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  1. Article ; Online: A statistical approach to enhance the productivity of Streptomyces baarensis MH-133 for bioactive compounds.

    Kalaba, Mohamed H / El-Sherbiny, Gamal M / Darwesh, Osama M / Moghannem, Saad A

    Synthetic and systems biotechnology

    2024  Volume 9, Issue 2, Page(s) 196–208

    Abstract: The goal of this study was to use statistical optimization to change the nutritional and environmental conditions so ... ...

    Abstract The goal of this study was to use statistical optimization to change the nutritional and environmental conditions so that
    Language English
    Publishing date 2024-02-08
    Publishing country China
    Document type Journal Article
    ISSN 2405-805X
    ISSN (online) 2405-805X
    DOI 10.1016/j.synbio.2024.01.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Antibacterial, Antibiofilm and Anti-Inflammatory Activities of Eugenol Clove Essential Oil against Resistant

    Elbestawy, Mahmoud K M / El-Sherbiny, Gamal M / Moghannem, Saad A

    Molecules (Basel, Switzerland)

    2023  Volume 28, Issue 6

    Abstract: Eugenol essential oil (EEO) is the major component in aromatic extracts ... ...

    Abstract Eugenol essential oil (EEO) is the major component in aromatic extracts of
    MeSH term(s) Humans ; Oils, Volatile/chemistry ; Eugenol/pharmacology ; Clove Oil/pharmacology ; Helicobacter pylori ; Syzygium/chemistry ; Anti-Bacterial Agents/chemistry ; Anti-Inflammatory Agents/pharmacology ; Biofilms
    Chemical Substances Oils, Volatile ; Eugenol (3T8H1794QW) ; Clove Oil ; Anti-Bacterial Agents ; Anti-Inflammatory Agents
    Language English
    Publishing date 2023-03-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules28062448
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: A review – plant essential oils active against Helicobacter pylori

    El-Sherbiny, Gamal M. / Elbestawy, Mahmoud K. M.

    Journal of essential oil research. 2022 May 04, v. 34, no. 3

    2022  

    Abstract: Helicobacter pylori (H. pylori) is an important pathogen in the gastrointestinal which colonizes the mucoid layer of the stomach in approximately 50% of humans worldwide. It is closely associated with chronic gastritis, peptic ulcers, and gastric cancer. ...

    Abstract Helicobacter pylori (H. pylori) is an important pathogen in the gastrointestinal which colonizes the mucoid layer of the stomach in approximately 50% of humans worldwide. It is closely associated with chronic gastritis, peptic ulcers, and gastric cancer. Current research and clinical challenge are the increased rate of H. pylori resistance to antibiotics. For this reason, the search for an alternative and effective new therapeutic scheme is important and urgent. The aim of this review is to highlight plants’ essential oils that exhibit potential anti-H. pylori activity. Electronic databases, NCBI-PubMed, and Science Direct were explored for plant essential oils with anti-H. pylori properties using keywords plant essential oils against H. pylori, virulence factor.
    Keywords Helicobacter pylori ; essential oils ; gastritis ; pathogens ; research ; stomach ; stomach neoplasms ; therapeutics ; virulence
    Language English
    Dates of publication 2022-0504
    Size p. 203-215.
    Publishing place Taylor & Francis
    Document type Article
    ZDB-ID 2197652-1
    ISSN 2163-8152 ; 1041-2905
    ISSN (online) 2163-8152
    ISSN 1041-2905
    DOI 10.1080/10412905.2022.2025464
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Correlation between phenotypic virulence traits and antibiotic resistance in Pseudomonas aeruginosa clinical isolates

    Nassar, Osama / Desouky, Said E. / El-Sherbiny, Gamal M. / Abu-Elghait, Mohammed

    Microbial pathogenesis. 2022 Jan., v. 162

    2022  

    Abstract: Pseudomonas aeruginosa is a ubiquitous pathogen capable of infecting virtually all tissues and its one of the standout amongst the most hazardous microorganisms of high morbidity and mortality rates especially in debilitated patients with few successful ... ...

