Frizzed家族基因mRNA在小鼠动情周期卵巢组织中的表达规律

运用Real-time Q-PCR方法分析了Frizzed1-10mRNA在小鼠动情周期卵巢中的相对表达水平.结果发现10个Frizzed家族基因中,除Frizzed8外,其他均有不同水平的表达.其中Frizzed1和2在动情前期表达水平显著高于其他3个时期水平,约是间情期水平的4倍(P<0.05);动情前期和间情期的Frizzed3表达水平约是另2个时期的1.5倍(P<0.05);Frizzed4在动情期表达水平显著高于其他3个时期,约是间情期的3倍(P<0.05);间情期Frizzed5表达水平显著高于动情前期和动情期,约是动情期的5倍(P<0.05);Frizzed7表达类似于Frizzed5,间情期表达水平约是动情前期的4倍(P<0.05);Frizzed10的表达在动情前期表达水平约是动情期的3倍(P<0.05);Frizzed6和9在4个时期的表达无显著差别(P<0.05).以上结果表明:Frizzeds在4个动情时期卵巢中广泛而差异表达,并推测Frizzed1—4可能在动情周期卵泡发育过程中具有重要作用.     

Innervation of the ovary in amphioxus: ultrastructural and immunohistochemical study

The distribution of unmyelinated nerve fiber in the ovary of amphioxus was found with transmission electron microscopic technique for the first time. The fiber is located under the ovary coat, and in close contact with it. There are two types of synaptic vesicles in the terminals of nerve fiber: one is durse-cored vesicle, the other is clear vesicle. In addition, the nerve terminals contact with follicle cells of ovary can be seen. Using immunohistochemical method. it is further demonstrated that the unmyelited nerve fiber nlay be a noradrenergic nerve fiber which is located on the ovary coat and follicle cell.     

中华绒螯蟹卵巢新基因EJO5的全长cDNA克隆和序列分析

利用RACE技术从中华绒螯蟹卵巢获得了新基因EJO5 (Eriocheirjaponicaovarygene 5 ,EJO5 )的全长cD NA序列 (GenBank检索号 :AY185 92 1) .该cDNA序列长度为 14 2 5bp ,开放阅读框为 5 85bp ,编码 194个氨基酸 .根据氨基酸序列计算的相对分子质量和等电点分别为 2 2 3 44和 9 5 .用生物信息学的方法未能得到对该基因功能预测的信息 .     

The study of the cultivation of chinese hamster ovary and bowes cell lines with poly(organophosphazene) membranes

Sixteen poly(organophosphazenes) were prepared by reaction between polydichlorophosphazene (NPCl2)n and nucleophilic reagents such as phenoxides and amino compounds. Adhesive and colony formation percent were investigated using V-79 Chinese hamster cells on poly(organophosphazene) films. It was found that [NP(OC6H5)2-x(NHBu-n)x]n (x = 0.2, 1.8) gave the best percent adhesiveness. This value was similar to that of Falcon. On the other hand, [NP(OC6H5)-(NHBu-n)]n film showed best colony percent formation. This was of a higher value than that of Falcon. The [NP(OC6H5)2]n properties were poor for cultivation of useful Bowes and chinese hamster ovary cell lines in comparison with Cytodex III.     

Characterization of cellular chemical dynamics using combined microfluidic and Raman techniques

The integration of a range of technologies including microfluidics, surface-enhanced Raman scattering and confocal microspectroscopy has been successfully used to characterize in situ single living CHO (Chinese hamster ovary) cells with a high degree of spatial (in three dimensions) and temporal (1 s per spectrum) resolution. Following the introduction of a continuous flow of ionomycin, the real time spectral response from the cell was monitored during the agonist-evoked Ca²⁺ flux process. The methodology described has the potential to be used for the study of the cellular dynamics of a range of signalling processes. Figure Spectral mapping of a single CHO cell     

