1
|
Marena GD, Nascimento ALCSD, Carvalho GC, Sábio RM, Bauab TM, Chorilli M. Amphotericin B and micafungin duo-loaded nanoemulsion as a potential strategy against Candida auris biofilms. BIOFOULING 2024:1-15. [PMID: 39245976 DOI: 10.1080/08927014.2024.2396020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 08/16/2024] [Accepted: 08/19/2024] [Indexed: 09/10/2024]
Abstract
Candida auris is a multidrug-resistant yeast that has seen a worrying increase during the COVID-19 pandemic. Give7/n this, new therapeutic options, such as controlled-release nanomaterials, may be promising in combating the infection. Therefore, this study aimed to develop amphotericin B (AmB) and micafungin (MICA)-loaded nanoemulsions (NEMA) and evaluated against biofilms of C. auris. Nanoemulsions (NEs) were characterized and determined minimum inhibitory concentration MIC90, checkerboard and anti-biofilm. NEMA presented a size of 53.7 and 81.4 nm for DLS and NTA, respectively, with good stability and spherical morphology. MICAmB incorporated efficiency was 88.4 and 99.3%, respectively. The release results show that AmB and MICA obtained a release of 100 and 63.4%, respectively. MICAmB and NEMA showed MIC90 values of 0.015 and 0.031 ug/mL, respectively and synergism. NEMA showed greater metabolic inhibition and morphological changes in mature biofilms. This drugs combination and co-encapsulation proved to be a promising therapy against C. auris biofilms.
Collapse
Affiliation(s)
- Gabriel Davi Marena
- Department of Biological Sciences, São Paulo State University (UNESP), School of Pharmaceutical Sciences, São Paulo State, Brazil
- Department of Drug and Medicines, São Paulo State University (UNESP), School of Pharmaceutical Sciences, São Paulo State, Brazil
| | | | - Gabriela Corrêa Carvalho
- Department of Biological Sciences, São Paulo State University (UNESP), School of Pharmaceutical Sciences, São Paulo State, Brazil
- Department of Drug and Medicines, São Paulo State University (UNESP), School of Pharmaceutical Sciences, São Paulo State, Brazil
| | - Rafael Miguel Sábio
- Department of Drug and Medicines, São Paulo State University (UNESP), School of Pharmaceutical Sciences, São Paulo State, Brazil
| | - Tais Maria Bauab
- Department of Biological Sciences, São Paulo State University (UNESP), School of Pharmaceutical Sciences, São Paulo State, Brazil
| | - Marlus Chorilli
- Department of Drug and Medicines, São Paulo State University (UNESP), School of Pharmaceutical Sciences, São Paulo State, Brazil
| |
Collapse
|
2
|
Singh S, Singh S, Trivedi M, Dwivedi M. An insight into MDR Acinetobacter baumannii infection and its pathogenesis: Potential therapeutic targets and challenges. Microb Pathog 2024; 192:106674. [PMID: 38714263 DOI: 10.1016/j.micpath.2024.106674] [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: 10/19/2023] [Revised: 04/22/2024] [Accepted: 05/01/2024] [Indexed: 05/09/2024]
Abstract
Acinetobacter baumannii is observed as a common species of Gram-negative bacteria that exist in soil and water. Despite being accepted as a typical component of human skin flora, it has become an important opportunistic pathogen, especially in healthcare settings. The pathogenicity of A. baumannii is attributed to its virulence factors, which include adhesins, pili, lipopolysaccharides, outer membrane proteins, iron uptake systems, autotransporter, secretion systems, phospholipases etc. These elements provide the bacterium the ability to cling to and penetrate host cells, get past the host immune system, and destroy tissue. Its infection is a major contributor to human pathophysiological conditions including pneumonia, bloodstream infections, urinary tract infections, and surgical site infections. It is challenging to treat infections brought on by this pathogen since this bacterium has evolved to withstand numerous drugs and further emergence of drug-resistant A. baumannii results in higher rates of morbidity and mortality. The long-term survival of this bacterium on surfaces of medical supplies and hospital furniture facilitates its frequent spread in humans from one habitat to another. There is a need for urgent investigations to find effective drug targets for A. baumannii as well as designing novel drugs to reduce the survival and spread of infection. In the current review, we represent the specific features, pathogenesis, and molecular intricacies of crucial drug targets of A. baumannii. This would also assist in proposing strategies and alternative therapies for the prevention and treatment of A. baumannii infections and their spread.
Collapse
Affiliation(s)
- Sukriti Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India
| | - Sushmita Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India
| | - Mala Trivedi
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India
| | - Manish Dwivedi
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow, 226028, India; Research Cell, Amity University Uttar Pradesh, Lucknow, 226028, India.
