1
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Pan X, Zong Q, Liu C, Wu H, Fu B, Wang Y, Sun W, Zhai Y. Konjac glucomannan exerts regulatory effects on macrophages and its applications in biomedical engineering. Carbohydr Polym 2024; 345:122571. [PMID: 39227106 DOI: 10.1016/j.carbpol.2024.122571] [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: 06/27/2024] [Revised: 07/22/2024] [Accepted: 07/31/2024] [Indexed: 09/05/2024]
Abstract
Konjac glucomannan (KGM) molecular chains contain a small amount of acetyl groups and a large number of hydroxyl groups, thereby exhibiting exceptional water retention and gel-forming properties. To meet diverse requirements, KGM undergoes modification processes such as oxidation, acetylation, grafting, and cationization, which reduce its viscosity, enhance its mechanical strength, and improve its water solubility. Researchers have found that KGM and its derivatives can regulate the polarization of macrophages, inducing their transformation into classically activated M1-type macrophages or alternatively activated M2-type macrophages, and even facilitating the interconversion between M1 and M2 phenotypes. Concurrently, the modulation of macrophage polarization states holds significant importance for chronic wound healing, inflammatory bowel disease (IBD), antitumor therapy, tissue engineering scaffolds, oral vaccines, pulmonary delivery, and probiotics. Therefore, KGM has the advantages of both immunomodulatory effects (biological activity) and gel-forming properties (physicochemical properties), giving it significant advantages in a variety of biomedical engineering applications.
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Affiliation(s)
- Xi Pan
- Department of Pharmaceutics, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Qida Zong
- Department of Pharmaceutics, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Chun Liu
- Hainan Institute for Drug Control, Haikou 570311, China
| | - Huiying Wu
- Department of Pharmaceutics, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Bo Fu
- Department of Pharmaceutics, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Ye Wang
- Department of Pharmaceutics, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Wei Sun
- Department of Biomedical Engineering, School of Pharmaceutical University, Shenyang 110016, China.
| | - Yinglei Zhai
- Department of Biomedical Engineering, School of Pharmaceutical University, Shenyang 110016, China.
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2
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Zhuang K, Shu X, Xie W. Konjac glucomannan-based composite materials: Construction, biomedical applications, and prospects. Carbohydr Polym 2024; 344:122503. [PMID: 39218541 DOI: 10.1016/j.carbpol.2024.122503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 07/04/2024] [Accepted: 07/15/2024] [Indexed: 09/04/2024]
Abstract
Konjac glucomannan (KGM) as an emerging natural polymer has attracted increasing interests owing to its film-forming properties, excellent gelation, non-toxic characteristics, strong adhesion, good biocompatibility, and easy biodegradability. Benefiting from these superior performances, KGM has been widely applied in the construction of multiple composite materials to further improve their intrinsic performances (e.g., mechanical strength and properties). Up to now, KGM-based composite materials have obtained widespread applications in diverse fields, especially in the field of biomedical. Therefore, a timely review of relevant research progresses is important for promoting the development of KGM-based composite materials. Innovatively, firstly, this review briefly introduced the structure properties and functions of KGMs based on the unique perspective of the biomedical field. Then, the latest advances on the preparation and properties of KGM-based composite materials (i.e., gels, microspheres, films, nanofibers, nanoparticles, etc.) were comprehensively summarized. Finally, the promising applications of KGM-based composite materials in the field of biomedical are comprehensively summarized and discussed, involving drug delivery, wound healing, tissue engineering, antibacterial, tumor treatment, etc. Impressively, the remaining challenges and opportunities in this promising field were put forward. This review can provide a reference for guiding and promoting the design and biomedical applications of KGM-based composites.
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Affiliation(s)
- Kejin Zhuang
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, China; Key Laboratory of Agro-products Processing and Quality Safety of Heilongjiang Province, Daqing, China; National Coarse Cereals Engineering Research Center, Daqing, China.
