Analyzing of colorectal cancerrelated genes and microRNAs expression profiles in response to probiotics Lactobacillus acidophilus and Saccharomyces cerevisiae in colon cancer cell lines.

BACKGROUND: Colorectal cancer is the world's third most frequent cancer and the fourth cause of mortality. Probiotics play an important function in preventing metastasis as well as the growth and proliferation of malignant cancer cells. METHODS AND RESULTS: The study investigated the anticancer effect of Lactobacillus acidophilus supernatant and Saccharomyces cerevisiae yeast on colorectal cell lines, including HT29 and SW480 as a colorectal cancer model. The extract from the Lactobacillus acidophilus and Saccharomyces cerevisiae standard probiotics were prepared, and probiotics characterization was confirmed by morphological and Biochemical tests. The viability of HT29 and SW480 colon cancer cell lines on effecting probiotic supernatant was evaluated by measuring the MTT colorimetric method. Comparison of the expression profile of several genes involved in apoptosis, cell cycle, and metastatic pathway in HT29 and SW480 cell lines with the treatment of probiotics extract showed an upregulation in the BAX, CASP3, and CASP9 and down regulation BCl-2, MMP2, and MMP9 genes. Also, a comparison of microRNA expression profiles indicated an increase of miR 34, 135, 25, 16, 195, 27, 98, let7 and a decrease of miR 9, 106b, 17, 21, 155, 221. CONCLUSIONS AND DISCUSSION: The findings of this study indicate that probiotics can effectively suppress the proliferation of colorectal cancer cells and even reverse their development. Additionally, the study of cellular genes and miRNA profiles associated with colorectal cancer have demonstrated that our probiotics play a crucial role in CRC prevention by increasing the expression of tumor suppressor microRNAs and their target genes while decreasing oncogenes.

Evaluation of the Active Ingredient of Campsis radicans Essential Oils and its Antimicrobial Evaluation Against Pathogenic Bacteria.

Owing to the resistance of nosocomial pathogens to antibiotics, the need for herbal medicines is felt. The aim of this study was to identify the chemical composition of bark essential oils of Campsis radicans and the effect of its free and encapsulated form on resistant nosocomial pathogens. This plant is a native of Northern Iran. The Bark essential oils of Campsis radicans was first extracted and its antimicrobial effects were investigated. Then, its phytochemical compounds were determined using Gas Chromatography-Mass Spectrometry (GC/MS). Guaiacol (2-methoxy phenol) was selected as the active ingredient among 32 compounds (2.40%). It was encapsulated and the encapsulation efficiency (EE), the particle size, polydispersity index (pdi), Fourier transform infrared (FTIR), release, and stability were determined. Then, the antimicrobial effect of both free and encapsulated forms was evaluated on cotrimoxazole-resistant Pseudomonas aeruginosa, cefixime-resistant Escherichia coli, and fluconazole-resistant Candida albicans. It was observed that both free and encapsulated forms of Guaiacol had an antimicrobial effect on the studied resistant strains, but the encapsulated form had a more antimicrobial effect due to more stability and a more targeted effect. MBC (MFC) ranged from 0.270 to 0.439 µg/ml in the free form and from 0.055 to 0.133 µg/ml in the encapsulated form, EE was 86%, particle size, and pdi were 138 nm and 0.26, respectively. This study showed that this plant can be a suitable alternative to chemical drugs due to its antimicrobial effects.

Evaluation of The Number of CD4(+) CD25(+) FoxP3(+) Treg Cells in Normal Mice Exposed to AFB1 and Treated with Aged Garlic Extract.

OBJECTIVE: Aflatoxin B1 (AFB1) suppresses the immune system. To decrease such suppressive effects on the immune system, a wide range of herbal medicines like garlic are utilized. Biological activities of garlic in vitro and in vivo have also been verified. Our previous studies demonstrated that aged garlic (dry garlic bulbs preserved in the freezer for six months at -20˚C) have increased immunostimulator fractions and reduced immunosuppressor fractions. This study focuses on the immunosuppressor activity of AFB1 and immunostimulator activity of aged garlic extract (AGE) through the evaluation of CD4(+) CD25(+) FoxP(+) regulator cell (Treg) counts and the pattern of cytokine production in Balb/c normal mice. MATERIALS AND METHODS: In this experimental research, AFB1 was separated from Aspergillus flavus (PTCC 5004) by HPLC and AGE prepared using the Mantis method. The Delayed-Type Hypersensitivity (DTH) test was carried out to determinate the effectiveness of different doses of AGE and AFB1, which can both have an effect on the immune system. Subsequent experiments were carried out on 20 Balb/c mice to estimate the effects of AGE and AFB1 on the number of Treg cell in 4 groups: 10 µl/kg/day of AFB1 and AGE diluents were administered for 4 consecutive days to group 1. AFB1, 2. control, 3. AGE + AFB1 and 4. AGE via intraperitoneal (IP) route, respectively. Mice were sacrificed and splenocytes harvested and the percentage of splenic Treg cells was measured by flow cytometry analysis. The ELISA method was utilized to measure Cytokine production. RESULTS: The findings reveal that AGE increased the level of IFN-λ and IL-4 cytokines produced by splenocytes stimulated by specific tumor antigen and decreased the number of Treg cells in the spleen (p<0.05). AFB1 increased the number Treg cells in the spleen and decreased cytokine production (p<0.05). In groups 2 (control) and 4 (AGE) the number of Treg cells decreased (p value<0.05) whereas in groups 1 and 3 the number of Treg cells increased (p<0.05). CONCLUSION: This study indicated that AGE is able to alter the cytokine production in normal mice into a Th1 protective pattern which is beneficial to the immune system in general and anti-tumor immunity in particular. AFB1 is able to alter the cytokine production into a Th2 protective pattern. Therefore, AGE might be used as herbal medicine with few side effects as compared to chemotherapy in treating cancers caused by substances like AFB1.