By Stanley Cohen
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Additional resources for Biology of the Lymphokines
Very little information is available on lymphokines with chemotactic activities for neutrophils (Altman, 1978). Ward et al. (1970) described a soluble factor found in antigen-stimulated guinea pig lym phocyte cultures that attracts neutrophils in the Boyden double chamber assay and is distinct from MCF and MIF. T h e potency of this factor is considerably less than the MCF potency described in the same system and this may possibly explain the paucity of neutrophils relative to mononuclear cells in some delayed hypersensitivity reactions.
Andreis and co-workers (1974) reported that P P 2. LYMPHOKINES AS INFLAMMATORY MEDIATORS 43 chronic synovitis could be induced in rabbits following three intraarticu lar injections of concentrated MIF-containing supernatants. T h e result ing synovitis was characterized by synovial effusion, hyperplasia of the lining layer, and infiltration of the sublining layers with mononuclear cells and some fibroblasts. Injection of the concentrated control super natant into the contralateral joint did not result in inflammation.
V. injection of an antigen bolus. , the one receiving the high dose of antigen, showed no skin reactivity to antigen nor were there lymphocytes capable of producing MIF in vitro. v. with saline) demonstrated no serum MIF but manifested cutaneous de layed hypersensitivity to the antigen and their lymphocytes exhibited significant MIF production in vitro. T h e serum MIF in the desensitized animals was a transient response, since they demonstrated the same reactivity as the controls 7 days after antigen challenge.