Identification the Effect of Some Antibiotics on the Activities of Brucella melitensis that Isolated from Patients in Baghdad

Brucellosis constitutes a major health problem around the world, especially in developing countries. The sensitivity pattern of the Brucella isolates encountered in the most countries, numerous studies were indicated the sensitivity of Brucella melitensis to some antibiotics and resistance to another. The aim of this study to evaluated, in vitro, the effect of single and combination of some antibiotics on the activities of Brucella melitensis.             This study included collection of (100) clinical sample of blood from different hospital in Baghdad. Six isolates of Brucella melitensis were identified and determine according to their biotypes. The susceptibility to different antibiotics was evaluated by disk diffusion method and MICs for some antibiotics used for brucellosis treatment were applied. Some antibiotics combination affect at concentrations of sub MIC on the growth of Brucella melitensis.             Results showed that isolates of Brucella melitensi were sensitive completely to gentamycin, kanamycin and naldixic acid while it’s resistant to lincomycin, rifampicin, ciprofloxacin, Levofloxacin and doxycyline.             The MIC to doxycycline and rifampicin were (40 and 5) μg/ml. respectively. There was an important effect on bacterial growth when the following antibiotics were mixed as (doxycyline+ rifampicin). The doxycycline changed the colonies from growth phase )pathogen phase( to intermediate phase while the rifampicin had no effect on colonies. The mixed of doxycycline with rifampicin have effect that change the pathogen phase to non pathogen phase (no growth phase).             By this study, we can conclude a combination of antibiotics should be used to treat Brucellosis, tetracyclines, quinolones, trimethoprim/sulfamethoxazole, rifampicin, and streptomycin are commonly used preparations for this treatment

Zinc Oxide Nanoparticles Induces Apoptosis in Human Breast Cancer Cells via Caspase-8 and P53 Pathway

Nanoparticles are a special institution of substances with precise capabilities and significant applications in many biomedical fields. In the present work zinc oxide nanoparticles were prepared through sol-gel approach. The synthesised nanoparticles were identified through the usage of X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In-vitro anticancer activity of zinc oxide nanoparticles towards MCF-7 cell lines using numerous parameters was investigated. Zinc oxide nanoparticles were determined to exert cell growth arrest against MCF-7 cell lines. The anti-proliferative efficiency of ZnO nanoparticles was due to cell dying and inducing apoptosis that were confirmed by the usage of acridine orange/ethidium bromide dual staining, DAPI staining and genotoxicity assay. Reverse transcription polymerase chain reaction (RT- PCR) analysis achieved to identify the gene expression of Caspase-8, Caspase-9, and P53. The results suggested that ZnO nanoparticles might find a wide use in clinical applications and provide new drug recompense for chemotherapy drugs

Gene expression and apoptosis response in hepatocellular carcinoma cells induced by biocompatible polymer/magnetic nanoparticles containing 5-fluorouracil

Background: Super-paramagnetic iron oxide nanoparticles (SPION) contain a chemotherapeutic drug and are regarded as a promising technique for improving targeted delivery into cancer cells. Results: In this study, the fabrication of 5-fluorouracil (5-FU) was investigated with loaded Dextran (DEX-SPION) using the co-precipitation technique and conjugated by folate (FA). These nanoparticles (NPs) were employed as carriers and anticancer compounds against liver cancer cells in vitro. Structural, magnetic, morphological characterization, size, and drug loading activities of the obtained FA-DEX-5-FU-SPION NPs were checked using FTIR, VSM, FESEM, TEM, DLS, and zeta potential techniques. The cellular toxicity effect of FA-DEX-5-FU-SPION NPs was evaluated using the MTT test on liver cancer (SNU-423) and healthy cells (LO2). Furthermore, the apoptosis measurement and the expression levels of NF-1, Her-2/neu, c-Raf-1, and Wnt-1 genes were evaluated post-treatment using flow cytometry and RT-PCR, respectively. The obtained NPs were spherical with a suitable dispersity without noticeable aggregation. The size of the NPs, polydispersity, and zeta were 74 ± 13 nm, 0.080 and −45 mV, respectively. The results of the encapsulation efficiency of the nano-compound showed highly colloidal stability and proper drug maintenance. The results indicated that FA-DEX-5-FU-SPION demonstrated a sustained release profile of 5-FU in both phosphate and citrate buffer solutions separately, with higher cytotoxicity against SNU-423 cells than against other cells types. These findings suggest that FA-DEX-SPION NPs exert synergistic effects for targeting intracellular delivery of 5-FU, apoptosis induction, and gene expression stimulation. Conclusions: The findings proved that FA-DEX-5-FU-SPION presented remarkable antitumor properties; no adverse subsequences were revealed against normal cells.How to cite: Mahdia SA, Kadhimb AA, Albukhaty S, et al. Gene expression and apoptosis response in hepatocellular carcinoma cells induced by biocompatible polymer/magnetic nanoparticles containing 5-fluorouracil. Electron J Biotechnol 2021;52. https://doi.org/10.1016/j.ejbt.2021.04.00

Smart Nanoformulation Based on Polymeric Magnetic Nanoparticles and Vincristine Drug: A Novel Therapy for Apoptotic Gene Expression in Tumors

Background: Advanced nanobiotechnology provides safe and efficient drug delivery systems to deliver chemotherapy that targets cancer cells efficiently. Methods: A polymeric-magnetic nanocarrier was composed of a dextran (DEX) shell, a superparamagnetic iron oxide (SPION) core and was conjugated with folate (FA) to carry the anticancer drug vincristine (VNC) in Tera-1 testicular tumor cells. The molecular mechanisms by which apoptosis was induced were analyzed using flow cytometry and qPCR, which exhibited anticancer activity of nanoparticles (NPs). Results: This nanocarrier revealed a controlled release of VNC in citrate and phosphate buffer solutions that were maintained at pH 5.5 and pH 7.4, respectively. The Inhibitory concentration (IC50) values were greater than 5 mg/mL and displayed ten times higher cytotoxicity than the comparable free drug concentration. The Caspase-9 and P53 expressions were increased, whereas P21 and AKt1 decreased noticeably in the treated cells. The results point to the possible activation of apoptosis following treatment with NPs loaded with vincristine