Literatura científica selecionada sobre o tema "Social wasps venoms"
Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos
Consulte a lista de atuais artigos, livros, teses, anais de congressos e outras fontes científicas relevantes para o tema "Social wasps venoms".
Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.
Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.
Artigos de revistas sobre o assunto "Social wasps venoms"
1
Schmidt, Justin O. "Pain and Lethality Induced by Insect Stings: An Exploratory and Correlational Study". Toxins 11, n.º 7 (21 de julho de 2019): 427. http://dx.doi.org/10.3390/toxins11070427.
Texto completo da fonteResumo:
Pain is a natural bioassay for detecting and quantifying biological activities of venoms. The painfulness of stings delivered by ants, wasps, and bees can be easily measured in the field or lab using the stinging insect pain scale that rates the pain intensity from 1 to 4, with 1 being minor pain, and 4 being extreme, debilitating, excruciating pain. The painfulness of stings of 96 species of stinging insects and the lethalities of the venoms of 90 species was determined and utilized for pinpointing future directions for investigating venoms having pharmaceutically active principles that could benefit humanity. The findings suggest several under- or unexplored insect venoms worthy of future investigations, including: those that have exceedingly painful venoms, yet with extremely low lethality—tarantula hawk wasps (Pepsis) and velvet ants (Mutillidae); those that have extremely lethal venoms, yet induce very little pain—the ants, Daceton and Tetraponera; and those that have venomous stings and are both painful and lethal—the ants Pogonomyrmex, Paraponera, Myrmecia, Neoponera, and the social wasps Synoeca, Agelaia, and Brachygastra. Taken together, and separately, sting pain and venom lethality point to promising directions for mining of pharmaceutically active components derived from insect venoms.
2
Schoeters, E., J. Billen e J. O. Schmidt. "Venom gland morphology in Pepsis pallidolimbata pallidolimbata and biological use and activity of Pepsis venom". Canadian Journal of Zoology 75, n.º 7 (1 de julho de 1997): 1014–19. http://dx.doi.org/10.1139/z97-122.
Texto completo da fonteResumo:
Spider wasps, i.e., the family Pompilidae, in general, and those belonging to the genus Pepsis in particular, are acknowledged to possess venoms that are algogenic to humans and thus have the parsimonious functions of causing paralysis and providing defense against predators. The morphological organization of the venom system and its complex convoluted gland closely resembles that in social members of the Vespidae. These features distinguish the venom glands of the Pompilidae from those of the sibling family Mutillidae as well as those of the family Sphecidae, which lack convoluted glands. Although the venom glands in Pepsis species are very similar in morphology to those of social vespids, the lethality of Pepsis venom to mammals is several times less than that of the social common wasps. These findings suggest that in terms of the evolution of venom activity and the associated glandular structures, there was apparently no need for social wasps to develop extra parts of the venom system for producing toxic, lethal, or powerful algogenic components. All of the glandular parts of the venom gland of social wasps were already present in pompilids (and eumenids) and, presumably, in their ancestors.
3
Abd El-Wahed, Aida, Nermeen Yosri, Hanem H. Sakr, Ming Du, Ahmed F. M. Algethami, Chao Zhao, Ahmed H. Abdelazeem et al. "Wasp Venom Biochemical Components and Their Potential in Biological Applications and Nanotechnological Interventions". Toxins 13, n.º 3 (12 de março de 2021): 206. http://dx.doi.org/10.3390/toxins13030206.
Texto completo da fonteResumo:
Wasps, members of the order Hymenoptera, are distributed in different parts of the world, including Brazil, Thailand, Japan, Korea, and Argentina. The lifestyles of the wasps are solitary and social. Social wasps use venom as a defensive measure to protect their colonies, whereas solitary wasps use their venom to capture prey. Chemically, wasp venom possesses a wide variety of enzymes, proteins, peptides, volatile compounds, and bioactive constituents, which include phospholipase A2, antigen 5, mastoparan, and decoralin. The bioactive constituents have anticancer, antimicrobial, and anti-inflammatory effects. However, the limited quantities of wasp venom and the scarcity of advanced strategies for the synthesis of wasp venom’s bioactive compounds remain a challenge facing the effective usage of wasp venom. Solid-phase peptide synthesis is currently used to prepare wasp venom peptides and their analogs such as mastoparan, anoplin, decoralin, polybia-CP, and polydim-I. The goal of the current review is to highlight the medicinal value of the wasp venom compounds, as well as limitations and possibilities. Wasp venom could be a potential and novel natural source to develop innovative pharmaceuticals and new agents for drug discovery.
