Track topics on Twitter Track topics that are important to you
Humoral immunity is important in limiting clinical disease in malaria, yet the longitudinal B cell response to infection remains unclear. We performed a 1-year prospective study in patients treated for acute P. falciparum malaria for the first time, or with previous exposure to the disease. Using an unbiased exploratory approach with mass cytometry, followed by targeted flow cytometry, we found that ~80% of mature B cells that proliferated in response to acute infection expressed CD11c. Only ~40% of CD11c+ B cells displayed an atypical B cell phenotype, with the remaining cells primarily made up of activated- and resting memory B cells. The CD11c+ B cells expanded rapidly following infection, with previous exposure to malaria resulting in a significantly larger increase compared to individuals with primary infection. This was attributed to an expansion of switched CD11c+ B cells that was absent in primary infected individuals. The rate of contraction of the CD11c+ B cell compartment was independent of previous exposure to malaria and displayed a slow decay with a half-life of ~300 days. Collectively, these results identify CD11c as a marker of B cells responding to malaria and further highlight differences in primary- and secondary B cell responses during infection.
This article was published in the following journal.
Name: JCI insight
The virulence of intracellular pathogens such as Leishmania major (L. major) relies largely on their ability to undergo cycles of replication within phagocytes, release, and uptake into new host cells...
Tumor-reactive T cell exhaustion prevents the success of immune therapies. Pegilodecakin activates intratumoral CD8 T cells in mice and induces objective tumor responses in patients. Here we report ...
Malaria remains an important global disease. Despite significant advances over the past decade in reducing disease morbidity and mortality, new measures are needed if malaria is to be eliminated. Sign...
Clonal VDJ rearrangement of B/T cell receptors (B/TCRs) occurring during B/T lymphocyte development has been used as a marker to track the clonality of B/T cell populations.
Plant organ development to a specific size and shape is controlled by cell proliferation and cell expansion. Here, we identify a novel Myb-like Arabidopsis gene, Development Related Myb-like1 (DRMY1),...
The purpose of this study is to evaluate the relationship between plasma DNA levels and micro- and macro-circulatory vascular remodelling in patients with sickle cell disease
Background: - The disease malaria can cause very serious health problems. Researchers want to see if malaria affects the way T cells and vaccines work in the body. If it does, they may ne...
The purpose of this study is to assess the safety and immunogenicity of the candidate malaria vaccine in HIV-infected infants and children This protocol posting has been updated following ...
The study is designed to establish infectivity of Plasmodium falciparum sporozoites (PfSPZ) via intravenous (IV) administration in three groups with different malaria immunity-status: 1...
This protocol is to obtain tumor tissues and blood samples from patients with a confirmed histological diagnosis of Small cell lung cancer(SCLC) for molecular profiling.
The determination of the pattern of genes expressed at the level of GENETIC TRANSCRIPTION, under specific circumstances or in a specific cell.
A family of receptors that modulate the activation of T-LYMPHOCYTES by the T-CELL ANTIGEN RECEPTOR. The receptors are responsive to one or more B7 ANTIGENS found on ANTIGEN-PRESENTING CELLS and, depending upon the specific ligand-receptor combination, modulate a variety of T-cell functions such as the rate of clonal expansion, CELL SURVIVAL and cytokine production. Although commonly referred to as costimulatory receptors, some of the receptors have inhibitory effects such as inducing PERIPHERAL TOLERANCE.
Non-invasive imaging of cells that have been labeled non-destructively, such as with nanoemulsions or reporter genes that can be detected by molecular imaging, to monitor their location, viability, cell lineage expansion, response to drugs, movement, or other behaviors in vivo.
Malaria caused by PLASMODIUM VIVAX. This form of malaria is less severe than MALARIA, FALCIPARUM, but there is a higher probability for relapses to occur. Febrile paroxysms often occur every other day.
The mechanisms by which a cell becomes internalized in another. The host cell may engulf another as do PHAGOCYTIC CELLS, or the host cell may be invaded by another cell (ENTOSIS), or internalization processes may involve the cooperation of both the host cell and the cell being internalized. Viable cells may remain in non-phagocytic cells (EMPERIPOLESIS), undergo cell division, pass through and then out of the host cell (TRANSCELLULAR CELL MIGRATION), or trigger APOPTOSIS of the invaded cell.
Antiretroviral Therapy Clostridium Difficile Ebola HIV & AIDS Infectious Diseases Influenza Malaria Measles Sepsis Swine Flu Tropical Medicine Tuberculosis Infectious diseases are caused by pathogenic...
Allergies Automimmune Disease Human Papillomavirus (HPV) Immunology Vaccine Immunology is the study of immunity and the defence mechanisms of the body. A greater understanding of immunology is needed to develop vaccines, understand ...