PMID- 10495778 OWN - NLM STAT- MEDLINE DCOM- 19991014 LR - 20171116 IS - 0041-008X (Print) IS - 0041-008X (Linking) VI - 159 IP - 2 DP - 1999 Sep 1 TI - Selective modulation of B-cell activation markers CD86 and I-Ak on murine draining lymph node cells following allergen or irritant treatment. PG - 142-51 AB - It is well known that T cells are key effector cells in the development of allergic contact dermatitis. However, we and others have shown that mice exposed to contact allergens show a preferential increase in B lymphocytes in the draining lymph nodes (DLN) as seen by an increase in the percentage of B220+ or IgG/IgM+ cells. The purpose of the present investigation was to determine whether chemical allergens, in contrast to irritants, would modulate B-cell activation markers, CD86 and I-Ak, on B cells isolated from DLN of treated mice using the local lymph node assay (LLNA) protocol. Mice were treated on the ears for 3 consecutive days with concentrations of allergens (1-chloro-2,4-dinitrobenzene, alpha-hexylcinnamaldehyde, 4-ethoxymethylene-2-phenyl-2-oxazoline-5-one, and trinitrochlorobenzene), or irritants (benzalkonium chloride and sodium lauryl sulfate), which caused an increase in the number of DLN cells. The DLN were excised 72 h following the final chemical treatment, and the cells were prepared for analysis by flow cytometry. In mice treated with allergens an increase in the median intensity of I-AK and CD86 on B220+ or IgG/IgM+ B cells was observed compared to mice treated with irritants or vehicles. Mice treated with allergens demonstrated an increase in the median intensity of CD86 on B220+ B cells that was dose dependent and peaked at 72 h following the final allergen treatment. The increase in the median intensity of I-AK also was dose dependent but peaked at 96 h. Finally, T and B cells isolated from both allergen- and irritant-treated mice demonstrated an increase in [3H]thymidine incorporation compared to vehicle-treated and naive mice at 72 h following the final chemical treatment. The results suggest that B cells isolated from DLN of allergen-treated mice are activated and proliferating. Analysis of B-cell activation markers may be useful in differentiating allergen and irritant responses in the draining lymph nodes of chemically treated mice. FAU - Gerberick, G F AU - Gerberick GF AD - Miami Valley Laboratories, Procter & Gamble Company, Cincinnati, Ohio 45253-8707, USA. FAU - Cruse, L W AU - Cruse LW FAU - Miller, C M AU - Miller CM FAU - Ridder, G M AU - Ridder GM LA - eng PT - Comparative Study PT - Journal Article PL - United States TA - Toxicol Appl Pharmacol JT - Toxicology and applied pharmacology JID - 0416575 RN - 0 (Allergens) RN - 0 (Antibodies) RN - 0 (Antigens, CD) RN - 0 (B7-2 Antigen) RN - 0 (Biomarkers) RN - 0 (Cd86 protein, mouse) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (I-Ak antigen) RN - 0 (Immunoglobulin G) RN - 0 (Immunoglobulin M) RN - 0 (Immunoglobulins) RN - 0 (Irritants) RN - 0 (Membrane Glycoproteins) SB - IM MH - Allergens/*immunology/pharmacology MH - Animals MH - Antibodies MH - Antigens, CD/*analysis MH - B-Lymphocytes/*drug effects MH - B7-2 Antigen MH - Biomarkers MH - Dose-Response Relationship, Drug MH - Ear, External/drug effects MH - Female MH - Flow Cytometry MH - Histocompatibility Antigens Class II/*analysis MH - Immunoglobulin G/metabolism MH - Immunoglobulin M/metabolism MH - Immunoglobulins/*metabolism MH - Irritants/*immunology/pharmacology MH - Lymph Nodes/*drug effects MH - *Lymphocyte Activation MH - Membrane Glycoproteins/*analysis MH - Mice MH - Mice, Inbred CBA MH - T-Lymphocytes/drug effects MH - Time Factors EDAT- 1999/09/25 00:00 MHDA- 1999/09/25 00:01 CRDT- 1999/09/25 00:00 PHST- 1999/09/25 00:00 [pubmed] PHST- 1999/09/25 00:01 [medline] PHST- 1999/09/25 00:00 [entrez] AID - S0041-008X(99)98734-3 [pii] AID - 10.1006/taap.1999.8734 [doi] PST - ppublish SO - Toxicol Appl Pharmacol. 1999 Sep 1;159(2):142-51. doi: 10.1006/taap.1999.8734.