Live Vaccination with Blood-Stage Plasmodium yoelii 17XNL Prevents the Development of Experimental Cerebral Malaria. 2022

Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
Department of Infectious Diseases and Host Defense, Graduate School of Medicine, Gunma University, Maebashi 371-8511, Japan.

In our work, we aim to develop a malaria vaccine with cross-strain (-species) protection. C57BL/6 mice infected with the P. berghei ANKA strain (PbA) develop experimental cerebral malaria (ECM). In contrast, ECM development is inhibited in infected mice depleted of T cells. The clinical applications of immune-cell depletion are limited due to the benefits of host defense against infectious diseases. Therefore, in the present study we attempted to develop a new method for preventing ECM without immune cell depletion. We demonstrated that mice inoculated with a heterologous live-vaccine of P. yoelii 17XNL were able to prevent both ECM and lung pathology and survived longer than control mice when challenged with PbA. Live vaccination protected blood-organ barriers from PbA infection. Meanwhile, live vaccination conferred sterile protection against homologous challenge with the P. yoelii 17XL virulent strain for the long-term. Analysis of the immune response induced by live vaccination showed that cross-reactive antibodies against PbA antigens were generated. IL-10, which has an immunosuppressive effect, was strongly induced in mice challenged with PbA, unlike the pro-inflammatory cytokine IFNγ. These results suggest that the protective effect of heterologous live vaccination against ECM development results from IL-10-mediated host protection.

UI MeSH Term Description Entries

Related Publications

Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
December 2008, Journal of immunology (Baltimore, Md. : 1950),
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
March 2007, Experimental parasitology,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
July 2023, The Journal of biological chemistry,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
January 2023, bioRxiv : the preprint server for biology,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
March 1982, Parasite immunology,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
April 2012, The Journal of parasitology,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
January 2018, Frontiers in immunology,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
January 2016, Malaria research and treatment,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
August 1997, Infection and immunity,
Takashi Imai, and Ha Ngo-Thanh, and Kazutomo Suzue, and Aoi Shimo, and Akihiro Nakamura, and Yutaka Horiuchi, and Hajime Hisaeda, and Takashi Murakami
November 2000, Infection and immunity,
Copied contents to your clipboard!