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Infertility and Recurrent Pregnancy Loss v0.102 MEI1 Zornitza Stark Marked gene: MEI1 as ready
Infertility and Recurrent Pregnancy Loss v0.102 MEI1 Zornitza Stark Gene: mei1 has been classified as Green List (High Evidence).
Infertility and Recurrent Pregnancy Loss v0.102 MEI1 Zornitza Stark Publications for gene: MEI1 were set to 30388401
Infertility and Recurrent Pregnancy Loss v0.101 MEI1 Zornitza Stark Classified gene: MEI1 as Green List (high evidence)
Infertility and Recurrent Pregnancy Loss v0.101 MEI1 Zornitza Stark Gene: mei1 has been classified as Green List (High Evidence).
Infertility and Recurrent Pregnancy Loss v0.77 MEI1 Jasmine Chew changed review comment from: Literature in OMIM- PubMed: 30388401- biallelic variants in two women with history of RPL and HM (probands 1333 and 880) and affected family members (females with similar phenotypes and also male with NOA)

New papers (biallelic variants for OZEMA):
i) PMID: 38416203- novel compound heterozygous frameshift variants (c.3002delC and c.2264_2268 + 11delGTGAGGTATGGACCAC) in a case of a female infertile patient suffering from embryonic arrest and recurrent implantation failure. Her arrested embryos from MEI1-affected oocytes exhibited abnormalities in copy number variation and DNA methylation following CMA, which contrasts with the proliferating embryos secondary to the loss of maternal chromosomes in hydatidiform moles.

ii)PMID: 34037756- five novel mutations in MEI1 in nine patients with similar infertile phenotypes of recurrent hydatidiform moles, embryonic arrest, recurrent implantation failure, and recurrent pregnancy loss from seven independent families. In vitro studies also demonstrated that protein-truncating and missense mutations reduced the protein level of MEI1, while the splicing mutations caused abnormal alternative splicing of MEI1.

New papers (biallelic variants for NOA):
i) PMID: 36759719- Biallelic deleterious variants in four Chinese patients with NOA. Testicular pathologic analysis and immunohistochemical staining revealed that spermatogenesis is arrested at spermatocyte stage, with defective programmed DNA double-strand breaks (DSBs) homoeostasis and meiotic chromosome synapsis in patients carrying the variants. In addition, our results showed that one missense variant (c.G186C) reduced the expression of MEI1 and one frameshift variant (c.251delT) led to truncated proteins of MEI1 in in vitro.
- others- PMID: 32741963, PMID: 36017582

Note: Moderate evidence for OZEMA and HM in FeRGI database
Sources: Literature; to: Literature in OMIM- PubMed: 30388401- biallelic variants in two women with history of RPL and HM (probands 1333 and 880) and affected family members (females with similar phenotypes and also male with NOA)

New papers (biallelic variants for OZEMA):
i) PMID: 38416203- novel compound heterozygous frameshift variants (c.3002delC and c.2264_2268 + 11delGTGAGGTATGGACCAC) in a case of a female infertile patient suffering from embryonic arrest and recurrent implantation failure. Her arrested embryos from MEI1-affected oocytes exhibited abnormalities in copy number variation and DNA methylation following CMA, which contrasts with the proliferating embryos secondary to the loss of maternal chromosomes in hydatidiform moles.

ii)PMID: 34037756- five novel mutations in MEI1 in nine patients with similar infertile phenotypes of recurrent hydatidiform moles, embryonic arrest, recurrent implantation failure, and recurrent pregnancy loss from seven independent families. In vitro studies also demonstrated that protein-truncating and missense mutations reduced the protein level of MEI1, while the splicing mutations caused abnormal alternative splicing of MEI1.

New papers (biallelic variants for NOA):
i) PMID: 36759719- Biallelic deleterious variants in four Chinese patients with NOA. Testicular pathologic analysis and immunohistochemical staining revealed that spermatogenesis is arrested at spermatocyte stage, with defective programmed DNA double-strand breaks (DSBs) homoeostasis and meiotic chromosome synapsis in patients carrying the variants. In addition, our results showed that one missense variant (c.G186C) reduced the expression of MEI1 and one frameshift variant (c.251delT) led to truncated proteins of MEI1 in in vitro.
- others: PMID: 32741963;36017582

Note: Moderate evidence for OZEMA and HM in FeRGI database
Sources: Literature
Infertility and Recurrent Pregnancy Loss v0.77 MEI1 Jasmine Chew edited their review of gene: MEI1: Changed publications: 30388401, 38416203, 34037756, 36759719, 32741963, 36017582
Infertility and Recurrent Pregnancy Loss v0.77 MEI1 Jasmine Chew gene: MEI1 was added
gene: MEI1 was added to Infertility and Pregnancy Loss. Sources: Literature
Mode of inheritance for gene: MEI1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MEI1 were set to 30388401
Phenotypes for gene: MEI1 were set to Recurrent hydatidiform mole 3, MIM# 618431; Non-obstructive azoospermia
Review for gene: MEI1 was set to GREEN
Added comment: Literature in OMIM- PubMed: 30388401- biallelic variants in two women with history of RPL and HM (probands 1333 and 880) and affected family members (females with similar phenotypes and also male with NOA)

New papers (biallelic variants for OZEMA):
i) PMID: 38416203- novel compound heterozygous frameshift variants (c.3002delC and c.2264_2268 + 11delGTGAGGTATGGACCAC) in a case of a female infertile patient suffering from embryonic arrest and recurrent implantation failure. Her arrested embryos from MEI1-affected oocytes exhibited abnormalities in copy number variation and DNA methylation following CMA, which contrasts with the proliferating embryos secondary to the loss of maternal chromosomes in hydatidiform moles.

ii)PMID: 34037756- five novel mutations in MEI1 in nine patients with similar infertile phenotypes of recurrent hydatidiform moles, embryonic arrest, recurrent implantation failure, and recurrent pregnancy loss from seven independent families. In vitro studies also demonstrated that protein-truncating and missense mutations reduced the protein level of MEI1, while the splicing mutations caused abnormal alternative splicing of MEI1.

New papers (biallelic variants for NOA):
i) PMID: 36759719- Biallelic deleterious variants in four Chinese patients with NOA. Testicular pathologic analysis and immunohistochemical staining revealed that spermatogenesis is arrested at spermatocyte stage, with defective programmed DNA double-strand breaks (DSBs) homoeostasis and meiotic chromosome synapsis in patients carrying the variants. In addition, our results showed that one missense variant (c.G186C) reduced the expression of MEI1 and one frameshift variant (c.251delT) led to truncated proteins of MEI1 in in vitro.
- others- PMID: 32741963, PMID: 36017582

Note: Moderate evidence for OZEMA and HM in FeRGI database
Sources: Literature