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Individual hair cortisol as a tool for monitoring HPA activity in healthy dairy cows
Tanja Peric, A. Comin, M. Montillo, A. Prandi, T. Meloni, V. Zufferli, Massimo Faustini, S Pantaleo, 2012, published scientific conference contribution

Found in: osebi
Keywords: dlaka, kortizol, krave molznice
Published: 16.06.2016; Views: 2011; Downloads: 11
URL Fulltext (0,00 KB)

Do enviromental factors influence hair cortisol in foaling season?
Tanja Peric, A. Comin, M. Montillo, A. Prandi, T. Meloni, Massimo Faustini, F Cairoli, 2012, published scientific conference contribution abstract

Found in: osebi
Keywords: dlaka, kortizol, žrebe
Published: 16.06.2016; Views: 1444; Downloads: 13
URL Fulltext (0,00 KB)

Hair cortisol concentrations and semen production of Bos taurus bulls
Tanja Peric, A. Comin, M. Montillo, A. Prandi, V. Enrico Golini, G. Stradaioli, 2012, published scientific conference contribution abstract

Found in: osebi
Keywords: kortizol dlake, proizvodnja semena, semenčece
Published: 16.06.2016; Views: 1702; Downloads: 11
URL Fulltext (0,00 KB)

Hoof cortisol variation in calves during the neonatal period
Tanja Peric, A. Comin, M. Montillo, A. Prandi, G. Cornacchia, L. Magrin, 2013, published scientific conference contribution abstract

Found in: osebi
Keywords: parklji, kortizol, teleta
Published: 16.06.2016; Views: 1519; Downloads: 17
URL Fulltext (0,00 KB)

Insulin-like growth factor I plasma concentrations in newborn healthy donkey and horse foals
Tanja Peric, A. Comin, M. Montillo, A. Prandi, T. Meloni, Augusto Carluccio, I. De Amicis, S. Panzani, 2013, published scientific conference contribution abstract

Found in: osebi
Keywords: rastni hormon, plazemske koncentracije, žrebeta
Published: 16.06.2016; Views: 1810; Downloads: 7
URL Fulltext (0,00 KB)

Cortisol and progesterone profiles in hair from birth to 90 days of age in foals
Tanja Peric, A. Comin, M. Montillo, A. Prandi, Massimo Faustini, F Cairoli, 2012, published scientific conference contribution abstract

Found in: osebi
Keywords: kortizol dlake, progesteron dlake, žrebeta
Published: 16.06.2016; Views: 1651; Downloads: 9
URL Fulltext (0,00 KB)

Reducing treatments in cattle superovulation protocols by combining a pituitary extract with a 5% hyaluronan solution: Is it able to diminish activation of the hypothalamic pituitary adrenal axis compared to the traditional protocol?
Tanja Peric, Maurizio Monaci, Lakamy Sylla, Antonella Comin, Tatiana Sbaragli, Andrea Biancucci, Giuseppe Stradaioli, 2016, original scientific article

