Key Points
-
The critical testis-determining genes are Sry and Sox9; however, many genes upstream of Sry and downstream of Sry and Sox9 are also important for correct testis development
-
Novel factors have been identified in the known pathways of the testis-determining network, including Six1, Six4, Map3k4, Gadd45g and Hhat
-
Ovarian development lacks a single genetic switch; however, genes such as Rspo1, Foxl2, Wnt4 and Ctnnb1 seem to be essential for correct ovary development
-
Both the testis-determining and ovary-determining pathways have active gene networks that must be maintained throughout life by suppression of the opposing pathway
-
As well as regulation of gene expression by transcription factors, other types of gene control, such as noncoding RNAs and epigenetic modification, are required for gonad development
Abstract
Sex-specific gonadal development starts with formation of the bipotential gonad, which then differentiates into either a mature testis or an ovary. This process is dependent on activation of either the testis-specific or the ovary-specific pathway while the opposite pathway is continuously repressed. A network of transcription factors tightly regulates initiation and maintenance of these distinct pathways; disruption of these networks can lead to disorders of sex development in humans and male-to-female or female-to-male sex reversal in mice. Sry is the Y-linked master switch that is both required and sufficient to drive the testis-determining pathway. Another key component of the testis pathway is Sox9, which acts immediately downstream of Sry. In contrast to the testis pathway, no single sex-determining factor has been identified in the ovary pathway; however, multiple genes, such as Foxl2, Rspo1, Ctnnb1, and Wnt4, seem to work synergistically and in parallel to ensure proper ovary development. Our understanding of the regulatory networks that underpin testis and ovary development has grown substantially over the past two decades.
This is a preview of subscription content, access via your institution
Relevant articles
Open Access articles citing this article.
-
Dynamic transcriptome analysis reveals the gene network of gonadal development from the early history life stages in dwarf surfclam Mulinia lateralis
Biology of Sex Differences Open Access 02 December 2022
-
MiR-34b/c play a role in early sex differentiation of Amur sturgeon, Acipenser schrenckii
Frontiers in Zoology Open Access 26 September 2022
-
Roles and action mechanisms of WNT4 in cell differentiation and human diseases: a review
Cell Death Discovery Open Access 12 October 2021
Access options
Subscribe to this journal
Receive 12 print issues and online access
$189.00 per year
only $15.75 per issue
Rent or buy this article
Get just this article for as long as you need it
$39.95
Prices may be subject to local taxes which are calculated during checkout




References
Biason-Lauber, A. Control of sex development. Best Pract. Res. Clin. Endocrinol. Metab. 24, 163–186 (2010).
Wainwright, E. N. et al. SOX9 regulates microRNA miR2025p/3p expression during mouse testis differentiation. Biol. Reprod. 89, 34 (2013).
Kuroki, S. et al. Epigenetic regulation of mouse sex determination by the histone demethylase Jmjd1a. Science 341, 1106–1109 (2013).
Bosze, P., Szabo, D., Laszlo, J. & Gaal, M. Ultrastructure of the fibrous tissue of the streak gonads. Acta Med. Acad. Sci. Hung. 39, 133–135 (1982).
Miyamoto, N., Yoshida, M., Kuratani, S., Matsuo, I. & Aizawa, S. Defects of urogenital development in mice lacking Emx2. Development 124, 1653–1664 (1997).
Birk, O. S. et al. The LIM homeobox gene Lhx9 is essential for mouse gonad formation. Nature 403, 909–913 (2000).
Wilhelm, D. & Englert, C. The Wilms tumor suppressor WT1 regulates early gonad development by activation of Sf1. Genes Dev. 16, 1839–1851 (2002).
Val, P., Lefrancois-Martinez, A. M., Veyssiere, G. & Martinez, A. SF1 a key player in the development and differentiation of steroidogenic tissues. Nucl. Recept. 1, 8 (2003).