| | - Xin Shu
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Wenjing Xie
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, China
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3
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Pontes JF, Diogo HP, Conceição E, Almeida MP, Borges Dos Santos RM, Grenha A. Development of a dry powder insufflation device with application in in vitro cell-based assays in the context of respiratory delivery. Eur J Pharm Sci 2024; 197:106775. [PMID: 38643941 DOI: 10.1016/j.ejps.2024.106775] [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: 01/19/2024] [Revised: 03/21/2024] [Accepted: 04/15/2024] [Indexed: 04/23/2024]
Abstract
Research on pharmaceutical dry powders has been increasing worldwide, along with increased therapeutic strategies for an application through the pulmonary or the nasal routes. In vitro methodologies and tests that mimic the respiratory environment and the process of inhalation itself are, thus, essential. The literature frequently reports cell-based in vitro assays that involve testing the dry powders in suspension. This experimental setting is not adequate, as both the lung and the nasal cavity are devoid of abundant liquid. However, devices that permit powder insufflation over cells in culture are either scarce or technically complex and expensive, which is not feasible in early stages of research. In this context, this work proposes the development of a device that allows the delivery of dry powders onto cell surfaces, thus simulating inhalation more appropriately. Subsequently, a quartz crystal microbalance (QCM) was used to establish a technique enabling the determination of dry powder deposition profiles. Additionally, the determination of the viability of respiratory cells (A549) after the insufflation of a dry powder using the developed device was performed. In all, a prototype for dry powder insufflation was designed and developed, using 3D printing methods for its production. It allowed the homogenous dispersion of the insufflated powders over a petri dish and a QCM crystal, and a more detailed study on how dry powders disperse over the supports. The device, already protected by a patent, still requires further improvement, especially regarding the method for powder weighing and the efficiency of the insufflation process, which is being addressed. The impact of insufflation of air and of locust bean gum (LBG)-based microparticles revealed absence of cytotoxic effect, as cell viability roughly above 70 % was always determined.
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Affiliation(s)
- Jorge F Pontes
- Centre of Marine Sciences (CCMAR/CIMAR LA), Campus de Gambelas, Universidade do Algarve, 8005-139 Faro, Portugal
| | - Hermínio P Diogo
- University of Lisbon, Instituto Superior Técnico, Centro de Química Estrutural, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Eusébio Conceição
- Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus Gambelas, Faro, 8005-139, Portugal
| | - Maria P Almeida
- Centre of Marine Sciences (CCMAR/CIMAR LA), Campus de Gambelas, Universidade do Algarve, 8005-139 Faro, Portugal; Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus Gambelas, Faro, 8005-139, Portugal
| | - Rui M Borges Dos Santos
- Centre of Marine Sciences (CCMAR/CIMAR LA), Campus de Gambelas, Universidade do Algarve, 8005-139 Faro, Portugal; Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus Gambelas, Faro, 8005-139, Portugal
| | - Ana Grenha
- Centre of Marine Sciences (CCMAR/CIMAR LA), Campus de Gambelas, Universidade do Algarve, 8005-139 Faro, Portugal; Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus Gambelas, Faro, 8005-139, Portugal; Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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4
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Guerreiro F, Pontes JF, Gaspar MM, Rosa da Costa AM, Faleiro ML, Grenha A. Respirable konjac glucomannan microparticles as antitubercular drug carriers: Effects of in vitro and in vivo interactions. Int J Biol Macromol 2023; 248:125838. [PMID: 37455007 DOI: 10.1016/j.ijbiomac.2023.125838] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/07/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
Pulmonary delivery of drugs is potentially beneficial in the context of lung disease, maximising drug concentrations in the site of action. A recent work proposed spray-dried konjac glucomannan (KGM) microparticles as antitubercular drug (isoniazid and rifabutin) carriers to treat pulmonary tuberculosis. The present work explores in vitro and in vivo effects of these microparticles, focusing on the ability for macrophage uptake, the exhibited antibacterial activity and safety issues. Efficient uptake of KGM microparticles by macrophages was demonstrated in vitro, while the antitubercular activity of the model drugs against Mycobacterium bovis was not affected by microencapsulation in KGM microparticles. Despite the good indications provided by the developed system, KGM is not yet approved for pulmonary applications, which is a limiting characteristic. To reinforce the available data on the performance of the material, safety parameters were evaluated both in vitro and in vivo, showing promising results. No significant cell toxicity was observed at concentrations considered realistic for lung delivery approaches (up to 125 μg/mL) when lung epithelial cells and macrophages were exposed to KGM microparticles (both drug-loaded and unloaded). Finally, no signs of systemic or lung inflammatory response were detected in mice after receiving 10 administrations of unloaded KGM microparticles.
