1
|
Hewes SA, Ahmad FN, Connell JP, Grande-Allen KJ. Technique for Rapidly Forming Networks of Microvessel-Like Structures. Tissue Eng Part C Methods 2024. [PMID: 38568845 DOI: 10.1089/ten.tec.2023.0318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024] Open
Abstract
Modeling organ-blood barriers through the inclusion of microvessel networks within in vitro tissue models could lead to more physiologically accurate results, especially since organ-blood barriers are crucial to the normal function, drug transport, and disease states of vascularized organs. Microvessel networks are difficult to form, since they push the practical limits of most fabrication methods, and it is difficult to coax vascular cells to self-assemble into structures larger than capillaries. Here, we present a method for rapidly forming networks of microvessel-like structures using sacrificial alginate structures. Specifically, we encapsulated endothelial cells within short alginate threads, and then embedded them in collagen gel. Following enzymatic degradation of the alginate, the collagen gel contained a network of hollow channels seeded with cells, all surrounding a perfusable central channel. This method uses a 3D-printed coaxial extruder and syringe pumps to generate short threads in a way that is repeatable and easily transferrable to other labs. The cell-laden, sacrificial alginate threads can be frozen after fabrication and thawed before embedding without significant loss of cell viability. The ability to freeze the threads enables future scale-up and ease of use. Within millifluidic devices that restrict access to media, the threads enhance cell survival under static conditions. These results indicate the potential for use of this method in a range of tissue engineering applications.
Collapse
Affiliation(s)
- Sarah A Hewes
- Department of Bioengineering, Rice University, Houston, Texas, USA
| | - Fariha N Ahmad
- Department of Bioengineering, Rice University, Houston, Texas, USA
| | | | | |
Collapse
|
2
|
Porter JC, Ganeshan B, Win T, Fraioli F, Khan S, Rodriguez-Justo M, Endozo R, Shortman RI, Hoy LR, Maher TM, Groves AM. [ 18F]FDG PET/CT Signal Correlates with Neoangiogenesis Markers in Patients with Fibrotic Interstitial Lung Disease Who Underwent Lung Biopsy: Implication for the Use of PET/CT in Diffuse Lung Diseases. J Nucl Med 2024; 65:617-622. [PMID: 38485275 PMCID: PMC10995524 DOI: 10.2967/jnumed.123.266445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 01/11/2024] [Indexed: 04/04/2024] Open
Abstract
The use of [18F]FDG PET/CT as a biomarker in diffuse lung diseases is increasingly recognized. We investigated the correlation between [18F]FDG uptake with histologic markers on lung biopsy of patients with fibrotic interstitial lung disease (fILD). Methods: We recruited 18 patients with fILD awaiting lung biopsy for [18F]FDG PET/CT. We derived a target-to-background ratio (TBR) of maximum pulmonary uptake of [18F]FDG (SUVmax) divided by the lung background (SUVmin). Consecutive paraffin-embedded lung biopsy sections were immunostained for alveolar and interstitial macrophages (CD68), microvessel density (MVD) (CD31 and CD105/endoglin), and glucose transporter 1. MVD was expressed as vessel area percentage per high-power field (Va%/hpf). Differences in imaging and angiogenesis markers between histologic usual interstitial pneumonia (UIP) and non-UIP were assessed using a nonparametric Mann-Whitney test. Correlation of imaging with angiogenesis markers was assessed using the nonparametric Spearman rank correlation. Univariate Kaplan-Meier survival analysis assessed the difference in the survival curves for each of the angiogenesis markers (separated by their respective optimal cutoff) using the log-rank test. Statistical analysis was performed using SPSS. Results: In total, 18 patients were followed for an average of 41.36 mo (range, 5.69-132.46 mo; median, 30.07 mo). Only CD105 MVD showed a significantly positive correlation with [18F]FDG TBR (Spearman rank correlation, 0.556; P < 0.05, n = 13). There was no correlation between [18F]FDG uptake and macrophage expression of glucose transporter 1. CD105 and CD31 were higher for UIP than for non-UIP, with CD105 reaching statistical significance (P = 0.011). In all patients, MVD assessed with either CD105 or CD31 quantification on biopsy predicted overall survival. Patients with CD105 MVD of less than 12 Va%/hpf or CD31 MVD of less than 35 Va%/hpf had a significantly better prognosis (no deaths during follow-up in the case of CD105) than did patients with higher scores of CD105 MVD (median survival, 35 mo; P = 0.041, n = 13) or CD31 MVD (median survival, 28 mo; P = 0.014, n = 13). Conclusion: Previous work has used [18F]FDG uptake in PET/CT as a biomarker in fILD. Here, we highlight a correlation between angiogenesis and [18F]FDG TBR. We show that MVD is higher for UIP than for non-UIP and is associated with mortality in patients with fILD. These data set the scene to investigate the potential role of vasculature and angiogenesis in fibrosis.
Collapse
Affiliation(s)
- Joanna C Porter
- CITR, UCL Respiratory, University College London, London, United Kingdom;
- Interstitial Lung Disease Centre, University College London Hospital, London, United Kingdom
| | - Balaji Ganeshan
- Institute of Nuclear Medicine, University College London and University College London Hospital, London, United Kingdom
| | - Thida Win
- Lister Hospital, North East Herts Trust, Stevenage, United Kingdom
| | - Francesco Fraioli
- Institute of Nuclear Medicine, University College London and University College London Hospital, London, United Kingdom
| | - Saif Khan
- Research Department of Pathology, University College London, and Department of Histopathology, University College London Hospital, London, United Kingdom; and
| | - Manuel Rodriguez-Justo
- Research Department of Pathology, University College London, and Department of Histopathology, University College London Hospital, London, United Kingdom; and
| | - Raymond Endozo
- Institute of Nuclear Medicine, University College London and University College London Hospital, London, United Kingdom
| | - Robert I Shortman
- Institute of Nuclear Medicine, University College London and University College London Hospital, London, United Kingdom
| | - Luke R Hoy
- Institute of Nuclear Medicine, University College London and University College London Hospital, London, United Kingdom
| | - Toby M Maher
- Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Ashley M Groves
- Institute of Nuclear Medicine, University College London and University College London Hospital, London, United Kingdom
| |
Collapse
|
3
|
Niedowicz DM, Gollihue JL, Weekman EM, Phe P, Wilcock DM, Norris CM, Nelson PT. Using digital pathology to analyze the murine cerebrovasculature. J Cereb Blood Flow Metab 2024; 44:595-610. [PMID: 37988134 PMCID: PMC10981399 DOI: 10.1177/0271678x231216142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/22/2023]
Abstract
Research on the cerebrovasculature may provide insights into brain health and disease. Immunohistochemical staining is one way to visualize blood vessels, and digital pathology has the potential to revolutionize the measurement of blood vessel parameters. These tools provide opportunities for translational mouse model research. However, mouse brain tissue presents a formidable set of technical challenges, including potentially high background staining and cross-reactivity of endogenous IgG. Formalin-fixed paraffin-embedded (FFPE) and fixed frozen sections, both of which are widely used, may require different methods. In this study, we optimized blood vessel staining in mouse brain tissue, testing both FFPE and frozen fixed sections. A panel of immunohistochemical blood vessel markers were tested (including CD31, CD34, collagen IV, DP71, and VWF), to evaluate their suitability for digital pathological analysis. Collagen IV provided the best immunostaining results in both FFPE and frozen fixed murine brain sections, with highly-specific staining of large and small blood vessels and low background staining. Subsequent analysis of collagen IV-stained sections showed region and sex-specific differences in vessel density and vessel wall thickness. We conclude that digital pathology provides a useful tool for relatively unbiased analysis of the murine cerebrovasculature, provided proper protein markers are used.
Collapse
Affiliation(s)
- Dana M Niedowicz
- Sanders Brown Center on Aging, University of Kentucky, Lexington, KY, USA
| | - Jenna L Gollihue
- Sanders Brown Center on Aging, University of Kentucky, Lexington, KY, USA
| | - Erica M Weekman
- Stark Neurosciences Research Institute, Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Panhavuth Phe
- Sanders Brown Center on Aging, University of Kentucky, Lexington, KY, USA
| | - Donna M Wilcock
- Stark Neurosciences Research Institute, Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Christopher M Norris
- Sanders Brown Center on Aging, University of Kentucky, Lexington, KY, USA
- Department of Pharmacology, University of Kentucky, Lexington, KY, USA
| | - Peter T Nelson
- Sanders Brown Center on Aging, University of Kentucky, Lexington, KY, USA
- Department of Pathology, University of Kentucky, Lexington, KY, USA
| |
Collapse
|
4
|
Hewes SA, Ahmad FN, Connell JP, Grande-Allen KJ. Technique for rapidly forming networks of microvessel-like structures. bioRxiv 2024:2023.06.22.546165. [PMID: 37961290 PMCID: PMC10634690 DOI: 10.1101/2023.06.22.546165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Modelling organ-blood barriers through the inclusion of microvessel networks within in vitro tissue models could lead to more physiologically accurate results, especially since organ-blood barriers are crucial to the normal function, drug transport, and disease states of vascularized organs. Microvessel networks are difficult to form, since they push the practical limit of most fabrication methods, and it is difficult to coax vascular cells to self-assemble into structures larger than capillaries. Here we present a method for rapidly forming networks of microvessel-like structures using sacrificial, alginate structures. Specifically, we encapsulated endothelial cells within short alginate threads, then embedded them in collagen gel. Following enzymatic degradation of the alginate, the collagen gel contained a network of hollow channels seeded with cells, all surrounding a perfusable central channel. This method uses a 3D printed coaxial extruder and syringe pumps to generate short threads in a way that is repeatable and easily transferrable to other labs. The cell-laden, sacrificial alginate threads can be frozen after fabrication and thawed before embedding without significant loss of cell viability. The ability to freeze the threads enables future scale up and ease of use. Within millifluidic devices that restrict access to media, the threads enhance cell survival under static conditions. These results indicate the potential for use of this method in a range of tissue engineering applications.
Collapse
Affiliation(s)
- Sarah A. Hewes
- Department of Bioengineering, Rice University, Houston, TX
| | | | | | | |
Collapse
|
5
|
Xian M, Yu J, Li Z, Piao Y, Wang C, Xian J, Zhang L. Microvessel barrier dysfunction in sinonasal inverted papilloma-associated squamous cell carcinoma and its manifestation in dynamic contrast-enhanced MRI. Int Forum Allergy Rhinol 2024. [PMID: 38247185 DOI: 10.1002/alr.23316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/04/2023] [Accepted: 12/26/2023] [Indexed: 01/23/2024]
Abstract
BACKGROUND To date, an effective means to preoperatively predict the malignant transformation of sinonasal inverted papilloma (SIP) remains lacking due to similarities in clinical appearance. This study aimed to retrospectively evaluate dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters and microvessel structure in tumors with histologically confirmed SIP and inverted papilloma-associated squamous cell carcinoma (IP-SCC), as well as correlate DCE-MRI findings with angiogenesis biomarkers. METHODS Absolute quantitative DCE-MRI parameters (Ktrans , Kep , Ve ) based on the Tofts model and model-free semi-quantitative indices (Tpeak , WR, MaxSlope) of SIP (n = 22) and IP-SCC (n = 20) were investigated. Regions of interest (ROIs) were oriented according to the tumor subsites in the surgical records. Micro-vessel density (MVD) counts and tight junction protein (claudin-5) expression were evaluated in tumor specimens obtained during surgery. Differences in the above data were compared between the two groups. Correlations between DCE-MRI parameters and angiogenic biomarkers were analyzed. RESULTS Compared with SIP specimens, IP-SCC specimens were characterized by a significantly higher MVD and a leakier microvessel barrier. The values of Tpeak and Ve were significantly higher for SIP than those for IP-SCC, whereas WR, MaxSlope, and Kep were significantly lower, indicating early enhancement and a faster dispersion model in IP-SCC. MVD was positively correlated with WR and Kep and negatively correlated with Tpeak . Tpeak was slightly positively correlated to claudin-5 expression. CONCLUSION DCE-MRI can serve as a noninvasive biomarker of angiogenesis in the malignant transformation from SIP to IP-SCC. DCE-MRI may assist in the differentiation of malignancies and treatment selection.
Collapse
Affiliation(s)
- Mu Xian
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jiaqi Yu
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Zheng Li
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yingshi Piao
- Department of Pathology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Chegnshuo Wang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, Beijing, China
| | - Junfang Xian
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Luo Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, Beijing, China
| |
Collapse
|
6
|
Qu Q, Liu Z, Lu M, Xu L, Zhang J, Liu M, Jiang J, Gu C, Ma Q, Huang A, Zhang X, Zhang T. Preoperative Gadoxetic Acid-Enhanced MRI Features for Evaluation of Vessels Encapsulating Tumor Clusters and Microvascular Invasion in Hepatocellular Carcinoma: Creating Nomograms for Risk Assessment. J Magn Reson Imaging 2023. [PMID: 38116997 DOI: 10.1002/jmri.29187] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 12/01/2023] [Accepted: 12/02/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND Vessels encapsulating tumor cluster (VETC) and microvascular invasion (MVI) have a synergistic effect on prognosis assessment and treatment selection of hepatocellular carcinoma (HCC). Preoperative noninvasive evaluation of VETC and MVI is important. PURPOSE To explore the diagnosis value of preoperative gadoxetic acid (GA)-enhanced magnetic resonance imaging (MRI) features for MVI, VETC, and recurrence-free survival (RFS) in HCC. STUDY TYPE Retrospective. POPULATION 240 post-surgery patients with 274 pathologically confirmed HCC (allocated to training and validation cohorts with a 7:3 ratio) and available tumor marker data from August 2014 to December 2021. FIELD STRENGTH/SEQUENCE 3-T, T1-, T2-, diffusion-weighted imaging, in/out-phase imaging, and dynamic contrast-enhanced imaging. ASSESSMENT Three radiologists subjectively reviewed preoperative MRI, evaluated clinical and conventional imaging features associated with MVI+, VETC+, and MVI+/VETC+ HCC. Regression-based nomograms were developed for HCC in the training cohort. Based on the nomograms, the RFS prognostic stratification system was further. Follow-up occurred every 3-6 months. STATISTICAL TESTS Chi-squared test or Fisher's exact test, Mann-Whitney U-test or t-test, least absolute shrinkage and selection operator-penalized, multivariable logistic regression analyses, receiver operating characteristic analysis, Harrell's concordance index (C-index), Kaplan-Meier plots. Significance level: P < 0.05. RESULTS In the training group, 44 patients with MVI+ and 74 patients with VETC+ were histologically confirmed. Three nomograms showed good performance in the training (C-indices: MVI+ vs. VETC+ vs. MVI+/VETC+, 0.892 vs. 0.848 vs. 0.910) and validation (C-indices: MVI+ vs. VETC+ vs. MVI+/VETC+, 0.839 vs. 0.810 vs. 0.855) cohorts. The median follow-up duration for the training cohort was 43.6 (95% CI, 35.0-52.2) months and 25.8 (95% CI, 16.1-35.6) months for the validation cohort. Patients with either pathologically confirmed or nomogram-estimated MVI, VETC, and MVI+/VETC+ suffered higher risk of recurrence. DATA CONCLUSION GA-enhanced MRI and clinical variables might assist in preoperative estimation of MVI, VETC, and MVI+/VETC+ in HCC. EVIDENCE LEVEL 4 TECHNICAL EFFICACY: Stage 2.
