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Yu S, Budtova T. Creating and exploring carboxymethyl cellulose aerogels as drug delivery devices. Carbohydr Polym 2024; 332:121925. [PMID: 38431419 DOI: 10.1016/j.carbpol.2024.121925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 01/16/2024] [Accepted: 02/05/2024] [Indexed: 03/05/2024]
Abstract
Carboxymethyl cellulose (CMC) is a well-known cellulose derivative used in biomedical applications due to its biocompatibility and biodegradability. In this work, novel porous CMC materials, aerogels, were prepared and tested as a drug delivery device. CMC aerogels were made from CMC solutions, followed by non-solvent induced phase separation and drying with supercritical CO2. The influence of CMC characteristics and of processing conditions on aerogels' density, specific surface area, morphology and drug release properties were investigated. Freeze-drying of CMC solutions was also used as an alternative process to compare the properties of the as-obtained "cryogels" with those of aerogels. Aerogels were nanostructured materials with bulk density below 0.25 g/cm3 and high specific surface area up to 143 m2/g. Freeze drying yields highly macroporous materials with low specific surface areas (around 5-18 m2/g) and very low density, 0.01 - 0.07g/cm3. Swelling and dissolution of aerogels and cryogels in water and in a simulated wound exudate (SWE) were evaluated. The drug was loaded in aerogels and cryogels, and release kinetics in SWE was investigated. Drug diffusion coefficients were correlated with material solubility, morphology, density, degree of substitution and drying methods, demonstrating tuneability of new materials' properties in view of their use as delivery matrices.
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Affiliation(s)
- Sujie Yu
- Mines Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, Rue Claude Daunesse, 06904 Sophia Antipolis, France
| | - Tatiana Budtova
- Mines Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, Rue Claude Daunesse, 06904 Sophia Antipolis, France.
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2
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Ismail MYA, Abdalla ZAY, Njoroge EG, Hlatshwayo TT, Malherbe JB, Innocent AJ, Elnour HMAM. Study of the effect of implantation temperature on the migration behaviour of Xe implanted into glassy carbon. Appl Radiat Isot 2024; 206:111239. [PMID: 38402845 DOI: 10.1016/j.apradiso.2024.111239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 02/27/2024]
Abstract
The effect of implantation temperature on the migration behaviour of xenon (Xe) implanted into glassy carbon and the effect of annealing on radiation damage retained by ion implantation were investigated. Glassy carbon substrates were implanted with 320 keV Xe+ to a fluence of 2 × 1016 cm-2. The implantation process was performed at room temperature (RT) and 100 °C Some of the as-implanted samples were isochronally annealed in vacuum at temperatures ranging from 300 °C to 700 °C in steps of 100 °C for 10 h. The as-implanted and annealed samples were characterized using Rutherford backscattering spectrometry (RBS) and Raman spectroscopy. The RT implanted depth profiles indicated that the migration of Xe towards the surface of glassy carbon was accompanied by a loss of Xe ions. The samples implanted at 100 °C indicated no diffusion or loss of Xe after annealing at 300 °C. However, annealing at temperatures ranging from 400 °C to 700 °C resulted in a slight shift in the Xe profile tail-end towards the bulk of glassy carbon. The diffusion coefficients (D) in the temperature range of 300 °C-700 °C for the RT and 100 °C implanted samples, activation energies (Ea), and pre-exponential factors (Do), were extracted. The values of D ranged from (9.72 ± 0.48) × 10-21 to (1.87 ± 0.09) × 10-20 m2/s with an activation energy of (6.25 ± 0.31) × 10-5 eV for RT implanted samples, and the samples implanted at 100 °C, D ranged from (3.85 ± 0.19) × 10-21 to (6.96 ± 0.34) × 10-20 m2/s with activation energy of (4.10 ± 0.02) × 10-5 eV. The Raman analysis revealed that implantation at the RT amorphised the glassy carbon structure while the samples implanted at 100 °C showed mild damage compared to RT implantation. Annealing of the RT-implanted sample resulted in some recovery of the damaged region as a function of increasing annealing temperature.
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Affiliation(s)
- M Y A Ismail
- Department of Physics, University of Pretoria, Pretoria, 0002, South Africa; Department of Physics, University of Zalingei, Zalingei, 63314, Central Darfur, Sudan.
| | - Z A Y Abdalla
- Department of Physics, University of Pretoria, Pretoria, 0002, South Africa
| | - E G Njoroge
- Department of Physics, University of Pretoria, Pretoria, 0002, South Africa; ENGAGE, University of Pretoria, Pretoria, Pretoria, 0002, South Africa
| | - T T Hlatshwayo
- Department of Physics, University of Pretoria, Pretoria, 0002, South Africa
| | - J B Malherbe
- Department of Physics, University of Pretoria, Pretoria, 0002, South Africa
| | - A J Innocent
- Department of Physics, University of Pretoria, Pretoria, 0002, South Africa
| | - Huzifa M A M Elnour
- Department of Physics, University of Al Fashir, Al Fashir, 61114, North Darfur, Sudan
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Niu X, Wu W, Shi W, Fu Z, Han X, Li SL, Yan Z. Quantifying the contribution of methane diffusion and ebullition from agricultural ditches. Sci Total Environ 2024; 919:170912. [PMID: 38354794 DOI: 10.1016/j.scitotenv.2024.170912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/05/2024] [Accepted: 02/09/2024] [Indexed: 02/16/2024]
Abstract
Agricultural ditches are significant methane (CH4) sources since substantial nutrient inputs stimulate CH4 production and emission. However, few studies have quantified the role of diffusion and ebullition pathways in total CH4 emission from agricultural ditches. This study measured the spatiotemporal variations of diffusive and ebullitive CH4 fluxes from a multi-level ditch system in a typical temperate agriculture area, and assessed their contributions to the total CH4 emission. Results illustrated that the mean annual CH4 flux in the ditch system reached 1475.1 mg m-2 d-1, among which 1376.7 mg m-2 d-1 was emitted via diffusion and 98.5 mg m-2 d-1 via ebullition. Both diffusive and ebullitive fluxes varied significantly across different types of ditches and seasons, with diffusion dominating CH4 emission in middle-size ditches and ebullition dominating in large-size ditches. Diffusion was primarily driven by large nutrient inputs from adjacent farmlands, while hydrological factors like water temperature and depth controlled ebullition. Overall, CH4 emission accounted for 86 % of the global warming potential across the ditch system, with 81 % attributed to diffusion and 5 % to ebullition. This study highlights the importance of agricultural ditches as hotspots for CH4 emissions, particularly the dominant role of the diffusion pathway.
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Affiliation(s)
- Xueqi Niu
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Wenxin Wu
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China.
| | - Weiwei Shi
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Zihuan Fu
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Xingxing Han
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Si-Liang Li
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China; Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim, Tianjin University, Tianjin 300072, China; Tianjin Bohai Rim Coastal Earth Critical Zone National Observation and Research Station, Tianjin University, Tianjin 300072, China
| | - Zhifeng Yan
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China; Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim, Tianjin University, Tianjin 300072, China; Tianjin Bohai Rim Coastal Earth Critical Zone National Observation and Research Station, Tianjin University, Tianjin 300072, China.
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Lai R, Zeng X, Xu Q, Xu Y, Li X, Ru Y, Wang Y, Wang D, Zhou X, Shao Y. Ratiometric G-quadruplex/hemin DNAzymes with low-dosage associative substrates. Anal Chim Acta 2024; 1295:342320. [PMID: 38355221 DOI: 10.1016/j.aca.2024.342320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 01/31/2024] [Indexed: 02/16/2024]
Abstract
BACKGROUND G-quadruplex (G4)/hemin DNAzymes with conversion of substrates into colorimetric readouts are well recognized as convenient biocatalysis tools in sensor development. However, the previously developed colorimetric G4/hemin DNAzymes are diffusive substrate-based DNAzymes (DSBDs). The current colorimetric DSBDs have several drawbacks including high dosage (∼mM) of diffusive substrates (DSs), colorimetric product toxicity, and single colorimetric readout without tolerance to fluctuation of experimental factors and background. In addition, the usage of high-dosage DSs can smear the G4 foldings and their discard is more harmful to environment. Therefore, exploring alternative DNAzymes with potential to overcome these drawbacks of DSBDs is urgently needed. RESULTS We herein developed associative substrate-based DNAzymes (ASBDs). Cyanine dyes were selected as associative substrates (ASs) due to their binding competency with G4/hemin DNAzymes. With respect to DSBDs, ASBDs needed only low dosage (∼10 μM) of ASs to be able to cause a rapid and visible substrate conversion. In addition, since cyanine dyes are NIR dyes with high extinction coefficients and their conversion products have absorption bands at shorter wavelength. Therefore, a colorimetric ratio response can be developed to follow activities of G4/hemin DNAzymes with competency to tolerate fluctuation of experimental factors and background. In particular, herein developed ASBDs can endure somewhat concentration fluctuation of H2O2. ASBDs are able to cowork with other enzymes (for example, glucose oxidase) to realize cascade sensing. SIGNIFICANCE The developed ASBDs can operate at low dosage of substrates with a colorimetric ratio response and can overcome the drawbacks met in DSBDs. We expect that, by designing ASs with fruitful color panel in the future, our work will inspire more interesting in developing environment-benign and low-carbon G4/hemin DNAzymes and desired colorful high-performance sensors.
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Affiliation(s)
- Rong Lai
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Xingli Zeng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Qiuda Xu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Ying Xu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Xueni Li
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Yulu Ru
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Yilin Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Dandan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Xiaoshun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China
| | - Yong Shao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, Zhejiang, PR China.
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Hazarika T, Kakati B, Pal D, Saikia R, Rawal A, Mahanta MK, Biswas S. Role of plasma process gas on permeate flux augmentation of cellulose nitrate membrane for mud water treatment. Sci Rep 2024; 14:6585. [PMID: 38503842 PMCID: PMC10951407 DOI: 10.1038/s41598-024-56948-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 03/13/2024] [Indexed: 03/21/2024] Open
Abstract
A comparative study between Nitrogen (N2) and Argon (Ar) plasma is carried out to investigate its effect on surface morphology, hydrophilicity, permeate flux and ageing of cellulose nitrate polymeric membranes in the present work. Langmuir probe and Optical Emission Spectroscopy are used to characterize the plasma. The SEM analysis reveals the noticeable macro-void creations and pore enlargement for both N2 and Ar plasma. The AFM analysis shows a higher surface roughness for Ar plasma treatment as compared to N2 plasma treatment. XPS analysis confirms the changes in the polymer matrix along with the incorporation of various functional groups on the membrane surface as a result of the plasma treatment. A better hydrophilic nature with prolonged plasma treatment is observed for Ar plasma as compared to N2 plasma treatment. The present results show a higher permeate flux with a high rejection rate for Ar plasma treatment in comparison to N2 plasma, which might be due to the pore size and pore area enlargement of the membrane. The hydrophobic recovery for both the plasma-treated membranes is found significant for the initial ageing period of 7 days and found almost stable in nature after 7 days. A diffusion-based theoretical model is developed to study the hydrophobic recovery of plasma-treated membranes. A strong alignment between experimental and theoretical results is observed in the present work. The Cake Filtration model, derived from the Hermia model, is identified as the most suitable model for describing the fouling mechanisms for the present work.
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Affiliation(s)
- Tonmoi Hazarika
- META Laboratory, Assam Science and Technology University, Jalukbari, Guwahati, Assam, 781013, India
- Department of Physics, Gauhati University, Jalukbari, Guwahati, Assam, 781014, India
- Surface Engineering and Plasma Processing Laboratory, Indian Institute of Petroleum and Energy, Visakhapatnam, Andhra Pradesh, 530003, India
| | - Bharat Kakati
- META Laboratory, Assam Science and Technology University, Jalukbari, Guwahati, Assam, 781013, India.
| | - Dipankar Pal
- Surface Engineering and Plasma Processing Laboratory, Indian Institute of Petroleum and Energy, Visakhapatnam, Andhra Pradesh, 530003, India.
| | - Rimlee Saikia
- META Laboratory, Assam Science and Technology University, Jalukbari, Guwahati, Assam, 781013, India
- Department of Physics, Gauhati University, Jalukbari, Guwahati, Assam, 781014, India
| | - Ankit Rawal
- Surface Engineering and Plasma Processing Laboratory, Indian Institute of Petroleum and Energy, Visakhapatnam, Andhra Pradesh, 530003, India
| | - Manoj Kumar Mahanta
- Pragjyotish College, Pragjyotish Path, Santipur, Guwahati, Assam, 781009, India
| | - Subir Biswas
- Physical Science Division, Institute of Advanced Study in Science and Technology, Vigyan Path, Garchuk, Paschim Boragaon, Guwahati, Assam, 781035, India
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Cao J, Ou T, Sun Y, Wu H, Luo D, Yang C, Zhang L, Zhang D, Zhang X, Qin J, Yang X. High-Rate and Ultra-Stable aqueous Zinc-Ion batteries enabled by Potassium-Infused ammonium vanadate nanosheets. J Colloid Interface Sci 2024; 665:32-40. [PMID: 38513406 DOI: 10.1016/j.jcis.2024.03.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/07/2024] [Accepted: 03/17/2024] [Indexed: 03/23/2024]
Abstract
Aqueous zinc-ion batteries (AZIBs), defined by low expenses, superior safety, and plentiful reserves, demonstrate tremendous development potential in energy storage systems at the grid scale. Whereas the cathode instability and the limited diffusion of Zn2+ have impeded the development of AZIBs. Herein, a high-performance K-NH4V4O10 (K-NVO) cathode with K+ doping synthesized successfully through one-step hydrothermal approach. Experiments and density functional theory (DFT) calculations indicate that K-NVO has Zn2+ diffusion pathways with lower barriers for smoother transport, and lower formation energy. The combination of the rapid Zn2+ diffusion and the stable structure results in outstanding electrochemical performance of K-NVO as demonstrated in tests. K-NVO cathode achieves a specific capacity of 406 mAh g-1 at 0.2 A g-1, maintains satisfactory cyclic stability with 81.6 % capacity retention after 1000 cycles at 5 A g-1, and possesses a high energy density of 350.9 Wh kg-1. Furthermore, confirmation of the zinc storage mechanism in K-NVO was carried out through Ex situ tests, such as XRD and XPS. This research contributes a unique perspective to the formulation of high-performance cathode materials for AZIBs.
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Affiliation(s)
- Jin Cao
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China; Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China.
| | - Tianzhuo Ou
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Yongxin Sun
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Haiyang Wu
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Ding Luo
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Chengwu Yang
- Center of Excellence on Advanced Materials for Energy Storage, Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand; School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
| | - Lulu Zhang
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Dongdong Zhang
- Center of Excellence on Advanced Materials for Energy Storage, Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand; School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
| | - Xinyu Zhang
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Jiaqian Qin
- Center of Excellence on Advanced Materials for Energy Storage, Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand; School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China.
| | - Xuelin Yang
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China.
