Abstract

We have produced monoclonal antibodies (mAb’s) against antigens of the fresh-water planarian Dugesia (G.) tigrina (Girard) using standard protocols. Labeling these mAb’s with PAP (peroxidaseantiperoxidase) and indirect-immunofluorescence methods, we then determined the distribution of their antigens in the planarian. Out of 112 mAb’s that showed some specificity for restricted parts of the planarian, 71 were found to be cell- or tissue-specific - among them 36 for parenchymal cells, 7 for muscle cells, 11 for epidermal cells, 8 for gastrodermis, and 7 to basement membrane. Another 41 showed different, but overlapping, regional specificities, namely to pharynx and parenchyma. So far, we have been unable to isolate specific mAb’s against undifferentiated cells (neoblasts). These mAb’s should be important tools in study of tissue and cell morphology, regeneration, and growth and degrowth.

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