Search results for " Anima"
showing 10 items of 3536 documents
Hard to catch: Experimental evidence supports evasive mimicry
2021
Most research on aposematism has focused on chemically defended prey, but the signalling difficulty of capture remains poorly explored. Similar to classical Batesian and Müllerian mimicry related to distastefulness, such ‘evasive aposematism' may also lead to convergence in warning colours, known as evasive mimicry. A prime candidate group for evasive mimicry areAdelphabutterflies, which are agile insects and show remarkable colour pattern convergence. We tested the ability of naive blue tits to learn to avoid and generalizeAdelphawing patterns associated with the difficulty of capture and compared their response to that of birds that learned to associate the same wing patterns with distast…
Aspetti della produzione dei piccoli ruminanti con impatto sulla salute umana
2011
Negli ultimi anni l’attenzione del consumatore si è sempre più orientata verso le caratteristiche nutrizionali degli alimenti. Queste proprietà sono di grande importanza anche per quanto riguarda le produzioni dei piccoli ruminanti. Il presente lavoro ha lo scopo di riassumere i principali risultati emersi dal progetto di ricerca “Aspetti della produzione dei piccoli ruminanti con particolare impatto sulla salute umana”. Sono stati analizzati mediante i metodi descritti in letteratura: 1) i polimorfismi genetici dei biopeptidi del latte dei piccoli ruminanti; 2) le attività di alcuni enzimi della membrana del globulo di grasso e la frazione lipidica del latte ovino; 3) la qualità nutriziona…
Motherhood‐induced gene expression in the mouse medial amygdala: Changes induced by pregnancy and lactation but not by pup stimuli
2021
During lactation, adult female mice display aggressive responses toward male intrud-ers, triggered by male- derived chemosensory signals. This aggressive behavior is not shown by pup- sensitized virgin females sharing pup care with dams. The genetic mechanisms underlying the switch from attraction to aggression are unknown. In this work, we investigate the differential gene expression in lactating females ex-pressing maternal aggression compared to pup- sensitized virgin females in the me-dial amygdala (Me), a key neural structure integrating chemosensory and hormonal information. The results showed 197 genes upregulated in dams, including genes encoding hormones such as prolactin, growth h…
The reactivity of neonatal rabbits to the mammary pheromone as a probe for viability
2012
International audience; Newborn rabbits depend on a daily nursing interaction with the mother to gain milk and to survive. During this interaction, they localise and seize the nipples displaying a typical behaviour triggered by maternal odour cues. The mammary pheromone constitutes such a signal in domestic rabbits: it elicits sucking-related movements in more than 90% of the pups. However, some newborns remain unresponsive to the presentation of the pheromone, even pups apparently healthy and highly motivated to suck. The main goal of the present study was therefore to explore the link between the unresponsiveness of rabbit pups to the mammary pheromone and their growth and survival in bre…
Physical inactivity increases oxidative stress, endothelial dysfunction, and atherosclerosis.
2005
Objective— Sedentary lifestyle is associated with increased cardiovascular events. The underlying molecular mechanisms are incompletely understood. Reactive oxygen species (ROS) contribute to endothelial dysfunction and atherosclerosis. An important source of vascular ROS is the NADPH oxidase. Methods and Results— C57BL6 mice were subjected to regular housing (physical inactivity) or voluntary training on running wheels (6 weeks). Inactivity increased vascular lipid peroxidation to 148±9% and upregulated superoxide release to 176±17% (L-012 chemiluminescence) and 188±29% (cytochrome C reduction assay), respectively. ROS production was predominantly increased in the endothelium and the medi…
Chiens chez Modiano: análisis interdisciplinar de la representación animal en su obra
2017
Más que por un animalismo strictu sensu, la obra de Patrick Modiano se caracteriza por un profundo animalismo latente, en consonancia con una escritura minimalista marcada por la atenuación y por la poética de la ambigüedad. La investigación desvela cómo los cuentos de Marcel Aymé aportan a su imaginario de lector infantil un mundo en el que los animales viven y dialogan con una pareja de hermanas con las que el pequeño Modiano se identifica junto a Rudy, su hermano pequeño. Los accidentes que sufrieron dos perros con los que Modiano tuvo relación de niño le hicieron percibir una experiencia de la muerte, que precedió al trauma de la temprana desaparición de Rudy. A la influencia de Aymé se…
Laser guns and hot plates
2005
Papel de la fosforilación de p27 en la serina 10 en la función endotelial y el remodelado vascular patológico
2015
El supresor tumoral p27 ha sido ampliamente implicado en multitud de procesos patológicos donde ejerce un papel protector debido a su acción antiproliferativa. Particularmente, a nivel cardiovascular, nuestro laboratorio ha demostrado que p27 protege frente al desarrollo de aterosclerosis en modelos murinos gracias a su función anti-proliferativa (1, 2). La regulación de p27 está fuertemente mediada por sus modificaciones postraduccionales, entre las que destaca su fosforilación en la serina 10 (principal modificación que sufre la proteína). Recientemente, nuestro laboratorio ha demostrado que la fosforilación de p27 en su Ser10 protege frente al desarrollo de aterosclerosis avanzada, incre…
In groppa all’asino, diretti verso l’ignoto
2018
L'articolo affronta il tema del rapporto uomo natura attraverso la relazione con gli animali e si sofferma sul significato simbolico dell'asino, approfondendo e motivando le valenze terapeutiche della relazione uomo-asino e confrontandola, sempre in chiave simbolica, con la relazione analista paziente. The article deals with the theme of the relationship between human beings and natural world through the relationship with animals , and focuses on the symbolic meaning of the donkey, deepening and motivating the therapeutic value of human beings-donkey relationship and comparing it, always in a symbolic key, with the relationship between analyst and patient