Novel medicinal mushroom blend suppresses growth and invasiveness of human breast cancer cells
INTERNATIONAL JOURNAL OF ONCOLOGY
Authors: Jiang, Jiahua; Sliva, Daniel
Abstract
Mushrooms are an integral part of Traditional Chinese Medicine (TCM), and have been used for millennia to prevent or treat a variety of diseases Currently mushrooms or their extracts are used globally in the form of dietary supplements In the present study we have evaluated the anticancer effects of the dietary supplement MycoPhyto (R) Complex (MC), a novel medicinal mushroom blend which consists of a blend of mushroom mycelia from the species Agaricus blazei, Cordyceps sinensis, Coriolus verstcolor, Ganoderma lucidum, Grifola frondosa and Polyporus umbellatus, and beta-1,3-glucan isolated from the yeast, Saccharomyces cerevisiae Here, we show that MC demonstrates cytostatic effects through the inhibition of cell proliferation and cell cycle arrest at the G2/M phase of highly invasive human breast cancer cells MDA-MB-231 DNA-microarray analysis revealed that MC inhibits expression of cell cycle regulatory genes (ANAPC2, ANAPC2 BIRC5, Cyclin B1 Cychn H, CDC20 CDK2, CKS1B Cullin 1 E2F1 KPNA2 PKMYT1 and TFDP1) Moreover, MC also suppresses the metastatic behavior of MDA-MB-231 by the inhibition of cell adhesion, cell migration and cell invasion The potency of MC to inhibit invasiveness of breast cancer cells is linked to the suppression of secretion of the urokinase plasminogen activator (uPA) from MDA-MB-231 cells In conclusion, the MC dietary supplement could have potential therapeutic value in the treatment of invasive human breast cancer
Circular RNA circ_0079593 promotes glioma development through regulating KPNA2 expression by sponging miR-499a-5p
EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES
Authors: Yang, Z.; Li, C.; Fan, X-Y; Liu, L-J
Abstract
OBJECTIVE: Glioma is a common aggressive cancer and a major public health problem worldwide, with high incidence, recurrence. and mortality. Circular RNA (circRNA) has been reported to be involved in glioma, but the role of circ_0079593 in glioma is still unclear. MATERIALS AND METHODS: The real-time quantitative polymerase chain reaction (RT-qP-CR) was performed to quantify the expression levels of circ_0079593. miR-499a-5p, and karyopherin alpha 2 (KPNA2) in glioma tissues or cells. The protein expression level of KPNA2 was assessed by Western blot. 3-(4, 5-dimethylthiazol-2-yl)-2.5 -diphenyl-2H -tetrazol-3-ium bromide (MTT), flow cytometry. and transwell assays were conducted to evaluate proliferation, apoptosis, migration and invasion of glioma cells, respectively. The relationship between miR-499a-5p and circ_0079593 or KPNA2 was analyzed by bioinformatics database and confirmed by Dual-Luciferase reporter analyses, respectively. The effects of circ_0079593 silencing in vivo were measured by a xenograft experiment. RESULTS: Circ_0079593 and KPNA2 were elevated in glioma tissues and cells. Loss-of functional experiments revealed that knockdown of circ_0079593 hampered the progression of glioma by repressing proliferation, motility and inducing apoptosis in vitro and declining tumor growth in vivo. Similarly, suppression of KPNA2 impeded the process of glioma by inhibiting proliferation, motility and increasing apoptosis. MiR-499a-5p. interacting with KPNA2, was a target gene of circ_0079593. In addition, overexpression of KPNA2 could reverse the effects of circ_0079593 knockdown on proliferation, apoptosis, migration and invasion of glioma cells. Mechanistically. circ_0079593 mediated proliferation, motility and apoptosis of glioma cells by regulating KPNA2 expression via sponging miR499a-5p. CONCLUSIONS: Circ_0079593 stimulated the pathological process of glioma via acting as competing endogenous RNA to sponge miR-499a-5p.