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Al-Natoor A. Norm inequalities for functions of matrices. Heliyon 2024; 10:e30056. [PMID: 38707267 PMCID: PMC11066377 DOI: 10.1016/j.heliyon.2024.e30056] [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: 11/21/2023] [Revised: 04/12/2024] [Accepted: 04/18/2024] [Indexed: 05/07/2024] Open
Abstract
In this paper, we prove several spectral norm and unitarily invariant norm inequalities for matrices in which the special cases of our results present some known inequalities. Also, some of our results give interpolating inequalities which are related to well-known recent inequalities.
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Affiliation(s)
- Ahmad Al-Natoor
- Department of Mathematics, Faculty of Sciences, Isra University, Amman 11622, Jordan
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2
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Hedreen JC, Berretta S, White III CL. Postmortem neuropathology in early Huntington disease. J Neuropathol Exp Neurol 2024; 83:294-306. [PMID: 38553027 PMCID: PMC11029463 DOI: 10.1093/jnen/nlae022] [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: 04/20/2024] Open
Abstract
Two aspects of the neuropathology of early Huntington disease (HD) are examined. Neurons of the neostriatum are counted to determine relative loss in striosomes versus matrix at early stages, including for the first time in preclinical cases. An immunohistochemical procedure is described that tentatively distinguishes early HD from HD mimic disorders in postmortem brains. Counts of striatal projection neurons (SPNs) in striosomes defined by calbindin immunohistochemistry versus counts in the surrounding matrix are reported for 8 Vonsattel grade 0 (including 5 premanifest), 8 grade 1, 2 grade 2 HD, and for 8 control postmortem brains. Mean counts of striosome and matrix SPNs were significantly lower in premanifest grade 0 versus controls, with striosome counts significantly lower than matrix. In 8 grade 1 and 2 grade 2 brains, no striosomes with higher SPN counts than in the surrounding matrix were observed. Comparing dorsal versus ventral neostriatum, SPNs in dorsal striosomes and matrix declined more than ventral, making clear the importance of the dorsoventral site of tissue selection for research studies. A characteristic pattern of expanded polyglutamine-immunopositive inclusions was seen in all HD cases. Inclusions were always present in some SPNs and some pontine nucleus neurons and were absent in Purkinje cells, which showed no obvious cell loss.
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Affiliation(s)
- John C Hedreen
- Harvard Brain Tissue Resource Center, McLean Hospital, Belmont, Massachusetts, USA
| | - Sabina Berretta
- McLean Hospital, Belmont, Massachusetts, USA
- Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, USA
- The Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Charles L White III
- Neuropathology Section, Department of Pathology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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Funk AT, Hassan AAO, Waugh JL. In humans, insulo-striate structural connectivity is largely biased toward either striosome-like or matrix-like striatal compartments. bioRxiv 2024:2024.04.07.588409. [PMID: 38645229 PMCID: PMC11030402 DOI: 10.1101/2024.04.07.588409] [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] [Indexed: 04/23/2024]
Abstract
The insula is an integral component of sensory, motor, limbic, and executive functions, and insular dysfunction is associated with numerous human neuropsychiatric disorders. Insular afferents project widely, but insulo-striate projections are especially numerous. The targets of these insulo-striate projections are organized into tissue compartments, the striosome and matrix. These striatal compartments have distinct embryologic origins, afferent and efferent connectivity, dopamine pharmacology, and susceptibility to injury. Striosome and matrix appear to occupy separate sets of cortico-striato-thalamo-cortical loops, so a bias in insulo-striate projections towards one compartment may also embed an insular subregion in distinct regulatory and functional networks. Compartment-specific mapping of insulo-striate structural connectivity is sparse; the insular subregions are largely unmapped for compartment-specific projections. In 100 healthy adults, we utilized probabilistic diffusion tractography to map and quantify structural connectivity between 19 structurally-defined insular subregions and each striatal compartment. Insulo-striate streamlines that reached striosome-like and matrix-like voxels were concentrated in distinct insular zones (striosome: rostro- and caudoventral; matrix: caudodorsal) and followed different paths to reach the striatum. Though tractography was generated independently in each hemisphere, the spatial distribution and relative bias of striosome-like and matrix-like streamlines were highly similar in the left and right insula. 16 insular subregions were significantly biased towards one compartment: seven toward striosome-like voxels and nine toward matrix-like voxels. Striosome-favoring bundles had significantly higher streamline density, especially from rostroventral insular subregions. The biases in insulo-striate structural connectivity we identified mirrored the compartment-specific biases identified in prior studies that utilized injected tract tracers, cytoarchitecture, or functional MRI. Segregating insulo-striate structural connectivity through either striosome or matrix may be an anatomic substrate for functional specialization among the insular subregions.
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Affiliation(s)
- AT Funk
- Division of Pediatric Neurology, Department of Pediatrics, University of Texas Southwestern, Dallas, TX
| | - AAO Hassan
- Department of Natural Sciences and Mathematics, University of Texas at Dallas
| | - JL Waugh
- Division of Pediatric Neurology, Department of Pediatrics, University of Texas Southwestern, Dallas, TX
- Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA
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Chen Q, Jin Y, Chen T, Zhou H, Wang X, Wu O, Chen L, Zhang Z, Guo Z, Sun J, Wu A, Qian Q. Injectable nanocomposite hydrogels with enhanced lubrication and antioxidant properties for the treatment of osteoarthritis. Mater Today Bio 2024; 25:100993. [PMID: 38440110 PMCID: PMC10909650 DOI: 10.1016/j.mtbio.2024.100993] [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: 11/19/2023] [Revised: 01/21/2024] [Accepted: 02/03/2024] [Indexed: 03/06/2024] Open
Abstract
Osteoarthritis (OA) is a chronic inflammatory joint disease characterized by progressive cartilage degeneration, synovitis, and osteoid formation. In order to effectively treat OA, it is important to block the harmful feedback caused by reactive oxygen species (ROS) produced during joint wear. To address this challenge, we have developed injectable nanocomposite hydrogels composed of polygallate-Mn (PGA-Mn) nanoparticles, oxidized sodium alginate, and gelatin. The inclusion of PGA-Mn not only enhances the mechanical strength of the biohydrogel through a Schiff base reaction with gelatin but also ensures efficient ROS scavenging ability. Importantly, the nanocomposite hydrogel exhibits excellent biocompatibility, allowing it to effectively remove ROS from chondrocytes and reduce the expression of inflammatory factors within the joint. Additionally, the hygroscopic properties of the hydrogel contribute to reduced intra-articular friction and promote the production of cartilage-related proteins, supporting cartilage synthesis. In vivo experiments involving the injection of nanocomposite hydrogels into rat knee joints with an OA model have demonstrated successful reduction of osteophyte formation and protection of cartilage from wear, highlighting the therapeutic potential of this approach for treating OA.
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Affiliation(s)
- Qizhu Chen
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Yuxin Jin
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Tao Chen
- Department of Orthopaedics, Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Tongji Hospital of Tongji University, Shanghai, 200065, China
| | - Hao Zhou
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Xinzhou Wang
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Ouqiang Wu
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Linjie Chen
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Zhiguang Zhang
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Zhengyu Guo
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Jin Sun
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Aimin Wu
- Department of Orthopaedics, Key Laboratory of Structural Malformations in Children of Zhejiang Province, Key Laboratory of Orthopaedics of Zhejiang Province, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Qiuping Qian
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang, 325000, China
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Huang X, Wang B, Zhai R, Ding CF, Fang X, Dai X, Yan Y. Boric acids decorated polymers with Au nanoparticle anchor assisted laser desorption/ionization for qualitive and quantitative analysis of hydroxytyrosol in red wines. Food Chem 2024; 437:137873. [PMID: 37918150 DOI: 10.1016/j.foodchem.2023.137873] [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: 07/05/2023] [Revised: 10/22/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
Hydroxytyrosol possesses a variety of biological and pharmacological activities that are beneficial to human health. However, the methodologies for its detection always suffered from problems. In this work, the gold nanoparticle modified polymer decorated with boric acids (pMBA/VPBA@Au) was synthesized and used both as the adsorbent and matrix to enrich and ionize small molecule substances through surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS). The pMBA/VPBA@Au displayed a low detection limit (8 × 10-6 M) and high selectivity (1:100) for the enrichment of hydroxytyrosol, and the linear correlation curve between the concentration of hydroxytyrosol and the intensity of MS had a good correlation (10-4-10-2 M, R2 = 0.997). Additionally, the pMBA/VPBA@Au was used to quantify hydroxytyrosol in red wines, and the contents were 0.053-0.094 μg/mL. In general, a simple and novel method for the detection of hydroxytyrosol by SALDI-MS using boric acid functionalized polymer was developed for the first time, showing a good practical application value.
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Affiliation(s)
- Xiaohui Huang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo 315211, China
| | - Baichun Wang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo 315211, China
| | - Rui Zhai
- Technology Innovation Center of Mass Spectrometry for State Market Regulation, Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, PR China
| | - Chuan-Fan Ding
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo 315211, China
| | - Xiang Fang
- Technology Innovation Center of Mass Spectrometry for State Market Regulation, Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, PR China
| | - Xinhua Dai
- Technology Innovation Center of Mass Spectrometry for State Market Regulation, Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, PR China.
| | - Yinghua Yan
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Institute of Mass Spectrometry, Ningbo University, Ningbo 315211, China.
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Ousset MJ, Pianciola LA, Mazzeo M, Oteiza JM, Jaureguiberry MS, Venturino A, Barril PA. Improved SARS-CoV-2 RNA recovery in wastewater matrices using a CTAB-based extraction method. J Virol Methods 2024; 327:114918. [PMID: 38556176 DOI: 10.1016/j.jviromet.2024.114918] [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: 02/01/2024] [Revised: 03/21/2024] [Accepted: 03/23/2024] [Indexed: 04/02/2024]
Abstract
Wastewater-based epidemiology has allowed tracking the magnitude and distribution of SARS-CoV-2 in communities, allowing public health officials to prepare for impending outbreaks. While many factors influence recovery of SARS-CoV-2 from wastewater, proper extraction, concentration, and purification of RNA are key steps to ensure accurate detection of viral particles. The aim of this study was to compare the efficiency of four commonly used RNA extraction methods for detection of the SARS-CoV-2 RNA genome in sewage samples artificially inoculated with the virus, in order to identify a protocol that improves viral recovery. These methods included CTAB-based, TRIzol-based, and guanidinium thiocyanate (GTC)-based extraction procedures coupled with silica spin column-based purification, and an automated extraction/purification protocol using paramagnetic particles. Following RNA extraction, virus recovery rates were compared using RT-qPCR-based detection. The CTAB-based approach yielded the highest recovery rates and was the only method to consistently demonstrate stable virus recovery percentages regardless of the specific physicochemical characteristics of the samples tested. The TRIzol method proved to be the second most effective, yielding significantly higher recovery rates compared to both the GTC-based and the automated extraction methods. These results suggest that the CTAB-based approach could be a useful tool for the recovery of viral RNA from complex wastewater matrices.
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Affiliation(s)
- María Julia Ousset
- Centro de Investigaciones en Toxicología Ambiental y Agrobiotecnología del Comahue (CITAAC), CONICET- Universidad Nacional del Comahue, Buenos Aires 1400, Neuquén 8300, Argentina.
| | - Luis Alfredo Pianciola
- Laboratorio Central "Mg. Luis Alfredo Pianciola", Ministerio de Salud de la Provincia de Neuquén, Gregorio Martinez 65, Neuquén 8300, Argentina
| | - Melina Mazzeo
- Laboratorio Central "Mg. Luis Alfredo Pianciola", Ministerio de Salud de la Provincia de Neuquén, Gregorio Martinez 65, Neuquén 8300, Argentina
| | - Juan Martín Oteiza
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; Laboratorio de Microbiología de los Alimentos, Centro de Investigación y Asistencia Técnica a la Industria (CIATI), Expedicionarios del Desierto 1310, Centenario, Neuquén 8309, Argentina
| | - María Soledad Jaureguiberry
- Centro de Investigaciones en Toxicología Ambiental y Agrobiotecnología del Comahue (CITAAC), CONICET- Universidad Nacional del Comahue, Buenos Aires 1400, Neuquén 8300, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Andrés Venturino
- Centro de Investigaciones en Toxicología Ambiental y Agrobiotecnología del Comahue (CITAAC), CONICET- Universidad Nacional del Comahue, Buenos Aires 1400, Neuquén 8300, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Patricia Angélica Barril
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; Laboratorio de Microbiología de los Alimentos, Centro de Investigación y Asistencia Técnica a la Industria (CIATI), Expedicionarios del Desierto 1310, Centenario, Neuquén 8309, Argentina
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Lu J, Xie K, Che X, Song A, Zhang M, Qi C, Lu R, Fan Y, Liu N, Huang Z, Peng Y, Fan Q, Wang N, Yao L, Gu L. The presence of exudative thickening of Bowman's capsule predict poor prognosis in diabetic kidney disease. Diabetes Res Clin Pract 2024; 209:111594. [PMID: 38403176 DOI: 10.1016/j.diabres.2024.111594] [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: 01/03/2024] [Revised: 02/10/2024] [Accepted: 02/22/2024] [Indexed: 02/27/2024]
Abstract
BACKGROUND The relationship between Bowman's capsule thickening and progression of diabetic kidney disease (DKD) remains uncertain. METHODS Renal biopsy specimens from 145 DKD patients and 20 control subjects were evaluated for Bowman's capsule thickness. Immunohistochemical staining assessed col4α2, laminin β1, and albumin expression. In a discovery cohort of 111 DKD patients with eGFR ≥ 30 ml/min/1.73 m2, thickening was classified as fibrotic or exudative. The composite endpoint included CKD stage 5, dialysis initiation, and renal disease-related death. Prognosis was analyzed using Kaplan-Meier and Cox regression analyses. Two validation cohorts were included. RESULTS Three types of thickening were observed: fibrotic, exudative, and periglomerular fibrosis. Parietal epithelial cell matrix protein accumulation contributed to fibrotic thickening, while albumin was present in exudative thickening. Bowman's capsule was significantly thicker in DKD patients (5.74 ± 2.09 μm) compared to controls (3.38 ± 0.43 μm, P < 0.01). In discovery cohort, the group of exudative thickning had a poorer prognosis(median time 20 months vs 57 months, P = 0.000). Cox multivariate analysis revealed that exudative thickening of Bowman's capsule were associated with a poor prognosis. The validation cohorts confirmed the result. CONCLUSIONS Various mechanisms contribute to Bowman's capsule thickening in DKD. The proportion of exudative thickening may serve as a valuable prognostic indicator for DKD patients.
