RESUMO
<p><b>OBJECTIVE</b>To establish serum protein fingerprint model for early diagnosis of pancreatic cancer with surface enhanced laser desorption/ionization time of flight-mass spectrometry (SELDI-TOF-MS) and bioinformatics techniques.</p><p><b>METHODS</b>A total of 73 samples were analyzed in this study, including 31 cases of pancreatic cancers, 22 cases of pancreatitis and 20 healthy individuals. Samples were first analyzed by SELDI-TOF-MS and two patterns of differentiation model were constructed with support vector machine arithmetic method.</p><p><b>RESULTS</b>The pattern 1 model differentiating pancreatic cancer patients from healthy individuals had a specificity and a sensitivity of both 100.0%. The pattern 2 model differentiating pancreatic cancer from pancreatitis had a specificity of 95.5% and a sensitivity of 93.5%.</p><p><b>CONCLUSION</b>SELDI-TOF-MS technique combined with bioinformatics can facilitate to identify biomarkers for pancreatic cancer.</p>
Assuntos
Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Biomarcadores Tumorais , Sangue , Proteínas Sanguíneas , Neoplasias Pancreáticas , Sangue , Diagnóstico , Análise Serial de Proteínas , Métodos , Sensibilidade e Especificidade , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz , Métodos , Máquina de Vetores de SuporteRESUMO
<p><b>OBJECTIVE</b>To investigate the effects and prognosis of surgical treatment in primary gastrointestinal stromal tumors (GIST).</p><p><b>METHODS</b>The clinicopathological data of 73 patients with primary GIST underwent operation from April 1997 to December 2007 was retrospectively analyzed, and the prognosis was evaluated too.</p><p><b>RESULTS</b>Among the 73 cases, 68 cases received complete tumor resection, among which 12 cases underwent laparoscopic operation; while palliative resection and biopsy only were carried out in the other 5 cases. There was significant difference in survival rate between the two groups (P = 0.000). The 1-, 3-, 5-year survival rates of the 66 cases had been followed up was 91.0%, 78.2% and 74.1%, respectively. The malignancy risk grades of GIST was related to the survival rates on statistical analysis (P = 0.002). Significant differences were found in the survival rates between the patients with very low grade, low grade and high grade malignancy tumors (P = 0.012, 0.002).</p><p><b>CONCLUSIONS</b>Complete tumor resection should be emphasized in primary GIST, and more attention should be paid to the initial surgical treatment. Extended surgical resection is required for tumors of higher malignancy risk. The indications of laparoscopic surgery in GIST should be selected with caution for tumor complete resection.</p>