| |
Collapse
|
3
|
Marena GD, López A, Carvalho GC, Marín MDP, Pérez Ruiz MD, Pérez-Royo JM, Tormo-Mas MÁ, Bernabé P, Valentín E, Bauab TM, Chorilli M, Pemán J, Ruiz-Gaitán A. Sunflower Oil and Cholesterol Nanoemulsion: A Novel Carrier for Micafungin to Combat Multi-Resistant Candida auris. Pathogens 2024; 13:549. [PMID: 39057777 PMCID: PMC11279427 DOI: 10.3390/pathogens13070549] [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: 05/22/2024] [Revised: 06/24/2024] [Accepted: 06/26/2024] [Indexed: 07/28/2024] Open
Abstract
Candida auris is an emerging, multidrug-resistant yeast that causes systemic infections, mainly in hospitalized or immunosuppressed patients. This pathogen has a high mortality and morbidity rate. This study aims to evaluate the antifungal potential of micafungin (MICA) encapsulated in a nanoemulsion (NEM) against four clades of C. auris and other non-C. auris species. The antifungal potential of MICA and NEM was evaluated by determining mature biofilm inhibition (0.78-50 µg/mL). The antifungal activities of MICA and NEM (5.92 mg/Kg) were evaluated using an in vivo model of Galleria mellonella. The results showed that NEM intensified the antibiofilm action of MICA, especially in 48 h mature biofilms. In vivo results displayed a higher effectiveness of NEM against all clades of C. auris tested, inhibiting the fungal load in the hemolymph and tissues of G. mellonella with a difference of 3 log10. In addition, C. auris infection caused granulomas surrounded by hemocytes, mainly at the lower and upper ends. Conversely, C. albicans developed pseudohyphae, biofilms, filaments, and chlamydospores. In conclusion, encapsulation of MICA in a nanoemulsion enhances its antifungal activity against mature biofilms of C. auris. This strategy may be considered a therapeutic approach for the control of infections and the dissemination of this new global health threat.
Collapse
Affiliation(s)
- Gabriel Davi Marena
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, SP, Brazil; (G.C.C.); (M.C.)
- Department of Biological Sciences, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, SP, Brazil;
| | - Alejandro López
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
| | - Gabriela Corrêa Carvalho
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, SP, Brazil; (G.C.C.); (M.C.)
- Department of Biological Sciences, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, SP, Brazil;
| | | | | | - Jose Manuel Pérez-Royo
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
| | - María Ángeles Tormo-Mas
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
| | - Patricia Bernabé
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
| | - Eulogio Valentín
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
- Department of Microbiology and Ecology, University of Valencia, 46010 Valencia, Spain
| | - Taís Maria Bauab
- Department of Biological Sciences, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, SP, Brazil;
| | - Marlus Chorilli
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, SP, Brazil; (G.C.C.); (M.C.)
| | - Javier Pemán
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
- Department of Medical Microbiology, University and Polytechnic La Fe Hospital, 46026 Valencia, Spain
| | - Alba Ruiz-Gaitán
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (G.D.M.); (A.L.); (J.M.P.-R.); (E.V.)
- Department of Medical Microbiology, University and Polytechnic La Fe Hospital, 46026 Valencia, Spain
| |
Collapse
|
4
|
Li B, Mao J, Wu J, Mao K, Jia Y, Chen F, Liu J. Nano-Bio Interactions: Biofilm-Targeted Antibacterial Nanomaterials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306135. [PMID: 37803439 DOI: 10.1002/smll.202306135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/10/2023] [Indexed: 10/08/2023]
Abstract
Biofilm is a spatially organized community formed by the accumulation of both microorganisms and their secretions, leading to persistent and chronic infections because of high resistance toward conventional antibiotics. In view of the tunable physicochemical properties and the related unique biological behavior (e.g., size-, shape-, and surface charge-dependent penetration, protein corona endowed targeting, catalytic- and electronic-related oxidative stress, optical- and magnetic-associated hyperthermia, etc.), nanomaterials-based therapeutics are widely used for the treatment of biofilm-associated infections. In this review, the biological characteristics of biofilm are introduced. And the nanomaterials-based antibacterial strategies are further discussed via biofilm targeting, including preventing biofilm formation, enhancing biofilm penetration, disrupting the mature biofilm, and acting as drug delivery systems. In which, the interactions between biofilm and nanomaterials include mechanical disruption, electron transfer, enzymatic degradation, oxidative stress, and hyperthermia. Additionally, the current advances of nanomaterials for antibacterial nanomaterials by biofilm targeting are summarized. This review aims to present a complete vision of antibacterial nanomaterials-biofilm (nano-bio) interactions, paving the way for the future development and clinical translation of effective antibacterial nanomedicines.
Collapse
Affiliation(s)
- Bo Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Faculty of Life Science and Medicine, Northwest University, Xi'an, 710069, P. R. China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Jiahui Mao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Faculty of Life Science and Medicine, Northwest University, Xi'an, 710069, P. R. China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Jiawei Wu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Faculty of Life Science and Medicine, Northwest University, Xi'an, 710069, P. R. China
| | - Kerou Mao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Faculty of Life Science and Medicine, Northwest University, Xi'an, 710069, P. R. China
| | - Yangrui Jia
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Faculty of Life Science and Medicine, Northwest University, Xi'an, 710069, P. R. China
| | - Fulin Chen
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Faculty of Life Science and Medicine, Northwest University, Xi'an, 710069, P. R. China
| | - Jing Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| |
Collapse
|
5
|
Maleki AR, Tabatabaei RR, Aminian F, Ranjbar S, Ashrafi F, Ranjbar R. Antibacterial and antibiofilm effects of green synthesized selenium nanoparticles on clinical Klebsiella pneumoniae isolates. J Basic Microbiol 2023; 63:1373-1382. [PMID: 37699755 DOI: 10.1002/jobm.202300332] [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: 06/12/2023] [Revised: 08/24/2023] [Accepted: 09/03/2023] [Indexed: 09/14/2023]
Abstract
Nanotechnology covers many disciplines, including the biological sciences. In this study, selenium nanoparticles (Se-NPs) were synthesized using Artemisia annua extract and investigated against clinical strains of klebsiella pneumoniae (K. pneumoniae) for their anti-biofilm effects. In this experimental study, from May 1998 to September 1998, 50 clinical samples of blood, urine, and sputum were collected, and K. pneumoniae strains were isolated using microbiological methods. Subsequently, the antibacterial effects of Se-NPs at concentrations of 12-25-50-100/5-6/3-25/125 μg/mL were studied. Finally, biofilm-producing strains were isolated, and the expression of mrkA biofilm gene was studied in real-time strains treated with Se-NPs using real-time polymerase chain reaction (PCR). Out of 50 clinical samples, 20 strains of K. pneumoniae were isolated. Minimum inhibitory concentration (MIC) results of Se-NPs showed that Se-NPs were capable of significant cell killing. Real-time PCR results also showed that mrkA gene expression was significantly reduced in strains treated with Se-NPs. According to this study, Se-NPs could reduce bacterial growth and biofilm formation, therefore, could be considered a candidate drug in the medical application for infections caused by K. pneumoniae.
