Protective effects of the Francisella tularensis ΔpdpC mutant against its virulent parental strain SCHU P9 in Cynomolgus macaques
Protective effects of the Francisella tularensis ΔpdpC mutant against its virulent parental strain SCHU P9 in Cynomolgus macaques
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土拉弗朗西斯菌 ΔpdpC 突变体对其毒力亲本菌株 SCHU P9 在食蟹猴中的保护作用
DOI:
10.1038/s41598-019-45412-8
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Shigeru Morikawa
中科院分区:
文献类型:
--
作者:
Deyu Tian;Akihiko Uda;Yasushi Ami;Akitoyo Hotta;Eun-sil Park;Noriyo Nagata;Naoko Iwata-Yoshikawa;Akio Yamada;Kazuhiro Hirayama;Kozue Miura;Yuki Koyama;Mika Azaki;Shigeru Morikawa
Tularemia is a severe infectious zoonotic disease caused byFrancisella tularensis. AlthoughF. tularensisis considered to be a potential biological weapon due to its high infectivity and mortality rate, no vaccine has been currently licensed. Recently, we reported thatF. tularensisSCHU P9 derived ΔpdpCstrain lacking the pathogenicity determinant protein C gene conferred stable and good protection in a mouse lethal model. In this study, the protective effect of ΔpdpCwas evaluated using a monkey lethal model. Two cynomolgus macaques (Macaca fascicularis) intratracheally challenged with the virulent strain SCHU P9 were euthanized on 7 and 11 days post-challenge after the development of severe clinical signs. The bacterial replication in alveolar macrophages and type II epithelial cells in the lungs would cause severe pneumonia accompanied by necrosis. Conversely, two animals subcutaneously immunized with ΔpdpCsurvived 3 weeks after SCHU P9 challenge. Though one of the two animals developed mild symptoms of tularemia, bacterial replication was limited in the respiratory organs, which may be due to a high level of humoral and cellular immune responses againstF. tularensis. These results suggest that the ΔpdpCmutant would be a safe and promising candidate as a live attenuated tularemia vaccine.
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影响因子:
5.5
作者:
Bakshi CS;Malik M;Mahawar M;Kirimanjeswara GS;Hazlett KR;Palmer LE;Furie MB;Singh R;Melendez JA;Sellati TJ;Metzger DW
通讯作者:
Metzger DW
影响因子:
3.2
作者:
HESSELBROCK, W;FOSHAY, L
通讯作者:
FOSHAY, L
影响因子:
4.4
作者:
Rodriguez, Stephen A.;Yu, Jieh-Juen;Klose, Karl E.
通讯作者:
Klose, Karl E.
影响因子:
3.3
作者:
A. Strašková;P. Spidlova;S. Mou;P. Worsham;Daniela Putzová;I. Pavkova;J. Stulík
通讯作者:
J. Stulík
影响因子:
3.1
作者:
SCHRICKER, RL;HALL, WC;EIGELSBACH, HT
通讯作者:
EIGELSBACH, HT