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Fu Q, Tian M, Yang Y, Zhu Y, Zhou H, Tan J, Wang J, Huang Q. Paotianxiong polysaccharides potential prebiotics: Structural analysis and prebiotic properties. Food Chem 2024; 451:139499. [PMID: 38703731 DOI: 10.1016/j.foodchem.2024.139499] [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: 10/29/2023] [Revised: 03/11/2024] [Accepted: 04/24/2024] [Indexed: 05/06/2024]
Abstract
Paotianxiong (PTX) is a processing product of Aconitum carmichaelii Debx., often used as a tonic food daily. However, the structure and activity of the polysaccharide component that plays a major role still need to be determined. In our work, two new polysaccharides were purified from PTX and named PTXP-1 and PTXP-2. Structural analysis showed that PTXP-1 is a glucan with a molecular weight of 915 Da and a structure of 4)-α-D-Glcp-(1 → as the main chain. PTXP-2 is a glucose arabinoglycan with 4)-α-D-Glcp-(1 → as the main chain, containing 8 glycosidic bonds attached, and a molecular weight of 57.9KDa. In vitro probiotic experiments demonstrated that PTXP-1 could significantly promote probiotic growth and acid production. In vivo experiments demonstrated that both PTXP-1 and PTXP-2 exhibited significant effectiveness in promoting the growth of intestinal probiotics. These findings help expand the application of polysaccharide components extracted from tonic herbs as functional food ingredients.
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Affiliation(s)
- Qinwen Fu
- State key laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China; College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Maoying Tian
- State key laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China; College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Yu Yang
- State key laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China; College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Ying Zhu
- State key laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China; College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Hailun Zhou
- State key laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China; College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Jin Tan
- Gooddoctor Pharmaceutical Group Co., Ltd, Chengdu, Sichuan, China
| | - Jin Wang
- State key laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China; College of Ethnic Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China.
| | - Qinwan Huang
- State key laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China; College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China.
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2
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Marra D, Orillo E, Toscano G, Petala M, Karapantsios TD, Caserta S. The role of air relative humidity on the wettability of Pseudomonas fluorescens AR11 biofilms. Colloids Surf B Biointerfaces 2024; 237:113831. [PMID: 38508084 DOI: 10.1016/j.colsurfb.2024.113831] [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: 11/20/2023] [Revised: 02/22/2024] [Accepted: 02/29/2024] [Indexed: 03/22/2024]
Abstract
Biofilms are complex porous materials formed by microorganisms, polysaccharides, proteins, eDNA, inorganic matter, and water. They are ubiquitous in various environmental niches and are known to grow at solid-liquid, solid-air and air-liquid interfaces, often causing problems in several industrial and sanitary fields. Their removal is a challenge in many applications and numerous studies have been conducted to identify promising chemical species as cleaning agents. While these substances target specific components of biofilm structure, the role of water content in biofilm, and how it can influence wettability and detergent absorption have been quite neglected in the literature. Estimating water content in biofilm is a challenging task due to its heterogeneity in morphology and chemical composition. In this study, we controlled water content in Pseudomonas fluorescens AR 11 biofilms grown on submerged glass slides by regulating environmental relative humidity after drying. Interfacial properties of biofilm were investigated by measuring wetting of water and soybean oil. The morphology of biofilm structure was evaluated using Confocal Laser Scanning Microscopy and Scanning Electron Microscopy. The results showed that biofilm water content has a significant and measurable effect on its wettability, leading to the hypothesis that a preliminary control of water content can play a crucial role in biofilm removal process.
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Affiliation(s)
- Daniele Marra
- DICMaPI, Università di Napoli Federico II, P.le V.Tecchio 80, Napoli 80125, Italy
| | - Emilia Orillo
- DICMaPI, Università di Napoli Federico II, P.le V.Tecchio 80, Napoli 80125, Italy
| | - Giuseppe Toscano
- DICMaPI, Università di Napoli Federico II, P.le V.Tecchio 80, Napoli 80125, Italy
| | - Maria Petala
- Department of Civil Engineering, University Box 487, Thessaloniki 54 124, Greece
| | - Thodoris D Karapantsios
- Department of Chemical Technology and Industrial Chemistry, School of Chemistry, Aristotle University, University Box 116, 541 24 Thessaloniki, Greece
| | - Sergio Caserta
- DICMaPI, Università di Napoli Federico II, P.le V.Tecchio 80, Napoli 80125, Italy; CEINGE, Advanced Biotechnologies, Naples 80145, Italy.
