The involvement of the lymphocyte function-associated antigen-1 (LFA-1) membrane molecule in cytolytic T lymphocyte (CTL) interactions with lymphoid target cells was investigated using CTL clones derived from two patients with a heritable deficiency of LFA-1. LFA-1 surface expression on the CTL clones was 1% of the normal level of LFA-1, unchanged with prolonged culture, and identical on 14 different CTL clones. The function of the LFA-1 molecule was addressed using the LFA-1-deficient CTL clones and LFA-1-deficient lymphoid target cells. The lytic activity of the LFA-1-deficient CTL clones was 43% of control when tested against a target cell line expressing normal levels of LFA-1 and less than 10% of control when tested against an LFA-1-deficient target cell line. These results demonstrate a direct involvement of LFA-1 in CTL-mediated cytolysis and suggest a more general dependence on LFA-1 in lymphoid cell-cell interactions.
S J Mentzer, B E Bierer, D C Anderson, T A Springer, S J Burakoff
Usage data is cumulative from April 2023 through April 2024.
Usage | JCI | PMC |
---|---|---|
Text version | 70 | 0 |
19 | 11 | |
Scanned page | 42 | 1 |
Citation downloads | 11 | 0 |
Totals | 142 | 12 |
Total Views | 154 |
Usage information is collected from two different sources: this site (JCI) and Pubmed Central (PMC). JCI information (compiled daily) shows human readership based on methods we employ to screen out robotic usage. PMC information (aggregated monthly) is also similarly screened of robotic usage.
Various methods are used to distinguish robotic usage. For example, Google automatically scans articles to add to its search index and identifies itself as robotic; other services might not clearly identify themselves as robotic, or they are new or unknown as robotic. Because this activity can be misinterpreted as human readership, data may be re-processed periodically to reflect an improved understanding of robotic activity. Because of these factors, readers should consider usage information illustrative but subject to change.