Search

Objective: To determine whether endometrial thickening is an important factor for pregnancy outcomes in platelet-rich plasma (PRP) treatment for patients with thin endometrium. Methods: Data from the registry database of the Japan Gynecologic PRP Study Group from April 2019 to October 2021 were analyzed retrospectively. A total of 208 patients who underwent single blastocyst transfer (SBT) after PRP due to thin endometrium (¡8 mm) in their previous cycle were included in the study. Their pregnancy outcomes were compared with their own historical data before PRP infusion. The same patient group was then divided into 136 patients whose endometrium thickened after PRP and 72 patients whose endometrium did not, and the pregnancy outcomes of the two groups were compared. Furthermore, to eliminate embryonic confounding, 28 patients who had single euploid blastocyst transfer (SEBT) with preimplantation genetic testing for aneuploidy (PGT-A) were selected from the same patient group and divided into two groups of 22 patients whose endometrium thickened and 6 patients whose endometrium did not, and the pregnancy outcomes were compared in the same method. Results: After PRP administration, the clinical pregnancy rate, live birth rate, and miscarriage rate were all significantly improved compared with the historical controls (34.1 vs 20.0, [Formula: see text]; 22.6 vs 3.9, [Formula: see text]; 33.8 vs 73.4, [Formula: see text]). There were no statistically significant differences in the respective rates between the “thickened endometrium” group and the “unthickened endometrium” group in SBT group (36.0 vs [Formula: see text], [Formula: see text]; 25.7 vs [Formula: see text], [Formula: see text]; 28.5 vs [Formula: see text], [Formula: see text], respectively). Likewise, in the SEBT with PGT-A group, there were no statistically significant differences in results between the two groups (36.4 vs [Formula: see text], [Formula: see text]; 36.4 vs [Formula: see text], [Formula: see text]; 0 vs [Formula: see text], respectively). Conclusions: PRP administration to patients with thin endometrium improves pregnancy outcomes even when endometrial thickening is not achieved.

Purpose To evaluate the efficacy and safety of self‐injections of the prefilled recombinant human chorionic gonadotropin (r‐hCG) in a syringe in assisted reproductive technology (ART) treatment for the maturation trigger (MT), as compared to self‐injections of conventional hCG and intranasal administration of gonadotropin‐releasing hormone agonist (GnRH‐a). Methods Between January and April, 2017, 396 patients who underwent oocyte retrieval were recruited. Of these, 396 patients were classified into three groups, according to the types of MT: (1) the urinary human chorionic gonadotropin (u‐hCG) group that consisted of patients who had a self‐injection of u‐hCG (n = 127); (2) the GnRH‐a group that received nasal administration of GnRH‐a (n = 159); and (3) the r‐hCG group that had a self‐injection of r‐hCG (n = 110). Several ART outcomes were evaluated. Results The mature oocyte retrieval rate was not different between the u‐hCG, r‐hCG, and GnRH‐a groups and the fertilization and cleavage rates were similar between the three groups. The clinical pregnancy rates did not significantly differ between the GnRH‐a group and the u‐hCG group; however, it was significantly lower in the GnRH‐a group, compared to the r‐hCG group. No difference was observed in the incidence of moderate or more severe ovarian hyperstimulation syndrome among the three groups. Conclusion The self‐injection of the prefilled r‐hCG is a favorable MT for ART patients.

