The ability of insect blood cells to ingest all kinds of synthetic particles and also a wide range of microorganisms in a very short time after injection has up to now been regarded as a phagocytic function without any humoral mediators. In a phagocytosis model with latex beads and nonhagocytosable cells of Bacillus thuringiensis subtoxicus, we are able to demonstrate the existence of lymphokine-like factors, which intervene in cellular defence reactions of insect. The following results were obtained: 1.
View Article and Find Full Text PDFIn isolated bovine coronary arteries after preceding calcium depletion by EGTA, lanthanum causes a reversible contracutre that is independent of the presence of extracellular calcium. Also, the contracture appears to be widely independent of intracellular calcium. In the superprecipitation reaction of isolated actomyosin from bovine carotis, lanthanum ions can be substituted for calcium ions.
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