101
|
Pei X, Lei Y, Zhang H. Transcriptional regulators of secondary metabolite biosynthesis in Streptomyces. World J Microbiol Biotechnol 2024; 40:156. [PMID: 38587708 DOI: 10.1007/s11274-024-03968-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 03/25/2024] [Indexed: 04/09/2024]
Abstract
In the post-genome era, great progress has been made in metabolic engineering using recombinant DNA technology to enhance the production of high-value products by Streptomyces. With the development of microbial genome sequencing techniques and bioinformatic tools, a growing number of secondary metabolite (SM) biosynthetic gene clusters in Streptomyces and their biosynthetic logics have been uncovered and elucidated. In order to increase our knowledge about transcriptional regulators in SM of Streptomyces, this review firstly makes a comprehensive summary of the characterized factors involved in enhancing SM production and awakening SM biosynthesis. Future perspectives on transcriptional regulator engineering for new SM biosynthesis by Streptomyces are also provided.
Collapse
Affiliation(s)
- Xinwei Pei
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yunyun Lei
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Huawei Zhang
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China.
| |
Collapse
|
102
|
Duan Y, He K, Lan W, Luo Y, Fan H, Lin P, Wang W, Tang Y. Noninvasive Assessment of hiPSC Differentiation toward Cardiomyocytes Using Pretrained Convolutional Neural Networks and the Channel Pruning Algorithm. ACS Biomater Sci Eng 2024; 10:2498-2509. [PMID: 38531866 DOI: 10.1021/acsbiomaterials.3c01938] [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] [Indexed: 03/28/2024]
Abstract
Human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes (hiPSC-CMs) offer versatile applications in tissue engineering and drug screening. To facilitate the monitoring of hiPSC cardiac differentiation, a noninvasive approach using convolutional neural networks (CNNs) was explored. HiPSCs were differentiated into cardiomyocytes and analyzed using the quantitative real-time polymerase chain reaction (qRT-PCR). The bright-field images of the cells at different time points were captured to create the dataset. Six pretrained models (AlexNet, GoogleNet, ResNet 18, ResNet 50, DenseNet 121, VGG 19-BN) were employed to identify different stages in differentiation. VGG 19-BN outperformed the other five CNNs and exhibited remarkable performance with 99.2% accuracy, recall, precision, and F1 score and 99.8% specificity. The pruning process was then applied to the optimal model, resulting in a significant reduction of model parameters while maintaining high accuracy. Finally, an automation application using the pruned VGG 19-BN model was developed, facilitating users in assessing the cell status during the myocardial differentiation of hiPSCs.
Collapse
Affiliation(s)
- Yujie Duan
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Kaitong He
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Wei Lan
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Yuli Luo
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Hao Fan
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Peiran Lin
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Wenlong Wang
- School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou 510006, China
| | - Yadong Tang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| |
Collapse
|
103
|
Shirk BD, Torres Pereira Meriade Duarte I, McTyer JB, Eccles LE, Lateef AH, Shirk PD, Stoppel WL. Harvesting Silk Fibers from Plodia interpunctella: Role of Environmental Rearing Conditions in Fiber Production and Properties. ACS Biomater Sci Eng 2024; 10:2088-2099. [PMID: 38427786 DOI: 10.1021/acsbiomaterials.3c01372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
Silk fibers are produced by a wide variety of insects. The silkworm Bombyx mori (Bombyx) was domesticated because the physical properties of its silk fibers were amenable to the production of fine textiles. Subsequently, engineers have regenerated silk fibroin to form biomaterials. The monocular focus on Bombyx silk has underutilized the expanse of diverse silk proteins produced by more than 100,000 other arthropods. This vast array of silk fibers could be utilized for biomedical engineering challenges if sufficient rearing and purification processes are developed. Herein, we show that the moth, Plodia interpunctella (Plodia), represents an alternative silk source that is easily reared in highly regulated culture environments allowing for greater consistency in the silk produced. We controlled the temperature, resource availability (larvae/gram diet), and population density (larvae/mL) with the goal of increasing silk fiber production and improving homogeneity in Plodia silk proteins. We determined that higher temperatures accelerated insect growth and reduced life cycle length. Furthermore, we established initial protocols for the production of Plodia silk with optimal silk production occurring at 24 °C, with a resource availability of 10 larvae/gram and a population density of 0.72 larvae/mL. Population density was shown to be the most prominent driving force of Plodia silk mat formation among the three parameters assessed. Future work will need to link gene expression, protein production and purification, and resulting mechanical properties as a function of environmental cues to further transition Plodia silk into regenerated silk fibroin biomaterials.
Collapse
Affiliation(s)
- Bryce D Shirk
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | | | - Jasmine B McTyer
- Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Lauren E Eccles
- Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Ali H Lateef
- Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Paul D Shirk
- Entomology and Nematology, University of Florida, Gainesville, Florida 32611, United States
| | - Whitney L Stoppel
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida 32611, United States
- Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| |
Collapse
|
104
|
Das S, Jegadeesan JT, Basu B. Gelatin Methacryloyl (GelMA)-Based Biomaterial Inks: Process Science for 3D/4D Printing and Current Status. Biomacromolecules 2024; 25:2156-2221. [PMID: 38507816 DOI: 10.1021/acs.biomac.3c01271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Tissue engineering for injured tissue replacement and regeneration has been a subject of investigation over the last 30 years, and there has been considerable interest in using additive manufacturing to achieve these goals. Despite such efforts, many key questions remain unanswered, particularly in the area of biomaterial selection for these applications as well as quantitative understanding of the process science. The strategic utilization of biological macromolecules provides a versatile approach to meet diverse requirements in 3D printing, such as printability, buildability, and biocompatibility. These molecules play a pivotal role in both physical and chemical cross-linking processes throughout the biofabrication, contributing significantly to the overall success of the 3D printing process. Among the several bioprintable materials, gelatin methacryloyl (GelMA) has been widely utilized for diverse tissue engineering applications, with some degree of success. In this context, this review will discuss the key bioengineering approaches to identify the gelation and cross-linking strategies that are appropriate to control the rheology, printability, and buildability of biomaterial inks. This review will focus on the GelMA as the structural (scaffold) biomaterial for different tissues and as a potential carrier vehicle for the transport of living cells as well as their maintenance and viability in the physiological system. Recognizing the importance of printability toward shape fidelity and biophysical properties, a major focus in this review has been to discuss the qualitative and quantitative impact of the key factors, including microrheological, viscoelastic, gelation, shear thinning properties of biomaterial inks, and printing parameters, in particular, reference to 3D extrusion printing of GelMA-based biomaterial inks. Specifically, we emphasize the different possibilities to regulate mechanical, swelling, biodegradation, and cellular functionalities of GelMA-based bio(material) inks, by hybridization techniques, including different synthetic and natural biopolymers, inorganic nanofillers, and microcarriers. At the close, the potential possibility of the integration of experimental data sets and artificial intelligence/machine learning approaches is emphasized to predict the printability, shape fidelity, or biophysical properties of GelMA bio(material) inks for clinically relevant tissues.
Collapse
Affiliation(s)
- Soumitra Das
- Materials Research Centre, Indian Institute of Science, Bangalore, India 560012
| | | | - Bikramjit Basu
- Materials Research Centre, Indian Institute of Science, Bangalore, India 560012
| |
Collapse
|
105
|
Pal P, Sambhakar S, Paliwal S, Kumar S, Kalsi V. Biofabrication paradigms in corneal regeneration: bridging bioprinting techniques, natural bioinks, and stem cell therapeutics. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:717-755. [PMID: 38214998 DOI: 10.1080/09205063.2024.2301817] [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: 10/21/2023] [Accepted: 12/29/2023] [Indexed: 01/14/2024]
Abstract
Corneal diseases are a major cause of vision loss worldwide. Traditional methods like corneal transplants from donors are effective but face challenges like limited donor availability and the risk of graft rejection. Therefore, new treatment methods are essential. This review examines the growing field of bioprinting and biofabrication in corneal tissue engineering. We begin by discussing various bioprinting methods such as stereolithography, inkjet, and extrusion printing, highlighting their strengths and weaknesses for eye-related uses. We also explore how biological tissues are made suitable for bioprinting through a process called decellularization, which can be achieved using chemical, physical, or biological methods. The review then looks at natural materials, known as bioinks, used in bioprinting. We focus on materials like gelatin, collagen, fibrin, chitin, chitosan, silk fibroin, and alginate, examining their mechanical and biological properties. The importance of hydrogel scaffolds, particularly those based on collagen and other materials, is also discussed in the context of repairing corneal tissue. Another key area we cover is the use of stem cells in corneal regeneration. We pay special attention to limbal epithelial stem cells and mesenchymal stromal cells, highlighting their roles in this process. The review concludes with an overview of the latest advancements in corneal tissue bioprinting, from early techniques to advanced methods of delivering stem cells using bioengineered materials. In summary, this review presents the current state and future potential of bioprinting and biofabrication in creating functional corneal tissues, highlighting new developments and ongoing challenges with a view towards restoring vision.
Collapse
Affiliation(s)
- Pankaj Pal
- Department of Pharmacy, Banasthali Vidyapith, Radha Kishnpura, Rajasthan, India
| | - Sharda Sambhakar
- Department of Pharmacy, Banasthali Vidyapith, Radha Kishnpura, Rajasthan, India
| | - Shailendra Paliwal
- Department of Pharmacy, L.L.R.M Medical College, Meerut, Uttar Pradesh, India
| | - Shobhit Kumar
- Department of Pharmaceutical Technology, Meerut Institute of Engineering and Technology, Meerut, Uttar Pradesh, India
| | - Vandna Kalsi
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
| |
Collapse
|
106
|
Mofazali P, Atapour M, Nakamura M, Sheikholeslam M, Galati M, Saboori A. Surface modification of additive manufactured Ti6Al4V scaffolds with gelatin/alginate- IGF-1 carrier: An effective approach for healing bone defects. Int J Biol Macromol 2024; 265:131125. [PMID: 38527675 DOI: 10.1016/j.ijbiomac.2024.131125] [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: 11/02/2023] [Revised: 03/16/2024] [Accepted: 03/22/2024] [Indexed: 03/27/2024]
Abstract
The study investigates the potential of porous scaffolds with Gel/Alg-IGF-1 coatings as a viable candidate for orthopaedic implants. The scaffolds are composed of additively manufactured Ti6Al4V lattices, which were treated in an alkali solution to obtain the anatase and rutile phases. The treated surface exhibited hydrophilicity of <11.5°. A biopolymer carrier containing Insulin-like growth factor 1 was coated on the samples using immersion treatment. This study showed that the surface-modified porous Ti6Al4V scaffolds increased cell viability and proliferation, indicating potential for bone regeneration. The results demonstrate that surface modifications can enhance the osteoconduction and osteoinduction of Ti6Al4V implants, leading to improved bone regeneration and faster recovery. The porous Ti6Al4V scaffolds modified with surface coating of Gel/Alg-IGF-1 exhibited a noteworthy increase in cell viability (from 80.7 to 104.1%viability) and proliferation. These results suggest that the surface modified scaffolds have potential for use in treating bone defects.
Collapse
Affiliation(s)
- Parinaz Mofazali
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Masoud Atapour
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Miho Nakamura
- Medicity Research Laboratory, Faculty of Medicine, University of Turku Tykistökatu 6, 20520 Turku, Finland
| | - Mohammadali Sheikholeslam
- Department of Biomaterials, Nanotechnology and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Science, Isfahan, Iran
| | - Manuela Galati
- Integrated Additive Manufacturing Center (IAM), Department of Management and Production Engineering, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Turino, Italy
| | - Abdollah Saboori
- Integrated Additive Manufacturing Center (IAM), Department of Management and Production Engineering, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Turino, Italy
| |
Collapse
|
107
|
Daly K, Ball C, Thomas H, Krishnen R. Improved in vitro wound healing in response to a superoxidised solution. J Wound Care 2024; 33:S4-S13. [PMID: 38573949 DOI: 10.12968/jowc.2024.33.sup4.s4] [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] [Indexed: 04/06/2024]
Abstract
OBJECTIVE This study assessed wound healing in response to a superoxidised solution using an in vitro wound healing model. METHOD Prewounded reconstructed full-thickness human skin models were treated with 10µl of either superoxidised solution (Hydrocyn aqua, Bactiguard South East Asia Sdn. Bhd., Malaysia) or Dulbecco's phosphate buffered saline (DPBS) and incubated at 37°C for up to seven days, with additional treatments added every 48 hours. On days 0, 1, 2, 5 and 7, triplicate samples were taken for specific immunostaining against cytokeratin 14 and vimentin. At each timepoint, horizontal and vertical wound diameters were measured to demonstrate wound closure. Maintenance media was taken at the same timepoints for the measurement of secreted proinflammatory cytokines interleukin (IL)-1β, IL-6 and tumour necrosis factor (TNF)-ɑ. RESULTS At day 1, the superoxidised solution induced significantly lower diameter measurements compared with baseline data at day 0. Both treatment groups demonstrated significantly lower diameter measurements by day 2 when compared with the baseline; however, the average wound size of samples treated with the superoxidised solution was significantly lower when compared to the DPBS-treated group (p<0.05). No significant difference in expression of any proinflammatory was identified at any timepoint. CONCLUSION Application of the superoxidised solution resulted in significantly improved wound closure over the first 48 hours in comparison to DPBS-treatment. Furthermore, application of the superoxidised solution did not induce significant proinflammatory effects, despite the significantly reduced wound diameter.
