ABSTRACT
Although cell-autonomous genetic programs pursued by germ and somatic cells are of critical import, intimate interplays between the two cell types are also essential for normal development of the female gonad. Recent studies demonstrate that oocytes play active roles in coordinating the growth and differentiation of somatic cells during folliculogenesis and affect successful outcomes at fertilization and early development. Mouse transgenesis has been particularly useful in defining germ-cell specific genes and their roles in folliculogenesis (e.g., Dazla, Figla, Nobox, Sohlh1, Ybx2, Cpeb1, Gdf9 ), fertilization (e.g., Zp1, Zp2, Zp3 ), and preimplantation embryonic development (e.g., Npm2, Zar1, Nalp5, Dppa3 ). Continued identification of novel oocyte-specific genes and the annotation of their functions will provide additional insight into the genetic pathways regulating ovarian development. The knowledge gained from mouse models will no doubt benefit the understanding of human biology and treatment of reproductive failure.
KEYWORDS
Oocyte-specific genes - folliculogenesis - fertilization - preimplantation embryonic development
REFERENCES
1
Koubova J, Menke D B, Zhou Q et al..
Retinoic acid regulates sex-specific timing of meiotic initiation in mice.
Proc Natl Acad Sci USA.
2006;
103
2474-2479
2
Bowles J, Knight D, Smith C et al..
Retinoid signaling determines germ cell fate in mice.
Science.
2006;
312
596-600
3
McLaren A, Southee D.
Entry of mouse embryonic germ cells into meiosis.
Dev Biol.
1997;
187
107-113
4
Hunt P A, Hassold T J.
Sex matters in meiosis.
Science.
2002;
296
2181-2183
5
Morelli M A, Cohen P E.
Not all germ cells are created equal: aspects of sexual dimorphism in mammalian meiosis.
Reproduction.
2005;
130
761-781
6
Brambell F WR.
The development and morphology of the gonads of the mouse. Part III. The growth of the follicles.
Proc R Soc Lond (Biol).
1928;
103
258-272
7
Pepling M E, Spradling A C.
Mouse ovarian germ cell cysts undergo programmed breakdown to form primordial follicles.
Dev Biol.
2001;
234
339-351
8
Hirshfield A N.
Development of follicles in the mammalian ovary.
Int Rev Cytol.
1991;
124
43-101
9 Zuckerman S, Baker T G. The development of the ovary and the process of oogenesis . In; Zuckerman S, Weir BJ The Ovary. New York; Academic Press 1977: 41-63
10
Zamboni L, Upadhyay S.
Germ cell differentiation in mouse adrenal glands.
J Exp Zool.
1983;
228
173-193
11
Soyal S M, Amleh A, Dean J.
FIGα, a germ-cell specific transcription factor required for ovarian follicle formation.
Development.
2000;
127
4645-4654
12
Ruggiu M, Speed R, Taggart M et al..
The mouse Dazla gene encodes a cytoplasmic protein essential for gametogenesis.
Nature.
1997;
389
73-77
13
Pangas S A, Choi Y, Ballow D J et al..
Oogenesis requires germ cell-specific transcriptional regulators Sohlh1 and Lhx8.
Proc Natl Acad Sci USA.
2006;
103
8090-8095
14
Rajkovic A, Pangas S A, Ballow D et al..
NOBOX deficiency disrupts early folliculogenesis and oocyte-specific gene expression.
Science.
2004;
305
1157-1159
15
Yang J, Medvedev S, Yu J et al..
Absence of the DNA-/RNA-binding protein MSY2 results in male and female infertility.
Proc Natl Acad Sci USA.
2005;
102
5755-5760
16
Tay J, Richter J D.
Germ cell differentiation and synaptonemal complex formation are disrupted in CPEB knockout mice.
Dev Cell.
2001;
1
201-213
17
Dong J, Albertini D F, Nishimori K et al..
Growth differentiation factor-9 is required during early ovarian folliculogenesis.
Nature.
1996;
383
531-535
18
Liang L, Soyal S M, Dean J.
FIGα, a germ cell specific transcription factor involved in the coordinate expression of the zona pellucida genes.
Development.
1997;
124
4939-4949
19
Millar S E, Lader E S, Dean J.
ZAP-1 DNA binding activity is first detected at the onset of zona pellucida gene expression in embryonic mouse oocytes.
Dev Biol.
1993;
158
410-413
20
Ballow D, Meistrich M L, Matzuk M et al..
Sohlh1 is essential for spermatogonial differentiation.
Dev Biol.
2006;
294
161-167
21
Ballow D J, Xin Y, Choi Y et al..
