PMID- 14660057 OWN - NLM STAT- MEDLINE DCOM- 20040428 LR - 20171116 IS - 1025-3890 (Print) IS - 1025-3890 (Linking) VI - 6 IP - 4 DP - 2003 Dec TI - Stress applied during primary immunization affects the secondary humoral immune response in the rat: involvement of opioid peptides. PG - 247-58 AB - The effect of unpredictable, inescapable and uncontrollable electric tail shocks (ES) on the humoral immune response to bovine serum albumin (BSA) was investigated in the rat. Contributions of the procedures that accompany shock delivery, such as witnessing the ES procedure (stress witnessing, SW) and exposure to the apparatus for shock delivery (apparatus control, AC) to the changes in specific immunity induced by ES were also tested. All procedures were applied during primary and/or secondary immunization. It was demonstrated that exposure to ES during primary immunization with BSA significantly suppressed specific anti-BSA antibody production after secondary and tertiary immunization with the same antigen. Exposure to the SW procedure during primary immunization with BSA enhanced the specific antibody level after secondary immunization, while exposure to the apparatus alone did not influence the development of either the primary or secondary humoral immune response to BSA. Both ES-induced suppression and SW-induced potentiation of the humoral immune response were partially inhibited by prior treatment with the opioid receptor antagonist naloxone. Additionally, treatments with the opioid peptides methionine- and leucine-enkephalin decreased anti-BSA antibody level, mimicking to some extent the effects of ES. It is suggested that ES and endogenous opioid peptides had long-term effects on humoral immunity through mechanisms involving immunologic memory. FAU - Stanojevic, Stanislava AU - Stanojevic S AD - Immunology Research Center "Branislav Jankovic, Institute of Immunology and Virology, Belgrade, Serbia. canac@eunet.yu FAU - Dimitrijevic, Mirjana AU - Dimitrijevic M FAU - Kovacevic-Jovanovic, Vesna AU - Kovacevic-Jovanovic V FAU - Miletic, Tatjana AU - Miletic T FAU - Vujic, Vesna AU - Vujic V FAU - Radulovic, Jelena AU - Radulovic J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Stress JT - Stress (Amsterdam, Netherlands) JID - 9617529 RN - 0 (Antibodies) RN - 0 (Narcotic Antagonists) RN - 0 (Opioid Peptides) RN - 27432CM55Q (Serum Albumin, Bovine) RN - 36B82AMQ7N (Naloxone) RN - 58569-55-4 (Enkephalin, Methionine) RN - 58822-25-6 (Enkephalin, Leucine) SB - IM MH - Animals MH - Antibodies/analysis MH - Antibody Formation MH - Cattle MH - Electroshock MH - Enkephalin, Leucine/pharmacology MH - Enkephalin, Methionine/pharmacology MH - *Immunity MH - *Immunization MH - Immunization, Secondary MH - Male MH - Naloxone/pharmacology MH - Narcotic Antagonists/pharmacology MH - Opioid Peptides/antagonists & inhibitors/*metabolism MH - Rats MH - Rats, Wistar MH - Serum Albumin, Bovine/immunology MH - Stress, Physiological/etiology/*immunology MH - Stress, Psychological/immunology EDAT- 2003/12/09 05:00 MHDA- 2004/04/29 05:00 CRDT- 2003/12/09 05:00 PHST- 2003/12/09 05:00 [pubmed] PHST- 2004/04/29 05:00 [medline] PHST- 2003/12/09 05:00 [entrez] AID - T930BCJJNM08M2HK [pii] AID - 10.1080/1025389032000114515 [doi] PST - ppublish SO - Stress. 2003 Dec;6(4):247-58. doi: 10.1080/1025389032000114515.