1
|
Wani AK, Chopra C, Ansari MA, Dar MA, Américo-Pinheiro JHP, Singh R. Characterization of thermostable carboxypeptidase from high-altitude hot spring metagenome. Int J Biol Macromol 2024; 276:133974. [PMID: 39029824 DOI: 10.1016/j.ijbiomac.2024.133974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 07/01/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
This study explored the metagenome of the Pir Panjal Hot Spring (PPHS) to identify thermostable hydrolases. The carboxypeptidase (CarP) gene was successfully amplified and cloned into Escherichia coli DH5-α cells, followed by expression in E. coli BL21-DE3 cells. The CarP enzyme was comprehensively characterized in vitro. Sequencing analysis revealed an open reading frame encoding a functional protein of 504 amino acids, with a molecular weight of 58.65 kDa and an isoelectric point of 4.81. The CarP protein was purified using Ni-His affinity chromatography, and the experimental molecular weight matched in silico predictions. The enzyme exhibited significant thermostability and alkaliphilic properties, with optimal activity at 70 °C and pH 10.0. Additionally, the presence of Zn+2 ions at concentrations of 5 and 10 mmol/L enhanced protease activity by 1.4 and 1.5-fold, respectively. This study reports the discovery of a novel, multifunctional, and thermostable CarP from hot-spring metagenomes. The enzyme's stability against high temperatures, metal ions, surfactants, and inhibitors, along with its specific substrate interactions, highlights its potential for various biotechnological applications.
Collapse
Affiliation(s)
- Atif Khurshid Wani
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar 144411, Punjab, India
| | - Chirag Chopra
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar 144411, Punjab, India
| | - Mushtaq Ahmad Ansari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mudasir A Dar
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, 212013, China
| | - Juliana Heloisa Pinê Américo-Pinheiro
- São Paulo State University (UNESP), School of Agricultural Sciences, Botucatu, Department of Forest Science, Soils and Environment, Ave. Universitária, 3780, Botucatu, SP 18610-034, Brazil; Graduate Program in Environmental Sciences, Brazil University, Street Carolina Fonseca, 584, São Paulo, SP 08230-030, Brazil.
| | - Reena Singh
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar 144411, Punjab, India.
| |
Collapse
|
2
|
Filippova TA, Masamrekh RA, Khudoklinova YY, Shumyantseva VV, Kuzikov AV. The multifaceted role of proteases and modern analytical methods for investigation of their catalytic activity. Biochimie 2024; 222:169-194. [PMID: 38494106 DOI: 10.1016/j.biochi.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 03/07/2024] [Accepted: 03/11/2024] [Indexed: 03/19/2024]
Abstract
We discuss the diverse functions of proteases in the context of their biotechnological and medical significance, as well as analytical approaches used to determine the functional activity of these enzymes. An insight into modern approaches to studying the kinetics and specificity of proteases, based on spectral (absorption, fluorescence), mass spectrometric, immunological, calorimetric, and electrochemical methods of analysis is given. We also examine in detail electrochemical systems for determining the activity and specificity of proteases. Particular attention is given to exploring innovative electrochemical systems based on the detection of the electrochemical oxidation signal of amino acid residues, thereby eliminating the need for extra redox labels in the process of peptide synthesis. In the review, we highlight the main prospects for the further development of electrochemical systems for the study of biotechnologically and medically significant proteases, which will enable the miniaturization of the analytical process for determining the catalytic activity of these enzymes.
Collapse
Affiliation(s)
- Tatiana A Filippova
- Institute of Biomedical Chemistry, 10 bld. 8, Pogodinskaya str., 119121, Moscow, Russia; Pirogov Russian National Research Medical University, 1, Ostrovityanova Street, Moscow, 117513, Russia
| | - Rami A Masamrekh
- Institute of Biomedical Chemistry, 10 bld. 8, Pogodinskaya str., 119121, Moscow, Russia; Pirogov Russian National Research Medical University, 1, Ostrovityanova Street, Moscow, 117513, Russia
| | - Yulia Yu Khudoklinova
- Pirogov Russian National Research Medical University, 1, Ostrovityanova Street, Moscow, 117513, Russia
| | - Victoria V Shumyantseva
- Institute of Biomedical Chemistry, 10 bld. 8, Pogodinskaya str., 119121, Moscow, Russia; Pirogov Russian National Research Medical University, 1, Ostrovityanova Street, Moscow, 117513, Russia
| | - Alexey V Kuzikov
- Institute of Biomedical Chemistry, 10 bld. 8, Pogodinskaya str., 119121, Moscow, Russia; Pirogov Russian National Research Medical University, 1, Ostrovityanova Street, Moscow, 117513, Russia.
