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Ebenuwa I, Violet PC, Tu H, Lee C, Munyan N, Wang Y, Niyyati M, Patra K, Wilkins KJ, Parrow N, Levine M. Altered RBC deformability in diabetes: clinical characteristics and RBC pathophysiology. Cardiovasc Diabetol 2024; 23:370. [PMID: 39425096 PMCID: PMC11490132 DOI: 10.1186/s12933-024-02453-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2024] [Accepted: 09/23/2024] [Indexed: 10/21/2024] Open
Abstract
BACKGROUND Reduced red blood cell deformability (RBCD) is associated with diabetic vascular complications, but early pathophysiological RBC changes and predictive demographic and clinical factors in populations with diabetes are unclear. An understanding of early diabetes-specific RBC changes associated with impaired RBCD is essential in investigating mechanisms that predispose to diabetic vascular complications. METHODS We conducted an outpatient cross-sectional study of participants in a well-controlled diabetes cohort (N81) and nondiabetic controls (N78) at the National Institutes of Health. First, between-group differences in RBCD measures were assessed with shear stress-gradient ektacytometry. Differences in structural RBC parameters were assessed using osmotic gradient ektacytometry and NaCl osmotic fragility. Functional RBC changes were assessed using hemoglobin-oxygen dissociation: p50. RESULTS All shear-stress gradient RBCD measures were significantly altered in the diabetes cohort vs. nondiabetic controls, even after adjustment for confounding covariates (p < 0.001). Adjusted for diabetes-status and demographic factors, significant predictors of reduced RBCD included older age, Black race, male gender, hyperglycemia, and vascular complications (all p < 0.05). Reduced RBCD was also associated with aberrant osmotic-gradient parameters, with a left-shift on osmotic gradient profile indicative of dehydrated RBCs in diabetes. A structure-function relationship was observed with reduced RBCD associated with reduced osmotic fragility (P < 0.001) and increased hemoglobin-oxygen dissociation (P < 0.01). CONCLUSIONS Findings suggest impaired RBCD incurs similar demographic and clinical risk factors as diabetic vascular disease, with early pathophysiological RBC changes indicative of disordered RBC hydration in diabetes. Findings provide strong evidence for disordered oxygen release as a functional consequence of reduced RBCD. CLINICAL TRIAL NUMBER NCT00071526.
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Affiliation(s)
- Ifechukwude Ebenuwa
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA.
| | - Pierre-Christian Violet
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Hongbin Tu
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Casey Lee
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Nicholas Munyan
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Yu Wang
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Mahtab Niyyati
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Kartick Patra
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Kenneth J Wilkins
- Biostatistics Program, Office of Clinical Research Support, Office of the Director, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Nermi Parrow
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Mark Levine
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA.
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Schofield J, Yong J, Toh CH. Revisiting the full blood count: Circulating blood cells and their role in coagulation. Br J Haematol 2024; 205:1269-1278. [PMID: 39111105 DOI: 10.1111/bjh.19690] [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: 05/16/2024] [Accepted: 07/25/2024] [Indexed: 10/18/2024]
Abstract
There has been an expansion in our understanding of the multifaceted roles of circulating blood cells in regulating haemostasis and contributing to thrombosis. Notably, there is greater recognition of the interplay between coagulation with inflammation and innate immune activation and the contribution of leucocytes. The full blood count (FBC) is a time-honoured test in medicine; however, its components are often viewed in isolation and without consideration of their haemostatic and thrombotic potential. Here, we review how the individual components of the FBC, that is, haemoglobin, platelets and leucocytes, engage with the haemostatic system and focus on both their quantitative and qualitative attributes. We also explore how this information can be harnessed into better management of people with multiple long-term conditions because of their higher risk of adverse clinical events.
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Affiliation(s)
- Jeremy Schofield
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
- Roald Dahl Haemostasis & Thrombosis Centre, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - Jun Yong
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
- Roald Dahl Haemostasis & Thrombosis Centre, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - Cheng-Hock Toh
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
- Roald Dahl Haemostasis & Thrombosis Centre, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
- Department of Haematology, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
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3
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Lee M, Park SH, Kim YJ, Bae JS, Lee JH, Lee SH, Kim C, Lee K, Kim Y. Impact of Systolic Blood Viscosity on Deep White Matter Hyperintensities in Patients With Acute Ischemic Stroke. J Am Heart Assoc 2024; 13:e034162. [PMID: 39041635 DOI: 10.1161/jaha.123.034162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 06/18/2024] [Indexed: 07/24/2024]
Abstract
BACKGROUND Elevated blood viscosity (BV), a critical determinant in blood rheology, is a contributing factor in cerebrovascular diseases. The specific influence of BV on small vessel disease burden remains unexplored. This study aims to examine the relationship between BV and regional white matter hyperintensity (WMH) volume in patients with acute ischemic stroke. METHODS AND RESULTS We enrolled a cohort of 302 patients with acute ischemic stroke or transient ischemic attack who were admitted to a hospital within 7 days of symptom onset in this study. We measured whole BV using a scanning capillary-tube viscometer and categorized systolic blood viscosity into 3 groups based on established references. We quantified and normalized WMH volumes using automated localization and segmentation software by NEUROPHET Inc. We performed multivariable logistic regression analysis to assess the correlation between systolic BV and WMH. The mean subject age was 66.7±13.4 years, and 38.7% (n=117) of the participants were female. Among a total of 302 patients, patients with higher deep WMH volume (T3) were typically older and had an atrial fibrillation, strokes of cardioembolic or undetermined cause, elevated levels of C-reactive protein, diastolic blood viscosity and systolic BV. A multivariable adjustment revealed a significant association between high systolic BV and increased deep-WMH volume (odds ratio [OR], 2.636 [95% CI, 1.225-5.673]). CONCLUSIONS Elevated systolic BV is more likely to be associated with deep WMH volume in patients with acute ischemic stroke or transient ischemic attack. These findings reveal novel therapeutic strategies focusing on blood rheology to enhance cerebral microcirculation in stroke management.
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Affiliation(s)
- Minwoo Lee
- Department of Neurology Hallym University Sacred Heart Hospital, Hallym University College of Medicine Anyang Republic of Korea
| | - Soo-Hyun Park
- Department of Neurology Soonchunhyang University Seoul Hospital Seoul Republic of Korea
| | - Yeo Jin Kim
- Department of Neurology, Kangdong Sacred Heart Hospital Hallym University College of Medicine Seoul Republic of Korea
| | - Jong Seok Bae
- Department of Neurology, Kangdong Sacred Heart Hospital Hallym University College of Medicine Seoul Republic of Korea
| | - Ju-Hun Lee
- Department of Neurology, Kangdong Sacred Heart Hospital Hallym University College of Medicine Seoul Republic of Korea
| | - Sang-Hwa Lee
- Department of Neurology Chuncheon Sacred Heart Hospital, Hallym University College of Medicine Chuncheon Republic of Korea
| | - Chulho Kim
- Department of Neurology Chuncheon Sacred Heart Hospital, Hallym University College of Medicine Chuncheon Republic of Korea
| | - Kijeong Lee
- Research Institute, NEUROPHET Inc Seoul Republic of Korea
| | - Yerim Kim
- Department of Neurology, Kangdong Sacred Heart Hospital Hallym University College of Medicine Seoul Republic of Korea
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Qiu M, Zhou X, Zippi M, Goyal H, Basharat Z, Jagielski M, Hong W. Comprehensive review on the pathogenesis of hypertriglyceridaemia-associated acute pancreatitis. Ann Med 2023; 55:2265939. [PMID: 37813108 PMCID: PMC10563627 DOI: 10.1080/07853890.2023.2265939] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 09/26/2023] [Indexed: 10/11/2023] Open
Abstract
It is well known, that the inflammatory process that characterizes acute pancreatitis (AP) can lead to both pancreatic damage and systemic inflammatory response syndrome (SIRS). During the last 20 years, there has been a growing incidence of episodes of acute pancreatitis associated with hypertriglyceridaemia (HTAP). This review provides an overview of triglyceride metabolism and the potential mechanisms that may contribute to developing or exacerbating HTAP. The article comprehensively discusses the various pathological roles of free fatty acid, inflammatory response mechanisms, the involvement of microcirculation, serum calcium overload, oxidative stress and the endoplasmic reticulum, genetic polymorphism, and gut microbiota, which are known to trigger or escalate this condition. Future perspectives on HTAP appear promising, with ongoing research focused on developing more specific and effective treatment strategies.
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Affiliation(s)
- Minhao Qiu
- Department of Gastroenterology and Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China
| | - Xiaoying Zhou
- Department of Gastroenterology and Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China
| | - Maddalena Zippi
- Unit of Gastroenterology and Digestive Endoscopy, Sandro Pertini Hospital, Rome, Italy
| | - Hemant Goyal
- Department of Surgery, University of TX Health Sciences Center, Houston, TX, United States
| | | | - Mateusz Jagielski
- Department of General, Gastroenterological and Oncological Surgery, Nicolaus Copernicus University in Toruń, Poland
| | - Wandong Hong
- Department of Gastroenterology and Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China
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5
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Kang YJ. Biomechanical Investigation of Red Cell Sedimentation Using Blood Shear Stress and Blood Flow Image in a Capillary Chip. MICROMACHINES 2023; 14:1594. [PMID: 37630130 PMCID: PMC10456426 DOI: 10.3390/mi14081594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/01/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023]
Abstract
Blood image intensity has been used to detect erythrocyte sedimentation rate (ESR). However, it does not give information on the biophysical properties of blood samples under continuous ESR. In this study, to quantify mechanical variations of blood under continuous ESR, blood shear stress and blood image intensity were obtained by analyzing blood flows in the capillary channel. A blood sample is loaded into a driving syringe to demonstrate the proposed method. The blood flow rate is set in a periodic on-off pattern. A blood sample is then supplied into a capillary chip, and microscopic blood images are captured at specific intervals. Blood shear stress is quantified from the interface of the bloodstream in the coflowing channel. τ0 is defined as the maximum shear stress obtained at the first period. Simultaneously, ESRτ is then obtained by analyzing temporal variations of blood shear stress for every on period. AII is evaluated by analyzing the temporal variation of blood image intensity for every off period. According to the experimental results, a shorter period of T = 4 min and no air cavity contributes to the high sensitivity of the two indices (ESRτ and AII). The τ0 exhibits substantial differences with respect to hematocrits (i.e., 30-50%) as well as diluents. The ESRτ and AII showed a reciprocal relationship with each other. Three suggested properties represented substantial differences for suspended blood samples (i.e., hardened red blood cells, different concentrations of dextran solution, and fibrinogen). In conclusion, the present method can detect variations in blood samples under continuous ESR effectively.
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Affiliation(s)
- Yang Jun Kang
- Department of Mechanical Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
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6
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Gimondi S, Ferreira H, Reis RL, Neves NM. Size-Dependent Polymeric Nanoparticle Distribution in a Static versus Dynamic Microfluidic Blood Vessel Model: Implications for Nanoparticle-Based Drug Delivery. ACS APPLIED NANO MATERIALS 2023; 6:7364-7374. [PMID: 37207132 PMCID: PMC10189782 DOI: 10.1021/acsanm.3c00481] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/06/2023] [Indexed: 05/21/2023]
Abstract
Nanoparticles (NPs) have been widely investigated in the nanomedicine field. One of the main challenges is to accurately predict the NP distribution and fate after administration. Microfluidic platforms acquired huge importance as tools to model the in vivo environment. In this study, we leveraged a microfluidic platform to produce FITC-labeled poly(lactide-co-glycolide)-block-poly(ethylene glycol) (PLGA-PEG) NPs with defined sizes of 30, 50, and 70 nm. The study aimed to compare the ability of NPs with differences of 20 nm in size to cross an endothelial barrier using static (Transwell inserts) and dynamic (microfluidic perfusion device) in vitro models. Our results evidence a size-dependent NP crossing in both models (30 > 50 > 70 nm) and highlight the bias deriving from the static model, which does not involve shear stresses. The permeation of each NP size was significantly higher in the static system than in the dynamic model at the earliest stages. However, it gradually decreased to levels comparable with those of the dynamic model. Overall, this work highlights clear differences in NP distribution over time in static versus dynamic conditions and distinct size-dependent patterns. These findings reinforce the need for accurate in vitro screening models that allow for more accurate predictions of in vivo performance.
