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Choroid plexus defects in Down syndrome brain organoids enhance neurotropism of SARS-CoV-2

ABSTRACT: Why individuals with Down Syndrome (DS, trisomy 21) are particularly susceptible to SARS-CoV-2 induced disease remains largely unclear. The choroid plexus secrets the cerebrospinal fluid and strongly expresses the ACE2 receptor and the chromosome 21 encoded TMPRSS2 protease. To investigate the role of the choroid plexus in SARS-CoV-2 central nervous system infection in DS, we established a new type of brain organoid from DS and isogenic euploid control iPSC that consists of a core of appropriately patterned functional cortical neuronal cell types that is surrounded by a patent and functional choroid plexus (CPCOs). Remarkably, DS-CPCOs not only recapitulated abnormal features of DS cortical development but also revealed defects in ciliogenesis and epithelial cell polarity of the developing choroid plexus. We next demonstrate that the choroid plexus layer facilitates SARS-CoV-2 replication and infection of cortical neuronal cells, and that this is increased in DS-CPCOs. We further show that inhibition of TMPRSS2 activity in DS-CPCOs inhibits SARS-CoV-2 infectivity. We conclude that CPCOs are a useful model for dissecting the role of the choroid plexus in euploid and DS forebrain development and enables screening for therapeutics that can inhibit SARS-CoV-2 induced neuro-pathogenesis.

ORGANISM(S): Homo sapiens

PROVIDER: GSE208575 | GEO | 2022/07/26

REPOSITORIES: GEO

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Choroid plexus defects in Down syndrome brain organoids enhance neurotropism of SARS-CoV-2

Project description:Why individuals with Down Syndrome (DS, trisomy 21) are particularly susceptible to SARS-CoV-2 induced disease remains largely unclear. The choroid plexus secrets the cerebrospinal fluid and strongly expresses the ACE2 receptor and the chromosome 21 encoded TMPRSS2 protease. To investigate the role of the choroid plexus in SARS-CoV-2 central nervous system infection in DS, we established a new type of brain organoid from DS and isogenic euploid control iPSC that consists of a core of appropriately patterned functional cortical neuronal cell types that is surrounded by a patent and functional choroid plexus (CPCOs). Remarkably, DS-CPCOs not only recapitulated abnormal features of DS cortical development but also revealed defects in ciliogenesis and epithelial cell polarity of the developing choroid plexus. We next demonstrate that the choroid plexus layer facilitates SARS-CoV-2 replication and infection of cortical neuronal cells, and that this is increased in DS-CPCOs. We further show that inhibition of TMPRSS2 activity in DS-CPCOs inhibits SARS-CoV-2 infectivity. We conclude that CPCOs are a useful model for dissecting the role of the choroid plexus in euploid and DS forebrain development and enables screening for therapeutics that can inhibit SARS-CoV-2 induced neuro-pathogenesis.

2023-10-16 | GSE208440 | GEO

Human Pluripotent Stem Cell-Derived Neural Cells and Brain Organoids Reveal SARS-CoV-2 Neurotropism Predominates in Choroid Plexus Epithelium

Project description:Neurological complications are common in patients with COVID-19. While SARS-CoV-2, the causal pathogen of COVID-19, has been detected in some patient brains, its ability to infect brain cells and impact their function are not well understood, and experimental models using human brain cells are urgently needed. Here we investigated the susceptibility of human induced pluripotent stem cell (hiPSC)-derived monolayer brain cells and region-specific brain organoids to SARS-CoV-2 infection. We found modest numbers of infected neurons and astrocytes, but greater infection of choroid plexus epithelial cells. We optimized a protocol to generate choroid plexus organoids from hiPSCs, which revealed productive SARS-CoV-2 infection that leads to increased cell death and transcriptional dysregulation indicative of an inflammatory response and cellular function deficits. Together, our results provide evidence for SARS-CoV-2 neurotropism and support use of hiPSC-derived brain organoids as a platform to investigate the cellular susceptibility, disease mechanisms, and treatment strategies for SARS-CoV-2 infection.

