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Liang M, Xu Y, Ren X, Huang D, Jin M, Qiu Z. The U-shaped association between serum osmolality and 28-day mortality in patients with sepsis: a retrospective cohort study. Infection 2024:10.1007/s15010-024-02256-3. [PMID: 38647828 DOI: 10.1007/s15010-024-02256-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 04/01/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Sepsis is a recognized global health challenge that places a considerable disease burden on countries. Although there has been some progress in the study of sepsis, the mortality rate of sepsis remains high. The relationship between serum osmolality and the prognosis of patients with sepsis is unclear. METHOD Patients with sepsis who met the criteria in the Medical Information Mart for Intensive Care IV database were included in the study. Hazard ratios (HRs) and 95% confidence intervals (CIs) were determined using multivariable Cox regression. The relationship between serum osmolality and the 28-day mortality risk in patients with sepsis was investigated using curve fitting, and inflection points were calculated. RESULTS A total of 13,219 patients with sepsis were enrolled in the study; the mean age was 65.1 years, 56.9 % were male, and the 28-day mortality rate was 18.8 %. After adjusting for covariates, the risk of 28-day mortality was elevated by 99% (HR 1.99, 95%CI 1.74-2.28) in the highest quintile of serum osmolality (Q5 >303.21) and by 59% (HR 1.59, 95%CI 1.39-1.83) in the lowest quintile (Q1 ≤285.80), as compared to the reference quintile (Q3 291.38-296.29). The results of the curve fitting showed a U-shaped relationship between serum osmolality and the risk of 28-day mortality, with an inflection point of 286.9 mmol/L. CONCLUSION There is a U-shaped relationship between serum osmolality and the 28-day mortality risk in patients with sepsis. Higher or lower serum osmolality is associated with an increased risk of mortality in patients with sepsis. Patients with sepsis have a lower risk of mortality when their osmolality is 285.80-296.29 mmol/L.
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Affiliation(s)
- Minghao Liang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.
| | - Yifei Xu
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xiuhong Ren
- Qilu Hospital of Shandong University, Jinan, China
| | - Di Huang
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Minyan Jin
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Zhanjun Qiu
- The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China.
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2
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Wei W, Li W, Yang L, Weeramantry S, Ma L, Fu P, Zhao Y. Tight junctions and acute kidney injury. J Cell Physiol 2023; 238:727-741. [PMID: 36815285 DOI: 10.1002/jcp.30976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 01/27/2023] [Accepted: 02/04/2023] [Indexed: 02/24/2023]
Abstract
Acute kidney injury (AKI) is characterized by a rapid reduction in kidney function caused by various etiologies. Tubular epithelial cell dysregulation plays a pivotal role in the pathogenesis of AKI. Tight junction (TJ) is the major molecular structure that connects adjacent epithelial cells and is critical in maintaining barrier function and determining the permeability of epithelia. TJ proteins are dysregulated in various types of AKI, and some reno-protective drugs can reverse TJ changes caused by insult. An in-depth understanding of TJ regulation and its causality with AKI will provide more insight to the disease pathogenesis and will shed light on the potential role of TJs to serve as novel therapeutic targets in AKI.
