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Food supplementation by an invasive fleshy-fruited shrub sustains body condition of a native frugivorous bird during winter

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Integrative Zoology 2019年第3期14卷 259-269页

作者： Tobias Nicolas ROJAS David Lautaro VERGARA-TABARES Diego Javier VALDEZ marina flavia ponzio Susana Inés PELUC Institute of Diversity and Animal Eology(IDEA-CONICET) National University of CórdobaCórdobaArgentina Institute of Health Science Research(INICSA-CONICET) Faculty of Medical SciencesNational University of CórdobaCórdobaArgentina Faculty of Exacts Physics and Nature SciencesNational University of CórdobaCórdobaArgentina Instituto de Ecología Regional(IER-CONICET) National University of TucumánTucumánArgentina.

Birds tend to adjust their behavior and physiology to changes in food availability in their ***al fluctuation of food resources may act as an energetic challenge,augmenting hypothalamus-pituitary-adrenal axis(HPA axis)activity,leading to an increase in corticosterone concentrations and promoting the metabolism of energy *** invasions may alter seasonal food fluctuations by providing a food supply during scarce *** could attenuate the energetic challenge,reducing HPA axis activity and the metabolism of *** a system with seasonal fluctuation in food availability,we tested if fruit supplementation by the invasive fleshy-fruited Pyracantha angustifolia during the season of native fruit scarcity decreases the consumption of energy stores through activity attenuation of the HPA *** measured changes in body condition and circulating corticosterone(CORT)concentration in Turdus chiguanco occurring at sites both invaded and not invaded by *** over 3 time periods that correspond to the periods prior to,during and after highest fruit production of the *** scarcity in the ecosystem appears as an energetic challenge for ***co,given that body mass,fat score and residuals of body mass/tarsus length decreased during winter in a site not invaded by the exotic ***,the presence of the invasive plant seemed to attenuate the metabolism of energetic reserves,as we did not record changes in body condition in birds inhabiting the invaded ***,plasma CORT concentration did not vary between sites or *** evaluation is required to elucidate how enhanced body condition,resulting from the consumption of a fleshy-fruited invasive plant,affects survivorship and reproductive performance in ***.

关键词： biological invasion energetic reserves food fluctuation frugivory plasma corticosterone

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Old game, new players: Linking classical theories to new trends in transplant immunology

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World Journal of Transplantation 2017年第1期7卷 1-25页

作者： marina Burgos da Silva flavia Franco da Cunha Fernanda Fernandes Terra Niels Olsen Saraiva Camara Department of Immunology Institute of Biomedical Sciences University of S?o Paulo Nephrology Division Department of Medicine Federal University of S?o Paulo Renal Pathophysiology Laboratory Faculty of Medicine University of S?o Paulo

The evolutionary emergence of an efficient immune system has a fundamental role in our survival against pathogenic attacks. Nevertheless, this same protective mechanism may also establish a negative consequence in the setting of disorders such as autoimmunity and transplant rejection. In light of the latter, although research has long uncovered main concepts of allogeneic recognition, immune rejection is still the main obstacle to long-term graft survival. Therefore, in order to define effective therapies that prolong graft viability, it is essential that we understand the underlying mediators and mechanisms that participate in transplant rejection. This multifaceted process is characterized by diverse cellular and humoral participants with innate and adaptive functions that can determine the type of rejection or promote graft acceptance. Although a number of mediators of graft recognition have been described in traditional immunology, recent studies indicate that defining rigid roles for certain immune cells and factors may be more complicated than originally conceived. Current research has also targeted specific cells and drugs that regulate immune activation and induce tolerance. This review will give a broad view of the most recent understanding of the allogeneic inflammatory/tolerogenic response and current insights into cellular and drug therapies that modulate immune activation that may prove to be useful in the induction of tolerance in the clinical setting.

关键词： Transplant immunology Immune rejection Inflammation Adaptive immunity Innate immunity Graft tolerance

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