Repozitorij Univerze v Novi Gorici

Iskanje po repozitoriju
A+ | A- | Pomoč | SLO | ENG

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju


1 - 10 / 10
Na začetekNa prejšnjo stran1Na naslednjo stranNa konec
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, izvirni znanstveni članek

Opis: 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.
Najdeno v: ključnih besedah
Povzetek najdenega: and to determine the concentrations of cortisol in the hair as a marker of...
Ključne besede: Beef heifer, Bovine, Hair cortisol, Hyaluronic acid, Slow release, Superovulation
Objavljeno: 01.03.2016; Ogledov: 418; Prenosov: 0
.pdf Polno besedilo (403,15 KB)
Gradivo ima več datotek! Več...

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, izvirni znanstveni članek

Opis: 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.
Najdeno v: ključnih besedah
Ključne besede: Cortisol, HPA axis, hair, rabbit, relocation
Objavljeno: 21.07.2016; Ogledov: 488; Prenosov: 0

Alberto Prandi, Mirco Corazzin, Silvia Gazzin, Tanja Peric, Marta Montillo, Antonella Comin, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: 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.
Najdeno v: ključnih besedah
Objavljeno: 21.07.2016; Ogledov: 666; Prenosov: 0
.pdf Polno besedilo (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, izvirni znanstveni članek

Opis: 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.
Najdeno v: ključnih besedah
Ključne besede: Red deer, Cervus elaphus, Hair, Cortisol, Allostatic load
Objavljeno: 29.09.2016; Ogledov: 364; Prenosov: 0
.pdf Polno besedilo (602,58 KB)

Plasma cortisol concentrations in Holstein Friesian and Belgian Blue newborn calves born by different types of delivery
L. O. Fiems, M. C. Veronesi, Geert Opsomer, Tanja Peric, M. Montillo, M. Probo, 2016, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: Cortisol (C) is a major stimulus for fetal and neonatal lung maturation and for surfactant production. Neonatal calves born by caesarean section (CS), particularly the double-muscled Belgian Blue (BB), are more proned to develop the respiratory distress syndrome (Cambier et al. 2002 Vet Res 33, 283–290; Danlois et al. 2003 Vet J 165, 65–72). The aim of this study was to investigate C plasma levels in 15 Holstein Friesian (HF) newborn calves born by spontaneous vaginal delivery (VD) and in 25 BB newborn calves born by elective CS. Blood samples were taken at 10, 20, 30 min and at 6, 24 h after birth and at 7 and 14 days of age. Plasma C concentrations were analyzed by RIA. Statistical analysis evidenced an influence of both time (p < 0.05) and group (p < 0.0001) on C concentrations. In agreement with previous studies, high C levels at birth were followed by a reduction at 6 h and by a further decrease on day 7 after birth in both groups. Cortisol concentrations were different between BB and HF calves, with significantly higher levels in HF calves. These findings are in agreement with studies in newborn babies, while previous studies on calves mentioned no differences in C levels between calves born without assistance vs. calves born by CS. The present results suggest that both breed and type of delivery are associated with plasma C levels in the newborn calf.
Najdeno v: ključnih besedah
Ključne besede: Plasma cortisol, Holstein Friesian, Belgian Blue, calf, delivery
Objavljeno: 15.11.2016; Ogledov: 498; Prenosov: 0
.pdf Polno besedilo (3,13 MB)

Hair cortisol and testosterone concentrations and semen production of Bos taurus bulls
Mirco Corazzin, Maria Cristina Veronesi, Antonella Comin, Marta Montillo, Tanja Peric, Giuseppe Stradaioli, Alberto Prandi, 2017, izvirni znanstveni članek

