- |||||||||| Triapine (3-AP) / Vion
Targeting RRM2 by triapine sensitizes glioblastoma to radiotherapy (Virtual Meeting II: E-Posters) - May 16, 2020 - Abstract #AACRII2020AACR-II_531; Our results demonstrate that RRM2 is overexpressed in glioblastoma and targeting RRM2 with triapine enhances radiation-induced DNA damage leading to radiosensitization of glioblastoma cells. Our findings suggest that triapine is a promising agent for the sensitization of glioblastoma to radiotherapy.
- |||||||||| Triapine (3-AP) / Vion
Effect of 3AP on neuroendocrine tumor cell proliferation, apoptosis and activation of DNA repair pathway (Virtual Meeting II: E-Posters) - May 16, 2020 - Abstract #AACRII2020AACR-II_525; Our results demonstrated rapid and dose dependent decrease in cyclin D1 expression after Triapine treatment, dose-dependent activation of DNA-PK, the key component of the non-homologous end joining pathway and significant increase in the radiosensitivity of each of the tumor cell lines. In conclusion, our findings provide a rationale for inclusion of Triapine as a radiosensitizer in combination with PRRT in treating NETs.
- |||||||||| Triapine (3-AP) / Vion
Improved activity and paraptosis-induction of anticancer thiosemicarbazones requires high copper(II) complex stability and slow reduction kinetics (Virtual Meeting II: E-Posters) - May 16, 2020 - Abstract #AACRII2020AACR-II_1295; Triapine, which is currently tested in a clinical phase III trial, is the best-studied thiosemicarbazone (TSC) for anticancer therapy...This intracellular stability of complexes, affects their mechanism of action as well as cell death induction. Overall, this study points out the importance of the redox parameters in order to understand and predict the TSC anticancer activity as well as their mechanism of action and, thereby, will pave the way for the development of improved anticancer agents.
- |||||||||| Triapine (3-AP) / Vion
Journal: Reactivity of Cu(ii)-, Zn(ii)- and Fe(ii)-thiosemicarbazone complexes with glutathione and metallothionein: from stability to dissociation to transmetallation. (Pubmed Central) - May 15, 2020 Herein, we study the complexes of copper(ii), zinc(ii) and iron(ii) with three TSCs, PT, 3-AP (triapine) and Dp44mT, (latter two are currently in clinical trials), concerning their reactivity with glutathione (GSH) and Zn7-metallothionein (Zn7MT-1, 2 and 3)...These results indicate that GSH and Zn7MT may be important factors in the fate of Cu(ii)- and Zn(ii)-TSCs. In particular, for Cu, its chemistry is complex, and these reactions may also occur for other families of Cu-complexes used in cancer treatment or for other applications.
- |||||||||| Triapine / Vion
Journal: Concentration of Fe(3+)-Triapine in BEAS-2B Cells. (Pubmed Central) - Jan 21, 2020 Here, it is shown that iron from purified Fe-transferrin is transferred to Triapine after the addition of ascorbate. To our knowledge, this is the first time that the EPR method has been used to determine the concentration of an iron antitumor agent in cells.
- |||||||||| Triapine / Vion
Journal: The thiosemicarbazone MeNNMe induces paraptosis by disrupting the ER thiol redox homeostasis based on protein disulfide isomerase inhibition. (Pubmed Central) - Dec 21, 2019 Due to their high biological activity, thiosemicarbazones have been developed for treatment of diverse diseases, including cancer, resulting in multiple clinical trials especially of the lead compound Triapine...Subsequently, we uncover that the copper complex of MeNNMe (a supposed intracellular metabolite) inhibits the ER-resident protein disulfide isomerase, resulting in a specific form of ER stress based on disruption of the Ca and ER thiol redox homeostasis. Our findings indicate that compounds like MeNNMe are of interest especially for the treatment of apoptosis-resistant cancer and provide new insights into mechanisms underlying drug-induced paraptosis.
- |||||||||| Triapine / Vion
Journal: New Water-Soluble Copper(II) Complexes with Morpholine-Thiosemicarbazone Hybrids: Insights into the Anticancer and Antibacterial Mode of Action. (Pubmed Central) - Oct 29, 2019 The lead proligands and Cu(II) complexes displayed higher antiproliferative activity in cancer cells than triapine...Insights into the processes controlling intracellular accumulation and mechanism of action were investigated for 2 and 5, including the role of ribonucleotide reductase (RNR) inhibition, endoplasmic reticulum (ER) stress induction and regulation of other cancer signaling pathways. Their ability to moderately inhibit R2 RNR protein in the presence of DTT is likely related to iron chelating properties of the proligands liberated upon reduction.