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Affiliation(s)
- Wei Wei
- Division of Nephrology and Kidney Research Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Weiying Li
- Department of Internal Medicine, Florida Hospital/AdventHealth, Orlando, Florida, USA
| | - Letian Yang
- Division of Nephrology and Kidney Research Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Savidya Weeramantry
- Department of Internal Medicine, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Liang Ma
- Division of Nephrology and Kidney Research Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ping Fu
- Division of Nephrology and Kidney Research Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yuliang Zhao
- Division of Nephrology and Kidney Research Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Cenhrang K, Robart L, Castiaux AD, Martin RS. 3D printed devices with integrated collagen scaffolds for cell culture studies including transepithelial/transendothelial electrical resistance (TEER) measurements. Anal Chim Acta 2022; 1221:340166. [PMID: 35934386 PMCID: PMC9511703 DOI: 10.1016/j.aca.2022.340166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 07/07/2022] [Accepted: 07/10/2022] [Indexed: 11/01/2022]
Abstract
In this paper, we describe the use of 3D printed devices for both static and flow studies that contain electrospun collagen scaffolds and can accommodate transepithelial/transendothelial electrical resistance (TEER) measurements. Electrospinning was used to create the collagen scaffold, followed by an optimized 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-Hydroxysuccinimide (EDC/NHS) cross-linking procedure to produce stable collagen fibers that are similar in size to fibers in vivo. LC/MS was used to study the leaching of solvent and NHS from the scaffold, with several rinsing steps being shown to eliminate the leaching and promote the culture of Madin-Darby Canine Kidney (MDCK) epithelial cells on the scaffold. Both static and flow 2-part devices were successfully fabricated by 3D printing using either VeroClear or MED610 material (PolyJet printing) and assembling the scaffold between laser cut Teflon gaskets. The devices were designed to easily accommodate commonly used STX2 chopstick electrodes for TEER measurements. A detailed comparison was made between the use of collagen scaffolds vs other electrospun materials for cell culture. The collagen extracellular matrix model displayed a high barrier functionality for up to 7 days. In addition, a different 3D printed device with a collagen scaffold is described to incorporate continuous flow and replenishment of media under the cell layer in a manner that also enables periodic recording of TEER measurements. Overall, this work shows that the combination of biological ECM materials such as collagen into microfluidic devices that incorporate flow have great potential to form more realistic cell culture models in areas such as blood brain barrier research.
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Affiliation(s)
| | - Logan Robart
- Department of Chemistry, Saint Louis University, USA
| | - Andre D Castiaux
- Department of Chemistry, Saint Louis University, USA; Center for Additive Manufacturing, Saint Louis University, USA
| | - R Scott Martin
- Department of Chemistry, Saint Louis University, USA; Center for Additive Manufacturing, Saint Louis University, USA.
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4
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Bathini P, Sun T, Schenk M, Schilling S, McDannold NJ, Lemere CA. Acute Effects of Focused Ultrasound-Induced Blood-Brain Barrier Opening on Anti-Pyroglu3 Abeta Antibody Delivery and Immune Responses. Biomolecules 2022; 12:951. [PMID: 35883506 PMCID: PMC9313174 DOI: 10.3390/biom12070951] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 11/17/2022] Open
Abstract
Alzheimer's Disease (AD) is a neurodegenerative disorder characterized by the accumulation of amyloid plaques and hyperphosphorylated tau in the brain. Currently, therapeutic agents targeting amyloid appear promising for AD, however, delivery to the CNS is limited due to the blood-brain-barrier (BBB). Focused ultrasound (FUS) is a method to induce a temporary opening of the BBB to enhance the delivery of therapeutic agents to the CNS. In this study, we evaluated the acute effects of FUS and whether the use of FUS-induced BBB opening enhances the delivery of 07/2a mAb, an anti-pyroglutamate-3 Aβ antibody, in aged 24 mo-old APP/PS1dE9 transgenic mice. FUS was performed either unilaterally or bilaterally with mAb infusion and the short-term effect was analyzed 4 h and 72 h post-treatment. Quantitative analysis by ELISA showed a 5-6-fold increase in 07/2a mAb levels in the brain at both time points and an increased brain-to-blood ratio of the antibody. Immunohistochemistry demonstrated an increase in IgG2a mAb detection particularly in the cortex, enhanced immunoreactivity of resident Iba1+ and phagocytic CD68+ microglial cells, and a transient increase in the infiltration of Ly6G+ immune cells. Cerebral microbleeds were not altered in the unilaterally or bilaterally sonicated hemispheres. Overall, this study shows the potential of FUS therapy for the enhanced delivery of CNS therapeutics.
