Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Persistent and transient olfactory deficits in COVID-19 are associated to inflammation and zinc homeostasis

ABSTRACT: The Coronavirus Disease 2019 (COVID-19) is mainly a respiratory syndrome that can affect multiple organ systems, causing a variety of symptoms. Among the most common and characteristic symptoms are deficits in smell and taste perception, which may last for weeks/months after COVID-19 diagnosis owing to mechanisms that are not fully elucidated. In order to identify the determinants of olfactory symptom persistence, we obtained olfactory mucosa (OM) from 21 subjects, grouped according to clinical criteria: i) with persistent olfactory symptoms; ii) with transient olfactory symptoms; iii) without olfactory symptoms; and iv) non-COVID-19 controls. Cells from the olfactory mucosa were harvested for transcriptome analyses. RNA-Seq assays showed that gene expression levels are altered for a long time after infection. The expression profile of micro RNAs appeared significantly altered after infection, but no relationship with olfactory symptoms was found. On the other hand, patients with persistent olfactory deficits displayed increased levels of expression of genes involved in the inflammatory response and zinc homeostasis, suggesting an association with persistent or transient olfactory deficits in individuals who experienced SARS-CoV-2 infection.

ORGANISM(S): Homo sapiens

PROVIDER: GSE209806 | GEO | 2023/07/11

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Visualizing in deceased COVID-19 patients how SARS-CoV-2 attacks the respiratory and olfactory mucosae but spares the olfactory bulb

Project description:Anosmia, the loss of smell, is a common and often the sole symptom of COVID-19. The onset of the sequence of pathobiological events leading to olfactory dysfunction remains obscure. Here, we have developed a postmortem bedside surgical procedure to harvest endoscopically samples of respiratory and olfactory mucosae and whole olfactory bulbs. Our cohort of 85 cases included COVID-19 patients who died a few days after infection with SARS-CoV-2, enabling us to catch the virus while it was still replicating. We found that sustentacular cells are the major target cell type in the olfactory mucosa. We failed to find evidence for infection of olfactory sensory neurons, and the parenchyma of the olfactory bulb is spared as well. Thus, SARS-CoV-2 does not appear to be a neurotropic virus. We postulate that transient insufficient support from sustentacular cells triggers transient olfactory dysfunction in COVID-19. Olfactory sensory neurons would become affected without getting infected.

2021-10-24 | GSE176080 | GEO

Transcriptomics in olfactory cells transfected with SARS-CoV-2 structural proteins

Project description:One of the most common symptoms in COVID-19 is a sudden loss of smell. SARS-CoV-2 has been detected in the olfactory bulb (OB) from animal models and sporadically in COVID-19 patients. To decipher the specific role of SARS-CoV-2 proteome at olfactory level, we deeply characterized the molecular imbalance induced by the expression of GFP-tagged SARS-CoV-2 structural proteins (M, N, E, S) on mouse OB cells by RNA-seq.

2022-09-28 | GSE182849 | GEO

Non-neuronal expression of SARS-CoV-2 entry genes in the olfactory system suggests mechanisms underlying COVID-19-associated anosmia (scRNA-seq: olfactory bulb)

Project description:A subset of COVID-19 patients exhibit altered olfactory function. Here we analyze bulk and single cell RNA-Seq datasets to identify cell types in the olfactory epithelium and olfactory bulb that express cell entry molecules that mediate infection by SARS-CoV-2 (CoV-2), the causal agent in COVID-19. We find that samples from whole olfactory mucosa in species including mouse and human express two key genes involved in CoV-2 entry, ACE2 and TMPRSS2. However, neither olfactory sensory neurons nor olfactory bulb neurons express these genes, which are instead expressed in support cells, stem cells, and perivascular cells. These findings suggest that CoV-2 infection of non-neuronal cell types leads to anosmia and related disturbances in odor perception in COVID-19 patients.

