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Mirzaei B, Ebrahimi A, Hariri B, Sokouti Z, Kazemi N, Moradi N. Frequencies of mobilized colistin resistance (mcr-1, 2) genes in clinically isolated Escherichia coli; a cross sectional study. BMC Res Notes 2023; 16:192. [PMID: 37653554 PMCID: PMC10472595 DOI: 10.1186/s13104-023-06455-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/10/2023] [Indexed: 09/02/2023] Open
Abstract
OBJECTIVE Escherichia coli (E. coli) is an opportunistic bacterium, which is globally recognized for its high prevalence and antimicrobial resistance (AMR). The presence of colistin-resistant representative mcr- 1, 2 genes in multi-drug resistant (MDR) clinically isolated E. coli is the main goal of this survey. After biochemically and molecular confirmation tests, susceptibility testing, biofilm formation, and minimum inhibitory concentration to colistin were performed on 100 E. coli isolates. Subsequently, taking advantage of uniplex-PCR, the presence of some responsible genes (mcr- 1, mcr- 2) to colistin-resistant phenotypes in mentioned bacterium was assessed. RESULTS Disc diffusion methods indicated that the highest resistance rate was against ampicillin (80.0%), and trimethoprim/sulfamethoxazole (63%). Among the E. coli isolates, 72 (72.0%) was determined as MDR, respectively. Moreover, 47 (47%) strains were determined as extreme beta-lactamase (ESBL) phenotypes. Among 41 slime-producing E. coli strains, 7 (17.07%), 14 (34.14%), and 20 (48.78%) strains exhibited high, moderate, and weak levels of biofilm formation, respectively. Fifty-nine (81.94%), and 1(100%) of MDR isolates were assessed as colistin resistant (MIC > 2) and susceptible (MIC ≤ 2) as well. In 26(36.11%) of colistin-resistant isolates and 1(1.38%) of colistin, susceptible isolate mcr-1 gene was found. There is no mcr- 2 gene was detected in isolates. CONCLUSION The diversity of high antibiotic-resistant rates could be avoided by developing appropriate healthcare policies and community awareness. Alarming resistance rates were observed in colistin and ampicillin, which should be taken into account in therapy guidelines.
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Affiliation(s)
- Bahman Mirzaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Aida Ebrahimi
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Bahareh Hariri
- Student Research Committee, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Zahra Sokouti
- Student Research Committee, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Niloufar Kazemi
- Student Research Committee, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Narges Moradi
- Department of Life Technologies, University of Turku, Turku, Finland
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Mirzaei B, Ebrahimi A, Keshavarzi S, Hydarzadeh S, Badmasti F, Dadar M, Moradi N. Antibiotic Susceptibility, Biofilm-Forming Ability, and Prevalence of Extended-Spectrum Beta-Lactamase (ESBL)- and Biofilm-Associated Genes Among Klebsiella pneumoniae Isolates from Hospitalized Patients in Northwest of Iran. Curr Microbiol 2023; 80:175. [PMID: 37029837 DOI: 10.1007/s00284-023-03247-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 02/25/2023] [Indexed: 04/09/2023]
Abstract
Klebsiella pneumoniae is an opportunistic bacterium, which is globally recognized for its high prevalence and antimicrobial resistance (AMR). Biofilm-forming capability, susceptibility testing, and phenotypic confirmatory test for extended-spectrum beta-lactamase (ESBL)-producing isolate recognition of 104 K. pneumoniae isolates were performed according to the Clinical Laboratory Standard Institute (CLSI) guidelines. The prevalence of ESBL-associated genes bla-VIM, bla-NDM, and bla-OXA-48, as well as biofilm-associated genes luxS, fimH1, wza, and mrkD, was determined by multiplex PCR. The highest resistance rate was against ampicillin (100.0%). Among the 104 K. pneumoniae isolates, 52 (50.0%) and 31 (29.8%) isolates were determined as multi- and extensively drug resistant (MDR, XDR), respectively. Moreover, 21 (40.4%) isolates were determined as ESBL producing. Among 50 biofilm-producing K. pneumoniae isolates, 7 (14.0%), 15 (30.0%), and 28 (56.0%) isolates exhibited high, moderate, and weak levels of biofilm formation, respectively. A number of 41 (78.8%) isolates were susceptible to colistin, and 10 (19.2%) were resistant. AMR was significantly higher (P < 0.05) in the biofilm-forming isolates compared with non-biofilm formers.
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Affiliation(s)
- Bahman Mirzaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Aida Ebrahimi
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Shima Keshavarzi
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Siamak Hydarzadeh
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Farzad Badmasti
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | - Maryam Dadar
- Education and Extension Organization, Razi Vaccine and Serum Research Institute, Agricultural Research, Karaj, Iran
| | - Narges Moradi
- Department of Life Technologies, University of Turku, Turku, Finland
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Ahmadian L, Haghshenas MR, Mirzaei B, Khalili Y, Goli HR. Role of MexAB-OprM efflux pump in the emergence of multidrug-resistant clinical isolates of Pseudomonas aeruginosa in Mazandaran province of Iran. Mol Biol Rep 2023; 50:2603-2609. [PMID: 36626068 DOI: 10.1007/s11033-022-08230-2] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 12/22/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Multidrug-resistant clinical isolates can cause many therapeutic problems. The MexAB-OprM efflux pump plays a significant role in expelling toxins and drugs from the bacterial cells resulting in multidrug-resistant Pseudomonas aeruginosa isolates. PURPOSE This study aimed to investigate the effect of the MexAB-OprM efflux pump in the emergence of multidrug-resistant clinical isolates of P. aeruginosa. METHODS AND RESULTS For the present study, 100 clinical isolates of P. aeruginosa were collected from different wards of teaching hospitals (2018-2019). After confirmation and detection of bacteria by standard methods, the antibiotic resistance pattern of the isolates was determined by the disk agar diffusion method. Also, the minimum inhibitory concentration (MIC) of ciprofloxacin was measured in the presence and absence of phenylalanine arginine beta-naphthylamide by the broth microdilution method. Then, the real-time PCR was used to investigate the expression level of the mexB gene compared to the standard PAO1 strain. Forty-one/100 isolates exhibited multidrug-resistant phenotype (MDR), while piperacillin-tazobactam and levofloxacin were the most and least effective antibiotics tested, respectively. Also, 54/100 isolates showed no increased expression of mexB gene compared to the standard PAO1 strain. However, among the 41 MDR isolates, 12 (29.26%) showed a more than three-fold increase in the expression level of the mexB gene. In this study, a significant relationship was observed between the resistance to tested antibiotics in MDR strains and the increased expression of the mexB gene. CONCLUSION We found that increasing the expression of the mexB gene can cause the emergence of multidrug-resistant strains by increasing the minimum inhibitory concentration of the antibiotics. Then, we need to evaluate the resistance mechanisms separately in different area of a country to improve the antibiotic stewardship.
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Affiliation(s)
- Leila Ahmadian
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Farah Abad blv, Khazar square, Sari, Mazandaran, Iran
| | - Mohammad Reza Haghshenas
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Farah Abad blv, Khazar square, Sari, Mazandaran, Iran
| | - Bahman Mirzaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Younes Khalili
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamid Reza Goli
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran. .,Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Farah Abad blv, Khazar square, Sari, Mazandaran, Iran.
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Basir SS, Mirzaei B. Effects of moderate-intensity concurrent exercise training on cardiovascular risk factors in patients with chronic kidney disease undergoing hemodialysis: a randomized control trial. Sport Sci Health 2022. [DOI: 10.1007/s11332-022-00911-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Moradi N, Kazemi N, Ghaemi M, Mirzaei B. Frequency and antimicrobial resistance pattern of bacterial isolates from patients with COVID-19 in two hospitals of Zanjan. IJM 2021; 13:769-778. [PMID: 35222854 PMCID: PMC8816689 DOI: 10.18502/ijm.v13i6.8078] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Background and Objectives: The outbreak of COVID-19 has been challenging the global health systems. As one of the major associated concerns, microbial co-infections and antimicrobial resistance play critical roles in the prognosis of the disease. This study aims to evaluate co-infections in COVID-19 patients regarding drug resistance. Materials and Methods: A total number of 5530 Real Time PCR-confirmed COVID-19 cases, who were admitted to two major educational Hospitals in Zanjan, Iran, from February 2019 to February 2020 were included. Respiratory, blood and urine specimens were collected and cultured on selective media. Subsequently, isolates identification, disc diffusion susceptibility tests, and data analysis were carried out. Results: Bacterial and fungal co-infections were confirmed in 423 patients (8.1%). Co-infections were more prevalent among females (53.2%) than males (46.8%). Coinfected patients had a significantly higher mortality rate compared to those without co-infections (54.8% vs. 12.2%, P<0.001). Acinetobacter baumannii was the most prevalent bacteria isolated from respiratory tract (15.4%) and blood (2.1%). Escherichia coli (12.5%) was the most frequent bacteria in urine. Fungal co-infection was confirmed in 174 (3.36%) patients. Gram-negative bacteria were highly sensitive to colistin (97.85%) and widely resistant to cefixime (91.79%) and trimethoprim-sulfamethoxazole (89.64%). Gram-positive bacteria were considerably sensitive to vancomycin (68%) and nitrofurantoin (66%). Tetracycline and ampicillin were the least effective antibiotics for Gram-positive bacteria with respective resistance rates of 90.91% and 83.33%. Conclusion: Given the high incidence of bacterial co-infections in COVID-19 patients, it is important to develop rapid and efficient diagnostic, therapeutic and disinfection guidelines to control these infections in the hospitals.
