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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...

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Measuring Attachment and Internalization of Influenza A Virus in A549 Cells by Flow Cytometry

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Multiple sphingolipid-metabolizing enzymes modulate influenza virus replication.

Savannah McKenna¹, Kwang Il Jung¹, Jennifer J Wolf¹

¹Departments of Surgery & Molecular Microbiology and Immunology, University of Missouri, Columbia, MO, 65212, USA.

|January 4, 2025

Summary

This summary is machine-generated.

Sphingolipid metabolism enzymes regulate influenza virus replication. Inhibiting sphingosine kinase 2 (SphK2) shows promise for treating influenza, highlighting the sphingolipid pathway

Keywords:

COVID-19 Influenza virus S1P lyase Sphingolipid Sphingomyelinase Sphingosine kinase

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Area of Science:

Lipid metabolism
Virology
Biochemistry

Background:

The sphingolipid network, crucial for cellular functions, plays a role in various diseases, including viral infections.
Sphingolipid-metabolizing enzymes are key regulators within this network.
The COVID-19 pandemic spurred research into sphingosine kinase 2 (SphK2) inhibitors for therapeutic applications.

Purpose of the Study:

To review the roles of sphingolipid-metabolizing enzymes in the influenza virus life cycle.
To explore the mechanisms underlying the interplay between influenza virus and the sphingolipid pathway.
To highlight the therapeutic potential of targeting the sphingolipid system for influenza treatment.

Main Methods:

Literature review focusing on sphingolipid metabolism and influenza virus research.
Analysis of pre-clinical data on sphingosine kinase inhibitors in influenza models.
Examination of enzymatic regulation of viral replication and propagation.

Main Results:

Multiple sphingolipid-metabolizing enzymes have been identified as regulators of influenza virus replication.
Pre-clinical studies demonstrated that SphK2 inhibitors effectively protected mice from influenza-induced illness and death.
The sphingolipid pathway presents a significant target for antiviral strategies.

Conclusions:

The balance of bioactive sphingolipids and their metabolizing enzymes is critical for cellular health and disease.
Targeting sphingolipid-metabolizing enzymes, particularly SphK2, offers a promising therapeutic avenue for influenza.
Basic and translational research on the sphingolipid system is vital for advancing human health and combating viral infections.