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Affiliation(s)
- Jiayue Lu
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China
| | - Kewei Xie
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China
| | - Xiajing Che
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China
| | - Ahui Song
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China
| | - Minfang Zhang
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China
| | - Chaojun Qi
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China
| | - Renhua Lu
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China
| | - Ying Fan
- Department of Nephrology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, School of Medicine, China
| | - Nan Liu
- Department of Nephrology, The First Affiliated Hospital of China Medical University, China
| | - Zhaohui Huang
- Department of Nephrology, The First Affiliated Hospital of China Medical University, China
| | - Yali Peng
- Department of Nephrology, The First Affiliated Hospital of China Medical University, China
| | - Qiuling Fan
- Department of Nephrology, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, China.
| | - Niansong Wang
- Department of Nephrology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, School of Medicine, China.
| | - Li Yao
- Department of Nephrology, The First Affiliated Hospital of China Medical University, China.
| | - Leyi Gu
- Department of Nephrology, Molecular Cell Lab for Kidney Disease, Shanghai Peritoneal Dialysis Research Center, Renji Hospital, Uremia Diagnosis and Treatment Center, Shanghai Jiaotong University, School of Medicine, China.
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Chapla R, Katz RR, West JL. Neurogenic Cell Behavior in 3D Culture Enhanced Within a Highly Compliant Synthetic Hydrogel Platform Formed via Competitive Crosslinking. Cell Mol Bioeng 2024; 17:35-48. [PMID: 38435792 PMCID: PMC10901766 DOI: 10.1007/s12195-024-00794-2] [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: 08/09/2023] [Accepted: 01/09/2024] [Indexed: 03/05/2024] Open
Abstract
Purpose Scaffold materials that better support neurogenesis are still needed to improve cell therapy outcomes for neural tissue damage. We have used a modularly tunable, highly compliant, degradable hydrogel to explore the impacts of hydrogel compliance stiffness on neural differentiation. Here we implemented competitive matrix crosslinking mechanics to finely tune synthetic hydrogel moduli within soft tissue stiffnesses, a range much softer than typically achievable in synthetic crosslinked hydrogels, providing a modularly controlled and ultrasoft 3D culture model which supports and enhances neurogenic cell behavior. Methods Soluble competitive allyl monomers were mixed with proteolytically-degradable poly(ethylene glycol) diacrylate derivatives and crosslinked to form a matrix, and resultant hydrogel stiffness and diffusive properties were evaluated. Neural PC12 cells or primary rat fetal neural stem cells (NSCs) were encapsulated within the hydrogels, and cell morphology and phenotype were investigated to understand cell-matrix interactions and the effects of environmental stiffness on neural cell behavior within this model. Results Addition of allyl monomers caused a concentration-dependent decrease in hydrogel compressive modulus from 4.40 kPa to 0.26 kPa (natural neural tissue stiffness) without influencing soluble protein diffusion kinetics through the gel matrix. PC12 cells encapsulated in the softest hydrogels showed significantly enhanced neurite extension in comparison to PC12s in all other hydrogel stiffnesses tested. Encapsulated neural stem cells demonstrated significantly greater spreading and elongation in 0.26 kPa alloc hydrogels than in 4.4 kPa hydrogels. When soluble growth factor deprivation (for promotion of neural differentiation) was evaluated within the neural stiffness gels (0.26 kPa), NSCs showed increased neuronal marker expression, indicating early enhancement of neurogenic differentiation. Conclusions Implementing allyl-acrylate crosslinking competition reduced synthetic hydrogel stiffness to provide a supportive environment for 3D neural tissue culture, resulting in enhanced neurogenic behavior of encapsulated cells. These results indicate the potential suitability of this ultrasoft hydrogel system as a model platform for further investigating environmental factors on neural cell behavior. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-024-00794-2.
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Affiliation(s)
- Rachel Chapla
- Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA
| | - Rachel R. Katz
- Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA
| | - Jennifer L. West
- Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22904 USA
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Liu H, Xie T, Wang J, Wang X, Han J, Huang Z, Jiang L, Nie Z. In situ analysis of metabolic changes under hypoxic-ischemic encephalopathy via MALDI mass spectrometry imaging. Talanta 2024; 268:125306. [PMID: 37839325 DOI: 10.1016/j.talanta.2023.125306] [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: 06/01/2023] [Revised: 09/28/2023] [Accepted: 10/11/2023] [Indexed: 10/17/2023]
Abstract
Hypoxic-ischemic encephalopathy (HIE) is a leading cause of neurological disability and even more serious fetal or neonatal asphyxia death. As the therapeutic time window is limited and timely intervention could have a better prognosis, elucidating the mechanisms underlying HIE and developing novel therapeutic strategies is of great importance. In the present study, 1, 5-Diaminonaphthalene hydrochloride (1, 5-DANHCl) assisted laser desorption/ionization mass spectrometry imaging (MALDI MSI) was applied to the neonatal rat model of HIE to investigate metabolic changes during hypoxic-ischemic period. Seventy-three metabolites involved in various metabolic pathways such as glycolysis, tricarboxylic acid (TCA) cycle, nucleoside metabolism, lipid metabolism, oxidative stress and ionic homeostasis demonstrated significant changes. It is worth mentioning that we have detected neutral triglycerides (TGs) that are difficult to ionize and observed their accumulation in the ischemic region, which has been rarely reported in previous studies. The results not only help us discover biomarkers but also provide new insights into its mechanism for us to understand the pathological and physiological processes of the disease.
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Affiliation(s)
- Huihui Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ting Xie
- Gannan Medical University, Ganzhou, Jiangxi Province, 341000, China; Gannna Innovation and Translational Medicine Research Institute, Ganzhou, Jiangxi Province, 341000, China
| | - Jiyun Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Han
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zhihua Huang
- Ganzhou Key Laboratory of Neuroinflammation Research, Gannan Medical University, Ganzhou, 341000, China; Gannan Medical University, Ganzhou, Jiangxi Province, 341000, China.
| | - Lixia Jiang
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi Province, 341000, China; Ganzhou Key Laboratory of Neuroinflammation Research, Gannan Medical University, Ganzhou, 341000, China.
| | - Zongxiu Nie
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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Che X, Liu P, Ding Y, Tao W, Zheng X, Di B, Qiao H. In-sample stability and postsampling analysis of 21 illicit drugs, their metabolites and cotinine in wastewater. Ecotoxicol Environ Saf 2024; 270:115900. [PMID: 38176186 DOI: 10.1016/j.ecoenv.2023.115900] [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: 08/24/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 01/06/2024]
Abstract
A thorough understanding of the degradation of chemical biomarkers in wastewater after the sampling is critical in the surveillance of illicit drug use based on the back-calculation technique. Herein, three temperatures, eight groups of matrices, and acidification were applied to simulate the preservation condition of 21 illicit drugs, their metabolites, and cotinine for a 240-day stability study. It was proved that the temperature, matrices, and acidification play vital roles in their stability in wastewater. Most of them demonstrated high stability (transformation rates < 20%) during room temperature for 45 days, and the transformation rates decreased while the storage temperature reduced. The stability of the target compounds such as cocaine (COC), 6-monoacetylmorphine (6-MAM), and amphetamine (AM) is influenced by matrices. Acidification prevented the majority of analytes from transforming, making it a feasible solution for preservation after sampling. A model that combined the effects of temperature and matrix was developed to back-calculate the concentration of target compounds during the postsampling process. The feasibility of this model was validated by correcting the loss of COC and 6-MAM from 24.2% and 16.2% to 2.98% and 2.77%. This study simulated a typical large-scale sampling and storage scenario. The effect of the temperature, pH, and matrix on in-sample stability and the postsampling analysis of selected target compounds was investigated for the first time in this study.
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Affiliation(s)
- Xinfeng Che
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China; Office of China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, Beijing 100193, PR China
| | - Peipei Liu
- Office of China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, Beijing 100193, PR China; Key Laboratory of Drug Monitoring and Control, Drug Intelligence and Forensic Center, Ministry of Public Security, Beijing 100193, PR China
| | - Yan Ding
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China; Office of China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, Beijing 100193, PR China
| | - Wenjia Tao
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China; Office of China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, Beijing 100193, PR China
| | - Xiaoyu Zheng
- Office of China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, Beijing 100193, PR China; Key Laboratory of Drug Monitoring and Control, Drug Intelligence and Forensic Center, Ministry of Public Security, Beijing 100193, PR China
| | - Bin Di
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, PR China; Office of China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, Beijing 100193, PR China.
| | - Hongwei Qiao
- Office of China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, Beijing 100193, PR China; Key Laboratory of Drug Monitoring and Control, Drug Intelligence and Forensic Center, Ministry of Public Security, Beijing 100193, PR China.
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11
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Pompeu J, Assis TO, Ometto JP. Landscape changes in the Cerrado: Challenges of land clearing, fragmentation and land tenure for biological conservation. Sci Total Environ 2024; 906:167581. [PMID: 37813262 DOI: 10.1016/j.scitotenv.2023.167581] [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: 05/30/2023] [Revised: 10/02/2023] [Accepted: 10/02/2023] [Indexed: 10/11/2023]
Abstract
Land clearing, low levels of protection, and high biodiversity make the Brazilian Cerrado a hotspot for biological conservation. However, one of the most active agricultural frontiers in Brazil is located in this region. We thus aimed to evaluate the current trends of deforestation and fragmentation of the Cerrado, from 1986 to 2019; and the contribution of land tenure and farm size to the Cerrado conservation. We divided the Cerrado (∼2 Mkm2) into three sub-regions and calculated the distribution and size of the fragments; core areas and edge distance; isolation and importance of the smallest fragments for reducing isolation; and connectivity for the years 1986, 1997, 2008, and 2019. We then evaluated vegetation cover and landscape metrics for public lands and private farms. Since 1986, 22 % of the Cerrado's remnant vegetation was cleared and the number of fragments increased by 20 %. Currently, 10 % of the Cerrado vegetation is under the effect of a 30 m edge. Isolation increased in all the sub-regions and smaller fragments (>100 ha) are important for landscape configuration. 10.82 % of the vegetation is preserved in public lands and 57.9 % in private farms, where 377,901.5 km2 could be legally cleared. Compared to other Brazilian regions, the northern Cerrado is relatively well connected and less fragmented but land clearing still threatens biodiversity. Public lands are important for connectivity and habitat amount but play a minor role when compared to private lands. Our results highlight that avoiding further land clearing of the Cerrado is a challenge that requires the engagement of different stakeholders at different levels.