| |
Collapse
|
3
|
Said MM, Abo-Al-Ela HG, El-Barbary YA, Ahmed OM, Dighiesh HS. Influence of stocking density on the growth, immune and physiological responses, and cultivation environment of white-leg shrimp (Litopenaeus vannamei) in biofloc systems. Sci Rep 2024; 14:11147. [PMID: 38750082 PMCID: PMC11096186 DOI: 10.1038/s41598-024-61328-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 05/03/2024] [Indexed: 05/18/2024] Open
Abstract
Biofloc (BF) stands out as a promising system for sustainable shrimp farming. Optimizing various culture conditions, such as stocking density, carbohydrate source, and feeding management, is crucial for the widespread adoption of the BF system. This study compares the growth performance of white-leg shrimp (Litopenaeus vannamei) in culture ponds at low density (LD) with 50 organisms/m2 and high density (HD) with 200 organisms/m2. Post-larvae of white-leg shrimp were stocked for 16 weeks in both LD and HD groups. The LD group exhibited a superior survival rate, growth rate, and feed consumption compared to the HD group. The BF from the LD system recorded a significantly higher protein content (16.63 ± 0.21%) than the HD group (15.21 ± 0.34%). Heterotrophic bacterial counts in water did not significantly differ with stocking density. However, Vibrio count in water samples was higher in the HD group (3.59 ± 0.35 log CFU/mL) compared to the LD group (2.45 ± 0.43 log CFU/mL). The whole shrimp body analysis revealed significantly higher protein and lipid content in the LD group. In contrast, the total aerobic bacterial count in shrimp from the HD group was high, with the identification of Salmonella enterica ssp. arizonae. Additionally, Vibrio counts in shrimp samples were significantly higher in the HD group (4.63 ± 0.32 log CFU/g) compared to the LD group (3.57 ± 0.22 log CFU/g). The expression levels of immune-associated genes, including prophenoloxidase, transglutaminase, penaiedin 3, superoxide dismutase, lysozyme, serine proteinase, and the growth-related gene ras-related protein (rap-2a), were significantly enhanced in the LD group. Conversely, stress-related gene expression increased significantly in the HD group. Hepatopancreases amylase, lipase, and protease were higher in the LD group, while trypsin activity did not differ significantly. Antioxidant enzyme activity (catalase, glutathione, glutathione peroxidase, and superoxide dismutase) significantly increased in the LD group. The histological structure of hepatopancreas, musculature, and female gonads remained similar in both densities. However, negative effects were observed in the gills' histology of the HD group. These results suggest that increasing stocking density is associated with significantly negative biological, microbial, and physiological effects on white-leg shrimp under the BF system.
Collapse
Affiliation(s)
- Mohamed Mohamed Said
- Department of Aquaculture, Faculty of Fish Resources, Suez University, Suez, 43221, Egypt
| | - Haitham G Abo-Al-Ela
- Genetics and Biotechnology, Department of Aquaculture, Faculty of Fish Resources, Suez University, Suez, 43221, Egypt.