2020-07-30 | GSE148360 | GEO

Non-neuronal expression of SARS-CoV-2 entry genes in the olfactory system suggests mechanisms underlying COVID-19-associated anosmia (scRNA-seq: olfactory mucosa)

2020-07-30 | GSE151346 | GEO

Persistent and transient olfactory deficits in COVID-19 are associated to inflammation and zinc homeostasis

Project description:Persistent and transient olfactory deficits in COVID-19 are associated to inflammation and zinc homeostasis

| PRJNA862505 | ENA

Next Generation Sequencing Facilitates Quantitative Analysis of Mock/SARS-CoV-2 Infected humanized ACE2 Mice Olfactory Epithelium and Olfactory Bulb Transcriptomes

Project description:SARS-CoV-2 infection causes a wide spectrum of clinical manifestations in human, and olfactory dysfunction represents as one of the most predictive and common symptoms in COVID-19 patients. Herein we demonstrate intranasal inoculation of SARS-CoV-2 induces robust viral replication in the olfactory epithelium (OE), not olfactory bulb (OB), resulting in transient olfactory dysfunction in humanized ACE2 mice. To decipher the underlying mechanism of the observed olfactory dysfunction in SARS-CoV-2 infected mice at the molecular level, RNA-Seq analyses of the OE and OB samples from SARS-CoV-2 infected mice were performed in comparison with that from the control animals.

2021-07-12 | GSE173186 | GEO

COVID_19 lung autopsy samples

Project description:The SARS-CoV-2 has already caused over 523 million COVID-19 cases and 6.27 million deaths worldwide. COVID-19 leads to a severe acute respiratory syndrome, a hyperinflammatory response, and widespread multi-organ damage. Common symptoms of COVID-19 include fever, cough, fatigue, shortness of breath, and loss of taste and smell. Here we offer an in-depth analysis of the transcriptional response to SARS-CoV-2. We performed RNA-seq analysis of lung tissues from three COVID-19 patients.

2022-09-07 | GSE203401 | GEO

SARS-CoV-2 infection causes transient olfactory dysfunction in mice

Project description:SARS-CoV-2 infection causes a wide spectrum of clinical manifestations in human, and olfactory dysfunction represents as one of the most predictive and common symptoms in COVID-19 patients. However, the underlying mechanism how SARS-CoV-2 infection leads to olfactory disorders remains elusive. Herein we demonstrate intranasal inoculation of SARS-CoV-2 induces robust viral replication in the olfactory epithelium (OE), not olfactory bulb (OB), resulting in transient olfactory dysfunction in humanized ACE2 mice. The sustentacular cells and Bowman's gland cells in the OE were identified as the major target cells of SARS-CoV-2 before the invasion into olfactory sensory neurons. Remarkably, SARS-CoV-2 infection triggers massive cell death and immune cell infiltration, and directly impairs the uniformity of OE structure. Combined transcriptomic and quantitative proteomic analyses reveal the induction of antiviral and inflammatory responses, as well as the downregulation of olfactory receptor (OR) genes in the OE from the infected animals. Overall, our mouse model recapitulates the olfactory dysfunction in COVID-19 patients, and provides critical clues to understand the physiological basis for extrapulmonary manifestations of COVID-19.

2021-06-22 | PXD026854 |

Expansion of profibrotic monocyte-derived alveolar macrophages in patients with persistent respiratory symptoms and radiographic abnormalities after COVID-19 [PASC]

Project description:As many as 10–30% of the nearly 750 million survivors of COVID-19 develop persistent symptoms that define the post-acute sequelae of COVID-19 (PASC) syndrome. To understand the molecular basis of this syndrome, we combined a machine learning based analysis of lung computed tomography (CT) with flow cytometry and single cell RNA-sequencing analysis of bronchoalveolar lavage fluid and nasal curettage samples in a cohort of thirty-five patients with respiratory symptoms and radiographic abnormalities more than 90 days after infection with COVID-19. CT images from patients with PASC revealed primarily fibrotic abnormalities involving 73 +/- 28% of the lung, most of which improved on subsequent imaging. The presence of profibrotic monocyte-derived alveolar macrophages in BAL fluid was significantly associated with increased levels of alveolar cytokines and fibrotic abnormalities on CT. Persistent infection with SARS-CoV-2 was identified in 6 patients and secondary bacterial or viral infections in two others. These findings suggest persistent alveolar inflammation characterized by the ongoing recruitment of monocyte derived alveolar macrophages is associated with fibrotic CT changes in some COVID-19 survivors with implications for diagnosis and therapy.

2024-05-12 | GSE232627 | GEO

Expansion of profibrotic monocyte-derived alveolar macrophages in patients with persistent respiratory symptoms and radiographic abnormalities after COVID-19 [NEP]

2024-05-12 | GSE232623 | GEO