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Affiliation(s)
- Praveen Bathini
- Ann Romney Center for Neurologic Diseases, Brigham and Women’s Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA 02115, USA;
| | - Tao Sun
- Focused Ultrasound Laboratory, Department of Radiology, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA;
| | - Mathias Schenk
- Department of Molecular Drug Biochemistry and Therapy, Fraunhofer Institute for Cell Therapy and Immunology, Weinbergweg 22, 06120 Halle, Germany; (M.S.); (S.S.)
| | - Stephan Schilling
- Department of Molecular Drug Biochemistry and Therapy, Fraunhofer Institute for Cell Therapy and Immunology, Weinbergweg 22, 06120 Halle, Germany; (M.S.); (S.S.)
- Faculty of Applied Biosciences and Process Technology, Anhalt University of Applied Sciences, Bernburger Strasse 55, 06366 Kothen, Germany
| | - Nathan J. McDannold
- Focused Ultrasound Laboratory, Department of Radiology, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA;
| | - Cynthia A. Lemere
- Ann Romney Center for Neurologic Diseases, Brigham and Women’s Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA 02115, USA;
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Abstract
Scanning ion conductance microscopy (SICM) has emerged as a versatile tool for studies of interfaces in biology and materials science with notable utility in biophysical and electrochemical measurements. The heart of the SICM is a nanometer-scale electrolyte filled glass pipette that serves as a scanning probe. In the initial conception, manipulations of ion currents through the tip of the pipette and appropriate positioning hardware provided a route to recording micro- and nanoscopic mapping of the topography of surfaces. Subsequent advances in instrumentation, probe design, and methods significantly increased opportunities for SICM beyond recording topography. Hybridization of SICM with coincident characterization techniques such as optical microscopy and faradaic electrodes have brought SICM to the forefront as a tool for nanoscale chemical measurement for a wide range of applications. Modern approaches to SICM realize an important tool in analytical, bioanalytical, biophysical, and materials measurements, where significant opportunities remain for further exploration. In this review, we chronicle the development of SICM from the perspective of both the development of instrumentation and methods and the breadth of measurements performed.
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Affiliation(s)
- Cheng Zhu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Kaixiang Huang
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Natasha P Siepser
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Lane A Baker
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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Huang K, Castiaux A, Podicheti R, Rusch DB, Martin RS, Baker LA. A Hybrid Nanofiber/Paper Cell Culture Platform for Building a 3D Blood-brain Barrier Model. SMALL METHODS 2021; 5:2100592. [PMID: 34541301 PMCID: PMC8445000 DOI: 10.1002/smtd.202100592] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Indexed: 05/16/2023]
Abstract
The blood brain barrier (BBB) protects the central nervous system from toxins and pathogens in the blood by regulating permeation of molecules through the barrier interface. In vitro BBB models described to date reproduce some aspects of BBB functionality, but also suffer from incomplete phenotypic expression of brain endothelial traits, difficulty in reproducibility and fabrication, or overall cost. To address these limitations, we describe a three-dimensional (3D) BBB model based on a hybrid paper/nanofiber scaffold. The cell culture platform utilizes lens paper as a framework to accommodate 3D culture of astrocytes. An electrospun nanofiber layer is coated onto one face of the paper to mimic the basement membrane and support growth of an organized two-dimensional layer of endothelial cells (ECs). Human induced pluripotent stem cell-derived ECs and astrocytes are co-cultured to develop a human BBB model. Morphological and spatial organization of model are validated with confocal microscopy. Measurements of transendothelial resistance and permeability demonstrate the BBB model develops a high-quality barrier and responds to hyperosmolar treatments. RNA-sequencing shows introduction of astrocytes both regulates EC tight junction proteins and improves endothelial phenotypes related to vasculogenesis. This model shows promise as a model platform for future in vitro studies of the BBB.
