Human omental adipose-derived stem cells from donors with different body mass index had similar effects on proliferation and migration of endometrial cancer cells in vitro

Aim This study aimed to confirm whether human omental adipose-derived stem cells (O-ASC) from donors with varying body mass index (BMI, calculated in kg/m(2)) exert different effects on proliferation and migration of endometrial cancer (EC) cells. Methods Omental adipose-derived stem cells were isolated from the omental adipose tissues of eight patients who were diagnosed with EC aged from 35 to 56 years. According to the patients' BMI, the O-ASC was divided into two groups: obesity group (BMI >= 30) and normal group (18.5 < BMI <= 24.9). A broad spectrum cytokine antibody array was used to measure 62 paracrine cytokines secreted by all the O-ASC. MTS assays, direct and indirect co-culture assays were used to assess the effects of O-ASC on proliferation and migration of Hec-1A (estrogen receptor-/progesterone receptor-) and Ishikawa (estrogen receptor+/progesterone receptor+) EC cells. Results Eight samples of O-ASC were successfully isolated including four samples in obesity group and four in normal group. All the O-ASC displayed typical characteristics of mesenchymal stem cells and possessed similar secretory functions as 26 cytokines were identified in condition medium of O-ASC based on cytokine antibody array. The proliferation of Ishikawa cells was gently stimulated by O-ASC from the two groups (P < 0.05) whereas without any effects on Hec-1A cells. Both horizontal and vertical migrations of EC cells were promoted by O-ASC (P < 0.01). However, there were no statistical differences between the two groups. Conclusion Human O-ASC could influence the proliferation and migration of EC cells in vitro but the effects were not modified by donors' BMI.