4
Palma, Mario Sergio. "Exploring the arsenal of peptide toxins from the venoms of social wasps for the rational development of novel therapeutic drugs". Toxicon 168 (outubro de 2019): S4. http://dx.doi.org/10.1016/j.toxicon.2019.06.038.
Texto completo da fonte
5
Brigatte, P., Y. Cury, B. M. de Souza, N. B. Baptista-Saidemberg, D. M. Saidemberg, V. P. Gutierrez e Mario Sérgio Palma. "Hyperalgesic and edematogenic effects of peptides isolated from the venoms of honeybee (Apis mellifera) and neotropical social wasps (Polybia paulista and Protonectarina sylveirae)". Amino Acids 40, n.º 1 (24 de fevereiro de 2010): 101–11. http://dx.doi.org/10.1007/s00726-010-0512-8.
Texto completo da fonte
6
Olson, Eric J. "Parachartergus fraternus(Gribodo) (Hymenoptera: Vespidae: Polistinae) Uses Venom When Taking Caterpillar Prey". Psyche: A Journal of Entomology 103, n.º 1-2 (2000): 85–93. http://dx.doi.org/10.1155/2000/62738.
Texto completo da fonteResumo:
A forager of the eusocial waspParachartergus fraternusused its venom to subdue an unidentified small caterpillar, and anotherP. fraternusforager repeatedly stung a large saturniid caterpillar. In both instances, the wasp stung the larva and then waited nearby until the prey was fully paralyzed before biting it into manageable packets of meat. A review of the literature on social wasp foraging yielded no similar observations of a social wasp using venom when killing prey. Elements of the foraging behavior ofP. fraternusare also seen in the foraging behavior of the Eumeninae, the solitary wasp taxon most closely related to eusocial wasps.
7
Yoon, Kyungjae Andrew, Kyungmun Kim, Woo-Jin Kim, Woo Young Bang, Neung-Ho Ahn, Chang-Hwan Bae, Joo-Hong Yeo e Si Hyeock Lee. "Characterization of Venom Components and Their Phylogenetic Properties in Some Aculeate Bumblebees and Wasps". Toxins 12, n.º 1 (14 de janeiro de 2020): 47. http://dx.doi.org/10.3390/toxins12010047.
Texto completo da fonteResumo:
To identify and compare venom components and expression patterns, venom gland-specific transcriptome analyses were conducted for 14 Aculeate bees and wasps. TPM (transcripts per kilobase million) values were normalized using the average transcription level of a reference housekeeping gene (dimethyladenosine transferase). Orthologous venom component genes across the 14 bee and wasp species were identified, and their relative abundance in each species was determined by comparing normalized TPM values. Based on signal sequences in the transcripts, the genes of novel venom components were identified and characterized to encode potential allergens. Most of the allergens and pain-producing factors (arginine kinase, hyaluronidase, mastoparan, phospholipase A1, phospholipase A2, and venom allergen 5) showed extremely high expression levels in social wasps. Acid phosphatase, neprilysin, and tachykinin, which are known allergens and neurotoxic peptides, were found in the venom glands of solitary wasps more often than in social wasps. In the venom glands of bumblebees, few or no transcripts of major allergens or pain-producing factors were identified. Taken together, these results indicate that differential expression patterns of the venom genes in some Aculeate species imply that some wasps and bumblebee species have unique groups of highly expressed venom components. Some venom components reflected the Aculeate species phylogeny, but others did not. This unique evolution of specific venom components in different groups of some wasps and bumblebee species might have been shaped in response to both ecological and behavioral influences.