Collapse
Affiliation(s)
- Ali Reza Maleki
- Depatment of Microbiology, School of Biological Sciences, Islamic Azad University, North Tehran Branch, Tehran, Iran
| | - Robab Rafiei Tabatabaei
- Depatment of Microbiology, School of Biological Sciences, Islamic Azad University, North Tehran Branch, Tehran, Iran
| | - Fatemeh Aminian
- Department of Molecular Cell Biology and Genetics, Bushehr Branch, Islamic Azad University, Bushehr, Iran
| | - Sina Ranjbar
- Department of Microbiology, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
| | - Fatemeh Ashrafi
- Depatment of Microbiology, School of Biological Sciences, Islamic Azad University, North Tehran Branch, Tehran, Iran
| | - Reza Ranjbar
- Molecular Biology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| |
Collapse
|
6
|
Natsheh IY, Elkhader MT, Al-Bakheit AA, Alsaleh MM, El-Eswed BI, Hosein NF, Albadawi DK. Inhibition of Acinetobacter baumannii Biofilm Formation Using Different Treatments of Silica Nanoparticles. Antibiotics (Basel) 2023; 12:1365. [PMID: 37760662 PMCID: PMC10525453 DOI: 10.3390/antibiotics12091365] [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: 06/30/2023] [Revised: 08/17/2023] [Accepted: 08/19/2023] [Indexed: 09/29/2023] Open
Abstract
There exists a multitude of pathogens that pose a threat to human and public healthcare, collectively referred to as ESKAPE pathogens. These pathogens are capable of producing biofilm, which proves to be quite resistant to elimination. Strains of A. baumannii, identified by the "A" in the acronym ESKAPE, exhibit significant resistance to amoxicillin in vivo due to their ability to form biofilm. This study aims to inhibit bacterial biofilm formation, evaluate novel silica nanoparticles' effectiveness in inhibiting biofilm, and compare their effectiveness. Amoxicillin was utilized as a positive control, with a concentration exceeding twice that when combined with silica NPs. Treatments included pure silica NPs, silica NPs modified with copper oxide (CuO.SiO2), sodium hydroxide (NaOH.SiO2), and phosphoric acid (H3PO4.SiO2). The characterization of NPs was conducted using scanning electron microscopy (SEM), while safety testing against normal fibroblast cells was employed by MTT assay. The microtiter plate biofilm formation assay was utilized to construct biofilm, with evaluations conducted using three broth media types: brain heart infusion (BHI) with 2% glucose and 2% sucrose, Loria broth (LB) with and without glucose and sucrose, and Dulbecco's modified eagle medium/nutrient (DMEN/M). Concentrations ranging from 1.0 mg/mL to 0.06 µg/mL were tested using a microdilution assay. Results from SEM showed that pure silica NPs were mesoporous, but in the amorphous shape of the CuO and NaOH treatments, these pores were disrupted, while H3PO4 was composed of sheets. Silica NPs were able to target Acinetobacter biofilms without harming normal cells, with viability rates ranging from 61-73%. The best biofilm formation was achieved using a BHI medium with sugar supplementation, with an absorbance value of 0.35. Biofilms treated with 5.0 mg/mL of amoxicillin as a positive control alongside 1.0 mg/mL of each of the four silica treatments in isolation, resulting in the inhibition of absorbance values of 0.04, 0.13, 0.07, 0.09, and 0.08, for SiO2, CuO.SiO2, NaOH.SiO2 and H3PO4.SiO2, respectively. When amoxicillin was combined, inhibition increased from 0.3 to 0.04; NaOH with amoxicillin resulted in the lowest minimum biofilm inhibitory concentration (MBIC), 0.25 µg/mL, compared to all treatments and amoxicillin, whereas pure silica and composite had the highest MBIC, even when combined with amoxicillin, compared to all treatments, but performed better than that of the amoxicillin alone which gave the MBIC at 625 µg/mL. The absorbance values of MBIC of each treatment showed no significant differences in relation to amoxicillin absorbance value and relation to each other. Our study showed that smaller amoxicillin doses combined with the novel silica nanoparticles may reduce toxic side effects and inhibit biofilm formation, making them viable alternatives to high-concentration dosages. Further investigation is needed to evaluate in vivo activity.