Luo, X., Ikeda, Y. & Parker, K. L. A cell-specific nuclear receptor is essential for adrenal and gonadal development and sexual differentiation. Cell 77, 481–490 (1994).
Sekido, R. & Lovell-Badge, R. Sex determination involves synergistic action of SRY and SF1 on a specific Sox9 enhancer. Nature 453, 930–934 (2008).
Nachtigal, M. W. et al. Wilms' tumor 1 and Dax1 modulate the orphan nuclear receptor SF1 in sex-specific gene expression. Cell 93, 445–454 (1998).
Kreidberg, J. A. et al. WT1 is required for early kidney development. Cell 74, 679–691 (1993).
Hammes, A. et al. Two splice variants of the Wilms' tumor 1 gene have distinct functions during sex determination and nephron formation. Cell 106, 319–329 (2001).
Katoh-Fukui, Y. et al. Male-to-female sex reversal in M33 mutant mice. Nature 393, 688–692 (1998).
Katoh-Fukui, Y. et al. Cbx2, a polycomb group gene, is required for Sry gene expression in mice. Endocrinology 153, 913–924 (2012).
Lefebvre, V., Dumitriu, B., Penzo-Mendez, A., Han, Y. & Pallavi, B. Control of cell fate and differentiation by Sry-related high-mobility-group box (Sox) transcription factors. Int. J. Biochem. Cell Biol. 39, 2195–2214 (2007).
Sarkar, A. & Hochedlinger, K. The Sox family of transcription factors: versatile regulators of stem and progenitor cell fate. Cell Stem Cell 12, 15–30 (2013).
Chew, L. J. & Gallo, V. The Yin and Yang of Sox proteins: activation and repression in development and disease. J. Neurosci. Res. 87, 3277–3287 (2009).
Sinclair, A. H. et al. A gene from the human sex-determining region encodes a protein with homology to a conserved DNA-binding motif. Nature 346, 240–244 (1990).
Berta, P. et al. Genetic evidence equating SRY and the testis-determining factor. Nature 348, 448–450 (1990).
Koopman, P., Gubbay, J., Vivian, N., Goodfellow, P. & Lovell-Badge, R. Male development of chromosomally female mice transgenic for Sry. Nature 351, 117–121 (1991).
Koopman, P., Munsterberg, A., Capel, B., Vivian, N. & Lovell-Badge, R. Expression of a candidate sex-determining gene during mouse testis differentiation. Nature 348, 450–452 (1990).
Hacker, A., Capel, B., Goodfellow, P. & Lovell-Badge, R. Expression of Sry, the mouse sex determining gene. Development 121, 1603–1614 (1995).
Kent, J., Wheatley, S. C., Andrews, J. E., Sinclair, A. H. & Koopman, P. A male-specific role for SOX9 in vertebrate sex determination. Development 122, 2813–2822 (1996).
Morais da Silva, S. et al. Sox9 expression during gonadal development implies a conserved role for the gene in testis differentiation in mammals and birds. Nat. Genet. 14, 62–68 (1996).
Sekido, R., Bar, I., Narvaez, V., Penny, G. & Lovell-Badge, R. SOX9 is up-regulated by the transient expression of SRY specifically in Sertoli cell precursors. Dev. Biol. 274, 271–279 (2004).
Chaboissier, M. C. et al. Functional analysis of Sox8 and Sox9 during sex determination in the mouse. Development 131, 1891–1901 (2004).
Barrionuevo, F. et al. Homozygous inactivation of Sox9 causes complete XY sex reversal in mice. Biol. Reprod. 74, 195–201 (2006).
Bishop, C. E. et al. A transgenic insertion upstream of Sox9 is associated with dominant XX sex reversal in the mouse. Nat. Genet. 26, 490–494 (2000).
Vidal, V. P., Chaboissier, M. C., de Rooij, D. G. & Schedl, A. Sox9 induces testis development in XX transgenic mice. Nat. Genet. 28, 216–217 (2001).