8
Mendonça, Angelica, Rafaella Caroline Bernardi, Ellen Liciane Barbosa Firmino, Luis Humberto da Cunha Andrade, Sandro Marcio Lima, Wedson Desidério Fernandes e William Fernando Antonialli Junior. "Evaluation of Inter and Intraspecific Differences in the Venom Chemical Compositions of Polybia paulista Wasps and Ectatomma brunneum Ants Using FTIR-PAS". Sociobiology 66, n.º 3 (14 de novembro de 2019): 515. http://dx.doi.org/10.13102/sociobiology.v66i3.4308.
Texto completo da fonteResumo:
Wasps can synthesize chemical compounds called venom whose function is to overcome prey and assist in defense of the colonies. Geographic Parameters such as sex, age, the season of the year, and diet determined the composition of the venom location, genetics, environment. However, studies on the compositional variability of venom are still limited due to the difficulty in obtaining samples and the complexity of these substances. This work describes the use of the Fourier Transform Infrared Photoacoustic Spectroscopy (FTIR-PAS) to investigate inter- and intraspecific variability in the venom chemical composition (VCC) of the social wasp Polybia paulista (Von Ihering 1896) and the ant Ectatomma brunneum (Smith 1858). The results reveal significant differences in VCC among the ant and wasp, even for samples obtained from the same environment. The genetic component, therefore, seemed to be the predominant factor determining the compounds present. The findings also showed that exogenous factors, such as diet, could also be responsible for intraspecific differences, especially in wasps. The FTIR-PAS technique proved to be a reliable way of assessing intra- and interspecific differences in social Hymenoptera VCC.
9
Shimizu, Toshiaki, Yoshiko Tatsuki e Naokuni Takeda. "Aromatic Amino Acids in the Venom of the Braconid Parasitoid Apanteles kariyai". Zeitschrift für Naturforschung C 48, n.º 1-2 (1 de fevereiro de 1993): 108–9. http://dx.doi.org/10.1515/znc-1993-1-220.
Texto completo da fonteResumo:
The venom gland of the braconid parasitoid, Apanteles kariyai, was morphologically observed with photomicroscope and aromatic amino acids in its venom fluid were chemically analyzed with a three-dimensional HPLC svstem-coulometric ECD. Tyrosine (TYR-4) → tyramine (TYRA) → hydroxyphenylacetic acid (HPAC-4) and tryptophan (TRP) → kynurenine (KYN) were the detected metabolic pathways. This report of venom components of a braconid wasp outlines qualitative differences between this and venom from social wasps.
10
Harrop, Thomas W. R., Joseph Guhlin, Gemma M. McLaughlin, Elizabeth Permina, Peter Stockwell, Josh Gilligan, Marissa F. Le Lec et al. "High-Quality Assemblies for Three Invasive Social Wasps from the Vespula Genus". G3: Genes|Genomes|Genetics 10, n.º 10 (28 de agosto de 2020): 3479–88. http://dx.doi.org/10.1534/g3.120.401579.
Texto completo da fonteResumo:
Social wasps of the genus Vespula have spread to nearly all landmasses worldwide and have become significant pests in their introduced ranges, affecting economies and biodiversity. Comprehensive genome assemblies and annotations for these species are required to develop the next generation of control strategies and monitor existing chemical control. We sequenced and annotated the genomes of the common wasp (Vespula vulgaris), German wasp (Vespula germanica), and the western yellowjacket (Vespula pensylvanica). Our chromosome-level Vespula assemblies each contain 176–179 Mb of total sequence assembled into 25 scaffolds, with 10–200 unanchored scaffolds, and 16,566–18,948 genes. We annotated gene sets relevant to the applied management of invasive wasp populations, including genes associated with spermatogenesis and development, pesticide resistance, olfactory receptors, immunity and venom. These genomes provide evidence for active DNA methylation in Vespidae and tandem duplications of venom genes. Our genomic resources will contribute to the development of next-generation control strategies, and monitoring potential resistance to chemical control.
Teses / dissertações sobre o assunto "Social wasps venoms"
1
Saidemberg, Daniel Menezes [UNESP]. "Bioprospecção e caracterização químico-funcional de compostos orgânicos da baixas massas molecularesde venenos das vespas sociais: Agelaia pallipes pallipes, Agelaia vicina e Polybia paulista (Hymenoptera - Vespidae)". Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/100562.