Abstract: Traditional superovulation protocols that include multiple gonadotropin treatments are time-consuming and labor intensive. These protocols require multiple handling and restraining of embryo donors. This will likely increase the risks of injuries in both animals and humans and induce stress that may lead to a reduced superovulatory response. These are more evident when working with cattle that are rarely handled or raised on extensive grazing. The objectives of this experiment were to compare the efficacy of a split-injection protocol of porcine pituitary-derived porcine FSH (pFSH) preparation (slow release [SR] group) to the traditional 4-day treatment with pFSH administered twice daily (C group) and to determine the concentrations of cortisol in the hair as a marker of activation of the hypothalamic-pituitary-adrenal (HPA) axis during the two superovulatory treatments. Thirty-two heifers were stimulated twice in a 2 × 2 crossover design and compared for ovarian response and numbers and characteristics of recovered ova-embryo among treatments. No differences between SR and C groups were found in terms of percentage of responsive animals (100% vs. 93.8%) and ovulation rate (83.7 ± 1.1 vs. 79.5 ± 1.0%). A positive correlation was found between the number of follicles responsive to pFSH (2-8 mm) at the beginning of treatments and the superovulatory response, and no differences were found in these follicular populations between the two treatment groups. The numbers of CLs, ova-embryos, fertilized ova, transferable and freezable embryos recovered per cow were found to be significantly higher in SR compared with C group (14.0 ± 1.6 vs. 10.6 ± 1.0, 12.1 ± 1.6 vs. 7.6 ± 1.0, 11.1 ± 1.1 vs. 7.3 ± 1.0, 9.6 ± 1.4 vs. 6.6 ± 1.0, and 9.4 ± 1.4 vs. 6.0 ± 1.0 for SR and C group, respectively). The SR group produced also a significantly greater number of excellent- and/or good-quality embryos compared with the C group. The concentrations of cortisol in the hair at Days 14 and 21 were significantly greater in the C compared with the SR group (P < 0.05). In conclusion, these results indicate that the dilution of gonadotropin in a 5% hyaluronan solution, reducing the administration frequency, improves the quantitative and qualitative superovulatory response of Marchigiana heifers. Further studies using other breeds of cattle are needed to verify the results herein obtained and to confirm the lower activation of the hypothalamic-pituitary-adrenal axis caused in the donor by the split-injection protocol.
Found in: osebi
Keywords: Beef heifer, Bovine, Hair cortisol, Hyaluronic acid, Slow release, Superovulation
Published: 01.03.2016; Views: 1729; Downloads: 177
.pdf Fulltext (403,15 KB)
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Relocation and Hair Cortisol Concentrations in New Zealand White Rabbits.
Alberto Prandi, Marco Stebel, Federico Canavese, Marta Montillo, Mirco Corazzin, Antonella Comin, Tanja Peric, 2016, original scientific article

Abstract: To investigate how long relocation modified hair cortisol concentrations in New Zealand white rabbits, 19 rabbits were subjected to a change in their breeding facility at the beginning of the trial and then were kept under stable environmental conditions. Hair samples were collected at the time of arrival to the nonhuman animal facility and at 40-day intervals from the same skin area for up to 440 days after the animals' arrival to the facility. A period effect on the hair cortisol concentration was found (p < .01). The transfer of the rabbits to the new facility might have induced an increase in the hypothalamic-pituitary-adrenal axis activity (p < .01). A second increase in hair cortisol concentration (p < .01) occurred at 320 days, after a change of personnel at the facility that occurred at 280 days, which was the only environmental change. The relocation of rabbits to the facility resulted in a stress response leading to elevated cortisol levels. The effect of relocation on mean cortisol concentrations was exhausted within 120 days when all environmental factors were kept stable.
Found in: osebi
Keywords: Cortisol, HPA axis, hair, rabbit, relocation
Published: 21.07.2016; Views: 1811; Downloads: 0

Alberto Prandi, Mirco Corazzin, Silvia Gazzin, Tanja Peric, Marta Montillo, Antonella Comin, published scientific conference contribution abstract

