Id |
Subject |
Object |
Predicate |
Lexical cue |
T141 |
0-57 |
Sentence |
denotes |
Bats as a reservoir of emerging viral pathogens of humans |
T142 |
58-264 |
Sentence |
denotes |
As the only flying mammals, bats are known as a natural reservoir of various human pathogenic viruses including but not limited to rabies virus, Nipah and Hendra viruses, Ebola virus, and influenza viruses. |
T143 |
265-358 |
Sentence |
denotes |
They can directly transmit rabies virus, Nipah and Hendra viruses, and Ebola virus to humans. |
T144 |
359-483 |
Sentence |
denotes |
Ebola virus might also be transmitted to humans indirectly through fruits contaminated by fruit bats in the African forests. |
T145 |
484-675 |
Sentence |
denotes |
Due to large geographical distribution and great diversity of bat species, a large number of bat CoVs can be created through inter-genus and inter-species transmission and recombination [38]. |
T146 |
676-805 |
Sentence |
denotes |
CoV-infected bats are asymptomatic or have mild symptoms suggesting that CoVs and bats are mutually adapted to high degrees [38]. |
T147 |
806-883 |
Sentence |
denotes |
Particularly, bats are well adapted to CoVs anatomically and physiologically. |
T148 |
884-1039 |
Sentence |
denotes |
First, a high level of reactive oxygen species (ROS) generated from the high metabolic activity may suppress CoV replication in bats to a manageable level. |
T149 |
1040-1162 |
Sentence |
denotes |
Second, degeneration of inflammatory sensors and NF-κB signalling pathway in bats attenuates virus-induced pathology [39]. |
T150 |
1163-1233 |
Sentence |
denotes |
Particularly, NLRP3 inflammasome activation is defective in bats [40]. |
T151 |
1234-1424 |
Sentence |
denotes |
Third, constitutively active type I and III interferon production and innate immune response suppress viral replication through the persistent expression of interferon-stimulated genes [41]. |
T152 |
1425-1532 |
Sentence |
denotes |
It has been speculated that endogenous retroviruses in bats help to sustain interferon stimulation in bats. |
T153 |
1533-1682 |
Sentence |
denotes |
On the other hand, STING signalling is defective in bats and this might lead to selective repression of a subset of interferon-stimulated genes [42]. |
T154 |
1683-1890 |
Sentence |
denotes |
Finally, upregulation of inhibitory natural killer cell receptor NKG2/CD94 and low expression level of major histocompatibility complex class I molecules in bats may hinder natural killer cell activity [43]. |
T155 |
1891-2003 |
Sentence |
denotes |
All these unique features empower bats to survive CoV infection and to co-exist with a large number of bat CoVs. |
T156 |
2004-2133 |
Sentence |
denotes |
Moreover, a high metabolic rate in bats may provide the selection pressure for the generation of highly pathogenic virus strains. |
T157 |
2134-2219 |
Sentence |
denotes |
High ROS level in bats is mutagenic by affecting proofreading of CoV polymerase [38]. |
T158 |
2220-2368 |
Sentence |
denotes |
More pathogenic CoV strains may be generated by recombination, leading to the acquirement of novel proteins or protein features for host adaptation. |
T159 |
2369-2418 |
Sentence |
denotes |
Bats have an average life span of >25 years [38]. |
T160 |
2419-2575 |
Sentence |
denotes |
The long life span and the possible establishment of persistent virus infection in bats increase the chance for cross-species transmission of bat CoVs [38]. |