1
|
Hossain MMN, Hu NW, Abdelhamid M, Singh S, Murfee WL, Balogh P. Angiogenic Microvascular Wall Shear Stress Patterns Revealed Through Three-dimensional Red Blood Cell Resolved Modeling. FUNCTION 2023; 4:zqad046. [PMID: 37753184 PMCID: PMC10519277 DOI: 10.1093/function/zqad046] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 09/28/2023] Open
Abstract
The wall shear stress (WSS) exerted by blood flowing through microvascular capillaries is an established driver of new blood vessel growth, or angiogenesis. Such adaptations are central to many physiological processes in both health and disease, yet three-dimensional (3D) WSS characteristics in real angiogenic microvascular networks are largely unknown. This marks a major knowledge gap because angiogenesis, naturally, is a 3D process. To advance current understanding, we model 3D red blood cells (RBCs) flowing through rat angiogenic microvascular networks using state-of-the-art simulation. The high-resolution fluid dynamics reveal 3D WSS patterns occurring at sub-endothelial cell (EC) scales that derive from distinct angiogenic morphologies, including microvascular loops and vessel tortuosity. We identify the existence of WSS hot and cold spots caused by angiogenic surface shapes and RBCs, and notably enhancement of low WSS regions by RBCs. Spatiotemporal characteristics further reveal how fluctuations follow timescales of RBC "footprints." Altogether, this work provides a new conceptual framework for understanding how shear stress might regulate EC dynamics in vivo.
Collapse
Affiliation(s)
- Mir Md Nasim Hossain
- Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07114, USA
| | - Nien-Wen Hu
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Maram Abdelhamid
- Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07114, USA
| | - Simerpreet Singh
- Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07114, USA
| | - Walter L Murfee
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Peter Balogh
- Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07114, USA
| |
Collapse
|
2
|
Rowe G, Heng DS, Beare JE, Hodges NA, Tracy EP, Murfee WL, LeBlanc AJ. Stromal Vascular Fraction Reverses the Age-Related Impairment in Revascularization following Injury. J Vasc Res 2022; 59:343-357. [PMID: 36075199 PMCID: PMC9780192 DOI: 10.1159/000526002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 07/06/2022] [Indexed: 12/31/2022] Open
Abstract
Adipose-derived stromal vascular fraction (SVF) has emerged as a potential regenerative therapy, but few studies utilize SVF in a setting of advanced age. Additionally, the specific cell population in SVF providing therapeutic benefit is unknown. We hypothesized that aging would alter the composition of cell populations present in SVF and its ability to promote angiogenesis following injury, a mechanism that is T cell-mediated. SVF isolated from young and old Fischer 344 rats was examined with flow cytometry for cell composition. Mesenteric windows from old rats were isolated following exteriorization-induced (EI) hypoxic injury and intravenous injection of one of four cell therapies: (1) SVF from young or (2) old donors, (3) SVF from old donors depleted of or (4) enriched for T cells. Advancing age increased the SVF T-cell population but reduced revascularization following injury. Both young and aged SVF incorporated throughout the host mesenteric microvessels, but only young SVF significantly increased vascular area following EI. This study highlights the effect of donor age on SVF angiogenic efficacy and demonstrates how the ex vivo mesenteric-window model can be used in conjunction with SVF therapy to investigate its contribution to angiogenesis.
