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| Item Type: | Preprint |
|---|---|
| Title: | SIGLEC1 (CD169): a marker of active neuroinflammation in the brain but not in the blood of MS patients |
| Creators Name: | Ostendorf, L., Dittert, P., Biesen, R., Duchow, A., Stiglbauer, V., Ruprecht, K., Seelow, D., Niesner, R.A., Hauser, A.E., Paul, F. and Radbruch, H. |
| Abstract: | OBJECTIVE: We aimed to evaluate SIGLEC1 (CD169) as a biomarker in Multiple Sclerosis (MS) and Neuromyelitis optica spectrum disorder (NMOSD) and to evaluate the specificity of SIGLEC1+ myeloid cells for demyelinating diseases. METHODS: We performed flow cytometry-based measurements of SIGLEC1 expression on monocytes in 86 MS patients, 41 NMOSD patients and 31 healthy controls. Additionally, we histologically evaluated the presence of SIGLEC1+ myeloid cells in acute and chronic MS brain lesions as well as other neurological diseases. RESULTS: We found elevated SIGLEC1 expression in 16/86 (18.6%) MS patients and 4/41 (9.8%) NMOSD patients. Almost all MS patients with high SIGLEC1 levels received exogenous interferon beta as an immunomodulatory treatment and only a small fraction of MS patients without interferon treatment had increased SIGLEC1 expression. SIGLEC1+ myeloid cells were abundantly present in active MS lesions as well as in a range of acute infectious and malignant diseases of the central nervous system, but not chronic MS lesions. CONCLUSION: In our cohort, SIGLEC1 expression on monocytes was – apart from those patients receiving interferon treatment – not significantly increased in patients with MS and NMOSD, nor were levels associated with more severe disease. The presence of SIGLEC1+ myeloid cells in brain lesions could be used to investigate the activity in an inflammatory CNS lesion. |
| Source: | medRxiv |
| Publisher: | Cold Spring Harbor Laboratory Press |
| Article Number: | 2020.12.18.20248500 |
| Date: | 22 December 2020 |
| Official Publication: | https://doi.org/10.1101/2020.12.18.20248500 |
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