Abstract:
:There are currently no vaccines or therapeutics to prevent dengue disease which ranges in severity from asymptomatic infections to life-threatening illness. The National Institute of Allergy and Infectious Diseases (NIAID) Division of Intramural Research has developed live, attenuated vaccines to each of the four dengue serotypes (DENV-1-DENV-4). Two doses (10PFU and 1000PFU) of three monovalent vaccines were tested in human clinical trials to compare safety and immunogenicity profiles. DEN4Δ30 had been tested previously at multiple doses. The three dengue vaccine candidates tested (DEN1Δ30, DEN2/4Δ30, and DEN3Δ30/31) were very infectious, each with a human infectious dose 50%≤ 10PFU. Further, infectivity rates ranged from 90 to 100% regardless of dose, excepting DEN2/4Δ30 which dropped from 100% at the 1000PFU dose to 60% at the 10PFU dose. Mean geometric peak antibody titers did not differ significantly between doses for DEN1Δ30 (92 ± 19 vs. 214 ± 97, p=0.08); however, significant differences were observed between the 10PFU and 1000PFU doses for DEN2/4Δ30, 19 ± 9 vs. 102 ± 25 (p=0.001), and DEN3Δ30/31, 119 ± 135 vs. 50 ± 50 (p=0.046). No differences in the incidences of rash, neutropenia, or viremia were observed between doses for any vaccines, though the mean peak titer of viremia for DEN1Δ30 was higher at the 1000PFU dose (0.5 ± 0 vs. 1.1 ± 0.1, p=0.007). These data demonstrate that a target dose of 1000PFU for inclusion of each dengue serotype into a tetravalent vaccine is likely to be safe and generate a balanced immune response for all serotypes.
journal_name
Vaccinejournal_title
Vaccineauthors
Lindow JC,Durbin AP,Whitehead SS,Pierce KK,Carmolli MP,Kirkpatrick BDdoi
10.1016/j.vaccine.2013.05.075subject
Has Abstractpub_date
2013-07-18 00:00:00pages
3347-52issue
33eissn
0264-410Xissn
1873-2518pii
S0264-410X(13)00690-7journal_volume
31pub_type
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