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Affiliation(s)
- João Pompeu
- National Institute for Space Research, Avenida dos Astronautas, 1758 São José dos Campos, Brazil.
| | - Tainá Oliveira Assis
- National Institute for Space Research, Avenida dos Astronautas, 1758 São José dos Campos, Brazil
| | - Jean Pierre Ometto
- National Institute for Space Research, Avenida dos Astronautas, 1758 São José dos Campos, Brazil
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12
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Mar D, Babenko IM, Zhang R, Noble WS, Denisenko O, Vaisar T, Bomsztyk K. A High-Throughput PIXUL- Matrix-Based Toolbox to Profile Frozen and Formalin-Fixed Paraffin-Embedded Tissues Multiomes. J Transl Med 2024; 104:100282. [PMID: 37924947 PMCID: PMC10872585 DOI: 10.1016/j.labinv.2023.100282] [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: 08/29/2023] [Revised: 10/23/2023] [Accepted: 10/27/2023] [Indexed: 11/06/2023] Open
Abstract
Large-scale high-dimensional multiomics studies are essential to unravel molecular complexity in health and disease. We developed an integrated system for tissue sampling (CryoGrid), analytes preparation (PIXUL), and downstream multiomic analysis in a 96-well plate format (Matrix), MultiomicsTracks96, which we used to interrogate matched frozen and formalin-fixed paraffin-embedded (FFPE) mouse organs. Using this system, we generated 8-dimensional omics data sets encompassing 4 molecular layers of intracellular organization: epigenome (H3K27Ac, H3K4m3, RNA polymerase II, and 5mC levels), transcriptome (messenger RNA levels), epitranscriptome (m6A levels), and proteome (protein levels) in brain, heart, kidney, and liver. There was a high correlation between data from matched frozen and FFPE organs. The Segway genome segmentation algorithm applied to epigenomic profiles confirmed known organ-specific superenhancers in both FFPE and frozen samples. Linear regression analysis showed that proteomic profiles, known to be poorly correlated with transcriptomic data, can be more accurately predicted by the full suite of multiomics data, compared with using epigenomic, transcriptomic, or epitranscriptomic measurements individually.
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Affiliation(s)
- Daniel Mar
- UW Medicine South Lake Union, University of Washington, Seattle, Washington; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
| | - Ilona M Babenko
- Diabetes Institute, University of Washington, Seattle, Washington
| | - Ran Zhang
- Department of Genome Sciences, University of Washington, Seattle, Washington
| | - William Stafford Noble
- Department of Genome Sciences, University of Washington, Seattle, Washington; Paul G. Allen School of Computer Science and Engineering, University of Washington, Seattle, Washington
| | - Oleg Denisenko
- UW Medicine South Lake Union, University of Washington, Seattle, Washington
| | - Tomas Vaisar
- Diabetes Institute, University of Washington, Seattle, Washington
| | - Karol Bomsztyk
- UW Medicine South Lake Union, University of Washington, Seattle, Washington; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington; Matchstick Technologies, Inc, Kirkland, Washington.
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Nordlee JA, Baumert JL, Taylor SL. Preparation of Blinded Food Matrixes for Clinical Oral Challenges. Methods Mol Biol 2024; 2717:143-157. [PMID: 37737982 DOI: 10.1007/978-1-0716-3453-0_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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Clinically, oral food challenges have value in the diagnosis and management of food allergy. Oral food challenges are used not only for diagnostic confirmation that ingestion of a specific food elicits an adverse reaction, but also for determining individual threshold doses, tracking the progress toward desensitization during immunotherapy, determining the effect of processing on the allergenicity of a specific food, assessing the allergenicity of an ingredient derived from an allergenic source, and tracking the progress toward development of age-related tolerance to a specific food. To eliminate bias in oral challenges, the food under investigation is masked in a matrix so that it is not sensorially detectable by the patient or the clinical observer. The preparation of oral challenge foods requires care in the selection of the allergenic components, the selection of the components of the matrix, the masking of the allergenic component, and the homogeneity of the allergen in the overall matrix.
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Affiliation(s)
- Julie A Nordlee
- Food Allergy Research & Resource Program, Department of Food Science & Technology, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Joe L Baumert
- Food Allergy Research & Resource Program, Department of Food Science & Technology, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Steve L Taylor
- Food Allergy Research & Resource Program, Department of Food Science & Technology, University of Nebraska-Lincoln, Lincoln, NE, USA.
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Yang E, Kim JH, Tressler CM, Shen XE, Brown DR, Johnson CC, Hahm TH, Barman I, Glunde K. RaMALDI: Enabling simultaneous Raman and MALDI imaging of the same tissue section. Biosens Bioelectron 2023; 239:115597. [PMID: 37597501 PMCID: PMC10544780 DOI: 10.1016/j.bios.2023.115597] [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: 06/05/2023] [Revised: 08/02/2023] [Accepted: 08/11/2023] [Indexed: 08/21/2023]
Abstract
Multimodal tissue imaging techniques that integrate two complementary modalities are powerful discovery tools for unraveling biological processes and identifying biomarkers of disease. Combining Raman spectroscopic imaging (RSI) and matrix-assisted laser-desorption/ionization (MALDI) mass spectrometry imaging (MSI) to obtain fused images with the advantages of both modalities has the potential of providing spatially resolved, sensitive, specific biomolecular information, but has so far involved two separate sample preparations, or even consecutive tissue sections for RSI and MALDI MSI, resulting in images with inherent disparities. We have developed RaMALDI, a streamlined, integrated, multimodal imaging workflow of RSI and MALDI MSI, performed on a single tissue section with one sample preparation protocol. We show that RaMALDI imaging of various tissues effectively integrates molecular information acquired from both RSI and MALDI MSI of the same sample, which will drive discoveries in cell biology, biomedicine, and pathology, and advance tissue diagnostics.
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Affiliation(s)
- Ethan Yang
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Jeong Hee Kim
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Caitlin M Tressler
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Xinyi Elaine Shen
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Dalton R Brown
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Cole C Johnson
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Tae-Hun Hahm
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Ishan Barman
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA; Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA.
| | - Kristine Glunde
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA; Departments of Oncology and Biological Chemistry, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA.
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15
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Boulet M, Stott A, Kneebone S. Which behaviours matter? Prioritising food waste reduction behaviours for targeted policy and program approaches. J Environ Manage 2023; 345:118668. [PMID: 37515884 DOI: 10.1016/j.jenvman.2023.118668] [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: 05/17/2023] [Revised: 07/16/2023] [Accepted: 07/22/2023] [Indexed: 07/31/2023]
Abstract
More than half of the waste in the global food system's consumption stage comes from households, which therefore represent a critical entry point to tackle this challenge with its combined social, economic, and environmental impacts. Yet there is a tension for policy makers between promoting food waste reduction behaviours to householders and overloading them with too many options that make them less likely to engage. This study utilises an Impact-Likelihood methodology to identify the range of behaviours associated with household food waste reduction and to group them according to their impact and likelihood of adoption, as well as their current adoption rates. Scores for these measures were generated using data from an expert elicitation survey of food waste policy makers and practitioners, as well as a large-scale householder survey. The Impact-Likelihood matrix for household food waste reduction behaviours generated in this study identifies potential priority behaviours that are both impactful in tackling the substantive challenge of food waste and have a high likelihood of uptake by householders. As such, the matrix provides strategic research and decision support for policy makers in prioritising specific behaviours for more targeted engagement with householders in different geographical or jurisdictional contexts.
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Affiliation(s)
- Mark Boulet
- BehaviourWorks Australia, Monash Sustainable Development Institute, Monash University, 8 Scenic Boulevard, Clayton, VIC, 3800, Australia.
| | - Annika Stott
- OzHarvest, PO Box 7257, Alexandria, NSW, 2015, Australia.
| | - Sarah Kneebone
- BehaviourWorks Australia, Monash Sustainable Development Institute, Monash University, 8 Scenic Boulevard, Clayton, VIC, 3800, Australia.
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Falcone MO, Asmar G, Chassat R. Subungual Glomus Tumor. Hand Surg Rehabil 2023:S2468-1229(23)00564-9. [PMID: 37866479 DOI: 10.1016/j.hansur.2023.10.001] [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: 09/21/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/24/2023]
Abstract
Subungual glomus tumors arise from the glomus body of the digits. They are rare and benign and often in a single location. Their diagnosis relies on the typical clinical triad of symptoms and on imaging findings, mainly magnetic resonance imaging with gadolinium injection. Subungual tumors treatment is complete resection, essential for cure. The different surgical techniques aim to: a painless digit with normal range of motion and sensitivity, without nail deformity after tumour resection, and to recurrence prevention. They vary according to tumor location. Classic surgical approaches are: the nail unit sparing ones (para-ungual, lateral subperiosteal, periungual), and the nail unit non-sparing ones (all transungual approaches with nail bed splitting). In this paper, we review the literature for the different approaches describing the advantages and drawbacks of each of them. We also describe the author's preferred subperiosteal "shark mouth" flap containing the nail plate and the nail bed as a single unit. It can be performed whether the tumor is located centrally, peripherally, or under the germinal matrix with very satisfactory outcomes.
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Affiliation(s)
- Marc-Olivier Falcone
- Clinique Jouvenet, Capio - Ramsay Santé, 6 Square Jouvenet, 75016 Paris, France; Hôpital Privé Paul d'Egine, Capio - Ramsay Santé, 4 Avenue Marx Dormoy, 94500 Champigny sur Marne, France.
| | - Ghada Asmar
- Hôpital Privé Paul d'Egine, Capio - Ramsay Santé, 4 Avenue Marx Dormoy, 94500 Champigny sur Marne, France
| | - Romain Chassat
- Hôpital Privé de l'Ouest Parisien, Capio - Ramsay Santé, 14 Rue Castiglione Del Lago, 78190 Trappes, France
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17
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Lu Y, Li G, Li Y, Yao Y. Cellulose nanofibril matrix drives the dynamic formation of spheroids. J Zhejiang Univ Sci B 2023; 24:922-934. [PMID: 37752093 PMCID: PMC10522563 DOI: 10.1631/jzus.b23d0003] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 05/08/2023] [Indexed: 09/28/2023]
Abstract
Multicellular spheroids, which mimic the natural organ counterparts, allow the prospect of drug screening and regenerative medicine. However, their application is hampered by low processing efficiency or limited scale. This study introduces an efficient method to drive rapid multicellular spheroid formation by a cellulose nanofibril matrix. This matrix enables the facilitated growth of spheroids (within 48 h) through multiple cell assembly into size-controllable aggregates with well-organized physiological microstructure. The efficiency, dimension, and conformation of the as-formed spheroids depend on the concentration of extracellular nanofibrils, the number of assembled cells, and the heterogeneity of cell types. The above strategy allows the robust formation mechanism of compacted tumoroids and hepatocyte spheroids.
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Affiliation(s)
- Yi Lu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Guo Li
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
| | - Yeqiu Li
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
| | - Yuan Yao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China.
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
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18
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Cormican MT, Creel NJ, Bosque BA, Dowling SG, Rideout PP, Vassy WM. Ovine Forestomach Matrix in the Surgical Management of Complex Volumetric Soft Tissue Defects: A Retrospective Pilot Case Series. Eplasty 2023; 23:e66. [PMID: 38045101 PMCID: PMC10690777] [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] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Background Volumetric soft tissue loss is an urgent surgical issue and can frequently lead to suboptimal outcomes for patients due to significant soft tissue loss, compromised vital structures, and contamination. Ovine forestomach matrix (OFM) has demonstrated clinical success in the surgical management of soft tissue defects, especially in contaminated fields, and provides an effective option for immediate coverage of exposed vital structures before definitive closure. Methods This retrospective pilot case series (n = 13 defects) evaluated the clinical effectiveness of OFM (graft and/or particulate formats) in the surgical management of contaminated volumetric soft tissue defects. Patients presented with significant soft tissue loss, often with exposed viscera, tendon, bone, or muscle, and were treated with OFM as part of their inpatient surgical management. All patients had at least 1 significant comorbidity with the potential to complicate their healing trajectory. The primary study endpoint was time to 100% granulation tissue coverage (days), and the secondary endpoint was any device-related postoperative complications. Results A total of 13 volumetric soft tissue defects were evaluated in 10 patients who underwent surgical reconstruction. Mean defect age was 3.5 ± 5.6 weeks, and mean area was 217.3 ± 77.9 cm2. Most defects had exposed structures (85%), and all defects were Centers for Disease Control and Prevention grade 2 or higher. Mean time to 100% granulation tissue formation was 23.4 ± 9.2 days, with a median product application of 1.0. Staged reconstruction was used in 7 of 13 defects, with the remainder (6 of 13) left to heal via secondary intention using standard wound care protocols. There were no major postoperative infections or adverse events (mean follow-up, 7.4 ± 2.4 weeks.). Conclusions This retrospective pilot case series builds on a growing body of evidence that OFM can be utilized to facilitate the formation of functional, well-vascularized soft tissue in large contaminated volumetric soft tissue defects.
