Abstract：
:Spermatogenesis is a critical process for maintaining male fertility. Sustained spermatogonial stem cell self-renewal and differentiation ensures constant spermatogenesis, and several signalling pathways regulate this process. An increasing number of studies have suggested that the mammalian target of rapamycin (mTOR) signalling pathway plays an important role in spermatogenesis; however, the mechanism remains unknown. Our study showed that mTOR was positively related with spermatogenesis by detecting mTOR expression and the expression of its target p70s6k, rps6 and 4e-bp1 at different developmental stages. Phosphorylated p70s6k, rps6 and 4ebp1 levels were independently and gradually down-regulated with age. Subsequently, we showed in vivo and in vitro that, upon mTOR inactivation by rapamycin, the number of sperm significantly decreased (P < 0.05) and spermatogonia proliferation was blocked. Phosphorylated p70s6k and rps6 levels were down-regulated, but the levels of phosphorylated 4e-bp1 did not change. Spermatogonia were treated with the specific PI3K inhibitor LY294002, and p70s6k, rps6 and 4ebp1 phosphorylation overtly decreased. Therefore, we suggest that mTOR plays an important role in spermatogenesis by regulating p70s6k activation and that 4e-bp1 is either directly or indirectly regulated by PI3K.
journal_name
Reprod Biomed Onlinejournal_title
Reproductive biomedicine onlineauthors
Xu H,Shen L,Chen X,Ding Y,He J,Zhu J,Wang Y,Liu Xdoi
10.1016/j.rbmo.2015.11.007subject
Has Abstractpub_date
2016-02-01 00:00:00pages
207-17issue
2eissn
1472-6483issn
1472-6491pii
S1472-6483(15)00551-9journal_volume
32pub_type
杂志文章abstract：:Intracytoplasmic morphologically selected sperm injection (IMSI) involves the use of differential interference contrast microscopy at high magnification (at least ·6300) to improve the observation of live human spermatozoa (particularly by showing sperm head vacuoles that are not necessarily seen at lower magnificatio...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2013.09.019
更新日期：2014-01-01 00:00:00
abstract：:The International Society for Mild Approaches in Assisted Reproduction (ISMAAR) is founded to promote a more physiological, less drug-oriented, lower risk, less expensive and more patient friendly approach to Assisted Reproduction embracing not only natural cycle treatment but also gentle stimulation protocols and in-...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61043-7
更新日期：2007-05-01 00:00:00
abstract：:This study aimed to establish whether patients who receive support counselling by the embryologist as counsellor during assisted reproduction procedures would be better equipped with efficient coping mechanisms than patients who were not counselled. Sixty patients were randomly assigned to either the support counselli...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/s1472-6483(10)61160-1
更新日期：2005-11-01 00:00:00
abstract：RESEARCH QUESTION:What are the optimal values of maternal age and body mass index (BMI), paternal age and BMI, number of oocytes retrieved, and serum AMH concentrations for cumulative live birth rate (CLBR) in IVF and embryo transfer (IVF-ET)? DESIGN:This retrospective cohort study included 9494 women who underwent th...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2020.01.024
更新日期：2020-05-01 00:00:00
abstract：:Recent studies reveal that polycystic ovary syndrome (PCOS) might be associated with cardiovascular autonomic dysfunction, but with inconsistent results. The aim of this meta-analysis was to study whether women with PCOS have cardiovascular autonomic dysfunction. PubMed, Web of Science, Cochrane Library and SCOPUS wer...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.rbmo.2017.03.018
更新日期：2017-07-01 00:00:00
abstract：:This paper examines the importance of a clinical diagnosis in the management of infertility in the male and discusses the reasons for this statement. The treatment of male infertility is now often carried out solely by gynaecologists. These specialists have frequently had little training in the examination of the male...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61436-8
更新日期：2006-09-01 00:00:00
abstract：:In 2012, the Czech Republic established the women's age limit for access to assisted reproduction techniques at age 49 years. In this paper, the acceptability of this age limit from the children's perspective in the Czech Republic is assessed. Although the necessity of balancing the interests of parents and children i...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2015.01.017
更新日期：2015-05-01 00:00:00