Members of the 14-3-3 family are intracellular dimeric phosphoserine-binding proteins that can associate with and modulate the activities of many proteins. In our efforts to isolate the genes regulated by progesterone (P4) using suppressive subtractive hybridization, we previously found that14-3-3τis one of the genes upregulated by P4. In this study, we demonstrated by quantitative RT-PCR (qRT-PCR), western blot analyses, and immunohistochemistry that 14-3-3τ mRNA and protein levels were increased in the rat uterus after P4treatment. Furthermore, qRT-PCR indicated that P4increased14-3-3τmRNA levels in human endometrial epithelial cells and endometrial stromal cells (ESCs). Western blot and qRT-PCR analyses revealed thatin vitrodecidualization using cAMP and medroxyprogesterone 17-acetate increased levels of 14-3-3τ mRNA and protein in ESCs. We have shown by qRT-PCR and western blot analyses that P4increased the mRNA and protein levels of 14-3-3τ in Ishikawa cells that stably express P4receptor-B (PR-B). Immunocytochemistry revealed that 14-3-3τ colocalizes with PR and translocates from the cytoplasm to the nucleus in response to P4. Moreover, by luciferase reporter assay, we demonstrated that 14-3-3τ enhances the transcriptional activity of PR-B. Taken together, we propose that14-3-3τis a P4-responsive gene in uterine cells that modulates P4signaling.

Objective To investigate the hormonal regulation of SULT2B1b in human endometrium. Design In vitro study with human endometrial tissues and cultured human endometrial cells. Setting University hospital. Patient(s) Thirty-seven women undergoing hysterectomy for benign disease. Intervention(s) Human endometrial tissues were collected for in situ hybridization. Culture medium of human endometrial epithelial cells (EECs) was collected for determination of secretion of cholesterol sulfate (CS). Total RNAs were extracted from human endometrial tissues and cultured cells for real-time reverse transcriptase–polymerase chain reaction (RT-PCR). Main Outcome Measure(s) The expression of SULT2B1b mRNA in human endometrial tissues and cultured cells. Result(s) In situ hybridization studies and real-time RT-PCR showed that the amount of SULT2B1b mRNA in human endometrial tissues was significantly higher during the midluteal phase than during other phases of the menstrual cycle. The secretion of CS from EECs was confirmed using [ 35 S]-phosphoadenosine phosphosulfate. The expression of SULT2B1b mRNA was induced by cAMP or P in human endometrial stromal cells (ESCs), whereas it was induced by cAMP or relaxin in EECs. The induction of SULT2B1b mRNA by P or relaxin was abolished by the specific protein kinase A (PKA) inhibitor, Rp-adenosine 3',5' cyclic monophosphothioate (Rp-cAMPS). Conclusion(s) The expression of SULT2B1b mRNA in ESCs is induced by P and that in EECs is induced by relaxin via the cAMP pathway.

To investigate the effect of cadmium (Cd) contamination on endometrial function, human endometrial stromal cells were isolated and cultured with E(2) plus P in the presence of Cd, a major contaminant in cigarette smoke, and assayed for PRL concentrations and its messenger RNA expression. Cd significantly increased PRL concentrations in the culture media and significantly up-regulated PRL messenger RNA expression of the endometrial stromal cells, suggesting that Cd stimulates decidualization of the endometrium and may disrupt endometrial environment, causing early decidualization.

Periostin/OSF2 is a ligand for alphavbeta3 and alphavbeta5 integrins and activates the Akt/PKB pathway. Recent reports of periostin/OSF2 gene disrupted mice indicate that periostin/OSF-2 plays an important role in implantation. Quantitative RT-PCR revealed that the expression of periostin/OSF-2 mRNA in rat uteri was reduced to approximately 10% at 12 h after 17beta-estradiol (E2) injection, but was not changed after progesterone (P) injection. RT-PCR revealed the expression of periostin/OSF-2 in human endometrium, cultured human endometrial stromal cells (ESCs), and cultured human endometrial epithelial cells. In ESCs, the expression of periostin/OSF-2 mRNA was reduced to approximately 50% at 6 h after E2 treatment. The amount of periostin/OSF2 mRNA in human endometrium significantly increased during mid-proliferative and early secretory phases of menstrual cycle, and decreased during late-proliferative, mid-secretory and late secretory phases. The expression of periostin/OSF2 mRNA significantly decreased in ESCs decidualized by treatment with E2 and P for 7 and 11 days. By immunohistochemistry, the expression of periostin/OSF-2 was strongly detected in endometrial stromal cells during early proliferative, mid-proliferative and early secretory phases, and was strongly detected in endometrial epithelial cells during late secretory phase. This study demonstrated that the expression of periostin/OSF-2 is regulated by ovarian steroid hormones in rat uterus and human endometrium.

