Journal
JOURNAL OF NEUROINFLAMMATION
Volume 18, Issue 1, Pages -Publisher
BMC
DOI: 10.1186/s12974-021-02130-1
Keywords
Chronic inflammatory demyelinating neuropathy; corneal confocal microscopy; Diabetes mellitus
Categories
Funding
- Projekt DEAL
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The study showed that an increase in dendritic cell density can identify individuals with CIDP. Corneal nerve fiber density, length, and branch density were equally reduced in participants with CIDP, diabetic neuropathy, and CIDP with diabetes. Therefore, corneal confocal microscopy may be useful in differentiating inflammatory from non-inflammatory diabetic neuropathy.
Background Immune-mediated neuropathies, such as chronic inflammatory demyelinating polyneuropathy (CIDP) are treatable neuropathies. Among individuals with diabetic neuropathy, it remains a challenge to identify those individuals who develop CIDP. Corneal confocal microscopy (CCM) has been shown to detect corneal nerve fiber loss and cellular infiltrates in the sub-basal layer of the cornea. The objective of the study was to determine whether CCM can distinguish diabetic neuropathy from CIDP and whether CCM can detect CIDP in persons with coexisting diabetes. Methods In this multicenter, case-control study, participants with CIDP (n = 55) with (n = 10) and without (n = 45) diabetes; participants with diabetes (n = 58) with (n = 28) and without (n = 30) diabetic neuropathy, and healthy controls (n = 58) underwent CCM. Corneal nerve fiber density (CNFD), corneal nerve fiber length (CNFL), corneal nerve branch density (CNBD), and dendritic and non-dendritic cell density, with or without nerve fiber contact were quantified. Results Dendritic cell density in proximity to corneal nerve fibers was significantly higher in participants with CIDP with and without diabetes compared to participants with diabetic neuropathy and controls. CNFD, CNFL, and CNBD were equally reduced in participants with CIDP, diabetic neuropathy, and CIDP with diabetes. Conclusions An increase in dendritic cell density identifies persons with CIDP. CCM may, therefore, be useful to differentiate inflammatory from non-inflammatory diabetic neuropathy.
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