| characterization of the skin microbiota in italian stream frogs (rana italica) infected and uninfected by a cutaneous parasitic disease. | in human and wildlife populations, the natural microbiota plays an important role in health maintenance and the prevention of emerging infectious diseases. in amphibians, infectious diseases have been closely associated with population decline and extinction worldwide. skin symbiont communities have been suggested as one of the factors driving the different susceptibilities of amphibians to diseases. the activity of the skin microbiota of amphibians against fungal pathogens, such as batrachochyt ... | 2015 | 26370166 |
| geographic distribution of the chytrid pathogen batrachochytrium dendrobatidis among mountain amphibians along the italian peninsula. | the amphibian chytrid pathogen batrachochytrium dendrobatidis (bd) is considered a major cause of amphibian population declines, particularly in montane areas. here, we investigated the presence and distribution of bd among populations of 3 mid- to high-altitude species spanning the entire italian peninsula (486 individuals from 39 sites overall): the stream frog rana italica, the fire salamander salamandra salamandra gigliolii, and the alpine newt mesotriton alpestris apuanus. we found bd in al ... | 2013 | 24270024 |
| different patterns of expression of five neuropeptides in the adrenal gland and kidney of two species of frog. | the aim of this study was to demonstrate in the adrenocortical and renal tissues of two species of frog, rana italica and rana esculenta, the presence and distribution of five neuropeptides: atrial natriuretic peptide (anp), leu-enkephalin (leu-enk), neuropeptide y (npy), substance p (sp) and vasoactive intestinal peptide (vip). in anurans, the adrenal medulla is the site for the synthesis, storage and secretion of not only catecholamines but also various peptides. these peptides should not be r ... | 2006 | 12365796 |
| cytotoxic peptides with insulin-releasing activities from skin secretions of the italian stream frog rana italica (ranidae). | peptidomic analysis of norepinephrine-stimulated skin secretions from italian stream frog rana italica led to the purification and characterization of two host-defense peptides differing by a single amino acid residue belonging to the brevinin-1 family (brevinin-1ita and -1itb), a peptide belonging to the temporin family (temporin-ita) and a component identified as prokineticin bv8. the secretions contained relatively high concentrations of the methionine-sulphoxide forms of brevinin-1ita and -1 ... | 2017 | 28699258 |
| climatic oscillations triggered post-messinian speciation of western palearctic brown frogs (amphibia, ranidae). | oscillating glacial cycles over the past 2.4 million years are proposed to have had a major impact on the diversity of contemporary species communities. we used mitochondrial and nuclear dna sequence data to infer phylogenetic relationships within western palearctic brown frogs and to test the influence of pliocene and pleistocene climatic changes on their evolution. we sequenced 1976bp of the mitochondrial genes 16s rrna and cytochrome b and of the nuclear rhodopsin gene for all current species ... | 2003 | 12565039 |
| intra-specific variability and unusual organization of the repetitive units in a satellite dna from rana dalmatina: molecular evidence of a new mechanism of dna repair acting on satellite dna. | we have characterized the s1 satellite from eight european populations of rana dalmatina by southern blot, cloning and a new method that determines the sequence variability of repetitive units in the genome. this report completes our previous studies on this satellite dna family, thus providing the first characterization of the overall variability of the structure and genomic organization of a satellite dna within a species and among related species. the s1 satellite from r. dalmatina has a peri ... | 2006 | 16956734 |
| population genetic structure and diversity of the apennine endemic stream frog, rana italica--insights on the pleistocene evolutionary history of the italian peninsular biota. | for most species in the western palaearctic region, southern mediterranean peninsulas have been identified as major quaternary refugia and hotspots of intraspecific diversity, and thus, as areas of particular relevance for the conservation of the evolutionary potential. we analysed the patterns of geographical variation among 26 populations of the italian stream frog, using both nuclear (allozymes) and mitochondrial (partial cytochrome b sequences) markers. phylogenetic, phylogeographical and po ... | 2008 | 18643880 |
| peptidomic analysis of the host-defense peptides in skin secretions of rana graeca provides insight into phylogenetic relationships among eurasian rana species. | peptidomic analysis of norepinephrine-stimulated skin secretions from the greek stream frog rana graeca boulenger, 1891 led to the identification and structural characterization of a range of host-defense peptides. these comprised brevinin-1gra, brevinin-1grb and an n-terminally extended form of brevinin-1grb, ranatuerin-2gr together with its oxidized form and (11-28) fragment, temporin-gra, temporin-grb and its non-amidated form, and a melittin-related peptide, mrp-gr and its (1-18) fragment. t ... | 2019 | 30599276 |
| developmental stages of amphibiocystidium sp., a parasite from the italian stream frog (rana italica). | amphibian parasites of the genus amphibiocystidium are members of the class ichthyosporea (=mesomycetozoea), within the order dermocystida. most of the species in the dermocystida fail to grow in ordinary culture media, so their life cycle has only been partially constructed by studies in host tissues. however, to date, there have been few reports on the life cycle of amphibiocystidium parasites with respect to the developmental life stages of both dermocystidium and rhinosporidium parasites. in ... | 2020 | 32623097 |
| longitudinal study of amphibiocystidium sp. infection in a natural population of the italian stream frog (rana italica). | mesomycetozoean-induced infections (order dermocystida, genus amphibiocystidium) in european and north american amphibians are causing alarm. to date, the pathogenicity of these parasites in field conditions has been poorly studied, and demographic consequences on amphibian populations have not been explored. in this study, an amphibiocystidium sp. infection is reported in a natural population of the italian stream frog (rana italica) of central italy, over a 7-year period from 2008 to 2014. lig ... | 2019 | 30816081 |