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Spontaneous Age-Related Histopathological Changes in Microminipigs.
Akihisa Kangawa1, Toshiaki Nishimura2, Takashi Nishimura2
1Swine and Poultry Department, Shizuoka Prefectural Research Institute of Animal Industry, Swine and Poultry Research Center, Shizuoka, Japan.
Toxicologic Pathology
|July 25, 2019
Summary
Microminipigs show spontaneous age-related lesions, including amyloid deposits and arterial changes, from 4-6 years old. This study provides essential histopathological data for future toxicity evaluations in this animal model.
Area of Science:
- Veterinary Pathology
- Comparative Pathology
- Toxicological Pathology
Background:
- Microminipigs are increasingly used in toxicology, pharmacology, and disease modeling.
- Spontaneous age-related lesions are well-documented in other species but scarce in minipigs.
Purpose of the Study:
- To investigate spontaneous age-related histopathological changes in microminipigs.
- To establish a baseline for age-associated pathology in this model.
Main Methods:
- Histopathological examination of 37 microminipigs (6 months to 10 years old).
- Analysis of spontaneous lesions across various organs.
Main Results:
- Amyloid deposits, hyaline droplets, and neuronal inclusions observed from 6 years of age.
- Arterial sclerosing and proliferative lesions noted from 4 years of age.
- Neoplasms (renal adenoma, uterine leiomyoma, Leydig cell tumor) and other degenerative changes (glomerulosclerosis, fibrosis, involution) identified in aging animals.
Conclusions:
- Microminipigs exhibit distinct spontaneous age-related histopathological changes.
- This data serves as a crucial reference for interpreting toxicity studies in microminipigs.
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