    Abstract Pseudomonas aeruginosa is a ubiquitous pathogen capable of infecting virtually all tissues and its one of the standout amongst the most hazardous microorganisms of high morbidity and mortality rates especially in debilitated patients with few successful antibiotic choices available. This pathogen regulating most virulence traits by that so-called quorum sensing (QS), a cell to cell communication system. the present study was intended to phenotypically evaluate the activity of specific virulence traits (including swarming and swimming motility, protease, pyocyanin, and biofilm production) in Pseudomonas aeruginosa clinical isolates and assess the statistical correlation between these traits and antibiotic resistance. One hundred and thirteen bacterial isolates were obtained from different clinical samples and identified as P. aeruginosa, among them, 73.4% have the ability to forming biofilm with different degrees; 59.2% were able to produce pyocyanin pigment while all isolates having the ability to make swarming and swimming motility and able to produce protease enzyme with different degrees. The isolates that produce the higher levels of the virulence traits were identified by both biochemical using Vitek2 automated system and genetically via 16s rRNA gene analysis. The statistical analysis results indicate that a positive significant correlation was found between biofilm formation and other studied virulence traits except for protease (r = 0.584: 0.324, P < 0.05) while a non-significant correlation was found between biofilm formation and protease activity (r = 0.105, P ˃ 0.05). Swimming and swarming motility have a positive significant correlation with other studied virulence traits (r = 0.613: 0.297, P < 0.05) except for protease. Pyocyanin pigment production have a positive significant correlation with other studied virulence traits (r = 0.33: 0.297, P < 0.05) except for protease. on the other hand, negative significant correlations were found between biofilm formation, swimming; and swarming motility, Pyocyanin pigment production, and the susceptibility of antibiotics (r = −0.512: −0.281, P < 0.05). Detection of such correlations in P. aeruginosa is useful for study the behavior of this pathogen and may be provide a new target for the treatment of MDR infections.
    Keywords Pseudomonas aeruginosa ; antibiotic resistance ; antibiotics ; biofilm ; cell communication ; communications technology ; enzyme activity ; genes ; morbidity ; mortality ; pathogenesis ; pathogens ; phenotype ; proteinases ; pyocyanin ; statistical analysis ; virulence
    Language English
    Dates of publication 2022-01
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 632772-2
    ISSN 1096-1208 ; 0882-4010
    ISSN (online) 1096-1208
    ISSN 0882-4010
    DOI 10.1016/j.micpath.2021.105339
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Control of extensively drug-resistant Pseudomonas aeruginosa co-harboring metallo-β-lactamase enzymes with oprD gene downregulation.

    El-Sherbiny, Gamal M / Basha, Amr Mohamad / Mabrouk, Mona I

    Indian journal of medical microbiology

    2021  Volume 40, Issue 1, Page(s) 51–56

    Abstract: Purpose: to study control and treatment of infection with extensive drug-resistant carbapenem-resistant Pseudomonas aeruginosa (XDR-CRPA).: Methods: Eleven Pseudomonas aeruginosa (XDR-CRPA) strains used in this study were isolated from a clinical ... ...

    Abstract Purpose: to study control and treatment of infection with extensive drug-resistant carbapenem-resistant Pseudomonas aeruginosa (XDR-CRPA).
    Methods: Eleven Pseudomonas aeruginosa (XDR-CRPA) strains used in this study were isolated from a clinical sample, identified, and antibiotics susceptibility recorded in a previous study. Real-time PCR (RT-PCR) was performed to determine the expression level of the OprD gene. Besides, a checkerboard technique was performed to assess the effect of polymyxin-B (POX), colistin (COL), rifampicin (RIF), imipenem (IPM), and meropenem (MEM) during 2 and 3- dimensional antibiotic combinations. Further, the time-kill study was determined for the most potent combination against four representative strains, log
    Results: Molecular analysis by Real-time PCR revealed that the diminished expression level of OprD mRNA was overwhelming to various degrees. The checkerboard method demonstrated that the relevant synergism was achieved in 90.9% of strains for both carbapenem antibiotics during the triple combinations. While an additive effect was noted for all the dual regimen assays. Regarding time-kill experiments, a remarkable bactericidal effect with [99.9% killing rate] was observed toward only one strain whilst a bacteriostatic attitude was proven with ≥95% bacterial eradication against the three remaining strains.
    Conclusions: These findings underscore the promising implications of these combinations for treatment against XDR-Pseudomonas aeruginosa even they are resistant to carbapenems due to multiple mechanisms of action.
    MeSH term(s) Anti-Bacterial Agents/therapeutic use ; Carbapenems/pharmacology ; Carbapenems/therapeutic use ; Down-Regulation ; Humans ; Microbial Sensitivity Tests ; Pseudomonas Infections/drug therapy ; Pseudomonas Infections/microbiology ; Pseudomonas aeruginosa/genetics ; beta-Lactamases/genetics ; beta-Lactamases/metabolism
    Chemical Substances Anti-Bacterial Agents ; Carbapenems ; beta-Lactamases (EC 3.5.2.6)
    Language English
    Publishing date 2021-11-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1038798-5
    ISSN 1998-3646 ; 0255-0857
    ISSN (online) 1998-3646
    ISSN 0255-0857
    DOI 10.1016/j.ijmmb.2021.11.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Gamma-ray and sunlight-induced synthesis of silver nanoparticles using bacterial cellulose and cell-free filtrate produced by Komagataeibacter rhaeticus N1 MW322708 strain

