Toxoplasma gondii is an obligate intracellular parasite that can cause severe complications in the newborn and immunocompromised individuals. The parasite evokes a strong innate immune response in the infected hosts which is followed by a robust adaptive immunity. In the last few years, importance of innate immune mechanisms dependent on the role of MyD-88 independent pathways, inflammatory monocytes and innate lymphocyte have been identified. However, notwithstanding the strong immune response to the parasite, the chronic infection persists in the host. The inability to prevent chronic infection can be attributed to aberration in the memory CD8 T cell response caused by an increased expression of inhibitory receptors that leads to their dysfunctionality.
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http://dx.doi.org/10.1016/j.coi.2022.102226 | DOI Listing |
mSphere
January 2025
Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio, USA.
Miguel Chiurillo works in the field of protein kinases, studying their role in cell signaling and cell cycle progression in . In this mSphere of Influence article, he reflects on how the research articles "Systematic functional analysis of protein kinases identifies regulators of differentiation or survival" by Baker et al. and "Screening the kinome with high throughput tagging identifies a regulator of invasion and egress" by Smith et al.
View Article and Find Full Text PDFPLoS Pathog
January 2025
Department of Pathology, Case Western Reserve University, Cleveland, Ohio, United States of America.
The intracellular protozoan Toxoplasma gondii manipulates host cell signaling to avoid targeting by autophagosomes and lysosomal degradation. Epidermal Growth Factor Receptor (EGFR) is a mediator of this survival strategy. However, EGFR expression is limited in the brain and retina, organs affected in toxoplasmosis.
View Article and Find Full Text PDFMany inflammatory stimuli can induce progenitor cells in the bone marrow to produce increased numbers of myeloid cells as part of the process of emergency myelopoiesis. These events are associated with innate training and can have long-term impacts on hematopoietic stem and progenitor cell (HSPC) development but can also compromise their function. While many cytokines support emergency myelopoiesis, less is known about the mechanisms that temper these events.
View Article and Find Full Text PDFAust Vet J
January 2025
Melbourne Veterinary School, Faculty of Science, The University of Melbourne, Parkville, Victoria, 3052, Australia.
Unlabelled: The southern brown bandicoot (Isoodon obesulus obesulus) is a small, endangered, Australian, ground-dwelling marsupial. Apart from isolated necropsy reports, there has not been a systematic investigation into the health and causes of death for this species.
Objective: To investigate and document the causes of death and the parasites of free-ranging populations of southern brown bandicoots in southern, central Victoria, Australia.
Int J Biol Macromol
January 2025
National Animal Protozoa Laboratory and School of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Shenzhen Key Laboratory of Pathogenic Microbes and Biosafety, and Laboratory of Zoonotic Diseases, School of Public Health (Shenzhen), Sun Yat-Sen University, Shenzhen Campus, Shenzhen 518107, China. Electronic address:
Toxoplasma gondii is an intracellular and parasitic protozoon that harbors specialized cellular structures and molecular mechanisms, including the Plant-like Vacuolar Compartment (PLVAC). The PLVAC performs multifaceted roles in the parasite, contributing to ion homeostasis, proteolysis, pH regulation, and autophagy. Despite significant efforts over the past decade to characterize the PLVAC, the proteins localized to this organelle remain largely unidentified.
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