Influenza A Virus Disrupts 14 Paraspeckle Proteins, Boosting Replication via NEAT1 RNA Loss
Updated
Updated · Nature.com · Jul 20
Influenza A Virus Disrupts 14 Paraspeckle Proteins, Boosting Replication via NEAT1 RNA Loss
3 articles · Updated · Nature.com · Jul 20
Summary
Researchers mapped 198 influenza A virus-host protein pairs in infected human cells and found the virus consistently dismantles paraspeckles—nuclear RNA-protein compartments—across multiple cell lines, primary airway cells and H1N1/H3N2 strains.
NP and NS1 bound 14 paraspeckle proteins, while PA-X cut the scaffold RNA NEAT1_2 and viral inhibition of RNA polymerase II further weakened the structures, producing a three-part mechanism for paraspeckle disassembly.
Paraspeckles began collapsing between 4 and 8 hours after infection, before NEAT1_2 levels fell by 50% at 12 hours in A549 cells, indicating structural breakup starts ahead of major RNA loss.
Functional tests showed the disruption helps the virus: NEAT1 and NONO knockout raised replication about 2- to 2.5-fold, while restoring NONO reduced viral replication and titers.
The same in-cell cross-linking study also traced hemagglutinin maturation through ER-Golgi host factors, offering a native interaction map that could guide future influenza drug targeting.
AI helped reveal the flu's deepest secrets. What other viral mysteries will be solved by combining biology with artificial intelligence?
The flu virus turns our cells into factories. Can we now develop drugs to shut down its production line for good?
The flu virus destroys cellular parts to thrive. Could targeting these same parts be a radical new way to treat heart disease?
Unveiling Influenza A’s Hidden Weapon: Paraspeckle Disruption and Its Implications for Antiviral Therapy
Overview
A groundbreaking study published in Nature in 2026 revealed a new viral strategy used by Influenza A Virus (IAV) to gain an advantage in host cells. The research showed that IAV actively causes the breakdown of paraspeckles, which are specialized compartments in the cell nucleus important for gene expression and RNA processing. This phenomenon was consistently observed across different human cell lines and flu strains, highlighting its significance as a general viral mechanism. By fundamentally altering the cellular environment, IAV manipulates host cell functions to support its own replication and survival.