Abstract
After diagnosing amyloid by the Congo red procedure (see Chap. 13), identifying the chemical nature of the amyloidotic protein causing the disease is mandatory for therapeutic considerations. Here is illustrated how immunohistochemical typing of amyloid can be achieved on formalin-fixed tissue sections using a panel of amyloid antibodies which were produced for this purpose. These antibodies and the histological expert evaluation are the key for a successful amyloid typing while the various pitfalls are being avoided. The single strong, consistent, and therefore diagnostic reaction has to be distinguished from the other weaker, inconsistent, and unspecific reactions since amyloid deposits contain various substances. The prevalence of the amyloid types among 626 samples submitted for typing is presented. Other laboratories have achieved similar results with these antibodies since this typing is easy, fast, and affordable. Finally, mass spectrometry has confirmed the high sensitivity and precision of this routine method for classifying amyloid.
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Notes
- 1.
AIg is proposed here as a practical acronym for the combination of AL and AH.
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Acknowledgments
This work was only possible as a result of contributions by many colleagues over several decades. Full acknowledgment of some of these contributions can be found in a forthcoming in-depth review (work in progress). Here, I would like to thank Prof. Dr. R. Huber, director emeritus of the Max-Planck-Institute of Biochemistry in Martinsried, who provided laboratory space, and supported some of the technicians and coworkers involved in the laboratory work. They include: Mrs. A. Rail, Mrs. A. Kerling, Mrs. R. Oos, Mrs A. Meinel and Dr. N. Wiegel. For secretarial work, I thank Mrs. A. Feix, Martinsried, Germany, and for the artwork Ms A. K. M. Linke, Essen, Germany.
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Linke, R.P. (2012). Routine Use of Amyloid Typing on Formalin-Fixed Paraffin Sections from 626 Patients by Immunohistochemistry. In: Picken MD, PhD, FASN, M., Dogan, M.D., Ph.D., A., Herrera, M.D., G. (eds) Amyloid and Related Disorders. Current Clinical Pathology. Humana Press. https://doi.org/10.1007/978-1-60761-389-3_17
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