Related Experiment Video
Updated: Jul 8, 2025

Preparation of Primary Acute Lymphoblastic Leukemia Cells in Different Cell Cycle Phases by Centrifugal Elutriation
Published on: November 10, 2017
Synthetic 1,2,4-triazole-3-carboxamides Induce Cell Cycle Arrest and Apoptosis in Leukemia Cells
Zhidkova Ekaterina1, Stepanycheva Daria2, Grebenkina Lyubov2
1Department of Chemical Carcinogenesis, N.N. Blokhin Russian Cancer Research Center, Ministry of Health of Russia, 24 Kashirskoe Shosse, Moscow 115478, Russia.
Background:
A number of studies demonstrate the efficacy of ribavirin against various cancer types in in vitro and in vivo models. However, ribavirin induces the development of multiple side effects, suggesting a high demand for ribavirin analogues with improved therapeutic indexes.
Objective:
This study was focused on the analysis of ribavirin, its aglycon 1,2,4-triazole-3-carboxamide, and several of its derivatives activities in blood cancer cells in vitro.
Methods:
Four 1,2,4-triazole-3-carboxamide derivatives were designed and synthesized. Antiproliferative effects were evaluated in chronic myeloid leukemia cells К562 and acute lymphoblastic leukemia cells CCRF-SB as well as in the cells of whole blood mononuclear fraction of healthy volunteers by cell counting using the trypan blue exclusion method. Cell cycle distribution and apoptosis under the influence of the compounds were analyzed by flow cytometry with PI staining, and then apoptosis data were confirmed by Western blot analysis for PARP1 and caspase-3 cleavage.
Results:
We demonstrated the significant antiproliferative effect of 5-(tetrahydropyran-2-yl)-1,2,4-triazole-3- carboxamide and 1-(tetrahydropyran-2-yl)-1,2,4-triazol-3-carboxamide in leukemia cell lines in vitro in comparison to non-transformed monocytes, providing the rationale for further studies of 1,2,4-triazole-3-carboxamide derivatives as anti-leukemia drugs.
Conclusion:
These results implied that the 1,2,4-triazole-3-carboxamide derivatives exhibited their antiproliferative activities by induction of cell cycle arrest. Consequently, 5-(tetrahydropyran-2-yl)-1,2,4-triazole-3-carboxamide and 1-(tetrahydrofuran-2-yl)-1,2,4-triazol-3-carboxamide may present antimetabolites with potential anticancer efficacy.
Insights
New ribavirin analogues, 1,2,4-triazole-3-carboxamide derivatives, show significant antiproliferative effects against leukemia cells. These compounds may offer a promising alternative for cancer therapy with fewer side effects.
Area of Science:
- Medicinal Chemistry
- Cancer Biology
- Pharmacology
Background:
- Ribavirin demonstrates anticancer efficacy in preclinical models but causes significant side effects.
- There is a need for novel ribavirin analogues with improved therapeutic indices.
Purpose of the Study:
- To synthesize and evaluate the antiproliferative activity of 1,2,4-triazole-3-carboxamide derivatives against leukemia cells.
- To investigate the mechanism of action, including cell cycle arrest and apoptosis induction.
Main Methods:
- Synthesis of four 1,2,4-triazole-3-carboxamide derivatives.
- In vitro antiproliferative assays using K562 and CCRF-SB leukemia cell lines and healthy volunteer monocytes.
- Cell cycle analysis and apoptosis assessment via flow cytometry and Western blotting.
Main Results:
- Two derivatives, 5-(tetrahydropyran-2-yl)-1,2,4-triazole-3-carboxamide and 1-(tetrahydropyran-2-yl)-1,2,4-triazol-3-carboxamide, exhibited significant antiproliferative effects on leukemia cells.
- These effects were more pronounced in leukemia cells compared to non-transformed monocytes.
Conclusions:
- 1,2,4-triazole-3-carboxamide derivatives demonstrate potent antiproliferative activity against leukemia cells.
- The compounds induce cell cycle arrest, suggesting their potential as antimetabolites for anticancer therapy.
Related Concept Videos
Combination Therapies and Personalized Medicine
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Targeted Cancer Therapies
There are several types of targeted therapies against...
Inhibition of Cdk Activity
Drugs that Destabilize Microtubules
Treatment Resistant Cancers
Drugs that Stabilize Microtubules

