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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Signal+Transduct+Target+Ther 2020 ; 5 (1): 186 Nephropedia Template TP
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COVID-19-activated SREBP2 disturbs cholesterol biosynthesis and leads to cytokine storm #MMPMID32883951
Lee W; Ahn JH; Park HH; Kim HN; Kim H; Yoo Y; Shin H; Hong KS; Jang JG; Park CG; Choi EY; Bae JS; Seo YK
Signal Transduct Target Ther 2020[Sep]; 5 (1): 186 PMID32883951show ga
Sterol regulatory element binding protein-2 (SREBP-2) is activated by cytokines or pathogen, such as virus or bacteria, but its association with diminished cholesterol levels in COVID-19 patients is unknown. Here, we evaluated SREBP-2 activation in peripheral blood mononuclear cells of COVID-19 patients and verified the function of SREBP-2 in COVID-19. Intriguingly, we report the first observation of SREBP-2 C-terminal fragment in COVID-19 patients' blood and propose SREBP-2 C-terminal fragment as an indicator for determining severity. We confirmed that SREBP-2-induced cholesterol biosynthesis was suppressed by Sestrin-1 and PCSK9 expression, while the SREBP-2-induced inflammatory responses was upregulated in COVID-19 ICU patients. Using an infectious disease mouse model, inhibitors of SREBP-2 and NF-kappaB suppressed cytokine storms caused by viral infection and prevented pulmonary damages. These results collectively suggest that SREBP-2 can serve as an indicator for severity diagnosis and therapeutic target for preventing cytokine storm and lung damage in severe COVID-19 patients.