Collapse
Affiliation(s)
- Gabrielle Rowe
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA,
- Department of Physiology, University of Louisville, Louisville, Kentucky, USA,
| | - David S Heng
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
| | - Jason E Beare
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
| | - Nicholas A Hodges
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, USA
| | - Evan P Tracy
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
- Department of Physiology, University of Louisville, Louisville, Kentucky, USA
| | - Walter L Murfee
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, USA
| | - Amanda J LeBlanc
- Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky, USA
- Department of Cardiovascular and Thoracic Surgery, University of Louisville, Louisville, Kentucky, USA
| |
Collapse
|
3
|
Cho AR, Lee HJ, Kim HJ, Do W, Jeon S, Baek SH, Kim ES, Kwon JY, Kim HK. Microvascular Reactivity Measured by Dynamic Near-infrared Spectroscopy Following Induction of General Anesthesia in Healthy Patients: Observation of Age-related Change. Int J Med Sci 2021; 18:1096-1103. [PMID: 33526968 PMCID: PMC7847632 DOI: 10.7150/ijms.52433] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 12/18/2020] [Indexed: 01/31/2023] Open
Abstract
Background: The purpose of this study was to investigate the effect of general anesthesia on microvascular reactivity and tissue oxygen saturation (StO2) using near-infrared spectroscopy in conjunction with vascular occlusion tests (VOT). Age-related changes of microvascular reactivity, that is, the capacity of capillary recruitment, were examined. Methods: This prospective observational study was performed on 60 patients without comorbidities who underwent elective surgery under general anesthesia. Baseline StO2 on thenar eminence, hemodynamics, and laboratory profile were monitored before (T0) and 30 min after general anesthesia (T1). During VOT, occlusion slope representing oxygen consumption of muscle and recovery slope representing microvascular reactivity were also collected at T0 and T1. Results: Baseline StO2 and minimum / maximum StO2 during VOT increased under general anesthesia. Occlusion slope decreased while the recovery slope increased under general anesthesia. To observe aging effect, Receiver operating characteristic analysis was performed and age less than 65 years old showed a fair performance in predicting the increase of microvascular reactivity after the induction of anesthesia (AUC 0.733, 95% CI 0.594-0.845, P= 0.003). For age-related analyses, 27 patients of younger group (< 65 years) and 26 patients of older group (≥ 65 years) were divided. Recovery slope significantly increased under general anesthesia in younger group (2.44 [1.91-2.81] % ∙ sec-1 at T0 and 3.59 [2.58-3.51] % ∙ sec-1 at T1, P <0.001), but not in older group (2.61 [2.21-3.20] % ∙ sec-1 at T0, 2.63 [1.90-3.60] % ∙ sec-1 at T1, P = 0.949). Conclusions: General anesthesia could improve StO2 through increase of microvascular reactivity and decrease of tissue metabolism. However, microvascular reactivity to capillary recruitment under general anesthesia significantly improves in younger patients, not in older patients.
Collapse
Affiliation(s)
- Ah-Reum Cho
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.,Department of Anesthesia and Pain Medicine, Pusan National University, School of Medicine, Yangsan, Republic of Korea
| | - Hyeon-Jeong Lee
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.,Department of Anesthesia and Pain Medicine, Pusan National University, School of Medicine, Yangsan, Republic of Korea
| | - Hyae-Jin Kim
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Wangseok Do
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Soeun Jeon
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Seung-Hoon Baek
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.,Department of Anesthesia and Pain Medicine, Pusan National University, School of Medicine, Yangsan, Republic of Korea
| | - Eun-Soo Kim
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.,Department of Anesthesia and Pain Medicine, Pusan National University, School of Medicine, Yangsan, Republic of Korea
| | - Jae-Young Kwon
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.,Department of Anesthesia and Pain Medicine, Pusan National University, School of Medicine, Yangsan, Republic of Korea
| | - Hae-Kyu Kim
- Department of Anesthesia and Pain Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.,Department of Anesthesia and Pain Medicine, Pusan National University, School of Medicine, Yangsan, Republic of Korea
| |
Collapse
|
4
|
Nutrient Sensing and Redox Balance: GCN2 as a New Integrator in Aging. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5730532. [PMID: 31249645 PMCID: PMC6556294 DOI: 10.1155/2019/5730532] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 04/21/2019] [Indexed: 02/05/2023]
Abstract
Aging is a complex process in which the accumulation of molecular, cellular, and organism dysfunction increases the probability of death. Several pieces of evidence have revealed a contribution of stress responses in aging and in aging-related diseases, in particular, the key role of signaling pathways associated to nutritional stress. Here, we review the possible interplay between amino acid sensing and redox balance maintenance mediated by the nutritional sensor general control nonderepressive 2 (GCN2). We discuss this new dimension of nutritional stress sensing consequences, standing out GCN2 as a central coordinator of key cellular processes that assure healthy homeostasis in the cell, raising GCN2 as a novel interesting target, that when activated, could imply pleiotropic benefits, particularly GCN2 intervention and its new unexplored therapeutic role as a player in the aging process.
