[No Title Available]

Falleiros, Ângela Maria Ferreira; Bombonato, Maria Terezinha Siqueira; Gregório, Elisa Aparecida

doi:10.1590/s1516-89132003000200021

Cited by 29 publications

(2 citation statements)

References 23 publications

(26 reference statements)

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“…In their investigation on hemocytes of the same insect, Kalia et al (2001) with phase contrast microscopy observed ADs, which had not been previously reported but considered as CGs (Essawy et al, 1985) or GRs (Gupta, 1994). Six types of hemocytes were identified in the sugarcane borer Diatraea saccharalis (Falleiros et al, 2003) and the lemon butterfly Papilio demoleus (Jalali and Salehi, 2008). Six hemocyte types were distinguished in all developmental stages of the variegated grasshopper Zonocerus variegates, namely PRs, PLs, GRs, SPs, OEs and ADs (Ademolu et al, 2010).…”

Section: Six Types Of Hemocytesmentioning

confidence: 99%

Characterization of Qualitative and Quantitative Haemogram Parameters in Insects: Current Concepts and Future Prospects.

Ghoneim

2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

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physiological functions, as previously mentioned. 2.1. Variation in Number and Types of Circulating Hemocytes: It is interesting to give some historical information about the hemocyte classification and characterization. Hollande (1911) firstly attempted to classify and categorize the insect hemocytes after the earlier research works, particularly those of Cuenot (1897) and Kollmann (1908). Then, Wigglesworth (1939) followed each of Hollande's categories. Yeager (1945) identified ten hemocyte classes containing 32 different types in the Southern armyworm Prodenia eridania. Some years later, Jones (1962) reduced this number to nine distinct cell types, and his generalizing work earned a special place in the history of hemocytes, since his classification was the basis used by most researchers thereafter. The same author described eight hemocyte types in insects: PRs, PLs, GRs, Cystocytes (CCs), OEs, ADs, Podocytes (POs), and Vermiform cells (VRs). With this classification, this author established a system to give an order to more than 70 names for hemocyte types used by earlier investigators. Later, Price and Ratcliffe (1974) examined the hemocytes of 15 representative insect orders and distinguished six different types distributed in those orders: PRs, PLs, GRs, spherulocytes (SPs), CCs and OEs; however, CCs were absent in Lepidoptera. Using phase contrast microscopy, Sharma and Dutta (1979) recorded the presence of ten categories of hemocytes: PRs, PLs, GRs, CCs, COs, SPs, ADs, OEs, POs and VRs in the grasshoppers Chrotogonus trachypterus and Acrida exaltata. Although, Gupta (1979) recognized seven main types of haemocytes in various insect orders, namely PRs, PLs, GRs, SPs, ADs, OEs and Coagulocytes (CGs), while Gupta (1994) merged the category CGs with that of GRs. Although Brehelin and Zachary (1986) proposed a new system with nine hemocyte types, the classified categories of haemocytes ranged, generally, from four to seven (Gupta, 1979) or between three and nine (Wigglesworth, 1959; Arnold, 1972, 1974). However, some authors described three to eight hemocyte types in several insect orders by means of the transmission electron microscopy (TEM)(Ratcliffe and Rowley, 1979; Al-Khalifa and Siddiqui, 1985). As reported in the available literature, the main types of hemocytes are PRs, GRs, PLs, SPs and OEs. These hemocyte types have been described in insect species of diverse orders,

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Section: Six Types Of Hemocytesmentioning

confidence: 99%

Characterization of Qualitative and Quantitative Haemogram Parameters in Insects: Current Concepts and Future Prospects.