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Affiliation(s)
- Michael T Cormican
- Northeast Georgia Medical Center, Department of Trauma and Acute Care Surgery, Gainesville, Georgia
| | - Nathan J Creel
- Northeast Georgia Medical Center, Department of Trauma and Acute Care Surgery, Gainesville, Georgia
| | | | | | - Phillip P Rideout
- Northeast Georgia Medical Center, Northeast Georgia Physicians Group Vascular Center, Gainesville, Georgia
| | - William M Vassy
- Northeast Georgia Medical Center, Department of Trauma and Acute Care Surgery, Gainesville, Georgia
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Schwartz C, Comet M, Lallemand B, Vince M, Ott AK, Schnell F, Bonnet B, Spitzer D. Nitroglycerin trapping in melamine matrices. Heliyon 2023; 9:e20306. [PMID: 37809411 PMCID: PMC10560045 DOI: 10.1016/j.heliyon.2023.e20306] [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: 06/08/2023] [Revised: 09/18/2023] [Accepted: 09/18/2023] [Indexed: 10/10/2023] Open
Abstract
Melamine (Mel) was used as host matrix for liquid nitroglycerin (NG), to prepare Mel/NG solid powdered compounds containing up to 45 wt% of this explosive. The two preparation processes used for this purpose consisted in evaporating a solution of both components, either in ambient conditions or under reduced pressure by the Spray Flash-Evaporation (SFE) process. In Mel/NG materials, amorphous nitroglycerin is distributed in the crystallized melamine matrix as inclusions, which were found to be smaller in size in the material prepared by the SFE process. Mel/NG materials are not stable over time: they gradually lose the nitroglycerin they contain by evaporation.
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Affiliation(s)
- Cédric Schwartz
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
| | - Marc Comet
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
| | - Bastien Lallemand
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
| | - Maxence Vince
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
| | - Anna K. Ott
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
| | - Fabien Schnell
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
| | - Benjamin Bonnet
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
| | - Denis Spitzer
- NS3E Laboratory – UMR 3208 (ISL-CNRS-UNISTRA), French-German Research Institute of Saint-Louis, BP 70034, 68301 Saint Louis Cedex, France
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20
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Portelli D, Ciodaro F, Loteta S, Alberti G, Bruno R. Audiological assessment with Matrix sentence test of percutaneous vs transcutaneous bone-anchored hearing aids: a pilot study. Eur Arch Otorhinolaryngol 2023; 280:4065-4072. [PMID: 36933021 DOI: 10.1007/s00405-023-07918-w] [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: 01/15/2023] [Accepted: 03/06/2023] [Indexed: 03/19/2023]
Abstract
PURPOSE The study evaluated if there were differences between two types of bone-anchored hearing aids (BAHA), percutaneous vs transcutaneous implants in terms of audiological and psychosocial outcomes. METHODS Eleven patients were enrolled. Inclusion criteria were: patients with conductive or mixed hearing loss in the implanted ear with a bone conduction pure-tone average (BC PTA) of the hearing threshold at 500, 1000, 2000, and 3000 Hz ≤ 55 dB HL, aged > 5 years. Patients were assigned to two groups: percutaneous implant (BAHA Connect) and transcutaneous implant (BAHA Attract). Pure-tone audiometry, speech audiometry, free-field pure-tone and speech audiometry with the hearing aid, and Matrix sentence test were performed. The Satisfaction with Amplification in Daily Life (SADL) questionnaire, the Abbreviated Profile of Hearing Aid Benefit (APHAB) questionnaire, and the Glasgow Benefit Inventory (GBI) were used to assess the psychosocial and audiological benefits provided by the implant, and the variation in the quality of life after the surgery. RESULTS No differences were found comparing the data of Matrix SRT. APHAB and GBI questionnaires did not show a statistically significant difference comparing each subscale and the global score. The comparison of scores obtained from the SADL questionnaire demonstrated a difference in the "Personal Image" subscale with a better score for the transcutaneous implant. Furthermore, the Global Score of the SADL questionnaire was statistically different between groups. Other subscales did not show any significant difference. A Spearman's ρ correlation test was used to evaluate if the age could influence the SRT results; no correlation was found between age and SRT. Furthermore, the same test was used to confirm a negative correlation between SRT and the global benefit of the APHAB questionnaire. CONCLUSION The current research confirms the absence of statistically significant differences comparing percutaneous and transcutaneous implants. The Matrix sentence test has shown the comparability of the two implants in the speech-in-noise intelligibility. Actually, the choice of the implant type can be done according to the patient's personal needs, the surgeon's experience, and the patient anatomy.
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Affiliation(s)
- Daniele Portelli
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico "G. Martino", University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy.
| | - Francesco Ciodaro
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico "G. Martino", University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Sabrina Loteta
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico "G. Martino", University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Giuseppe Alberti
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico "G. Martino", University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Rocco Bruno
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico "G. Martino", University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
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R KB, S SC, N SS. "Sharing the matrix" - a cooperative strategy for survival in Salmonella enterica serovar Typhimurium. BMC Microbiol 2023; 23:230. [PMID: 37612630 PMCID: PMC10463773 DOI: 10.1186/s12866-023-02972-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 08/08/2023] [Indexed: 08/25/2023] Open
Abstract
BACKGROUND Bacteria in nature live together in communities called biofilms, where they produce a matrix that protects them from hostile environments. The components of this matrix vary among species, with Salmonella enterica serovar Typhimurium (STm- WT) primarily producing curli and cellulose, which are regulated by the master regulator csgD. Interactions between bacteria can be competitive or cooperative, with cooperation more commonly observed among the kin population. This study refers to STm- WT as the generalist which produces all the matrix components and knockout strains that are defective in either curli or cellulose as the specialists, which produces one of the matrix components but not both. We have asked whether two different specialists will cooperate and share matrix components during biofilm formation to match the ability of the generalist which produces both components. RESULTS In this study, the response of the specialists and generalist to physical, chemical, and biological stress during biofilm formation is also studied to assess their abilities to cooperate and produce biofilms like the generalist. STm WT colony biofilm which produces both the major biofilm matrix component were protected from stress whereas the non-matrix producer (∆csgD), the cellulose, and curli alone producers ∆csgA, ∆bcsA respectively were affected. During the exposure to various stresses, the majority of killing occurred in ∆csgD. Whereas the co-culture (∆csgA: ∆bcsA) was able to resist stress like that of the STm WT. Phenotypic and morphological characteristics of the colonies were typed using congo red assay and the Influence of matrix on the architecture of biofilms was confirmed by scanning electron microscopy. CONCLUSION Our results show that matrix aids in survival during antibiotic, chlorine, and predatory stress. And possible sharing of the matrix is occurring in co-culture, with one counterbalancing the inability of the other when confronted with stress.
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Affiliation(s)
- Kavi Bharathi R
- Biofilm Biology Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, India
| | - Srinandan C S
- Biofilm Biology Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, India
| | - Sai Subramanian N
- Biofilm Biology Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, India.
- Antimicrobial Resistance Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to Be University, Tamil Nadu, Thanjavur, Tamil Nadu, 613401, India.
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22
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Sukmana BI, Margiana R, Almajidi YQ, Almalki SG, Hjazi A, Shahab S, Romero-Parra RM, Alazbjee AAA, Alkhayyat A, John V. Supporting wound healing by mesenchymal stem cells (MSCs) therapy in combination with scaffold, hydrogel, and matrix; State of the art. Pathol Res Pract 2023; 248:154575. [PMID: 37285734 DOI: 10.1016/j.prp.2023.154575] [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: 04/27/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/09/2023]
Abstract
Non-healing wounds impose a huge annual cost on the survival of different countries and large populations in the world. Wound healing is a complex and multi-step process, the speed and quality of which can be changed by various factors. To promote wound healing, compounds such as platelet-rich plasma, growth factors, platelet lysate, scaffolds, matrix, hydrogel, and cell therapy, in particular, with mesenchymal stem cells (MSCs) are suggested. Nowadays, the use of MSCs has attracted a lot of attention. These cells can induce their effect by direct effect and secretion of exosomes. On the other hand, scaffolds, matrix, and hydrogels provide suitable conditions for wound healing and the growth, proliferation, differentiation, and secretion of cells. In addition to generating suitable conditions for wound healing, the combination of biomaterials and MSCs increases the function of these cells at the site of injury by favoring their survival, proliferation, differentiation, and paracrine activity. In addition, other compounds such as glycol, sodium alginate/collagen hydrogel, chitosan, peptide, timolol, and poly(vinyl) alcohol can be used along with these treatments to increase the effectiveness of treatments in wound healing. In this review article, we take a glimpse into the merging scaffolds, hydrogels, and matrix application with MSCs therapy to favor wound healing.
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Affiliation(s)
- Bayu Indra Sukmana
- Oral Biology Department, Lambung Mangkurat University, Banjarmasin, Indonesia
| | - Ria Margiana
- Department of Anatomy, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Master's Programme Biomedical Sciences, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Dr. Soetomo General Academic Hospital, Surabaya, Indonesia.
| | - Yasir Qasim Almajidi
- Department of Pharmacy (Pharmaceutics), Baghdad College of Medical Sciences, Baghdad, Iraq
| | - Sami G Almalki
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia
| | - Ahmed Hjazi
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Sana Shahab
- Department of Business Administration, College of Business Administration, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | | | | | - Afa Alkhayyat
- College of Pharmacy, the Islamic University, 54001 Najaf, Iraq
| | - Vivek John
- Uttaranchal Institute of Technology, Uttaranchal University, Dehradun 248007, India
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23
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Chen K, Zhang Z, Jiang J, Wang J, Wang J, Sun Y, Xu X, Guo C. Prediction of condylar movement envelope surface based on facial morphology. Heliyon 2023; 9:e17769. [PMID: 37483714 PMCID: PMC10362184 DOI: 10.1016/j.heliyon.2023.e17769] [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: 04/13/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/25/2023] Open
Abstract
The present study aimed to predict the envelope surfaces from facial morphology. Condylar envelope surfaces for 34 healthy adults were formed and simplified as sagittal section curves. Cephalometric and maximum mandibular moving distances measurement were performed on the participants. There was no statistically significant difference (p = 0.763) between the left and right maximum lateral movements. There was a statistically significant difference in the mandibular body length between the sexes. The envelope surfaces were divided into type 1 with Hp2 ≥ 1/3 Hp1 and type 2 with Hp2 < 1/3 × Hp1. SNA and SNB for type 2 were significantly greater than those for type 1 (p < 0.001). Therefore, the participants were divided into four groups based on gender and envelope surface morphology. The curves could be fitted using the second-order Fourier function (R-square ≥0.95). Six facial parameters were selected and a matrix was used to map facial morphology to the envelope surface. Individual sagittal curves were predicted using the matrix and facial parameters, and the envelope surface was predicted using the curve and the condyle model. Deviation analysis for the predicted envelope surface using the actual envelope as a reference was carried out (root mean square = 0.9970 mm ± 0.2918 mm). This method may lay a foundation for the geometric design of artificial fossa components of temporomandibular joint replacement systems. It may improve prosthesis design without flexible tissue repair and guide the movement of the artificial joint head.
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Affiliation(s)
- Kenan Chen
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Zhehao Zhang
- State Key Laboratory of Tribology, Tsinghua University, Beijing, 100084, PR China
| | - Junqi Jiang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Junlin Wang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Jing Wang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Yuchun Sun
- Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory for Dental Materials, Beijing, PR China
| | - Xiangliang Xu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Chuanbin Guo
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, NMPA Key Laboratory for Dental Materials, Beijing, PR China
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Thomson EE, Beltman ME, McAloon CG, Duane MM, Brennan JPN, Kelly ET. Determining the clinical utility of a single pre-breeding examination for predicting subsequent reproductive performance in seasonal pasture-based dairy heifers. Theriogenology 2023; 207:11-18. [PMID: 37247486 DOI: 10.1016/j.theriogenology.2023.05.015] [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: 10/19/2022] [Revised: 05/15/2023] [Accepted: 05/15/2023] [Indexed: 05/31/2023]
Abstract
Heifers that conceive early in the breeding season are key to the maintenance of a compact calving pattern in seasonal dairy herds. The purpose of this prospective observational study was to determine whether a single pre-breeding examination is useful in predicting future reproductive and calving performance in dairy heifers. This evaluation was based on a matrix of easily measurable variables which could be applied to seasonal, pasture-based dairy heifers. The matrix variables were; body weight (≥55% mature body weight at mating start date), body condition score (≥3.5), and the presence of a corpus luteum. Seasonal, pasture-based dairy heifers (n = 572) on six commercial dairy farms were examined at an average of 28 days prior to the breeding season. At this examination, they were classified as READY (meeting all three of the above criteria), INTERMEDIATE (meeting one or two of the above criteria) or PROBLEM (meeting none of the above criteria) based on the matrix and then exposed to a routine artificial insemination (AI) breeding period followed by bull breeding depending on individual farm management. Subsequent pregnancy status was determined by transrectal ultrasonography initially at 30-60 days in calf (DIC), and confirmed at over 60 DIC. After the breeding season, 519 (96%) of heifers were determined to be pregnant, of which 345 (64%) became pregnant within the first three weeks of the breeding season. Farmers collected calving data; including calving difficulty score, from the heifers the following spring. A logistic regression model was used to analyse the association between the matrix categories and the following outcomes: reproductive (21 day submission rate, 1st AI conception rate, 3 wk and 6 wk in calf rate) and calving (assistance and dystocia). Heifers classified as PROBLEM had significantly lower odds of conceiving to the first AI serve and of becoming pregnant within the first three and six weeks of the breeding season (P ≤ 0.05). In conclusion, the proposed matrix could be practically useful for classifying heifers prior to the breeding season.
