Related Experiment Video
Updated: Jun 14, 2026
Myeloid Cell Isolation from Mouse Skin and Draining Lymph Node Following Intradermal Immunization with Live Attenuated Plasmodium Sporozoites
Published on: May 18, 2016
Pretreatment with Cry1Ac protoxin modulates the immune response, and increases the survival of Plasmodium-infected
Martha Legorreta-Herrera1, Rodrigo Oviedo Meza, Leticia Moreno-Fierros
1Laboratorio de Inmunología Molecular, Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Iztapalapa 09230, Mexico. marthal@servidor.unam.mx
Abstract:
Malaria is a major global health problem that kills 1-2 million people each year. Despite exhaustive research, naturally acquired immunity is poorly understood. Cry1A proteins are potent immunogens with adjuvant properties and are able to induce strong cellular and humoral responses. In fact, it has been shown that administration of Cry1Ac protoxin alone or with amoebic lysates induces protection against the lethal infection caused by the protozoa Naegleria fowleri. In this work, we studied whether Cry1Ac is able to activate the innate immune response to induce protection against Plasmodium berghei ANKA (lethal) and P. chabaudi AS (nonlethal) parasites in CBA/Ca mice. Treatment with Cry1Ac induced protection against both Plasmodium species in terms of reduced parasitaemia, longer survival time, modulation of pro- and anti-inflammatory cytokines, and increased levels of specific antibodies against Plasmodium. Understanding how to boost innate immunity to Plasmodium infection should lead to immunologically based intervention strategies.
Insights
Cry1Ac protein boosts innate immunity, offering protection against malaria parasites (Plasmodium berghei and Plasmodium chabaudi) in mice. This study highlights Cry1Ac
Area of Science:
- Immunology
- Infectious Diseases
- Parasitology
Background:
- Malaria remains a significant global health threat, causing millions of deaths annually.
- Naturally acquired immunity against malaria is not fully understood, hindering effective intervention strategies.
- Cry1A proteins are known potent immunogens that stimulate robust cellular and humoral immune responses.
Purpose of the Study:
- To investigate the potential of Cry1Ac protein in activating innate immune responses.
- To determine if Cry1Ac confers protection against lethal (Plasmodium berghei ANKA) and nonlethal (Plasmodium chabaudi AS) malaria parasites in a mouse model.
Main Methods:
- Administration of Cry1Ac protein to CBA/Ca mice.
- Infection of mice with Plasmodium berghei ANKA and Plasmodium chabaudi AS.
- Monitoring of parasitemia levels and survival rates.
- Analysis of pro- and anti-inflammatory cytokine profiles.
- Quantification of Plasmodium-specific antibodies.
Main Results:
- Cry1Ac treatment significantly reduced parasitemia in mice infected with both Plasmodium species.
- Mice treated with Cry1Ac exhibited prolonged survival times compared to controls.
- Modulation of key pro- and anti-inflammatory cytokines was observed.
- Elevated levels of Plasmodium-specific antibodies were detected in Cry1Ac-treated mice.
Conclusions:
- Cry1Ac protein effectively activates innate immunity to provide protection against malaria parasites.
- Boosting innate immunity through agents like Cry1Ac presents a promising avenue for developing novel malaria intervention strategies.
- Further research into Cry1Ac-mediated immune responses could lead to new immunological approaches to combat malaria.
