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Nagai, A. et al.

Nagai, Murakawa, Terashima, Shimode, Umegae, Takeuchi, Kobayashi,

Cystatin C and cathepsin B in CSF from patients with inflammatory neurologic diseases.

BACKGROUND: In CSF, proteolytic enzymes are believed to have crucial roles in the initiation and progression of inflammatory neurologic diseases (IND). Cystatin C, a major cysteine protease inhibitor in CSF, is tightly bound to cathepsin B and H. OBJECTIVE: To determine if cystatin C is involved in the disease process of IND, the authors measured the cystatin C concentration by ELISA method and cathepsin B and H activities in the CSF of patients with acute IND. METHODS: Cystatin C concentration and cathepsin B and H activities were measured in CSF samples taken from patients during the acute phase of their disease. Subjects studied were 8 patients with Guillain-BarrÃ© syndrome (GBS), 5 with chronic inflammatory demyelinating polyneuropathy (CIDP), 12 with MS, 16 with aseptic meningitis, 15 with neurodegenerative diseases as disease controls, and 35 healthy controls. RESULTS: A significant decrease in CSF cystatin C level was seen in the patients with GBS, CIDP, and MS compared to the control subjects. High cathepsin B activity, but not cathepsin H activity, was also observed in the patients with GBS, CIDP, and MS. CONCLUSION: Cystatin C levels in CSF measured by ELISA may help the physician recognize GBS, CIDP, and MS. Decreased levels of cystatin C may be related to the high levels of cathepsin B activity seen in the CSF of patients with GBS, CIDP, and MS.[1]

References

Cystatin C and cathepsin B in CSF from patients with inflammatory neurologic diseases. Nagai, A., Murakawa, Y., Terashima, M., Shimode, K., Umegae, N., Takeuchi, H., Kobayashi, S. Neurology (2000) [Pubmed]

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