Texto completo da fonteResumo:
Made available in DSpace on 2014-06-11T19:30:56Z (GMT). No. of bitstreams: 0
Previous issue date: 2009-12-07Bitstream added on 2014-06-13T19:19:44Z : No. of bitstreams: 1
saidemberg_dm_dr_rcla.pdf: 1615145 bytes, checksum: 92ac7814050532bc681c040810a6efc1 (MD5)Consideráveis esforços estão sendo feitos no sentido de isolar e identificar compostos neuroativos presentes em secreções de Artrópodes, resultando na descoberta de muitos peptídeos e moléculas pequenas com ação bloqueadora de receptores de glutamato e/ou canais de cálcio. Tendo isso em vista, a secreção de muitos desses animais tornaram-se ferramentas úteis para os estudos fisiológicos de diversas funções neurais, e muitos dos compostos neurotóxicos produzidos por suas secreções agressivas/defensivas podem se tornar modelos estruturais e funcionais para o desenvolvimento racional de agentes neuroprotetores para diversas desordens neurológicas. Assim, os venenos das vespas Agelaia pallipes pallipes, Agelaia vicina e Polybia paulista foram fracionados em HPLC, e as frações puras, mais abundantes, foram investigadas por espectrometria de massas e ressonância magnética nuclear para elucidação estrutural das mesmas; e posteriormente, estas frações foram submetidas a diversos ensaios para a determinação de suas atividades biológicas, principalmente daquelas atividades relacionadas à neurotoxicidade/ neuroproteção, tanto em artrópodes como em mamíferos. Através desta abordagem foi possível identificar alguns dos compostos de baixas massas moleculares mais abundantes nos venenos das vespas sociais citadas acima, como a Histamina, a Serotonina, que são comuns a todos estes venenos e possuem como principal função, a potencialização da dor e inflamação, além de outros efeitos no SNC de vertebrados. Também foi isolado um novo tripeptídeo de sequência Gly-Leu-Leu-OH a partir do veneno da vespa A. vicina, cuja função ainda não é conhecida e a síntese e ensaios biológicos do mesmo serão realizados em algumas ramificações dessa tese. A partir do veneno da vespa P. paulista foi isolada 2-feniletilamina, um composto...
Considerable research efforts have been mounted to isolate and identify neuroactive compounds in Arthropods secretions, resulting in the discovery of many peptides and small molecules which block glutamate receptors and/or calcium channels. Thus, the secretion of many of these animals proved to be useful tools for physiological studies of neuronal function, and several of the neurotoxic compounds produced by their defensive/aggressive secretions may become structural and functional models for the rational development of neuroprotective agents for different neurological disorders. Thus, the venoms of Agelaia pallipes pallipes, Agelaia vicina e Polybia paulista were fractionated in a HPLC system, and the most abundant and pure fractions were investigated by Mass Spectrometry and Nuclear Magnetic Resonance for structural elucidation, and then, these compounds were assayed for biological activity determination, focusing the neuronal activities for these compounds, both in Arthropods and mammals. Considering this approach, it was possible to identify some of the most low molecular mass compounds in the venoms of the social wasps cited above, such as: Histamine and Serotonin, which were common to all of these species, presenting as main function to increase the pain and inflammation, in addition to other effects in the CNS of vertebrates. It was also isolated from the venom of the wasp A. vicina a new tripetide which had its sequence determined as Gly-Leu-Leu- OH, and whose function has not been determined. From the venom of the wasp P. paulista it was isolated 2-phenylethylamine, an amphetamine-like compound, whose occurrence is uncommon in animal venoms, and which has stimulatory effects on the CNS primarily related to dopaminergic neurotransmission. It caused effects of paralysis on Africanized bees, probably by hyper-excitability in the CNS of this organism. We have also observed locomotor... (Complete abstract click electronic access below)
2
Saidemberg, Daniel Menezes. "Bioprospecção e caracterização químico-funcional de compostos orgânicos da baixas massas molecularesde venenos das vespas sociais : Agelaia pallipes pallipes, Agelaia vicina e Polybia paulista (Hymenoptera - Vespidae) /". Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/100562.