abstract：:Time-lapse analysis of tripronucleated zygotes obtained in ICSI cycles showed that 75.4% cleaved into embryos. These embryos subsequently demonstrated slower developmental kinetics than normally fertilized embryos. ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2014.01.009
更新日期：2014-05-01 00:00:00
abstract：:Premature LH and progesterone surges are associated with different factors and hormonal modulators. The aim of the present study was (i) to investigate the clinical and laboratory factors and (ii) to highlight the importance of different stimulation protocols in associated premature LH and progesterone surges in intra...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61751-8
更新日期：2003-09-01 00:00:00
abstract：:The process of implantation and trophoblast invasion is currently considered as the most limiting factor for the establishment of pregnancy. Molecular interactions at the embryo-maternal interface during the time of adhesion and subsequent invasion are crucial to the process of embryonic implantation. Both partners, t...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/s1472-6483(10)61717-8
更新日期：2003-03-01 00:00:00
abstract：:A great deal is now known about the migration of spermatozoa within the female reproductive tract, and how they interact with the oocyte and achieve fertilization in a variety of species. The process involves a series of complex features. It is a mixture of active and passive transport and active migration, with drast...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/s1472-6483(10)61935-9
更新日期：2002-03-01 00:00:00
abstract：:Cryptorchidism is the most frequent congenital anomaly of the urogenital tract in human males. INSL3 and LGR8/GREAT proteins seem to act as ligand and receptor respectively, and to have a role in gubernaculum development involved in testicular descent. Mutations in the INSL3 gene or LGR8/GREAT were found to be associa...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)62144-x
更新日期：2004-09-01 00:00:00
abstract：:Preimplantation genetic screening for aneuploidy continues to excite disagreement, discussion and confusion in the field of reproductive medicine. This commentary provides a contribution to the ongoing debate. ...
journal_title：Reproductive biomedicine online
pub_type： 评论,杂志文章
doi：10.1016/j.rbmo.2018.06.018
更新日期：2018-08-01 00:00:00
abstract：:Gentle ovarian stimulation protocols, such as 'mini-IVF', have several potential advantages over conventional IVF protocols, including less medication and fewer injections, producing fewer eggs, but eggs of higher quality. The particular 'mild' stimulation protocol called 'mini-IVF' is described. This protocol require...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2010.06.033
更新日期：2010-10-01 00:00:00
abstract：RESEARCH QUESTION:Can a combination of time-lapse morphokinetic parameters and cumulus cell gene expression in polycystic ovary syndrome (PCOS) women be used to predict assisted reproductive treatment outcome? DESIGN:A total of 547 embryos from 100 intracytoplasmic sperm injection (ICSI) cycles were evaluated. Fifty w...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2018.10.010
更新日期：2019-02-01 00:00:00
abstract：:Cleavage kinetics of human embryos is indicative of ability to develop to blastocyst and implant. Recent advances in time-lapse microscopy have opened new and important research opportunities. In this study involving infertile couples requiring standard IVF/intracytoplasmic sperm injection treatment, zygotes were cult...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2012.07.016
更新日期：2012-11-01 00:00:00
abstract：:Caesarean scar pregnancy is a dangerous condition that occurs when an embryo is implanted in a previous Caesarean scar. This condition has become more frequent as a direct consequence of the increased number of Caesarean sections reported worldwide. Timely diagnosis of this condition is fundamental, and allows a conse...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2014.06.017
更新日期：2014-11-01 00:00:00
abstract：:The fear that the ethics and practice of egg sharing will be undermined by the growing success of oocyte cryopreservation is not based on published evidence. Separate contracts and directed counselling of donors and recipients as required by law in the UK provide protection against potential pitfalls with egg sharing....
journal_title：Reproductive biomedicine online
pub_type： 评论,杂志文章
doi：10.1016/s1472-6483(10)60997-2
更新日期：2006-03-01 00:00:00
abstract：:The current systematic review and meta-analysis evaluate the perinatal outcomes in twin pregnancies following multifetal pregnancy reduction (MPR) compared with non-reduced triplet pregnancies. All studies comparing perinatal outcome of twin pregnancies following MPR to non-reduced triplet pregnancies were considered....