Collapse
Affiliation(s)
- Qi Qu
- Nantong University, Nantong, Jiangsu, China
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Zixin Liu
- Nantong University, Nantong, Jiangsu, China
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Mengtian Lu
- Nantong University, Nantong, Jiangsu, China
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Lei Xu
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Jiyun Zhang
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Maotong Liu
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Jifeng Jiang
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Chunyan Gu
- Department of Pathology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Qinrong Ma
- Department of Pathology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Aina Huang
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Xueqin Zhang
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| | - Tao Zhang
- Department of Radiology, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, China
| |
Collapse
|
7
|
Wang H, Zhang Z, Hongpaisan J. PKCε activator protects hippocampal microvascular disruption and memory defect in 3×Tg-Alzheimer's disease mice with cerebral microinfarcts. Front Aging Neurosci 2023; 15:1272361. [PMID: 38187357 PMCID: PMC10768563 DOI: 10.3389/fnagi.2023.1272361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 11/23/2023] [Indexed: 01/09/2024] Open
Abstract
Background Current evidence suggests that microvessel disease is involved in Alzheimer's disease (AD). Cerebrovascular disease correlates with cardiovascular disease and is complicated in ≈40% of AD patients. The protein kinase C (PKC) ε activator DCPLA can stimulate human antigen (Hu) R that prevents degradation and promotes the translation of mitochondrial Mn-superoxide dismutase (MnSOD) and vascular endothelial growth factor-A (VEGF) mRNAs. Methods To induce brain microinfarcts, we injected triple transgenic (3×Tg) and wild-type (WT) control mice with microbeads (20 μm caliber) into common carotid arteries, with or without the DCPLA-ME (methyl-ester) for 2 weeks. After water maze training, mice at 16 months old were examined for confocal immunohistochemistry at a single cell or microvessel level in the hippocampal CA1 area, important for spatial memory storage, and in the dorsal hippocampus by western blots. Results In 3×Tg mice without cerebral microinfarcts, an accelerating age-related increase in (mild) oxidative stress and hypoxia inducible factor (HIF)-1α, but a reduction in VEGF, mitochondrial transcription factor A (TFAM), and MnSOD were associated with capillary loss. The change was less pronounced in arterioles. However, in 3×Tg mice with cerebral microinfarcts, increasing arteriolar diameter and their wall cells were related with the strong oxidative DNA damage 8-hydroxy-2'-deoxyguanosine (8-OHdG), apoptosis (cleaved caspase 3), and sustained hypoxia (increased HIF-1α and VEGF/PKCε/extracellular signal regulated kinase or ERK pathway). Microocclusion enhanced the loss of the synaptic marker spinophilin, astrocytic number, and astrocyte-vascular coupling areas and demyelination of axons. DCPLA-ME prevented spatial memory defect; strong oxidative stress-related apoptosis; sustained hypoxia (by reducing HIF-1α and VEGF); and exaggerated cell repair in arteriolar walls, pericapillary space dilation, neuro-glial-vascular disruption, and demyelination. Conclusion In conclusion, in 3×Tg mice with cerebral microinfarcts, sustained hypoxia (increased HIF-1α and VEGF signals) is dominant with arteriolar wall thickening, and DCPLA has a protective effect on sustained hypoxia.
Collapse
Affiliation(s)
| | | | - Jarin Hongpaisan
- Department of Medicine, Center for Translational Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States
| |
Collapse
|
8
|
Schwarting J, Harapan BN, Lin X, Plesnila N, Terpolilli NA. Nimodipine Reduces Microvasospasms After Experimental Subarachnoid Hemorrhage. Stroke 2023; 54:2666-2670. [PMID: 37675614 DOI: 10.1161/strokeaha.123.043976] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/12/2023] [Indexed: 09/08/2023]
Abstract
BACKGROUND The only established pharmacological treatment option improving outcomes for patients suffering from subarachnoid hemorrhage (SAH) is the L-type-calcium channel inhibitor nimodipine. However, the exact mechanisms of action of nimodipine conferring neuroprotection after SAH have yet to be determined. More recently, spasms of the cerebral microcirculation were suggested to play an important role in reduced cerebral perfusion after SAH and, ultimately, outcome. It is unclear whether nimodipine may influence microvasospasms and, thus, microcirculatory dysfunction. The aim of the current study was, therefore, to assess the effect of nimodipine on microvasospasms after experimental SAH. METHODS Male C57Bl/6 N mice (n=3-5/group) were subjected to SAH using the middle cerebral artery perforation model. Six hours after SAH induction, a cranial window was prepared, and the diameter of cortical microvessels was assessed in vivo by 2-photon-microscopy before, during, and after nimodipine application. RESULTS Nimodipine significantly reduced the number of posthemorrhagic microvasospasms. The diameters of nonspastic vessels were not affected. CONCLUSIONS Our results show that nimodipine reduces the formation of microvasospasms, thus, shedding new light on the mode of action of a drug routinely used for the treatment of SAH for >3 decades. Furthermore, L-type Ca2+ channels may be involved in the pathophysiology of microvasospasm formation.
Collapse
Affiliation(s)
- Julian Schwarting
- Institute for Stroke and Dementia Research (ISD) (J.S., B.N.H., X.L., N.P., N.A.T.)
- Now with Department of Neuroradiology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany (J.S.)
- Department of Neurosurgery, LMU University Hospital, LMU Munich, Germany (J.S., B.N.H., N.A.T.)
- Munich Cluster for Systems Neurology (SyNergy), Germany (J.S., B.N.H., X.L., N.P., N.A.T.)
| | - Biyan Nathanael Harapan
- Institute for Stroke and Dementia Research (ISD) (J.S., B.N.H., X.L., N.P., N.A.T.)
- Department of Neurosurgery, LMU University Hospital, LMU Munich, Germany (J.S., B.N.H., N.A.T.)
- Munich Cluster for Systems Neurology (SyNergy), Germany (J.S., B.N.H., X.L., N.P., N.A.T.)
| | - Xiangjiang Lin
- Institute for Stroke and Dementia Research (ISD) (J.S., B.N.H., X.L., N.P., N.A.T.)
- Munich Cluster for Systems Neurology (SyNergy), Germany (J.S., B.N.H., X.L., N.P., N.A.T.)
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research (ISD) (J.S., B.N.H., X.L., N.P., N.A.T.)
- Munich Cluster for Systems Neurology (SyNergy), Germany (J.S., B.N.H., X.L., N.P., N.A.T.)
| | - Nicole A Terpolilli
- Institute for Stroke and Dementia Research (ISD) (J.S., B.N.H., X.L., N.P., N.A.T.)
- Department of Neurosurgery, LMU University Hospital, LMU Munich, Germany (J.S., B.N.H., N.A.T.)
- Munich Cluster for Systems Neurology (SyNergy), Germany (J.S., B.N.H., X.L., N.P., N.A.T.)
| |
Collapse
|
9
|
Wang L, Yuan PQ, Taché Y. Vasculature in the mouse colon and spatial relationships with the enteric nervous system, glia, and immune cells. Front Neuroanat 2023; 17:1130169. [PMID: 37332321 PMCID: PMC10272736 DOI: 10.3389/fnana.2023.1130169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 03/15/2023] [Indexed: 06/20/2023] Open
Abstract
The distribution, morphology, and innervation of vasculature in different mouse colonic segments and layers, as well as spatial relationships of the vasculature with the enteric plexuses, glia, and macrophages are far from being complete. The vessels in the adult mouse colon were stained by the cardiovascular perfusion of wheat germ agglutinin (WGA)-Alexa Fluor 448 and by CD31 immunoreactivity. Nerve fibers, enteric glia, and macrophages were immunostained in the WGA-perfused colon. The blood vessels entered from the mesentery to the submucosa and branched into the capillary networks in the mucosa and muscularis externa. The capillary net formed anastomosed rings at the orifices of mucosa crypts, and the capillary rings surrounded the crypts individually in the proximal colon and more than two crypts in the distal colon. Microvessels in the muscularis externa with myenteric plexus were less dense than in the mucosa and formed loops. In the circular smooth muscle layer, microvessels were distributed in the proximal, but not the distal colon. Capillaries did not enter the enteric ganglia. There were no significant differences in microvascular volume per tissue volume between the proximal and distal colon either in the mucosa or muscularis externa containing the myenteric plexus. PGP9.5-, tyrosine hydroxylase-, and calcitonin gene-related peptide (CGRP)-immunoreactive nerve fibers were distributed along the vessels in the submucosa. In the mucosa, PGP9.5-, CGRP-, and vasoactive intestinal peptide (VIP)-immunoreactive nerves terminated close to the capillary rings, while cells and processes labeled by S100B and glial fibrillary acidic protein were distributed mainly in the lamina propria and lower portion of the mucosa. Dense Iba1 immunoreactive macrophages were closely adjacent to the mucosal capillary rings. There were a few macrophages, but no glia in apposition to microvessels in the submucosa and muscularis externa. In conclusion, in the mouse colon, (1) the differences in vasculature between the proximal and distal colon were associated with the morphology, but not the microvascular amount per tissue volume in the mucosa and muscle layers; (2) the colonic mucosa contained significantly more microvessels than the muscularis externa; and (3) there were more CGRP and VIP nerve fibers found close to microvessels in the mucosa and submucosa than in the muscle layers.
Collapse
Affiliation(s)
- Lixin Wang
- Department of Medicine, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States
| | - Pu-Qing Yuan
- Department of Medicine, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States
| | - Yvette Taché
- Department of Medicine, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States
| |
Collapse
|
10
|
Guo L, Mi JW, Zhang HC, Gao J, Zhang S, Li LX, Wu MY, Wang JM, Huang H. Endothelial-mesenchymal transition as a novel mechanism for generating myofibroblasts during wound healing and scarring. J Cosmet Dermatol 2023; 22:661-668. [PMID: 36237150 DOI: 10.1111/jocd.15466] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/09/2022] [Accepted: 10/12/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND The endothelial-mesenchymal transition (EndMT) is an important mechanism in tissue regeneration and the development of organ fibrosis. Whether EndMT occurs in wound healing and scarring remains unknown. MATERIALS AND METHODS The isolated cells from the normal dermal tissue and the wound tissue of mouse with full-thickness skin wound, and human scar tissue sections were performed with CD31/factorVII and α-SMA immunohistochemical staining and H and E staining. The ratio of factor VII or CD31/α-SMA double-positive cells in factor VII-positive cells was assessed in the isolated cells and in scar tissues. RESULTS In this study, we found that approximately 27-60% of ECs coexpressed VII factor and α-SMA in the isolated cells from the wound tissues of mice, which was significantly higher than that of normal dermal tissue cells. Accordingly, the number of CD31/α-SMA double-positive cells in mouse wound tissue sections was also significantly more than that in normal dermal tissue sections. In scar tissues, in addition to high-density microvessels, a large number of proliferative ECs in scar strama and CD31/α-SMA double-positive cells were also found. Approximately 46.82 to 84.11% of ECs and 68.77 to 95.25% of myofibroblasts coexpressed VII factor and α-SMA, and these two values in hypertrophic scars were significantly higher than those in keloids. CONCLUSION These results confirmed that ECs might contribute to the emergence of myofibroblasts in the wound and scar tissue via the process of EndMT.
Collapse
Affiliation(s)
- Ling Guo
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Jun-Wei Mi
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Hua-Cai Zhang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Jie Gao
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Shu Zhang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Luo-Xi Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Meng-Yu Wu
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Jian-Min Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| | - Hong Huang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Surgical Research, Daping Hospital, Army Medical University, Chongqing, China
| |
Collapse
|
11
|
Abstract
Tissue organoids hold enormous potential as tools for a variety of applications, including disease modeling and drug screening. To effectively mimic the native tissue environment, it is critical to integrate a microvasculature with the parenchyma and stroma. In addition to providing a means to physiologically perfuse the organoids, the microvasculature also contributes to the cellular dynamics of the tissue model via the cells of the perivascular niche, thereby further modulating tissue function. In this review, we discuss current and developing strategies for vascularizing organoids, consider tissue-specific vascularization approaches, discuss the importance of perfusion, and provide perspectives on the state of the field.
