Proteome changes of porcine follicular fluid during follicle development

Background:Ovarian follicular fluid influences follicle and oocyte growth,but the fluctuation of its protein content during folliculogenesis has not been comprehensively analyzed.Here we used a shotgun approach and bioinformatics analyses to investigate and compare the proteomes of porcine follicular fluid(pFF)obtained from small(<4 mm),medium(4–6 mm)and large(>6–12 mm)follicles.Results:Follicular fluid samples containing highest estrogen levels were selected as non-atretic from small(SNA:26.1±15 ng/mL),medium(MNA:162±54 ng/mL),and large(LNA:290±37 ng/mL)follicles for proteomic analyses.We detected 1627,1699,and 1756 proteins in SNA,MNA,and LNA samples,respectively.Nearly 60–63%of total proteins were specific to each sample,11–13%were shared in pairwise comparisons,and 247 proteins were shared among all samples.Functional categorization indicated comparable gene ontology(GO)terms distribution per cellular component,molecular function,and biological process categories across samples;however,the ranking of highly significantly enriched GO terms per category revealed differences between samples.The patterns of proteinto-protein interactions varied throughout follicle development,and proteins such as serine protease inhibitor,clade E(SERPINE);plasminogen activator,urokinase(PLAU);and plasminogen activator,urokinase receptor(PLAUR)appeared stage-specific to SNA,MNA,and LNA,respectively.The“complement and coagulation cascades”was the common major pathway.Besides,properdin and fibulin-1 were abundant proteins that appeared absent in LNA samples.Conclusion:This study provides extensive and functional analyses of the pFF proteome changes during folliculogenesis and offers the potential for novel biomarker discovery in pFF for oocyte quality assessment.

Association of the microbial culture of follicular fluid,vaginal swab and catheter tip with β-hCG IVF positive and negative

Objective:To find out the association of microbial contamination withβ-human chorionic gonadotropin(β-hCG)in-vitro fertilization(IVF)positive and negative.Methods:A total of 73 fresh IVF cycle women were included in the retrospective study.Vaginal swab culture samples were collected prior to ovum pick-up and embryo transfer.The follicular fluids were collected during ovum pick-up and catheter tip culture samples were collected after successful embryo transfer.After 14 days of the embryo transfer,women were classified intoβ-hCG IVF positive and negative.The comparative statistical analyses of aerobic microbial culture reports were done betweenβ-hCG IVF positive and negative women.Results:Out of 73 women,42(57.5%)were found to beβ-hCG IVF positive and 31(43.5%)were negative.In the aerobic culture of ovum pick-up vaginal swab,follicular fluid,embryo transplantation vaginal swab and catheter tip,Enterococcus faecalis was found to be higher compared to other bacteria(Streptococcus spp.,Candida,Escherichia coli and Klebsiella).Regarding the comparison between IVF positive and negative,the overall microbial infection rate of vaginal swab culture during ovum pick-up and embryo transplantation was found to be higher in IVF negative women than in IVF positive women(38.71%vs.28.57%);however,it was not statistically significant(P>0.05).The follicular fluid and catheter tip culture microbial infection rate was found to slightly higher in IVF positive women than in IVF negative women(54.76%vs.41.94%and 19.05%vs.9.68%,respectively),but there were not significant differences(P>0.05).Conclusions:The aerobic microbial culture reports of follicular fluid,vaginal swab culture,and catheter tip culture are not statistically significantly withβ-hCG IVF positive.

Protein Expression of Goat Follicular Fluid （GFF）

Oocyte maturation process is very complex. Until now synthesis and protein function as well as pathway mechanism in oocyte maturation process are not yet well understood. The mechanism of goat follicular fluid （GFF） in maturation in vitro medium needs to be deeply studied before it is implemented widely. The aim of the research was analyzing the GFF to know protein expression of ERK1, ERK 2, p90rsk, Cyclin-Bl and cdc25A by Western Blotting method. GFF collection by aspiration from small follicle （〈 4 mm） and big follicle （4-8 mm） by using needle with spuit size of 18 G. It was concluded that there was protein expression of ERK2 and p90rsk, at 42 kDa and 22 kDa respectively.

