Id |
Subject |
Object |
Predicate |
Lexical cue |
T128 |
0-74 |
Sentence |
denotes |
Inhibition of Host Cell Biosynthetic Pathways and Modulation of Cell Death |
T129 |
75-179 |
Sentence |
denotes |
Both SARS-CoV and SARS-CoV-2 have evolved multiple inhibitory mechanisms to evade host cell recognition. |
T130 |
180-339 |
Sentence |
denotes |
Inhibition of host transcriptional and translational machinery prevents the biosynthesis of protective IFNs and delays early activation of host cell apoptosis. |
T131 |
340-444 |
Sentence |
denotes |
Nsp1 of SARS-CoV inhibit the loading of ribosomal 40s subunit and prevent host cell protein translation. |
T132 |
445-589 |
Sentence |
denotes |
Further, Nsp1 specifically degrade host cell RNA while sparing the viral RNA (Huang et al., 2011; Tanaka et al., 2012; Lokugamage et al., 2015). |
T133 |
590-693 |
Sentence |
denotes |
N protein of SARS-CoV-2 also interacts with the host biosynthetic protein La-related protein 1 (LARP1). |
T134 |
694-846 |
Sentence |
denotes |
This interaction may serve as the necessary signal to shut down the host cell protein synthesis for the propagation of SARS-CoV-2 (Gordon et al., 2020). |
T135 |
847-1069 |
Sentence |
denotes |
Papain-like protease of SARS-CoV directly interacts with p53 and induce its degradation, which may thus interfere with translation and delay early apoptosis of the infected cells (Yuan et al., 2015; Ma-Lauer et al., 2016). |
T136 |
1070-1236 |
Sentence |
denotes |
SARS-CoV S protein also interacts with the translation initiation factor eIF3f and inhibit host cell translation by preventing its nuclear import (Xiao et al., 2008). |
T137 |
1237-1476 |
Sentence |
denotes |
Studies from other respiratory viruses have shown that cells which activate early apoptosis prevent further spread of the viruses, whereas viruses that successfully inhibit this pathway exhibit strong infectivity (Orzalli and Kagan, 2017). |
T138 |
1477-1668 |
Sentence |
denotes |
Cytomegaloviruses (CMVs) distinctly rely on this mechanism to successfully replicate within the host cell by inhibiting apoptosis-modulatory proteins such as Bax and Bcl-2 (Çam et al., 2010). |
T139 |
1669-1895 |
Sentence |
denotes |
However, whether SARS-CoV or SARS-CoV-2 are also directly involved in inhibiting early apoptosis remains to be tested, but it is evident that these viruses induce host cell death after successful propagation and dissemination. |
T140 |
1896-2022 |
Sentence |
denotes |
SARS-CoV Nsp7a was shown to interact with prosurvival protein Bcl-X and induce apoptosis in cells in vitro (Tan et al., 2007). |
T141 |
2023-2156 |
Sentence |
denotes |
Similarly, ORF3a leads to fragmentation of the Golgi apparatus, and induction of apoptosis (Waye et al., 2005; Freundt et al., 2010). |
T142 |
2157-2305 |
Sentence |
denotes |
Besides this, ORF3a also implicates necroptotic cell death by interacting with and activating the main necroptosis protein RIPK3 (Yue et al., 2018). |
T143 |
2306-2406 |
Sentence |
denotes |
Owing to its role in cell death pathways, the ORF3a of SARS-CoV-2 was also explored in this context. |
T144 |
2407-2529 |
Sentence |
denotes |
This protein similarly induced apoptosis in HEK293 cells by activating the caspase 8-dependent pathway (Ren et al., 2020). |
T145 |
2530-2763 |
Sentence |
denotes |
Interestingly, the results, that ORF3a of SARS-CoV-2 induces relatively lower apoptosis in several cell lines as compared to SARS-CoV, suggesting that this mechanism could provide an early advantage for the propagation of SARS-CoV-2. |
T146 |
2764-2984 |
Sentence |
denotes |
Further, the proteome map of SARS-CoV-2 predicted interaction of Nsp12 with RIPK1, suggesting that this viral protein may also implicate in regulating host cell apoptotic and necroptotic cell death (Gordon et al., 2020). |
T147 |
2985-3254 |
Sentence |
denotes |
However, a study on 25 cell lines in culture showed SARS-CoV-2 exhibiting cytopathic effect on only two cells, indicating that the differences could exist between these two related viruses in their property to interfere with host cell death pathways (Chu et al., 2020). |
T148 |
3255-3444 |
Sentence |
denotes |
Thus, more comprehensive studies are needed to provide better molecular insights by which SARS-CoV-2 modulates host cell death pathways, which may also open new opportunities for treatment. |
T149 |
3445-3713 |
Sentence |
denotes |
Based on these early observations, it is becoming evident that SARS-CoV-2 interferes with host NAS, IFN, biosynthetic, and cell death pathways to prevent early immune response and thus contribute to the underlying immunopathogenesis, as will be discussed subsequently. |
T150 |
3714-3911 |
Sentence |
denotes |
To make these details simple, here we compiled the role of various SARS-CoV and SARS-CoV-2 proteins and their host cell interacting proteins and presented in the Table form (Supplementary Table 1). |