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Cerebrospinal fluid and serum interleukins 6 and 8 during the acute and recovery phase in COVID‐19 neuropathy patients

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This case series describes three patients affected by severe acute respiratory syndrome coronavirus 2, who developed polyradiculoneuritis as a probable neurological complication of coronavirus disease 2019 (COVID‐19). A diagnosis of… Click to show full abstract

This case series describes three patients affected by severe acute respiratory syndrome coronavirus 2, who developed polyradiculoneuritis as a probable neurological complication of coronavirus disease 2019 (COVID‐19). A diagnosis of Guillain Barré syndrome was made on the basis of clinical symptoms, cerebrospinal fluid analysis, and electroneurography. In all of them, the therapeutic approach included the administration of intravenous immunoglobulin (0.4 gr/kg for 5 days), which resulted in the improvement of neurological symptoms. Clinical neurophysiology revealed the presence of conduction block, absence of F waves, and in two cases, a significant decrease in amplitude of compound motor action potential cMAP. Due to the potential role of inflammation on symptoms development and prognosis, interleukin‐6 (IL‐6) and IL−8 levels were measured in serum and cerebrospinal fluid during the acute phase, while only serum was tested after recovery. Both IL‐6 and IL‐8 were found increased during the acute phase, both in the serum and cerebrospinal fluid, whereas 4 months after admission (at complete recovery), only IL‐8 remained elevated in the serum. These results confirm the inflammatory response that might be linked to peripheral nervous system complications and encourage the use of IL‐6 and IL‐8 as prognostic biomarkers in COVID‐19.

Keywords: recovery; phase; fluid serum; covid; cerebrospinal fluid

Journal Title: Journal of Medical Virology
Year Published: 2021

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