Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy?
<p>Abstract</p> <p>Background</p> <p>Transcriptome analysis shows that the chemotherapy innate resistance state of tumors is characterized by: poorly dividing tumor cells; an increased DNA repair; an increased drug efflux potential by ABC-transporters; and a dysfunction...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2006-07-01
|
| Series: | Molecular Cancer |
| Online Access: | http://www.molecular-cancer.com/content/5/1/27 |
| _version_ | 1818582396344205312 |
|---|---|
| author | Duenas-Gonzalez Alfonso Perez-Plasencia Carlos |
| author_facet | Duenas-Gonzalez Alfonso Perez-Plasencia Carlos |
| author_sort | Duenas-Gonzalez Alfonso |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Transcriptome analysis shows that the chemotherapy innate resistance state of tumors is characterized by: poorly dividing tumor cells; an increased DNA repair; an increased drug efflux potential by ABC-transporters; and a dysfunctional ECM. Because chemotherapy resistance involves multiple genes, epigenetic-mediated changes could be the main force responsible of this phenotype. Our hypothesis deals with the potential role of epigenetic therapy for affecting the chemotherapy resistant phenotype of malignant tumors.</p> <p>Presentation of the hypothesis</p> <p>Recent studies reveal the involvement of DNA methylation and histone modifications in the reprogramming of the genome of mammalian cells in cancer. In this sense, it can be hypothesized that epigenetic reprogramming can participate in the establishment of an epigenetic mark associated with the chemotherapy resistant phenotype. If this were correct, then it could be expected that agents targeting DNA methylation and histone deacetylation would by reverting the epigenetic mark induce a global expression profile that mirror the observed in untreated resistant cells.</p> <p>Testing the hypothesis</p> <p>It is proposed to perform a detailed analysis using all the available databases where the gene expression of primary tumors was analyzed and data correlated with the therapeutic outcome to determine whether a transcriptome profiling of "resistance" is observed. Assuming an epigenetic programming determines at some level the intrinsic resistant phenotype, then a similar pattern of gene expression dictated by an epigenetic mark should also be found in cell acquiring drug resistance. If these expectations are meet, then it should be further investigated at the genomic level whether these phenotypes are associated to certain patterns of DNA methylation and chromatin modification. Once confirmed the existence of an epigenetic mark associated to either the intrinsic or acquired chemotherapy resistant phenotype, then a causal association should be investigated. These preclinical findings should also be tested in a clinical setting.</p> <p>Implications of the hypothesis</p> <p>Our hypothesis on the ability of epigenetic therapy to revert the epigenetic changes leading to a transcritome profile that defines the resistant state will eventually be a more rational and effective way to treat malignant tumors.</p> |
| first_indexed | 2024-12-16T07:48:43Z |
| format | Article |
| id | doaj.art-547b7cc858274211b387d3cb4d66a513 |
| institution | Directory Open Access Journal |
| issn | 1476-4598 |
| language | English |
| last_indexed | 2024-12-16T07:48:43Z |
| publishDate | 2006-07-01 |
| publisher | BMC |
| record_format | Article |
| series | Molecular Cancer |
| spelling | doaj.art-547b7cc858274211b387d3cb4d66a5132022-12-21T22:38:54ZengBMCMolecular Cancer1476-45982006-07-01512710.1186/1476-4598-5-27Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy?Duenas-Gonzalez AlfonsoPerez-Plasencia Carlos<p>Abstract</p> <p>Background</p> <p>Transcriptome analysis shows that the chemotherapy innate resistance state of tumors is characterized by: poorly dividing tumor cells; an increased DNA repair; an increased drug efflux potential by ABC-transporters; and a dysfunctional ECM. Because chemotherapy resistance involves multiple genes, epigenetic-mediated changes could be the main force responsible of this phenotype. Our hypothesis deals with the potential role of epigenetic therapy for affecting the chemotherapy resistant phenotype of malignant tumors.</p> <p>Presentation of the hypothesis</p> <p>Recent studies reveal the involvement of DNA methylation and histone modifications in the reprogramming of the genome of mammalian cells in cancer. In this sense, it can be hypothesized that epigenetic reprogramming can participate in the establishment of an epigenetic mark associated with the chemotherapy resistant phenotype. If this were correct, then it could be expected that agents targeting DNA methylation and histone deacetylation would by reverting the epigenetic mark induce a global expression profile that mirror the observed in untreated resistant cells.</p> <p>Testing the hypothesis</p> <p>It is proposed to perform a detailed analysis using all the available databases where the gene expression of primary tumors was analyzed and data correlated with the therapeutic outcome to determine whether a transcriptome profiling of "resistance" is observed. Assuming an epigenetic programming determines at some level the intrinsic resistant phenotype, then a similar pattern of gene expression dictated by an epigenetic mark should also be found in cell acquiring drug resistance. If these expectations are meet, then it should be further investigated at the genomic level whether these phenotypes are associated to certain patterns of DNA methylation and chromatin modification. Once confirmed the existence of an epigenetic mark associated to either the intrinsic or acquired chemotherapy resistant phenotype, then a causal association should be investigated. These preclinical findings should also be tested in a clinical setting.</p> <p>Implications of the hypothesis</p> <p>Our hypothesis on the ability of epigenetic therapy to revert the epigenetic changes leading to a transcritome profile that defines the resistant state will eventually be a more rational and effective way to treat malignant tumors.</p>http://www.molecular-cancer.com/content/5/1/27 |
| spellingShingle | Duenas-Gonzalez Alfonso Perez-Plasencia Carlos Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy? Molecular Cancer |
| title | Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy? |
| title_full | Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy? |
| title_fullStr | Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy? |
| title_full_unstemmed | Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy? |
| title_short | Can the state of cancer chemotherapy resistance be reverted by epigenetic therapy? |
| title_sort | can the state of cancer chemotherapy resistance be reverted by epigenetic therapy |
| url | http://www.molecular-cancer.com/content/5/1/27 |
| work_keys_str_mv | AT duenasgonzalezalfonso canthestateofcancerchemotherapyresistanceberevertedbyepigenetictherapy AT perezplasenciacarlos canthestateofcancerchemotherapyresistanceberevertedbyepigenetictherapy |