Texto completo da fonteResumo:
Orientador: Mario Sergio PalmaBanca: Emanuel Carrilho
Banca: Dulce Helena Siqueira Silva
Banca: Roberta Cornello Ferreira Nocelli
Banca: Maria Elena de Lima Perez Garcia
Resumo: Consideráveis esforços estão sendo feitos no sentido de isolar e identificar compostos neuroativos presentes em secreções de Artrópodes, resultando na descoberta de muitos peptídeos e moléculas pequenas com ação bloqueadora de receptores de glutamato e/ou canais de cálcio. Tendo isso em vista, a secreção de muitos desses animais tornaram-se ferramentas úteis para os estudos fisiológicos de diversas funções neurais, e muitos dos compostos neurotóxicos produzidos por suas secreções agressivas/defensivas podem se tornar modelos estruturais e funcionais para o desenvolvimento racional de agentes neuroprotetores para diversas desordens neurológicas. Assim, os venenos das vespas Agelaia pallipes pallipes, Agelaia vicina e Polybia paulista foram fracionados em HPLC, e as frações puras, mais abundantes, foram investigadas por espectrometria de massas e ressonância magnética nuclear para elucidação estrutural das mesmas; e posteriormente, estas frações foram submetidas a diversos ensaios para a determinação de suas atividades biológicas, principalmente daquelas atividades relacionadas à neurotoxicidade/ neuroproteção, tanto em artrópodes como em mamíferos. Através desta abordagem foi possível identificar alguns dos compostos de baixas massas moleculares mais abundantes nos venenos das vespas sociais citadas acima, como a Histamina, a Serotonina, que são comuns a todos estes venenos e possuem como principal função, a potencialização da dor e inflamação, além de outros efeitos no SNC de vertebrados. Também foi isolado um novo tripeptídeo de sequência Gly-Leu-Leu-OH a partir do veneno da vespa A. vicina, cuja função ainda não é conhecida e a síntese e ensaios biológicos do mesmo serão realizados em algumas ramificações dessa tese. A partir do veneno da vespa P. paulista foi isolada 2-feniletilamina, um composto... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Considerable research efforts have been mounted to isolate and identify neuroactive compounds in Arthropods secretions, resulting in the discovery of many peptides and small molecules which block glutamate receptors and/or calcium channels. Thus, the secretion of many of these animals proved to be useful tools for physiological studies of neuronal function, and several of the neurotoxic compounds produced by their defensive/aggressive secretions may become structural and functional models for the rational development of neuroprotective agents for different neurological disorders. Thus, the venoms of Agelaia pallipes pallipes, Agelaia vicina e Polybia paulista were fractionated in a HPLC system, and the most abundant and pure fractions were investigated by Mass Spectrometry and Nuclear Magnetic Resonance for structural elucidation, and then, these compounds were assayed for biological activity determination, focusing the neuronal activities for these compounds, both in Arthropods and mammals. Considering this approach, it was possible to identify some of the most low molecular mass compounds in the venoms of the social wasps cited above, such as: Histamine and Serotonin, which were common to all of these species, presenting as main function to increase the pain and inflammation, in addition to other effects in the CNS of vertebrates. It was also isolated from the venom of the wasp A. vicina a new tripetide which had its sequence determined as Gly-Leu-Leu- OH, and whose function has not been determined. From the venom of the wasp P. paulista it was isolated 2-phenylethylamine, an amphetamine-like compound, whose occurrence is uncommon in animal venoms, and which has stimulatory effects on the CNS primarily related to dopaminergic neurotransmission. It caused effects of paralysis on Africanized bees, probably by hyper-excitability in the CNS of this organism. We have also observed locomotor... (Complete abstract click electronic access below)
Doutor
3
Aguiar, Marisa Barbosa de. "Estudo estrutural por RMN do peptídeo policatiônico polybine I de veneno da vespa social Polybia paulista /". São José do Rio Preto : [s.n.], 2006. http://hdl.handle.net/11449/87528.
