Clinicopathological Features of NSCLC Patients Associated With the Chromosome 2p (EML4-ALK)

NCT ID: NCT01662635

Last Updated: 2019-01-09

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 230 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2011-02-28
• Study Completion Date: 2014-09-30

Brief Summary

Because ALK-positive lung cancer constitutes less than 5% of all lung cancers, it is critically important to select those patients who are more likely to have the ALK mutation. Clinical characteristics of patients with mutations in the target gene should also be known, so that the incidence of a given target mutation is established in a specific population. There is not incidence known in Mexican population, but it is believed it is greater.

Detailed Description

Lung adenocarcinoma studies. The only inclusion criterion was the availability of tissue for biomarker studies. To identify ALK rearrangements, fluorescence in situ hybridization (FISH) studies were performed on 3 to 4 mm thick paraffin sections from NSCLCs. The commercially labeled Vysis LSI ALK Dual Color (split-apart), break-apart rearrangement probe (Abbott Molecular, Abbott Park, IL) was used to detect any rearrangement involving the ALK gene. The probe hybridizes to band 2p23, on either side of the ALK gene breakpoint. Criteria for probe signal interpretation in at least 200 interphase nuclei were as follow: 1) separated green and orange signals or single red signals identified cells with rearranged ALK; 2) overlapping of red and green signals (yellowish) indicated cells in which ALK was not rearranged.

FISH-positive samples for ALK rearrangement were defined as having cells with a clearly separated pair of probe signals, or with >15% of cells having loss of the 5´(centromeric) probe. The higher threshold for loss is necessary because parts of probes can be lost during sectioning.

The aim of our study is to evaluate the utility of IHC with 5A4 and RT-qPCR in the detection of ALK rearrangements in NSCLC compared with the current method of choice, FISH. Further, we report on the demographics, and clinicopathologic features of ALK-rearranged NSCLC in a Latin-American population.

Clinical details of these patients were included in a database. Further results will be analyzed with the program SPSS17

Conditions

Non Small-cell Lung Cancer

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: CROSS_SECTIONAL

Study Groups

ALK-BREAK APART

We reviewed 230 consecutive cases of NSCLC that were retrieved from oncologic molecular laboratory and diagnostic pathology unit at the Instituto Nacional de Cancerologia, Mexico city, between 2011 and 2014. Samples were sent to the unit of pathological anatomy, a Pathologist confirmed the histologic diagnosis. The only inclusion criterion was the availability of tissue for biomarker studies. Clinical and pathologic details of these patients were included in a database, obtained from medical records.

For ALK fusion testing, we applied dual-color, break-apart FISH, RT-qPCR, and immunohistochemistry. Interpretation of the results was done in double-blind manner without knowing the results by other methods.

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

• The only inclusion criterion was the availability of tissue for biomarker studies.

Exclusion Criteria

• Disease Progression

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Instituto Nacional de Cancerologia de Mexico

OTHER

Sponsor Role: lead

Responsible Party

Oscar Gerardo Arrieta Rodríguez MD

MD and medical oncologist

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Oscar Arrieta, MD

Role: PRINCIPAL_INVESTIGATOR

Instituto de Cancerología

Locations

Instituto Nacional de Cancerologia

Mexico City, Mexico City, Mexico

Countries

Mexico

References

Jemal A, Freddie Bray, Melissa M, et al. Cancer statistics, 2011. CA Cancer J Clin. 61: 69-90, 2011. Wong DW. The EML4-ALK Fusion Gene Is Involved in Various Histologic Types of Lung Cancers From Non smokers With Wild-type EGFR and KRAS. Cancer 15, 1723-1733, 2009. Shaw, A. T. et al. Clinical Features and outcome of patients with non-small-cell lung cancer who harbor EML4-ALK. J. Clin. Oncol. 27, 4247-4253 2009. Kwak, E. L. et al. Anaplatic lymphoma kinase Inhibition in non-small cell lung cancer. N. Engl. J. Med. 363, 1693- 1703 2010. Soda M., Takada, S., Takeuchi, K., Choi, Y.L., Enomoto, M., Ueno, T. et al. A mouse model for EML4-ALK- positive lung cáncer. Proc Natl Acad Sci U S A 105: 19893-19897, 2008.

Reference Type: BACKGROUND

Other Identifiers

INCAN/CC/039/11

Identifier Type: -

Identifier Source: org_study_id