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Affiliation(s)
- Sara Gimondi
- 3B’s
Research Group, I3Bs−Research Institute on Biomaterials, Biodegradables
and Biomimetics, University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering and
Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da
Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B’s−PT
Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Helena Ferreira
- 3B’s
Research Group, I3Bs−Research Institute on Biomaterials, Biodegradables
and Biomimetics, University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering and
Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da
Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B’s−PT
Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L. Reis
- 3B’s
Research Group, I3Bs−Research Institute on Biomaterials, Biodegradables
and Biomimetics, University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering and
Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da
Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B’s−PT
Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno M. Neves
- 3B’s
Research Group, I3Bs−Research Institute on Biomaterials, Biodegradables
and Biomimetics, University of Minho, Headquarters
of the European Institute of Excellence on Tissue Engineering and
Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da
Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B’s−PT
Government Associate Laboratory, Braga/Guimarães, Portugal
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7
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Scanning Electron and Atomic Force Microscopic Analysis of Erythrocytes in a Cohort of Atopic Asthma Patients—A Pilot Study. HEMATO 2023. [DOI: 10.3390/hemato4010009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Background: Non-communicable diseases are often associated with chronic inflammation, placing patients suffering from these conditions at a higher risk of thrombosis and other complications. The pathophysiology of asthma and/or atopic asthma is also linked to chronic inflammation, which consequently may alter blood parameters including erythrocyte structure and function. Methodology: The objective of this study was to evaluate differences in erythrocytes between patients with atopic asthma (n = 30) and healthy individuals (n = 30) by evaluating routine haematological parameters; structures and axial ratios of erythrocytes using light microscopy; erythrocyte membrane elasticity using atomic force microscopy; and erythrocyte ultrastructure using scanning electron microscopy. Results: The haematological findings of healthy participants and patients suffering from asthma were within normal clinical ranges together with significantly higher levels of circulating monocytes (p = 0.0066), erythrocytes (p = 0.0004), haemoglobin (p = 0.0057), and haematocrit (p = 0.0049) in asthma patients. The analysis of eosin-stained erythrocytes by light microscopy showed more echinocytes, acanthocytes, and ovalocytes compared to controls and a significant difference in axial ratios (p < 0.0001). Atomic force microscopy findings showed reduced erythrocyte membrane elasticity in asthmatic erythrocytes (p = 0.001). Ultrastructural differences in erythrocytes were visible in the asthma group compared to controls. Conclusion: Altered erythrocyte ultrastructural morphology and a significant change in the haematological profile are evident in atopic asthma and may influence common complications associated with asthma. The impact of these changes on the physiological mechanisms of coagulation and the pathophysiology of asthma needs to be further elucidated.
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Windberger U, Sparer A, Elsayad K. The role of plasma in the yield stress of blood. Clin Hemorheol Microcirc 2023; 84:369-383. [PMID: 37334582 DOI: 10.3233/ch-231701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
BACKGROUND Yielding and shear elasticity of blood are merely discussed within the context of hematocrit and erythrocyte aggregation. However, plasma might play a substantial role due its own viscoelasticity. OBJECTIVE If only erythrocyte aggregation and hematocrit would determine yielding, blood of different species with comparable values would present comparable yield stresses. METHODS rheometry (SAOS: amplitude and frequency sweep tests; flow curves) of hematocrit-matched samples at 37°C. Brillouin Light Scattering Spectroscopy at 38°C. RESULTS Yield stress for pig: 20mPa, rat: 18mPa, and human blood: 9mPa. Cow and sheep blood were not in quasi-stationary state supporting the role of erythrocyte aggregation for the development of elasticity and yielding. However, pig and human erythrocytes feature similar aggregability, but yield stress of porcine blood was double. Murine and ruminant erythrocytes both rarely aggregate, but their blood behavior was fundamentally different. Pig plasma was shear-thinning and murine plasma was platelet-enriched, supporting the role of plasma for triggering collective effects and gel-like properties. CONCLUSIONS Blood behavior near zero shear flow is not based solely on erythrocyte aggregation and hematocrit, but includes the hydrodynamic interaction with plasma. The shear stress required to break down elasticity is not the critical shear stress for dispersing erythrocyte aggregates, but the shear stress required to fracture the entire assembly of blood cells within their intimate embedding.
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Affiliation(s)
- U Windberger
- Core Facility Laboratory Animal Breeding and Husbandry, Decentralized Biomedical Facilities, Medical University Vienna, Austria
| | - A Sparer
- Core Facility Laboratory Animal Breeding and Husbandry, Decentralized Biomedical Facilities, Medical University Vienna, Austria
| | - K Elsayad
- Division of Anatomy, Center for Anatomy and Cell Biology, Medical University Vienna, Austria
- Medical Imaging Cluster (MIC), Medical University of Vienna, Austria
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Kang YJ. Biosensing of Haemorheological Properties Using Microblood Flow Manipulation and Quantification. SENSORS (BASEL, SWITZERLAND) 2022; 23:408. [PMID: 36617006 PMCID: PMC9823650 DOI: 10.3390/s23010408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/26/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
The biomechanical properties of blood have been used to detect haematological diseases and disorders. The simultaneous measurement of multiple haemorheological properties has been considered an important aspect for separating the individual contributions of red blood cells (RBCs) and plasma. In this study, three haemorheological properties (viscosity, time constant, and RBC aggregation) were obtained by analysing blood flow, which was set to a square-wave profile (steady and transient flow). Based on a simplified differential equation derived using a discrete circuit model, the time constant for viscoelasticity was obtained by solving the governing equation rather than using the curve-fitting technique. The time constant (λ) varies linearly with respect to the interface in the coflowing channel (β). Two parameters (i.e., average value: <λ>, linear slope: dλdβ) were newly suggested to effectively represent linearly varying time constant. <λ> exhibited more consistent results than dλdβ. To detect variations in the haematocrit in blood, we observed that the blood viscosity (i.e., steady flow) is better than the time constant (i.e., transient flow). The blood viscosity and time constant exhibited significant differences for the hardened RBCs. The present method was then successfully employed to detect continuously varying haematocrit resulting from RBC sedimentation in a driving syringe. The present method can consistently detect variations in blood in terms of the three haemorheological properties.
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Affiliation(s)
- Yang Jun Kang
- Department of Mechanical Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
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de Graaf MNS, Vivas A, Kasi DG, van den Hil FE, van den Berg A, van der Meer AD, Mummery CL, Orlova VV. Multiplexed fluidic circuit board for controlled perfusion of 3D blood vessels-on-a-chip. LAB ON A CHIP 2022; 23:168-181. [PMID: 36484766 PMCID: PMC9764810 DOI: 10.1039/d2lc00686c] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 10/21/2022] [Indexed: 06/11/2023]
Abstract
Three-dimensional (3D) blood vessels-on-a-chip (VoC) models integrate the biological complexity of vessel walls with dynamic microenvironmental cues, such as wall shear stress (WSS) and circumferential strain (CS). However, these parameters are difficult to control and are often poorly reproducible due to the high intrinsic diameter variation of individual 3D-VoCs. As a result, the throughput of current 3D systems is one-channel-at-a-time. Here, we developed a fluidic circuit board (FCB) for simultaneous perfusion of up to twelve 3D-VoCs using a single set of control parameters. By designing the internal hydraulic resistances in the FCB appropriately, it was possible to provide a pre-set WSS to all connected 3D-VoCs, despite significant variation in lumen diameters. Using this FCB, we found that variation of CS or WSS induce morphological changes to human induced pluripotent stem cell (hiPSC)-derived endothelial cells (ECs) and conclude that control of these parameters using a FCB is necessary to study 3D-VOCs.
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Affiliation(s)
- Mees N S de Graaf
- Department of Anatomy and Embryology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands.
| | - Aisen Vivas
- Applied Stem Cell Technologies, University of Twente, 7500AE Enschede, The Netherlands
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, Technical Medical Centre, Max Planck Institute for Complex Fluid Dynamics, University of Twente, 7500AE Enschede, The Netherlands
| | - Dhanesh G Kasi
- Department of Anatomy and Embryology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands.
- Department of Human Genetics, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
- Department of Neurology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Francijna E van den Hil
- Department of Anatomy and Embryology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands.
| | - Albert van den Berg
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, Technical Medical Centre, Max Planck Institute for Complex Fluid Dynamics, University of Twente, 7500AE Enschede, The Netherlands
| | | | - Christine L Mummery
- Department of Anatomy and Embryology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands.
- Applied Stem Cell Technologies, University of Twente, 7500AE Enschede, The Netherlands
| | - Valeria V Orlova
- Department of Anatomy and Embryology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands.
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Yi HJ, Shin DS, Kim BT. Elevated blood viscosity is associated with delayed cerebral ischemia in patients with aneurysmal subarachnoid hemorrhage. J Stroke Cerebrovasc Dis 2022; 31:106732. [DOI: 10.1016/j.jstrokecerebrovasdis.2022.106732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/28/2022] [Accepted: 08/14/2022] [Indexed: 11/21/2022] Open
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van Dorth D, Venugopal K, Poot DHJ, Hirschler L, de Bresser J, Smits M, Hernandez‐Tamames JA, Debacker CS, van Osch MJP. Dependency of R 2 and R 2 * relaxation on Gd-DTPA concentration in arterial blood: Influence of hematocrit and magnetic field strength. NMR IN BIOMEDICINE 2022; 35:e4653. [PMID: 34816501 PMCID: PMC9285940 DOI: 10.1002/nbm.4653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 06/13/2023]
Abstract
Dynamic susceptibility contrast (DSC) MRI is clinically used to measure brain perfusion by monitoring the dynamic passage of a bolus of contrast agent through the brain. For quantitative analysis of the DSC images, the arterial input function is required. It is known that the original assumption of a linear relation between the R2(*) relaxation and the arterial contrast agent concentration is invalid, although the exact relation is as of yet unknown. Studying this relation in vitro is time-consuming, because of the widespread variations in field strengths, MRI sequences, contrast agents, and physiological conditions. This study aims to simulate the R2(*) versus contrast concentration relation under varying physiological and technical conditions using an adapted version of an open-source simulation tool. The approach was validated with previously acquired data in human whole blood at 1.5 T by means of a gradient-echo sequence (proof-of-concept). Subsequently, the impact of hematocrit, field strength, and oxygen saturation on this relation was studied for both gradient-echo and spin-echo sequences. The results show that for both gradient-echo and spin-echo sequences, the relaxivity increases with hematocrit and field strength, while the hematocrit dependency was nonlinear for both types of MRI sequences. By contrast, oxygen saturation has only a minor effect. In conclusion, the simulation setup has proven to be an efficient method to rapidly calibrate and estimate the relation between R2(*) and gadolinium concentration in whole blood. This knowledge will be useful in future clinical work to more accurately retrieve quantitative information on brain perfusion.
