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Antibody enhanced phagocytosis of lamprey lampetra japonica polymorphonuclear leukocytes against sheep erythrocytes


, : Antibody enhanced phagocytosis of lamprey lampetra japonica polymorphonuclear leukocytes against sheep erythrocytes. Cell & Tissue Research 219(1): 41-51

Centrifugation on Ficoll-Paque of the blood from the Arctic lamprey, L. japonica, yielded a uniform population of leukocytes containing about 90% polymorphonuclear leucocytes (PMN). The PMN showed a significantly enhanced phagocytic activity in vitro against sheep erythrocytes (Es), provided they were opsonized with the specific lamprey antibody (AL) against Es. This enhanced phagocytosis by PMN was more active in 4.degree. C than 15.degree. C, being dependent on Ca2+; the opsonic activity of lamprey antibody was not replaced by bullfrog antibody. By EM, it was found that the PMN possess a well developed Golgi complex, rough ER [endoplasmic reticulum] and highly variable cytoplasmic granules. Observations by both SEM [scanning electron microscopy] and TEM [transmission EM] revealed the formation of prominent pseudopodia, lamellipodia and phagosomes by the PMN during the process of engulfing erythrocytes.

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