Barrionuevo, F. et al. Testis cord differentiation after the sex determination stage is independent of Sox9 but fails in the combined absence of Sox9 and Sox8. Dev. Biol. 327, 301–312 (2009).
Gordon, C. T. et al. Long-range regulation at the SOX9 locus in development and disease. J. Med. Genet. 46, 649–656 (2009).
Poirier, C. et al. A complex interaction of imprinted and maternal-effect genes modifies sex determination in Odd Sex (Ods) mice. Genetics 168, 1557–1562 (2004).
Mead, T. J. et al. A far-upstream (70 kb) enhancer mediates Sox9 auto-regulation in somatic tissues during development and adult regeneration. Nucleic Acids Res. 41, 4459–4469 (2013).
Arango, N. A., Lovell-Badge, R. & Behringer, R. R. Targeted mutagenesis of the endogenous mouse Mis gene promoter: in vivo definition of genetic pathways of vertebrate sexual development. Cell 99, 409–419 (1999).
Wilson, M. J., Jeyasuria, P., Parker, K. L. & Koopman, P. The transcription factors steroidogenic factor1 and SOX9 regulate expression of Vanin1 during mouse testis development. J. Biol. Chem. 280, 5917–5923 (2005).
Wilhelm, D. et al. SOX9 regulates prostaglandin D synthase gene transcription in vivo to ensure testis development. J. Biol. Chem. 282, 10553–10560 (2007).
Bradford, S. T. et al. The cerebellin 4 precursor gene is a direct target of SRY and SOX9 in mice. Biol. Reprod. 80, 1178–1188 (2009).
Meeks, J. J., Weiss, J. & Jameson, J. L. Dax1 is required for testis determination. Nat. Genet. 34, 32–33 (2003).
Swain, A., Narvaez, V., Burgoyne, P., Camerino, G. & Lovell-Badge, R. Dax1 antagonizes Sry action in mammalian sex determination. Nature 391, 761–767 (1998).
Bouma, G. J. et al. Gonadal sex reversal in mutant Dax1 XY mice: a failure to upregulate Sox9 in pre-Sertoli cells. Development 132, 3045–3054 (2005).
Rojek, A., Obara-Moszynska, M., Malecka, E., Slomko-Jozwiak, M. & Niedziela, M. NR0B1 (DAX1) mutations in patients affected by congenital adrenal hypoplasia with growth hormone deficiency as a new finding. J. Appl. Genet. 54, 225–30 (2013).
Bardoni, B. et al. A dosage sensitive locus at chromosome Xp21 is involved in male to female sex reversal. Nat. Genet. 7, 497–501 (1994).
Ludbrook, L. M. & Harley, V. R. Sex determination: a 'window' of DAX1 activity. Trends Endocrinol. Metab. 15, 116–121 (2004).
Sock, E., Schmidt, K., Hermanns-Borgmeyer, I., Bosl, M. R. & Wegner, M. Idiopathic weight reduction in mice deficient in the high-mobility-group transcription factor Sox8. Mol. Cell. Biol. 21, 6951–6959 (2001).
O'Bryan, M. K. et al. Sox8 is a critical regulator of adult Sertoli cell function and male fertility. Dev. Biol. 316, 359–370 (2008).
Polanco, J. C., Wilhelm, D., Davidson, T. L., Knight, D. & Koopman, P. Sox10 gain-of-function causes XX sex reversal in mice: implications for human 22q-linked disorders of sex development. Hum. Mol. Genet. 19, 506–516 (2010).
Tevosian, S. G. et al. Gonadal differentiation, sex determination and normal Sry expression in mice require direct interaction between transcription partners GATA4 and FOG2. Development 129, 4627–4634 (2002).
Bradford, S. T. et al. A cell-autonomous role for WT1 in regulating Sry in vivo. Hum. Mol. Genet. 18, 3429–3438 (2009).
