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Shirazi HA, Lee S, Ullah S, Almdal K. Structural and tribological studies on the interaction of porcine gastric mucin with non- and cationic-modified β-lactoglobulins. Colloids Surf B Biointerfaces 2024; 238:113924. [PMID: 38669751 DOI: 10.1016/j.colsurfb.2024.113924] [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: 01/24/2024] [Revised: 04/16/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024]
Abstract
β-lactoglobulin (BLG) is the major whey protein with negative charges at neutral pH in aqueous media. Thus, the interaction with mucins, the major polyanionic component of mucus, is very weak due to the electrostatic repulsion between them. The present study postulates that cationization of BLG molecules may reverse the interaction characteristics between BLG and mucin from repulsive to associative. To this end, cationic-modified BLGs were prepared by grafting positively charged ethylenediamine (EDA) moieties into the negatively charged carboxyl groups on the aspartic and glutamic acid residues and compared with non-modified BLG upon mixing with porcine gastric mucin (PGM). To characterize the structural and conformational features of PGM, non/cationized BLGs, and their mixtures, various spectroscopic approaches, including zeta potential, dynamic light scattering (DLS), and circular dichroism (CD) spectroscopy were employed. Importantly, we have taken surface adsorption with optical waveguide lightmode spectroscopy (OWLS), and tribological properties with pin-on-disk tribometry at the sliding interface as the key approaches to determine the interaction nature between them as mixing PGM with polycations can lead to synergistic lubrication at the nonpolar substrate in neutral aqueous media as a result of an electrostatic association. All the spectroscopic studies and a substantial improvement in lubricity collectively supported a tenacious and associative interaction between PGM and cationized BLGs, but not between PGM and non-modified BLG. This study demonstrates a unique and successful approach to intensify the interaction between BLG and mucins, which is meaningful for a broad range of disciplines, including food science, macromolecular interactions, and biolubrication etc.
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Affiliation(s)
- Hadi Asgharzadeh Shirazi
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Seunghwan Lee
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark; Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, LS2 JT9, Leeds, The United Kingdom.
| | - Saif Ullah
- Department of Chemistry, Technical University of Denmark, DTU Chemistry, DK-2800, Kgs. Lyngby, Denmark
| | - Kristoffer Almdal
- Department of Chemistry, Technical University of Denmark, DTU Chemistry, DK-2800, Kgs. Lyngby, Denmark
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Cai Y, Liu L, Xia M, Tian C, Wu W, Dong B, Chu X. SEDDS facilitate cinnamaldehyde crossing the mucus barrier: The perspective of mucus and Caco-2/HT29 co-culture models. Int J Pharm 2022; 614:121461. [PMID: 35026310 DOI: 10.1016/j.ijpharm.2022.121461] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/19/2021] [Accepted: 01/06/2022] [Indexed: 10/19/2022]
Abstract
Self-emulsifying drug delivery systems (SEDDS) have potential applications in the delivery of hydrophobic components. Oral drugs are readily captured and cleared by intestinal mucus, a natural barrier that covers the mucosal epithelium and prevents the entry of foreign substances. In this study, we investigated for the first time the ability of SEDDS to deliver the lipophilic aldehyde cinnamaldehyde (CA-SEDDS) in rat mucus, mucin solution, Caco-2 and Caco-2/HT29 co-culture monolayer systems. CA-SEDDS was characterized by particle size, Zeta potential and the logDSEDDS/release medium. The capacity of CA-SEDDS to enhance mucus permeability was investigated in rat intestinal mucus gel and mucin solution with the period of in 12 h by Transwell® diffusion. We evaluated the potential of CA-SEDDS delivery of CA in a co-culture system of absorptive Caco-2 and mucus-secreting HT29 cells. CA-SEDDS exhibited excellent mucus permeability in mucus and mucin solutions, 5.1- and 2.8-fold higher than the free CA group, respectively. CA-SEDDS penetration increased by 2.5-fold compared with free CA when using the mucus-secreting co-culture cell model as a barrier. The relative oral bioavailability of CA-SEDDS was 242% compared to CA without formulation. These findings suggest that SEDDS exhibited good release and superior mucus permeability, displaying great potential for the future of hydrophobic oral applications.