Influence of Follicular Fluid on <i>in Vitro</i>Maturation and Fertilization of Bovine Oocytes

The aim of this study was to investigate the effect of time on in vitro maturation of bovine oocytes and of the addition of follicular fluid on meiotic progression. The cumulus-oocyte complexes (COCs) collected from 3 to 6 mm follicles were obtained from ovaries of slaughtered female animals. The medium of maturation was supplemented or not with 20 μL follicular fluid (FF);661 oocytes were matured in vitro (extrusion of the first polar corpuscle) for 22 hours with added follicular fluid (AFF) (72.01%) or without follicular fluid (WFF) (67.53%) and 679 oocytes were matured in vitro for 26 hours (extrusion of the first polar corpuscle) with AFF (92.1%) and WFF (77.15%). The results of extrusion of the second polar corpuscle as an event related to the fertilization percentages showed that the increase in the fertilization rate is maintained at 26 hours with AFF (79.45%), but the percentage decreases WFF (65.08%). After 22 hours, the fertilization rate was 62.38% AFF and 53.40% WFF. The developmental competence of bovine oocytes is affected by the duration of maturation in vitro and the inclusion in the FF culture medium. The use of follicular fluid in the in vitro maturation medium may be a biological strategy to increase the cumulus expansion, the nuclear maturation and the in vitro fertilization.

Effect of Follicular Fluid Lactoferrin Level on Oocytes Quality and Pregnancy Rate in Intracytoplasmic Sperm Injection Cycles

Assessment of oocyte quality to avoid overproduction of embryos is now considered an important goal in ICSI cycles. Although in classic Intra Cytoplasmic Sperm Injection (ICSI) cycles selection is mainly done for embryos and not for follicles. Follicular fluid and its contents representing the oocyte environment are now gaining more attention because not only of its crucial influence on oocyte developments but also due to easy isolation of follicular fluid with every case of ICSI. By its aspiration during ovum pick up (OPU). substances isolated from follicular fluid to assess oocyte quality were in the form of: hormones like, Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH), Anti-mullerian Hormon (AMH), Growth Hormone (GH) etc., growth factors like Insulin Like Growth Factor (ILGF), proteins and amino acids like Lactoferrin (LF) which is an iron-binding glycoprotein that was detected in follicular fluid and was thought to be related to good oocyte quality when present in high concentration. Objectives: The aim of this study was to detect the possible effect of follicular fluid lactoferrin on oocyte quality and hence pregnancy rate in ICSI cycles. Methods: Follicular fluid was obtained from 64 patients undergoing Intra-cytoplasmic sperm injection (ICSI) procedure in Ain Shams University Maternity Hospital. Follicular fluid (FF) was collected at the time of oocyte harvesting. The lactoferrin concentration in FF was assayed by ELISA. Results: The mean LF concentration in follicular fluid of the positive biochemical pregnancy group (0.63 ± 0.17 ng/mL) was not significantly higher than that in the negative biochemical pregnancy (0.61 ± 0.16 ng/mL). A positive correlation between a number of mature oocytes and lactoferrin concentration was not found (r.101). Conclusion: Lactoferrin level in follicular fluid does not correlate with oocytes quality or pregnancy rate.