- |||||||||| Triapine / Vion
Journal: Ribonucleotide reductase subunit M2 as a novel target for clear-cell renal cell carcinoma. (Pubmed Central) - May 25, 2019 RRM2-siRNAs or Triapine significantly inhibited the cell growth by inducing G0/G1 cell cycle arrest in RCC cells through the attenuation of dNTP pool. The current results provided evidence that RRM2 might act as a novel target for ccRCC, and exploration of nonnucleoside, reversible, small-molecule inhibitors against RRM2 could be promising.
- |||||||||| Recentin (cediranib) / AstraZeneca, Triapine (3-AP) / Vion, Lynparza (olaparib) / Merck (MSD), AstraZeneca
Journal, BRCA Biomarker, PARP Biomarker: Combination of triapine, olaparib, and cediranib suppresses progression of BRCA-wild type and PARP inhibitor-resistant epithelial ovarian cancer. (Pubmed Central) - Apr 17, 2019 Furthermore, we identified that cediranib abrogated pro-survival and anti-apoptotic AKT signaling, thereby enhancing the efficacy of triapine and olaparib against BRCA-wild type EOC cells. Taken together, our results demonstrate a proof-of-principle approach and the combination regiment holds promise in treating BRCA-wild type and PARP inhibitor-resistant EOC.
- |||||||||| Triapine (3-AP) / Vion, Northwestern University
Phase classification, Enrollment change, Trial primary completion date, Combination therapy, Metastases: NRG-GY006: Testing the Addition of a New Anti-Cancer Drug, Triapine, to the Usual Chemotherapy Treatment (Cisplatin) During Radiation Therapy for Advanced-stage Cervical and Vaginal Cancers (clinicaltrials.gov) - Apr 9, 2019 P3, N=348, Recruiting, Taken together, our results demonstrate a proof-of-principle approach and the combination regiment holds promise in treating BRCA-wild type and PARP inhibitor-resistant EOC. Phase classification: P2 --> P3 | N=188 --> 348 | Trial primary completion date: Sep 2018 --> Jul 2023
- |||||||||| Triapine (3-AP) / Vion
Journal: Triapine Radiochemotherapy in Advanced Stage Cervical Cancer. (Pubmed Central) - Jun 7, 2018 P3 New trial results and review presented here suggest that a triapine-cisplatin-radiation combination may offer molecular cell cycle target control to maximize damage in cancers and to minimize injury to normal cells. A randomized trial now accrues patients with regionally advanced stage cervical cancer to evaluate triapine's contribution to clinical benefit after cisplatin-radiation (clinicaltrials.gov, NCT02466971).
- |||||||||| Triapine (3-AP) / Vion, Northwestern University
Trial initiation date, Trial suspension, Combination therapy, Metastases: NRG-GY006: Testing the Addition of a New Anti-Cancer Drug, Triapine, to the Usual Chemotherapy Treatment (Cisplatin) During Radiation Therapy for Advanced-stage Cervical and Vaginal Cancers (clinicaltrials.gov) - Jan 8, 2018 P2, N=188, Suspended, No abstract available Initiation date: Aug 2017 --> Jan 2016 | Recruiting --> Suspended
- |||||||||| Triapine (3-AP) / Vion
Journal: Phase I Trial of Triapine-Cisplatin-Paclitaxel Chemotherapy for Advanced Stage or Metastatic Solid Tumor Cancers. (Pubmed Central) - Apr 21, 2017 The combination regimen of triapine-cisplatin-paclitaxel resulted in no objective responses; however, five (83%) of six patients treated at the MTD had stable disease between 1 and 8 months duration. This phase I study showed that the combination regimen of triapine-cisplatin-paclitaxel was safe and provides a rational basis for a follow-up phase II trial to evaluate efficacy and progression-free survival in women with metastatic or recurrent uterine cervix cancer.
- |||||||||| Triapine (3-AP) / Vion
Trial suspension, Combination therapy, IO biomarker, Metastases: Triapine With Chemotherapy and Radiation Therapy in Treating Patients With IB2-IVA Cervical or Vaginal Cancer (clinicaltrials.gov) - Oct 28, 2016 P1, N=64, Suspended, This phase I study showed that the combination regimen of triapine-cisplatin-paclitaxel was safe and provides a rational basis for a follow-up phase II trial to evaluate efficacy and progression-free survival in women with metastatic or recurrent uterine cervix cancer. Recruiting --> Suspended
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