| | - Yasmine A El-Barbary
- Department of Fish Health and Diseases, Faculty of Fish Resources, Suez University, Suez, 43221, Egypt
| | - Omaima M Ahmed
- Department of Fish Processing and Technology, Faculty of Fish Resources, Suez University, Suez, 43221, Egypt
| | - Hagar Sedeek Dighiesh
- Department of Aquaculture, Faculty of Fish Resources, Suez University, Suez, 43221, Egypt
| |
Collapse
|
4
|
Pillai K, Akhter J, Mekkawy AH, Valle SJ, Morris DL. Development and Validation of Micro-Azocasein Assay for Quantifying Bromelain. Methods Protoc 2024; 7:25. [PMID: 38525783 PMCID: PMC10961761 DOI: 10.3390/mps7020025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 03/08/2024] [Accepted: 03/08/2024] [Indexed: 03/26/2024] Open
Abstract
The proteolytic activity of enzymes may be evaluated by a colorimetric method with azocasein. Hence, we developed a micro-assay to quantify bromelain using azocasein. A total of 250 µL of 1.0% azocasein in dH2O was added to 250 µL of test solution, vortexed and incubated at ambient room temperature/30 min. The reaction was terminated with 1500 µL of 5% trichloroacetic acid, vortexed and centrifuged. A total of 150 µL of 0.5M NaOH was added to 150 µL of supernatant in triplicates, and absorbance was recorded at 410 nm. The linearity of the calibration curve was tested with 200-800 µg/mL serial dilutions. The detection limit, precision, accuracy, and robustness were tested along with the substrate enzyme reaction time and solvent matrix effect. Good linearity was seen with serially diluted 200 µg/mL bromelain. The limit of quantification and limit of detection were 5.412 and 16.4 µg/mL, respectively. Intra-day and inter-day analyses showed a relative standard deviation below 2.0%. The assay was robust when tested over 400-450 nm wavelengths. The assays performed using dH2O or PBS diluents indicated a higher sensitivity in dH2O. The proteolytic activity of bromelain was enhanced with L-cysteine or N-acetylcysteine. Hence, this micro-azocasein assay is reliable for quantifying bromelain.
Collapse
Affiliation(s)
- Krishna Pillai
- Mucpharm Pty Ltd., Sydney, NSW 2217, Australia; (K.P.); (J.A.); (A.H.M.); (S.J.V.)
- Department of Surgery, St. George Hospital, Sydney, NSW 2217, Australia
| | - Javed Akhter
- Mucpharm Pty Ltd., Sydney, NSW 2217, Australia; (K.P.); (J.A.); (A.H.M.); (S.J.V.)
- Department of Surgery, St. George Hospital, Sydney, NSW 2217, Australia
| | - Ahmed H. Mekkawy
- Mucpharm Pty Ltd., Sydney, NSW 2217, Australia; (K.P.); (J.A.); (A.H.M.); (S.J.V.)
- Department of Surgery, St. George Hospital, Sydney, NSW 2217, Australia
- St. George & Sutherland Clinical School, University of New South Wales, Sydney, NSW 2217, Australia
| | - Sarah J. Valle
- Mucpharm Pty Ltd., Sydney, NSW 2217, Australia; (K.P.); (J.A.); (A.H.M.); (S.J.V.)
- Department of Surgery, St. George Hospital, Sydney, NSW 2217, Australia
- Intensive Care Unit, St. George Hospital, Sydney, NSW 2217, Australia
| | - David L. Morris
- Mucpharm Pty Ltd., Sydney, NSW 2217, Australia; (K.P.); (J.A.); (A.H.M.); (S.J.V.)