    Mohammad, Nasser H. / EL-Sherbiny, Gamal M. / Hammad, Ali A. / Askar, Ahmed A. / El- Nour, Salwa A. Abou

    Cellulose. 2022 Feb., v. 29, no. 3

    2022  

    Abstract: Antibacterial coatings based on bacterial cellulose (BC) have been widely used in many fields including food packaging and wound dressing. In this study, we aimed to synthesis of colloidal AgNPs and BC/ AgNP composite by using two green, facile methods, ... ...

    Abstract Antibacterial coatings based on bacterial cellulose (BC) have been widely used in many fields including food packaging and wound dressing. In this study, we aimed to synthesis of colloidal AgNPs and BC/ AgNP composite by using two green, facile methods, the first one by using BC produced by K. rhaeticus N1 MW322708 as a reducing agent in one step reaction induced by gamma-ray. The second approach was achieved by using K. rhaeticus N1 MW322708 cell-free filtrate (CFF) as a reducing agent under the induction action of sunlight. The optical spectra of synthesized AgNPs revealed that the surface Plasmon resonance was localized around 420 and 415 nm for method 1 and method 2, respectively. DLS analysis showed that the Z-Average (nm) of synthesized AgNPs was 42.23 and 36.36 nm for method 1 and method 2 respectively, while the zeta potential was − 27.7 and − 32.7 mV for the first and second method, respectively. TEM images revealed the spherical shape of synthesized AgNPs for two methods. The results of FESEM, FTIR, and XRD confirmed the formation of BC/AgNP composite for two methods. BC/AgNP composite (1 and 2) and AgNPs produced by the two methods, exhibited antibacterial potency against both Gram-positive and Gram-negative bacteria. We concluded that the two green, non-toxic, economical, and novel two methods presented in this paper offer promising routes for both AgNPs and BC/AgNP composite synthesis and have the potential to be applied in the future development of food packing, biomedical instruments, and therapeutics.
    Keywords cellulose ; filtrates ; nanosilver ; solar radiation ; surface plasmon resonance ; therapeutics ; zeta potential
    Language English
    Dates of publication 2022-02
    Size p. 1791-1805.
    Publishing place Springer Netherlands
    Document type Article
    ZDB-ID 1496831-9
    ISSN 1572-882X ; 0969-0239
    ISSN (online) 1572-882X
    ISSN 0969-0239
    DOI 10.1007/s10570-021-04356-x
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Nanoemulsion of cinnamon oil to combat colistin-resistant Klebsiella pneumoniae and cancer cells.

    El-Sherbiny, Gamal M / Kalaba, Mohamed H / Foda, Abdullah M / M E, Shehata / Youssef, Amira Salah El-Din / A Elsehemy, Islam / Farghal, Eman E / El-Fakharany, Esmail M

    Microbial pathogenesis

    2024  , Page(s) 106705

    Abstract: This study aimed to investigate the potential of cinnamon oil nanoemulsion (CONE) as an antibacterial agent against clinical strains of colistin-resistant Klebsiella pneumoniae and its anticancer activity. The prepared and characterized CONE was found to ...