Collapse
|
12
|
Konopka J, Kołodziejek D, Flont M, Żuchowska A, Jastrzębska E, Brzózka Z. Exploring Endothelial Expansion on a Chip. Sensors (Basel) 2022; 22:9414. [PMID: 36502120 PMCID: PMC9741423 DOI: 10.3390/s22239414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/22/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Angiogenesis is the development of new blood vessels from the existing vasculature. Its malfunction leads to the development of cancers and cardiovascular diseases qualified by the WHO as a leading cause of death worldwide. A better understanding of mechanisms regulating physiological and pathological angiogenesis will potentially contribute to developing more effective treatments for those urgent issues. Therefore, the main goal of the following study was to design and manufacture an angiogenesis-on-a-chip microplatform, including cylindrical microvessels created by Viscous Finger Patterning (VFP) technique and seeded with HUVECs. While optimizing the VFP procedure, we have observed that lumen's diameter decreases with a diminution of the droplet's volume. The influence of Vascular Endothelial Growth Factor (VEGF) with a concentration of 5, 25, 50, and 100 ng/mL on the migration of HUVECs was assessed. VEGF's solution with concentrations varying from 5 to 50 ng/mL reveals high angiogenic potential. The spatial arrangement of cells and their morphology were visualized by fluorescence and confocal microscopy. Migration of HUVECs toward loaded angiogenic stimuli has been initiated after overnight incubation. This research is the basis for developing more complex vascularized multi-organ-on-a-chip microsystems that could potentially be used for drug screening.
Collapse
Affiliation(s)
- Joanna Konopka
- Faculty of Chemistry, Warsaw University of Technology, 00-661 Warszawa, Poland
| | - Dominik Kołodziejek
- Faculty of Chemistry, Warsaw University of Technology, 00-661 Warszawa, Poland
| | - Magdalena Flont
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warszawa, Poland
| | - Agnieszka Żuchowska
- Faculty of Chemistry, Warsaw University of Technology, 00-661 Warszawa, Poland
| | - Elżbieta Jastrzębska
- Faculty of Chemistry, Warsaw University of Technology, 00-661 Warszawa, Poland
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, 02-822 Warszawa, Poland
| | - Zbigniew Brzózka
- Faculty of Chemistry, Warsaw University of Technology, 00-661 Warszawa, Poland
| |
Collapse
|
13
|
Courson JA, Lam FW, Langlois KW, Rumbaut RE. Histone-stimulated platelet adhesion to mouse cremaster venules in vivo is dependent on von Willebrand factor. Microcirculation 2022; 29:e12782. [PMID: 36056797 PMCID: PMC9720896 DOI: 10.1111/micc.12782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/15/2022] [Accepted: 08/30/2022] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Extracellular histones are known mediators of platelet activation, inflammation, and thrombosis. Von Willebrand Factor (vWF) and Toll-like receptor 4 (TLR4) have been implicated in pro-inflammatory and prothrombotic histone responses. The objective of this study was to assess the role of vWF and TLR4 on histone-induced platelet adhesion in vivo. METHODS Intravital microscopy of the mouse cremaster microcirculation, in the presence of extracellular histones or saline control, was conducted in wild-type, vWF-deficient, and TLR4-deficient mice to assess histone-mediated platelet adhesion. Platelet counts following extracellular histone exposure were conducted. Platelets were isolated from vWF-deficient mice and littermates to assess the role of vWF on histone-induced platelet aggregation. RESULTS Histones promoted platelet adhesion to cremaster venules in vivo in wild-type animals, as well as in TLR4-deficient mice to a comparable degree. Histones did not lead to increased platelet adhesion in vWF-deficient mice, in contrast to littermate controls. In all genotypes, histones resulted in thrombocytopenia. Histone-induced platelet aggregation ex vivo was similar in vWF-deficient mice and littermate controls. CONCLUSIONS Histone-induced platelet adhesion to microvessels in vivo is vWF-dependent and TLR4-independent. Platelet-derived vWF was not necessary for histone-induced platelet aggregation ex vivo. These data are consistent with the notion that endothelial vWF, rather than platelet vWF, mediates histone-induced platelet adhesion in vivo.
Collapse
Affiliation(s)
- Justin A. Courson
- Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey Veterans Affairs Medical Center; Houston, TX USA,Department of Medicine, Baylor College of Medicine; Houston, TX USA
| | - Fong W. Lam
- Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey Veterans Affairs Medical Center; Houston, TX USA,Department of Pediatrics, Baylor College of Medicine; Houston, TX USA
| | - Kimberly W. Langlois
- Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey Veterans Affairs Medical Center; Houston, TX USA,Department of Medicine, Baylor College of Medicine; Houston, TX USA
| | - Rolando E. Rumbaut
- Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey Veterans Affairs Medical Center; Houston, TX USA,Department of Medicine, Baylor College of Medicine; Houston, TX USA,Department of Pediatrics, Baylor College of Medicine; Houston, TX USA,Corresponding Author: Rolando E. Rumbaut, Michael E. DeBakey VA Medical Center, 2002 Holcombe Blvd., Building 109, Houston, TX 77030
| |
Collapse
|
14
|
Wu YT, Bennett HC, Chon U, Vanselow DJ, Zhang Q, Muñoz-Castañeda R, Cheng KC, Osten P, Drew PJ, Kim Y. Quantitative relationship between cerebrovascular network and neuronal cell types in mice. Cell Rep 2022; 39:110978. [PMID: 35732133 PMCID: PMC9271215 DOI: 10.1016/j.celrep.2022.110978] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/22/2022] [Accepted: 05/26/2022] [Indexed: 11/21/2022] Open
Abstract
The cerebrovasculature and its mural cells must meet brain regional energy demands, but how their spatial relationship with different neuronal cell types varies across the brain remains largely unknown. Here we apply brain-wide mapping methods to comprehensively define the quantitative relationships between the cerebrovasculature, capillary pericytes, and glutamatergic and GABAergic neurons, including neuronal nitric oxide synthase-positive (nNOS+) neurons and their subtypes in adult mice. Our results show high densities of vasculature with high fluid conductance and capillary pericytes in primary motor sensory cortices compared with association cortices that show significant positive and negative correlations with energy-demanding parvalbumin+ and vasomotor nNOS+ neurons, respectively. Thalamo-striatal areas that are connected to primary motor sensory cortices also show high densities of vasculature and pericytes, suggesting dense energy support for motor sensory processing areas. Our cellular-resolution resource offers opportunities to examine spatial relationships between the cerebrovascular network and neuronal cell composition in largely understudied subcortical areas.
Collapse
Affiliation(s)
- Yuan-Ting Wu
- Department of Neural and Behavioral Sciences, The Pennsylvania State University, Hershey, PA 17033, USA
| | - Hannah C Bennett
- Department of Neural and Behavioral Sciences, The Pennsylvania State University, Hershey, PA 17033, USA
| | - Uree Chon
- Department of Neural and Behavioral Sciences, The Pennsylvania State University, Hershey, PA 17033, USA
| | - Daniel J Vanselow
- Department of Pathology, The Pennsylvania State University, Hershey, PA 17033, USA
| | - Qingguang Zhang
- Center for Neural Engineering, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | | | - Keith C Cheng
- Department of Pathology, The Pennsylvania State University, Hershey, PA 17033, USA
| | - Pavel Osten
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Patrick J Drew
- Center for Neural Engineering, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA; Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA; Department of Neurosurgery, The Pennsylvania State University, University Park, PA 16802, USA
| | - Yongsoo Kim
- Department of Neural and Behavioral Sciences, The Pennsylvania State University, Hershey, PA 17033, USA.
| |
Collapse
|
15
|
Acosta FM, Howland KK, Stojkova K, Hernandez E, Brey EM, Rathbone CR. Adipogenic Differentiation Alters Properties of Vascularized Tissue-Engineered Skeletal Muscle. Tissue Eng Part A 2022; 28:54-68. [PMID: 34102861 PMCID: PMC8812504 DOI: 10.1089/ten.tea.2021.0064] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Advances in the engineering of comprehensive skeletal muscle models in vitro will improve drug screening platforms and can lead to better therapeutic approaches for the treatment of skeletal muscle injuries. To this end, a vascularized tissue-engineered skeletal muscle (TE-SkM) model that includes adipocytes was developed to better emulate the intramuscular adipose tissue that is observed in skeletal muscles of patients with diseases such as diabetes. Muscle precursor cells cultured with and without microvessels derived from adipose tissue (microvascular fragments) were used to generate TE-SkM constructs, with and without a microvasculature, respectively. TE-SkM constructs were treated with adipogenic induction media to induce varying levels of adipogenesis. With a delayed addition of induction media to allow for angiogenesis, a robust microvasculature in conjunction with an increased content of adipocytes was achieved. The augmentation of vascularized TE-SkM constructs with adipocytes caused a reduction in maturation (compaction), mechanical integrity (Young's modulus), and myotube and vessel alignment. An increase in basal glucose uptake was observed in both levels of adipogenic induction, and a diminished insulin-stimulated glucose uptake was associated with the higher level of adipogenic differentiation and the greater number of adipocytes.
Collapse
Affiliation(s)
- Francisca M. Acosta
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, San Antonio, Texas, USA.,UTSA-UTHSCSA Joint Graduate Program in Biomedical Engineering, San Antonio, Texas, USA
| | - Kennedy K. Howland
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, San Antonio, Texas, USA
| | - Katerina Stojkova
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, San Antonio, Texas, USA
| | - Elizabeth Hernandez
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, San Antonio, Texas, USA
| | - Eric M. Brey
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, San Antonio, Texas, USA
| | - Christopher R. Rathbone
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, San Antonio, Texas, USA.,Address correspondence to: Christopher R. Rathbone, PhD, Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| |
Collapse
|
16
|
Liu YH, To M, Okudera T, Wada-Takahashi S, Takahashi SS, Su CY, Matsuo M. Advanced platelet-rich fibrin (A-PRF) has an impact on the initial healing of gingival regeneration after tooth extraction. J Oral Biosci 2021; 64:141-147. [PMID: 34808363 DOI: 10.1016/j.job.2021.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/11/2021] [Accepted: 11/15/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Platelet-rich fibrin (PRF) is widely used in wound healing because it contains several growth factors, including vascular endothelial growth factor (VEGF). In this study, we investigated the effects of advanced PRF (A-PRF) in early-stage gingival regeneration after tooth extraction. METHODS Blood sample was collected from females beagle dogs (age: 12 months) before tooth extraction for A-PRF preparation. All animals were sacrificed by perfusion-fixation on postoperative days 1, 3, and 7. The upper jaws were prepared for hematoxylin and eosin staining and immunostaining (for CD34 and VEGF). The lower jaw samples were prepared for scanning electron microscope observations. Blood flow in the gingiva before and after surgery was measured using laser Doppler flowmetry. RESULTS In the A-PRF group, a large number of microvessels were observed in the gingival tissue on postoperative day 1. The microvessels in the control group were fewer and sparse. Regarding the vascular resin cast, a large number of new blood vessels were observed on postoperative day 1 in the A-PRF group. A stronger CD34-positive signal was obtained around the blood vessels in the A-PRF group than in the control group. Further, a strong VEGF-positive signal was observed in the perivascular tissue in the A-PRF group. Gingival blood flow was significantly higher in the A-PRF group after surgery. CONCLUSION A-PRF had a positive impact on angiogenesis in the gingiva through the induction of VEGF expression. Thus, A-PRF may be beneficial for gingival tissue regeneration.
Collapse
Affiliation(s)
- Yu-Hao Liu
- Department of Clinical Oral Anatomy, Kanagawa Dental University, 82, Inaoka, Yokosuka, Kanagawa, 238-8580, Japan
| | - Masahiro To
- Department of Physiology, Kanagawa Dental University, 82, Inaoka, Yokosuka, Kanagawa, 238-8580, Japan
| | - Toshimitsu Okudera
- Department of Clinical Oral Anatomy, Kanagawa Dental University, 82, Inaoka, Yokosuka, Kanagawa, 238-8580, Japan
| | - Satoko Wada-Takahashi
- Department of Physiology, Kanagawa Dental University, 82, Inaoka, Yokosuka, Kanagawa, 238-8580, Japan
| | - Shun-Suke Takahashi
- Department of Pharmacology, Kanagawa Dental University, 82, Inaoka, Yokosuka, Kanagawa, 238-8580, Japan
| | - Chen-Yao Su
- Department of Clinical Oral Anatomy, Kanagawa Dental University, 82, Inaoka, Yokosuka, Kanagawa, 238-8580, Japan; International Society of Blood Biomaterials (ISBB), Sec.2, Linong Street, Taipei, 112 Taiwan
| | - Masato Matsuo
- Department of Clinical Oral Anatomy, Kanagawa Dental University, 82, Inaoka, Yokosuka, Kanagawa, 238-8580, Japan.
| |
Collapse
|
17
|
Dayton JR, Yuan Y, Pacumio LP, Dorflinger BG, Yoo SC, Olson MJ, Hernández-Suárez SI, McMahon MM, Cruz-Orengo L. Expression of IL-20 Receptor Subunit β Is Linked to EAE Neuropathology and CNS Neuroinflammation. Front Cell Neurosci 2021; 15:683687. [PMID: 34557075 PMCID: PMC8452993 DOI: 10.3389/fncel.2021.683687] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 08/13/2021] [Indexed: 12/24/2022] Open
Abstract
Considerable clinical evidence supports that increased blood-brain barrier (BBB) permeability is linked to immune extravasation of CNS parenchyma during neuroinflammation. Although BBB permeability and immune extravasation are known to be provoked by vascular endothelial growth factor-A (i.e., VEGF-A) and C-X-C motif chemokine ligand 12 (CXCL12), respectively, the mechanisms that link both processes are still elusive. The interleukin-20 (i.e., IL-20) cytokine signaling pathway was previously implicated in VEGF-mediated angiogenesis and is known to induce cellular response by way of signaling through IL-20 receptor subunit β (i.e., IL-20RB). Dysregulated IL-20 signaling is implicated in many inflammatory pathologies, but it's contribution to neuroinflammation has yet to be reported. We hypothesize that the IL-20 cytokine, and the IL cytokine subfamily more broadly, play a key role in CNS neuroinflammation by signaling through IL-20RB, induce VEGF activity, and enhance both BBB-permeability and CXCL12-mediated immune extravasation. To address this hypothesis, we actively immunized IL-20RB-/- mice and wild-type mice to induce experimental autoimmune encephalomyelitis (EAE) and found that IL-20RB-/- mice showed amelioration of disease progression compared to wild-type mice. Similarly, we passively immunized IL-20RB-/- mice and wild-type mice with myelin-reactive Th1 cells from either IL-20RB-/- and wild-type genotype. Host IL-20RB-/- mice showed lesser disease progression than wild-type mice, regardless of the myelin-reactive Th1 cells genotype. Using multianalyte bead-based immunoassay and ELISA, we found distinctive changes in levels of pro-inflammatory cytokines between IL-20RB-/- mice and wild-type mice at peak of EAE. We also found detectable levels of all cytokines of the IL-20 subfamily within CNS tissues and specific alteration to IL-20 subfamily cytokines IL-19, IL-20, and IL-24, expression levels. Immunolabeling of CNS region-specific microvessels confirmed IL-20RB protein at the spinal cord microvasculature and upregulation during EAE. Microvessels isolated from macaques CNS tissues also expressed IL-20RB. Moreover, we identified the expression of all IL-20 receptor subunits: IL-22 receptor subunit α-1 (IL-22RA1), IL-20RB, and IL-20 receptor subunit α (IL-20RA) in human CNS microvessels. Notably, human cerebral microvasculature endothelial cells (HCMEC/D3) treated with IL-1β showed augmented expression of the IL-20 receptor. Lastly, IL-20-treated HCMEC/D3 showed alterations on CXCL12 apicobasal polarity consistent with a neuroinflammatory status. This evidence suggests that IL-20 subfamily cytokines may signal at the BBB via IL-20RB, triggering neuroinflammation.
