THE EFFECT OF L-TRYPTOPHAN ON GROWTH HORMONE AND THYROID HORMONES SECRETION IN GROWING LAMBS

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SHOKR ELAHI B.; TOUHIDI A.; KHAZALI H.; ZHANDI M.

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Journal: Journal of Veterinary Research Year:2006 | Volume:61 | Issue:2 Page(s): 175-179

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Title

THE EFFECT OF L-TRYPTOPHAN ON GROWTH HORMONE AND THYROID HORMONES SECRETION IN GROWING LAMBS

Author(s)

SHOKR ELAHI B. | TOUHIDI A. | KHAZALI H. | ZHANDI M. | Issue Writer Certificate

Keywords

SEROTONIN AGONIST- GROWTH HORMONE-THYROID HORMONES (T3 AND T4) AND LAMBQ3

Abstract

Objectives: Survey on effects of serotonin agonist on the plasma concentrations of growth hormone (GB) and thyroid hormones (T3 and T4;TB) Design: Repeated measures (GLM) were used. Animals: Twenty Kurdish lambs 3-4 months old.Procedure: Animals were randomly divided into four groups. The first group (control) received 2 ml normal saline. The second, third and fourth groups received 120, 240 and 480 mg/kg body weight L-tryptophan through jugular vein, respectively. Blood samples were collected in three periods including before (days 1, 4, 5 and 6), during (days 7, 8, 9, 10, 11, 12, 13, 14, 15, 18,22,26,30 and 34) and after (days 36, 37 and 38) injections. Plasma concentrations of these hormones in unextracted samples were analyzed by radioimmunoassay kit (Tabeshyarnoor kits company, Tehran, Iran).Results: Injection of serotonin agonist increased mean plasma concentration (MPC) of GB (P<0.01).There are no significant differences in MPC of GB within the treated groups. Effects of blood sampling times, period (before, during, after injection) and their interaction with treatment on MPC of GB were significant (P<0.01). MPC of TB (T3 and T4) in all of the treated groups was significantly increased compare with control one (P<0.01). There are no significant differences in MPC of TB within the treated groups. Effects of blood sampling times and period (before, during and after injection) and also their interactive effects with treatment were significant.Conclusion: According to statistical analysis of data we can suggest that serotonin agonist stimulates GB and TB secretion simultaneously.

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APA: Copy

SHOKR ELAHI, B., TOUHIDI, A., KHAZALI, H., & ZHANDI, M.. (2006). THE EFFECT OF L-TRYPTOPHAN ON GROWTH HORMONE AND THYROID HORMONES SECRETION IN GROWING LAMBS. JOURNAL OF VETERINARY RESEARCH, 61(2), 175-179. SID. https://sid.ir/paper/35414/en

Vancouver: Copy

SHOKR ELAHI B., TOUHIDI A., KHAZALI H., ZHANDI M.. THE EFFECT OF L-TRYPTOPHAN ON GROWTH HORMONE AND THYROID HORMONES SECRETION IN GROWING LAMBS. JOURNAL OF VETERINARY RESEARCH[Internet]. 2006;61(2):175-179. Available from: https://sid.ir/paper/35414/en

IEEE: Copy

B. SHOKR ELAHI, A. TOUHIDI, H. KHAZALI, and M. ZHANDI, “THE EFFECT OF L-TRYPTOPHAN ON GROWTH HORMONE AND THYROID HORMONES SECRETION IN GROWING LAMBS,” JOURNAL OF VETERINARY RESEARCH, vol. 61, no. 2, pp. 175–179, 2006, [Online]. Available: https://sid.ir/paper/35414/en

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