Skip to main content
Email Print Share

All Images

News Release 06-141

"Killer" B Cells Provide New Link in the Evolution of Immunity

Immune cells play different roles in fish and mammals

This material is available primarily for archival purposes. Telephone numbers or other contact information may be out of date; please see current contact information at media contacts.

Back to article | Note about images

The trout cell in the lower left is in the process of engulfing tiny latex beads (arrow).

In the adaptive immune system in mammals, B cells produce antibodies to fight infection. In the more-primitive innate immunity in fish, scientists found that B cells take part in a process known as phagocytosis, by which immune system cells ingest foreign particles and microbes. The round cell in the lower left is B-cell ike from a trout. It is in the process of engulfing three latex beads, each (arrow) about 1 micron in diameter.

Image for use only with news articles about the research.

Credit: J. Oriol Sunyer, School of Veterinary Medicine, University of Pennsylvania; image taken with the assistance of R. Meade, Biomedical Imaging Core Laboratory of the School of Medicine, University of Pennsylvania.

Download the high-resolution JPG version of the image. (39 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.