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Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Clin+Chim+Acta 2021 ; 519 (ä): 26-31 Nephropedia Template TP
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Clinical relevance of serum alpha-l-fucosidase activity in the SARS-CoV-2 infection #MMPMID33826953
Liang EY; Li GH; Wang WG; Qiu XM; Ke PF; He M; Huang XZ
Clin Chim Acta 2021[Aug]; 519 (ä): 26-31 PMID33826953show ga
BACKGROUND AND AIMS: The reduced fucosylation in the spike glycoprotein of SARS-CoV-2 and the IgG antibody has been observed in COVID-19. However, the clinical relevance of alpha-l-fucosidase, the enzyme for defucosylation has not been discovered. MATERIALS AND METHODS: 585 COVID-19 patients were included to analyze the correlations of alpha-l-fucosidase activity with the nucleic acid test, IgM/IgG, comorbidities, and disease progression. RESULTS: Among the COVID-19 patients, 5.75% were double-negative for nucleic acid and antibodies. All of them had increased alpha-l-fucosidase, while only one had abnormal serum amyloid A (SAA) and C-reactive protein (CRP). The abnormal rate of alpha-l-fucosidase was 81.82% before the presence of IgM, 100% in the presence of IgM, and 66.2% in the presence of IgG. 73.42% of patients with glucometabolic disorders had increased alpha-l-fucosidase activity and had the highest mortality of 6.33%. The increased alpha-l-fucosidase was observed in 55.8% of non-severe cases and 72.9% of severe cases, with an odds ratio of 2.118. The alpha-l-fucosidase mRNA was irrelevant to its serum activity. CONCLUSION: The change in alpha-l-fucosidase activity in COVID-19 preceded the IgM and SAA and showed a preferable relation with glucometabolic disorders, which may be conducive to virus invasion or invoke an immune response against SARS-CoV-2.