Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple Sclerosis
Multiple sclerosis (MS) is an inflammatory disease of the central nervous system (CNS) that leads to the death of neurons and oligodendrocytes, which cannot be measured in living subjects. Physiological cellular death, otherwise known as apoptosis, progresses through a series of stages which culmina...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-11-01
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| Series: | Frontiers in Neurology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fneur.2019.01241/full |
| _version_ | 1811262905377619968 |
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| author | Ruturaj Masvekar Jordan Mizrahi John Park Peter R. Williamson Bibiana Bielekova |
| author_facet | Ruturaj Masvekar Jordan Mizrahi John Park Peter R. Williamson Bibiana Bielekova |
| author_sort | Ruturaj Masvekar |
| collection | DOAJ |
| description | Multiple sclerosis (MS) is an inflammatory disease of the central nervous system (CNS) that leads to the death of neurons and oligodendrocytes, which cannot be measured in living subjects. Physiological cellular death, otherwise known as apoptosis, progresses through a series of stages which culminates in the discharge of cellular contents into vesicles known as apoptotic bodies (ABs) or apoptosomes. These ABs can be detected in bodily fluids as Annexin-V-positive vesicles of 0.5–4.0 μm in size. In addition, the origin of these ABs might be detected by staining for cell-specific surface markers. Thus, we investigated whether quantifications of the total and CNS cell-specific ABs in the cerebrospinal fluid (CSF) of patients provided any clinical value in MS. Extracellular vesicles, from CSF of 64 prospectively-acquired subjects, were collected in a blinded fashion using ultra-centrifugation. ABs were detected by flow cytometry using bead-enabled size-gating and Annexin-V-staining. The origin of these ABs was further classified by staining the vesicles for cell-specific surface markers. Upon unblinding, we evaluated the differences between diagnostic categories and correlations with clinical measures. There were no statistically significant differences in the numbers of total or any cell-specific ABs across different disease diagnostic subgroups and no significant correlations with any of the tested clinical measures of CNS tissue destruction, disability, MS activity, and severity (i.e., rates of disability accumulation). Overlap of cell surface markers suggests inability to reliably determine origin of ABs using antibody-based flow cytometry. These negative data suggest that CNS cells in MS either die by non-apoptotic mechanisms or die in frequencies indistinguishable by current assays from apoptosis of other cells, such as immune cells performing immunosurveillance in healthy conditions. |
| first_indexed | 2024-04-12T19:33:57Z |
| format | Article |
| id | doaj.art-3b3fdfc146b046a8b051aafe411f2bc0 |
| institution | Directory Open Access Journal |
| issn | 1664-2295 |
| language | English |
| last_indexed | 2024-04-12T19:33:57Z |
| publishDate | 2019-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neurology |
| spelling | doaj.art-3b3fdfc146b046a8b051aafe411f2bc02022-12-22T03:19:15ZengFrontiers Media S.A.Frontiers in Neurology1664-22952019-11-011010.3389/fneur.2019.01241496438Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple SclerosisRuturaj MasvekarJordan MizrahiJohn ParkPeter R. WilliamsonBibiana BielekovaMultiple sclerosis (MS) is an inflammatory disease of the central nervous system (CNS) that leads to the death of neurons and oligodendrocytes, which cannot be measured in living subjects. Physiological cellular death, otherwise known as apoptosis, progresses through a series of stages which culminates in the discharge of cellular contents into vesicles known as apoptotic bodies (ABs) or apoptosomes. These ABs can be detected in bodily fluids as Annexin-V-positive vesicles of 0.5–4.0 μm in size. In addition, the origin of these ABs might be detected by staining for cell-specific surface markers. Thus, we investigated whether quantifications of the total and CNS cell-specific ABs in the cerebrospinal fluid (CSF) of patients provided any clinical value in MS. Extracellular vesicles, from CSF of 64 prospectively-acquired subjects, were collected in a blinded fashion using ultra-centrifugation. ABs were detected by flow cytometry using bead-enabled size-gating and Annexin-V-staining. The origin of these ABs was further classified by staining the vesicles for cell-specific surface markers. Upon unblinding, we evaluated the differences between diagnostic categories and correlations with clinical measures. There were no statistically significant differences in the numbers of total or any cell-specific ABs across different disease diagnostic subgroups and no significant correlations with any of the tested clinical measures of CNS tissue destruction, disability, MS activity, and severity (i.e., rates of disability accumulation). Overlap of cell surface markers suggests inability to reliably determine origin of ABs using antibody-based flow cytometry. These negative data suggest that CNS cells in MS either die by non-apoptotic mechanisms or die in frequencies indistinguishable by current assays from apoptosis of other cells, such as immune cells performing immunosurveillance in healthy conditions.https://www.frontiersin.org/article/10.3389/fneur.2019.01241/fullmultiple sclerosiscerebrospinal fluidapoptotic bodiesclinical outcomesflow cytometrycell surface markers |
| spellingShingle | Ruturaj Masvekar Jordan Mizrahi John Park Peter R. Williamson Bibiana Bielekova Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple Sclerosis Frontiers in Neurology multiple sclerosis cerebrospinal fluid apoptotic bodies clinical outcomes flow cytometry cell surface markers |
| title | Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple Sclerosis |
| title_full | Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple Sclerosis |
| title_fullStr | Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple Sclerosis |
| title_full_unstemmed | Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple Sclerosis |
| title_short | Quantifications of CSF Apoptotic Bodies Do Not Provide Clinical Value in Multiple Sclerosis |
| title_sort | quantifications of csf apoptotic bodies do not provide clinical value in multiple sclerosis |
| topic | multiple sclerosis cerebrospinal fluid apoptotic bodies clinical outcomes flow cytometry cell surface markers |
| url | https://www.frontiersin.org/article/10.3389/fneur.2019.01241/full |
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