Follicular fluid levels of prostaglandin E2 and the effect of prostaglandin E2 on steroidogenesis in granulosa-lutein cells in women with moderate and severe endometriosis undergoing in vitro fertilization and embryo transfer

Background The mechanisms of endometriosis with infertility have not been fully studied. The present study aimed to assess the follicular fluid （FF） levels of prostaglandin E2 （PGE2）, which plays a critical role within the ovary, and to investigate the effect of PGE2 on steroidogenesis in granulosa-lutein cells （GLCs） from women with and without endometriosis. Methods Thirty-three women with laparoscopically documented endometriosis and 40 controls undergoing in vitro fertilization （IVF） were studied. We assayed the concentrations of PGE2 in FF, the production of E2 and progesterone in FF and in culture medium, and the expression of steroidogenic acute regulatory protein （STAR） and CYP19A1 in GLCs with the intervention of PGE2. Results PGE2 and progesterone concentrations were increased and displayed positive correlation in endometriotic FE PGE2 induced the expression of STAR and the production of progesterone in GLCs from women with endometriosis, and the expression of STAR and the production of progesterone were increased in GLCs from women with endometriosis. However, there were no significant effects of PGE2 on promoting the production of E2 or the expression of CYP19A1 in GLCs. Moreover, the production of E2 and the expression of CYP19A1 in GLCs from women with endometriosis were significantly decreased compared to the controls. Conclusions PGE2 concentrations are increased in endometriotic FF, along with concomitant increases in progesterone and STAR. In contrast, the E2 and CYP19A1 are decreased in GLCs, which may delay the development of the follicles and cause an imbalance in the follicular steroid hormone levels. These changes may have close relationship with endometriosis-associated infertility.

Follicular hyperandrogenism and insulin resistance in polycystic ovary syndrome patients with normal circulating testosterone levels

Polycystic ovary syndrome（PCOS） is a common reproductive disease with high heterogeneity. The role of excess androgen in PCOS etiology remains disputed, since around 20%-50% of PCOS women do not display hyperandrogenemia. The microenvironment of the ovary critically influences follicular development. In the present study, we assessed the role of androgen in PCOS by investigating whether excessive follicular fluid androgen was present in PCOS patients with normal serum androgen levels and influenced by follicular fluid insulin resistance（IR）.Follicular fluid samples of 105 women with PCOS and 105 controls were collected. Levels of steroid hormones,glucose and insulin in the follicular fluid were examined and compared with data from serum biochemistry tests. We found that 64.9%（63/97） of PCOS patients with normal serum androgen levels displayed abnormally high follicular fluid androgen level. The follicular fluid androgen level was positively correlated with follicular fluid IR within a certain range and follicular fluid estrogen-to-testosterone（E2/T） ratio was significantly reduced in these patients.These results indicated that there existed a subgroup of PCOS patients who displayed excessive follicular fluid androgen and IR despite their normal circulating testosterone（T） levels. Our study highlights the importance of ovary hyperandrogenism and IR in the etiology of PCOS.

子宫内膜异位症患者卵泡液外泌体miRNA谱差异及生信分析

目的探讨子宫内膜异位症(EMT)患者卵泡液来源的外泌体差异微小RNA(miRNA)对卵母细胞质量的影响。方法收集2021年12月—2022年3月在广州市第一人民医院生殖医学中心进行体外受精-胚胎移植/卵细胞浆内单精子注射助孕的20例不孕症患者的卵泡液,分为EMT组(EMT不孕症患者10例)和对照组(单纯男性因素不孕症患者10例)。采用高通量测序对卵泡液外泌体微小RNA(miRNA)谱进行分析,选出具有组间差异的miRNAs。结果与单纯男性因素不孕患者相比,EMT组有18个外泌体miRNAs差异有统计学意义,其中上调9个、下调9个。靶基因预测并采用GO和KEGG富集分析发现,这些靶基因主要参与磷脂酰肌醇-3-激酶/蛋白激酶B(PI3K-Akt)、核苷酸结合寡聚结构域NOD样受体、Ras等信号通路。结论EMT患者卵泡液来源的外泌体miRNA存在差异,差异的外泌体miRNAs可能通过多个信号通路影响EMT患者卵母细胞质量。