Collapse
Affiliation(s)
- Kristian Daly
- NAMSA, Techspace One SciTech Daresbury, Cheshire, UK
| | | | - Hannah Thomas
- NAMSA, Techspace One SciTech Daresbury, Cheshire, UK
| | - Ranjeni Krishnen
- Bactiguard South East Asia Sdn. Bhd, Simpang Ampat, 14100, Malaysia
| |
Collapse
|
108
|
Tajvidi Safa B, Huang C, Kabla A, Yang R. Active viscoelastic models for cell and tissue mechanics. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231074. [PMID: 38660600 PMCID: PMC11040246 DOI: 10.1098/rsos.231074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 02/01/2024] [Accepted: 02/25/2024] [Indexed: 04/26/2024]
Abstract
Living cells are out of equilibrium active materials. Cell-generated forces are transmitted across the cytoskeleton network and to the extracellular environment. These active force interactions shape cellular mechanical behaviour, trigger mechano-sensing, regulate cell adaptation to the microenvironment and can affect disease outcomes. In recent years, the mechanobiology community has witnessed the emergence of many experimental and theoretical approaches to study cells as mechanically active materials. In this review, we highlight recent advancements in incorporating active characteristics of cellular behaviour at different length scales into classic viscoelastic models by either adding an active tension-generating element or adjusting the resting length of an elastic element in the model. Summarizing the two groups of approaches, we will review the formulation and application of these models to understand cellular adaptation mechanisms in response to various types of mechanical stimuli, such as the effect of extracellular matrix properties and external loadings or deformations.
Collapse
Affiliation(s)
- Bahareh Tajvidi Safa
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE68588, USA
| | - Changjin Huang
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore639798, Singapore
| | - Alexandre Kabla
- Department of Engineering, University of Cambridge, CambridgeCB2 1PZ, UK
| | - Ruiguo Yang
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE68588, USA
- Department of Biomedical Engineering, Michigan State University, East Lansing, MI48824, USA
- Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, MI48824, USA
| |
Collapse
|
109
|
Xia X, Pan Z, Qiu H, Xie X, Guo K. Effect of geomembrane liner on landfill stability under long-term loading: interfacial shear test and numerical simulation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:27345-27355. [PMID: 38512575 DOI: 10.1007/s11356-024-32953-3] [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: 10/23/2023] [Accepted: 03/12/2024] [Indexed: 03/23/2024]
Abstract
Clay liners have been widely used in landfill engineering. However, large-scale clay excavation causes secondary environmental damage. This study investigates the feasibility of replacing clay liners with high-density polyethylene (HDPE) geomembranes with different specifications and parameters. Laboratory interface shear tests between municipal solid waste (MSW) samples of different ages and geomembranes were conducted to study the influence of landfill age on interface shear strength. Finite element method was adopted to compare the long-term stability of landfills with HDPE geomembrane versus clay as intermediate liner. The interfacial shear test results show that the cohesion of MSW increases in a short term and then decreases with landfill age. The internal friction angle exhibits an increasing trend with advancing age, however, the rate of its increment declines with age. The rough accuracy of the film surface can increase the interfacial shear strength between MSW. The simulation results show that, unlike clay-lined landfills, the sliding surface of geomembrane-lined landfills is discontinuous at the lining interface, which can delay the penetration of slip surfaces and block the formation of slip zone in the landfill. In addition, the maximum displacement of landfills with geomembrane is 10% lower than that with clay, and the absolute displacement of slope toe decreases with the increase of roughness at the interface of geomembrane. Compared with clay-lined landfills, the overall stability safety factor increased by 18.5-30%. This study provides references for landfill design and on-site stability evaluation, contributing to enhanced long-term stability.
Collapse
Affiliation(s)
- Xiong Xia
- School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China
- School of Urban Construction, Changzhou University, Changzhou, 213164, China
| | - Ziqing Pan
- School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China.
| | - Hongyong Qiu
- School of Urban Construction, Changzhou University, Changzhou, 213164, China
| | - Xiankun Xie
- School of Urban Construction, Changzhou University, Changzhou, 213164, China
- Guangdong Wuhua Economic Development Zone Management Committee Service Center, Guangdong, 514400, China
| | - Kai Guo
- School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China
| |
Collapse
|
110
|
Palei HS, Jangid AK, Hanumant DD, Palei NC, Mishra AK. On the elephant trails: habitat suitability and connectivity for Asian elephants in eastern Indian landscape. PeerJ 2024; 12:e16746. [PMID: 38562998 PMCID: PMC10984178 DOI: 10.7717/peerj.16746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 12/11/2023] [Indexed: 04/04/2024] Open
Abstract
Identifying suitable habitats and conserving corridors are crucial to the long-term conservation of large and conflict-prone animals. Being a flagship species, survival of Asian elephants is threatened by human-induced mortality and habitat modification. We aimed to assess the habitat suitability and connectivity of the Asian elephant Elephas maximus Linnaeus, 1758 habitat in the state of Odisha in eastern India. We followed the ensemble of spatial prediction models using species presence data and five environmental variables. We used least-cost path and circuit theory approaches to identify the spatial connectivity between core habitats for Asian elephants. The results revealed that normalized difference vegetation index (NDVI; variable importance 42%) and terrain ruggedness (19%) are the most influential variables for predicting habitat suitability of species within the study area. Our habitat suitability map estimated 14.6% of Odisha's geographical area (c. 22,442 km2) as highly suitable and 13.3% (c. 20,464 km2) as moderate highly suitable. We identified 58 potential linkages to maintain the habitat connectivity across study area. Furthermore, we identified pinch points, bottlenecks, and high centrality links between core habitats. Our study offers management implications for long-term landscape conservation for Asian elephants in Odisha and highlights priority zones that can help maintain spatial links between elephant habitats.
Collapse
Affiliation(s)
| | - Ashish Kumar Jangid
- Bisalpur, Pali, Rajasthan, India
- Current affiliation: Wildlife Institute of India, Dehradun, Uttarakhand, India
| | | | | | | |
Collapse
|
111
|
Zheng Y, Zhang S, Zhao X, Miao X, Deng W. Symmetry of Pyridine Derivatives Controlled Two-Dimensional Nanostructural Diversity by Co-Assembly with Aromatic Carboxylic Acids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6424-6431. [PMID: 38470109 DOI: 10.1021/acs.langmuir.3c04009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
The self-assembly behaviors of aromatic carboxylic acids are commonly investigated at the liquid/solid interfaces because of their rigid skeletons and both hydrogen-bond donors and receptors. However, self-assemblies of aromatic carboxylic acids with low symmetry and interactions between carboxylic acid and pyridine derivatives are worth exploring. In this work, the self-assembled structural transitions of a kind of low-symmetric aromatic carboxylic acid (H4QDA) are regulated by the coadsorption of two pyridine derivatives (DPE and T4PT) with different symmetry, which are investigated by scanning tunneling microscopy under ambient conditions. For the H4QDA/DPE system, the grid structure appears. For the H4QDA/T4PT system, the coassembled morphologies display an obvious concentration dependence. With the increase of solution concentration of T4PT, three coassembled patterns (network structure, chiral linear structure, and brick-like structure) are observed. Corresponding structural models suggest that the O-H···N hydrogen bonds have great contributions to stabilizing these coassembled structures. Our studies will help to explore the complexity, diversity, and functionality of multiple component systems and are conducive to further understanding the underlying mechanisms in the assembly process.
Collapse
Affiliation(s)
- Yutuo Zheng
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Songyao Zhang
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiaoyang Zhao
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xinrui Miao
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wenli Deng
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| |
Collapse
|
112
|
Hossain S, Rafi RH, Ripa FA, Khan MRI, Hosen ME, Molla MKI, Faruqe MO, Al-Bari MAA, Das S. Modulating the antibacterial effect of the existing antibiotics along with repurposing drug metformin. Arch Microbiol 2024; 206:190. [PMID: 38519821 DOI: 10.1007/s00203-024-03917-5] [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: 12/24/2023] [Revised: 02/20/2024] [Accepted: 02/27/2024] [Indexed: 03/25/2024]
Abstract
Owing to the extensive prevalence of resistant bacteria to numerous antibiotic classes, antimicrobial resistance (AMR) poses a well-known hazard to world health. As an alternate approach in the field of antimicrobial drug discovery, repurposing the available medications which are also called antibiotic resistance breakers has been pursued for the treatment of infections with antimicrobial resistance pathogens. In this study, we used Haloperidol, Metformin and Hydroxychloroquine as repurposing drugs in in vitro (Antibacterial Antibiotic Sensitivity Test and Minimum Inhibitory Concentration-MIC) and in vivo (Shigellosis in Swiss albino mice) tests in combination with traditional antibiotics (Oxytetracycline, Erythromycin, Doxycycline, Gentamicin, Ampicillin, Chloramphenicol, and Penicillin) against a group of AMR resistance bacteria (Bacillus cereus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Shigella boydii). After observing the results of the conducted in vitro experiments we studied the effects of the above non antibiotic drugs in combination with the said antibiotics. As an repurposing adjuvant antibiotic drug, Metformin exhibited noteworthy activity in almost all in vitro, in vivo and in silico tests (Zone of inhibition for 30 to 43 mm for E.coli in combination with Doxycycline; MIC value decreased 50 µM to 0.781 µM with Doxycycline on S. boydii).In rodents Doxycycline and Metformin showed prominent against Shigellosis in White blood cell count (6.47 ± 0.152 thousand/mm3) and Erythrocyte sedimentation rate (10.5 ± 1.73 mm/hr). Our findings indicated that Metformin and Doxycycline combination has a crucial impact on Shigellosis. The molecular docking study was performed targeting the Acriflavine resistance protein B (AcrB) (PDB ID: 4CDI) and MexA protein (PDB ID: 6IOK) protein with Metformin (met8) drug which showed the highest binding energy with - 6.4 kcal/mol and - 5.5 kcal/mol respectively. Further, molecular dynamics simulation revealed that the docked complexes were relatively stable during the 100 ns simulation period. This study suggest Metformin and other experimented drugs can be used as adjuvants boost up antibiosis but further study is needed to find out the safety and efficacy of this non-antibiotic drug as potent antibiotic adjuvant.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Somlal Das
- University of Rajshahi, Rajshahi, 6205, Bangladesh
| |
Collapse
|
113
|
Li X, Tian F, Zhang B, Zhang L, Chen X, Lin X, Wang Y, Lin X, Liu Y. Quantitative proteomics analysis reveals an important role of the transcriptional regulator UidR in the bacterial biofilm formation of Aeromonas hydrophila. Front Cell Infect Microbiol 2024; 14:1380747. [PMID: 38585655 PMCID: PMC10995333 DOI: 10.3389/fcimb.2024.1380747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 03/08/2024] [Indexed: 04/09/2024] Open
Abstract
Introduction Bacterial biofilm is a well-known characteristic that plays important roles in diverse physiological functions, whereas the current intrinsic regulatory mechanism of its formation is still largely unknown. Methods In the present study, a label-free based quantitative proteomics technology was conducted to compare the differentially expressed proteins (DEPs) between ΔuidR and the wild-type strain in the biofilm state. Results The results showed that the deletion of gene uidR encoding a TetR transcriptional regulator significantly increased the biofilm formation in Aeromonas hydrophila. And there was a total of 220 DEPs, including 120 up-regulated proteins and 100 down-regulated proteins between ΔuidR and the wild-type strain based on the quantitative proteomics. Bioinformatics analysis suggested that uidR may affect bacterial biofilm formation by regulating some related proteins in glyoxylic acid and dicarboxylic acid pathway. The expressions of selected proteins involved in this pathway were further confirmed by q-PCR assay, and the results was in accordance with the quantitative proteomics data. Moreover, the deletion of four genes (AHA_3063, AHA_3062, AHA_4140 and aceB) related to the glyoxylic acid and dicarboxylic acid pathway lead to a significant decrease in the biofilm formation. Discussion Thus, the results indicated that uidR involved in the regulatory of bacterial biofilm formation, and it may provide a potential target for the drug development and a new clue for the prevention of pathogenic A. hydrophila in the future.
Collapse
Affiliation(s)
- Xiaoyan Li
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- School of Life Sciences, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Feng Tian
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- National Engineering Research Center of Juncao Technology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Binghui Zhang
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Tobacco Science, Fujian Provincial Tobacco Company, Fuzhou, China
| | - Lishan Zhang
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaomeng Chen
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaoke Lin
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuqian Wang
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiangmin Lin
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yanling Liu
- College of Life Sciences, College of Juncao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- National Engineering Research Center of Juncao Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| |
Collapse
|
114
|
Huiwen W, Shuai L, Jia X, Shihao D, Kun W, Runhuai Y, Haisheng Q, Jun L. 3D-printed nanohydroxyapatite/methylacrylylated silk fibroin scaffold for repairing rat skull defects. J Biol Eng 2024; 18:22. [PMID: 38515148 PMCID: PMC10956317 DOI: 10.1186/s13036-024-00416-5] [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: 12/20/2023] [Accepted: 02/27/2024] [Indexed: 03/23/2024] Open
Abstract
The repair of bone defects remains a major challenge in the clinic, and treatment requires bone grafts or bone replacement materials. Existing biomaterials have many limitations and cannot meet the various needs of clinical applications. To treat bone defects, we constructed a nanohydroxyapatite (nHA)/methylacrylylated silk fibroin (MASF) composite biological scaffold using photocurable 3D printing technology. In this study, scanning electron microscopy (SEM) was used to detect the changes in the morphological structure of the composite scaffold with different contents of nanohydroxyapatite, and FTIR was used to detect the functional groups and chemical bonds in the composite scaffold to determine the specific components of the scaffold. In in vitro experiments, bone marrow mesenchymal stem cells from SD rats were cocultured with scaffolds soaking solution, and the cytotoxicity, cell proliferation, Western blot analysis, Quantitative real-time PCR analysis, bone alkaline phosphatase activity and alizarin red staining of scaffolds were detected to determine the biocompatibility of scaffolds and the effect of promoting proliferation and osteogenesis of bone marrow mesenchymal stem cells in vitro. In the in vivo experiment, the skull defect was constructed by adult SD rats, and the scaffold was implanted into the skull defect site. After 4 weeks and 8 weeks of culture, the specific osteogenic effect of the scaffold in the skull defect site was detected by animal micro-CT, hematoxylin and eosin (HE) staining and Masson's staining. Through the analysis of the morphological structure of the scaffold, we found that the frame supported good retention of the lamellar structure of silk fibroin, when mixed with nHA, the surface of the stent was rougher, the cell contact area increased, and cell adhesion and lamellar microstructure for cell migration and proliferation of the microenvironment provided a better space. FTIR results showed that the scaffold completely retained the β -folded structure of silk fibroin, and the scaffold composite was present without obvious impurities. The staining results of live/dead cells showed that the constructed scaffolds had no significant cytotoxicity, and thw CCK-8 assay also showed that the constructed scaffolds had good biocompatibility. The results of osteogenic induction showed that the scaffold had good osteogenic induction ability. Moreover, the results also showed that the scaffold with a MASF: nHA ratio of 1: 0.5 (SFH) showed better osteogenic ability. The micro-CT and bone histometric results were consistent with the in vitro results after stent implantation, and there was more bone formation at the bone defect site in the SFH group.This research used photocurable 3D printing technology to successfully build an osteogenesis bracket. The results show that the constructed nHA/MASF biological composite material, has good biocompatibility and good osteogenesis function. At the same time, in the microenvironment, the material can also promote bone defect repair and can potentially be used as a bone defect filling material for bone regeneration applications.
