Abstract:
BACKGROUND:Preimplantation embryos are particularly susceptible to in vitro developmental blocks. These could be alleviated by lowering culture medium osmolarity. Because mammalian cells regulate their volumes by adjusting intracellular osmotic pressure, cell volume regulation could be critical to early embryos. METHODS:We reviewed the literature on cell volume regulation in preimplantation embryos and the effects of increased osmolarity on embryo development, focusing also on the relation with improvements in embryo culture media. RESULTS:Embryos failed to develop from fertilized oocytes when osmolarity is increased. This could be alleviated by decreasing osmolarity or including certain compounds such as certain amino acids. Early preimplantation mouse embryos require intracellular accumulation of glycine to provide osmotic support and thus control cell volume. The glycine-specific transporter, GLYT1, mediates osmoregulated glycine accumulation in mouse embryos and likely in human embryos. GLYT1 is activated during meiotic maturation starting at ovulation. Prior to this, oocyte size is not independently controlled but instead is determined by strong adhesion between the oocyte plasma membrane and the inner surface of the zona pellucida. CONCLUSIONS:Early preimplantation embryos are particularly sensitive to increased osmolarity, and require the importation of glycine to regulate their cell volumes using a mechanism unique to early embryos. Cell volume regulation first appears when ovulation is triggered, oocyte zona pellucida adhesion is released, and glycine transport is activated. The requirement for supporting these physiological functions in oocytes and embryos should be taken into account when developing and improving systems for in vitro oocyte maturation and embryo culture.
journal_name
Hum Reprod Updatejournal_title
Human reproduction updateauthors
Baltz JM,Tartia APdoi
10.1093/humupd/dmp045subject
Has Abstractpub_date
2010-03-01 00:00:00pages
166-76issue
2eissn
1355-4786issn
1460-2369pii
dmp045journal_volume
16pub_type
杂志文章,评审abstract::Androgen levels are measured in today's clinical practice almost exclusively by immunoassays. The androgen that is most frequently determined is testosterone (T), but sometimes also the levels of other testicular, ovarian and adrenal androgens such as 5alpha-dihydrotestosterone, androstenedione, dehydroepiandrosterone...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmm038
更新日期:2008-01-01 00:00:00
abstract::There has been an improvement in the blastocyst rates achieved following in-vitro embryo production that can largely be attributed to improved embryo culture conditions based on an increased knowledge of the in-vivo environment, as well as the metabolic needs of the embryo. Despite this, in-vitro oocyte maturation (IV...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmg009
更新日期:2003-01-01 00:00:00
abstract::Laparoscopic and hysteroscopic surgery have changed the management of many gynaecological disorders. Procedures that previously required a long duration of hospitalization can now be done on an outpatient basis or with a short hospital stay. Surgical treatment remains the definitive and universal treatment of ectopic ...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/2.5.419
更新日期:1996-09-01 00:00:00
abstract:BACKGROUND:The drug research and development (R&D) for endometriosis/adenomyosis has been painfully slow. Most completed clinical trials on endometriosis did not publish their results, and presumably failed. While few published trials did report how they foundered, the reasons why they failed are often completely uncle...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmy020
更新日期:2018-09-01 00:00:00
abstract:BACKGROUND:Human pregnancy requires robust hemostasis to prevent hemorrhage during extravillous trophoblast (EVT) invasion of the decidualized endometrium, modification of spiral arteries and post-partum processes. However, decidual hemorrhage (abruption) can occur throughout pregnancy from poorly transformed spiral ar...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmw004
更新日期:2016-06-01 00:00:00
abstract:BACKGROUND:The use of nuclear transfer (NT) has been proposed as a novel reproductive treatment to overcome the transmission of maternally-inherited mitochondrial DNA (mtDNA) mutations. Pathogenic mutations in mtDNA can cause a wide-spectrum of life-limiting disorders, collectively known as mtDNA disease, for which the...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmx018
更新日期:2017-09-01 00:00:00
abstract:BACKGROUND:IUI for unexplained infertility can be performed in a natural cycle or in combination with ovarian stimulation. A disadvantage of ovarian stimulation is an increased risk of multiple pregnancies with its inherent maternal and neonatal complication risks. Stimulation agents for ovarian stimulation are clomiph...