猪卵泡液外泌体处理卵巢颗粒细胞的SNP/Indel筛选分析

旨在分析卵泡液外泌体对卵巢颗粒细胞基因的影响,了解卵泡液外泌体在卵泡发育过程中的调控机理,为母猪繁殖研究提供理论依据。本研究选取6月龄、健康状态良好且体重相近的二元母猪为材料,屠宰后收集卵巢150枚,利用梯度离心法获取卵泡液外泌体与猪卵巢颗粒细胞(porcine ovarian granulosa cells,POGCs),并在体外将卵泡液外泌体与猪卵巢颗粒细胞共培养。通过RNA-seq技术对猪卵巢颗粒细胞(granulosa cell samples,GC,n=3)和与外泌体共培养的猪卵巢颗粒细胞(granulosa-exosome co-culture samples,GCE,n=3)进行测序。结果显示,在GC和GCE组中平均每个样品获得5.54×10^(7)条clean reads,Q20和Q30质量得分均在92%以上。在GC和GCE组的6个样品中共获得1310979个SNPs突变和104498个InDel突变,其中纯合型SNP/Indel突变数量为170426个,杂合型SNP/Indel突变数量为1245052个,突变杂合子数目明显高于纯合子且SNP的发生率较高。另外,在突变类型中,转换类型共计973003个,颠换类型339974个,转换的类型显著高于颠换类型。经基因注释,突变主要发生在基因3′UTR、5′UTR、内含子区域,其次为外显子和基因间隔区。另外,通过与差异基因对比后,够筛选出1583个候选基因,经GO和KEGG功能富集发现,候选基因主要与细胞周期以及细胞增殖/凋亡过程相关。此外,共发现14个与细胞周期、增殖/凋亡通路相关的关键候选基因,其中11个基因存在互作关系。本研究获得的这些SNP/Indel信息可为后续研究外泌体在母猪生殖上的调控奠定科学基础。

卵巢微环境内邻苯二甲酸酯暴露与炎性因子水平的关系

目的:评估卵巢微环境内邻苯二甲酸酯(phthalates,PAEs)暴露与炎性因子水平的关系。方法:纳入2020年4—12月接受体外受精/卵胞质内单精子注射-胚胎移植治疗的64例患者,测定其卵泡液内10种邻苯二甲酸酯代谢物(phthalate metabolites,mPAEs)及2种炎性因子的水平。通过多元线性回归模型评估卵巢微环境内mPAEs暴露与炎性因子水平的关系,并进一步按年龄分层分析。结果:卵泡液中邻苯二甲酸单丁酯(MBP)水平与肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)水平(β=0.446,P=0.003)及白细胞介素-6(interleukin-6,IL-6)水平(β=0.425,P=0.003)均呈正相关,邻苯二甲酸(2-乙基-5-氧己基)单酯(MEOHP)水平与TNF-α水平呈正相关(β=0.411,P=0.019)。在分层分析中,年龄≥30岁组卵泡液中MBP水平与TNF-α水平(β=0.667,P=0.000)及IL-6水平(β=0.407,P=0.028)均呈正相关,在年龄<30岁组内未观察到mPAEs与炎症因子之间存在关联。结论:PAEs暴露可影响卵泡液中炎性因子水平,提示PAEs暴露可能带来卵巢微环境炎症负荷的改变。

多囊卵巢综合征患者卵泡液代谢组学的研究进展

多囊卵巢综合征(PCOS)是一种复杂的异质性内分泌疾病,育龄妇女发病率约为5%~18%,但病因和病理生理仍不清楚。PCOS是无排卵性不孕症最常见的病因,接受体外受精-胚胎移植(IVF-ET)的PCOS患者常存在卵巢过度刺激综合征发生率高、受精率低、流产率高等问题。卵泡液代谢物可为各个阶段的卵母细胞提供养分,小分子代谢物改变会严重影响卵母细胞的生长以及胚胎发育潜能。本文就PCOS患者卵泡液中的各类代谢物进行综述,以期为研究PCOS患者卵母细胞发育潜能低下的发病机制以及寻找更有效的药物作用靶点提供有效证据。