    Abstract This study aimed to investigate the potential of cinnamon oil nanoemulsion (CONE) as an antibacterial agent against clinical strains of colistin-resistant Klebsiella pneumoniae and its anticancer activity. The prepared and characterized CONE was found to have a spherical shape with an average size of 70.6 ± 28.3 nm under TEM and a PDI value of 0.076 and zeta potential value of 6.9 mV using DLS analysis. The antibacterial activity of CONE against Klebsiella pneumoniae strains was investigated, and it was found to have higher inhibitory activity (18.3±1.2 -30.3±0.8 mm) against the tested bacteria compared to bulk cinnamon oil (14.6±0.88- 20.6±1.2) with MIC values ranging from 0.077 to 0.31% v/v which equivalent to 0.2 - 0.82 ng/ml of CONE. CONE inhibited the growth of bacteria in a dose and time-dependent manner based on the time-kill assay in which Klebsiella pneumoniae B-9 was used as a model among the bacterial strains under investigation. The study also investigated the expression of the mcr-1 gene in the Klebsiella pneumoniae strains and found that all strains were positive for the gene expression and subsequently its presence. The level of mcr-1 gene expression among the B-2, B-4, B-9, and B-11 control strains and that treated with colistin was similar, but it was different in both B-5 and B-2. However, all strains exhibited a significant downregulation in gene expression (ranging from 3.97 to 8.7-fold) after their treatment with CONE. Additionally, the CONE-treated bacterial cells appeared with a great deformation compared with control cells under TEM. Finally, CONE exhibited selective toxicity against different cancer cell lines depending on comparison with the normal cell lines.
    Language English
    Publishing date 2024-05-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 632772-2
    ISSN 1096-1208 ; 0882-4010
    ISSN (online) 1096-1208
    ISSN 0882-4010
    DOI 10.1016/j.micpath.2024.106705
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Enhanced removal of fifteen pesticide mixture by a single bacterial strain using response surface methodology and its application in raw milk.

    Wageed, Mohamed / El-Sherbiny, Gamal M / Sharaf, Mohammed H / Moghannem, Saad A / Hamzawy, Ahmed H

    Journal of environmental health science & engineering

    2021  Volume 19, Issue 2, Page(s) 1277–1286

    Abstract: Purpose: Environmental contamination with various pesticides accompanied by uncontrolled use contributes to severe ecological and health problems. Although extensive research was conducted on pesticides degradation, very few reports have demonstrated ... ...

    Abstract Purpose: Environmental contamination with various pesticides accompanied by uncontrolled use contributes to severe ecological and health problems. Although extensive research was conducted on pesticides degradation, very few reports have demonstrated the degradation of mixed pesticides. Consequently, this study aimed to evaluate the removal efficacy of highly potent bacterial isolate for pesticide mixture under optimal culture conditions, followed by their application in milk.
    Methods: Isolation and selection of bacterial isolates were performed from 40 milk samples by enrichment culture technique and were screened to obtain highly potent bacterial strain identified by 16 S rDNA analysis. The statistics-based experimental designs were applied to optimize the culture conditions towards the best degradation of pesticides mixture, followed by subsequent utilization in milk. The degradation ratio of pesticides was analyzed using gas chromatography-mass spectrometry.
    Results: In this study, a bacterial strain S6A identified as
    Conclusions: The obtained results assist in eliminating environmental contamination with various groups of pesticide residues. Furthermore, it can be employed in reducing pesticide residues that cause milk contamination to increase safety and quality.Graphical abstract.
    Supplementary information: The online version contains supplementary material available at 10.1007/s40201-021-00683-0.
    Language English
    Publishing date 2021-07-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2756287-6
    ISSN 2052-336X
    ISSN 2052-336X
    DOI 10.1007/s40201-021-00683-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Correlation between phenotypic virulence traits and antibiotic resistance in Pseudomonas aeruginosa clinical isolates.

    Nassar, Osama / Desouky, Said E / El-Sherbiny, Gamal M / Abu-Elghait, Mohammed

    Microbial pathogenesis

    2021  Volume 162, Page(s) 105339

    Abstract: Pseudomonas aeruginosa is a ubiquitous pathogen capable of infecting virtually all tissues and its one of the standout amongst the most hazardous microorganisms of high morbidity and mortality rates especially in debilitated patients with few successful ... ...

