Cannabinoids have long been suspected associating with abnormal fetal growth and outcome. However, the molecular mechanisms in which they are involved had long been obscure for several decades. Only recently, after th...Cannabinoids have long been suspected associating with abnormal fetal growth and outcome. However, the molecular mechanisms in which they are involved had long been obscure for several decades. Only recently, after the identification of two types of cannabinoid receptors （CB1-R and CB2-R） and the following discoveries of their corresponding endogenous ligands, the mystery behind those seemingly facts began gradually unveiled. Through a series of landmark research, it is now indicated that the endocannabinoid signaling via the ligand-receptor interaction plays an important role in modulating early development of preimplantation embryo and synchronizing embryo development with uterine receptivity for implantation. Current data suggest that the physiological functions their metabolic pathways are potentially very of endocannabinoid signaling as well as exited areas to be explored further. This review will first introduce the reproductive functions of endocannabinoid signaling from epidemiological and molecular background, then focus on its reciprocal interactions between the embryo and maternal tissues, as well as related metabolic aspects in regards to implantation. It is hoped that further investigation of this physiologically fundamental signaling will generate more exciting information elucidating the complexity of implantation thus lead to a better control of human reproduction.展开更多
Objective To investigate the effect of the glucose-free preimplantation stage one （P1） medium and the ECM medium on embryo development quality in IVF. Methods The patients with ≥4 zygotes of 2PN were studied. A tot...Objective To investigate the effect of the glucose-free preimplantation stage one （P1） medium and the ECM medium on embryo development quality in IVF. Methods The patients with ≥4 zygotes of 2PN were studied. A total of 201 retrieval cycles were included in a prospective randomized study. Each patient was herself control. Half of zygotes of 2PN were transferred into ECM medium （group A） and half into P1 medium （group B）for further culture. Embryo development was evaluated on the day of embryo transfer. The efficacy of ECM was compared with P1 as culture medium for the development of preimplantation embryos. Results No statistically significant differences were noted between the two groups regarding embryo-cleavage rate （97.13% vs 97.55%） and rate of normal-cleaving embryos （58.29% and 58.37%）. The rate of top-quality embryos was statistically higher in group A than in group B （27.59% vs 19.75%, P〈O.05）. Embryo quality, as assessed by morphological parameters （the amount of detached anuclear fragments 〉30%）, was better in group A than in group B （19.86% vs 21.75%）, however, there was no statistically significance. Both the rate of good-quality embryos （47.95% vs 46.17%） and available embryos （63.22% vs 61.19%） were higher in group A than in group B, but there was also no statistically significance. Conclusion The ECM medium may be associated with a better embryo quality compared with the P1 medium.展开更多
基金This study was supported by grants from National Natural Science Fundation of China(No.30470654)
文摘Cannabinoids have long been suspected associating with abnormal fetal growth and outcome. However, the molecular mechanisms in which they are involved had long been obscure for several decades. Only recently, after the identification of two types of cannabinoid receptors （CB1-R and CB2-R） and the following discoveries of their corresponding endogenous ligands, the mystery behind those seemingly facts began gradually unveiled. Through a series of landmark research, it is now indicated that the endocannabinoid signaling via the ligand-receptor interaction plays an important role in modulating early development of preimplantation embryo and synchronizing embryo development with uterine receptivity for implantation. Current data suggest that the physiological functions their metabolic pathways are potentially very of endocannabinoid signaling as well as exited areas to be explored further. This review will first introduce the reproductive functions of endocannabinoid signaling from epidemiological and molecular background, then focus on its reciprocal interactions between the embryo and maternal tissues, as well as related metabolic aspects in regards to implantation. It is hoped that further investigation of this physiologically fundamental signaling will generate more exciting information elucidating the complexity of implantation thus lead to a better control of human reproduction.
文摘Objective To investigate the effect of the glucose-free preimplantation stage one （P1） medium and the ECM medium on embryo development quality in IVF. Methods The patients with ≥4 zygotes of 2PN were studied. A total of 201 retrieval cycles were included in a prospective randomized study. Each patient was herself control. Half of zygotes of 2PN were transferred into ECM medium （group A） and half into P1 medium （group B）for further culture. Embryo development was evaluated on the day of embryo transfer. The efficacy of ECM was compared with P1 as culture medium for the development of preimplantation embryos. Results No statistically significant differences were noted between the two groups regarding embryo-cleavage rate （97.13% vs 97.55%） and rate of normal-cleaving embryos （58.29% and 58.37%）. The rate of top-quality embryos was statistically higher in group A than in group B （27.59% vs 19.75%, P〈O.05）. Embryo quality, as assessed by morphological parameters （the amount of detached anuclear fragments 〉30%）, was better in group A than in group B （19.86% vs 21.75%）, however, there was no statistically significance. Both the rate of good-quality embryos （47.95% vs 46.17%） and available embryos （63.22% vs 61.19%） were higher in group A than in group B, but there was also no statistically significance. Conclusion The ECM medium may be associated with a better embryo quality compared with the P1 medium.
