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Sharifi S, Barar J, Hejazi MS, Samadi N. Doxorubicin Changes Bax /Bcl-xL Ratio, Caspase-8 and 9 in Breast Cancer Cells. Adv Pharm Bull 2015; 5:351-9. [PMID: 26504757 DOI: 10.15171/apb.2015.049] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 11/20/2014] [Accepted: 03/01/2015] [Indexed: 12/16/2022] Open
Abstract
PURPOSE Doxorubicin is administrated as a single agent in first-line therapy of breast cancer to induce apoptosis in tumor cells. Bax, Bcl-xL, Caspase-8 and 9 proteins are involved in induction of apoptosis. The present study describes Bax, Bcl-xL gene expression and Caspase-8 and 9 protein levels in MCF-7 cells incubated with doxorubicin at different doses an incubation times. METHODS The cytotoxic effects of doxorubicin were studied using MTT assay. MCF-7 cells were treated with three concentrations of doxorubicin (0.1, 0.5, 1 μM) and incubated for 24, 48 and 72 hours then expression levels of Bax and Bcl-xL genes were elucidated by Real-time RT-PCR technique and protein levels of caspase-8 and caspase-9 proteins were measured using ELISA method. Morphological modifications of the cells were also monitored via light microscopic images. RESULTS Doxorubicin decreased the anti-apoptotic Bcl-xL and increased pro-apoptotic Bax mRNA levels. Doxorubicin induced a significant increase in Bax /Bcl-xL ratio in all doses and incubation times (p<0.05). Highest (more than 10 fold) increase in Bax /Bcl-xL ratio was revealed after 48 h incubation of the cells with in all doses of doxorubicin. Doxorubicin also increased caspase-9 level in a time and dose-dependent manner, while caspase-8 level didn't follow time and dose dependency pattern. CONCLUSION Our results confirm that doxorubicin induces mitochondrial-dependent apoptosis by down-regulation of Bcl-xL and up- regulation of Bax and caspase-9 expressions.
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Affiliation(s)
- Simin Sharifi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. ; Students' Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Jaleh Barar
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. ; Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Saeid Hejazi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. ; Faculty of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nasser Samadi
- Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran. ; Faculty of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran. ; Department of Biochemistry and Medical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Hajizadeh N, Sefidi Heris Y, Zununi Vahed S, Vallipour J, Hejazi MA, Golabi SM, Asadpour-Zeynali K, Hejazi MS. Biodegradation of Para Amino Acetanilide by Halomonas sp. TBZ3. Jundishapur J Microbiol 2015; 8:e18622. [PMID: 26495103 PMCID: PMC4609326 DOI: 10.5812/jjm.18622] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 06/04/2014] [Accepted: 06/14/2014] [Indexed: 12/07/2022] Open
Abstract
BACKGROUND Aromatic compounds are known as a group of highly persistent environmental pollutants. Halomonas sp. TBZ3 was isolated from the highly salty Urmia Lake of Iran. In this study, characterization of a new Halomonas isolate called Halomonas sp. TBZ3 and its employment for biodegradation of para-amino acetanilide (PAA), as an aromatic environmental pollutant, is described. OBJECTIVES This study aimed to characterize the TBZ3 isolate and to elucidate its ability as a biodegradative agent that decomposes PAA. MATERIALS AND METHODS Primarily, DNA-DNA hybridization between TBZ3, Halomonas denitrificans DSM18045T and Halomonas saccharevitans LMG 23976T was carried out. Para-amino acetanilide biodegradation was assessed using spectrophotometry and confirmed by gas chromatography-mass spectroscopy (GC-MS). Parameters effective on biodegradation of PAA were optimized by the Response Surface Methodology (RSM). RESULTS The DNA-DNA hybridization experiments between isolate TBZ3, H. denitrificans and H. saccharevitans revealed relatedness levels of 57% and 65%, respectively. According to GC-MS results, TBZ3 degrades PAA to benzene, hexyl butanoate, 3-methyl-1-heptanol and hexyl hexanoate. Temperature 32.92°C, pH 6.76, and salinity 14% are the optimum conditions for biodegradation with a confidence level of 95% (at level α = 0.05). CONCLUSIONS According to our results, Halomonas sp. TBZ3 could be considered as a biological agent for bioremediation of PAA and possibly other similar aromatic compounds.
