title: [Impact of pneumoperitoneum on expression of E-cadherin, CD44v6 and CD54 (ICAM-1) on HT-29 colon-carcinoma cells].
abstract: BACKGROUND
  The mechanism of potential tumor cell spread and growth during laparoscopy is poorly understood. Nevertheless, different experimental studies reported a stimulation of tumor cell growth and an increased metastatic potential of carcinoma cells using carbon dioxide as an insufflation medium. Adhesion molecules do play an important and regulatory function in the process of metastatic spread and invasion of cancer cells. Therefore we investigated the influence of CO2 and Helium insufflation on the in-vitro expression of E-Cadherin, CD44v6 and CD54 (ICAM-1) on HT-29 colon carcinoma cells.
  
  
  METHODS
  HT-29 carcinoma cells were exposed to either CO2 or helium insufflation. Expression of E-Cadherin, CD44v6 and CD54 (ICAM-1) on HT-29 colon carcinoma cells were measured 1, 12, 24, 48 and 96 h after CO2 and helium insufflation using flowcytometry (FACScan). Data were analyzed by Friedman-test.
  
  
  RESULTS
  HT-29 cell line showed a short decrease in E-Cadherin expression after CO2 exposure while helium insufflation had no influence. In contrasts to these findings the expression of CD44v6 and CD54 on HT-29 cells were not influenced significantly by either CO2 or helium.
  
  
  CONCLUSIONS
  CO2 seems only to have a minor influence on the expression of E-Cadherin while expression of other adhesion molecules did not change after CO2 incubation. The alternative gas helium did not cause any significant changes of the expression of either E-Cadherin, CD44v6 and CD54. Further investigations are needed to elucidate the changes of the metastatic potential of tumor cells after laparoscopic and open procedures.
authors.affiliation: Klinik für Allgemein-, Viszeral-, Gefäss- und Thoraxchirurgie, Medizinische Fakultät der Charité, Universitätsmedizin Berlin, Campus Mitte. juergen.ordemann@charite.de
authors.forename: J
authors.initials: J
authors.lastname: Ordemann
authors.forename: C
authors.initials: C
authors.lastname: Höflich
authors.forename: C
authors.initials: C
authors.lastname: Braumann
authors.forename: J
authors.initials: J
authors.lastname: Hartmann
authors.forename: C A
authors.initials: CA
authors.lastname: Jacobi
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology; D015820:Cadherins / Q000032:analysis*; D002245:Carbon Dioxide / Q000633:toxicity*; D003110:Colonic Neoplasms / Q000473:pathology; D006023:Glycoproteins / Q000032:analysis*; D019073:HT29 Cells; D006371:Helium / Q000633:toxicity; D006801:Humans; D018960:Hyaluronan Receptors / Q000032:analysis*; D066298:In Vitro Techniques; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis*; D010535:Laparoscopy; D009361:Neoplasm Invasiveness / Q000473:pathology; D009362:Neoplasm Metastasis / Q000473:pathology*; D011028:Pneumoperitoneum, Artificial; D014407:Tumor Cells, Cultured / Q000473:pathology*
chemical_list: C112697:CD44v6 antigen; D015820:Cadherins; D006023:Glycoproteins; D018960:Hyaluronan Receptors; D018799:Intercellular Adhesion Molecule-1; D002245:Carbon Dioxide; D006371:Helium