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Affiliation(s)
- Eilidh E Thomson
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Marijke E Beltman
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Conor G McAloon
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Mary M Duane
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Jane P N Brennan
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Emmet T Kelly
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
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25
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Zhang T, Song C, Zheng C, Chen X, Zhang Y. Extracellular Amyloid β-protein (1-42) Oligomers Anchor Brain Cells and Make them inert as an Unconventional Integrin-Coupled Ligand. Cell Mol Neurobiol 2023; 43:841-58. [PMID: 35445880 DOI: 10.1007/s10571-022-01219-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 03/30/2022] [Indexed: 12/12/2022]
Abstract
This study aimed to investigate the effect of extracellular Aβ42 on neural cell migration, and the possible molecular mechanisms. Extracellular Aβ42 monomers did not negatively affect the motility of neural cells; however, they could promote cell migration from toxic extracellular Aβ42 oligomers. Contrastingly, extracellular Aβ42 aggregates, especially Aβ42 oligomers, significantly decreased neural cell migration while reducing their survival. Further, their soluble and deposited states showed different effects in causing the neural cells to become inert (incapable of moving). These findings were consistent with that of binding of Aβ42 oligomers to the plasma membrane or integrin receptors of the inert cells. By combining the protection of cell migratory capability by anti-oligomeric Aβ42 scFv antibody with the information obtained from our docking model of the Aβ42 trimer and integrin molecule, our findings suggest that extracellular Aβ42 aggregates disrupt the function of integrins mainly through the RHDS motif of Aβ42 chain, which eventually causes neural cells to become inert. Thus, we propose an "anchor" opinion, where Aβ42 aggregates in the ECM serve as the adverse "anchors" in the brain for anchoring neurons and for making neural cells inert, which causes their dysfunction. The neural cells with damaged motility could be restored or repaired if these anchoring effects of extracellular Aβ42 aggregates on the neural cells were severed or reduced, even if the "anchors" themselves were not completely eliminated. Medicines targeting soluble and deposited anchors of Aβ42 aggregates could be developed into effective treatments for Alzheimer disease.
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26
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Leopold J, Engel KM, Prabutzki P, Schiller J. Combined Use of MALDI-TOF Mass Spectrometry and 31P NMR Spectroscopy for the Analysis of (Phospho)Lipids. Methods Mol Biol 2023; 2625:183-200. [PMID: 36653644 DOI: 10.1007/978-1-0716-2966-6_17] [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: 06/17/2023]
Abstract
Lipids are important and abundant constituents of all biological tissues and body fluids. In particular, phospholipids (PLs) constitute a major part of the cellular membrane and play a role in signal transduction, and some selected PLs are increasingly considered as potential disease markers. Unfortunately, methods of lipid analysis are less established in comparison to techniques of protein analysis. Mass spectrometry (MS) is an increasingly used technique to analyze lipids, especially in combination with electrospray ionization MS, which is the most commonly used ionization technique in lipidomics. Matrix-assisted laser desorption/ionization coupled to time-of-flight MS (MALDI-TOF MS) has itself proven to represent a useful tool in the field of lipid analysis. 31P nuclear magnetic resonance (NMR) spectroscopy, another powerful method for PL analysis, represents a direct quantitative method and does not suffer from suppression effects.This paper gives an overview of methodological aspects of MALDI-TOF MS and 31P NMR in lipid research and summarizes the specific advantages and drawbacks of both methods. In particular, suppression effects in MS will be highlighted, and possible ways to overcome this problem, e.g., the use of different matrices and separation of the relevant lipid mixture prior to analysis, will be discussed.
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Affiliation(s)
- Jenny Leopold
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | - Kathrin M Engel
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | - Patricia Prabutzki
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | - Jürgen Schiller
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Leipzig University, Leipzig, Germany.
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27
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He L, Tronstad KJ, Maheshwari A. Mitochondrial Dynamics during Development. Newborn (Clarksville) 2023; 2:19-44. [PMID: 37206581 PMCID: PMC10193651 DOI: 10.5005/jp-journals-11002-0053] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Mitochondria are dynamic membrane-bound organelles in eukaryotic cells. These are important for the generation of chemical energy needed to power various cellular functions and also support metabolic, energetic, and epigenetic regulation in various cells. These organelles are also important for communication with the nucleus and other cellular structures, to maintain developmental sequences and somatic homeostasis, and for cellular adaptation to stress. Increasing information shows mitochondrial defects as an important cause of inherited disorders in different organ systems. In this article, we provide an extensive review of ontogeny, ultrastructural morphology, biogenesis, functional dynamics, important clinical manifestations of mitochondrial dysfunction, and possibilities for clinical intervention. We present information from our own clinical and laboratory research in conjunction with information collected from an extensive search in the databases PubMed, EMBASE, and Scopus.
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Affiliation(s)
- Ling He
- Department of Pediatrics and Pharmacology, Johns Hopkins University, Baltimore, United States of America
| | | | - Akhil Maheshwari
- Founding Chairman, Global Newborn Society, Clarksville, Maryland, United States of America
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28
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Abstract
There are many different methodologies in the literature for the preparation of plant material for subsequent MALDI MSI analysis. This chapter overviews preparation of cucumbers (Cucumis sativus L.), with emphasis on sample freezing, cryosectioning, and matrix deposition. This should act as a representative example of sample preparation for plant tissue, and due to wide sample variation (e.g., leaves, seeds, and fruit) and analytes of interest, method optimization will be required for different samples.
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Affiliation(s)
- Robert Bradshaw
- Biomolecular Sciences Research Centre (BMRC), Sheffield Hallam University, Sheffield, UK.
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29
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Qian W, Schmidt R, Turner JA, Bare SP, Lappe JM, Recker RR, Akhter MP. A pilot study on the nanoscale properties of bone tissue near lacunae in fracturing women. Bone Rep 2022; 17:101604. [PMID: 35874169 PMCID: PMC9304727 DOI: 10.1016/j.bonr.2022.101604] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/09/2022] [Accepted: 07/12/2022] [Indexed: 11/17/2022] Open
Abstract
The goal of this study is to investigate the causes of osteoporosis-related skeletal fragility in postmenopausal women. We hypothesize that bone fragility in these individuals is largely due to mineral, and/or intrinsic material properties in the osteocyte lacunar/peri-lacunar regions of bone tissue. Innovative measurements with nanoscale resolution, including scanning electron microscope (SEM), an atomic force microscope that is integrated with infrared spectroscopy (AFM-IR), and nanoindentation, were used to characterize osteocyte lacunar and peri-lacunar properties in bone biopsies from fracturing (Cases) and matched (Age, BMD), non-fracturing (Controls) postmenopausal healthy women. In the peri-lacunar space, the nanoindentation results show that the modulus and hardness of the Controls are lower than the Cases. The AFM-IR results conclusively show that the mineral matrix, maturity (peak) (except in outer/far regions in Controls) were greater in Controls than in Cases. Furthermore, these results indicate that while mineral-to-matrix area ratio tend to be greater, the mineral maturity and crystallinity peak ratio “near” lacunae is greater than at regions “far” or more distance from lacunae in the Controls only. Due to the heterogeneity of bone structure, additional measurements are needed to provide more convincing evidence of altered lacunar characteristics and changes in the peri-lacunar bone as mechanisms related to postmenopausal women and fragility. Such findings would motivate new osteocyte-targeted treatments to reduce fragility fracture risks in these groups. Material properties around the osteocyte lacunae in human bone biopsies are presented. Using nanoindentation/nanoIR, the properties in bone tissue from women are measured. Mineral and material strength are different between fracturing and non-fracturing women.
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Affiliation(s)
- Wen Qian
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588-0526, United States of America
| | - Roman Schmidt
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588-0526, United States of America
| | - Joseph A. Turner
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588-0526, United States of America
| | - Sue P. Bare
- Osteoporosis Research Center, Creighton University School of Medicine, Omaha, NE 68178, United States of America
| | - Joan M. Lappe
- Osteoporosis Research Center, Creighton University School of Medicine, Omaha, NE 68178, United States of America
| | - Robert R. Recker
- Osteoporosis Research Center, Creighton University School of Medicine, Omaha, NE 68178, United States of America
| | - Mohammed P. Akhter
- Osteoporosis Research Center, Creighton University School of Medicine, Omaha, NE 68178, United States of America
- Corresponding author.
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Lunde IG, Aronsen JM, Melleby AO, Strand ME, Skogestad J, Bendiksen BA, Ahmed MS, Sjaastad I, Attramadal H, Carlson CR, Christensen G. Cardiomyocyte-specific overexpression of syndecan-4 in mice results in activation of calcineurin-NFAT signalling and exacerbated cardiac hypertrophy. Mol Biol Rep 2022; 49:11795-11809. [PMID: 36205855 PMCID: PMC9712407 DOI: 10.1007/s11033-022-07985-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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/24/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Cardiomyocyte hypertrophy is a hallmark of cardiac dysfunction in patients with aortic stenosis (AS), and can be triggered by left ventricular (LV) pressure overload in mice by aortic banding (AB). Syndecan-4 is a transmembrane heparan sulphate proteoglycan which is found increased in the myocardium of AS patients and AB mice. The role of syndecan-4 in cardiomyocyte hypertrophy is not well understood. PURPOSE OF THE STUDY We developed mice with cardiomyocyte-specific overexpression of syndecan-4 (Sdc4-Tg) and subjected these to AB to examine the role of syndecan-4 in hypertrophy and activation of the pro-hypertrophic calcineurin-NFAT signalling pathway. METHODS AND RESULTS Sdc4-Tg mice showed exacerbated cardiac remodelling upon AB compared to wild type (WT). At 2-6 weeks post-AB, Sdc4-Tg and WT mice showed similar hypertrophic growth, while at 20 weeks post-AB, exacerbated hypertrophy and dysfunction were evident in Sdc4-Tg mice. After cross-breeding of Sdc4-Tg mice with NFAT-luciferase reporter mice, we found increased NFAT activation in Sdc4-Tg hearts after AB. Immunoprecipitation showed that calcineurin bound to syndecan-4 in Sdc4-Tg hearts. Isolated cardiomyocytes from Sdc4-Tg mice showed alterations in Ca2+ fluxes, suggesting that syndecan-4 regulated Ca2+ levels, and thereby, activating the syndecan-4-calcineurin complex resulting in NFAT activation and hypertrophic growth. Similarly, primary cardiomyocyte cultures from neonatal rats showed increased calcineurin-NFAT-dependent hypertrophic growth upon viral Sdc4 overexpression. CONCLUSION Our study of mice with cardiomyocyte-specific overexpression of Sdc4 have revealed that syndecan-4 is important for activation of the Ca2+-dependent calcineurin-NFAT signalling pathway, hypertrophic remodelling and dysfunction in cardiomyocytes in response to pressure overload.
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Affiliation(s)
- Ida G Lunde
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway.
- KG Jebsen Center for Cardiac Research, University of Oslo, Oslo, Norway.
- Division of Diagnostics and Technology, Akershus University Hospital, Lørenskog, Norway.
- Institute for Experimental Medical Research (IEMR), Oslo University Hospital Ullevaal, Building 7, 4th floor, Kirkeveien 166, 0407, Oslo, Norway.
| | - J Magnus Aronsen
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- Institute for Medical Biosciences, University of Oslo, Oslo, Norway
| | - A Olav Melleby
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- Institute for Medical Biosciences, University of Oslo, Oslo, Norway
| | - Mari E Strand
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Center for Cardiac Research, University of Oslo, Oslo, Norway
| | - Jonas Skogestad
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- Institute for Medical Biosciences, University of Oslo, Oslo, Norway
| | - Bård A Bendiksen
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Center for Cardiac Research, University of Oslo, Oslo, Norway
| | - M Shakil Ahmed
- Institute for Surgical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Ivar Sjaastad
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Center for Cardiac Research, University of Oslo, Oslo, Norway
| | - Håvard Attramadal
- Institute for Surgical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Cathrine R Carlson
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Center for Cardiac Research, University of Oslo, Oslo, Norway
| | - Geir Christensen
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
- KG Jebsen Center for Cardiac Research, University of Oslo, Oslo, Norway
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LaKind JS, Burns CJ, Mattison DR. Commentary: Systematic reviews and observational epidemiology: The more things change…. Glob Epidemiol 2022; 4:100088. [PMID: 37637020 PMCID: PMC10446007 DOI: 10.1016/j.gloepi.2022.100088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/04/2022] [Accepted: 10/14/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- Judy S. LaKind
- LaKind Associates, LLC, 106 Oakdale Avenue, Catonsville, Maryland 21228 USA; Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Carol J. Burns
- Burns Epidemiology Consulting, LLC, 255 W. Sunset Ct., Sanford, MI 48657, USA
| | - Donald R. Mattison
- Arnold School of Public Health, Department of Biostatistics and Epidemiology University of South Carolina, 921 Assembly Street, Columbia, SC 29208, USA
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32
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Hijazi N, Shi Z, Rockey DC. Characterization of focal adhesion proteins in rodent hepatic stellate cells. Histochem Cell Biol 2022; 158:325-334. [PMID: 35960334 PMCID: PMC10824234 DOI: 10.1007/s00418-022-02123-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: 06/01/2022] [Indexed: 11/04/2022]
Abstract
Ongoing liver injury leads to fibrosis and ultimately cirrhosis, a leading cause of death worldwide. The primary mechanism underlying the fibrogenic response is the activation of cells known as hepatic stellate cells (HSCs) which are "quiescent" in the normal liver but become "activated" after injury by transdifferentiating into extracellular matrix-secreting myofibroblasts. Since integrins (extracellular matrix binding receptors) are important mediators of HSC activation and fibrogenesis, we hypothesized that focal adhesion (FA) proteins, which link integrins to the intracellular protein machinery, may be important in the activation process. Therefore, using both an in vitro model of activation in primary rat HSCs and an in vivo model of liver injury, we examined three FA proteins: vinculin, FAK, and talin. All three proteins were significantly upregulated during HSC activation at both the messenger RNA (mRNA) and protein levels. Confocal microscopy demonstrated that the proteins had a widespread expression throughout HSCs with prominent localization at the end of actin filaments. Finally, we stimulated HSCs with the profibrotic ligands endothelin-1 (ET-1) and transforming growth factor beta (TGF-β) and observed an increase in the size of vinculin-containing FAs and the cell area occupied by them. The data indicate that HSCs possess a broad array of FA proteins, and given their upregulation during activation, this raises the possibility that they play a role in the fibrogenic response to injury.
