Geun Soo Park

Publications (2)0 Total impact

• Article: [Clinical effectiveness of transcatheter arterial embolization for acute upper and lower non-variceal gastrointestinal bleeding].

  Min Ho Park, Geun Soo Park, Sang Wook Park, Lim Kwan Jhu, Phil Jin Jung, Nam Hun Lee, Chang Hwan Park, Wan Sik Lee, Young Eun Joo, Hyun Soo Kim, Sung Kyu Choi, Jong Sun Rew, Woong Yoon, Jae Kyu Kim, Sei Jong Kim
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  ABSTRACT: Although the initial rate of hemostasis achieved by endoscopic treatment for acute non- variceal gastrointestinal bleeding (NVGIB) is high, recurrent or persistent bleeding occurs in 10% to 25% of the patients. The aim of this study was to assess the efficacy and safety of transcatheter arterial embolization (TAE) in patients with acute upper and lower NVGIB who could not be managed by endoscopic treatment. A retrospective analysis of the clinical data was done in 43 patients (M/F: 26/17, mean age: 60 years) whom underwent angiography or TAE for acute upper and lower NVGIB between January 1998 and December 2003. Among 43 patients, 18 had upper NVGIB, 19 had lower NVGIB, and 6 had obscure gastrointestinal bleeding. Demographic characteristics and outcome parameters including the rates of hemostasis, in-hospital death, and complications were analyzed. Thirty-four patients underwent TAE while 9 patients underwent angiography. TAE was used as the first line treatment in 17 patients and as the second line treatment in others. Hemostasis was achieved in 29 of 34 patients (85.3%) by TAE. According to the site of bleeding, hemostasis was achieved in 14 of 17 patients (82.4%) with upper NVGIB and in 15 of 17 patients (88.2%) with lower NVGIB. There was no significant angiography or TAE-related complications such as bowel ischemia or infarction except a hematoma on the angiography site in one patient. TAE is effective and safe in patients with acute upper or lower NVGIB who cannot be managed by endoscopic treatment.
  The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi 11/2005; 46(4):262-8.
• Article: [Expression of PTEN and its correlation with angiogenesis in gastric carcinoma].

  Geun Soo Park, Young Eun Joo, Hyun Soo Kim, Sung Kyu Choi, Jong Sun Rew, Chang Soo Park, Sei Jong Kim
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  ABSTRACT: Phosphatase and tensin homolog deleted on chromosome ten (PTEN) is a recently clarified tumor suppressor gene located in 10q23.3. Alterations of this gene are associated with tumor progression and unfavorable outcome in various human cancers. Recently, PTEN has a possible role in angiogenesis by modulating angiogenic factor including vascular endothelial growth factor (VEGF). The aim of this study was to investigate the roles of PTEN and VEGF status for angiogenesis in human gastric cancer. We conducted an immunohistochemical investigation of PTEN and VEGF expression in 90 cases of paraffin section obtained from gastric cancer patients undergone surgical treatment. Negative expression of PTEN and positive expression of VEGF in gastric cancer tissues, were demonstrated in 40.0% and 77.8% of cases, respectively. However, no significant correlation was found between PTEN, VEGF expression and various clinicopathological parameters. PTEN expression did not correlate significantly with VEGF expression (p=0.301). High microvessel density (MVD) was significantly associated with lymph node metastasis and poor survival (p=0.014, 0.011, respectively). The mean MVD value of PTEN negative tumors was 90.4+/-43.0 and significantly higher than that of PTEN positive tumors (p=0.028). The mean MVD value of VEGF positive tumors was 86.4+/-6.7 and significantly higher than that of VEGF negative tumors (p=0.002). The mean MVD value of PTEN negative and VEGF positive tumors was 98.0+/-42.2, and significantly higher than those of the others. These results suggest that loss of PTEN expression may play a critical role in tumor progression and metastasis by stimulating tumor angiogenesis in human gastric cancer.
  The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi 10/2005; 46(3):196-203.