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English: COVID-19 pathogenesis. 1. A. SARS-CoV-2 enters the epithelial cell either via endocytosis or by membrane fusion through binding to ACE2 receptor and releasing its RNA into the cytoplasm. B. Viral RNA uses the cell's machinery to translate its viral non-structural and structural proteins and replicate its RNA. C. Viral structural proteins S, E, and M assemble in the rough endoplasmic reticulum (RER). D. Viral structures and nucleocapsid subsequently assemble in the endoplasmic reticulum golgi intermediate (ERGIC). E. New virion packed in golgi vesicles fuse with the plasma membrane and get released via exocytosis. 2. SARS-CoV-2 infection induces inflammatory factors that lead to activation of macrophages and dendritic cells. 3. Antigen presentation of SARS-CoV-2 via major histocompatibility complexes I and II (MHC I and II) stimulates humoral and cellular immunity resulting in cytokine and antibody production. 4. In severe COVID-19 cases, the virus reaches the lower respiratory tract and infects type II pneumocytes leading to apoptosis and loss of surfactant. The influx of macrophages and neutrophils induces a cytokine storm. Leaky capillaries lead to alveolar edema. Hyaline membrane is formed. All of these pathological changes result in alveolar damage and collapse, impairing gas exchange.
Date
Source

Chams N, Chams S, Badran R, Shams A, Araji A, Raad M, Mukhopadhyay S, Stroberg E, Duval EJ, Barton LM and Hajj Hussein I (2020) COVID-19: A Multidisciplinary Review. Front. Public Health 8:383.

https://doi.org/10.3389/fpubh.2020.00383
Author Nour Chams, Sana Chams, Reina Badran, Ali Shams, Abdallah Araji, Mohamad Raad, Sanjay Mukhopadhyay, Edana Stroberg, Eric J. Duval, Lisa M. Barton, and Inaya Hajj Hussein

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COVID-19 pathogenesis.

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29 July 2020

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current07:34, 11 February 2021Thumbnail for version as of 07:34, 11 February 20211,084 × 590 (513 KB)Guest2625Uploaded a work by Nour Chams, Sana Chams, Reina Badran, Ali Shams, Abdallah Araji, Mohamad Raad, Sanjay Mukhopadhyay, Edana Stroberg, Eric J. Duval, Lisa M. Barton, and Inaya Hajj Hussein from Chams N, Chams S, Badran R, Shams A, Araji A, Raad M, Mukhopadhyay S, Stroberg E, Duval EJ, Barton LM and Hajj Hussein I (2020) COVID-19: A Multidisciplinary Review. Front. Public Health 8:383. https://doi.org/10.3389/fpubh.2020.00383 with UploadWizard

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