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Kampouraki ZC, Petala M, Zacharias K, Konstantinidis A, Zabulis X, Karamaounas P, Kostoglou M, Karapantsios TD. Highly sensitive resistance spectroscopy technique for online monitoring of biofilm growth on metallic surfaces. ENVIRONMENTAL RESEARCH 2024; 240:117401. [PMID: 37918765 DOI: 10.1016/j.envres.2023.117401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/02/2023] [Accepted: 10/11/2023] [Indexed: 11/04/2023]
Abstract
Online techniques for monitoring biofilm formation and evolution are limited, especially as regards its application in flowing water systems. This is chiefly due to the absence of efficient non-destructive and non-invasive sensing methods. In this study, a sensitive electrical resistance spectroscopy technique is developed to monitor non-invasively and in real time the growth of biofilms over metallic surfaces inside water flow systems. To this aim, Pseudomonas fluorescens strain is used for biofilm development lasting 72 h in a laboratory-scale test channel of orthogonal cross section. Biofilm development corresponds to a progressively increasing coverage of the metallic surface area up to full coverage and a progressively increasing thickness. Biofilm development is registered by continuous recording of electrical impedance signals (time series). Proper configuration and tuning of the electronics promote the resistive contribution to the signal whereas careful grounding diminishes electrical interferences and yields superb sensing sensitivity. An increase of relative electrical resistance of around 15% is noticed in 72 h flow experiments which is attributed to both an increase of metallic surface area coverage and an increase of biofilm thickness. An independent estimation of these quantities using imaging tools and microscopy analysis, indicates that full coverage of the metallic surface occurs after only 48 h of the flow experiment, whereas biofilm thickness increases gradually along the entire 72 h of the experiment. Cross-examination of electrical signals with biofilm characteristics (metallic surface coverage and biofilm thickness) reveals that, qualitatively speaking, electrical signals are rather more sensitive to metallic surface coverage than biofilm thickness.
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Affiliation(s)
- Zoi Christina Kampouraki
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 541 24, Thessaloniki, Greece
| | - Maria Petala
- Department of Civil Engineering, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece
| | - Konstantinos Zacharias
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 541 24, Thessaloniki, Greece
| | - Avraam Konstantinidis
- Laboratory of Engineering Mechanics, School of Civil Engineering, Aristotle University of Thessaloniki, GR, 541 24, Thessaloniki, Greece
| | - Xenophon Zabulis
- Institute of Computer Science, Foundation for Research and Technology, 711 10, Heraklion, Greece
| | - Polykarpos Karamaounas
- Institute of Computer Science, Foundation for Research and Technology, 711 10, Heraklion, Greece
| | - Margaritis Kostoglou
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 541 24, Thessaloniki, Greece
| | - Thodoris D Karapantsios
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 541 24, Thessaloniki, Greece.
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Recupido F, Petala M, Caserta S, Marra D, Kostoglou M, Karapantsios TD. Forced Wetting Properties of Bacteria-Laden Droplets Experiencing Initial Evaporation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37079897 DOI: 10.1021/acs.langmuir.3c00179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Microbial adhesion and spreading on surfaces are crucial aspects in environmental and industrial settings being also the early stage of complex surface-attached microbial communities known as biofilms. In this work, Pseudomonas fluorescens-laden droplets on hydrophilic substrates (glass coupons) are allowed to partially evaporate before running wetting measurements, to study the effect of evaporation on their interfacial behavior during spillover or splashing. Forced wetting is investigated by imposing controlled centrifugal forces, using a novel rotatory device (Kerberos). At a defined evaporation time, results for the critical tangential force required for the inception of sliding are presented. Microbe-laden droplets exhibit different wetting/spreading properties as a function of the imposed evaporation times. It is found that evaporation is slowed down in bacterial droplets with respect to nutrient medium ones. After sufficient drying times, bacteria accumulate at droplet edges, affecting the droplet shape and thus depinning during forced wetting tests. Droplet rear part does not pin during the rotation test, while only the front part advances and spreads along the force direction. Quantitative results obtained from the well-known Furmidge's equation reveal that force for sliding inception increases as evaporation time increases. This study can be of support for control of biofilm contamination and removal and possible design of antimicrobial/antibiofouling surfaces.
