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The nature of 'jaws': a new predatory representative of Provora and the ultrastructure of nibbling protists.
Open Biol
December 2024
Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl, Russia.
The recently discovered Provora supergroup has primarily been examined to determine their phylogenomic position in the eukaryotic tree. Their morphology is more poorly studied, and here we focus on their cellular organization and how it compares with that of other supergroups. These small eukaryovorous flagellates exhibit several ultrastructural features that are also found in a subset of taxa from a wide variety of deep-branching lineages (Stramenopiles, Alveolata, Hemimastigophora, Malawimonadidae, Discoba and Metamonada), including vesicles beneath the plasmalemma, two opposing vanes on the flagella, a ventral feeding groove and a fibrillar system resembling the excavate type.
View Article and Find Full Text PDFFrom feather pecking to immunity: Immune differences between lines selected for high and low feather pecking.
Brain Behav Immun
December 2024
Behavioral Physiology of Livestock, Institute of Animal Science, University of Hohenheim, Garbenstr. 17, 70599 Stuttgart, Germany.
Feather pecking (FP) is a serious behavioral disorder in laying hens, leading to feather damage, skin lesions, and often resulting in cannibalism. The mechanisms underlying FP are not clear yet, but recently the role of the immune system as a cause has been discussed. In humans, the interrelation between personality traits and the immune system is well-documented, with impulsivity and hyperactivity linked to distinct alterations in blood immune cell numbers and to elevated levels of pro-inflammatory cytokines.
View Article and Find Full Text PDFCell Cannibalism in Oral Precancerous Lesions and Squamous Cell Carcinoma.
Iran J Otorhinolaryngol
January 2024
Otolaryngology Research Center, Department of Otolaryngology, Shiraz University of Medical sciences, Shiraz, Iran.
Introduction: Cellular cannibalism is defined as a process of non-apoptotic cell death. This phenomenon has been indicated to be associated with aggressiveness, anaplasia, invasiveness, and metastatic potential of various malignancies. The Aim of this study is the evaluation of cell cannibalism in oral dysplastic lesions and oral cancer.
View Article and Find Full Text PDFMicroglia cannibalism during neurodevelopment results in necroptotic cell death.
PLoS Biol
October 2024
Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of America.
Clearance of dying neurons by microglia is critical to healthy neurodevelopment, but what else do microglia eat? A new study in PLOS Biology demonstrates that microglia not only eat neurons but each other, and that this "microglia cannibalism" causes necroptotic cell death.
View Article and Find Full Text PDFMicroglia cannibalism and efferocytosis leads to shorter lifespans of developmental microglia.
PLoS Biol
October 2024
Department of Biological Sciences at the University of Notre Dame, Notre Dame, Indiana, United States of America.
The overproduction of cells and subsequent production of debris is a universal principle of neurodevelopment. Here, we show an additional feature of the developing nervous system that causes neural debris-promoted by the sacrificial nature of embryonic microglia that irreversibly become phagocytic after clearing other neural debris. Described as long-lived, microglia colonize the embryonic brain and persist into adulthood.
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