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.rbmo.2017.05.012
更新日期：2017-09-01 00:00:00
abstract：:While the role of inherited thrombophilia has been accepted as a cause of recurrent late pregnancy complications, the contribution of mutated thrombophilic genes to implantation failure has not been studied. Proteins involved in fibrinolysis are necessary for trophoblast invasion into the endometrium. This study compa...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61004-8
更新日期：2006-03-01 00:00:00
abstract：:A retrospective study recently showed that oocytes presenting with a high birefringence of the inner zona layer were more often associated with conception cycles. To further investigate these findings, a prospective study was conducted between September 2005 and September 2006 including intracytoplasmic sperm injectio...
journal_title：Reproductive biomedicine online
pub_type： 临床试验,杂志文章
doi：10.1016/s1472-6483(10)60580-9
更新日期：2008-02-01 00:00:00
abstract：:X-linked genetic diseases include a wide range of disorders such as the dystrophinopathies. Additionally in some rare genetic diseases, severity of expression is gender dependent. Prevention of such disorders usually involves prenatal diagnosis and termination of affected pregnancies, while preimplantation genetic dia...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60178-2
更新日期：2009-09-01 00:00:00
abstract：:Cell-free seminal mRNA (cfs-mRNA) contains testis-specific transcripts from bilateral testes. This study determined the presence of DEAD box polypeptide 4 (DDX4) in cfs-mRNA to identify and characterize the incidence of Sertoli cell-only (SCO) syndrome in men with non-obstructive azoospermia (NOA). DDX4 cfs-mRNA was d...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2016.05.001
更新日期：2016-08-01 00:00:00
abstract：:The aim of this study was to compare the efficacy of two embryo transfer catheters: Wallace and Rocket Embryon in an IVF programme of a tertiary referral university centre. A total of 308 patients undergoing embryo transfer were prospectively randomized to either a transfer with the Wallace catheter or a transfer with...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/s1472-6483(10)60243-x
更新日期：2008-10-01 00:00:00
abstract：RESEARCH QUESTION:Fat accumulation is present in most post-menopausal women, but the underlying mechanism remains unclear. Aquaporin 7 (AQP7) is the most important glycerol channel facilitating glycerol efflux in adipocytes. High circulating FSH in post-menopausal women may play an independent role in regulation of the...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2020.08.008
更新日期：2020-12-01 00:00:00
abstract：:The aims of this study were to investigate the relationship between inhibins, activin A and follistatin in first trimester fetal fluids, maternal serum, placenta and decidua, and to investigate if these hormones are present in the circulation of the early second trimester human fetus. Amniotic and coelomic fluid, mate...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61653-7
更新日期：2004-06-01 00:00:00
abstract：:Today an accurate diagnosis of adenomyosis can be made thanks to progress in imaging techniques: sonography and magnetic resonance imaging (MRI). This has made it possible to clinically correlate the presence of adenomyosis to infertility. At the same time, a series of pathogenetic hypotheses have been presented to ex...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2011.10.003
更新日期：2012-01-01 00:00:00
abstract：:The relationship between endogenous LH concentrations and ongoing pregnancy rates among normogonadotrophic patients undergoing ovarian stimulation in a gonadotrophin-releasing hormone antagonist protocol were examined. In the Engage trial, 1506 patients received corifollitropin alfa (150 μg) or daily recombinant FSH (...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.rbmo.2011.06.015
更新日期：2011-10-01 00:00:00
abstract：:Tubulin is a protein constituent of cytoskeletal microtubules, closely related to sperm motility. However, the changes in tubulin distribution following capacitation and acrosome reaction are poorly understood. This study immunolocalized and quantified the expression of α-tubulin in fresh, capacitated and acrosome-rea...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2013.10.001
更新日期：2014-02-01 00:00:00
abstract：:This study aimed to investigate whether the spermatozoa-zona pellucida binding test is able to select spermatozoa with higher fertilization potential and higher rate of successful embryo development. This prospective study was performed with metaphase II (MII) oocytes retrieved from couples undergoing intracytoplasmic...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.09.020
更新日期：2009-12-01 00:00:00
