The interplay between ambient temperature and salt intake affects oxidative status and immune responses in a ubiquitous Neotropical passerine, the rufous-collared sparrow

Sabat, Pablo; Bozinovic, Francisco; Contreras-Ramos, Carolina; Nespolo, Roberto F.; Newsome, Seth D.; Quirici, Verónica; Maldonado, Karin; Peña-Villalobos, Isaac; Ramírez-Otárola, Natalia; Sánchez-Hernández, Juan C.

doi:10.1016/j.cbpa.2019.04.016

Cited by 10 publications

(12 citation statements)

References 81 publications

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“…COX and CS activities were measured using the methods described in Sabat et al . 31,37 . Enzyme activities are reported as specific activity per gram of protein (µmol min −1 mg protein −1 ).…”

Section: Methodsmentioning

confidence: 99%

Oxidative status and metabolic profile in a long-lived bird preparing for extreme endurance migration

Gutiérrez

Sabat

Castañeda

et al. 2019

Sci Rep

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The high metabolic activity associated with endurance flights and intense fuelling of migrant birds may produce large quantities of reactive oxygen species, which cause oxidative damage. Yet it remains unknown how long-lived birds prepare for oxidative challenges prior to extreme flights. We combined blood measurements of oxidative status and enzyme and fat metabolism in Hudsonian godwits (Limosa haemastica, a long-lived shorebird) before they embarked on non-stop flights longer than 10,000 km during their northbound migrations. We found that godwits increased total antioxidant capacity (TAC) and reduced oxidative damage (TBARS) as the pre-migratory season progressed, despite higher basal metabolic rates before departure. Elevations in plasma β-hydroxybutyrate and uric acid suggest that lipid and protein breakdown supports energetic requirements prior to migration. Significant associations between blood mitochondrial cytochrome-c oxidase and plasma TAC (negative) and TBARS (positive) during winter indicate that greater enzyme activity can result in greater oxidative damage and antioxidant responses. However enzyme activity remained unchanged between winter and premigratory stages, so birds may be unable to adjust metabolic enzyme activity in anticipation of future demands. These results indicate that godwits enhance their oxidative status during migratory preparation, which might represent an adaptation to diminish the physiological costs of long-distance migration.

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Section: Methodsmentioning

confidence: 99%

Oxidative status and metabolic profile in a long-lived bird preparing for extreme endurance migration

Gutiérrez

Sabat

Castañeda

et al. 2019

Sci Rep

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“…Gutiérrez et al, 2015), oxidative status (e.g. Sabat et al, 2017), body condition (Gutiérrez et al, 2011) and immunity (Gutiérrez et al, 2013;Sabat et al, 2019). Interestingly, corticosterone has been suggested as a central mediator of these physiological traits (reviewed in Sapolsky et al, 2000;Romero, 2004;Landys et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Short-term dehydration influences baseline, but not stress-induced corticosterone levels in the House sparrow (Passer domesticus)

Brischoux

Beaugeard

Mohring

et al. 2020

Journal of Experimental Biology

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Future environmental variations linked to climate change are expected to influence precipitation regimes and thus drinking water availability. Dehydration can be a particularly challenging physiological state for most organisms, yet no study has examined the effect of dehydration on the functioning of the hypothalamicpituitary-adrenal axis in wild endothermic animals, despite its central role in maintaining homeostasis. In this study, we experimentally imposed a temporary water shortage (∼20 h) on captive house sparrows in order to investigate the consequences of short-term dehydration on baseline and stress-induced corticosterone levels. As expected, water-deprived birds displayed higher plasma osmolality and haematocrit. Additionally, water-deprived birds had lower defecation rates, suggesting that the mechanisms allowing caecal water absorption may be triggered very rapidly during water deprivation. Baseline but not stress-induced corticosterone levels were higher in water-deprived birds. Taken together, these results suggest that water restriction may have critical consequences on several corticosterone-related traits such as energy budget (protein catabolism and possibly feeding reduction), enhanced mobility (to promote water acquisition) and potential responses to predators (thirst threshold overriding the acute stress response). Owing to the possible fitness consequences of such components of the day-today life of birds, further studies should aim at investigating the influence of future changes in precipitation regimes and drinking water availability on bird populations.

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“…Alternatively, several studies have reported that significant increases in metabolic rate can trigger ROS and therefore activate antioxidant defenses (Cohen, Hau, & Wikelski, 2008). Other studies suggest a functional relationship between mass‐specific metabolic rates and oxidative state (Fletcher et al, 2013; Sabat et al, 2017, 2019), although this association continues to be a subject of active debate (Jimenez, 2018; Selman et al, 2012; Speakman & Garratt, 2014). In particular, Speakman and Garratt (2014) proposed that the notion that ROS production is linked to metabolism in a fixed proportion is incorrect.…”

Section: Discussionmentioning

confidence: 99%

Effect of salinity acclimation on osmoregulation, oxidative stress, and metabolic enzymes in the invasive Xenopus laevis

et al. 2020

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Aquatic animals often display physiological adjustments to improve their biological performance and hydrosaline balance in saline environments. In addition to energetic costs associated with osmoregulation, oxidative stress, and the activation of the antioxidant system are common cellular responses to salt stress in many species, but the knowledge of osmoregulation-linked oxidative homeostasis in amphibians is scarce. Here we studied the biochemical responses and oxidative responses of Xenopus laevis females exposed for 40 days to two contrasting salinities: hypo-osmotic (150 mOsm·kg −1 ·H 2 O NaCl, HYPO group) and hyper-osmotic environments (340 mOsm·kg −1 ·H 2 O NaCl, HYPER group). We found an increase of plasma osmolality and plasma urea concentration in the animals incubated in the HYPER treatment.At the end of the acclimation, animals were euthanized by decapitation (Katz & Hanke, 1993), the organs were weighted and tissues (liver, heart, ventral skin, and leg muscle) were frozen at −80°C for further biochemical analysis. Blood was collected from heart using capillary tubes, then centrifuged at 12,000g for 5 min, and the plasma (8 µL) was used for osmolality measurement by vapor pressure osmometry (Wescor 5130B). The remained plasma was stored (−80°C) for further analyses. The urea concentration (mg/dl) was determined by the urease/Berthelot method using a commercial kit 334 | HIDALGO ET AL.

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The interplay between ambient temperature and salt intake affects oxidative status and immune responses in a ubiquitous Neotropical passerine, the rufous-collared sparrow

Cited by 10 publications

References 81 publications

Oxidative status and metabolic profile in a long-lived bird preparing for extreme endurance migration

Oxidative status and metabolic profile in a long-lived bird preparing for extreme endurance migration

Short-term dehydration influences baseline, but not stress-induced corticosterone levels in the House sparrow (Passer domesticus)

Effect of salinity acclimation on osmoregulation, oxidative stress, and metabolic enzymes in the invasive Xenopus laevis

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