Collapse
Affiliation(s)
- Iyad Y. Natsheh
- Department of Medical Applied Sciences, Zarqa University College, Al-Balqa Applied University, Salt 19117, Jordan; (I.Y.N.); (M.T.E.); (N.F.H.); (D.K.A.)
| | - Mallak T. Elkhader
- Department of Medical Applied Sciences, Zarqa University College, Al-Balqa Applied University, Salt 19117, Jordan; (I.Y.N.); (M.T.E.); (N.F.H.); (D.K.A.)
| | - Ala’a A. Al-Bakheit
- Department of Nutrition and Food Processing, Faculty of Agricultural Technology, Al-Balqa Applied University, Salt 19117, Jordan;
| | - Majd M. Alsaleh
- Department of Medical Applied Sciences, Zarqa University College, Al-Balqa Applied University, Salt 19117, Jordan; (I.Y.N.); (M.T.E.); (N.F.H.); (D.K.A.)
- Department of Biology, School of Science, University of Jordan, Amman 11942, Jordan
| | - Bassam I. El-Eswed
- Department of Basic Science, Zarqa University College, Al-Balqa Applied University, Salt 19117, Jordan;
| | - Nedaa F. Hosein
- Department of Medical Applied Sciences, Zarqa University College, Al-Balqa Applied University, Salt 19117, Jordan; (I.Y.N.); (M.T.E.); (N.F.H.); (D.K.A.)
| | - Duaa K. Albadawi
- Department of Medical Applied Sciences, Zarqa University College, Al-Balqa Applied University, Salt 19117, Jordan; (I.Y.N.); (M.T.E.); (N.F.H.); (D.K.A.)
| |
Collapse
|
7
|
Marena GD, Ruiz-Gaitán A, Garcia-Bustos V, Tormo-Mas MÁ, Pérez-Royo JM, López A, Bernarbe P, Pérez Ruiz MD, Zaragoza Macian L, Vicente Saez C, Avalos Mansilla A, Gómez EV, Carvalho GC, Bauab TM, Chorilli M, Pemán J. Nanoemulsion Increases the Antifungal Activity of Amphotericin B against Four Candida auris Clades: In Vitro and In Vivo Assays. Microorganisms 2023; 11:1626. [PMID: 37512799 PMCID: PMC10386465 DOI: 10.3390/microorganisms11071626] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/05/2023] [Accepted: 06/17/2023] [Indexed: 07/30/2023] Open
Abstract
Candida auris is an emerging yeast of worldwide interest due to its antifungal resistance and mortality rates. The aim of this study was to analyse the in vitro and in vivo antifungal activity of a nanoemulsion loaded with amphotericin B (NEA) against planktonic cells and biofilm of C. auris clinical isolates belonging to four different clades. In vivo assays were performed using the Galleria mellonella model to analyse antifungal activity and histopathological changes. The in vitro results showed that NEA exhibited better antifungal activity than free amphotericin B (AmB) in both planktonic and sessile cells, with >31% inhibition of mature biofilm. In the in vivo assays, NEA demonstrated superior antifungal activity in both haemolymph and tissue. NEA reduced the fungal load in the haemolymph more rapidly and with more activity in the first 24 h after infection. The histological analysis of infected larvae revealed clusters of yeast, immune cells, melanisation, and granulomas. In conclusion, NEA significantly improved the in vitro and in vivo antifungal activity of AmB and could be considered a promising therapy for C. auris infections.
Collapse
Affiliation(s)
- Gabriel Davi Marena
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil
- Department of Biological Sciences, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil
| | - Alba Ruiz-Gaitán
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain
- Department of Medical Microbiology, University and Polytechnic La Fe Hospital, 46026 Valencia, Spain
| | - Victor Garcia-Bustos
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain
| | | | | | - Alejandro López
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain
| | - Patricia Bernarbe
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain
| | | | | | | | | | - Eulogio Valentín Gómez
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain
- Department of Microbiology and Ecology, University of Valencia, 46010 Valencia, Spain
| | - Gabriela Corrêa Carvalho
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil
- Department of Biological Sciences, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil
| | - Tais Maria Bauab
- Department of Biological Sciences, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil
| | - Marlus Chorilli
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, Brazil
| | - Javier Pemán
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain
- Department of Medical Microbiology, University and Polytechnic La Fe Hospital, 46026 Valencia, Spain
| |
Collapse
|
8
|
Marena GD, Ramos MADS, Carvalho GC, de Lima LC, Nascimento ALCSD, Sábio RM, Rodero CF, Spósito L, Bauab TM, Chorilli M. Development and characterization of an amphotericin B - loaded nanoemulsion applied to Candida auris biofilms control. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
9
|
Rezania N, Rahmati P, Noorbakhsh F, Farhadyar N, Lotfali E. Investigation the effects of silver nanoparticles and gold nanoparticles on expression of bap and csu genes in biofilm formation of Acinetobacter baumannii. IRANIAN JOURNAL OF MICROBIOLOGY 2022; 14:510-517. [PMID: 36721500 PMCID: PMC9867630 DOI: 10.18502/ijm.v14i4.10237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Background and Objectives Acinetobacter baumannii is one of the main pathogens of the hospital and causes various infections. csu A/BABCDE involved in the initial surface attachment during biofilm formation and bap gene produces specific proteins at the cell surface that play a direct role in formation of biofilm and the infectivity of this bacterium. The aim of this study was to investigate the effect of silver nanoparticles and gold nanoparticles on the expression of bap and csu genes in the Acinetobacter baumannii biofilm formation. Materials and Methods The susceptibility test was performed to determine the MIC of silver nanoparticles, gold nanoparticles and gold-vancomycin nanoparticles performed by broth dilution method on A. baumannii strains. The ability of biofilms formation in strains treated by MIC of silver nanoparticles and gold-vancomycin nanoparticles were evaluated by microtiter plate method and A. baumannii ATCC19606 used as control. Expression of the csu and bap genes were determinded by measuring the cognate mRNA level by real-time PCR. Results In present study, gold nanoparticles could not prevent the growth and biofilm formation of A. baumannii strains. The MIC concentration of silver nanoparticles and vancomycin- gold nanoparticles were 6.25 μg/ml and 0.625 μg/ml respectively and MBC concenteration of nanoparticles for 70% of strain was 12.5 μg/ml and 1.25 μg/ml respectively. Real-time PCR and data analysis, determined that the expression of bap, csuC and csuE genes in A. baumannii strains treated with MIC concentration (6.25 μg/ml) of silver nanoparticles decreased compared to control groups. Also, the expression of csuC and csuE genes in strains treated with MIC concentration (0.625 μg/ml) of vancomycin -gold nanoparticles increased, however the expression of bap was decreased compared to the control groups. Conclusion Due to the inhibitory effect of silver nanoparticles and gold-vancomycin nanoparticles against A. baumannii biofilm formation and genes expression, they can probably be used for prevent of biofilm formation in medical instrument or can be use for treatment of infections with or without antibiotic.