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Affiliation(s)
- Daniëlle van Dorth
- C. J. Gorter Center for High‐Field MRI, Department of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Krishnapriya Venugopal
- Department of Radiology and Nuclear MedicineErasmus MCUniversity Medical Center RotterdamRotterdamThe Netherlands
| | - Dirk H. J. Poot
- Department of Radiology and Nuclear MedicineErasmus MCUniversity Medical Center RotterdamRotterdamThe Netherlands
| | - Lydiane Hirschler
- C. J. Gorter Center for High‐Field MRI, Department of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Jeroen de Bresser
- Department of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Marion Smits
- Department of Radiology and Nuclear MedicineErasmus MCUniversity Medical Center RotterdamRotterdamThe Netherlands
| | - Juan A. Hernandez‐Tamames
- Department of Radiology and Nuclear MedicineErasmus MCUniversity Medical Center RotterdamRotterdamThe Netherlands
| | - Clément S. Debacker
- GHU ParisInstitut de Psychiatrie et Neurosciences, Hôpital Sainte‐AnneParisFrance
| | - Matthias J. P. van Osch
- C. J. Gorter Center for High‐Field MRI, Department of RadiologyLeiden University Medical CenterLeidenThe Netherlands
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13
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Abstract
OBJECTIVES The purpose of our study is to investigate the efficacy and safety of blood purification (BP) therapy in hypertriglyceridemia-induced acute pancreatitis. METHODS We searched PubMed, Embase, Cochrane Library, and Web of Science databases for articles published. RESULTS The analysis included 13 studies with 934 patients (263 in BP group, 671 in control group). There was no difference in efficacy and safety between the BP group and the control group (all P > 0.05). Compared with conventional treatment, BP had shorter hospital stay (mean difference, -4.96; 95% confidence interval [CI], -8.81 to -1.11; P = 0.01) in the case of similar mortality and complications. Meanwhile, insulin treatment showed similar mortality to BP, but fewer local complications (odds risk, 2.18; 95% CI, 1.13-4.20; P = 0.02) and shorter hospital stay (mean difference, 5.46; 95% CI, 0.64-10.29; P = 0.03). CONCLUSIONS In the treatment of hypertriglyceridemia-induced acute pancreatitis, BP methods are effective in accelerating triglyceride level reduction and shortening hospital stay but do not affect the efficacy or reduce mortality significantly compared with conventional treatment. Insulin therapy has the same effect as BP but decreases incidence of complications and cost.
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14
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Huamaní C, Sarmiento W, Cordova-Heredia G, Cruz-Huanca L, Damian-Saavedra P, Antonio D. Prediction of Blood Viscosity Based on Usual Hematological Parameters in a Clinically Healthy Population Living in a High-Altitude City. High Alt Med Biol 2022; 23:78-84. [PMID: 35271375 DOI: 10.1089/ham.2021.0165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Huamaní, Charles, William Sarmiento, Golda Córdova-Heredia, Luz Cruz-Huanca, Paulina Damián-Saavedra, and Dario Antonio. Prediction of blood viscosity based on usual hematological parameters in a clinically healthy population living in a high-altitude city. High Alt Med Biol. 23:78-84, 2022. Background and Aims: Variations in blood viscosity are mainly determined by the hematocrit level, but in residents of high-altitude cities, the hemoglobin levels and blood viscosity values are often high. We aimed to determine the blood viscosity values in clinically healthy chronic hypoxia-acclimatized individuals and establish a predictive model based on the hematocrit level and other common hematological parameters. Methods: A prospective observational study was conducted in asymptomatic young adults living in Cusco (a city located at 3,399 m). Venous blood samples were collected to determine the hemoglobin, hematocrit, and albumin and serum protein levels and blood viscosity values. Results: Altogether, 253 volunteers were included, of whom 147 (58.1%) were women. The hematological values were mean values of hemoglobin, 16.32 ± 2.0 g/dl; hematocrit, 48.12% ± 5.24%; triglycerides, 130.68 ± 90.64 mg/dl; globulin, 3.07 ± 0.36 g/dl; and mean blood viscosity, 6.17 ± 0.94 centipoises. The prediction model with the highest explained variance (R2 = 68.07%) and parsimony conservation comprised hematocrit, globulin, and triglycerides [blood viscosity = hematocrit × (0.176) + globulin × (0.595) + triglycerides × (1.77/1,000) - 4.13]. Conclusions: In a population living at high altitude, the blood viscosity level is extremely high and mainly determined by the hematocrit level. This population has chronic high blood viscosity levels, which can be predicted using other blood elements.
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Affiliation(s)
- Charles Huamaní
- Universidad Andina del Cusco, Cusco, Perú
- Hospital Nacional Adolfo Guevara Velasco, Cusco, Perú
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15
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van Batenburg-Sherwood J, Balabani S. Continuum microhaemodynamics modelling using inverse rheology. Biomech Model Mechanobiol 2022; 21:335-361. [PMID: 34907491 PMCID: PMC8807439 DOI: 10.1007/s10237-021-01537-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 11/23/2021] [Indexed: 11/03/2022]
Abstract
Modelling blood flow in microvascular networks is challenging due to the complex nature of haemorheology. Zero- and one-dimensional approaches cannot reproduce local haemodynamics, and models that consider individual red blood cells (RBCs) are prohibitively computationally expensive. Continuum approaches could provide an efficient solution, but dependence on a large parameter space and scarcity of experimental data for validation has limited their application. We describe a method to assimilate experimental RBC velocity and concentration data into a continuum numerical modelling framework. Imaging data of RBCs were acquired in a sequentially bifurcating microchannel for various flow conditions. RBC concentration distributions were evaluated and mapped into computational fluid dynamics simulations with rheology prescribed by the Quemada model. Predicted velocities were compared to particle image velocimetry data. A subset of cases was used for parameter optimisation, and the resulting model was applied to a wider data set to evaluate model efficacy. The pre-optimised model reduced errors in predicted velocity by 60% compared to assuming a Newtonian fluid, and optimisation further reduced errors by 40%. Asymmetry of RBC velocity and concentration profiles was demonstrated to play a critical role. Excluding asymmetry in the RBC concentration doubled the error, but excluding spatial distributions of shear rate had little effect. This study demonstrates that a continuum model with optimised rheological parameters can reproduce measured velocity if RBC concentration distributions are known a priori. Developing this approach for RBC transport with more network configurations has the potential to provide an efficient approach for modelling network-scale haemodynamics.
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Affiliation(s)
| | - Stavroula Balabani
- Department of Mechanical Engineering, University College London, London, UK
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16
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Effects of Thyroid Hormone on Tissue Hypoxia: Relevance to Sepsis Therapy. J Clin Med 2021; 10:jcm10245855. [PMID: 34945151 PMCID: PMC8703810 DOI: 10.3390/jcm10245855] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/29/2021] [Accepted: 12/10/2021] [Indexed: 01/14/2023] Open
Abstract
Tissue hypoxia occurs in various conditions such as myocardial or brain ischemia and infarction, sepsis, and trauma, and induces cellular damage and tissue remodeling with recapitulation of fetal-like reprogramming, which eventually results in organ failure. Analogies seem to exist between the damaged hypoxic and developing organs, indicating that a regulatory network which drives embryonic organ development may control aspects of heart (or tissue) repair. In this context, thyroid hormone (TH), which is a critical regulator of organ maturation, physiologic angiogenesis, and mitochondrial biogenesis during fetal development, may be of important physiological relevance upon stress (hypoxia)-induced fetal reprogramming. TH signaling has been implicated in hypoxic tissue remodeling after myocardial infarction and T3 prevents remodeling of the postinfarcted heart. Similarly, preliminary experimental evidence suggests that T3 can prevent early tissue hypoxia during sepsis with important physiological consequences. Thus, based on common pathways between different paradigms, we propose a possible role of TH in tissue hypoxia after sepsis with the potential to reduce secondary organ failure.
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17
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Quantitative Monitoring of Dynamic Blood Flows Using Coflowing Laminar Streams in a Sensorless Approach. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11167260] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Determination of blood viscosity requires consistent measurement of blood flow rates, which leads to measurement errors and presents several issues when there are continuous changes in hematocrit changes. Instead of blood viscosity, a coflowing channel as a pressure sensor is adopted to quantify the dynamic flow of blood. Information on blood (i.e., hematocrit, flow rate, and viscosity) is not provided in advance. Using a discrete circuit model for the coflowing streams, the analytical expressions for four properties (i.e., pressure, shear stress, and two types of work) are then derived to quantify the flow of the test fluid. The analytical expressions are validated through numerical simulations. To demonstrate the method, the four properties are obtained using the present method by varying the flow patterns (i.e., constant flow rate or sinusoidal flow rate) as well as test fluids (i.e., glycerin solutions and blood). Thereafter, the present method is applied to quantify the dynamic flows of RBC aggregation-enhanced blood with a peristaltic pump, where any information regarding the blood is not specific. The experimental results indicate that the present method can quantify dynamic blood flow consistently, where hematocrit changes continuously over time.
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18
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Hindel S, Heuchel L, Lüdemann L. Fractional calculus tracer kinetic compartment model for quantification of microvascular perfusion. Physiol Meas 2021; 42. [PMID: 34049294 DOI: 10.1088/1361-6579/ac067c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 05/26/2021] [Indexed: 11/11/2022]
Abstract
Objective. We evaluate a tracer kinetic model for quantification of physiological perfusion and microvascular residue time kurtosis (RTK) in skeletal muscle vasculature with first pass bolus experiments in dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI).Approach. A decreasing stretched Mittag-Leffler function (f1C model) was obtained as the impulse response solution of a rate equation of real-valued ('fractional') derivation order. The method was validated in skeletal muscle in the lower limb of seven female pigs examined by DCE-MRI. Dynamic imaging during blood pool contrast agent elimination was performed using a 3D gradient echo sequence with k-space sharing. Blood flow was augmented by continuous infusion of the vasodilator adenosine into the femoral artery increasing blood flow up to four times. Blood flow measured by a Doppler flow probe placed at the femoral artery served as ground truth.Main results. Goodness of fit and correlation with the Doppler measurements,r= 0.80 (P< 0.001), of the 4-parameter f1C model was comparable with the results obtained with a previously tested 6-parameter two-compartment (2C) model. The derivation orderαof the f1C model can be interpreted as a measure of microvascular RTK. With increasing blood flow,αdropped significantly, leading to an increase in RTK.Significance. The f1C model is a practical approach based on hemodynamic principles to quantify physiological microvascular perfusion but it is impaired due to its compartmental nature.
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Affiliation(s)
- Stefan Hindel
- Department of Radiotherapy, Medical Physics section, University Hospital Essen, Essen, North Rhine-Westphalia, Germany.,Faculty of Physics, Technische Universität Kaiserslautern, Kaiserslautern, Rhineland-Palatinate, Germany
| | - Lena Heuchel
- Faculty of Physics, Technische Universität Dortmund, Dortmund, North Rhine-Westphalia, Germany
| | - Lutz Lüdemann
- Department of Radiotherapy, Medical Physics section, University Hospital Essen, Essen, North Rhine-Westphalia, Germany
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19
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Song K, Yi HJ, Lee DH, Sung JH. Association of blood viscosity with first-pass reperfusion in mechanical thrombectomy for acute ischemic stroke. Clin Hemorheol Microcirc 2021; 77:233-244. [PMID: 33074222 DOI: 10.3233/ch-200979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Elevated blood viscosity has been reported as a risk factor for cerebrovascular disease. OBJECTIVE The relationship between blood viscosity and outcomes of mechanical thrombectomy (MT) for large artery occlusion (LAO) were investigated in the present study. METHODS A total of 238 patients were enrolled and systolic blood viscosity (SBV) and diastolic blood viscosity (DBV) were measured using the scanning capillary tube viscometer. Receiver operating characteristic (ROC) analysis was performed to specify the association of viscosity with the first-pass reperfusion (FPR). Multivariable and regression analyses were performed to evaluate the relationship of viscosity with FPR and various variables. RESULTS Based on ROC analysis, the best DBV cutoff value was 10.55 (cP). In multivariable analysis, high DBV was associated with FPR failure (odds ratio 2.82, 95% confidence interval 1.64-4.22; p = 0.001). Increased DVB could be associated with elevated SBV, hematocrit level, and blood urea nitrogen/creatinine ratio (p = <0.001, 0.004, and 0.002, respectively). CONCLUSIONS Elevated DBV was associated with FPR failure. Patients with high DBV had longer thrombus length and required more stent passages than patients with low DBV.
