Zinc supplementation decreases total thyroid hormone concentration in small ruminants

Keçeci, Tufan; Keskin, Ercan

doi:10.1556/avet.50.2002.1.11

Cited by 16 publications

(11 citation statements)

References 18 publications

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“…It indicated that supplemental zinc either from inorganic or organic sources did not infl uence plasma T 3 and T 4 concentration in crossbred calves. Contrary to above Kececi and Keskin (2002) in lambs observed reduced concentration of serum T 3 and T 4 on supplementation of 290 mg Zn kg -1 diet. Th e mean concentration of plasma insulin exhibited non-signifi cant (P>0.05) variation among dietary treatments.…”

Section: Resultscontrasting

confidence: 71%

Effect of zinc supplementation from inorganic and organic sources on growth and blood biochemical profile in crossbred calves

Mandal¹,

Dass²,

Garg³

et al. 2008

J. Anim. Feed Sci.

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The effect of zinc supplementation from inorganic and organic sources on some physiological and biochemical profi le was investigated in 15 male crossbred calves (age 14-15 months, liveweight 226.0 ± 9.06 kg) randomly divided into three groups of fi ve animals in each. Animals in group I (control) were fed a basal diet comprised of wheat straw and concentrate mixture (33 mg Zn kg -1 diet) with out any supplemental Zn, while those in group 2 and group 3 were given basal diet supplemented with 35 mg Zn kg -1 feed from zinc sulphate and zinc propionate, respectively. All the animals were fed individually on these dietary treatments for a period of 180 days. Body weights of all the calves were recorded fortnightly. Blood samples were collected from all the animals at 0 day and subsequently at an interval of 30 days to estimate certain serum minerals, enzymes, vitamins and hormones. There was no signifi cant difference in the body weight gain among different groups. Zinc intake in groups 2 and 3 was signifi cantly (P<0.001) higher as compared to group 1, but serum zinc and copper concentration did not differ among the groups. Mean activity of alkaline phosphatase, glutamate oxaloacetate transaminase, glutamate pyruvate transaminase and super oxide dismutase was also similar in control and Zn supplemented groups. Mean concentrations of different serum vitamins (retinol, ß-carotene and α-tocopherol) and hormones (triiodothyronine, thyroxin, insulin and testosterone) were not affected by zinc supplementation from inorganic and organic sources in crossbred calves. It may be concluded that * Supported by AP Cess Scheme, ICAR, Krishi Bhawan, New Delhi, India 4 Corresponding author: e mail: rsd@ivri.up.nic.in Animal and Feed Sciences, 17, 2008, 147-156 148 ZINC SUPPLEMENTATION AND GROWTH OF CATTLE supplementation of zinc in the diet of crossbred calves was not effective in improving the growth rate and concentration of minerals, enzymes, vitamins and hormones in blood serum or plasma in crossbred calves, which may be due to relatively small dose of zinc (35 mg Zn kg -1 diet) used in this study. Journal of

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Section: Resultscontrasting

confidence: 71%

Effect of zinc supplementation from inorganic and organic sources on growth and blood biochemical profile in crossbred calves

Mandal¹,

Dass²,

Garg³

et al. 2008

J. Anim. Feed Sci.

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“…Interrelationships among copper and iodine and thyroid hormones were studied in rats by Esipenko and Marsakova (1990) and Aurthor et al (1996). Kececi and Keskin (2002) reported a significant negative correlation between zinc concentration of erythrocytes and serum thyroid hormones in healthy male Herino lambs and Angora goats.…”

Section: Discussionmentioning

confidence: 96%

The relationship between serum level of thyroid hormones, trace elements and antioxidant enzymes in dromedary camel (Camelus dromedarius)