Collapse
Affiliation(s)
- Niloofar Rezania
- Department of Microbiolgy, Biological Science Collage, Islamic Azad University of Varamin, Pishva Branch, Varamin, Pishva, Iran
| | - Parisa Rahmati
- Department of Microbiolgy, Biological Science Collage, Islamic Azad University of Varamin, Pishva Branch, Varamin, Pishva, Iran
| | - Fatemeh Noorbakhsh
- Department of Microbiolgy, Biological Science Collage, Islamic Azad University of Varamin, Pishva Branch, Varamin, Pishva, Iran,Corresponding author: Fatemeh Noorbakhsh, Ph.D, Department of Microbiolgy, Biological Science Collage, Islamic Azad University of Varamin, Pishva Branch, Varamin, Pishva, Iran. Tel: +98-9122043654 Fax: +98-2136724767
| | - Nazanin Farhadyar
- Department of Chemistry, Science Collage, Islamic Azad University of Varamin, Pishva Branch, Varamin, Pishva, Iran
| | - Ensieh Lotfali
- Department of Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
10
|
He Y, Pang J, Yang Z, Zheng M, Yu Y, Liu Z, Zhao B, Hu G, Yin R. Toluidine blue O-induced photoinactivation inhibit the biofilm formation of methicillin-resistant Staphylococcus aureus. Photodiagnosis Photodyn Ther 2022; 39:102902. [DOI: 10.1016/j.pdpdt.2022.102902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 04/21/2022] [Accepted: 05/05/2022] [Indexed: 11/25/2022]
|
11
|
Upmanyu K, Haq QMR, Singh R. Factors mediating Acinetobacter baumannii biofilm formation: Opportunities for developing therapeutics. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100131. [PMID: 35909621 PMCID: PMC9325880 DOI: 10.1016/j.crmicr.2022.100131] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A. baumannii rapidly acquires antimicrobial resistance and causes biofilm associated infections. Strategies to target intrinsic factors mediating A. baumannii biofilm formation offer therapeutic prospects. Antimicrobial polymers and coating medical devices with antibiofilm agents may prevent biofilm associated infections. Biofilm matrix or regulatory mechanisms such as quorum sensing are potential targets for treating chronic infections. Phage therapy, photodynamic therapy and nanoparticle therapy are novel promising approaches for treating biofilm associated infections.
Acinetobacter baumannii has notably become a superbug due to its mounting risk of infection and escalating rates of antimicrobial resistance, including colistin, the last-resort antibiotic. Its propensity to form biofilm on biotic and abiotic surfaces has contributed to the majority of nosocomial infections. Bacterial cells in biofilms are resistant to antibiotics and host immune response, and pose challenges in treatment. Therefore current scenario urgently requires the development of novel therapeutic strategies for successful treatment outcomes. This article provides a holistic understanding of sequential events and regulatory mechanisms directing A. baumannii biofilm formation. Understanding the key factors functioning and regulating the biofilm machinery of A. baumannii will provide us insight to develop novel approaches to combat A. baumannii infections. Further, the review article deliberates promising strategies for the prevention of biofilm formation on medically relevant substances and potential therapeutic strategies for the eradication of preformed biofilms which can help tackle biofilm-associated A. baumannii infections. Advances in emerging therapeutic opportunities such as phage therapy, nanoparticle therapy and photodynamic therapy are also discussed to comprehend the current scenario and future outlook for the development of successful treatment against biofilm-associated A. baumannii infections.