journal_title:Human reproduction update
pub_type: 杂志文章,meta分析
doi:10.1093/humupd/dmz035
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Endometriosis is recognized as a steroid-dependent disorder; however, the precise roles of nuclear receptors (NRs) in steroid responsiveness and other signaling pathways are not well understood. OBJECTIVE AND RATIONALE:Over the past several years, a number of paradigm-shifting breakthroughs have occurred in...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmz005
更新日期:2019-07-01 00:00:00
abstract:BACKGROUND:With the recent development of CRISPR (clustered regularly interspaced short palindromic repeats)/Cas9 genome editing technology, the possibility to genetically manipulate the human germline (gametes and embryos) has become a distinct technical possibility. Although many technical challenges still need to be...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmw005
更新日期:2016-06-01 00:00:00
abstract::This review presents detailed risk estimates from relevant epidemiological and other studies on the comparative safety of second and third generation oral contraceptives (OC). Written with the intention of presenting a repository of the available information, it also discourses briefly into the symptomatology and diag...
journal_title:Human reproduction update
pub_type: 历史文章,杂志文章,评审
doi:10.1093/humupd/5.6.565
更新日期:1999-11-01 00:00:00
abstract::The examination of fetal cells, specifically erythroblasts, and cell-free fetal DNA from the blood of pregnant women is currently the subject of intense research with the aim of developing new risk-free methods for prenatal diagnosis. An unexpected finding made during these studies was that the traffic of fetal erythr...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/8.6.501
更新日期:2002-11-01 00:00:00
abstract::In those clinical situations in which an immediate and profound suppression of gonadotrophins is desired, LHRH agonists have the disadvantage of producing an initial stimulatory effect on hormone secretion. Therefore, the use of GnRH antagonists which cause an immediate and dose-related inhibition of LH and FSH by com...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/6.4.322
更新日期:2000-07-01 00:00:00
abstract:BACKGROUND:Estrogens are known to orchestrate reproductive events and to regulate the immune system during infections and following tissue damage. Recent findings suggest that, in the absence of any danger signal, estrogens trigger the physiological expansion and functional specialization of macrophages, which are immu...
journal_title:Human reproduction update
pub_type: 杂志文章
doi:10.1093/humupd/dmy026
更新日期:2018-11-01 00:00:00
abstract::This paper investigates the relationship of features of in-vitro fertilization (IVF) embryos and the associated oocyte and follicle to the outcome of transfer. It differs from previous studies in including a range of features (n = 53) and in using class probability tree analysis. This is a non-parametric multivariate ...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/4.2.121
更新日期:1998-03-01 00:00:00
abstract:BACKGROUND:A dynamic balance between pro- and anti-inflammatory factors contributes to regulating human female reproduction. Chronic low-grade inflammation has been detected in several female reproductive conditions, from anovulation to embryo implantation failure. C-reactive protein (CRP) is a reliable marker of infla...
