卵精巣
WordNet
- hermaphroditic gonad that contains both testicular and ovarian tissue
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2017/10/30 01:36:52」(JST)
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An ovotestis is a gonad with both testicular and ovarian aspects.[1][2] In humans, ovotestes are an anatomical abnormality associated with gonadal dysgenesis.[3] In invertebrates that are normally hermaphroditic, such as most gastropods (snails and slugs) in the clade Eupulmonata, an ovotestis is a common feature of the reproductive anatomy.
In mice, ovotestes are structured such that the central region is testicular tissue while the poles both contain ovarian tissue. Experiments involving the Sox9 gene, which is initiated by the SRY region of the Y chromosome, have shown the gene’s requirement for testicular differentiation from the presence of ovotestis formation within XX Sox9 trangenic mice. (6) Ovotestis within B6-XYPOS mice allow for gonadal development research within the same tissue to take place in ways previously unavailable. [4] [5]
In gastropods
The ovotestis of the freshwater snail
Biomphalaria glabrata. The area around the ovotestis is the hepatopancreas. (10× magnification)
An ovotestis or hermaphroditic gland (in Latin language: glandula hermaphroditica),[6] is found as normal anatomical feature in the reproductive system of some gastropods including such species as the land snail Helix aspersa.[7]
See also
- Intersex
- True hermaphroditism
References
- ^ "eMedicine - Ovotestis : Article by Gail F Whitman-Elia, MD". Retrieved 2008-01-02.
- ^ "ovo-testes (formerly called "true hermaphroditism")". Intersex Society of North America. Retrieved 2007-12-08.
- ^ Salas-Cortés L, Jaubert F, Nihoul-Feketé C, Brauner R, Rosemblatt M, Fellous M (2000). "SRY protein is expressed in ovotestis and streak gonads from human sex-reversal". Cytogenet. Cell Genet. 91 (1–4): 212–6. PMID 11173859. doi:10.1159/000056847.
- ^ Gregoire EP et al. (2011). “Transient development of ovotestes in XX Sox9 transgenic mice.” Dev Biol. 394(1):65-77
- ^ Wilhelm D, Washburn LL, Truong V, Fellous M, Eicher EM, Koopman P. Antagonism of the testis- and ovary-determining pathways during ovotestis development in mice. Mechanisms of development. 2009;126(5-6):324-336.
- ^ (in Hungarian) Páll-Gergely B. (2008). "A Stylommatophora csigák ivarszervrendszerének magyar nyelvű nevezéktana". Malacological Newsletter 26: 37-42. PDF.
- ^ Chase R, Antkowiak T, Geoffroy E, Weatherill D (2004). "Why the ovotestis of Helix aspersa is innervated". Acta Biol. Hung. 55 (1–4): 239–49. PMID 15270240. doi:10.1556/ABiol.55.2004.1-4.29.
UpToDate Contents
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- 1. 外性器異常(性分化疾患)のある乳児のマネージメントmanagement of the infant with atypical genitalia disorder of sex development [show details]
…is an extremely rare form of DSD in which both male and female gonadal tissue (testis, ovary, or ovotestis) and male and female internal and external structures coexist. The testes are most often found on …
- 2. 性分化疾患の原因causes of disorders of sex development [show details]
…gonad (a gonad that is so dysgenetic that it is not readily recognizable as a testis or ovary) An ovotestis (very rare) Also, the two gonads may develop differently. "Mixed gonadal dysgenesis" refers to…
- 3. 思春期に生じる多嚢胞性卵巣症候群の定義、臨床的特徴、および鑑別診断definition clinical features and differential diagnosis of polycystic ovary syndrome in adolescents [show details]
…of sex development – Rarely, phenotypic females have mixed ovarian and testicular tissue (either ovotestis, or ovary and testis). The development of the internal and external genitalia in these adolescents…
English Journal
- XX SRY-Negative True Hermaphrodism in Two Dogs: Clinical, Morphological, Genetic and Cytogenetic Studies.
- Groppetti D, Genualdo V, Bosi G, Pecile A, Iannuzzi A, Perucatti A, De Lorenzi L, Parma P, Arrighi S.SourceDepartment of Veterinary Clinical Science, Reproduction Unit, Universita degli Studi di Milano, Milan, Italy.
- Sexual development : genetics, molecular biology, evolution, endocrinology, embryology, and pathology of sex determination and differentiation.Sex Dev.2011 Sep 13. [Epub ahead of print]
- This work aimed at giving a deeper insight into peculiar cases of intersexuality occurring in dogs and known as XX true hermaphrodism due to the existence of both testicular and ovarian tissue in one or both gonads in the presence of an XX chromosome constitution. Clinical, histological and genetic
- PMID 21921586
- Mode of sexual differentiation and its influence on the relative sensitivity of the fathead minnow and zebrafish in the fish sexual development test.
- Thorpe KL, A Marca Pereira ML, Schiffer H, Burkhardt-Holm P, Weber K, Wheeler JR.SourceProgramme MGU, Department of Environmental Sciences, University of Basel, Basel, Switzerland; Department of Biology, University of Prince Edward Island, Charlottetown, Canada.
- Aquatic toxicology (Amsterdam, Netherlands).Aquat Toxicol.2011 Jul 23;105(3-4):412-420. [Epub ahead of print]
- Exogenous treatment of fish with natural sex hormones and their mimics has been shown to influence gonadal differentiation resulting in biased phenotypic sex-ratios. This has lead to the development of the Fish Sexual Development Test (FSDT) as a method for the detection of endocrine active chemical
- PMID 21831347
Japanese Journal
- Bilateral Ovotestes in a Female Beagle Dog
- KOBAYASHI Kinji,FUJIWARA Toshihisa,ADACHI Tamiko,ASAHINA Masatoshi,SASAKI Yoshifumi,MATSUDA Aoi,NISHIMURA Tomonari,INUI Toshihide,KITAMURA Kazuyuki
- Journal of toxicologic pathology 20(2), 111-115, 2007-06-30
- … PCR using DNA extracted from paraffin-embedded sections of the testicular parts of the ovotestis, uteri and spleen showed that the organogenesis of ovotestes in this case was not associated with the sex-determining region Y gene. …
- NAID 10025854250
- 内分泌かく乱物質問題の解明のための Ecotoxicogenomics の重要性
- 井口 泰泉
- 日本衞生學雜誌 61(1), 11-18, 2006-01-15
- … An environmental androgen, trenbolone, was found to induce persistent changes in the gonopodium and ovotestis in mosquito fish. …
- NAID 10017240727
Related Links
- Ovotestis refers to the histology of a gonad that contains both ovarian follicles and testicular tubular elements. Such gonads are found exclusively in people with ovotesticular disorder of sexual development (OT-DSD ...
- ovotestisとは。意味や和訳。[名詞] 〔動物〕 卵精巣,両性巣(hermaphroditic organ):大部分の腹足類の生殖巣のように,卵巣と精巣を持っていて,卵と精子を作るもの.[語源]1877 - 80万項目以上収録、例文・コロケーションが豊富な無料 ...
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- 英
- ovotestis
-ovotestis