Collapse
|
12
|
McNeilly O, Mann R, Hamidian M, Gunawan C. Emerging Concern for Silver Nanoparticle Resistance in Acinetobacter baumannii and Other Bacteria. Front Microbiol 2021; 12:652863. [PMID: 33936010 PMCID: PMC8085274 DOI: 10.3389/fmicb.2021.652863] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
The misuse of antibiotics combined with a lack of newly developed ones is the main contributors to the current antibiotic resistance crisis. There is a dire need for new and alternative antibacterial options and nanotechnology could be a solution. Metal-based nanoparticles, particularly silver nanoparticles (NAg), have garnered widespread popularity due to their unique physicochemical properties and broad-spectrum antibacterial activity. Consequently, NAg has seen extensive incorporation in many types of products across the healthcare and consumer market. Despite clear evidence of the strong antibacterial efficacy of NAg, studies have raised concerns over the development of silver-resistant bacteria. Resistance to cationic silver (Ag+) has been recognised for many years, but it has recently been found that bacterial resistance to NAg is also possible. It is also understood that exposure of bacteria to toxic heavy metals like silver can induce the emergence of antibiotic resistance through the process of co-selection. Acinetobacter baumannii is a Gram-negative coccobacillus and opportunistic nosocomial bacterial pathogen. It was recently listed as the "number one" critical level priority pathogen because of the significant rise of antibiotic resistance in this species. NAg has proven bactericidal activity towards A. baumannii, even against strains that display multi-drug resistance. However, despite ample evidence of heavy metal (including silver; Ag+) resistance in this bacterium, combined with reports of heavy metal-driven co-selection of antibiotic resistance, little research has been dedicated to assessing the potential for NAg resistance development in A. baumannii. This is worrisome, as the increasingly indiscriminate use of NAg could promote the development of silver resistance in this species, like what has occurred with antibiotics.
Collapse
Affiliation(s)
- Oliver McNeilly
- iThree Institute, University of Technology Sydney, Ultimo, NSW, Australia
| | - Riti Mann
- iThree Institute, University of Technology Sydney, Ultimo, NSW, Australia
| | - Mohammad Hamidian
- iThree Institute, University of Technology Sydney, Ultimo, NSW, Australia
| | - Cindy Gunawan
- iThree Institute, University of Technology Sydney, Ultimo, NSW, Australia
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, Australia
| |
Collapse
|
13
|
Openda YI, Matshitse R, Nyokong T. A search for enhanced photodynamic activity against Staphylococcus aureus planktonic cells and biofilms: the evaluation of phthalocyanine-detonation nanodiamond-Ag nanoconjugates. Photochem Photobiol Sci 2020; 19:1442-1454. [PMID: 33000851 DOI: 10.1039/d0pp00075b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The present work reports on the synthesis and characterization of novel zinc (2) and indium (3) 2-amino-4-bromophenoxy substituted phthalocyanines (Pcs) along with the self-assembled nanoconjugates formed viaπ-π stacking interaction onto detonation nanodiamonds (DNDs) to form 2@DNDs and 3@DNDs. 2@DNDs and 3@DNDs were covalently linked to chitosan-silver mediated nanoparticles (CSAg) to form 2@DNDs-CSAg and 3@DNDs-CSAg nanoconjugates. High singlet oxygen quantum yields in DMSO of 0.69 and 0.72 for Pcs alone and 0.90 and 0.92 for 2@DNDs-CSAg and 3@DNDs-CSAg, respectively, were obtained. The photodynamic antimicrobial chemotherapy (PACT) activity of both phthalocyanines and nanoconjugates was tested against planktonic cells and biofilms of S. aureus. 2@DNDs-CSAg and 3@DNDs-CSAg caused effective killing with a log reduction of 9.74. In addition, PACT studies on single-species S. aureus biofilms were carried out with log reduction values of 5.12 and 5.27 at 200 μg mL-1 for 2@DNDs-CSAg and 3@DNDs-CSAg, respectively.
Collapse
Affiliation(s)
- Yolande Ikala Openda
- Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Makhanda, 6140, South Africa.
| | | | | |
Collapse
|
14
|
Potentiation effects of antimicrobial photodynamic therapy on quorum sensing genes expression: A promising treatment for multi-species bacterial biofilms in burn wound infections. Photodiagnosis Photodyn Ther 2020; 30:101717. [DOI: 10.1016/j.pdpdt.2020.101717] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/26/2020] [Accepted: 03/06/2020] [Indexed: 12/31/2022]
|
15
|
Qin L, Hafezi M, Yang H, Dong G, Zhang Y. Constructing a Dual-Function Surface by Microcasting and Nanospraying for Efficient Drag Reduction and Potential Antifouling Capabilities. MICROMACHINES 2019; 10:mi10070490. [PMID: 31340477 PMCID: PMC6680531 DOI: 10.3390/mi10070490] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/18/2019] [Accepted: 07/21/2019] [Indexed: 01/18/2023]
Abstract
To improve the drag-reducing and antifouling performance of marine equipment, it is indispensable to learn from structures and materials that are found in nature. This is due to their excellent properties, such as intelligence, microminiaturization, hierarchical assembly, and adaptability. Considerable interest has arisen in fabricating surfaces with various types of biomimetic structures, which exhibit promising and synergistic performances similar to living organisms. In this study, a dual bio-inspired shark-skin and lotus-structure (BSLS) surface was developed for fabrication on commercial polyurethane (PU) polymer. Firstly, the shark-skin pattern was transferred on the PU by microcasting. Secondly, hierarchical micro- and nanostructures were introduced by spraying mesoporous silica nanospheres (MSNs). The dual biomimetic substrates were characterized by scanning electron microscopy, water contact angle characterization, antifouling, self-cleaning, and water flow impacting experiments. The results revealed that the BSLS surface exhibited dual biomimetic features. The micro- and nano-lotus-like structures were localized on a replicated shark dermal denticle. A contact angle of 147° was observed on the dual-treated surface and the contact angle hysteresis was decreased by 20% compared with that of the nontreated surface. Fluid drag was determined with shear stress measurements and a drag reduction of 36.7% was found for the biomimetic surface. With continuous impacting of high-speed water for up to 10 h, the biomimetic surface stayed superhydrophobic. Material properties such as inhibition of protein adsorption, mechanical robustness, and self-cleaning performances were evaluated, and the data indicated these behaviors were significantly improved. The mechanisms of drag reduction and self-cleaning are discussed. Our results indicate that this method is a potential strategy for efficient drag reduction and antifouling capabilities.
