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- W1567807324 abstract "Abstract Phosphatidylserine (PS) modulates several immune functions in vitro, including T cell activation, antibody and cytokine production, and macrophage growth. In the present work we studied the effects of PS on the induction of contact hypersensitivity (CH) in mice. BALB/c mice painted with PS (9.4-75 mg/kg) and with a sensitizing dose of DNFB or oxazolone on the same skin site exhibited a dose-dependent augmentation of CH reactions to either DNFB (> 60%) or oxazolone (> 35%), respectively. Bovine brain PS-enriched phospholipid mixture, lyso-PS, and dipalmitoyl-PS also induced similar enhanced CH responses, whereas phosphatidylglycerols had no effect. Increased CH was observed only when PS was applied from 2 days before to 12 h after DNFB. Immunization of naive syngeneic mice with skin grafts that were treated with PS and DNFB also led to enhanced (> 50%) CH responses. In addition, immunization by iv injection of epidermal cell suspensions enriched for Langerhans cells (LC) or of purified LC that were treated with PS (1-100 microM, 30 min, 37 degrees C), and then modified in vitro with DNBS (1 mg/ml, 30 min, 37 degrees C) led to increased (> 30-75%) CH responses in recipient syngeneic animals. Finally, adoptive transfer of DNFB-immune lymph node cells obtained from mice that were treated with PS induced augmented CH responses in recipient animals. The results suggest that PS is capable of up-regulating the induction of CH in mice by stimulating the APC function of epidermal LC." @default.
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- W1567807324 date "1993-05-15" @default.
- W1567807324 modified "2023-10-18" @default.
- W1567807324 title "Phosphatidylserine enhances the ability of epidermal Langerhans cells to induce contact hypersensitivity." @default.
- W1567807324 doi "https://doi.org/10.4049/jimmunol.150.10.4236" @default.
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