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Martínez SR, Bosch-Barrera J, Planas M, Feliu L, Porta-Balanya R, Puig T. 65P Fatty acid synthase (FASN) inhibition effect on EGFR TKIs sensitive and resistant cells. J Thorac Oncol 2018. [DOI: 10.1016/s1556-0864(18)30341-1] [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: 11/16/2022]
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Soler M, González-Bártulos M, Figueras E, Massaguer A, Feliu L, Planas M, Ribas X, Costas M. Delivering aminopyridine ligands into cancer cells through conjugation to the cell-penetrating peptide BP16. Org Biomol Chem 2018; 14:4061-70. [PMID: 27055538 DOI: 10.1039/c6ob00470a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Peptide conjugates incorporating the N-based ligands (Me2)PyTACN or (S,S')-BPBP at the N- or the C-terminus of the cell-penetrating peptide were synthesized (PyTACN-BP16 (), BP16-PyTACN (), BPBP-BP16 (), and BP16-BPBP ()). Metal binding peptides bearing at the N-terminus the ligand, an additional Lys and a β-Ala were also prepared (PyTACN-βAK-BP16 () and BPBP-βAK-BP16 ()). Moreover, taking into account the clathrin-dependent endocytic mechanism of , the enzymatic cleavable tetrapeptide Gly-Phe-Leu-Gly was incorporated between the ligand and the N- or C-terminus of (BPBP-GFLG-BP16 () and BP16-GLFG-BPBP ()). Analysis of the cytotoxicity of all the peptide conjugates showed that: (i) the position of the ligand influenced the IC50 values, (ii) the incorporation of the βAla-Lys dipeptide rendered non active sequences, (iii) peptide conjugates derived from the (S,S')-BPBP ligand were more active than those bearing (Me2)PyTACN, and (iv) the introduction of the cleavable tetrapeptide significantly enhanced the activity of the BPBP conjugates (IC50 of 4.3 to 11.7 μM ( and ) compared to 26.0 to >50 μM (, and )). The most active peptide was BPBP-GFLG-BP16 () (IC50 of 4.3 to 5.0 μM). This high activity was attributed to its high internalization in MCF-7 cells, as shown by flow cytometry, and to the subsequent release of the ligand by the intracellular cleavage of the enzyme-labile spacer, as observed in cathepsin B enzymatic assays. Therefore, these results pave the way for the design of novel peptide conjugates to be used in pro-oxidant anticancer therapies.
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Affiliation(s)
- M Soler
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain. and LIPPSO, Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
| | - M González-Bártulos
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain. and Departament de Biologia, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
| | - E Figueras
- LIPPSO, Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
| | - A Massaguer
- Departament de Biologia, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
| | - L Feliu
- LIPPSO, Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
| | - M Planas
- LIPPSO, Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
| | - X Ribas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
| | - M Costas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
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Pombo M, Feliu L, Martínez-Sapiña MJ, Martínez MD, Alvez F, Iglesias-Diz JL, Devesa J, Bravo M, Pereira J, Tojo T. [Effect of bromocrytine on the secretion of thyrotropic hormone and growth hormone (author's transl)]. An Esp Pediatr 1980; 13:497-502. [PMID: 6774646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The normal stimulatory response that the TRH has on the TSH in children, is inhibited by the previous administration of bromocryptine (p less than 0.05). Under the same circumstances there was a significant increase in the release of the GH.
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