Publications by authors named "Yoshiro Endo"

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  • The study compared two different winter management strategies for Thoroughbred weanlings and yearlings in Hokkaido, Japan: one group was kept outdoors for 22 hours (22hr group), while the other group had 7 hours outdoors with 1 hour of exercise on a horse-walker (7hr+W group).
  • Results showed that the 7hr+W group had similar daily travel distances as the 22hr group but exhibited better body weight gains, lower body temperature, and improved heart rate variability, indicating better overall metabolic health.
  • Endocrine analysis revealed that the 7hr+W group had higher levels of prolactin and insulin-like growth factor, suggesting that this management strategy is more effective for
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  • The study examined radiographic changes in the forelimbs of foals over the first year of life, focusing on specific angles related to hoof and joint alignment.
  • Key measurements showed significant increases in hoof angle and phalanx angles in the early weeks, indicating rapid developmental changes, while some angles decreased after reaching peak growth.
  • The findings suggest that foals initially have a flexed fetlock and upright hoof alignment, transitioning to a mature conformation by six months, with physiological variations linked to common diseases in foals.
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  • A 70-year-old man with a history of asthma and chronic sinusitis presented with severe symptoms including fever, limb numbness, blood in urine, and gastrointestinal bleeding, alongside abnormal blood results indicating eosinophilia and elevated IgG4 levels.
  • Diagnostic procedures showed significant airway lesions and inflammation, leading to a diagnosis of eosinophilic granulomatosis with polyangiitis (EGPA), and the patient was initially treated with steroids, which improved his condition.
  • However, after 18 months, the patient's symptoms and eosinophil levels worsened, prompting treatment with an anti-IL-5 antibody (mepolizumab), which successfully normalized his blood results and alleviated symptoms, highlighting the
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  • Researchers studied the lying behavior of Thoroughbred foals on breeding farms by using triaxial accelerometers attached to their hind limbs and halters to collect data every 10 seconds for 24 hours.
  • The analysis revealed that foals lie down more frequently and for longer durations during daytime pasturing compared to overnight pasturing, with significant differences in lateral lying and total lying time spent in stalls versus pastures.
  • Factors such as age, weather, and pasturing time were found to influence the foals' lying behavior, highlighting the potential of accelerometers for monitoring equine behavior in breeding management.
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Although radiographic findings at the apical portion of the proximal sesamoid bone (PSB) are often observed in young Thoroughbred foals, conflicting findings, either fractures or apparent secondary ossifications centers, have been reported. Three cases (aged 2, 5, and 7 weeks) were identified in 30 necropsied foals (0-31 weeks old). Histopathologically, the subchondral trabecular woven bone was fractured and exhibited focal necrosis of woven bone, fibrin exudate, and/or fibrosis within the foci.

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  • The study compared the effects of different climate conditions and light supplementation (LS) on the growth and hormonal changes in trained Thoroughbred yearling horses in Japan, focusing on those from Hokkaido (north) and Miyazaki (south).
  • Yearlings were divided into two groups (control and LS) with LS groups receiving extended daylight.
  • Findings indicated that Hokkaido yearlings had higher basal metabolism and lower initial growth parameters, but with LS, their hormone levels and growth metrics improved, aligning more closely with those from warmer Miyazaki.
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  • A study was conducted on 68 Thoroughbred racehorses to investigate the impact of a single dose of enrofloxacin (ERFX) on their health after long-distance transport.* -
  • Horses in the ERFX group (n=52) received an IV dose before a 21-hour transport, while the control group (n=16) received saline.* -
  • Results indicated that the ERFX group had significantly lower fever, white blood cell counts, and serum amyloid A levels compared to controls, suggesting ERFX effectively prevents transportation-related fever in these horses.*
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Oxidative stress has been reported to occur during surgery. It is important to reduce intraoperative oxidative stress to improve the postoperative prognosis. However, there are no reports regarding oxidative stress related to surgery in horses.

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  • The study aimed to assess the link between exercise and tendon injury in the superficial digital flexor tendon (SDFT) of young Thoroughbreds using Doppler imaging during training periods.
  • Twenty-four one- to two-year-old Thoroughbreds were examined using grey-scale and color Doppler imaging to monitor tendon health across different training months.
  • Results indicated that while increased color Doppler flows in the SDFT were observed alongside increased running distances, there were no signs of tendon injury, suggesting that elevated blood flow may not predict future tendon injuries in these horses.
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The performance of horses undergoing regular intense exercise is adversely affected by oxidative stress. Thus, it is important to increase antioxidant production in horses in order to reduce oxidative stress. Ozonated autohemotherapy (OAHT) reportedly promotes antioxidant production.

