| presence of caerulein in extracts of the skin of leptodactylus pentadactylus labyrinthicus and of xenopus laevis. | 1. the south american amphibian leptodactylus pentadactylus labyrinthicus and the south african amphibian xenopus laevis contain in their skin a polypeptide indistinguishable from caerulein prepared from the australian amphibian hyla caerulea.2. the caerulein content of different batches of leptodactylus pentadactylus labyrinthicus skins varies from 10 to 500-600 mug/g tissue. drying of the skin causes either a moderate decrease or a slight increase in the caerulein content. methanol extraction ... | 1970 | 5413288 |
| pentadactylin: an antimicrobial peptide from the skin secretions of the south american bullfrog leptodactylus pentadactylus. | norepinephrine-stimulated skin secretions were obtained from male specimens of the south american bullfrog, leptodactylus pentadactylus and shown to contain two peptides that inhibited the growth of microorganisms. the primary structure of a previously undescribed peptide, termed pentadactylin, was established as gly-leu-leu-asp-thr-leu-lys-gly-ala-ala-lys-asn-val-val-gly-ser-leu-ala-ser-lys-val-met-glu-lys-leu.nh2. the second peptide, which differs from pentadactylin by eight amino acid residue ... | 2005 | 16236555 |
| first report of spontaneous chytridiomycosis in frogs in asia. | this is the first report of amphibian chytridiomycosis in asia. we discovered a lethal outbreak in japan, among 45 exotic frogs from 18 species kept for breeding by a private owner. of these 45 frogs, 16 died and another 7 were found to be infected by chytrid fungus batrachochytrium dendrobatidis (bd) but survived after treatment. bd was detected in frogs from 9 species (lepidobatrachus laevis, ceratophrys cornuta, c. cranwelli, c. ornata, c. calcarata, chacophrys pierotti, occidozyga lima, lept ... | 2008 | 19149379 |
| leptoglycin: a new glycine/leucine-rich antimicrobial peptide isolated from the skin secretion of the south american frog leptodactylus pentadactylus (leptodactylidae). | antimicrobial peptides are components of innate immunity that is the first-line defense against invading pathogens for a wide range of organisms. here, we describe the isolation, biological characterization and amino acid sequencing of a novel neutral glycine/leucine-rich antimicrobial peptide from skin secretion of leptodactylus pentadactylus named leptoglycin. the amino acid sequence of the peptide purified by rp-hplc (c(18) column) was deduced by mass spectrometric de novo sequencing and conf ... | 2009 | 19298834 |
| isolation and pharmacological effects of leptoxin, a novel proteic toxin from leptodactylus pentadactylus skin secretion. | the in vivo and in vitro pharmacological effects of leptoxin, one of the most lethal protein toxins known at present date (ld(50) 0.5+/-0.03 microg/kg i.v., mice) isolated from leptodactylus pentadactylus skin secretion, were studied. in rats, leptoxin (1.0 microg/kg, i.v.) induced cardiorespiratory collapse with abundant tracheal secretion followed by sudden death. the cardiovascular shock, pulmonary edema and mortality were not prevented by pretreating the animals with effective doses of pharm ... | 2009 | 19505492 |
| physiological responses to feeding, fasting and estivation for anurans. | anuran estivation is characterized by long episodes of aphagia. to investigate whether estivating anurans downregulate intestinal performance as an adaptive mechanism to reduce energy expenditure, i compared the metabolic and intestinal responses to feeding, fasting and estivation among non-estivating and estivating species of the anuran families bufonidae, leptodactylidae and ranidae. standard metabolic rates of the estivating bufo alvarius, ceratophrys ornata and pyxicephalus adspersus were si ... | 2005 | 15961745 |
| two new species of rhabdias stiles et hassall, 1905 (nematoda: rhabdiasidae) from anuran amphibians in pará, brazil. | two new lung-dwelling nematode species of the genus rhabdias stiles et hassall, 1905 were discovered in caxiuanã national forest, pará state, brazil. rhabdias galactonoti sp. n. was found in a dendrobatid frog adelphobates galactonotus (steindachner). the species is characterised by the regularly folded inner surface of the anterior part of the buccal capsule seen in apical view, flask-shaped oesophageal bulb and narrow, elongated tail. rhabdias stenocephala sp. n. from two species of leptodacty ... | 2016 | 27189518 |
| cytogenetic analyses of eight species in the genus leptodactylus fitzinger, 1843 (amphibia, anura, leptodactylidae), including a new diploid number and a karyotype with multiple translocations. | the karyotypes of leptodactylus species usually consist of 22 bi-armed chromosomes, but morphological variations in some chromosomes and even differences in the 2n have been reported. to better understand the mechanisms responsible for these differences, eight species were analysed using classical and molecular cytogenetic techniques, including replication banding with brdu incorporation. | 2012 | 23268622 |
| characterizing parameters of response to light intensity for six species of frogs. | a comparative study was made to characterize differences in intensity response by six anuran species: hyla cinerea, hyla gratiosa, rana catesbeiana, rana sylvatica, kassina senegalensis, and leptodactylus pentadactylus. considering the sigmoid intensity/response curve to represent a cumulative gaussian distribution gave a very good fit to the data, for both dark- and light-adapted animals. characterizing parameters from the regression to transformed data gave good distinctions between the specie ... | 1977 | 24896431 |
