The AMeX method. A simplified technique of tissue processing and paraffin embedding with improved preservation of antigens for immunostaining. 1986

Y Sato, and K Mukai, and S Watanabe, and M Goto, and Y Shimosato

A new simplified tissue processing method for immunostaining was devised. Tissues were fixed in acetone at -20 C overnight, then cleared in methyl benzoate and xylene, consecutively, and embedded in ordinary paraffin at 58-60 C. Thin paraffin sections were deparaffinized with xylene, immersed in acetone and then phosphate buffered saline, and immunostained with various monoclonal and conventional antibodies, which have only been used on fresh-frozen or PLP-fixed frozen sections. As with PLP-fixed frozen sections, the following antigens were clearly demonstrated in the tissue sections processed with the present method: T (Leu-1, Leu-2a, Leu-3a, Leu-4, OKT3, OKT4, OKT8), B (B1, B2, Leu-14, IgM, IgD) lymphocyte surface markers and other antigens (Leu-7, OKT6, OKT9, OKM1, OKI1, J5, Ki-1, Ki-67, TdT, oncogene Ha-ras P21). Sections prepared by the present method demonstrated much better histologic and cytologic preservation than possible in frozen sections.

UI MeSH Term Description Entries
D010232 Paraffin A mixture of solid hydrocarbons obtained from petroleum. It has a wide range of uses including as a stiffening agent in ointments, as a lubricant, and as a topical anti-inflammatory. It is also commonly used as an embedding material in histology. Parafilm
D005404 Fixatives Agents employed in the preparation of histologic or pathologic specimens for the purpose of maintaining the existing form and structure of all of the constituent elements. Great numbers of different agents are used; some are also decalcifying and hardening agents. They must quickly kill and coagulate living tissue. Fixative,Pickling Agents,Agents, Pickling
D005629 Frozen Sections Thinly cut sections of frozen tissue specimens prepared with a cryostat or freezing microtome. Frozen Section,Section, Frozen,Sections, Frozen
D006652 Histological Techniques Methods of preparing tissue for examination and study of the origin, structure, function, or pathology. Histologic Technic,Histologic Technics,Histologic Technique,Histologic Techniques,Histological Technics,Technic, Histologic,Technics, Histologic,Technique, Histologic,Techniques, Histologic,Histological Technic,Histological Technique,Technic, Histological,Technics, Histological,Technique, Histological,Techniques, Histological
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000096 Acetone A colorless liquid used as a solvent and an antiseptic. It is one of the ketone bodies produced during ketoacidosis.
D000941 Antigens Substances that are recognized by the immune system and induce an immune reaction. Antigen
D001565 Benzoates Derivatives of BENZOIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain the carboxybenzene structure. Benzoate,Benzoic Acids,Acids, Benzoic
D013194 Staining and Labeling The marking of biological material with a dye or other reagent for the purpose of identifying and quantitating components of tissues, cells or their extracts. Histological Labeling,Staining,Histological Labelings,Labeling and Staining,Labeling, Histological,Labelings, Histological,Stainings
D014992 Xylenes A family of isomeric, colorless aromatic hydrocarbon liquids, that contain the general formula C6H4(CH3)2. They are produced by the destructive distillation of coal or by the catalytic reforming of petroleum naphthenic fractions. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed) Dimethylbenzenes,Xylene

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