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Affiliation(s)
- Narges Moradi
- Student Research Committee, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Niloufar Kazemi
- Student Research Committee, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Mehdi Ghaemi
- Department of Anestheiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Bahman Mirzaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
- Corresponding author: Bahman Mirzaei, Ph.D, Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran. Telefax: +98-024-33140345
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Mirzaei B, Babaei R, Zeighami H, Dadar M, Soltani A. Staphylococcus aureus Putative Vaccines Based on the Virulence Factors: A Mini-Review. Front Microbiol 2021; 12:704247. [PMID: 34539603 PMCID: PMC8447878 DOI: 10.3389/fmicb.2021.704247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 05/02/2021] [Accepted: 07/30/2021] [Indexed: 12/25/2022] Open
Abstract
Since the 1960s, the frequency of methicillin-resistant Staphylococcus aureus as a recurrent cause of nosocomial infections has increased. Since multidrug-resistant Staphylococcus has overcome antimicrobial treatment, the development of putative vaccines based on virulence factors could be a great help in controlling the infections caused by bacteria and are actively being pursued in healthcare settings. This mini-review provides an overview of the recent progress in vaccine development, immunogenicity, and therapeutic features of some S. aureus macromolecules as putative vaccine candidates and their implications against human S. aureus-related infections. Based on the reviewed experiments, multivalent vaccines could prevent the promotion of the diseases caused by this bacterium and enhance the prevention chance of S. aureus infections.
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Affiliation(s)
- Bahman Mirzaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Ryhaneh Babaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Habib Zeighami
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
| | - Ali Soltani
- Department of English Language, Zanjan University of Medical Sciences, Zanjan, Iran
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Barjaste A, Mirzaei B, Rahmani-nia F, Haghniyaz R, Brocherie F. Concomitant aerobic- and hypertrophy-related skeletal muscle cell signaling following blood flow-restricted walking. Sci Sports 2021. [DOI: 10.1016/j.scispo.2020.03.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sadeghi H, Khoei SG, Bakht M, Rostamani M, Rahimi S, Ghaemi M, Mirzaei B. A retrospective cross-sectional survey on nosocomial bacterial infections and their antimicrobial susceptibility patterns in hospitalized patients in northwest of Iran. BMC Res Notes 2021; 14:88. [PMID: 33750469 PMCID: PMC7941966 DOI: 10.1186/s13104-021-05503-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 02/26/2021] [Indexed: 11/19/2022] Open
Abstract
Objective Nosocomial infections (NIs) are known as one of the remarkable problems in all countries. This study is aimed to estimate the prevalence rate of nosocomial bacterial agents with antimicrobial susceptibility pattern in hospitalized patients. This study was conducted from April 2017 to September 2018, on 4029 hospitalized patients. We set out to recognize the commonest bacterial infections and antimicrobial susceptibility patterns of nosocomial infection. Results Of the 4029 patients, 509 (12.6%) of them were culture positive. Of these Escherichia coli (E. coli) (98.3%) and Staphylococcus epidermidis (S. epidermidis) (37.5%) were the most abundant bacterial identified in the urinary tract and bloodstream cultures respectively, Moreover, Acinetobacter spp. (100%) and Pseudomonas aeruginosa (22.2%) were the most abundant organisms detected in the respiratory system. According to susceptibility testing results, 370 (80.5%) and 264 (57.3%) in Gram-negatives and 44 (91.7%) and 35 (72.9%) in gram positives isolated strains were classified as multidrug-resistant (MDR) and extensive drug-resistant (XDR) strain respectively. On account of the high prevalence of MDR and XDR bacterial species, there is a pressing need for the expansion of new strategies on antibiotic supervision and infection control to introduce new guideline on empirical antibiotic therapy. Supplementary Information The online version contains supplementary material available at 10.1186/s13104-021-05503-0.
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Affiliation(s)
- Hamid Sadeghi
- Department of Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | | | - Mehdi Bakht
- Department of Microbiology, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Mohammad Rostamani
- Department of Microbiology, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Sara Rahimi
- Department of Microbiology, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Mehdi Ghaemi
- Department of Anesthesiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Bahman Mirzaei
- Department of Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran. .,Department of Microbiology and Virology, School of Medicine, Mazandaran University of Medical Sciences, Mazandaran, Iran.
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Shadkam S, Goli HR, Mirzaei B, Gholami M, Ahanjan M. Correlation between antimicrobial resistance and biofilm formation capability among Klebsiella pneumoniae strains isolated from hospitalized patients in Iran. Ann Clin Microbiol Antimicrob 2021; 20:13. [PMID: 33588850 PMCID: PMC7885248 DOI: 10.1186/s12941-021-00418-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/29/2021] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Klebsiella pneumoniae is a common cause of nosocomial infections. Antibiotic resistance and ability to form biofilm, as two key virulence factors of K. pneumoniae, are involved in the persistence of infections. The purpose of this study was to investigate the correlation between antimicrobial resistance and biofilm formation capability among K. pneumoniae strains isolated from hospitalized patients in Iran. METHODS Over a 10-month period, a total of 100 non-duplicate K. pneumoniae strains were collected. Antibiotic susceptibility was determined by Kirby-Bauer disk diffusion method according to CLSI. Biofilm production was assessed by tissue culture plate method. Finally, polymerase chain reaction was conducted to detect four families of carbapenemase: blaIMP, blaVIM, blaNDM, blaOXA-48; biofilm formation associated genes: treC, wza, luxS; and K. pneumoniae confirming gene: rpoB. RESULTS Most of the isolates were resistant to trimethoprim-sulfamethoxazole (52 %), cefotaxime (51 %), cefepime (43 %), and ceftriaxone (43 %). Among all the 100 isolates, 67 were multidrug-resistant (MDR), and 11 were extensively drug-resistant (XDR). The prevalence of the blaVIM, blaIMP, blaNDM, and blaOXA-48 genes were 7 , 11 , 5 , and 28 %, respectively. The results of biofilm formation in the tissue culture plate assay indicated that 75 (75 %) strains could produce biofilm and only 25 (25 %) isolates were not able to form biofilm. Among these isolates, 25 % formed fully established biofilms, 19 % were categorized as moderately biofilm-producing, 31 % formed weak biofilms, and 25 % were non-biofilm-producers. The antimicrobial resistance among biofilm former strains was found to be significantly higher than that of non-biofilm former strains (p < 0.05). Molecular distribution of biofilm formation genes revealed that 98 , 96 , and 34 % of the isolates carried luxS, treC, and wza genes, respectively. CONCLUSIONS The rise of antibiotic resistance among biofilm-producer strains demonstrates a serious concern about limited treatment options in the hospital settings. All of the data suggest that fundamental actions and introduction of novel strategies for controlling of K. pneumoniae biofilm-related infections is essential.
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Affiliation(s)
- Shadi Shadkam
- Department of Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hamid Reza Goli
- Department of Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Bahman Mirzaei
- Department of Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mehrdad Gholami
- Department of Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mohammad Ahanjan
- Department of Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
- Antimicrobial Resistance Research Center, Mazandaran University of Medical Sciences, Sari, Iran.