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Affiliation(s)
- Kyojun Song
- Department of Neurosurgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Neurosurgery, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ho Jun Yi
- Department of Neurosurgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Neurosurgery, Soonchunhyang University Bucheon Hospital, College of Medicine, Soonchunhyang University, Bucheon, Republic of Korea
| | - Dong Hoon Lee
- Department of Neurosurgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jae Hoon Sung
- Department of Neurosurgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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20
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Fukami H, Higa Y, Hisano T, Asano K, Hirata T, Nishibe S. A Review of Red Yeast Rice, a Traditional Fermented Food in Japan and East Asia: Its Characteristic Ingredients and Application in the Maintenance and Improvement of Health in Lipid Metabolism and the Circulatory System. Molecules 2021; 26:1619. [PMID: 33803982 PMCID: PMC8001704 DOI: 10.3390/molecules26061619] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/01/2021] [Accepted: 02/05/2021] [Indexed: 01/25/2023] Open
Abstract
Red yeast rice has been used to produce alcoholic beverages and various fermented foods in China and Korea since ancient times; it has also been used to produce tofuyo (Okinawan-style fermented tofu) in Japan since the 18th century. Recently, monacolin K (lovastatin) which has cholesterol-lowering effects, was found in some strains of Monascus fungi. Since statins have been used world-wide as a cholesterol-lowering agent, processed foods containing natural statins are drawing attention as materials for primary prevention of life-style related diseases. In recent years, large-scale commercial production of red yeast rice using traditional solid-state fermentation has become possible, and various useful materials, including a variety of monascus pigments (polyketides) that spread as natural pigments, in addition to statins, are produced in the fermentation process. Red yeast rice has a lot of potential as a medicinal food. In this paper, we describe the history of red yeast rice as food, especially in Japan and East Asia, its production methods, use, and the ingredients with pharmacological activity. We then review evidence of the beneficial effects of red yeast rice in improving lipid metabolism and the circulatory system and its safety as a functional food.
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Affiliation(s)
- Hiroyuki Fukami
- Central R&D Laboratory, KOBYASHI Pharmaceutical Co., Ltd., Ibaraki 567-0057, Japan; (Y.H.); (T.H.); (K.A.); (T.H.)
| | - Yuki Higa
- Central R&D Laboratory, KOBYASHI Pharmaceutical Co., Ltd., Ibaraki 567-0057, Japan; (Y.H.); (T.H.); (K.A.); (T.H.)
| | - Tomohiro Hisano
- Central R&D Laboratory, KOBYASHI Pharmaceutical Co., Ltd., Ibaraki 567-0057, Japan; (Y.H.); (T.H.); (K.A.); (T.H.)
| | - Koichi Asano
- Central R&D Laboratory, KOBYASHI Pharmaceutical Co., Ltd., Ibaraki 567-0057, Japan; (Y.H.); (T.H.); (K.A.); (T.H.)
| | - Tetsuya Hirata
- Central R&D Laboratory, KOBYASHI Pharmaceutical Co., Ltd., Ibaraki 567-0057, Japan; (Y.H.); (T.H.); (K.A.); (T.H.)
| | - Sansei Nishibe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari 061-0293, Japan;
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21
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Hong H, Song JM, Yeom E. Micro-vibrational erythrocyte sedimentation rate (ESR) for sensitive measurement of erythrocyte aggregation. J Vis (Tokyo) 2021. [DOI: 10.1007/s12650-020-00728-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Gao JQ, Wang P, Yan JW, Ba LN, Shi PL, Wu HM, Guan XY, Cao YG, Sun HL, Mao XY. Shear Stress Rescued the Neuronal Impairment Induced by Global Cerebral Ischemia Reperfusion via Activating PECAM-1-eNOS-NO Pathway. Front Cell Dev Biol 2021; 8:631286. [PMID: 33553171 PMCID: PMC7859356 DOI: 10.3389/fcell.2020.631286] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 12/30/2020] [Indexed: 12/17/2022] Open
Abstract
Microvessel hypoperfusion following ischemic stress resulted in a decreased shear stress of brain microvascular endothelial cells (BMECs) and contributed to abnormal expression of PECAM-1 after global cerebral ischemia/reperfusion (I/R) injury. Here, we identified novel pathophysiologic and rehabilitative procedures specific to shear stress in microvascular endothelial cells in response to global cerebral I/R injury. We found that the decrease in cerebral blood flow of gerbils after global cerebral I/R injury reduces shear stress, and the abnormal change in shear stress leads to microvascular endothelial cell and neuron damage. Nevertheless, suitable high levels of shear stress contribute to rescuing the dysfunction and malformation of BMECs via regulating the PECAM-1-eNOS-NO pathway to enhance nitric oxide release, decrease the expression of caspase-3 to reduce apoptosis, and improve the shear-adaptability of endothelial cells, thereby playing a protective role in the gerbil brain.
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Affiliation(s)
- Jing-Quan Gao
- Department of Nursing, Harbin Medical University-Daqing, Daqing, China
| | - Peng Wang
- Department of Physiology, Harbin Medical University-Daqing, Daqing, China
| | - Jun-Wei Yan
- Department of Vascular Surgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Li-Na Ba
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, China
| | - Pi-Long Shi
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, China
| | - Hong-Mei Wu
- Department of Nursing, Harbin Medical University-Daqing, Daqing, China
| | - Xue-Ying Guan
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, China
| | - Yong-Gang Cao
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, China
| | - Hong-Li Sun
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, China
| | - Xiao-Yuan Mao
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Central South University, Changsha, China
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23
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Prokudina ES, Kurbatov BK, Zavadovsky KV, Vrublevsky AV, Naryzhnaya NV, Lishmanov YB, Maslov LN, Oeltgen PR. Takotsubo Syndrome: Clinical Manifestations, Etiology and Pathogenesis. Curr Cardiol Rev 2021; 17:188-203. [PMID: 31995013 PMCID: PMC8226199 DOI: 10.2174/1573403x16666200129114330] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/02/2019] [Accepted: 12/12/2019] [Indexed: 12/15/2022] Open
Abstract
The purpose of the review is the analysis of clinical and experimental data on the etiology and pathogenesis of takotsubo syndrome (TS). TS is characterized by contractile dysfunction, which usually affects the apical region of the heart without obstruction of coronary artery, moderate increase in myocardial necrosis markers, prolonged QTc interval (in 50% of patients), sometimes elevation of ST segment (in 19% of patients), increase N-Terminal Pro-B-Type Natriuretic Peptide level, microvascular dysfunction, sometimes spasm of the epicardial coronary arteries (in 10% of patients), myocardial edema, and life-threatening ventricular arrhythmias (in 11% of patients). Stress cardiomyopathy is a rare disease, it is observed in 0.6 - 2.5% of patients with acute coronary syndrome. The occurrence of takotsubo syndrome is 9 times higher in women, who are aged 60-70 years old, than in men. The hospital mortality among patients with TS corresponds to 3.5% - 12%. Physical or emotional stress do not precede disease in all patients with TS. Most of patients with TS have neurological or mental illnesses. The level of catecholamines is increased in patients with TS, therefore, the occurrence of TS is associated with excessive activation of the adrenergic system. The negative inotropic effect of catecholamines is associated with the activation of β2 adrenergic receptors. An important role of the adrenergic system in the pathogenesis of TS is confirmed by studies which were performed using 125I-metaiodobenzylguanidine (125I -MIBG). TS causes edema and inflammation of the myocardium. The inflammatory response in TS is systemic. TS causes impaired coronary microcirculation and reduces coronary reserve. There is a reason to believe that an increase in blood viscosity may play an important role in the pathogenesis of microcirculatory dysfunction in patients with TS. Epicardial coronary artery spasm is not obligatory for the occurrence of TS. Cortisol, endothelin-1 and microRNAs are challengers for the role of TS triggers. A decrease in estrogen levels is a factor contributing to the onset of TS. The central nervous system appears to play an important role in the pathogenesis of TS.
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Affiliation(s)
- Ekaterina S Prokudina
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Center of the RAS, Tomsk, Russian Federation
| | - Boris K Kurbatov
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Center of the RAS, Tomsk, Russian Federation
| | - Konstantin V Zavadovsky
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Center of the RAS, Tomsk, Russian Federation
| | - Alexander V Vrublevsky
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Center of the RAS, Tomsk, Russian Federation
| | - Natalia V Naryzhnaya
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Center of the RAS, Tomsk, Russian Federation
| | - Yuri B Lishmanov
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Center of the RAS, Tomsk, Russian Federation
| | - Leonid N Maslov
- Laboratory of Experimental Cardiology, Cardiology Research Institute, Tomsk National Research Medical Center of the RAS, Tomsk, Russian Federation
| | - Peter R Oeltgen
- Department of Pathology, University of Kentucky College of Medicine, Lexington, KY 40506, United States
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24
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Kim YK, Lim YT, Suh JS, Hah JO, Lee JM. Erythrocyte deformability reduction in various pediatric hematologic diseases. Clin Hemorheol Microcirc 2020; 75:361-367. [PMID: 32224530 DOI: 10.3233/ch-200817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Previously, hemorheology studies using Rheoscan mainly focused on chronic kidney disease, cardiovascular disease, and endocrine disease in adults. The study using LORCA focused on erythrocyte disease. There were no studies using Rheoscan in children. OBJECTIVE We aimed to investigate erythrocyte deformability among various hematologic diseases occurring in children, namely, iron deficiency anemia (IDA), hereditary spherocytosis (HS), immune thrombocytopenia (ITP), and aplastic anemia (AA). METHODS Differences between those with HS, IDA, ITP, AA and healthy controls were compared among 43 patients, comprising 7 patients with HS, 8 patients with IDA, 6 patients with AA, 9 patients with ITP, and 13 healthy controls. Erythrocyte deformability was measured using a microfluidic ektacytometer (RheoScan-D, RheoMeditech, Seoul, Korea). The erythrocyte elongation index (EI) was defined as (L - W)/(L + W), where L and W are the major and minor axes of the ellipse, respectively. RESULTS The EI values of IDA, HS and AA were significantly decreased compared with healthy controls, but those of ITP were similar to healthy controls. CONCLUSIONS This study showed that erythrocyte deformability differed among various hematologic diseases. Further study concerning correlation in relation to the diagnostic and prognostic significance of erythrocyte deformability in hematologic disease is needed.
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Affiliation(s)
- Yu Kyung Kim
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Young Tae Lim
- Department of Pediatrics, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Jang Soo Suh
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jeong Ok Hah
- Department of Pediatrics, Daegu Fatima Hospital, Daegu, Republic of Korea
| | - Jae Min Lee
- Department of Pediatrics, Yeungnam University College of Medicine, Daegu, Republic of Korea
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25
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Giannokostas K, Moschopoulos P, Varchanis S, Dimakopoulos Y, Tsamopoulos J. Advanced Constitutive Modeling of the Thixotropic Elasto-Visco-Plastic Behavior of Blood: Description of the Model and Rheological Predictions. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4184. [PMID: 32962308 PMCID: PMC7560465 DOI: 10.3390/ma13184184] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 01/22/2023]
Abstract
This work focuses on the advanced modeling of the thixotropic nature of blood, coupled with an elasto-visco-plastic formulation by invoking a consistent and validated model for TEVP materials. The proposed model has been verified for the adequate description of the rheological behavior of suspensions, introducing a scalar variable that describes dynamically the level of internal microstructure of rouleaux at any instance, capturing accurately the aggregation and disaggregation mechanisms of the RBCs. Also, a non-linear fitting is adopted for the definition of the model's parameters on limited available experimental data of steady and transient rheometric flows of blood samples. We present the predictability of the new model in various steady and transient rheometric flows, including startup shear, rectangular shear steps, shear cessation, triangular shear steps and LAOS tests. Our model provides predictions for the elasto-thixotropic mechanism in startup shear flows, demonstrating a non-monotonic relationship of the thixotropic index on the shear-rate. The intermittent shear step test reveals the dynamics of the structural reconstruction, which in turn is associated with the aggregation process. Moreover, our model offers robust predictions for less examined tests such as uniaxial elongation, in which normal stress was found to have considerable contribution. Apart from the integrated modeling of blood rheological complexity, our implementation is adequate for multi-dimensional simulations due to its tensorial formalism accomplished with a single time scale for the thixotropic effects, resulting in a low computational cost compared to other TEVP models.
