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Adam G Peres et al.
Infection and immunity, 83(4), 1587-1597 (2015-02-04)
Staphylococcus aureus is a Gram-positive bacterium that is carried by a quarter of the healthy human population and that can cause severe infections. This pathobiosis has been linked to a balance between Toll-like receptor 2 (TLR2)-dependent pro- and anti-inflammatory responses.
Kelly E Coller et al.
PLoS pathogens, 5(12), e1000702-e1000702 (2009-12-31)
Hepatitis C virus (HCV) enters hepatocytes following a complex set of receptor interactions, culminating in internalization via clathrin-mediated endocytosis. However, aside from receptors, little is known about the cellular molecular requirements for infectious HCV entry. Therefore, we analyzed a siRNA
Melissa A Badding et al.
PloS one, 9(6), e101310-e101310 (2014-07-01)
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. While federal regulations have reduced permissible worker exposure
Michael P Blundell et al.
Proceedings of the National Academy of Sciences of the United States of America, 106(37), 15738-15743 (2009-10-07)
The Wiskott-Aldrich syndrome protein (WASp) is a key cytoskeletal regulator in hematopoietic cells. Covalent modification of a conserved tyrosine by phosphorylation has emerged as an important potential determinant of activity, although the physiological significance remains uncertain. In a murine knockin
Martin A Bewley et al.
mBio, 5(5), e01710-e01714 (2014-10-09)
Intracellular killing of Streptococcus pneumoniae is complemented by induction of macrophage apoptosis. Here, we show that the toxin pneumolysin (PLY) contributes both to lysosomal/phagolysosomal membrane permeabilization (LMP), an upstream event programing susceptibility to apoptosis, and to apoptosis execution via a
Paulina Nastały et al.
Nature communications, 11(1), 2122-2122 (2020-05-03)
Cell polarity refers to the intrinsic asymmetry of cells, including the orientation of the cytoskeleton. It affects cell shape and structure as well as the distribution of proteins and organelles. In migratory cells, front-rear polarity is essential and dictates movement
Giuliano Scarcelli et al.
Nature methods, 12(12), 1132-1134 (2015-10-06)
Current measurements of the biomechanical properties of cells require physical contact with cells or lack subcellular resolution. Here we developed a label-free microscopy technique based on Brillouin light scattering that is capable of measuring an intracellular longitudinal modulus with optical
Johannes Rheinlaender et al.
Thrombosis and haemostasis, 113(2), 305-311 (2014-10-31)
Platelet activation plays a critical role in haemostasis and thrombosis. It is well-known that platelets generate contractile forces during activation. However, their mechanical material properties have rarely been investigated. Here, we use scanning ion conductance microscopy (SICM) to visualise morphological
Chris P Verschoor et al.
Human immunology, 75(12), 1192-1196 (2014-12-03)
The advanced-age, frail elderly are especially vulnerable to developing pneumococcal infection and disease. Macrophages are critical mediators in the defence against Streptococcus pneumoniae at the upper respiratory tract, however, little is known of their anti-pneumococcal capacity in the elderly. Herein
Sarah Escuin et al.
Journal of cell science, 128(14), 2468-2481 (2015-06-05)
The cytoskeleton is widely considered essential for neurulation, yet the mouse spinal neural tube can close despite genetic and non-genetic disruption of the cytoskeleton. To investigate this apparent contradiction, we applied cytoskeletal inhibitors to mouse embryos in culture. Preventing actomyosin
Thibault G Sana et al.
mBio, 6(3), e00712-e00712 (2015-06-04)
Invasion of nonphagocytic cells through rearrangement of the actin cytoskeleton is a common immune evasion mechanism used by most intracellular bacteria. However, some pathogens modulate host microtubules as well by a still poorly understood mechanism. In this study, we aim
Alexandre B Roland et al.
eLife, 3, e03159-e03159 (2014-09-17)
Endocannabinoids are recently recognized regulators of brain development, but molecular effectors downstream of type-1 cannabinoid receptor (CB1R)-activation remain incompletely understood. We report atypical coupling of neuronal CB1Rs, after activation by endo- or exocannabinoids such as the marijuana component ∆(9)-tetrahydrocannabinol, to
Manuela Lahne et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 35(47), 15612-15634 (2015-11-27)
Loss of retinal neurons in adult zebrafish (Danio rerio) induces a robust regenerative response mediated by the reentry of the resident Müller glia into the cell cycle. Upon initiating Müller glia proliferation, their nuclei migrate along the apicobasal axis of
Amrita Das et al.
PLoS neglected tropical diseases, 8(8), e3091-e3091 (2014-08-22)
With the paucity of new drugs and HIV co-infection, vaccination remains an unmet research priority to combat visceral leishmaniasis (VL) requiring strong cellular immunity. Protein vaccination often suffers from low immunogenicity and poor generation of memory T cells for long-lasting
Kristen Whalen et al.
Molecular biology of the cell, 23(18), 3663-3672 (2012-08-03)
Fertilization changes the structure and function of the cell surface. In sea urchins, these changes include polymerization of cortical actin and a coincident, switch-like increase in the activity of the multidrug efflux transporter ABCB1a. However, it is not clear how
Olga Ganeshina et al.