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Affiliation(s)
- Kaixiang Huang
- Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA
| | - Andre Castiaux
- Department of Chemistry and Center for Additive Manufacturing, Saint Louis University, 3501 Laclede Avenue, St. Louis, Missouri 63103, USA
| | - Ram Podicheti
- Center for Genomics and Bioinformatics, Indiana University Bloomington, 1001 East Third St., Bloomington, Indiana 47405, USA
| | - Douglas B Rusch
- Center for Genomics and Bioinformatics, Indiana University Bloomington, 1001 East Third St., Bloomington, Indiana 47405, USA
| | - R Scott Martin
- Department of Chemistry and Center for Additive Manufacturing, Saint Louis University, 3501 Laclede Avenue, St. Louis, Missouri 63103, USA
| | - Lane A Baker
- Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA
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Dabrowski W, Siwicka-Gieroba D, Robba C, Bielacz M, Sołek-Pastuszka J, Kotfis K, Bohatyrewicz R, Jaroszyński A, Malbrain MLNG, Badenes R. Potentially Detrimental Effects of Hyperosmolality in Patients Treated for Traumatic Brain Injury. J Clin Med 2021; 10:4141. [PMID: 34575255 PMCID: PMC8467376 DOI: 10.3390/jcm10184141] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 02/06/2023] Open
Abstract
Hyperosmotic therapy is commonly used to treat intracranial hypertension in traumatic brain injury patients. Unfortunately, hyperosmolality also affects other organs. An increase in plasma osmolality may impair kidney, cardiac, and immune function, and increase blood-brain barrier permeability. These effects are related not only to the type of hyperosmotic agents, but also to the level of hyperosmolality. The commonly recommended osmolality of 320 mOsm/kg H2O seems to be the maximum level, although an increase in plasma osmolality above 310 mOsm/kg H2O may already induce cardiac and immune system disorders. The present review focuses on the adverse effects of hyperosmolality on the function of various organs.
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Affiliation(s)
- Wojciech Dabrowski
- Department of Anaesthesiology and Intensive Care, Medical University of Lublin, 20-954 Lublin, Poland;
| | - Dorota Siwicka-Gieroba
- Department of Anaesthesiology and Intensive Care, Medical University of Lublin, 20-954 Lublin, Poland;
| | - Chiara Robba
- Department of Anaesthesia and Intensive Care, Policlinico San Martino, 16100 Genova, Italy;
| | - Magdalena Bielacz
- Institute of Tourism and Recreation, State Vocational College of Szymon Szymonowicz, 22-400 Zamosc, Poland;
| | - Joanna Sołek-Pastuszka
- Department of Anaesthesiology and Intensive Care, Pomeranian Medical University, 71-252 Szczecin, Poland; (J.S.-P.); (R.B.)
| | - Katarzyna Kotfis
- Department of Anaesthesiology, Intensive Therapy and Acute Intoxications, Pomeranian Medical University, 70-111 Szczecin, Poland;
| | - Romuald Bohatyrewicz
- Department of Anaesthesiology and Intensive Care, Pomeranian Medical University, 71-252 Szczecin, Poland; (J.S.-P.); (R.B.)
| | - Andrzej Jaroszyński
- Department of Nephrology, Institute of Medical Science, Jan Kochanowski University of Kielce, 25-736 Kielce, Poland;
| | - Manu L. N. G. Malbrain
- Department of Anaesthesiology and Intensive Care, Medical University of Lublin, 20-954 Lublin, Poland;
- International Fluid Academy, Dreef 3, 3360 Lovenjoel, Belgium
- Medical Department, AZ Jan Palfjin Hospital, Watersportlaan 5, 9000 Gent, Belgium
| | - Rafael Badenes
- Department of Anaesthesiology and Intensive Care, Hospital Clìnico Universitario de Valencia, University of Valencia, 46010 Valencia, Spain;
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8
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Sauna dehydration as a new physiological challenge model for intestinal barrier function. Sci Rep 2021; 11:15514. [PMID: 34330970 PMCID: PMC8324874 DOI: 10.1038/s41598-021-94814-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/16/2021] [Indexed: 12/15/2022] Open
Abstract
The intestinal barrier plays a crucial role in maintaining gut health, and an increased permeability has been linked to several intestinal and extra-intestinal disorders. There is an increasing demand for interventions aimed at strengthening this barrier and for in vivo challenge models to assess their efficiency. This study investigated the effect of sauna-induced dehydration on intestinal barrier function (clinicaltrials.gov: NCT03620825). Twenty healthy subjects underwent three conditions in random order: (1) Sauna dehydration (loss of 3% body weight), (2) non-steroidal anti-inflammatory drug (NSAID) intake, (3) negative control. Intestinal permeability was assessed by a multi-sugar urinary recovery test, while intestinal damage, bacterial translocation and cytokines were assessed by plasma markers. The sauna dehydration protocol resulted in an increase in gastroduodenal and small intestinal permeability. Presumably, this increase occurred without substantial damage to the enterocytes as plasma intestinal fatty acid-binding protein (I-FABP) and liver fatty acid-binding protein (L-FABP) were not affected. In addition, we observed significant increases in levels of lipopolysaccharide-binding protein (LBP), IL-6 and IL-8, while sCD14, IL-10, IFN-ɣ and TNF-α were not affected. These results suggest that sauna dehydration increased intestinal permeability and could be applied as a new physiological in vivo challenge model for intestinal barrier function.