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Affiliation(s)
| | | | | | - Yannis Dimakopoulos
- Laboratory of Fluid Mechanics and Rheology, Department of Chemical Engineering, University of Patras, 26504 Patras, Greece; (K.G.); (P.M.); (S.V.); (J.T.)
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26
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Improved Erythrocyte Deformability Induced by Sodium-Glucose Cotransporter 2 Inhibitors in Type 2 Diabetic Patients. Cardiovasc Drugs Ther 2020; 36:59-67. [PMID: 32886218 DOI: 10.1007/s10557-020-07067-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/27/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE Sodium-glucose cotransporter 2 (SGLT-2) inhibitors are antidiabetic drugs that improve cardiovascular outcomes. Hemoglobin and hematocrit values increase after SGLT-2 inhibitor administration. Although these factors increase blood viscosity and the risk of cardiovascular disease, SGLT-2 inhibitors have protective effects on the cardiovascular system. The mechanisms for this paradoxical phenomenon remain unclear, and the effect of SGLT-2 inhibitors on hemorheology has not been studied. METHODS We evaluated the hemorheological parameters of 63 patients of whom 38 received metformin with a dipeptidyl peptidase 4 (DPP-4) inhibitor, while 25 received metformin with SGLT-2 inhibitor. Blood viscosity was measured using a cone-and-plate viscometer, erythrocyte aggregation was measured using a modified erythrocyte sedimentation rate method, and erythrocyte membrane fluctuation was measured as deformability, using a diffraction optical tomography. RESULTS Both blood viscosity and erythrocyte aggregation increased in the SGLT-2 inhibitor group, although erythrocyte deformability was significantly improved compared with that of the DPP-4 inhibitor group (DPP-4 inhibitor 43.71 ± 5.13 nm; SGLT-2 inhibitor 53.88 ± 4.88 nm; p < 0.001). When the two groups were compared after propensity score matching, no differences in blood viscosity at high shear rates and erythrocyte aggregation were observed, although erythrocyte deformability was significantly improved in the SGLT-2 inhibitor group (DPP-4 inhibitor 45.01 ± 5.28 nm; SGLT-2 inhibitor 53.14 ± 4.72 nm; p = 0.001). CONCLUSION This study demonstrates that erythrocyte deformability was improved in the SGLT-2 inhibitor group compared with that in the DPP-4 inhibitor group. This improvement in erythrocyte deformability is expected to have a protective effect on the cardiovascular system.
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Jackson BS, Nunes Goncalves J, Pretorius E. Comparison of pathological clotting using haematological, functional and morphological investigations in HIV-positive and HIV-negative patients with deep vein thrombosis. Retrovirology 2020; 17:14. [PMID: 32571345 PMCID: PMC7310079 DOI: 10.1186/s12977-020-00523-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 06/16/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Patients infected with the human immunodeficiency virus (HIV) are more prone to systemic inflammation and pathological clotting, and many may develop deep vein thrombosis (DVT) as a result of this dysregulated inflammatory profile. Coagulation tests are not routinely performed unless there is a specific reason. METHODS We recruited ten healthy control subjects, 35 HIV negative patients with deep vein thrombosis (HIV negative-DVT), and 13 HIV patients with DVT (HIV positive-DVT) on the primary antiretroviral therapy (ARV) regimen-emtricitabine, tenofovir and efavirenz. Serum inflammatory markers, haematological results, viscoelastic properties using thromboelastography (TEG) and scanning electron microscopy (SEM) of whole blood (WB) were used to compare the groups. RESULTS The DVT patients (HIV positive and HIV negative) had raised inflammatory markers. The HIV positive-DVT group had anaemia in keeping with anaemia of chronic disorders. DVT patients had a hypercoagulable profile on the TEG but no significant difference between HIV negative-DVT and HIV positive-DVT groups. The TEG analysis compared well and supported our ultrastructural results. Scanning electron microscopy of DVT patient's red blood cells (RBCs) and platelets demonstrated inflammatory changes including abnormal cell shapes, irregular membranes and microparticle formation. All the ultrastructural changes were more prominent in the HIV positive-DVT patients. CONCLUSIONS Although there were trends that HIV-positive patients were more hypercoagulable on functional tests (viscoelastic profile) compared to HIV-negative patients, there were no significant differences between the 2 groups. The sample size was, however, small in number. Morphologically there were inflammatory changes in patients with DVT. These ultrastructural changes, specifically with regard to platelets, appear more pronounced in HIV-positive patients which may contribute to increased risk for hypercoagulability and deep vein thrombosis.
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Affiliation(s)
- Brandon S Jackson
- Department of Surgery, University of Pretoria, Pretoria, 0007, South Africa
| | | | - Etheresia Pretorius
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch, Private Bag X1 Matieland, 7602, South Africa.
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Stauffer E, Loyrion E, Hancco I, Waltz X, Ulliel‐Roche M, Oberholzer L, Robach P, Pichon A, Brugniaux JV, Bouzat P, Doutreleau S, Connes P, Verges S. Blood viscosity and its determinants in the highest city in the world. J Physiol 2020; 598:4121-4130. [DOI: 10.1113/jp279694] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 05/07/2020] [Indexed: 12/14/2022] Open
Affiliation(s)
- Emeric Stauffer
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424 Team ‘Biologie vasculaire et du globule rouge’ Université Claude Bernard Lyon 1 Université de Lyon France
- Laboratoire d'Excellence du Globule Rouge (Labex GR‐Ex) PRES Sorbonne Paris France
- Centre de Médecine du Sommeil et des Maladies Respiratoires Hospices Civils de Lyon Hôpital Croix Rousse Lyon France
| | - Emmanuelle Loyrion
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
| | - Ivan Hancco
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
| | - Xavier Waltz
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
| | - Mathilde Ulliel‐Roche
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
| | - Laura Oberholzer
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research Rigshospitalet University of Copenhagen Copenhagen Denmark
| | - Paul Robach
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
- National School for Mountain Sports Site of the National School for Skiing and Mountaineering (ENSA) Chamonix France
| | | | - Julien V. Brugniaux
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
| | - Pierre Bouzat
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
| | - Stéphane Doutreleau
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
| | - Philippe Connes
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424 Team ‘Biologie vasculaire et du globule rouge’ Université Claude Bernard Lyon 1 Université de Lyon France
- Laboratoire d'Excellence du Globule Rouge (Labex GR‐Ex) PRES Sorbonne Paris France
- Institut Universitaire de France Paris France
| | - Samuel Verges
- HP2 laboratory Université Grenoble Alpes, Inserm, CHU Grenoble Alpes, Faculté de Médecine Grenoble 38000 France
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van Dijk CGM, Brandt MM, Poulis N, Anten J, van der Moolen M, Kramer L, Homburg EFGA, Louzao-Martinez L, Pei J, Krebber MM, van Balkom BWM, de Graaf P, Duncker DJ, Verhaar MC, Luttge R, Cheng C. A new microfluidic model that allows monitoring of complex vascular structures and cell interactions in a 3D biological matrix. LAB ON A CHIP 2020; 20:1827-1844. [PMID: 32330215 DOI: 10.1039/d0lc00059k] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Microfluidic organ-on-a-chip designs are used to mimic human tissues, including the vasculature. Here we present a novel microfluidic device that allows the interaction of endothelial cells (ECs) with pericytes and the extracellular matrix (ECM) in full bio-matrix encased 3D vessel structures (neovessels) that can be subjected to continuous, unidirectional flow and perfusion with circulating immune cells. We designed a polydimethylsiloxane (PDMS) device with a reservoir for a 3D fibrinogen gel with pericytes. Open channels were created for ECs to form a monolayer. Controlled, continuous, and unidirectional flow was introduced via a pump system while the design facilitated 3D confocal imaging. In this vessel-on-a-chip system, ECs interact with pericytes to create a human cell derived blood vessel which maintains a perfusable lumen for up to 7 days. Dextran diffusion verified endothelial barrier function while demonstrating the beneficial role of supporting pericytes. Increased permeability after thrombin stimulation showed the capacity of the neovessels to show natural vascular response. Perfusion of neovessels with circulating THP-1 cells demonstrated this system as a valuable platform for assessing interaction between the endothelium and immune cells in response to TNFα. In conclusion: we created a novel vascular microfluidic device that facilitates the fabrication of an array of parallel soft-channel structures in ECM gel that develop into biologically functional neovessels without hard-scaffold support. This model provides a unique tool to conduct live in vitro imaging of the human vasculature during perfusion with circulating cells to mimic (disease) environments in a highly systematic but freely configurable manner.
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Affiliation(s)
- Christian G M van Dijk
- Department of Nephrology and Hypertension, University Medical Center Utrecht, PO Box 85500, 3584 CX Utrecht, The Netherlands.
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Hermann M, Bachus K, Gibson GTT, Oleschuk RD. Open sessile droplet viscometer with low sample consumption. LAB ON A CHIP 2020; 20:1869-1876. [PMID: 32347278 DOI: 10.1039/d0lc00248h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This paper reports a portable viscometer that requires less than 10 μL of sample for a measurement. Using a two-droplet Laplace-induced pumping system on an open microfluidic substrate, the device measures the viscosity of a liquid by determining the time required for one droplet to completely pump into a second droplet. The pumping behaviour follows the Hagen-Poiseuille and Laplace relations where the flow rate, Q, is proportional to the liquid's kinematic viscosity, μ. The progress of pumping is measured by tracking the change in curvature of one of the droplets using a laser that is positioned perpendicular to the microfluidic chip and directed at the "tail" of the shrinking droplet. The angle of incidence and degree of refraction changes depending on the size of the droplet, which is tracked by a linear diode array placed beneath the microfluidic chip. Droplet reservoirs and connecting channels were defined by precise patterning of a glass substrate coated with a commercially available omniphobic coating (Ultra Ever Dry®) using laser micromachining. A 500 μm wide and 20 mm long channel with circular reservoirs (d = 1.5 mm) enabled the measurement of dynamic viscosities in the range of η = 1.0-2.87 mPa s. The materials cost for the entire viscometer (fluidics and electronics, etc.) is <15 USD.
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Affiliation(s)
- Matthias Hermann
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada.
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Lismaniah, Abdurrohim K, Srilestari A, Barasila AC. The Effect of Electroacupuncture on Plasma Fibrinogen Levels in Restraint Stress Wistar Rats. Med Acupunct 2020; 32:80-89. [PMID: 32351661 DOI: 10.1089/acu.2019.1370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Objective: Blood is a suspended cellular element that dissolves in plasma. Blood transports oxygen and nutrients to all body cells and carries metabolic waste from the whole body. The nature of blood flowing through vessels is a factor that plays an important role in oxygen delivery and tissue perfusion. In acute stress conditions, various reactions can occur and affect the blood flow in blood vessels. Electroacupuncture (EA) is an additional therapy with minimal side-effects that can improve the quality of blood flow. This study investigated the effect of EA bilaterally at ST 36 (Zusanli) on plasma fibrinogen. Materials and Methods: Eighteen male Wistar rats were divided randomly into 3 groups: (1) a control group (n = 6); (2) a restraint-stress group (n = 6); and (3) a restraint-stress-and-EA group (n = 6). EA was performed in group 3 after the rats were subjected to 3 hours of restraint stress. Results: There were significant mean differences in plasma fibrinogen levels (P = 0.048; 95% confidence interval: 0.5-109.5) between the restraint stress groups and the control group. Conclusion: This study showed that the EA on ST 36 lowered levels of plasma fibrinogen of Wistar rats in restraint stress model.
