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Reproductive Biology and Endocrinology: RB&E

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https://www.readbyqxmd.com/read/30223902/dehydroepiandrosterone-dhea-supplementation-improves-in-vitro-fertilization-outcomes-of-poor-ovarian-responders-especially-in-women-with-low-serum-concentration-of-dhea-s-a-retrospective-cohort-study
#1
Chyi-Uei Chern, Kuan-Hao Tsui, Salvatore Giovanni Vitale, San-Nung Chen, Peng-Hui Wang, Antonio Cianci, Hsiao-Wen Tsai, Zhi-Hong Wen, Li-Te Lin
BACKGROUND: Dehydroepiandrosterone (DHEA) is now widely used as an adjuvant for in vitro fertilization (IVF) cycles in poor ovarian responders (PORs). Several studies showed that DHEA supplementation could improve IVF outcomes of PORs. However, most of the PORs do not respond to DHEA clinically. Therefore, the aim of this study is to confirm the beneficial effects of DHEA on IVF outcomes of PORs and to investigate which subgroups of PORs can best benefit from DHEA supplementation. METHODS: This retrospective cohort study was performed between January 2015 and December 2017...
September 17, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30217209/mild-ovarian-stimulation-with-letrozole-plus-fixed-dose-human-menopausal-gonadotropin-prior-to-ivf-icsi-for-infertile-non-obese-women-with-polycystic-ovarian-syndrome-being-pre-treated-with-metformin-a-pilot-study
#2
Giuseppe D'Amato, Anna Maria Caringella, Antonio Stanziano, Clementina Cantatore, Simone Palini, Ettore Caroppo
BACKGROUND: Letrozole is widely employed as ovulation induction agent in women with PCOS, but its use in mild stimulation (MS) protocols for IVF is limited. Aim of the present study was to evaluate the feasibility of a MS protocol with letrozole plus hMG in non-obese PCOS women undergoing IVF after a metformin pre-treatment. METHODS: We retrospectively evaluated the data of 125 non-obese PCOS undergoing MS with letrozole plus hMG, 150 IU as starting dose, (group 1, N = 80) compared to those undergoing a conventional IVF stimulation protocols (CS) (group 2, N = 45) prior to IVF...
September 14, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30213271/escherichia-coli-recombinant-sperm-immobilizing-factor-recx-as-a-potential-vaginal-contraceptive
#3
Monika Answal, Vijay Prabha
BACKGROUND: To control the overpopulation and unintended pregnancies, vaginal contraceptives have gained recent surge of interest because of its topical application with possible avoidance of systemic effects. However non-specific cytotoxicity associated with detergent-based synthetic vaginal contraceptive agents limits their use and generates considerable interest in the development of vaginal contraceptives of biological origin for controlling reproduction and ultimately growing population...
September 13, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30205828/reactive-oxygen-species-and-male-reproductive-hormones
#4
REVIEW
Mahsa Darbandi, Sara Darbandi, Ashok Agarwal, Pallav Sengupta, Damayanthi Durairajanayagam, Ralf Henkel, Mohammad Reza Sadeghi
Reports of the increasing incidence of male infertility paired with decreasing semen quality have triggered studies on the effects of lifestyle and environmental factors on the male reproductive potential. There are numerous exogenous and endogenous factors that are able to induce excessive production of reactive oxygen species (ROS) beyond that of cellular antioxidant capacity, thus causing oxidative stress. In turn, oxidative stress negatively affects male reproductive functions and may induce infertility either directly or indirectly by affecting the hypothalamus-pituitary-gonadal (HPG) axis and/or disrupting its crosstalk with other hormonal axes...
September 11, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30193590/pharmacological-sympathetic-denervation-prevents-the-development-of-polycystic-ovarian-syndrome-in-rats-injected-with-estradiol-valerate
#5
Julieta A Espinoza, Wendy Alvarado, Berenice Venegas, Roberto Domínguez, Leticia Morales-Ledesma
BACKGROUND: The injection of estradiol valerate in female rats induces polycystic ovary syndrome, which is characterized by polycystic ovaries, anovulation, and hyperandrogenism. These characteristics have been associated with an increase in the ovarian concentration of norepinephrine, which occurs before establishing the polycystic ovary syndrome. The bilateral section of the superior ovarian nerve restores ovarian functions in animals with polycystic ovary syndrome. The superior ovarian nerve provides norepinephrine and vasoactive intestinal peptide to the ovary...