Texto completo da fonteResumo:
Orientador: Valmir FadelBanca: Claudia Munte
Banca: João Ruggiero Neto
Resumo: Os venenos de vespas socias são ricos em peptídeos biologicamente ativos que causam alguns males ao ser humano como: dores prolongadas, edema, eritema, reações alérgicas e sistêmicas. Possuem em sua composição vários tipos de aminas biogênicas, peptídeos e proteínas. Dentre eles, o que chama mais atenção na atividade farmacológica do veneno são os peptídeos policatiônicos. São diversas as atividades desses peptídeos como: neurotoxicidade, hemólise, liberação de histamina de mastócitos e antibatericida. Neste trabalho, foram estudados peptídeos catiônicos da família Polybine, sintetizados pelo Departamento de Biologia, Unesp, Rio Claro-SP. Os peptídeos Polybine I e II foram sintetizados na forma acetilada e não-acetilada para o estudo detalhado da sua estrutura. Com este objetivo, utilizamos as técnicas de Dicroísmo Circular (CD), para uma análise da estrutura secundária da amostra e espectroscopia de Ressonância Magnética Nuclear (RMN) para o estudo da estrutura tridimensional do peptídeo em solução.
Abstract: Social wasp venoms are rich of biologically active peptides that may cause some malady to human such as prolonged pains, edema, erythema, allergies and systemic reactions. They have, in its composition, many kinds of biogenic amines, series of polycationics peptides and proteins. Among them, the most interesting thing in pharmacological activity are the polycationics peptides. These peptides show several activities like neurotoxicity, hemolytic activity, histamine releasing activity and antimicrobial activity. In this project, cationic peptides of the Polybine family synthesized by the Department of Biology, CEIS/IBRC, UNESP, Rio Claro, SP were studied. The cationic peptides Polybine I and II were synthesized in acetylad and non-acetylad forms to the detailed study of the structure. This way, CD spectroscopy were performed to analyze secondary structure of the sample and, to analyze treedimension structure, NMR spectroscopy were used.
Mestre
4
Aguiar, Marisa Barbosa de [UNESP]. "Estudo estrutural por RMN do peptídeo policatiônico polybine I de veneno da vespa social Polybia paulista". Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/87528.
Texto completo da fonteResumo:
Made available in DSpace on 2014-06-11T19:22:55Z (GMT). No. of bitstreams: 0
Previous issue date: 2006-06-09Bitstream added on 2014-06-13T19:47:18Z : No. of bitstreams: 1
aguiar_mb_me_sjrp.pdf: 1374388 bytes, checksum: 3f0881d7dfbe0cb771b8a1ffb4572604 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Os venenos de vespas socias são ricos em peptídeos biologicamente ativos que causam alguns males ao ser humano como: dores prolongadas, edema, eritema, reações alérgicas e sistêmicas. Possuem em sua composição vários tipos de aminas biogênicas, peptídeos e proteínas. Dentre eles, o que chama mais atenção na atividade farmacológica do veneno são os peptídeos policatiônicos. São diversas as atividades desses peptídeos como: neurotoxicidade, hemólise, liberação de histamina de mastócitos e antibatericida. Neste trabalho, foram estudados peptídeos catiônicos da família Polybine, sintetizados pelo Departamento de Biologia, Unesp, Rio Claro-SP. Os peptídeos Polybine I e II foram sintetizados na forma acetilada e não-acetilada para o estudo detalhado da sua estrutura. Com este objetivo, utilizamos as técnicas de Dicroísmo Circular (CD), para uma análise da estrutura secundária da amostra e espectroscopia de Ressonância Magnética Nuclear (RMN) para o estudo da estrutura tridimensional do peptídeo em solução.
Social wasp venoms are rich of biologically active peptides that may cause some malady to human such as prolonged pains, edema, erythema, allergies and systemic reactions. They have, in its composition, many kinds of biogenic amines, series of polycationics peptides and proteins. Among them, the most interesting thing in pharmacological activity are the polycationics peptides. These peptides show several activities like neurotoxicity, hemolytic activity, histamine releasing activity and antimicrobial activity. In this project, cationic peptides of the Polybine family synthesized by the Department of Biology, CEIS/IBRC, UNESP, Rio Claro, SP were studied. The cationic peptides Polybine I and II were synthesized in acetylad and non-acetylad forms to the detailed study of the structure. This way, CD spectroscopy were performed to analyze secondary structure of the sample and, to analyze treedimension structure, NMR spectroscopy were used.
