Correlation between topoisomerase I and tyrosyl-DNA phosphodiesterase 1 activities in non-small cell lung cancer tissue
| Autor: | Ann-Katrine Jakobsen, Joanna Proszek, Magnus Stougaard, Henrik Hager, Birgitta R. Knudsen, Evelyn Benuja Samuel, Kristina Lystlund Lauridsen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
DNA Replication
DNA damage Clinical Biochemistry Biosensing Techniques Phosphoric Diester Hydrolases/metabolism Sensitivity and Specificity Pathology and Forensic Medicine Carcinoma Non-Small-Cell Lung medicine Carcinoma Non-Small-Cell Lung/enzymology Cryosection Humans Nanotechnology Lung cancer Molecular Biology biology Phosphoric Diester Hydrolases Topoisomerase DNA replication Phosphodiesterase Tyrosyl-DNA Phosphodiesterase 1 medicine.disease Molecular biology DNA Topoisomerases Type I/metabolism Topoisomerase I Lung cancer Topoisomerase I Tyrosyl-DNA phosphodiesterase 1 Biosensor Cryosection STRAND BREAK REPAIR SPINOCEREBELLAR ATAXIA COVALENT COMPLEXES AXONAL NEUROPATHY COLON-CANCER TDP1 DAMAGE CAMPTOTHECIN TOPOTECAN MUTATION DNA Topoisomerases Type I biology.protein Cancer research Tyrosyl-DNA phosphodiesterase 1 Camptothecin TDP1 Biosensor medicine.drug DNA Damage |
| Zdroj: | Jakobsen, A-K, Lauridsen, K L, Samuel, E B, Proszek, J, Knudsen, B R, Hager, H & Stougaard, M 2015, ' Correlation between topoisomerase I and tyrosyl-DNA phosphodiesterase 1 activities in non-small cell lung cancer tissue ', Experimental and Molecular Pathology, vol. 99, no. 1, pp. 56-64 . https://doi.org/10.1016/j.yexmp.2015.05.006 |
| Popis: | Topoisomerase I (TOP1) regulates DNA topology during replication and transcription whereas tyrosyl-DNA phosphodiesterase 1 (TDP1) is involved in the repair of several types of DNA damages, including damages from defective TOP1 catalysis. TOP1 is the target of chemotherapeutic drugs of the camptothecin family (CPT). TDP1 has in cell line based assays been shown to counteract the effect of CPT. We have quantified the enzymatic activities of TOP1 and TDP1 in paired (tumor and adjacent non-tumor) samples from non-small cell lung cancer (NSCLC) patients and show that in NSCLC TOP1 and TDP1 activities are significantly upregulated in the tumor tissue. Furthermore, we found a positive correlation between the TDP1 activity and the tumor percentage (TOP1 activity did not correlate with the tumor percentage) as well as between the activities of TOP1 and TDP1 both within the tumor and the non-tumor group. That TDP1 activity was upregulated in all tumor samples and correlated with the tumor percentage suggest that it must play a highly important function in NSCLC. This could be to protect against TOP1 mediated DNA damage as the activity of TOP1 likewise was upregulated in the majority of tumor samples and correlated positively to the TDP1 activity. Regardless, the finding that the TOP1 and TDP1 activities are upregulated and correlate positively suggests that combinatorial treatment targeting both activities could be advantageous in NSCLC. |
| Databáze: | OpenAIRE |
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