- Department of Surgery, St. George Hospital, Sydney, NSW 2217, Australia
- St. George & Sutherland Clinical School, University of New South Wales, Sydney, NSW 2217, Australia
| |
Collapse
|
5
|
Filippova TA, Masamrekh RA, Shumyantseva VV, Latsis IA, Farafonova TE, Ilina IY, Kanashenko SL, Moshkovskii SA, Kuzikov AV. Electrochemical biosensor for trypsin activity assay based on cleavage of immobilized tyrosine-containing peptide. Talanta 2023; 257:124341. [PMID: 36821964 DOI: 10.1016/j.talanta.2023.124341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/13/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023]
Abstract
In this work, we proposed a biosensor for trypsin proteolytic activity assay using immobilization of model peptides on screen-printed electrodes (SPE) modified with gold nanoparticles (AuNPs) prepared by electrosynthetic method. Sensing of proteolytic activity was based on electrochemical oxidation of tyrosine residues of peptides. We designed peptides containing N-terminal cysteine residue for immobilization on an SPE, modified with gold nanoparticles, trypsin-specific cleavage site and tyrosine residue as a redox label. The peptides were immobilized on SPE by formation of chemical bonds between mercapto groups of the N-terminal cysteine residues and AuNPs. After the incubation with trypsin, time-dependent cleavage of the immobilized peptides was observed by decline in tyrosine electrochemical oxidation signal. The kinetic parameters of trypsin, such as the catalytic constant (kcat), the Michaelis constant (KM) and the catalytic efficiency (kcat/KM), toward the CGGGRYR peptide were determined as 0.33 ± 0.01 min-1, 198 ± 24 nM and 0.0016 min-1 nM-1, respectively. Using the developed biosensor, we demonstrated the possibility of analysis of trypsin specificity toward the peptides with amino acid residues disrupting proteolysis. Further, we designed the peptides with proline or glutamic acid residues after the cleavage site (CGGRPYR and CGGREYR), and trypsin had reduced activity toward both of them according to the existing knowledge of the enzyme specificity. The developed biosensor system allows one to perform a comparative analysis of the protease steady-state kinetic parameters and specificity toward model peptides with different amino acid sequences.
Collapse
Affiliation(s)
- Tatiana A Filippova
- Pirogov Russian National Research Medical University, 1 Ostrovityanova st., Moscow 117997, Russia; Institute of Biomedical Chemistry, 10, Pogodinskaya st., Moscow, 119121, Russia
| | - Rami A Masamrekh
- Pirogov Russian National Research Medical University, 1 Ostrovityanova st., Moscow 117997, Russia; Institute of Biomedical Chemistry, 10, Pogodinskaya st., Moscow, 119121, Russia
| | - Victoria V Shumyantseva
- Pirogov Russian National Research Medical University, 1 Ostrovityanova st., Moscow 117997, Russia; Institute of Biomedical Chemistry, 10, Pogodinskaya st., Moscow, 119121, Russia
| | - Ivan A Latsis
- Federal Research and Clinical Center of Physical-Chemical Medicine, 1a Malaya Pirogovskaya st., Moscow, 119435, Russia
| | | | - Irina Y Ilina
- Federal Research and Clinical Center of Physical-Chemical Medicine, 1a Malaya Pirogovskaya st., Moscow, 119435, Russia
| | - Sergey L Kanashenko
- Institute of Biomedical Chemistry, 10, Pogodinskaya st., Moscow, 119121, Russia
| | - Sergei A Moshkovskii
- Pirogov Russian National Research Medical University, 1 Ostrovityanova st., Moscow 117997, Russia; Federal Research and Clinical Center of Physical-Chemical Medicine, 1a Malaya Pirogovskaya st., Moscow, 119435, Russia.
| | - Alexey V Kuzikov
- Pirogov Russian National Research Medical University, 1 Ostrovityanova st., Moscow 117997, Russia; Institute of Biomedical Chemistry, 10, Pogodinskaya st., Moscow, 119121, Russia.