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Affiliation(s)
- Nour Hijazi
- Digestive Disease Research Core Center, Medical University of South Carolina, 96 Jonathan Lucas Street, Clinical Sciences Building, Suite 912, Charleston, SC 29425, USA
| | - Zengdun Shi
- Digestive Disease Research Core Center, Medical University of South Carolina, 96 Jonathan Lucas Street, Clinical Sciences Building, Suite 912, Charleston, SC 29425, USA
| | - Don C. Rockey
- Digestive Disease Research Core Center, Medical University of South Carolina, 96 Jonathan Lucas Street, Clinical Sciences Building, Suite 912, Charleston, SC 29425, USA
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Zheng Q, Shen J, Xu Y, Pandey V, Guan L. Pattern mechanism in stochastic SIR networks with ER connectivity. Physica A 2022; 603:127765. [PMID: 35757185 PMCID: PMC9212650 DOI: 10.1016/j.physa.2022.127765] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/13/2022] [Indexed: 05/04/2023]
Abstract
The diffusion of the susceptible and infected is a vital factor in spreading infectious diseases. However, the previous SIR networks cannot explain the dynamical mechanism of periodic behavior and endemic diseases. Here, we incorporate the diffusion and network effect into the SIR model and describes the mechanism of periodic behavior and endemic diseases through wavenumber and saddle-node bifurcation. We also introduce the standard network structured entropy (NSE) and demonstrate diffusion effect could induce the saddle-node bifurcation and Turing instability. Then we reveal the mechanism of the periodic outbreak and endemic diseases by the mean-field method. We provide the Turing instability condition through wavenumber in this network-organized SIR model. In the end, the data from COVID-19 authenticated the theoretical results.
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Affiliation(s)
- Qianqian Zheng
- School of Science, Xuchang University, Xuchang, Henan 461000, China
- School of Mathematics and Statistics, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
| | - Jianwei Shen
- School of Mathematics and Statistics, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
| | - Yong Xu
- School of Mathematics and Statistics, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
| | - Vikas Pandey
- School of Medicine, University of California, Los Angeles, CA 90095, USA
- NIPS, National Institute of Natural Science, Okazaki 4448585, Japan
| | - Linan Guan
- School of Mathematics and Statistics, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
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Egorova DA, Solovyev AI, Polyakov NB, Danilova KV, Scherbakova AA, Kravtsov IN, Dmitrieva MA, Rykova VS, Tutykhina IL, Romanova YM, Gintsburg AL. Biofilm matrix proteome of clinical strain of P. aeruginosa isolated from bronchoalveolar lavage of patient in intensive care unit. Microb Pathog 2022; 170:105714. [PMID: 35973647 DOI: 10.1016/j.micpath.2022.105714] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 03/06/2022] [Revised: 05/30/2022] [Accepted: 08/04/2022] [Indexed: 10/15/2022]
Abstract
Extracellular matrix plays a pivotal role in biofilm biology and proposed as a potential target for therapeutics development. As matrix is responsible for some extracellular functions and influence bacterial cytotoxicity against eukaryotic cells, it must have unique protein composition. P. aeruginosa is one of the most important pathogens with emerging antibiotic resistance, but only a few studies were devoted to matrix proteomes and there are no studies describing matrix proteome for any clinical isolates except reference strains PAO1 and ATCC27853. Here we report the first biofilm matrix proteome of P. aeruginosa isolated from bronchoalveolar lavage of patient in intensive care unit. We have identified the largest number of proteins in the matrix among all published studies devoted to P. aeruginosa biofilms. Comparison of matrix proteome with proteome from embedded cells let us to identify several enriched bioprocess groups. Bioprocess groups with the largest number of overrepresented in matrix proteins were oxidation-reduction processes, proteolysis, and transmembrane transport. The top three represented in matrix bioprocesses concerning the size of the GO annotated database were cell redox homeostasis, nucleoside metabolism, and fatty acid synthesis. Finally, we discuss the obtained data in a prism of antibiofilm therapeutics development.
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Affiliation(s)
- Daria A Egorova
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1).
| | - Andrey I Solovyev
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Nikita B Polyakov
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Ksenya V Danilova
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Anastasya A Scherbakova
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Ivan N Kravtsov
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Maria A Dmitrieva
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Valentina S Rykova
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Irina L Tutykhina
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1)
| | - Yulia M Romanova
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1); I.M. Sechenov First Moscow State Medical University, Moscow, 119992, Russia(2)
| | - Alexander L Gintsburg
- National Research Center of Epidemiology and Microbiology n. a. N.F. Gamaleya, Russian Ministry of Health, Moscow, 123098, Russia(1); I.M. Sechenov First Moscow State Medical University, Moscow, 119992, Russia(2)
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Dozzo A, Galvin A, Shin JW, Scalia S, O'Driscoll CM, Ryan KB. Modelling acute myeloid leukemia (AML): What's new? A transition from the classical to the modern. Drug Deliv Transl Res 2022:10.1007/s13346-022-01189-4. [PMID: 35930221 DOI: 10.1007/s13346-022-01189-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2022] [Indexed: 11/24/2022]
Abstract
Acute myeloid leukemia (AML) is a heterogeneous malignancy affecting myeloid cells in the bone marrow (BM) but can spread giving rise to impaired hematopoiesis. AML incidence increases with age and is associated with poor prognostic outcomes. There has been a disconnect between the success of novel drug compounds observed in preclinical studies of hematological malignancy and less than exceptional therapeutic responses in clinical trials. This review aims to provide a state-of-the-art overview on the different preclinical models of AML available to expand insights into disease pathology and as preclinical screening tools. Deciphering the complex physiological and pathological processes and developing predictive preclinical models are key to understanding disease progression and fundamental in the development and testing of new effective drug treatments. Standard scaffold-free suspension models fail to recapitulate the complex environment where AML occurs. To this end, we review advances in scaffold/matrix-based 3D models and outline the most recent advances in on-chip technology. We also provide an overview of clinically relevant animal models and review the expanding use of patient-derived samples, which offer the prospect to create more "patient specific" screening tools either in the guise of 3D matrix models, microphysiological "organ-on-chip" tools or xenograft models and discuss representative examples.
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Affiliation(s)
| | - Aoife Galvin
- School of Pharmacy, University College Cork, Cork, Ireland
| | - Jae-Won Shin
- Department of Pharmacology and Regenerative Medicine, University of Illinois at Chicago College of Medicine, 909 S. Wolcott Ave, Chicago, IL, 5091 COMRB, USA
| | - Santo Scalia
- Università degli Studi di Ferrara, Via Luigi Borsari 46, 44121, Ferrara, Italy
| | - Caitriona M O'Driscoll
- School of Pharmacy, University College Cork, Cork, Ireland.,SSPC Centre for Pharmaceutical Research, School of Pharmacy, University College Cork, Cork, Ireland
| | - Katie B Ryan
- School of Pharmacy, University College Cork, Cork, Ireland. .,SSPC Centre for Pharmaceutical Research, School of Pharmacy, University College Cork, Cork, Ireland.
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Sonje J, Chisholm CF, Suryanarayanan R. Frozen storage of proteins: Use of mannitol to generate a homogenous freeze-concentrate. Int J Pharm 2022; 630:121995. [PMID: 35809832 DOI: 10.1016/j.ijpharm.2022.121995] [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: 04/29/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 12/14/2022]
Abstract
Therapeutic proteins may be subjected to several freeze-thaw cycles throughout manufacturing and storage. The protein solution composition and the freezing conditions may lead to incomplete ice crystallization in the frozen state. This can also result in freeze-concentrate heterogeneity characterized by multiple glass transition temperatures and protein destabilization. The overall objective was to investigate the potential advantages of including a crystallizing excipient (mannitol) along with a sugar (sucrose or trehalose) for frozen storage. This study showed that the addition of mannitol, a readily crystallizing excipient, facilitated ice crystallization. Inclusion of an isothermal hold during cooling (annealing) maximized the mannitol crystallization and resulted in a homogenous freeze-concentrate of a constant composition characterized by a single glass transition temperature. The role of freezing rate and annealing on both mannitol and ice crystallization were discerned using high intensity synchrotron radiation. The addition of sucrose or trehalose, at an appropriate concentration, stabilized the protein. The mannitol to sugar ratio (3:1 or 1:1, 5 % w/v) was optimized to selectively cause maximal crystallization of mannitol while retaining the sugar amorphous. Human serum albumin (1 mg/mL) in these optimized and annealed compositions did not show any meaningful aggregation, even after multiple freeze-thaw cycles. Thus, in addition to a sugar as a stabilizer, the use of a crystallizing excipient coupled with an annealing step can provide an avenue for frozen storage of proteins.
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Affiliation(s)
- Jayesh Sonje
- Department of Pharmaceutics, College of Pharmacy, 308 Harvard St. SE, University of Minnesota, Minneapolis, MN 55455, USA
| | - Carly Fleagle Chisholm
- Drug Product Development, BioTherapeutics Development & Supply, Janssen Research & Development, Malvern, PA 19355, USA
| | - Raj Suryanarayanan
- Department of Pharmaceutics, College of Pharmacy, 308 Harvard St. SE, University of Minnesota, Minneapolis, MN 55455, USA.
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Allahabadi S, Johnson B, Whitney M, Oji D, Chou L, Lau BC. Short-term outcomes following dehydrated micronized allogenic cartilage versus isolated microfracture for treatment of medial talar osteochondral lesions. Foot Ankle Surg 2022; 28:642-649. [PMID: 34366249 DOI: 10.1016/j.fas.2021.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 04/28/2021] [Revised: 06/08/2021] [Accepted: 07/17/2021] [Indexed: 02/04/2023]
Abstract
BACKGROUND Osteochondral lesions of the talus (OLTs) have been traditionally treated with bone marrow stimulation techniques such as microfracture. However, conventional microfracture results in a biomechanically weaker repair tissue of predominantly type I collagen. Acellular micronized cartilage matrix (MCM) serves as a bioactive scaffold to restore hyaline cartilage. The purpose was to compare short-term outcomes after microfracture with and without augmentation with MCM for medial-sided OLTs. METHODS A retrospective review was performed between 2010-2019 for medial-sided OLTs undergoing treatment with either microfracture augmented with MCM or isolated microfracture. The MCM was hydrated with either bone marrow aspirate concentrate (BMAC) or platelet-rich plasma (PRP). Outcomes included visual analogue scale (VAS) pain scores, Foot and Ankle Activity Measure (FAAM) scores, return-to-daily activities, and return-to-sport. RESULTS 48 patients (14 MCM with PRP, 6 MCM with BMAC; 28 isolated microfracture) with average age 35.5 years (range: 13.8-67.2 years) and mean follow-up 4.0 ± 3.4 years (range,.13-10.7) were included. There was no difference in average lesion size between MCM and microfracture groups (64.0 ± 49.4 mm2 versus 57.3 ± 44.2 mm2, P = .63) and a trend toward larger lesion size for BMAC compared to PRP (106.5 ± 59.2 versus 45.9 ± 32.1 mm2, P = .056). There was no difference in time to return-to-activity (83.5 ± 18.8 versus 87.3 ± 49.1 days) or return-to-sports (151.9 ± 62.2 versus 165 ± 99.2 days) with MCM versus isolated microfracture. However, the MCM group had a significantly greater improvement in VAS pain score at final follow-up (4.9 ± 2.2 versus 2.7 ± 2.6, P = .0032) and significantly higher post-operative FAAM-Activities of Daily Living subscale scores (97.2 ± 8.2 versus 79.7 ± 32.8, P = .033). CONCLUSIONS Augmenting microfracture with MCM hydrated with PRP or BMAC may result in beneficial changes in pain scores and activities of daily living, but similar return-to-activities and return-to-sport times compared to microfracture alone in management of medial OLT. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Sachin Allahabadi
- University of California, San Francisco, Department of Orthopaedic Surgery, San Francisco, CA, USA
| | - Brianna Johnson
- Stanford University, Department of Orthopaedic Surgery, Palo Alto, CA, USA
| | - Malinda Whitney
- Stanford University, Department of Orthopaedic Surgery, Palo Alto, CA, USA
| | - David Oji
- Stanford University, Department of Orthopaedic Surgery, Palo Alto, CA, USA
| | - Loretta Chou
- Stanford University, Department of Orthopaedic Surgery, Palo Alto, CA, USA
| | - Brian C Lau
- Duke Sport Science Institute, Division of Sports Medicine, Department of Orthopaedic Surgery, Duke University, Durham, NC, USA.