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Jouybari MA, Ahanjan M, Mirzaei B, Goli HR. Role of aminoglycoside-modifying enzymes and 16S rRNA methylase (ArmA) in resistance of Acinetobacter baumannii clinical isolates against aminoglycosides. Rev Soc Bras Med Trop 2021; 54:e05992020. [PMID: 33533819 PMCID: PMC7849326 DOI: 10.1590/0037-8682-0599-2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/12/2020] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION: This study aimed to determine the role of genes encoding aminoglycoside-modifying enzymes (AMEs) and 16S rRNA methylase (ArmA) in Acinetobacter baumannii clinical isolates. METHODS: We collected 100 clinical isolates of A. baumannii and identified and confirmed them using microbiological tests and assessment of the OXA-51 gene. Antibiotic susceptibility testing was carried out using disk agar diffusion and micro-broth dilution methods. The presence of AME genes and ArmA was detected by PCR and multiplex PCR. RESULTS: The most and least effective antibiotics in this study were netilmicin and ciprofloxacin with 68% and 100% resistance rates, respectively. According to the minimum inhibitory concentration test, 94% of the isolates were resistant to gentamicin, tobramycin, and streptomycin, while the highest susceptibility (20%) was observed against netilmicin. The proportion of strains harboring the aminoglycoside resistance genes was as follows: APH(3′)-VIa (aphA6) (77%), ANT(2”)-Ia (aadB) (73%), ANT(3”)-Ia (aadA1) (33%), AAC(6′)-Ib (aacA4) (33%), ArmA (22%), and AAC(3)-IIa (aacC2) (19%). Among the 22 gene profiles detected in this study, the most prevalent profiles included APH(3′)-VIa + ANT(2”)-Ia (39 isolates, 100% of which were kanamycin-resistant), and AAC(3)-IIa + AAC(6′)-Ib + ANT(3”)-Ia + APH(3′)-VIa + ANT(2”)-Ia (14 isolates, all of which were resistant to gentamicin, kanamycin, and streptomycin). CONCLUSIONS: High minimum inhibitory concentration of aminoglycosides in isolates with the simultaneous presence of AME- and ArmA-encoding genes indicated the importance of these genes in resistance to aminoglycosides. However, control of their spread could be effective in the treatment of infections caused by A. baumannii.
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Affiliation(s)
- Maryam Asadi Jouybari
- Mazandaran University of Medical Sciences, Faculty of Medicine, Molecular and Cell Biology Research Centre, Sari, Iran.,Mazandaran University of Medical Sciences, Faculty of Medicine, Department of Medical Microbiology and Virology, Sari, Iran
| | - Mohammad Ahanjan
- Mazandaran University of Medical Sciences, Faculty of Medicine, Molecular and Cell Biology Research Centre, Sari, Iran.,Mazandaran University of Medical Sciences, Faculty of Medicine, Department of Medical Microbiology and Virology, Sari, Iran
| | - Bahman Mirzaei
- Zanjan University of Medical Sciences, School of Medicine, Department of Medical Microbiology and Virology, Zanjan, Iran
| | - Hamid Reza Goli
- Mazandaran University of Medical Sciences, Faculty of Medicine, Molecular and Cell Biology Research Centre, Sari, Iran.,Mazandaran University of Medical Sciences, Faculty of Medicine, Department of Medical Microbiology and Virology, Sari, Iran
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Abstract
The number and frequency of multidrug-resistant (MDR) strains as a frequent cause of nosocomial infections have increased, especially for Methicillin-resistant Staphylococcus aureus and Staphylococcus epidermidis, in part due to device-related infections. The transition to antibiotic-resistance in related bacterial genes and the capability for immune escape have increased the sustainability of biofilms produced by these bacteria. The formation and changes in biofilms have been suggested as a target to prevent or treat staphylococcal infections. Thus, this study reviews the development of candidate staphylococcal vaccines by database searching, and evaluates the immunogenicity and efficacy profiles of bacterial components involved in biofilms. The literature suggests that using common staphylococcal vaccine antigens and multivalent vaccines should further enhance vaccine efficacy.
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Affiliation(s)
- Bahman Mirzaei
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences , Sari, Iran.,Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science , Zanjan, Iran
| | - Ryhaneh Babaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science , Zanjan, Iran
| | - Sina Valinejad
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science , Zanjan, Iran
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Ahmadian L, Haghshenas MR, Mirzaei B, Norouzi Bazgir Z, Goli HR. Distribution and Molecular Characterization of Resistance Gene Cassettes Containing Class 1 Integrons in Multi-Drug Resistant (MDR) Clinical Isolates of Pseudomonas aeruginosa. Infect Drug Resist 2020; 13:2773-2781. [PMID: 32848427 PMCID: PMC7429104 DOI: 10.2147/idr.s263759] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 05/26/2020] [Accepted: 07/16/2020] [Indexed: 12/25/2022] Open
Abstract
Purpose The integrons, as the mobile exogenous elements, play a prominent role in the spreading of antimicrobial resistance genes from Pseudomonas aeruginosa clinical isolates to other bacteria. This study aimed to investigate the frequency of class 1 integrons andresistance gene cassettes carrying by them in clinical isolates as well as multidrug resistant P. aeruginosa. Materials and Methods A total of 100 clinical isolates of P. aeruginosa were collected from 5 hospitals in Mazandaran province, north Iran. The antibiotic susceptibility pattern of the isolates was evaluated using the disk agar diffusion method. Genomic DNAs were extracted and then the presence of class 1 integrons was detected by the PCR test. All PCR products of the positive isolates were sequenced for the detection of resistance gene cassettes by the Sanger method. Results Forty-one percent of the clinical isolates were multi-drug resistant. Also, 42% of the isolates were contained class 1 integron, and 61.9% of the integron positive isolates were detected as MDR. We detected 10 different gene cassettes sizing from 0.6 to 3.5 kb in the present study. The sequencing analysis of the internal variable regions of the class 1 integrons showed that the 0.75 kb gene cassette (aadB) was the most frequent resistance gene (54.76%) among all clinical isolates, as well as the MDR isolates. Other resistance genes detected in this study were included: aadA6-orfD (35.71%), aacA4-bla OXA-10 (21.42%), aadB-aacA4-bla OXA-10 (19.04%), bla OXA-10-aacA4-VIM1 (11.9%), aacA4-catB10 (7.14%), aacA5-aadA1-cmlA5 (7.14%), bla OXA31-aadA2 (4.76%), and aac(3)-Ic-aacA5-cmlA5 (4.76%). To the best of our knowledge, bla OXA-10 -aacA4-VIM1 cassette array is detected for the first time in this study. Conclusion The treatment of infections caused by P. aeruginosa in this region of Iran is a major problem due to the high prevalence of class 1 integrons. It seems that the high prescription of beta-lactams and aminoglycosides for the treatment of these infections may be replaced by other combination therapy stewardships.
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Affiliation(s)
- Leila Ahmadian
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mohammad Reza Haghshenas
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Bahman Mirzaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Zahra Norouzi Bazgir
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hamid Reza Goli
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
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Mirzaei B, Bazgir ZN, Goli HR, Iranpour F, Mohammadi F, Babaei R. Prevalence of multi-drug resistant (MDR) and extensively drug-resistant (XDR) phenotypes of Pseudomonas aeruginosa and Acinetobacter baumannii isolated in clinical samples from Northeast of Iran. BMC Res Notes 2020; 13:380. [PMID: 32778154 PMCID: PMC7418330 DOI: 10.1186/s13104-020-05224-w] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 08/04/2020] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE Multi and extensively drug-resistant (MDR and XDR), Pseudomonas aeruginosa (P. aeruginosa) and Acinetobacter baumannii (A. baumannii) are two main causative agents of nosocomial infections leading to increased morbidity and mortality. We aim to study the prevalence of MDR and XDR-A. baumannii and P. aeruginosa phenotypes in clinical specimens. We conducted this for 1 year (2017-2018) and isolated bacteria from the clinical samples. Then, XDR and MDR strains were determined by susceptibility testing (disc diffusion). RESULTS Out of 3248 clinical samples, A. baumannii and P. aeruginosa strains were detected in 309(9.51%) of them. Susceptibility testing indicated that (16.50%) and (15.53%) of the P. aeruginosa and (74.75%) and (73.13%) of the A. baumannii isolates were screened as the MDR and XDR strains. The frequency of MDR isolates was higher in wound samples 222 (71.8%). This rate in behavioral intensive care unit (BICU) and restoration ward, were 187 (60.5%) and 63 (20.4%). The frequency of XDR isolates in BICU 187 (59.54%), restoration 58(18.77%), and burns 30 (9.70%) were assessed as well. Considering high isolation rates of MDR and XDR of mentioned strains, it is necessary to apply prevention criteria for eradication of the mentioned bacteria from hospital wards.
