Effect of repeated adrenocorticotropic hormone administration on reproductive function and hair cortisol concentration during the estrous cycle in goats

Endo, Natsumi; Yamane, Haruki; Rahayu, Larasati Puji; Tanaka, Tomomi

doi:10.1016/j.ygcen.2017.11.027

Cited by 20 publications

(19 citation statements)

References 29 publications

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“…Hair cortisol concentrations can be used as a tool to assess chronic stress or long-term activity of the HPA but not for occasional and sporadic stress events [14]. Experimental repeated stimulations with adrenocorticotropic hormone (ACTH) increased HCCs [15][16][17][18], but single doses of ACTH were insufficient to affect HCCs [14,19], indicating the robustness of HCCs against sporadic stress responses. Additionally, repeated stimulations with corticotropin-releasing hormone (CRH) increased the HCCs in CRH-treated animals compared with non-treated animals [20].…”

Section: Introductionmentioning

confidence: 99%

Temporary Relocation during Rest Periods: Relocation Stress and Other Factors Influence Hair Cortisol Concentrations in Horses

Gardela

Carbajal

Talló-Parra

et al. 2020

Animals

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Horse transportation for temporary relocation during rest periods is a common and widespread practice among horse owners, either from sport competition or working tasks. This study aimed to determine the effect of a relocation period and the multiple factors associated with a rest period on hair cortisol concentrations (HCCs) in horses. Additionally, this study reports the seasonal effect on HCCs and hair growth over a year. Thirteen police horses, Pure Spanish stallions of various ages (5–13 y), were selected to participate in this study. Hair sample collection was carried out approximately every 30 d for seven months (Study 1) and a year (Study 2). Cortisol determinations were performed by enzyme immunoassay. Interestingly, Study 1 revealed that relocated horses (n = 4) exhibited elevated HCCs compared with control horses (n = 4) after the relocation period (p < 0.05). Study 2 (n = 5) showed higher HCCs during summer compared with autumn and winter, and higher hair growth rates in winter compared with the other seasons (p < 0.05). Relocated horses had higher HCCs, suggesting a change in their welfare status, probably related to the sudden change in their surrounding conditions. However, these results should be interpreted cautiously due to the low sample size used. The nature of the relationship between HCCs and horse welfare needs to be further examined.

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Section: Introductionmentioning

confidence: 99%

Temporary Relocation during Rest Periods: Relocation Stress and Other Factors Influence Hair Cortisol Concentrations in Horses

Gardela

Carbajal

Talló-Parra

et al. 2020

Animals

View full text Add to dashboard Cite

show abstract

“…Studies have shown that hormone concentrations in keratinized tissues increase during prolonged or repeated elevation of circulating levels, but not in response to single, acute hormone elevations (Endo et al . , Tallo‐Parra et al . ).…”

Section: The Mean (± Sd) Baseline (± Sd) and Maximum Values For Cormentioning

confidence: 99%

“…Recent research using ACTH stimulation to mimic HPA axis activation in goats and calves showed that acute fluctuations in circulating GCs were not reflected in hair—the authors concluded that elevated hair GCs likely resulted from longer term activation of the HPA axis (Endo et al . , Tallo‐Parra et al . ).…”

Section: The Mean (± Sd) Baseline (± Sd) and Maximum Values For Cormentioning

confidence: 99%

“…Thus, the hormone content of a baleen sample from a given location along the plate reflects an integrative measure of the circulating levels of that hormone during the period of tissue growth. Studies have shown that hormone concentrations in keratinized tissues increase during prolonged or repeated elevation of circulating levels, but not in response to single, acute hormone elevations (Endo et al 2017, Tallo-Parra et al 2017. Therefore, GC concentrations in these integumentary tissues are being explored as a method for assessing a record of chronic stress responses Novak 2012, Mack andFokidis 2017).…”

mentioning

confidence: 99%

“…other keratinized tissues (D'Anna- Hernandez et al 2011, Bryan et al 2013, Mack and Fokidis 2017. Recent research using ACTH stimulation to mimic HPA axis activation in goats and calves showed that acute fluctuations in circulating GCs were not reflected in hair-the authors concluded that elevated hair GCs likely resulted from longer term activation of the HPA axis (Endo et al 2017, Tallo-Parra et al 2017. These studies from other taxa provide further evidence that the elevation of GCs over multiple months found in baleen from 17B6 reflected an adrenal response to the chronic entanglement experienced by this whale.…”

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confidence: 99%

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