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Gazia F, Portelli D, Lo Vano M, Ciodaro F, Galletti B, Bruno R, Freni F, Alberti G, Galletti F. Extended wear hearing aids: a comparative, pilot study. Eur Arch Otorhinolaryngol 2022; 279:5415-5422. [PMID: 35767065 DOI: 10.1007/s00405-022-07445-0] [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: 02/07/2022] [Accepted: 05/09/2022] [Indexed: 11/25/2022]
Abstract
PURPOSE The study evaluated if there were differences between three types of hearing aids, Lyric extended wear (EW), receiver-in-the-ear canal (RITE), completely-in-the-canal (CIC) hearing aids in terms of audiological and psychosocial outcomes. METHODS Fifteen patients were selected. INCLUSION CRITERIA Pure-Tone Average (PTA) air conduction range of hearing threshold at 500, 1000, and 2000 Hz from 15 dB HL to 75 dB HL. Patients were assigned in three groups according to the hearing aid used: Extended wear, RITE, and CIC. Pure-tone audiometry, speech audiometry, free-field pure-tone and speech audiometry with hearing aids, and Matrix sentence test were performed. The Satisfaction with Amplification in Daily Life (SADL) questionnaire and the Abbreviated Profile of Hearing Aid Benefit (APHAB) questionnaire were used to assess the psychosocial and audiological benefits provided by hearing aids. RESULTS No differences were demonstrated in the Matrix sentence test between the groups. A statistically significant difference was present between the "Personal image" of patients with EW and RITE with a p value of 0.01 (better outcome using EW). For the APHAB questionnaire, a significant difference was present in the "Aversiveness" of the patients with EW in comparison to CIC and RITE with a p value of 0.01 (higher aversiveness of sound using EW). CONCLUSION In terms of audiological advantage, extended ear hearing aids are similar to RITE and CIC as demonstrated from the Matrix speech reception threshold. The result was confirmed using the APHAB questionnaire. Extended wear devices are better than daily hearing aids concerning the "personal image".
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Affiliation(s)
- Francesco Gazia
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Daniele Portelli
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy.
| | - Martina Lo Vano
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Francesco Ciodaro
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Bruno Galletti
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Rocco Bruno
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Francesco Freni
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Giuseppe Alberti
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
| | - Francesco Galletti
- Unit of Otorhinolaryngology, Department of Adult and Development Age Human Pathology "Gaetano Barresi", Policlinico G. Martino, University of Messina, Via Consolare Valeria 1, 98125, Messina, ME, Italy
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Abbate I, Zappulla C, Santonocito M, Viola S, La Rosa LR, De Pasquale G, Caviola E, Meloni M, Curatolo MC, Mazzone MG. Preclinical study of a new matrix to help the ocular surface in dry eye disease. Exp Eye Res 2022;:109168. [PMID: 35777472 DOI: 10.1016/j.exer.2022.109168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 06/05/2022] [Accepted: 06/25/2022] [Indexed: 11/23/2022]
Abstract
Dry eye disease (DED), a multifactorial disease of the tears and ocular system, causes loss of tear film homeostasis with damage to the ocular surface. This study aimed to assess whether a peculiar matrix based on sodium hyaluronate (HA), xanthan gum (XNT), glycine (GLY) and betaine (BET) as osmoprotectants, could be involved in biological responses. Wound healing assay on human corneal epithelial (HCE) cells in monolayer showed a synergistic effect of the combination of HA + XNT (**p ≤ 0.01) together with an efficient extracellular matrix remodeling of the formulation in SkinEthic™ HCE 3D-model sought by integrin beta-1 (ITGβ1) expression and morphological analysis by hematoxylin and eosin (H&E), compared to a reference marketed product. The synergistic effect of HA + XNT + GLY + BET showed an antioxidant effect on HCE cells (***p ≤ 0.001). Real-time PCR analysis showed that the combination of GLY + BET seemed to ameliorate the effect exhibited by the single osmoprotectants in reducing tumor necrosis factor-alpha (TNFα, #p ≤ 0.05), interleukin-1 beta (IL1β, ####p ≤ 0.0001) and cyclooxygenases-2 (COX2, ####p ≤ 0.0001) genes in SIRC cells under hyperosmotic stress. Furthermore, pretreatment with XNT, alone and in combination (##p ≤ 0.01), reduced COX2 expression in human non-small cell lung cancer cells (A549). Finally, the formulation was well-tolerated following q.i.d. ocular administration in rabbits during a 28-day study. Due to the synergistic effect of its components, the matrix proved able to repair the ocular surface restoring cell homeostasis and to protect the ocular surface from pro-inflammatory pathways activation and oxidative damage, thus behaving as a reactive oxygen species (ROS) scavenger.
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Morita M, Miyamura M, Yamaguchi A, Sakamoto T. Analysis of individual matrix particles in the Allende meteorite by high-resolution FIB-TOF-SIMS. ANAL SCI 2022; 38:1039-1046. [PMID: 35751002 DOI: 10.1007/s44211-022-00124-4] [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: 03/03/2022] [Accepted: 05/02/2022] [Indexed: 11/26/2022]
Abstract
The matrix in the "Allende meteorite" was analyzed by high-spatial-resolution focused ion beam time-of-flight secondary ion mass spectrometry (FIB-TOF-SIMS), and consisted of fine grains with sizes of several micrometers. It is difficult to analyze the matrix particles individually. As FIB-TOF-SIMS has a high spatial resolution, it can analyze the matrix individually. In addition, if the sample can be smoothed, no other pretreatment is required. By this method, it was clarified that Al, Cr, etc., which were conventionally detected as trace components in mass spectra, existed as fine particles between the matrix particles, rather than as impurities within them. The Al-rich particles did not match the minerals already found in the Allende meteorite matrix. Although the identity of the aluminum-rich particles has not been clarified, the abundance and localization could be observed correctly. Al-rich particles are likely to be affected by metamorphism and have important information to clarify the metamorphism process.
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Affiliation(s)
- Masato Morita
- Department of Applied Physics, Kogakuin University, 2665-1 Nakano-machi, Hachioji, Tokyo, 192-0015, Japan
| | - Masatoshi Miyamura
- Department of Applied Physics, Kogakuin University, 2665-1 Nakano-machi, Hachioji, Tokyo, 192-0015, Japan
| | - Akira Yamaguchi
- National Institute of Polar Research, Tachikawa, Tokyo, 190-8518, Japan
| | - Tetsuo Sakamoto
- Department of Applied Physics, Kogakuin University, 2665-1 Nakano-machi, Hachioji, Tokyo, 192-0015, Japan.
- Graduate School of Electrical Engineering and Electronics, Kogakuin University, 2665-1 Nakano-machi, Hachioji, Tokyo, 192-0015, Japan.
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Rosenkranz M, Leßny S, Noecker B, Breakspear S, Dmitrieva E. Formation of free radicals in human hair under strain: Combined electron paramagnetic resonance (EPR) - Strain technique. Talanta 2022; 249:123707. [PMID: 35751920 DOI: 10.1016/j.talanta.2022.123707] [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: 05/03/2022] [Revised: 06/15/2022] [Accepted: 06/16/2022] [Indexed: 11/19/2022]
Abstract
In this work, the formation of free radicals in human hair and the evolution of the radical concentration under strain, using a combined electron paramagnetic resonance (EPR) - strain technique, has been investigated. The radicals formed in the hair as a result of homolytic bond cleavage in cystine residues of polypeptide chains were identified. Stability of the radicals formed in dry hair and in the presence of water were studied. The spin-strain curves for the grey human hair in dry state and in water are presented and compared with conventional hair stress vs. strain curves. The evolution of sulfur radical species has been found to only occur at strains of above ca. 25%, corresponding with the Post-Yield region of the stress vs. strain behaviour for hair; this indicates that the matrix of the hair in this region behaves like a highly crosslinked gel and helps to explain the reversibility in hair mechanical behaviour below the Post-Yield region.
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Affiliation(s)
- Marco Rosenkranz
- Center of Spectroelectrochemistry, Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstr. 20, 01069, Dresden, Germany
| | - Steffen Leßny
- Center of Spectroelectrochemistry, Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstr. 20, 01069, Dresden, Germany
| | - Bernd Noecker
- Kao Germany GmbH, Pfungstädter Str. 98-100, 64297, Darmstadt, Germany
| | - Steven Breakspear
- Kao Germany GmbH, Pfungstädter Str. 98-100, 64297, Darmstadt, Germany.
| | - Evgenia Dmitrieva
- Center of Spectroelectrochemistry, Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstr. 20, 01069, Dresden, Germany.
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Abstract
Purpose of Review Nutrition often focuses on food composition, yet differences in food form, texture, and matrix influence energy intake and metabolism. This review outlines how these attributes of food impact oral processing, energy intake, and metabolism. Recent Findings Food form has a well-established impact on intake, where liquids are consumed more than solids and semi-solids. For solids, texture properties like thickness, hardness, and lubrication, and geometrical properties like size and shape influence oral processing, eating rate, and intake. Food matrix integrity can influence nutrient and energy absorption and is strongly influenced by food processing. Summary Food texture and matrix play important roles in modulating energy intake and absorption. Future research needs to consider the often overlooked role of texture and matrix effects on energy and metabolic responses to composite foods and meals. Research is needed to understand how processing impacts macro- and micro-structure of food and its long-term impact on energy balance and health.
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Affiliation(s)
- Ciarán G Forde
- Sensory Science and Eating Behaviour, Division of Human Nutrition and Health, Wageningen University and Research, Wageningen, the Netherlands.
| | - Dieuwerke Bolhuis
- Food Quality and Design, Division of Food Technology, Wageningen University and Research, Wageningen, the Netherlands
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Burns CJ, LaKind JS. Elements to increase translation in pyrethroid epidemiology research: A review. Sci Total Environ 2022; 813:152568. [PMID: 34954171 DOI: 10.1016/j.scitotenv.2021.152568] [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: 11/04/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Pyrethroid insecticides have been the subject of numerous epidemiology studies in the past two decades. We examined the pyrethroids epidemiology literature published between 2016 and 2021. Our objective with this exercise was to inform interested readers regarding information on methodological elements that strengthen a study's use for translation (i.e., use in risk assessment) and to describe aspects of future research methods that could improve utility for decision-making. We focused on the following elements: (i) study design that provided evidence that pyrethroid exposure preceded the outcome, (ii) evidence that the method used for exposure characterization was reliable and sufficiently accurate for the intended purpose, and (iii) use of a robust approach for outcome ascertainment. For each of the 74 studies identified via the literature search, we categorized the methodological elements as Acceptable or Supplemental. A study with three Acceptable elements was considered Relevant for risk assessment purposes. Based on our evaluative approach, 18 (24%) of the 74 publications were considered to be Relevant. These publications were categorized as Acceptable for all three elements assessed: confirmed exposure (N = 24), confirmed outcome (N = 64), exposure preceded the outcome (N = 44). Three of these studies were birth cohorts. There were 15 Relevant publications of adults which included 10 Agricultural Health Study cohort publications of self-reported permethrin. Overall, the majority of the reviewed studies used methods that did not permit a determination that pyrethroid exposure preceded the outcome, and/or did not utilize robust methods for exposure assessment and outcome ascertainment. There is an opportunity for investigators and research sponsors to build on the studies reviewed here and to incorporate more translational approaches to studying exposure/outcome associations related to pesticides and other chemicals.