Collapse
Affiliation(s)
- Wu Huiwen
- Department of Orthopedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
- Institute of Orthopedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
| | - Liang Shuai
- Department of Orthopedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
- Institute of Orthopedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
| | - Xie Jia
- Department of Orthopedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
- Institute of Orthopedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
| | - Deng Shihao
- Department of Orthopedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
- Institute of Orthopedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China
| | - Wei Kun
- School of Biomedical Engineering, Anhui Provincial Institute of Translational Medicine, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Yang Runhuai
- School of Biomedical Engineering, Anhui Provincial Institute of Translational Medicine, Anhui Medical University, Hefei, 230032, People's Republic of China.
| | - Qian Haisheng
- School of Biomedical Engineering, Anhui Provincial Institute of Translational Medicine, Anhui Medical University, Hefei, 230032, People's Republic of China.
| | - Li Jun
- Department of Orthopedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China.
- Institute of Orthopedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, China.
| |
Collapse
|
115
|
Qu J, Wu L, Zhang M, Kan M, Chen H, Shi Y, Wang S, Wang X, Chen F. Serum autophagy-related gene 5 level in stroke patients: correlation with CD4+ T cells and cognition impairment during a 3-year follow-up. Braz J Med Biol Res 2024; 57:e13019. [PMID: 38511768 PMCID: PMC10946239 DOI: 10.1590/1414-431x2024e13019] [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: 05/19/2023] [Accepted: 02/04/2024] [Indexed: 03/22/2024] Open
Abstract
Autophagy-related gene (ATG) 5 regulates blood lipids, chronic inflammation, CD4+ T-cell differentiation, and neuronal death and is involved in post-stroke cognitive impairment. This study aimed to explore the correlation of serum ATG5 with CD4+ T cells and cognition impairment in stroke patients. Peripheral blood was collected from 180 stroke patients for serum ATG5 and T helper (Th) 1, Th2, Th17, and regulatory T (Treg) cell detection via enzyme-linked immunosorbent assays and flow cytometry. The Mini-Mental State Examination (MMSE) scale was completed at enrollment, year (Y)1, Y2, and Y3 in stroke patients. Serum ATG5 was also measured in 50 healthy controls (HCs). Serum ATG5 was elevated in stroke patients compared to HCs (P<0.001) and was positively correlated to Th2 cells (P=0.022), Th17 cells (P<0.001), and Th17/Treg ratio (P<0.001) in stroke patients but not correlated with Th1 cells, Th1/Th2 ratio, or Treg cells (all P>0.050). Serum ATG5 (P=0.037), Th1 cells (P=0.022), Th17 cells (P=0.002), and Th17/Treg ratio (P=0.018) were elevated in stroke patients with MMSE score-identified cognition impairment vs those without cognition impairment, whereas Th2 cells, Th1/Th2 ratio, and Treg cells were not different between them (all P>0.050). Importantly, serum ATG5 was negatively linked with MMSE score at enrollment (P=0.004), Y1 (P=0.002), Y2 (P=0.014), and Y3 (P=0.001); moreover, it was positively related to 2-year (P=0.024) and 3-year (P=0.012) MMSE score decline in stroke patients. Serum ATG5 was positively correlated with Th2 and Th17 cells and estimated cognitive function decline in stroke patients.
Collapse
Affiliation(s)
- Juanjuan Qu
- Department of Emergency, Handan Central Hospital, Handan, China
| | - Linxia Wu
- Department of Emergency, Handan Central Hospital, Handan, China
| | - Meng Zhang
- Department of Emergency, Handan Central Hospital, Handan, China
| | - Minchen Kan
- Department of Emergency, Handan Central Hospital, Handan, China
| | - Huimin Chen
- Department of Emergency, Handan Central Hospital, Handan, China
| | - Yanqing Shi
- Department of Emergency, Handan Central Hospital, Handan, China
| | - Shuangyu Wang
- Department of Nephrology, Handan Central Hospital, Handan, China
| | - Xiaohua Wang
- Department of Neonatal Ward, Handan Central Hospital, Handan, China
| | - Fan Chen
- Department of Emergency, Handan Central Hospital, Handan, China
| |
Collapse
|
116
|
Mittal R, Koutras N, Maya J, Lemos JRN, Hirani K. Blood glucose monitoring devices for type 1 diabetes: a journey from the food and drug administration approval to market availability. Front Endocrinol (Lausanne) 2024; 15:1352302. [PMID: 38559693 PMCID: PMC10978642 DOI: 10.3389/fendo.2024.1352302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 02/22/2024] [Indexed: 04/04/2024] Open
Abstract
Blood glucose monitoring constitutes a pivotal element in the clinical management of Type 1 diabetes (T1D), a globally escalating metabolic disorder. Continuous glucose monitoring (CGM) devices have demonstrated efficacy in optimizing glycemic control, mitigating adverse health outcomes, and augmenting the overall quality of life for individuals afflicted with T1D. Recent progress in the field encompasses the refinement of electrochemical sensors, which enhances the effectiveness of blood glucose monitoring. This progress empowers patients to assume greater control over their health, alleviating the burdens associated with their condition, and contributing to the overall alleviation of the healthcare system. The introduction of novel medical devices, whether derived from existing prototypes or originating as innovative creations, necessitates adherence to a rigorous approval process regulated by the Food and Drug Administration (FDA). Diverse device classifications, stratified by their associated risks, dictate distinct approval pathways, each characterized by varying timelines. This review underscores recent advancements in blood glucose monitoring devices primarily based on electrochemical sensors and elucidates their regulatory journey towards FDA approval. The advent of innovative, non-invasive blood glucose monitoring devices holds promise for maintaining stringent glycemic control, thereby preventing T1D-associated comorbidities, and extending the life expectancy of affected individuals.
Collapse
Affiliation(s)
- Rahul Mittal
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Nicole Koutras
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL, United States
| | - Jonathan Maya
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL, United States
| | - Joana R. N. Lemos
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Khemraj Hirani
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL, United States
| |
Collapse
|
117
|
Kwon JA, Bretaña NA, Kronfli N, Dussault C, Grant L, Galouzis J, Hoey W, Blogg J, Lloyd AR, Gray RT. Preparing correctional settings for the next pandemic: a modeling study of COVID-19 outbreaks in two high-income countries. Front Public Health 2024; 12:1279572. [PMID: 38560445 PMCID: PMC10978752 DOI: 10.3389/fpubh.2024.1279572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 02/20/2024] [Indexed: 04/04/2024] Open
Abstract
Introduction Correctional facilities are high-priority settings for coordinated public health responses to the COVID-19 pandemic. These facilities are at high risk of disease transmission due to close contacts between people in prison and with the wider community. People in prison are also vulnerable to severe disease given their high burden of co-morbidities. Methods We developed a mathematical model to evaluate the effect of various public health interventions, including vaccination, on the mitigation of COVID-19 outbreaks, applying it to prisons in Australia and Canada. Results We found that, in the absence of any intervention, an outbreak would occur and infect almost 100% of people in prison within 20 days of the index case. However, the rapid rollout of vaccines with other non-pharmaceutical interventions would almost eliminate the risk of an outbreak. Discussion Our study highlights that high vaccination coverage is required for variants with high transmission probability to completely mitigate the outbreak risk in prisons.
Collapse
Affiliation(s)
- Jisoo A. Kwon
- Kirby Institute, UNSW Sydney, Sydney, NSW, Australia
| | | | - Nadine Kronfli
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
- McGill University Health Centre, Montreal, QC, Canada
| | - Camille Dussault
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Luke Grant
- Corrective Services NSW, Sydney, NSW, Australia
| | | | - Wendy Hoey
- Justice Health Forensic Mental Health Network NSW, Sydney, NSW, Australia
| | - James Blogg
- Justice Health Forensic Mental Health Network NSW, Sydney, NSW, Australia
| | | | | |
Collapse
|
118
|
Zhang YX, Cai X, Zhang XG, Ke H, Lan JW, Xu WJ, Chen YM. Periodic injection of liquefied kitchen and food waste in municipal solid waste: Effects on leachate and gas generation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 176:1-10. [PMID: 38246072 DOI: 10.1016/j.wasman.2024.01.020] [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: 09/22/2023] [Revised: 12/18/2023] [Accepted: 01/12/2024] [Indexed: 01/23/2024]
Abstract
With continuous advancements in the zero-waste strategy in China, transportation of fresh municipal solid waste to landfills has ceased in most first-tier cities. Consequently, the production of landfill gas has sharply declined because the supply of organic matter has decreased, rendering power generation facilities idle. However, by incorporating liquefied kitchen and food waste (LKFW), sustainable methane production can be achieved while consuming organic wastewater. In this study, LKFW and water (as a control group) were periodically injected into high and low organic wastes, respectively. The biochemical characteristics of the resulting gas and leachate were analyzed. LKFW used in this research generated 19.5-37.6 L of methane per liter in the post-methane production phase, highlighting the effectiveness of LKFW injection in enhancing the methane-producing capacity of the system. The release of H2S was prominent during both the rapid and post-methane production phases, whereas that of NH3 was prominent in the post-methane production phase. As injection continued, the concentrations of chemical oxygen demand, 5-d biological oxygen demand, total organic carbon, ammonia nitrogen, total nitrogen, and oil in the output leachate decreased and eventually reached levels comparable to those in the water injection cases. After nine rounds of injections, the biologically degradable matter of the two LKFW-injected wastes decreased by 8.2 % and 15.1 %, respectively. This study sheds light on determining the organic load, controlling odor, and assessing the biochemical characteristics of leachate during LKFW injection.
Collapse
Affiliation(s)
- Yu-Xiang Zhang
- MOE Key Laboratory of Soft Soils and Geo-environmental Engineering, Zhejiang University, China
| | - Xue Cai
- GZEPI Environmental Service Co., Ltd., China
| | | | - Han Ke
- MOE Key Laboratory of Soft Soils and Geo-environmental Engineering, Zhejiang University, China.
| | - Ji-Wu Lan
- MOE Key Laboratory of Soft Soils and Geo-environmental Engineering, Zhejiang University, China
| | - Wen-Jie Xu
- MOE Key Laboratory of Soft Soils and Geo-environmental Engineering, Zhejiang University, China; Center for Hypergravity Experimental and Interdisciplinary Research, Zhejiang University, China
| | - Yun-Min Chen
- MOE Key Laboratory of Soft Soils and Geo-environmental Engineering, Zhejiang University, China; Center for Hypergravity Experimental and Interdisciplinary Research, Zhejiang University, China
| |
Collapse
|
119
|
Kannankai MP, Devipriya SP. Air quality impacts of landfill fires: A case study from the Brahmapuram Municipal Solid Waste Treatment Plant in Kochi, India. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170289. [PMID: 38253103 DOI: 10.1016/j.scitotenv.2024.170289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/26/2023] [Accepted: 01/17/2024] [Indexed: 01/24/2024]
Abstract
The occurrence of waste fires in unscientifically managed landfill sites has become a pressing environmental issue in the urban centers of developing economies. In the present work, an investigation was carried out to evaluate the air quality implications of three major fire events that occurred at the Brahmapuram Municipal Solid Waste Treatment Plant (BMSWTP) in Kochi, India. Initially, Landsat-based surface temperature monitoring was conducted to identify the thermal hotspots within the landfill. The emissions of different pollutants during waste fires were quantified and compared between satellite-based ex-situ and field-based in-situ methods. The dispersion patterns of PM2.5 particles released during the fires were visualised using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) particle dispersion model. The Landfill Gas Emissions Model (LandGEM) was employed to quantify the greenhouse gases (GHGs) released during waste storage, which was then compared with the GHGs emissions during waste fires. In-situ emission estimates showed that the combustion of waste at BMSWTP led to the release of 909.3 MT of PM10, 938.8 MT of PM2.5, 5832.9 MT of CO, 43.6 MT of SOx, 284.2 MT of NOx, 138,941.9 MT of CO2, 426.8 MT of CH4, and 2665.1 MT of VOC. However, a noticeable disparity was observed between the in-situ and ex-situ emission estimates, wherein the latter underestimated the actual emissions. Most of the emitted PM2.5 particles propagated oceanward under the influence of prevailing winds, covering the densely populated areas of Kochi municipal corporation. The amount of CH4 and CO2 emitted during the waste fires was on par with the emissions from 159 days of waste storage for CH4 and 51.8 years of waste storage for CO2, with a cumulative global warming potential of 147.9 Gg CO2-e.
Collapse
|
120
|
Wang ST, Fang WH, Zhang J. Meltable Aluminum Molecular Rings with Fluorescence and Nonlinear Optical Properties. Angew Chem Int Ed Engl 2024; 63:e202400161. [PMID: 38247355 DOI: 10.1002/anie.202400161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 01/19/2024] [Accepted: 01/19/2024] [Indexed: 01/23/2024]
Abstract
Crystal-liquid-glass, which combines the tunable properties of crystalline compounds with the processability of glasses, has emerged as a new class of materials for fabricating bulk-shapable devices in real applications. Inspired by the characteristics of deep eutectic solvent (DES) mixtures involving significant depressions in melting points compared to their neat constituent components, in this study, we designed and synthesized the first examples of meltable aluminum oxo clusters (AlOCs) via lattice doping with DESs at the molecular level. The abundant and strong hydrogen bonding between the aluminum molecular ring, DES components, and lattice solvents is postulated to be the root that affords melting point depressions and, thus, "melting" clusters. We prepared a transparent bubble-free glass film under autogenous pressure using a hot-press method. These cluster-based films exhibited luminescent and nonlinear optical properties similar to those of pristine crystalline compounds. Our study belongs to the interdisciplinary disciplines of chemistry and physics. It not only breaks the limitations of crystalline glass on metal and ligand types but also acts as a general guide for extending the range of meltable crystalline materials.