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Affiliation(s)
- Bahman Mirzaei
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Sari, Iran. .,Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science, Zanjan, Iran.
| | - Zahra Norouzi Bazgir
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Sari, Iran.,Student Research Committee, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hamid Reza Goli
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Sari, Iran
| | - Fatemeh Iranpour
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science, Zanjan, Iran
| | - Fatemeh Mohammadi
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science, Zanjan, Iran
| | - Ryhaneh Babaei
- Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science, Zanjan, Iran
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Norouzi Bazgir Z, Mirzaei B, Haghshenas MR, Goli HR, Shafaie E. Multi-drug Resistant Citrobacter freundii Isolates in a Burn Hospital in Northeast of Iran: A Single-Center Cross-sectional Study. Res Mol Med 2020. [DOI: 10.32598/rmm.8.2.893.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Multi-drug resistant (MDR) Citrobacter freundii (C. freundii) as a causative agent of nosocomial infections is a health threat, especially in hospitals. This study was conducted to determine the prevalence of MDR C. freundii, considering isolation sites and a variety of utilized antibiotics. Materials and Methods: In this cross-sectional study, the clinical samples of C. freundii strains were collected and screened using traditional bacteriological tests in Zareh Hospital, Sari City, Iran, during 2016-2017. We used disk diffusion methods to assess the susceptibility patterns of isolates according to the Clinical Laboratory Standard Institute (CLSI) guidelines. Results: Out of 3248 clinical samples, C. freundii strains were detected in 109 samples (32.1% females and 67.9% males). Susceptibility tests indicated that 89 isolates (81.65%) were MDR strains. Frequencies of MDR C. freundii strains were higher in the Behavioral Intensive Care Unit (BICU) (37.61%) and restoration ward (29.35%) compared with other hospital wards. Conclusion: Considering the MDR C. freundii strains detected from burn hospital wards, it is necessary to implement prevention criteria for their eradication from burn hospitals. The results indicate the urgent need to design more practical methods for controlling infection in hospital wards.
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Aryashakib A, Mirzaei B, Saidie P. Effect of Aerobic Exercise With Blood Flow Restriction on Mitochondrial Dynamics Proteins of Human Skeletal Muscles. JQUMS 2020. [DOI: 10.32598/jqums.24.1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Aerobic exercise with Blood Flow Restriction (BFR) plays an important role in skeletal muscle adaptation; however, the effects of this type of exercise on mitochondrial dynamics proteins are unclear. Objective The purpose of this study was to investigate the effect of aerobic exercise with and without BFR on mitochondrial dynamics proteins of human skeletal muscles. Methods: Participants were 5 young men (mean age, 33.4±2.30 years; mean weight, 79.64±10.49 kg; BMI, 26.24±2.27 kg/m2). They performed aerobic exercise with BFR (AE+BFR) and without BFR (AE) in two separate days at five 2-min sessions and 1 min rest between the sessions. Western Blot method was used to measure the protein levels of Mitofusin 2 (MFN2) and Dynamin-Related Protein 1 (DRP1) in skeletal muscles. Findings: AE+BFR (1.02±0.05 vs. 0.77±0.03) and AE (0.65±0.08 vs 0.57±0.03) significantly increased the mean MFN2 protein level compared to the pre-test mean values (P<0.05). AE+BFR (3.54±0.46 and 5.01±0.66) and AE (3.38±0.38 vs. 2.82±0.59) also significantly reduced the mean DRP1 level (P<0.05). Moreover, AE+BFR had greater significant effect on the mean levels of MFN2 (0.24±0.01 vs. 0.08±0.04) and DRP1 (-1.46±0.22 vs. -0.33±0.12) compared to AE (P<0.05). Conclusion: It seems that aerobic exercise with BFR is a strong stimulant for the improvement of skeletal muscle mitochondrial dynamics.
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Mirzaei B, Faridifar P, Shahmoradi M, Shapouri R, Iranpour F, Haghi F, Ezzedin M, Babaei R, Mousavi SF. Genotypic and phenotypic analysis of biofilm formation Staphylococcus epidermidis isolates from clinical specimens. BMC Res Notes 2020; 13:114. [PMID: 32103775 PMCID: PMC7045379 DOI: 10.1186/s13104-020-04965-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/04/2019] [Accepted: 02/19/2020] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES Staphylococcus epidermidis is the primary causative agent of infections associated with indwelling biomaterials. Antibiotic susceptibility patterns, Biofilm formation capability, and screening of responsible genes in biofilm formation procedure in clinical isolates (icaA, icaB, icaC, icaD, sdrG, and atlE) were assigned as the main objectives in this study. The clinical samples were analyzed via standard biochemical assays for identifying different bacteria which were confirmed using the multiplex colony PCR method. Subsequently, biofilm-formation capability, antibiotic susceptibility testing, and the frequency of genes responsible for biofilm formation in the confirmed strains were checked. RESULTS Out of 183 clinical specimens 54 S. epidermidis isolates were detected by targeting a housekeeping gene (sesc) taking advantage of the PCR procedure. All of the strains were Biofilm forming producers. The in vitro biofilm formation assays determined that 45 (83.33%), 5 (9.26%), 4 (7.41%) were strong, moderate, and weak biofilm former strains respectively. Among the isolated strains, the specific frequencies of the biofilm-forming genes were specified to be (98%) for sdrG, (84%) for atlE, (80%) for icaC, and (70%) for icaD. Cefamandole and Amikacin are the most effective antibiotics in isolated strains. All strains were ascertained to be methicillin and amoxicillin/clavulanic acid resistant.
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Affiliation(s)
- Bahman Mirzaei
- Department of Microbiology and Virology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran.,Department of Microbiology and Virology, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Peyman Faridifar
- Department of Microbiology, Islamic Azad University, Zanjan Branch, Zanjan, Iran.,Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mostafa Shahmoradi
- Department of Microbiology, Islamic Azad University, Zanjan Branch, Zanjan, Iran.,Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Reza Shapouri
- Department of Microbiology, Islamic Azad University, Zanjan Branch, Zanjan, Iran
| | - Fatemeh Iranpour
- Department of Microbiology and Virology, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Fakhri Haghi
- Department of Microbiology and Virology, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Mahnaz Ezzedin
- Department of Microbiology, Islamic Azad University, Tehran Branch, Tehran, Iran
| | - Reyhaneh Babaei
- Department of Microbiology and Virology, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran.,Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Seyed Fazlollah Mousavi
- Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran.
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Mirzaei B, Haghshenas MR, Goli H, Babaei R. Putative Targets as Vaccine Candidates with Respect to Biofilm Formation Procedure in Staphylococci. vacres 2019. [DOI: 10.29252/vacres.6.2.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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18
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Golpasandi H, Mirzaei B, Golpasandi S. Glucose, Insulin and Growth/Differentiation Factor-15 Serums Responses to the Acute Effects of Two Intermittent and Continuous Exercises in Sedentary Obese Males. J Qazvin Univ Med Sci 2019. [DOI: 10.32598/jqums.23.4.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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19
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Gholami SA, Goli HR, Haghshenas MR, Mirzaei B. Evaluation of polysaccharide intercellular adhesion (PIA) and glycerol teichoic acid (Gly-TA) arisen antibodies to prevention of biofilm formation in Staphylococcus aureus and Staphylococcus epidermidis strains. BMC Res Notes 2019; 12:691. [PMID: 31653277 PMCID: PMC6815028 DOI: 10.1186/s13104-019-4736-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 09/05/2019] [Accepted: 10/15/2019] [Indexed: 02/21/2023] Open
Abstract
Objective Staphylococcus aureus and S. epidermidis as opportunistic pathogens, notable for their frequency and severity of infections are recognized as the most usual reasons for medical device-associated infections that strike hospitalized patients and also immunocompromised individuals. In this study, the polysaccharide intercellular adhesion (PIA) and Glycerol teichoic acid) Gly-TA) as two major macromolecules in the biofilm formation process were purified under the native condition and their structure was analyzed by using colorimetric assays and Fourier Transform Infrared spectroscopy (FTIR). Afterward, the immune response of macromolecules and the mixture of them were assessed by measuring total IgG titers. Subsequently, biofilm inhibitory effects of raising antibodies to biofilm former S. aureus and S. epidermidis were evaluated. Results Obtained data were shown a significant rise in levels of antibodies in immunized mice with mentioned antibodies in comparison with the control group. According to the obtained findings, mentioned antibodies could eliminate S. aureus and S. epidermidis biofilm formation in vitro assays. This survey confirms the proposal that immunization of mice with a mixture of Gly-TA and PIA vaccine could be secure and protected against S. epidermidis and S. aureus infection.
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Affiliation(s)
- Sanaz Amir Gholami
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Sari, Iran
| | - Hamid Reza Goli
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Sari, Iran
| | - Mohammad Reza Haghshenas
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Sari, Iran
| | - Bahman Mirzaei
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Sari, Iran. .,Department of Medical Microbiology and Virology, School of Medicine, Zanjan University of Medical Science, Zanjan, Iran.