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Non-primate hepacivirus (NPHV) is a recently discovered homolog of the hepatitis C virus in horses. The frequency and distribution of NPHV infections among horses in Japan is unknown. In this study, serum samples from 453 horses across Japan were screened for NPHV RNA using real-time RT-PCR and anti-nonstructural 3 protein (NS3) antibodies using the Gaussia luciferase immunoprecipitation system assay.

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The present study evaluated the effects of single-dose marbofloxacin in protecting horses against fever associated with transportation using 48 healthy Thoroughbreds. All horses were premedicated with interferon-α (0.5 U/kg, sublingually, every 24 hr) for 2 days before transportation and on the day of transportation.

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The present study evaluated the effects of single-dose filgrastim on hematology in 16 healthy horses after long-distance transportation. Horses were assigned to receive filgrastim (0.23 µg/kg, SC, once; G-CSF group; n=8) or saline (0.

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In order to reveal the preventive effect of marbofloxacin (MRFX) administration just before transportation, we compared the occurrence of transportation-associated fever before and after introduction of MRFX administration. After the introduction of prophylactic MRFX administration, the rectal temperatures of horses after transportation were significantly lower than before the introduction of MRFX administration (P<0.01) and the number of febrile horses was significantly lower than before the introduction of MRFX administration (P<0.

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  • * Key findings include growth patterns in fetal indices like crown rump length (CRL), fetal heart rate (FHR), and the combined thickness of the uterus and placenta (CTUP) throughout gestation.
  • * Results indicate that regular ultrasound can provide valuable insights into normal fetal development, despite its infrequent use in equine reproductive practices.
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  • Equine bone scintigraphy is typically done with horses standing and sedated, but movement can lead to lower quality images.
  • A study evaluated the effectiveness of motion correction (MC) processing in improving image quality, finding that MC significantly enhanced evaluation scores across all observers.
  • The use of MC not only improves image quality but also reduces acquisition time, which leads to decreased radiation exposure for healthcare staff involved in the procedure.
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Objective: To evaluate effects of a single dose of enrofloxacin (5 mg/kg, IV) on body temperature and tracheobronchial neutrophil count in healthy Thoroughbreds premedicated with interferon-α and undergoing long-distance transportation.

Animals: 32 healthy Thoroughbreds.

Procedures: All horses received interferon-α (0.

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  • - A Thoroughbred colt with unclear genital characteristics was examined, revealing a backward-facing short penis and tests that were histologically normal.
  • - Hormonal measurements of luteinizing hormone, follicle stimulating hormone, testosterone, and ir-inhibin showed a gradual increase starting in April.
  • - Genetic tests confirmed a mosaic karyotype (63,XO/64,XY), and the findings contribute to understanding chromosomal abnormalities and sex development disorders in horses.
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Prevalence of equine gastric ulcer syndrome in 85 young Thoroughbreds was investigated. The presence of gastric ulcers was confirmed in 27.1% (23/85) of the horses by endoscopic examination.

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The purpose of this study was to observe the changes in body temperature before parturition using a wireless temperature monitoring device (WTMD) and to evaluate the usefulness of body temperature measurements using a digital rectal thermometer (DRT) and a microchip transponder thermometry device (MTTD) for predicting parturition in mares. The body temperatures using a WTMD at 0 hr and -1 hr were significantly different from those at the same time on Days 1-5 (P<0.01).

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Myostatin is a member of the transforming growth factor-β family with a key role in inhibition of muscle growth by negative regulation of both myoblast proliferation and differentiation. Recently, a genomic region on ECA18, which includes the MSTN gene, was identified as a candidate region influencing racing performance in Thoroughbreds. In this study, four SNPs on ECA18, g.

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Aim: To examine the effects of inhaled procaterol (Meptin Air : MA), a short-acting beta2-agonist, for proactive use rather than rescue use in dyspnea and health-related quality of life in patients with chronic obstructive pulmonary disease (COPD), who complained of dyspnea in daily activities despite treatment with long-acting bronchodilators.

Methods: Patients with moderate to most severe COPD who were on maintenance therapy with tiotropium and other long-acting bronchodilators were studied. Severity of dyspnea was evaluated with the Shortness of Breath Questionnaire (SOBQ) and patients were recommended to use MA on an as-needed basis before daily activities which had caused dyspnea.

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