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Natural killer cell activity in the rat. V. Circulation patterns and tissue localization of peripheral blood large granular lymphocytes (LGL)

Conference · · J. Immunol.; (United States)
OSTI ID:6845991
Large granular lymphocytes (LGL) and T cells were separated from blood by centrifugation on discontinuous gradients of Percoll, were labeled with (/sup 3/H)uridine or (/sup 111/In)oxine, and were injected i.v. into syngeneic euthymic or athymic nude rats. The tissue distribution of these labeled cells was monitored for up to 24 hr after transfer by scintillation counting of tissue homogenates and autoradiography of tissue sections. In normal euthymic rats, the main sites of LGL localization were the alveolar walls of the lungs and spleen red pulp; however, they were not detectable in the major traffic areas of T lymphocyte recirculation, the spleen white pulp, and lymph nodes. Furthermore, the density of labeled LGL was very low in the small intestine, thymus, kidney, and liver, although on a per-organ basis, about 10% of the injected radioactivity was found in the liver by 24 hr post-injection. When /sup 111/In-labeled LGL were injected i.v. into rats with an indwelling thoracic duct cannula, they completely failed to enter the thoracic duct lymphocyte (TDL) population over an observation period of 6 days. These findings define the areas within the lungs and spleen in which blood LGL normally localize, and clearly demonstrate that LGL do not normally recirculate between blood and lymph.
Research Organization:
National Institute of Health, Frederick, MD
OSTI ID:
6845991
Conference Information:
Journal Name: J. Immunol.; (United States) Journal Volume: 136:8
Country of Publication:
United States
Language:
English

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