Collapse
Affiliation(s)
- San-Tai Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Wei-Hui Fang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jian Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| |
Collapse
|
121
|
Das S, Thimukonda Jegadeesan J, Basu B. Advancing Peripheral Nerve Regeneration: 3D Bioprinting of GelMA-Based Cell-Laden Electroactive Bioinks for Nerve Conduits. ACS Biomater Sci Eng 2024; 10:1620-1645. [PMID: 38345020 DOI: 10.1021/acsbiomaterials.3c01226] [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] [Indexed: 03/12/2024]
Abstract
Peripheral nerve injuries often result in substantial impairment of the neurostimulatory organs. While the autograft is still largely used as the "gold standard" clinical treatment option, nerve guidance conduits (NGCs) are currently considered a promising approach for promoting peripheral nerve regeneration. While several attempts have been made to construct NGCs using various biomaterial combinations, a comprehensive exploration of the process science associated with three-dimensional (3D) extrusion printing of NGCs with clinically relevant sizes (length: 20 mm; diameter: 2-8 mm), while focusing on tunable buildability using electroactive biomaterial inks, remains unexplored. In addressing this gap, we present here the results of the viscoelastic properties of a range of a multifunctional gelatin methacrylate (GelMA)/poly(ethylene glycol) diacrylate (PEGDA)/carbon nanofiber (CNF)/gellan gum (GG) hydrogel bioink formulations and printability assessment using experiments and quantitative models. Our results clearly established the positive impact of the gellan gum on the enhancement of the rheological properties. Interestingly, the strategic incorporation of PEGDA as a secondary cross-linker led to a remarkable enhancement in the strength and modulus by 3 and 8-fold, respectively. Moreover, conductive CNF addition resulted in a 4-fold improvement in measured electrical conductivity. The use of four-component electroactive biomaterial ink allowed us to obtain high neural cell viability in 3D bioprinted constructs. While the conventionally cast scaffolds can support the differentiation of neuro-2a cells, the most important result has been the excellent cell viability of neural cells in 3D encapsulated structures. Taken together, our findings demonstrate the potential of 3D bioprinting and multimodal biophysical cues in developing functional yet critical-sized nerve conduits for peripheral nerve tissue regeneration.
Collapse
Affiliation(s)
- Soumitra Das
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | | | - Bikramjit Basu
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| |
Collapse
|
122
|
Branković M, Zivic F, Grujovic N, Stojadinovic I, Milenkovic S, Kotorcevic N. Review of Spider Silk Applications in Biomedical and Tissue Engineering. Biomimetics (Basel) 2024; 9:169. [PMID: 38534854 DOI: 10.3390/biomimetics9030169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/28/2024] Open
Abstract
This review will present the latest research related to the production and application of spider silk and silk-based materials in reconstructive and regenerative medicine and tissue engineering, with a focus on musculoskeletal tissues, and including skin regeneration and tissue repair of bone and cartilage, ligaments, muscle tissue, peripheral nerves, and artificial blood vessels. Natural spider silk synthesis is reviewed, and the further recombinant production of spider silk proteins. Research insights into possible spider silk structures, like fibers (1D), coatings (2D), and 3D constructs, including porous structures, hydrogels, and organ-on-chip designs, have been reviewed considering a design of bioactive materials for smart medical implants and drug delivery systems. Silk is one of the toughest natural materials, with high strain at failure and mechanical strength. Novel biomaterials with silk fibroin can mimic the tissue structure and promote regeneration and new tissue growth. Silk proteins are important in designing tissue-on-chip or organ-on-chip technologies and micro devices for the precise engineering of artificial tissues and organs, disease modeling, and the further selection of adequate medical treatments. Recent research indicates that silk (films, hydrogels, capsules, or liposomes coated with silk proteins) has the potential to provide controlled drug release at the target destination. However, even with clear advantages, there are still challenges that need further research, including clinical trials.
Collapse
Affiliation(s)
- Marija Branković
- Institute for Information Technologies, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia
- Faculty of Engineering, University of Kragujevac, Liceja Knezevine Srbije 1A, 34000 Kragujevac, Serbia
| | - Fatima Zivic
- Faculty of Engineering, University of Kragujevac, Liceja Knezevine Srbije 1A, 34000 Kragujevac, Serbia
| | - Nenad Grujovic
- Faculty of Engineering, University of Kragujevac, Liceja Knezevine Srbije 1A, 34000 Kragujevac, Serbia
| | - Ivan Stojadinovic
- Clinic for Orthopaedics and Traumatology, University Clinical Center, Zmaj Jovina 30, 34000 Kragujevac, Serbia
- Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia
| | - Strahinja Milenkovic
- Faculty of Engineering, University of Kragujevac, Liceja Knezevine Srbije 1A, 34000 Kragujevac, Serbia
| | - Nikola Kotorcevic
- Faculty of Engineering, University of Kragujevac, Liceja Knezevine Srbije 1A, 34000 Kragujevac, Serbia
| |
Collapse
|
123
|
Bandyopadhyay A, Ghibhela B, Mandal BB. Current advances in engineering meniscal tissues: insights into 3D printing, injectable hydrogels and physical stimulation based strategies. Biofabrication 2024; 16:022006. [PMID: 38277686 DOI: 10.1088/1758-5090/ad22f0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 01/26/2024] [Indexed: 01/28/2024]
Abstract
The knee meniscus is the cushioning fibro-cartilage tissue present in between the femoral condyles and tibial plateau of the knee joint. It is largely avascular in nature and suffers from a wide range of tears and injuries caused by accidents, trauma, active lifestyle of the populace and old age of individuals. Healing of the meniscus is especially difficult due to its avascularity and hence requires invasive arthroscopic approaches such as surgical resection, suturing or implantation. Though various tissue engineering approaches are proposed for the treatment of meniscus tears, three-dimensional (3D) printing/bioprinting, injectable hydrogels and physical stimulation involving modalities are gaining forefront in the past decade. A plethora of new printing approaches such as direct light photopolymerization and volumetric printing, injectable biomaterials loaded with growth factors and physical stimulation such as low-intensity ultrasound approaches are being added to the treatment portfolio along with the contemporary tear mitigation measures. This review discusses on the necessary design considerations, approaches for 3D modeling and design practices for meniscal tear treatments within the scope of tissue engineering and regeneration. Also, the suitable materials, cell sources, growth factors, fixation and lubrication strategies, mechanical stimulation approaches, 3D printing strategies and injectable hydrogels for meniscal tear management have been elaborated. We have also summarized potential technologies and the potential framework that could be the herald of the future of meniscus tissue engineering and repair approaches.
Collapse
Affiliation(s)
- Ashutosh Bandyopadhyay
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Baishali Ghibhela
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Biman B Mandal
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Jyoti and Bhupat Mehta School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| |
Collapse
|
124
|
Jain V, Kerr G, Beaney T. The impact of the 2022 spring COVID-19 booster vaccination programme on hospital occupancy in England: An interrupted time series analysis. PLOS GLOBAL PUBLIC HEALTH 2024; 4:e0002046. [PMID: 38446763 PMCID: PMC10917281 DOI: 10.1371/journal.pgph.0002046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 01/29/2024] [Indexed: 03/08/2024]
Abstract
Regular booster vaccination programmes help protect the most vulnerable from COVID-19 and limit pressure on health systems. Existing studies find booster doses to be effective in preventing hospital admissions and deaths but focus on individual effects, failing to consider the population impact of incomplete vaccination coverage and seasonal patterns in disease transmission. We estimated the effectiveness of the 2022 spring booster vaccination programme, available for those aged 75 years and older, residents in care homes, and adults with weakened immune systems, on COVID-19 hospital bed occupancy in England. Booster vaccine coverage in the eligible population increased rapidly in the months after rollout (from 21st March 2022), flattening out just below 80% by July 2022. We used interrupted time series analysis to estimate a 23.7% overall reduction in the rate of hospital occupancy for COVID-19 following the programme, with a statistically significant benefit in the 6-12 weeks following rollout. In the absence of the programme, we calculate that a total of 380,104 additional hospital bed-days would have been occupied by patients with COVID-19 from 4th April to 31st August 2022 (95% CI: -122,842 to 1,034,590). The programme delayed and shortened the duration of the peak while not reducing its magnitude. In sensitivity analyses adjusting the start of the post-intervention period or removing the rate of COVID-19 infection in the over 60s from the model, the effect of the spring booster programme on hospital bed occupancy remained similar. Our findings suggest that timing is a critical consideration in the implementation of COVID-19 booster programmes and that policymakers cannot rely on intermittent booster vaccination of high-risk groups alone to mitigate anticipated peaks in hospital pressure due to COVID-19 epidemics.
Collapse
Affiliation(s)
- Vageesh Jain
- Royal Free London NHS Foundation Trust, London, United Kingdom
| | - Gabriele Kerr
- Department of Primary Care and Public Health, Imperial College London, London, United Kingdom
| | - Thomas Beaney
- Department of Primary Care and Public Health, Imperial College London, London, United Kingdom
| |
Collapse
|
125
|
Raza MA, Aman MM, Abbas G, Soomro SA, Yousef A, Touti E, Mirjat NH, Khan MHA. Managing the low carbon transition pathways through solid waste electricity. Sci Rep 2024; 14:5490. [PMID: 38448493 PMCID: PMC10917795 DOI: 10.1038/s41598-024-56167-2] [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: 12/06/2023] [Accepted: 03/02/2024] [Indexed: 03/08/2024] Open
Abstract
The potential of solid waste as an energy source is clear, owing to its wide availability and renewable properties, which provide a critical answer for energy security. This can be especially effective in reducing the environmental impact of fossil fuels. Countries that rely heavily on coal should examine alternatives such as electricity from solid waste to provide a constant energy supply while also contributing to atmospheric restoration. In this regards, Low Emissions Analysis Platform (LEAP) is used for simulation the entire energy system in Pakistan and forecasted its capital cost and future CO2 emissions in relation to the use of renewable and fossil fuel resources under the different growth rates of solid waste projects like 20%, 30% and 40% for the study period 2023-2053. The results revealed that, 1402.97 TWh units of energy are generated to meet the total energy demand of 1193.93 TWh until 2053. The share of solid waste based electricity in total energy mix is increasing from a mere 0.81% in 2023 to around 9.44% by 2053 under the 20% growth rate, which then increase to 39.67% by 2053 under the 30% growth rate and further increases to 78.33% by 2053 under the 40% growth rate. It is suggested that 40% growth rate for solid waste based electricity projects is suitable for Pakistan until 2053 because under this condition, renewable sources contributes 95.2% and fossil fuels contributed 4.47% in the total energy mix of Pakistan. Hence, CO2 emissions are reduced from 148.26 million metric tons to 35.46 million metric tons until 2053 but capital cost is increased from 13.23 b$ in 2023 to 363.11 b$ by 2053.
Collapse
Affiliation(s)
- Muhammad Amir Raza
- Department of Electrical Engineering, Mehran University of Engineering and Technology, SZAB Campus, Khairpur Mir's, 66020, Sindh, Pakistan
- Centre for Advanced Studies in Renewable Energy (ASURE), NED University of Engineering and Technology, Karachi, 75270, Sindh, Pakistan
| | - M M Aman
- Centre for Advanced Studies in Renewable Energy (ASURE), NED University of Engineering and Technology, Karachi, 75270, Sindh, Pakistan
| | - Ghulam Abbas
- School of Electrical Engineering, Southeast University, Nanjing, 210096, China
| | - Shakir Ali Soomro
- Department of Electrical Engineering, Mehran University of Engineering and Technology, SZAB Campus, Khairpur Mir's, 66020, Sindh, Pakistan
| | - Amr Yousef
- Electrical Engineering Department, University of Business and Technology, Ar Rawdah, 23435, Jeddah, Saudi Arabia
- Engineering Mathematics Department, Alexandria University, Lotfy El-Sied St. Off Gamal Abd El-Naser, Alexandria, 11432, Egypt
| | - Ezzeddine Touti
- Department of Electrical Engineering, College of Engineering, Northern Border University, Arar, 91431, Saudi Arabia.
- Department of Electrical Engineering, Higher Institute of Applied Sciences and Technology of Kasserine, University of Kairouan, 3100, Kairouan, Tunisia.
| | - Nayyar Hussain Mirjat
- Department of Electrical Engineering, Mehran University of Engineering and Technology, Jamshoro, 76060, Sindh, Pakistan
| | - Mohammad Huzaifa Ahmed Khan
- Department of Electronics Engineering, NED University of Engineering and Technology, Karachi, 75270, Sindh, Pakistan
| |
Collapse
|
126
|
Kumari N, Roy P, Roy S, Wang C, Das S, Pandey N, Mondal SK, Bose A, Sun CC, Ghosh A. Development of direct compression Acetazolamide tablet with improved bioavailability in healthy human volunteers enabled by cocrystallization with p-Aminobenzoic acid. Int J Pharm 2024; 652:123793. [PMID: 38195033 DOI: 10.1016/j.ijpharm.2024.123793] [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: 11/21/2023] [Revised: 12/14/2023] [Accepted: 01/04/2024] [Indexed: 01/11/2024]
Abstract
Pharmaceutical cocrystallization has been widely used to improve physicochemical properties of APIs. However, developing cocrystal formulation with proven clinical success remains scarce. Successful translation of a cocrystal to suitable dosage forms requires simultaneously improvement of several deficient physicochemical properties over the parent API, without deteriorating other properties critical for successful product development. In the present work, we report the successful development of a direct compression tablet product of acetazolamide (ACZ), using a 1:1 cocrystal of acetazolamide with p-aminobenzoic acid (ACZ-PABA). The ACZ-PABA tablet exhibits superior biopharmaceutical performance against the commercial tablet, DIAMOX® (250 mg), in healthy human volunteers, leading to more than 50 % reduction in the required dose.