journal_title:Human reproduction update
pub_type: 杂志文章
doi:10.1093/humupd/dmaa012
更新日期:2020-09-01 00:00:00
abstract:BACKGROUND:Fear from increased cancer risk is one of the most significant reasons for low acceptance of reliable contraceptive methods and low compliance. METHODS:In this review, we included all cohort and case-control studies published in English up to December 2008. They were identified through a search of the liter...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmq022
更新日期:2010-11-01 00:00:00
abstract::This review addresses research on gamete donors, recipients, and offspring and demonstrates that the foci on all three within the triad are largely directed at disclosure or anonymity; and each in turn centers on the perceived importance of the genetic link. The importance attached to genetics has led some countries t...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmi038
更新日期:2006-03-01 00:00:00
abstract::Nitric oxide (NO) is an important mediator of paracrine interactions, especially within the vascular system. It is a powerful inhibitor of platelet aggregation and a potent vasodilator. NO is also a neurotransmitter and it plays a role in cell-mediated cytotoxicity. NO-generating enzymes (nitric oxide synthases, NOS) ...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/4.5.565
更新日期:1998-09-01 00:00:00
abstract:BACKGROUND:Sirtuins (SIRT1-7) are a family of NAD+-dependent deacetylases that catalyze post-translational modifications of proteins. Together, they respond to metabolic challenges, inflammatory signals or hypoxic/oxidative stress, and are associated with aging and longevity. The role of Sirtuins in the regulation of f...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmy003
更新日期:2018-05-01 00:00:00
abstract::Anti-Müllerian hormone (AMH) produced by fetal Sertoli cells is responsible for regression of Müllerian ducts, the anlage for uterus and Fallopian tubes, during male sex differentiation. A member of the transforming growth factor-beta superfamily, AMH signals through two transmembrane receptors, type II which is speci...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmi014
更新日期:2005-07-01 00:00:00
abstract::Endometriosis is considered primarily a disease of the endometrial-subendometrial unit or archimetra. The clinical picture of endometriosis characterises this disease as a hyperactivation of genuine archimetrial functions such as proliferation, inflammatory defence and peristalsis. While the aetiology of the disease r...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/4.5.752
更新日期:1998-09-01 00:00:00
abstract::It has long been known that the testis is an immunologically privileged site in the body, and that human seminal plasma possesses a generalized immunosuppressive activity. Multiple factors participate in the establishment of immunotolerance in the testis: the blood-tubular barrier; the local production of immunosuppre...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/7.5.444
更新日期:2001-09-01 00:00:00
abstract::The improved long-term survival of adolescents and young women treated for cancer has resulted in an increased focus on the effects of chemotherapy on ovarian function and its preservation. These women may seek advice and treatment regarding their reproductive status, including ways of preserving their fertility and p...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmh052
更新日期:2005-01-01 00:00:00
abstract::As soon as leptin was discovered four years ago, its potential as a player in the polycystic ovary syndrome (PCOS) was explored in a primitive way, though little light was shed on the enigma that is PCOS. As a second wave of leptin research is now available, we review how the expanded role of the cytokine in reproduct...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/5.2.166
更新日期:1999-03-01 00:00:00
abstract:BACKGROUND:Monoamines play important roles in decidualization, implantation, immune modulation and inflammation. Furthermore, monoamines are potent vasoactive mediators that regulate blood flow and capillary permeability. Regulation of the uterine blood flow is important both during menstruation and pregnancy. Adequate...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmn048
更新日期:2009-03-01 00:00:00
abstract:BACKGROUND:Zika virus (ZIKV) is an arthropod-borne virus of the family Flaviviridae, genus Flavivirus. ZIKV is currently the focus of an ongoing pandemic and worldwide public health emergency. Although originally isolated in 1947, its pathogenesis was poorly known and very few documented infections were published until...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmx024
更新日期:2017-11-01 00:00:00
abstract::Mammals are generally held to be exceptions to the rule that organization of the egg plays a role in specifying the differentiation of cells, axes, or other aspects of patterning in the early embryo. However, there are several grounds for questioning this conclusion. Not only do certain experimental findings remain un...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/2.1.3
更新日期:1996-01-01 00:00:00
abstract::Millions of women worldwide use combined oral contraception (COC). Most of them are in good health and have no contraindications to using any contraceptive method. Although extremely safe for the vast majority of women and even though the absolute risk of complications is very small, COC is associated with an increase...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmh031
更新日期:2004-09-01 00:00:00
abstract:BACKGROUND:Human long non-coding RNAs (lncRNAs) are an emerging category of transcripts with increasingly documented functional roles during development. LncRNAs and roles during human early embryo development have recently begun to be unravelled. OBJECTIVE AND RATIONALE:This review summarizes the most recent knowledg...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmw035
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:It has been hypothesized that certain obstetrical populations, including women who conceive using assisted reproductive technologies (ART) and women with multiple births, may be at increased risk for postpartum depression. In this systematic literature review, we examine the published evidence for this hypot...
journal_title:Human reproduction update
pub_type: 杂志文章,评审
doi:10.1093/humupd/dmq025
更新日期:2011-01-01 00:00:00