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Affiliation(s)
- Ye Cai
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, China
| | - Liu Liu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; College of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China; Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, China
| | - Mengqiu Xia
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, China
| | - Chunling Tian
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, China
| | - Wenqing Wu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, China
| | - Baoqi Dong
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, China
| | - Xiaoqin Chu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Institute of Pharmaceutics, Anhui Academy of Chinese Medicine, Hefei 230012, China; Anhui Province Key Laboratory of Pharmaceutical Preparation Technology and Application, China; Engineering Technology Research Center of Modern Pharmaceutical Preparation, Anhui Province, China.
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Shirazi HA, Lee S. Complexation between porcine gastric mucin (PGM) and lysozyme: Influence of heat treatment of lysozyme on the tribological properties. Int J Biol Macromol 2022; 203:212-221. [PMID: 35093433 DOI: 10.1016/j.ijbiomac.2022.01.122] [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: 11/10/2021] [Revised: 01/12/2022] [Accepted: 01/19/2022] [Indexed: 11/05/2022]
Abstract
The influence of complexation between porcine gastric mucin (PGM) and lysozyme (LYZ) solutions (pH⁓7.0) on their lubricating properties was studied at a hydrophobic self-mated polydimethylsiloxane (PDMS) tribopair. To this end, LYZ solutions with varying heating time, namely 1hr, 3hr-, and 6hr at 90 °C, as well as unheated LYZ solution, were prepared. The lubricating capability of PGM and LYZ solutions and also their mixtures was characterized using pin-on-disk tribometry. In parallel, to precisely investigate the interaction between PGM and LYZ solutions, an array of the well-known experiments including electrophoretic-dynamic light scattering, circular dichroism spectroscopy and optical waveguide light-mode spectroscopy were employed. These experiments were utilized to elucidate the key features e.g. zeta potential, hydrodynamic diameter, conformational structure and mass adsorption. The tribometry results indicated that both PGM and unheated LYZ solutions had poor lubricating properties in the boundary lubrication regime (sliding speed lower than 10 mm/s). Mixing PGM with unheated LYZ led to a slight decrease in the friction coefficient, but no desirable lubricity was observed. An optimum slippery characteristic was achieved by incorporating 1hr heated LYZ solution into PGM one. Excellent lubricity of PGM/1hr heated LYZ may stem from surface charge compensation, tenaciously compact aggregation, unique conformational structure and considerable mass adsorption onto PDMS. This finding revealed that a strong interaction between PGM and LYZ molecules and as a result, the promising lubricating capability of PGM/LYZ mixtures, can be administered by varying heat-treatment duration of LYZ proteins.
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Affiliation(s)
- Hadi Asgharzadeh Shirazi
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Seunghwan Lee
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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Comparative Study of Chitosan and Oligochitosan Coatings on Mucoadhesion of Curcumin Nanosuspensions. Pharmaceutics 2021; 13:pharmaceutics13122154. [PMID: 34959433 PMCID: PMC8703452 DOI: 10.3390/pharmaceutics13122154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/15/2021] [Accepted: 12/07/2021] [Indexed: 11/16/2022] Open
Abstract
Curcumin nanosuspensions (Cur-NSs), chitosan-coated Cur-NSs (CS-Cur-NSs), and oligochitosan-coated Cur-NSs (OCS-Cur-NSs) were prepared by using an ultrasonic homogenization technique. The mean particle size of Cur-NSs was 210.9 nm and significantly (p < 0.05) increased to 368.8 nm by CS coating and decreased to 172.8 nm by OCS coating. Encapsulation efficiencies of Cur-NSs, CS-Cur-NSs, and OCS-Cur-NSs were 80.6%, 91.4%, and 88.5%, respectively. The mucin adsorption of Cur-NSs was steeply increased about 3–4 times by CS and OCS coating. Morphological changes of these NSs were studied using circular dichroism spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). Thus, CS-Cur-NSs and OCS-Cur-NSs showed great potential as mucoadhesive nano-carriers for the efficient delivery of water insoluble compounds like curcumin to the gastrointestinal system.
