Das Peritoneum. Darm und Peritoneum. Hernien. Berlin: Springer Berlin Heidelberg; 1976. pp. 632-940. [DOI: 10.1007/978-3-642-80598-1_5]

Establishment of the SIS scaffold-based 3D model of human peritoneum for studying the dissemination of ovarian cancer

Ovarian cancer is the second most common gynecological malignancy in women. More than 70% of the cases are diagnosed at the advanced stage, presenting as primary peritoneal metastasis, which results in a poor 5-year survival rate of around 40%. Mechanisms of peritoneal metastasis, including adhesion, migration, and invasion, are still not completely understood and therapeutic options are extremely limited. Therefore, there is a strong requirement for a 3D model mimicking the in vivo situation. In this study, we describe the establishment of a 3D tissue model of the human peritoneum based on decellularized porcine small intestinal submucosa (SIS) scaffold. The SIS scaffold was populated with human dermal fibroblasts, with LP-9 cells on the apical side representing the peritoneal mesothelium, while HUVEC cells on the basal side of the scaffold served to mimic the endothelial cell layer. Functional analyses of the transepithelial electrical resistance (TEER) and the FITC-dextran assay indicated the high barrier integrity of our model. The histological, immunohistochemical, and ultrastructural analyses showed the main characteristics of the site of adhesion. Initial experiments using the SKOV-3 cell line as representative for ovarian carcinoma demonstrated the usefulness of our models for studying tumor cell adhesion, as well as the effect of tumor cells on endothelial cell-to-cell contacts. Taken together, our data show that the novel peritoneal 3D tissue model is a promising tool for studying the peritoneal dissemination of ovarian cancer.

Whole-body distribution of radioactivity after intraperitoneal administration of 32P colloids

The whole-body distribution of radioactivity after intraperitoneal instillation of 32P-labelled chromic hydroxide particles has been studied in patients operated for early-stage ovarian cancer. Gamma-camera imaging of the abdominal 32P-distribution revealed that the administration procedure was critical for obtaining a homogeneous plating of the radiocolloids on the serosal surface. Dose calculations based on a uniform distribution of 32P in a capillary layer covering the intraperitoneal surface gave an estimated tissue surface dose of about 30 Gy per 370 MBq of 32P administered. The amount of 32P in peripheral blood increased for seven days after instillation followed by a continuous decrease. Bone marrow concentration was from two to five times as high as that in blood, but the total amounts were too small to give significant radiation doses. Gel chromatography showed that 33% of the activity in blood consisted of high molecular weight material, probably colloids. The remainder of the activity (67%) was attached to material of very low molecular weight, appearing as a consequence of physiological degradation of the colloids.