2020-09-23 | GSE157852 | GEO

The landscape of human brain immune response in patients with severe COVID-19

Project description:Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, has been associated with neurological and neuropsychiatric illness in many individuals. We sought to further our understanding of the relationship between brain tropism, neuro-inflammation and host immune response in acute COVID-19 cases. 3 brain regions (dorsolateral prefrontal cortex, medulla oblongata and choroid plexus) from 5 patients with severe COVID-19 and 4 controls were examined. The presence of virus was assessed by western blot against viral spike protein, as well as viral transcriptome analysis covering >99% of SARS-CoV-2 genome and all potential serotypes. Droplet-based single-nucleus RNA sequencing (snRNA-seq) was performed in the same samples to examine the impact of COVID-19 on transcription in individual cells of the brain. Quantification of viral spike S1 protein and viral transcripts did not detect SARS-CoV-2 in the postmortem brain tissue. However, analysis of 68,557 single-nucleus transcriptomes from three distinct regions of the brain identified an increased proportion of stromal cells, monocytes and macrophages in the choroid plexus of COVID-19 patients. Furthermore, differential gene expression, pseudo-temporal trajectory and gene regulatory network analyses revealed transcriptional changes in cortical microglia associated with a range of biological processes, including cellular activation, mobility and phagocytosis. Despite the absence of detectable SARS-CoV-2 in the brain at time of death, the findings suggest significant and persistent neuroinflammation in patients with acute COVID-19.

2021-06-16 | GSE164485 | GEO

Choroid plexus defects in Down syndrome brain organoids enhance neurotropism of SARS-CoV-2

Project description:Choroid plexus defects in Down syndrome brain organoids enhance neurotropism of SARS-CoV-2

| PRJNA859925 | ENA

Choroid plexus defects in Down syndrome brain organoids enhance neurotropism of SARS-CoV-2

Project description:Choroid plexus defects in Down syndrome brain organoids enhance neurotropism of SARS-CoV-2

| PRJNA860166 | ENA

The respective roles of TMPRSS2 and cathepsins for SARS-CoV-2 infection in human respiratory organoids

Project description:A critical aspect of the mechanism of SARS-CoV-2 infection is the protease-mediated activation of the viral spike (S) protein. The type II transmembrane serine protease TMPRSS2 is crucial for SARS-CoV-2 infection in lung epithelial Calu-3 cells and murine airways. However, the importance of TMPRSS2 needs to be re-examined because the ability to utilize TMPRSS2 is significantly reduced in the Omicron variants that spread globally. For this purpose, replication profiles of SARS-CoV-2 were analyzed in human respiratory organoids. All tested viruses, including Omicron variants, replicated efficiently in these organoids. Notably, all SARS-CoV-2 strains retained replication ability in TMPRSS2-gene knockout (KO) respiratory organoids, suggesting that TMPRSS2 is not essential for SARS-CoV-2 infection in human respiratory tissues. However, TMPRSS2-gene knockout significantly reduces the inhibitory effect of nafamostat, suggesting the advantage of TMPRSS2-utilizing ability for the SARS-CoV-2 infection in these organoids. Interestingly, Omicron variants regained the TMPRSS2-utilizing ability in recent subvariants. The basal infectivity would be supported mainly by cathepsins because the cathepsin inhibitor, EST, showed a significant inhibitory effect on infection with any SARS-CoV-2 strains, mainly when used with nafamostat. A supplementary contribution of other serine proteases was also suggested because the infection of the Delta variant was still inhibited partially by nafamostat in TMPRSS2 KO organoids. Thus, various proteases, including TMPRSS2, other serine proteases, and cathepsins, co-operatively contribute to SARS-CoV-2 infection significantly in the respiratory organoids. Thus, SARS-CoV-2 infection in the human respiratory tissues would be more complex than observed in cell lines or mice.