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Affiliation(s)
- Lismaniah
- Department of Medical Acupuncture, Faculty of Medicine University of Indonesia, Jakarta Pusat, Indonesia
| | - Kemas Abdurrohim
- Department of Medical Acupuncture, Faculty of Medicine University of Indonesia, Jakarta Pusat, Indonesia
| | - Adiningsih Srilestari
- Department of Medical Acupuncture, Faculty of Medicine University of Indonesia, Jakarta Pusat, Indonesia
| | - Atikah Chalida Barasila
- Department of Histology, Faculty of Medicine University of Indonesia, Jakarta Pusat, Indonesia
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Shear Thinning in the Prandtl Model and Its Relation to Generalized Newtonian Fluids. LUBRICANTS 2020. [DOI: 10.3390/lubricants8040038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Prandtl model is certainly the simplest and most generic microscopic model describing solid friction. It consists of a single, thermalized atom attached to a spring, which is dragged past a sinusoidal potential representing the surface energy corrugation of a counterface. While it was primarily introduced to rationalize how Coulomb’s friction law can arise from small-scale instabilities, Prandtl argued that his model also describes the shear thinning of liquids. Given its success regarding the interpretation of atomic-force-microscopy experiments, surprisingly little attention has been paid to the question how the Prandtl model relates to fluid rheology. Analyzing its Langevin and Brownian dynamics, we show that the Prandtl model produces friction–velocity relationships, which, converted to a dependence of effective (excess) viscosity on shear rate η ( γ ˙ ) , is strikingly similar to the Carreau–Yasuda (CY) relation, which is obeyed by many non-Newtonian liquids. The two dimensionless parameters in the CY relation are found to span a broad range of values. When thermal energy is small compared to the corrugation of the sinusoidal potential, the leading-order γ ˙ 2 corrections to the equilibrium viscosity only matter in the initial part of the cross-over from Stokes friction to the regime, where η obeys approximately a sublinear power law of 1 / γ ˙ .
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Whole blood viscosity in microvascular angina and coronary artery disease: Significance and utility. Rev Port Cardiol 2020; 39:17-23. [PMID: 32156449 DOI: 10.1016/j.repc.2019.04.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/01/2019] [Accepted: 04/07/2019] [Indexed: 01/13/2023] Open
Abstract
INTRODUCTION AND OBJECTIVES Whole blood viscosity (WBV) is the intrinsic resistance of blood flow in vessels, and when elevated induces endothelial shear stress and endothelial inflammation and can accelerate the atherosclerotic process. This study aims to compare WBV levels in patients with microvascular angina (MVA), patients with coronary artery disease (CAD), and normal controls, and to identify the relationship between WBV and high-sensitivity C-reactive protein as a marker of inflammation in MVA and CAD. METHODS A total of 573 patients were studied. The MVA group consisted of 189 subjects, the CAD group consisted of 203 subjects, and the control group consisted of 181 age- and gender-matched individuals. WBV was calculated from hematocrit and plasma protein concentration at a low shear rate (0.5 s-1) and high shear rate (208 s-1) by a validated equation. RESULTS Patients with CAD and MVA had significantly higher WBV at both low and high shear rates compared to the control group. Correlation analysis revealed a significant relationship between high-sensitivity C-reactive protein and WBV at low (r=0.556; p<0.001) and high shear rates (r=0.562) in the CAD group and at low (r=0.475) and high shear rates (r=0.493) in the MVA group. CONCLUSIONS Overall, this study demonstrated a significant and independent association between blood viscosity and the existence of endothelial inflammation and the atherosclerotic process.
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Feng L, Chen H, Chen J, Xiong C, Shao X, Wang X, Ning J, Xiang Z, Wang X, Chen T, Xiao H, Tang H, Li X, Hong G, Zou H. The Product of Red Blood Cells and Hematocrit Can Be Used as a Novel Indicator of Impaired Fasting Blood Glucose Status. Diabetes Metab Syndr Obes 2020; 13:4007-4015. [PMID: 33149640 PMCID: PMC7602892 DOI: 10.2147/dmso.s270276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 10/03/2020] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVE To explore whether the red blood cell count multiplied by hematocrit index (RBCHct) in blood routine parameters can indicate the risk of impaired fasting blood glucose (IFG), and whether it is related to insulin resistance and inflammation. METHODS In this cross-sectional study, previous history of diabetes was excluded, and people with normal and impaired IFG were included. We use Spearman analysis to evaluate the correlation between RBCHct index and fasting plasma glucose, insulin resistance homeostasis model assessment (HOMA-IR), and hypersensitive C-reactive protein (hs-CRP). Binary logistic regression analysis was used to evaluate the RBCHct index for assessing the potential risk of IFG, and the receiver operating characteristic (ROC) curve was used to evaluate the RBCHct index for diagnosing insulin resistance and chronic low-grade inflammatory efficacy among those with IFG. RESULTS Correlation analysis showed that the RBCHct index and fasting plasma glucose (r=0.088, P=0.003); HOMA-IR (r=0.199, P<0.001); and hs-CRP (r=0.097, P=0.001) were positively correlated. After adjusting for confounding factors, the risk of IFG in the third and fourth quartiles of the RBCHct index increased to 1.889 and 3.048 times. The area under the ROC curve of the RBCHct index for diagnosis of insulin resistance state (HOMA-IR) was 0.695 (p<0.001), and the area under the ROC curve of the RBCHct index for the diagnosis of chronic low-inflammatory state (hs-CRP) was 0.641 (P=0.010). CONCLUSION The RBCHct index may be a potential indicator for assessing the risk of prediabetes and is closely related to whether the body is in a state of insulin resistance and inflammation under IFG.
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Affiliation(s)
- Ling Feng
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Haishan Chen
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Jianhui Chen
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Chongxiang Xiong
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Xiaofei Shao
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Xin Wang
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Jing Ning
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Zhicong Xiang
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Xuan Wang
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Tong Chen
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Hua Xiao
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Hongjuan Tang
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Xiaolin Li
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Guobao Hong
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
| | - Hequn Zou
- Department of Nephrology, The Third Affiliated Hospital, Southern Medical University, Guangzhou510630, People’s Republic of China
- Correspondence: Hequn Zou; Xiaofei ShaoDepartment of Nephrology, The Third Affiliated Hospital, Southern Medical University, 183, Zhongshan West Avenue, Tianhe District, Guangzhou510630, People’s Republic of China Email ;
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Cekirdekci EI, Bugan B. Whole blood viscosity in microvascular angina and coronary artery disease: Significance and utility. REVISTA PORTUGUESA DE CARDIOLOGIA (ENGLISH EDITION) 2020. [DOI: 10.1016/j.repce.2019.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Zhou Z, Chen X, Zhou X, Yang X, Lu D, Kang W, Feng X. Effects of Intraoperative Gelatin on Blood Viscosity and Oxygenation Balance. J Perianesth Nurs 2019; 34:1274-1281. [DOI: 10.1016/j.jopan.2019.05.136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 05/05/2019] [Accepted: 05/21/2019] [Indexed: 11/17/2022]
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Ran N, Pang Z, Guan X, Wang G, Liu J, Li P, Zheng J, Wang F. Therapeutic Effect and Mechanism Study of Rhodiola wallichiana var. cholaensis Injection to Acute Blood Stasis Using Metabolomics Based on UPLC-Q/TOF-MS. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2019; 2019:1514845. [PMID: 31781258 PMCID: PMC6874959 DOI: 10.1155/2019/1514845] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 08/15/2019] [Accepted: 10/08/2019] [Indexed: 01/13/2023]
Abstract
In traditional Chinese medicine theory, blood stasis syndrome (BSS), characterized by blood flow retardation and blood stagnation, is one of the main pathologic mechanisms and clinical syndromes of cardiovascular diseases (CVDs). Rhodiola wallichiana var. cholaensis injection (RWCI) is made from dry roots and stems of RWC via the processes of decoction, alcohol precipitation, filtration, and dilution. Studies indicated the extracts of RWC could alleviate CVDs; however, the mechanism had not been illustrated. In the present study, the acute blood stasis rat model was established to investigate the pathogenesis of BSS and the therapeutic mechanism of RWCI against BSS. Hemorheological parameters (whole blood viscosity and plasma viscosity) and inflammatory factors (TNF-α and IL-6) were used to evaluate the success of the BSS rat model and RWCI efficacy. 14 and 33 differential metabolites were identified from plasma and urine samples using the metabolomics approach based on ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry. The results of multivariate analysis displayed that there were significant separations among model, control, and treatment groups, but the high-dose RWCI treatment group was closer to the control group. 9 perturbed metabolic pathways were related to BSS's development and RWCI intervention. 5 metabolic pathways (arachidonic acid metabolism, linoleic acid metabolism, alpha-linolenic acid metabolism, retinol metabolism, and steroid hormone biosynthesis) showed apparent correlations. These differential metabolites and perturbed metabolic pathways might provide a novel view to understand the pathogenesis of BSS and the pharmacological mechanism of RWCI.
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Affiliation(s)
- Nan Ran
- Department of Pathogen Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
| | - Zhiqiang Pang
- Department of Pathogen Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
| | - Xuewa Guan
- Department of Pathogen Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
| | - Guoqiang Wang
- Department of Pathogen Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
| | - Jinping Liu
- Research Center of Natural Drug, School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Pingya Li
- Research Center of Natural Drug, School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Jingtong Zheng
- Department of Pathogen Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
| | - Fang Wang
- Department of Pathogen Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
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Rasyid A, Harris S, Kurniawan M, Mesiano T, Hidayat R. Fibrinogen and LDL Influence on Blood Viscosity and Outcome of Acute Ischemic Stroke Patients in Indonesia. Ann Neurosci 2019; 26:30-34. [PMID: 32843830 PMCID: PMC7418568 DOI: 10.1177/0972753119900630] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND To assess the role of risk factors of metabolic syndrome on blood viscosity and the prognosis of acute ischemic stroke in Indonesia based on the National Institute of Health Stroke Scale (NIHSS) and modified Rankin Scale (mRS). METHODS This study included 135 patients with acute ischemic stroke. Patients underwent measurements of viscosity and risk factor assessment. Analysis was performed to assess the role of these risk factors for blood viscosity and outcomes of acute ischemic stroke with NIHSS and mRS as indicators. NIHSS was assessed at <3 days after onset and 7 days after onset, while mRS was assessed 1 month post treatment. Bivariate analysis was performed using chi-square test, and variables with p < 0.25 were further analyzed in multivariate analysis using logistic regression. RESULTS Factors affecting blood viscosity are fibrinogen, low-density lipoprotein (LDL), and hematocrit. Factors affecting NIHSS and mRS are fibrinogen and LDL. CONCLUSION Fibrinogen and LDL affect the viscosity of blood and outcomes in acute ischemic stroke patients, so it is necessary to treat in the primary and secondary prevention of ischemic stroke.