卵泡液外泌体在卵泡细胞功能调节中的机制研究进展

卵泡液是卵泡细胞生长发育的内环境,其成分的变化与卵泡细胞的功能状态息息相关。近年来,人们发现在许多生物体液中都存在一种直径为30~150 nm的双层膜囊泡结构——外泌体(exosome),并揭示了它在众多生理病理过程中的媒介作用。研究者也在卵泡液中鉴定出了外泌体成分,并发现它与卵泡细胞的生长发育有着密切的联系,并间接影响了卵母细胞状态,这对评估卵母细胞质量有着重要意义。

卵母细胞及早期胚胎脂代谢的研究进展

脂代谢为卵母细胞发育成熟及早期胚胎发育过程提供能量,且代谢中间产物具有多种细胞生物学功能,包括生物膜构建、细胞信号传导、类固醇前体产生和代谢。卵母细胞还可以通过卵丘细胞从卵泡液获得脂质及其代谢物,尤其是胆固醇、高密度脂蛋白、甘油三酯、游离脂肪酸、载脂蛋白A1、肉碱。多囊卵巢综合征(PCOS)、肥胖、高龄、代谢紊乱、卵巢低反应(POR)等人群中卵母细胞脂代谢的异常与卵母细胞及其胚胎质量差密切相关。本文将综述卵母细胞减数分裂及早期胚胎发育过程中的脂代谢,为不孕症女性和高龄女性的个体化辅助生殖治疗提供理论支持,也有益于创新与改进未成熟卵母细胞体外培养液。

补肾调经方对输卵管性不孕症患者体外受精—胚胎移植超排卵周期GDF-9的影响

目的研究补肾调经方对提高体外受精—胚胎移植(in vitrofertilization-embryo transfer,IVF-ET)超排卵周期所获卵和胚胎质量的作用及其机制。方法将58例因输卵管性不孕行IVF-ET患者随机分为中药+控制性超排卵组(治疗组,30例)和单纯控制性超排卵组(对照组,28例)。应用Western blot法测定取卵日成熟卵泡卵泡液中生长分化因子-9(growth differentiation factor-9,GDF-9)的含量;用RT-PCR法检测颗粒细胞中GDF-9的表达;并比较两组的促性腺激素(gonadotropin,Gn)用药量、获卵数、受精率、卵裂率、优质胚胎率及妊娠率等。结果治疗组卵泡液中GDF-9水平及颗粒细胞中GDF-9的表达均显著高于对照组(P<0.05);治疗组的获卵数、受精率、优质胚胎率及妊娠率均显著高于对照组(P<0.05);Gn用量及卵裂率两组比较差异无统计学意义。结论补肾调经方可以提高IVF-ET妊娠率,其作用机制可能与调控卵泡液和颗粒细胞GDF-9水平有关。