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Daneshyar Z, Goli HR, Mirzaei B, Rabie M, Haghshenas MR. Prevalence and clinical symptoms of Human Parainfluenza and Influenza infections in patients admitted to Mazandaran province health centers, 2019. Res Mol Med 2019. [DOI: 10.32598/rmm.7.3.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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21
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Shooraj F, Mirzaei B, Mousavi SF, Hosseini F. Clonal diversity of Haemophilus influenzae carriage isolated from under the age of 6 years children. BMC Res Notes 2019; 12:565. [PMID: 31506105 PMCID: PMC6737650 DOI: 10.1186/s13104-019-4603-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 08/10/2019] [Accepted: 09/03/2019] [Indexed: 01/01/2023] Open
Abstract
Objectives Pharyngeal carriers such as H. influenzae seem to constitute the only reservoir and probably the only transmission vehicle of the invasive disease. The aims of this study were to estimate the prevalence of H. influenzae carriage, to characterize antibiotic susceptibility, and to explore genetic diversity of H. influenzae isolates. Sampling was carried out as nasopharynx swabs among children less than 6 years old volunteers. After traditional biochemical tests, isolates were confirmed by targeting omp6 sequence. Following the susceptibility tests, genomic diversity of strains was analyzed by Pulsed-Field Gel Electrophoresis procedure. Results Out of 328 nasopharynx swabs, 73 strains were identified as H. influenzae. Among H. influenzae isolates, resistance to chloramphenicol (42%) and ampicillin (43%) was observed. Levofloxacin is the most effective antibiotic and the least effect belonged to tetracycline. By genomic analysis of selected H. influenza, 28 PFGE patterns were achieved among which 11 patterns included at least 2 strains. All strains clustered into 25 different clones. The dendrogram analysis of the isolated H. influenzae strains showed that some of these strains had a clonal relationship and common genetic origin. According to our results, antibiotic resistance didn’t show any significant correlation with the clonality of strains.
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Affiliation(s)
- Fahimeh Shooraj
- Department of Microbiology, Pasteur Institute of Iran, Tehran, Iran.,Department of Microbiology, Faculty of Biology, Islamic Azad University, North Branch, Tehran, Iran
| | - Bahman Mirzaei
- Department of Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | | | - Farzaneh Hosseini
- Department of Microbiology, Faculty of Biology, Islamic Azad University, North Branch, Tehran, Iran
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22
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Haghi F, Goli E, Mirzaei B, Zeighami H. The association between fecal enterotoxigenic B. fragilis with colorectal cancer. BMC Cancer 2019; 19:879. [PMID: 31488085 PMCID: PMC6727388 DOI: 10.1186/s12885-019-6115-1] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/30/2019] [Indexed: 02/06/2023] Open
Abstract
Background Enterotoxigenic Bacteroides fragilis (ETBF) is an enterotoxin-producing bacterium that possibily has a role in the occurrence and progression of colorectal cancer (CRC) by modulating the mucosal immune response and inducing epithelial cell changes. The aim of this study was to investigate the frequency of ETBF in stool samples of CRC patients and healthy volunteers. Methods A total of 60 stool samples from confirmed CRC patients and 60 stool samples from healthy volunteers with no personal or familial history or diagnosis of colorectal disease were collected. Stool samples were screened for direct detection of B. fragilis using PCR targeting the marker genes of neu and bft. Enterotoxin isotypes bft-1, bft-2 and bft-3 were also detected in B. fragilis positive samples. Results The frequency of B. fragilis among CRC and control cases was 58.3 and 26.6%, respectively (P < 0.05). The rate of bft gene in CRC cases was significantly higher than in controls (P < 0.05). Also, the presence of bft gene in CRC patients stage III was significantly higher than stages I and II (P < 0.05). Enterotoxin isotype bft-2 was detected with higher frequency among CRC patients than healthy control (P < 0.05). Conclusion Our results show the association between fecal ETBF and CRC, and we suggest that detection of ETBF may be a potential marker for colorectal cancer diagnosis. However, additional investigations on tumor and paired normal tissue samples are required to substantiate this possible correlation.
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Affiliation(s)
- Fakhri Haghi
- Department of Microbiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Elshan Goli
- Department of Microbiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Bahman Mirzaei
- Department of Microbiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Habib Zeighami
- Department of Microbiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran.
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Bahonar S, Ghazvinian M, Haghshenas MR, Goli HR, Mirzaei B. Purification of PIA and rSesC as Putative Vaccine Candidates Against Staphylococcus aureus. Rep Biochem Mol Biol 2019; 8:161-167. [PMID: 31832440 PMCID: PMC6844615] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 09/10/2018] [Indexed: 06/10/2023]
Abstract
BACKGROUND Staphylococcus aureus is predominant at sites of biomaterial-associated infection (BAI) and frequently infects hospitalized individuals. METHODS The polysaccharide intercellular adhesin (PIA) and S. epidermidis rSesC protein, major macromolecules in biofilm formation, were purified under native conditions and cloned and expressed in a prokaryotic host. RESULTS LPurification of the macromolecules was confirmed by FTIR and Western blotting. CONCLUSION The S. epidermidis SesC protein and PIA were uccessfully purified. Both are considered as vaccine candidates.
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Affiliation(s)
- Sara Bahonar
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science.
- Molecular and cell biology Research center, Faculty of Medicine, Mazandaran University of Medical sciences, Sari, Iran.
| | - Maryam Ghazvinian
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science.
| | - Mohamad Reza Haghshenas
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science.
| | - Hamid Reza Goli
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science.
| | - Bahman Mirzaei
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science.
- Molecular and cell biology Research center, Faculty of Medicine, Mazandaran University of Medical sciences, Sari, Iran.
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Mirzaei B, Mousavi SF, Babaei R, Bahonar S, Siadat SD, Shafiee Ardestani M, Shahrooei M, Van Eldere J. Synthesis of conjugated PIA–rSesC and immunological evaluation against biofilm-forming Staphylococcus epidermidis. J Med Microbiol 2019; 68:791-802. [DOI: 10.1099/jmm.0.000910] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- Bahman Mirzaei
- Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Iran
| | - Seyed Fazlollah Mousavi
- Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Reyhane Babaei
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Iran
| | - Sara Bahonar
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Iran
| | - Seyed Davar Siadat
- Mycobacteriology and Pulmonary Research Department, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mehdi Shafiee Ardestani
- Department of Radio-pharmacy, Faculty of Pharmacy, Tehran University of Medical Science, Tehran, Iran
| | - Mohammad Shahrooei
- Laboratory of Medical Microbiology, Department of Medical Diagnostic Sciences, KU Leuven, UZ Gasthuisberg, Herestraat 49 CDG 8th floor, B-3000 Leuven, Belgium
| | - John Van Eldere
- Laboratory of Medical Microbiology, Department of Medical Diagnostic Sciences, KU Leuven, UZ Gasthuisberg, Herestraat 49 CDG 8th floor, B-3000 Leuven, Belgium
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Shahmoradi M, Faridifar P, Shapouri R, Mousavi SF, Ezzedin M, Mirzaei B. Determining the Biofilm Forming Gene Profile of Staphylococcus aureus Clinical Isolates via Multiplex Colony PCR Method. Rep Biochem Mol Biol 2019; 7:181-188. [PMID: 30805398 PMCID: PMC6374067] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 01/06/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Among hospitalized patients, Staphylococcus aureus (S. aureus) infections pose a serious health threat. The present study investigated the frequency of biofilm forming genes among clinical isolates S. aureus and their susceptibility to antibiotics. METHODS The clinical samples were analyzed via standard biochemical assays for identifying different bacterium, which was then confirmed using the multiplex colony PCR method. Those samples identified as S. aureus were examined for the presence of the cna, fnbA, fnbB and pvl genes. The antibiotic susceptibility of the S. aureus isolates was then tested. RESULTS Using the standard biochemical assay approach, 54 S. aureus strains were identified. However, when using the multiplex PCR method 50 S. aureus strains were identified among the clinical samples. The in vitro biofilm formation assays determined 3 (6%) strains of S. aureus to be strong biofilm forming, 15 (30%) of the isolates were determined to be moderate biofilm forming and, 32 (64%) were determined to be weak biofilm forming. Among the isolated strains, the specific frequencies of the biofilm forming genes were determined to be 31 (62%) for cna, 35 (70%) for fnbA, 13 (26%) for fnbB and 1 (2%) for pvl. In 11 (22%) of the isolated strains fnbA, fnbB and cna genes were all present. All strains were determined to be penicillin, amoxicillin and clavulanic acid resistant. CONCLUSION Due to the increase of the antibiotic resistance in biofilm producing S. aureus strains, rapid identification of antibiotic resistance can help to eliminate the infection effectively.
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Affiliation(s)
- Mostafa Shahmoradi
- Department of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, Iran.
| | - Peyman Faridifar
- Department of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, Iran.
| | - Reza Shapouri
- Department of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, Iran.
| | | | - Mahnaz Ezzedin
- Department of Microbiology, Islamic Azad University, Tehran branch, Tehran, Iran
| | - Bahman Mirzaei
- Department of Microbiology, Islamic Azad University, Tehran branch, Tehran, Iran
- Department of Medical Microbiology and Virology Faculty of Medicine, Mazandaran University of medical sciences, Sari, Iran.