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Affiliation(s)
- Nader Hajizadeh
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, IR Iran
- Department of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, IR Iran
| | - Youssof Sefidi Heris
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, IR Iran
- Department of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, IR Iran
| | - Sepideh Zununi Vahed
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, IR Iran
- Faculty of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, IR Iran
| | - Javad Vallipour
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, IR Iran
| | - Mohammad Amin Hejazi
- Branch for the Northwest and West Region, Agriculture Biotechnology Research Institute of Iran (ABRII), Tabriz, IR Iran
| | - Sayyed Mahdi Golabi
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, IR Iran
| | - Karim Asadpour-Zeynali
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, IR Iran
| | - Mohammad Saeid Hejazi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, IR Iran
- Faculty of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, IR Iran
- Corresponding author: Mohammad Saeid Hejazi, Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, IR Iran. Tel: +98-4133372256, Fax: +98-413334 4798, E-mail:
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Hejazi MS, Majidi MR, Gholizadeh S, Hamidi-Asl E, Turner APF, Golabi SM. Effect of Electrophoresis on the Efficiency of Graphite-Nano-TiO2 Modified Silica Sol-Gel Electrode. J Nanosci Nanotechnol 2015; 15:3405-3410. [PMID: 26504958 DOI: 10.1166/jnn.2015.10215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Electrophoresis treatment was used to improve the function of a nano-TiO2 modified sol-gel electrode. Electrodes were prepared using TiO2 nanoparticles and fine graphite powder and then treated by electrophoresis. The developed electrode was employed for the detection of lactate dehydrogenase (LDH) by following the decrease in the immobilised lactate peak current due to its LDH-mediated enzymatic oxidation. Detection was realised using square wave voltammetry (SWV). Experiments showed that the positive and negative heads of the electrophoresis-treated electrode displayed different activities, with the positive head response being remarkably improved. Parameters affecting the electrode response, such as applied potential value, electrophoresis time and percentage of TiO2, were investigated and optimised. The improved performance was dependent on TiO2 concentration as well as electrophoresis voltage and time. The prepared sensor, under optimised conditions, displayed a detection limit of 0.0073 U/μl for LDH.
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Hamidi-Asl E, Raoof JB, Hejazi MS, Sharifi S, Golabi SM, Palchetti I, Mascini M. A Genosensor for Point Mutation Detection of P53 Gene PCR Product Using Magnetic Particles. ELECTROANAL 2015. [DOI: 10.1002/elan.201400660] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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55
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Sharifi S, Barar J, Hejazi MS, Samadi N. Roles of the Bcl-2/Bax Ratio, Caspase-8 and 9 in Resistance of Breast Cancer Cells to Paclitaxel. Asian Pac J Cancer Prev 2014; 15:8617-22. [DOI: 10.7314/apjcp.2014.15.20.8617] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Mehdizadeh Aghdam E, Barzegar A, Hejazi MS. Evolutionary Origin and Conserved Structural Building Blocks of Riboswitches and Ribosomal RNAs: Riboswitches as Probable Target Sites for Aminoglycosides Interaction. Adv Pharm Bull 2014; 4:225-35. [PMID: 24754005 DOI: 10.5681/apb.2014.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 11/24/2013] [Accepted: 11/26/2013] [Indexed: 12/29/2022] Open
Abstract
PURPOSE Riboswitches, as noncoding RNA sequences, control gene expression through direct ligand binding. Sporadic reports on the structural relation of riboswitches with ribosomal RNAs (rRNA), raises an interest in possible similarity between riboswitches and rRNAs evolutionary origins. Since aminoglycoside antibiotics affect microbial cells through binding to functional sites of the bacterial rRNA, finding any conformational and functional relation between riboswitches/rRNAs is utmost important in both of medicinal and basic research. METHODS Analysis of the riboswitches structures were carried out using bioinformatics and computational tools. The possible functional similarity of riboswitches with rRNAs was evaluated based on the affinity of paromomycin antibiotic (targeting "A site" of 16S rRNA) to riboswitches via docking method. RESULTS There was high structural similarity between riboswitches and rRNAs, but not any particular sequence based similarity between them was found. The building blocks including "hairpin loop containing UUU", "peptidyl transferase center conserved hairpin A loop"," helix 45" and "S2 (G8) hairpin" as high identical rRNA motifs were detected in all kinds of riboswitches. Surprisingly, binding energies of paromomycin with different riboswitches are considerably better than the binding energy of paromomycin with "16S rRNA A site". Therefore the high affinity of paromomycin to bind riboswitches in comparison with rRNA "A site" suggests a new insight about riboswitches as possible targets for aminoglycoside antibiotics. CONCLUSION These findings are considered as a possible supporting evidence for evolutionary origin of riboswitches/rRNAs and also their role in the exertion of antibiotics effects to design new drugs based on the concomitant effects via rRNA/riboswitches.
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Affiliation(s)
- Elnaz Mehdizadeh Aghdam
- Drug Applied Research Center and Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegar
- Research Institute for Fundamental Sciences (RIFS), University of Tabriz, Tabriz, Iran. ; The School of Advanced Biomedical Sciences (SABS), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Saeid Hejazi
- Drug Applied Research Center and Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. ; The School of Advanced Biomedical Sciences (SABS), Tabriz University of Medical Sciences, Tabriz, Iran
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57
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Naziri D, Hamidi M, Hassanzadeh S, Tarhriz V, Maleki Zanjani B, Nazemyieh H, Hejazi MA, Hejazi MS. Analysis of Carotenoid Production by Halorubrum sp. TBZ126; an Extremely Halophilic Archeon from Urmia Lake. Adv Pharm Bull 2013; 4:61-7. [PMID: 24409411 DOI: 10.5681/apb.2014.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 09/26/2013] [Accepted: 09/28/2013] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Carotenoids are of great interest in many scientific disciplines because of their wide distribution, diverse functions and interesting properties. The present report describes a new natural source for carotenoid production. METHODS Halorubrum sp., TBZ126, an extremely halophilic archaeon, was isolated from Urmia Lack following culture of water sample on marine agar medium and incubation at 30 °C. Then single colonies were cultivated in broth media. After that the cells were collected and carotenoids were extracted with acetone-methanol (7:3 v/v). The identification of carotenoids was performed by UV-VIS spectroscopy and confirmed by thin layer chromatography (TLC) in the presence of antimony pentachloride (SbCl5). The production profile was analyzed using liquid-chromatography mass spectroscopy (LC-MS) techniques. Phenotypic characteristics of the isolate were carried out and the 16S rRNA gene was amplified using polymerase chain reaction (PCR). RESULTS LC-MS analytical results revealed that produced carotenoids are bacterioruberin, lycopene and β-carotene. Bacterioruberin was found to be the predominant produced carotenoid. 16S rRNA analysis showed that TBZ126 has 100% similarity with Halorubrum chaoviator Halo-G*T (AM048786). CONCLUSION Halorubrum sp. TBZ126, isolated from Urmia Lake has high capacity in the production of carotenoids. This extremely halophilic archaeon could be considered as a prokaryotic candidate for carotenoid production source for future studies.