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Affiliation(s)
- Al Rasyid
- Department of Neurology, Cipto Mangunkusumo Hospital/Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Salim Harris
- Department of Neurology, Cipto Mangunkusumo Hospital/Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Mohammad Kurniawan
- Department of Neurology, Cipto Mangunkusumo Hospital/Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Taufik Mesiano
- Department of Neurology, Cipto Mangunkusumo Hospital/Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Rakhmad Hidayat
- Department of Neurology, Cipto Mangunkusumo Hospital/Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
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Radosinska J, Jasenovec T, Puzserova A, Krajcir J, Lacekova J, Kucerova K, Kalnovicova T, Tothova L, Kovacicova I, Vrbjar N. Promotion of whole blood rheology after vitamin C supplementation: focus on red blood cells 1. Can J Physiol Pharmacol 2019; 97:837-843. [PMID: 30983394 DOI: 10.1139/cjpp-2018-0735] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hemorheological properties represent significant contributors in the pathogenesis of cardiovascular diseases. As plasma vitamin C is inversely associated with blood viscosity in humans, we aimed to characterize the effect of vitamin C supplementation on hemorheology with an emphasis on erythrocyte functions. Twenty young healthy volunteers were asked to take vitamin C (1000 mg per day) for 3 weeks. We observed beneficial effect of intervention on multiple hemorheological parameters: whole blood viscosity in the range of medium to high shear rates, Casson yield stress, complex viscosity, and storage and loss moduli. As erythrocyte properties play a significant role in hemorheology, we characterized their deformability, nitric oxide production, and sodium pump activity in erythrocyte membranes. We can conclude that observed promotion in whole blood rheology may be consequence of improved erythrocyte functionality as concerns their ability to pass through narrow capillaries of the microcirculation, nitric oxide production, and sodium pump activity. Parameters reflecting oxidative stress and antioxidant status in plasma were not affected by our intervention. As improvement in hemorheology may play an important role in cardioprotection, it would be challenging to investigate the vitamin C supplementation to patients suffering from microcirculatory disturbances and worsened organ perfusion in the case of cardiovascular diseases.
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Affiliation(s)
- Jana Radosinska
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 2, Bratislava 813 72, Slovak Republic.,Center of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava 840 05, Slovak Republic
| | - Tomas Jasenovec
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 2, Bratislava 813 72, Slovak Republic
| | - Angelika Puzserova
- Center of Experimental Medicine, Institute of Normal and Pathological Physiology, Slovak Academy of Sciences, Sienkiewiczova 1, Bratislava 813 71, Slovak Republic
| | - Juraj Krajcir
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 2, Bratislava 813 72, Slovak Republic
| | - Jana Lacekova
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 2, Bratislava 813 72, Slovak Republic
| | - Katarina Kucerova
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 2, Bratislava 813 72, Slovak Republic
| | - Terezia Kalnovicova
- 1st Department of Neurology, Faculty of Medicine, Comenius University and University Hospital in Bratislava, Mickiewiczova 13, Bratislava 813 69, Slovak Republic
| | - Lubomira Tothova
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, Bratislava 811 08, Slovak Republic
| | - Ivona Kovacicova
- Center of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava 840 05, Slovak Republic
| | - Norbert Vrbjar
- Center of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava 840 05, Slovak Republic
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Kang YJ. Microfluidic-Based Technique for Measuring RBC Aggregation and Blood Viscosity in a Continuous and Simultaneous Fashion. MICROMACHINES 2018; 9:E467. [PMID: 30424400 PMCID: PMC6187833 DOI: 10.3390/mi9090467] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 09/06/2018] [Accepted: 09/11/2018] [Indexed: 01/04/2023]
Abstract
Hemorheological properties such as viscosity, deformability, and aggregation have been employed to monitor or screen patients with cardiovascular diseases. To effectively evaluate blood circulating within an in vitro closed circuit, it is important to quantify its hemorheological properties consistently and accurately. A simple method for measuring red blood cell (RBC) aggregation and blood viscosity is proposed for analyzing blood flow in a microfluidic device, especially in a continuous and simultaneous fashion. To measure RBC aggregation, blood flows through three channels: the left wide channel, the narrow channel and the right wide channel sequentially. After quantifying the image intensity of RBCs aggregated in the left channel () and the RBCs disaggregated in the right channel (), the RBC aggregation index (AIPM) is obtained by dividing by . Simultaneously, based on a modified parallel flow method, blood viscosity is obtained by detecting the interface between two fluids in the right wide channel. RBC aggregation and blood viscosity were first evaluated under constant and pulsatile blood flows. AIPM varies significantly with respect to blood flow rate (for both its amplitude and period) and the concentration of the dextran solution used. According to our quantitative comparison between the proposed aggregation index (AIPM) and the conventional aggregation index (AICM), it is found that AIPM provides consistent results. Finally, the suggested method is employed to obtain the RBC aggregation and blood viscosity of blood circulating within an in vitro fluidic circuit. The experimental results lead to the conclusion that the proposed method can be successfully used to measure RBC aggregation and blood viscosity, especially in a continuous and simultaneous fashion.
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Affiliation(s)
- Yang Jun Kang
- Department of Mechanical Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, Korea.
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Hanson EA, Sandmann C, Malyshev A, Lundervold A, Modersitzki J, Hodneland E. Estimating the discretization dependent accuracy of perfusion in coupled capillary flow measurements. PLoS One 2018; 13:e0200521. [PMID: 30028854 PMCID: PMC6054386 DOI: 10.1371/journal.pone.0200521] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 06/28/2018] [Indexed: 01/28/2023] Open
Abstract
One-compartment models are widely used to quantify hemodynamic parameters such as perfusion, blood volume and mean transit time. These parameters are routinely used for clinical diagnosis and monitoring of disease development and are thus of high relevance. However, it is known that common estimation techniques are discretization dependent and values can be erroneous. In this paper we present a new model that enables systematic quantification of discretization errors. Specifically, we introduce a continuous flow model for tracer propagation within the capillary tissue, used to evaluate state-of-the-art one-compartment models. We demonstrate that one-compartment models are capable of recovering perfusion accurately when applied to only one compartment, i.e. the whole region of interest. However, substantial overestimation of perfusion occurs when applied to fractions of a compartment. We further provide values of the estimated overestimation for various discretization levels, and also show that overestimation can be observed in real-life applications. Common practice of using compartment models for fractions of tissue violates model assumptions and careful interpretation is needed when using the computed values for diagnosis and treatment planning.
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Affiliation(s)
- Erik A. Hanson
- Department of Mathematics, University of Bergen, Bergen, Norway
| | - Constantin Sandmann
- Institute of Mathematics and Image Computing, University of Lübeck, Lübeck, Germany
| | | | - Arvid Lundervold
- Department of Biomedicine, University of Bergen, Bergen, Norway
- Department of Radiology, Haukeland University Hospital, Bergen, Norway
| | - Jan Modersitzki
- Institute of Mathematics and Image Computing, University of Lübeck, Lübeck, Germany
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Wang C, Lin L, Su R, Zhu W, Wei Y, Yan J, Feng H, Li B, Li S, Yang H. Hemoglobin levels during the first trimester of pregnancy are associated with the risk of gestational diabetes mellitus, pre-eclampsia and preterm birth in Chinese women: a retrospective study. BMC Pregnancy Childbirth 2018; 18:263. [PMID: 29940874 PMCID: PMC6020184 DOI: 10.1186/s12884-018-1800-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 04/30/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Hemoglobin (Hb) measurement is a standard test among pregnant women during the first perinatal visit that is used to evaluate physical status and anemia. However, studies focusing on Hb levels and pregnancy outcomes are scarce. This study aimed to determine whether Hb levels in early pregnancy were associated with the risk of gestational diabetes mellitus (GDM), pre-eclampsia (PE) and preterm birth. METHODS A hospital-based retrospective study was conducted among 21,577 singleton, non-smoking pregnancies between June 2013 and January 2015. The demographic data and medical information of each participant were collected individually through questionnaires and patient medical records. Odds ratios were generated using a multivariate logistic regression analysis to evaluate the relative risk of GDM, PE and preterm birth continuously and across different hemoglobin ranges in the overall population and in women from different pre-pregnancy body mass index (BMI) categories, respectively. The level of statistical significance was set at 0.05. RESULTS (1) For women who were underweight, normal-weight, overweight and obese, early pregnancy Hb levels were 127.8 ± 10.1 g/L, 129.6 ± 9.7 g/L, 132.2 ± 9.5 g/L and 133.4 ± 9.4 g/L, respectively. (2) Women with GDM and PE had significantly increased Hb levels during early pregnancy compared with controls, whereas women with preterm birth processed significantly decreased Hb levels. (3) After adjusting for confounders, the risks for GDM and PE increased with high maternal Hb (OR: 1.27 for Hb 130-149; OR: 2.06 for Hb ≥ 150 g/L), and the risk for preterm birth decreased with high maternal Hb (OR: 1.30 for Hb 130-149; OR: 2.38 for Hb ≥ 150 g/L) and increased with low maternal Hb (OR: 1.41 for Hb < 110 g/L). Among women whose BMI was < 24 kg/m2, high GDM (OR: 1.27 for Hb 130-149; OR: 1.84 for Hb ≥ 150 g/L) and low preterm rates (OR: 0.77 for Hb 130-149; OR: 0.23 for Hb ≥ 150 g/L) were observed with high Hb, whereas in women whose BMI was ≥24 kg/m2, only high GDM rates were observed with Hb > 150 g/L (OR: 2.33). CONCLUSION These findings suggest that Hb levels during early pregnancy play a role in predicting the risk of GDM, PE and preterm birth.
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Affiliation(s)
- Chen Wang
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Li Lin
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Rina Su
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Weiwei Zhu
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
- National Institute of Hospital Administration, Beijing, China
| | - Yumei Wei
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Jie Yan
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Hui Feng
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Boya Li
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Shuang Li
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
| | - Huixia Yang
- Department of Obstetrics and Gynecology of Peking University First Hospital, Xianmen Street No. 1, Xicheng District, Beijing, 100034 China
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Kim D, Cho DJ, Cho YI. Reduced amputation rate with isovolemic hemodilution in critical limb ischemia patients. Clin Hemorheol Microcirc 2018; 67:197-208. [PMID: 28922142 DOI: 10.3233/ch-120108] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AIMS Critical limb ischemia (CLI) patients are characterized by intractable pain in spite of medication, non-healing ulcers, and gangrene. The objective of this study was to investigate whether or not isovolemic hemodilution treatment can reduce the rate of major amputations in CLI. METHODS 28 patients were studied who had tissue loss on Rutherford Grade III, Category 5 or 6. The subjects were divided into two arms: standard-of-care, conventional therapy (CT) (n = 15) as a control group and hemodilution therapy (HT) (n = 13) as a study group. For the HT group, weekly isovolemic hemodilution was performed over 4 consecutive weeks, removing 250 ml of whole blood with the infusion of hydroxyl-ethyl starch solution. Blood viscosity, hematocrit, hemoglobin, ankle-brachial index, VA pain scale, time-to-amputation from admission, and survival time were measured. RESULTS The mean Hct gradually decreased from 36.6 to 35.1, whereas the WBV at a shear rate of 1 s-1 significantly decreased from 18.2 to 10.5 during the same period. Subsequently, tissue oxygen delivery index, defined as the ratio of Hct to WBV at a shear rate of 1 s-1, increased from 24.4 to 37.0 by 51.7%, suggesting improvements in oxygen delivery in the patients. The average rate of lower limb major amputation in the control group was 93% (14/15), whereas that in the study group was 31% (4/13) (p = 0.001). Amputation-free median survival time and amputation-free 5-year survival rate in the control group were 1.2 months and 7%, while those in the study group were 30.2 months and 44% (p = 0.001). There were no adverse effects from repetitive hemodilution in the study group. CONCLUSIONS Isovolemic hemodilution treatment of CLI patients was found to be well-tolerated and reduced the rate of major amputation resulting from the deterioration of CLI.