5
Baptista-Saidemberg, Nicoli Barão [UNESP]. "Análise peptidômica dos venenos de vespas sociais neotropicais". Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/100537.
Texto completo da fonteResumo:
Made available in DSpace on 2014-06-11T19:30:55Z (GMT). No. of bitstreams: 0
Previous issue date: 2011-02-25Bitstream added on 2014-06-13T18:41:08Z : No. of bitstreams: 1
baptistasaidemberg_nb_dr_rcla.pdf: 2299823 bytes, checksum: f0d4fcfb7ac2f2634065f5dff821690c (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Os peptídeos possuem um papel essencial para as funções fisiológicas de animais, plantas e de alguns microrganismos, e frequêntemente apresentam-se como candidatos a novas drogas na sua forma natural, servindo como modelos para o “desenho” de peptídeos modificados, para uma obtenção de perfis farmacológicos melhores. Neste contexto, os venenos das vespas sociais são interessantes sob o ponto de vista da pesquisa, uma vez que são ricos em peptídeos policatiônicos envolvidos com processos inflamatórios (lise de membranas, Desgranulação de mastócitos, quimiotaxia, entre outros processos), além de efeitos antibióticos contra bactérias Gram-positivas e Gram-negativas. Com base nisso, o objetivo deste trabalho foi realizar uma bioprospecção dos diferentes componentes peptídicos presentes nos venenos das vespas sociais Agelaia pallipes pallipes e Agelaia vicina, através da identificação e da caracterização estrutural e funcional dos componentes peptídicos mais abundantes destes venenos. Para isso, os venenos das vespas supracitadas foram extraidos em acetonitrila, fracionados por cromatografia de fase reversa e analisado por espectrometria de massas (ESI-MS e ESI-MSn). Todos os peptídeos caracterizados foram sintetizados manualmente por estratégia Fmoc, para a realização de ensaios farmacológicos e fisiológicos. Além de abrir novas vertentes de estudos estruturais e funcionais, o presente projeto alcançou os objetivos inicialmente almejados, identificando e caracterizando estruturalmente doze peptídeos presentes nos venenos das duas espécies de vespas. As denominações e atividades biológicas dessas moléculas foram: Protonectina apresentou-se lítico para hemáceas, degranulador de leucócitos quimiotático, induziu o fenômeno de hiperalgesia e foi edematogênico; o peptídeo Protonectina (1-4)-OH apresentou-se hemolítico para eritrócitos e desgranulador...
Peptides have an important role on physiologic functions of animals, plants and microorganisms. These natural peptides frequently are candidates for new drugs natural, and are used as models for the construction of modificated peptides in order to improve their pharmacological activities. From academic point of view, social wasp venoms are interesting once they are rich in policationic and polifunctional peptides that are involved with inflammatory processes (membrane lyses, mast cell degranulation, chemotaxis, and other processes), antimicrobial effects against Gram-positive and Gram-negative bacterias. Therefore, the main objective of this study was to bioprospect a diversity of peptidic compounds from the venoms of the neotropical social wasps Agelaia pallipes pallipes and Agelaia vicina through peptidomic analysis, identifying and characterizing these molecules structurally and functionally. For that, the venom from both wasps was extracted in MeCN 50% (v/v), analyzed and sequenced by ESI-MS, ESI-MSn. All characterized peptides were manually synthesized by Fmoc strategy and used for pharmacological and phisiological activities. This work has reached the initially poposed objectives by the indentification and functional characterization of twelve peptides from the social wasps venoms studied. Of these identified molecules, nine were isolated from the social wasp A. p. pallipes venom (Protonectin (1-4)-OH, Protonectin (1-5)-OH, Protonectin (1-6)-OH, Protonectin (7-12); Agelaia MP-I, Agelaia MP-II, Pallipin-I, Pallipin-II, and Pallipin-III), and from the venom of the social wasp A. vicina, four peptides were characterized (Protonectin (7-9)-OH, Protonectin, Protonectin (1-6), and Agelaia MP-I). These results show that the venom of both wasps are very similar to each other, probably due to the kinship of such species. Functionally, the peptide protonectin is lytic to erythrocytes... (Complete abstract click electronic access below)
6
Baptista-Saidemberg, Nicoli Barão. "Análise peptidômica dos venenos de vespas sociais neotropicais /". Rio Claro : [s.n.], 2011. http://hdl.handle.net/11449/100537.