Collapse
Affiliation(s)
- Nimmy Kumari
- Solid State Pharmaceutics Research Lab, Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India
| | - Parag Roy
- Solid State Pharmaceutics Research Lab, Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India
| | - Sukanta Roy
- Bioequivalence Study Center, TAAB Biostudy Services, Ibrahimpore Road, Kolkata 700032, India; School of Pharmacy, The Neotia University, Sarisha, West Bengal 743368, India
| | - Chenguang Wang
- Pharmaceutical Materials Science and Engineering Laboratory, Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 9-127B Weaver-Densford Hall, 308 Harvard Street S.E, Minneapolis, MN 55455, United States
| | - Sourav Das
- Bioequivalence Study Center, TAAB Biostudy Services, Ibrahimpore Road, Kolkata 700032, India; School of Pharmacy, The Neotia University, Sarisha, West Bengal 743368, India
| | - Noopur Pandey
- Solid State Pharmaceutics Research Lab, Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India
| | - Susanta Kumar Mondal
- TCG Life Sciences Pvt. Ltd, Block-EP & GP, BIPL, Tower-B, Salt Lake, Sector-V, Kolkata 700091, India
| | - Anirbandeep Bose
- Bioequivalence Study Center, TAAB Biostudy Services, Ibrahimpore Road, Kolkata 700032, India
| | - Changquan Calvin Sun
- Pharmaceutical Materials Science and Engineering Laboratory, Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 9-127B Weaver-Densford Hall, 308 Harvard Street S.E, Minneapolis, MN 55455, United States.
| | - Animesh Ghosh
- Solid State Pharmaceutics Research Lab, Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India.
| |
Collapse
|
127
|
Al-Hazmi HE, Hassan GK, Kurniawan TA, Śniatała B, Joseph TM, Majtacz J, Piechota G, Li X, El-Gohary FA, Saeb MR, Mąkinia J. Technological solutions to landfill management: Towards recovery of biomethane and carbon neutrality. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120414. [PMID: 38412730 DOI: 10.1016/j.jenvman.2024.120414] [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: 10/18/2023] [Revised: 12/23/2023] [Accepted: 02/15/2024] [Indexed: 02/29/2024]
Abstract
Inadequate landfill management poses risks to the environment and human health, necessitating action. Poorly designed and operated landfills release harmful gases, contaminate water, and deplete resources. Aligning landfill management with the Sustainable Development Goals (SDGs) reveals its crucial role in achieving various targets. Urgent transformation of landfill practices is necessary to address challenges like climate change, carbon neutrality, food security, and resource recovery. The scientific community recognizes landfill management's impact on climate change, evidenced by in over 191 published articles (1998-2023). This article presents emerging solutions for sustainable landfill management, including physico-chemical, oxidation, and biological treatments. Each technology is evaluated for practical applications. The article emphasizes landfill management's global significance in pursuing carbon neutrality, prioritizing resource recovery over end-of-pipe treatments. It is important to note that minimizing water, chemical, and energy inputs in nutrient recovery is crucial for achieving carbon neutrality by 2050. Water reuse, energy recovery, and material selection during manufacturing are vital. The potential of water technologies for recovering macro-nutrients from landfill leachate is explored, considering feasibility factors. Integrated waste management approaches, such as recycling and composting, reduce waste and minimize environmental impact. It is conclusively evident that the water technologies not only facilitate the purification of leachate but also enable the recovery of valuable substances such as ammonium, heavy metals, nutrients, and salts. This recovery process holds economic benefits, while the conversion of CH4 and hydrogen into bioenergy and power generation through microbial fuel cells further enhances its potential. Future research should focus on sustainable and cost-effective treatment technologies for landfill leachate. Improving landfill management can mitigate the adverse environmental and health effects of inadequate waste disposal.
Collapse
Affiliation(s)
- Hussein E Al-Hazmi
- Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk, 80-233, Poland.
| | - Gamal K Hassan
- Water Pollution Research Department, National Research Centre, 33 Bohouth St, Giza, Dokki, P.O. Box 12622, Egypt.
| | | | - Bogna Śniatała
- Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk, 80-233, Poland
| | - Tomy Muringayil Joseph
- Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12 80-233, Gdańsk, Poland
| | - Joanna Majtacz
- Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk, 80-233, Poland
| | - Grzegorz Piechota
- GPCHEM. Laboratory of Biogas Research and Analysis, ul. Legionów 40a/3, Toruń, 87-100, Poland
| | - Xiang Li
- School of Environmental Science & Engineering, Donghua Univerisity, Dept Env. Room 4155, 2999 North Renmin Rd, Songjiang District, Shanghai, China
| | - Fatma A El-Gohary
- Water Pollution Research Department, National Research Centre, 33 Bohouth St, Giza, Dokki, P.O. Box 12622, Egypt
| | - Mohammad Reza Saeb
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, J. Hallera 107, 80-416, Gdańsk, Poland
| | - Jacek Mąkinia
- Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk, 80-233, Poland
| |
Collapse
|
128
|
Robin VV. Population genetics of animals in the wild to aid conservation: Uma Ramakrishnan-Recipient of the 2023 Molecular Ecology Prize. Mol Ecol 2024; 33:e17290. [PMID: 38339857 DOI: 10.1111/mec.17290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/13/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024]
Affiliation(s)
- V V Robin
- IISER Tirupati, Tirupati, Andhra Pradesh, India
| |
Collapse
|
129
|
Hernández CM, Ellner SP, Snyder RE, Hooker G. The natural history of luck: A synthesis study of structured population models. Ecol Lett 2024; 27:e14390. [PMID: 38549267 DOI: 10.1111/ele.14390] [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: 07/31/2023] [Revised: 01/18/2024] [Accepted: 02/08/2024] [Indexed: 04/02/2024]
Abstract
Chance pervades life. In turn, life histories are described by probabilities (e.g. survival and breeding) and averages across individuals (e.g. mean growth rate and age at maturity). In this study, we explored patterns of luck in lifetime outcomes by analysing structured population models for a wide array of plant and animal species. We calculated four response variables: variance and skewness in both lifespan and lifetime reproductive output (LRO), and partitioned them into contributions from different forms of luck. We examined relationships among response variables and a variety of life history traits. We found that variance in lifespan and variance in LRO were positively correlated across taxa, but that variance and skewness were negatively correlated for both lifespan and LRO. The most important life history trait was longevity, which shaped variance and skew in LRO through its effects on variance in lifespan. We found that luck in survival, growth, and fecundity all contributed to variance in LRO, but skew in LRO was overwhelmingly due to survival luck. Rapidly growing populations have larger variances in LRO and lifespan than shrinking populations. Our results indicate that luck-induced genetic drift may be most severe in recovering populations of species with long mature lifespan and high iteroparity.
Collapse
Affiliation(s)
- Christina M Hernández
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Stephen P Ellner
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Robin E Snyder
- Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Giles Hooker
- Department of Statistics and Data Science, Cornell University, Ithaca, New York, USA
| |
Collapse
|
130
|
Kanniappan V, Rajeswari AJ, Padma Lawrence PE, Sundar S. Understanding the Perspectives of Paediatric Physicians on Physiotherapy in Paediatric Rehabilitation in Chennai, India: A Qualitative Approach. J Prev Med Public Health 2024; 57:157-166. [PMID: 38374710 PMCID: PMC10999305 DOI: 10.3961/jpmph.23.426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/26/2023] [Accepted: 12/29/2023] [Indexed: 02/21/2024] Open
Abstract
OBJECTIVES Children with disabilities may exhibit a multitude of symptoms, and treatment requires a multidisciplinary approach for a satisfactory outcome. Lack of awareness among physicians, lack of referral, and lack of inter-sectoral coordination have hindered paediatric practice in Tamil Nadu, a state in India with a striking childhood disability rate that warrants a timely interdisciplinary approach. However, the perspectives of paediatricians on paediatric physiotherapy are unknown. The aim of the study was to investigate the perspectives of practicing paediatric physicians in Chennai on the role of physiotherapy in paediatrics. METHODS For an in-depth exploration, qualitative semi-structured interviews were conducted in person with 10 paediatricians. Audio from the sessions was recorded and transcribed, and data saturation was achieved through iterative analysis. RESULTS A grounded theory analysis of the results yielded 5 domains under which the perspectives and expectations of the physicians were described, along with the barriers experienced by patients' parents as explained by their paediatrician. The responses highlighted deficits in awareness, structural support, accessibility and direct communication between physicians and physiotherapists. CONCLUSIONS Paediatric physicians have different opinions, and some ignorance persists concerning paediatric physiotherapy. This study warrants a proper structure of the paediatric rehabilitation unit and regular interdisciplinary meetings and focus group discussions to increase access for parents and improve patient outcomes.
Collapse
Affiliation(s)
- Vadivelan Kanniappan
- SRM College of Physiotherapy, SRM Institute of Science and Technology, Kattankulathur, India
| | | | | | - Subash Sundar
- Department of Paediatrics, SRM Medical College Hospital and Research Centre, Kattankulathur, India
| |
Collapse
|
131
|
Dhiman S, Khanna K, Kour J, Singh AD, Bhardwaj T, Devi K, Sharma N, Kumar V, Bhardwaj R. Landfill bacteriology: Role in waste bioprocessing elevated landfill gaseselimination and heat management. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120364. [PMID: 38387351 DOI: 10.1016/j.jenvman.2024.120364] [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: 09/01/2023] [Revised: 01/10/2024] [Accepted: 02/08/2024] [Indexed: 02/24/2024]
Abstract
This study delves into the critical role of microbial ecosystems in landfills, which are pivotal for handling municipal solid waste (MSW). Within these landfills, a complex interplay of several microorganisms (aerobic/anaerobic bacteria, archaea or methanotrophs), drives the conversion of complex substrates into simplified compounds and complete mineralization into the water, inorganic salts, and gases, including biofuel methane gas. These landfills have dominant biotic and abiotic environments where various bacterial, archaeal, and fungal groups evolve and interact to decompose substrate by enabling hydrolytic, fermentative, and methanogenic processes. Each landfill consists of diverse bio-geochemical environments with complex microbial populations, ranging from deeply underground anaerobic methanogenic systems to near-surface aerobic systems. These kinds of landfill generate leachates which in turn emerged as a significant risk to the surrounding because generated leachates are rich in toxic organic/inorganic components, heavy metals, minerals, ammonia and xenobiotics. In addition to this, microbial communities in a landfill ecosystem could not be accurately identified using lab microbial-culturing methods alone because most of the landfill's microorganisms cannot grow on a culture medium. Due to these reasons, research on landfills microbiome has flourished which has been characterized by a change from a culture-dependent approach to a more sophisticated use of molecular techniques like Sanger Sequencing and Next-Generation Sequencing (NGS). These sequencing techniques have completely revolutionized the identification and analysis of these diverse microbial communities. This review underscores the significance of microbial functions in waste decomposition, gas management, and heat control in landfills. It further explores how modern sequencing technologies have transformed our approach to studying these complex ecosystems, offering deeper insights into their taxonomic composition and functionality.
Collapse
Affiliation(s)
- Shalini Dhiman
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India
| | - Kanika Khanna
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India; Department of Microbiology, DAV University, Sarmastpur, Jalandhar, 144001, Punjab, India
| | - Jaspreet Kour
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India
| | - Arun Dev Singh
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India
| | - Tamanna Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India
| | - Kamini Devi
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India
| | - Neerja Sharma
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India
| | - Vinod Kumar
- Department of Botany, Government College for Women, Gandhi Nagar, Jammu 180004, Jammu & Kashmir, India.
| | - Renu Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University Amritsar, 143005, Punjab, India
| |
Collapse
|
132
|
Rinkinen T, Kinnula M, Nordquist H. Technological development roles and needs in pre-hospital emergency care from the advanced level paramedics' perspective. Int Emerg Nurs 2024; 73:101406. [PMID: 38266321 DOI: 10.1016/j.ienj.2024.101406] [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: 06/16/2023] [Revised: 11/16/2023] [Accepted: 01/08/2024] [Indexed: 01/26/2024]
Abstract
INTRODUCTION The work environment of paramedics is rapidly becoming more technology-oriented, and new innovations are constantly being introduced. The aim of this study was to determine the roles Finnish advanced level paramedics identify for themselves within technological development processes in their experience and what kinds of technological development in pre-hospital emergency care are needed. METHODS This qualitative study utilised essay material written by experienced advanced level paramedics (n = 20), which was analysed using inductive content analysis. RESULTS The paramedics identified direct and indirect roles and clear obstacles. The roles were related to expertise, their own professional skills, supporting development and implementation. The obstacles to participation in technological developed were perceived as the employer's unwillingness to involve grassroots level paramedics, lack of training or expertise, and overall unrecognised role. Technological development was seen to be needed regarding information and communication technology, treatment tools, and equipment. Further, nationally homogenous technological development that supports the quality and safety of nursing work and the integration of digitalization into education were also seen as needed. CONCLUSIONS Paramedics can be innovative and active technology developers with extensive expertise in the technology of their field. Employers and technology developers should be encouraged to enable user-oriented product development and to involve paramedics in development work.
Collapse
Affiliation(s)
- Tuomo Rinkinen
- Emergency Medical Services, University of Turku and Turku University Hospital, Finland.
| | - Marianne Kinnula
- University of Oulu, Faculty of Information Technology and Electrical Engineering, Interact Research Unit, Finland.
| | - Hilla Nordquist
- South-Eastern Finland University of Applied Sciences, Department of Healthcare and Emergency Care, Finland.
| |
Collapse
|
133
|
Lusiastuti AM, Suhermanto A, Hastilestari BR, Suryanto S, Mawardi M, Sugiani D, Syahidah D, Sudaryatma PE, Caruso D. Impact of temperature on the virulence of Streptococcus agalactiae in Indonesian aquaculture: A better vaccine design is required. Vet World 2024; 17:682-689. [PMID: 38680157 PMCID: PMC11045521 DOI: 10.14202/vetworld.2024.682-689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 02/28/2024] [Indexed: 05/01/2024] Open
Abstract
Due to their poikilothermic nature, fish are very sensitive to changes in temperature. Due to climate change, the average global temperature has increased by 1.5°C in the last century, which may have caused an increase in farmed fish mortality recently. Predictions using the model estimate that a 1°C increase in temperature could cause 3%-4% and 4%-6% mortality due to infectious diseases in organisms living in warm and temperate waters, respectively. There is a need to determine whether there is a relationship between increasing environmental temperature and disease virulence. This review examines the influence and impact of increasing temperatures due to climate change on the physiology and pathogenicity of Streptococcus agalactiae, which causes streptococcosis in tilapia and causes significant economic losses. Changes in the pathogenicity of S. agalactiae, especially its virulence properties due to increasing temperature, require changes in the composition design of the fish vaccine formula to provide better protection through the production of protective antibodies.