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Affiliation(s)
- Davood Naziri
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. ; Department of Agricultural Biotechnology, Faculty of Agriculture, Zanjan University, Zanjan, Iran
| | - Masoud Hamidi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. ; Students' Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Salar Hassanzadeh
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahideh Tarhriz
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Bahram Maleki Zanjani
- Department of Agricultural Biotechnology, Faculty of Agriculture, Zanjan University, Zanjan, Iran
| | - Hossein Nazemyieh
- Department of Pharmacognosy, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammd Amin Hejazi
- Branch for Northwest & West Region, Agricultural Biotechnology Research Institute of Iran (ABRII), Tabriz, Iran
| | - Mohammad Saeid Hejazi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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58
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Hamidi-Asl E, Raoof JB, Ojani R, Hejazi MS. Indigo Carmine as New Label in PNA Biosensor for Detection of Short Sequence of p53 Tumor Suppressor Gene. ELECTROANAL 2013. [DOI: 10.1002/elan.201300155] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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59
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Mahmoudi Azar L, Mehdizadeh Aghdam E, Karimi F, Haghshenas B, Barzegari A, Yaghmaei P, Hejazi MS. Influence of Foreign DNA Introduction and Periplasmic Expression of Recombinant Human Interleukin-2 on Hydrogen Peroxide Quantity and Catalase Activity in Escherichia coli. Adv Pharm Bull 2013; 3:395-402. [PMID: 24312866 PMCID: PMC3848214 DOI: 10.5681/apb.2013.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 04/18/2013] [Accepted: 04/22/2013] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Oxidative stress is generated through imbalance between composing and decomposing of reactive oxygen species (ROS). This kind of stress was rarely discussed in connection with foreign protein production in Escherichia coli. Effect of cytoplasmic recombinant protein expression on Hydrogen peroxide concentration and catalase activity was previously reported. In comparison with cytoplasm, periplasmic space has different oxidative environment. Therefore, in present study we describe the effect of periplasmic expression of recombinant human interleukin-2 (hIL-2) on H2O2 concentration and catalase activity in Escherichia coli and their correlation with cell growth. METHODS Having constructed pET2hIL2 vector, periplasmic expression of hIL-2 was confirmed. Then, H2O2 concentration and catalase activity were determined at various ODs. Wild type and empty vector transformed cells were used as negative controls. RESULTS It was shown that H2O2 concentration in hIL-2 expressing cells was significantly higher than its concentration in wild type and empty vector transformed cells. Catalase activity and growth rate reduced significantly in hIL-2 expressing cells compared to empty vector transformed and wild type cells. Variation of H2O2 concentration and catalase activity is intensive in periplasmic hIL-2 expressing cells than empty vector containing cells. Correlation between H2O2 concentration elevation and catalase activity reduction with cell growth depletion are also demonstrated. CONCLUSION Periplasmic expression of recombinant hIL-2 elevates the host cell's hydrogen peroxide concentration possibly due to reduced catalase activity which has consequent suppressive effect on growth rate.
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Affiliation(s)
- Lena Mahmoudi Azar
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elnaz Mehdizadeh Aghdam
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farrokh Karimi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Biotechnology, Faculty of Science, Maragheh University, Maragheh, Iran
| | - Babak Haghshenas
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Institute of Bioscience, University of Putra Malaysia, Kualalumpur, Malaysia
| | - Abolfazl Barzegari
- Research Center of Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Mohammad Saeid Hejazi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Faculty of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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Hamidi-Asl E, Raoof JB, Ojani R, Golabi SM, Hejazi MS. A new peptide nucleotide acid biosensor for electrochemical detection of single nucleotide polymorphism in duplex DNA via triplex structure formation. J IRAN CHEM SOC 2013. [DOI: 10.1007/s13738-013-0254-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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61
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Ahour F, Pournaghi-Azar MH, Alipour E, Hejazi MS. Detection and discrimination of recombinant plasmid encoding hepatitis C virus core/E1 gene based on PNA and double-stranded DNA hybridization. Biosens Bioelectron 2013; 45:287-91. [PMID: 23500377 DOI: 10.1016/j.bios.2013.01.063] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 01/29/2013] [Accepted: 01/30/2013] [Indexed: 12/15/2022]
Abstract
Development of an electrochemical DNA biosensor for direct detection and discrimination of double-stranded plasmid (ds-Pl) without the need for denaturation of the target plasmid sample using a peptide nucleic acid (PNA) oligomer as the probe is described. This goal was achieved by modification of gold electrode with 6-mercapto-1-hexanol following monolayer self-assembly of cysteine conjugated 20-mer PNA oligomer probe, complementary to the HCV core/E1 region, which binds to ds-Pl and forms PNA/ds-Pl structure. The significant variation in differential pulse voltammetric response of methylene blue on the probe modified electrode upon contacting with complementary double-strand plasmid to form PNA/ds-Pl triplex structure is the principle of target plasmid detection. The results indicated that the reduction peak current was linear with the concentration of complementary strand in the range of 10-300 pg/μl with a detection limit of 9.5 pg/μl.
