Id |
Subject |
Object |
Predicate |
Lexical cue |
T705 |
0-4 |
Sentence |
denotes |
7.1. |
T706 |
5-84 |
Sentence |
denotes |
N-Glycosylation Inhibition by Chloroquine (CLQ) and Hydroxychloroquine (CLQ-OH) |
T707 |
85-164 |
Sentence |
denotes |
CLQ and CLQ-OH are under investigation worldwide to treat COVID-19 (Figure 10). |
T708 |
165-309 |
Sentence |
denotes |
CLQ and its derivative CLQ-OH block CoV replication, amplification and spread in in vitro culture via inhibition of ACE2 receptor glycosylation. |
T709 |
310-454 |
Sentence |
denotes |
In HCoVs, interaction of the S glycoprotein with gangliosides initially occur as the first entry step during the replication cycle of the virus. |
T710 |
455-600 |
Sentence |
denotes |
CLQ and CLQ-OH have been alternative drugs for RA and several autoimmune diseases for 70 years, although they are anti-malaria prophylaxis drugs. |
T711 |
601-657 |
Sentence |
denotes |
CLQ-OH is an aminoquinoline with less toxicity than CLQ. |
T712 |
658-754 |
Sentence |
denotes |
CLQ-OH bears an N-hydroxyethyl side chain, which increases its solubility compared to CLQ [141]. |
T713 |
755-857 |
Sentence |
denotes |
CLQ-OH modulates activated immune cells via downregulation of TLR signaling and IL-6 production [142]. |
T714 |
858-946 |
Sentence |
denotes |
Clinical trials are also under consideration for the efficacy and safety of these drugs. |
T715 |
947-1063 |
Sentence |
denotes |
Regarding the action mechanism(s), CLQ and CLQ-OH-mediated inhibition of ACE2 terminal glycosylation was considered. |
T716 |
1064-1250 |
Sentence |
denotes |
In in vitro Vero E6 cells, CLQ significantly inhibits SARS-CoV spread by interfering with ACE2 function, acting at the entry and post-entry steps of SARS-CoV-2 replication and infection. |
T717 |
1251-1357 |
Sentence |
denotes |
The binding affinity of ACE2 to S glycoprotein is simulated to be lowered by treatment with CLQ-OH or CLQ. |
T718 |
1358-1479 |
Sentence |
denotes |
CLQ may modify the binding affinity between ACE2 and S glycoprotein by alterations in ACE2 glycosylation or modification. |
T719 |
1480-1551 |
Sentence |
denotes |
CLQ-OH (EC50 0.72 μM) and CLQ (EC50, 5.47 μM) inhibit SARS-CoV-2 [143]. |
T720 |
1552-1789 |
Sentence |
denotes |
Using computer simulation techniques, CLQ and CLQ-OH have been suggested to recognize the enzymatic active site of the UDP-GlcNAc 2-epimerase, known as an essential enzyme in SA biosynthesis [144], blocking the sialylation of host cells. |
T721 |
1790-1995 |
Sentence |
denotes |
The mechanism underlying the glycosylation inhibition may support the antiviral properties of CLQ and CLQ-OH through interactions of CLQ or CLQ-OH with NDP-saccharide mutases or glycosyltransferases [145]. |
T722 |
1996-2140 |
Sentence |
denotes |
CLQ was reported to inhibit quinone reductase 2 [146], known as a catalytic mimetic or structural neighbor of UDP-GlcNAc 2-epimerases [147,148]. |
T723 |
2141-2332 |
Sentence |
denotes |
If CLQ or CLQ-OH inhibits SA synthesis, the inhibitory properties may support the antiviral activity of CLQ or CLQ-OH against SARS-CoVs because the SARS-CoV receptor ACE2 contains SA species. |
T724 |
2333-2451 |
Sentence |
denotes |
In fact, CLQ exhibits in vitro anti-SARS-CoV-1 activity via defective glycosylation of viral ACE2 in Vero cells [149]. |
T725 |
2452-2645 |
Sentence |
denotes |
In addition. the interference of CLQ or CLQ-OH with SA synthesis may broadly be applicable as an antiviral because the HcoVs or other orthomyxoviruses also utilize SAs as entry molecules [150]. |
T726 |
2646-2708 |
Sentence |
denotes |
However, the detailed mechanisms should be further elucidated. |
T727 |
2709-2804 |
Sentence |
denotes |
The CLQ treatment efficacy in Covid-19 patients has, however, not been conclusively determined. |