Generation of developmentally competent oocytes and fertile mice from parthenogenetic embryonic stem cells

Parthenogenetic embryos, created by activation and diploidization of oocytes, arrest at mid-gestation for defective paternal imprints, which impair placental development. Also, viable offspring has not been obtained without genetic manipulation from parthenogenetic embryonic stem cells (pESCs) derived from parthenogenetic embryos, presumably attributable to their aberrant imprinting. We show that an unlimited number of oocytes can be derived from pESCs and produce healthy offspring. Moreover, normal expression of imprinted genes is found in the germ cells and the mice. pESCs exhibited imprinting consistent with exclusively maternal lineage, and higher X-chromosome activation compared to female ESCs derived from the same mouse genetic background. pESCs differentiated into primordial germ cell-like cells (PGCLCs) and formed oocytes following in vivo transplantation into kidney capsule that produced fertile pups and reconstituted ovarian endocrine function. The transcriptome and methylation of imprinted and X-linked genes in pESC-PGCLCs closely resembled those of in vivo produced PGCs, consistent with efficient reprogramming of methylation and genomic imprinting. These results demonstrate that amplification of germ cells through parthenogenesis faithfully maintains maternal imprinting, offering a promising route for deriving functional oocytes and having potential in rebuilding ovarian endocrine function.

Correction to: Characterization of oogonia stem cells in mice by Fragilis

In the original publication the labelling on Fig. 2A and B were incorrectly published as E7.5. The correct labelling of Fig. 2A and B should be read as E17.5 which is provided in this correction.

Correction to: Characterization of oogonia stem cells in mice by Fragilis

In the original publication the labelling of Figure 1D, Y-axis is incorrectly published. The correct labeling should be read as Fragilis+/SSEA1+ and the correct figure is provided in this correction.

Correction to: Characterization of oogonia stem cells in mice by Fragilis

In the original publication the labelling of Figure 1D, Y-axis is incorrectly published. The correct labeling should be read as Fragilis+/SSEA1+ and the correct figure is provided in this correction.

Analysis of clinical curative effect of the therapy of goserelin combined with microwave on postoperative patients of endometriosis / 中国基层医药

Objective To observe the clinical efficacy of therapy of application of goserelin(Zoladex)com-bined with microwave on patients with endometriosis after laparoscopic surgery.Methods 188 patients with endome-triosis were randomly divided into two groups according to the randomized digital table method,with 94 cases in each group,as the observation group(Zoladex combined with microwave therapy group)and the control group(Zoladex treatment group).Among them there were 80 patients with infertility,45 cases in the observed group and 35 cases in the control group.After treatment,the clinical efficacy rate,recurrence rate and pregnancy rate of patients with infertil-ity were compared between the two groups.Results The efficiency of the observation group was significantly higher than that of the control group(80.12% vs.65.31%,χ2 =5.338,P <0.05),and the recurrence rate of the observa-tion group was lower than that of the control group(22.34% vs.38.56%,χ2 =8.325,P <0.05),the difference was statistical significance.The pregnancy rate of patients with infertility in the observation group were significantly higher than that of the control group,and the difference was statistically significant[64.38%(29 /45)vs.44.46%(16 /35)χ2 =4.531,P <0.05].Conclusion As for patients with endometriosis after laparoscopic surgery,the therapy of Zoladex drug treatment assisted with microwave treatment at the same time,could achieve good clinical curative effect and low recurrence rate,and could improve the pregnancy rate of patients with infertility.

Correlation analysis between post-stroke constipation and brain injury / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the incidence of constipation after stroke and explore the relationship between post-stroke constipation and brain injury.</p><p><b>METHODS</b>Using a self-designed questionnaire, we collected the general information of 723 inpatients from 10 hospitals in Guangzhou, including the general demographic information, related factors of brain injury, defecation and previous history.</p><p><b>RESULTS</b>The total incidence of post-stroke constipation was 34.6% in these patients. The incidence of constipation was 31.0% in ischemic stroke patients, 44.8% in hemorrhagic stroke patients, and 47.4% in patients with cerebral hemorrhage and infarction, showing a significant difference between stroke types (χ(2)=12.369, P=0.002). In terms of stages following stroke, the incidence was 41.6% in the acute phase, 31.5% in the recovery phase, and 22.6% in the sequelae phase. In light of lesion locations, the incidence was significantly higher in patients with basal ganglia involvement than in those without (P<0.001). Logistic multivariate analyses showed that stroke type, post-stroke stage, lesion number and basal ganglia involvement were significantly associated with the incidence of constipation.</p><p><b>CONCLUSION</b>Constipation often occurs in the acute stage following stroke (especially hemorrhagic stroke), and the incidence is higher in patients with basal ganglia involvement.</p>

Influencing factors of selecting vascular access device for tumor patients undergoing intravenous therapy / 现代临床护理

Objective To probe into the influencing factors of selecting the intravenous vascular access device for tumor patients undergoing intravenous therapy? Methods With convenience sampling,376 tumor patients in oncology department from 3 hospitals of class A hospitals in Guangzhou were selected for the survey including such 6 categories with 41 items as general data, patient’s willingness,punctured blood vessels,use of vascular access and clinical conditions? Results In 124 patients,peripheral venous catheter was used (33?0%)? Central venous catheter was used in 252 patients (67?0%),Multiple linear regression analysis showed that way for paying the expense,vascular conditions for venous punctuation,phased diagnosis,decision of the doctors,and prospected duration for detaining catheter significant influencing factors? Conclusions The state should raise their medical allowances for those with lower incomes? The administrative should enhance the training to doctors and nurses at grass levels,promote the communication between medical workers and patients and improve their recognition of transfusion devices so that they can make a right choice?

Nursing and study on correlation among cognitive dysfunction and post-stroke constipation / 中国实用护理杂志

Objective To understand the status of cognitive dysfunction among new onset constipation after stroke and to explore the relationship between them.Methods With a self-designed questionnaire,the general information of 723 inpatients from 10 hospitals in Guangzhou were collected,including general demographic information,stroke situation,defecation situation and Mini-mental State Examination (MMSE)etc.Results The incidence of new-onset constipation,cognitive dysfunction(PSCD)after stroke was respectively 34.6％ and 62.4％.Among whom 31.0％ in ischemic stroke,44.8％ in hemorrhagic stroke,47.4％ in cerebral hemorrhage and infarction.There was statistical significance between stroke type and constipation,and ischemic stroke had statistical significance compared to other two types.During the acute phase reached 41.6％,the recovery phase 31.5％ and the sequelae phase 22.6％.The rates of constipation patients with cognitive dysfunction were higher than patients without cognitive dysfunction,and the difference in directional force,memory,attention and calculation force,reading and expression was statistically significant respectively,among which expression was the most relevant.The difference in the incidence of constipation among different cognitive dysfunction groups was statistically significant,and they were positively correlated,compared with normal cognitive function,the light,medium and severe cognitive dysfunction was 1.519,2.879,3.064 times respectively.Conclusions Medical staff need to be alerted to the possibility that patients with impared cognitive function may be at greater risk of constipation.The preventive and treatment measures should be emphasized in order to improve patients' cognitive function.