Collapse
|
5
|
Rodriguez D, Nourizadeh S, De Tomaso AW. The biology of the extracorporeal vasculature of Botryllus schlosseri. Dev Biol 2019; 448:309-319. [PMID: 30760410 DOI: 10.1016/j.ydbio.2018.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 09/29/2018] [Accepted: 10/17/2018] [Indexed: 02/08/2023]
Abstract
The extracorporeal vasculature of the colonial ascidian Botryllus schlosseri plays a key role in several biological processes: transporting blood, angiogenesis, regeneration, self-nonself recognition, and parabiosis. The vasculature also interconnects all individuals in a colony and is composed of a single layer of ectodermally-derived cells. These cells form a tube with the basal lamina facing the lumen, and the apical side facing an extracellular matrix that consists of cellulose and other proteins, known as the tunic. Vascular tissue is transparent and can cover several square centimeters, which is much larger than any single individual within the colony. It forms a network that ramifies and expands to the perimeter of each colony and terminates into oval-shaped protrusions known as ampullae. Botryllus individuals replace themselves through a weekly budding cycle, and vasculature is added to ensure the interconnection of each new individual, thus there is continuous angiogenesis occurring naturally. The vascular tissue itself is highly regenerative; surgical removal of the ampullae and peripheral vasculature triggers regrowth within 24-48 h, which includes forming new ampullae. When two individuals, whether in the wild or in the lab, come into close contact and their ampullae touch, they can either undergo parabiosis through anastomosing vessels, or reject vascular fusion. The vasculature is easily manipulated by direct means such as microinjections, microsurgeries, and pharmacological reagents. Its transparent nature allows for in vivo analysis by bright field and fluorescence microscopy. Here we review the techniques and approaches developed to study the different biological processes that involve the extracorporeal vasculature.
Collapse
Affiliation(s)
- Delany Rodriguez
- Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA 93106, USA.
| | - Shane Nourizadeh
- Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| | - Anthony W De Tomaso
- Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| |
Collapse
|
6
|
Wierich MC, Schipke J, Brandenberger C, Abdellatif M, Eisenberg T, Madeo F, Sedej S, Mühlfeld C. Cardioprotection by spermidine does not depend on structural characteristics of the myocardial microcirculation in aged mice. Exp Gerontol 2019; 119:82-88. [PMID: 30703435 DOI: 10.1016/j.exger.2019.01.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/21/2019] [Accepted: 01/25/2019] [Indexed: 11/17/2022]
Abstract
AIMS Ageing is associated with cardiovascular disease and reduced cardiac function. This cardiac functional decline is accompanied by cardiac remodeling and alterations in cardiomyocyte composition. Recently, it was shown that the natural polyamine spermidine preserves cardiac function and cardiomyocyte composition in old mice. As cardiac function critically relies on blood supply, we tested whether spermidine has also beneficial effects on ageing-associated changes of the myocardial microcirculation. METHODS Using transmission electron microscopy, the left ventricular capillaries of young (4-months old) and aged (24-months old) C57BL/6J male mice were investigated by stereology. Aged mice were subdivided into an untreated group and a group that was fed spermidine late in life for 6 months. Specifically, total volume, surface area and length of capillaries as well as endothelial thickness were estimated. Additionally, the total length of precapillary arterioles was assessed. The protein level of VEGF-A was measured using Western blot. RESULTS Ageing was associated with whole heart and left ventricular hypertrophy. All total capillary-related values (including volume, surface area and length) were significantly higher in 24-month-old mice compared with 4-month-old mice. Moreover, VEGF-A expression was significantly enhanced in aged mice. The mean thickness of the endothelium was not different, but the mean area of myocardium supplied by capillaries was smaller in old mice. Spermidine treatment had no significant effect on the ageing-associated structural changes or VEGF-A expression. CONCLUSIONS In conclusion, in the left ventricles of aged mice the growth of capillaries and arterioles supplying cardiomyocytes were in proportion to whole organ hypertrophy. Spermidine had no effect on quantitative characteristics of capillaries or arterioles, suggesting that the beneficial effects of spermidine on the ageing heart do not depend on the quantitative structural characteristics of the microcirculation which does not exclude potential functional differences between the groups.
