title: Influence of intraperitoneal application of taurolidine/heparin on expression of adhesion molecules and colon cancer in rats undergoing laparoscopy.
abstract: BACKGROUND
  Recent experimental studies have shown that intraperitoneal administration of taurolidine/heparin causes a reduction of local tumor growth after laparoscopy in rat models. It might be that the anti-adherent activities of these agents are responsible for this effect. In this study we investigated the adhesion molecules E-cadherin, beta1-integrin, and CD44.
  
  
  METHODS
  Following a 10,000 colon adenocarcinoma cells' (DHD/K12/TRb) intraperitoneal application a cecum resection and a partial parietal peritoneum resection (1 x 1 cm) were performed using a three trocar technique in 30 BD IX rats. After randomization in two groups, the cecum suture line and the parietal peritoneal defect were either lavaged with 1 mL of 0.5% taurolidine/10 IU heparin or with equal amounts of 0.9% normal saline solution. Rats were sacrificed four weeks after operation and total tumor growth was determined. E-cadherin, beta1-integrin, and CD44 were assessed immunohistochemically on the tumor tissue.
  
  
  RESULTS
  The expression of E-cadherin was significantly reduced to 46.7% (complete loss of staining) in the taurolidine/heparin group. Although no significant difference was detected concerning the beta1-integrin and CD44 expression, a slightly reduced expression level with 26.7% of negative staining in metastases of the taurolidine/heparin group was observed. The total tumor weight (171.1 +/- 181.2 mg) as well as the total number of tumor lesions was also reduced by the substances compared to the control group (283.2 +/- 91.4 mg).
  
  
  CONCLUSIONS
  Taurolidine/heparin led to a significant reduction of local tumor growth. Additionally a reduction of the expression of E-cadherin was observed. However, the biological behavior of this molecule is multivariant, controversial and still unclear. Further studies should elucidate its role in the epithelial tumor genesis.
authors.affiliation: Department of General, Visceral, Vascular and Thoracic Surgery, Universitaetsmedizin Berlin, Medical Faculty Charité, Humboldt University, Schumannstr, Berlin, Germany.
authors.forename: Eva
authors.initials: E
authors.lastname: Bobrich
authors.forename: Chris
authors.initials: C
authors.lastname: Braumann
authors.forename: Isabelle
authors.initials: I
authors.lastname: Opitz
authors.forename: Charalambos
authors.initials: C
authors.lastname: Menenakos
authors.forename: Glen
authors.initials: G
authors.lastname: Kristiansen
authors.forename: Christoph A
authors.initials: CA
authors.lastname: Jacobi
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy* / Q000556:secondary / Q000601:surgery*; D000818:Animals; D000925:Anticoagulants / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000494:pharmacology*; D015820:Cadherins / Q000235:genetics; D015815:Cell Adhesion Molecules / Q000235:genetics*; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery*; D003131:Combined Modality Therapy; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006493:Heparin / Q000494:pharmacology; D018960:Hyaluronan Receptors / Q000235:genetics; D007274:Injections, Intraperitoneal; D019012:Integrin beta1 / Q000235:genetics; D007413:Intestinal Mucosa / Q000502:physiology; D010535:Laparoscopy; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D013654:Taurine / Q000031:analogs & derivatives* / Q000494:pharmacology; D013829:Thiadiazines / Q000494:pharmacology*
chemical_list: D000925:Anticoagulants; D000970:Antineoplastic Agents; D015820:Cadherins; D015815:Cell Adhesion Molecules; D018960:Hyaluronan Receptors; D019012:Integrin beta1; D013829:Thiadiazines; D013654:Taurine; C012566:taurolidine; D006493:Heparin