Monoclonal antibody against rat renal cell tumor-associated antigen as a new tool for the analysis of renal tumorigenesis

Japanese Journal of Cancer Research : Gann
N KonishiY Hiasa

Abstract

A monoclonal antibody, NR-2 MAb, against one of the rat renal cell tumor-associated antigens was developed. NR-2 MAb belonged to IgM class and recognized a polypeptide of 81,000 daltons designated as NR-2 antigen, which is of non-glycoprotein nature with a pI of 4.6. NR-2 MAb was employed to probe the histogenesis of renal cell tumors in rats treated with N-ethyl-N-hydroxyethylnitrosamine followed by trisodium nitrilotriacetate monohydrate. Immunohistochemical analysis indicated that NR-2 antigen was expressed in simple hyperplasia, adenomatous hyperplasia and renal cell tumors. Both clear cells and basophilic cells of the simple hyperplasia showed equally strong positive reactions with NR-2 MAb, whereas the vacuolated epithelium was negative. Furthermore, the proximal tubules in nontumorous areas also expressed NR-2 antigen, suggesting that the hyperplastic lesions which eventually lead to renal cell tumors may derive from epithelia of proximal tubules and not directly from vacuolated epithelium. Such NR-2 antigen-positive epithelia of proximal tubules seem to be initiated cells. NR-2 MAb also cross-reacted with preneoplastic liver lesions.

References

Apr 1, 1981·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·S M HsuH Fanger
Aug 1, 1982·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·J A Merski
Aug 1, 1982·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·C L Alden, R L Kanerva
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Dec 1, 1982·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·C L Alden, R L Kanerva

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