| |
Collapse
|
6
|
Matinfar A, Dezfulian M, Haghighipour N, Kurdtabar M, Pourbabaei AA. Replacement of Trypsin by Proteases for Medical Applications. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2022; 21:e126328. [PMID: 36942066 PMCID: PMC10024315 DOI: 10.5812/ijpr-126328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/17/2022] [Accepted: 07/11/2022] [Indexed: 11/07/2022]
Abstract
Background Cell culture has a crucial role in many applications in biotechnology. The production of vaccines, recombinant proteins, tissue engineering, and stem cell therapy all need cell culture. Most of these activities needed adherent cells to move, which should be trypsinized several times until received on a large scale. Although trypsin is manufactured from the bovine or porcine pancreas, the problem of contamination by unwanted animal proteins, unwanted immune reactions, or contamination to pathogen reagents is the main problem. Objectives This study investigated microbial proteases as a safe alternative for trypsin replacement in cell culture experiments for the detachment of adherent cells. Methods The bacteria were isolated from the leather industry effluent based on their protease enzymes. After sequencing their 16S ribosomal deoxyribonucleic acid, their protease enzymes were purified, and their enzyme activities were assayed. The alteration of enzymatic activities using different substrates and the effect of substrate concentrations on enzyme activities were determined. The purified proteases were evaluated for cell detachment in the L929 fibroblast cells compared to trypsin. The separated cells were cultured again, and cell proliferation was determined by the MTT assay. Results The results showed that the isolated bacteria were Bacillus pumilus, Stenotrophomonas sp., Klebsiella aerogenes, Stenotrophomonas maltophilia, and Bacillus licheniformis. Among the isolated bacteria, the highest and the lowest protease activity belonged to Stenotrophomonas sp. and K. aerogenes, with 60.34 and 11.09 U/mL protease activity, respectively. All the isolated microbial proteases successfully affected L929 fibroblast cells' surface proteins and detached the cells. A significant induction in cell proliferation was observed in the cells treated with K. aerogenes protease and B. pumilus protease, respectively (P < 0.05). Conclusions The obtained results suggested that microbial proteases can be used as safe and efficient alternatives to trypsin in cell culture in biopharmaceutical applications.
Collapse
Affiliation(s)
- Alireza Matinfar
- Department of Microbiology, Karaj Branch, Islamic Azad University, Karaj, Iran
| | - Mehrouz Dezfulian
- Biotechnology Research Center, Karaj Branch, Islamic Azad University, Karaj, Iran
- Corresponding Author: Biotechnology Research Center, Karaj Branch, Islamic Azad University, Karaj, Iran.
| | | | - Mehran Kurdtabar
- Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
| | - Ahmad Ali Pourbabaei
- Department of Soil Science, University College of Agriculture and Natural Resources, University of Tehran, Tehran, Iran
| |
Collapse
|
7
|
The potential of novel bacterial isolates from healthy ginseng for the control of ginseng root rot disease (Fusarium oxysporum). PLoS One 2022; 17:e0277191. [DOI: 10.1371/journal.pone.0277191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 10/21/2022] [Indexed: 11/12/2022] Open
Abstract
Ginseng root rot caused by Fusarium oxysporum is serious disease that impacts ginseng production. In the present study, 145 strains of bacteria were isolated from the rhizosphere soil of healthy ginseng plants. Three strains with inhibitory activity against Fusarium oxysporum (accession number AF077393) were identified using the dual culture tests and designated as YN-42(L), YN-43(L), and YN-59(L). Morphological, physiological, biochemical, 16S rRNA gene sequencing and phylogenetic analyses were used to identify the strains as Bacillus subtilis [YN-42(L)] (accession number ON545980), Delftia acidovorans [YN-43(L)] (accession number ON545981), and Bacillus polymyxae [YN-59(L)] (accession number ON545982). All three isolates effectively inhibited the growth of Fusarium oxysporum in vitro and the antagonistic mechanism used by the three strains involved the secretion of multiple bioactive metabolites responsible for the hydrolysis of the fungal cell wall. All three biocontrol bacteria produce indoleacetic acid, which has a beneficial effect on plant growth. From our findings, all three antagonistic strains can be excellent candidates for ginseng root rot caused by the pathogenic fungus Fusarium oxysporum. These bacteria have laid the foundation for the biological control of ginseng root rot and for further research on the field control of ginseng pathogens.