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Xiao J, Cheng W, Fu-kang Q. Interfacial reaction of Sn-1.5Ag-2.0Zn low-silver lead-free solder with oriented copper. Heliyon 2024; 10:e27010. [PMID: 38455589 PMCID: PMC10918204 DOI: 10.1016/j.heliyon.2024.e27010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 03/09/2024] Open
Abstract
High density packaging technology reduces the pad size and the number of grains contained in the pad. When the polycrystalline pad turns into a single crystal pad, the grain orientation has an important impact on the formation of the intermetallic compound (IMC) at the interface. The growth of IMC at the interface between the solder and the single-crystal copper substrate is investigated by selecting the prospective Sn-1.5Ag-2Zn as the solder alloy. Sn-1.5Ag-2.0Zn lead-free solder joints soldered with single crystal (111) copper substrate and polycrystalline red copper substrate are reflowed at 250 °C for 5 min. Samples are subsequently aged at 160 °C. The uneven scallop like Cu6Sn5 IMC layer grows rapidly when the alloy solder contacts with the copper substrate. The Cu6Sn5 grain size formed on the surface of single crystal copper is larger than that of polycrystalline copper. Single crystal copper has no grain boundary to block atomic diffusion, which affects grain nucleation and growth. The growth rate of Cu6Sn5 formed by alloy solder and the single crystal (111) copper solder joint after aging treatment at 160 °C for 20 h is about twice that of the polycrystalline copper solder joint. Then it grows slowly with the increase of aging treatment time. The thick layer Cu6Sn5 breaks due to crack diffusion after 600 h of aging treatment, and the thickness of IMC remains at 3.5 μm. Cu5Zn8 generated at the solder and polycrystalline copper solder joint during aging treatment acts as a barrier layer, preventing the solder from contacting the copper substrate and inhibiting the formation of Cu6Sn5. Cu5Zn8 is broken and decomposed after 300 h of aging treatment, and Cu6Sn5 grows rapidly after the barrier layer disappeared. The thickness of Cu6Sn5 is about 2.8 μm. The thickness of IMC of solder joint on single crystal copper is 0.7 μm more than that on polycrystalline copper. After aging treatment, the IMC formed at the interface between alloy solder and single crystal copper has better compactness and basically no pores, while there are obvious pores between IMC grains at the interface between alloy solder and polycrystalline copper, which can predict that the soldering quality of the interface between alloy solder and single crystal copper is better. This will provide application prospects for solder joint interface reliability research.
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Affiliation(s)
- Jin Xiao
- School of Mechanical and Electrical Engineering, Guangzhou Huali College, Guangzhou, 511300, China
- School of Advanced Manufacturing, Guangdong Songshan Polytechnic College, Shaoguan, 512126, China
| | - Wei Cheng
- School of Intelligent Equipment Manufacturing, Zhongshan Torch Polytechnic College, Zhongshan, 528436, China
| | - Qu Fu-kang
- School of Mechanical and Electrical Engineering, Guangzhou Huali College, Guangzhou, 511300, China
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Pangeni S, Biswas G, Kaushik V, Kuppa S, Yang O, Lin CT, Mishra G, Levy Y, Antony E, Ha T. Rapid Long-distance Migration of RPA on Single Stranded DNA Occurs Through Intersegmental Transfer Utilizing Multivalent Interactions. J Mol Biol 2024; 436:168491. [PMID: 38360091 PMCID: PMC10949852 DOI: 10.1016/j.jmb.2024.168491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/04/2024] [Accepted: 02/08/2024] [Indexed: 02/17/2024]
Abstract
Replication Protein A (RPA) is asingle strandedDNA(ssDNA)binding protein that coordinates diverse DNA metabolic processes including DNA replication, repair, and recombination. RPA is a heterotrimeric protein with six functional oligosaccharide/oligonucleotide (OB) domains and flexible linkers. Flexibility enables RPA to adopt multiple configurations andis thought to modulate its function. Here, usingsingle moleculeconfocal fluorescencemicroscopy combinedwith optical tweezers and coarse-grained molecular dynamics simulations, we investigated the diffusional migration of single RPA molecules on ssDNA undertension.The diffusioncoefficientDis the highest (20,000nucleotides2/s) at 3pNtension and in 100 mMKCl and markedly decreases whentensionor salt concentrationincreases. We attribute the tension effect to intersegmental transfer which is hindered by DNA stretching and the salt effect to an increase in binding site size and interaction energy of RPA-ssDNA. Our integrative study allowed us to estimate the size and frequency of intersegmental transfer events that occur through transient bridging of distant sites on DNA by multiple binding sites on RPA. Interestingly, deletion of RPA trimeric core still allowed significant ssDNA binding although the reduced contact area made RPA 15-fold more mobile. Finally, we characterized the effect of RPA crowding on RPA migration. These findings reveal how the high affinity RPA-ssDNA interactions are remodeled to yield access, a key step in several DNA metabolic processes.
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Affiliation(s)
- Sushil Pangeni
- TC Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, MD, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Gargi Biswas
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Vikas Kaushik
- Department of Biochemistry and Molecular Biology, St. Louis University School of Medicine, St. Louis, MO, USA
| | - Sahiti Kuppa
- Department of Biochemistry and Molecular Biology, St. Louis University School of Medicine, St. Louis, MO, USA
| | - Olivia Yang
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Chang-Ting Lin
- Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Garima Mishra
- Department of Physics, Ashoka University, Sonepet, Haryana, India
| | - Yaakov Levy
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Edwin Antony
- Department of Biochemistry and Molecular Biology, St. Louis University School of Medicine, St. Louis, MO, USA.
| | - Taekjip Ha
- TC Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, MD, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA; Howard Hughes Medical Institute, Boston, MA, USA.
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9
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Arisekar U, Shakila RJ, Shalini R, Sivaraman B, Karthy A, Al-Ansari MM, Dahmash Al-Dahmash N, Mythili R, Kim W, Ramkumar S, Kalidass B, Sangma SN. Diffusion of organochlorine (OCPs) and cypermethrin pesticides from rohu (Labeo rohita) internal organs to edible tissues during ice storage: a threat to human health. Environ Geochem Health 2024; 46:126. [PMID: 38483641 DOI: 10.1007/s10653-024-01891-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/27/2024] [Indexed: 03/19/2024]
Abstract
The migration of organochlorine pesticides (OCPs) and cypermethrin residues from internal organs to edible tissues of ice-held Labeo rohita (rohu) was investigated in this study. The liver (246 µg/kg) had the highest level of ∑OCP residues, followed by the gills (226 µg/kg), intestine (167 µg/kg), and muscle tissue (54 µg/kg). The predominant OCPs in the liver and gut were endosulfan (53-66 µg/kg), endrin (45-53 µg/kg), and dichloro-diphenyl-trichloroethane (DDT; 26-35 µg/kg). The ∑OCP residues in muscle increased to 152 µg/kg when the entire rohu was stored in ice, but they decreased to 129 µg/kg in gill tissues. On days 5 and 9, the total OCPs in the liver increased to 317 µg/kg and 933 µg/kg, respectively. Beyond day 5 of storage, total internal organ disintegration had led to an abnormal increase in OCP residues of liver-like mass. Despite a threefold increase in overall OCP residues by day 9, accumulation of benzene hexachloride (BHC) and heptachlor was sixfold, endrin and DDT were fourfold, aldrin was threefold, and endosulfan and cypermethrin were both twofold. Endosulfan, DDT, endrin, and heptachlor were similarly lost in the gills at a rate of 40%, while aldrin and BHC were also lost at 60 and 30%, respectively. The accumulation of OCP residues in tissues has been attributed to particular types of fatty acid derivatives. The study concluded that while pesticide diffusion to edible tissues can occur during ice storage, the levels observed were well below the allowable limit for endosulfan, endrin, and DDT.
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Affiliation(s)
- Ulaganathan Arisekar
- Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Tuticorin, Tamil Nadu, 628008, India.
| | - Robinson Jeya Shakila
- Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Tuticorin, Tamil Nadu, 628008, India
| | - Rajendran Shalini
- Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Tuticorin, Tamil Nadu, 628008, India.
| | - Balasubramanian Sivaraman
- Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Tuticorin, Tamil Nadu, 628008, India
| | - Arjunan Karthy
- Department of Fishing Technology and Fisheries Engineering, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Tuticorin, Tamil Nadu, 628008, India
| | - Mysoon M Al-Ansari
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Nora Dahmash Al-Dahmash
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - R Mythili
- Department of Pharmacology, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, 600077, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea
| | - Sugumar Ramkumar
- ICAR-Central Marine Fisheries Research Institute, Mumbai, Maharashtra, 400061, India
| | | | - Shannon N Sangma
- ICAR-Indian Agricultural Research Institute, Hazaribagh, Jharkhand, 825405, India
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10
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Boyd ED, Kaur J, Ding G, Chopp M, Jiang Q. Clinical magnetic resonance imaging evaluation of glymphatic function. NMR Biomed 2024:e5132. [PMID: 38465514 DOI: 10.1002/nbm.5132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 03/12/2024]
Abstract
The glymphatic system is a system of specialized perivascular spaces in the brain that facilitates removal of toxic waste solutes from the brain. Evaluation of glymphatic system function by means of magnetic resonance imaging (MRI) has thus far been largely focused on rodents because of the limitations of intrathecal delivery of gadolinium-based contrast agents to humans. This review discusses MRI methods that can be employed clinically for glymphatic-related measurements intended for early diagnosis, prevention, and the treatment of various neurological conditions. Although glymphatic system-based MRI research is in its early stages, recent studies have identified promising noninvasive MRI markers associated with glymphatic system alterations in neurological diseases. However, further optimization in data acquisition, validation, and modeling are needed to investigate the glymphatic system within the clinical setting.
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Affiliation(s)
- Edward D Boyd
- Department of Neurology, Henry Ford Health System, Detroit, Michigan, USA
- Department of Radiology, Michigan State University, East Lansing, Michigan, USA
| | - Jasleen Kaur
- Department of Neurology, Henry Ford Health System, Detroit, Michigan, USA
- Department of Physics, Oakland University, Rochester, Michigan, USA
| | - Guangliang Ding
- Department of Neurology, Henry Ford Health System, Detroit, Michigan, USA
- Department of Radiology, Michigan State University, East Lansing, Michigan, USA
| | - Michael Chopp
- Department of Neurology, Henry Ford Health System, Detroit, Michigan, USA
- Department of Physics, Oakland University, Rochester, Michigan, USA
| | - Quan Jiang
- Department of Neurology, Henry Ford Health System, Detroit, Michigan, USA
- Department of Radiology, Michigan State University, East Lansing, Michigan, USA
- Department of Physics, Oakland University, Rochester, Michigan, USA
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11
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Clark CJ, Ferguson G, Subedi S, Lad A, Hadd AR, Shrestha B, Shervinskie A, Tomar S, Baker H. Social norms, diffusion, and women's risk of intimate partner violence in Nepal: Impact assessment of a social and behavior Change communication intervention (Change Starts at home). SSM Popul Health 2024; 25:101583. [PMID: 38222673 PMCID: PMC10787293 DOI: 10.1016/j.ssmph.2023.101583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/17/2023] [Accepted: 12/09/2023] [Indexed: 01/16/2024] Open
Abstract
Introduction Intimate partner violence (IPV) is a significant public health, human rights, and development issue. While existing evidence posits that addressing social norms is key to IPV prevention, successful IPV interventions that include a norms approach are limited in number and methodological rigor and rarely include a formal investigation of the diffusion of intervention impact. We contribute novel findings to this intellectual and programmatic space with evidence on a social and behavior change communication (SBCC) intervention (Change Starts at Home) in Nepal designed to prevent IPV and shift social norms towards greater gender equity. Methods Participants included 442 married women across 13 communities assessed at three timepoints: before intervention (baseline), at the completion of the core couple's curriculum and edutainment (midline), and at the conclusion of the diffusion curriculum (endline). Generalized estimating equations with propensity-score adjustments were used to determine change in outcomes at midline and endline for two intervention conditions (direct beneficiary, N = 173; and resident of the intervention community, (N = 178) relative to control (N = 91). Results IPV victimization significantly decreased in both intervention conditions at midline, with larger reductions in direct beneficiaries. At endline, direct beneficiaries had sustained reduction in IPV relative to control participants. Positive injunctive norms also significantly improved by midline for both intervention groups, whereas improvements in descriptive norms for intervention groups were matched by improvements in the control group at both midline and endline. Several secondary outcomes showed significant improvements for both intervention groups at midline and/or endline, including in-law violence, financial decision-making, communication, and relationship quality, with additional improvements for the direct beneficiaries in attitudes, leadership, GBV advocacy, and diffusion. Conclusion This study sheds light on the effectiveness of the Change intervention, the role of addressing social norms in IPV prevention efforts, and the benefits of organized diffusion.
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Affiliation(s)
- Cari Jo Clark
- Rollins School of Public Health, Emory University, 1518 Clifton Road NE, R Randall Rollins Building 628, Atlanta, GA, USA
| | | | | | - Arti Lad
- Equal Access International, Washington DC, USA
| | | | - Binita Shrestha
- Country Representative, Equal Access International, Kathmandu, Nepal
| | | | - Shweta Tomar
- Center on Gender Equity and Health, University of California San Diego, CA, USA
| | - Holly Baker
- Center on Gender Equity and Health, School of Public Health, University of California, San Diego, USA
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El Homsi M, Bane O, Fauveau V, Hectors S, Vietti Violi N, Sylla P, Ko HB, Cuevas J, Carbonell G, Nehlsen A, Vanguri R, Viswanath S, Jambawalikar S, Shaish H, Taouli B. Prediction of locally advanced rectal cancer response to neoadjuvant chemoradiation therapy using volumetric multiparametric MRI-based radiomics. Abdom Radiol (NY) 2024; 49:791-800. [PMID: 38150143 DOI: 10.1007/s00261-023-04128-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 11/06/2023] [Accepted: 11/12/2023] [Indexed: 12/28/2023]
Abstract
PURPOSE To assess the role of pretreatment multiparametric (mp)MRI-based radiomic features in predicting pathologic complete response (pCR) of locally advanced rectal cancer (LARC) to neoadjuvant chemoradiation therapy (nCRT). METHODS This was a retrospective dual-center study including 98 patients (M/F 77/21, mean age 60 years) with LARC who underwent pretreatment mpMRI followed by nCRT and total mesorectal excision or watch and wait. Fifty-eight patients from institution 1 constituted the training set and 40 from institution 2 the validation set. Manual segmentation using volumes of interest was performed on T1WI pre-/post-contrast, T2WI and diffusion-weighted imaging (DWI) sequences. Demographic information and serum carcinoembryonic antigen (CEA) levels were collected. Shape, 1st and 2nd order radiomic features were extracted and entered in models based on principal component analysis used to predict pCR. The best model was obtained using a k-fold cross-validation method on the training set, and AUC, sensitivity and specificity for prediction of pCR were calculated on the validation set. RESULTS Stage distribution was T3 (n = 79) or T4 (n = 19). Overall, 16 (16.3%) patients achieved pCR. Demographics, MRI TNM stage, and CEA were not predictive of pCR (p range 0.59-0.96), while several radiomic models achieved high diagnostic performance for prediction of pCR (in the validation set), with AUCs ranging from 0.7 to 0.9, with the best model based on high b-value DWI demonstrating AUC of 0.9 [95% confidence intervals: 0.67, 1], sensitivity of 100% [100%, 100%], and specificity of 81% [66%, 96%]. CONCLUSION Radiomic models obtained from pre-treatment MRI show good to excellent performance for the prediction of pCR in patients with LARC, superior to clinical parameters and CEA. A larger study is needed for confirmation of these results.