Collapse
Affiliation(s)
- Jacquelyn R Dayton
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States
| | - Yinyu Yuan
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States
| | - Lisa P Pacumio
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States
| | - Bryce G Dorflinger
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States
| | - Samantha C Yoo
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States
| | - Mariah J Olson
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States
| | - Sara I Hernández-Suárez
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States.,Bayer School of Natural and Environmental Sciences, Duquesne University of the Holy Spirit, Pittsburgh, PA, United States
| | - Moira M McMahon
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States.,Department of Molecular and Cell Biology, College of Letters and Science, University of California, Berkeley, Berkeley, CA, United States
| | - Lillian Cruz-Orengo
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, Davis, CA, United States
| |
Collapse
|
18
|
Walle L, Sudhoff H, Frerichs O, Todt I. Intraluminal Monitoring of Micro Vessels. A Surgical Feasibility Study. Front Surg 2021; 8:681797. [PMID: 34368216 PMCID: PMC8333698 DOI: 10.3389/fsurg.2021.681797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/28/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: Monitoring of vessel perfusion is of high clinical importance in vascular anastomosis of free flaps. Current sensor systems are based on different principles and show limitations in validity and accuracy. Fiber optic pressure sensors exhibit high accuracy and are small in size. The aim of the present study was to evaluate the surgical feasibility of intraluminal pressure (ILP) measurements with a fiber optic pressure sensor in an animal model. Methods: In a microsurgical setting we sedated 10 Wistar rats with weight adapted phenobarbital, xylazine, and fentanyl. We performed a surgical approach to A. carotis communis and V. jugularis and introduced a 600 μm fiber optic pressure sensor into the vessels followed by measuring the ILP. The sensor was stabilized by the surrounding tissue, and the vessels were closed. Results: In all cases, surgical placement was uneventful. Measurement of intra-venous and intra-arterial pressure was possible and stable over the whole measurement period of an hour. Conclusion: Fiber optic pressure measurement in microvessels is possible and surgically feasible. An application to monitor the perfusion of free flaps seems possible.
Collapse
Affiliation(s)
- Leonard Walle
- Department of Otolaryngology, Head and Neck Surgery, Medical School OWL, Bielefeld University, Bielefeld, Germany
| | - Holger Sudhoff
- Department of Plastic Surgery, Medical School OWL, Bielefeld University, Bielefeld, Germany
| | - Onno Frerichs
- Department of Otolaryngology, Head and Neck Surgery, Medical School OWL, Bielefeld University, Bielefeld, Germany
| | - Ingo Todt
- Department of Plastic Surgery, Medical School OWL, Bielefeld University, Bielefeld, Germany
| |
Collapse
|
19
|
Kaul M, Rubinstein I. Population-Based Magnetic Resonance Imaging: Earlier Detection of Hypertensive Cerebral Small Vessel Disease? Hypertension 2021; 78:540-542. [PMID: 34232679 DOI: 10.1161/hypertensionaha.121.17606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Malvika Kaul
- Department of Medicine, University of Illinois at Chicago (M.K., I.R.).,Medical and Research Services, Jesse Brown VA Medical Center, Chicago, IL (M.K., I.R.)
| | - Israel Rubinstein
- Department of Medicine, University of Illinois at Chicago (M.K., I.R.).,Medical and Research Services, Jesse Brown VA Medical Center, Chicago, IL (M.K., I.R.)
| |
Collapse
|
20
|
Jaleel Z, Blasberg E, Troiano C, Montanaro P, Mazzilli S, Gertje HP, Crossland NA, Platt M, Spiegel J. Association of vaping with decreased vascular endothelial growth factor expression and decreased microvessel density in cutaneous wound healing tissue in rats. Wound Repair Regen 2021; 29:1024-1034. [PMID: 34129265 DOI: 10.1111/wrr.12945] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 04/13/2021] [Accepted: 05/15/2021] [Indexed: 12/24/2022]
Abstract
Vaping is suggested to be a risk factor for poor wound healing akin to smoking. However, the molecular and histologic mechanisms underlying this postulation remain unknown. Our study sought to compare molecular and histologic changes in cutaneous flap and non-flap tissue between vaping, smoking and control cohorts. Animal study of 15 male Sprague-Dawley rats was randomized to three cohorts: negative control (n = 5), e-cigarette (n = 5) and cigarette (n = 5) and exposed to their respective treatments with serum cotinine monitoring. After 30 days, random pattern flaps were raised and healed for 2 weeks after which skin punch biopsies of flap and non-flap tissues were collected for quantitative-reverse transcription-polymerase chain reaction of three selected wound healing genes (transforming growth factor β [TGF-β], vascular endothelial growth factor [VEGF], matrix metalloproteinase-1 [MMP-1]); then, immunohistochemistry for CD68 expression, α-smooth muscle actin looking at microvessel density (MVD) and in situ hybridization to localize VEGF production were undertaken. In flap tissue, vaping (mean[SEM]) (0.61[0.07]) and smoking (0.70[0.04]) were associated with decreased fold change of VEGF expression compared with controls (0.91[0.03]) (p < 0.05, p < 0.05, respectively). In non-flap tissue, only vaping was associated with decreased VEGF expression (mean[SEM]) (0.81[0.07]), compared with controls (1.17[0.10]) (p < 0.05) with expression primarily localized to basal keratinocytes and dermal capillaries. Immunohistochemistry showed decreased MVD in smoking (0.27[0.06]) and vaping (0.26[0.04]) flap tissue compared to matched controls (0.65[0.14]) (p < 0.05, p < 0.05, respectively) and decreased areas of fibrosis compared with controls on gross histology. Vaping and smoking were similarly associated with decreased VEGF expression, MVD and fibrotic changes in flap tissue. The results suggest attenuated angiogenesis via decreased VEGF expression as a mechanism for poor wound healing in vaping-exposed rats.
Collapse
Affiliation(s)
- Zaroug Jaleel
- Boston University School of Medicine, Boston, Massachusetts, USA
| | - Elizabeth Blasberg
- Department of Otolaryngology/Head and Neck Surgery, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Chelsea Troiano
- Department of Otolaryngology/Head and Neck Surgery, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Paige Montanaro
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Sarah Mazzilli
- Boston University School of Medicine, Boston, Massachusetts, USA
| | - Hans Peter Gertje
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Nicholas A Crossland
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Michael Platt
- Boston University School of Medicine, Boston, Massachusetts, USA.,Department of Otolaryngology/Head and Neck Surgery, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Jeffrey Spiegel
- Boston University School of Medicine, Boston, Massachusetts, USA.,Department of Otolaryngology/Head and Neck Surgery, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA
| |
Collapse
|
21
|
Affiliation(s)
- Ilze Bot
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, the Netherlands
| |
Collapse
|
22
|
Han X, Ma L, Gu J, Wang D, Li J, Lou W, Saiyin H, Fu D. Basal microvilli define the metabolic capacity and lethal phenotype of pancreatic cancer. J Pathol 2021; 253:304-314. [PMID: 33159698 PMCID: PMC7898529 DOI: 10.1002/path.5588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/22/2020] [Accepted: 11/02/2020] [Indexed: 12/28/2022]
Abstract
Apical microvilli of polarized epithelial cells govern the absorption of metabolites and the transport of fluid in tissues. Previously, we reported that tall and dense basal microvilli present on the endothelial cells of pancreatic cancers, a lethal malignancy with a high metabolism and unusual hypomicrovascularity, contain nutrient trafficking vesicles and glucose; their length and density were related to the glucose uptake of pancreatic cancers in a small-scale analysis. However, the implications of basal microvilli on pancreatic cancers are unknown. Here, we evaluated the clinical implications of basal microvilli in 106 pancreatic cancers. We found that basal microvilli are a dominant change in pancreatic cancers. The presence of longer and denser basal microvilli on the microvessels in pancreatic cancer tissues positively correlated with increased glucose uptake and higher metastatic (or invasive) and proliferative potentials of neoplastic cells and vice versa. Clinically, postoperative patients with longer and denser basal microvilli were more prone to unfavorable pathological characteristics and dismal prognoses. They were even more refractory to adjuvant therapy than those with shorter and thinner basal microvilli were. Our findings show that basal microvilli define the metabolic capacity and lethal phenotype of pancreatic cancers. © 2020 The Authors. The Journal of Pathology published by John Wiley & Sons, Ltd. on behalf of The Pathological Society of Great Britain and Ireland.
Collapse
Affiliation(s)
- Xu Han
- Department of General SurgeryZhongshan Hospital, Fudan UniversityShanghaiPR China
| | - Lixiang Ma
- Department of Anatomy, Histology & Embryology, School of Medical SciencesFudan UniversityShanghaiPR China
| | - Jichun Gu
- Department of Pancreatic Surgery, Pancreatic Disease InstituteHuashan Hospital, Fudan UniversityShanghaiPR China
| | - Dansong Wang
- Department of General SurgeryZhongshan Hospital, Fudan UniversityShanghaiPR China
| | - Ji Li
- Department of Pancreatic Surgery, Pancreatic Disease InstituteHuashan Hospital, Fudan UniversityShanghaiPR China
| | - Wenhui Lou
- Department of General SurgeryZhongshan Hospital, Fudan UniversityShanghaiPR China
| | - Hexige Saiyin
- State Key Laboratory of Genetic Engineering, School of Life SciencesFudan UniversityShanghaiPR China
| | - Deliang Fu
- Department of Pancreatic Surgery, Pancreatic Disease InstituteHuashan Hospital, Fudan UniversityShanghaiPR China
| |
Collapse
|
23
|
Tang H, Abouleila Y, Mashaghi A. Lassa hemorrhagic shock syndrome-on-a-chip. Biotechnol Bioeng 2020; 118:1405-1410. [PMID: 33241859 PMCID: PMC7983903 DOI: 10.1002/bit.27636] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/17/2020] [Accepted: 11/23/2020] [Indexed: 12/25/2022]
Abstract
Lack of experimental human models hinders research on Lassa hemorrhagic fever and the development of treatment strategies. Here, we report the first chip-based model for Lassa hemorrhagic syndrome. The chip features a microvessel interfacing collagen network as a simple mimic for extracellular matrix, allowing for quantitative and real-time vascular integrity assessment. Luminal infusion of Lassa virus-like particles led to a dramatic increase in vascular permeability in a viral load-dependent manner. Using this platform, we showed that Fibrin-derived peptide FX06 can be used to suppress the vascular integrity loss. This simple chip-based model proved promising in the assessment of disease severity and provides an easy-to-use platform for future investigation of Lassa pathogenesis and drug development in a human-like setting.
Collapse
Affiliation(s)
- Huaqi Tang
- Medical Systems Biophysics and Bioengineering, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Yasmine Abouleila
- Medical Systems Biophysics and Bioengineering, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Alireza Mashaghi
- Medical Systems Biophysics and Bioengineering, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| |
Collapse
|
24
|
Kin T, Nagai K, Hayashi T, Takahashi K, Katanuma A. Efficacy of superb microvascular imaging of ultrasound for diagnosis of gallbladder lesion. J Hepatobiliary Pancreat Sci 2020; 27:977-983. [PMID: 33073532 DOI: 10.1002/jhbp.841] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/12/2020] [Accepted: 08/31/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND/PURPOSE The diagnosis of gallbladder (GB) lesions is occasionally difficult. Recently, superb microvascular imaging (SMI) of ultrasound has been developed as a novel microvascular imaging technique. We evaluated the feasibility of SMI for the diagnosis of GB lesions and compared microvascular imaging between benign and malignant GB lesions. METHODS Twenty patients with GB-protruded lesions or wall thickening who underwent SMI from August 2015 to July 2017 were included in this retrospective study. The measured outcomes were the quality of microvascular imaging when compared between normal SMI (N-SMI) and contrast-enhanced SMI (CE-SMI), and the microvascular findings (vascularity, vascular morphology, presence of branching, and presence of caliber change) when compared between benign and malignant GB lesions. RESULTS The quality of microvascular imaging of CE-SMI was evaluated as better than that of N-SMI, showing a significant difference (P < .001). From the CE-SMI microvascular findings, the evaluation of vascular morphology and the presence of caliber change showed a significant difference between benign and malignant GB lesions (P = .005, P < .001). CONCLUSIONS The evaluation of GB lesions using SMI was feasible with a contrast agent. Vascular morphology and the presence of caliber change may help in the differential diagnosis of GB lesions.
