Lymphocyte in vitro cytotoxicity: mechanism of human lymphotoxin-induced target cell destruction.
- Author(s): Williams, TW
- Granger, GA
- et al.
Published Web Locationhttps://doi.org/10.1016/0008-8749(73)90020-8
These in vitro studies were conducted in an attempt to elucidate the mechanism of how cell-free supernatant fluids obtained from PHA-stimulated human lymphocytes cause destruction of cells. The undiluted supernatant fluids with high activity exerted a nonspecific cytotoxic effect on many different continuous cell lines. However, upon dilution, a wide spectrum of cell sensitivities was observed. These studies suggest human lymphotoxin acts by first absorbing to receptors on the target cell plasma membrane. The next effect is shut-down of cellular DNA synthesis, followed later by a decrease in cell numbers and finally, cellular destruction. Once sufficient LT has bound to the target cell surface, the cytopathic effect is irreversible. A role for LT in lymphocyte-mediated tissue destruction is discussed. © 1973.