An ovotestis is a gonad with both testicular and ovarian aspects.[1][2] In humans, ovotestes are an infrequent anatomical variation associated with gonadal dysgenesis.[3] The only mammals where ovotestes are not symptomatic of a disorder are moles, wherein females possess ovotestes along with a masculinized clitoris. These ovotestes in nonpregnant female moles secrete eight times as much testosterone as the ovotestes of pregnant moles.[4] 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.[5][6]
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Transcription
In gastropods
An ovotestis or hermaphroditic gland (Latin: glandula hermaphroditica),[7] is found as normal anatomical feature in the reproductive system of some gastropods including such species as the land snail Cornu aspersum.[8]
People with ovotestis
See also
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. doi:10.1159/000056847. PMID 11173859. S2CID 32843904.
- ^ Whitworth, Deanne; Licht, Paul; Racey, Paul; Glickman, Stephen (1999-02-01). "Testis-Like Steroidogenesis in the Ovotestis of the European Mole, Talpa europaea". Biology of Reproduction. 60 (2): 413–418. doi:10.1095/biolreprod60.2.413. PMID 9916009.
- ^ 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.
- ^ Páll-Gergely, Barna (2008). "A Stylommatophora csigák ivarszervrendszerének magyar nyelvű nevezéktana" (PDF). Malacological Newsletter (in Hungarian). 26: 37–42.
- ^ 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. doi:10.1556/ABiol.55.2004.1-4.29. PMID 15270240. S2CID 15967000.
- ^ ""А не догадается ли она, что со мной что-то "не так"?": Интерсекс-люди о своём сексуальном опыте". Wonderzine. 2021-02-19. Retrieved 2021-03-21.
This page was last edited on 24 April 2024, at 23:20