نوع مقاله : مقاله های پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، گروه زیستشناسی، دانشکدهی علوم، دانشگاه ارومیه، ارومیه، ایران
2 استادیار، گروه زیستشناسی، دانشکدهی علوم، دانشگاه ارومیه، ارومیه، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Background: This study was aimed to evaluate the effect of high and low molecular weight of protein fraction obtained from Lactobacillus casei and paracasei cell wall on K562 cell line.Methods: Bacteria cultured in special medium and incubated in anaerobic condition and washed with PBS (Phosphate buffered saline) and then, sonicated and centrifuged for cell wall separation. Protein precipitation was conducted with trichloroacetc acid (72%) and sodium deoxalate (15%). Then, different concentrations (500, 1000, 2000, 3000 and 4000 µg/ml) of cell wall proteins were prepared in cell culture medium for each bacteria, separately. In-vitro anticancer properties of both bacteria proteins were assayed in 12, 24, 48 and 72 hours with MTT colorimetric method [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] with 10000 cells per well.Findings: The high and low molecular weight proteins of both bacteria inhibit the growth of K562 significantly (P = 0.046).Conclusion: Based on the results, we conclude that high molecular weight of both probiotic bacteria significantly could inhibit the growth of K562 more than the low molecular protein fractions. Also, protein fraction of Lactobacillus paracasei significantly had more anticancer properties than protein fraction of Lactobacillus casei.
کلیدواژهها [English]