September 7, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30176889/dysregulated-erythropoietin-producing-hepatocellular-receptor-a2-epha2-is-involved-in-tubal-pregnancy-via-regulating-cell-adhesion-of-the-fallopian-tube-epithelial-cells
#6
Huan Jiang, Xiao-Yi Yang, Wei-Jie Zhu
BACKGROUND: Tyrosine kinase receptor erythropoietin-producing hepatocellular receptor A2 (EphA2) is abundant in the endometrium and plays a role in the establishment of eutopic implantation. A similar molecular mechanism may exist between uterine implantation and tubal implantation, therefore EphA2 involvement in tubal pregnancy is suspected. Due to the limited availability of human Fallopian tube specimens, EphA2 expression in human Fallopian tube epithelium remains largely unknown. METHODS: A total of 31 women with tubal pregnancy and 41 non-pregnant women with benign uterine diseases were enrolled in this study...
September 3, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30176887/alleviation-of-endoplasmic-reticulum-stress-protects-against-cisplatin-induced-ovarian-damage
#7
Yuping Wu, Congshun Ma, Huihui Zhao, Yuxia Zhou, Zhenguo Chen, Liping Wang
BACKGROUND: Cisplatin (CDDP), a widely used chemotherapeutic agent, can induce excessive granulosa cell apoptosis, follicle loss and even premature ovarian insufficiency (POI). However, the mechanism remains elusive, although some studies have indicated the involvement of endoplasmic reticulum stress (ERS). The aim of our study was to investigate the possible mechanism ERS in CDDP-induced granulosa cell apoptosis and follicle loss. METHODS: A POI mouse model was generated by CDDP...
September 3, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30170607/the-relationship-between-gonadotropin-releasing-hormone-and-ovulation-inducing-factor-nerve-growth-factor-receptors-in-the-hypothalamus-of-the-llama
#8
Rodrigo A Carrasco, Jaswant Singh, Gregg P Adams
BACKGROUND: A molecule identical to nerve growth factor, with ovulation-inducing properties has been discovered in the seminal plasma of South American camelids (ovulation-inducing factor/nerve growth factor; OIF/NGF). We hypothesize that the ovulatory effect of OIF/NGF is initiated at the level of the hypothalamus, presumably by GnRH neurons. The objective of the present study was to determine the structural relationship between GnRH neurons and neurons expressing high- and low-affinity receptors for NGF (i...
August 31, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30157874/associations-between-the-maternal-circulating-lipid-profile-in-pregnancy-and-fetal-imprinted-gene-alleles-a-cohort-study
#9
Clive J Petry, Albert Koulman, Liangjian Lu, Benjamin Jenkins, Samuel Furse, Philippa Prentice, Lee Matthews, Ieuan A Hughes, Carlo L Acerini, Ken K Ong, David B Dunger
BACKGROUND: Imprinted genes, which are expressed in a parent of origin-specific manner, are thought to mediate the genetic priorities of each parent in pregnancy. Recently we reported that some fetal imprinted gene variants are associated with maternal glucose concentrations and blood pressures in pregnancy. We suggest that the conflict between the effects of paternal and maternal transmitted genes starts at conception and may already be evident in measures of maternal metabolism in early pregnancy, before gestational diabetes is manifest...
August 29, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30143014/human-sperm-acrosome-function-assays-are-predictive-of-fertilization-rate-in-vitro-a-retrospective-cohort-study-and-meta-analysis
#10
REVIEW
Fang Xu, Ganggang Guo, Wenbing Zhu, Liqing Fan
OBJECTIVE: To determine whether acrosome function scoring-including acrosomal enzyme (AE) levels and acrosome reaction (AR) results-can predict fertilization rate in vitro. METHODS: We examined the predictive value of acrosomal enzymes (AE) determined by spectrophotometry/N-α-benzoyl-DL-arginine-p-nitroanilide for fertilization rate (FR) in vitro in a retrospective cohort study of 737 infertile couples undergoing IVF therapy. Additionally, a meta-analysis was done for prospective cohort or case-control studies; the following summary measures were reported to expand upon the findings: pooled spearman correlation coefficient (Rs), standardized mean difference (SMD), sensitivity (SEN), specificity (SPE), positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic score (DS), diagnostic odds ratio (DOR), and area under the summary receiver operating characteristic curve (AUC)...
