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Perryman R, Renziehausen A, Shaye H, Kostagianni A, Tsiailanis A, Thorne T, Chatziathanasiadou M, Sivolapenko G, El Mubarak MA, Han GW, Zarzycka B, Katritch V, Lebon G, Nigro CL, Lattanzio L, Morse S, Choi J, O’Neill K, Kanaki Z, Klinakis A, Crook T, Cherezov V, Tzakos A, Syed N. EXTH-14. INHIBITION OF THE ANGIOTENSIN II TYPE 2 RECEPTOR AT2R IS A NOVEL THERAPEUTIC STRATEGY FOR GLIOBLASTOMA. Neuro Oncol 2022. [PMCID: PMC9660637 DOI: 10.1093/neuonc/noac209.813] [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: 11/16/2022] Open
Abstract
Abstract
Glioblastoma (GBM) is a primary malignant brain tumor with poor clinical outcomes. Standard of care consists of surgical debulking followed by radiation and temozolomide, but the tumor invariably recurs, and median survival is only ~18 months. Repurposing drugs used for the treatment of other diseases is a promising avenue to identify novel treatments for this highly aggressive form of cancer. One such class of compounds is angiotensin II (AngII) receptor blockers, commonly used to control blood pressure. We show that ~80% of primary human GBM express the angiotensin II type 2 receptor (AT2R). In the presence of AngII, inhibition of AT2R using either PD123319 or EMA401 significantly inhibits GBM proliferation. This effect was lost in GBM cells with CRISPR/Cas9 mediated knockdown of AT2R. EMA401 inhibited invasion, angiogenesis, reduced GBM spheroid growth and induced apoptosis through caspase 3/7 activation. Furthermore, EMA401 induced changes in a number of growth regulatory pathways including apoptosis, DNA replication and focal adhesion. The crystal structure of AT2R bound to EMA401 revealed the receptor to be in an active-like conformation with helix-VIII blocking G protein or β-arrestin recruitment. We demonstrate that the architecture and interaction of EMA401 with AT2R differs drastically from complexes of AT2R with other compounds. Conjugation of EMA401 to angiopep-2 enhanced its blood brain barrier passage and reduced tumor volume in an orthotopic xenograft model of GBM. Targeting AT2R is a novel therapeutic strategy to treat GBM that should be explored in patients.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Gye Won Han
- University of Southern California , Los Angeles , USA
| | | | | | | | | | | | - Sophie Morse
- Imperial College London , London , United Kingdom
| | - James Choi
- Imperial College London , London , United Kingdom
| | | | - Zoe Kanaki
- Biomedical Research Foundation of the Academy of Athens , Athens , Greece
| | - Apostolos Klinakis
- Biomedical Research Foundation of the Academy of Athens , Athens , Greece
| | - Tim Crook
- Imperial College London , London , United Kingdom
| | | | | | - Nelofer Syed
- Imperial College London , London , United Kingdom
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Tsiailanis AD, Pateraki C, Kyriazou M, Chatzigiannis CM, Chatziathanasiadou M, Parisis N, Mandala I, Tzakos AG, Koutinas A. Chemical Profiling, Bioactivity Evaluation and the Discovery of a Novel Biopigment Produced by Penicillium purpurogenum CBS 113139. Molecules 2021; 27:molecules27010069. [PMID: 35011300 PMCID: PMC8746843 DOI: 10.3390/molecules27010069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/28/2021] [Accepted: 12/13/2021] [Indexed: 12/02/2022]
Abstract
Biobased pigments are environmentally friendly alternatives to synthetic variants with an increased market demand. Production of pigments via fermentation is a promising process, yet optimization of the production yield and rate is crucial. Herein, we evaluated the potential of Penicillium purpurogenum to produce biobased pigments. Optimum sugar concentration was 30 g/L and optimum C:N ratio was 36:1 resulting in the production of 4.1–4.5 AU (namely Pigment Complex A). Supplementation with ammonium nitrate resulted in the production of 4.1–4.9 AU (namely Pigment Complex B). Pigments showed excellent pH stability. The major biopigments in Pigment Complex A were N-threonyl-rubropunctamin or the acid form of PP-R (red pigment), N-GABA-PP-V (violet pigment), PP-O (orange pigment) and monascorubrin. In Pigment Complex B, a novel biopigment annotated as N-GLA-PP-V was identified. Its basic structure contains a polyketide azaphilone with the same carboxyl-monascorubramine base structure as PP-V (violet pigment) and γ-carboxyglutamic acid (GLA). The pigments were not cytotoxic up to 250 μg/mL.
