Increased expression of P2RY2, CD248 and EphB1 in gastric cancers from Chilean patients.
BACKGROUND
Gastric cancer (GC) ranks as one of the major causes of mortality due to cancer worldwide. In Chile, it is currently the leading cause of cancer death. Identification of novel molecular markers that may help to improve disease diagnosis at early stages is imperative.


METHODS
Using whole-genome DNA microarrays we determined differential mRNA levels in fresh human GC samples compared to adjacent healthy mucosa from the same patients. Genes significantly overexpressed in GC were validated by RT-PCR in a group of 14 GC cases.


RESULTS
The genes CD248, NSD1, RAB17, ABCG8, Ephb1 and P2RY2 were detected as the top overexpressed in GC biopsies. P2RY2, Ephb1 and CD248 showed the best sensitivity for GC detection with values of 92.9%, 85.7% and 64.3% (p<0.05), respectively. Specificity was 85.7%, 71.4% and 71.4% (p<0.05), for each respectively.
Departamento de Ciencias Biomedicas, Facultad de Medicina, Universidad Catolica del Norte, Coquimbo, Chile E-mail : gbernal@ucn.cl.
Gisela
G
Aquea
Gustavo
G
Bresky
Domingo
D
Lancellotti
Juan Andres
JA
Madariaga
Vittorio
V
Zaffiri
Ulises
U
Urzua
Sergio
S
Haberle
Giuliano
G
Bernal
D015703:Antigens, CD / Q000235:genetics*; D000951:Antigens, Neoplasm / Q000235:genetics*; D014408:Biomarkers, Tumor; D002677:Chile; D015972:Gene Expression Regulation, Neoplastic / Q000235:genetics*; D006801:Humans; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods; D012333:RNA, Messenger / Q000235:genetics; D036225:Receptor, EphB1 / Q000235:genetics*; D058473:Receptors, Purinergic P2Y2 / Q000235:genetics*; D013274:Stomach Neoplasms / Q000235:genetics*
D015703:Antigens, CD; D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; C078203:CD248 protein, human; C546385:P2RY2 protein, human; D012333:RNA, Messenger; D058473:Receptors, Purinergic P2Y2; D036225:Receptor, EphB1