PMID- 1967066 OWN - NLM STAT- MEDLINE DCOM- 19921026 LR - 20141120 IS - 0141-2760 (Print) IS - 0141-2760 (Linking) VI - 33 IP - 2 DP - 1990 Oct TI - Triggering effects of opsonized-IgG antibody on the superoxide release in the phagosome and phagosome-lysosome fusion by pulmonary alveolar macrophages in rabbits. PG - 55-9 AB - We studied the triggering effects of opsonized-IgG antibody on the superoxide (O2-) release and phagosome-lysosome fusion in the phagosome of pulmonary alveolar macrophages (PAM). Both were histochemically assayed in the same cell to enable simultaneous observation, using the qualitative superoxide dismutase (SOD)-inhibitable nitroblue tetrazolium (NBT) reduction test and the acridine orange (AO) method. When PAM from normal rabbit lungs were made to phagocytize the IgG-treated yeasts, the cells showed the enhanced release of O2- which acted directly on the antibody-coated yeasts as an oxidant, and the enhanced phagosome-lysosome fusion that was inhibited by SOD and was closely related to the enhanced release of O2- in the phagosomes. In contrast, neither enhanced O2- release nor phagosome-lysosome fusion was observed in the PAM which phagocytized saline-treated yeasts. These results may suggest that the opsonized-IgG antibody enhances the O2- release in the phagosome, resulting in the enhanced phagosome-lysosome fusion. FAU - Suga, M AU - Suga M AD - Kumamoto Rosai Hospital, Japan. FAU - Ando, M AU - Ando M FAU - Tanaka, F AU - Tanaka F FAU - Araki, S AU - Araki S LA - eng PT - Journal Article PL - Scotland TA - J Clin Lab Immunol JT - Journal of clinical & laboratory immunology JID - 7808987 RN - 0 (Immunoglobulin G) RN - 0 (Opsonin Proteins) RN - 11062-77-4 (Superoxides) SB - IM MH - Animals MH - *Immunoglobulin G MH - In Vitro Techniques MH - Macrophages, Alveolar/*immunology/*metabolism MH - Membrane Fusion/immunology MH - Opsonin Proteins MH - Phagocytosis MH - Phagosomes/immunology/metabolism MH - Rabbits MH - Superoxides/*metabolism MH - Trichosporon/immunology EDAT- 1990/10/01 00:00 MHDA- 1990/10/01 00:01 CRDT- 1990/10/01 00:00 PHST- 1990/10/01 00:00 [pubmed] PHST- 1990/10/01 00:01 [medline] PHST- 1990/10/01 00:00 [entrez] PST - ppublish SO - J Clin Lab Immunol. 1990 Oct;33(2):55-9.