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Liu C, Madl AC, Cirera‐Salinas D, Kress W, Straube F, Myung D, Fuller GG. Mucin-Like Glycoproteins Modulate Interfacial Properties of a Mimetic Ocular Epithelial Surface. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2100841. [PMID: 34184839 PMCID: PMC8373091 DOI: 10.1002/advs.202100841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/19/2021] [Indexed: 05/05/2023]
Abstract
Dry eye disease (DED) has high personal and societal costs, but its pathology remains elusive due to intertwined biophysical and biochemical processes at the ocular surface. Specifically, mucin deficiency is reported in a subset of DED patients, but its effects on ocular interfacial properties remain unclear. Herein a novel in vitro mucin-deficient mimetic ocular surface (Mu-DeMOS) with a controllable amount of membrane-tethered mucin molecules is developed to represent the diseased ocular surfaces. Contact angle goniometry on mimetic ocular surfaces reveals that high surface roughness, but not the presence of hydrophilic mucin molecules, delivers constant hydration over native ocular surface epithelia. Live-cell rheometry confirms that the presence of mucin-like glycoproteins on ocular epithelial cells reduces shear adhesive strength at cellular interfaces. Together, optimal surface roughness and surface chemistry facilitate sustainable lubrication for healthy ocular surfaces, while an imbalance between them contributes to lubrication-related dysfunction at diseased ocular epithelial surfaces. Furthermore, the restoration of low adhesive strength at Mu-DeMOS interfaces through a mucin-like glycoprotein, recombinant human lubricin, suggests that increased frictional damage at mucin-deficient cellular surfaces may be reversible. More broadly, these results demonstrate that Mu-DeMOS is a promising platform for drug screening assays and fundamental studies on ocular physiology.
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Affiliation(s)
- Chunzi Liu
- Department of Chemical EngineeringStanford UniversityStanfordCA94305USA
| | - Amy C. Madl
- Department of Chemical EngineeringStanford UniversityStanfordCA94305USA
| | - Daniel Cirera‐Salinas
- Global Drug DevelopmentBiopharmaceutical Process & Product DevelopmentNovartis PharmaBaselAG 4002Switzerland
| | - Wolfgang Kress
- Global Drug DevelopmentBiopharmaceutical Process & Product DevelopmentNovartis PharmaBaselAG 4002Switzerland
| | - Frank Straube
- Global Drug DevelopmentBiopharmaceutical Process & Product DevelopmentNovartis PharmaBaselAG 4002Switzerland
| | - David Myung
- Department of Chemical EngineeringStanford UniversityStanfordCA94305USA
- Department of OphthalmologyStanford UniversityStanfordCA94305USA
| | - Gerald G. Fuller
- Department of Chemical EngineeringStanford UniversityStanfordCA94305USA
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Onnainty R, Usseglio N, Bonafé Allende JC, Granero GE. Exploring a new free-standing polyelectrolyte (PEM) thin film as a predictive tool for drug-mucin interactions: Insights on drug transport through mucosal surfaces. Int J Pharm 2021; 604:120764. [PMID: 34087412 DOI: 10.1016/j.ijpharm.2021.120764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/27/2021] [Accepted: 05/30/2021] [Indexed: 11/29/2022]
Abstract
The main objective of the present work was to design a biomimetic free-standing multilayered PEM film, constructed by the layer-by-layer (LbL) assembly approach, based on natural biopolymers and intended to recreate the complex mucus-mimetic matrices in order to provide mechanistic insights into biophysical interactions between drugs and the physiological gel-forming mucin network of mucus that covers the mucosal epithelia named as(CS/ALG)/(PGM) PEM film. The obtained results indicate that mucin may delay or increase drug precipitation on the mucus layer, depending on specific drug-mucin interactions driving drug supersaturation or drug crystallization phenomena. It was found that the drug lipophilicity characteristics governed the mucin binding degree, which had an influencing role on the drug translocation across this gel-like hydrogel. Moreover, the ionization of these drugs did not have a significant role on the drug binding ability to mucin as much as the lipophilicity properties did. The (CS/ALG)/(PGM) PEM film may be a promising tool to routine testing drug-mucus interactions to evaluate biophysical interactions between this protective barrier of the organism against different drug therapeutic products or external aggressive agents, leading to the optimization of drug delivery products or drugs for particular disease states.
