A Case of a Pony with Cushing's Disease.

Okada, Toshiya; Yuguchi, Kiyohide; Kiso, Yasuo; Morikawa, Yoshio; Nambo, Yasuo; Oikawa, Masa-aki; Sasaki, Fumihiko

doi:10.1292/jvms.59.707

Cited by 6 publications

(2 citation statements)

References 9 publications

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“… 20 , 23 , 24 In Japan, no studies have focused on PPID in Thoroughbred broodmares, and no literature on diagnosis and treatment is available. 25 , 26 Without such guidance, negative economic impact is likely for owners whose aging broodmares have decreased fertility and a shortened reproductive period.…”

Section: Introductionmentioning

confidence: 99%

“…Little research has been performed describing the relationship between PPID and reproductive performance, conception rates, and delivery rates 20,23,24 . In Japan, no studies have focused on PPID in Thoroughbred broodmares, and no literature on diagnosis and treatment is available 25,26 . Without such guidance, negative economic impact is likely for owners whose aging broodmares have decreased fertility and a shortened reproductive period.…”

Section: Introductionmentioning

confidence: 99%

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Relationship between endogenous plasma adrenocorticotropic hormone concentration and reproductive performance in Thoroughbred broodmares

Tsuchiya

Noda

Ikeda

et al. 2021

Veterinary Internal Medicne

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Background: Pituitary pars intermedia dysfunction (PPID) is an endocrine disorder the clinical signs of which include infertility, but few reports have examined the relationship between PPID and reproductive performance in broodmares.Hypothesis/Objective: Broodmares with infertility of unknown etiology were screened for PPID using baseline endogenous plasma ACTH concentrations, and its relationship with subsequent reproductive performance was analyzed.Animals: Sixty-seven Thoroughbred broodmares.Methods: Adrenocorticotropic hormone concentrations were measured in autumn.The broodmares were divided into 3 groups based on endogenous plasma ACTH concentration (low, <50 pg/mL; intermediate 50-100 pg/mL; and high >100 pg/mL) as recommended by the Equine Endocrinology Group. We compared these results with those of other blood tests, clinical examinations, subsequent conception, and frequency of normal delivery.Results: The numbers of horses per group (percentage) were 22 (32.8%), 20 (29.9%), and 25 (37.3%). The mean ± SD ages (years) were 11.1 ± 3.4, 12.1 ± 4.5, and 13.0 ± 4.3, with no significant difference among groups. Mean ± SD plasma cortisol concentrations (μg/dL) were 4.0 ± 1.6, 7.1 ± 1.4, and 7.6 ± 1.9, with the intermediate and high ACTH groups having significantly higher results than the low ACTH group (P < .001). Conception rates were 77.3%, 89.5%, and 56.5% and normal delivery rates were 77.2%, 84.2%, and 43.5% with the percentage of each significantly lower in the high ACTH group (P = .02, P = .008, respectively). Conclusions and Clinical Importance:The study group of infertile broodmares may include horses with PPID. The reproductive performance of the high ACTH group was significantly lower than the other groups. Early diagnosis and treatment of infertile broodmares by screening plasma ACTH concentrations could help improve reproductive performance.

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