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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, published scientific conference contribution abstract

Abstract: 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.
Found in: ključnih besedah
Keywords: Cortisol, claws, dog
Published: 01.09.2017; Views: 1870; Downloads: 0
.pdf Fulltext (7,74 MB)

17-ß-Estradiol and Testosterone concentrations in claws of puppies up to 60 days of age.
Jasmine Fusi, Tanja Peric, Cristina Bergamin, Maria Cristina Veronesi, 2018, published scientific conference contribution abstract

Abstract: The current 30% of canine perinatal mortality (Tonnessen et al., 2012) claims the need to deepen the knowledge about this phase, characterized by long-term hormonal and metabolic changes, that could benefit of long time-frame methods of investigation, reducing the quantity of samplings and thus respecting animal welfare (Veronesi et al., 2015). Indeed, apart from the well-known invasiveness of blood samplings, the necessary repeated collection of feces, urine and saliva, providing punctual information, could be stressful for the newborns and their mothers with negative effects on health status and maternal behavior. Given that sexual steroid hormones were reported to have an influence on health outcomes and development already from the perinatal period (Frey et al., 2017), in this work 17-β-Estradiol (E2) and Testosterone (T) concentrations were assessed from the claws of dogs up to 60 days of age, to identify possible endogenous biomarkers. Ten male and 10 female puppies, viable and healthy, born by elective cesarean section, were enrolled. Samplings were performed by trimming claws at birth, and the regrowth at 30 and 60 days of age after the breeder or the owner signed an informed consent. Then, E2 and T concentrations were analyzed by RIA (Veronesi et al., 2015) and a possible effect of gender evaluated by ANOVA. All the hormonal claws concentrations showed a significant (p<0.001) drop from birth to 30 and 60 days of age, while no significant changes were observed between 30 and at 60 days of age (Table 1). No influence of the newborns’ gender was found. Because of the higher levels of E2 and T observed at birth and at 30 days of age, it could be supposed that a source of production could be the placental and maternal compartments. However, the direct involvement of the fetus itself could not be excluded, given the reported accumulation from the nail capillary bed of those hormones (de Berker et al., 2007) and the production of sexual steroid hormones by feline fetal gonads (Braun and Jewgenow, 2017).
Found in: ključnih besedah
Keywords: Dog, Puppy, Claws, 17-ß-Estradiol, Testosterone.
Published: 09.04.2019; Views: 686; Downloads: 0
.pdf Fulltext (876,50 KB)

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