Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
0-106 |
Sentence |
denotes |
Vaccine candidates derived from a novel infectious cDNA clone of an American genotype dengue virus type 2. |
T2 |
107-118 |
Sentence |
denotes |
BACKGROUND: |
T3 |
119-276 |
Sentence |
denotes |
A dengue virus type 2 (DEN-2 Tonga/74) isolated from a 1974 epidemic was characterized by mild illness and belongs to the American genotype of DEN-2 viruses. |
T4 |
277-447 |
Sentence |
denotes |
To prepare a vaccine candidate, a previously described 30 nucleotide deletion (Delta30) in the 3' untranslated region of DEN-4 has been engineered into the DEN-2 isolate. |
T5 |
448-456 |
Sentence |
denotes |
METHODS: |
T6 |
457-581 |
Sentence |
denotes |
A full-length cDNA clone was generated from the DEN-2 virus and used to produce recombinant DEN-2 (rDEN-2) and rDEN2Delta30. |
T7 |
582-729 |
Sentence |
denotes |
Viruses were evaluated for replication in SCID mice transplanted with human hepatoma cells (SCID-HuH-7 mice), in mosquitoes, and in rhesus monkeys. |
T8 |
730-823 |
Sentence |
denotes |
Neutralizing antibody induction and protective efficacy were also assessed in rhesus monkeys. |
T9 |
824-832 |
Sentence |
denotes |
RESULTS: |
T10 |
833-945 |
Sentence |
denotes |
The rDEN2Delta30 virus was ten-fold reduced in replication in SCID-HuH-7 mice when compared to the parent virus. |
T11 |
946-1058 |
Sentence |
denotes |
The rDEN-2 viruses were not infectious for Aedes mosquitoes, but both readily infected Toxorynchites mosquitoes. |
T12 |
1059-1240 |
Sentence |
denotes |
In rhesus monkeys, rDEN2Delta30 appeared to be slightly attenuated when compared to the parent virus as measured by duration and peak of viremia and neutralizing antibody induction. |
T13 |
1241-1472 |
Sentence |
denotes |
A derivative of rDEN2Delta30, designated rDEN2Delta30-4995, was generated by incorporation of a point mutation previously identified in the NS3 gene of DEN-4 and was found to be more attenuated than rDEN2Delta30 in SCID-HuH-7 mice. |
T14 |
1473-1485 |
Sentence |
denotes |
CONCLUSIONS: |
T15 |
1486-1626 |
Sentence |
denotes |
The rDEN2Delta30 and rDEN2Delta30-4995 viruses can be considered for evaluation in humans and for inclusion in a tetravalent dengue vaccine. |