Collapse
Affiliation(s)
- Angela Mariana Lusiastuti
- Research Center for Veterinary Sciences, National Research and Innovation Agency, KST BRIN Soekarno Cibinong Bogor, 16911, Jawa Barat, Indonesia
| | - Achmad Suhermanto
- The Marine and Fisheries Polytechnic Karawang, The Ministry of Marine Affairs and Fisheries Indonesia
| | | | - Suryanto Suryanto
- Research Center for Fisheries, National Research and Innovation Agency, Indonesia
| | - Mira Mawardi
- Main Center for Freshwater Aquaculture – The Ministry of Marine Affairs and Fisheries, Jl. Selabintana No. 37, Selabatu, Kec. Cikole, Kota Sukabumi, Jawa Barat 43114, Indonesia
| | - Desy Sugiani
- Research Center for Veterinary Sciences, National Research and Innovation Agency, KST BRIN Soekarno Cibinong Bogor, 16911, Jawa Barat, Indonesia
| | - Dewi Syahidah
- Research Center for Veterinary Sciences, National Research and Innovation Agency, KST BRIN Soekarno Cibinong Bogor, 16911, Jawa Barat, Indonesia
| | | | - Domenico Caruso
- ISEM, Univ. Montpellier, CNRS, EPHE, IRD, Montpellier, France
| |
Collapse
|
134
|
Barone F, Bunea I, Creel K, Sharma R, Amaral J, Maminishkis A, Bharti K. An Automated Visual Psychophysics Method to Measure Visual Function in Swine Preclinical Animal Model. Transl Vis Sci Technol 2024; 13:8. [PMID: 38470318 PMCID: PMC10941991 DOI: 10.1167/tvst.13.3.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 01/28/2024] [Indexed: 03/13/2024] Open
Abstract
Purpose The aim of this study was to develop and validate a test to assess visual function in pigs using the visual psychophysics contrast sensitivity function. Methods We utilized a touchscreen along with a pellet reward dispenser to train three Göttingen pigs on a visual psychophysics test and determined their contrast sensitivity function. Images with different contrast resolutions were used as visual stimuli and presented against a control image in a two-choice test. Following animals' acclimatization and the first phase of training, the system was arranged such that animals could self-run multiple consecutive trials without human intervention. Results All animals were trained within a week and remembered the task with 1 day of reinforcement when tested 1 month after the last visual assessment. All trained animals performed well during the trial with minimal screen side bias, especially at contrast threshold above 40%. Conclusions Göttingen pigs are trainable for a visual psychophysics test and able to self-run the trial without human intervention. Translational Relevance Contrast sensitivity is one of the key parameters to assess visual function in humans. The possibility of measuring the same parameters in a large animal model allows for a better translation and understanding of drug safety and efficacy in preclinical ophthalmology.
Collapse
Affiliation(s)
- Francesca Barone
- Ocular and Stem Cell Translational Research Section, National Eye Institute, NIH, Bethesda, MD, USA
| | - Irina Bunea
- Ocular and Stem Cell Translational Research Section, National Eye Institute, NIH, Bethesda, MD, USA
| | - Kristi Creel
- Ocular and Stem Cell Translational Research Section, National Eye Institute, NIH, Bethesda, MD, USA
| | - Ruchi Sharma
- Ocular and Stem Cell Translational Research Section, National Eye Institute, NIH, Bethesda, MD, USA
| | - Juan Amaral
- Ocular and Stem Cell Translational Research Section, National Eye Institute, NIH, Bethesda, MD, USA
| | - Arvydas Maminishkis
- Translational Research Core, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, NIH, Bethesda, MD, USA
| | - Kapil Bharti
- Ocular and Stem Cell Translational Research Section, National Eye Institute, NIH, Bethesda, MD, USA
| |
Collapse
|
135
|
Flechas Becerra C, Barrios Silva LV, Ahmed E, Bear JC, Feng Z, Chau DY, Parker SG, Halligan S, Lythgoe MF, Stuckey DJ, Patrick PS. X-Ray Visible Protein Scaffolds by Bulk Iodination. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306246. [PMID: 38145968 PMCID: PMC10933627 DOI: 10.1002/advs.202306246] [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: 09/01/2023] [Revised: 11/18/2023] [Indexed: 12/27/2023]
Abstract
Protein-based biomaterial use is expanding within medicine, together with the demand to visualize their placement and behavior in vivo. However, current medical imaging techniques struggle to differentiate between protein-based implants and surrounding tissue. Here a fast, simple, and translational solution for tracking transplanted protein-based scaffolds is presented using X-ray CT-facilitating long-term, non-invasive, and high-resolution imaging. X-ray visible scaffolds are engineered by selectively iodinating tyrosine residues under mild conditions using readily available reagents. To illustrate translatability, a clinically approved hernia repair mesh (based on decellularized porcine dermis) is labeled, preserving morphological and mechanical properties. In a mouse model of mesh implantation, implants retain marked X-ray contrast up to 3 months, together with an unchanged degradation rate and inflammatory response. The technique's compatibility is demonstrated with a range of therapeutically relevant protein formats including bovine, porcine, and jellyfish collagen, as well as silk sutures, enabling a wide range of surgical and regenerative medicine uses. This solution tackles the challenge of visualizing implanted protein-based biomaterials, which conventional imaging methods fail to differentiate from endogenous tissue. This will address previously unanswered questions regarding the accuracy of implantation, degradation rate, migration, and structural integrity, thereby accelerating optimization and safe translation of therapeutic biomaterials.
Collapse
Affiliation(s)
- Carlos Flechas Becerra
- Centre for Advanced Biomedical ImagingDivision of MedicineUniversity College LondonPaul O'Gorman Building, 72 Huntley StreetLondonWC1E 6DDUK
| | - Lady V. Barrios Silva
- Division of Biomaterials and Tissue EngineeringEastman Dental InstituteUniversity College LondonRoyal Free HospitalRowland Hill StreetLondonNW3 2PFUK
| | - Ebtehal Ahmed
- Centre for Advanced Biomedical ImagingDivision of MedicineUniversity College LondonPaul O'Gorman Building, 72 Huntley StreetLondonWC1E 6DDUK
| | - Joseph C. Bear
- School of Life SciencePharmacy & ChemistryKingston UniversityPenrhyn RoadKingston upon ThamesKT1 2EEUK
| | - Zhiping Feng
- Centre for Advanced Biomedical ImagingDivision of MedicineUniversity College LondonPaul O'Gorman Building, 72 Huntley StreetLondonWC1E 6DDUK
| | - David Y.S. Chau
- Division of Biomaterials and Tissue EngineeringEastman Dental InstituteUniversity College LondonRoyal Free HospitalRowland Hill StreetLondonNW3 2PFUK
| | - Samuel G. Parker
- Centre for Medical Imaging, Division of MedicineUniversity College London UCLCharles Bell House, 43–45 Foley StreetLondonW1W 7TSUK
| | - Steve Halligan
- Centre for Medical Imaging, Division of MedicineUniversity College London UCLCharles Bell House, 43–45 Foley StreetLondonW1W 7TSUK
| | - Mark F. Lythgoe
- Centre for Advanced Biomedical ImagingDivision of MedicineUniversity College LondonPaul O'Gorman Building, 72 Huntley StreetLondonWC1E 6DDUK
| | - Daniel J. Stuckey
- Centre for Advanced Biomedical ImagingDivision of MedicineUniversity College LondonPaul O'Gorman Building, 72 Huntley StreetLondonWC1E 6DDUK
| | - P. Stephen Patrick
- Centre for Advanced Biomedical ImagingDivision of MedicineUniversity College LondonPaul O'Gorman Building, 72 Huntley StreetLondonWC1E 6DDUK
| |
Collapse
|
136
|
Roos G, Murray JS. Probing intramolecular interactions using molecular electrostatic potentials: changing electron density contours to unveil both attractive and repulsive interactions. Phys Chem Chem Phys 2024; 26:7592-7601. [PMID: 38362927 DOI: 10.1039/d3cp06005e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
We focus on intramolecular interactions, using the electrostatic potential plotted on iso-density surfaces to lead the way. We show that plotting the electrostatic potential on varying iso-density envelopes much closer to the nuclei than the commonly used 0.001 a.u. contour can reveal the driving forces for such interactions, whether they be stabilizing or destabilizing. Our approach involves optimizing the structures of molecules exhibiting intramolecular interactions and then finding the contour of the electronic density which allows the interacting atoms to be separated; we call this the nearly-touching contour. The electrostatic potential allows then to identify the intramolecular interactions as either attractive or repulsive. The discussed 1,5- and 1,6-intramolecular interactions in o-bromophenol and o-nitrophenol are attractive, while the interactions between terminal methyl hydrogens in diethyl disulfides (as shown recently) and those between the closest hydrogens in planar biphenyl and phenanthrene are clearly repulsive in nature. For the attractive 1,4-interactions in trinitromethane and chlorotrinitromethane, and the 1,3-S⋯N and the 1,4-Si⋯N interactions in the ClH2Si(CH2)nNH2 series, the lack of (3,-1) bond critical points has often been cited as reason to not identify such interactions as attractive in nature. Here, by looking at the nearly-touching contours we see that bond critical points are neither necessary nor sufficient for attractive interactions, as others have pointed out, and in some instances also pointing to repulsive interactions, as the examples of planar biphenyl and phenanthrene discussed in this work show.
Collapse
Affiliation(s)
- Goedele Roos
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France
| | - Jane S Murray
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA.
| |
Collapse
|
137
|
Maaitah W, Abdelhay O, Tourkmani A, Azzeh M, Abu-Soud MS, Atiani S. Telemedicine interventions in type 2 diabetes management: a protocol for systematic review and network meta-analysis. BMJ Open 2024; 14:e078100. [PMID: 38388501 PMCID: PMC10884257 DOI: 10.1136/bmjopen-2023-078100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 01/08/2024] [Indexed: 02/24/2024] Open
Abstract
INTRODUCTION The consequences of type 2 diabetes mellitus (T2DM) heavily strain individuals and healthcare systems worldwide. Interventions via telemedicine have become a potential tactic to tackle the difficulties in effectively managing T2DM. However, more research is needed to determine how telemedicine interventions affect T2DM management. This study sets out to systematically analyse and report the effects of telemedicine treatments on T2DM management to gain essential insights into the potential of telemedicine as a cutting-edge strategy to improve the outcomes and care delivery for people with T2DM. METHODS AND ANALYSIS To uncover relevant research, we will perform a comprehensive literature search across six databases (PubMed, IEEE, EMBASE, Web of Science, Google Scholar and Cochrane Library). Each piece of data will be extracted separately, and any discrepancies will be worked out through discussion or by a third reviewer. The studies included are randomised controlled trial. We chose by predefined inclusion standards. After the telemedicine intervention, glycated haemoglobin will be the primary outcome. The Cochrane risk-of-bias approach will be used to evaluate the quality of the included studies. RevMan V.5.3.5 software and RStiduo V.4.3.1 software can be used to analyse the data, including publication bias. ETHICS AND DISSEMINATION Since this research will employ publicly accessible documents, ethical approval is unnecessary. The review is registered prospectively on the PROSPERO database. The study's findings will be published in a peer-reviewed journal. PROSPERO REGISTRATION NUMBER CRD42023421719.
Collapse
Affiliation(s)
- Wasan Maaitah
- Department of Data Science, Princess Sumaya University for Technology, Amman, Jordan
| | - Osama Abdelhay
- Department of Data Science, Princess Sumaya University for Technology, Amman, Jordan
| | - Ayla Tourkmani
- Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Mohammad Azzeh
- Department of Data Science, Princess Sumaya University for Technology, Amman, Jordan
| | - Mohammad S Abu-Soud
- Department of Data Science, Princess Sumaya University for Technology, Amman, Jordan
| | - Serin Atiani
- Department of Data Science, Princess Sumaya University for Technology, Amman, Jordan
| |
Collapse
|
138
|
Denton O, Wan Y, Beattie L, Jack T, McGoldrick P, McAllister H, Mullan C, Douglas CM, Shu W. Understanding the Role of Biofilms in Acute Recurrent Tonsillitis through 3D Bioprinting of a Novel Gelatin-PEGDA Hydrogel. Bioengineering (Basel) 2024; 11:202. [PMID: 38534476 DOI: 10.3390/bioengineering11030202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/15/2024] [Accepted: 02/18/2024] [Indexed: 03/28/2024] Open
Abstract
Acute recurrent tonsillitis is a chronic, biofilm-related infection that is a significant burden to patients and healthcare systems. It is often treated with repeated courses of antibiotics, which contributes to antimicrobial resistance. Studying biofilms is key to understanding this disease. In vitro modelling using 3D bioprinted hydrogels is a promising approach to achieve this. A novel gelatin-PEGDA pseudomonas fluorescens-laden bioink was developed and bioprinted in a 3D hydrogel construct fabricated using computer-aided design to mimic the tonsillar biofilm environment. The bioprinted constructs were cultured at 37 °C in lysogeny broth for 12 days. Bacterial growth was assessed by spectrophotometry. Cellular viability analysis was conducted using optical fluorescence microscopy (FDA/PI staining). A biocompatible 3D-printed bacteria-laden hydrogel construct was successfully fabricated. Bacterial growth was observed using optical fluorescence microscopy. A live/dead cellular-staining protocol demonstrated bacterial viability. Results obtained after the 12-day culture period showed higher bacterial growth in the 1% gelatin concentration construct compared to the 0% control. This study demonstrates the first use of a bacteria-laden gelatin-PEGDA hydrogel for biofabrication of a 3D-printed construct designed to model acute recurrent tonsillitis. Initiating a study with clinically relevant ex vivo tonsil bacteria will be an important next step in improving treatment of this impactful but understudied disease.
