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

Autor(es): Nagai A,Murakawa Y,Terashima M,Shimode K,Umegae N,Takeuchi H,Kobayashi S

Resumo: 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. 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. 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-Barré 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. 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. 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.

Imprenta: Neurology, v. 55, n. 12, p. 1828-1832, 2000

Identificador do objeto digital: 10.1212/WNL.55.12.1828

Descritores: Guillain-Barre Syndrome - Proteins ; Guillain-Barre Syndrome - Cytokines

Data de publicação: 2000