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Affiliation(s)
- Maria El Homsi
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, USA.
- Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York av, New York, USA.
| | - Octavia Bane
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Valentin Fauveau
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Stefanie Hectors
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Naik Vietti Violi
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Radiology, Lausanne University Hospital, Lausanne, Switzerland
| | - Patricia Sylla
- Department of Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Huai-Bin Ko
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pathology, Columbia University Medical Center, New York, NY, USA
| | - Jordan Cuevas
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Guillermo Carbonell
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Radiology, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, Murcia, Spain
| | - Anthony Nehlsen
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Rami Vanguri
- Department of Epidemiology & Biostatistics, Columbia University Medical Center, New York, NY, USA
| | - Satish Viswanath
- Department of Radiology, Case Western University, Cleveland, OH, USA
| | - Sachin Jambawalikar
- Department of Radiology, Columbia University Medical Center, New York, NY, USA
| | - Hiram Shaish
- Department of Radiology, Columbia University Medical Center, New York, NY, USA
| | - Bachir Taouli
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, USA
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Condict L, Elliott S, Hung A, Ashton J, Kasapis S. Interfacing β-casein - Phenolic compound interactions via molecular dynamics simulations with diffusion kinetics in delivery vehicles. Food Chem 2024; 435:137595. [PMID: 37778255 DOI: 10.1016/j.foodchem.2023.137595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 09/13/2023] [Accepted: 09/23/2023] [Indexed: 10/03/2023]
Abstract
The effect that protein-bioactive interactions may have on diffusion kinetics in foods and nutraceuticals was investigated by examining the diffusion kinetics of phenolic compounds (ferulic acid and epicatechin) of varying size, in the presence and absence of bovine β-casein. In the presence of the protein, the diffusion rate for ferulic acid and epicatechin was shown to decrease from 2.76 × 10-11 and 1.33 × 10-11 to 8.51 × 10-12 and 1.00 × 10-12 m2/s, respectively. The magnitude of the decrease in diffusion rate appears to be governed by interaction strength, with pulling simulations and umbrella sampling determining binding energies of -4.6 and -6.7 kcal mol-1 for protein-ferulic acid and protein-epicatechin interactions. This outcome indicates that dissociation of the bioactive from the delivery matrix may be the rate limiting process for diffusion in low solid systems. This work offers valuable insights for the use of pulling/umbrella simulations in understanding the impact of interactions on diffusion in foods and nutraceuticals.
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Affiliation(s)
- Lloyd Condict
- School of Science, RMIT University, Bundoora West Campus, Plenty Road, Melbourne, VIC 3083, Australia
| | - Shakira Elliott
- School of Science, RMIT University, Bundoora West Campus, Plenty Road, Melbourne, VIC 3083, Australia
| | - Andrew Hung
- School of Science, RMIT University, Bundoora West Campus, Plenty Road, Melbourne, VIC 3083, Australia
| | - John Ashton
- Sanitarium Development and Innovation, Sanitarium Health and Wellbeing Company, Cooranbong, NSW 2265, Australia
| | - Stefan Kasapis
- School of Science, RMIT University, Bundoora West Campus, Plenty Road, Melbourne, VIC 3083, Australia.
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14
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Jäntti J, Joenathan A, Fugazzola M, Tuppurainen J, Honkanen JTJ, Töyräs J, van Weeren R, Snyder BD, Grinstaff MW, Matikka H, Mäkelä JTA. Cationic tantalum oxide nanoparticle contrast agent for micro computed tomography reveals articular cartilage proteoglycan distribution and collagen architecture alterations. Osteoarthritis Cartilage 2024; 32:299-309. [PMID: 38061579 DOI: 10.1016/j.joca.2023.11.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/17/2023]
Abstract
OBJECTIVE Cationic tantalum oxide nanoparticles (Ta2O5-cNPs), as a newly introduced contrast agent for computed tomography of cartilage, offer quantitative evaluation of proteoglycan (PG) content and biomechanical properties. However, knowledge on the depth-wise impact of cartilage constituents on nanoparticle diffusion, particularly the influence of the collagen network, is lacking. In this study, we aim to establish the depth-dependent relationship between Ta2O5-cNP diffusion and cartilage constituents (PG content, collagen content and network architecture). METHODS Osteochondral samples (n = 30) were harvested from healthy equine stifle joints (N = 15) and the diffusion of 2.55 nm diameter cationic Ta2O5-cNPs into the cartilage was followed with micro computed tomography (µCT) imaging for up to 96 hours. The diffusion-related parameters, Ta2O5-cNP maximum partition (Pmax) and diffusion time constant, were compared against biomechanical and depth-wise structural properties. Biomechanics were assessed using stress-relaxation and sinusoidal loading protocols, whereas PG content, collagen content and collagen network architecture were determined using digital densitometry, Fourier-transform infrared spectroscopy and polarized light microscopy, respectively. RESULTS The Pmax correlates with the depth-wise distribution of PGs (bulk Spearman's ρ = 0.87, p < 0.001). More open collagen network architecture at the superficial zone enhances intake of Ta2O5-cNPs, but collagen content overall decreases the intake. The Pmax values correlate with the equilibrium modulus (ρ = 0.80, p < 0.001) of articular cartilage. CONCLUSION This study establishes the feasibility of Ta2O5-cNPs for the precise and comprehensive identification of biomechanical and structural changes in articular cartilage via contrast-enhanced µCT.
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Affiliation(s)
- Jiri Jäntti
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
| | - Anisha Joenathan
- Division of Materials Science, Boston University, Boston, MA, USA
| | - Maria Fugazzola
- Department of Clinical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Juuso Tuppurainen
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | | | - Juha Töyräs
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland; School of Electrical Engineering and Computer Science, The University of Queensland, Brisbane, Australia; Science Service Center, Kuopio University Hospital, Kuopio, Finland
| | - René van Weeren
- Department of Clinical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Brian D Snyder
- Department of Orthopedic Surgery, Boston Children's Hospital, Boston, MA, USA
| | - Mark W Grinstaff
- Division of Materials Science, Boston University, Boston, MA, USA; Departments of Biomedical Engineering and Chemistry, Boston University, Boston, MA, USA
| | - Hanna Matikka
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland
| | - Janne T A Mäkelä
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
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15
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Mii Y. Understanding and manipulating extracellular behaviors of Wnt ligands. In Vitro Cell Dev Biol Anim 2024:10.1007/s11626-024-00856-9. [PMID: 38379096 DOI: 10.1007/s11626-024-00856-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 01/17/2024] [Indexed: 02/22/2024]
Abstract
Wnt, a family of secreted signaling proteins, serves diverse functions in embryogenesis, organogenesis, cancer, and stem cell functions. In the context of development, Wnt has been considered a representative morphogen, forming concentration gradients to give positional information to cells or tissues. However, although gradients are often illustrated in schemata, the reality of concentration gradients, or in other words, actual spatial distribution of Wnt ligands, and their behaviors in the extracellular space still remain poorly known. To understand extracellular behavior of Wnt ligands, quantitative analyses such as fluorescence correlation spectroscopy (FCS) and fluorescence recovery after photobleaching (FRAP) are highly informative because Wnt dispersal involves physical and biochemical processes, such as diffusion and binding to or dissociation from cell surface molecules, including heparan sulfate proteoglycans (HSPGs). Here, I briefly discuss representative methods to quantify morphogen dynamics. In addition, I discuss molecular manipulations of morphogens, mainly focusing on use of protein binders, and synthetic biology of morphogens as indicators of current and future directions in this field.
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Affiliation(s)
- Yusuke Mii
- National Institute for Basic Biology (NIBB) and Exploratory Research Center On Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
- The Graduate University for Advanced Studies (SOKENDAI), Okazaki, Aichi, 444-8787, Japan.
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Zhao S, Li Y, Ning N, Liang H, Wu Y, Wu Q, Wang Z, Tian J, Yang J, Gao X, Liu A, Song Q, Zhang L. Association of peritumoral region features assessed on breast MRI and prognosis of breast cancer: a systematic review and meta-analysis. Eur Radiol 2024:10.1007/s00330-024-10612-y. [PMID: 38334760 DOI: 10.1007/s00330-024-10612-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 12/03/2023] [Accepted: 01/01/2024] [Indexed: 02/10/2024]
Abstract
BACKGROUND Increasing attention has been given to the peritumoral region. However, conflicting findings have been reported regarding the relationship between peritumoral region features on MRI and the prognosis of breast cancer. PURPOSE To evaluate the relationship between peritumoral region features on MRI and prognosis of breast cancer. MATERIALS AND METHODS A retrospective meta-analysis of observational studies comparing either qualitative or quantitative assessments of peritumoral MRI features on breast cancer with poor prognosis and control subjects was performed for studies published till October 2022. Pooled odds ratios (ORs) or standardized mean differences and 95% confidence intervals (CIs) were estimated by using random-effects models. The heterogeneity across the studies was measured using the statistic I2. Sensitivity analyses were conducted to test this association according to different study characteristics. RESULTS Twenty-four studies comprising 1853 breast cancers of poor prognosis and 2590 control participants were included in the analysis. Peritumoral edema was associated with non-luminal breast cancers (OR=3.56; 95%CI: 2.17, 5.83; p=.000), high expression of the Ki-67 index (OR=3.70; 95%CI: 2.41, 5.70; p =.000), high histological grade (OR=5.85; 95%CI: 3.89, 8.80; p=.000), lymph node metastasis (OR=2.83; 95%CI: 1.71, 4.67; p=.000), negative expression of HR (OR=3.15; 95%CI: 2.03, 4.88; p=.000), and lymphovascular invasion (OR=1.72; 95%CI: 1.28, 2.30; p=.000). The adjacent vessel sign was associated with greater odds of breast cancer with poor prognosis (OR=2.02; 95%CI: 1.68, 2.44; p=.000). Additionally, breast cancers with poor prognosis had higher peritumor-tumor ADC ratio (SMD=0.67; 95%CI: 0.54, 0.79; p=.000) and peritumoral ADCmean (SMD=0.29; 95%CI: 0.15, 0.42; p=.000). A peritumoral region of 2-20 mm away from the margin of the tumor is recommended. CONCLUSION The presence of peritumoral edema and adjacent vessel signs, higher peritumor-tumor ADC ratio, and peritumoral ADCmean were significantly correlated with poor prognosis of breast cancer. CLINICAL RELEVANCE STATEMENT MRI features of the peritumoral region can be used as a non-invasive index for the prognostic evaluation of invasive breast cancer. KEY POINTS • Peritumoral edema was positively associated with non-luminal breast cancer, high expression of the Ki-67 index, high histological grade, lymph node metastasis, negative expression of HR, and lymphovascular invasion. • The adjacent vessel sign was associated with greater odds of breast cancers with poor prognosis. • Breast cancers with poor prognosis had higher peritumor-tumor ADC ratio and peritumoral ADCmean.
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Affiliation(s)
- Siqi Zhao
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Yuanfei Li
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Ning Ning
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Hongbing Liang
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Yueqi Wu
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Qi Wu
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Zhuo Wang
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Jiahe Tian
- Zhongshan College of Dalian Medical University, No28 Aixian Road, Gaoxin District, Dalian, Liaoning, 116085, People's Republic of China
| | - Jie Yang
- School of Public Health, Dalian Medical University, Dalian, Liaoning Province, No. 9W. Lvshun South Road, Dalian, 116044, People's Republic of China
| | - Xue Gao
- Department of Pathology, First Affiliated Hospital of Dalian Medical University, 222 Zhongshan Road, Dalian, Liaoning, 116011, People's Republic of China
| | - Ailian Liu
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Qingwei Song
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China
| | - Lina Zhang
- Department of Radiology, First Affiliated Hospital of Dalian Medical University, No 222 Zhongshan Road, Xigang District, Dalian, Liaoning, 116011, People's Republic of China.
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Serša I. Comparison of driven equilibrium and standard spin-echo sequence in MR microscopy: Analysis of signal dependence on RF pulse imperfection and diffusion. J Magn Reson 2024; 359:107624. [PMID: 38241847 DOI: 10.1016/j.jmr.2024.107624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/03/2024] [Accepted: 01/12/2024] [Indexed: 01/21/2024]
Abstract
Rapid MR imaging of slowly relaxing samples is often challenging. The most commonly used solutions are found in multi spin-echo (RARE) sequences or gradient-echo (GE) sequences, which allow faster imaging of such samples with multiple acquisitions of k-space lines per excitation or imaging with very short repetition times (TRs). Another solution is the use of a spin-echo (SE) sequence superimposed with a driven equilibrium Fourier transform (DEFT) method. Such a (DE-SE) imaging sequence has two refocusing RF pulses that produce two spin-echoes. In the first echo, the signal is acquired from the k-space line, and in the second echo, a 90° RF pulse is applied, typically 180° out of phase with respect to the excitation RF pulse. This last RF pulse allows almost complete magnetization reversal back to the longitudinal orientation with minimal magnetization loss. The DE-SE sequence and its RARE variant are widely used in clinical imaging, but its use in MR microscopy has some peculiarities related to the usually less perfect RF pulse flip angles and diffusion. In this study, their effects are first theoretically analyzed and later verified by experiments on test samples performed on a 9.4 T system for MR microscopy. Experiments on a water-filled tube for TE = 3.4 ms and TR = 25-200 ms showed that the DE-SE sequence produces about 10 times more signal than the SE sequence in this TR range. Finally, the performance of the DE-SE sequence compared to the SE sequence was demonstrated on a biological sample. The presented DE-SE sequence has been shown to be effective for rapid imaging of samples with long T1 relaxation times in MR microscopy and can also be considered as a suitable method for rapid proton density weighed imaging of materials.
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Affiliation(s)
- Igor Serša
- Jožef Stefan Institute, Ljubljana, Slovenia; Institute of Anatomy, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.