Collapse
Affiliation(s)
- Oliver Denton
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
- Department of Otolaryngology/ENT Surgery, NHS Greater Glasgow and Clyde, Glasgow G51 4TF, UK
- Department of Medicine, University of Glasgow, Glasgow G12 8QQ, UK
| | - Yifei Wan
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
| | - Laura Beattie
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
| | - Téa Jack
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
| | - Preston McGoldrick
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
| | - Holly McAllister
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
| | - Cara Mullan
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
| | - Catriona M Douglas
- Department of Otolaryngology/ENT Surgery, NHS Greater Glasgow and Clyde, Glasgow G51 4TF, UK
- Department of Medicine, University of Glasgow, Glasgow G12 8QQ, UK
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | - Wenmiao Shu
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK
| |
Collapse
|
139
|
Chen H, Xu H, Zhong C, Liu M, Yang L, He J, Sun Y, Zhao C, Wang D. Treatment of landfill leachate by coagulation: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169294. [PMID: 38110093 DOI: 10.1016/j.scitotenv.2023.169294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/06/2023] [Accepted: 12/09/2023] [Indexed: 12/20/2023]
Abstract
Landfill leachate is a seriously polluted and hazardous liquid, which contains a high concentration of refractory organics, ammonia nitrogen, heavy metals, inorganic salts, and various suspended solids. The favorable disposal of landfill leachate has always been a hot and challenging issue in wastewater treatment. As one of the best available technologies for landfill leachate disposal, coagulation has been studied extensively. However, there is an absence of a systematic review regarding coagulation in landfill leachate treatment. In this paper, a review focusing on the characteristics, mechanisms, and application of coagulation in landfill leachate treatment was provided. Different coagulants and factors influencing the coagulation effect were synthetically summarized. The performance of coagulation coupled with other processes and their complementary advantages were elucidated. Additionally, the economic analysis conducted in this study suggests the cost-effectiveness of the coagulation process. Based on previous studies, challenges and perspectives met by landfill leachate coagulation treatment were also put forward. Overall, this review will provide a reference for the coagulation treatment of landfill leachate and promote the development of efficient and eco-friendly leachate treatment technology.
Collapse
Affiliation(s)
- Hongni Chen
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Hui Xu
- Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, School of Materials and Environment, Guangxi Minzu University, Nanning 530006, China
| | - Chao Zhong
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Mingjie Liu
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Liwei Yang
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Jiaojie He
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Yan Sun
- School of Civil Engineering, Chang'an University, Xi'an 710061, China
| | - Chuanliang Zhao
- School of Civil Engineering, Chang'an University, Xi'an 710061, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Dongsheng Wang
- College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
140
|
Xu X, Guo L, Park J, Dong X, Liu X, Wang X. Large-scale laboratory investigation of the performance of a novel isolation particle layer for offshore final disposal sites. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 174:340-350. [PMID: 38091658 DOI: 10.1016/j.wasman.2023.12.013] [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: 07/23/2023] [Revised: 10/13/2023] [Accepted: 12/06/2023] [Indexed: 01/16/2024]
Abstract
The complex seabed conditions and ocean environment pose significant challenges to the material selection and construction of bottom liners for offshore final disposal sites. To overcome the challenges, this study proposed a novel isolation particle layer for offshore final disposal sites. The isolation particle was composed by salt-resistant bentonite coating material and cement core material (D10 was 10 mm in core diameter and 2 mm in coating thickness; D20 was 20 mm and 4 mm). Upon immersion in artificial seawater, the isolation particles underwent expansion, leading to the formation of the novel isolation particle layers with low hydraulic conductivity less than 1 × 10-7 cm/s and adsorption of heavy metals in bentonite interlayers. Large column tests showed that both D10 and D20 isolation particle layers exhibited remarkable swelling capacity and low hydraulic conductivity (4.3 × 10-9 cm/s and 2.6 × 10-8 cm/s) under 3 m seawater pressure. During one year of observation, water tank test demonstrated that both isolation particle layers displayed remarkable stability and low hydraulic conductivity of 2.73 × 10-10 cm/s and 8.36 × 10-10 cm/s with load. The maximum adsorption capacities of salt-resistant bentonite were 123.55 mg/g for Pb2+, 60.29 mg/g for Cd2+ and 54.22 mg/g for Cu2+. Both isolation particle layers exhibited a high removal rate of over 95 % for heavy metals in water tank tests. The large-scale laboratory tests indicated the significant potential of the novel isolation particle layer for offshore final disposal sites. Subsequently, a testing ocean site will be selected to further investigate its practical engineering performance.
Collapse
Affiliation(s)
- Xin Xu
- College of Construction Engineering, Jilin University, Changchun 130026, China.
| | - Lisheng Guo
- College of Construction Engineering, Jilin University, Changchun 130026, China
| | - Junboum Park
- Department of Civil and Environment Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Xiaoqiang Dong
- College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Xiaofeng Liu
- College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Xinhai Wang
- College of Construction Engineering, Jilin University, Changchun 130026, China
| |
Collapse
|
141
|
Batool S, Liaqat U, Hussain Z. Preparation and physicochemical characterization of whitlockite/PVA/Gelatin composite for bone tissue regeneration. Front Chem 2024; 12:1355545. [PMID: 38420578 PMCID: PMC10900066 DOI: 10.3389/fchem.2024.1355545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 01/22/2024] [Indexed: 03/02/2024] Open
Abstract
This work used a straightforward solvent casting approach to synthesize bone whitlockite (WH) based PVA/Gelatin composites. WH nanoparticles (NPs) were synthesized using the wet precipitation method, followed by their addition into the PVA/Gelatin matrix at concentrations from 1% to 10%. The physicochemical characterization of the prepared PVA/Gelatin/WH composite was carried out using ATR-FTIR, Optical profilometry, a Goniometer, a Universal tensile testing machine (UTM), and scanning electron microscopy (SEM) techniques. The ATR-FTIR analysis confirmed the formation of noncovalent interactions between polymeric chains and WH NPs and the incorporation of WH NPs into the polymer cavities. SEM analysis demonstrated increased surface roughness with the addition of WH NPs, supporting the results obtained through optical profilometry analysis. The mechanical properties of the prepared composite showed an increase in the tensile strength with the addition of WH filler up to 7% loading. The prepared composite has demonstrated an excellent swelling ability and surface wettability. The reported results demonstrate the exceptional potential of the prepared composite for bone tissue regeneration.
Collapse
Affiliation(s)
- Sadaf Batool
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Usman Liaqat
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Zakir Hussain
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| |
Collapse
|
142
|
Bhar B, Ranta P, Samudrala PK, Mandal BB. Omentum Extracellular Matrix-Silk Fibroin Hydroscaffold Promotes Wound Healing through Vascularization and Tissue Remodeling in the Diabetic Rat Model. ACS Biomater Sci Eng 2024; 10:1090-1105. [PMID: 38275123 DOI: 10.1021/acsbiomaterials.3c01877] [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] [Indexed: 01/27/2024]
Abstract
Nonhealing diabetic wounds are often associated with significant mortality and cause economic and clinical burdens to the healthcare system. Herein, a biomimetic hydroscaffold is developed using omentum tissue-derived decellularized-extracellular matrix (dECM) and silk fibroin (SF) proteins that associate the behavior of a collagenous fibrous scaffold and a hydrogel to reproduce all aspects of the provisional skin tissue matrix. The chemical cross-linker-free in situ gelation property of the two types of SF proteins from Bombyx mori and Antheraea assamensis ensures the adherence of dECM with surrounding tissue on the wound bed, circumventing further suturing. The physicochemical and mechanical properties of the composite hydroscaffold (SF-dECM) were thoroughly evaluated. The hydroscaffolds were found to support the growth and proliferation of human dermal fibroblasts and influence the angiogenic potential of endothelial cells under in vitro conditions. Furthermore, the healing efficacy of the composites was evaluated by generating full-thickness wounds on a streptozotocin-induced diabetic rat model. The presence of dECM components in the composite facilitated the rate of wound closure, granulation tissue formation, and re-epithelialization by providing intrinsic cues to advance the inflammatory stage and stimulating angiogenesis. Collectively, as an off-the-shelf wound dressing requiring only a single topical administration, the SF-dECM hydroscaffold is a promising, cost-effective dressing for the management of chronic diabetic wounds.
Collapse
Affiliation(s)
- Bibrita Bhar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Priyanka Ranta
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical and Educational Research Guwahati, Guwahati, Assam 781101, India
| | - Pavan Kumar Samudrala
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical and Educational Research Guwahati, Guwahati, Assam 781101, India
| | - Biman B Mandal
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Jyoti and Bhupat Mehta School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| |
Collapse
|
143
|
Chowdhury SR, Mondal G, Ratnayake P, Basu B. Three-Dimensional Extrusion Printed Urinary Specific Grafts: Mechanistic Insights into Buildability and Biophysical Properties. ACS Biomater Sci Eng 2024; 10:1040-1061. [PMID: 38294204 DOI: 10.1021/acsbiomaterials.3c01422] [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] [Indexed: 02/01/2024]
Abstract
The compositional formulations and the optimization of process parameters to fabricate hydrogel scaffolds with urological tissue-mimicking biophysical properties are not yet extensively explored, including a comprehensive assessment of a spectrum of properties, such as mechanical strength, viscoelasticity, antimicrobial property, and cytocompatibility. While addressing this aspect, the present work provides mechanistic insights into process science, to produce shape-fidelity compliant alginate-based biomaterial ink blended with gelatin and synthetic nanocellulose. The composition-dependent pseudoplasticity, viscoelasticity, thixotropy, and gel stability over a longer duration in physiological context have been rationalized in terms of intermolecular hydrogen bonding interactions among the biomaterial ink constituents. By varying the hybrid hydrogel ink composition within a narrow compositional window, the resulting hydrogel closely mimics the natural urological tissue-like properties, including tensile stretchability, compressive strength, and biophysical properties. Based on the printability assessment using a critical analysis of gel strength, we have established the buildability of the acellular hydrogel ink and have been successful in fabricating shape-fidelity compliant urological patches or hollow cylindrical grafts using 3D extrusion printing. Importantly, the new hydrogel formulations with good hydrophilicity, support fibroblast cell proliferation and inhibit the growth of Gram-negative E. coli bacteria. These attributes were rationalized in terms of nanocellulose-induced physicochemical changes on the scaffold surface. Taken together, the present study uncovers the process-science-based understanding of the 3D extrudability of the newly formulated alginate-gelatin-nanocellulose-based hydrogels with urological tissue-specific biophysical, cytocompatibility, and antibacterial properties.
Collapse
Affiliation(s)
- Sulob Roy Chowdhury
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Garga Mondal
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Praneeth Ratnayake
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Bikramjit Basu
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| |
Collapse
|
144
|
Hassan J, Saeed SM, Deka L, Uddin MJ, Das DB. Applications of Machine Learning (ML) and Mathematical Modeling (MM) in Healthcare with Special Focus on Cancer Prognosis and Anticancer Therapy: Current Status and Challenges. Pharmaceutics 2024; 16:260. [PMID: 38399314 PMCID: PMC10892549 DOI: 10.3390/pharmaceutics16020260] [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: 12/08/2023] [Revised: 01/29/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
The use of data-driven high-throughput analytical techniques, which has given rise to computational oncology, is undisputed. The widespread use of machine learning (ML) and mathematical modeling (MM)-based techniques is widely acknowledged. These two approaches have fueled the advancement in cancer research and eventually led to the uptake of telemedicine in cancer care. For diagnostic, prognostic, and treatment purposes concerning different types of cancer research, vast databases of varied information with manifold dimensions are required, and indeed, all this information can only be managed by an automated system developed utilizing ML and MM. In addition, MM is being used to probe the relationship between the pharmacokinetics and pharmacodynamics (PK/PD interactions) of anti-cancer substances to improve cancer treatment, and also to refine the quality of existing treatment models by being incorporated at all steps of research and development related to cancer and in routine patient care. This review will serve as a consolidation of the advancement and benefits of ML and MM techniques with a special focus on the area of cancer prognosis and anticancer therapy, leading to the identification of challenges (data quantity, ethical consideration, and data privacy) which are yet to be fully addressed in current studies.
Collapse
Affiliation(s)
- Jasmin Hassan
- Drug Delivery & Therapeutics Lab, Dhaka 1212, Bangladesh; (J.H.); (S.M.S.)
| | | | - Lipika Deka
- Faculty of Computing, Engineering and Media, De Montfort University, Leicester LE1 9BH, UK;
| | - Md Jasim Uddin
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Diganta B. Das
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK
| |
Collapse
|
145
|
Gupta SK, Lakshmi P, Chakrapani V, Rastogi A, Kaur M. Understanding the diabetes self-care behaviour in rural areas: Perspective of patients with type 2 diabetes mellitus and healthcare professionals. PLoS One 2024; 19:e0297132. [PMID: 38330094 PMCID: PMC10852243 DOI: 10.1371/journal.pone.0297132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 12/28/2023] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND Diabetes self-care behaviour plays a crucial role in managing the diabetes effectively and preventing complications. Patients with type 2 diabetes mellitus (T2DM) and health care professionals (HCPs) of rural areas often face unique challenges when it comes to diabetes self-care practices (SCPs). Therefore, this study aim to explore the perspectives of patients with T2DM and HCPs on diabetes SCPs. METHODS Eight focus group discussions (FGDs) among individuals with T2DM and In-depth interviews (IDIs) with 15 HCPs were conducted in rural areas of Punjab, North India. Capability, Opportunity, Motivation, and Behaviour model (COM-B) was employed for thematic framework analyses. RESULTS The study participants perceived that a limited understanding of diabetes mellitus (DM), beliefs in alternative therapies, drug side effects, attitudes towards DM (psychological capability), comorbidities (physical capability), family support (social opportunity), financial and time constraints, and weather conditions (physical opportunity) contributed to lack of DM SCPs. Physicians' guidance and support were motivating them to adhere to SCPs, especially when aligned with their sense of self-efficacy (reflective motivation). HCPs constraints in providing patient-centred care are due to training limitations (psychological capability) and a lack of essential resources (physical opportunities). Participants expressed need for comprehensive diabetes care (automatic motivation) through structured diabetes education intervention to improve diabetes SCPs. CONCLUSIONS The study findings indicate that various factors influence diabetes SCPs from the perspectives of both patients with T2DM and HCPs and emphasizes the need for a multi-faceted approach to improve diabetes SCPs in rural areas. Implementing a structured diabetes self-care intervention strategy in rural areas may help for preventing and mitigating the impact of diabetes-related complications in rural areas.