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Affiliation(s)
- Fatemeh Ahour
- Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
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Ghotaslou R, Milani M, Akhi MT, Nahaei MR, Hasani A, Hejazi MS, Meshkini M. Diversity of Helicobacter Pylori cagA and vacA Genes and Its Relationship with Clinical Outcomes in Azerbaijan, Iran. Adv Pharm Bull 2013; 3:57-62. [PMID: 24312813 DOI: 10.5681/apb.2013.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 10/07/2012] [Accepted: 10/07/2012] [Indexed: 12/11/2022] Open
Abstract
PURPOSE The purpose of this research was to analyze cagA and vacA genotypes status in H. pylori isolates and relationship with clinical outcomes. METHODS Gastric biopsy specimens were cultured for H. pylori isolation and cagA and vacA genes were detected in these isolates. Data were collected and the results were analyzed using χ2 and Fishers exact tests by SPSS software version. 16. RESULTS Of the total 115 H. pylori isolates, 79 (68.7 %) were cagA positive and 82 (71.3%) of isolates contained the s1 allele which 33 (28.7%) were subtype s2. s1m2 was the most frequent vacA allelic combination in the H. pylori isolates examined (63 cases), followed by s2m2 (31 cases), s1m1 (19 cases) and s2m1 (2 case). Strains cagA positive were more frequent in peptic ulcer diseases patients than non ulcer diseases patients, as 47 (59.5%) and 32 (40.5%), while cagA negative were low, as 15 (41.7%) and 21 (58.3%), respectively. CONCLUSION We found that the cagA and vacA status were not related to clinical outcomes in this area. Overall, in the present study, vacA s1/m2, cagA-positive strains were predominant irrespective of clinical outcome, but s2/m1 was rare.
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Affiliation(s)
- Reza Ghotaslou
- Liver and Gastroenterology Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. ; Department of Microbiology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Ghotaslou R, Yeganeh Sefidan F, Akhi MT, Soroush MH, Hejazi MS. Detection of legionella contamination in tabriz hospitals by PCR assay. Adv Pharm Bull 2013; 3:131-4. [PMID: 24312825 DOI: 10.5681/apb.2013.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 11/07/2012] [Accepted: 11/07/2012] [Indexed: 11/17/2022] Open
Abstract
PURPOSE The present study was designed to evaluate the occurrence of Legionella contamination in the tap water of Tabriz hospitals, Azerbaijan, Iran. METHODS One hundred and forty water samples from diverse water supply systems of 17 hospitals were collected and analyzed for the presence of Legionella spp. by PCR assay. RESULTS In this study, 10 of 140 (7.1%) samples were positive for Legionella which L. pneumophila was detected in 4 (2.85%) water samples. CONCLUSION In conclusion, hospital potable systems are the primary reservoirs for Legionnaires' disease. This study concludes that Legionella spp. are present in aquatic hospitals environment of Tabriz. Due to the serious risk of infections, it is better to make efforts to eliminate Legionella spp. in water supplies.
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Affiliation(s)
- Reza Ghotaslou
- Tropical and Infectious Diseases Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran. ; Department of Microbiology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Mehdizadeh Aghdam E, Mahmoudi Azar L, Barzegari A, Karimi F, Mesbahfar M, Samadi N, Hejazi MS. Effect of periplasmic expression of recombinant mouse interleukin-4 on hydrogen peroxide concentration and catalase activity in Escherichia coli. Gene 2012; 511:455-60. [PMID: 23000065 DOI: 10.1016/j.gene.2012.09.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 05/10/2012] [Accepted: 09/05/2012] [Indexed: 11/16/2022]
Abstract
Oxidative stress occurs as a result of imbalance between generation and detoxification of reactive oxygen species (ROS). This kind of stress was rarely discussed in connection with foreign protein production in Escherichia coli. Relation between cytoplasmic recombinant protein expression with H(2)O(2) concentration and catalase activity variation was already reported. The periplasmic space of E. coli has different oxidative environment in relative to cytoplasm and there are some benefits in periplasmic expression of recombinant proteins. In this study, hydrogen peroxide concentration and catalase activity following periplasmic expression of mouse IL-4 were measured in E. coli. After construction of pET2mIL4 plasmid, the expression of recombinant mouse interleukin-4 (mIL-4) was confirmed. Then, the H(2)O(2) concentration and catalase activity variation in the cells were studied in exponential and stationary phases at various ODs and were compared to those of wild type cells and empty vector transformed cells. It was revealed that empty vector introduction and periplasmic recombinant protein expression increased significantly the H(2)O(2) concentration of the cells. However, the H(2)O(2) concentration in mIL-4 expressing cells was significantly higher than its concentration in empty vector transformed cells, demonstrating more effects of recombinant mIL-4 expression on H(2)O(2) elevation. Likewise, although catalase activity was reduced in foreign DNA introduced cells, it was more lowered following expression of recombinant proteins. Correlation between H(2)O(2) concentration elevation and catalase activity reduction with cell growth depletion is also demonstrated. It was also found that recombinant protein expression results in cell size increase.