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Affiliation(s)
- Filipa Guerreiro
- Centre for Marine Sciences (CCMAR), Universidade do Algarve, 8005-139 Faro, Portugal
| | - Jorge F Pontes
- Centre for Marine Sciences (CCMAR), Universidade do Algarve, 8005-139 Faro, Portugal
| | - Maria Manuela Gaspar
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Ana M Rosa da Costa
- Algarve Chemistry Research Centre (CIQA), Department of Chemistry and Pharmacy, Universidade do Algarve, 8005-139 Faro, Portugal
| | - Maria Leonor Faleiro
- Algarve Biomedical Center (ABC), Research Institute, Universidade do Algarve, 8005-139 Faro, Portugal; Champalimaud Research Program, Champalimaud Centre for the Unknown, Lisboa, Portugal
| | - Ana Grenha
- Centre for Marine Sciences (CCMAR), Universidade do Algarve, 8005-139 Faro, Portugal; Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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Shi W, Wu J, Pi Y, Yan X, Hu X, Cheng J, Yu H, Shao Z. E7 Peptide Enables BMSC Adhesion and Promotes Chondrogenic Differentiation of BMSCs Via the LncRNA H19/miR675 Axis. Bioengineering (Basel) 2023; 10:781. [PMID: 37508808 PMCID: PMC10376115 DOI: 10.3390/bioengineering10070781] [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: 05/09/2023] [Revised: 06/25/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
Therapeutic strategies based on utilizing endogenous BMSCs have been developed for the regeneration of bone, cartilage, and ligaments. We previously found that E7 peptide (EPLQLKM) could enhance BMSC homing in bio-scaffolds and, therefore, promote cartilage regeneration. However, the profile and mechanisms of E7 peptide in cartilage regeneration remain elusive. In this study, we examined the effect of E7 peptide on the BMSC phenotype, including adhesion, viability and chondrogenic differentiation, and its underlying mechanism. The konjac glucomannan microsphere (KGM), a carrier material that is free of BMSC adhesion ability, was used as the solid base of E7 peptide to better explore the independent role of E7 peptide in BMSC behavior. The results showed that E7 peptide could support BMSC adhesion and viability in a comparable manner to RGD and promote superior chondrogenic differentiation to RGD. We examined differentially expressed genes of BMSCs induced by E7 compared to RGD. Subsequently, a real-time PCR validated the significantly upregulated expression of lncRNA H19, and the knockdown of lncRNA H19 or miR675, a downstream functional unit of H19, could significantly obscure the chondrogenic differentiation induced by E7. In conclusion, this study confirmed the independent role of E7 in the adhesion and viability of BMSCs and revealed the pro-chondrogenic effect of E7 on BMSCs via the H19/miR675 axis. These results could help establish new therapeutic strategies based on employing endogenous BMSCs for cartilage tissue regeneration.
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Affiliation(s)
- Weili Shi
- Peking University Third Hospital, Beijing Key Laboratory of Sports Injuries, Department of Sports Medicine, Institute of Sports Medicine of Peking University, Beijing 100191, China
| | - Jiangyi Wu
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, China
| | - Yanbin Pi
- Peking University Third Hospital, Beijing Key Laboratory of Sports Injuries, Department of Sports Medicine, Institute of Sports Medicine of Peking University, Beijing 100191, China
| | - Xingran Yan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoqing Hu
- Peking University Third Hospital, Beijing Key Laboratory of Sports Injuries, Department of Sports Medicine, Institute of Sports Medicine of Peking University, Beijing 100191, China
| | - Jin Cheng
- Peking University Third Hospital, Beijing Key Laboratory of Sports Injuries, Department of Sports Medicine, Institute of Sports Medicine of Peking University, Beijing 100191, China
| | - Huilei Yu
- Peking University Third Hospital, Beijing Key Laboratory of Sports Injuries, Department of Sports Medicine, Institute of Sports Medicine of Peking University, Beijing 100191, China
| | - Zhenxing Shao
- Peking University Third Hospital, Beijing Key Laboratory of Sports Injuries, Department of Sports Medicine, Institute of Sports Medicine of Peking University, Beijing 100191, China
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Ferreira-Anta T, Torres MD, Dominguez H, Flórez-Fernández N. Formulation of Polymeric Microparticles Using Eco-Friendly Extracted Crude Fucoidans from Edible Brown Seaweed Undaria pinnatifida. Foods 2023; 12:foods12091859. [PMID: 37174397 PMCID: PMC10178044 DOI: 10.3390/foods12091859] [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: 03/31/2023] [Revised: 04/24/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
Several bioactive compounds that hold a potential interest in the food industry as phenolic compounds, polysaccharides, proteins and vitamins, among others, are present in seaweeds. Green extraction technologies are the preferred way to obtain these compounds. Pressurized hot water extraction, from 160 to 220 °C, was tested to achieve high yields of these components from the edible brown seaweed, Undaria pinnatifida. The maximum fucoidan content was recovered at 160 °C, while the phloroglucinol content and antioxidant activity were maximum at 220 °C. The possibility of encapsulating these bioactive fractions using mannitol was assessed. The highest production yield of the polymeric particles was found using the 220 °C fraction (close to 75%). In order to formulate microparticles with bioactive potential, several ratios of liquid phases were assessed, 3:1, 1:1 and 1:3 (w:w), using the liquid fractions obtained at 160 °C and 220 °C. The yield production was always above 67%, being in the 1:3 ratio (160 °C:220 °C) and close to 75%. The rheological results indicated that the presence of microparticles enhanced the apparent viscosity of the aqueous dispersions with non-Newtonian profiles, achieving the highest viscosity for those formulated with microparticles from 160 °C:200 °C (3:1).
