Friday, August 27, 2021 This colorized scanning electron micrograph shows a type of helper T cell. (NIAID) Infection During Pregnancy in Mice 'Imprints' Immunity, and Inflammation, on Offspring Mice infected with a foodborne bacterium during pregnancy generated an immune response in the gut that protected the mother and imprinted that protective response in the developing offspring, NIAID scientists show in a new study published in Science. The maternal immune response to the infection, they reveal, uses protein signals that teach the developing fetal cells to remember the infection. The story isn't all rosy though: The researchers also discovered that those signaling proteins, interleukin 6 (IL-6), also make the developing fetus more prone to inflammatory disorders, such as colitis. The researchers plan additional studies of the maternal-fetal relationship and whether microbial and environmental changes – in animal models and people – can shift immune development from protective to inflammatory. |
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