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Affiliation(s)
- Elnaz Mehdizadeh Aghdam
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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Tarhriz V, Nematzadeh G, Zununi Vahed S, Hejazi MA, Hejazi MS. Alishewanella tabrizica sp. nov., isolated from Qurugöl Lake. Int J Syst Evol Microbiol 2012; 62:1986-1991. [DOI: 10.1099/ijs.0.031567-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel Gram-negative, aerobic, motile and rod-shaped bacterium was isolated from Qurugöl Lake located in a mountainous region near Tabriz city in the north-west of Iran. Growth occurred at pH 6–10 (optimum, pH 7±0.5) and at 10–40 °C (optimum, 30 °C). Strain RCRI4T was able to grow in the absence and presence of NaCl to 3 % (w/v). The major fatty acids were C17 : 0, C16 : 1ω7c/C15 iso3-OH, C17 : 1ω8c and C16 : 0. The G+C content of genomic DNA was 45.3 mol%. Based on the 16S rRNA and gyrB gene sequences, phylogenetic analyses indicated that strain RCRI4T associated with the genus
Alishewanella
, and closely related type strains include
Alishewanella agri
BLO6T (97.8 %),
Alishewanella aestuarii
B11T (97.7 %),
Rheinheimera perlucida
BA131T (97.5 %),
Alishewanella fetalis
CCUG 30811T (97.3 %) and
Alishewanella jeotgali
MS1T (97.1 %). The level of DNA–DNA relatedness between strain RCRI4T and phylogenetically the closest related strains,
A. agri
BLO6T and
R. perlucida
BA131T, was 9 and 14 %, respectively. On the basis of phenotypic, chemotaxonomic and phylogenetic results, it is suggested that strain RCRI4T represents a novel species of the genus
Alishewanella
, for which the name Alishewanella tabrizica sp. nov. is proposed. The type strain is RCRI4T ( = LMG 26473T = JCM 17275T = KCTC 23723T).
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Affiliation(s)
- Vahideh Tarhriz
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Rice and Citrus Research Institute (RCRI), Sari, Iran
| | - Ghorbanali Nematzadeh
- Faculty of Agriculture, Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran
- Rice and Citrus Research Institute (RCRI), Sari, Iran
| | - Sepideh Zununi Vahed
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Amin Hejazi
- Agricultural Biotechnology Research Institute (ABRII) for Northwest and West of Iran, Tabriz, Iran
| | - Mohammad Saeid Hejazi
- Faculty of Advanced Biomedical Sciences, Tabriz University of Medical Sciences & Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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Vahed SZ, Forouhandeh H, Hassanzadeh S, Klenk HP, Hejazi MA, Hejazi MS. Isolation and characterization of halophilic bacteria from Urmia Lake in Iran. Microbiology (Reading) 2011. [DOI: 10.1134/s0026261711060191] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Vahed SZ, Forouhandeh H, Hassanzadeh S, Klenk HP, Hejazi MA, Hejazi MS. Isolation and characterization of halophilic bacteria from Urmia Lake in Iran. Mikrobiologiia 2011; 80:826-833. [PMID: 22393767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Urmia Lake is one of the most permanent hypersaline lakes in the world which is threatened by hypersalinity and serious dryness. In spite of its importance no paper has been published regarding bacterial community of this lake. Accordingly, the present study aimed to investigate the halophilic bacteria in the aforementioned lake. In so doing, thirty seven strains were isolated on six different culture media. The isolated strains were characterized using phenotypic and genotypic methods. Growth of the strains occurred at 2535 degrees C, pH 6-9 and 7 to 20% (w/v) NaCl indicating that most of the isolates were moderately halophiles. Catalase, oxidase and urease activities were found to be positive for the majority of the isolates. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolated bacteria belonged to two major taxa: Gammaproteobacteria (92%, including Salicola [46%], Pseudomonas [13.5%], Marinobacter [ 11%], Idiomarina [11%], and Halomonas [8%]) and Firmicutes (8%, including Bacillus [5%] and Halobacillus [3%]). In addition, a novel bacterium whose 16S rRNA gene sequence showed almost 98% sequence identity with the taxonomically troubled DSM 3050T, Halovibrio denitrificans HGD 3T and Halospina denitrificans HGD 1-3T, each, was isolated. 16S rRNA gene similarity levels along with phenotypic characteristics suggest that some of the isolated strains could be regarded as potential type strain for novel species, on which further studies are recommended.
