primary ovarian insufficiency/phosphatase

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A study of premature ovarian failure in Turkish women.

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The parameters that could be responsible for or could be the end results of the premature ovarian failure were evaluated in 100 patients and compared with the same parameters of a control group consisting of 30 ovulatory healthy women with regular menstrual cycles. The incidence of premature ovarian

Mutational analysis of the PTEN gene in women with premature ovarian failure.

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Recent studies in mammals have suggested that the phosphatase and tensin homolog deleted on chromosome 10 (PTEN) - phosphatidylinositol-3, 4, 5-trisphosphate pathway in oocytes might be related to the pathogenesis of premature ovarian failure (POF). The aim of this study was to investigate whether

No association between polymorphisms in PTEN and primary ovarian insufficiency in a Han Chinese population.

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BACKGROUND The aim of our study was to investigate the possible relationship between polymorphisms in PTEN (the phosphatase and tensin homolog located on chromosome ten in humans) and POI (primary ovarian insufficiency) in Chinese women. METHODS Seven tag SNPs (single nucleotide polymorphisms) -

Implications of premature ovarian failure on bone turnover markers and bone mineral density.

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BACKGROUND Premature ovarian failure (POF) is the cessation of ovarian function before the age of 40. The loss of ovarian function, whether premature or not, has an overwhelming impact on female skeletal health, leading to an increased risk of developing osteoporosis because of the lengthened time

Physiological versus standard sex steroid replacement in young women with premature ovarian failure: effects on bone mass acquisition and turnover.

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BACKGROUND The aim of this exploratory study was to establish whether we could improve skeletal health with a physiological regimen of SSR in young women with premature ovarian failure (POF). METHODS In an open-label randomized controlled crossover trial, 34 women with POF were randomized to 4-week

Inhibition of MAPK by prolactin signaling through the short form of its receptor in the ovary and decidua: involvement of a novel phosphatase.

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Prolactin (PRL) is essential for normal reproduction and signals through two types of receptors, the short (PRL-RS) and long (PRL-RL) form. We have previously shown that transgenic mice expressing only PRL-RS (PRLR(-/-)RS) display abnormal follicular development and premature ovarian failure. Here,

Activation of dormant follicles: a new treatment for premature ovarian failure?

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Premature ovarian failure (POF) is diagnosed by amenorrhea before 40 years of age. Owing to exhaustion of follicles in POF ovaries, egg donation is the only option. Although menstrual cycles cease in POF patients, some of them still contain residual dormant follicles in ovaries. Recently, we

Protein Phosphatase 6 Protects Prophase I-Arrested Oocytes by Safeguarding Genomic Integrity.

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Mammalian oocytes are arrested at prophase of the first meiotic division in the primordial follicle pool for months, even years, after birth depending on species, and only a limited number of oocytes resume meiosis, complete maturation, and ovulate with each reproductive cycle. We recently reported

Successful fertility preservation following ovarian tissue vitrification in patients with primary ovarian insufficiency.

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OBJECTIVE Is ovarian tissue cryopreservation using vitrification followed by in vitro activation (IVA) of dormant follicles a potential approach for infertility treatment of patients with primary ovarian insufficiency (POI)? CONCLUSIONS Our vitrification approach followed by IVA treatment is a

Primordial follicle activation as new treatment for primary ovarian insufficiency.

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Primordial follicle activation is a process in which individual primordial follicles leave their dormant state and enter a growth phase. While existing hormone stimulation strategies targeted the growing follicles, the remaining dormant primordial follicles were ruled out from clinical use.

Goserelin, as an ovarian protector during (neo)adjuvant breast cancer chemotherapy, prevents long term altered bone turnover.

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BACKGROUND The Ovarian Protection Trial In Premenopausal Breast Cancer Patients "OPTION" trial (NCT00427245) was a prospective, multicenter, randomised, open label study evaluating the frequency of primary ovarian insufficiency (POI) at 12 months in women randomised to 6-8 cycles of (neo)adjuvant

Answer to Controversy: miR-10a Replacement Approaches Do Not Offer Protection against Chemotherapy-Induced Gonadotoxicity in Mouse Model.

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It is well known that chemotherapeutic agents may lead to premature ovarian failure and infertility. Therefore, fertility preservation is highly recommended for female cancer survivors. Despite the currently available techniques, new, non-invasive methods need to be developed to protect the ovarian

Bisphenol A Initiates Excessive Premature Activation of Primordial Follicles in Mouse Ovaries via the PTEN Signaling Pathway.

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The essence of primary ovarian insufficiency (POI) is the premature exhaustion of primordial follicles in the follicle pool, which is caused by the excessive premature activation of primordial follicles after birth. Bisphenol A (BPA) exposure promotes the transition of primordial follicles to

[The prevention of bone mineral loss with hormonal replacement therapy in premenopausal women on dialysis with estrogen deficiency].

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In 25-30% of premenopausal dialysis women low serum estrogen concentrations are observed. This "premature menopause" can significantly contribute to accelerated bone loss. The aim of the study was to evaluate the effect of estrogen-gestagen replacement therapy on bone mineral density (BMD) in

Ovarian surface epithelium in patients with severe ovarian infertility: a potential source of cells expressing markers of pluripotent/multipotent stem cells.

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The aim of this study was to confirm the presence of stem cells in the ovarian surface epithelium of patients with premature ovarian failure and no mature follicles and oocytes. In these patients, small round cells of unknown origin expressing SOX-2 marker of pluripotency were observed among the

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