Biology letters, 8(6), 1023-1027 (2012-10-19)
In mammals, memory formation and stabilization requires polymerization of actin. Here, we show that, in the honeybee, inhibition of actin polymerization within the brain centres involved in memory formation, the mushroom bodies (MBs), enhances associative olfactory memory. Local application of
Saptarshi Roy et al.
Biochimica et biophysica acta, 1838(8), 2011-2018 (2014-05-02)
Visceral leishmaniasis is a vector-borne disease caused by an obligate intracellular protozoan parasite Leishmania donovani. The molecular mechanism involved in internalization of Leishmania is poorly understood. The entry of Leishmania involves interaction with the plasma membrane of host cells. We
Noam Erez et al.
Virology journal, 6, 151-151 (2009-09-30)
Ectromelia virus, a member of the Orthopox genus, is the causative agent of the highly infectious mousepox disease. Previous studies have shown that different poxviruses induce cell-cell fusion which is manifested by the formation of multinucleated-giant cells (polykaryocytes). This phenomenon
Dongdong Li et al.
The Journal of physiology, 593(13), 2807-2832 (2015-04-14)
Mouse cortical astrocytes express VAMP3 but not VAMP2. VAMP3 vesicles undergo Ca(2+) -independent exo- and endocytotic cycling at the plasma membrane. VAMP3 vesicle traffic regulates the recycling of plasma membrane glutamate transporters. cAMP modulates VAMP3 vesicle cycling and glutamate uptake.
Özen Sercan Alp et al.
European journal of immunology, 45(4), 975-987 (2015-02-03)
It is believed that memory CD8(+) T cells are maintained in secondary lymphoid tissues, peripheral tissues, and BM by homeostatic proliferation. Their survival has been shown to be dependent on IL-7, but it is unclear where they acquire it. Here we
Yi-Wei Huang et al.
Journal of cellular physiology, 230(9), 2086-2097 (2015-02-03)
Ca(2+) -mediated formation of cell polarity is essential for directional migration which plays an important role in physiological and pathological processes in organisms. To examine the critical role of store-operated Ca(2+) entry, which is the major form of extracellular Ca(2+)
Luc H Boudreau et al.
Blood, 124(14), 2173-2183 (2014-08-02)
Mitochondrial DNA (mtDNA) is a highly potent inflammatory trigger and is reportedly found outside the cells in blood in various pathologies. Platelets are abundant in blood where they promote hemostasis. Although lacking a nucleus, platelets contain functional mitochondria. On activation
Henrik Andersson et al.
PloS one, 9(7), e101514-e101514 (2014-07-08)
Macrophages in the lung are the primary cells being infected by Mycobacterium tuberculosis (Mtb) during the initial manifestation of tuberculosis. Since the adaptive immune response to Mtb is delayed, innate immune cells such as macrophages and neutrophils mount the early
Fushan Shi et al.
Journal of neuroimmunology, 260(1-2), 121-125 (2013-05-18)
Prion diseases are neurodegenerative disorders characterized by the accumulation of misfolded prion protein. In a previous study, we showed that neurotoxic prion peptide (PrP106-126) induced NALP3 inflammasome activation in mouse primary and immortalized microglia. In the present work, we examined
Qiaoya Lin et al.
Pharmaceutical research, 31(6), 1438-1449 (2013-04-30)
Molecular therapeutics often require an effective nanoparticle-based delivery strategy to transport them to cytosolic organelles to be functional. Recently, a cytosolic delivery strategy based on the scavenger receptor class B type I (SR-BI) mediated pathway has shown great potential for
N R Popova et al.
Molecules (Basel, Switzerland), 25(13) (2020-07-02)
Cerium oxide nanoparticles (nanoceria) are believed to be the most versatile nanozyme, showing great promise for biomedical applications. At the same time, the controlled intracellular delivery of nanoceria remains an unresolved problem. Here, we have demonstrated the radioprotective effect of
Boguslaw S Wojczyk et al.
Transfusion, 54(12), 3186-3197 (2014-07-22)
In mice, refrigerator-stored red blood cells (RBCs) are cleared by extravascular hemolysis and induce cytokine production. To enhance understanding of this phenomenon, we sought to model it in vitro. Ingestion of refrigerator-stored murine RBCs and subsequent cytokine production were studied
Simon Döhrmann et al.
Infection and immunity, 82(10), 4011-4020 (2014-07-16)
Streptococcal collagen-like protein 1 (Scl-1) is one of the most highly expressed proteins in the invasive M1T1 serotype group A Streptococcus (GAS), a globally disseminated clone associated with higher risk of severe invasive infections. Previous studies using recombinant Scl-1 protein
Jena Fediuk et al.
American journal of physiology. Lung cellular and molecular physiology, 307(11), L877-L887 (2014-10-05)
In hypoxic pulmonary arterial (PA) myocytes, challenge with thromboxane mimetic U46619 induces marked actin polymerization and contraction, phenotypic features of persistent pulmonary hypertension of the newborn (PPHN). Rho GTPases regulate the actin cytoskeleton. We previously reported that U46619-induced actin polymerization
Sriram Sundaravel et al.
Proceedings of the National Academy of Sciences of the United States of America, 112(46), E6359-E6368 (2015-11-19)
Anemia is the predominant clinical manifestation of myelodysplastic syndromes (MDS). Loss or deletion of chromosome 7 is commonly seen in MDS and leads to a poor prognosis. However, the identity of functionally relevant, dysplasia-causing, genes on 7q remains unclear. Dedicator
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