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18
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Zhou L, Qu Y, Quan G, Zuo H, Liu M. Nomogram for Predicting Microvascular Invasion in Hepatocellular Carcinoma Using Gadoxetic Acid-Enhanced MRI and Intravoxel Incoherent Motion Imaging. Acad Radiol 2024; 31:457-466. [PMID: 37491178 DOI: 10.1016/j.acra.2023.06.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/19/2023] [Accepted: 06/26/2023] [Indexed: 07/27/2023]
Abstract
RATIONALE AND OBJECTIVES Microvascular invasion (MVI) is an important risk factor in hepatocellular carcinoma (HCC), but it can only be determined through histopathological results. The aim of this study was to develop and validate a nomogram for preoperative prediction MVI in HCC using gadoxetic acid-enhanced magnetic resonance imaging (MRI) and intravoxel incoherent motion imaging (IVIM). MATERIALS AND METHODS From July 2017 to September 2022, 148 patients with surgically resected HCC who underwent preoperative gadoxetic acid-enhanced MRI and IVIM were included in this retrospective study. Clinical indicators, imaging features, and diffusion parameters were compared between the MVI-positive and MVI-negative groups using the chi-square test, Mann-Whitney U test, and independent sample t test. Receiver operating characteristic (ROC) curve was used to evaluate the diagnostic performance in predicting MVI. Univariate and multivariate analyses were conducted to identify the significant clinical-radiological variables associated with MVI. Subsequently, a predictive nomogram that integrates clinical-radiological risk factors and diffusion parameters was developed and validated. RESULTS Serum alpha-fetoprotein level, tumor size, nonsmooth tumor margin, peritumoral hypo-intensity on hepatobiliary phase (HBP), apparent diffusion coefficient value and D value were statistically significant different between MVI-positive group and MVI-negative group. The results of multivariate analysis identified tumor size (odds ratio [OR], 0.786; 95% confidence interval [CI], 0.675-0.915; P < .01), nonsmooth tumor margin (OR, 2.299; 95% CI, 1.005-5.257; P < .05), peritumoral hypo-intensity on HBP (OR, 2.786; 95% CI, 1.141-6.802; P < .05) and D (OR, 0.293; 95% CI,0.089-0.964; P < .05) was the independent risk factor for the status of MVI. In ROC analysis, the combination of peritumoral hypo-intensity on HBP and D demonstrated the highest area under the curve value (0.902) in prediction MVI status, with sensitivity 92.8% and specificity 87.7%. The nomogram exhibited excellent predictive performance with C-index of 0.936 (95% CI 0.895-0.976) in the patient cohort, and had well-fitted calibration curve. CONCLUSION The nomogram incorporating clinical-radiological risk factors and diffusion parameters achieved satisfactory preoperative prediction of the individualized risk of MVI in patients with HCC.
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Affiliation(s)
- Lisui Zhou
- Department of Radiology, Chengdu Xinhua Hospital Affiliated to North Sichuan Medical College, Chengdu, China (L.Z., H.Z., M.L.)
| | - Yuan Qu
- Department of Radiology, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China (Y.Q.)
| | - Guangnan Quan
- MR Research China, GE Healthcare China, Beijing, China (G.Q.)
| | - Houdong Zuo
- Department of Radiology, Chengdu Xinhua Hospital Affiliated to North Sichuan Medical College, Chengdu, China (L.Z., H.Z., M.L.)
| | - Mi Liu
- Department of Radiology, Chengdu Xinhua Hospital Affiliated to North Sichuan Medical College, Chengdu, China (L.Z., H.Z., M.L.).
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Athilingam T, Nelanuthala AVS, Breen C, Karedla N, Fritzsche M, Wohland T, Saunders TE. Long-range formation of the Bicoid gradient requires multiple dynamic modes that spatially vary across the embryo. Development 2024; 151:dev202128. [PMID: 38345326 PMCID: PMC10911119 DOI: 10.1242/dev.202128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 01/03/2024] [Indexed: 02/15/2024]
Abstract
Morphogen gradients provide essential positional information to gene networks through their spatially heterogeneous distribution, yet how they form is still hotly contested, with multiple models proposed for different systems. Here, we focus on the transcription factor Bicoid (Bcd), a morphogen that forms an exponential gradient across the anterior-posterior (AP) axis of the early Drosophila embryo. Using fluorescence correlation spectroscopy we find there are spatial differences in Bcd diffusivity along the AP axis, with Bcd diffusing more rapidly in the posterior. We establish that such spatially varying differences in Bcd dynamics are sufficient to explain how Bcd can have a steep exponential gradient in the anterior half of the embryo and yet still have an observable fraction of Bcd near the posterior pole. In the nucleus, we demonstrate that Bcd dynamics are impacted by binding to DNA. Addition of the Bcd homeodomain to eGFP::NLS qualitatively replicates the Bcd concentration profile, suggesting this domain regulates Bcd dynamics. Our results reveal how a long-range gradient can form while retaining a steep profile through much of its range.
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Affiliation(s)
- Thamarailingam Athilingam
- Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK
- Mechanobiology Institute, National University of Singapore, Singapore117411
| | - Ashwin V. S. Nelanuthala
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, Singapore117558
| | | | - Narain Karedla
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7LF, UK
| | - Marco Fritzsche
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7LF, UK
| | - Thorsten Wohland
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, Singapore117558
- Department of Chemistry, National University of Singapore, Singapore117558
| | - Timothy E. Saunders
- Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK
- Mechanobiology Institute, National University of Singapore, Singapore117411
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, Singapore117558
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20
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Lench DH, Turner TH, Wetmore E, Rodriguez-Porcel FJ, Revuelta GJ. Integrity of the nucleus basalis of meynert and self-reported cognitive dysfunction during wearing-off periods in parkinson's disease. Brain Imaging Behav 2024; 18:256-261. [PMID: 37889445 PMCID: PMC10872236 DOI: 10.1007/s11682-023-00817-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/22/2023] [Indexed: 10/28/2023]
Abstract
BACKGROUND Cognition in Parkinson's Disease can be impacted by the wearing-off phenomenon which results from changes in dopaminergic tone throughout the day. Given the well-established role of the cholinergic basal forebrain in cognition, we hypothesized that the Nucleus Basalis of Meynert may support cognitive processes during wearing-off periods. Specifically, we evaluated whether worsening of cognitive symptoms during wearing-off is more likely to occur with structural degeneration of the Nucleus Basalis of Meynert. METHODS Cognitive wearing-off was evaluated via the Movement Disorders Society Non-Motor Fluctuation Assessment Questionnaire in 33 Parkinson's Disease participants undergoing evaluation for deep brain stimulation. Pre-operative diffusion MRIs were used to measure brain diffusion metrics of the Nucleus Basalis of Meynert and control regions (caudate and putamen). RESULTS The number of cognitive symptoms which worsened during OFF periods positively correlated with mean diffusivity (ρ = 0.561, p = 0.0007) and generalized fractional anisotropy (ρ=-0.447, p = 0.009) within the Nucleus Basalis of Meynert but not in the caudate or putamen. Meanwhile, stable cognitive symptoms, and ON-state cognitive performance as measured by the DRS-2 did not correlate with Nucleus Basalis of Meynert metrics. Correlations were corrected for age, sex, scanner type, disease duration, education and LEDD. CONCLUSIONS Our study suggests that reduced structural integrity of the Nucleus Basalis of Meynert is associated with worsening of participant-reported cognitive deficits during OFF periods, but not overall cognitive functioning in the ON-state. These findings support the hypothesis that structural integrity of the cholinergic Nucleus Basalis of Meynert may provide resilience to cognitive worsening during dopamine-related wearing-off.
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Affiliation(s)
- Daniel H Lench
- Department of Neurology, Medical University of South Carolina, 208-B Rutledge Ave, Charleston, SC, 29403, USA.
| | - Travis H Turner
- Department of Neurology, Medical University of South Carolina, 208-B Rutledge Ave, Charleston, SC, 29403, USA
| | - Emma Wetmore
- Department of Neurology, Medical University of South Carolina, 208-B Rutledge Ave, Charleston, SC, 29403, USA
| | - Federico J Rodriguez-Porcel
- Department of Neurology, Medical University of South Carolina, 208-B Rutledge Ave, Charleston, SC, 29403, USA
| | - Gonzalo J Revuelta
- Department of Neurology, Medical University of South Carolina, 208-B Rutledge Ave, Charleston, SC, 29403, USA
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21
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Zhong G, Chen L, Lin Z, Xiang Z. Evaluation of renal function in chronic kidney disease using histogram analysis based on multiple diffusion models. Br J Radiol 2024:tqae024. [PMID: 38291900 DOI: 10.1093/bjr/tqae024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/22/2023] [Accepted: 01/24/2024] [Indexed: 02/01/2024] Open
Abstract
OBJECTIVES To compare the diagnostic value of histogram features of multiple diffusion metrics in predicting early renal impairment in chronic kidney disease (CKD). METHODS 77 patients with CKD (mild group, eGFR ≥ 60 ml/min/1.73m2) and 30 healthy controls (HCs)were enrolled. Diffusion weighted imaging was performed by using SS-EPI sequence with 13 b values (0, 20, 50, 80, 100, 150, 200, 500, 800, 1000, 1500, 2000 and 2500 sec/mm2). Diffusion models including mono-exponential (Mono), intravoxel incoherent motion (IVIM), stretched-exponential (SEM) and kurtosis (DKI) were calculated, and their histogram features were analyzed. All diffusion models for predicting early renal impairment in CKD were established using logistic regression analysis, and diagnostic efficiency were compared among the models. RESULTS All diffusion models had high differential diagnosis efficiency between mild-group and HCs. The areas under the curve (AUCs) of Mono, IVIM, SEM, DKI and the combined diffusion model for predicting early renal impairment in CKD were 0.829, 0.809, 0.760, 0.825, and 0.861 respectively. There were no significant differences in AUCs except SEM and combined model, SEM and DKI model. There were significant correlations between eGFR/SCr and some of histogram features. CONCLUSIONS Histogram analysis based on multiple diffusion metrics was practicable for the noninvasive assessment of early renal impairment in CKD. ADVANCES IN KNOWLEDGE Advanced diffusion models provided microstructural information. Histogram analysis further reflected histological characteristics and heterogeneity. Histogram analysis based on multiple diffusion models could provide an accurate and non-invasive method to evaluate the early renal damage of CKD.
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Affiliation(s)
- Guimian Zhong
- The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Department of Radiology, Guangzhou Panyu Central Hospital, Guangzhou, 511400, China
| | - Luyan Chen
- Department of Radiology, Guangzhou Panyu Central Hospital, Guangzhou, 511400, China
| | | | - Zhiming Xiang
- Jinan University, Guangzhou, 510632, China
- Department of Radiology, Guangzhou Panyu Central Hospital, Guangzhou, 511400, China
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22
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Ghosh A, Li H, Towbin AJ, Turpin BK, Trout AT. Histogram Analysis of Apparent Diffusion Coefficient Maps Provides Genotypic and Pretreatment Phenotypic Information in Pediatric and Young Adult Rhabdomyosarcoma. Acad Radiol 2024:S1076-6332(24)00011-4. [PMID: 38296742 DOI: 10.1016/j.acra.2024.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 01/02/2024] [Accepted: 01/05/2024] [Indexed: 02/02/2024]
Abstract
INTRODUCTION We evaluate the role of apparent diffusion coefficient (ADC) histogram metrics in stratifying pediatric and young adult rhabdomyosarcomas. METHODS We retrospectively evaluated baseline diffusion-weighted imaging (DWI) from 38 patients with rhabdomyosarcomas (Not otherwise specified: 2; Embryonal: 21; Spindle Cell: 2; Alveolar: 13, mean ± std dev age: 8.1 ± 7.76 years). The diffusion images were obtained on a wide range of 1.5 T and 3 T scanners at multiple sites. FOXO1 fusion status was available for 35 patients, nine of whom harbored the fusion. 13 patients were TNM stage 1, eight had stage 2 disease, nine were stage 3, and eight had stage 4 disease. 23 patients belonged to Clinical Group III and seven to Group IV, while two and five were CG I and II, respectively. Nine patients were classified as low risk, while 21 and five were classified as intermediate and high risk respectively. Histogram parameters of the apparent diffusion coefficient (ADC) map from the entire tumor were obtained based on manual tumor contouring. A two-tailed Mann-Whitney U test was used for all two-group, and the Kruskal-Wallis's test was used for multiple-group comparisons. Bootstrapped receiver operating characteristic (ROC) curves and areas under the curve (AUC) were generated for the statistically significant histogram parameters to differentiate genotypic and phenotypic parameters. RESULTS Alveolar rhabdomyosarcomas had a statistically significant lower 10th Percentile (586.54 ± 164.52, mean ± std dev, values are in ×10-6mm2/s) than embryonal rhabdomyosarcomas (966.51 ± 481.33) with an AUC of 0.85 (95%CI. 0.73-0.95) for differentiating the two. The 10th percentile was also significantly different between FOXO1 fusion-positive (553.87 ± 187.64) and negative (898.07 ± 449.38) rhabdomyosarcomas with an AUC of 0.83 (95% CI 0.71-0.94). Alveolar rhabdomyosarcomas also had statistically significant lower Mean, Median, and Root Mean Squared ADC histogram values than embryonal rhabdomyosarcomas. Four, five, and seven of the 18 histogram parameters evaluated demonstrated a statistically significant increase with higher TNM stage, clinical group, assignment, and pretreatment risk stratification, respectively. For example, Entropy had an AUC of 0.8 (95% CI. 0.67-0.92) for differentiating TNM stage 1 from ≥ stage 2 and 0.9 (95% CI. 0.8-0.98) for differentiating low from intermediate or high-risk stratification. CONCLUSION Our findings demonstrate the potential of ADC histogram metrics to predict clinically relevant variables for rhabdomyosarcoma, including FOXO1 fusion status, histopathology, Clinical Group, TNM staging, and risk stratification.
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Affiliation(s)
- Adarsh Ghosh
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
| | - Hailong Li
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA; Imaging Research Center, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Alexander J Towbin
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Brian K Turpin
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA; Division of Oncology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Andrew T Trout
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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23
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González RM, Maris JJE, Wagner M, Ganjkhanlou Y, Bomer JG, Werny MJ, Rabouw FT, Weckhuysen BM, Odijk M, Meirer F. Fluorescent-Probe Characterization for Pore-Space Mapping with Single-Particle Tracking. Angew Chem Int Ed Engl 2024; 63:e202314528. [PMID: 38037863 DOI: 10.1002/anie.202314528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/02/2023]
Abstract
Porous solids often contain complex pore networks with pores of various sizes. Tracking individual fluorescent probes as they diffuse through porous materials can be used to characterize pore networks at tens of nanometers resolution. However, understanding the motion behavior of fluorescent probes in confinement is crucial to reliably derive pore network properties. Here, we introduce well-defined lithography-made model pores developed to study probe behavior in confinement. We investigated the influence of probe-host interactions on diffusion and trapping of confined single-emitter quantum-dot probes. Using the pH-responsiveness of the probes, we were able to largely suppress trapping at the pore walls. This enabled us to define experimental conditions for mapping of the accessible pore space of a one-dimensional pore array as well as a real-life polymerization-catalyst-support particle.