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Affiliation(s)
- Sepideh Zununi Vahed
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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Nasirizadeh N, Zare HR, Pournaghi-Azar MH, Hejazi MS. Introduction of hematoxylin as an electroactive label for DNA biosensors and its employment in detection of target DNA sequence and single-base mismatch in human papilloma virus corresponding to oligonucleotide. Biosens Bioelectron 2010; 26:2638-44. [PMID: 21146975 DOI: 10.1016/j.bios.2010.11.026] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2010] [Accepted: 11/17/2010] [Indexed: 01/21/2023]
Abstract
For the detection of DNA hybridization, a new electrochemical biosensor was developed on the basis of the interaction of hematoxylin with 20-mer deoxyoligonucleotides (from human papilloma virus, HPV). The study was performed based on the interaction of hematoxylin with an alkanethiol DNA probe self-assembled gold electrode (ss-DNA/AuE) and its hybridization form (ds-DNA/AuE). The optimum conditions were found for the immobilization of HPV probe on the gold electrode (AuE) surface and its hybridization with the target DNA. Electrochemical detection of the self-assembled DNA and the hybridization process were performed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) over the potential range where the accumulated hematoxylin at the modified electrode was electroactive. Observing a remarkable difference between the voltammetric signals of the hematoxylin obtained from different hybridization samples (non-complementary, mismatch and complementary DNAs), we confirmed the potential of the developed biosensor in detecting and discriminating the target complementary DNA from non-complementary and mismatch oligonucleotides. Under optimum conditions, the electrochemical signal had a linear relationship with the concentration of the target DNA ranging from 12.5 nM to 350.0 nM, and the detection limit was 3.8 nM.
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Affiliation(s)
- Navid Nasirizadeh
- Department of Chemistry, Yazd University, P.O. Box 89195-741, Yazd, Iran
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Hejazi MS, Pournaghi-Azar MH, Alipour E, Abdolahinia ED, Arami S, Navvah H. Development of a Novel Electrochemical Biosensor for Detection and Discrimination of DNA Sequence and Single Base Mutation in dsDNA Samples Based on PNA-dsDNA Hybridization - a new Platform Technology. ELECTROANAL 2010. [DOI: 10.1002/elan.201000413] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Pournaghi-Azar MH, Ahour F, Hejazi MS. Direct detection and discrimination of double-stranded oligonucleotide corresponding to hepatitis C virus genotype 3a using an electrochemical DNA biosensor based on peptide nucleic acid and double-stranded DNA hybridization. Anal Bioanal Chem 2010; 397:3581-7. [PMID: 20563795 DOI: 10.1007/s00216-010-3875-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 05/16/2010] [Accepted: 05/24/2010] [Indexed: 12/15/2022]
Abstract
Development of an electrochemical DNA biosensor for the direct detection and discrimination of double-stranded oligonucleotide (dsDNA) corresponding to hepatitis C virus genotype 3a, without its denaturation, using a gold electrode is described. The electrochemical DNA sensor relies on the modification of the gold electrode with 6-mercapto-1-hexanol and a self-assembled monolayer of 14-mer peptide nucleic acid probe, related to the hepatitis C virus genotype 3a core/E1 region. The increase of differential pulse voltammetric responses of methylene blue, upon hybridization of the self-assembled probe with the target ds-DNA to form a triplex is the principle behind the detection and discrimination. Some hybridization experiments with non-complementary oligonucleotides were carried out to assess whether the developed DNA sensor responds selectively to the ds-DNA target. Diagnostic performance of the biosensor is described and the detection limit was found to be 1.8 x 10(-12) M in phosphate buffer solution, pH 7.0. The relative standard deviation of measurements of 100 pM of target ds-DNA performed with three independent probe-modified electrodes was 3.1%, indicating a remarkable reproducibility of the detection method.
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Affiliation(s)
- M H Pournaghi-Azar
- Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Tabriz, Bd. 29 Bahman, 51666-14776 Tabriz, Iran.
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Hejazi MS, Pournaghi-Azar MH, Ahour F. Electrochemical detection of short sequences of hepatitis C 3a virus using a peptide nucleic acid-assembled gold electrode. Anal Biochem 2009; 399:118-24. [PMID: 19931215 DOI: 10.1016/j.ab.2009.11.019] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2009] [Revised: 11/15/2009] [Accepted: 11/16/2009] [Indexed: 12/12/2022]
Abstract
Development of an electrochemical DNA biosensor, using a gold electrode modified with a self-assembled monolayer composed of a peptide nucleic acid (PNA) probe and 6-mercapto-1-hexanol, is described. The sensor relies on covalent attachment of the 14-mer PNA probe related to the hepatitis C virus genotype 3a (pHCV3a) core/E1 region on the electrode. Covalently self-assembled PNA could selectively hybridize with a complementary sequence in solution to form double-stranded PNA-DNA on the surface. The increase of peak current of methylene blue (MB), upon hybridization of the self-assembled probe with the target DNA in the solution, was observed and used to detect the target DNA sequence. Some hybridization experiments with noncomplementary oligonucleotides were carried out to assess whether the suggested DNA sensor responds selectively to the target. Diagnostic performance of the biosensor is described and the detection limit was found to be 5.7 x 10(-11)M with a relative standard deviation of 1.4% in phosphate buffer solution, pH 7.0. This sensor exhibits high reproducibility and could be used for detection of the target DNA for seven times after the regeneration process.
