Volume 615 Issue 7951



News Features

News & Views

How an anxious heart talks to the brain p.217

During periods of anxiety, the brain affects the heart, but does a racing heart also talk to the brain to cause anxiety-related behaviour? Use of a light-stimulated pacemaker in mice shows that it does, and pinpoints a brain region involved.

doi: 10.1038/d41586-023-00502-6

MicroRNA uses a gym to get fit for cuts by Dicer enzyme p.218

The enzyme Dicer cleaves a type of RNA called a pre-microRNA to make the mature functional RNA. Structural evidence now sheds light on the catalytic mechanism involved and the role of a newly found RNA sequence termed GYM.

doi: 10.1038/d41586-023-00478-3

How wildfires deplete ozone in the stratosphere p.219

Unexpected smoke-particle chemistry is shown to be the link between intense wildfires and stratospheric ozone loss. As the climate changes, more-frequent and more-intense fires might delay the recovery of the stratospheric ozone layer.

doi: 10.1038/d41586-023-00598-w

Path unveiled for protein entry into chloroplasts p.222

Structures of the machinery for importing proteins into chloroplast organelles of algae, determined using cryo-electron microscopy, have opened a new chapter in efforts to understand how chloroplasts are built.

doi: 10.1038/d41586-023-00539-7

Fatty acids prime the lung as a site for tumour spread p.224

The mechanisms that enable the deadly spread of cancer are not fully understood. It emerges that tumours can signal to the lung to manipulate lipids and so prime the organ to support tumour cells that subsequently spread there.

doi: 10.1038/d41586-023-00538-8