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Affiliation(s)
- Tania Ferreira-Anta
- CINBIO, Department of Chemical Engineering, Campus Ourense, Edificio Politécnico, Universidad de Vigo, As Lagoas, 32004 Ourense, Spain
| | - Maria Dolores Torres
- CINBIO, Department of Chemical Engineering, Campus Ourense, Edificio Politécnico, Universidad de Vigo, As Lagoas, 32004 Ourense, Spain
| | - Herminia Dominguez
- CINBIO, Department of Chemical Engineering, Campus Ourense, Edificio Politécnico, Universidad de Vigo, As Lagoas, 32004 Ourense, Spain
| | - Noelia Flórez-Fernández
- CINBIO, Department of Chemical Engineering, Campus Ourense, Edificio Politécnico, Universidad de Vigo, As Lagoas, 32004 Ourense, Spain
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7
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Sun Y, Xu X, Zhang Q, Zhang D, Xie X, Zhou H, Wu Z, Liu R, Pang J. Review of Konjac Glucomannan Structure, Properties, Gelation Mechanism, and Application in Medical Biology. Polymers (Basel) 2023; 15:polym15081852. [PMID: 37111999 PMCID: PMC10145206 DOI: 10.3390/polym15081852] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/07/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
Konjac glucomannan (KGM) is a naturally occurring macromolecular polysaccharide that exhibits remarkable film-forming and gel-forming properties, and a high degree of biocompatibility and biodegradability. The helical structure of KGM is maintained by the acetyl group, which plays a crucial role in preserving its structural integrity. Various degradation methods, including the topological structure, can enhance the stability of KGM and improve its biological activity. Recent research has focused on modifying KGM to enhance its properties, utilizing multi-scale simulation, mechanical experiments, and biosensor research. This review presents a comprehensive overview of the structure and properties of KGM, recent advancements in non-alkali thermally irreversible gel research, and its applications in biomedical materials and related areas of research. Additionally, this review outlines prospects for future KGM research, providing valuable research ideas for follow-up experiments.
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Affiliation(s)
- Yilan Sun
- Center for Agroforestry Mega Data Science, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiaowei Xu
- College of Food Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Qinhua Zhang
- College of Food Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Di Zhang
- College of Food Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiaoyu Xie
- College of Food Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hanlin Zhou
- College of Food Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhenzhen Wu
- College of Food Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Renyi Liu
- Center for Agroforestry Mega Data Science, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jie Pang
- College of Food Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Lokhande AS, Panchal F, Munshi R, Madkaikar M, Malshe VC, Devarajan PV. pH-responsive microparticles of rifampicin for augmented intramacrophage uptake and enhanced antitubercular efficacy. Int J Pharm 2023; 635:122729. [PMID: 36803923 DOI: 10.1016/j.ijpharm.2023.122729] [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: 11/04/2022] [Revised: 02/10/2023] [Accepted: 02/12/2023] [Indexed: 02/17/2023]
Abstract
In this study we present pH-responsive rifampicin (RIF) microparticles comprising lecithin and a biodegradable hydrophobic polymer, polyethylene sebacate (PES), to achieve high intramacrophage delivery and enhanced antitubercular efficacy. PES and PES-lecithin combination microparticles (PL MPs) prepared by single step precipitation revealed average size of 1.5 to 2.7 µm, entrapment efficiency ∼ 60 %, drug loading 12-15 % and negative zeta potential. Increase in lecithin concentration enhanced hydrophilicity. PES MPs demonstrated faster release in simulated lung fluid pH 7.4, while lecithin MPs facilitated faster and concentration dependent release in acidic artificial lysosomal fluid (ALF) pH 4.5 due to swelling and destabilization confirmed by TEM. PES and PL (1:2) MPs exhibited comparable macrophage uptake which was ∼ 5-fold superior than free RIF, in the RAW 264.7 macrophage cells. Confocal microscopy depicted intensified accumulation of the MPs in the lysosomal compartment, with augmented release of coumarin dye from the PL MPs, confirming pH-triggered increased intracellular release. Although, PES MPs and PL (1:2) MPs displayed comparable and high macrophage uptake, antitubercular efficacy against macrophage internalised M. tuberculosis was significantly higher with PL (1:2) MPs. This suggested great promise of the pH-sensitive PL (1:2) MPs for enhanced antitubercular efficacy.