Collapse
Affiliation(s)
- Saurabh Kumar Gupta
- Department of Community Medicine and School of Public Health, Post-Graduate Institute of Medical Education and Research, Chandigarh, India
| | - P.V.M. Lakshmi
- Department of Community Medicine and School of Public Health, Post-Graduate Institute of Medical Education and Research, Chandigarh, India
| | | | - Ashu Rastogi
- Department of Endocrinology, Post-Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Manmeet Kaur
- Department of Community Medicine and School of Public Health, Post-Graduate Institute of Medical Education and Research, Chandigarh, India
- HEAL Foundation, Chandigarh, India
| |
Collapse
|
146
|
Słabońska J, Sappati S, Marciniak A, Czub J. Low-Barrier Hydrogen Bond Determines Target-Binding Affinity and Specificity of the Antitubercular Drug Bedaquiline. ACS Med Chem Lett 2024; 15:265-269. [PMID: 38352844 PMCID: PMC10860170 DOI: 10.1021/acsmedchemlett.3c00509] [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: 11/13/2023] [Revised: 12/16/2023] [Accepted: 12/19/2023] [Indexed: 02/16/2024] Open
Abstract
The role of short strong hydrogen bonds (SSHBs) in ligand-target binding remains largely unexplored, thereby hindering a potentially important avenue in rational drug design. Here we investigate the interaction between the antituberculosis drug bedaquiline (Bq) and the mycobacterial ATP synthase to unravel the role of a specific hydrogen bond to a conserved acidic residue in the target affinity and specificity. Our ab initio molecular dynamics simulations reveal that this bond belongs to the SSHB category and accounts for a substantial fraction of the target binding free energy. We also demonstrate that the presence of an extra acidic residue, i.e., aspartic acid at position 32 (D32), found exclusively in mycobacteria, cooperatively enhances the HB strength, ensuring specificity for the mycobacterial target. Consistently, we show that the removal of D32 markedly weakens the affinity, leading to Bq resistance associated with mutations of D32 to nonacidic residues. By designing simple Bq analogs, we then explore the possibility to overcome the resistance and potentially broaden the Bq antimicrobial spectrum by making the SSHB independent of the presence of the extra acidic residue.
Collapse
Affiliation(s)
- Joanna Słabońska
- Department
of Physical Chemistry, Gdańsk University
of Technology, Narutowicza St 11/12, Gdańsk 80-233, Poland
| | - Subrahmanyam Sappati
- Department
of Physical Chemistry, Gdańsk University
of Technology, Narutowicza St 11/12, Gdańsk 80-233, Poland
- BioTechMed
Center, Gdańsk University of Technology, Narutowicza St 11/12, Gdańsk 80-233, Poland
| | - Antoni Marciniak
- Department
of Physical Chemistry, Gdańsk University
of Technology, Narutowicza St 11/12, Gdańsk 80-233, Poland
- Department
of Applied Physics, KTH Royal Institute
of Technology, SE-171 65 Solna, Sweden
| | - Jacek Czub
- Department
of Physical Chemistry, Gdańsk University
of Technology, Narutowicza St 11/12, Gdańsk 80-233, Poland
- BioTechMed
Center, Gdańsk University of Technology, Narutowicza St 11/12, Gdańsk 80-233, Poland
| |
Collapse
|
147
|
Sharma V, Gogoi B, Borah SN, Ghosh A, Mazumdar A, Kalita RD. In-silico molecular docking and molecular dynamic simulation of γ-elemene and caryophyllene identified from the essential oil of Kaempferia galanga L. against biofilm forming proteins, CrtM and SarA of Staphylococcus aureus. J Biomol Struct Dyn 2024:1-13. [PMID: 38321959 DOI: 10.1080/07391102.2024.2310773] [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: 08/07/2023] [Accepted: 01/21/2024] [Indexed: 02/08/2024]
Abstract
Medicinal plants play an important role as antimicrobials by inhibiting various key targets of diverse microorganisms. A major antimicrobial component of plants is its essential oil, which are increasingly being studied for their antimicrobial properties as well as for their potential role in the inhibition of biofilm formation. In the present study, essential oil from Kaempferia galanga L was isolated resulting in the identification of eleven compounds. Of these, two of the compounds, γ-elemene and caryophyllene were found to dock with the target proteins, CrtM and SarA of Staphylococcus aureus, which are essential for the formation of biofilm. γ-elemene demonstrated the best binding affinity with CrtM with binding energy of -8.1 kcal/mol whereas caryophyllene and its derivative isocaryophyllene showed the best binding with SarA with binding energy -6.1 kcal/mol. ADMET study of the compounds also revealed that the compounds are non-toxic and can be used as probable compounds for inhibition of biofilms. Molecular dynamic simulation studies revealed high affinity of binding and stability of the molecules with their targets. PCA analysis helped in identifying the principal motions occurring within a trajectory that are essential in inducing conformational changes.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Vanshika Sharma
- Department of Biotechnology, Royal School of Biosciences, The Assam Royal Global University, Guwahati, Assam, India
| | - Bhaskarjyoti Gogoi
- Department of Biotechnology, Royal School of Biosciences, The Assam Royal Global University, Guwahati, Assam, India
| | - Siddhartha Narayan Borah
- Department of Biotechnology, Royal School of Biosciences, The Assam Royal Global University, Guwahati, Assam, India
| | - Arabinda Ghosh
- Department of Computational Biology and Biotechnology, Mahapurusha Srimanta Sankardeva Viswavidyalaya, Nagaon, Assam, India
| | - Ajanita Mazumdar
- Department of Molecular Biology and Biotechnology, Cotton University, Guwahati, Assam, India
| | - Ranjan Dutta Kalita
- Department of Biotechnology, Royal School of Biosciences, The Assam Royal Global University, Guwahati, Assam, India
| |
Collapse
|
148
|
Quinaz T, Freire TF, Olmos A, Martins M, Ferreira FBN, de Moura MFSM, Zille A, Nguyễn Q, Xavier J, Dourado N. The Influence of Hydroxyapatite Crystals on the Viscoelastic Behavior of Poly(vinyl alcohol) Braid Systems. Biomimetics (Basel) 2024; 9:93. [PMID: 38392139 PMCID: PMC10886535 DOI: 10.3390/biomimetics9020093] [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: 12/28/2023] [Revised: 01/28/2024] [Accepted: 01/29/2024] [Indexed: 02/24/2024] Open
Abstract
Composites of poly(vinyl alcohol) (PVA) in the shape of braids, in combination with crystals of hydroxyapatite (HAp), were analyzed to perceive the influence of this bioceramic on both the quasi-static and viscoelastic behavior under tensile loading. Analyses involving energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) allowed us to conclude that the production of a homogeneous layer of HAp on the braiding surface and the calcium/phosphate atomic ratio were comparable to those of natural bone. The maximum degradation temperature established by thermogravimetric analysis (TGA) showed a modest decrease with the addition of HAp. By adding HAp to PVA braids, an increase in the glass transition temperature (Tg) is noticed, as demonstrated by dynamic mechanical analysis (DMA) and differential thermal analysis (DTA). The PVA/HAp composite braids' peaks were validated by Fourier transform infrared (FTIR) spectroscopy to be in good agreement with common PVA and HAp patterns. PVA/HAp braids, a solution often used in the textile industry, showed superior overall mechanical characteristics in monotonic tensile tests. Creep and relaxation testing showed that adding HAp to the eight and six-braided yarn architectures was beneficial. By exhibiting good mechanical performance and most likely increased biological qualities that accompany conventional care for bone applications in the fracture healing field, particularly multifragmentary ones, these arrangements can be applied as a fibrous fixation system.
Collapse
Affiliation(s)
- Tiago Quinaz
- CMEMS-UMinho, Departamento de Engenharia Mecânica, Campus de Azurém, Universidade do Minho, 4804-533 Guimarães, Portugal
| | - Tânia F Freire
- CMEMS-UMinho, Departamento de Engenharia Mecânica, Campus de Azurém, Universidade do Minho, 4804-533 Guimarães, Portugal
| | - Andrea Olmos
- CMEMS-UMinho, Departamento de Engenharia Mecânica, Campus de Azurém, Universidade do Minho, 4804-533 Guimarães, Portugal
| | - Marcos Martins
- INESC TEC, R. Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Fernando B N Ferreira
- 2C2T-Centro de Ciência e Tecnologia Têxtil, Departamento de Engenharia Têxtil, Campus de Azurém, Universidade do Minho, 4804-533 Guimarães, Portugal
| | - Marcelo F S M de Moura
- Departamento de Engenharia Mecânica, Faculdade de Engenharia da Universidade do Porto, 4200-464 Porto, Portugal
| | - Andrea Zille
- 2C2T-Centro de Ciência e Tecnologia Têxtil, Departamento de Engenharia Têxtil, Campus de Azurém, Universidade do Minho, 4804-533 Guimarães, Portugal
| | - Quyền Nguyễn
- 2C2T-Centro de Ciência e Tecnologia Têxtil, Departamento de Engenharia Têxtil, Campus de Azurém, Universidade do Minho, 4804-533 Guimarães, Portugal
| | - José Xavier
- UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- LASI, Intelligent Systems Associate Laboratory, 4800-058 Guimarães, Portugal
| | - Nuno Dourado
- CMEMS-UMinho, Departamento de Engenharia Mecânica, Campus de Azurém, Universidade do Minho, 4804-533 Guimarães, Portugal
- LABBELS-Laboratório Associado, 4710-057 Braga, Portugal
| |
Collapse
|
149
|
Chouteau S, Stafford L, Granier A, Goullet A, Richard-Plouet M. Handling Nanoparticle Content in Nanocomposite Thin Films Deposited by Misty Plasma Processes through Controlled Flash Boiling Atomization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38310517 DOI: 10.1021/acs.langmuir.3c03176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
Misty plasma processes based on colloidal solutions sprayed into low-pressure plasmas have recently shown great potential for multifunctional thin film deposition. In such processes, nanoparticle accumulation in ring-shaped structures remains the main obstacle to the synthesis of high-quality coatings containing abundant, small-scale, and evenly dispersed nanoparticles. These local buildups appear after a colloidal droplet evaporates from a substrate. Accordingly, controlling the droplets' size in the spray is of key importance to ensure a uniform nanoparticle content in the plasma-deposited nanocomposite film. In this work, it is shown that the use of more volatile solvents produces finer droplets on the substrate, thereby improving nanoparticle dispersion in the matrix. A one-dimensional evaporation model is further developed and used to show that, contrary to what one might expect, this result cannot be attributed to faster evaporation during droplet transport in the low-pressure plasma. Instead, a so-called "flash" boiling atomization mechanism is discussed to support the experimental findings.
Collapse
Affiliation(s)
- S Chouteau
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
- Département de physique, Université de Montréal, 1375 Ave. Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - L Stafford
- Département de physique, Université de Montréal, 1375 Ave. Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
| | - A Granier
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
| | - A Goullet
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
| | - M Richard-Plouet
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
| |
Collapse
|
150
|
Zhu K, Yin L, Liu K, Liu J, Shi Y, Li X, Zou H, Du H. Generating synthetic population for simulating the spatiotemporal dynamics of epidemics. PLoS Comput Biol 2024; 20:e1011810. [PMID: 38346079 PMCID: PMC10890746 DOI: 10.1371/journal.pcbi.1011810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 02/23/2024] [Accepted: 01/08/2024] [Indexed: 02/25/2024] Open
Abstract
Agent-based models have gained traction in exploring the intricate processes governing the spread of infectious diseases, particularly due to their proficiency in capturing nonlinear interaction dynamics. The fidelity of agent-based models in replicating real-world epidemic scenarios hinges on the accurate portrayal of both population-wide and individual-level interactions. In situations where comprehensive population data are lacking, synthetic populations serve as a vital input to agent-based models, approximating real-world demographic structures. While some current population synthesizers consider the structural relationships among agents from the same household, there remains room for refinement in this domain, which could potentially introduce biases in subsequent disease transmission simulations. In response, this study unveils a novel methodology for generating synthetic populations tailored for infectious disease transmission simulations. By integrating insights from microsample-derived household structures, we employ a heuristic combinatorial optimizer to recalibrate these structures, subsequently yielding synthetic populations that faithfully represent agent structural relationships. Implementing this technique, we successfully generated a spatially-explicit synthetic population encompassing over 17 million agents for Shenzhen, China. The findings affirm the method's efficacy in delineating the inherent statistical structural relationship patterns, aligning well with demographic benchmarks at both city and subzone tiers. Moreover, when assessed against a stochastic agent-based Susceptible-Exposed-Infectious-Recovered model, our results pinpointed that variations in population synthesizers can notably alter epidemic projections, influencing both the peak incidence rate and its onset.
Collapse
Affiliation(s)
- Kemin Zhu
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Ling Yin
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Kang Liu
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Junli Liu
- Hangzhou Institute of Technology, Xidian University, Hangzhou, China
| | - Yepeng Shi
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Xuan Li
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Hongyang Zou
- College of Management and Economics, Tianjin University, Tianjin, China
- National Industry-Education Platform of Energy Storage, Tianjin University, Tianjin, China
| | - Huibin Du
- College of Management and Economics, Tianjin University, Tianjin, China
- National Industry-Education Platform of Energy Storage, Tianjin University, Tianjin, China
| |
Collapse
|