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Kanaki Z, Voutsina A, Markou A, Markou A, Samaras I, Pateras I, Baliou E, Patsea E, Potaris K, Vahlas K, Toufektzian L, Vamvakaris I, Makrythanasis P, Georgoulias V, Kotsakis A, Klinakis A. 14P Studying tumour heterogeneity of primary non-small cell lung cancer in humans and mice (PDX). J Thorac Oncol 2021. [DOI: 10.1016/s1556-0864(21)01856-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Efentakis P, Varela A, Sanoudou D, Davos C, Klinakis A, Papapetropoulos A, Cokkinos DV, Iliodromitis EK, Wenzel P, Andreadou I. P3488Mechanistic insight on the cardioprotective effect of levosimendan against doxorubicin induced cardiomyopathy: Pivotal role of PKA signaling. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0356] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Levosimendan (LEVO) an inodilator indicated for the treatment of heart failure exerts multifaceted cardioprotective effects. Case-studies indicate protection against doxorubicin (DXR)-induced cardiotoxicity, but this effect remains elusive. We have previously shown that LEVO exerts cardioprotection against DXR-induced cardiomyopathy in a rat in vivo model, in a PKA/PKG-dependent manner.
Purpose
We sought to elucidate the mechanism of LEVO's induced cardioprotection and clarify the contribution of PKG and PKA pathways converging onto phospholamban (PLN).
Methods
As previously observed, LEVO at a dose of 24μg/kg protects against DXR cardiotoxicity, with protein kinase B (Akt)/ endothelial nitric oxide synthase (eNOS) and protein kinase A and G (PKA/PKG) pathways emerging as the main contributors to cardioprotection. Moreover, phospholamban seems to be the end-target of the signaling cascade. To verify the contribution of phospholamban, phospholamban deficient mice (PLN−/−) were assigned to PLN−/−/DXR (18mg/kg) and PLN−/−/DXR+LEVO (acute) (LEVO bolus, 24 μg/kg) groups for 14 days. Echocardiographic analysis was conducted in all groups and protocols. Furthermore, in order to solidify the mechanism of LEVO-mediated cardioprotection, primary adult ventricular murine cardiomyocytes (AVMCs) were isolated and treated with doxorubicin or/and LEVO as well with L-NAME, DT-2 and H-89 (eNOS, PKG and PKA inhibitors, respectively) and cardiomyocyte-toxicity was assessed.
Results
In the transgenic PLN−/− mice, LEVO did not exert cardioprotection, whilst the co-administration of doxorubicin and levosimendan led to an impaired Left ventricular function [FS (%): PLN−/−/Control: 39.01±0.42 vs PLN−/−/DXR: 38.12±0.51 in (NS); PLN−/−/DXR+LEVO: 35.38±0.86 (**p<0.01 vs PLN−/−/Control, *p<0.05 vs PLN−/−/DXR]. The latter data suggest that phospholamban is crucial for LEVO's cardioprotective effect. Finally, by investigating the contribution of different molecular pathways -shown to be induced by LEVO in vivo- on the AVMCs, we found that only PKA inhibition by H-89, abrogated LEVO-mediated cytoprotection, indicating that the effect is cAMP-PKA dependent.
Conclusions
Single-dose LEVO prevented DXR cardiotoxicity through a cAMP-PKA-phospholamban pathway, highlighting the role of inotropy in DXR cardiotoxicity. These preclinical data can stand as promising grounds for further clinical investigations.