Capel, B. Sex in the 90s: SRY and the switch to the male pathway. Annu. Rev. Physiol. 60, 497–523 (1998).
de Santa Barbara, P. et al. Steroidogenic factor-1 contributes to the cyclic-adenosine monophosphate down-regulation of human SRY gene expression. Biol. Reprod. 64, 775–783 (2001).
Pilon, N. et al. Porcine SRY promoter is a target for steroidogenic factor 1. Biol. Reprod. 68, 1098–1106 (2003).
Kuo, C. T. et al. GATA4 transcription factor is required for ventral morphogenesis and heart tube formation. Genes Dev. 11, 1048–1060 (1997).
Molkentin, J. D., Lin, Q., Duncan, S. A. & Olson, E. N. Requirement of the transcription factor GATA4 for heart tube formation and ventral morphogenesis. Genes Dev. 11, 1061–1072 (1997).
Tevosian, S. G. et al. FOG2, a cofactor for GATA transcription factors, is essential for heart morphogenesis and development of coronary vessels from epicardium. Cell 101, 729–739 (2000).
Manuylov, N. L., Smagulova, F. O., Leach, L. & Tevosian, S. G. Ovarian development in mice requires the GATA4–FOG2 transcription complex. Development 135, 3731–3743 (2008).
Manuylov, N. L. et al. Conditional ablation of Gata4 and Fog2 genes in mice reveals their distinct roles in mammalian sexual differentiation. Dev. Biol. 353, 229–241 (2011).
Kawakami, K., Sato, S., Ozaki, H. & Ikeda, K. Six family genes–structure and function as transcription factors and their roles in development. Bioessays 22, 616–626 (2000).
Anderson, A. M., Weasner, B. M., Weasner, B. P. & Kumar, J. P. Dual transcriptional activities of SIX proteins define their roles in normal and ectopic eye development. Development 139, 991–1000 (2012).
Fujimoto, Y. et al. Homeoproteins Six1 and Six4 regulate male sex determination and mouse gonadal development. Dev. Cell 26, 416–430 (2013).
Bogani, D. et al. Loss of mitogen-activated protein kinase kinase kinase 4 (MAP3K4) reveals a requirement for MAPK signalling in mouse sex determination. PLoS Biol. 7, e1000196 (2009).
Sekido, R. & Lovell-Badge, R. Sex determination and SRY: down to a wink and a nudge? Trends Genet. 25, 19–29 (2009).
Gierl, M. S., Gruhn, W. H., von Seggern, A., Maltry, N. & Niehrs, C. GADD45G functions in male sex determination by promoting p38 signaling and Sry expression. Dev. Cell 23, 1032–1042 (2012).
Warr, N. et al. Gadd45γ and Map3k4 interactions regulate mouse testis determination via p38 MAPK-mediated control of Sry expression. Dev. Cell 23, 1020–1031 (2012).
Hoffmeyer, A., Piekorz, R., Moriggl, R. & Ihle, J. N. Gadd45γ is dispensable for normal mouse development and Tcell proliferation. Mol. Cell. Biol. 21, 3137–3143 (2001).
Nef, S. et al. Testis determination requires insulin receptor family function in mice. Nature 426, 291–295 (2003).
Pitetti, J. L. et al. Insulin and IGF1 receptors are essential for XX and XY gonadal differentiation and adrenal development in mice. PLoS Genet. 9, e1003160 (2013).
Foster, J. W. et al. Evolution of sex determination and the Y chromosome: SRY-related sequences in marsupials. Nature 359, 531–533 (1992).
Graves, J. A. From brain determination to testis determination: evolution of the mammalian sex-determining gene. Reprod. Fertil. Dev. 13, 665–672 (2001).
Hughes, J. F. et al. Strict evolutionary conservation followed rapid gene loss on human and rhesus Y chromosomes. Nature 483, 82–86 (2012).