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Affiliation(s)
- Doosang Kim
- Department of Thoracic and Cardio-Vascular Surgery, Veterans Health Service Medical Center, Seoul, Korea
| | | | - Young I Cho
- Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USA
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Naghedi-Baghdar H, Nazari SM, Taghipour A, Nematy M, Shokri S, Mehri MR, Molkara T, Javan R. Effect of diet on blood viscosity in healthy humans: a systematic review. Electron Physician 2018; 10:6563-6570. [PMID: 29765583 PMCID: PMC5942579 DOI: 10.19082/6563] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/16/2017] [Indexed: 01/01/2023] Open
Abstract
Background Increased whole blood viscosity is associated with increased risk of morbidity and mortality of several life-threatening diseases, including cardiovascular and cerebrovascular disease. The effect of diet on human health has been indicated in many studies, and a health dietary pattern can reduce the incidence of several chronic diseases. Objective The aim of this systematic review was to assess the effect of diet on blood viscosity and related parameters such as haematocrit (HCT). Methods This systematic review was carried out in 2017. MEDLINE, Embase, Scopus, Web of Science, and the Cochrane Central Register of Controlled Trials were searched from inception to 2 May 2017. We selected and included randomized clinical trials (RCTs) in the study. The inclusion criteria were articles that describe the effect of any types of local and traditional diet on blood viscosity in apparently healthy individuals. Results Three randomized controlled trials were included in this systematic review. Different diets were used in the included trials. In one study, ingested dried–bonito broth (DBB) for four weeks, significantly reduced the blood passage time in the intervention group from 55.4±3.4 to 47.6±2.0 sec (mean ± SEM, p<0.05) compared with no significant change in the placebo group. Another study has shown significantly increased blood fluidity score in a vegetarian group in contrast to the control group after six weeks. In the last study, plasma viscosity was significantly decreased in a group which used onion–olive-oil capsules compared to the placebo group, with a highly significant difference between the two groups (p=0.0015). Conclusions Our components of food diets may decrease blood viscosity in health status. Better and expanded methodology may improve our results.
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Affiliation(s)
- Hamideh Naghedi-Baghdar
- Student Research Committee, Faculty of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed-Mohammad Nazari
- Faculty of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Taghipour
- Department of Biostatistics and Health Sciences Research Center, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohsen Nematy
- Biochemistry and Nutrition Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Sadegh Shokri
- Faculty of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad-Reza Mehri
- Student Research Committee, Faculty of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Tahereh Molkara
- Student Research Committee, Faculty of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Roghayeh Javan
- Traditional and Complementary Medicine Research Center, Sabzevar University of Medical Sciences, Sabzevar, Iran
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Kang YJ. Periodic and simultaneous quantification of blood viscosity and red blood cell aggregation using a microfluidic platform under in-vitro closed-loop circulation. BIOMICROFLUIDICS 2018; 12:024116. [PMID: 29682144 PMCID: PMC5891346 DOI: 10.1063/1.5017052] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 03/29/2018] [Indexed: 05/13/2023]
Abstract
To evaluate variations of blood circulating in closed loops, hemorheological properties including blood viscosity and red blood cells (RBCs) are quantitatively measured with independent in-vitro instruments after collecting blood from a closed loop. But, most previous methods require periodic blood collections which induce several problems such as geometric differences between the fluidic channel and the in-vitro method, hemodilution, storage time, and unspecific blood flow rates. To resolve these issues, in this study, blood viscosity and RBC aggregation of blood circulating within a closed loop are measured with a microfluidic platform periodically and simultaneously. To demonstrate the proposed method, in-vitro closed-loop circulation is established by connecting several components (peristaltic pump, air compliance unit, fluid divider, and reservoir) in series. In addition, to measure blood viscosity and RBC aggregation, a microfluidic platform composed of a microfluidic device, pinch valve, and syringe pump is created. During each period, blood viscosity and RBC aggregation are measured by monitoring blood flow at constant blood flow, and image intensity at stationary blood flow. The proposed method is first employed to evaluate the effect of hematocrits and dextran concentrations on the RBC aggregation and blood viscosity by using a syringe pump (i.e., specific blood flow-rate). The method is then applied to detect the blood viscosity and RBC aggregation under in-vitro closed-loop circulation (i.e., unspecific blood flow-rate). From these experimental demonstrations, it is found that the suggested method can be effectively used to monitor the RBC aggregation and blood viscosity under in-vitro closed-loop circulation. Since this method does not require periodic collection from closed-loop circulation or an additional procedure for estimating blood flow-rate with a syringe pump, it will be effectively used to monitor variations of blood circulating in extracorporeal bypass loops.
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Affiliation(s)
- Yang Jun Kang
- Department of Mechanical Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, South Korea
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Chevalier G, Patel S, Weiss L, Pruitt C, Henry B, Chopra D, Mills PJ. Effects of Grounding (Earthing) on Massage Therapists: An Exploratory Study. Health (London) 2018. [DOI: 10.4236/health.2018.102019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Microfluidic-Based Measurement Method of Red Blood Cell Aggregation under Hematocrit Variations. SENSORS 2017; 17:s17092037. [PMID: 28878199 PMCID: PMC5620946 DOI: 10.3390/s17092037] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/02/2017] [Accepted: 09/04/2017] [Indexed: 01/29/2023]
Abstract
Red blood cell (RBC) aggregation and erythrocyte sedimentation rate (ESR) are considered to be promising biomarkers for effectively monitoring blood rheology at extremely low shear rates. In this study, a microfluidic-based measurement technique is suggested to evaluate RBC aggregation under hematocrit variations due to the continuous ESR. After the pipette tip is tightly fitted into an inlet port, a disposable suction pump is connected to the outlet port through a polyethylene tube. After dropping blood (approximately 0.2 mL) into the pipette tip, the blood flow can be started and stopped by periodically operating a pinch valve. To evaluate variations in RBC aggregation due to the continuous ESR, an EAI (Erythrocyte-sedimentation-rate Aggregation Index) is newly suggested, which uses temporal variations of image intensity. To demonstrate the proposed method, the dynamic characterization of the disposable suction pump is first quantitatively measured by varying the hematocrit levels and cavity volume of the suction pump. Next, variations in RBC aggregation and ESR are quantified by varying the hematocrit levels. The conventional aggregation index (AI) is maintained constant, unrelated to the hematocrit values. However, the EAI significantly decreased with respect to the hematocrit values. Thus, the EAI is more effective than the AI for monitoring variations in RBC aggregation due to the ESR. Lastly, the proposed method is employed to detect aggregated blood and thermally-induced blood. The EAI gradually increased as the concentration of a dextran solution increased. In addition, the EAI significantly decreased for thermally-induced blood. From this experimental demonstration, the proposed method is able to effectively measure variations in RBC aggregation due to continuous hematocrit variations, especially by quantifying the EAI.
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Jung JH, Chae YJ, Lee DH, Cho YI, Ko MM, Park SK, Kim W. Changes in whole blood viscosity during hemodialysis and mortality in patients with end-stage renal disease. Clin Hemorheol Microcirc 2017; 65:285-297. [DOI: 10.3233/ch-16183] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jong Hwan Jung
- Department of Internal Medicine, Divsion of Nephrology, Wonkwang University College of Medicine, Iksan, Republic of Korea
| | - Yoon Jung Chae
- College of Nursing, Chonbuk National University, Jeonju, Republic of Korea
| | - Dong Hwan Lee
- Department of Mechanical Design Engineering, Engineering College, Chonbuk National University, Jeonju, Republic of Korea
| | - Young I. Cho
- Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania, USA
| | - Mi Mi Ko
- KM Fundamental Research Division, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
| | - Sung Kwang Park
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Won Kim
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea
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Chen C, Qu Z, Yin X, Shang C, Ao Q, Gu Y, Liu Y. Efficacy of umbilical cord-derived mesenchymal stem cell-based therapy for osteonecrosis of the femoral head: A three-year follow-up study. Mol Med Rep 2016; 14:4209-4215. [PMID: 27634376 PMCID: PMC5101965 DOI: 10.3892/mmr.2016.5745] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/30/2016] [Indexed: 01/16/2023] Open
Abstract
This is a retrospective analysis of the clinical effects of transplant of mesenchymal stem cells (MSCs) derived from human umbilical cord-derived MSCs (hUC-MSCs) for the treatment of osteonecrosis of the femoral head (ONFH). The biological characteristics of hUC-MSCs were assessed using flow cytometry. Nine eligible patients were enrolled in the study as they adhered to the Association Research Circulation Osseous (ARCO) classification of stage II–IIIa, and hUC-MSCs were grafted by intra-arterial infusion. Organize effective perfusion was assessed using the oxygen delivery index (ODI). The results showed that the ODI was increased at three days post-operation. The MRI results revealed that at 12 and 24 months after treatment, the necrotic volume of the femoral heads was significantly reduced. No obvious abnormalities were observed. Taken together, these data indicate that intra-arterially infused hUC-MSCs migrate into the necrotic field of femoral heads and differentiate into osteoblasts, thus improving the necrosis of femoral heads. This finding suggested that intra-arterial infusion of hUC-MSCs MSCs is a feasible and relatively safe method for the treatment of femoral head necrosis.
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Affiliation(s)
- Chun Chen
- Department of Vascular Interventional Surgery, Siping Hospital of China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Zhiguo Qu
- Department of Orthopaedic Surgery, Siping Hospital of China Medical University, Siping, Jilin 136000, P.R. China
| | - Xiaoguang Yin
- Tuhua Bioengineering Company Ltd., Siping, Jilin 136000, P.R. China
| | - Chunyu Shang
- Department of Vascular Interventional Surgery, Siping Hospital of China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Qiang Ao
- Department of Tissue Engineering, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Yongquan Gu
- Department of Vascular Interventional Surgery, Xuanwu Hospital of Capital Medical University, Beijing 100053, P.R. China
| | - Ying Liu
- Tuhua Bioengineering Company Ltd., Siping, Jilin 136000, P.R. China
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Yi JE, Youn HJ. Hemorheological abnormalities and their associations with coronary blood flow in patients with cardiac syndrome X: a comparison between males and females. Perfusion 2016; 32:57-67. [DOI: 10.1177/0267659116661052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Aim: The role of elevated whole blood viscosity (WBV) in the pathogenesis of atherosclerosis is well known. We sought to investigate the gender differences in the association between WBV, coronary blood flow and tissue oxygen delivery index (TODI) in cardiac syndrome X (CSX). Methods: Forty-six CSX patients and 14 healthy volunteers were enrolled. The coronary flow parameters were obtained with transthoracic Doppler echocardiography and WBV was measured (at high-shear and low-shear rates of 300s-1 and 5s-1, respectively) using a scanning capillary tube viscometer. TODI was determined from the ratio of hematocrit to WBV measured at a low-shear rate of 5s-1. Results: In male patients, the mean diastolic coronary flow velocity (CFV) and diastolic velocity time integral (VTI) were significantly decreased compared to control group (all p<0.05) and the WBV showed significant negative correlation with peak systolic CFV (r = −0.559 at 300s-1, r = −0.438 at 5s-1), mean systolic CFV (r = −0.577 at 300s-1, r = −0.488 at 5s-1), systolic VTI (r = −0.576 at 300s-1, r = −0.530 at 5s-1) and diastolic VTI (r = −0.553 at 300s-1, r = −0.551 at 5s-1) (all p<0.01). Meanwhile, although female patients showed no significant relationships between WBV and coronary flow parameters, TODI were significantly decreased compared to the control group (3.64 ± 0.34 vs. 4.07 ± 0.38%/centipoises (cP), respectively, p=0.008). Conclusion: Our study suggests that there are gender-related differences in the pathogenesis of microvascular angina and gender-specific approaches for CSX patients might be needed.
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Affiliation(s)
- Jeong-Eun Yi
- Department of Cardiology, Ewha Womans University Mokdong Hospital, Ewha Womans University School of Medicine, Seoul, Republic of Korea
| | - Ho-Joong Youn
- Department of Cardiology, Seoul St. Mary’s Hospital, The Catholic University of Korea College of Medicine, Seoul, Republic of Korea
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