3p microsatellite signature in exhaled breath condensate and tumor tissue of patients with lung cancer.
BACKGROUND
Our group has recently demonstrated the possibility of studying microsatellite alterations (MAs) of 3p in the DNA of exhaled breath condensate (EBC) of patients with non-small cell lung cancer (NSCLC).


OBJECTIVE
To verify whether MAs analyzed in DNA from EBC reflect a profile of alterations present in tumor tissue of NSCLC.


METHODS
Fifty-nine subjects undergoing histologic diagnosis for clinical suspicion of lung cancer entered the study: 41 were found to have NSCLC and 18 to have nonneoplastic diseases. All subjects underwent allelotyping on DNA from whole blood, EBC, and lung tissue removed for histologic diagnosis by analyzing a panel of five microsatellites located in chromosomal region 3p. Results obtained from DNA of the three biological sites and nonneoplastic tissues from controls were compared.


RESULTS
MAs in DNA from tumor tissues and EBC of each patient with cancer presented an overlapping profile of loss of heterozygosity and microsatellite instability. An MA profile of DNA of lung tissue reflecting the DNA of EBC profile from controls was also confirmed. Smoking status was associated with the presence of MAs in patients with NSCLC and in control subjects.


CONCLUSIONS
We demonstrated that MAs in DNA from EBC of patients with NSCLC are significantly more frequent than in control subjects. More interesting, the MA profile of DNA from EBC corresponds to that from lung cancer tissue of each patient with NSCLC.
Carpagnano
Giovanna E
GE
Institute of Respiratory Disease, University of Foggia, Foggia, Italy. ge.carpagnano@unifg.it
Foschino-Barbaro
Maria Pia
MP
Spanevello
Antonio
A
Resta
Onofrio
O
Carpagnano
Francesco
F
Mulé
Giuseppina
G
Pinto
Rosamaria
R
Tommasi
Stefania
S
Paradiso
Angelo
A
D000368:Aged; D015415:Biomarkers; D001773:Blood Cells / Q000737:chemistry; D001944:Breath Tests / Q000379:methods; D002289:Carcinoma, Non-Small-Cell Lung / Q000175:diagnosis / Q000235:genetics*; D016022:Case-Control Studies; D045853:Exhalation; D005260:Female; D006801:Humans; D019656:Loss of Heterozygosity; D008175:Lung Neoplasms / Q000175:diagnosis / Q000235:genetics*; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics*; D008875:Middle Aged; D012907:Smoking / Q000009:adverse effects*
D015415:Biomarkers