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Affiliation(s)
- Amit S Lokhande
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai 400019, Maharashtra, India
| | - Falguni Panchal
- Department of Clinical Pharmacology, Topiwala National Medical College and B. Y. L. Nair Charitable Hospital, Dr A. L. Nair Road, Mumbai Central, Mumbai 400008, Maharashtra, India
| | - Renuka Munshi
- Department of Clinical Pharmacology, Topiwala National Medical College and B. Y. L. Nair Charitable Hospital, Dr A. L. Nair Road, Mumbai Central, Mumbai 400008, Maharashtra, India
| | - Manisha Madkaikar
- Department of Paediatric Immunology and Leukemia Biology, ICMR-National Institute of Immunohaematology, KEM Hospital campus, Parel, Mumbai 400012, Maharashtra, India
| | - Vinod C Malshe
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai 400019, Maharashtra, India
| | - Padma V Devarajan
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai 400019, Maharashtra, India.
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9
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Zhang X, Tian Y, Xing J, Wang Q, Liang Y, Wang J. Effect of konjac glucomannan on aggregation patterns and structure of wheat gluten with different strengths. Food Chem 2023; 417:135902. [PMID: 36906944 DOI: 10.1016/j.foodchem.2023.135902] [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: 06/28/2022] [Revised: 01/08/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023]
Abstract
Konjac glucomannan (KGM) can act as a food additive to improve the quality of dough. The effects of KGM on the aggregation patterns and structural properties of weak, middle, and strong gluten were studied. We found that with a higher proportion of KGM substitution (10%), the aggregation energy of middle and strong gluten became lower than the control samples, while exceeding the control for weak gluten. With 10% KGM, aggregation of glutenin macropolymer (GMP) was enhanced for weak gluten, but suppressed for middle and strong gluten. The α-helix transferred to β-sheet in weak, but caused more random-coil structures for middle and strong gluten induced by 10% KGM. With 10% KGM, the network for weak gluten became more continuous, but severely disrupted for middle and strong gluten. Thus, KGM has distinct effects on weak, middle, and strong gluten, which related to the alteration of gluten secondary structures and GMP aggregation pattern.
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Affiliation(s)
- Xia Zhang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China
| | - Yu Tian
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China
| | - Jinjin Xing
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China
| | - Qi Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China
| | - Ying Liang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China
| | - Jinshui Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.
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10
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Naz FF, Shah KU, Niazi ZR, Zaman M, Lim V, Alfatama M. Polymeric Microparticles: Synthesis, Characterization and In Vitro Evaluation for Pulmonary Delivery of Rifampicin. Polymers (Basel) 2022; 14:2491. [PMID: 35746067 PMCID: PMC9230634 DOI: 10.3390/polym14122491] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/13/2022] [Accepted: 06/15/2022] [Indexed: 12/10/2022] Open
Abstract
Rifampicin, a potent broad-spectrum antibiotic, remains the backbone of anti-tubercular therapy. However, it can cause severe hepatotoxicity when given orally. To overcome the limitations of the current oral therapy, this study designed inhalable spray-dried, rifampicin-loaded microparticles using aloe vera powder as an immune modulator, with varying concentrations of alginate and L-leucine. The microparticles were assessed for their physicochemical properties, in vitro drug release and aerodynamic behavior. The spray-dried powders were 2 to 4 µm in size with a percentage yield of 45 to 65%. The particles were nearly spherical with the tendency of agglomeration as depicted from Carr’s index (37 to 65) and Hausner’s ratios (>1.50). The drug content ranged from 0.24 to 0.39 mg/mg, with an association efficiency of 39.28 to 96.15%. The dissolution data depicts that the in vitro release of rifampicin from microparticles was significantly retarded with a higher L-leucine concentration in comparison to those formulations containing a higher sodium alginate concentration due to its hydrophobic nature. The aerodynamic data depicts that 60 to 70% of the aerosol mass was emitted from an inhaler with MMAD values of 1.44 to 1.60 µm and FPF of 43.22 to 55.70%. The higher FPF values with retarded in vitro release could allow sufficient time for the phagocytosis of synthesized microparticles by alveolar macrophages, thereby leading to the eradication of M. tuberculosis from these cells.
