The link between stress and feeding behaviour

Maniam, Jayanthi; Morris, Margaret J.

doi:10.1016/j.neuropharm.2012.04.017

Cited by 212 publications

(190 citation statements)

References 186 publications

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“…Differences on serum metabolites between divergent RFI groups It is well known that hormonal regulation plays a key role in feed intake and energy metabolism (Maniam and Morris, 2012). In our study, we found no significant difference between the high and low RFI groups in levels of cholecystokinin-octopeptide, insulin, GH, prolactin, ghrelin or IGF-1.…”

Section: Feeding Behaviors Between Divergent Rfi Groupscontrasting

confidence: 64%

Biological mechanisms related to differences in residual feed intake in dairy cows

Zhao

et al. 2016

Animal

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Residual feed intake (RFI), defined as the difference between an animal's actual feed intake and expected feed intake over a specific period, is an inheritable character of feed conversion efficiency in dairy cows. Research has shown that a lower RFI could improve the profitability of milk production. This study explored variation in RFI by comparing the differences in body size, milk performance, feeding behavior, and serum metabolites in 29 Holstein cows in mid lactation. The cows were selected from a total of 84 animals based on their RFI following feedlot tests. Selected cows were ranked into high RFI (RFI > 1 SD above the mean, n = 14) and low RFI (RFI < 1 SD below the mean, n = 15). The low RFI cows (more efficient) consumed 1.59 kg/day less dry matter than the high RFI group ( P < 0.01), while they produced nearly equal 4% fat-corrected milk. The milk : feed ratio was higher for the low RFI group than for the high RFI group ( P < 0.05). The levels of milk protein ( P < 0.01), total solids ( P < 0.05), and nonfat solids ( P < 0.05) were also higher for the low RFI group, whereas milk urea nitrogen was lower ( P < 0.01). The daily feeding duration was shorter for the low RFI group than for the high RFI group ( P < 0.01). No significant differences were found in levels of glucose, β-hydroxybutyrate, prolactin, insulin, IGF-1, growth hormone or ghrelin, but the level of neuropeptide Y was higher ( P < 0.01) and levels of leptin and non-esterified fatty acid ( P < 0.05) were lower for the low RFI group than for the high RFI group. There were substantial differences between cows with different RFI, which might affect the efficiency of milk protein metabolism and fat mobilization.

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Section: Feeding Behaviors Between Divergent Rfi Groupscontrasting

confidence: 64%

Biological mechanisms related to differences in residual feed intake in dairy cows

Zhao

et al. 2016

Animal

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“…This suggests that the inability to change feeding behaviour under threat may be associated with obesity rather than the nutritional components of the diet per se. An increase in food consumption by extended access rats during the aversive cue is not likely due to stress-induced feeding as restricted access rats suppress their feeding and typically stress-induced feeding responses occur after the animal has been removed from the stressor (Maniam and Morris, 2012).…”

Section: Discussionmentioning

confidence: 99%

Obesity-Induced Structural and Neuronal Plasticity in the Lateral Orbitofrontal Cortex

Thompson

Drysdale

Baimel

et al. 2017

Neuropsychopharmacol

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The orbitofrontal cortex (OFC) integrates sensory information with the current value of foods and updates actions based on this information. Obese humans and rats fed a cafeteria diet have impaired devaluation of food rewards, implicating a potential obesity-induced dysfunction of the OFC. We hypothesized that obesity alters OFC © 2016 Macmillan Publishers Limited. All rights reserved. 3pyramidal neuronal structure and function and reduces conditioned suppression of feeding. Rats were given restricted (1 h/day), extended (23 h/day) or no (chow only) access to a cafeteria diet and tested for a conditioned suppression of feeding. Golgicox impregnation and whole-cell patch clamp experiments were performed in lateral OFC pyramidal neurons of rats from the 3 feeding groups. Rats with 40 days of extended, but not restricted, access to a cafeteria diet became obese and continued to feed during foot shock-predicting cues. Access to a cafeteria diet induced morphological changes in basilar dendrites of lateral OFC pyramidal neurons. While there were no alterations in excitatory synaptic transmission underlying altered spine density, we observed a more depolarized resting membrane potential. This was accompanied by decreased inhibitory synaptic transmission onto lateral OFC pyramidal neurons due to decreased release probability at GABAergic inputs. These changes could underlie the inability of the OFC to encode changes in the motivation value of food that is observed in obese rodents and humans.

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“…It could be an outcome of the stress response elicited by the social instability and crowding, as demonstrated by the reduction of food intake and the size alteration of the zona glomerulosa of the adrenal cortex. Social instability and crowding are recognized environmental stressors (Blanchard et al, 2001;Chaby et al, 2016), while stress is known to alter feeding responses in a bidirectional pattern, with both increases and decreases in intake (Maniam and Morris, 2012).…”

Section: Discussionmentioning

confidence: 99%

Growth patterns in male rats exposed to concurrent long-term environmental challenges

Cuervo¹,

Racca²,

Beldoménico³

2016

FAVE Cs Vet

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SUMMARY.Growth is a key determinant of fitness in animals, and may be affected by the environmental challenges presented over the course of an individual's lifespan. When faced with limited resources and environmental challenges, organisms may prioritize the development and maintenance of particular processes over others. To expand our understanding of the consequences of organism exposure to a changing environment, we offer a long-term experiment to compare the growth patterns of young male rats exposed and not exposed to food limitation and social conflict. The patterns of growth of young rats were altered by the exposure to these environmental challenges, two of the most frequently faced by animals. As expected, scarcity of food resulted in a marked growth decline in animals exposed to nutritional stress. Interestingly, individuals exposed to an unstable social environment, but fed ad libitum, evidenced a growth rate 6% smaller than those under stable social conditions. An interaction between food limitation and social conflict was not observed. As a larger body size growth results in a competitive advantage in encounters, the detected divergence on growth patterns may represent significant consequences on the individual's life trajectory. RESUMEN. Patrones de crecimiento en ratas macho expuestas de manera prolongada a desafíos ambientales concurrentes. En animales, la eficacia biológica es influenciada por el crecimiento, que a su vez es afectado por los desafíos ambientales que el individuo enfrente a lo largo de su vida. Ante escasez de recursos u otros desafíos, los organismos priorizarían el desarrollo y mantenimiento de algunos procesos por sobre otros. Para profundizar nuestro conocimiento sobre las consecuencias de la exposición a un ambiente cambiante, desarrollamos un experimento de larga duración para comparar los patrones de crecimiento de ratas jóvenes expuestas y no expuestas a restricción alimentaria y conflicto social. La exposición a estos dos desafíos ambientales, comunes en la naturaleza, alteró los patrones de crecimiento de las ratas. La escasez de alimento ocasionó un descenso marcado del crecimiento en los animales bajo restricción alimentaria. Mientras que individuos expuestos a inestabilidad social, pero con alimento ad libitum, demostraron una tasa de crecimiento 6% menor que aquellos en condiciones sociales estables. Adicionalmente, no se encontró interacción significativa entre restricción alimentaria y conflicto social. Siendo que un mayor crecimiento corporal resulta ventajoso ante interacciones competitivas, la diferencia detectada entre los patrones de crecimiento tendría consecuencias de importancia en la trayectoria de vida de los individuos.

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The link between stress and feeding behaviour

Cited by 212 publications

References 186 publications

Biological mechanisms related to differences in residual feed intake in dairy cows

Biological mechanisms related to differences in residual feed intake in dairy cows

Obesity-Induced Structural and Neuronal Plasticity in the Lateral Orbitofrontal Cortex

Growth patterns in male rats exposed to concurrent long-term environmental challenges

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