Digestion In Insects
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Jaburetox: update on a urease-derived peptide
Abstract Urease from Canavalia ensiformis seeds was the first enzyme ever to be crystallized, in 1926. These proteins, found in plants, bacteria and fungi, present different biological properties including catalytic hydrolysis of urea, and also enzyme-independent activities, such as induction of exocytosis, pro-inflammatory effects, neurotoxicity, antifungal
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 08/02/2018
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2. Alternative splicing originates different domain structure organization of Lutzomyia longipalpis chitinases
BACKGROUND The insect chitinase gene family is composed by more than 10 paralogs, which can codify proteins with different domain structures. In Lutzomyia longipalpis, the main vector of visceral leishmaniasis in Brazil, a chitinase cDNA from adult female insects was previously characterized. The predicted protein contains one catalytic domain and one chiti
Mem. Inst. Oswaldo Cruz. Publicado em: 2018-02
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3. Biology and nutrition of Spodoptera frugiperda (Lepidoptera: Noctuidae) fed on different food sources
ABSTRACT: We studied Spodoptera frugiperda development using different food sources in the laboratory and field. Newly hatched larvae were fed soybean, cotton, maize, wheat, and oat leaves. An artificial diet was used as the control. Duration of pre-pupal, pupal, and larva-adult period, pupal weight, sex ratio, survival, larva feeding preferences, ovipositio
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-02
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4. Identification of blood meal sources of Lutzomyia longipalpis using polymerase chain reaction-restriction fragment length polymorphism analysis of the cytochrome B gene
An analysis of the dietary content of haematophagous insects can provide important information about the transmission networks of certain zoonoses. The present study evaluated the potential of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis of the mitochondrial cytochrome B (cytb) gene to differentiate between vertebrat
Mem. Inst. Oswaldo Cruz. Publicado em: 07/05/2014
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5. Disruption of the peritrophic matrix by exogenous chitinase feeding reduces fecundity in Lutzomyia longipalpis females
Lutzomyia longipalpis is the most important vector of visceral leishmaniasis in Brazil. When female sandflies feed on blood, a peritrophic matrix (PM) is formed around the blood bolus. The PM is secreted by midgut cells and composed of proteins, glycoproteins and chitin microfibrils. The PM functions as both a physical barrier against pathogens present in th
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-06
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6. Alimentação de Potamotrygon signata e Potamotrygon orbignyi (Chondrichthyes: potamotrygonidae) na bacia do rio Parnaíba.
The evaluation of this diet, based on stomach content analisys, has already became rutine practice in fish ecology studies. The family Potamotrygonidae, represented by all Neotropical fresh water sting rays, is considered the only eslamobranch family whose members are totally restricted and adapted to this enviroment. The samples were obtained in the months
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2010
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7. Caracterização do mecanismo de controle do pH no tubo digestivo de Lutzomyia longipalpis (Lutz e Neiva, 1912) (Diptera: Psychodidae) e sua importância no desenvolvimento de Leishmania Ross, 1903
The midgut pH control is a key step during Lutzomyia longipalpis digestion process. Phlebotomines have to change from a favorable carbohydrate digestion (luminal pH = 6) to blood digestion (luminal pH~8). Until blood ingestion, the acidic pH in the midgut is rigorously maintained closely to pH 6 by an efficient mechanism. Apparently, alkalization in the abdo
Publicado em: 2010
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8. Clonagem, expressão e caracterização de um inibidor de tripsina presente no mosquito Aedes aegypti / Cloning, expression and characterization of a trypsin inhibitor from Aedes aegypti mosquito.
The Aedes aegypti mosquito is the classic vector of yellow fever and dengue fever. In haematophagous insects, blood digestion is carried out by proteolitic enzymes, which can also be envolved in parasite-vector relationship. Blood feeding requires that haematophagous insects are able to inhibit host hemostatic defenses, containing inhibitors of coagulation c
Publicado em: 2010
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9. Análise quantitativa de células digestivas e regenerativas do intestino médio de Melipona quadrifasciata anthidioides (Hymenoptera; Apidae) / Quantitative analysis of digestive and regenerative cells of the midgut of Melipona quadrifasciata anthidioides (Hymenoptera; Apidae)
Bees have economic importance for their role as crops pollinators, production of honey, wax and propolis. The stingless bees (tribe Meliponini) are specific pollinators of many native plant species, most notably the species Melipona quadrifasciata anthidioides (Kerr et al., 1996). Thus, a deeper understanding of the biology of this species may facilitate a b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2009
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10. Molecular mechanisms of Trypanosoma cruzi infection by oral route
Frequent reports on outbreaks of acute Chagas' disease by ingestion of food contaminated with parasites from triatomine insects illustrate the importance of this mode of transmission. Studies on oral Trypanosoma cruzi infection in mice have indicated that metacyclic trypomastigotes invade the gastric mucosal epithelium. A key molecule in this process is gp82
Memórias do Instituto Oswaldo Cruz. Publicado em: 2009-07
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11. Estudo da ação do inibidor de proteinase de Adenanthera pavonina sobre o desenvolvimento e atividade das proteinases intestinais de lagartas de Diatraea suchharalis (FABR., 1794) / Study of proteinase inhibitor action from Adenanthera pavonina on the development and midgut proteinase activities of the Diatraea sachharalis larvae (FABR., 1794)
Phytophatogous insects and other animals use digestive enzymes, such as amylases and proteinases to process the nutrients obtained from the plants necessary for their development. The sugarcane borer Diatraea saccharalis is the major pest of sugarcane in Brazil and other South American countries. Plants synthesize a variety of molecules, including proteinase
Publicado em: 2008
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12. α-Mannosidases intestinal from Tenebrio molitor (Coleoptera) larvae / α-Manosidases intestinais da larva de Tenebrio molitor (Coleoptera)
Studies of intestinal function were prompted after noticing that the gut is a huge and relatively unprotected interface between the insect and the environment and can thus be used as a target for pest control. In this context, our work involves the purification and characterization of an soluble alpha-mannosidase and detection of a membrane α-mannosidas
Publicado em: 2008