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Affiliation(s)
- Rafael Mayorga González
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
| | - J J Erik Maris
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
| | - Marita Wagner
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
| | - Yadolah Ganjkhanlou
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
| | - Johan G Bomer
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, 7522, ME Enschede, The Netherlands
| | - Maximilian J Werny
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
| | - Freddy T Rabouw
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
| | - Mathieu Odijk
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, 7522, ME Enschede, The Netherlands
| | - Florian Meirer
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584, CG Utrecht, The Netherlands
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24
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Thijsen A, Masser B, Davison TE, Williamson A. Researchers' views on and practices of knowledge translation: an international survey of transfusion medicine researchers. Implement Sci Commun 2024; 5:9. [PMID: 38217052 PMCID: PMC10787432 DOI: 10.1186/s43058-024-00546-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/07/2024] [Indexed: 01/14/2024] Open
Abstract
BACKGROUND Health research is often driven by the desire to improve the care and health of the community; however, the translation of research evidence into policy and practice is not guaranteed. Knowledge translation (KT) activities, such as dissemination and end-user engagement by researchers, are important to achieving this goal. This study examined researchers' views on and practices of KT in the field of transfusion medicine. METHODS An anonymous, cross-sectional survey was distributed to transfusion medicine researchers in May 2022 by emailing corresponding authors of papers in four major blood journals, emailing grant recipients, posting on social media, and through international blood operator networks. Comparative analyses were conducted for career stage, work setting, research type, and KT training. RESULTS The final sample included 117 researchers from 33 countries. Most participants reported that research translation was important (86%) and felt it was their responsibility (69%). Fewer than half felt they had the skills to translate their research (45%) or knew which strategies to employ (45%). When examining how research findings are shared, most reported using diffusion activities (86%), including publishing in peer-reviewed journals (74%), or presenting at academic conferences (72%). Fewer used dissemination methods (60%), such as developing educational materials (29%) or writing plain language summaries (30%). Greater use of tailored dissemination strategies was seen among researchers with KT training, whilst traditional diffusion strategies were used more by those working in an academic setting. Most participants had engaged end-users in their research (72%), primarily to consult on a research component (47%) or to involve them in the research process (45%). End-user engagement was greater among researchers with established careers, working in both academic and applied settings, and with KT training. CONCLUSIONS Whilst participating researchers acknowledged the importance of KT, they typically focused on traditional diffusion strategies. This is despite well-established knowledge of the limited impact of these strategies in achieving KT. Those with KT training were more likely to use tailored dissemination strategies and engage end-users in their research. This demonstrates the value of sharing knowledge from the KT field with health researchers to facilitate KT.
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Affiliation(s)
- Amanda Thijsen
- School of Public Health, The University of Sydney, Sydney, Australia.
- Research & Development, Australian Red Cross Lifeblood, Sydney, Australia.
| | - Barbara Masser
- School of Psychology, The University of Queensland, Brisbane, Australia
- Research & Development, Australian Red Cross Lifeblood, Brisbane, Australia
| | - Tanya Ellen Davison
- Research & Innovation, Silver Chain, Melbourne, Australia
- Monash Art, Design and Architecture, Monash University, Melbourne, Australia
| | - Anna Williamson
- School of Public Health, The University of Sydney, Sydney, Australia
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25
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Huang WYC, Ferrell JE, Cheng X. Measuring Molecular Diffusion in Self-Organizing Xenopus Extracts by Fluorescence Correlation Spectroscopy. Methods Mol Biol 2024; 2740:107-115. [PMID: 38393471 DOI: 10.1007/978-1-0716-3557-5_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
The cytoplasm is densely packed with macromolecules and organelles, displaying viscoelastic properties at various scales. How biochemical reactions function efficiently enough in a seemingly jammed environment remains elusive. Cell-free Xenopus laevis extracts represent a powerful system for investigating the biochemistry and biophysics of living systems. Here we present a protocol for characterizing macromolecular diffusion in self-organizing cytoplasmic extracts using fluorescence correlation spectroscopy (FCS), which measures the motions on a distance scale of ~200 nm. The method can also be used to characterize diffusion in the cytoplasm as it progresses through different phases of the cell cycle.
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Affiliation(s)
- William Y C Huang
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - James E Ferrell
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, USA
| | - Xianrui Cheng
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
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26
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Dora M, Paquin-Lefebvre F, Holcman D. Analyzing Photoactivation with Diffusion Models to Study Transport in the Endoplasmic Reticulum Network. Methods Mol Biol 2024; 2772:407-432. [PMID: 38411832 DOI: 10.1007/978-1-0716-3710-4_31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Photoactivation is a paradigm consisting in local molecular fluorescent activation by laser illumination in a chosen region (source) while measuring the concentration at a target region. Data-driven modeling is concerned with the following questions: how from the measurement in these two regions is it possible to infer the properties of molecular propagation? How is it possible to use such responses to infer motions occurring in networks such as the endoplasmic reticulum? In this book chapter, we shall review the data-driven analysis based on diffusion-transport models and numerical simulations to interpret the photoactivation dynamics and extract biophysical parameters. We will discuss modeling approaches to reconstruct local network properties from photoactivation transients.
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Affiliation(s)
- Matteo Dora
- Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France
| | | | - David Holcman
- Applied Mathematics and Computational Biology, Ecole Normale Supérieure, Paris, France
- Churchill College, Cambridge University, Cambridge, UK
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27
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Kunnas P, de Jonge N, Patterson JP. The effect of nanochannel length on in situ loading times of diffusion-propelled nanoparticles in liquid cell electron microscopy. Ultramicroscopy 2024; 255:113865. [PMID: 37856919 DOI: 10.1016/j.ultramic.2023.113865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/28/2023] [Accepted: 10/04/2023] [Indexed: 10/21/2023]
Abstract
Liquid cell transmission electron microscopy is a powerful tool for visualizing nanoparticle (NP) assemblies in liquid environments with nanometer resolution. However, it remains a challenge to control the NP concentration in the high aspect ratio liquid enclosure where the diffusion of dispersed NPs is affected by the exposed surface of the liquid cell walls. Here, we introduce a semi-empirical model based on the 1D diffusion equation, to predict the NP loading time as they pass through the nanochannel into the imaging volume of the liquid cell. We show that loading of NPs into the imaging volume of the liquid cell may take several days if NPs are prone to attach to the surface of the mm-long nanochannel when using an industry-standard flat microchip. As a means to facilitate mass transport via diffusion, we tested a liquid cell incorporating a microchannel geometry resulting in a NP loading time in the order minutes that allowed us to observe the formation of a randomly oriented self-assembled monolayer in situ using scanning transmission electron microscopy.
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Affiliation(s)
- Peter Kunnas
- University of Vienna, Faculty of Physics, VCQ, Vienna A-1090, Austria; University of Vienna, Max Perutz Laboratories, Department of Structural and Computational Biology, Vienna A-1030, Austria
| | - Niels de Jonge
- Leibniz Institute for New Materials, Saarbrücken, Germany; Department of Physics, Saarland University, Saarbrücken, Germany; Bruker AXS, Karlsruhe, Germany
| | - Joseph P Patterson
- Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025, United States.
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Deville K, Charlton N, Askenazi D. Use of extracorporeal therapies to treat life-threatening intoxications. Pediatr Nephrol 2024; 39:105-113. [PMID: 36988694 DOI: 10.1007/s00467-023-05937-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/30/2023]
Abstract
Toxic ingestions are a significant cause of pediatric morbidity and mortality, with some requiring extracorporeal removal for therapy. Given the emergent and life-threatening nature of such scenarios, it is paramount that clinicians caring for intoxicated children be familiar with the subject. This review summarizes the following: (a) the properties of a substance which lend it amenable to removal; (b) the current extracorporeal treatment modalities available for such removal (of which hemodialysis is typically the ideal choice); (c) an introduction and framework to use a quick reference guide from the Extrip organization, which has a website available to guide clinicians' rapid decisions; and (d) new membranes/approaches that may optimize clearance of certain intoxications.
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Affiliation(s)
- Kyle Deville
- Department of Pediatrics, Division of Pediatric Nephrology, University of Alabama at Birmingham, 1600 5Th Ave S, Park Place Suite 202, Birmingham, AL, 35233, USA
| | - Nathan Charlton
- Department of Emergency Medicine, Division of Toxicology, University of Virginia, Charlottesville, USA
| | - David Askenazi
- Department of Pediatrics, Division of Pediatric Nephrology, University of Alabama at Birmingham, 1600 5Th Ave S, Park Place Suite 202, Birmingham, AL, 35233, USA.
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Simon L. Estimation of volatile organic compound exposure concentrations and time to reach a specific dermal absorption using physiologically based pharmacokinetic modeling. J Occup Environ Hyg 2024; 21:1-12. [PMID: 37698510 DOI: 10.1080/15459624.2023.2257774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
A procedure was proposed to estimate dermal exposures based on a physiologically based pharmacokinetic (PBPK) model developed in rats. The study examined vapor concentrations ranging from 500 to 10,000 ppm for dibromomethane and 2,500 to 40,000 ppm for bromochloromethane. These concentrations were reconstructed based on chemical blood levels measured in 4 hr, with errors varying from 0.0% to 52.0%. The PBPK approach adequately predicted the blood concentrations and helped simulate contaminant transport through the stratum corneum and distribution in the body compartments. The proposed technique made it possible to estimate the skin absorption time (SAT) obtained from acute inhalation toxicity data. An inverse relationship exists between the SAT and exposure concentration. The method can be helpful in toxicology and risk assessment of hazardous volatile organic compounds.
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Affiliation(s)
- Laurent Simon
- Otto H. York Department and Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey
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Graham M, Klinge S. Multiscale homogenisation of diffusion in enzymatically-calcified hydrogels. J Mech Behav Biomed Mater 2024; 149:106244. [PMID: 37988844 DOI: 10.1016/j.jmbbm.2023.106244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/10/2023] [Accepted: 11/13/2023] [Indexed: 11/23/2023]
Abstract
Hydrogels are a promising class of material in biomedical and industrial applications, where both the mechanical and diffusion properties play an important role. The wide range of polymers that can be used and the different production methods allows these properties to be specifically tuned to a high degree for their application. Producing tough hydrogels with high stiffness has been a long-standing challenge that has recently been addressed by mineralisation methods. Those methods modify the hydrogel into one with a supporting mineral microstructure that is highly heterogeneous. This work investigates methods to determine the macroscopic diffusion behaviour of heterogeneous gels by a homogenisation method implemented in a finite element framework. This is applied to two recently developed materials by calcifying poly-dimethyl-acrylamide (PDMA) and polyacrylamide hydrogels (PAAm). The former has porous, spherical inclusions obstructing diffusion, while the latter has spherical pores enabling it. For both gels the unobstructed volume can be used as the primary parameter to tune the diffusivity. In PDMA the porosity of the obstructions is shown by multiscale analysis to give a strong, non-linear dependence of the diffusivity on the solute molecule radius. The framework is extended to other materials and comparisons are made to experimental works from the literature.
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Affiliation(s)
- Marc Graham
- Department Structural Mechanics and Analysis, TU Berlin, Str. des 17. Juni 135, Berlin, 10623, Germany.
| | - Sandra Klinge
- Department Structural Mechanics and Analysis, TU Berlin, Str. des 17. Juni 135, Berlin, 10623, Germany
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Komuro R, Kikumoto M. IntraPD model: Leaching of heavy metals from naturally contaminated soils. Environ Pollut 2024; 340:122861. [PMID: 37925013 DOI: 10.1016/j.envpol.2023.122861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/24/2023] [Accepted: 11/01/2023] [Indexed: 11/06/2023]
Abstract
This paper presents a novel method for predicting the migration of heavy metal contaminants in soils that contain heavy metal pollutants deep within the particles, which may cause delayed leaching. The proposed approach, the intraparticle pore-diffusion (IntraPD) model, incorporates both intraparticle diffusion and sorption equilibrium and is utilized to simulate batch leaching tests of heavy metal-contaminated soils using the finite difference method. The IntraPD model can solve the leakage of heavy metals from contaminated soil particles of arbitrary particle size distribution as a one-dimensional, polar-symmetric problem in the spherical coordinate system, assuming the soil particles to be porous perfect spheres. The findings from the simulation demonstrate a notable impact of soil particle size distribution on both the leaching rate and the amount of contaminants. Specifically, the coefficient of uniformity, which indicates the ratio of the maximum to minimum particle size, was identified as a significant factor influencing the leaching rate. When the coefficient of uniformity is less than or equal to 5, it has a combined effect on the leaching rate. However, when the coefficient of uniformity exceeds 5, the maximum particle size becomes the primary determinant of the leaching rate. The proposed model provides a valuable tool for accurately simulating batch leaching tests of naturally contaminated soils with diverse particle size distributions.
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Affiliation(s)
- Risa Komuro
- Department of Civil Engineering, Yokohama National University, Yokohama, Japan
| | - Mamoru Kikumoto
- Department of Civil Engineering, Yokohama National University, Yokohama, Japan.
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Lenaz G, Nesci S, Genova ML. Understanding differential aspects of micro diffusion (channeling) in the Coenzyme Q and Cytochrome c regions of the mitochondrial respiratory system. Mitochondrion 2024; 74:101822. [PMID: 38040170 DOI: 10.1016/j.mito.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/18/2023] [Accepted: 11/26/2023] [Indexed: 12/03/2023]
Abstract
Over the past decades, models of the organization of mitochondrial respiratory system have been controversial. The goal of this perspective is to assess this "conflict of models" by focusing on specific kinetic evidence in the two distinct segments of Coenzyme Q- and Cytochrome c-mediated electron transfer. Respiratory supercomplexes provide kinetic advantage by allowing a restricted diffusion of Coenzyme Q and Cytochrome c, and short-range interaction with their partner enzymes. In particular, electron transfer from NADH is compartmentalized by channeling of Coenzyme Q within supercomplexes, whereas succinate oxidation proceeds separately using the free Coenzyme Q pool. Previous evidence favoring Coenzyme Q random diffusion in the NADH-dependent electron transfer is due to downstream flux interference and misinterpretation of results. Indeed, electron transfer by complexes III and IV via Cytochrome c is less strictly dependent on substrate channeling in mammalian mitochondria. We briefly describe these differences and their physiological implications.
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Affiliation(s)
- Giorgio Lenaz
- University of Bologna, Via Zamboni 33, 40126 Bologna, Italy.
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia, BO, Italy.
| | - Maria Luisa Genova
- Department of Biomedical and Neuromotor Sciences, O.U. Biochemistry, University of Bologna, Via Irnerio 48, 40126 Bologna, BO, Italy.
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Chandrasekar CM, Nespoli L, Bellesia T, Ghaani M, Farris S, Romano D. Fabrication of double layer nanoparticle infused starch-based thermoplastic food packaging system for meat preservation. Int J Biol Macromol 2024; 254:127689. [PMID: 37918611 DOI: 10.1016/j.ijbiomac.2023.127689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 06/11/2023] [Accepted: 10/24/2023] [Indexed: 11/04/2023]
Abstract
The current work aims to produce nanoparticle-infused starch-based bioactive thermoplastic packaging films. The FeO and ZnO nanoparticles were examined to be potential active ingredients for the production of nanoparticle-infused bioactive thermoplastic packaging films. The bio-thermoplastic films infused with FeO and ZnO nanoparticles showed high oxygen scavenging and antimicrobial activity, respectively. Consecutively, both films were combined to form a double-layer Nano-Biothermoplastic packaging system for food preservation. The distribution and diffusion of nanoparticles in starch-based films were examined to be influenced by the amorphous character of starch and the swelling index of the film, respectively. The amorphous property of starch molecules showed a masking effect on the crystalline characteristics of nanoparticles in Nano-Biothermoplastic films. The diffusion of nanoparticles from the Nano-Biothermoplastic packaging system was found to influence the microbial, chemical, and color characteristics of mutton and chicken meat stored at 4 °C.