Collapse
Affiliation(s)
- Toshifumi Kin
- Center for Gastroenterology, Teine-Keijinkai Hospital, Sapporo, Japan
| | - Kazumasa Nagai
- Center for Gastroenterology, Teine-Keijinkai Hospital, Sapporo, Japan
| | - Tsuyoshi Hayashi
- Center for Gastroenterology, Teine-Keijinkai Hospital, Sapporo, Japan
| | | | - Akio Katanuma
- Center for Gastroenterology, Teine-Keijinkai Hospital, Sapporo, Japan
| |
Collapse
|
25
|
Salman MM, Marsh G, Kusters I, Delincé M, Di Caprio G, Upadhyayula S, de Nola G, Hunt R, Ohashi KG, Gray T, Shimizu F, Sano Y, Kanda T, Obermeier B, Kirchhausen T. Design and Validation of a Human Brain Endothelial Microvessel-on-a-Chip Open Microfluidic Model Enabling Advanced Optical Imaging. Front Bioeng Biotechnol 2020; 8:573775. [PMID: 33117784 PMCID: PMC7576009 DOI: 10.3389/fbioe.2020.573775] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/21/2020] [Indexed: 01/30/2023] Open
Abstract
We describe here the design and implementation of an in vitro microvascular open model system using human brain microvascular endothelial cells. The design has several advantages over other traditional closed microfluidic platforms: (1) it enables controlled unidirectional flow of media at physiological rates to support vascular function, (2) it allows for very small volumes which makes the device ideal for studies involving biotherapeutics, (3) it is amenable for multiple high resolution imaging modalities such as transmission electron microscopy (TEM), 3D live fluorescence imaging using traditional spinning disk confocal microscopy, and advanced lattice light sheet microscopy (LLSM). Importantly, we miniaturized the design, so it can fit within the physical constraints of LLSM, with the objective to study physiology in live cells at subcellular level. We validated barrier function of our brain microvessel-on-a-chip by measuring permeability of fluorescent dextran and a human monoclonal antibody. One potential application is to investigate mechanisms of transcytosis across the brain microvessel-like barrier of fluorescently-tagged biologics, viruses or nanoparticles.
Collapse
Affiliation(s)
- Mootaz M Salman
- Department of Cell Biology, Harvard Medical School, Boston, MA, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | | | - Ilja Kusters
- Department of Cell Biology, Harvard Medical School, Boston, MA, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Matthieu Delincé
- Department of Cell Biology, Harvard Medical School, Boston, MA, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Giuseppe Di Caprio
- Department of Cell Biology, Harvard Medical School, Boston, MA, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Srigokul Upadhyayula
- Department of Cell Biology, Harvard Medical School, Boston, MA, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Giovanni de Nola
- Department of Cell Biology, Harvard Medical School, Boston, MA, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Ronan Hunt
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Kazuka G Ohashi
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States
| | | | | | - Yasuteru Sano
- Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Takashi Kanda
- Yamaguchi University Graduate School of Medicine, Ube, Japan
| | | | - Tom Kirchhausen
- Department of Cell Biology, Harvard Medical School, Boston, MA, United States.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, United States.,Department of Pediatrics, Harvard Medical School, Boston, MA, United States
| |
Collapse
|
26
|
Abstract
To investigate the expression and clinical significance of aquaporin-1 (AQP1), vascular endothelial growth factor (VEGF) and microvessel density (MVD) in gastric cancer.A total of 79 gastric cancer patients who were admitted into Beijing Chao-Yang Hospital from January, 2018 to December, 2019 were involved in this study. Tumor specimens and para-cancerous normal tissues (> 2 cm away from the tumor) of all the enrolled patients were collected. Immunohistochemistry were performed to identify the expression of AQP1, VEGF, and MVD and the correlation between AQP1, VEGF, MVD, and clinicopathological parameters was analyzed.The expression of AQP1, VEGF and MVD in gastric cancer tissue was increased significantly compared with those in para-cancerous tissue (P < .05). AQP1, VEGF, and MVD were closely correlated with gastric cancer differentiation, lymph node metastasis, vascular tumor thrombosis and clinical stage (P < .05). Spearman correlation analysis showed that AQP1 was positively associated with VEGF expression (r = 0.497, P < .05). MVD was enhanced in VEGF or AQP1 positive cancer tissues compared with that in VEGF or AQP1 negative tissue (P < .05).Synergistic effect among AQP1, VEGF, and MVD is involved in occurrence and development of gastric cancer.
Collapse
|
27
|
Abstract
The vascular endothelium constitutes a semi-permeable barrier between blood and interstitial fluids. Since an augmented endothelial permeability is often associated to pathological states, understanding the molecular basis for its regulation is a crucial biomedical and clinical challenge. This review focuses on the processes controlling paracellular permeability that is the permeation of fluids between adjacent endothelial cells (ECs). Cytosolic calcium changes are often detected as early events preceding the alteration of the endothelial barrier (EB) function. For this reason, great interest has been devoted in the last decades to unveil the molecular mechanisms underlying calcium fluxes and their functional relationship with vessel permeability. Beyond the dicotomic classification between store-dependent and independent calcium entry at the plasma membrane level, the search for the molecular components of the related calcium-permeable channels revealed a difficult task for intrinsic and technical limitations. The contribution of redundant channel-forming proteins including members of TRP superfamily and Orai1, together with the very complex intracellular modulatory pathways, displays a huge variability among tissues and along the vascular tree. Moreover, calcium-independent events could significantly concur to the regulation of vascular permeability in an intricate and fascinating multifactorial framework.
Collapse
Affiliation(s)
- Tullio Genova
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Deborah Gaglioti
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Luca Munaron
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| |
Collapse
|
28
|
Jiao YQ, Huang P, Yan L, Sun K, Pan CS, Li Q, Fan JY, Ma ZZ, Han JY. YangXue QingNao Wan, a Compound Chinese Medicine, Attenuates Cerebrovascular Hyperpermeability and Neuron Injury in Spontaneously Hypertensive Rat: Effect and Mechanism. Front Physiol 2019; 10:1246. [PMID: 31632292 PMCID: PMC6779832 DOI: 10.3389/fphys.2019.01246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/12/2019] [Indexed: 02/06/2023] Open
Abstract
Objective The purpose of the study was to explore the effect of YangXue QingNao Wan (YXQNW), a compound Chinese medicine, on cerebrovascular hyperpermeability, neuronal injury, and related mechanisms in spontaneously hypertensive rat (SHR). Methods Fourteen-week-old male SHR were used, with Wistar Kyoto (WKY) rats as control. YXQNW (0.5 g/kg/day), enalapril (EN, 8 mg/kg/day), and nifedipine (NF, 7.1 mg/kg/day) were administrated orally for 4 weeks. To assess the effects of the YXQNW on blood pressure, the systolic blood pressure (SBP), diastolic blood pressure (DBP), and mean blood pressure (MBP) were measured. After administering the drugs for 4 weeks, the cerebral blood flow (CBF), albumin leakage from microvessels in middle cerebral artery (MCA)-dominated area, and the number and morphology of microvessels were assessed in the hippocampus area and cortex. Neuronal damage and apoptosis were assessed by Nissl staining and TUNEL staining. To assess the mechanisms of cerebrovascular hyperpermeability, we performed immunofluorescence and Western blot to assess the expression and integrity of cerebral microvascular tight junction (TJ) and caveolin-1 (Cav-1) in cortex. Energy metabolism and Src-MLC-MLCK pathway in cortex were assessed then for elucidating the underlying mechanism of the observed effect of YXQNW. Results Spontaneously hypertensive rat exhibited higher blood pressure, Evans blue (EB) extravasation, albumin leakage, increased brain water content, decreased CBF, perivascular edema, and neuronal apoptosis in the hippocampus and cortex, all of which were attenuated by YXQNW treatment. YXQNW inhibited the downregulation of TJ proteins, mitochondrial Complex I, Complex II, and Complex V, and upregulation of caveolin-1, inhibiting Src/MLCK/MLC signaling in SHR. YXQNW combined with EN + NF revealed a better effect for some outcomes compared with either YXQNW or EN + NF alone. Conclusion The overall result shows the potential of YXQNW to attenuate blood–brain barrier (BBB) breakdown in SHR, which involves regulation of energy metabolism and Src/MLCK/MLC signaling. This result provides evidence supporting the application of YXQNW as an adjuvant management for hypertensive patients to prevent hypertensive encephalopathy.
Collapse
Affiliation(s)
- Ying-Qian Jiao
- Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing, China.,Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Ping Huang
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Li Yan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Kai Sun
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Chun-Shui Pan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Quan Li
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Jing-Yu Fan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Zhi-Zhong Ma
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| | - Jing-Yan Han
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing, China.,Key Laboratory of Stasis and Phlegm, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,Academy of Integration of Chinese and Western Medicine, Peking University Health Science Center, Beijing, China.,Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing, China.,State Key Laboratory of Core Technology in Innovative Chinese Medicine, Beijing, China
| |
Collapse
|
29
|
Zhang L, Huang T, Teaw S, Bordey A. Hypervascularization in mTOR-dependent focal and global cortical malformations displays differential rapamycin sensitivity. Epilepsia 2019; 60:1255-1265. [PMID: 31125447 DOI: 10.1111/epi.15969] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 04/26/2019] [Accepted: 04/26/2019] [Indexed: 01/16/2023]
Abstract
OBJECTIVES Patients with mammalian target of rapamycin (mTOR)-dependent malformations of cortical development (MCDs) associated with seizures display hyperperfusion and increased vessel density of the dysmorphic cortical tissue. Some studies have suggested that the vascular defect occurred independently of seizures. Here, we further examined whether hypervascularization occurs in animal models of global and focal MCD with and without seizures, and whether it is sensitive to the mTOR blocker, rapamycin, that is approved for epilepsy treatment in tuberous sclerosis complex. METHODS We used two experimental models of mTOR-dependent MCD consisting of conditional transgenic mice containing Tsc1null cells in the forebrain generating a global malformation associated with seizures and of wild-type mice containing a focal malformation in the somatosensory cortex generated by in utero electroporation (IUE) that does not lead to seizures. Alterations in blood vessels and the effects of a 2-week-long rapamycin treatment on these phenotypes were assessed in juvenile mice. RESULTS Blood vessels in both the focal and global MCDs of postnatal day 14 mice displayed significant increase in vessel density, branching index, total vessel length, and decreased tissue lacunarity. In addition, rapamycin treatment (0.5 mg/kg, every 2 days) partially rescued vessel abnormalities in the focal MCD model, but it did not ameliorate the vessel abnormalities in the global MCD model that required higher rapamycin dosage for a partial rescue. SIGNIFICANCE Here, we identified hypervascularization in mTOR-dependent MCD in the absence of seizures in young mice, suggesting that increased angiogenesis occurs during development in parallel to alterations in corticogenesis. In addition, a predictive functional outcome is that dysplastic neurons forming MCD will have better access to oxygen and metabolic supplies via their closer proximity to blood vessels. Finally, the difference in rapamycin sensitivity between a focal and global MCD suggest that rapamycin treatment will need to be titrated to match the type of MCD.
Collapse
Affiliation(s)
- Longbo Zhang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Departments of Neurosurgery and Cellular & Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut
| | - Tianxiang Huang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Departments of Neurosurgery and Cellular & Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut
| | - Shannon Teaw
- Departments of Neurosurgery and Cellular & Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut
| | - Angélique Bordey
- Departments of Neurosurgery and Cellular & Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut
| |
Collapse
|
30
|
Govyadinov PA, Womack T, Eriksen JL, Chen G, Mayerich D. Robust Tracing and Visualization of Heterogeneous Microvascular Networks. IEEE Trans Vis Comput Graph 2019; 25:1760-1773. [PMID: 29993636 PMCID: PMC6360128 DOI: 10.1109/tvcg.2018.2818701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Advances in high-throughput imaging allow researchers to collect three-dimensional images of whole organ microvascular networks. These extremely large images contain networks that are highly complex, time consuming to segment, and difficult to visualize. In this paper, we present a framework for segmenting and visualizing vascular networks from terabyte-sized three-dimensional images collected using high-throughput microscopy. While these images require terabytes of storage, the volume devoted to the fiber network is ≈ 4 percent of the total volume size. While the networks themselves are sparse, they are tremendously complex, interconnected, and vary widely in diameter. We describe a parallel GPU-based predictor-corrector method for tracing filaments that is robust to noise and sampling errors common in these data sets. We also propose a number of visualization techniques designed to convey the complex statistical descriptions of fibers across large tissue sections-including commonly studied microvascular characteristics, such as orientation and volume.
Collapse
|
31
|
Kumagai M, Guo X, Wang KY, Izumi H, Tsukamoto M, Nakashima T, Tasaki T, Kurose N, Uramoto H, Sasaguri Y, Kohno K, Yamada S. Depletion of WNT10A Prevents Tumor Growth by Suppressing Microvessels and Collagen Expression. Int J Med Sci 2019; 16:416-423. [PMID: 30911276 PMCID: PMC6428976 DOI: 10.7150/ijms.26997] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 09/06/2018] [Indexed: 01/13/2023] Open
Abstract
Background: We recently reported that WNT10A plays a pivotal role in wound healing by regulating collagen expression/synthesis, as the depletion of WNT10A dramatically delays skin ulcer formation. WNT signaling also has a close correlation with the cancer microenvironment and proliferation, since tumors are actually considered to be 'unhealing' or 'overhealing' wounds. To ascertain the in vivo regulatory functions of WNT10A in tumor growth, we examined the net effects of WNT10A depletion using Wnt10a-deficient mice (Wnt10a -/-). Methods and Results: We subjected C57BL/6J wild-type (WT) or Wnt10a -/- mice to murine melanoma B16-F10 cell transplantation. Wnt10a -/- mice showed a significantly smaller volume of transplanted melanoma as well as fewer microvessels and less collagen expression and more necrosis than WT mice. Conclusions: Taken together, our observations suggest that critical in vivo roles of Wnt10a-depleted anti-stromagenesis prevent tumor growth, in contrast with true wound healing/scarring.