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Affiliation(s)
- Federica Recupido
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54 124 Thessaloniki, Greece
| | - Maria Petala
- Department of Civil Engineering, Aristotle University of Thessaloniki, University Box 10, 54 124 Thessaloniki, Greece
| | - Sergio Caserta
- Department of Chemical, Materials and Industrial Production Engineering (DICMaPI), Piazzale V. Tecchio 80, 80125 Naples, Italy
- CEINGE Advanced Biotechnology, Gaetano Salvatore 486, 80145 Naples, Italy
| | - Daniele Marra
- Department of Chemical, Materials and Industrial Production Engineering (DICMaPI), Piazzale V. Tecchio 80, 80125 Naples, Italy
| | - Margaritis Kostoglou
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54 124 Thessaloniki, Greece
| | - Thodoris D Karapantsios
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54 124 Thessaloniki, Greece
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5
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Mu M, Liu S, DeFlorio W, Hao L, Wang X, Salazar KS, Taylor M, Castillo A, Cisneros-Zevallos L, Oh JK, Min Y, Akbulut M. Influence of Surface Roughness, Nanostructure, and Wetting on Bacterial Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:5426-5439. [PMID: 37014907 PMCID: PMC10848269 DOI: 10.1021/acs.langmuir.3c00091] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/22/2023] [Indexed: 05/11/2023]
Abstract
Bacterial fouling is a persistent problem causing the deterioration and failure of functional surfaces for industrial equipment/components; numerous human, animal, and plant infections/diseases; and energy waste due to the inefficiencies at internal and external geometries of transport systems. This work gains new insights into the effect of surface roughness on bacterial fouling by systematically studying bacterial adhesion on model hydrophobic (methyl-terminated) surfaces with roughness scales spanning from ∼2 nm to ∼390 nm. Additionally, a surface energy integration framework is developed to elucidate the role of surface roughness on the energetics of bacteria and substrate interactions. For a given bacteria type and surface chemistry; the extent of bacterial fouling was found to demonstrate up to a 75-fold variation with surface roughness. For the cases showing hydrophobic wetting behavior, both increased effective surface area with increasing roughness and decreased activation energy with increased surface roughness was concluded to enhance the extent of bacterial adhesion. For the cases of superhydrophobic surfaces, the combination of factors including (i) the surpassing of Laplace pressure force of interstitial air over bacterial adhesive force, (ii) the reduced effective substrate area for bacteria wall due to air gaps to have direct/solid contact, and (iii) the reduction of attractive van der Waals force that holds adhering bacteria on the substrate were summarized to weaken the bacterial adhesion. Overall, this study is significant in the context of designing antifouling coatings and systems as well as explaining variations in bacterial contamination and biofilm formation processes on functional surfaces.
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Affiliation(s)
- Minchen Mu
- Artie
McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Shuhao Liu
- Artie
McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - William DeFlorio
- Artie
McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Li Hao
- School
of Chemistry and Chemical Engineering, Zhongkai
University of Agriculture and Engineering, Guangzhou, Guangdong 510225, P. R. China
| | - Xunhao Wang
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Karla Solis Salazar
- Department
of Food Science and Technology, Texas A&M
University, College Station, Texas 77843, United States
| | - Matthew Taylor
- Department
of Food Science and Technology, Texas A&M
University, College Station, Texas 77843, United States
| | - Alejandro Castillo
- Department
of Food Science and Technology, Texas A&M
University, College Station, Texas 77843, United States
| | - Luis Cisneros-Zevallos
- Department
of Horticultural Sciences, Texas A&M
University, College Station, Texas 77843, United States
| | - Jun Kyun Oh
- Department
of Polymer Science and Engineering, Dankook
University, 152 Jukjeon-ro, Suji-gu, Yongin-si, Gyeonggi-do 16890, Republic of Korea
| | - Younjin Min
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Mustafa Akbulut
- Artie
McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
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Nanoparticle Coatings on Glass Surfaces to Prevent Pseudomonas fluorescens AR 11 Biofilm Formation. Microorganisms 2023; 11:microorganisms11030621. [PMID: 36985196 PMCID: PMC10057769 DOI: 10.3390/microorganisms11030621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/17/2023] [Accepted: 02/18/2023] [Indexed: 03/06/2023] Open
Abstract
Microbial colonization of surfaces is a sanitary and industrial issue for many applications, leading to product contamination and human infections. When microorganisms closely interact with a surface, they start to produce an exo-polysaccaridic matrix to adhere to and protect themselves from adverse environmental conditions. This type of structure is called a biofilm. The aim of our work is to investigate novel technologies able to prevent biofilm formation by surface coatings. We coated glass surfaces with melanin-ZnO2, melanin-TiO2, and TiO2 hybrid nanoparticles. The functionalization was performed using cold plasma to activate glass-substrate-coated surfaces, that were characterized by performing water and soybean oil wetting tests. A quantitative characterization of the antibiofilm properties was done using Pseudomonas fluorescens AR 11 as a model organism. Biofilm morphologies were observed using confocal laser scanning microscopy and image analysis techniques were used to obtain quantitative morphological parameters. The results highlight the efficacy of the proposed surface coating to prevent biofilm formation. Melanin-TiO2 proved to be the most efficient among the particles investigated. Our results can be a valuable support for future implementation of the technique proposed here in an extended range of applications that may include further testing on other strains and other support materials.