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Affiliation(s)
| | - Luca Nespoli
- Department of Food Environmental and Nutritional Sciences, University of Milan, Italy
| | - Tommaso Bellesia
- Department of Food Environmental and Nutritional Sciences, University of Milan, Italy
| | - Masoud Ghaani
- Department of Food Environmental and Nutritional Sciences, University of Milan, Italy
| | - Stefano Farris
- Department of Food Environmental and Nutritional Sciences, University of Milan, Italy
| | - Diego Romano
- Department of Food Environmental and Nutritional Sciences, University of Milan, Italy
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Arita Y, Kwee TC, Woo S, Shigeta K, Ishii R, Okawara N, Edo H, Waseda Y, Vargas HA. Biparametric versus Multiparametric Magnetic Resonance Imaging for Assessing Muscle Invasion in Bladder Urothelial Carcinoma with Variant Histology Using the Vesical Imaging-Reporting and Data System. Eur Urol Focus 2024; 10:131-138. [PMID: 37633790 DOI: 10.1016/j.euf.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/27/2023] [Accepted: 08/11/2023] [Indexed: 08/28/2023]
Abstract
BACKGROUND The diagnostic performance of contrast medium-free biparametric magnetic resonance imaging (bpMRI; combining T2-weighted imaging [T2WI] and diffusion-weighted imaging [DWI]) for evaluating variant-histology urothelial carcinoma (VUC) remains unknown. OBJECTIVE To compare the diagnostic performance of bpMRI and multiparametric MRI (mpMRI; combining T2WI, DWI, and dynamic contrast-enhanced MRI]) for assessing muscle invasion of VUC. DESIGN, SETTING, AND PARTICIPANTS This multi-institution retrospective analysis included 118 patients with pathologically verified VUC who underwent bladder mpMRI before transurethral bladder tumor resection between 2010 and 2019. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS Three board-certified radiologists separately evaluated two sets of images, set 1 (bpMRI) and set 2 (mpMRI), in accordance with the Vesical Imaging Reporting and Data System (VI-RADS). The histopathology results were utilized as a reference standard. Receiver operating characteristic curve analysis, Z test, and Wald test were used to assess diagnostic abilities. RESULTS AND LIMITATIONS Sixty-six (55.9%) and 52 (44.1%) of the 118 patients with VUC included in the analysis (mean age, 71 ± 10 yr; 88 men) had muscle-invasive bladder cancer (MIBC) and non-MIBC, respectively. For the diagnosis of MIBC, the areas under the curve for bpMRI were significantly smaller than those for mpMRI (0.870-0.884 vs 0.902-0.923, p < 0.05). The sensitivity of bpMRI was significantly lower than that of mpMRI for all readers with a VI-RADS cutoff score of 4 (65.2-66.7% vs 77.3-80.3%, p < 0.05). The specificity of bpMRI and mpMRI did not differ significantly for all readers (88.5-90.4 vs 88.5-92.3, p > 0.05). A limitation of the study is the limited sample size because of the rarity of VUC. CONCLUSIONS In patients with VUC, on applying VI-RADS, the diagnostic results of bpMRI were inferior to those of mpMRI for evaluating muscle invasion. Therefore, mpMRI-based methods are recommended for evaluating muscle invasiveness of VUC. PATIENT SUMMARY Contrast medium-free biparametric magnetic resonance imaging (bpMRI)-based Vesical Imaging Reporting and Data System (VI-RADS) can accurately diagnose pure urothelial carcinomas, similar to conventional multiparametric magnetic resonance imaging-based VI-RADS. However, bpMRI-based VI-RADS may misdiagnose muscle invasiveness of urothelial carcinoma with variant histology, particularly when its cutoff score is 4.
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Affiliation(s)
- Yuki Arita
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA; Department of Radiology, Keio University School of Medicine, Tokyo, Japan.
| | - Thomas C Kwee
- Department of Radiology, Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, Groningen, The Netherlands
| | - Sungmin Woo
- Department of Radiology, NYU Langone Health, New York, NY, USA
| | - Keisuke Shigeta
- Department of Urology, Keio University School of Medicine, Tokyo, Japan
| | - Ryota Ishii
- Department of Biostatistics, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Naoko Okawara
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - Hiromi Edo
- Department of Radiology, National Defence Medical College, Saitama, Japan
| | - Yuma Waseda
- Department of Urology, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
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Tolonen T, Roine T, Alho K, Leppämäki S, Tani P, Koski A, Laine M, Salmi J. Abnormal wiring of the structural connectome in adults with ADHD. Netw Neurosci 2023; 7:1302-1325. [PMID: 38144696 PMCID: PMC10631790 DOI: 10.1162/netn_a_00326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 06/19/2023] [Indexed: 12/26/2023] Open
Abstract
Current knowledge of white matter changes in large-scale brain networks in adult attention-deficit/hyperactivity disorder (ADHD) is scarce. We collected diffusion-weighted magnetic resonance imaging data in 40 adults with ADHD and 36 neurotypical controls and used constrained spherical deconvolution-based tractography to reconstruct whole-brain structural connectivity networks. We used network-based statistic (NBS) and graph theoretical analysis to investigate differences in these networks between the ADHD and control groups, as well as associations between structural connectivity and ADHD symptoms assessed with the Adult ADHD Self-Report Scale or performance in the Conners Continuous Performance Test 2 (CPT-2). NBS revealed decreased connectivity in the ADHD group compared to the neurotypical controls in widespread unilateral networks, which included subcortical and corticocortical structures and encompassed dorsal and ventral attention networks and visual and somatomotor systems. Furthermore, hypoconnectivity in a predominantly left-frontal network was associated with higher amount of commission errors in CPT-2. Graph theoretical analysis did not reveal topological differences between the groups or associations between topological properties and ADHD symptoms or task performance. Our results suggest that abnormal structural wiring of the brain in adult ADHD is manifested as widespread intrahemispheric hypoconnectivity in networks previously associated with ADHD in functional neuroimaging studies.
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Affiliation(s)
- Tuija Tolonen
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
| | - Timo Roine
- Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo, Finland
- Turku Brain and Mind Center, University of Turku, Turku, Finland
| | - Kimmo Alho
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
- AMI Centre, Aalto Neuroimaging, Aalto University, Espoo, Finland
| | | | - Pekka Tani
- Department of Psychiatry, Helsinki University Hospital, Helsinki, Finland
| | - Anniina Koski
- Department of Psychiatry, Helsinki University Hospital, Helsinki, Finland
| | - Matti Laine
- Turku Brain and Mind Center, University of Turku, Turku, Finland
- Department of Psychology, Åbo Akademi University, Turku, Finland
| | - Juha Salmi
- Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo, Finland
- AMI Centre, Aalto Neuroimaging, Aalto University, Espoo, Finland
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Li J, Yang J, Gao Y, Zhang Z, Gao C, Chen S, Liesche J. Parallel auxin transport via PINs and plasmodesmata during the Arabidopsis leaf hyponasty response. Plant Cell Rep 2023; 43:4. [PMID: 38117314 PMCID: PMC10733227 DOI: 10.1007/s00299-023-03119-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 11/22/2023] [Indexed: 12/21/2023]
Abstract
KEY MESSAGE The leaf hyponasty response depends on tip-to-petiole auxin transport. This transport can happen through two parallel pathways: active trans-membrane transport mediated by PIN proteins and passive diffusion through plasmodesmata. A plant's ability to counteract potential shading by neighboring plants depends on transport of the hormone auxin. Neighbor sensing at the leaf tip triggers auxin production. Once this auxin reaches the abaxial petiole epidermis, it causes cell elongation, which leads to leaf hyponasty. Two pathways are known to contribute to this intercellular tip-to-petiole auxin movement: (i) transport facilitated by plasma membrane-localized PIN auxin transporters and (ii) diffusion enabled by plasmodesmata. We tested if these two modes of transport are arranged sequentially or in parallel. Moreover, we investigated if they are functionally linked. Mutants in which one of the two pathways is disrupted indicated that both pathways are necessary for a full hyponasty response. Visualization of PIN3-GFP and PIN7-GFP localization indicated PIN-mediated transport in parallel to plasmodesmata-mediated transport along abaxial midrib epidermis cells. We found plasmodesmata-mediated cell coupling in the pin3pin4pin7 mutant to match wild-type levels, indicating no redundancy between pathways. Similarly, PIN3, PIN4 and PIN7 mRNA levels were unaffected in a mutant with disrupted plasmodesmata pathway. Our results provide mechanistic insight on leaf hyponasty, which might facilitate the manipulation of the shade avoidance response in crops.
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Affiliation(s)
- Jiazhou Li
- College of Life Sciences, Northwest A & F University, Yangling, 712100, China
- Biomass Energy Center for Arid and Semiarid Lands, Northwest A & F University, Yangling, 712100, China
- State Key Laboratory of Stress Biology for Arid Areas, Northwest A & F University, Yangling, 712100, China
| | - Jintao Yang
- College of Life Sciences, Northwest A & F University, Yangling, 712100, China
- Biomass Energy Center for Arid and Semiarid Lands, Northwest A & F University, Yangling, 712100, China
- State Key Laboratory of Stress Biology for Arid Areas, Northwest A & F University, Yangling, 712100, China
| | - Yibo Gao
- College of Life Sciences, Northwest A & F University, Yangling, 712100, China
| | - Ziyu Zhang
- College of Life Sciences, Northwest A & F University, Yangling, 712100, China
| | - Chen Gao
- Institute for Molecular Physiology, University of Düsseldorf, 40225, Düsseldorf, Germany
| | - Shaolin Chen
- College of Life Sciences, Northwest A & F University, Yangling, 712100, China
- Biomass Energy Center for Arid and Semiarid Lands, Northwest A & F University, Yangling, 712100, China
| | - Johannes Liesche
- College of Life Sciences, Northwest A & F University, Yangling, 712100, China.
- Biomass Energy Center for Arid and Semiarid Lands, Northwest A & F University, Yangling, 712100, China.
- State Key Laboratory of Stress Biology for Arid Areas, Northwest A & F University, Yangling, 712100, China.
- Institute of Biology, University of Graz, Schubertstraße 51, 8010, Graz, Austria.
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Sharma V, Fessler F, Thalmann F, Marques CM, Stocco A. Rotational and translational drags of a Janus particle close to a wall and a lipid membrane. J Colloid Interface Sci 2023; 652:2159-2166. [PMID: 37713952 DOI: 10.1016/j.jcis.2023.09.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 09/17/2023]
Abstract
HYPOTHESIS Measuring rotational and translational Brownian motion of single spherical particles reveals dissipations due to the interaction between the particle and the environment. EXPERIMENTS In this article, we show experiments where the in-plane translational and the two rotational drag coefficients of a single spherical Brownian particle can be measured. These particle drags are functions of the particle size and of the particle-wall distance, and of the viscous dissipations at play. We measure drag coefficients for Janus particles close to a solid wall and close to a lipid bilayer membrane. FINDINGS For a particle close to a wall, we show that according to hydrodynamic models, particle-wall distance and particle size can be determined. For a particle partially wrapped by lipid membranes, in absence of strong binding interactions, translational and rotational drags are significantly larger than the ones of non-wrapped particles. Beside the effect of the membrane viscosity, we show that dissipations in the deformed membrane cap region strongly contribute to the drag coefficients.
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Affiliation(s)
- Vaibhav Sharma
- Institut Charles Sadron, CNRS UPR22-University of Strasbourg, 23 rue du Loess, Strasbourg 67034, France
| | - Florent Fessler
- Institut Charles Sadron, CNRS UPR22-University of Strasbourg, 23 rue du Loess, Strasbourg 67034, France
| | - Fabrice Thalmann
- Institut Charles Sadron, CNRS UPR22-University of Strasbourg, 23 rue du Loess, Strasbourg 67034, France
| | - Carlos M Marques
- ENS Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie UMR 5182, F-69342 Lyon, France
| | - Antonio Stocco
- Institut Charles Sadron, CNRS UPR22-University of Strasbourg, 23 rue du Loess, Strasbourg 67034, France.
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Joshi H, Jha BK. 2D dynamic analysis of the disturbances in the calcium neuronal model and its implications in neurodegenerative disease. Cogn Neurodyn 2023; 17:1637-1648. [PMID: 37974576 PMCID: PMC10640547 DOI: 10.1007/s11571-022-09903-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/10/2022] [Accepted: 10/14/2022] [Indexed: 11/16/2022] Open
Abstract
Ca2+ signaling is an essential function of neurons to control synaptic activity, memory formation, fertilization, proliferation, etc. Protein and voltage-dependent calcium channels (VDCCs) maintain an adequate level of calcium concentration ([Ca2+]). An alteration in [Ca2+] leads to the death of the neurons that start the primary symptoms of the disease. The present study deals with cell memory-based mathematical modeling of Ca2+ that is characterized by the presence of protein and VDCC. We developed a two-dimensional Ca2+ neuronal model to study the spatiotemporal behavior of the Ca2+ profile. All principal parameters like buffer concentration, diffusion coefficient, VDCC fluxes, etc. are incorporated in this model. Apposite initial and boundary conditions are applied to the physiology of the problem. We obtained an approximate Ca2+ profile by the fractional integral transform method. The application of obtained results is performed to provide its implications to estimate the [Ca2+] in neurodegenerative disease. It is observed that the protein and VDCC provide a significant impact in the presence of cell memory. The memory of cells shrinks the Ca2+ flow from elevation and provides better results to estimated Ca2+ flow in the disease state.
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Affiliation(s)
- Hardik Joshi
- Department of Mathematics, LJ Institute of Engineering and Technology, LJ University, Ahmedabad, 382210 India
| | - Brajesh Kumar Jha
- Department of Mathematics, School of Technology, Pandit Deendayal Energy University, Gandhinagar, 382007 India
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Krupčíková S, Stiborek M, Šimek Z, Vrana B. Factors affecting diffusion of polar organic compounds in agarose hydrogel applied to control mass transfer in passive samplers. Environ Sci Pollut Res Int 2023; 30:122470-122481. [PMID: 37968489 DOI: 10.1007/s11356-023-30929-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 11/02/2023] [Indexed: 11/17/2023]
Abstract
Diffusive hydrogel-based passive sampler (HPS) based on diffusive gradients in thin films (DGT) is designed for monitoring polar organic contaminants in the aquatic environment. DGT technique controls the compound's overall uptake rate by adding a hydrogel layer of known thickness, which minimizes the importance of the resistive water boundary layer in the compound uptake process. In this work, we investigated several factors which may influence the diffusion of a range of aquatic contaminants in 1.5% agarose hydrogel. Diffusion in hydrogel was tested using the sheet stacking method. We demonstrated that a thin nylon netting incorporated into the diffusive hydrogel for mechanical strengthening does not significantly affect the diffusion of 11 perfluoroalkyl compounds. Further, we investigated the effect of pH in the range from 3 to 11 on the diffusion of a range of 39 aromatic amines (AAs) -36 aromatic, 2 aliphatic, and azobenzene in hydrogel. AAs were chosen as representatives of compounds with pH-dependent dissociation in water. Analysis of variance showed no significant difference in mean diffusion coefficient log D value at five pH values. The demonstration that the diffusion coefficient D and thus the sampling rate Rs are independent on pH simplifies the interpretation of data from field studies because we can neglect the influence of pH on the Rs. log D values (m2 s-1) of tested AAs ranged from to - 9.77 for 3,3'-dimethylbenzidine to - 9.19 for azobenzene. A negative correlation of log D with molar mass (log M) and molecular volume (log Vm) was observed (R = - 0.57 and - 0.56, respectively). The diffusion coefficient presents a critical parameter for the sampling rate estimation of HPS. Theoretical sampling rates Rs of AAs were calculated for a HPS using the average D values. Theoretical Rs values calculated for AAs at 22°C ranged from 29 mL day-1 for 3,3'-dimethylbenzidine to 106 mL day-1 for 2-aminopyridine. Our calculated values of Rs are in the same range as those already published for a range of low-molecular polar organic contaminants, which supports the possibility of deriving sampler performance parameters in the field from laboratory-derived diffusivity of analytes in hydrogel.
