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

Kazuhiro Umeyama, Kazuaki Nakano, Hitomi Matsunari, Takeshi Yamada, Koki Hasegawa, Kun Tang, Yuki Tokuyama, Masahito Watanabe, Masaki Nagaya, Hiroshi Nagashima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)231-237
Number of pages7
JournalJournal of Reproduction and Development
Volume65
Issue number3
DOIs
Publication statusPublished - 2019

Keywords

  • Monosomy X
  • Pig
  • Turner syndrome

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