Rarefaction of the Peripheral Nerve Network in Diabetic Patients Is Associated With a Pronounced Reduction of Terminal Schwann Cells
- Christina M. Reinisch, MD1,
- Hannes Traxler, MD2,
- Stefanie Piringer2,
- Stefan Tangl, MS34,
- Alexander Nader, MD5 and
- Erwin Tschachler, MD16
- 1Department of Dermatology, Medical University of Vienna, Vienna, Austria
- 2Center of Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
- 3Department of Oral Surgery, Bernhard Gottlieb University Dental Clinic, Medical University of Vienna, Vienna, Austria
- 4Austrian Cluster for Tissue Regeneration, Vienna, Austria
- 5Institute of Pathology, Hanuschkrankenhaus, Vienna, Austria
- 6Centre de Recherches et d'Investigations Épidermiques et Sensorielles (CE.R.I.E.S.), Neuilly, France
- Corresponding author: Erwin Tschachler, MD, Department of Dermatology, University of Vienna Medical School, Waehringer Gürtel 18-20, A-1090 Vienna, Austria. E-mail: tschachler{at}meduniwien.ac.at
Abstract
OBJECTIVE—Peripheral neuropathy is the most frequent neurological complication in diabetic patients. The diagnosis is established by both clinical neurological examination and demonstration of reduced epidermal nerve fibers in skin biopsies (1). Whereas the decrease of free nerve endings has been extensively studied in diabetic patients (2,3), no data are available on possible changes of terminal Schwann cells. Besides their role as scaffold for peripheral nerves, they also play an important role in supporting survival and function of peripheral nerves (4).
RESEARCH DESIGN AND METHODS—We analyzed the subepidermal nerve plexus in dermal sheet preparations of deceased diabetic and nondiabetic patients by immunostaining for detection of the neural cell adhesion molecule and quantification of the subepidermal nerve plexus.
RESULTS AND CONCLUSIONS—The subepidermal nerve plexus, comprising nerve fibers and ensheathing Schwann cells, was significantly reduced in diabetic patients. Whether the reduction in terminal Schwann cells is cause or consequence of the loss of peripheral nerve fibers remains to be investigated.
Footnotes
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Published ahead of print at http://care.diabetesjournals.org on 10 March 2008. DOI: 10.2337/dc07-1832.
C.M.R. and H.T. contributed equally to this study.
The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked “advertisement” in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.
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- Accepted February 28, 2008.
- Received September 18, 2007.
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