在成熟过程中添加牛血清和猪卵泡液对猪卵母细胞核成熟及体外受精后早期胚胎发育的影响

研究目的在于探讨在成熟过程中添加牛血清和猪卵泡液对猪卵母细胞核成熟、卵丘细胞扩散及体外受精后早期胚胎发育的影响。卵母细胞·卵丘细胞复合体在含FSH和LH的以下处理组的成熟液中成熟培养 2 3～ 2 4h :(1)对照组-改良TCM - 199+0 .1%PVA ;(2 )试验组 1-改良TCM - 199+10 %新生牛血清 ;(3)试验组 2 -改良TCM - 199+10 %猪卵泡液 ,再移至无FSH和LH的不同处理组的成熟液中成熟培养 2 3～ 34h。试验 1中 ,卵母细胞在 4 6～ 4 8h成熟培养后 ,观察卵丘细胞扩散情况 ,并对卵母细胞进行固定和染色 ,鉴定卵母细胞减数分裂情况 :试验 2中 ,对在不同处理组的成熟液中成熟培养 4 6～ 4 8h的卵母细胞进行体外受精 ,再培养 8d。受精后第 2天检查分裂率、第 6天检查桑椹胚 /囊胚率、第 8天检查囊胚率。 4 6～ 4 8h成熟培养后试验组 1和试验组 2的大部分卵母细胞 -卵丘细胞复合体的卵丘细胞完全扩散 ,而对照组的卵丘细胞只有 5 0 %扩散。试验组 1和试验组 2的卵母细胞核成熟率分别为 39.9% (77/ 193)和 4 4 .3% (93/ 2 10 ) ,与对照组的卵母细胞核成熟率 4 8.1% (99/ 2 0 6 )相比没有显著差异 (P <0 .0 5 )。卵母细胞分裂率试验组 1(5 0 .0± 1.8) %和试验组 2 (49.9± 2 .6 ) %与对照组的卵母细胞分裂率 (49.0±

血清及卵泡液内脂素水平与多囊卵巢综合征的关系

【目的】探讨多囊卵巢综合征(PCOS)患者血清内脂素(S visfatin)、卵泡液内脂素(FF visfatin)水平及其与PCOS的关系。【方法】选择同期因PCOS、输卵管等因素导致不孕行手术治疗的育龄女性,PCOS组20例,对照组20例。两组患者均于卵泡早期抽取静脉血检测性激素、血糖指标,测量身高、体质量、腰围、臀围以计算体质量指数BMI、腰臀比WHR;留取血清、卵泡液检测visfatin水平。【结果】(1)PCOS组S visfatin(20.03±3.07)ng/mL、FF visfatin(19.17±4.91)ng/mL水平分别高于对照组S visfatin(14.47±3.81)ng/mL、FF vifatin(13.20±4.12)ng/mL水平,差异均有统计学意义(P﹤0.001);(2)PCOS组S visfatin、FF vifatin水平呈正相关(r=0.67,P=0.004);对照组S visfatin、FF vifatin水平呈正相关(r=0.87,P<0.001);(3)研究对象总体多因素线性逐步回归分析结果显示,胰岛素抵抗指数(HOMA-IR)、WHR、LH/FSH可以解释S visfatin水平的80%;血清visfatin可以解释卵泡液visfatin水平的85%。【结论】PCOS患者存在高内脂素血症,其S visfatin、FF visfatin水平升高,且两者呈正相关;FF visfatin可能主要受到S visfatin的影响;HOMA-IR、WHR、LH/FSH与S visfatin呈正相关,提示visfatin可能参与了PCOS的发病机制。

不育妇女卵泡液血管内皮生长因子水平与妊娠结局相关性

目的 探讨卵泡液血管内皮生长因子 (VEGF)与妊娠结局的相关性。 方法 对 50例首次接受体外受精治疗的不育妇女 ,按其定量酶联免疫法测定卵泡液VEGF水平 ,编制频数分布表 ,分为 4组 ,记录患者卵母细胞质量、受精率、卵裂率及优质胚胎的百分比。 结果 (1 )卵泡液VEGF水平 450～ 50 9、51 0～ 70 9、760～ 1 0 0 9、1 0 1 0～ng/L时的受精率分别为 (49± 1 8) %、(71± 1 9) %、(52± 1 5) %、(3 4± 1 2 ) % ;卵裂率分别为 (68± 1 6) %、(84± 1 1 ) %、(71± 2 6) %、(71± 2 4) % ;优质胚胎比例分别为 (2 3±1 1 ) %、(74± 2 1 ) %、(50± 1 2 ) %、(2 2± 1 4 ) % ;妊娠率分别为 0 %、55%、45%、0 %。 (2 )相关分析结果 ,卵泡液VEGF水平越高卵细胞越成熟 ,但过高导致卵细胞退化 (r=0 .58,P<0 .0 5)。 结论 卵泡液VEGF水平过低或过高会导致卵母细胞质量、受精率、卵裂率及优质胚胎比例下降 ,导致临床妊娠率降低 ,卵泡液VEGF水平在 51 0～ 760ng/L 。