Collapse
Affiliation(s)
- Liguo Qin
- Key Laboratory of Education Ministry for Modern Design & Rotary-Bearing System, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China.
- Institute of Design Science and Basic Component, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China.
| | - Mahshid Hafezi
- Key Laboratory of Education Ministry for Modern Design & Rotary-Bearing System, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
- Institute of Design Science and Basic Component, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
| | - Hao Yang
- Key Laboratory of Education Ministry for Modern Design & Rotary-Bearing System, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
- Institute of Design Science and Basic Component, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
| | - Guangneng Dong
- Key Laboratory of Education Ministry for Modern Design & Rotary-Bearing System, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
- Institute of Design Science and Basic Component, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
| | - Yali Zhang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China.
| |
Collapse
|
16
|
Nadhe SB, Singh R, Wadhwani SA, Chopade BA. Acinetobacter sp. mediated synthesis of AgNPs, its optimization, characterization and synergistic antifungal activity against C. albicans. J Appl Microbiol 2019; 127:445-458. [PMID: 31074075 DOI: 10.1111/jam.14305] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 04/25/2019] [Accepted: 05/06/2019] [Indexed: 12/21/2022]
Abstract
AIMS To synthesize silver nanoparticles (AgNPs) with cell free extract of Acinetobacter sp. and evaluate antifungal activity against planktonic and biofilm of Candida. Also, to study mechanism of antifungal action of AgNPs. METHODS AND RESULT Acinetobacter spp were screened for synthesis of AgNPs. Physio-chemical parameters were optimized to obtained monodispersed nanoparticles. Optimized nanoparticles were characterized using spectroscopic, microscopic and diffraction techniques. Antifungal and biofilm disruption activity of AgNPs (10 ± 5 nm) were investigated against C. albicans. Mechanism of antifungal activity of nanosilver was deduced by growth curve, reactive oxygen species generation, thiol interaction and microscopic analysis. Acinetobacter sp. GWRFH 45 gave maximum synthesis of AgNPs. At optimized condition monodispersed, spherical nanoparticles were obtained which were crystalline with negative surface charge. AgNPs exhibited antifungal activity against planktonic cells and biofilm of Candida. AgNPs showed synergistic effect with amphotericin B as well as fluconazole against biofilm disruption. AgNPs were found to affect growth of Candida, generate reactive oxygen species and disrupt cellular morphology. CONCLUSIONS Cell free extract of A. calcoaceticus GWRFH 45 has ability to synthesize AgNPs. AgNPs alone and in combination with drugs have potential to inhibit C. albicans. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report of bacteriogenic AgNPs used in combination with antifungal drugs against Candida.
Collapse
Affiliation(s)
- S B Nadhe
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - R Singh
- Department of Biotechnology, SIES College of Arts Science and Commerce, Mumbai, Maharashtra, India
| | - S A Wadhwani
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - B A Chopade
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India.,Dr. Babasaheb Ambedkar, Marathwada University, Aurangabad, Maharashtra, India
| |
Collapse
|
17
|
Reaction parameters of in situ silver chloride precipitation on cellulose fibres. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 95:134-142. [DOI: 10.1016/j.msec.2018.10.070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 09/24/2018] [Accepted: 10/20/2018] [Indexed: 11/18/2022]
|
18
|
Dos Santos Ramos MA, Da Silva PB, Spósito L, De Toledo LG, Bonifácio BV, Rodero CF, Dos Santos KC, Chorilli M, Bauab TM. Nanotechnology-based drug delivery systems for control of microbial biofilms: a review. Int J Nanomedicine 2018; 13:1179-1213. [PMID: 29520143 PMCID: PMC5834171 DOI: 10.2147/ijn.s146195] [Citation(s) in RCA: 151] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Since the dawn of civilization, it has been understood that pathogenic microorganisms cause infectious conditions in humans, which at times, may prove fatal. Among the different virulent properties of microorganisms is their ability to form biofilms, which has been directly related to the development of chronic infections with increased disease severity. A problem in the elimination of such complex structures (biofilms) is resistance to the drugs that are currently used in clinical practice, and therefore, it becomes imperative to search for new compounds that have anti-biofilm activity. In this context, nanotechnology provides secure platforms for targeted delivery of drugs to treat numerous microbial infections that are caused by biofilms. Among the many applications of such nanotechnology-based drug delivery systems is their ability to enhance the bioactive potential of therapeutic agents. The present study reports the use of important nanoparticles, such as liposomes, microemulsions, cyclodextrins, solid lipid nanoparticles, polymeric nanoparticles, and metallic nanoparticles, in controlling microbial biofilms by targeted drug delivery. Such utilization of these nanosystems has led to a better understanding of their applications and their role in combating biofilms.
