Consulta: subjectFacets:"Venom gland"
Registros recuperados: 6
Data/hora: 10/06/2024 05:47:31

Venom Diversity and Evolution in the Most Divergent Cone Snail Genus Profundiconus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fassio, Giulia; Modica, Maria Vittoria; Mary, Lou; Zaharias, Paul; Fedosov, Alexander E.; Gorson, Juliette; Kantor, Yuri I.; Holford, Mandё; Puillandre, Nicolas.
Profundiconus is the most divergent cone snail genus and its unique phylogenetic position, sister to the rest of the family Conidae, makes it a key taxon for examining venom evolution and diversity. Venom gland and foot transcriptomes of Profundiconus cf. vaubani and Profundiconus neocaledonicus were de novo assembled, annotated, and analyzed for differential expression. One hundred and thirty-seven venom components were identified from P. cf. vaubani and 82 from P. neocaledonicus, with only four shared by both species. The majority of the transcript diversity was composed of putative peptides, including conotoxins, profunditoxins, turripeptides, insulin, and prohormone-4. However, there were also a significant percentage of other putative venom components...
Tipo: Text
Palavras-chave: Conidae; Conotoxins; Turripeptides; Transcriptome; Venom gland.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70155/68142.pdf

Histological aspects and protein content of Apis mellifera L. Worker venom glands: the effect of electrical shocks in summer and winter
Provedor de dados: Journal of Venomous Animals and Toxins
Autores: ABREU,R.M.M.; MORAES,R.L.M. SILVA de; MALASPINA,O.
This paper analyzes the summer and winter total protein content of 7, 14, 21, 28, 35, and 40-day old Apis mellifera L. worker venom glands before (control) and 24 and 96 hours after applying electrical shocks for venom extraction (experimental). During venom extraction, 7-day old workers responded more slowly and weakly to electrical shocks. This response intensifies with age, so that the workers approaching 20 days old respond faster and more aggressively to the shocks. Statistical analysis, using the non-parametric Wilcoxon and Kruskall-Wallis tests and complemented by the Jonckheere test, showed that the protein content varied from one age to another in the experimental group, which was well distinguishable from the values in the control Group in summer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bees; Histology; Protein content; Summer; Winter; Electrical shock; Venom gland; Apis mellifera.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000100006

Sequence analysis of the cDNA encoding for SpCTx: a lethal factor from scorpionfish venom ( Scorpaena plumieri )
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Costa,Fábio L. S.; Lima,Maria Elena De; Figueiredo,Suely G.; Ferreira,Rafaela S.; Prates,Núbia S.; Sakamoto,Tetsu; Salas,Carlos E.
Abstract  Background: Lethal factors are multifunctional oligomeric proteins found in the venomous apparatus of Scorpaeniformes fish. These toxins elicit not only an array of biological responses in vitro but also cardiovascular disorders and strong hemolytic, nociceptive and edematogenic activities in vivo. This work describes the cloning and molecular identification of two toxin subunits, denominated Sp-CTx-α and Sp-CTx-β, from scorpionfish venom ( Scorpaena plumieri ).  Methods: The primary structures were deduced after cDNA amplification by PCR with primers from conserved sequences described in Scorpaeniformes toxins. Following DNA sequencing and bioinformatic analysis, the tridimensional structures of both subunits were modeled.  Results: The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CDNA; Lethal factor; Scorpaena plumieri; Scorpionfish; Venom gland.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100315

The venom gland of the scorpion species Euscorpius mingrelicus (Scorpiones: Euscorpiidae): morphological and ultrastructural characterization
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Yigit,N; Benli,M.
The histology and ultrastructure of venom glands in the scorpion Euscorpius mingrelicus (Kessler, 1874) are described and illustrated in the current study for the first time by employing light microscopy and transmission electron microscopy (TEM). The venom apparatus is composed of a pair of venom glands and a stinger, both situated in the last segment of the metasoma. The venom glands are completely separate but similar. The two glands are segregated within the telson by striated muscle bundles, and their outer surfaces are surrounded by a cuticle. An internal layer constitutes the secretory epithelium. This epithelium is made up of simple columnar cells. The nucleus and organelles involved in cellular synthetic activity are situated basally. In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euscorpius mingrelicus; Scorpion; Telson; Venom gland; Histology; Ultrastructure.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000300007

Morphological characterization of the venom apparatus in the wolf spider Lycosa singoriensis (Laxmann, 1770)
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Yigit,N; Bayram,A; Danisman,T; Sancak,Z; Tel,MG.
The wolf spider Lycosa singoriensis (Laxmann, 1770) (Lycosidae: Araneae) is distributed throughout central and eastern Europe, including Russia, Kazakhistan and Turkey. This study describes the venom apparatus morphology of L. singoriensis through scanning electron microscopy (SEM). Its structure follows the general architecture observed in other spiders. Generally, a venom apparatus is composed by a pair of venom glands and chelicerae. L. singoriensis chelicerae are robust and consist of a stout basis and a movable apical segment (fang). The fang rests in a groove on the basal segment that is covered by different types of hair. L. singoriensis venom glands present equal size and measure about 4 mm in length. Each gland is enclosed by irregular muscular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spider; Lycosa singoriensis; Chelicerae; Venom gland; Morphology.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000100013

A Histological Study on Venom Apparatus of Montivipera xanthina (Gray, 1849) (Serpentes, Viperidae)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Kılıç,Dilara Çolak; Akat,Esra; Arıkan,Hüseyin.
ABSTRACT This is the first report describing morphological and histological structure of venom apparatus in Montivipera xanthina. The venom gland apparatus of M. xanthina was composed of four distinct parts, main venom gland, primary duct, accessory gland and secondary duct. The main venom gland was composed of acini. The accessory gland was formed by long and ramified tubules. Nine fangs were detected in one half of the upper jaw each at different stage of development. Only one tooth was functional and the eight remaining fangs form a replacement series. The venom apparatus of viperid snakes are the most effective venom-delivery system among vertebrates and have been the focus of scientific interests for many years. Despite this interest, there are few...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Montivipera xanthina; Venom gland; Fang; Dentine; Odontoblast.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100425