Ghoneim

2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

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“…The toxicity of methylmercury (MeHg) could adversely impact the survival of the animals, lowering their resistance to stress. The hemocytes circulating in the hemolymph represent the early defensive lineage acting through phagocytosis, nodulation, encapsulation, cytotoxicity and hemolymph coagulation (Falleiros et al 2003;Parisi and Cammarata 2014;Parrinello et al 2016). About that, the viability, the physiology, the numbers and ratio of the different kinds of hemocytes are very important for homeostasis.…”

Section: Introductionmentioning

confidence: 99%

Effects of organic mercury on Mytilus galloprovincialis hemocyte function and morphology

et al. 2020

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Filter-feeding organisms accumulate xenobiotics and other substances in their tissues. They can be useful as sentinel organisms in biomonitoring of the marine compartment. Bivalve cellular immunity is ensured by phagocytosis and cytotoxic reactions carried out by hemocytes in a network with humoral responses. These can be affected by chemical contaminants in water that can be immunosuppressors also at a low concentration increasing the sensibility to pathogens. This work is an attempt to individuate cellular markers for pollution detection, investigating the effect of methylmercury (CH3HgCl) at different concentrations on the activity and hemocyte morphology of the Mediterranean mussel, Mytilus galloprovincialis. We assessed the effect of three sub-lethal concentrations of the organometal on the cellular morphology, the efficacy of phagocytosis toward yeast cells, the alteration of the lysosomal membrane and the ability to release cytotoxic molecules. The results provide information on the alteration of hemocyte viability, modification of the morphological and cytoskeletal features and besides the cellular spreading, intrinsic ability of motile cells was used as a complementary investigation method. Exposure to the contaminant affected the percentage of phagocytosis and the phagocytosis index. Moreover, morphological and cytoskeleton alteration, caused by the pollutant, leads to reduced ability to incorporate the target and adhere to the substrate and the low ability of cells to retain neutral red could depend on the effects of methylmercury on membrane permeability. These results reinforce the use of the Mediterranean mussel as model for the evaluation of environmental quality in aquatic ecosystems integrating the novel information about hemocyte functions and morphology sensibility to organic mercury. Graphic abstract

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Irradiation and parasitism affect the ability of larval hemocytes of Anastrepha obliqua for phagocytosis and the production of reactive oxygen species

Gómez-Alonso

Baltierra‐Uribe

Sánchez-Torres

et al. 2022

Arch Insect Biochem Physiol

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The development of the parasitoid Doryctobracon crawfordi (Viereck) (Hymenoptera: Braconidae) in Anastrepha obliqua (McQuart) (Diptera: Tephritidae) larvae is unviable in nature; however, if the host larva is irradiated at 160 Gy, the parasitoid develops and emerges successfully. This suggests that radiation affects the immune responses of A. obliqua larvae, while the underlying mechanisms remain to be revealed. Using optical and electronic microscopies we determined the number and type of hemocyte populations found inside the A. obliqua larvae, either nonirradiated, irradiated at 160 Gy, parasitized by D. crawfordi, or irradiated and parasitized. Based on flow cytometry, the capacity to produce reactive oxygen species (ROS) was determined by the 123-dihydrorhodamine method in those hemocyte cells. Five cell populations were found in the hemolymph of A. obliqua larvae, two of which (granulocytes and plasmatocytes) can phagocytize and produce ROS. A reduction in the number of cells, mainly of the phagocytic type, was observed, as well as the capacity of these cells to produce ROS, when A. obliqua larvae were irradiated. Both radiation and parasitization decreased the ROS production,

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[No Title Available]

Abstract: Six circulating hemocytes cell types from Diatraea saccharalis (Fabricius) (Lepidoptera: Pyralidae) larvae were identified by transmission and scanning electron microscope: prohemocytes (PR), plasmatocytes (PL) granulocytes (GR), spherulocytes (SP), oenocytoids (OE) and vermicytes (VE

Cited by 29 publications

References 23 publications

Characterization of Qualitative and Quantitative Haemogram Parameters in Insects: Current Concepts and Future Prospects.

Characterization of Qualitative and Quantitative Haemogram Parameters in Insects: Current Concepts and Future Prospects.

Effects of organic mercury on Mytilus galloprovincialis hemocyte function and morphology

Irradiation and parasitism affect the ability of larval hemocytes of Anastrepha obliqua for phagocytosis and the production of reactive oxygen species

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