Genome-wide screening for genomic aberrations in Kazakh patients with esophageal squamous cell cancer by comparative genomic hybridization

Multiple chromosome aberrations are responsible for tumorigenesis of esophagus squamous cell carcinoma (ESCC). To characterize genetic alterations by comparative genomic hybridization (CGH) and their relation to ESCC, We enrolled 54 members with ESCC from Kazakh's patients. We found that the deletions of 3p (p = 0.032), 17p (p = 0.004), 22q (p = 0.000) and gains of 5p (p = 0.000), 11q (p = 0.000) were significantly correlated with the location of tumors. Losses of 1p (p = 0.005), 3p (p = 0.006), 22q (p = 0.024) and gains of 3q (p = 0.043), 8q (p = 0.038), 18q (p = 0.046) were also found more frequently in patients with larger diameter disease. The loss of 19q (p = 0.005) and gains of l3q (p = 0.045), 18p (p = 0.018) were significantly correlated with pathologic grade. The gain of 7p (p = 0.009) and deletion of 19q (p = 0.018) were seen more frequently in patients with Grade III-IV tumors. Chromosome amplifications in ESCC at 1q (p = 0.008), 7p (p = 0.008), 8q (p = 0.018) and deletions at 3p (p = 0.021), 11q (p = 0.002), 17p (p = 0.012) were related to lymph node metastasis; the gains of 1q (p = 0.026) and 6q (p = 0.017) and the loss of 11q (p = 0.001) were significant in different isoforms of HPV infection. We identified some chromosomes in which the genes were related to the tumorgenesis of ESCC, which may be a theme for future investigation.