Collapse
Affiliation(s)
- Motona Kumagai
- Department of Pathology and Laboratory Medicine, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Xin Guo
- Department of Pathology and Laboratory Medicine, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Ke-Yong Wang
- Shared-Use Research Center, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Hiroto Izumi
- Department of Occupational Pneumology, School of Medicine, University of Occupational and Environmental Health
| | - Manabu Tsukamoto
- Department of Orthopaedic Surgery, School of Medicine, University of Occupational and Environmental Health
| | - Tamiji Nakashima
- Department of Human, Information and Life Sciences, School of Medicine, University of Occupational and Environmental Health
| | - Takashi Tasaki
- Shared-Use Research Center, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan
| | - Nozomu Kurose
- Department of Pathology and Laboratory Medicine, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Hidetaka Uramoto
- Department of Thoracic Surgery, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Yasuyuki Sasaguri
- Department of Pathology and Cell Biology, School of Medicine, University of Occupational and Environmental Health.,Laboratory of Pathology, Fukuoka Tokushukai Hospital, Fukuoka 816-0864, Japan
| | | | - Sohsuke Yamada
- Department of Pathology and Laboratory Medicine, Kanazawa Medical University, Ishikawa 920-0293, Japan
| |
Collapse
|
32
|
Zhou Y, Tang S, Cao Y, Zhang J. [Application of transcutaneous oxygen pressure in scar assessment]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2018; 32:1615-1618. [PMID: 30569693 DOI: 10.7507/1002-1892.201810098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objective To review the application and research progress of transcutaneous oxygen pressure (TcPO 2) in scar assessment. Methods The original articles about scar and TcPO 2 were reviewed and analyzed. Results Hypoxia environment plays an important role in the progression of scar tissue. TcPO 2 can accurately reflect the oxygen tension of scar tissue, which is of great significance in the assessment of scar maturity, the guidance of scar treatment, and the study of correlations between hypoxia and the progression of scar. Conclusion TcPO 2 measurement is important in the study of scar evaluation, treatment, and correlation between hypoxia and scar formation.
Collapse
Affiliation(s)
- Yi Zhou
- Nanjing Medical University, Nanjing Jiangsu, 211166, P.R.China
| | - Songjia Tang
- Department of Medical Cosmetology, the Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou Zhejiang, 310006, P.R.China
| | - Yilin Cao
- Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, P.R.China
| | - Jufang Zhang
- Department of Medical Cosmetology, the Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou Zhejiang, 310006,
| |
Collapse
|
33
|
Zhang L, Qian Z, Tahtinen M, Qi S, Zhao F. Prevascularization of natural nanofibrous extracellular matrix for engineering completely biological three-dimensional prevascularized tissues for diverse applications. J Tissue Eng Regen Med 2018; 12:e1325-e1336. [PMID: 28714140 PMCID: PMC5771986 DOI: 10.1002/term.2512] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 06/29/2017] [Accepted: 07/11/2017] [Indexed: 01/10/2023]
Abstract
Self-sustainability after implantation is one of the critical obstacles facing large engineered tissues. A preformed functional vascular network provides an effective solution for solving the mass transportation problem. With the support of mural cells, endothelial cells (ECs) can form microvessels within engineered tissues. As an important mural cell, human mesenchymal stem cells (hMSCs) not only stabilize the engineered microvessel network, but also preserve their multi-potency when grown under optimal culture conditions. A prevascularized hMSC/extracellular matrix (ECM) sheet fabricated by the combination of hMSCs, ECs and a naturally derived nanofibrous ECM scaffold offers great opportunity for engineering mechanically strong and completely biological three-dimensional prevascularized tissues. The objective of this study was to create a prevascularized hMSC/ECM sheet by co-culturing ECs and hMSCs on a nanofibrous ECM scaffold. Physiologically low oxygen (2% O2 ) was introduced during the 7 day hMSC culture to preserve the stemness of hMSCs and thereby their capability to secrete angiogenic factors. The ECs were then included to form microvessels under normal oxygen (20% O2 ) for up to 7 days. The results showed that a branched and mature vascular network was formed in the co-culture condition. Angiogenic factors vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF) and angiopoietin-1 (Ang-1) were significantly increased by low-oxygen culture of hMSCs, which further stabilized and supported the maturation of microvessels. A differentiation assay of the prevascularized ECM scaffold demonstrated a retained hMSC multi-potency in the hypoxia cultured samples. The prevascularized hMSC/ECM sheet holds great promise for engineering three-dimensional prevascularized tissues for diverse applications.
Collapse
Affiliation(s)
- Lijun Zhang
- Department of Burns, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
- Department of Biomedical Engineering, Michigan Technological University, Houghton, Michigan, USA
| | - Zichen Qian
- Department of Biomedical Engineering, Michigan Technological University, Houghton, Michigan, USA
| | - Mitchell Tahtinen
- Department of Biomedical Engineering, Michigan Technological University, Houghton, Michigan, USA
| | - Shaohai Qi
- Department of Burns, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Feng Zhao
- Department of Biomedical Engineering, Michigan Technological University, Houghton, Michigan, USA
| |
Collapse
|
34
|
Polívka J Jr, Pešta M, Pitule P, Hes O, Holubec L, Polívka J, Kubíková T, Tonar Z. IDH1 mutation is associated with lower expression of VEGF but not microvessel formation in glioblastoma multiforme. Oncotarget 2018; 9:16462-76. [PMID: 29662659 DOI: 10.18632/oncotarget.24536] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 02/10/2018] [Indexed: 12/18/2022] Open
Abstract
Introduction Glioblastoma multiforme (GBM) represents the most malignant primary brain tumor characterized by pathological vascularization. Mutations in isocitrate dehydrogenases 1 and 2 (IDH1 and IDH2) were observed in GBM. We aimed to assess the intra-tumor hypoxia, angiogenesis and microvessel formation in GBM and to find their associations with IDH1 mutation status and patients prognosis. Methods 52 patients with a diagnosis of GBM were included into the study. IDH1 R132H mutation was assessed by RT-PCR from FFPE tumor samples obtained during surgery. The expression of markers of hypoxia (HIF2α), angiogenesis (VEGF), tumor microvascularity (CD31, CD34, vWF, CD105), and proliferation (Ki-67) were assessed immunohistochemically (IHC). IDH1 mutation and IHC markers were correlated with the patient survival. Results 20 from 52 GBM tumor samples comprised IDH1 R132H mutation (38.5%). The majority of mutated tumors were classified as secondary glioblastomas (89.9%). Patients with IDH1 mutated tumors experienced better progression-free survival (P = 0.037) as well as overall survival (P = 0.035) compared with wild type tumors. The significantly lower expression of VEGF was observed in GBM with IDH1 mutation than in wild type tumors (P = 0.01). No such association was found for microvascular markers. The increased expression of newly-formed microvessels (ratio CD105/CD31) in tumor samples was associated with worse patient’s progression-free survival (P = 0.026). Summary No increase in HIF/VEGF-mediated angiogenesis was observed in IDH1-mutated GBM compared with IDH1 wild type tumors. The histological assessment of the portion of newly-formed microvessels in tumor tissue can be used for the prediction of GBM patient’s prognosis.
Collapse
|
35
|
Abstract
Microvessels promote proliferation of tumor cells by delivering oxygen and nutrients, but rapid growth of tumors results in unmet demands for oxygen and nutrients, thereby creating a hypoxia microenvironment. Under hypoxic conditions, vascular endothelial cells (ECs) initiate the formation of immature and abnormal microvasculature. This results in leakage and tortuosity that facilitates tumor cell invasion, metastasis and resistance to cytotoxic treatment. Radiotherapy (RT) is a vital tumor treatment modality. Currently, more than 60% of patients with malignant tumors receive RT at certain points during their treatment. Hypoxia induced by abnormal microvessels can hamper the cytotoxic effect of ionizing radiation, particularly, stereotactic body radiotherapy (SBRT). Anti-angiogenesis (AA) agents are known to reduce and renormalize microvessels in tumors, and hence alleviate hypoxia. The combination of AA agents with SBRT may have a synergistic role in inhibiting the growth of tumors. On the contrary, large doses of irradiation may affect tumor microvessels itself. In this review, we aim to clarify the relationship between SBRT and microvessel formation in tumors. In addition, we provide a retrospective analysis of the combination therapy involving SBRT and AA agents in preclinical and clinical practice to define its role in anti-tumor treatment.
Collapse
Affiliation(s)
- Xiaowen Sun
- Department of Thoracic Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Lei Deng
- Department of Thoracic Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - You Lu
- Department of Thoracic Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|
36
|
Abstract
SIGNIFICANCE Successful matching of cardiac metabolism to perfusion is accomplished primarily through vasodilation of the coronary resistance arterioles, but the mechanism that achieves this effect changes significantly as aging progresses and involves the contribution of reactive oxygen species (ROS). Recent Advances: A matricellular protein, thrombospondin-1 (Thbs-1), has been shown to be a prolific contributor to the production and modulation of ROS in large conductance vessels and in the peripheral circulation. Recently, the presence of physiologically relevant circulating Thbs-1 levels was proven to also disrupt vasodilation to nitric oxide (NO) in coronary arterioles from aged animals, negatively impacting coronary blood flow reserve. CRITICAL ISSUES This review seeks to reconcile how ROS can be successfully utilized as a substrate to mediate vasoreactivity in the coronary microcirculation as "normal" aging progresses, but will also examine how Thbs-1-induced ROS production leads to dysfunctional perfusion and eventual ischemia and why this is more of a concern in advancing age. FUTURE DIRECTIONS Current therapies that may effectively disrupt Thbs-1 and its receptor CD47 in the vascular wall and areas for future exploration will be discussed. Antioxid. Redox Signal. 27, 785-801.
Collapse
Affiliation(s)
- Amanda J LeBlanc
- Department of Physiology, Cardiovascular Innovation Institute, University of Louisville , Louisville, Kentucky
| | - Natia Q Kelm
- Department of Physiology, Cardiovascular Innovation Institute, University of Louisville , Louisville, Kentucky
| |
Collapse
|
37
|
Sackstein R, Schatton T, Barthel SR. T-lymphocyte homing: an underappreciated yet critical hurdle for successful cancer immunotherapy. J Transl Med 2017; 97:669-697. [PMID: 28346400 PMCID: PMC5446300 DOI: 10.1038/labinvest.2017.25] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 01/17/2017] [Accepted: 01/22/2017] [Indexed: 12/13/2022] Open
Abstract
Advances in cancer immunotherapy have offered new hope for patients with metastatic disease. This unfolding success story has been exemplified by a growing arsenal of novel immunotherapeutics, including blocking antibodies targeting immune checkpoint pathways, cancer vaccines, and adoptive cell therapy (ACT). Nonetheless, clinical benefit remains highly variable and patient-specific, in part, because all immunotherapeutic regimens vitally hinge on the capacity of endogenous and/or adoptively transferred T-effector (Teff) cells, including chimeric antigen receptor (CAR) T cells, to home efficiently into tumor target tissue. Thus, defects intrinsic to the multi-step T-cell homing cascade have become an obvious, though significantly underappreciated contributor to immunotherapy resistance. Conspicuous have been low intralesional frequencies of tumor-infiltrating T-lymphocytes (TILs) below clinically beneficial threshold levels, and peripheral rather than deep lesional TIL infiltration. Therefore, a Teff cell 'homing deficit' may arguably represent a dominant factor responsible for ineffective immunotherapeutic outcomes, as tumors resistant to immune-targeted killing thrive in such permissive, immune-vacuous microenvironments. Fortunately, emerging data is shedding light into the diverse mechanisms of immune escape by which tumors restrict Teff cell trafficking and lesional penetrance. In this review, we scrutinize evolving knowledge on the molecular determinants of Teff cell navigation into tumors. By integrating recently described, though sporadic information of pivotal adhesive and chemokine homing signatures within the tumor microenvironment with better established paradigms of T-cell trafficking under homeostatic or infectious disease scenarios, we seek to refine currently incomplete models of Teff cell entry into tumor tissue. We further summarize how cancers thwart homing to escape immune-mediated destruction and raise awareness of the potential impact of immune checkpoint blockers on Teff cell homing. Finally, we speculate on innovative therapeutic opportunities for augmenting Teff cell homing capabilities to improve immunotherapy-based tumor eradication in cancer patients, with special focus on malignant melanoma.