August 24, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30126412/a-novel-and-compact-review-on-the-role-of-oxidative-stress-in-female-reproduction
#11
REVIEW
Jiayin Lu, Zixu Wang, Jing Cao, Yaoxing Chen, Yulan Dong
In recent years, the study of oxidative stress (OS) has become increasingly popular. In particular, the role of OS on female fertility is very important and has been focused on closely. The occurrence of OS is due to the excessive production of reactive oxygen species (ROS). ROS are a double-edged sword; they not only play an important role as secondary messengers in many intracellular signaling cascades, but they also exert indispensable effects on pathological processes involving the female genital tract...
August 20, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30111318/peroxiredoxin-i-maintains-luteal-function-by-regulating-unfolded-protein-response
#12
Hyo-Jin Park, Dong Gil Lee, Jung Bae Seong, Hyun-Shik Lee, Oh-Shin Kwon, Beom Sik Kang, Jeen-Woo Park, Sang-Rae Lee, Dong-Seok Lee
BACKGROUND: Mounting evidence shows that ROS regulation by various antioxidants is essential for the expression of enzymes involved in steroidogenesis and maintenance of progesterone production by the corpus luteum (CL). However, the underlying mechanisms of peroxiredoxin 1 (PRDX1), an antioxidant enzyme, in luteal function for progesterone production in mice have not been reported. The aim of this study was to evaluate the functional link between PRDX1 and progesterone production in the CL of Prdx1 knockout (K/O) mice in the functional stage of CL...
August 15, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30103742/altered-mirna-profile-in-testis-of-post-cryptorchidopexy-patients-with-non-obstructive-azoospermia
#13
Dongdong Tang, Zhenyu Huang, Xiaojin He, Huan Wu, Dangwei Peng, Li Zhang, Xiansheng Zhang
BACKGROUND: Cryptorchidism is one of the most common causes of non-obstructive azoospermia (NOA) leading to male infertility. Despite various medical approaches been utilised, many patients still suffer from infertility. MicroRNAs (miRNAs) play vital roles in the progress of spermatogenesis; however, little is known about the miRNA expression profile in the testes. Therefore, the miRNA profile was assessed in the testis of post-cryptorchidopexy patients. METHODS: Three post-cryptorchidopexy testicular tissue samples from patients aged 23, 26 and 28 years old and three testis tissues from patients with obstructive azoospermia (controls) aged 24, 25 and 36 years old were used in this study...
August 13, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30097048/structure-of-preantral-follicles-oxidative-status-and-developmental-competence-of-in-vitro-matured-oocytes-after-ovary-storage-at-4-%C3%A2-c-in-the-domestic-cat-model
#14
Anna Rita Piras, Giovanni Pietro Burrai, Federica Ariu, Laura Falchi, Maria Teresa Zedda, Salvatore Pau, Sergio Domenico Gadau, Elisabetta Antuofermo, Daniela Bebbere, Sergio Ledda, Luisa Bogliolo
BACKGROUND: Storage conditions during transportation of explanted ovaries are a critical step in setting up fertility preservation protocols in both animal and human fields. Here, we evaluated the effects of ovary storage at 4 °C on the preservation of preantral follicles and oocytes retrieved from antral follicles using the domestic cat as model. METHODS: Ovaries were harvested from fifty-five healthy domestic queens during ovariectomy and stored at 4 °C for 0 (control), 24, 48, 72 and 96 h...
August 10, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30097043/using-appropriate-pre-pregnancy-body-mass-index-cut-points-for-obesity-in-the-chinese-population-a-retrospective-cohort-study
#15
Yanxin Wu, Wai-Kit Ming, Dongyu Wang, Haitian Chen, Zhuyu Li, Zilian Wang
BACKGROUND: Appropriate classification of obesity is vital for risk assessment and complication prevention during pregnancy. We aimed to explore which pre-pregnancy BMI cut-offs of obesity, either BMI ≥ 25 kg/m2 as recommended by the WHO for Asians or BMI ≥ 28 kg/m2 as suggested by the Working Group on Obesity in China (WGOC), best predicts the risk of adverse maternal and perinatal outcomes. METHODS: We retrospectively reviewed 11,494 medical records for live singleton deliveries in a tertiary center in Guangzhou, China, between January 2013 and December 2016...