Texto completo da fonteResumo:
Orientador: Mario Sergio PalmaBanca: Luiz Alberto Beraldo de Moraes
Banca: Dulce Helena Siqueira Silva
Banca: Everardo Magalhães Carneiro
Banca: Yara Cury
Resumo: Os peptídeos possuem um papel essencial para as funções fisiológicas de animais, plantas e de alguns microrganismos, e frequêntemente apresentam-se como candidatos a novas drogas na sua forma natural, servindo como modelos para o "desenho" de peptídeos modificados, para uma obtenção de perfis farmacológicos melhores. Neste contexto, os venenos das vespas sociais são interessantes sob o ponto de vista da pesquisa, uma vez que são ricos em peptídeos policatiônicos envolvidos com processos inflamatórios (lise de membranas, Desgranulação de mastócitos, quimiotaxia, entre outros processos), além de efeitos antibióticos contra bactérias Gram-positivas e Gram-negativas. Com base nisso, o objetivo deste trabalho foi realizar uma bioprospecção dos diferentes componentes peptídicos presentes nos venenos das vespas sociais Agelaia pallipes pallipes e Agelaia vicina, através da identificação e da caracterização estrutural e funcional dos componentes peptídicos mais abundantes destes venenos. Para isso, os venenos das vespas supracitadas foram extraidos em acetonitrila, fracionados por cromatografia de fase reversa e analisado por espectrometria de massas (ESI-MS e ESI-MSn). Todos os peptídeos caracterizados foram sintetizados manualmente por estratégia Fmoc, para a realização de ensaios farmacológicos e fisiológicos. Além de abrir novas vertentes de estudos estruturais e funcionais, o presente projeto alcançou os objetivos inicialmente almejados, identificando e caracterizando estruturalmente doze peptídeos presentes nos venenos das duas espécies de vespas. As denominações e atividades biológicas dessas moléculas foram: Protonectina apresentou-se lítico para hemáceas, degranulador de leucócitos quimiotático, induziu o fenômeno de hiperalgesia e foi edematogênico; o peptídeo Protonectina (1-4)-OH apresentou-se hemolítico para eritrócitos e desgranulador... (resumo completo, clicar acesso eletrônico abaixo)
Abstract: Peptides have an important role on physiologic functions of animals, plants and microorganisms. These natural peptides frequently are candidates for new drugs natural, and are used as models for the construction of modificated peptides in order to improve their pharmacological activities. From academic point of view, social wasp venoms are interesting once they are rich in policationic and polifunctional peptides that are involved with inflammatory processes (membrane lyses, mast cell degranulation, chemotaxis, and other processes), antimicrobial effects against Gram-positive and Gram-negative bacterias. Therefore, the main objective of this study was to bioprospect a diversity of peptidic compounds from the venoms of the neotropical social wasps Agelaia pallipes pallipes and Agelaia vicina through peptidomic analysis, identifying and characterizing these molecules structurally and functionally. For that, the venom from both wasps was extracted in MeCN 50% (v/v), analyzed and sequenced by ESI-MS, ESI-MSn. All characterized peptides were manually synthesized by Fmoc strategy and used for pharmacological and phisiological activities. This work has reached the initially poposed objectives by the indentification and functional characterization of twelve peptides from the social wasps venoms studied. Of these identified molecules, nine were isolated from the social wasp A. p. pallipes venom (Protonectin (1-4)-OH, Protonectin (1-5)-OH, Protonectin (1-6)-OH, Protonectin (7-12); Agelaia MP-I, Agelaia MP-II, Pallipin-I, Pallipin-II, and Pallipin-III), and from the venom of the social wasp A. vicina, four peptides were characterized (Protonectin (7-9)-OH, Protonectin, Protonectin (1-6), and Agelaia MP-I). These results show that the venom of both wasps are very similar to each other, probably due to the kinship of such species. Functionally, the peptide protonectin is lytic to erythrocytes... (Complete abstract click electronic access below)
Doutor