Ignite Creation Date:
2024-05-05 @ 8:04 PM
Last Modification Date:
2024-10-26 @ 9:58 AM
Study NCT ID:
NCT00797238
Status:
UNKNOWN
Last Update Posted:
2010-07-15
First Post:
2008-07-09
Brief Title:
DNA Repair Genes and Outcomes in Patients With Stage III NSCLC
Sponsor:
National Taiwan University Hospital
Organization:
National Taiwan University Hospital
Study Overview
Official Title:
None
Status:
UNKNOWN
Status Verified Date:
2010-07
Last Known Status:
RECRUITING
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
The studied materials contains surgically specimens of two groups of patiens with non-small cell lung cancer who have received two regimens of induction neoadjuvant chemotherapy before tumor resection Pathological specimens of pre-chemotherapy and post-chemotherapy whatever retrievable will be collected The protein ad RNA expression of DNA repair genes ERCC1 ERCC2 XRCC1 XRCC3 BRCA1 and RRM1 as well as DNA polymorphisms of these genes will be studied and will be correlate with the treatment response and outcome of the patients The aims of this study include
1 To identify the expression status of the above DNA repair genes in Taiwanese NSCLC patients
2 To correlate the expression as well as DNA polymorphism of each DNA repair gene in treatment response to two differenct chemotherapeutic regimens
3 To correlate the expression as well as DNA polymorphism of each DNA repair gene in the outcome of stage III NSCLC patients
4 To explore whether platinum based chemotherapy will change the expression status of DNA repair gene and if indeed changed whether this would influence the outcome of the patients
1 To identify the expression status of the above DNA repair genes in Taiwanese NSCLC patients
2 To correlate the expression as well as DNA polymorphism of each DNA repair gene in treatment response to two differenct chemotherapeutic regimens
3 To correlate the expression as well as DNA polymorphism of each DNA repair gene in the outcome of stage III NSCLC patients
4 To explore whether platinum based chemotherapy will change the expression status of DNA repair gene and if indeed changed whether this would influence the outcome of the patients
Detailed Description:
Patients with clinical stage IIIA N2 non-small cell lung cancer NSCLC have a 5-year survival rate of 10 to 15 much worse than those of earlier stages of disease The use of pre-operative neo-adjuvant chemotherapy has been shown to be beneficial in several studies1 However the precise chemotherapeutic regimen for neoadjuvant therapy remains an open question
The treatment response and toxicity of chemotherapy vary widely among and within individuals and races Recently molecular predictive markers may help to identify who may benefit from individual therapy Many evidence shows that the level of ERCC1 an excision nuclease within the nucleotide excision repair pathway is important for the repair of platinum-DNA adducts and the response to platinum-based chemotherapy2-5 Not only by measuring protein and mRNA expression studies addressed on the polymorphism of ERCC1118 CT and C8092A had demonstrated impact on survival of chemotherapy-treated NSCLC patients67 XPDERCC2 xeroderma pigmentosum group Dexcision repair cross-complementing group 2 8 XRCC1 X-ray repair cross-complementing group 1 and XRCC3 X-ray repair cross-complementing group 3 are another three proteins involving NER serving as prognostic factor of survival9 BRCA1 is a protein participating in recombinant repair RR and is stronge predictive marker of chemotherapy response BRCA1 functions as a differential modulator of survival with cisplatin and antimicrotubule drugs paclitaxel docetaxel and vinorelbine Low level of BRCA1 enhance cisplatin activity but lead to resistance to paclitaxel docetaxel and vinorelbine whereas the opposite phenomenon is observed in the presence of normal or high levels of BRCA1 In contract BRCA1 levels do not influence the effect of gemcitabine10 On the contrary RRM1 ribonucleotid reductase subunit M1 is involved in gemcitabine metabolism and DNA repair after chemotherapy damage and increased RRM1 mRNA expression has been related to gemcitabine resistance in NSCLC11 All these DNA repair genes participate the pathogenesis mechanism of chemotherapeutic resistance and outcome of lung cancer patients
Previously a joint study done by NTUH and VGH Taipei used gemcitabine and cisplatin as induction chemotherapy to treat 52 patient with stage III NSCLC 36 were operable and 18 were completely resected12 From 2004 till now a prospective study has been performed in NTUH using docetaxel and cisplatin as neoadjuvant regimen to treat patients with stage IIIA N2 non-small cell lung cancer Up to now more than 40 patients were enrolled all of them have received tumor sampling before chemotherapy and more 90 received operation with their tumor resected The tissue specimens are valuable as all these patients had received protocolized treatment with filed detailed clinical information collected systematically All the peroperative biopsied and operatively resected tumor tissues are available in paffin-embedded block some in frozen tissue stock we plan to study the DNA polymorphism protein and RNA expression of the above-mentioned DNA repair genes in these two series of patients
The treatment response and toxicity of chemotherapy vary widely among and within individuals and races Recently molecular predictive markers may help to identify who may benefit from individual therapy Many evidence shows that the level of ERCC1 an excision nuclease within the nucleotide excision repair pathway is important for the repair of platinum-DNA adducts and the response to platinum-based chemotherapy2-5 Not only by measuring protein and mRNA expression studies addressed on the polymorphism of ERCC1118 CT and C8092A had demonstrated impact on survival of chemotherapy-treated NSCLC patients67 XPDERCC2 xeroderma pigmentosum group Dexcision repair cross-complementing group 2 8 XRCC1 X-ray repair cross-complementing group 1 and XRCC3 X-ray repair cross-complementing group 3 are another three proteins involving NER serving as prognostic factor of survival9 BRCA1 is a protein participating in recombinant repair RR and is stronge predictive marker of chemotherapy response BRCA1 functions as a differential modulator of survival with cisplatin and antimicrotubule drugs paclitaxel docetaxel and vinorelbine Low level of BRCA1 enhance cisplatin activity but lead to resistance to paclitaxel docetaxel and vinorelbine whereas the opposite phenomenon is observed in the presence of normal or high levels of BRCA1 In contract BRCA1 levels do not influence the effect of gemcitabine10 On the contrary RRM1 ribonucleotid reductase subunit M1 is involved in gemcitabine metabolism and DNA repair after chemotherapy damage and increased RRM1 mRNA expression has been related to gemcitabine resistance in NSCLC11 All these DNA repair genes participate the pathogenesis mechanism of chemotherapeutic resistance and outcome of lung cancer patients
Previously a joint study done by NTUH and VGH Taipei used gemcitabine and cisplatin as induction chemotherapy to treat 52 patient with stage III NSCLC 36 were operable and 18 were completely resected12 From 2004 till now a prospective study has been performed in NTUH using docetaxel and cisplatin as neoadjuvant regimen to treat patients with stage IIIA N2 non-small cell lung cancer Up to now more than 40 patients were enrolled all of them have received tumor sampling before chemotherapy and more 90 received operation with their tumor resected The tissue specimens are valuable as all these patients had received protocolized treatment with filed detailed clinical information collected systematically All the peroperative biopsied and operatively resected tumor tissues are available in paffin-embedded block some in frozen tissue stock we plan to study the DNA polymorphism protein and RNA expression of the above-mentioned DNA repair genes in these two series of patients
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None