卵泡液瘦素、睾酮与卵细胞受精率、受精卵分裂率的关系

目的 探讨卵泡液瘦素、睾酮对卵细胞受精率、受精卵分裂率的影响 ,寻求预测卵细胞质量的指标 ,以提高试管婴儿的成功率。方法 留取在本院进行试管婴儿治疗的 38个促排卵周期穿卵时的卵泡液 ,用ELISA法、RIA法分别测定卵泡液瘦素、睾酮水平 ,根据测定结果分为高瘦素组与低瘦素组、高睾酮组与低睾酮组 ,观察并记录不同组别之间卵细胞受精及受精卵分裂情况。结果 卵泡液瘦素与睾酮呈正相关 (r =0 .6 84 ,P <0 .0 5 ) ,低瘦素组受精率、受精卵分裂率高于高瘦素组 (P <0 .0 5 ) ,低睾酮组受精率、受精卵分裂率高于高睾酮组 (P <0 .0 5 )。结论 卵泡液瘦素、睾酮对卵细胞受精率及受精卵分裂率有影响 ,可作为卵细胞质量的预测指标。

卵泡液中雌孕激素水平及卵泡大小与卵母细胞成熟度的关系

目的:探讨卵胞浆内单精子显微注射(ICSI)周期取卵日卵泡大小、卵泡液中雌孕激素水平和卵母细胞成熟度的相关性。方法:选择因男方因素在本中心接受ICSI治疗的51例不孕患者作为研究对象,收集取卵日卵泡液共140例,取卵前B超测量卵泡平均直径,采用电化学发光法(ECLI)检测卵泡液中雌二醇(E2)、孕酮(P)水平,分析取卵日卵泡大小、卵母细胞成熟度及卵泡液中雌孕激素水平三者间的相互关系。结果:卵泡平均直径与卵泡液E2水平呈正相关(r=0.724,P<0.05),与P水平亦呈正相关(r=0.798,P<0.05);按卵母细胞成熟度分为MⅡ组、MⅠ组、GV组和退化组,4组卵泡液中P水平无统计学差异(P>0.05),但退化组卵泡液中E2水平显著低于MⅡ组(P<0.05);所有样本按P/E2值分为1(<15)、2(15～25)、3(>25)组,2组卵母细胞成熟率最高,与1、3组的差异均有统计学意义(P<0.017),1组与3组的卵母细胞成熟率无统计学差异(P>0.017)。根据卵泡平均直径分组,直径>1.6cm为大卵泡组,1.6～1.2cm为中卵泡组,<1.2cm为小卵泡组,大卵泡组卵母细胞成熟率最高,与中、小卵泡组的差异有统计学意义(P<0.017),中卵泡组卵母细胞成熟率显著高于小卵泡组(P<0.017)。结论:卵泡大小与卵泡液雌孕激素水平呈正相关。卵泡液中P/E2在特定范围内时卵母细胞成熟率较高,其水平过高或过低均影响卵母细胞成熟;大卵泡组与中、小卵泡组在卵母细胞成熟率方面有显著统计学差异。

猪卵泡液和促性腺激素处理时间对猪卵母细胞体外成熟的影响

研究猪卵泡液(pFF)的浓度和促性腺激素(FSH和LH)处理时间对猪卵泡卵母细胞体外成熟的影响.结果表明,在猪卵丘细胞-卵母细胞复合体体外成熟培养46～48 h中的后23～24 h去除促性腺激素可有利于卵丘细胞的扩散,但对卵细胞的核成熟无显著影响(P>0.05);添加适量(10%)的pFF对猪卵母细胞体外成熟有一定的促进作用,但添加浓度太高则相对抑制卵子核成熟进程.