! The neurovasculature supplies nutrients to the 100 billion neurons in the adult human brain via a 600 km network of capillaries and microvessels. As the interface between the brain and the vascular system, the blood-brain barrier, which includes the neurovasculature, is responsible for regulating the brain microenvironment by preventing fluctuations in chemistry, transport of immune cells, and the entry of toxins and pathogens. At the same time, almost all diseases of the brain are associated with disruption or dysfunction of the neurovasculature, which leads to entry of blood components, immune cells, and pathogens into the brain, and ultimately causes neuroinflammation, oxidative stress, and neurotoxicity. Functional human models have the potential to address many unresolved questions associated with the role of the neurovasculature in health and disease, and in developing more complex models of the human nervous system that will ultimately contribute towards the realization of integrated multicellular systems. There are two major challenges to developing physiologically-relevant, tissue-engineered models of the human neurovasculature: (1) a source of relevant cells, and (2) 3D cell culture methods to build the model. Stem cell technology provides a solution to providing a reliable source of human, brain-specific cells, a long-standing barrier to developing blood-brain barrier models. Similarly, advances in tissue engineering provide the tools for self-organization of perfusable vascular networks. Solving these problems will have significant impact on neuroscience research, elucidating mechanisms of central nervous system diseases, and in the development and translation of new therapies and technologies.
In Aim 1 we will characterize the phenotype and barrier function of brain microvessels under quiescent conditions and in response to activation/stress.
In Aim 2 we will develop and characterize brain-specific capillary networks.
In Aim 3 we will integrate pericytes and astrocytes into our models. These models will enable a broad range of applications, including fundamental studies of neurogenesis, vascularization, and development, and mechanistic studies of disease progression, treatment, repair, drug and gene delivery, and toxicity.

Public Health Relevance

The brain microvasculature supplies nutrients to the brain and regulates the brain microenvironment by preventing fluctuations in chemistry and the entry of immune cells, toxins, and pathogens. The goal of this project is to develop functional models of the microvasculature in the healthy human brain. These models will enable a broad range of applications, including mechanistic studies of disease progression, treatment, repair, drug and gene delivery, and toxicity.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS106008-03
Application #
10075331
Study Section
Bioengineering of Neuroscience, Vision and Low Vision Technologies Study Section (BNVT)
Program Officer
Lavaute, Timothy M
Project Start
2019-04-01
Project End
2023-12-31
Budget Start
2021-01-01
Budget End
2021-12-31
Support Year
3
Fiscal Year
2021
Total Cost
Indirect Cost
Name
Johns Hopkins University
Department
Engineering (All Types)
Type
Biomed Engr/Col Engr/Engr Sta
DUNS #
001910777
City
Baltimore
State
MD
Country
United States
Zip Code
21218