Sohlh2 is a germ cell-specific bHLH transcription factor.
Gene Expr Patterns.
2006;
6
1014-1018
22
Zhao Y, Marin O, Hermesz E et al..
The LIM-homeobox gene Lhx8 is required for the development of many cholinergic neurons in the mouse forebrain.
Proc Natl Acad Sci USA.
2003;
100
9005-9010
23
Mori T, Yuxing Z, Takaki H et al..
The LIM homeobox gene, L3/Lhx8, is necessary for proper development of basal forebrain cholinergic neurons.
Eur J Neurosci.
2004;
19
3129-3141
24
Reijo R, Lee T Y, Salo P et al..
Diverse spermatogenic defects in humans caused by Y chromosome deletions encompassing a novel RNA-binding protein gene.
Nat Genet.
1995;
10
383-393
25
Cooke H J, Lee M, Kerr S et al..
A murine homologue of the human DAZ gene is autosomal and expressed only in male and female gonads.
Hum Mol Genet.
1996;
5
513-516
26
Lin Y, Page D C.
Dazl deficiency leads to embryonic arrest of germ cell development in XY C57BL/6 mice.
Dev Biol.
2005;
288
309-316
27
Collier B, Gorgoni B, Loveridge C et al..
The DAZL family proteins are PABP-binding proteins that regulate translation in germ cells.
EMBO J.
2005;
24
2656-2666
28
Padmanabhan K, Richter J D.
Regulated Pumilio-2 binding controls RINGO/Spy mRNA translation and CPEB activation.
Genes Dev.
2006;
20
199-209
29
Yu J, Hecht N B, Schultz R M.
Expression of MSY2 in mouse oocytes and preimplantation embryos.
Biol Reprod.
2001;
65
1260-1270
30
Racki W J, Richter J D.
CPEB controls oocyte growth and follicle development in the mouse.
Development.
2006;
133
4527-4537
31
Vasudevan S, Seli E, Steitz J A.
Metazoan oocyte and early embryo development program: a progression through translation regulatory cascades.
Genes Dev.
2006;
20
138-146
32
Matzuk M M, Burns K H, Viveiros M M et al..
Intercellular communication in the mammalian ovary: oocytes carry the conversation.
Science.
2002;
296
2178-2180
33
Nilsson E, Parrott J A, Skinner M K.
Basic fibroblast growth factor induces primordial follicle development and initiates folliculogenesis.
Mol Cell Endocrinol.
2001;
175
123-130
34
Nilsson E E, Skinner M K.
Kit ligand and basic fibroblast growth factor interactions in the induction of ovarian primordial to primary follicle transition.
Mol Cell Endocrinol.
2004;
214
19-25
35
Thomas F H, Vanderhyden B C.
Oocyte-granulosa cell interactions during mouse follicular development: regulation of kit ligand expression and its role in oocyte growth.
Reprod Biol Endocrinol.
2006;
4
4-9
36
Yan C, Wang P, DeMayo J et al..
Synergistic roles of bone morphogenetic protein 15 and growth differentiation factor 9 in ovarian function.
Mol Endocrinol.
2001;
15
854-866
37
Elvin J A, Yan C, Wang P et al..
Molecular characterization of the follicle defects in the growth differentiation factor 9-deficient ovary.
Mol Endocrinol.
1999;
13
1018-1034
38
Dube J L, Wang P, Elvin J et al..
The bone morphogenetic protein 15 gene is X-linked and expressed in oocytes.
Mol Endocrinol.
1998;
12
1809-1817
39
Laitinen M, Vuojolainen K, Jaatinen R et al..
A novel growth differentiation factor-9 (GDF-9) related factor is co- expressed with GDF-9 in mouse oocytes during folliculogenesis.
Mech Dev.
1998;
78
135-140
40
Yoshino O, McMahon H E, Sharma S et al..
A unique preovulatory expression pattern plays a key role in the physiological functions of BMP-15 in the mouse.
Proc Natl Acad Sci USA.
2006;
103
10678-10683
41
Familiari G, Relucenti M, Heyn R et al..
Three-dimensional structure of the zona pellucida at ovulation.
Microsc Res Tech.
2006;
69
415-426
42
Bleil J D, Wassarman P M.
Synthesis of zona pellucida proteins by denuded and follicle-enclosed mouse oocytes during culture in vitro.
Proc Natl Acad Sci USA.
1980;
77
1029-1033
43
Bleil J D, Wassarman P M.
Structure and function of the zona pellucida: Identification and characterization of the proteins of the mouse oocyte's zona pellucida.
Dev Biol.
1980;
76
185-202
44
Phillips D M, Shalgi R.