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Affiliation(s)
- Antonis D. Tsiailanis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (A.D.T.); (C.M.C.); (M.C.); (N.P.)
| | - Chrysanthi Pateraki
- Department of Food Science and Human Nutrition, Agricultural University of Athens, 118 55 Athens, Greece; (C.P.); (M.K.); (I.M.)
| | - Mary Kyriazou
- Department of Food Science and Human Nutrition, Agricultural University of Athens, 118 55 Athens, Greece; (C.P.); (M.K.); (I.M.)
| | - Christos M. Chatzigiannis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (A.D.T.); (C.M.C.); (M.C.); (N.P.)
| | - Maria Chatziathanasiadou
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (A.D.T.); (C.M.C.); (M.C.); (N.P.)
| | - Nikolaos Parisis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (A.D.T.); (C.M.C.); (M.C.); (N.P.)
- Biomedical and Analytical Center (BAC), Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece
| | - Ioanna Mandala
- Department of Food Science and Human Nutrition, Agricultural University of Athens, 118 55 Athens, Greece; (C.P.); (M.K.); (I.M.)
| | - Andreas G. Tzakos
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (A.D.T.); (C.M.C.); (M.C.); (N.P.)
- Biomedical and Analytical Center (BAC), Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece
- Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), 451 10 Ioannina, Greece
- Correspondence: (A.G.T.); (A.K.); Tel./Fax: +30-2105294729 (A.K.)
| | - Apostolis Koutinas
- Department of Food Science and Human Nutrition, Agricultural University of Athens, 118 55 Athens, Greece; (C.P.); (M.K.); (I.M.)
- Correspondence: (A.G.T.); (A.K.); Tel./Fax: +30-2105294729 (A.K.)
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Kellici TF, Ntountaniotis D, Leonis G, Chatziathanasiadou M, Chatzikonstantinou AV, Becker-Baldus J, Glaubitz C, Tzakos AG, Viras K, Chatzigeorgiou P, Tzimas S, Kefala E, Valsami G, Archontaki H, Papadopoulos MG, Mavromoustakos T. Investigation of the Interactions of Silibinin with 2-Hydroxypropyl-β-cyclodextrin through Biophysical Techniques and Computational Methods. Mol Pharm 2015; 12:954-65. [DOI: 10.1021/mp5008053] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Tahsin F. Kellici
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografou 15771, Greece
- Department
of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Dimitrios Ntountaniotis
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografou 15771, Greece
| | - Georgios Leonis
- Institute
of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vas. Constantinou Avenue, 11635 Athens, Greece
| | | | | | - Johanna Becker-Baldus
- Institute
of Biophysical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str.
9, 60438 Frankfurt, Germany
| | - Clemens Glaubitz
- Institute
of Biophysical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str.
9, 60438 Frankfurt, Germany
| | - Andreas G. Tzakos
- Department
of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Kyriakos Viras
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografou 15771, Greece
| | - Petros Chatzigeorgiou
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografou 15771, Greece
| | - Stavros Tzimas
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografou 15771, Greece
| | - Evangelia Kefala
- Department
of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou 15771, Greece
| | - Georgia Valsami
- Department
of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou 15771, Greece
| | - Helen Archontaki
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografou 15771, Greece
| | - Manthos G. Papadopoulos
- Institute
of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vas. Constantinou Avenue, 11635 Athens, Greece
| | - Thomas Mavromoustakos
- Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografou 15771, Greece
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Korpetinou A, Prodromaki E, Chatziathanasiadou M, Giannopoulou E, Sarantitis I, Papadaki H, Papachristou D, Kalofonos H. 1042 POSTER Expression of the Ribonucleases Drosha, Dicer and Ago2, Major Constituents of the MicroRNa Machinery, in Human Non-small Cell Lung Carcinomas. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)70685-2] [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: 10/17/2022]
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