? Overview Modeling of infectious diseases that affect the human central nervous system (CNS), such as those associated with Zika virus (ZIKV) and West Nile virus (WNV), has been challenging due to the inaccessibility of the relevant cell types. Reprogramming human somatic cells, such as skin fibroblasts, into induced pluripotent stem cells (iPSCs) provides a genetically tractable and renewable source of human neural cell populations. We can differentiate these iPSCs into many of the cell types critical for the study of neurotropic viruses, but typically this is performed in monolayer cultures to allow for more control and to generate more homogeneous cell populations, but this methodology lacks the self-organizing properties and interactive dynamics among different cell populations observed during organ development. Recently, more complex structures resembling whole developing organs, named organoids, have been generated from human iPSCs via 3D culturing methods. This emerging new technology has the potential to significantly advance our understanding of infectious diseases and for future therapeutic development. The success of this approach, however, critically depends on how well organoids mimic biological structures, recapitulate human physiology and disease pathology, and incorporate components critical to disease and human host responses. We propose to develop a robust platform for organoid development to model brain development that can be adopted by single labs for basic research, and is amenable to translational studies and drug development and testing. Our Research Center is comprised of three Research Projects, a Scientific Core, and an Administrative Core led by experts in virology, stem cell biology, neural development, and bioengineering. We will focus on ZIKV and WNV, two neurotropic flaviviruses, to develop our organoid platform, which can then be used by the scientific community to investigate other infectious diseases that affect the nervous system. Importantly, ZIKV and WNV are thought to impact the CNS at different stages of development, with ZIKV having been recently implicated as being causal for microcephaly in some pregnant women. This affords us the opportunity to develop an organoid platform with proof-of-principle testing with viruses suspected to have cell type- and stage-specific tropism. Project 1 will focus on technology development to generate more mature organoids and the scaling up of robust assays to perform medium-throughput compound testing. Project 2 will focus on ZIKV infections in early stage organoids and Project 3 will evaluate co-culture organoid systems to model WNV infections in later stage organoids. The projects will be supported by a Scientific Core that will provide cells and on-site training to Projects 2 & 3, as well as optimization of differentiation protocols and bioinformatics analyses. Finally, the Administrative Core will provide logistical support to facilitate collaborations among investigators and to coordinate the timely release of results and resources to the scientific community.

Public Health Relevance

- Overview Harnessing the power of human induced pluripotent stem cells to differentiate and self-organize into 3D brain- like structures could lead a new translational platform for infectious disease modeling. This Center is designed to standardize protocols for low-cost and efficient generation of highly consistent cerebral organoids that capture key features of human brain development. Zika virus and West Nile virus, two neurotropic flaviviruses, will be the focus of the current research program to illustrate the utility of this platform for biological discovery and testing of therapeutic compounds.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Program--Cooperative Agreements (U19)
Project #
1U19AI131130-01
Application #
9312466
Study Section
Special Emphasis Panel (ZAI1-BLG-M (J2))
Program Officer
Challberg, Mark D
Project Start
2017-04-01
Project End
2022-03-31
Budget Start
2017-04-01
Budget End
2018-03-31
Support Year
1
Fiscal Year
2017
Total Cost
$1,624,758
Indirect Cost
$304,703
Name
University of Pennsylvania
Department
Neurosciences
Type
Schools of Medicine
DUNS #
042250712
City
Philadelphia
State
PA
Country
United States
Zip Code
19104
Christian, Kimberly M; Song, Hongjun; Ming, Guo-Li (2018) A previously undetected pathology of Zika virus infection. Nat Med 24:258-259
Ho, Cheng-Ying; Castillo, Nicolas; Encinales, Liliana et al. (2018) Second-trimester Ultrasound and Neuropathologic Findings in Congenital Zika Virus Infection. Pediatr Infect Dis J 37:1290-1293
Yang, Shu; Xu, Miao; Lee, Emily M et al. (2018) Emetine inhibits Zika and Ebola virus infections through two molecular mechanisms: inhibiting viral replication and decreasing viral entry. Cell Discov 4:31
Lang, Jianshe; Cheng, Yichen; Rolfe, Alyssa et al. (2018) An hPSC-Derived Tissue-Resident Macrophage Model Reveals Differential Responses of Macrophages to ZIKV and DENV Infection. Stem Cell Reports 11:348-362
Song, Guang; Rho, Hee-Sool; Pan, Jianbo et al. (2018) Multiplexed Biomarker Panels Discriminate Zika and Dengue Virus Infection in Humans. Mol Cell Proteomics 17:349-356
Yoon, Ki-Jun; Vissers, Caroline; Ming, Guo-Li et al. (2018) Epigenetics and epitranscriptomics in temporal patterning of cortical neural progenitor competence. J Cell Biol 217:1901-1914
Qian, Xuyu; Jacob, Fadi; Song, Mingxi Max et al. (2018) Generation of human brain region-specific organoids using a miniaturized spinning bioreactor. Nat Protoc 13:565-580
Ye, Fei; Kang, Eunchai; Yu, Chuan et al. (2017) DISC1 Regulates Neurogenesis via Modulating Kinetochore Attachment of Ndel1/Nde1 during Mitosis. Neuron 96:1041-1054.e5
Yoon, Ki-Jun; Song, Guang; Qian, Xuyu et al. (2017) Zika-Virus-Encoded NS2A Disrupts Mammalian Cortical Neurogenesis by Degrading Adherens Junction Proteins. Cell Stem Cell 21:349-358.e6
Wen, Zhexing; Song, Hongjun; Ming, Guo-Li (2017) How does Zika virus cause microcephaly? Genes Dev 31:849-861

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