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Affiliation(s)
- Faiqa Falak Naz
- Faculty of Pharmacy, Gomal University, Dera Ismail Khan 29050, Pakistan; (F.F.N.); (K.U.S.); (Z.R.N.); (M.Z.)
| | - Kifayat Ullah Shah
- Faculty of Pharmacy, Gomal University, Dera Ismail Khan 29050, Pakistan; (F.F.N.); (K.U.S.); (Z.R.N.); (M.Z.)
| | - Zahid Rasul Niazi
- Faculty of Pharmacy, Gomal University, Dera Ismail Khan 29050, Pakistan; (F.F.N.); (K.U.S.); (Z.R.N.); (M.Z.)
| | - Mansoor Zaman
- Faculty of Pharmacy, Gomal University, Dera Ismail Khan 29050, Pakistan; (F.F.N.); (K.U.S.); (Z.R.N.); (M.Z.)
| | - Vuanghao Lim
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, Kepala Batas 13200, Penang, Malaysia
| | - Mulham Alfatama
- Faculty of Pharmacy, Universiti Sultan Zainal Abidin, Besut Campus, Besut 22200, Terengganu, Malaysia
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Czechtizky W, Su W, Ripa L, Schiesser S, Höijer A, Cox RJ. Advances in the design of new types of inhaled medicines. PROGRESS IN MEDICINAL CHEMISTRY 2022; 61:93-162. [PMID: 35753716 DOI: 10.1016/bs.pmch.2022.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Inhalation of small molecule drugs has proven very efficacious for the treatment of respiratory diseases due to enhanced efficacy and a favourable therapeutic index compared with other dosing routes. It enables targeted delivery to the lung with rapid onset of therapeutic action, low systemic drug exposure, and thereby reduced systemic side effects. An increasing number of pharmaceutical companies and biotechs are investing in new modalities-for this review defined as therapeutic molecules with a molecular weight >800Da and therefore beyond usual inhaled small molecule drug-like space. However, our experience with inhaled administration of PROTACs, peptides, oligonucleotides (antisense oligonucleotides, siRNAs, miRs and antagomirs), diverse protein scaffolds, antibodies and antibody fragments is still limited. Investigating the retention and metabolism of these types of molecules in lung tissue and fluid will contribute to understanding which are best suited for inhalation. Nonetheless, the first such therapeutic molecules have already reached the clinic. This review will provide information on the physiology of healthy and diseased lungs and their capacity for drug metabolism. It will outline the stability, aggregation and immunogenicity aspects of new modalities, as well as recap on formulation and delivery aspects. It concludes by summarising clinical trial outcomes with inhaled new modalities based on information available at the end of 2021.
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Affiliation(s)
- Werngard Czechtizky
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden.