Collapse
Affiliation(s)
- Marie-Christin Wierich
- Institute of Functional and Applied Anatomy, Hannover Medical School, 30625 Hannover, Germany
| | - Julia Schipke
- Institute of Functional and Applied Anatomy, Hannover Medical School, 30625 Hannover, Germany; Cluster of Excellence REBIRTH (From Regenerative Biology to Reconstructive Therapy), Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
| | - Christina Brandenberger
- Institute of Functional and Applied Anatomy, Hannover Medical School, 30625 Hannover, Germany; Cluster of Excellence REBIRTH (From Regenerative Biology to Reconstructive Therapy), Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
| | | | - Tobias Eisenberg
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria; BioTechMed, Graz, Austria
| | - Simon Sedej
- Department of Cardiology, Medical University of Graz, Graz, Austria; BioTechMed, Graz, Austria
| | - Christian Mühlfeld
- Institute of Functional and Applied Anatomy, Hannover Medical School, 30625 Hannover, Germany; Cluster of Excellence REBIRTH (From Regenerative Biology to Reconstructive Therapy), Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany.
| |
Collapse
|
7
|
Suarez-Martinez AD, Peirce SM, Isakson BE, Nice M, Wang J, Lounsbury KM, Scallan JP, Murfee WL. Induction of microvascular network growth in the mouse mesentery. Microcirculation 2018; 25:e12502. [PMID: 30178505 DOI: 10.1111/micc.12502] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 08/24/2018] [Accepted: 08/30/2018] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Motivated by observations of mesenteries harvested from mice treated with tamoxifen dissolved in oil for inducible gene mutation studies, the objective of this study was to demonstrate that microvascular growth can be induced in the avascular mouse mesentery tissue. METHODS C57BL/6 mice were administered an IP injection for five consecutive days of: saline, sunflower oil, tamoxifen dissolved in sunflower oil, corn oil, or peanut oil. RESULTS Twenty-one days post-injection, zero tissues from saline group contained branching microvascular networks. In contrast, all tissues from the three oils and tamoxifen groups contained vascular networks with arterioles, venules, and capillaries. Smooth muscle cells and pericytes were present in their expected locations and wrapping morphologies. Significant increases in vascularized tissue area and vascular density were observed when compared to saline group, but sunflower oil and tamoxifen group were not significantly different. Vascularized tissues also contained LYVE-1-positive and Prox1-positive lymphatic networks, indicating that lymphangiogenesis was stimulated. When comparing the different oils, vascularized tissue area and vascular density of sunflower oil were significantly higher than corn and peanut oils. CONCLUSIONS These results provide novel evidence supporting that induction of microvascular network growth into the normally avascular mouse mesentery is possible.
