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Phenotypes Associated with This Genotype
Genotype
MGI:3798305
Allelic
Composition
Esr1tm1.1Mma/Esr1tm1.1Mma
Esr2tm1Mma/Esr2tm1Mma
Genetic
Background
involves: 129S2/SvPas * C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Esr1tm1.1Mma mutation (0 available); any Esr1 mutation (72 available)
Esr2tm1Mma mutation (0 available); any Esr2 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• mice exhibit large, hemorrhagic cysts originating from antral follicles

reproductive system
• in the seminiferous tubules
• unlike in wild-type mice, follicles exhibit a marked deficiency in granulosa cells
• the largest antral follicles exhibit very thin walls due to the absence of granulosa cells
• mice exhibit a reduction in the number of glandular interstitial cells compared to wild-type mice and these cells appear loosely arranged as a consequence of edema
• mice exhibit the presence of mast-like cells in the ovaries unlike wild-type mice
• ovaries contain fully differentiated Sertoli cells
• however, female mice do not exhibit an increase in anti-Mullerian hormone
• however, primordial, and primary follicles are normal
• Sertoli cells develop between ovarian follicles after the onset of puberty and appear to arise within the epithelium of atretic follicles
• mice exhibit an excess of follicles at advanced stages of atresia
• the largest antral follicles exhibit very thin walls due to the absence of granulosa cells
• unlike in wild-type mice, prepubertal antral follicles are surrounded by a single layer or loosely packed organization of granulosa cells and a single layer of theca cells, and contain a suspended oocyte completely detached from the follicular wall
• theca cell proliferation is decreased compared to in wild-type mice
• mice exhibit large, hemorrhagic cysts originating from antral follicles
• mice exhibit a straightening of the rete testis unlike wild-type mice
• mice exhibit a straightening of the seminiferous tubules unlike wild-type mice
• ovaries contain fully differentiated Sertoli cells
• Sertoli cells in the ovaries develop between ovarian follicles after the onset of puberty and appear to arise within the epithelium of atretic follicles
• despite normal genital tract anterior-posterior development, mice exhibit a 2-fold reduction in uterus diameter and wall thickness
• mice exhibit a reduction in cell number and size that affects all tissue types
• despite normal genital tract anterior-posterior development, mice exhibit a 2-fold reduction in vagina diameter and wall thickness
• mice exhibit hypoplastic vaginas with a reduction in both cell number and size that affects all tissue types

homeostasis/metabolism
• mice fail to superovulate when treated with gonadotropins and follicles fail to even reach the preovulatory stage unlike in similarly treated wild-type mice

endocrine/exocrine glands
• unlike in wild-type mice, follicles exhibit a marked deficiency in granulosa cells
• the largest antral follicles exhibit very thin walls due to the absence of granulosa cells
• mice exhibit a reduction in the number of glandular interstitial cells compared to wild-type mice and these cells appear loosely arranged as a consequence of edema
• mice exhibit the presence of mast-like cells in the ovaries unlike wild-type mice
• ovaries contain fully differentiated Sertoli cells
• however, female mice do not exhibit an increase in anti-Mullerian hormone
• however, primordial, and primary follicles are normal
• Sertoli cells develop between ovarian follicles after the onset of puberty and appear to arise within the epithelium of atretic follicles
• mice exhibit an excess of follicles at advanced stages of atresia
• the largest antral follicles exhibit very thin walls due to the absence of granulosa cells
• unlike in wild-type mice, prepubertal antral follicles are surrounded by a single layer or loosely packed organization of granulosa cells and a single layer of theca cells, and contain a suspended oocyte completely detached from the follicular wall
• theca cell proliferation is decreased compared to in wild-type mice
• mice exhibit large, hemorrhagic cysts originating from antral follicles
• mice exhibit a straightening of the rete testis unlike wild-type mice
• mice exhibit a straightening of the seminiferous tubules unlike wild-type mice
• ovaries contain fully differentiated Sertoli cells
• Sertoli cells in the ovaries develop between ovarian follicles after the onset of puberty and appear to arise within the epithelium of atretic follicles

cellular
• in the seminiferous tubules
• unlike in wild-type mice, follicles exhibit a marked deficiency in granulosa cells
• the largest antral follicles exhibit very thin walls due to the absence of granulosa cells


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
01/28/2026
MGI 6.24
The Jackson Laboratory