Aiming at the tumor-specific accumulation of MGMT-inhibitors: First description of a synthetic strategy towards inhibitor-peptide conjugates
In the therapy of cancer, alkylating agents are an efficient and often-used substance class. However, cells can repair the resulting alkyl modifications in the O-6-position of guanine using the repair protein methylguanine methyltransferase (MGMT), giving rise to resistance and inefficient therapy....
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 March 2020
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| In: |
Tetrahedron letters
Year: 2020, Jahrgang: 61, Heft: 19 |
| ISSN: | 1873-3581 |
| DOI: | 10.1016/j.tetlet.2020.151840 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.tetlet.2020.151840
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| Verfasserangaben: | Bjoern Waengler, Ralf Schirrmacher, Carmen Waengler |
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| 520 | |a In the therapy of cancer, alkylating agents are an efficient and often-used substance class. However, cells can repair the resulting alkyl modifications in the O-6-position of guanine using the repair protein methylguanine methyltransferase (MGMT), giving rise to resistance and inefficient therapy. A possibility to overcome this resistance is the use of MGMT inhibitors as adjuvants to alkylating therapies. However, MGMT inhibitors also sensitize healthy cells towards alkylating therapies. A strategy to circumvent this is the development of tumor-specific inhibitors which could be based on peptidic ligands as carriers. Such constructs would enable a receptor-specific uptake into tumors. Furthermore, the MGMT inhibitors could be adapted to the respective tumor entity by changing the peptide carrier. However, no peptide-based tumor-specific MGMT inhibitors were described so far. Thus, we have developed a synthetic strategy to obtain covalent conjugates of receptor-specific peptides and O-6-benzylguanine derivatives. As model compounds, the MGMT inhibitor O-6-(3-bromobenzyl)guanine and the receptor-specific peptides c (RGDfK), TATE, PESIN, neurotensin-2656 and minigastrin-9 were chosen and successfully assembled to obtain potentially tumor-specific MGMT inhibitors. Both, the O-6-(3-bromobenzyl)guanine as well as the peptide derivatives are easily replaceable during the syntheses to tailor peptide-based bioconjugates adaptable to the specific tumor entity. (C) 2020 Elsevier Ltd. All rights reserved. | ||
| 650 | 4 | |a Adjuvants to alkylating therapy | |
| 650 | 4 | |a alkyltransferase | |
| 650 | 4 | |a derivatives | |
| 650 | 4 | |a glucose transporters | |
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| 650 | 4 | |a MGMT inhibitor | |
| 650 | 4 | |a o-6-methylguanine-dna methyltransferase | |
| 650 | 4 | |a Peptide conjugates | |
| 650 | 4 | |a receptor | |
| 650 | 4 | |a Tumor targeting | |
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