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Affiliation(s)
- M S Hejazi
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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Ebrahimi AA, Noshad H, Sadreddini S, Hejazi MS, Mohammadzadeh Sadigh Y, Eshraghi Y, Ghojazadeh M. Serum levels of TNF-alpha, TNF-alphaRI, TNF-alphaRII and IL-12 in treated rheumatoid arthritis patients. Iran J Immunol 2009; 6:147-153. [PMID: 19801788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
BACKGROUND Rheumatoid arthritis (RA) is a chronic multisystem autoimmune disease common in all races and ethnics. Cytokines and cytokines receptors play an important role in RA pathogenesis and clinical presentation. OBJECTIVE To investigate the serum levels of TNF-alpha, TNF-alpha RI, TNF-alpha RII and IL-12 in RA patients and healthy control group. METHODS In this study 43 patients fulfilling the revised criteria of American College of Rheumatology (ACR) for RA and 13 healthy cases as a control group were selected for TNF-alpha, TNF-alphaRI, TNF-alphaRII and IL-12 serum level analysis. The patients' age was 42.2 +/- 22 and the age of healthy group was 40.1 +/- 19.2 years (p=0.1). The patients had an active disease with at least six swollen and ten tender joints. Minimum ESR was 28 mm at first hours of the morning. Early morning stiffness in patients lasted longer than 45 minutes. RESULTS Our study showed that IL-12 serum level of the patients (91.69 +/- 43.07 rhog/ml) and control (61.79 +/- 40.08 rhog/ml) group was significantly different (p<0.001). The serum level of TNF-alphaRI was 2.36 +/- 0.77 ng/ml in the patient and 1.73 +/- 0.37 ng/ml in the control group (p<0.01). TNF-alphaRII serum concentration in patients was 8.89 +/- 2.3 ng/ml, while that of control group was 7.06+/-1.30 ng/ml (p=0.03). The serum level of TNF-alpha in patients was 32.90 +/- 19.27 rhog/ml and that of the control group was 24.27+/- 8.28 rhog/ml (p=0.08) with no significant difference between the two. CONCLUSIONS It is concluded that IL-12, TNF-alphaRI and TNF- alphaRII serum concentrations are more important and better predictive factors than TNF-alpha in RA course and in the active forms of the disease.
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Pournaghi-Azar MH, Alipour E, Zununi S, Froohandeh H, Hejazi MS. Direct and rapid electrochemical biosensing of the human interleukin-2 DNA in unpurified polymerase chain reaction (PCR)-amplified real samples. Biosens Bioelectron 2008; 24:524-30. [PMID: 18617384 DOI: 10.1016/j.bios.2008.05.008] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Revised: 05/02/2008] [Accepted: 05/20/2008] [Indexed: 10/22/2022]
Abstract
Electrochemical detection of polymerase chain reaction (PCR)-amplified human interleukin-2 (IL-2) coding DNA sample (399bp size) without any purification and pre-treatment is described. To achieve this goal, a sensor was made by immobilization of a 20-mer oligonucleotide (chIL-2) as the probe on the pencil graphite electrode (PGE). This probe is related to the antisense strand of human interleukin-2 gene. The results showed that the electrode could effectively sense the PCR product of human interleukin-2 DNA by anodic differential pulse voltammetry (ADPV) based on guanine oxidation signal. In order to inhibit PCR components interfering effects and improve biosensing performance, various factors were investigated. We found that the desorption of non-specifically adsorbed components of the unpurified PCR samples from PGE surface is easily achieved by washing of the electrode in washing solution for about 300s. The effectiveness of this procedure was confirmed using purified PCR samples. The selectivity of the sensor was assessed with negative control PCR sample and seven different non-complementary PCR products corresponding to 16S rDNA (bigger than 1500bp) of various bacterial genuses. Diagnostic performance of the biosensor is described and the detection limit is found to be 69pM. The reliability of the electrochemical biosensing results was verified by electrophoresis of the PCR products.
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Hejazi MS, Pournaghi-Azar MH, Alipour E, Karimi F. Construction, electrochemically biosensing and discrimination of recombinant plasmid (pEThIL-2) on the basis of interleukine-2 DNA insert. Biosens Bioelectron 2008; 23:1588-94. [PMID: 18316186 DOI: 10.1016/j.bios.2008.01.021] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Revised: 01/08/2008] [Accepted: 01/14/2008] [Indexed: 01/20/2023]
Abstract
Construction, electrochemically biosensing and discrimination of recombinant pEThIL-2 plasmid, with 5839bp size, on the basis of interleukine-2 (IL-2) DNA insert are described. Plasmid pEThIL-2 was constructed by PCR amplification of IL-2 encoding DNA and subcloning into pET21a(+) vector using BamHI and SacI sites. The recombinant pEThIL-2 plasmid was detected with a label-free DNA hybridization biosensor using a non-inosine substituted probe. The proposed sensor was made up by immobilization of a 20-mer antisense single strand oligonucleotide (chIL-2) related to the human interleukine-2 gene on the pencil graphite electrode (PGE) as a probe and then the sensing of recombinant pEThIL-2 plasmid was conducted by anodic differential pulse voltammetry (ADPV) based on guanine oxidation signal. Selectivity of the detection was assessed with pET21a(+) non-complementary plasmid, with 5443bp size, lacking IL-2 encoding DNA. Different factors such as electrode activation conditions and washing strategy were tested in order to eliminate the nonspecific adsorption of pET21a(+). We have found that the PGE activation for 300s produces a condition in which desorption of nonspecifically adsorbed plasmids from the electrode surface can be achieved by 300s washing of the electrode in 20mM Tris-HCl buffer solution (pH 7.0) containing 20mM NaCl. Diagnostic performance of the biosensor is described and the detection limit is found to be 10.31pg/microL.