2024-11-20 | GSE279753 | GEO

Distinct mechanisms for TMPRSS2 expression explain organ-specific inhibition of SARS-CoV-2 infection by enzalutamide [ATAC-Seq]

Project description:The coronavirus disease 2019 (COVID-19) pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has rapidly become a global public health threat due to the lack of effective drugs or vaccines against SARS-CoV-2. The efficacy of several repurposed drugs has been evaluated in clinical trials. Among these drugs, a second second-generation antiandrogen agent, enzalutamide, was proposed because it reduces the expression of transmembrane serine protease 2 (TMPRSS2), a key component mediating SARS-CoV-2-driven entry into host cells, in prostate cancer cells. However, definitive evidence for the therapeutic efficacy of enzalutamide in COVID-19 is lacking. Here, we evaluated the antiviral efficacy of enzalutamide in prostate cancer cells, lung cancer cells, human lung organoids and SARS-CoV-2-infected Ad-ACE2-transduced Tmprss2 knockout (Tmprss2-KO) and wild-type (WT) mice. TMPRSS2 knockout significantly inhibited SARS-CoV-2 infection in vivo. Enzalutamide effectively inhibited SARS-CoV-2 infection in human prostate cells, however, such antiviral efficacy of enzalutamide was lacking in human lung cells and organoids. Although Tmprss2 knockout effectively blocked SARS-CoV-2 infection in ACE2-transduced mice, Accordingly, enzalutamide showed no antiviral activity due to the AR-independent TMPRSS2 expression in mouse and human lung epithelial cells. Moreover, we observed distinct AR binding patterns between prostate cells and lung cells and a lack of direct binding of AR to TMPRSS2 in human lung cells. Thus, our findings do not support the postulated protective role of enzalutamide in treating COVID-19 through reducing TMPRSS2 expression in lung cells.

2020-12-22 | GSE163624 | GEO

Distinct mechanisms for TMPRSS2 expression explain organ-specific inhibition of SARS-CoV-2 infection by enzalutamide [ChIP-Seq]

2020-12-22 | GSE163623 | GEO

Age-determined expression of priming protease TMPRSS2 and localization of SARS-CoV-2 in lung epithelium

Project description:The SARS-CoV-2 novel coronavirus global pandemic (COVID-19) has led to millions of cases and hundreds of thousands of deaths globally. While older adults appear at high risk for severe disease, hospitalizations and deaths due to SARS-CoV-2 among children have been relatively rare. Integrating single-cell RNA sequencing (scRNA-seq) of developing mouse lung with temporally-resolved immunofluorescence in mouse and human lung tissue, we found expression of SARS-CoV-2 Spike protein primer TMPRSS2 was highest in ciliated cells and type I alveolar epithelial cells (AT1), and TMPRSS2 expression increased with aging in mice and humans. Analysis of autopsy tissue from fatal COVID-19 cases detected SARS-CoV-2 RNA most frequently in ciliated and secretory cells in airway epithelium and AT1 cells in peripheral lung. SARS-CoV-2 RNA was highly colocalized in cells expressing TMPRSS2. Together, these data demonstrate the cellular spectrum infected by SARS-CoV-2 in lung epithelium and suggest that developmental regulation of TMPRSS2 may underlie the relative protection of infants and children from severe respiratory illness.

2020-11-13 | GSE160876 | GEO

Brain heterotopia formation by ciliopathic breakdown of neuroepithelial and blood-cerebrospinal fluid barriers

Project description:In this study, we found that ablation of genes encoding ciliary transport proteins such as intraflagellar transport homolog 88 (Ift88) and kinesin family member 3a (Kif3a) in cortical radial progenitors led to periventricular heterotopia during late mouse embryogenesis. Conditional mutation of primary cilia unexpectedly caused breakdown of both the neuroepithelial lining and the blood-choroid plexus barrier. Choroidal leakage was partially caused by enlargement of the choroid plexus in the cilia mutants. We found that the choroid plexus expressed platelet-derived growth factor A (Pdgf-A) and that Pdgf-A expression was ectopically increased in cilia-mutant embryos. Cortices obtained from embryos in utero electroporated with Pdgfa mimicked periventricular heterotopic nodules of the cilia mutant.

2023-01-10 | PXD038557 | Pride

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