Surface architecture of the mouse and hamster zona pellucida and oocyte.
J Ultrastruct Res.
1980;
72
1-12
45
Storey B T, Lee M A, Muller C et al..
Binding of mouse spermatozoa to the zonae pellucidae of mouse eggs in cumulus: evidence that the acrosomes remain substantially intact.
Biol Reprod.
1984;
31
1119-1128
46
Cherr G N, Lambert H, Meizel S et al..
In vitro studies of the golden hamster sperm acrosome reaction: completion on the zona pellucida and induction by homologous soluble zonae pellucidae.
Dev Biol.
1986;
114
119-131
47
Ward C R, Storey B T.
Determination of the time course of capacitation in mouse spermatozoa using a chlortetracycline fluorescence assay.
Dev Biol.
1984;
104
287-296
48
Jungnickel M K, Marrero H, Birnbaumer L et al..
Trp2 regulates entry of Ca2 + into mouse sperm triggered by egg ZP3.
Nat Cell Biol.
2001;
3
499-502
49
Herrick S B, Schweissinger D L, Kim S W et al..
The acrosomal vesicle of mouse sperm is a calcium store.
J Cell Physiol.
2005;
202
663-671
50
Baibakov B, Gauthier L, Talbot P et al..
Sperm binding to the zona pellucida is not sufficient to induce acrosome exocytosis.
Development.
2007;
134
433-443
51
Bork P, Sander C.
A large domain common to sperm receptors (Zp2 and Zp3) and TGF- beta type III receptor.
FEBS Lett.
1992;
300
237-240
52
Jovine L, Qi H, Williams Z et al..
The ZP domain is a conserved module for polymerization of extracellular proteins.
Nat Cell Biol.
2002;
4
457-461
53
Boja E S, Hoodbhoy T, Fales H M et al..
Structural characterization of native mouse zona pellucida proteins using mass spectrometry.
J Biol Chem.
2003;
278
34189-34202
54
Rankin T, Talbot P, Lee E et al..
Abnormal zonae pellucidae in mice lacking ZP1 result in early embryonic loss.
Development.
1999;
126
3847-3855
55
Rankin T L, O'Brien M, Lee E et al..
Defective zonae pellucidae in Zp2 null mice disrupt folliculogenesis, fertility and development.
Development.
2001;
128
1119-1126
56
Rankin T, Familari M, Lee E et al..
Mice homozygous for an insertional mutation in the Zp3 gene lack a zona pellucida and are infertile.
Development.
1996;
122
2903-2910
57
Liu C, Litscher E S, Mortillo S et al..
Targeted disruption of the mZP3 gene results in production of eggs lacking a zona pellucida and infertility in female mice.
Proc Natl Acad Sci USA.
1996;
93
5431-5436
58
Rankin T L, Tong Z-B, Castle P E et al..
Human ZP3 restores fertility in Zp3 null mice without affecting order-specific sperm binding.
Development.
1998;
125
2415-2424
59
Rankin T L, Coleman J S, Epifano O et al..
Fertility and taxon-specific sperm binding persist after replacement of mouse ‘sperm receptors' with human homologues.
Dev Cell.
2003;
5
33-43
60
Florman H M, Wassarman P M.
O-linked oligosaccharides of mouse egg ZP3 account for its sperm receptor activity.
Cell.
1985;
41
313-324
61
Leyton L, Saling P.
Evidence that aggregation of mouse sperm receptors by ZP3 triggers the acrosome reaction.
J Cell Biol.
1989;
108
2163-2168
62
Miller D J, Macek M B, Shur B D.
Complementarity between sperm surface beta-1,4-galactosyltransferase and egg-coat ZP3 mediates sperm-egg binding.
Nature.
1992;
357
589-593
63
Miller D J, Gong X, Decker G et al..
Egg cortical granule N-acetylglucosaminidase is required for the mouse zona block to polyspermy.
J Cell Biol.
1993;
123
1431-1440
64
Thall A D, Maly P, Lowe J B.
Oocyte gal alpha 1,3gal epitopes implicated in sperm adhesion to the zona pellucida glycoprotein ZP3 are not required for fertilization in the mouse.
J Biol Chem.
1995;
270
21437-21440
65
Lu Q, Shur B D.
Sperm from β1,4-galactosyltransferase-null mice are refractory to ZP3-induced acrosome reactions and penetrate the zona pellucida poorly.
Development.
1997;
124
4121-4131
66
Liu C, Litscher S, Wassarman P M.
Transgenic mice with reduced numbers of functional sperm receptors on their eggs reproduce normally.
Mol Biol Cell.