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Affiliation(s)
- R Onnainty
- Unidad de Investigación y Desarrollo en TecnologíaFarmacéutica (UNITEFA), CONICET and Departamento de CienciasFarmacéuticas, Facultad de CienciasQuímicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000-HUA Córdoba, Argentina
| | - N Usseglio
- Unidad de Investigación y Desarrollo en TecnologíaFarmacéutica (UNITEFA), CONICET and Departamento de CienciasFarmacéuticas, Facultad de CienciasQuímicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000-HUA Córdoba, Argentina
| | - J C Bonafé Allende
- Departamento de QuímicaOrgánica, Facultad de CienciasQuímicas (Universidad Nacional de Córdoba), IPQA-CONICET, Haya de la Torre y Av. Medina Allende, 5000 Córdoba, Argentina
| | - G E Granero
- Unidad de Investigación y Desarrollo en TecnologíaFarmacéutica (UNITEFA), CONICET and Departamento de CienciasFarmacéuticas, Facultad de CienciasQuímicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000-HUA Córdoba, Argentina.
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Liu L, Tian C, Dong B, Xia M, Cai Y, Hu R, Chu X. Models to evaluate the barrier properties of mucus during drug diffusion. Int J Pharm 2021; 599:120415. [PMID: 33647411 DOI: 10.1016/j.ijpharm.2021.120415] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/07/2021] [Accepted: 02/18/2021] [Indexed: 02/06/2023]
Abstract
Mucus is widely disseminated in the nasal cavity, oral cavity, respiratory tract, eyes, gastrointestinal tract, and reproductive tract to prevent the invasion of pathogenic bacteria and toxins. The mucus layer through its continuous secretion can prevent the passage of macromolecular substances such as pathogenic bacteria and toxins, thereby reducing the occurrence of inflammation. Without a doubt, mucus also hinders oral absorption. The physiological and biochemical properties of intestinal mucus and the different types of mucus barrier models need to be predominated. To find ways to increase the bioavailability of drugs in the future, this article summarizes mucus composition, barrier properties, mucus models, and mucoadhesive/mucopenetrating particles to highlight the information they can afford. Collectively, the review seeks to provide a state-of-the-art roadmap for researchers who must contend with this critical barrier to drug delivery.
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Affiliation(s)
- Liu Liu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Chunling Tian
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Baoqi Dong
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Mengqiu Xia
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Ye Cai
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Rongfeng Hu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Institute of Pharmaceutics, Anhui Academy of Chinese Medicine, Hefei 230012, China
| | - Xiaoqin Chu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Institute of Pharmaceutics, Anhui Academy of Chinese Medicine, Hefei 230012, China.
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Morphological, Mechanical and Mucoadhesive Properties of Electrospun Chitosan/Phospholipid Hybrid Nanofibers. Int J Mol Sci 2018; 19:ijms19082266. [PMID: 30072627 PMCID: PMC6121410 DOI: 10.3390/ijms19082266] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 07/21/2018] [Accepted: 07/23/2018] [Indexed: 11/17/2022] Open
Abstract
This study aimed to develop hybrid electrospun chitosan⁻phospholipid nanofibers and investigate the effect of phospholipid (P) content and chitosans (Ch) molecular weights (Mw) and degree of acetylation (DA), on the morphological, mechanical and mucoadhesive properties of the nanofibers. Electrospun Ch/P nanofibers exhibited a smooth and uniform surface with average diameters ranging from 300 to 1000 nm, as observed by scanning electron microscopy (SEM). The average diameter of the nanofibers was observed to increase with the increase of the Mw and degree of deacetylation of Ch, and phospholipid content. The elastic and adhesive properties of the nanofibers were determined by atomic force microscopy, and displayed higher values for higher Mw and lower DA Ch used. The elastic modulus of electrospun Ch/P hybrid fibers determined for the different conditions tested was found to be in the range of 500 and 1400 MPa. Furthermore, electrospun Ch/P nanofibers displayed mucoadhesive properties expressed by the work of adhesion calculated after the compression of the nanofibers against a section of pig small intestine. Our results showed that the increase in phospholipid content and DA of Ch decrease the work of adhesion, while the increase of Mw resulted in slightly higher work of adhesion of the nanofibers.
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Gastric mucus and mucuslike hydrogels: Thin film lubricating properties at soft interfaces. Biointerphases 2017; 12:051001. [DOI: 10.1116/1.5003708] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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