August 10, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30092787/morning-blood-pressure-surge-and-its-relation-to-insulin-resistance-in-patients-of-reproductive-age-with-polycystic-ovary-syndrome
#16
Hasan Kadi, Eyup Avci, Akin Usta, Abdullah Orhan Demirtaş
BACKGROUND: Our aim in this study was to investigate morning blood pressure surge (MBPS) in patients of reproductive age with polycystic ovary syndrome (PCOS) and its relation to insulin resistance (IR). METHODS: Fifty-three patients with PCOS without additional illness were included in the study. Forty-two age-matched subjects without PCOS were selected as the control group. All study subjects underwent 24-h blood pressure monitoring. Patients with additional illnesses, drug users, smokers, and alcohol and drug abusers were excluded...
August 9, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30086781/influencing-factors-of-pregnancy-loss-and-survival-probability-of-clinical-pregnancies-conceived-through-assisted-reproductive-technology
#17
Lingmin Hu, Jiangbo Du, Hong Lv, Jing Zhao, Mengxi Chen, Yifeng Wang, Fang Wu, Feng Liu, Xiaojiao Chen, Junqiang Zhang, Hongxia Ma, Guangfu Jin, Hongbing Shen, Li Chen, Xiufeng Ling, Zhibin Hu
BACKGROUND: Pregnancies following assisted reproductive technology (ART) may have elevated potential risk of pregnancy loss (PL) when compared to natural conception. However, rare studies comprehensively analyzed the IVF/ICSI cycle-dependent factors for loss of clinical pregnancy. Therefore, we aimed to determine the ART subgroup-specific risks of PL throughout pregnancy and explore different risk factors for early miscarriage and late miscarriage among pregnancies conceived through ART...
August 7, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30075721/construction-and-analysis-of-a-lncrna-pwrn2-mediated-cerna-network-reveal-its-potential-roles-in-oocyte-nuclear-maturation-of-patients-with-pcos
#18
Xin Huang, Jiaping Pan, Bi Wu, Xiaoming Teng
BACKGROUND: Polycystic ovary syndrome (PCOS) is a common endocrine and metabolic disorder in women. An lncRNA, namely, Prader-Willi region nonprotein coding RNA 2 (PWRN2), was up-regulated in the cumulus cells of patients with PCOS. However, the molecular mechanism of PWRN2 in PCOS remains largely unknown. METHODS: In this study, the expression levels of PWRN2 were tested in cumulus cells through qRT-PCR analysis to confirm its potential roles in oocyte nuclear maturation of PCOS...
August 3, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30071873/three-dimensional-evaluation-of-murine-ovarian-follicles-using-a-modified-cubic-tissue-clearing-method
#19
Kyosuke Kagami, Yohei Shinmyo, Masanori Ono, Hiroshi Kawasaki, Hiroshi Fujiwara
BACKGROUND: Recently, we demonstrated the three-dimensional (3D) localization of murine trophoblast giant cells in the pregnant uterus using a modified Clear Unobstructed Brain Imaging Cocktails and Computational analysis (CUBIC) tissue-clearing method and hybrid construct consisting of the cytomegalovirus enhancer fused to the chicken beta-actin promoter (CAG) conjugated enhanced green fluorescent protein (EGFP) transgenic mice. In this study, we applied this method to obtain a transparent whole-image of the ovary and observed the 3D localization of individual oocytes in the developing follicles...
August 2, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30055625/in-vivo-antral-follicle-wall-biopsy-a-new-research-technique-to-study-ovarian-function-at-the-cellular-and-molecular-levels
#20
G M Ishak, S T Bashir, G A Dutra, G D A Gastal, M O Gastal, C A Cavinder, J M Feugang, E L Gastal
BACKGROUND: In vivo studies involving molecular markers of the follicle wall associated with follicular fluid (FF) milieu are crucial for a better understanding of follicle dynamics. The inability to obtain in vivo samples of antral follicle wall (granulosa and theca cells) without jeopardizing ovarian function has restricted advancement in knowledge of folliculogenesis in several species. The purpose of this study in mares was to develop and validate a novel, minimally invasive in vivo technique for simultaneous collection of follicle wall biopsy (FWB) and FF samples, and repeated collection from the same individual, during different stages of antral follicle development...
July 28, 2018: Reproductive Biology and Endocrinology: RB&E
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