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Mirzaei B, Etemadian S, Goli HR, Bahonar S, Gholami SA, Karami P, Farhadi M, Tavakoli R. Construction and analysis of alginate-based honey hydrogel as an ointment to heal of rat burn wound related infections. Int J Burns Trauma 2018; 8:88-97. [PMID: 30245913 PMCID: PMC6146165] [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] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 08/12/2018] [Indexed: 06/08/2023]
Abstract
Developing a strategy for making the alginate base hydrogel components against burned wound infections could be promising for healing the mentioned wounds followed by elimination of the biofilm forming bacteria colonization. Construction of an alginate based hydrogel and evaluating healing activities of the mentioned component as local ointment were the main objectives of the current study. Following the collection of the honey from three different provinces of Iran, the components and structures of the collected materials were analyzed taking advantage of INSO-92 procedure subsequently, antibacterial effect of diluted three different kinds of honey against wild-type bacterial species got evaluated via agar well diffusion method. An alginate base hydrogel was prepared by the use of calcium chloride as a linker between the alginate and honey functional groups. Then, component was structurally analyzed by Fourier Transform Infrared spectroscopy (FTIR). Afterward, under in vivo conditions, the healing activities of prepared ointment were studied in infected burned rat models. According to the antibacterial effect of the honeys, 75% diluted thymol based honeys collected from Damavand province were the most efficient ones. Furthermore, it was the healing activity of mentioned ointment was proven in vivo studies. The difference between 1600-1800 wave numbers in constructed alginate-based hydrogel alginate and honey because of C = O bond variations structurally confirmed proper construction of hydrogel. The hydrogel was the better healing activity in rats burned wound too. In conclusion the promising efficiency of alginate-based hydrogel in an elimination of bacterial infections was confirmed as the main aim of the current survey.
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Affiliation(s)
- Bahman Mirzaei
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical SciencesSari, Iran
- The Health of Plant and Livestock Products Research Center, Mazandaran University of Medical SciencesSari, Iran
| | - Somayeh Etemadian
- Department of Medical Engineering, Faculty of Engineering Maziar UniversityNoor, Iran
| | - Hamid Reza Goli
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical SciencesSari, Iran
| | - Sara Bahonar
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical SciencesSari, Iran
| | - Sanaz Amir Gholami
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical SciencesSari, Iran
| | - Parisima Karami
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical SciencesSari, Iran
| | - Mojgan Farhadi
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical SciencesSari, Iran
| | - Rahmatollah Tavakoli
- Department of Medical Engineering, Faculty of Engineering Maziar UniversityNoor, Iran
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Mirzaei B, Silva JRG, Hayton D, Groppi C, Kao TY, Hu Q, Reno JL, Gao JR. 8-beam local oscillator array at 4.7 THz generated by a phase grating and a quantum cascade laser. Opt Express 2017; 25:29587-29596. [PMID: 29220996 DOI: 10.1364/oe.25.029587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 10/16/2017] [Indexed: 06/07/2023]
Abstract
We present an 8-beam local oscillator (LO) for the astronomically significant [OI] line at 4.7 THz. The beams are generated using a quantum cascade laser (QCL) in combination with a Fourier phase grating. The grating is fully characterized using a third order distributed feedback (DFB) QCL with a single mode emission at 4.7 THz as the input. The measured diffraction efficiency of 74.3% is in an excellent agreement with the calculated result of 75.4% using a 3D simulation. We show that the power distribution among the diffracted beams is uniform enough for pumping an array receiver. To validate the grating bandwidth, we apply a far-infrared (FIR) gas laser emission at 5.3 THz as the input and find a very similar performance in terms of efficiency, power distribution, and spatial configuration of the diffracted beams. Both results represent the highest operating frequencies of THz phase gratings reported in the literature. By injecting one of the eight diffracted 4.7 THz beams into a superconducting hot electron bolometer (HEB) mixer, we find that the coupled power, taking the optical loss into account, is in consistency with the QCL power value.
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Mousavi SF, Mirzaei B, Shaghaghi B, Jalali P, Setayesh T, Moosavi SH. Phenotypic and genotypic features of first biofilm forming nasopharyngeal colonized Streptococcus pneumoniae isolates. Iran J Microbiol 2017; 9:200-207. [PMID: 29238454 PMCID: PMC5723971] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVES Designing control and therapeutic policies for antibiotic resistant Streptococcus pneumoniae, which is an important causative agent of several invasive and noninvasive infectious diseases and its carriage rates, has been described as the main target in World Health Organization (WHO). The present study was conducted to determine antibiotic resistance pattern, evaluate biofilm forming ability in S. pneumoniae isolates, and find the genetic relationship between cultured strains. MATERIALS AND METHODS Following the isolation and identification of S. pneumoniae strains from nasopharyngeal swabs, the ability of biofilm formation and susceptibility pattern of the isolates were screened using semi-quantitative microplate and disk diffusion procedures. Subsequently, Pulse field gel electrophoresis (PFGE) method was used to determine the clonal diversity of isolates. RESULTS The pneumococcal colonization rate in this study was found to be 24%. A large number of our isolates had strong biofilm forming ability. However, there was variation in antibiotic resistance patterns of isolates in children who lived in nursery houses. The genetic similarity among the isolates in PFGE varied from 26.5% to 100% in our isolates. This was the first report of biofilm formation of nasopharyngeal colonized S. pneumoniae in Iran. Genetic variations were also noticeable, when the isolates were fingerprinted by PFGE. CONCLUSION The findings of this study revealed the need for thoughtful use of antimicrobial agents, continued monitoring of pneumococcal resistance patterns, and prevention of the spread of multi-drug resistant clones.
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Affiliation(s)
- Seyed Fazlollah Mousavi
- Corresponding author: Seyed Fazlollah Mousavi, Ph.D, Department of Bacteriology & Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran. Tel: +98-21-66405535,
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Mirzaei B, Silva JRG, Luo YC, Liu XX, Wei L, Hayton DJ, Gao JR, Groppi C. Efficiency of multi-beam Fourier phase gratings at 1.4 THz. Opt Express 2017; 25:6581-6588. [PMID: 28381005 DOI: 10.1364/oe.25.006581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We compare the results of simulated and measured power efficiency and far-field beam pattern, for two reflective Fourier phase gratings, designed to generate 2 × 2 and 2 × 4 beams respectively from a single-beam, coherent source at 1.4 THz. The designed surface structures were manufactured on aluminum plates by a computer numerical control (CNC) micro-milling machine. Despite small differences between the designed and fabricated gratings, we measured power efficiencies of both gratings to be around 70%, which is in a good agreement with the simulated values. We also find a good agreement between the simulated and measured diffracted beam size and spatial distribution. We demonstrate the application of both gratings as multiple beam local oscillators to simultaneously pump (or operate) a 4-pixel array of superconducting heterodyne mixers.
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Torkashvand S, Damavandi Z, Mirzaei B, Tavallaei M, Vasei M, Mowla SJ. Decreased Expression of Bioinformatically Predicted piwil2-targetting microRNAs, miR-1267 and miR-2276 in Breast Cancer. Arch Iran Med 2017; 19:420-5. [PMID: 27293058 DOI: 0161906/aim.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
PURPOSE Human Piwil2, a member of Piwi subfamily of Argonaute proteins, is primarily expressed in testis, where it regulates self-renewal of germ cells. However, its ectopic expression has been reported with several tumors, including breast cancer. The upregulation of piwil2 in various stages of breast cancer suggested its suitability as a novel tumor biomarker. Considering the vital role of microRNAs (miRNAs) in regulating the expression of most human genes, we hypothesized a concomitant downregulation of the bioinformatically-predicted piwil2-targetting microRNAs in breast cancer. METHOD We employed different bioinformatic tools to predict piwil2-targeting miRNAs. Then, from the list of predicted miRNAs, we chose two less studied miRNAs (miR-1267 and miR-2276) for experimental validation. Using a real-time RT-PCR approach, we quantified the relative expression of the miRNAs in 31 pairs of formalin-fixed paraffin-embedded tumor/non-tumor tissue samples. RESULTS Our data revealed a noticeable but not statistically significant (P = 0.133) downregulation of miR-1267 in tumor samples, compared to non-tumor samples obtained from the same patients. Downregulation of miR-1267 was more significant in higher grades of malignancies (fold change = 2.39, P = 0.033) and also in lymph nodes containing high-grade tumor cells (fold change = 6.66, P = 0.02). Interestingly, a significant upregulation of miR-1267 was observed in tumors at high stages (stage 3a, 3b), compared to low stages (stage 2a, 2b) (fold change = 8.05, P = 0.048). Similar patterns of expression alteration were also observed for miR-2276. CONCLUSION Altogether, our findings suggest a probable tumor suppressor role for miR-1267 and miR-2276 in breast tumor initiation and progression, but a probable promoting role for them in invasion and metastasis.
