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Showing 1 to 20 of 21 for “"Hemocytes"”.
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Flow Cytometric Analysis of Crayfish Hemocytes.
<p>Crayfish exhibit innate immune responses via hemocytes and their products. There are 3 hemocyte populations: hyaline cells, granular cells, and semigranular cells. Hemocytes from laboratory housed, untreated crayfish (normal crayfish) have been quantified on the basis of cell type, cell size, …
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Characterization of Hemocytes in Amblyomma americanum and Investigation of TRAF6’s Role in Proliferation of Hemocytes in Response to Infection
… examined. To investigate cellular processes, hemocytes produced in response to gram-negative infection were characterized according to their ultrastructure. Four hemocyte types were identified: prohemocytes, plasmatocytes, type-I granulocytes, and type-II granulocytes. To elucidate molecular …
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Impact of Temperature and Microbial Infection on the Honey Bee Hemocytes
… <p>Honey bees (Apis mellifera) rely on hemocytes for immunity, wound healing, and hemolymph homeostasis. While 32°C reflects optimal hive conditions, suboptimal temperatures (22°C) and stressors like pathogens (Varroa destructor, bacteria) or pesticides impair hemocyte function. Using …
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Mannose and Lipopolysaccharide Receptors on the Surface of Granular Hemocytes from the Crayfish <em>Procambarus clarkii</em>.
<p><em>Procambarus clarkii</em> hemocytes have been shown to bind to both LPS and a mannose containing neoglycoprotein conjugated to fluorescent probes. A decrease in the observed number of fluorescent hemocytes indirectly indicated that the binding of FITC-LPS to these cells is impaired by initial …
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Host Defense Mechanisms in the Crayfish: the Effect of Injection with Live or Killed Bacteria.
… of SRBCs to <em>Procambarus clarkii</em> hemocytes has been shown after the crayfish were injected with a live or killed <em>Pseudomonas</em> strain RS2b. The increase in attachment occurred at 8 hours post injection and peaked at 24 hours for both experimental groups. The population of …
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The Effects of Lipopolysaccharide Vaccination, X-Irradiation, and Bacterial Inoculation on The Hemocytes of The Yellow Mealworm, Tenebrio Molitor (Linnaeus)
Made available in DSpace on 2015-05-14T14:57:12Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7500259.PDF: 7684963 bytes, checksum: 087b65490e83865ae4e761baf75e68fd (MD5) Previous issue date: 1974
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Immunity Against Malaria: an Atlas of the Mosquito Cellular Immune System at Single Cell Resolution
… pathogens. These efforts are coordinated by hemocytes, the insect equivalent to vertebrate’s white blood cells, circulating in the hemolymph within the insects’ body cavity. Yet, hemocyte biology is largely unknown, mainly due to the low number and fragility of mosquito immune cells. Here we …
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Damage-Induced Inflammation and Nociceptive Hypersensitivity In Drosophila Larvae
… fluorescent epidermal cells and blood cells (hemocytes). Using live imaging, we monitored the circulatory dynamics of hemocytes and the methods by which they accumulate at epidermal wounds. We found that circulating hemocytes attach to wound sites directly from circulation, a mechanism once …
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Understanding Virulence Mechanisms of Parasitoid Wasps of Drosophila: A Comparative Approach Across Clades
… <em>L. heterotoma</em>, these vesicles kill host hemocytes, respectively, such that the encapsulation response in <em>D. melanogaster</em> is suppressed. A putative virulence protein, SSp40 in <em>L. heterotoma</em> EVs, triggers lamellocyte lysis. SSp40 is structurally similar to the bacterial …
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Molecular and genetic studies on a SipD/IpaD-related virulence spike protein from immune-suppressive particles of a Drosophila parasitoid
… by changing the morphology and function of hemocytes, or killing them. Previous studies have identified an abundant surface/spike protein (SSp40) from <em>Leptopilina heterotoma</em> EVs. While p40, a predicted membrane protein, is synthesized in the secretory cells of the venom gland …
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The Effect of Divalent Cations on the Prophenoloxidase Enzyme Cascade Activity in the Freshwater Crayfish Cambarus Latimanus
… prophenoloxidase system (proPO) was studied in hemocytes of the crayfish Cambarus latimanus. It was demonstrated that cadmium, calcium, copper and lead increased proPO activity significantly, whereas magnesium had no statistically significant effect on the system. Also, the molecular weight of …
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CHARACTERIZING ECDYSTEROID TITER PROFILES AND THE FUNCTIONAL ROLE OF ECDYSTEROIDS IN ADULT WORKER HONEY BEES (APIS MELLIFERA)
… evidence of a modulatory effect of QMP on hemocytes in worker bees and a potential enhanced recovery from a decrease in hemocytes by treatment of 20E. I also provide evidence that bees held in queenless conditions may have unique immunocompetence profiles, specifically reducing the …
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CYTO-GENOTOXIC EFFECTS OF SOME PHARMACEUTICAL AND PERSONAL CARE PRODUCTS (PPCPS) ON THE FRESHWATER BIVALVE ZEBRA MUSSEL (DREISSENA POLYMORPHA)
… out by using an in vitro approach on the mussel hemocytes. Genotoxicity was evaluated by SCGE (single cell gel electrophoresis) and DNA diffusion assay, while cytotoxicity was checked by Neutral Red Retention Assay (NRRA). By analyzing the obtained results we drawn the first toxicity scale for …
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Identification and Characterization of a Relish-type NF-kB, DvRelish in Dermacentor variabilis, the American Dog Tick
… induced the increased expression of dvrelish in hemocytes at 1 hour post injection, and in combined tissues at 6 hours post injected. Injection with similar and lower doses of P. aeruginosa and Rickettsia parkeri did not significantly change dvrelish expression. When capillary fed R. rickettsii, …
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Host preference of Perkinsus species: epizootiological, environmental, and molecular aspects
… reaction mixture. P. marinus resides in oyster hemocytes scavenging and/or inhibiting the production of reactive oxygen species (ROS) usually generated by oyster hemocytes. ROS scavenging enzymes include superoxide dismutases (SODs) and peroxidases such as catalases. SODs have been characterized …
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Regulation of Antimicrobial Peptide Genes in Insects by the Toll Pathway and NF-kB Transcription Factors
… responses include insect blood cells known as hemocytes that are involved in phagocytosis, nodulation, encapsulation, and wound healing. The humoral immune responses, on the other hand include production of antimicrobial peptides (AMPs) by fat body, which is equivalent to mammalian liver, …
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Acute Nitrate Exposure Causes Proteomic Changes Consistent with the Regulation of Reactive Oxygen and Nitrogen Species
… response to reactive nitrogen species,phagocytic hemocytes inhibit the production of reactive oxygen species, potentially compromising the immune response of oysters to invading pathogens.
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The Heparan Sulfate Proteoglycan Perlecan Regulates Axonal and Synaptic Stability
… from neurons, glia, muscle, fat body, or hemocytes does not cause synaptic retraction, indicating the protein is secreted from multiple cell types and functions non-cell autonomously. Within the peripheral nervous system, Perlecan predominantly localizes to the neural lamella, a …
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The Ecological Ramifications of Disease and Density in the Caribbean Spiny Lobster, <i>Panulirus argus</i>
… hemolymph that does not clot. HLV-PA infects the hemocytes of host lobsters, specifically the hyalinocytes and semi-granulocytes, but not the granulocytes. When hemolymph from infected donors was injected into healthy juvenile lobsters, 90% of the healthy individuals became infected within 80 …
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