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Hejazi MS, Sioofy Khojine AB. Influence of E1-deleted recombinant adenoviruses on B7.1 and IL-2 expression in C1498 cells. Iran Biomed J 2007; 11:153-160. [PMID: 18051775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND Knowing that adenoviral vectors could initiate innate immunity, the ability of E1-deleted recombinant adenovirus (Ad-E1Delta) in induction of B7.1 and IL-2 molecules was studied. METHODS The expression of green fluorescent protein in C1498 cells following transfection of these cells with adenovirus green fluorescent protein vector confirmed the ability of adenovirus vectors in infecting the cells and inducing the expression of the gene of interest. The expression of B7.1 molecule on the surface of the cells was assayed upon infection with Ad-E1Delta vector. Adenovirus-IL-2/B7.1 vector capable of inducing IL-2 and B7.1 expression in the cells was used as the positive control vector. RESULTS According to the FACS results, about 4.17% of normal cells expressed B7.1 on their surface, while this level was increased in Ad-E1Δ transduced cells up to 14.43%. These results demonstrate that Ad E1∆ vector considerably (about 3 folds) increases the expression of B7.1 on the cells. No detectable IL-2 was secreted into the medium of non-transduced and Ad-E1Δ transduced cellscells. CONCLUSION Data indicate that the infection of C1498 cells with recombinant adenoviruses stimulates expression of B7.1 on the cell surface rather than secretion of IL-2 into the medium.
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Affiliation(s)
- Mohammad Saeid Hejazi
- Dept. of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Drug Applied Research Centre and Biotechnology Research Centre, Tabriz, Iran
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Bashir NS, Zarghani SN, Hejazi MS. Diversity of Grapevine fanleaf virus isolates from Iran. Virus Res 2007; 128:144-8. [PMID: 17521761 DOI: 10.1016/j.virusres.2007.04.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Revised: 03/09/2007] [Accepted: 04/12/2007] [Indexed: 10/23/2022]
Abstract
Enzyme-linked immunosorbent assay (ELISA) testing of 126 grapevine samples, from vineyards in the northwest region of Iran, detected Grapevine fanleaf virus (GFLV) in 33 samples. Total RNA from eight of the infected samples were subjected to reverse transcription polymerase chain reaction (RT-PCR) analysis using primers which corresponded to the virus coat protein and 3' non coding region of RNA 2. An expected 1620 bp DNA fragment was amplified from all the tested samples. PCR products from isolates B5, S1 and SH3 were cloned and the nucleotide sequences of three clones from each isolate were determined. The sequences showed that a DNA fragment of 1623 bp from isolate S1 and 1629bp from isolates B5 and SH3 were amplified. The fragments covered 1481 nucleotides of the 3' proximal region of the CP gene plus 142 or 148 nucleotides of the 3' non coding region. Alignment of the sequences revealed over 99% identities among clones from each isolate and 83-93% among clones from different isolates. Identities of 83-94% were found between the isolates from Iran and previously reported GFLV strains/isolates. Phylogenetic analysis based on CP sequences showed that isolates S1 and SH3 formed a distinct cluster but isolate B5 clustered with previously reported GFLV strains. This is the first report on sequence analysis of nearly full-length CP cDNA clones of GFLV isolates from Iran.
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Pournaghi-Azar MH, Hejazi MS, Alipour E. Developing an electrochemical deoxyribonucleic acid (DNA) biosensor on the basis of human interleukine-2 gene using an electroactive label. Anal Chim Acta 2006; 570:144-50. [PMID: 17723392 DOI: 10.1016/j.aca.2006.04.067] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2006] [Revised: 04/05/2006] [Accepted: 04/06/2006] [Indexed: 11/25/2022]
Abstract
Development of an electrochemical DNA biosensor based on a human interleukine-2 (IL-2) gene probe, using a pencil graphite electrode (PGE) as transducer and methylene blue (MB) as electroactive label is described. The sensor relies on the immobilization of a 20-mer single stranded oligonucleotide probe (hIL-2) related to the IL-2 gene on the electrode. The hybridization between the probe and its complementary sequence (chIL-2) as the target was studied by square wave voltammetry (SWV) of MB accumulated on the PGE. In this approach the extent of hybridization is evaluated on the basis of the difference between SWV signals of MB accumulated on the probe-PGE and MB accumulated on the probe-target-PGE. Some hybridization experiments with non-complementary oligonucleotides were carried out to assess whether the suggested DNA sensor responds selectively to the target. Some experimental variables affecting the performance of the biosensor including: polishing of PGE, its electrochemical activation conditions (i.e., activation potential and activation time) and probe immobilization conditions on the electrodes (i.e., immobilization potential and time) were investigated and the optimum values of 1.80 V and 300 s for PGE activation, and -0.5 V and 400s for the probe immobilization on the electrode were suggested.
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Affiliation(s)
- M H Pournaghi-Azar
- Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
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