Singleton pregnancy after assisted reproductive technology (ART) has been associated with higher risks of adverse pregnancy outcome than naturally conceived singleton pregnancy. This study was to elucidate whether the ART procedure is responsible for abnormal pregnancy outcome comparing those after ART and non-ART in infertile patients.We compare the singleton pregnancy outcome of infertile patients in our university hospital between 2000 and 2008 following ART (351 pregnancies) and non-ART (213 pregnancies) procedures. Pregnancy outcome parameters were incidence of pregnancy induced hypertension, placenta previa, placental abruption, cesarean delivery, preterm birth, very preterm birth, stillbirth, low birth weight and very low birth weight.Most of the pregnancy outcome parameters were not significantly different between the ART group and the non-ART group. Only placenta previa was significantly higher in the ART group than in the non-ART group (odds ratio 4.0; 95 % CI 1.2-13.7).ART procedure may itself be a risk factor for the development of placenta previa. Some of the abnormal perinatal outcomes that had been previously attributed to ART, however, may be due to the baseline characteristics of infertile patients.

Cholesterol sulfate (CS) is a component of cell membranes that plays a role in stabilizing the cell membrane. We previously reported that CS increased in the endometrium during implantation, suggesting that CS plays an important role in reproduction. It has been reported that CS regulates progesterone and pregnenolone production in the placenta, adrenal glands and ovary. The regulatory mechanisms of steroid hormone production by CS, however, are still unknown. In the present study, we investigated the effect of CS on the expression of progesterone production-related genes in KGN cells, derived from human granulosa-like tumor. KGN cells were cultured with CS (10 muM) or cholesterol (10 muM) in the presence of 8-bromo-cAMP (1 mM). Progesterone levels in the culture media were measured by enzyme linked fluorescent assay at 24 h after treatment of CS and cAMP. Total RNAs were extracted for quantitative real time RT-PCR with specific primer of StAR protein, P450scc, HSD3B2, ferredoxin and ferredoxin reductase. Whole cell lysates were extracted for western blot analysis with antibody for StAR protein. Progesterone concentration in the culture medium increased to 38-fold by treatment of cAMP. CS significantly reduced progesterone concentration by 30% compared with those of cAMP treatment (p

The endometrium is one of the target tissues of the ovarian steroid hormones, estrogen and progesterone. In order to elucidate the mechanism of gene regulation in the endometrium, suppressive subtraction hybridization was performed to isolate the candidate genes controlled by progesterone in rat uterus. Alcohol dehydrogenase (ADH) class I gene was one of the candidate genes. Here we investigated the expression and regulation of ADH class I gene in rat uterus. The mRNA of ADH class I was detected in uterus by RT-PCR using specific primers. Using specific probe for ADH class I, in situ hybridization was performed to investigate localization in rat uterus. Positive signals were detected in the endometrial stromal cells of rat uterus by in situ hybridization and were not detected in endometrial epithelial cells and myometrium in rat uterus. Ovariectomized rats were treated with 17-beta estradiol and progesterone and the uteri of these rats were used for Northern blot analysis and assay of the ADH activity. Northern blot analysis revealed that the expression of ADH class I mRNA in rat uteri was up-regulated approximately two-fold after progesterone treatment, but not estrogen. Likewise, ADH activity was approximately two-fold higher in progesterone-treated rat uteri compared with controls. This study demonstrated that ADH class I gene is progesterone-responsive in the uterus. This implies that progesterone might be involved with retinoic acid synthesis in the uterus, since ADH is the key enzyme for retinoic acid synthesis.