Abstract

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a positive-sense single-stranded RNA virus that causes coronavirus disease 2019 (COVID-19). This respiratory illness was declared a pandemic by the world health organization (WHO) in March 2020, just a few weeks after being described for the first time. Since then, global research effort has considerably increased humanity’s knowledge about both viruses and disease. It has also spawned several vaccines that have proven to be key tools in attenuating the spread of the pandemic and severity of COVID-19. However, with vaccine-related skepticism being on the rise, as well as breakthrough infections in the vaccinated population and the threat of a complete immune escape variant, alternative strategies in the fight against SARS-CoV-2 are urgently required. Calcium signals have long been known to play an essential role in infection with diverse viruses and thus constitute a promising avenue for further research on therapeutic strategies. In this review, we introduce the pivotal role of calcium signaling in viral infection cascades. Based on this, we discuss prospective calcium-related treatment targets and strategies for the cure of COVID-19 that exploit viral dependence on calcium signals.

Highlights

  • In late 2019, a novel, zoonotic coronavirus named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was described in southeastern China

  • The use of inhibitors specific for calcium ion channels was successfully proven to be effective against influenza A virus, Japanese encephalitis virus (JEV), hemorrhagic fever arenavirus (NWA), or ebolavirus [27,29,30,31,32]

  • First described in 1986 [42], store-operated calcium (SOC) channels in the plasma membrane (PM) provide a mechanism for raising the cytosolic calcium concentration in cells through a process termed store-operated calcium entry (SOCE)

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Summary

Introduction

In late 2019, a novel, zoonotic coronavirus named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was described in southeastern China. Due to the importance of calcium in viral infections, several calcium entry and cellular signaling pathways are considered as feasible drug target sites In this regard, the use of inhibitors specific for calcium ion channels was successfully proven to be effective against influenza A virus, Japanese encephalitis virus (JEV), hemorrhagic fever arenavirus (NWA), or ebolavirus [27,29,30,31,32]. The use of inhibitors specific for calcium ion channels was successfully proven to be effective against influenza A virus, Japanese encephalitis virus (JEV), hemorrhagic fever arenavirus (NWA), or ebolavirus [27,29,30,31,32] Based on these results, this review addresses the potential positive effects of calcium-related treatment targets and strategies to modulate calcium entry and cellular signaling pathways on the outcome of SARS-CoV-2 infections and COVID-19

Calcium Ion Channels and SARS-CoV-2
Store-Operated Channels
Auxiliary Non-Channel Proteins
Transient Receptor Potential Channels
Emerging Treatment Strategies
Voltage-Gated Channels
Discussion and Conclusions
Findings
Discussion
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