Opis: The experiment was aimed to evaluate the usefulness of hair cortisol concentrations (HCC) in revealing the activation of the hypothalamic-pituitary-adrenal (HPA) axis due to the passage of young bulls from genetic rearing stations to artificial insemination (AI) centre and the influence of this passage on hair testosterone concentrations (HTC). Hair samples on 33 yearling bulls were collected at the time of arrival (ST1) to the AI centre and 3 more hair samples (ST2, ST3, ST4) were collected at monthly intervals. After the end of quarantine each animal was submitted to the standard procedures for collection and production of semen. Overall HCC were significantly affected by period of collection (p<.01). In particular, HCC was higher in samples obtained after finishing the quarantine period (ST2) compared with those obtained on ST1. After ST2, the HCC decreased reaching at ST4 a value similar to that recorded at ST1. An effect of sampling time on HTC was not found (p>.05). The effect of breed was observed only for HTC that was higher in PRI than BS (p<.01). The HCC group have not influenced the semen variables (p>.05). On the contrary, the effect of breed was evident. The results of this study replicated the effects of a major environmental stressor on mean cortisol concentrations assessed in hair, and add to the growing body of evidence that HCC is an effective and simply collected marker for long-term activity of the HPA system in response to persistent environmental challenge.
Najdeno v: ključnih besedah
Ključne besede: Hair, bulls, cortisol, testosterone, semen
Objavljeno: 20.03.2017; Ogledov: 340; Prenosov: 0
.pdf Polno besedilo (1,71 MB)

Cortisol fetal fluids and newborn outcome in term pregnancy small-sized purebred dogs.
Barbara Bolis, Tanja Peric, Alessandro Rota, Massimo Faustini, Maria Cristina Veronesi, 2016, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: In order to provide further information about canine perinatology, and because of the scarce knowledge about fetal fluids composition in dogs, the present study was aimed to assess the cortisol concentrations in fetal fluids collected from small-sized purebred newborn puppies born by elective cesarean section, at term of pregnancy (Meloni et al, 2014). Furthermore we assessed possible correlations of amniotic and allantoic cortisol concentrations and newborn outcome at 24 hours of age and with the newborn gender. Fetal fluids cortisol concentrations were also evaluated for correlation with maternal parity, litter-size, neonatal gender, birth weight and Apgar score (Veronesi et al, 2009). The study, performed on 50 born alive, normal weighed puppies, without gross physical malformation, showed that cortisol concentration was higher in allantoic than in amniotic fluid (p<0.01), even if a strong positive correlation between the two fluids cortisol concentration was found (p<0.0001; R=0.83). Interestingly, higher amniotic (p<0.05) cortisol concentrations were associated to puppies not surviving at 24 hours after birth. Therefore it could be suggested that this parameter may be useful for the recognition, at birth, of puppies needing special surveillance in the first day of age. In relation to the other evaluated parameters, no correlations with amniotic or allantoic cortisol concentrations were found. In conclusion, the present results showed that in small-sized purebred puppies, born at term by elective caesarean section, the evaluation of amniotic cortisol concentration seems useful for the detection of puppies that need special surveillance during the first 24 hours of age, and should be coupled to the newborn evaluation by Apgar score.
Najdeno v: ključnih besedah
Ključne besede: cortisol, fetal fluids, pregnancy, dog
Objavljeno: 12.05.2017; Ogledov: 279; Prenosov: 11
.pdf Polno besedilo (711,48 KB)

Cortisol and DHEA concentrations in the hair of dairy cows managed indoor or on pasture
Tanja Peric, Mirco Corazzin, Alberto Romanzin, Stefano Bovolenta, Alberto Prandi, M. Montillo, Antonella Comin, 2017, izvirni znanstveni članek

Opis: This study was conducted in order to assess the changes of cortisol and dehydroepiandrosterone (DHEA) concentrations in hair of Italian Simmental dairy cows managed indoor in tie-stall barns or grazing on high mountain pasture. In experiment I, animals were kept in tie-stalls throughout the year (n = 27). In experiment II, animals remained on mountain pastures during summer (from 20th June to 20th September) and then kept indoors in tie-stalls for the rest of the year (n = 18). At the end of July, following vertical transhumance, dairy cows were moved to a pasture located at a higher altitude. In the two studies, hair samples, obtained using clippers from the animal's forehead, were collected on the 20th June (P1), 20th July (P2), 20th August (P3), 20th September (P4) and 20th October (P5) and analysed for cortisol and DHEA. In experiment I, DHEA concentration was unaffected by sampling time (P > 0.05), whereas, cortisol/DHEA ratio was similar between P1 and P2 (P > 0.05) and then increased during the experimental period reaching the highest value at P5 (P < 0.05). In experiment II, dairy cows had higher concentration of DHEA during grazing compared to cows kept indoors (P < 0.05), conversely cortisol/DHEA ratio decreased from P1 to P2 (P < 0.05), remained constant from P2 to P3 (P > 0.05) and then increased from P3 to P4 (P < 0.05), the highest value was recorded at P5. In conclusion, cortisol and DHEA concentrations and their ratio measured in the hair of dairy cows can be useful to evaluate the allostatic load in animals managed indoor in tie-stall barn or grazing on mountain pasture.
Najdeno v: ključnih besedah
Ključne besede: Dairy cow, Mountain pasture, Hair, Cortisol, DHEA
Objavljeno: 28.05.2017; Ogledov: 428; Prenosov: 0
.pdf Polno besedilo (205,07 KB)