Collapse
Affiliation(s)
- Ariana D Suarez-Martinez
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana.,Department of Biomedical Engineering, University of Florida, Gainesville, Florida
| | - Shayn M Peirce
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia
| | - Brant E Isakson
- Department of Molecular Physiology & Biological Physics, University of Virginia, Charlottesville, Virginia
| | - Matthew Nice
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana
| | - Jack Wang
- Department of Biomedical Engineering, University of Florida, Gainesville, Florida
| | - Karen M Lounsbury
- Department of Pharmacology, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Joshua P Scallan
- Department of Molecular Pharmacology & Physiology, University of South Florida, Tampa, Florida
| | - Walter L Murfee
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana.,Department of Biomedical Engineering, University of Florida, Gainesville, Florida
| |
Collapse
|
8
|
Lindsey ML, Gray GA, Wood SK, Curran-Everett D. Statistical considerations in reporting cardiovascular research. Am J Physiol Heart Circ Physiol 2018; 315:H303-H313. [PMID: 30028200 PMCID: PMC6139626 DOI: 10.1152/ajpheart.00309.2018] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The problem of inadequate statistical reporting is long standing and widespread in the biomedical literature, including in cardiovascular physiology. Although guidelines for reporting statistics have been available in clinical medicine for some time, there are currently no guidelines specific to cardiovascular physiology. To assess the need for guidelines, we determined the type and frequency of statistical tests and procedures currently used in the American Journal of Physiology-Heart and Circulatory Physiology. A PubMed search for articles published in the American Journal of Physiology-Heart and Circulatory Physiology between January 1, 2017, and October 6, 2017, provided a final sample of 146 articles evaluated for methods used and 38 articles for indepth analysis. The t-test and ANOVA accounted for 71% (212 of 300 articles) of the statistical tests performed. Of six categories of post hoc tests, Bonferroni and Tukey tests were used in 63% (62 of 98 articles). There was an overall lack in details provided by authors publishing in the American Journal of Physiology-Heart and Circulatory Physiology, and we compiled a list of recommended minimum reporting guidelines to aid authors in preparing manuscripts. Following these guidelines could substantially improve the quality of statistical reports and enhance data rigor and reproducibility.
Collapse
Affiliation(s)
- Merry L Lindsey
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi.,Research Service, G. V. (Sonny) Montgomery Veterans Affairs Medical Center , Jackson, Mississippi
| | - Gillian A Gray
- British Heart Foundation/University Centre for Cardiovascular Science, Edinburgh Medical School, University of Edinburgh , Edinburgh , United Kingdom
| | - Susan K Wood
- Department of Pharmacology, Physiology and Neuroscience, University of South Carolina School of Medicine , Columbia, South Carolina
| | - Douglas Curran-Everett
- Division of Biostatistics and Bioinformatics, National Jewish Health , Denver, Colorado.,Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Denver , Denver, Colorado
| |
Collapse
|
9
|
Suarez-Martinez AD, Bierschenk S, Huang K, Kaplan D, Bayer CL, Meadows SM, Sperandio M, Murfee WL. A Novel ex vivo Mouse Mesometrium Culture Model for Investigating Angiogenesis in Microvascular Networks. J Vasc Res 2018; 55:125-135. [PMID: 29779031 DOI: 10.1159/000489102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 02/16/2018] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The development of models that incorporate intact microvascular networks enables the investigation of multicellular dynamics during angiogenesis. Our laboratory introduced the rat mesentery culture model as such a tool, which would be enhanced with mouse tissue. Since mouse mesentery is avascular, an alternative is mouse mesometrium, the connective tissue of uterine horns. The study's objective was to demonstrate that mouse mesometrium contains microvascular networks that can be cultured to investigate multicellular dynamics during angiogenesis. METHODS Harvested mesometrium tissues from C57Bl/6 female mice were cultured in media with serum for up to 7 days. PECAM, NG2, αSMA, and LYVE-1 labeling identified endothelial cells, pericytes, smooth muscle cells, and lymphatic endothelial cells, respectively. RESULTS These cells comprised microvascular networks with arterioles, venules, and capillaries. Compared to day 0, capillary sprouts per vascular length were increased by 3 and 5 days in culture (day 0, 0.08 ± 0.01; day 3, 3.19 ± 0.78; day 5, 2.49 ± 0.05 sprouts/mm; p < 0.05). Time-lapse imaging of cultured tissues from FlkEGFP mice showcases the use of the model for lineage studies. The impact is supported by the identification of endothelial cell jumping from one sprout to another. CONCLUSION These results introduce a novel culture model for investigating multicellular dynamics during angiogenesis in real-time ex vivo microvascular networks.
