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Enhancement of structural preservation and immunocytochemical staining in low temperature embedded pancreatic tissue
J Roth, M Bendayan, E Carlemalm, W Villiger and M Garavito
The recently developed low temperature embedding procedure with the resin Lowicryl K4M (Carlemalm E, Garavito M, Villiger W: Proc 7th Eur Cong Electron Microsc, 1980, p 656; Garavito M, Carlemalm E, Villiger W: Proc 7th Eur Cong Electron Microsc, 1980, p 658) was tested for its suitability for embedding of glutaraldehyde-fixed rat pancreatic tissue and for postembedding staining of thin sections with the protein A-gold (pAg) technique (Roth J, Bendayan M, Orci L: J Histochem Cytochem 26:1074, 1978) for amylase. Compared to conventional Epon embedding of glutaraldehyde fixed tissue, the low temperature embedding method with Lowicryl K4M resulted in a superior preservation of the general cellular fine structure, particularly in the Golgi apparatus. For low temperature embedded tissue, the quantitative evaluation of the immunocytochemical labeling for amylase showed a more specific staining of the rough endoplasmic reticulum, the Golgi apparatus, and the zymogen granules. This was due to a significant lowering of the background staining over all cellular organelles. The use of Lowicryl K4M at low temperature, due to the superior preservation, yields improved resolution and specificity in immunocytochemical postembedding staining.
Volume 29,
Issue 5,
pp. 663-671,
05/01/1981
Copyright © 1981 by The Histochemical Society
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