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Affiliation(s)
- Simona Krupčíková
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 61137, Brno, Czech Republic
| | - Marek Stiborek
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 61137, Brno, Czech Republic
| | - Zdeněk Šimek
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 61137, Brno, Czech Republic
| | - Branislav Vrana
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 61137, Brno, Czech Republic.
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Kascenas A, Sanchez P, Schrempf P, Wang C, Clackett W, Mikhael SS, Voisey JP, Goatman K, Weir A, Pugeault N, Tsaftaris SA, O'Neil AQ. The role of noise in denoising models for anomaly detection in medical images. Med Image Anal 2023; 90:102963. [PMID: 37769551 DOI: 10.1016/j.media.2023.102963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 08/22/2023] [Accepted: 09/07/2023] [Indexed: 10/03/2023]
Abstract
Pathological brain lesions exhibit diverse appearance in brain images, in terms of intensity, texture, shape, size, and location. Comprehensive sets of data and annotations are difficult to acquire. Therefore, unsupervised anomaly detection approaches have been proposed using only normal data for training, with the aim of detecting outlier anomalous voxels at test time. Denoising methods, for instance classical denoising autoencoders (DAEs) and more recently emerging diffusion models, are a promising approach, however naive application of pixelwise noise leads to poor anomaly detection performance. We show that optimization of the spatial resolution and magnitude of the noise improves the performance of different model training regimes, with similar noise parameter adjustments giving good performance for both DAEs and diffusion models. Visual inspection of the reconstructions suggests that the training noise influences the trade-off between the extent of the detail that is reconstructed and the extent of erasure of anomalies, both of which contribute to better anomaly detection performance. We validate our findings on two real-world datasets (tumor detection in brain MRI and hemorrhage/ischemia/tumor detection in brain CT), showing good detection on diverse anomaly appearances. Overall, we find that a DAE trained with coarse noise is a fast and simple method that gives state-of-the-art accuracy. Diffusion models applied to anomaly detection are as yet in their infancy and provide a promising avenue for further research. Code for our DAE model and coarse noise is provided at: https://github.com/AntanasKascenas/DenoisingAE.
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Affiliation(s)
- Antanas Kascenas
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom; University of Glasgow, Glasgow G12 8QQ, United Kingdom.
| | - Pedro Sanchez
- University of Edinburgh, Kings Buildings, Edinburgh EH9 3FG, United Kingdom
| | - Patrick Schrempf
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom
| | - Chaoyang Wang
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom
| | - William Clackett
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom
| | - Shadia S Mikhael
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom
| | - Jeremy P Voisey
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom
| | - Keith Goatman
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom
| | - Alexander Weir
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom
| | | | - Sotirios A Tsaftaris
- University of Edinburgh, Kings Buildings, Edinburgh EH9 3FG, United Kingdom; The Alan Turing Institute, London, United Kingdom
| | - Alison Q O'Neil
- Canon Medical Research Europe, Bonnington Bond, 2 Anderson Pl, Edinburgh EH6 5NP, United Kingdom; University of Edinburgh, Kings Buildings, Edinburgh EH9 3FG, United Kingdom
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Vietti Violi N, Gavane S, Argiriadi P, Law A, Heiba S, Bekhor EY, Babb JS, Ghesani M, Labow DM, Taouli B. FDG-PET/MRI for the preoperative diagnosis and staging of peritoneal carcinomatosis: a prospective multireader pilot study. Abdom Radiol (NY) 2023; 48:3634-3642. [PMID: 36308554 DOI: 10.1007/s00261-022-03703-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/04/2022] [Accepted: 10/05/2022] [Indexed: 12/01/2022]
Abstract
PURPOSE To assess the diagnostic performance of FDG-PET/MRI for the preoperative diagnosis and staging of peritoneal carcinomatosis (PC) using surgical Sugarbaker's PC index (PCI) as the reference in a multireader pilot study. METHODS Fourteen adult patients (M/F: 3/11, mean age: 57 ± 12 year) with PC were prospectively included in this single-center study. Patients underwent FDG-PET/MRI prior to surgery (mean delay: 14 d, range: 1-63 d). Images were reviewed independently by 2 abdominal radiologists and 2 nuclear medicine physicians. The radiologists assessed contrast-enhanced abdominal MR images, while the nuclear medicine physicians assessed PET images fused with T2-weighted images. The abdomen was divided in 13 regions, scored from 0 to 3. A hybrid FDG-PET/MRI radiological PCI was created by combining the study data. Radiological PCI was compared to the surgical PCI on a per-patient and per-region basis. Inter-reader agreement was evaluated. RESULTS Mean surgical PCI was 10 ± 8 (range: 0-24). Inter-reader agreement was almost perfect for all sets for radiologic PCI (Kappa: 0.81-0.98). PCI scores for all reading sets significantly correlated with the surgical PCI score (r range: 0.57-0.74, p range: < 0.001-0.003). Pooled per-patient sensitivity, specificity, and accuracy were 75%/50%/71.4% for MRI, 66.7%/50%/64.3% for FDG-PET, and 91.7%/50%/85.7% for FDG-PET/MRI, without significant difference (p value range 0.13-1). FDG-PET/MRI achieved 100% sensitivity and 100% specificity for a cutoff PCI of 20. Per-region sensitivity and accuracy were lower: 37%/61.8% for MRI, 17.8%/64.3% for FDG-PET, and 52.7%/60.4% for FDG-PET/MRI, with significantly higher sensitivity for FDG-PET/MRI. Per-region specificity was higher for FDG-PET (95%) compared to MRI (78.4%) and FDG-PET/MRI (66.5%). CONCLUSION FDG-PET/MRI achieved an excellent diagnostic accuracy per-patient and weaker performance per-region for detection of PC. The added value of PET/MRI compared to MRI and FDG-PET remains to be determined.
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Affiliation(s)
- Naik Vietti Violi
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine Mount Sinai, 1470 Madison Avenue, New York, NY, 10029, USA
- Department of Radiology, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Somali Gavane
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Pamela Argiriadi
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Amy Law
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sherif Heiba
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Eliahu Y Bekhor
- Department of Surgery, Rabin Medical Center, Petah Tikva, Israel
| | - James S Babb
- Department of Radiology, New York University Langone Medical Center, New York, NY, USA
| | - Munir Ghesani
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Daniel M Labow
- Division of Surgical Oncology, Department of Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Bachir Taouli
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine Mount Sinai, 1470 Madison Avenue, New York, NY, 10029, USA.
- Department of Diagnostic, Molecular and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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Arif S, Moulin VJ. Extracellular vesicles on the move: Traversing the complex matrix of tissues. Eur J Cell Biol 2023; 102:151372. [PMID: 37972445 DOI: 10.1016/j.ejcb.2023.151372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 11/10/2023] [Accepted: 11/10/2023] [Indexed: 11/19/2023] Open
Abstract
Extracellular vesicles are small particles involved in intercellular signaling. They are produced by virtually all cell types, transport biological molecules, and are released into the extracellular space. Studies on extracellular vesicles have become more numerous in recent years, leading to promising research on their potential impact on health and disease. Despite significant progress in understanding the bioactivity of extracellular vesicles, most in vitro and in vivo studies overlook their transport through the extracellular matrix in tissues. The interaction or free diffusion of extracellular vesicles in their environment can provide valuable insights into their efficacy and function. Therefore, understanding the factors that influence the transport of extracellular vesicles in the extracellular matrix is essential for the development of new therapeutic approaches that involve the use of these extracellular vesicles. This review discusses the importance of the interaction between extracellular vesicles and the extracellular matrix and the different factors that influence their diffusion. In addition, we evaluate their role in tissue homeostasis, pathophysiology, and potential clinical applications. Understanding the complex interaction between extracellular vesicles and the extracellular matrix is critical in order to develop effective strategies to target specific cells and tissues in a wide range of clinical applications.
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Affiliation(s)
- Syrine Arif
- Faculté de Médecine, Université Laval, Quebec City, QC G1V 0A6, Canada; Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC G1S 4L8, Canada; Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Quebec City, QC G1J 1Z4, Canada
| | - Véronique J Moulin
- Faculté de Médecine, Université Laval, Quebec City, QC G1V 0A6, Canada; Centre de Recherche du CHU de Québec-Université Laval, Quebec City, QC G1S 4L8, Canada; Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Quebec City, QC G1J 1Z4, Canada; Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, QC, Canada.
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Zhu Z, Yao Z, Zheng X, Qi G, Li Y, Mazur N, Gao X, Gong Y, Cong B. Drug-target affinity prediction method based on multi-scale information interaction and graph optimization. Comput Biol Med 2023; 167:107621. [PMID: 37907030 DOI: 10.1016/j.compbiomed.2023.107621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/16/2023] [Accepted: 10/23/2023] [Indexed: 11/02/2023]
Abstract
Drug-target affinity (DTA) prediction as an emerging and effective method is widely applied to explore the strength of drug-target interactions in drug development research. By predicting these interactions, researchers can assess the potential efficacy and safety of candidate drugs at an early stage, narrowing down the search space for therapeutic targets and accelerating the discovery and development of new drugs. However, existing DTA prediction models mainly use graphical representations of drug molecules, which lack information on interactions between individual substructures, thus affecting prediction accuracy and model interpretability. Therefore, transformer and diffusion on drug graphs in DTA prediction (TDGraphDTA) are introduced to predict drug-target interactions using multi-scale information interaction and graph optimization. An interactive module is integrated into feature extraction of drug and target features at different granularity levels. A diffusion model-based graph optimization module is proposed to improve the representation of molecular graph structures and enhance the interpretability of graph representations while obtaining optimal feature representations. In addition, TDGraphDTA improves the accuracy and reliability of predictions by capturing relationships and contextual information between molecular substructures. The performance of the proposed TDGraphDTA in DTA prediction was verified on three publicly available benchmark datasets (Davis, Metz, and KIBA). Compared with state-of-the-art baseline models, it achieved better results in terms of consistency index, R-squared, etc. Furthermore, compared with some existing methods, the proposed TDGraphDTA is demonstrated to have better structure capturing capabilities by visualizing the feature capturing capabilities of the model using Grad-AAM toxicity labels in the ToxCast dataset. The corresponding source codes are available at https://github.com/Lamouryz/TDGraph.
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Affiliation(s)
- Zhiqin Zhu
- College of Automation, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Zheng Yao
- College of Automation, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Xin Zheng
- College of Automation, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Guanqiu Qi
- Computer Information Systems Department, State University of New York at Buffalo State, Buffalo, NY 14222, USA.
| | - Yuanyuan Li
- College of Automation, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Neal Mazur
- Computer Information Systems Department, State University of New York at Buffalo State, Buffalo, NY 14222, USA.
| | - Xinbo Gao
- College of Automation, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Yifei Gong
- Faculty of applied science & engineering, the Edward S. Rogers Sr. Department of Electrical & Computer Engineering (ECE), University of Toronto at Toronto, ON M5S, Canada.
| | - Baisen Cong
- Diagnostics Digital, DH(Shanghai) Diagnostics Co, Ltd, a Danaher company, Shanghai, 200335, China.
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Payen M, Didier M, Vialle R, Lehericy S, Fitoussi F, Bachy M. MRI of brachial plexus using diffusion tensor imaging: a pilot study for the use of resolve sequence surgical and radiologic anatomy. Surg Radiol Anat 2023; 45:1567-1577. [PMID: 37884742 DOI: 10.1007/s00276-023-03255-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 10/06/2023] [Indexed: 10/28/2023]
Abstract
BACKGROUND Clinical exam is the goldstandard for surgical indication. ENMG and conventional MRI are insufficient to understand the highly variable clinical presentation of brachial plexus (BP) lesions. DTI is based on motion of water molecules and can explore nerve function. PURPOSE This pilot study of healthy subjects aimed to develop RESOLVE sequence for BP exploration using diffusion MRI. The main objective was to provide complete precise information from DTI cartography associated with anatomical data. METHODS Six healthy volunteers were scanned using 3T PRISMA scanner with anatomic 3D STIR SPACE and RESOLVE diffusion sequences. Diffusion parametric maps of fractional anisotropy (FA) were extracted from RESOLVE acquisitions. A reproducible method for roots volumes and angles measurements was created using 3DSlicer. ROI were segmented on Mean B0 sequences. FA measurements were obtained with ROI on Mean B0 sequences. RESULTS RESOLVE sequence was adapted to the BP. Mean FA was 0.30. Angles measurements on 3D STIR SPACE sequences showed increasing values from proximal to distal roots with an 0.6 ICC. Volume measurements on anatomic sequences varied widely from one root to another but did not show any significant difference on laterality. CONCLUSIONS A new and reproducible method for BP exploration was developed, using MRI RESOLVE DTI sequences. Complete mapping was obtained but a low resolution of track density imaging did not allow to exploit distal nerves. Deterministic tractography principal limit was the lack of resolution. Extraction of diffusion, volumetric and angular parameters of the plexus roots, and scripts creation for image processing was adapted to the healthy BP.
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Affiliation(s)
- M Payen
- Clinique Chirurgicale Infantile, Hôpital Charles-Nicolle, CHU Rouen, 37 Boulevard Gambetta, 76038, Rouen, France.
- Department of Pediatric Orthopaedics, Sorbonne Université, Armand Trousseau Hospital, 26 Avenue du Dr Arnold Netter, 75571, Paris Cedex 12, France.
- Clinical Research Group on Robotics and Surgical Innovations, GRC-33, Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France.