Collapse
Affiliation(s)
- Robert Sackstein
- Department of Dermatology, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, 02115, USA,Department of Medicine, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, 02115, USA,Harvard Skin Disease Research Center, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, 02115, USA,Program of Excellence in Glycosciences, Harvard Medical School, 77 Avenue Louis Pasteur, Rm 671, Boston, MA 02115, USA
| | - Tobias Schatton
- Department of Dermatology, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, 02115, USA,Harvard Skin Disease Research Center, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, 02115, USA,Harvard Stem Cell Institute, Harvard Medical School, Boston, MA 02115, USA,Department of Medicine, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Steven R. Barthel
- Department of Dermatology, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, 02115, USA,Harvard Skin Disease Research Center, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, 02115, USA,Harvard Stem Cell Institute, Harvard Medical School, Boston, MA 02115, USA,Correspondence to: Dr. Steven R. Barthel, Harvard Institutes of Medicine, Rm. 673B, 77 Avenue Louis Pasteur, Boston, MA 02115;
| |
Collapse
|
38
|
Ni XG, Zhang QQ, Wang GQ. Classification of nasopharyngeal microvessels detected by narrow band imaging endoscopy and its role in the diagnosis of nasopharyngeal carcinoma. Acta Otolaryngol 2017; 137:546-553. [PMID: 27841051 DOI: 10.1080/00016489.2016.1253869] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
CONCLUSIONS The new NBI classification of nasopharyngeal mucosal microvessels was helpful in differential diagnosis for benign and malignant lesions of the nasopharyngeal region. NBI endoscopy facilitates the detection of superficial nasopharyngeal lesions and might enable early diagnoses of NPC. OBJECTIVES To propose a new microvessel diagnostic classification using narrow band imaging (NBI) endoscopy and to investigate the role of an NBI classification in the diagnosis of nasopharyngeal carcinoma (NPC). METHODS Between January 2009 and December 2010, a total of 290 patients with a suspected nasopharyngeal tumor were enrolled in this study. The NBI endoscopic system was used to examine the nasopharynx. Each lesion was observed by NBI endoscopy and judged according to the detailed morphologic findings of epithelial microvessels. The superficial microvessel patterns were classified into five types (types I-V). The diagnostic effectiveness of NBI for benign and malignant nasopharyngeal lesions was evaluated. RESULTS Approximately 93.5% (29/31) of lymphoid hyperplasia appeared as the type II microvessel pattern under NBI endoscopy, whereas 96.2% (51/53) of nasopharyngeal radiation-induced inflammation exhibited the type III or IV microvessel pattern. The characteristics of NPC under NBI endoscopy mainly appeared as a type V microvessel pattern (79.5%, 167/210), and the sensitivity, specificity, predictive value (PPV), and negative predictive value (NPV) of type V in the diagnosis of NPC were 79.5%, 91.3%, 96.0%, and 62.9%, respectively. NBI endoscopy could significantly improve the detection of superficial lesions (χ2 = 12.789, p = .000).
Collapse
Affiliation(s)
- Xiao-Guang Ni
- Department of Endoscopy, Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, PR China
| | - Qing-Qing Zhang
- Department of Endoscopy, Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, PR China
| | - Gui-Qi Wang
- Department of Endoscopy, Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, PR China
| |
Collapse
|
39
|
Abstract
The blood-brain barrier plays an important role in neuroprotection; however, it can be a major obstacle for drug delivery to the brain. This barrier primarily resides in the brain capillaries and functions as an interface between the brain and peripheral blood circulation. Several anatomical and biochemical elements of the blood-brain barrier are essential to regulate the permeability of nutrients, ions, hormones, toxic metabolites, and xenobiotics into and out of the brain. In particular, high expression of ATP-driven efflux transporters at the blood-brain barrier is a major obstacle in the delivery of CNS pharmacotherapeutics to the brain. The complete understanding of these elements can offer insights on how to modulate barrier functions for neuroprotection against CNS drug toxicity and to enhance drug delivery to the brain. In the literature, preclinical models of the blood-brain barrier are widely utilized to predict drug pharmacokinetics and pharmacodynamics properties in the brain. In addition, these models are essential tools to investigate cellular mechanisms and novel interventions that alter barrier function and permeability. This unit presents procedures to isolate fresh and viable rodent brain capillaries for the assessment of ex vivo transport activity at the blood-brain barrier. © 2017 by John Wiley & Sons, Inc.
Collapse
Affiliation(s)
- Gary N Y Chan
- National Institutes of Health, National Institute of Environmental Health Sciences, Intracellular Regulatory Group, Signal Transduction Laboratory, Research Triangle Park, North Carolina, USA
| | - Ronald E Cannon
- National Institutes of Health, National Institute of Environmental Health Sciences, Intracellular Regulatory Group, Signal Transduction Laboratory, Research Triangle Park, North Carolina, USA
| |
Collapse
|
40
|
Jureidini R, da Cunha JEM, Takeda F, Namur GN, Ribeiro TC, Patzina R, Figueira ERR, Ribeiro U, Bacchella T, Cecconello I. Evaluation of microvessel density and p53 expression in pancreatic adenocarcinoma. Clinics (Sao Paulo) 2016; 71:315-9. [PMID: 27438564 PMCID: PMC4930662 DOI: 10.6061/clinics/2016(06)05] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 03/21/2016] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE To evaluate the prognostic significance of microvessel density and p53 expression in pancreatic cancer. METHODS Between 2008 and 2012, 49 patients with pancreatic adenocarcinoma underwent resection with curative intention. The resected specimens were immunohistochemically stained with anti-p53 and anti-CD34 antibodies. Microvessel density was assessed by counting vessels within ten areas of each tumoral section a highpower microscope. RESULTS The microvessel density ranged from 21.2 to 54.2 vessels/mm2. Positive nuclear staining for p53 was found in 20 patients (40.6%). The overall median survival rate after resection was 24.1 months and there were no differences in survival rates related to microvessel density or p53 positivity. Microvessel density was associated with tumor diameter greater than 3.0 cm and with R0 resection failure. CONCLUSIONS Microvessel density was associated with R1 resection and with larger tumors. p53 expression was not correlated with intratumoral microvessel density in pancreatic adenocarcinoma.
Collapse
Affiliation(s)
- Ricardo Jureidini
- Faculdade de Medicina da Universidade de São Paulo, Departamento de Gastroenterologia
- E-mail:
| | | | - Flavio Takeda
- Faculdade de Medicina da Universidade de São Paulo, Departamento de Gastroenterologia
| | | | - Thiago Costa Ribeiro
- Faculdade de Medicina da Universidade de São Paulo, Departamento de Gastroenterologia
| | | | - Estela RR Figueira
- Faculdade de Medicina da Universidade de São Paulo, Departamento de Gastroenterologia
| | - Ulysses Ribeiro
- Faculdade de Medicina da Universidade de São Paulo, Departamento de Gastroenterologia
| | - Telesforo Bacchella
- Faculdade de Medicina da Universidade de São Paulo, Departamento de Gastroenterologia
| | - Ivan Cecconello
- Faculdade de Medicina da Universidade de São Paulo, Departamento de Gastroenterologia
| |
Collapse
|
41
|
Xu S, Li X, Liu Y, He P. Development and Characterization of In Vitro Microvessel Network and Quantitative Measurements of Endothelial [Ca2+]i and Nitric Oxide Production. J Vis Exp 2016:54014. [PMID: 27286521 PMCID: PMC4927704 DOI: 10.3791/54014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Endothelial cells (ECs) lining the blood vessel walls in vivo are constantly exposed to flow, but cultured ECs are often grown under static conditions and exhibit a pro-inflammatory phenotype. Although the development of microfluidic devices has been embraced by engineers over two decades, their biological applications remain limited. A more physiologically relevant in vitro microvessel model validated by biological applications is important to advance the field and bridge the gaps between in vivo and in vitro studies. Here, we present detailed procedures for the development of cultured microvessel network using a microfluidic device with a long-term perfusion capability. We also demonstrate its applications for quantitative measurements of agonist-induced changes in EC [Ca(2+)]i and nitric oxide (NO) production in real time using confocal and conventional fluorescence microscopy. The formed microvessel network with continuous perfusion showed well-developed junctions between ECs. VE-cadherin distribution was closer to that observed in intact microvessels than statically cultured EC monolayers. ATP-induced transient increases in EC [Ca(2+)]i and NO production were quantitatively measured at individual cell levels, which validated the functionality of the cultured microvessels. This microfluidic device allows ECs to grow under a well-controlled, physiologically relevant flow, which makes the cell culture environment closer to in vivo than that in the conventional, static 2D cultures. The microchannel network design is highly versatile, and the fabrication process is simple and repeatable. The device can be easily integrated to the confocal or conventional microscopic system enabling high resolution imaging. Most importantly, because the cultured microvessel network can be formed by primary human ECs, this approach will serve as a useful tool to investigate how pathologically altered blood components from patient samples affect human ECs and provide insight into clinical issues. It also can be developed as a platform for drug screening.
Collapse
Affiliation(s)
- Sulei Xu
- Department of Cellular and Molecular Physiology, College of Medicine, Penn State University
| | - Xiang Li
- Department of Cellular and Molecular Physiology, College of Medicine, Penn State University
| | - Yuxin Liu
- Lane Department of Computer Science and Electrical Engineering, West Virginia University
| | - Pingnian He
- Department of Cellular and Molecular Physiology, College of Medicine, Penn State University;
| |
Collapse
|
42
|
Wilhelm I, Nyúl-Tóth Á, Suciu M, Hermenean A, Krizbai IA. Heterogeneity of the blood-brain barrier. Tissue Barriers 2016; 4:e1143544. [PMID: 27141424 DOI: 10.1080/21688370.2016.1143544] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 01/08/2016] [Accepted: 01/12/2016] [Indexed: 01/08/2023] Open
Abstract
The brain microvascular network is comprised of capillaries, arterioles and venules, all of which retain - although to a different extent - blood-brain barrier (BBB) properties. Capillaries constitute the largest and tightest microvasculature. In contrast, venules have a looser junctional arrangement, while arterioles have a lower expression of P-gp. Development and maintenance of the BBB depends on the interaction of cerebral endothelial cells with pericytes and astrocytes, which are all heterogeneous in different regions of the central nervous system. At the level of circumventricular organs microvessels are permeable, containing fenestrations and discontinuous tight junctions. In addition, the blood-spinal cord barrier - where the number of pericytes is lower and expression of junctional proteins is reduced - is also more permeable than the BBB. However, much less is known about the cellular, molecular and functional differences among other regions of the brain. This review summarizes our current knowledge on the heterogeneity of the brain microvasculature.
Collapse
Affiliation(s)
- Imola Wilhelm
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences ; Szeged, Hungary
| | - Ádám Nyúl-Tóth
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences ; Szeged, Hungary
| | - Maria Suciu
- Institute of Life Sciences, Vasile Goldis Western University of Arad ; Arad, Romania
| | - Anca Hermenean
- Institute of Life Sciences, Vasile Goldis Western University of Arad ; Arad, Romania
| | - István A Krizbai
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences; Szeged, Hungary; Institute of Life Sciences, Vasile Goldis Western University of Arad; Arad, Romania
| |
Collapse
|
43
|
Gu YH, Kanazawa M, Hung SY, Wang X, Fukuda S, Koziol JA, Del Zoppo GJ. Cathepsin L acutely alters microvessel integrity within the neurovascular unit during focal cerebral ischemia. J Cereb Blood Flow Metab 2015; 35:1888-900. [PMID: 26198177 DOI: 10.1038/jcbfm.2015.170] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
During focal cerebral ischemia, the degradation of microvessel basal lamina matrix occurs acutely and is associated with edema formation and microhemorrhage. These events have been attributed to matrix metalloproteinases (MMPs). However, both known protease generation and ligand specificities suggest other participants. Using cerebral tissues from a non-human primate focal ischemia model and primary murine brain endothelial cells, astrocytes, and microglia in culture, the effects of active cathepsin L have been defined. Within 2 hours of ischemia onset cathepsin L, but not cathepsin B, activity appears in the ischemic core, around microvessels, within regions of neuron injury and cathepsin L expression. In in vitro studies, cathepsin L activity is generated during experimental ischemia in microglia, but not astrocytes or endothelial cells. In the acidic ischemic core, cathepsin L release is significantly increased with time. A novel ex vivo assay showed that cathepsin L released from microglia during ischemia degrades microvessel matrix, and interacts with MMP activity. Hence, the loss of microvessel matrix during ischemia is explained by microglial cathepsin L release in the acidic core during injury evolution. The roles of cathepsin L and its interactions with specific MMP activities during ischemia are relevant to strategies to reduce microvessel injury and hemorrhage.
Collapse
|
44
|
Kumar RMR, Arlt MJ, Kuzmanov A, Born W, Fuchs B. Sunitinib malate (SU-11248) reduces tumour burden and lung metastasis in an intratibial human xenograft osteosarcoma mouse model. Am J Cancer Res 2015; 5:2156-2168. [PMID: 26328246 PMCID: PMC4548327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/02/2015] [Indexed: 06/04/2023] Open
Abstract
Osteosarcoma is a rare type of cancer that commonly occurs as a primary bone tumour in children and adolescents and is associated with a poor clinical outcome. Despite complex treatment protocols, including chemotherapy combined with surgical resection, the prognosis for patients with osteosarcoma and metastases remains poor and more effective therapies are required. In this study, we evaluated the therapeutic efficacy of sunitinib malate, a wide-spectrum tyrosine kinase inhibitor, in a preclinical mouse model of osteosarcoma. Sunitinib significantly inhibited proliferation, provoked apoptosis and induced G2/M cell cycle arrest in the human osteosarcoma cell lines SaOS-2 and 143B in vitro. Importantly, sunitinib treatment significantly reduced tumour burden, microvessel density and suppressed pulmonary metastasis in a 143B cell-derived intratibial osteosarcoma model in SCID mice. Sunitinib significantly decreased primary tumor tissue proliferation and reduced tumor vasculature. Our study indicates that sunitinib has potential for effective treatment of metastasizing osteosarcoma and provides the framework for future clinical trials with sunitinib alone or in combination with conventional and other novel therapeutics aiming at increased treatment efficacy and improved patient outcome.
