Synthesis and Cytotoxic Evaluation of 2-Pyrazoline Derivative on Leukemia Cancer Cell Line K562

The 2-pyrazoline derivatives have a wide range of biological effects, such as anti-viral, anti-bacterial, anti-fungal, anti-depressant and anti-cancer effects. Studies have shown that compounds containing 2-pyrazoline along with another heterocycles may show more effective biological properties. In this study, a 2-pyrazoline derivative with a spiro-indenoquinoxaline ring at C3 position was synthesized by one-pot microwave-assisted method and its chemical structure was confirmed by 1H NMR spectroscopy. The cytotoxic effects of the compound were evaluated on the K562 cell line and phytohemagglutinin-activated peripheral blood mononuclear cells (PHA+PBMC) by MTT assay. Additionally, the cytotoxic effects of cisplatin on these cells were investigated and compared with those of 2-pyrazoline. The IC50 values ​​obtained from the 2-pyrazoline derivative effects on the K562 cell line and PHA+PBMC cells were 45 and 55 μg/mL respectively, while cisplatin inhibited proliferation of the same cells with IC50 value 1.71 and 7.8 µg/mL respectively. The results of this study showed that the synthesized derivative had a cytotoxic activity on the K562 cancer cell line at higher concentrations than cisplatin

Photocatalytic degradation of coomassie blue G-250 by magnetic NiFe2_{{2}}O4_{{4}}/ZnO nanocomposite

Photocatalysts NiFe2O4, ZnO, and NiFe2O4/ZnO were successfully synthesized and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and vibrating sample magnetometry techniques. The prepared photocatalysts demonstrated significant photocatalytic efficiency under visible and UV light. The rate of dye degradation of NiFe2O4/ZnO in both UV and visible ranges exceeded that of ZnO and NiFe2O4. Moreover, NiFe2O4/ZnO exhibited the most excellent photocatalytic efficiency toward Coomassie blue G-250. The effect of pH on the dye degradation rate was also monitored. Accordingly, 96.90% and 68.55% dye degradation efficiencies were achieved by NiFe2O4/ZnO in 30 min under UV and visible light, respectively

Photocatalytic degradation of coomassie blue G-250 by magnetic NiFe2_{{2}}O4_{{4}}/ZnO nanocomposite

Photocatalysts NiFe2O4, ZnO, and NiFe2O4/ZnO were successfully synthesized and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and vibrating sample magnetometry techniques. The prepared photocatalysts demonstrated significant photocatalytic efficiency under visible and UV light. The rate of dye degradation of NiFe2O4/ZnO in both UV and visible ranges exceeded that of ZnO and NiFe2O4. Moreover, NiFe2O4/ZnO exhibited the most excellent photocatalytic efficiency toward Coomassie blue G-250. The effect of pH on the dye degradation rate was also monitored. Accordingly, 96.90% and 68.55% dye degradation efficiencies were achieved by NiFe2O4/ZnO in 30 min under UV and visible light, respectively

Synthesis of Hydroxyapatite/Ag/TiO2 Nanotubes and Evaluation of Their Anticancer Activity on Breast Cancer Cell Line MCF-7

In this research, TiO2 nanotubes were synthesized by anodized oxidation method and were covered with a hydroxyapatite-silver nanoparticles using photodeposition and dip coating for loading silver nanoparticles and coated hydroxyapatite (HA). The morphological texture of TiO2 nanotube and Ag-HA nanoparticles on TiO2 nanotubes surface were studied by field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDAX analysis) and X-ray diffraction (XRD). The MCF-7 cell lines were treated with concentrations 1, 10 and 100 µg/ml of TiO2 nanotubes and HA/Ag/TiO2 nanotube for 24 and 48h. Finally, the cell viability and IC50% were evaluated using MTT assay. The results show that the HA/Ag/TiO2 has more positive effect on enhancing the cell death compare to TiO2 nanotubes and also exerts a time and concentration-dependent inhibition effect on viability of MCF-7 cell

Molecular Detection of Staphylococcus aureus, S. epidermidis, and S. hominis Isolated from the Neonatal Umbilical Cord by Multiplex PCR Method