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Kampouraki ZC, Petala M, Boumpakis A, Skordaris G, Michailidis N, Deliyanni E, Kostoglou M, Karapantsios TD. Wetting and Imbibition Characteristics of Pseudomonas fluorescens Biofilms Grown on Stainless Steel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9810-9821. [PMID: 35786927 DOI: 10.1021/acs.langmuir.2c00828] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This study aims to provide insights into biofilm resistance associated with their structural properties acquired during formation and development. On this account, the wetting and imbibition behavior of dehydrated Pseudomonas fluorescens biofilms grown on stainless steel electropolished substrates is thoroughly examined at different biofilm ages. A polar liquid (water) and a non-polar liquid (diiodomethane) are employed as wetting agents in the form of sessile droplets. A mathematical model is applied to appraise the wetting and imbibition performance of biofilms incorporating the evaporation of sessile droplets. The present results show that the examined biofilms are hydrophilic. The progressive growth of biofilms leads to a gradual increase of substrate surface coverage─up to full coverage─accompanied by a gradual decrease of biofilm surface roughness. It is noteworthy that just after 24 h of biofilm growth, the surface roughness increases about 6.7 times the roughness of the clean stainless steel surface. It is further found that the imbibition of liquid in the biofilm matrix is restricted only to the biofilm region under the sessile droplet. The lack of further capillary imbibition into the biofilm structure, beyond the droplet deposition region, implies that the biofilm matrix is not in the form of an extended network of interconnected micro/nanopores. All in all, the present results indicate a resilient biofilm structure to biocide penetration despite its hydrophilic nature.
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Affiliation(s)
- Zoi Christina Kampouraki
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
| | - Maria Petala
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
| | - Apostolos Boumpakis
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
| | - Georgios Skordaris
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
| | - Nikolaos Michailidis
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
| | - Eleni Deliyanni
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
| | - Margaritis Kostoglou
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
| | - Thodoris D Karapantsios
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 54124 Thessaloniki, Greece
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Wetting properties of dehydrated biofilms under different growth conditions. Colloids Surf B Biointerfaces 2021; 210:112245. [PMID: 34891062 DOI: 10.1016/j.colsurfb.2021.112245] [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: 06/16/2021] [Revised: 11/06/2021] [Accepted: 11/21/2021] [Indexed: 11/20/2022]
Abstract
Biofilms are resilient to environmental conditions and often resistant even to strong disinfectants. It is crucial to investigate their interfacial properties, which can be effectively characterized by wetting analysis. Wetting phenomena on biofilm surfaces have been poorly investigated in literature, in particular a systematic study of wetting on real biofilm-coated substrates including the application of external body forces (forced wetting, i.e.: centrifugal and gravitational forces) is missing. The aim of this work is to study the role of nutrient and shear flow conditions on wetting properties of Pseudomonas fluorescens dehydrated biofilms, grown on glass substrates. An innovative device (Kerberos®), capable to study spreading/sliding behavior under the application of external body forces, is used here for a systematic analysis of wetting/de-wetting liquid droplets on horizontal substrates under the action of tangential forces. Results prove that, under different growth conditions, (i.e., nutrients and imposed flow), biofilms exhibit different wetting properties. At lower nutrient/shear flow conditions, biofilms show spreading/sliding behavior close to that of pure glass. At higher nutrient and shear flow conditions, droplets on biofilms show spreading followed by imbibition soon after deposition, which leads to peculiar droplet depinning during the rotation test. Wetting properties are derived as a function of the rotation speed from both top and side views videoframes through a dedicated image analysis technique. A detailed analysis of biofilm formation and morphology/topography is also provided here.
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