- The MAMUTH Hospital-University Federation for Innovative Therapies in Musculoskeletal Diseases-Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France.
| | - M Didier
- Paris Brain Institute-ICM, Center for NeuroImaging Research-CENIR, Paris, France
| | - R Vialle
- Department of Pediatric Orthopaedics, Sorbonne Université, Armand Trousseau Hospital, 26 Avenue du Dr Arnold Netter, 75571, Paris Cedex 12, France
- Clinical Research Group on Robotics and Surgical Innovations, GRC-33, Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France
- The MAMUTH Hospital-University Federation for Innovative Therapies in Musculoskeletal Diseases-Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France
| | - S Lehericy
- Paris Brain Institute-ICM, Center for NeuroImaging Research-CENIR, Paris, France
- Sorbonne University, UPMC Univ Paris 06, INSERM U1127, CNRS, UMR 7225, Pitié-Salpêtrière Hospital, Paris, France
- Investigations and Therapeutics" (MOV'IT), ICM Team "Movement, Paris, France
- Department of Neuroradiology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - F Fitoussi
- Department of Pediatric Orthopaedics, Sorbonne Université, Armand Trousseau Hospital, 26 Avenue du Dr Arnold Netter, 75571, Paris Cedex 12, France
- Clinical Research Group on Robotics and Surgical Innovations, GRC-33, Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France
- The MAMUTH Hospital-University Federation for Innovative Therapies in Musculoskeletal Diseases-Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France
| | - M Bachy
- Department of Pediatric Orthopaedics, Sorbonne Université, Armand Trousseau Hospital, 26 Avenue du Dr Arnold Netter, 75571, Paris Cedex 12, France
- Clinical Research Group on Robotics and Surgical Innovations, GRC-33, Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France
- The MAMUTH Hospital-University Federation for Innovative Therapies in Musculoskeletal Diseases-Sorbonne Université, Armand Trousseau Hospital, 26, Avenue du Docteur Arnold Netter, 75571, Paris Cedex 12, France
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Makino Y, Ohno N, Miyati T, Hori N, Matsuura Y, Kobayashi S, Gabata T. Tri- and bi-exponential diffusion analyses of the kidney: effect of respiratory-controlled acquisition on diffusion parameters. Radiol Phys Technol 2023; 16:478-487. [PMID: 37523080 DOI: 10.1007/s12194-023-00734-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 07/12/2023] [Accepted: 07/12/2023] [Indexed: 08/01/2023]
Abstract
This study examined whether respiratory-controlled acquisition influences diffusion parameters obtained with intravoxel incoherent motion (IVIM) analysis using tri-exponential and bi-exponential models. Ten healthy volunteers were examined on a 3.0 T MRI system to obtain coronal diffusion-weighted images of both kidneys. The participants were scanned twice using respiratory-triggering (RT) and free-breathing (FB) acquisition to assess the repeatability of the measurements. We determined mean signal intensities in the renal cortex at each b value. Then, perfusion-related diffusion coefficient (Dp), fast-free diffusion coefficient (Df), slow-restricted diffusion coefficient (Ds), and their corresponding fractions (Fp, Ff, and Fs, respectively) were calculated using tri-exponential function. Moreover, perfusion-related diffusion coefficient (D*), the fraction (F), and perfusion-independent diffusion coefficient (D) were calculated using bi-exponential function. Normalized root-mean-square errors for the tri- and bi-exponential analyses (nRMSEtri and nRMSEbi, respectively) were determined to assess the deviation of the fitted to measured data, i.e., the fitting accuracy. Additionally, repeatability coefficients (RCs) were calculated from Bland-Altman plots to evaluate the repeatability of each diffusion parameter. These values were compared between the RT and FB groups. Dp and D* in the RT group were significantly lower than those in the FB group (P < 0.05). In addition, the RT group showed significantly lower nRMSEtri and nRMSEbi values than those in the FB group (P < 0.05). Moreover, Dp, Ds, Fs, and D* at RT showed lower RC values than those at FB. Respiratory-controlled acquisition affects perfusion-related diffusion parameters of the kidney obtained using tri-exponential and bi-exponential analyses.
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Affiliation(s)
- Yuki Makino
- Radiology Division, Kanazawa University Hospital, 13-1 Takara-Machi, Kanazawa, Ishikawa, 9208641, Japan
| | - Naoki Ohno
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 9200942, Japan.
| | - Tosiaki Miyati
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 9200942, Japan
| | - Naoki Hori
- Radiology Division, Kanazawa University Hospital, 13-1 Takara-Machi, Kanazawa, Ishikawa, 9208641, Japan
| | - Yukihiro Matsuura
- Radiology Division, Kanazawa University Hospital, 13-1 Takara-Machi, Kanazawa, Ishikawa, 9208641, Japan
| | - Satoshi Kobayashi
- Radiology Division, Kanazawa University Hospital, 13-1 Takara-Machi, Kanazawa, Ishikawa, 9208641, Japan
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 9200942, Japan
- Department of Radiology, Kanazawa University Hospital, 13-1 Takara-Machi, Kanazawa, Ishikawa, 9208641, Japan
| | - Toshifumi Gabata
- Department of Radiology, Kanazawa University Hospital, 13-1 Takara-Machi, Kanazawa, Ishikawa, 9208641, Japan
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Kamimura K, Nakano T, Hasegawa T, Nakajo M, Yamada C, Kamimura Y, Akune K, Ejima F, Ayukawa T, Nagano H, Takumi K, Nakajo M, Higa N, Yonezawa H, Hanaya R, Kirishima M, Tanimoto A, Iwanaga T, Imai H, Feiweier T, Yoshiura T. Differentiating primary central nervous system lymphoma from glioblastoma by time-dependent diffusion using oscillating gradient. Cancer Imaging 2023; 23:114. [PMID: 38037172 PMCID: PMC10691025 DOI: 10.1186/s40644-023-00639-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/22/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND This study aimed to elucidate the impact of effective diffusion time setting on apparent diffusion coefficient (ADC)-based differentiation between primary central nervous system lymphomas (PCNSLs) and glioblastomas (GBMs) and to investigate the usage of time-dependent diffusion magnetic resonance imaging (MRI) parameters. METHODS A retrospective study was conducted involving 21 patients with PCNSLs and 66 patients with GBMs using diffusion weighted imaging (DWI) sequences with oscillating gradient spin-echo (Δeff = 7.1 ms) and conventional pulsed gradient (Δeff = 44.5 ms). In addition to ADC maps at the two diffusion times (ADC7.1 ms and ADC44.5 ms), we generated maps of the ADC changes (cADC) and the relative ADC changes (rcADC) between the two diffusion times. Regions of interest were placed on enhancing regions and non-enhancing peritumoral regions. The mean and the fifth and 95th percentile values of each parameter were compared between PCNSLs and GBMs. The area under the receiver operating characteristic curve (AUC) values were used to compare the discriminating performances among the indices. RESULTS In enhancing regions, the mean and fifth and 95th percentile values of ADC44.5 ms and ADC7.1 ms in PCNSLs were significantly lower than those in GBMs (p = 0.02 for 95th percentile of ADC44.5 ms, p = 0.04 for ADC7.1 ms, and p < 0.01 for others). Furthermore, the mean and fifth and 95th percentile values of cADC and rcADC were significantly higher in PCNSLs than in GBMs (each p < 0.01). The AUC of the best-performing index for ADC7.1 ms was significantly lower than that for ADC44.5 ms (p < 0.001). The mean rcADC showed the highest discriminating performance (AUC = 0.920) among all indices. In peritumoral regions, no significant difference in any of the three indices of ADC44.5 ms, ADC7.1 ms, cADC, and rcADC was observed between PCNSLs and GBMs. CONCLUSIONS Effective diffusion time setting can have a crucial impact on the performance of ADC in differentiating between PCNSLs and GBMs. The time-dependent diffusion MRI parameters may be useful in the differentiation of these lesions.
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Affiliation(s)
- Kiyohisa Kamimura
- Department of Advanced Radiological Imaging, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.
| | - Tsubasa Nakano
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Tomohito Hasegawa
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Masanori Nakajo
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Chihiro Yamada
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Yoshiki Kamimura
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Kentaro Akune
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Fumitaka Ejima
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Takuro Ayukawa
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Hiroaki Nagano
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Koji Takumi
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Masatoyo Nakajo
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Nayuta Higa
- Department of Neurosurgery, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Hajime Yonezawa
- Department of Neurosurgery, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Ryosuke Hanaya
- Department of Neurosurgery, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Mari Kirishima
- Department of Pathology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Akihide Tanimoto
- Department of Pathology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Takashi Iwanaga
- Department of Radiological Technology, Kagoshima University Hospital, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Hiroshi Imai
- Siemens Healthcare K.K., Gate City Osaki West Tower, 1-11-1 Osaki, Shinagawa-Ku, Tokyo, 141-8644, Japan
| | | | - Takashi Yoshiura
- Department of Advanced Radiological Imaging, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
- Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
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Martín-Noguerol T, Díaz-Angulo C, Vilanova C, Barceló A, Barceló J, Luna A, Vilanova JC. How to do and evaluate DWI and DCE-MRI sequences for diabetic foot assessment. Skeletal Radiol 2023:10.1007/s00256-023-04518-x. [PMID: 38001301 DOI: 10.1007/s00256-023-04518-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 11/15/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023]
Abstract
MRI evaluation of the diabetic foot is still a challenge not only from an interpretative but also from a technical point of view. The incorporation of advanced sequences such as diffusion-weighted imaging (DWI) and dynamic contrast-enhanced (DCE) MRI into standard protocols for diabetic foot assessment could aid radiologists in differentiating between neuropathic osteoarthropathy (Charcot's foot) and osteomyelitis. This distinction is crucial as both conditions can coexist in diabetic patients, and they require markedly different clinical management and have distinct prognoses. Over the past decade, several studies have explored the effectiveness of DWI and dynamic contrast-enhanced MRI (DCE-MRI) in distinguishing between septic and reactive bone marrow, as well as soft tissue involvement in diabetic patients, yielding promising results. DWI, without the need for exogenous contrast, can provide insights into the cellularity of bone marrow and soft tissues. DCE-MRI allows for a more precise evaluation of soft tissue and bone marrow perfusion compared to conventional post-gadolinium imaging. The data obtained from these sequences will complement the traditional MRI approach in assessing the diabetic foot. The objective of this review is to familiarize readers with the fundamental concepts of DWI and DCE-MRI, including technical adjustments and practical tips for image interpretation in diabetic foot cases.
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Affiliation(s)
| | | | - Cristina Vilanova
- Department of Orthopaedic Surgery, Hospital Germans Trias I Pujol, Badalona, Barcelona, Spain
| | - Ariadna Barceló
- Department of Radiology, Complejo Asistencial Universitario de Palencia (CAUPA), Palencia, Spain
| | - Joaquim Barceló
- Department of Radiology, Clinical Girona, Institute of Diagnostic Imaging (IDI) Girona, University of Girona, Girona, Spain
| | - Antonio Luna
- MRI unit, Radiology Department, HT medica, Carmelo Torres 2, 23007, Jaén, Spain
| | - Joan C Vilanova
- Department of Radiology, Clinical Girona, Institute of Diagnostic Imaging (IDI) Girona, University of Girona, Girona, Spain
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Cao J, Ou T, Geng S, Zhang X, Zhang D, Zhang L, Luo D, Zhang X, Qin J, Yang X. Constructing stable V 2O 5/V 6O 13 heterostructure interface with fast Zn 2+ diffusion kinetics for ultralong lifespan zinc-ion batteries. J Colloid Interface Sci 2023; 656:495-503. [PMID: 38007941 DOI: 10.1016/j.jcis.2023.11.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/13/2023] [Accepted: 11/21/2023] [Indexed: 11/28/2023]
Abstract
Given their plentiful reserves, impressive safety features, and economical pricing, aqueous zinc - ion batteries (ZIBs) have positioned themselves as strong competitors to lithium - ion batteries. Yet, the scarcity of available cathode materials poses a challenge to their continued development. In this study, a V2O5/V6O13 heterostructure has been synthesized using a one - pot hydrothermal approach and employed as the cathode material for ZIBs. As evidenced by both experimental and theoretical findings, V2O5/V6O13 heterostructure delivers a rapid electrons and ions diffusion kinetics promoted by the stable interface and strong electronic coupling with significant charge transfer between V2O5 and V6O13, as well as a stable interface achieved by adjusting V - O bond length. Consequently, the optimized V2O5/V6O13 heterostructure cathode of ZIBs demonstrates exceptional capacity (338 mAh g-1 at 0.1 A g-1), remarkable cycling stability (92.96 % retained after 1400 cycles at 1 A g-1). Through comprehensive theoretical calculations and ex situ characterization, the kinetic analysis and storage mechanism of Zn2+ are thoroughly investigated, providing a solid theoretical foundation for the advancement of novel V - based cathode materials aimed at enhancing the performance of ZIBs.
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Affiliation(s)
- Jin Cao
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China; Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China.
| | - Tianzhuo Ou
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Sining Geng
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Xueqing Zhang
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Dongdong Zhang
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
| | - Lulu Zhang
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Ding Luo
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China
| | - Xinyu Zhang
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
| | - Jiaqian Qin
- Center of Excellence on Advanced Materials for Energy Storage, Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Xuelin Yang
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China; Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China.
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Pellen N, Reste JYL, Argouarc'h J. Modelling the spread of cystic fibrosis in Brittany using genealogical data over five centuries. J Cyst Fibros 2023:S1569-1993(23)01679-X. [PMID: 37985320 DOI: 10.1016/j.jcf.2023.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/13/2023] [Accepted: 11/13/2023] [Indexed: 11/22/2023]
Abstract
BACKGROUND The French region of Brittany presents one of the highest cystic fibrosis (CF)-causing allele frequency in Europe. Here, we tested two hypotheses: i) CF-causing allele carriers arrived by sea in the middle of the 1st millennium AD, and ii) a selective advantage for healthy carriers explains this high rate. METHODS From the census of cystic fibrosis patients, frequency maps of the most widespread alleles were established. A mathematical model was developed, based on birth date and place of the ancestors of these patients over 5 centuries, to determine the distribution of local migrations and their parameters for inter-generational intervals of 32 years. This model was applied to simulate the spread of CF-causing variant carriers, according to different scenarios that corresponded to the immigration of a given number of variant carriers at different times (year) and places, and to compare their results to current frequency maps. RESULTS Migrants carrying a CFTR variant settled in several locations, around which they spread, notably in Central Brittany (F508del variant), Léon (G551D variant) and Cornouaille (1078delT variant). Until the end of the 18th century, the spreading of disease-causing allele carriers was relatively slow, and allele frequencies progressively increased. Then, the mean migration distances increased rapidly, leading to a decline in local frequencies. CONCLUSIONS The main CFTR variants could only have reached their current frequencies through a selective advantage for healthy carriers of the order of 4-6 % at each generation. For the most widespread variant (F508del), the model supports the hypothesis that it appeared around 190 generations ago.
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Affiliation(s)
- Nadine Pellen
- ER 7479 SPURBO, University of Western Brittany, 22, av. Camille Desmoulins, Brest, FR 29238, France.
| | - Jean-Yves Le Reste
- ER 7479 SPURBO, University of Western Brittany, 22, av. Camille Desmoulins, Brest, FR 29238, France
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Rochowski P. On the equivocal nature of the mass absorption curves. Int J Pharm 2023; 646:123452. [PMID: 37774756 DOI: 10.1016/j.ijpharm.2023.123452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/13/2023] [Accepted: 09/27/2023] [Indexed: 10/01/2023]
Abstract
The idea behind the research presented is based upon apparently contradictory experimental results obtained here by means of photoacoustics modalities for the same drug donor/acceptor membrane system, serving as a surrogate for a transdermal delivery system. The first modality allowed for the monitoring of the total amount of mass uptake (m(t)-type data), while the second technique allowed for the quantification of time-dependent concentration distribution within the acceptor membrane (c(x,t)-type data). Despite of a very good agreement between the mt data and the 1st-order uptake fitting model (standard Fickian diffusion with constant source boundary condition), the standard approach failed during the c(x,t) data analysis. The results led to the analysis of the interfacial transfer contribution to the overall mass transfer efficiency, which eventually allowed to question reliability of the mt data analysis for the determination and quantification of the mass transport parameters. A more detailed analysis of the c(x,t) by means of the newly introduced transport rate number parameter revealed, that the mass uptake by the acceptor is almost equally influenced by interfacial and bulk transport processes. The analyses performed were translated into a model-free characteristic times, i.e. parameters independent of the model scheme used.
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Affiliation(s)
- Pawel Rochowski
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland.
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