Background & objectives: Staphylococci are considered as one of the most important etiological agents of omphalitis. Due to the importance of early diagnosis of omphalitis in newborns, this infection can be diagnosed by novel techniques such as multiplex PCR which is rapid, cost- effective and more accurate than microbial culture. The aim of this study was to determine the frequency of Staphylococcus aureus, S. epidermidis and S.hominis species in umbilical cord infection in newborns. Methods: In the present study, 45 umbilical cord samples were collected from Shahid Afzali pour hospital in Kerman, Iran. Followed by DNA extraction, Multiplex PCR reactions were performed using specific 16srDNA primers for S. aureus, S. epidermidis and S.hominis. Finally, PCR products were analyzed using electrophoresis and sequencing. Also, microbiological and biochemical differentiation tests were performed for the diagnosis of Staphylococci on all specimens. Results: Amplification of 16srRNA genes for S. aureus, S. epidermidis, and S. hominis using Multiplex PCR demonstrated that the frequency of S. epidermidis ,S. aureus and S.hominis were 4.4%, 6.6% and 2.2% in the studied samples, respectively. The prevalence of staphylococcal isolates using differential tests was shown to be 33.3%. Conclusion: This study indicated that, Multiplex PCR is a proper method for simultaneous identification of S. aureus, S. epidermidis and S.hominis species. Also, Staphylococci can be considered as a significant cause of umbilical cord infection in newborns. However, further studies urgently are needed to confirm this finding

Application of cyclometalated rhodium(III) complexes as therapeutic agents in biomedical and luminescent cellular imaging

The synthesis and characterization of three [Rh(ppy)2(N^N)][PF6] complexes, [Rh(ppy)2(pybtz)][PF6].CH3OH (Rh1), [Rh(ppy)2(pzbtz)][PF6] (Rh2) and [Rh(ppy)2(qbtz)][PF6] (Rh3) [Hppy: 2-phenylpyridine; N^N: (pyridin-2-yl)benzo[d]thiazole (pybtz), (pyrazin-2-yl)benzo[d]thiazole (pzbtz), and (quinolin-2-yl)benzo[d]thiazole (qbtz)], and single crystal structures of Rh1 and Rh3 are reported. Rh1 and Rh3 show high fluorescent intensities upon excitation at 400 and 410 nm, respectively. Evaluation of lipophilicity by theoretical calculations indicates Rh3 > Rh1 > Rh2, introducing Rh3 as the best candidate for biological studies. The Rh3 exhibits anticancer activity, with high cellular uptake efficiency and good cytotoxicity against MCF-7 cell line as compared to the non-malignant MRC-5 cells. Flow cytometry have confirmed the apoptosis cell death and cell cycle arrest in the sub-G1 phase. The result of real time PCR shows that Rh3 induces apoptosis by up-regulating of p53, miR-15a, miR-16–1 and miR-29b and down regulating of bcl-2 and miR-21 at the level of RNA transcription. Importantly, cell imaging experiments have demonstrated that Rh3 can be considered as a new promising metallodrug candidate for cancer treatment

Application of cyclometalated rhodium(III) complexes as therapeutic agents in biomedical and luminescent cellular imaging

The synthesis and characterization of three [Rh(ppy)2(N^N)][PF6] complexes, [Rh(ppy)2(pybtz)][PF6].CH3OH (Rh1), [Rh(ppy)2(pzbtz)][PF6] (Rh2) and [Rh(ppy)2(qbtz)][PF6] (Rh3) [Hppy: 2-phenylpyridine; N^N: (pyridin-2-yl)benzo[d]thiazole (pybtz), (pyrazin-2-yl)benzo[d]thiazole (pzbtz), and (quinolin-2-yl)benzo[d]thiazole (qbtz)], and single crystal structures of Rh1 and Rh3 are reported. Rh1 and Rh3 show high fluorescent intensities upon excitation at 400 and 410 nm, respectively. Evaluation of lipophilicity by theoretical calculations indicates Rh3 > Rh1 > Rh2, introducing Rh3 as the best candidate for biological studies. The Rh3 exhibits anticancer activity, with high cellular uptake efficiency and good cytotoxicity against MCF-7 cell line as compared to the non-malignant MRC-5 cells. Flow cytometry have confirmed the apoptosis cell death and cell cycle arrest in the sub-G1 phase. The result of real time PCR shows that Rh3 induces apoptosis by up-regulating of p53, miR-15a, miR-16–1 and miR-29b and down regulating of bcl-2 and miR-21 at the level of RNA transcription. Importantly, cell imaging experiments have demonstrated that Rh3 can be considered as a new promising metallodrug candidate for cancer treatment