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- Title
Kallikrein 6 Regulates Early CNS Demyelination in a Viral Model of Multiple Sclerosis.
- Authors
Scarisbrick, Isobel A.; Yoon, Hyesook; Panos, Michael; Larson, Nadya; Blaber, Sachiko I.; Blaber, Michael; Rodriguez, Moses
- Abstract
Kallikrein 6 (Klk6) is a secreted serine protease that is elevated in active multiple sclerosis lesions and patient sera. To further evaluate the involvement of Klk6 in chronic progressive demyelinating disease, we determined its expression in the brain and spinal cord of SJL mice infected with Theiler's murine encephalomyelitis virus (TMEV) and assessed the effects of Klk6-neutralizing antibodies on disease progression. Klk6 RNA expression was elevated in the brain and spinal cord by 7 days postinfection (dpi). Thereafter, Klk6 expression persisted primarily in the spinal cord reaching a peak of fivefold over controls at mid-chronic stages (60 dpi-120 dpi). Significant elevations in Klk6 RNA were also induced in splenocytes stimulated with viral capsid proteins in vitro and in activated human acute monocytic leukemia cells. Klk6-neutralizing antibodies reduced TMEV-driven brain and spinal cord pathology and delayed-type hypersensitivity (DTH) responses when examined at early chronic time points (40 dpi). Reductions in spinal cord pathology included a decrease in activated monocytes/microglia and reductions in the loss of myelin basic protein (MBP). By 180 dpi, pathology scores no longer differed between groups. These findings point to regulatory activities for Klk6 in the development and progression of central nervous system (CNS) inflammation and demyelination that can be effectively targeted through the early chronic stages with neutralizing antibody.
- Subjects
KALLIKREIN; DEMYELINATION; CENTRAL nervous system diseases; ANIMAL models of multiple sclerosis; POLIOVIRUS; THEILER'S murine encephalomyelitis virus; SERINE proteinases; LABORATORY mice
- Publication
Brain Pathology, 2012, Vol 22, Issue 5, p709
- ISSN
1015-6305
- Publication type
Article
- DOI
10.1111/j.1750-3639.2012.00577.x