Abstract
The impact of CDH1 gene mutations and large deletions on hereditary diffuse gastric cancer (HDGC) and early onset diffuse gastric cancer (EODGC) has not been determined in Asians. We investigated the mutation status of the CDH1 gene in 25 Korean EODGC patients younger than 50 years and 23 HDGC patients who met the clinical criteria for HDGC. Polymerase chain reaction-direct sequencing was performed, and multiplex ligation-dependent probe amplification (MLPA) was used to evaluate the patients with negative sequencing results. We determined that 2 of 25 (8 %) EODGC patients had CDH1 germline mutations. One was a nonsense mutation (c.1003C>T, p.Arg335*, exon 7) in a 41-year-old female with no family history of cancer. The other was a missense mutation (c.715G>A, p.Gly239Arg, exon 6) in a 28-year-old male with no family history of cancer. One of 23 (4.3 %) HDGC patients had a CDH1 germline mutation (c.1003C>T). The patient’s brother and sister died of stomach cancer. The MLPA results revealed no deletion or duplication in any patient. More research is needed to determine additional genetic targets that trigger HDGC. More comprehensive methods such as next-generation sequencing might be a good approach that can be used to identify the genetic causes of pathogenetically unexplained disorders.
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This study was supported by a faculty research grand of Gachon University, Gil Medical Center for 2010.
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The authors declare that they have no conflict of interest.
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Sollip Kim and Jun-Won Chung contributed equally to this work.
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Kim, S., Chung, JW., Jeong, TD. et al. Searching for E-cadherin gene mutations in early onset diffuse gastric cancer and hereditary diffuse gastric cancer in Korean patients. Familial Cancer 12, 503–507 (2013). https://doi.org/10.1007/s10689-012-9595-6
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DOI: https://doi.org/10.1007/s10689-012-9595-6