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Updated: Mar 7, 2026
CD Spectroscopy to Study DNA-Protein Interactions
Published on: February 10, 2022
Exploring the Impact of Two DNA Minor Groove Binder Compounds on HCT-116 Cells: A Comprehensive Multiomics Analysis
Fatima M Al-Daffaie1,2, Ruba A Zenati1,2, Hasan Y Alniss1,2
1Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates.
Abstract:
Colorectal cancer (CRC) remains a major global health burden, necessitating innovative therapeutic approaches with improved selectivity and reduced toxicity. DNA minor groove binders (MGBs) represent a promising class of agents that modulate DNA-associated processes without inducing permanent DNA damage. In this study, two previously reported distamycin-like DNA minor groove binders, MGB30 and MGB32, were investigated to elucidate their molecular mechanisms of action in HCT-116 human colorectal cancer cells. An integrated multiomics approach combining metabolomics and proteomics was employed using TIMS-QTOF-UHPLC-MS. Four biological replicates were used for each treatment condition. Following MGB30 treatment, 12 metabolites and 187 proteins were significantly dysregulated, whereas MGB32 treatment resulted in alterations of 41 metabolites and 409 proteins using a Student's t-test with q-value <0.05. Pathway enrichment analysis revealed that both compounds significantly disrupted purine metabolism, while MGB32 additionally affected beta-alanine metabolism, glutathione metabolism, and spermidine and spermine biosynthesis. Proteomic analysis further demonstrated deactivation of RNA processing, translation, and ribosome biogenesis, leading to impaired protein synthesis and reduced cancer cell proliferation. This study provides mechanistic insights into the downstream molecular effects of MGB30 and MGB32 that disrupt key mechanisms underlying tumor growth, offering new avenues for CRC treatment.
Insights
Two DNA minor groove binders (MGBs), MGB30 and MGB32, were studied for their effects on colorectal cancer cells. They disrupt purine metabolism and protein synthesis, offering potential new treatments for colorectal cancer.
Area of Science:
- Molecular biology
- Cancer research
- Metabolomics and proteomics
Background:
- Colorectal cancer (CRC) is a significant global health challenge requiring novel therapies.
- DNA minor groove binders (MGBs) are a class of compounds that interact with DNA without causing permanent damage.
- Distamycin-like MGBs offer potential for targeted cancer treatment.
Purpose of the Study:
- To investigate the molecular mechanisms of action of MGB30 and MGB32 in human colorectal cancer cells (HCT-116).
- To elucidate the downstream effects of these MGBs on cellular metabolism and protein synthesis.
Main Methods:
- Utilized an integrated multiomics approach combining metabolomics and proteomics.
- Employed TIMS-QTOF-UHPLC-MS for high-resolution analysis.
- Analyzed four biological replicates per treatment condition.
Main Results:
- MGB30 altered 12 metabolites and 187 proteins; MGB32 altered 41 metabolites and 409 proteins (q-value <0.05).
- Both compounds disrupted purine metabolism; MGB32 also affected beta-alanine metabolism, glutathione metabolism, and spermidine/spermine biosynthesis.
- Proteomics revealed MGBs deactivated RNA processing, translation, and ribosome biogenesis, impairing protein synthesis and reducing cell proliferation.
Conclusions:
- MGB30 and MGB32 exhibit distinct molecular mechanisms in colorectal cancer cells.
- These MGBs disrupt critical metabolic pathways and protein synthesis, leading to reduced cancer cell proliferation.
- The findings provide mechanistic insights for developing novel MGB-based therapies for colorectal cancer.
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