Stefano Filacorda, Veronica Maran, Tanja Peric, Stefano Pesaro, Marta Montillo, 2017, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: Hair cortisol analysis is a complementary method for monitoring HPA axis activity, capturing systemic cortisol exposure over longer periods of time. We have tested the hair cortisol concentration on 16 specimens of Golden jackal (Canis aureus moreoticus): 5 from frozen animals, 10 from stuffed animals and 1 taken from injured animal during recovery in an Animal Care Center; the samples came from Italy (Friuli Venezia Giulia and Veneto Region) and Croatia (Istria and Dalmatian region). We have studied the hair cortisol concentration by RIA method in respect to conservation method, sex and areas of origin, with non parametric tests and mixed model. The hair cortisol concentration (values expressed in pg/mg) from the frozen animals (mean=3.38 SD=3.13, n=5) was not different in respect to the stuffed samples (mean=2.81 SD=2.72, n=9), also the sex has not showed any statistical effect (males mean=1.96 SD=0.63 n=9; females mean=4.56 SD=3.99 n=6). The hair cortisol concentration in respect to the sites of origin of samples, dispersal and core areas was not different (dispersal areas: mean=1.56 SD=0.77 n=5, core areas: mean=3.72 SD=3.14 n=10). The use of mixed model to detect the effect of areas (core and dispersal areas) and interaction between sex and areas has showed the presence of significative higher hair concentrations of cortisol in core areas for the females (mean=6.27 SD=3.84 n=4)in respect to the males (mean=2.02 SD=0.52 n=6). The concentration of hair cortisol of sick and injured animal recovered in the Animal Care Center was higher (> of 12 pg/mg) in respect to the other samples. Hair sample can be used to develop a clearer understanding of the interrelationship of health and physiology, mobility and social behaviour.
Najdeno v: ključnih besedah
Ključne besede: hair, Canis aureus, cortisol
Objavljeno: 19.07.2017; Ogledov: 572; Prenosov: 0
.pdf Polno besedilo (1,91 MB)

Cortisol claws concentrations in dogs from birth to 60 days of age
Jasmine Fusi, Tanja Peric, Barbara Bolis, Alessandro Rota, Antonella Comin, Maria Cristina Veronesi, 2017, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: During the last fetal stage of development and in the neonatal period, the hypothalamic- pituitary- adrenal (HPA) axis secretes cortisol (C), responsible for several physiologic processes. The claws were recently proved to be a useful, non- invasive matrix for long time- frame retrospective C levels analysis also in puppies (Veronesi et al. 2015, Theriogenology 84:791–796). Because of the scarce knowledge on canine perinatology, this study was aimed to assess the C concentrations in claws of newborn puppies collected at birth, 30 and 60 days of age, and to evaluate the possible influence of age, gender and type of birth on C claws accumulation. The study was performed on 58 large purebred, normal, healthy puppies, born by spontaneous or cesarean parturition. The mean C claws concentrations significantly decrease from birth (26 ± 16.39 pg/mg) to 30 (10 ± 4.53 pg/mg) and 60 (6 ± 3.12 pg/mg) days of age (p < 0.0001); a decrease was also seen from 30 to 60 days of age (p < 0.05). No influence of newborn gender and type of birth was found. This trend of decrease is in agreement with data reported by (Veronesi et al. 2015, Theriogenology 84:791–796) in dead puppies, and suggests the important role of C around the time of birth. However the exact source of the C accumulated in claws of puppies at birth must be clarified, while the source of C accumulated at 30, and even more at 60 days, can be supposed to be addressed to the newborn itself.
Najdeno v: ključnih besedah
Ključne besede: Cortisol, claws, dog
Objavljeno: 01.09.2017; Ogledov: 113; Prenosov: 0
.pdf Polno besedilo (7,74 MB)

Iskanje izvedeno v 0 sek.
Na vrh