Nazifi

Mansourian

Nikahval

et al. 2008

Trop Anim Health Prod

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Thyroid hormones might be able to regulate the activities of superoxide dismutase (SOD), catalase and glutathione peroxidase (GPX). The role of thyroid hormones in metabolic pathways and antioxidant enzyme activities are well known in many species. Nevertheless, there is no report describing probable relationship between thyroid hormones status, erythrocyte antioxidant enzymes and serum profiles of trace elements. This study was undertaken to investigate the relationship between these parameters in Iranian dromedary camels. Blood samples were taken from the jugular vein of 30 clinically healthy Iranian dromedary camels under aseptic conditions during 6 consecutive days of summer. The serum was analyzed for serum profile of thyroid hormones, trace elements, SOD and GPX activity. There were no significant differences in serum thyroid hormones, serum level of zinc (Zn), copper (Cu), manganese (Mn), iron (Fe), selenium and antioxidant enzymes in different days (P > 0.05). There was a significant negative correlation between SOD and Fe (P < 0.01, r = -493). There was no significant correlation between other parameters. In case of copper deficiency likewise the present study, the copper was used to produce more SOD, so there was a decrease in Fe transportation, and it might be a cause of decrease in Fe amount. On the other hand, a relatively small quantity of Fe is present in tissue myoglobin, catalase, peroxidases, and cytochromes. So it might be another cause of decrease in Fe amount. The explanation for these finding is not possible at this moment and further investigations are needed to interpret these changes.

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“…While the mean concentration of total T4 kept constant through the course of the study. Kececi and Keskin (2002) reported that lambs and goats in the Zn groups (40 mg/kg DM for lambs and 35 mg/ kg DM for goats) had significantly higher (P < 0.05) in plasma Zn values than the control one. Contrary to the above results Mandal et al (2008) indicated that supplemental zinc either from inorganic or organic sources did not influence plasma T3 and T4 concentration in crossbred calves.…”

Section: Blood Metabolitesmentioning

confidence: 92%

Effect of Zinc Supplemention From Inorganic and Organic Sources on Nutrient Digestibility, Some Blood Metabolites and Growth Performance of Growing Buffalo Calves

Hassan

Farghaly

Solouma

2016

Egyptian Journal of Nutrition and Feeds

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his study was conducted to determine the effects of zinc supplementation either from inorganic or organic sources on digestibility, blood metabolites and animal performance. Twelve buffalo calves of 11-13 months of age weighing 257.66 ± 26.41 kg were divided into three similar groups of 4 calves each, where G1 was served as control ration, and was fed the basal diet consisting of roughage and concentrate mixture. While the two tested groups were fed the same basal diet, but supplemented with 30 mg Zn//head/day of Zn sulphate (G2). And supplemented with 30 mg Zn//head/day as Zink methionine ( G3). The basal diet contains 28.3 mg/kg Zn, and , additionally, the doses of Zn in the tested groups were orally supplemented. All animals of these groups were fed 80% of their requirements as concentrate mixture and the rest of requirements were covered from wheat straw and alfalfa hay in equal quantities . The daily requirements of energy and crude protein for growing calves were cover according (NRC, 2001). Results indicated that supplemented Zn methionine or Zn sulphate to calves diet increased significantly (p< 0.05) all nutrient digestibilities and feeding value in terms of TDN and DCP as compared with control group. Also, Supplemented Zn methionine for calves' diet increased significantly (p< 0.05) the consenterion of serum Zn, plasma T3 and decreased significantly (p< 0.05) cholesterol concentration as compared with Zn sulphate and control groups. While , serum total protein, Albumin, globulin, and AST were not affected significantly by zinc supplementation from inorganic or organic sources in buffalos calves in comparison with control ration . The body weight and daily gain were significantly higher (P<0.05) for claves fed supplemented Zn-methionine or zinc sulphate ration, than those fed control one . The body weight gain in Zn-methionine group was increased by about 35.29% and 16.59 % than those fed control or zinc sulphate ration , respectively. There was no significant difference in total feed intake among different groups. Supplementation of Zn-meth significantly (P<0.05) improved the feed conversion efficiency and the feed cost/kg weight gain as compared with Zn sulphate and control groups.From the results of this study it could be concluded that supplemented zinc from inorganic or organic sources in buffalo's calves diets improved digestibility and performances of growing buffalo and calves could be recommended that supplement Zn-methionine to growing buffaloes calves rations under Upper Egypt conditions because of its higher bioavailability than Zn sulphate.

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Zinc supplementation decreases total thyroid hormone concentration in small ruminants

Cited by 16 publications

References 18 publications

Effect of zinc supplementation from inorganic and organic sources on growth and blood biochemical profile in crossbred calves

Effect of zinc supplementation from inorganic and organic sources on growth and blood biochemical profile in crossbred calves

The relationship between serum level of thyroid hormones, trace elements and antioxidant enzymes in dromedary camel (Camelus dromedarius)

Effect of Zinc Supplemention From Inorganic and Organic Sources on Nutrient Digestibility, Some Blood Metabolites and Growth Performance of Growing Buffalo Calves

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