油菜0guCMS与诸葛菜属间杂种的获得

采用子房培养方法,获得了油菜OguCMS与诸葛菜属间杂种．授粉7～27d的子房在附加不同激京组合的MS培养基上培养．两个多月后,从一种培养基上裂开的成熟子房中长出胚性芽．此芽在附加6-BA 2mg/L和NAA 0.2mg/L的MS培养基上快繁．经鉴定,此苗的染色体数为2n=31,该属间杂种获得率为0.0072％．杂种苗经生根培养后,移入试验田,进行了形态学观察．     

生长分化因子-9在大鼠卵巢中的表达

目的：探讨生长分化因子-9(GDF-9)在大鼠卵巢中的表达部位。方法：选择不同发育时期的大鼠卵巢,采用免疫组化和Western blot技术检测大鼠卵泡各发育阶段GDF-9蛋白表达情况及分布规律。结果：免疫组化方法显示,出生0～2d卵巢中未见GDF-9表达,出生3d卵巢中见部分原始卵泡卵母细胞GDF-9表达阳性,以后从初级卵泡到发育成熟的卵泡卵母细胞均明显可见GDF-9蛋白表达。Western blot技术进一步提示,出生0-2d卵巢中无GDF-9蛋白形成,第3d开始有GDF-9蛋白产生,以后在卵巢发育的各时期均有GDF-9蛋白分泌。结论：GDF-9在卵巢发育的早期即开始产生,以后在各阶段卵巢中持续表达,提示卵母细胞通过产生GDF-9等因子对卵泡的发育进行调节。     

野生型人DNA polβ高表达中国仓鼠卵巢细胞系的建立及其生物学特征

脂质体转染法将野生型人DNA聚合酶beta(polβ)重组绿色荧光蛋白表达载体转染入中国仓鼠卵巢细胞系(CHO),经G418筛选得到稳定高表达人野生型polβ的CHO细胞.通过RT-PCR方法检测转染细胞polβmRNA的表达水平,流式细胞仪测细胞周期,软琼脂实验测细胞恶性增殖能力,6-TG实验测细胞自发突变率,以探讨转染细胞的生物学特性.结果显示,转染细胞polβ的mRNA的表达较空载体转染细胞、对照细胞增加,细胞周期多被阻滞在S期,细胞软琼脂集落形成率增高,自发突变率增加,表明polβ的过表达与细胞周期的分布、细胞恶性增殖程度、遗传稳定性相关.     

作物外源总体DNA导入技术及研究概况

对国内外作物外源总体ＤＮＡ导入技术及研究进展进行了综述。介绍了ＤＮＡ的制备，ＤＮＡ浓度、纯度及活性的鉴定，外源总体ＤＮＡ导入的方法及后代鉴定等主要技术环节。总结了该项技术所取得的成就及应用前景。     

Exosomal MicroRNA as Biomarkers for Diagnosing or Monitoring the Progression of Ovarian Clear Cell Carcinoma: A Pilot Study

Ovarian cancer is the most common cause of gynecological malignancy-related mortality since early-stage disease is difficult to diagnose. Advanced clear cell carcinoma of the ovary (CCCO) has dismal prognosis, and its incidence has been increasing in Japan, emphasizing the need for highly sensitive diagnostic and prognostic CCCO biomarkers. Exosomal microRNAs (miRNAs) secreted by tumor cells are known to play a role in carcinogenesis; however, their involvement in ovarian cancer is unclear. In this study, we performed expression profiling of miRNAs from exosomes released by five cell lines representing different histological types of ovarian cancer. Exosomes isolated from culture media of cancer and normal cells were compared for miRNA composition using human miRNA microarray. We detected 143 exosomal miRNAs, whose expression was ≥1.5-fold higher in ovarian cancer cells than in the control. Among them, 28 miRNAs were upregulated in cells of all histological ovarian cancer types compared to control, and three were upregulated in CCCO cells compared to other types. Functional analyses indicated that miR-21 overexpressed in CCCO cells targeted tumor suppressor genes PTEN, TPM1, PDCD4, and MASP1. The identified miRNAs could represent novel candidate biomarkers to diagnose or monitor progression of ovarian cancer, particularly CCCO.