scholarly journals Nondestructive Monitoring of Degradable Scaffold-Based Tissue-Engineered Blood Vessel Development Using Optical Coherence Tomography

10.3791/58040 ◽  
2018 ◽  
Author(s):  
Wanwen Chen ◽  
Shangmin Liu ◽  
Junqing Yang ◽  
Yueheng Wu ◽  
Wentao Ma ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Blood Vessel ◽  
Nondestructive Monitoring ◽  
Optical Coherence ◽  
Blood Vessel Development ◽  
Vessel Development

Blood Vessel Density Measured Using Dynamic Optical Coherence Tomography is a Tool for Wound Healers

2021 ◽  
pp. 153473462110173
Author(s):  
Rajgopal Mani ◽  
Jon Holmes ◽  
Kittipan Rerkasem ◽  
Nikolaos Papanas
Keyword(s):  
Blood Flow ◽  
Optical Coherence Tomography ◽  
Blood Vessel ◽  
Chronic Wounds ◽  
Vessel Density ◽  
Optical Coherence ◽  
Skin Microcirculation ◽  
Wound Edge ◽  
Venous Ulcers ◽  
Oct Imaging

Dynamic optical coherence tomography (D-OCT) is a relatively new technique that may be used to study the substructures in the retina, in the skin and its microcirculation. Furthermore, D-OCT is a validated method of imaging blood flow in skin microcirculation. The skin around venous and mixed arterio-venous ulcers was imaged and found to have tortuous vessels assumed to be angiogenic sprouts, and classified as dots, blobs, coils, clumps, lines, and curves. When these images were analyzed and measurements of vessel density were made, it was observed that the prevalence of coils and clumps in wound borders was significantly greater compared with those at wound centers. This reinforced the belief of inward growth of vessels from wound edge toward wound center which, in turn, reposed confidence in following the wound edge to study healing. D-OCT imaging permits the structure and the function of the microcirculation to be imaged, and vessel density measured. This offers a new vista of skin microcirculation and using it, to better understand angiogenesis in chronic wounds.

scholarly journals Rab35 Governs Apicobasal Polarity Through Regulation of Actin Dynamics During Sprouting Angiogenesis

2022 ◽  
Author(s):  
Caitlin R Francis ◽  
Hayle Kincross ◽  
Erich J Kushner
Keyword(s):  
Blood Vessel ◽  
Actin Polymerization ◽  
Tissue Type ◽  
Potential Contribution ◽  
Rab Gtpases ◽  
Sprouting Angiogenesis ◽  
Apicobasal Polarity ◽  
Blood Vessel Development ◽  
Vessel Development ◽  
Sprout Formation

In early blood vessel development, trafficking programs, such as those using Rab GTPases, are tasked with delivering vesicular cargo with high spatiotemporal accuracy. However, the function of many Rab trafficking proteins remain ill-defined in endothelial tissue; therefore, their relevance to blood vessel development is unknown. Rab35 has been shown to play an enigmatic role in cellular behaviors which differs greatly between tissue-type and organism. Importantly, Rab35 has never been characterized for its potential contribution in sprouting angiogenesis; thus, our goal was to map Rab35s primary function in angiogenesis. Our results demonstrate that Rab35 is critical for sprout formation; in its absence apicobasal polarity is entirely lost in vitro and in vivo. To determine mechanism, we systematically explored established Rab35 effectors and show that none are operative in endothelial cells. However, we find that Rab35 partners with DENNd1c, an evolutionarily divergent guanine exchange factor, to localize to actin. Here, Rab35 regulates actin polymerization, which is required to setup proper apicobasal polarity during sprout formation. Our findings establish that Rab35 is a potent regulator of actin architecture during blood vessel development.

scholarly journals Defective blood vessel development and pericyte/pvSMC distribution in α4 integrin-deficient mouse embryos

2006 ◽  
Vol 293 (1) ◽  
pp. 165-177 ◽  
Author(s):  
Alison Grazioli ◽  
Christina S. Alves ◽  
Konstantinos Konstantopoulos ◽  
Joy T. Yang
Keyword(s):  
Blood Vessel ◽  
Mouse Embryos ◽  
Deficient Mouse ◽  
Blood Vessel Development ◽  
Vessel Development
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