| a comparison of spectral response functions of positive and negative phototaxis in two anuran amphibians, rana pipiens and leptodactylus pentadactylus. | anuran (tailless) amphibians exhibit preferences for light; some species (photopositive) are attracted to light while others (photonegative) are repelled. the photopositive anuran rana pipiens and the photonegative anuran leptodactylus pentadactylus were tested in a y-maze on a light versus dark task where the 'light' stimuli were monochromatic and equated for energy. during each trial the window in one of the choice alleys of the y-maze was illuminated while the window in the other was dark. ph ... | 1995 | 7746507 |
| indole-, imidazole- and phenyl-alkylamines in the skin of one hundred and forty american amphibian species other than bufonids. | extracts prepared from dried or fresh skins of 140 american amphibian species, other than bufonids, were subjected to chemical and biological screening in order to determine the presence and concentrations of aromatic biogenic amines. the most frequent and abundantly occurring amine category was that of indolealkylamines, represented by their prototype 5-hydroxytryptamine and its n-methylated derivatives. conjugated and cyclized indolealkylamines, typical for the toad skin, were apparently lacki ... | 1986 | 2877780 |
| [plasma cholinesterase in bufo paracnemis and leptodactylus pentadactylus]. | | 1978 | 635244 |
| [antimicrobial activity of skin gland secretions of amphibians ii. substances from leptodactylus pentadactylus]. | | 1970 | 4395542 |
| generalized tuberculosis in a south american frog leptodactylus pentadactylus. | | 1966 | 6006163 |
| occurrence of candicine(p-hydroxyphenylethyltrimethylammonium) in extracts of the skin of leptodactylus pentadactylus pentadactylus. | | 1963 | 14078136 |
| occurrences of new imidazolealkylamines (spinaceamin and 6-methylspinaceamine) in skin extracts of leptodactylus pentadactylus labyrinthicus. | | 1963 | 14067762 |
| more sex chromosomes than autosomes in the amazonian frog leptodactylus pentadactylus. | heteromorphic sex chromosomes are common in eukaryotes and largely ubiquitous in birds and mammals. the largest number of multiple sex chromosomes in vertebrates known today is found in the monotreme platypus (ornithorhynchus anatinus, 2n = 52) which exhibits precisely 10 sex chromosomes. interestingly, fish, amphibians, and reptiles have sex determination mechanisms that do or do not involve morphologically differentiated sex chromosomes. relatively few amphibian species carry heteromorphic sex ... | 2018 | 29372309 |
| oswaldocruzia lanfrediae n. sp. (strongylida: molineidae), a parasite of leptodactylus paraensis heyer (anura: leptodactylidae) in brazil. | leptodactylus paraensis heyer, is a neotropical anuran species that inhabits rainforest habitats in the eastern amazon, but because it has only been recently separated from the leptodactylus pentadactylus (laurenti) species group, little is known about its helminth fauna. this study describes a new species of oswaldocruzia travassos, 1917 and records the first occurrence of this genus parasitising l. paraensis and the second species for the caxiuanã national forest in the eastern amazon, brazil. ... | 2018 | 30128687 |
| meiotic analyses show adaptations to maintenance of fertility in x1y1x2y2x3y3x4y4x5y5 system of amazon frog leptodactylus pentadactylus (laurenti, 1768). | heterozygous chromosomal rearrangements can result in failures during the meiotic cycle and the apoptosis of germline, making carrier individuals infertile. the amazon frog leptodactylus pentadactylus has a meiotic multivalent, composed of 12 sex chromosomes. the mechanisms by which this multi-chromosome system maintains fertility in males of this species remain undetermined. in this study we investigated the meiotic behavior of this multivalent to understand how synapse, recombination and epige ... | 2020 | 33004883 |
| polystoma knoffi n. sp. and polystoma travassosi n. sp. (monogenea: polystomatidae): naming museum-archived specimens from brazil. | in 1978, kohn and co-workers deposited several polystome (monogenea) specimens infecting several brazilian anurans [trachycephalus mesophaeus (hensel), t. nigromaculatus tschudi and leptodactylus pentadactylus (laurenti)] within the helminthological collection of the instituto oswaldo cruz, brazil. no specimen was formally described but we herein identified three morphotypes and formally describe two of them (polystoma knoffi n. sp. and p. tavassosi n. sp.). these are respectively the 12th and 1 ... | 2019 | 31713711 |
| immersion in tricaine methanesulfonate (ms-222) is not sufficient for euthanasia of smokey jungle frogs (leptodactylus pentadactylus). | although tricaine methanesulfonate (ms-222) immersion has historically been standard of care for fish and anuran euthanasia, recent research has proven it insufficient for euthanasia of goldfish. to assess appropriateness for humane euthanasia of anurans, this study evaluated the efficacy of ms-222 in smokey jungle frogs (leptodactylus pentadactylus). eighteen frogs (21-33 g) were exposed to one of three ms-222 concentrations via partial immersion: 2.5 g/l for 90 min (m2.5/90), 5 g/l for 60 min ... | 2019 | 31120666 |