Collapse
Affiliation(s)
- Matheus Aparecido Dos Santos Ramos
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Biological Sciences, Araraquara, SP, Brazil
| | - Patrícia Bento Da Silva
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Drugs and Medicines. Araraquara, SP, Brazil
| | - Larissa Spósito
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Biological Sciences, Araraquara, SP, Brazil
| | - Luciani Gaspar De Toledo
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Biological Sciences, Araraquara, SP, Brazil
| | - Bruna Vidal Bonifácio
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Biological Sciences, Araraquara, SP, Brazil
| | - Camila Fernanda Rodero
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Drugs and Medicines. Araraquara, SP, Brazil
| | - Karen Cristina Dos Santos
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Drugs and Medicines. Araraquara, SP, Brazil
| | - Marlus Chorilli
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Drugs and Medicines. Araraquara, SP, Brazil
| | - Taís Maria Bauab
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Campus Araraquara, Department of Biological Sciences, Araraquara, SP, Brazil
| |
Collapse
|
19
|
Singh R, Shedbalkar UU, Nadhe SB, Wadhwani SA, Chopade BA. Lignin peroxidase mediated silver nanoparticle synthesis in Acinetobacter sp. AMB Express 2017; 7:226. [PMID: 29273886 PMCID: PMC5741566 DOI: 10.1186/s13568-017-0528-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 12/19/2017] [Indexed: 01/04/2023] Open
Abstract
Metals present in environment render the bacteria to attain certain resistance machinery to survive, one of which is transformation of metal ions to nano forms. Various enzymes and proteins have been suggested to play significant role in synthesis of silver nanoparticles (AgNPs) in bacteria. In present study, we have purified lignin peroxidase from secreted enzyme extract of Acinetobacter sp. employing diethyl aminoethyl cellulose ion exchange and Biogel P-150 gel filtration column chromatography. The purified fraction has a specific activity of 1.571 U/mg with substrate n-propanol and 6.5-fold purification. The tetrameric enzyme, with molecular weight of 99 kDa, consisted of dimers of two polypetides of 23.9 and 24.6 kDa as revealed by native and SDS-PAGE. On exposure to purified enzyme, spherical polydispersed AgNPs of ~ 50 nm were obtained as observed under transmission electron microscope. Optimum activity of the purified enzyme was obtained at pH 2 and 60 °C with n-propanol as substrate. This is the first report describing the reduction of extracellular silver ions by lignin peroxidase purified from Acinetobacter sp.
Collapse
|
20
|
Wadhwani SA, Gorain M, Banerjee P, Shedbalkar UU, Singh R, Kundu GC, Chopade BA. Green synthesis of selenium nanoparticles using Acinetobacter sp. SW30: optimization, characterization and its anticancer activity in breast cancer cells. Int J Nanomedicine 2017; 12:6841-6855. [PMID: 28979122 PMCID: PMC5602452 DOI: 10.2147/ijn.s139212] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The aim of this study was to synthesize selenium nanoparticles (SeNPs) using cell suspension and total cell protein of Acinetobacter sp. SW30 and optimize its synthesis by studying the influence of physiological and physicochemical parameters. Also, we aimed to compare its anticancer activity with that of chemically synthesized SeNPs in breast cancer cells. Cell suspension of Acinetobacter sp. SW30 was exposed to various physiological and physicochemical conditions in the presence of sodium selenite to study their effects on the synthesis and morphology of SeNPs. Breast cancer cells (4T1, MCF-7) and noncancer cells (NIH/3T3, HEK293) were exposed to different concentrations of SeNPs. The 18 h grown culture with 2.7×109 cfu/mL could synthesize amorphous nanospheres of size 78 nm at 1.5 mM and crystalline nanorods at above 2.0 mM Na2SeO3 concentration. Polygonal-shaped SeNPs of average size 79 nm were obtained in the supernatant of 4 mg/mL of total cell protein of Acinetobacter sp. SW30. Chemical SeNPs showed more anticancer activity than SeNPs synthesized by Acinetobacter sp. SW30 (BSeNPs), but they were found to be toxic to noncancer cells also. However, BSeNPs were selective against breast cancer cells than chemical ones. Results suggest that BSeNPs are a good choice of selection as anticancer agents.
Collapse
Affiliation(s)
| | - Mahadeo Gorain
- Laboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science, Savitribai Phule Pune University Campus, Pune
| | - Pinaki Banerjee
- Laboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science, Savitribai Phule Pune University Campus, Pune
| | | | - Richa Singh
- Department of Microbiology, Savitribai Phule Pune University
| | - Gopal C Kundu
- Laboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science, Savitribai Phule Pune University Campus, Pune
| | - Balu A Chopade
- Department of Microbiology, Savitribai Phule Pune University.,Dr Babasaheb Ambedkar Marathwada University, Aurangabad, Maharashtra, India
| |
Collapse
|
21
|
Delivery systems for antimicrobial peptides. Adv Colloid Interface Sci 2017; 242:17-34. [PMID: 28159168 DOI: 10.1016/j.cis.2017.01.005] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/24/2017] [Accepted: 01/24/2017] [Indexed: 12/18/2022]
Abstract
Due to rapidly increasing resistance development against conventional antibiotics, finding novel approaches for the treatment of infections has emerged as a key health issue. Antimicrobial peptides (AMPs) have attracted interest in this context, and there is by now a considerable literature on the identification such peptides, as well as on their optimization to reach potent antimicrobial and anti-inflammatory effects at simultaneously low toxicity against human cells. In comparison, delivery systems for antimicrobial peptides have attracted considerably less interest. However, such delivery systems are likely to play a key role in the development of potent and safe AMP-based therapeutics, e.g., through reducing chemical or biological degradation of AMPs either in the formulation or after administration, by reducing adverse side-effects, by controlling AMP release rate, by promoting biofilm penetration, or through achieving co-localization with intracellular pathogens. Here, an overview is provided of the current understanding of delivery systems for antimicrobial peptides, with special focus on AMP-carrier interactions, as well as consequences of these interactions for antimicrobial and related biological effects of AMP-containing formulations.
Collapse
|