Concentrations of thyroid hormones in various age categories of ruminants and swine

Paulíková, I.; Seidel, H.; Nagy, Oskar; Tóthová, Csilla; Kováč, G.

doi:10.2298/avb1106489p

Cited by 20 publications

(11 citation statements)

References 45 publications

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“…In the present study, significant decreases in concentrations of T3 and T4 at post-puberty age (M4–M5) compared with pre-puberty (M1–M3) age may be attributable to the change of metabolic activity. Our results were consistent with those reported in cattle [ 74 ]. Although FSH did not show significant changes in the present study, it cannot be ascertained that the hypothalamus-pituitary axis was not affected, because we were solely dependent on measuring monthly changes in the basal FSH levels.…”

Section: Discussionsupporting

confidence: 94%

Monthly Dynamics of Plasma Elements, Hematology, Oxidative Stress Markers, and Hormonal Concentrations in Growing Male Shiba Goats (Capra hircus) Reared in Tokyo-Japan

Mandour

Samir

El-Beltagy

et al. 2022

Animals

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From a clinical point of view, the establishment of laboratory variables during the first few months of an animal’s life helps clinicians to make sure they base their medical decisions on laboratory values for the specific breed and age group. The present study aimed to investigate the monthly dynamics in some plasma elements, hematology, reproductive hormones, and oxidative stress marker profiles during the first five months of age (neonatal and peri-puberty stage) in male Shiba goat’s kids. Sixteen kids were investigated from the first to the fifth month (M1 to M5), and the data were presented as the statistical difference between them. Whole blood and plasma samples were collected monthly for analysis of basal hematology, plasma elements concentration (trace elements: Cu, Zn, Se, Fe, and Cr; macroelements: Ca and Mg), circulating hormones (cortisol, FSH, LH, IGF1, immunoreactive inhibin, testosterone, T3, and T4), and oxidative stress markers (MDA, CAT, SOD, and GPX). The results showed age-related changes in the observed parameters. The fifth month recorded the lowest level of almost all investigated minerals, except for Cr. Plasma hormone levels revealed age-dependent increases in IGF-1 and testosterone, age-related decreases in T3 and T4, and non-significant changes in cortisol and FSH. Besides, the concentrations of inhibin and LH were significantly higher at M1–M3 compared with M4–M5. Plasma SOD, GPX, and CAT were increased with age. In conclusion, age-related changes and a distinction of age in months was found necessary to interpret the laboratory results, specifically in terms of age in months and the peri-puberty stage in young goats, which are important to follow up the age-specific diseases, reproductive status, and treatment follow-ups in this stage.

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Section: Discussionsupporting

confidence: 94%

Monthly Dynamics of Plasma Elements, Hematology, Oxidative Stress Markers, and Hormonal Concentrations in Growing Male Shiba Goats (Capra hircus) Reared in Tokyo-Japan

Mandour

Samir

El-Beltagy

et al. 2022

Animals

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“…Each hormone was assayed once. Normal levels were considered as >0.5 ng/mL for T3 and >20 for T4 (Paulíková et al 2011). Blood urea was measured using the UV kinetic urea test, and blood urea nitrogen (BUN) quantified by multiplying the urea values by the factor 0.467 (Wiener Lab., Rosario, Argentina).…”

Section: Mimosine Its Derivatives Hormones and Nitrogen In Bloodmentioning

confidence: 99%

Ovarian activity and estrus behavior in early postpartum cows grazing Leucaena leucocephala in the tropics

Luzardo

Aguilar-Pérez

Centurión-Castro

et al. 2015

Trop Anim Health Prod

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The legume Leucaena leucocephala (Leucaena) is widely used to supplement forage in silvopastoral livestock systems in Latin America. Little is known about its possible effects on the cow reproductive dynamic. The aim was to evaluate the effect of Leucaena foliage intake on re-establishment of ovarian activity and estrus behavior in early postpartum (7-90 days) cows. Twenty-four multiparous Bos taurus × Bos indicus cows were divided into two homogenous groups and assigned to one of two treatments: a silvopastoral system (SS, n = 12), consisting of an association of Cynodon nlemfuensis grass and L. leucocephala; and a control system (CS, n = 12), consisting of C. nlemfuensis alone. Intake of Leucaena in the SS ranged from 3.80 to 6.43 kg DM/cow/day. Plasma mimosine concentrations ranged from 1270 to 1530 μg/mL, and those for 2,3-dihydroxypyridine (DHP) from 147 to 729 μg/mL. No 3,4-DHP was detected in plasma. No difference (P > 0.05) between treatments was observed for the number of cows exhibiting small, medium, or dominant follicles, or estrus behavior. The number of cows which re-established ovarian cyclicity (n = 6) was lower (P < 0.05) in the SS than in the CS (n = 9). Corpus luteum lifespan was longer (P < 0.05) in the SS than in the CS. Intake of Leucaena affected the number of cows exhibiting ovarian cyclicity and extended corpus luteum life, but did not affect follicular development and estrus behavior.

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“…In these cows, the average T4f level was 0.63 ± 0.05 ng/dl (Table 3). Normal range of T4f is 0.7±0.18 (13).…”

Section: Case Reportmentioning

confidence: 92%

Perinatal mortality in cattle associated with goitre

Micheloud

Olmos

García

et al. 2019

BJVP

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The role of iodine in ruminant reproductive function is well known. However, studies about the impact of this deficiency in reproductive performance of cattle are scarce. This paper describes stillbirth episodes in three beef cow herds in northwest Argentina. The stillbirth losses ranged between 15.8 and 25%. Grossly, the thyroid glands presented diffuse, bilateral and symmetric enlargement. Microscopically, follicular epithelium showed severe hyperplasia and hypertrophy, forming multiple stratified layers of large cuboidal cells, with papillary projections into the follicular lumen. Free thyroxine (T4f) mean levels in serum from aborted cows and heifers was 0.63±0.05 ng/dl. A diagnosis of congenital goiter was performed based on these findings. Following the diagnosis, the herds were supplemented orally and parentally with iodine. Mean T4f level post-treatment was 0.80±0.05 ng/dl and the stillbirth rate dropped sharply.

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Concentrations of thyroid hormones in various age categories of ruminants and swine

Cited by 20 publications

References 45 publications

Monthly Dynamics of Plasma Elements, Hematology, Oxidative Stress Markers, and Hormonal Concentrations in Growing Male Shiba Goats (Capra hircus) Reared in Tokyo-Japan

Monthly Dynamics of Plasma Elements, Hematology, Oxidative Stress Markers, and Hormonal Concentrations in Growing Male Shiba Goats (Capra hircus) Reared in Tokyo-Japan

Ovarian activity and estrus behavior in early postpartum cows grazing Leucaena leucocephala in the tropics

Perinatal mortality in cattle associated with goitre

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