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Cremin K, Jones BA, Teahan J, Meloni GN, Perry D, Zerfass C, Asally M, Soyer OS, Unwin PR. Scanning Ion Conductance Microscopy Reveals Differences in the Ionic Environments of Gram-Positive and Negative Bacteria. Anal Chem 2020; 92:16024-16032. [PMID: 33241929 DOI: 10.1021/acs.analchem.0c03653] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This paper reports on the use of scanning ion conductance microscopy (SICM) to locally map the ionic properties and charge environment of two live bacterial strains: the Gram-negative Escherichia coli and the Gram-positive Bacillus subtilis. SICM results find heterogeneities across the bacterial surface and significant differences among the Gram-positive and Gram-negative bacteria. The bioelectrical environment of the B. subtilis was found to be considerably more negatively charged compared to E. coli. SICM measurements, fitted to a simplified finite element method (FEM) model, revealed surface charge values of -80 to -140 mC m-2 for the Gram-negative E. coli. The Gram-positive B. subtilis show a much higher conductivity around the cell wall, and surface charge values between -350 and -450 mC m-2 were found using the same simplified model. SICM was also able to detect regions of high negative charge near B. subtilis, not detected in the topographical SICM response and attributed to the extracellular polymeric substance. To further explore how the B. subtilis cell wall structure can influence the SICM current response, a more comprehensive FEM model, accounting for the physical properties of the Gram-positive cell wall, was developed. The new model provides a more realistic description of the cell wall and allows investigation of the relation between its key properties and SICM currents, building foundations to further investigate and improve understanding of the Gram-positive cellular microenvironment.
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Affiliation(s)
- Kelsey Cremin
- Bio-Electrical Engineering Innovation Hub, University of Warwick, Coventry CV4 7AL, U.K.,Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.,Molecular Analytical Science Centre for Doctoral Training (MAS CDT), University of Warwick, Coventry CV4 7AL, U.K.,School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
| | - Bryn A Jones
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - James Teahan
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.,Molecular Analytical Science Centre for Doctoral Training (MAS CDT), University of Warwick, Coventry CV4 7AL, U.K
| | - Gabriel N Meloni
- Bio-Electrical Engineering Innovation Hub, University of Warwick, Coventry CV4 7AL, U.K.,Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - David Perry
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - Christian Zerfass
- Bio-Electrical Engineering Innovation Hub, University of Warwick, Coventry CV4 7AL, U.K.,School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
| | - Munehiro Asally
- Bio-Electrical Engineering Innovation Hub, University of Warwick, Coventry CV4 7AL, U.K.,School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
| | - Orkun S Soyer
- Bio-Electrical Engineering Innovation Hub, University of Warwick, Coventry CV4 7AL, U.K.,School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
| | - Patrick R Unwin
- Bio-Electrical Engineering Innovation Hub, University of Warwick, Coventry CV4 7AL, U.K.,Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
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