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Affiliation(s)
- S Torkashvand
- 1)Department of Genetics, Science and Research Branch Islamic Azad University, Tehran, Iran. 2)Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Z Damavandi
- Molecular Genetics Department, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | | | - M Tavallaei
- Genetic Research Center, Baqiyatallah Medical Sciences University, Tehran, Iran
| | - M Vasei
- Department of Pathology, Tehran University of Medical sciences, Tehran, Iran
| | - Seyed Javad Mowla
- Molecular Genetics Department, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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Barjaste A, Mirzaei B. The periodization of resistance training in soccer players: changes in maximal strength, lower extremity power, body composition and muscle volume. J Sports Med Phys Fitness 2017; 58:1218-1225. [PMID: 28229570 DOI: 10.23736/s0022-4707.17.07129-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The purpose of this study was to investigate the effect of 12 weeks traditional periodized resistance training on some physical capacities of soccer players. METHODS Eighteen amateur soccer players with very little experience in resistance training voluntarily participated in this study. Subjects were assigned into two groups; experimental (EX) group (N.=10) that conducted a traditional linear periodized resistance training program and a control (C) group (N.=8) that did not participate in any resistance training. Periodized resistance training in two mesocycles was used in this study: general or anatomical adaptation phase (6 weeks, 65-75% of 1RM, 11 exercises in each session) and maximal strength phase (6 weeks, 85-95% of 1RM, 3 to 4 exercises in each session). One repetition maximum (1RM) strength in lower and upper body, vertical jump (VJ) height, body composition, and muscle volume were measured at three different time points; baseline, after general phase, and after maximal strength phase. RESULTS The average of increase in 1RM all exercises in general phase was greater than the maximal strength phase, on average 29.38% and 9.67% respectively (P≤0.05). Also, the Percentage of change in VJ height in general phase was greater than the maximal strength phase (11.93% vs. 3.97% respectively) (P≤0.05). CONCLUSIONS The results of this study indicated that muscle strength and explosive performance in players with little experience in resistance training can significantly improve following the completion of general phase of resistance training periodization using moderate loads.
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Affiliation(s)
- Amir Barjaste
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran -
| | - Bahman Mirzaei
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
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Mirzaei B, Moosavi SF, Babaei R, Siadat SD, Vaziri F, Shahrooei M. Purification and Evaluation of Polysaccharide Intercellular Adhesion (PIA) Antigen from Staphylococcus epidermidis. Curr Microbiol 2016; 73:611-617. [PMID: 27460584 DOI: 10.1007/s00284-016-1098-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 06/17/2016] [Indexed: 01/02/2023]
Abstract
The polysaccharide intercellular adhesin (PIA) confers major functional effects in biofilm formation, which bears an important role in the pathogenicity of Staphylococcus epidermidis. Following the identification of biofilm-forming strains by biochemical and molecular methods, isogenic strain was prepared and in vitro biofilm formation assay was performed consequently. By parallel analysis of both the PIA-positive and PIA-negative strains using size exclusion chromatography by Fast protein liquid chromatography (FPLC) method, the respective PIA was purified. Recovered PIA was examined using colorimetric and hemagglutination assays. Finally, the recovered PIA was analyzed using Fourier-transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy methods. By the parallel purification process and comparison of the obtained graphs from the FPLC detector, fractions near the void volume were determined as PIA. The colorimetric and hemagglutination assays were applied and the content of carbohydrates (hexose = 620 µg/ml, hexosamine = 5700 µg/ml and ketoses = 170 µg/ml) and hemagglutination titer (1:128) in recovered polysaccharide were determined. This study shows that PIA has a significant role in the biofilm formation in S. epidermidis strains. The recovered polysaccharide and its molecular weight were analyzed within the near void volume of the utilized column.
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Affiliation(s)
- Bahman Mirzaei
- Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran.,Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran
| | - Seyed Fazlollah Moosavi
- Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran.,Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran
| | - Ryhane Babaei
- Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran.,Department of Mycobacteriology and pulmonary research, Pasteur Institute of Iran, Tehran, Iran
| | - Seyed Davar Siadat
- Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran. .,Department of Mycobacteriology and pulmonary research, Pasteur Institute of Iran, Tehran, Iran.
| | - Farzam Vaziri
- Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran.,Department of Mycobacteriology and pulmonary research, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Shahrooei
- Laboratory of Medical Microbiology, Department of Medical Diagnostic Sciences, KU Leuven, U.Z. Gasthuisberg, Herestraat 49 CDG 8th floor, 3000, Leuven, Belgium
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Rahimi R, Mirzaei B, Rahmani-Nia F, Salehi Z. Effects of creatine monohydrate supplementation on exercise-induced apoptosis in athletes: A randomized, double-blind, and placebo-controlled study. J Res Med Sci 2015; 20:733-8. [PMID: 26664419 PMCID: PMC4652305 DOI: 10.4103/1735-1995.168320] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Background: Creatine monohydrate (CrM) has been shown to be beneficial to health due to its antioxidant potential. Strenuous exercise is associated with oxidative stress, which could lead to apoptosis. We investigated the ability of CrM in amelioration of apoptosis induced by incremental aerobic exercise (AE) to exhaustion in young athletes. Materials and Methods: In a placebo-controlled, double-blind, randomized, parallel study, 31 young athletes (age 19.52 ± 2.75 years, body mass 79.24 ± 16.13 kg, height 1.73 ± 6.49 m, body fat 16.37% ± 5.92%) were randomly assigned to CrM (4 × 5 g/day, n = 15) or placebo (PL: 4 × 5 g/day of maltodextrine powder; n = 16) to investigate the effect of 7 days CrM on serum p53 and insulin-like growth factor-1 (IGF-1) concentration after acute incremental AE test to exhaustion. Subjects performed AE before (test 1) and after 7 days of supplementation (test 2). Results: Before supplementation, AE to exhaustion induced a significant increase in serum p53 and IGF-1 concentrations at both CrM and PL groups (P < 0.05). After supplementation, serum p53 concentrations were significantly lower in CrM than PL at post-AE (P < 0.05). There were no differences in IGF-1 concentrations between CrM and PL groups at post-AE (P > 0.05). Conclusion: Our results suggest that supplementation with CrM prevents apoptosis, as measured by decreases in p53 concentration, induced by AE to exhaustion in young athletes. However, CrM had no effect on IGF-1 concentration after AE to exhaustion in young athletes.
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Affiliation(s)
- Rahman Rahimi
- Department of Physical Education and Sport Sciences, University of Kurdistan, Sanandaj, Kurdistan, Iran
| | - Bahman Mirzaei
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
| | - Farhad Rahmani-Nia
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
| | - Zivar Salehi
- Department of Molecular Biology, Faculty of Science, University of Guilan, Rasht, Iran
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Rahmani-Nia F, Mirzaei B, Rahimi R. Effects of resistance exercise volume on appetite regulation and lipid profile in overweight young men. Sci Sports 2015. [DOI: 10.1016/j.scispo.2015.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mirzaei B, Moosavi SF, Babaei R, Siadat SD, Farjah A, Shahrooei M. Purification and evaluation of glycerol teichoic acid from biofilm forming Staphylococcus epidermidis as a putative vaccine candidate. vacres 2015. [DOI: 10.18869/acadpub.vacres.2.5.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Mirzaei B, Bameri Z, Babaei R, Shahcheraghi F. Isolation of High Level Macrolide Resistant Bordetella pertussis Without Transition Mutation at Domain V in Iran. Jundishapur J Microbiol 2015; 8:e18190. [PMID: 26396713 PMCID: PMC4575774 DOI: 10.5812/jjm.8(5)2015.18190] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 02/15/2014] [Revised: 07/31/2014] [Accepted: 09/24/2014] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Bordetella pertussis, as a causative agent of whooping cough, due to the annual rise y of infection cases, failure of prophylaxis and treatment by macrolides, is considered as the new concern in the health care system. OBJECTIVES The main objective of this study was the determination of single nucleotide polymorphisms (SNPs) at domain V, as the main binding site for macrolides, following the identification of high level macrolides resistant B. pertussis. MATERIALS AND METHODS Following the identification of 11 recovered B. pertussis isolates, from a total of 1084 nasopharyngeal swabs, by using the biochemical and molecular methods, the activities of erythromycin, azithromycin and clarithromycin antibiotics against the recovered isolates were examined. Subsequently, A-G transition mutations in domain V were analyzed by molecular techniques, such as Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) and sequencing. RESULTS After susceptibility testing, one strain was detected as a high level macrolide resistant B. pertussis (Erythromycin = 128 μg/mL, Clarithromycin > 256 μg/mL). After sequencing and PCR-RFLP methods, transition mutations in positions 2047 and 2058 of the mentioned domain were not observed. CONCLUSIONS Although previous studies have shown that A-G transition mutations in 23 SrRNA gene (domain V) are the main reason for the occurrence of high level macrolides resistance in B. pertussis, however, the mentioned single nucleotide polymorphisms (SNPs) have not been detected in our resistant strain. This is the first report of high level macrolide resistant B. pertussis, without SNPs in domain V, in Iran.