1995;
6
577-585
67
Liu D Y, Baker H W, Pearse M J et al..
Normal sperm-zona pellucida interaction and fertilization in vitro in alpha-1,3-galactosyltransferase gene knockout mice.
Mol Hum Reprod.
1997;
3
1015-1016
68
Asano M, Furukawa K, Kido M et al..
Growth retardation and early death of beta-1,4-galactosyltransferase knockout mice with augmented proliferation and abnormal differentiation of epithelial cells.
EMBO J.
1997;
16
1850-1857
69
Bleil J D, Beall C F, Wassarman P M.
Mammalian sperm-egg interaction: fertilization of mouse eggs triggers modification of the major zona pellucida glycoprotein, ZP2.
Dev Biol.
1981;
86
189-197
70
Bauskin A R, Franken D R, Eberspaecher U et al..
Characterization of human zona pellucida glycoproteins.
Mol Hum Reprod.
1999;
5
534-540
71
Dean J.
Reassessing the molecular biology of sperm-egg recognition with mouse genetics.
Bioessays.
2004;
26
29-38
72
Hoodbhoy T, Dean J.
Insights into the molecular basis of sperm-egg recognition in mammals.
Reproduction.
2004;
127
417-422
73
Wassarman P M, Jovine L, Qi H et al..
Recent aspects of mammalian fertilization research.
Mol Cell Endocrinol.
2005;
234
95-103
74
Shur B D, Rodeheffer C, Ensslin M A et al..
Identification of novel gamete receptors that mediate sperm adhesion to the egg coat.
Mol Cell Endocrinol.
2006;
250
137-148
75
Nakanishi T, Ikawa M, Yamada S et al..
Real-time observation of acrosomal dispersal from mouse sperm using GFP as a marker protein.
FEBS Lett.
1999;
449
277-283
76
Christians E, Davis A A, Thomas S D et al..
Maternal effect of hsf1 on reproductive success.
Nature.
2000;
407
693-694
77
Wu X, Viveiros M M, Eppig J J et al..
Zygote arrest 1 (Zar1) is a novel maternal-effect gene critical for the oocyte-to-embryo transition.
Nat Genet.
2003;
33
187-191
78
Burns K H, Viveiros M M, Ren Y et al..
Roles of NPM2 in chromatin and nucleolar organization in oocytes and embryos.
Science.
2003;
300
633-636
79
Payer B, Saitou M, Barton S C et al..
Stella is a maternal effect gene required for normal early development in mice.
Curr Biol.
2003;
13
2110-2117
80
Bortvin A, Goodheart M, Liao M et al..
Dppa3/Pgc7/stella is a maternal factor and is not required for germ cell specification in mice.
BMC Dev Biol.
2004;
4
2
81
Oh B, Hwang S Y, Solter D et al..
Spindlin, a major maternal transcript expressed in the mouse during the transition from oocyte to embryo.
Development.
1997;
124
493-503
82
Bultman S J, Gebuhr T C, Pan H et al..
Maternal BRG1 regulates zygotic genome activation in the mouse.
Genes Dev.
2006;
20
1744-1754
83
Ma J, Zeng F, Schultz R M et al..
Basonuclin: a novel mammalian maternal-effect gene.
Development.
2006;
133
2053-2062
84
Tong Z B, Gold L, Pfeifer K E et al..
Mater, a maternal effect gene required for early embryonic development in mice.
Nat Genet.
2000;
26
267-268
85
Howell C Y, Bestor T H, Ding F et al..
Genomic imprinting disrupted by a maternal effect mutation in the Dnmt1 gene.
Cell.
2001;
104
829-838
86
Wu X, Wang P, Brown C A et al..
Zygote arrest 1 (Zar1) is an evolutionarily conserved gene expressed in vertebrate ovaries.
Biol Reprod.
2003;
69
861-867
87
Philpott A, Leno G H, Laskey R A.
Sperm decondensation in Xenopus egg cytoplasm is mediated by nucleoplasmin.
Cell.
1991;
65
569-578
88
Philpott A, Leno G H.
Nucleoplasmin remodels sperm chromatin in Xenopus egg extracts.
Cell.
1992;
69
759-767
89
Tschopp J, Martinon F, Burns K.
NALPs: a novel protein family involved in inflammation.
Nat Rev Mol Cell Biol.
2003;
4
95-104
90
Saitou M, Barton S C, Surani M A.
A molecular programme for the specification of germ cell fate in mice.
Nature.
2002;
418
293-300
Dr. Ping Zheng
Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Disease
National Institutes of Health, 50 South Drive, Bethesda, MD 20892
Email: zhengp@niddk.nih.gov