Murtagh, V. J. et al. Evolutionary history of novel genes on the tammar wallaby Y chromosome: implications for sex chromosome evolution. Genome Res. 22, 498–507 (2012).
Laumonnier, F. et al. Transcription factor SOX3 is involved in X-linked mental retardation with growth hormone deficiency. Am. J. Hum. Genet. 71, 1450–1455 (2002).
Sutton, E. et al. Identification of SOX3 as an XX male sex reversal gene in mice and humans. J. Clin. Invest. 121, 328–341 (2011).
Briscoe, J. & Therond, P. P. The mechanisms of Hedgehog signalling and its roles in development and disease. Nat. Rev. Mol. Cell Biol. 14, 416–429 (2013).
Bitgood, M. J., Shen, L. & McMahon, A. P. Sertoli cell signaling by desert hedgehog regulates the male germline. Curr. Biol. 6, 298–304 (1996).
Yao, H. H., Whoriskey, W. & Capel, B. Desert hedgehog/patched 1 signaling specifies fetal Leydig cell fate in testis organogenesis. Genes Dev. 16, 1433–1440 (2002).
Beverdam, A. & Koopman, P. Expression profiling of purified mouse gonadal somatic cells during the critical time window of sex determination reveals novel candidate genes for human sexual dysgenesis syndromes. Hum. Mol. Genet. 15, 417–431 (2006).
Clark, A. M., Garland, K. K. & Russell, L. D. Desert hedgehog (Dhh) gene is required in the mouse testis for formation of adult-type Leydig cells and normal development of peritubular cells and seminiferous tubules. Biol. Reprod. 63, 1825–1838 (2000).
Pierucci-Alves, F., Clark, A. M. & Russell, L. D. A developmental study of the desert hedgehog-null mouse testis. Biol. Reprod. 65, 1392–1402 (2001).
Callier, P. et al. Loss of function mutation in the palmitoyl-transferase HHAT leads to syndromic 46,XY disorder of sex development by impeding Hedgehog protein palmitoylation and signaling. PLoS Genet. 10, e1004340 (2014).
Ottolenghi, C. et al. Foxl2 is required for commitment to ovary differentiation. Hum. Mol. Genet. 14, 2053–2062 (2005).
Pailhoux, E. et al. A 11.7kb deletion triggers intersexuality and polledness in goats. Nat. Genet. 29, 453–458 (2001).
Boulanger, L. et al. FOXL2 is a female sex-determining gene in the goat. Curr. Biol. 24, 404–408 (2014).
Uhlenhaut, N. H. et al. Somatic sex reprogramming of adult ovaries to testes by FOXL2 ablation. Cell 139, 1130–1142 (2009).
Chassot, A. A. et al. Activation of β-catenin signaling by Rspo1 controls differentiation of the mammalian ovary. Hum. Mol. Genet. 17, 1264–1277 (2008).
Maatouk, D. M. et al. Stabilization of β-catenin in XY gonads causes male-to-female sex-reversal. Hum. Mol. Genet. 17, 2949–2955 (2008).
Blecher, S. R. & Erickson, R. P. Genetics of sexual development: a new paradigm. Am. J. Med. Genet. A 143A, 3054–3068 (2007).
Biason-Lauber, A. WNT4, RSPO1, and FOXL2 in sex development. Semin. Reprod. Med. 30, 387–395 (2012).
McElreavey, K., Vilain, E., Abbas, N., Herskowitz, I. & Fellous, M. A regulatory cascade hypothesis for mammalian sex determination: SRY represses a negative regulator of male development. Proc. Natl Acad. Sci. USA 90, 3368–3372 (1993).
Matson, C. K. et al. DMRT1 prevents female reprogramming in the postnatal mammalian testis. Nature 476, 101–104 (2011).