| | - Wu Su
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Lena Ripa
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Stefan Schiesser
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Andreas Höijer
- Cardiovascular, Renal & Metabolism CMC Projects, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Rhona J Cox
- Department of Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal & Metabolism, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
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12
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Shen F, Chen C, Chen W, Liu Q, Chen C, Xiao G, Liu Y, Zhou J. Ultra-Light GO@KGM Aerogels for Oil-Water Separation Based on CVD Modification. ACS OMEGA 2022; 7:13354-13361. [PMID: 35474793 PMCID: PMC9026091 DOI: 10.1021/acsomega.2c01080] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 03/24/2022] [Indexed: 05/22/2023]
Abstract
Nowadays, oil pollution of water caused by illegal discharges or accidental events occurs frequently, and the waste of resources and environmental pollution cannot be ignored, so effective oil-water separation methods are needed to cope with such incidents. To solve these problems, this paper investigated an aerogel made from a plant polysaccharide, konjac glucomannan (KGM), supplemented with graphene oxide (GO), to improve the mechanical properties. Finally, a hydrophobic layer was attached to the surface and interior of the aerogel via chemical vapor deposition to improve its selectivity toward oil. Through a series of characterization methods such as infrared, X-ray photoelectron spectroscopy, and X-ray diffraction, it was demonstrated that KGM and GO were successfully cross-linked, resulting in excellent mechanical properties and directional absorption properties on oil. This composite polysaccharide aerogel could absorb oil 48 times its own weight. In addition, due to its strong mechanical properties, the gel can be reused many times, and the maximum recovery rate can be maintained at 96% after 10 cycles. Furthermore, the absorption of oil from water was conducted in a continuous mode, demonstrating the diversity of application scenarios. Generally, the results observed in this work have shown that the KGM aerogels have great potential for applications in oil-water separation.
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Affiliation(s)
- Fangyuan Shen
- College
of Chemistry and Chemical Engineering, Southwest
Petroleum University, Xindu Avenue 8th, Chengdu, Sichuan CN 610500, China
| | - Chunyan Chen
- College
of Chemistry and Chemical Engineering, Southwest
Petroleum University, Xindu Avenue 8th, Chengdu, Sichuan CN 610500, China
| | - Wanxin Chen
- College
of Chemistry and Chemical Engineering, Southwest
Petroleum University, Xindu Avenue 8th, Chengdu, Sichuan CN 610500, China
| | - Qian Liu
- College
of Chemistry and Chemical Engineering, Southwest
Petroleum University, Xindu Avenue 8th, Chengdu, Sichuan CN 610500, China
| | - Chunlin Chen
- College
of Chemistry and Chemical Engineering, Southwest
Petroleum University, Xindu Avenue 8th, Chengdu, Sichuan CN 610500, China
| | - Guoqing Xiao
- College
of Chemistry and Chemical Engineering, Southwest
Petroleum University, Xindu Avenue 8th, Chengdu, Sichuan CN 610500, China
- Oil
& Gas Fire Protection Key Laboratory of Sichuan Province, Chengdu, Sichuan CN611731, China
- Southwest
Petr University, State Key Lab Oil &
Gas Reservoir Geol & Exploita, Chengdu, Sichuan CN610500, China
| | - Yuheng Liu
- College
of Chemistry and Chemical Engineering, Southwest
Petroleum University, Xindu Avenue 8th, Chengdu, Sichuan CN 610500, China
| | - Jian Zhou
- Key
Laboratory for Harmful Components and Tar Reduction in Cigarette of
Sichuan Province, Chengdu, Sichuan CN610000, China
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Cheng H, Lu C, Xu G, Zhao L, Lu M, Wang Y. Optimization of Spray-Drying Process Parameters to Study Anti-Sticking Effect of Hydroxypropyl Methyl Cellulose-VLV on Corni fructus Extracts. AAPS PharmSciTech 2022; 23:58. [PMID: 35059874 DOI: 10.1208/s12249-022-02215-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/07/2022] [Indexed: 11/30/2022] Open
Abstract
To prevent the sticking of Corni fructus extract (CFE) during spray drying, the anti-sticking effects of different excipients were compared. Hydroxypropyl methylcellulose (HPMC)-VLV showed a higher powder yield at a lower dosage (8% of total solids), and a lower solution viscosity, compared with HPMC-E5. Therefore, HPMC-VLV is a more effective excipient for reducing CFE sticking during spray drying. The spray-drying process parameters were optimized by central composite rotatable design/response surface methodology, and spray drying was conducted under the following conditions: Inlet air temperature, 126 °C; atomization pressure, 1.05 bar; pump speed, 7.7 mL/min. Scanning electron microscopy showed that the powder comprised shrunken spherical particles with particle sizes in the range of 2-30 μm. Analysis of dynamic surface tension and chemical elements on the powder surface showed that HPMC-VLV rapidly moved to the droplet surface owing to its surface activity. HPMC covered the droplet surface and reduced surface tension, achieving an anti-sticking effect. In conclusion, HPMC-VLV at a solid content of 8% significantly improved the spray drying and reduced sticking of CFE. The spray-drying process parameters were nonlinearly related to the dry product yield. Graphical Abstract.
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