Abstract：
:Mycobacterium tuberculosis, the etiological agent of tuberculosis (TB), is an important human pathogen. Bacillus Calmette-Guérin (BCG), a live, attenuated variant of Mycobacterium bovis, is currently the only available TB vaccine despite its low efficacy against the infectious pulmonary form of the disease in adults. Thus, a more-effective TB vaccine is needed. Parainfluenza virus 5 (PIV5), a paramyxovirus, has several characteristics that make it an attractive vaccine vector. It is safe, inexpensive to produce, and has been previously shown to be efficacious as the backbone of vaccines for influenza, rabies, and respiratory syncytial virus. In this work, recombinant PIV5 expressing M. tuberculosis antigens 85A (PIV5-85A) and 85B (PIV5-85B) have been generated and their immunogenicity and protective efficacy evaluated in a mouse aerosol infection model. In a long-term protection study, a single dose of PIV5-85A was found to be most effective in reducing M. tuberculosis colony forming units (CFU) in lungs when compared to unvaccinated, whereas the BCG vaccinated animals had similar numbers of CFUs to unvaccinated animals. BCG-prime followed by a PIV5-85A or PIV5-85B boost produced better outcomes highlighted by close to three-log units lower lung CFUs compared to PBS. The results indicate that PIV5-based M. tuberculosis vaccines are promising candidates for further development.
journal_name
Vaccinejournal_title
Vaccineauthors
Chen Z,Gupta T,Xu P,Phan S,Pickar A,Yau W,Karls RK,Quinn FD,Sakamoto K,He Bdoi
10.1016/j.vaccine.2015.10.124subject
Has Abstractpub_date
2015-12-16 00:00:00pages
7217-7224issue
51eissn
0264-410Xissn
1873-2518pii
S0264-410X(15)01580-7journal_volume
33pub_type
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