Collapse
Affiliation(s)
- Ram Mohan Ram Kumar
- Department of Orthopaedics, Laboratory for Orthopaedic Research, Balgrist University Hospital, University of Zurich Zurich, Switzerland
| | - Matthias Je Arlt
- Department of Orthopaedics, Laboratory for Orthopaedic Research, Balgrist University Hospital, University of Zurich Zurich, Switzerland
| | - Aleksandar Kuzmanov
- Department of Orthopaedics, Laboratory for Orthopaedic Research, Balgrist University Hospital, University of Zurich Zurich, Switzerland
| | - Walter Born
- Department of Orthopaedics, Laboratory for Orthopaedic Research, Balgrist University Hospital, University of Zurich Zurich, Switzerland
| | - Bruno Fuchs
- Department of Orthopaedics, Laboratory for Orthopaedic Research, Balgrist University Hospital, University of Zurich Zurich, Switzerland
| |
Collapse
|
45
|
Hawkins BT, Gu YH, Izawa Y, del Zoppo GJ. Dabigatran abrogates brain endothelial cell permeability in response to thrombin. J Cereb Blood Flow Metab 2015; 35:985-92. [PMID: 25669912 PMCID: PMC4640263 DOI: 10.1038/jcbfm.2015.9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 12/07/2014] [Accepted: 12/09/2014] [Indexed: 12/21/2022]
Abstract
Atrial fibrillation (AF) increases the risk and severity of thromboembolic stroke. Generally, antithrombotic agents increase the hemorrhagic risk of thromboembolic stroke. However, significant reductions in thromboembolism and intracerebral hemorrhage have been shown with the antithrombin dabigatran compared with warfarin. As thrombin has been implicated in microvessel injury during cerebral ischemia, we hypothesized that dabigatran decreases the risk of intracerebral hemorrhage by direct inhibition of the thrombin-mediated increase in cerebral endothelial cell permeability. Primary murine brain endothelial cells (mBECs) were exposed to murine thrombin before measuring permeability to 4-kDa fluorescein isothiocyanate-dextran. Thrombin increased mBEC permeability in a concentration-dependent manner, without significant endothelial cell death. Pretreatment of mBECs with dabigatran completely abrogated the effect of thrombin on permeability. Neither the expressions of the endothelial cell β1-integrins nor the tight junction protein claudin-5 were affected by thrombin exposure. Oxygen-glucose deprivation (OGD) also increased permeability; this effect was abrogated by treatment with dabigatran, as was the additive effect of thrombin and OGD on permeability. Taken together, these results indicate that dabigatran could contribute to a lower risk of intracerebral hemorrhage during embolism-associated ischemia from AF by protection of the microvessel permeability barrier from local thrombin challenge.
Collapse
Affiliation(s)
- Brian Thomas Hawkins
- Department of Medicine (Hematology), Division of Hematology, Seattle, Washington, USA
| | - Yu-Huan Gu
- Department of Medicine (Hematology), Division of Hematology, Seattle, Washington, USA
| | - Yoshikane Izawa
- Department of Medicine (Hematology), Division of Hematology, Seattle, Washington, USA
| | - Gregory John del Zoppo
- 1] Department of Medicine (Hematology), Division of Hematology, Seattle, Washington, USA [2] Department of Neurology, University of Washington School of Medicine, Seattle, Washington, USA
| |
Collapse
|
46
|
Kang CK, Park CA, Lee DS, Lee YB, Park CW, Kim YB, Cho ZH. Velocity measurement of microvessels using phase-contrast magnetic resonance angiography at 7 Tesla MRI. Magn Reson Med 2015; 75:1640-6. [PMID: 25980462 DOI: 10.1002/mrm.25600] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Revised: 12/10/2014] [Accepted: 12/12/2014] [Indexed: 01/26/2023]
Abstract
PURPOSE The purpose of this study was to measure the velocity and direction of blood flow in microvessels, such as lenticulostriate arteries (LSAs), using PC MRA. METHODS Eleven healthy subjects were scanned with 7 Tesla (T) MRI. Three velocity encoding (VENC) values of 15, 50, and 100 cm/s were tested for detecting the flow velocity in LSAs. The flow directions in Circle of Willis (CoW) were also examined with images obtained by the proposed method. Three subjects were also scanned with 3T MRI to determine the possibility of velocity measurement in LSAs. Difference between 3T and 7T was quantitatively analyzed in terms of signal-to-noise ratio and velocities in vessels and static tissues. RESULTS In 7T MRI, use of VENC = 15 cm/s provided great visualization and velocity measurements in small and slow flowing vessels, such as the LSAs. The mean of peak velocities in LSAs was 9.61 ± 1.78 cm/s. The results obtained with low VENC also clearly depicted the directions of flow in CoW, especially in posterior communicating arteries. However, 3T MRI could not detect the velocity of blood flow in LSAs. CONCLUSION This study demonstrated the potential for measuring the velocity and direction of blood flow in the targeted microvessels using an appropriate VENC and 7T MRI.
Collapse
Affiliation(s)
- Chang-Ki Kang
- Neuroscience Research Institute, Gachon University, Incheon, Korea.,Department of Radiological Science, Gachon University, Incheon, Korea
| | - Chan-A Park
- Bioimaging Research Team, Korea Basic Science Institute, Chungcheongbuk-do, Korea
| | - David Soobin Lee
- Department of Biomedical Engineering and Center for Imaging Science, Johns Hopkins University, Baltimore, Maryland, USA
| | - Yeong-Bae Lee
- Department of Neurology, Gachon University Gil Hospital, Gachon University, Incheon, Korea
| | - Cheol-Wan Park
- Neuroscience Research Institute, Gachon University, Incheon, Korea
| | - Young-Bo Kim
- Neuroscience Research Institute, Gachon University, Incheon, Korea.,Department of Neurosurgery, Gachon University Gil Hospital, Gachon University, Incheon, Korea
| | - Zang-Hee Cho
- Department of Radiological Sciences, University of California, Irvine, California, USA
| |
Collapse
|
47
|
Burke MJC, Nelson L, Slade JY, Oakley AE, Khundakar AA, Kalaria RN. Morphometry of the hippocampal microvasculature in post-stroke and age-related dementias. Neuropathol Appl Neurobiol 2014; 40:284-95. [PMID: 24003901 PMCID: PMC4282329 DOI: 10.1111/nan.12085] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 08/29/2013] [Indexed: 12/31/2022]
Abstract
Background Optimal vascular function is vital for prevention of dementia. We hypothesized that elderly post-stroke survivors who preserve cognitive function show unperturbed cerebral microvasculature compared with those who develop dementia. Methods Using stereological spherical probe software, we compared the length density (Lv, cumulative vessel length per unit tissue volume) of hippocampal microvessels in post mortem brain tissue from post-stroke survivors, Alzheimer's disease (AD), vascular dementia (VaD) and normal ageing control subjects. We also assessed microvessel diameters in the same subjects. Microvessels were identified by markers of endothelial cells (glucose transporter 1; GLUT1), basement membrane (collagen IV; COL4) and smooth muscle cell α-actin (SMA). Results We found increased Lv of both GLUT1 and COL4 immunostained microvessels (P < 0.05) in the hippocampal CA1 region of post-stroke demented (PSD) and AD cases compared with post-stroke nondemented (PSND), control and VaD subjects. However, no changes were apparent in the CA2 region. We also noted significant increase in Lv in the entorhinal cortex of AD compared with PSND and PSD subjects. The mean diameter of microvessels was decreased in PSD, compared with PSND, as well as in AD and VaD compared with controls. Cumulative frequency analysis showed PSND subjects to have significantly greater proportion of microvessels with diameters, ranging from 7 to 12 μm. Conclusions An increase in microvascular Lv in AD and PSD suggests either an increase in angiogenesis or the formation of newer microvessel loops in response to cerebral hypoperfusion. The decreased vessel diameters found in AD and VaD suggests increased vasoconstriction in dementia.
Collapse
Affiliation(s)
- M J C Burke
- Centre for Brain Ageing and Vitality, Institute for Ageing and Health, Newcastle University, Campus for Ageing & Vitality, Newcastle upon Tyne, UK
| | | | | | | | | | | |
Collapse
|
48
|
Hsu YC, Chang YC, Lin YC, Sze CI, Huang CC, Ho CJ. Cerebral microvascular damage occurs early after hypoxia-ischemia via nNOS activation in the neonatal brain. J Cereb Blood Flow Metab 2014; 34:668-76. [PMID: 24398931 PMCID: PMC3982088 DOI: 10.1038/jcbfm.2013.244] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 12/16/2013] [Indexed: 11/09/2022]
Abstract
Microvascular injury early after hypoxic ischemia (HI) may contribute to neonatal brain damage. N-methyl-D-aspartate receptor overstimulation activates neuronal nitric oxide synthases (nNOS). We hypothesized that microvascular damage occurs early post-HI via nNOS activation and contributes to brain injury. Postpartum day-7 rat pups were treated with 7-nitroindazole (7-NI) or aminoguanidine (AG) before or after HI. Electron microscopy was performed to measure neuronal and endothelial cell damage. There were vascular lumen narrowing at 1 hour, pyknotic neurons at 3 hours, and extensive neuronal damage and loss of vessels at 24 hours post HI. Early after reoxygenation, there were neurons with heterochromatic chromatin and endothelial cells with enlarged nuclei occluding the lumen. There was also increased 3-nitrotyrosin in the microvessels and decreased cerebral blood perfusion. 7-NI and AG treatment before hypoxia provided complete and partial neuroprotection, respectively. Early post-reoxygenation, the AG group showed significantly increased microvascular nitrosative stress, microvascular interruptions, swollen nuclei that narrowed the vascular lumen, and decreased cerebral perfusion. The 7-NI group showed significantly decreased microvascular nitrosative stress, patent vascular lumen, and increased cerebral perfusion. Our results indicate that microvascular damage occurs early and progressively post HI. Neuronal nitric oxide synthases activation contributes to microvascular damage and decreased cerebral perfusion early after reoxygenation and worsens brain damage.
Collapse
Affiliation(s)
- Yi-Ching Hsu
- Institute of Basic Medical Sciences, National Cheng Kung University Medical College, Tainan City, Taiwan
| | - Ying-Chao Chang
- Department of Pediatrics, Chang Gung Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung City, Taiwan
| | - Yung-Chieh Lin
- 1] Institute of Clinical Medicine, National Cheng Kung University Medical College, Tainan City, Taiwan [2] Department of Pediatrics, National Cheng Kung University Hospital, Tainan City, Taiwan
| | - Chun-I Sze
- Institute of Cell Biology and Anatomy, National Cheng Kung University Medical College, Tainan City, Taiwan
| | - Chao-Ching Huang
- 1] Department of Pediatrics, National Cheng Kung University Hospital, Tainan City, Taiwan [2] Department of Pediatrics, Taipei Medical University, College of Medicine, Taipei, Taiwan
| | - Chien-Jung Ho
- Department of Pediatrics, National Cheng Kung University Hospital, Tainan City, Taiwan
| |
Collapse
|
49
|
Abstract
Stroke usually affects people with underlying medical conditions. In particular, diabetics are significantly more likely to have a stroke and the prognosis for recovery is poor. Because diabetes is associated with degenerative changes in the vasculature of many organs, we sought to determine how hyperglycemia affects blood flow dynamics after an ischemic stroke. Longitudinal in vivo two-photon imaging was used to track microvessels before and after photothrombotic stroke in a diabetic mouse model. Chronic hyperglycemia exacerbated acute (3-7 d) ischemia-induced increases in blood flow velocity, vessel lumen diameter, and red blood cell flux in peri-infarct regions. These changes in blood flow dynamics were most evident in superficial blood vessels within 500 μm from the infarct, rather than deeper or more distant cortical regions. Long-term imaging of diabetic mice not subjected to stroke indicated that these acute stroke-related changes in vascular function could not be attributed to complications from hyperglycemia alone. Treating diabetic mice with insulin immediately after stroke resulted in less severe alterations in blood flow within the first 7 d of recovery, but had more variable results at later time points. Analysis of microvessel branching patterns revealed that stroke led to a pruning of microvessels in peri-infarct cortex, with very few instances of sprouting. These results indicate that chronic hyperglycemia significantly affects the vascular response to ischemic stroke and that insulin only partially mitigates these changes. The combination of these acute and chronic alterations in blood flow dynamics could underlie diabetes-related deficits in cortical plasticity and stroke recovery.
Collapse
|
50
|
Yin R, Lu C, Chen Q, Fan J, Lu J. Microvascular damage is involved in the pathogenesis of heroin induced spongiform leukoencephalopathy. Int J Med Sci 2013; 10:299-306. [PMID: 23423584 PMCID: PMC3575625 DOI: 10.7150/ijms.4830] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 01/16/2013] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVE To investigate whether microvascular damage is involved in the pathogenesis of heroin induced spongiform leukoencephalopathy (HSLE). METHODS The brain tissues were collected from 4 HSLE patients and 5 controls and then fixed in 4% paraformaldehyde. The frontal lobe, corpus callosum and cerebellum were separated. The expressions of myelin base protein (MBP) and CD34 were detected by immunohistochemistry. TUNEL staining was applied to detect cell apoptosis. The correlation between microvascular changes and pathological vacuoles was evaluated. RESULTS No obvious abnormalities were found in the brain of controls. Immunohistochemistry for MBP showed the collapse and fracture of myelin sheath and vacuole formation in the subcortical white matter, corpus callosum, and cerebellar white matter of HSLE patients. TUNEL staining showed the number of apoptotic cells in the cerebellar white matter and corpus callosum of HSLE patients was significantly higher than that in controls (F = 389.451, P < 0.001). Masson's trichrome staining revealed vacuolar degeneration in the cerebral white matter of HSLE patients, and the vacuoles were distributed around the microvessels. Immunohistochemistry revealed CD34 positive cells were seldom found besides the vessels in the cerebellar white matter and corpus callosum of HSLE patients, but a variety of CD34 positive cells was found in the vascular wall of controls (F = 838.500, P < 0.001). CONCLUSION Apoptosis of oligodendrocytes may be related to the HSLE. Cerebral vascular injury and microcirculation dysfunction are involved in the pathogenesis of HSLE. The interrelation between apoptosis of oligodendrocytes and the microvascular damage are required to be studied in future investigations.
Collapse
Affiliation(s)
- Ruixue Yin
- Department of Rehabilitation Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | | | | | | | | |
Collapse
|