Minkina, A. et al. DMRT1 protects male gonadal cells from retinoid-dependent sexual transdifferentiation. Dev. Cell 29, 511–520 (2014).
Takasawa, K. et al. FOXL2 transcriptionally represses Sf1 expression by antagonizing WT1 during ovarian development in mice. FASEB J. 28, 2020–2028 (2014).
Piprek, R. P. Genetic mechanisms underlying male sex determination in mammals. J. Appl. Genet. 50, 347–360 (2009).
Kim, Y. et al. Fgf9 and Wnt4 act as antagonistic signals to regulate mammalian sex determination. PLoS Biol. 4, e187 (2006).
Jameson, S. A., Lin, Y. T. & Capel, B. Testis development requires the repression of Wnt4 by Fgf signaling. Dev. Biol. 370, 24–32 (2012).
Real, F. M. et al. A microRNA (mmumiR124) prevents Sox9 expression in developing mouse ovarian cells. Biol. Reprod. 89, 78 (2013).
Rakoczy, J. et al. MicroRNAs1405p/140–143p modulate Leydig cell numbers in the developing mouse testis. Biol. Reprod. 88, 143 (2013).
Raymond, C. S., Murphy, M. W., O'Sullivan, M. G., Bardwell, V. J. & Zarkower, D. Dmrt1, a gene related to worm and fly sexual regulators, is required for mammalian testis differentiation. Genes Dev. 14, 2587–2595 (2000).
Warr, N. et al. Minor abnormalities of testis development in mice lacking the gene encoding the MAPK signalling component, MAP3K1. PLoS ONE 6, e19572 (2011).
Weiss, J. et al. Sox3 is required for gonadal function, but not sex determination, in males and females. Mol. Cell. Biol. 23, 8084–8091 (2003).
Bouma, G. J., Washburn, L. L., Albrecht, K. H. & Eicher, E. M. Correct dosage of Fog2 and Gata4 transcription factors is critical for fetal testis development in mice. Proc. Natl Acad. Sci. USA 104, 14994–14999 (2007).
Tomizuka, K. et al. R-spondin1 plays an essential role in ovarian development through positively regulating Wnt-4 signaling. Hum. Mol. Genet. 17, 1278–1291 (2008).
Vainio, S., Heikkila, M., Kispert, A., Chin, N. & McMahon, A. P. Female development in mammals is regulated by Wnt-4 signalling. Nature 397, 405–409 (1999).
Acknowledgements
The authors' research work was supported by The National Health and Medical Research Council, Australia (program grant #546517 and project grant #1031214); the Helen Macpherson Smith Trust (partnership grant #6846); the Ian Potter Centre for Genomics and Personalised Medicine; and the Victorian Government's Operational Infrastructure Support Program.
Author information
Authors and Affiliations
Contributions
All authors contributed equally to all aspects of this manuscript.
Corresponding author
Ethics declarations
Competing interests
The authors declare no competing financial interests.
Rights and permissions
About this article
Cite this article
Eggers, S., Ohnesorg, T. & Sinclair, A. Genetic regulation of mammalian gonad development. Nat Rev Endocrinol 10, 673–683 (2014). https://doi.org/10.1038/nrendo.2014.163
Published:
Issue Date:
DOI: https://doi.org/10.1038/nrendo.2014.163
This article is cited by
-
MiR-34b/c play a role in early sex differentiation of Amur sturgeon, Acipenser schrenckii
Frontiers in Zoology (2022)
-
Dynamic transcriptome analysis reveals the gene network of gonadal development from the early history life stages in dwarf surfclam Mulinia lateralis
Biology of Sex Differences (2022)
-
Roles and action mechanisms of WNT4 in cell differentiation and human diseases: a review
Cell Death Discovery (2021)
-
GATA4/6 regulate DHH transcription in rat adrenocortical autografts
Scientific Reports (2020)
-
Sex and the TEs: transposable elements in sexual development and function in animals
Mobile DNA (2019)