Biodegradable polyethylene oxide (PEO)/chitosan (CS)/poly(ε-caprolactone) (PCL)/olive oil composite nanofibers were fabricated by electrospinning process. The prepared nanofibers were characterized using SEM and FTIR analysis. A response surface methodology based on Box-Behnken design (BBD) was used to predict the average diameter of electrospun nanofibers based on electrospinning parameters including voltage, flow rate and tip-collector distance. The optimum experimental average diameter of electrospun nanofibers was found to be 86 nm which was in good agreement with the predicted value by the BBD analysis (88 nm). In vitro release of olive oil incorporated PEO/CS/PCL/olive oil nanofibers demonstrated a rapid release of olive oil during the first 3 h which enhanced gradually afterwards. Good attachment, spreading, cell proliferation, as well as nontoxic behavior of PEO/CS/PCL/olive oil nanofibrous scaffolds on HDF fibroblast cells were proved by cytotoxicity studies. Furthermore, the high antibacterial activity of PEO/CS/PCL/olive oil composite nanofibers against Gram-negative bacteria E. coli and Gram-positive S. aureus was observed. This study suggests that the prepared PEO/CS/PCL/olive oil composite nanofibrous scaffolds could be used as an ideal patch for wound dressing applications.

This study aimed to investigate the protective effects of 16h-serum starved-fibroblasts culture supernatant (16h-SFS) with and without bone marrow-derived mesenchymal stem/stromal cells (BMSCs) on the pathological and immunomolecular features of LA7 cancer stem cells-induced mammary tumor in rats. In an interventional study, 30 female rats were selected and the breast tumors were induced in all rats by LA7 cell and then were divided into six groups. The rats receiving the DMEM or PBS were considered as control groups. Three other groups received 16h-SFS solution, BMSCs, and 16h-SFS + BMSCs, respectively. After the treatment procedure, the tumor size were measured. Then the tumor tissues were evaluated in 10 high-power fields regarding the angiogenesis rate, mitotic cells, and type of immune cells infiltrated into the tumor microenvironment. Also, the expression of Cxcl9, Cxcl10, and Cxcl12 chemokines in tumors was examined by the Real-Time PCR method. Tumor size in 16h-SFS, BMSCs, and 16h-SFS + BMSCs groups were significantly reduced. Also, the tumor angiogenesis was significantly decreased in 16h-SFS + BMSCs vs. DMEM group. Also, the highest presence of mononuclear immune cells was observed in tumor tissues of the 16h-SFS + BMSCs group. A significant increase in Cxcl9 gene expression was observed in 16h-SFS + BMSCs vs. PBS and DMEM groups. Also, the Cxcl10 gene expression 16h-SFS + BMSCs group significantly increased vs. 16h-SFS, BMSCs, PBS, and DMEM groups. Our findings suggest that simultaneous administration of 16h-SFS and BMSC has an anti-tumor effect against LA7-induced tumors by modulating pathological and immeunological features. Therefore, these compounds could be considered as a promising cancer therapeutic approach.