Collapse
|
8
|
Khayyat AN, Abbas HA, Khayat MT, Shaldam MA, Askoura M, Asfour HZ, Khafagy ES, Abu Lila AS, Allam AN, Hegazy WAH. Secnidazole Is a Promising Imidazole Mitigator of Serratia marcescens Virulence. Microorganisms 2021; 9:microorganisms9112333. [PMID: 34835458 PMCID: PMC8617784 DOI: 10.3390/microorganisms9112333] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/05/2021] [Accepted: 11/07/2021] [Indexed: 02/06/2023] Open
Abstract
Serratia marcescens is an opportunistic pathogen that causes diverse nosocomial infections. S. marcescens has developed considerable resistance to different antibiotics and is equipped with an armory of virulence factors. These virulence factors are regulated in S. marcescens by an intercellular communication system termed quorum sensing (QS). Targeting bacterial virulence and QS is an interesting approach to mitigating bacterial pathogenesis and overcoming the development of resistance to antimicrobials. In this study, we aimed to evaluate the anti-virulence activities of secnidazole on a clinical isolate of S. marcescens. The effects of secnidazole at sub-inhibitory concentrations (sub-MICs) on virulence factors, swarming motility, biofilm formation, proteases, hemolysin activity, and prodigiosin production were evaluated in vitro. Secnidazole's protective activity against S. marcescens pathogenesis was assessed in vivo in mice. Furthermore, a molecular docking study was conducted to evaluate the binding ability of secnidazole to the S. marcescens SmaR QS receptor. Our findings showed that secnidazole at sub-MICs significantly reduced S. marcescens virulence factor production in vitro and diminished its pathogenesis in mice. The insilico docking study revealed a great ability of secnidazole to competitively hinder the binding of the autoinducer to the SmaR QS receptor. In conclusion, secnidazole is a promising anti-virulence agent that may be used to control infections caused by S. marcescens.
Collapse
Affiliation(s)
- Ahdab N. Khayyat
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.N.K.); (M.T.K.)
| | - Hisham A. Abbas
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; (H.A.A.); (M.A.)
| | - Maan T. Khayat
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.N.K.); (M.T.K.)
| | - Moataz A. Shaldam
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafr El-Sheikh 33511, Egypt;
| | - Momen Askoura
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; (H.A.A.); (M.A.)
| | - Hani Z. Asfour
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - El-Sayed Khafagy
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-kharj 11942, Saudi Arabia;
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University, Ismailia 41552, Egypt
| | - Amr S. Abu Lila
- Department of Pharmaceutics, College of Pharmacy, University of Hail, Hail 81442, Saudi Arabia;
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Ahmed N. Allam
- Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt;
| | - Wael A. H. Hegazy
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; (H.A.A.); (M.A.)
- Correspondence: ; Tel.: +20-110-118-8800
| |
Collapse
|
9
|
Not Only Antimicrobial: Metronidazole Mitigates the Virulence of Proteus mirabilis Isolated from Macerated Diabetic Foot Ulcer. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11156847] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Diabetic foot ulcers are recognized to be a severe complication of diabetes, increasing the risk of amputation and death. The bacterial infection of Diabetic foot ulcers with virulent and resistant bacteria as Proteus mirabilis greatly worsens the wound and may not be treated with conventional therapeutics. Developing new approaches to target bacterial virulence can be helpful to conquer such infections. In the current work, we evaluated the anti-virulence activities of the widely used antibacterial metronidazole. The minimum inhibitory concentrations (MIC) and minimum biofilm eradication concentrations (MEBC) were determined for selected antibiotics which P. mirabilis was resistant to them in the presence and absence of metronidazole in sub-MIC. The effect of metronidazole in sub-MIC on P. mirabilis virulence factors as production of exoenzymes, motilities, adhesion and biofilm formation, were evaluated. Furthermore, molecular docking of metronidazole into P. mirabilis adhesion and essential quorum sensing (QS) proteins, was performed. The results revealed a significant ability of metronidazole to in-vitro inhibit P. mirabilis virulence factors and antagonize its essential proteins. Moreover, metronidazole markedly decreased the MICs and MBECs of tested antibiotics. Conclusively, metronidazole in sub-MIC is a plausible anti-virulence and anti-QS agent that can be combined to other antibiotics as anti-virulence adjuvant to defeat aggressive infections.
Collapse
|
10
|
Balakrishnan V, Thangaraj K, Palani M, Vaiyapuri M. Green synthesis of copper oxide nanoparticles using Euphorbia hirta leaves extract and its biological applications. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1952260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Kalaiyarasu Thangaraj
- Department of Microbiology and Biotechnology, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - Mariyappan Palani
- Department of Biochemistry, Periyar University, Salem, Tamil Nadu, India
| | - Manju Vaiyapuri
- Department of Biochemistry, Periyar University, Salem, Tamil Nadu, India
| |
Collapse
|