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Affiliation(s)
- Carol J Burns
- Burns Epidemiology Consulting, LLC, Sanford, MI 48657, USA.
| | - Judy S LaKind
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Catonsville, MD 21228, USA
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Belus JM, Regenauer KS, Hutman E, Rose AL, Burnhams W, Andersen LS, Myers B, Joska JA, Magidson JF. Substance use referral, treatment utilization, and patient costs associated with problematic substance use in people living with HIV in Cape Town, South Africa. Drug Alcohol Depend Rep 2022; 2:100035. [PMID: 36845899 PMCID: PMC9948858 DOI: 10.1016/j.dadr.2022.100035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/15/2021] [Accepted: 02/23/2022] [Indexed: 10/19/2022]
Abstract
Introduction Despite efforts to detect and treat problematic substance use (SU) among people living with HIV (PLWH) in South Africa, integration of HIV and SU services is limited. We sought to understand whether PLWH and problematic SU were: (a) routinely referred to SU treatment, a co-located Matrix clinic, (b) used SU treatment services when referred, and (c) the individual amount spent on SU. Methods Guided by the RE-AIM implementation science framework, we examined patient-level quantitative screening and baseline data from a pilot clinical trial for medication adherence and problematic SU. Qualitative data came from semi-structured interviews with HIV care providers (N = 8), supplemented by patient interviews (N = 15). Results None of the screened patient participants (N = 121) who were seeking HIV care and had problematic SU were engaged in SU treatment, despite the freely available co-located SU treatment program. Only 1.5% of the enrolled patient study sample (N = 66) reported lifetime referral to SU treatment. On average, patients with untreated SU spent 33.3% (SD=34.5%) of their monthly household income on substances. HIV care providers reported a lack of clarity about the SU referral process and a lack of direct communication with patients about patients' needs or interest in receiving an SU referral. Discussion SU treatment referrals and uptake were rare among PLWH reporting problematic SU, despite the high proportion of individual resources allocated to substances and the co-located Matrix site. A standardized referral policy between the HIV and Matrix sites may improve communication and uptake of SU referrals.
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Affiliation(s)
- Jennifer M. Belus
- Swiss Tropical and Public Health Institute, Department of Medicine, Basel, Switzerland,University of Basel, Basel, Switzerland,University of Maryland, Department of Psychology, College Park, MD, USA,Corresponding author at: Swiss Tropical and Public Health Institute, Socinstrasse 57, Basel 4051, Switzerland.
| | | | - Elizabeth Hutman
- University of Maryland, School of Public Health, College Park, MD, USA
| | - Alexandra L. Rose
- University of Maryland, Department of Psychology, College Park, MD, USA
| | - Warren Burnhams
- City of Cape Town, Department of Health, Cape Town, South Africa
| | - Lena S. Andersen
- University of Copenhagen, Global Health Section, Department of Public Health, Copenhagen, Denmark
| | - Bronwyn Myers
- Curtin enAble Institute, Faculty of Health Sciences, Curtin University, Perth, WA, Australia,South African Medical Research Council, Alcohol, Tobacco, and Other Drug Research Unit, Cape Town, South Africa,University of Cape Town, Division of Addiction Psychiatry, Department of Psychiatry and Mental Health, Cape Town, South Africa
| | - John A. Joska
- University of Cape Town, HIV Mental Health Research Unit, Division of Neuropsychiatry, Department of Psychiatry and Mental Health, Cape Town, South Africa
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Qiu Z, Zheng Z, Song Z, Sun Y, Shan Q, Lin Z, Xie Z. Co 3O 4 nanocrystals as matrices for the detection of amino acids, harmful additives and pesticide residues by MALDI-TOF MS. Talanta 2022; 242:123299. [PMID: 35183982 DOI: 10.1016/j.talanta.2022.123299] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 09/18/2021] [Revised: 01/29/2022] [Accepted: 02/04/2022] [Indexed: 01/04/2023]
Abstract
Research of detection of low molecular weight compounds on human health and biological systems become increasingly important. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), a soft ionization equipment, is a rapid, reliable, high-sensitivity, high-throughput and simple test instrument. However, the application of MALDI-TOF MS in the analysis of small molecules (<500 Da) has become a great challenge because of the interference from the conventional matrices in low mass region when using conventional matrices. In this research, tricobalt tetraoxide (Co3O4) nanocrystals with rich surface hydroxyl groups were synthesized and served as novel matrices for the detection of small molecules by MALDI-TOF MS. In comparison with conventional organic matrices, the use of as-prepared Co3O4 nanocrystal matrices showed little matrix background interference, good reproducibility and high signal intensity in the analyses of amino acids, harmful additives and pesticide residues. For the detection of most amino acids, Co3O4 nanocrystal matrices have good detection performance both in the positive and negative ion modes and have a unique decarboxylation peak in the positive ion mode, which is conducive to the identification of amino acids. In addition, Co3O4 nanocrystals are completely feasible to test triadimefon, pirimicarb and other pesticide residues, as well as additives such as bisphenol A and melamine in the positive ion mode. It is also feasible to detect small molecule compounds in practical samples using Co3O4 nanocrystals as matrices. We believe the work provides an alternative approach for the detection of small molecules and expands the application scope of Co3O4 nanocrystals.
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Affiliation(s)
- Zufeng Qiu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhiping Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhijia Song
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yunchao Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Qiheng Shan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhiwei Lin
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
| | - Zhaoxiong Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, 361005, China.
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Gomes F, Turano H, Ramos A, de Barros MH, Haddad LA, Netto LES. Dissecting the molecular mechanisms of mitochondrial import and maturation of peroxiredoxins from yeast and mammalian cells. Biophys Rev 2021; 13:983-94. [PMID: 35059022 DOI: 10.1007/s12551-021-00899-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 11/01/2021] [Indexed: 12/26/2022] Open
Abstract
Peroxiredoxins (Prxs) are cysteine-based peroxidases that play a central role in keeping the H2O2 at physiological levels. Eukaryotic cells express different Prxs isoforms, which differ in their subcellular locations and substrate specificities. Mitochondrial Prxs are synthesized in the cytosol as precursor proteins containing N-terminal cleavable presequences that act as mitochondrial targeting signals. Due to the fact that presequence controls the import of the vast majority of mitochondrial matrix proteins, the mitochondrial Prxs were initially predicted to be localized exclusively in the matrix. However, recent studies showed that mitochondrial Prxs are also targeted to the intermembrane space by mechanisms that remain poorly understood. While in yeast the IMP complex can translocate Prx1 to the intermembrane space, the maturation of yeast Prx1 and mammalian Prdx3 and Prdx5 in the matrix has been associated with sequential cleavages of the presequence by MPP and Oct1/MIP proteases. In this review, we describe the state of the art of the molecular mechanisms that control the mitochondrial import and maturation of Prxs of yeast and human cells. Once mitochondria are considered the major intracellular source of H2O2, understanding the mitochondrial Prx biogenesis pathways is essential to increase our knowledge about the H2O2-dependent cellular signaling, which is relevant to the pathophysiology of some human diseases.
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Liu H, He Y, Gao Z, Zhang G, Cao K, Jing QS. Self-induced matrix with Li-ion storage activity in ultrathin CuMnO 2 nanosheets electrode. J Colloid Interface Sci 2022; 606:1101-10. [PMID: 34500149 DOI: 10.1016/j.jcis.2021.08.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 11/22/2022]
Abstract
Conversion anode materials such as Mn3O4 draw much attention due to their considerable theoretical capacity for lithium-ion batteries (LIBs). However, poor conductivity, slow solid-state Li-ion diffusion, and huge volume expansion of the active materials during charge/discharge lead to unsatisfied electrochemical performance. Despite several strategies like nanocrystallization, fabricating hierarchical nanostructures, and introducing a matrix are valid to address these crucial issues, the achieved electrochemical performance still needs to be further enhanced. What is worse, the matrix with less or no Li-ion storage activity may lower the achieved capacity of the electrodes. Herein, ultra-thin CuMnO2 nanosheets with the thickness of 5-8 nm were evaluated for LIBs. The ultra-thin sheet-like nanostructure offers sufficient contact areas with electrolyte and shortens the Li-ion diffusion distance. Moreover, the in-situ generated Mn and Cu along with their oxides could play the role of matrix and conductive agent in turn at different stages, relieving the stress brought by volume expansion. Therefore, the as-prepared ultra-thin CuMnO2 nanosheets electrode displays a remarkable reversible capacity, long cycling stability, and outstanding rate capability (a reversible capacity of 1160.5 mAh g-1 at 0.1A g-1 was retained after 100 cycles with a capacity retention of 95.1 %, and 717.8 mAh g-1 at 2.0 A g-1 after 400 cycles).
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Engel KM, Prabutzki P, Leopold J, Nimptsch A, Lemmnitzer K, Vos DRN, Hopf C, Schiller J. A new update of MALDI-TOF mass spectrometry in lipid research. Prog Lipid Res 2022; 86:101145. [PMID: 34995672 DOI: 10.1016/j.plipres.2021.101145] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [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: 08/31/2021] [Revised: 12/06/2021] [Accepted: 12/29/2021] [Indexed: 01/06/2023]
Abstract
Matrix-assisted laser desorption and ionization (MALDI) mass spectrometry (MS) is an indispensable tool in modern lipid research since it is fast, sensitive, tolerates sample impurities and provides spectra without major analyte fragmentation. We will discuss some methodological aspects, the related ion-forming processes and the MALDI MS characteristics of the different lipid classes (with the focus on glycerophospholipids) and the progress, which was achieved during the last ten years. Particular attention will be given to quantitative aspects of MALDI MS since this is widely considered as the most serious drawback of the method. Although the detailed role of the matrix is not yet completely understood, it will be explicitly shown that the careful choice of the matrix is crucial (besides the careful evaluation of the positive and negative ion mass spectra) in order to be able to detect all lipid classes of interest. Two developments will be highlighted: spatially resolved Imaging MS is nowadays well established and the distribution of lipids in tissues merits increasing interest because lipids are readily detectable and represent ubiquitous compounds. It will also be shown that a combination of MALDI MS with thin-layer chromatography (TLC) enables a fast spatially resolved screening of an entire TLC plate which makes the method competitive with LC/MS.
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Affiliation(s)
- Kathrin M Engel
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Patricia Prabutzki
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Jenny Leopold
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Ariane Nimptsch
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Katharina Lemmnitzer
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - D R Naomi Vos
- Center for Biomedical Mass Spectrometry and Optical Spectroscopy (CeMOS), Mannheim University of Applied Sciences, Paul-Wittsack-Strasse 10, D-68163 Mannheim, Germany
| | - Carsten Hopf
- Center for Biomedical Mass Spectrometry and Optical Spectroscopy (CeMOS), Mannheim University of Applied Sciences, Paul-Wittsack-Strasse 10, D-68163 Mannheim, Germany
| | - Jürgen Schiller
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany.
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Rhodes CS, Yoshitomi Y, Burbelo PD, Freese NH, Nakamura T, Chiba Y, Yamada Y; NIDCD/NIDCR Genomics and Computational Biology Core. Sp6/Epiprofin is a master regulator in the developing tooth. Biochem Biophys Res Commun 2021; 581:89-95. [PMID: 34662808 DOI: 10.1016/j.bbrc.2021.10.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/25/2021] [Accepted: 10/07/2021] [Indexed: 12/26/2022]
Abstract
Tooth development involves the coordinated transcriptional regulation of extracellular matrix proteins produced by ameloblasts and odontoblasts. In this study, whole-genome ChIP-seq analysis was applied to identify the transcriptional regulatory gene targets of Sp6 in mesenchymal cells of the developing tooth. Bioinformatic analysis of a pool of Sp6 target peaks identified the consensus nine nucleotide binding DNA motif CTg/aTAATTA. Consistent with these findings, a number of enamel and dentin matrix genes including amelogenin (Amelx), ameloblastin (Ambn), enamelin (Enam) and dental sialophosphoprotein (Dspp), were identified to contain Sp6 target sequences. Sp6 peaks were also found in other important tooth genes including transcription factors (Dlx2, Dlx3, Dlx4, Dlx5, Sp6, Sp7, Pitx2, and Msx2) and extracellular matrix-related proteins (Col1a2, Col11a2, Halpn1). Unsupervised UMAP clustering of tooth single cell RNA-seq data confirmed the presence of Sp6 transcripts co-expressed with many of the identified target genes within ameloblasts and odontoblasts. Lastly, transcriptional reporter assays using promoter fragments from the Hapln1 and Sp6 gene itself revealed that Sp6 co-expression enhanced gene transcriptional activity. Taken together these results highlight that Sp6 is a major regulator of multiple extracellular matrix genes in the developing tooth.
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Abstract
The One Health concept that human, animal, plant, environmental, and ecosystem health are linked provides a framework for examining and addressing complex health challenges. This framework can be represented as a multi-dimensional matrix that can be used as a tool to identify upstream drivers of disease potential in a concise, systematic, and comprehensive way. The matrix can involve up to four dimensions depending on users' needs. This paper describes and illustrates how the matrix tool might be used to facilitate systems thinking, enabling the development of effective and equitable public policies. The multidimensional One Health matrix tool will be used to examine, as an example, global human and animal fecal wastes. The fecal wastes are analyzed at the microbial and population levels over a timeframe of years. Political, social, and economic factors are part of the matrix and will be examined as well. The One Health matrix tool illustrates how foodborne illnesses, food insecurity, antimicrobial resistance, and climate change are inter-related. Understanding these inter-relationships is essential to develop the public policies needed to achieve many of the United Nations' Sustainable Development Goals.
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