    Abstract Pseudomonas aeruginosa is a ubiquitous pathogen capable of infecting virtually all tissues and its one of the standout amongst the most hazardous microorganisms of high morbidity and mortality rates especially in debilitated patients with few successful antibiotic choices available. This pathogen regulating most virulence traits by that so-called quorum sensing (QS), a cell to cell communication system. the present study was intended to phenotypically evaluate the activity of specific virulence traits (including swarming and swimming motility, protease, pyocyanin, and biofilm production) in Pseudomonas aeruginosa clinical isolates and assess the statistical correlation between these traits and antibiotic resistance. One hundred and thirteen bacterial isolates were obtained from different clinical samples and identified as P. aeruginosa, among them, 73.4% have the ability to forming biofilm with different degrees; 59.2% were able to produce pyocyanin pigment while all isolates having the ability to make swarming and swimming motility and able to produce protease enzyme with different degrees. The isolates that produce the higher levels of the virulence traits were identified by both biochemical using Vitek2 automated system and genetically via 16s rRNA gene analysis. The statistical analysis results indicate that a positive significant correlation was found between biofilm formation and other studied virulence traits except for protease (r = 0.584: 0.324, P < 0.05) while a non-significant correlation was found between biofilm formation and protease activity (r = 0.105, P ˃ 0.05). Swimming and swarming motility have a positive significant correlation with other studied virulence traits (r = 0.613: 0.297, P < 0.05) except for protease. Pyocyanin pigment production have a positive significant correlation with other studied virulence traits (r = 0.33: 0.297, P < 0.05) except for protease. on the other hand, negative significant correlations were found between biofilm formation, swimming; and swarming motility, Pyocyanin pigment production, and the susceptibility of antibiotics (r = -0.512: -0.281, P < 0.05). Detection of such correlations in P. aeruginosa is useful for study the behavior of this pathogen and may be provide a new target for the treatment of MDR infections.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Biofilms ; Drug Resistance, Microbial ; Humans ; Pseudomonas Infections ; Pseudomonas aeruginosa/genetics ; Quorum Sensing ; RNA, Ribosomal, 16S ; Virulence ; Virulence Factors/genetics
    Chemical Substances Anti-Bacterial Agents ; RNA, Ribosomal, 16S ; Virulence Factors
    Language English
    Publishing date 2021-12-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 632772-2
    ISSN 1096-1208 ; 0882-4010
    ISSN (online) 1096-1208
    ISSN 0882-4010
    DOI 10.1016/j.micpath.2021.105339
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  10. Article ; Online: Antibacterial activity of essential oils for combating colistin-resistant bacteria.

    Foda, Abdullah M / Kalaba, Mohamed H / El-Sherbiny, Gamal M / Moghannem, Saad A / El-Fakharany, Esmail M

    Expert review of anti-infective therapy

    2022  Volume 20, Issue 10, Page(s) 1351–1364

    Abstract: Objectives: Colistin (polymyxin E) is a bactericidal antibiotic used to treat severe infections caused by multidrug-resistant Gram-negative bacteria. The product of the : Methods: Twenty-seven bacterial isolates were collected from patients who were ... ...

    Abstract Objectives: Colistin (polymyxin E) is a bactericidal antibiotic used to treat severe infections caused by multidrug-resistant Gram-negative bacteria. The product of the
    Methods: Twenty-seven bacterial isolates were collected from patients who were admitted to the National Cancer Institute, Cairo, Egypt, and processed using standard microbiological methods. Essential oils were purchased from AB Chem Company, Egypt, screened for antibacterial, cytotoxic activity, and (GC-MS) analysis.
    Results: A total of 5 bacterial isolates were resistant to colistin with minimum inhibitory concentration (MIC) ranging from 6.25->200 µg/ml. Cinnamon oil exhibited the highest activity against colistin-resistant strains followed by thyme and eucalyptus oil. The (MIC) of cinnamon oils against resistant strains ranged from 4.88 to 312.5 µg/ml. Moreover, mcr-1 gene expression was extremely down-regulated after the treatment of bacterial strains with cinnamon oil and decreased to 20-35-fold. Examination of treated bacterial cells with sub-inhibitory concentrations under transmission electron microscopy showed various abnormalities occurred in most of these cells.
    Conclusions: Cinnamon oil exhibits antibacterial activity against colistin-resistant strains, showing it as a promising natural alternative in clinical therapy.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Bacteria ; Colistin/pharmacology ; Eucalyptus Oil ; Humans ; Microbial Sensitivity Tests ; Oils, Volatile/pharmacology
    Chemical Substances Anti-Bacterial Agents ; Oils, Volatile ; Eucalyptus Oil (2R04ONI662) ; Colistin (Z67X93HJG1)
    Language English
    Publishing date 2022-07-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2181279-2
    ISSN 1744-8336 ; 1478-7210
    ISSN (online) 1744-8336
    ISSN 1478-7210
    DOI 10.1080/14787210.2022.2101997
    Database MEDical Literature Analysis and Retrieval System OnLINE

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