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Affiliation(s)
- Bahman Mirzaei
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, IR Iran
| | - Zakaria Bameri
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, IR Iran
| | - Ryhane Babaei
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, IR Iran
| | - Fereshteh Shahcheraghi
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, IR Iran
- Corresponding author: Fereshteh Shahcheraghi, Department of Bacteriology, Pasteur Institute of Iran, Tehran, IR Iran. Tel: +98-2166953311, Fax: +98-2166953331, E-mail:
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Abstract
Twenty seven isolates of vancomycin resistant Enterococci
based on the disk diffusion and E- test have been screened; being found eight (0.3%) clinical isolates of vanA
& vanB
through Taq Man Real Time PCR assay. This study shows the presence of both vanA
& vanB
genotypes in vanA
phenotypes clinical isolates in the three hospitals in Iran.
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Affiliation(s)
| | | | | | - Zakaria Bameri
- Research Center for Infectious Disease and Tropical Medicine, Zahedan University of Medical Science, Zahedan, Iran
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Kashefi Z, Mirzaei B, Shabani R. The effects of eight weeks selected aerobic exercises on sleep quality of middle-aged non-athlete females. Iran Red Crescent Med J 2014; 16:e16408. [PMID: 25237565 PMCID: PMC4166084 DOI: 10.5812/ircmj.16408] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/12/2014] [Accepted: 01/25/2014] [Indexed: 12/04/2022]
Abstract
Background: Sleep is considered as one of the most important factors, directly influencing mental and physical health components. In the last decade, low sleep quality - i.e. poor sleep - has become one of the major problems of the individuals, especially in middle-aged women. Low quality sleep also directly influences memory, functional components, nutrition, and mood. Objectives: This study aims to detect the effect of selected aerobic exercises on sleep quality in non-athlete middle-aged women. Materials and Methods: Fifteen non-athlete middle-aged women participated in this study, all of them suffered from insomnia. Pittsburgh questionnaire was used for determining sleep quality in this sample. Four indices including sleep duration, sleep disturbance, sleep latency, and sleep efficiency have been investigated through this. The period of exercises included eight weeks, three one-hour sessions each week. The sample group was trained during eight weeks through performance of selected aerobic exercises including three groups: sequential movements equip mental movement and movements on the pad. The selected protocol included performance of exercises: 10 minutes for warm up, 10 minutes for sequential movements, 20 minutes for movements by using equipment, 15 minutes for movements performed on the pad, and 5 minutes for cooling down. The exercises during the first four weeks have been presented with 60% increase of the heart rate, and 75% increase during the second four weeks. The sample group was provided with Pittsburgh questionnaire at the beginning of the exercises and the end of each week. The information of each person was registered. Results: The results showed that the mean of sleep duration, sleep disturbance, sleep latency, and sleep efficiency indices significantly reduced 32%, 22%, 30%, 14% and 36%, respectively. The results also showed that the trend of changes in sleep duration, sleep disturbance, sleep latency, and sleep efficiency indices had significant descending trend. Conclusions: We concluded that eight weeks of aerobic exercises can significantly increase sleep quality in middle-aged women.
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Affiliation(s)
- Zahra Kashefi
- Department of Physical Education, Islamic Azad University, Rasht Branch, Rasht, IR Iran
- Corresponding Authors: Zahra Kashefi, Islamic Azad University, Rasht Branch, Rasht, IR Iran. Tel: +98-9123728959, E-mail: sh_kashefi@ yahoo.com; Ramin Shabani, Department of Physical Education, Islamic Azad University, Rasht Branch, Rasht, IR Iran. Tel: +98-9123728959, Fax: +98-1314224088, E-mail:
| | - Bahman Mirzaei
- Faculty of Physical Education, University of Guilan, Rasht, IR Iran
| | - Ramin Shabani
- Department of Physical Education, Islamic Azad University, Rasht Branch, Rasht, IR Iran
- Corresponding Authors: Zahra Kashefi, Islamic Azad University, Rasht Branch, Rasht, IR Iran. Tel: +98-9123728959, E-mail: sh_kashefi@ yahoo.com; Ramin Shabani, Department of Physical Education, Islamic Azad University, Rasht Branch, Rasht, IR Iran. Tel: +98-9123728959, Fax: +98-1314224088, E-mail:
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Arazi H, Mirzaei B, Heidari N. Neuromuscular and metabolic responses to three different resistance exercise methods. Asian J Sports Med 2014; 5:30-8. [PMID: 24868429 PMCID: PMC4009085 DOI: 10.5812/asjsm.34229] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 10/05/2013] [Indexed: 11/17/2022] Open
Abstract
PURPOSE The aim of this study was to compare the effect of resistance exercise with three different methods on integrated electromyography (IEMG) and metabolic responses in recreational athletes. METHODS Twenty four males (mean 23.59±0.87 years) were randomly assigned to three experimental groups. Participants performed knee extension exercises: Slow (SL: 3-3, 3s for each concentric and eccentric action with 50% of 1 RM), Normal (NH: 1-1, 1 s for each concentric and eccentric action 80% of 1 RM) and Traditional (TH: 2-4, 2s for concentric and 4s for eccentric action with 80% of 1 RM). Plasma lactate, glucose and triglyceride concentration and IEMG was measured before and immediately after performing four sets of resistance exercise. RESULTS Each method significantly decreased IEMG (P<0.05), but there was no significant difference between groups. Lactate was increased following TH and NH more than SL method (P<0.05). Each method significantly increased plasma glucose (P<0.05). Work considering time under tension (workTUT) was higher (P<0.05) during TH method than the other methods and during SL it was higher than NH method (P<0.05). Volume load was higher (P<0.05) during NH than the other two methods and during TH it was higher than SL method (P<0.05). CONCLUSION These results indicate that exercise intensity during the resistance exercise is important for the enhancement of lactate responses, but the slow resistance exercise method could induce acute neuromuscular response as much as high intensity methods. It seems that this method will be advantageous for those who want to increase acute neuromuscular changes with low exercise intensity and volume.
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Affiliation(s)
- Hamid Arazi
- Address: Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Iran.
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Mirzaei B, Curby DG, Barbas I, Lotfi N. Anthropometric and physical fitness traits of four-time World Greco-Roman wrestling champion in relation to national norms: A case study. JHSE 2011. [DOI: 10.4100/jhse.2011.62.21] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Rahimi R, Ghaderi M, Mirzaei B, Ghaeni S, Faraji H, Vatani DS, Rahmani-Nia F. Effects of very short rest periods on immunoglobulin A and cortisol responses to resistance exercise in men. jhse 2010. [DOI: 10.4100/jhse.2010.52.05] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Abstract
The purpose of the present investigation was to describe the physiological profile of elite Iranian junior freestyle wrestlers. Seventy elite wrestlers (age 19.8 +/- 0.9 years) who were invited to the national training camps, based on their top 10 national ranking, participated in this study. The physiological profile included body weight, flexibility (sit and reach test), maximal oxygen consumption (Bruce protocol), maximal anaerobic power of the legs (Wingate test), muscular endurance and strength (bench press, squat, pull-ups, push-ups, grip strength, and bent-knee sit-up test), speed (40-m sprint), agility (4 x 9-m shuttle run), and body composition (7-site skinfold). The major results (mean +/- SD) are as follows: body weight (kg): 77.5 +/- 19.8; flexibility (cm): 38.2 +/- 3.94; maximal oxygen consumption (ml kg(-1) min(-1)): 50.5 +/- 4.7; maximal anaerobic power of the legs (W): 455.5 +/- 87.6; 1-repetition maximum bench press (weight lifted kg body weight(-1)): 1.4 +/- 0.15; 1-repetition maximum squat (weight lifted kg body weight): 1.7 +/- 0.2; push-ups (n): 66.9 +/- 7.6; pull-ups (n): 31.6 +/- 9.7; grip strength (force in kg body weight kg(-1)) 1.02 +/- 0.11; bent-knee sit-ups (n): 66.5 +/- 8; speed (s): 5.07 +/- 0.17; agility (s): 8.7 +/- 0.25; and body fat (%): 10.6 +/- 3.8. The present study provides baseline physiological data that have been used in the prescription of individual training programs for these athletes. This information is also available to the coaches and can contribute to the general strategy employed by a wrestler and for a specific match.
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Affiliation(s)
- Bahman Mirzaei
- Department of Sport Sciences, University of Guilan, Rasht, Iran
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