | - Markus Graefen
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (S.J.O.-H.); (D.T.); (M.G.)
| | - Gunhild von Amsberg
- Laboratory of Experimental Oncology, Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (M.K.); (J.H.); (T.B.); (C.B.); (G.v.A.)
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Martinistrasse 52, 20251 Hamburg, Germany; (S.J.O.-H.); (D.T.); (M.G.)
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7
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Dyshlovoy SA, Pelageev DN, Hauschild J, Sabutskii YE, Khmelevskaya EA, Krisp C, Kaune M, Venz S, Borisova KL, Busenbender T, Denisenko VA, Schlüter H, Bokemeyer C, Graefen M, Polonik SG, Anufriev VP, von Amsberg G. Inspired by Sea Urchins: Warburg Effect Mediated Selectivity of Novel Synthetic Non-Glycoside 1,4-Naphthoquinone-6S-Glucose Conjugates in Prostate Cancer. Mar Drugs 2020; 18:md18050251. [PMID: 32403427 PMCID: PMC7281150 DOI: 10.3390/md18050251] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/03/2020] [Accepted: 05/05/2020] [Indexed: 02/07/2023] Open
Abstract
The phenomenon of high sugar consumption by tumor cells is known as Warburg effect. It results from a high glycolysis rate, used by tumors as preferred metabolic pathway even in aerobic conditions. Targeting the Warburg effect to specifically deliver sugar conjugated cytotoxic compounds into tumor cells is a promising approach to create new selective drugs. We designed, synthesized, and analyzed a library of novel 6-S-(1,4-naphthoquinone-2-yl)-d-glucose chimera molecules (SABs)—novel sugar conjugates of 1,4-naphthoquinone analogs of the sea urchin pigments spinochromes, which have previously shown anticancer properties. A sulfur linker (thioether bond) was used to prevent potential hydrolysis by human glycoside-unspecific enzymes. The synthesized compounds exhibited a Warburg effect mediated selectivity to human prostate cancer cells (including highly drug-resistant cell lines). Mitochondria were identified as a primary cellular target of SABs. The mechanism of action included mitochondria membrane permeabilization, followed by ROS upregulation and release of cytotoxic mitochondrial proteins (AIF and cytochrome C) to the cytoplasm, which led to the consequent caspase-9 and -3 activation, PARP cleavage, and apoptosis-like cell death. These results enable us to further clinically develop these compounds for effective Warburg effect targeting.
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Affiliation(s)
- Sergey A. Dyshlovoy
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (J.H.); (M.K.); (T.B.); (C.B.); (G.v.A.)
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
- School of Natural Sciences, Far Eastern Federal University, 690091 Vladivostok, Russia
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany;
- Correspondence: or ; Tel.: +4940-7410-53591
| | - Dmitry N. Pelageev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
- School of Natural Sciences, Far Eastern Federal University, 690091 Vladivostok, Russia
| | - Jessica Hauschild
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (J.H.); (M.K.); (T.B.); (C.B.); (G.v.A.)
| | - Yurii E. Sabutskii
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
| | - Ekaterina A. Khmelevskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
- School of Natural Sciences, Far Eastern Federal University, 690091 Vladivostok, Russia
| | - Christoph Krisp
- Institute of Clinical Chemistry and Laboratory Medicine, Mass Spectrometric Proteomics, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (C.K.); (H.S.)
| | - Moritz Kaune
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (J.H.); (M.K.); (T.B.); (C.B.); (G.v.A.)
| | - Simone Venz
- Department of Medical Biochemistry and Molecular Biology, University of Greifswald, 17489 Greifswald, Germany;
- Interfacultary Institute of Genetics and Functional Genomics, Department of Functional Genomics, University of Greifswald, 17489 Greifswald, Germany
| | - Ksenia L. Borisova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
| | - Tobias Busenbender
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (J.H.); (M.K.); (T.B.); (C.B.); (G.v.A.)
| | - Vladimir A. Denisenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
| | - Hartmut Schlüter
- Institute of Clinical Chemistry and Laboratory Medicine, Mass Spectrometric Proteomics, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (C.K.); (H.S.)
| | - Carsten Bokemeyer
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (J.H.); (M.K.); (T.B.); (C.B.); (G.v.A.)
| | - Markus Graefen
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany;
| | - Sergey G. Polonik
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
| | - Victor Ph. Anufriev
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-East Branch, Russian Academy of Sciences, 690022 Vladivostok, Russia; (D.N.P.); (Y.E.S.); (E.A.K.); (K.L.B.); (V.A.D.); (S.G.P.); (V.P.A.)
| | - Gunhild von Amsberg
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald-Tumorzentrum, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (J.H.); (M.K.); (T.B.); (C.B.); (G.v.A.)
- Martini-Klinik, Prostate Cancer Center, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany;
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