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NEUROLOGY 1988;38:1423
© 1988 American Academy of Neurology

CSF somatostatin is elevated in patients with postzoster neuralgia

J. Unger, MD, A. Weindl, MD, PhD, G. Ochs, MD and A. Struppler, MD

Department of Neurology, Technical University of Munich, Munich, Federal Republic of Germany.

We evaluated the concentration of the neuropeptide somatostatin (SOM) in the CSF of patients with several neurologic diseases. Since SOM is localized in high concentrations in primary sensory pathways, such as the dorsal root ganglia and dorsal horn of the spinal cord, it might be involved in conditions of chronic pain due to functional alterations of nociceptive neurons, such as postinfectious zoster neuralgia. Our study indicated a marked elevation of SOM in patients suffering from postzoster neuralgia compared with controls. Comparison with other neurologic diseases revealed decreased CSF SOM levels in Parkinson's and Alzheimer's disease, unchanged values in patients with amyotrophic lateral sclerosis, and increased concentrations in patients with brain tumors. In neurodegenerative disorders, SOM levels in CSF seemed to reflect the anatomic distribution as well as a reduction or preservation of the peptide in certain brain areas affected by the disease process. In postzoster patients, postinfectious degeneration of dorsal root ganglia cells might cause deafferentation of dorsal horn neurons and activation of SOM-containing systems with increased release either locally from neurons in the dorsal horn of the spinal cord or from descending fiber projections. The results suggested that SOM may take part in the modulation of nociceptive responses.

Address correspondence and reprint requests to Dr. Weindl, Department of Neurology, Technical University of Munich, Möhlstrasse 28, D8000 Munich 80, Federal Republic of Germany.

Supported by DFG grant We 608/8–1.

Received November 9, 1987. Accepted for publication in final form January 27, 1988.






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