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Affiliation(s)
- P Efentakis
- School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - A Varela
- Academy of Athens Biomedical Research Foundation, Athens, Greece
| | - D Sanoudou
- Academy of Athens Biomedical Research Foundation, Athens, Greece
| | - C Davos
- Academy of Athens Biomedical Research Foundation, Athens, Greece
| | - A Klinakis
- Academy of Athens Biomedical Research Foundation, Athens, Greece
| | - A Papapetropoulos
- School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - D V Cokkinos
- Academy of Athens Biomedical Research Foundation, Athens, Greece
| | - E K Iliodromitis
- 2nd Department of Cardiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - P Wenzel
- Center for Thrombosis and Hemostasis, Center of Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany
| | - I Andreadou
- School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
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Rampias T, Hoxhallari L, Avgeris M, Kanaki Z, Telios D, Giotakis E, Giotakis I, Scorilas A, Psyrri A, Klinakis A. Sensitizing HRAS overexpressing head and neck squamous cell carcinoma (HNSCC) to chemotherapy. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz252.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kremastiotis G, Efentakis P, Varela A, Davos CH, Papanagnou ED, Trougakos IP, Kastritis E, Kanaki Z, Iliodromitis EK, Klinakis A, Dimopoulos MA, Terpos E, Andreadou I. P4787Investigating the molecular mechanisms of carfilzomib-induced cardiotoxicity and the emerging role of metformin as a prophylactic therapy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- G Kremastiotis
- School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - P Efentakis
- School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - A Varela
- Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - C H Davos
- Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - E.-D Papanagnou
- Faculty of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - I P Trougakos
- Faculty of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - E Kastritis
- Department of Clinical Therapeutics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Z Kanaki
- Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - E K Iliodromitis
- 2nd Department of Cardiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - A Klinakis
- Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - M A Dimopoulos
- Department of Clinical Therapeutics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - E Terpos
- Department of Clinical Therapeutics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - I Andreadou
- School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
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Kremastiotis G, Efentakis P, Varela A, Davos C, Tsoumani M, Papanagnou E, Trougakos I, Kastritis E, Kanaki Z, Iliodromitis E, Klinakis A, Dimopoulos M, Terpos E, Andreadou I. The proteasome inhibitor carfilzomib (Cfz) induces cardiotoxicity in vivo: molecular mechanisms and the cardioprotective effect of metformin (Met). J Mol Cell Cardiol 2018. [DOI: 10.1016/j.yjmcc.2018.05.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Efentakis P, Iliodromitis E, Varela A, Chavdoula E, Sigala F, Kostomitsopoulos N, Farmakis D, Tasouli A, Papapetropoulos A, Klinakis A, Suter T, Cokkinos D, Andreadou I. P4229Acute treatment of levosimendan attenuates chronic doxorubicin-induced cardiomyopathy in vivo: implication of the critical role of inotropic action. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Patitsa M, Tziouni A, Kordatos K, Verganelakis D, Klinakis A. Development and optimization of magnetic nanoparticles for targeted therapy. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Koukidou M, Klinakis A, Reboulakis C, Zagoraiou L, Tavernarakis N, Livadaras I, Economopoulos A, Savakis C. Germ line transformation of the olive fly Bactrocera oleae using a versatile transgenesis marker. Insect Mol Biol 2006; 15:95-103. [PMID: 16469073 DOI: 10.1111/j.1365-2583.2006.00613.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The olive fruit fly (olive fly) Bactrocera oleae (Dacus), recently introduced in North America, is the most destructive pest of olives worldwide. The lack of an efficient gene transfer technology for olive fly has hampered molecular analysis, as well as development of genetic techniques for its control. We have developed a Minos-based transposon vector carrying a self-activating cassette which overexpresses the enhanced green fluorescent protein (EGFP). Efficient transposase-mediated integration of one to multiple copies of this vector was achieved in the germ line of B. oleae by coinjecting the vector along with in vitro synthesized Minos transposase mRNA into preblastoderm embryos. The self-activating gene construct combined with transposase mRNA present a system with potential for transgenesis of very diverse species.
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Affiliation(s)
- M Koukidou
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Heraklion, Crete, Greece
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Zafiropoulos A, Hatzidakis G, Mavrogiannis L, Klinakis A, Kandilogiannaki M, Krambovitis E. Retrieval of DNA sequences present at an extremely low frequency. Biotechniques 1997; 23:1104-9. [PMID: 9421644 DOI: 10.2144/97236rr02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We describe a method for retrieving sequences with one or two point mutations of a given target sequence, which are present in a DNA population at a frequency of 1 in 466 x 10(3) and 1 in 28 x 10(3) molecules, respectively. By stringent hybridization to a stable, chemically immobilized probe, a large excess of unrelated fragments is removed, and the bound sequences are dissociated and amplified. By repeating the hybridization-amplification cycles twice, we achieved an estimated enrichment of 404,000-fold and 1612-fold, respectively, which was confirmed by cloning the resultant products and sequencing 35 clones. This procedure can be applied to retrieve mutated sequences that exist at an extremely low frequency in a DNA population.
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Affiliation(s)
- A Zafiropoulos
- Institute of Molecular Biology and Biotechnology, Heraklion, Crete, Greece
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