The phenotype of a pig with monosomy X resembling Turner syndrome symptoms: a case report

The partial or complete loss of one X chromosome in humans causes Turner syndrome (TS), which is accompanied by a range of physical and reproductive pathologies. This article reports similarities between the phenotype of a pig with monosomy X and the symptoms of TS in humans. Born as the offspring o...

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Bibliographic Details
Published in:Journal of Reproduction and Development 2019, Vol.65(3), pp.231-237
Main Authors: UMEYAMA, Kazuhiro, NAKANO, Kazuaki, MATSUNARI, Hitomi, YAMADA, Takeshi, HASEGAWA, Koki, TANG, Kun, TOKUYAMA, Yuki, WATANABE, Masahito, NAGAYA, Masaki, NAGASHIMA, Hiroshi
Format: Article
Language:English
Subjects:
17β-Estradiol
Autopsy
Case reports
Estrus cycle
Follicles
Genetic disorders
Monosomy
Monosomy X
Original
Ornithine
Ovaries
Phenotypes
Physical characteristics
Pig
Reproductive system
Sexual maturity
Turner syndrome
Turner's syndrome
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Summary:The partial or complete loss of one X chromosome in humans causes Turner syndrome (TS), which is accompanied by a range of physical and reproductive pathologies. This article reports similarities between the phenotype of a pig with monosomy X and the symptoms of TS in humans. Born as the offspring of a male pig carrying a mutation in an X-chromosomal gene, ornithine transcarbamylase (OTC), the female pig (37,XO) was raised to the age of 36 months. This X-monosomic pig presented with abnormal physical characteristics including short stature, micrognathia, and skeletal abnormalities in the limbs. Furthermore, the female did not exhibit an estrous cycle, even after reaching the age of sexual maturity, and showed no ovarian endocrine activity except for an irregular increase in blood 17β-estradiol levels, which was seemingly attributable to sporadic follicular development. An autopsy at 36 months revealed an undeveloped reproductive tract with ovaries that lacked follicles. These data demonstrated that the growth processes and anatomical and physiological characteristics of an X-monosomic pig closely resembled those of a human with TS.
ISSN:0916-8818
1348-4400
DOI:10.1262/jrd.2018-143