The influences of thermal stress on serum biochemical parameters of Iranian fat-tailed sheep and their correlation with triiodothyronine (T 3 ), thyroxine (T 4 ) and cortisol concentrations

Nazifi, Saeed; Saeb, M.; Rowghani, E.; Kaveh, K.

doi:10.1007/s00580-003-0487-x

Cited by 100 publications

(82 citation statements)

References 20 publications

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“…The concentration of plasma urea also reflects changes in the metabolism of proteins, whereby changes in the amount of total proteins and albumin in the blood can be explained (Payne 1987). This statement is also supported by the work of Godden et al (2001), Brown and Adjei (2001), Nazi et al (2003), Thrall et al (2004) as well as Grunwaldt et al (2005), who found out that the concentration of urea in blood plasma depends on the amount of ingested proteins in the feed and their degradation in the rumen, the dietary composition of ingested amino acids, and the capacity for degradation of saccharides in the rumen. In our experiment, higher average values for the concentration of urea were recorded in bulls, corresponding with the findings of Otto et al (2000).…”

Section: Discussionmentioning

confidence: 59%

Blood Plasma Metabolic Profile of Aberdeen Angus Bulls during Postnatal Ontogenesis

et al. 2010

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Selected indicators for the metabolic profile of blood plasma in 22 Aberdeen Angus bulls reared by the extensive method were monitored during postnatal development (from 4 to 564 days of age), including total proteins, albumin, urea, creatinine, glucose, cholesterol, triacylglycerols, bilirubin, alkaline phosphatase, alanine transaminase, aspartate transaminase, tyroxin, triiodothyronine, calcium, inorganic phosphorus, magnesium, potassium, sodium, chlorides, copper, zinc and iron. In assessing the relationship of age to the indicators of the internal environment, values of correlation coefficients for total proteins (r = -0.70; p < 0.01), albumin (r = -0.56; p < 0.01), urea (r = -0.73; p < 0.01), glucose (r = -0.38; p < 0.01) and triiodothyronine (r = -0.82; p < 0.01) were established. Significant relationships were shown between the temperature of the external environment and the amount of total proteins (r = -0.38; p < 0.01), urea concentration (r = -0.41; p < 0.01), ALP (r = 0.58; p < 0.01) and ALT (r = 0.45; p < 0.01) activity. Temperature also showed a significant impact on the concentration of P (r = 0.57; p < 0.01), K (r = -0.69; p < 0.01) and Zn (r = 0.33; p < 0.01). The work yields important information on changes in the indicators of the metabolic profile of the blood plasma of bulls during postnatal development under defined nutritional and temperature conditions that can be used as reference values for evaluating health status as well as nutrition level. Beef cattle, internal environment, blood plasma nutrition status

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Section: Discussionmentioning

confidence: 59%

Blood Plasma Metabolic Profile of Aberdeen Angus Bulls during Postnatal Ontogenesis

et al. 2010

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“…This might be due to the increase in utilization of fatty acids for energy production as a consequence of the decrease in glucose concentration in thermally stressed animals (Daader et al 1989;Rasooli et al 2004). Furthermore, it is an established fact that the effect of elevated cortisol on fat metabolism during thermal stress is to increase cholesterol catabolism to support gluconeogenesis to supply more energy to heat stressed animals (Nazifi et al 2003). The restricted feeding might have added an additional stress load to restrict synthesis of cholesterol in the combined stress group to significantly lower total cholesterol concentration as compared to individual stress groups.…”

Section: Discussionmentioning

confidence: 98%

“…The major exogenous regulator of thyroid gland activity is environmental temperature (Dickson 1993). Heat stress in general is associated with significant depression of thyroid gland activity, resulting in lowering of thyroid hormone levels (Nazifi et al 2003;Rasooli et al 2004;Saber et al 2009). In addition, blood thyroid hormones are considered to be good indicators of the nutritional status of an animal (Riis and Madsen 1985).…”

Section: Discussionmentioning

confidence: 99%

Adaptive capability as indicated by endocrine and biochemical responses of Malpura ewes subjected to combined stresses (thermal and nutritional) in a semi-arid tropical environment

2010

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A study was conducted to assess the effect of combined stresses (thermal and nutritional) on endocrine and biochemical responses in Malpura ewes. Twenty eight adult Malpura ewes (average body weight 33.56 kg) were used in the present study. The ewes were divided into four groups viz., GI (n = 7; control), GII (n = 7; thermal stress), GIII (n = 7; nutritional stress) and GIV (n = 7; combined stress). The animals were stall fed with a diet consisting of 60% roughage and 40% concentrate. GI and GII ewes were provided with ad libitum feeding while GIII and GIV ewes were provided with restricted feed (30% intake of GI ewes) to induce nutritional stress. GII and GIV ewes were kept in climatic chamber at 40°C and 55% RH for 6 h a day between 1000 hours and 1600 hours to induce thermal stress. The study was conducted for a period of two estrus cycles. The parameters studied were Hb, PCV, glucose, total protein, total cholesterol, ACP, ALP, cortisol, T(4), T(3), and insulin. Combined stress significantly (P < 0.05) affected all parameters studied. Furthermore, the results revealed that, compared to thermal stress, nutritional stress had a less significant effect on the parameters studied. However, when both these stresses were coupled, they had a severe impact on all the parameters studied in these ewes. It can be concluded from this study that two stressors occurring simultaneously may impact severely on the biological functions necessary to maintain homeostasis in sheep.

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“…The result was in accordance with the reports of [14] in sheep; [15] and [16] in camel. Environmental stress can influence the urea cycle in hepatocytes [17], thereby causing profound effect during very hot and very cold conditions [18].…”

Section: 11mentioning

confidence: 99%

Ambient Temperature Associated Variations In Serum Urea And Creatinine In Marwari Goats

Kour¹,

Kataria²,

Lawhale³

2014

IOSRJAVS

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The influences of thermal stress on serum biochemical parameters of Iranian fat-tailed sheep and their correlation with triiodothyronine (T 3 ), thyroxine (T 4 ) and cortisol concentrations

Cited by 100 publications

References 20 publications

Blood Plasma Metabolic Profile of Aberdeen Angus Bulls during Postnatal Ontogenesis

Blood Plasma Metabolic Profile of Aberdeen Angus Bulls during Postnatal Ontogenesis

Adaptive capability as indicated by endocrine and biochemical responses of Malpura ewes subjected to combined stresses (thermal and nutritional) in a semi-arid tropical environment

Ambient Temperature Associated Variations In Serum Urea And Creatinine In Marwari Goats

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