Immune functions in the mouse intestine differ by segment.

The move reflects scientists using more cell lines and organoids in genetic research, although some experts disagree with the decision to scale back the use of animal models.

An experiment delves into how the microbiome shapes immunity.

See a mouse organoid imaged using two-photon microscopy.

Scientists map the presence of Helicobacter pylori in the stomach of mice, showing where the bacteria colonize the gastric glands.

Researchers treat mice with retinitis pigmentosa using a gene therapy that reduces cone loss.

An experiment tests whether a protein treatment can help hematopoietic stem cells recover after mice are exposed to radiation.

CRISPR reagents injected into the amniotic fluid inactivated a gene in the fetuses that would normally cause lung disease and kill the mice a few hours after birth.

Organoids grown from a mouse’s colon will be used to screen drugs for colorectal cancer.