Abstract: Obesity and MetS (Metabolic Syndrome) are both linked to persistent long-term hormonal and metabolic changes. In most of the studies, cortisol (C) and dehydroepiandrosterone (DHEA) concentrations have been measured in obese and normal-weight subjects, obtaining heterogeneous results. Plasma, saliva and urine, matrices that represent timepoint or short-term steroids exposure, were used for these studies. The aim was to study C, DHEA and C/DHEA ratio of mice pups in the hair, matrix capable of providing cumulative hormonal exposure. Sixty C57Bl/6 mice pups (30 males and 30 females) were housed in a temperature-controlled environment (22±2°C) and on a 12h light/dark schedule, under ad-libitum access to food and water for 16 weeks (welfare: Italian Law Decree 116-92 and EC Directive 86-609-EEC). Control and experimental diets were offered immediately after weaning (3 weeks old pups), for 16 weeks. Four experimental checkpoints were established (T1: 4 weeks, T2: 8 weeks, T3: 12 weeks and T4: 16 weeks of diet). T3 and T4 showed the hormonal concentrations of pubertal animals. Twentyseven pups (13 females and 14 males) were randomly group-housed in cages (6 for T1, 5 for T2, 6 for T3, 10 for T4) and assigned to control diet (CTRL: D12328, Research Diets, New Brunswick, NJ). 33 pups (17 females and 16 males) were randomly group-housed in cages (5 for T1, 6 for T2 and T3, 16 for T4) and assigned to the HFHC diet (HFHC: D12331, Research Diets, New Brunswick, NJ - plus 42g/L fructose/sucrose in drinking water). At each experimental checkpoint, all the animals of one cage for each experimental group were suppressed. Hair strands were carefully cut with scissors as close as possible to the skin from the back of the mice, paying attention to not to wound the animals. Hair was stored in an envelope at RT in a dry room until use. C and DHEA hair concentrations was measured by a solid-phase microtiter RIA assay (Peric et al., 2016 adapted in the mouse). Only at 8 weeks the HFHC group showed significantly higher C concentrations than the CTRL group (1.56±0.06 vs 1.92±0.130 pg/mg; P<0.05). DHEA concentrations were significantly reduced in the HFHC group than the CTRL group at 4 (114.64±13.93 vs 69.08±5.33 pg/mg; P<0.05), 8 (71.67±7.08 vs 50.38±4.74 pg/mg; P<0.05), 12 (73.27±8.29 vs 41.59±1.60 pg/mg; P<0.01) and 16 weeks (65.26±3.35 vs 55.05±1.84 pg/mg; P<0.05). The C/DHEA ratio was significantly increased in the HFHC than the CTRL group, at 8 (0.023±0.002 vs 0.040±0.005; P<0.01), 12 (0.024±0.003 vs 0.036±0.004; P<0.05) and 16 weeks (0.019±0.001 vs 0.025±0.002; P<0.01). The gender effect was not significant. Taking into account the lag time required for the hair emersion from the skin (about 1 week), the significant stimulation of the C at 8 weeks in the HFHC group refers to its chronic elevation from 5 to 7 weeks of treatment when the animals were not pubertal. Conversely, DHEA shows a chronic reduction in obese mice leading to consider an independent adrenal regulation of C and DHEA, both stimulated by ACTH. Research was supported by the Project CBM (MIUR DM60643). Peric et al. 2016 J Appl Anim Welf Sci 18:1-8.
Found in: osebi
Published: 21.07.2016; Views: 2168; Downloads: 0
.pdf Fulltext (3,65 MB)

Use of hair cortisol analysis for comparing population status in wild red deer (Cervus elaphus) living in areas with different characteristics
Luca Pedrotti, Alberto Prandi, Tanja Peric, Antonella Comin, Chiara Caslini, Silvana Mattiello, 2016, original scientific article

Abstract: We tested a method to measure Hair Cortisol Concentration (HCC) in 174 red deer (Cervus elaphus) culled in the hunting season 2011/12 in four areas of Central Italian Alps, with different population densities (SPN, 11.8 deer/km2; HD-AV, 3.6 deer/km2; HD-SO, 2.1 deer/km2; HD-MO, 2.0 deer/km2) and environmental conditions. Our hypothesis was that higher population densities, associated with more difficult environmental conditions, may result in higher allostatic load for these wild ungulates. No significant differences in HCC were detected between sexes (males, 4.77 ± 0.69 pg/mg; females, 5.75 ± 0.63 pg/mg) nor among age classes (calves, 6.17 ± 0.66 pg/mg; yearlings, 4.47 ± 0.83 pg/mg; adults, 5.15 ± 0.74 pg/mg; least square mean ± SE), but HCC difference between calves and yearlings was close to statistical significance (P = 0.059). HCC showed high individual variation, but on average it was higher in areas with higher deer density (SNP, 7.45 ± 1.01 pg/mg; HD-AV, 6.07 ± 0.89 pg/mg; HD-SO, 4.67 ± 1.14 pg/mg; HD-MO, 2.87 ± 1.56 pg/mg), with significant differences between HD-AV and HD-MO (P = 0.01). Carcass weight was significantly lower in SNP (46.74 ± 1.49 kg) than in HD-MO (62.71 ± 4.01 kg), HD-SO (61.73 ± 2.9 kg) and HD-AV (62.07 ± 2.04 kg) (P < 0.001). These results seem to confirm our hypothesis that allostatic load is higher in areas with higher density and harder environmental conditions. We suggest that the methodology used in this study to measure HCC provides good information on long-term HPA axis activity and allostatic load and constitutes a highly promising, reliable and non-invasive method in wildlife management for assessing HPA axis activity over extended time periods.
Found in: osebi
Keywords: Red deer, Cervus elaphus, Hair, Cortisol, Allostatic load
Published: 29.09.2016; Views: 1708; Downloads: 0
.pdf Fulltext (602,58 KB)

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