Collapse
Affiliation(s)
- Ariana D Suarez-Martinez
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, USA.,Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Susanne Bierschenk
- Walter-Brendel-Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität, Munich, Germany
| | - Katie Huang
- Department of Cell and Molecular Biology, Tulane University, New Orleans, Louisiana, USA
| | - Dana Kaplan
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Carolyn L Bayer
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Stryder M Meadows
- Department of Cell and Molecular Biology, Tulane University, New Orleans, Louisiana, USA
| | - Markus Sperandio
- Walter-Brendel-Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität, Munich, Germany
| | - Walter L Murfee
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, USA.,Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| |
Collapse
|
10
|
Hodges NA, Suarez-Martinez AD, Murfee WL. Understanding angiogenesis during aging: opportunities for discoveries and new models. J Appl Physiol (1985) 2018; 125:1843-1850. [PMID: 29648521 DOI: 10.1152/japplphysiol.00112.2018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Microvascular network growth and remodeling are common denominators for most age-related pathologies. For multiple pathologies (myocardial infarction, stroke, hypertension), promoting microvascular growth, termed angiogenesis, would be beneficial. For others (cancer, retinopathies, rheumatoid arthritis), blocking angiogenesis would be desirable. Most therapeutic strategies, however, are motivated based on studies using adult animal models. This approach is problematic and does not account for the impaired angiogenesis or the inherent network structure changes that might result from age. Considering the common conception that angiogenesis is impaired with age, a need exists to identify the causes and mechanisms of angiogenesis in aged scenarios and for new tools to enable comparison of aged versus adult responses to therapy. The objective of this article is to introduce opportunities for advancing our understanding of angiogenesis in aging through the discovery of novel cell changes along aged microvascular networks and the development of novel ex vivo models.
Collapse
Affiliation(s)
- Nicholas A Hodges
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana.,Departmental of Biomedical Engineering, University of Florida , Gainesville, Florida
| | | | - Walter L Murfee
- Departmental of Biomedical Engineering, University of Florida , Gainesville, Florida
| |
Collapse
|
11
|
Brooks HL, Lindsey ML. Guidelines for authors and reviewers on antibody use in physiology studies. Am J Physiol Heart Circ Physiol 2018; 314:H724-H732. [PMID: 29351459 PMCID: PMC6048465 DOI: 10.1152/ajpheart.00512.2017] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Antibody use is a critical component of cardiovascular physiology research, and antibodies are used to monitor protein abundance (immunoblot analysis) and protein expression and localization (in tissue by immunohistochemistry and in cells by immunocytochemistry). With ongoing discussions on how to improve reproducibility and rigor, the goal of this review is to provide best practice guidelines regarding how to optimize antibody use for increased rigor and reproducibility in both immunoblot analysis and immunohistochemistry approaches. Listen to this article’s corresponding podcast at http://ajpheart.podbean.com/e/guidelines-on-antibody-use-in-physiology-studies/.
Collapse
Affiliation(s)
- Heddwen L Brooks
- Department of Physiology, Pharmacology and Medicine, Sarver Heart Center, College of Medicine, University of Arizona , Tucson, Arizona
| | - Merry L Lindsey
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center , Jackson, Mississippi.,Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center , Jackson, Mississippi
| |
Collapse
|
12
|
Marinesco S, Ungvari Z, Galvan V. Age-related impairment of metabovascular coupling during cortical spreading depolarizations. Am J Physiol Heart Circ Physiol 2017; 313:H1209-H1212. [PMID: 28842440 PMCID: PMC5814652 DOI: 10.1152/ajpheart.00514.2017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 08/18/2017] [Indexed: 11/22/2022]
Affiliation(s)
- Stephane Marinesco
- Lyon Neuroscience Research Center, Team TIGER and AniRA-Neurochem Technological Platform, INSERM U1028, CNRS UMR5292, University Claude Bernard Lyon I, Lyon, France
| | - Zoltan Ungvari
- Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center , Oklahoma City, Oklahoma
| | - Veronica Galvan
- Barshop Institute for Longevity and Aging Studies and Department of Cellular and Integrative Physiology, University of Texas Health San Antonio , San Antonio, Texas
- South Texas Veterans Health Care System and Geriatric Research Education and Clinical Center, United States Department of Veterans Affairs , San Antonio, Texas
| |
Collapse
|