精子DNA碎片指数阈值与体外受精-胚胎移植结局的相关性研究

目的研究不同的精子DNA碎片率(SDF)阈值水平与IVF-ET结局的关系。方法对纳入病例的临床资料进行回顾性分析,并将10%、20%和30%分别作为SDF阈值进行分组,以比较不同SDF阈值水平下精液常规参数、顶体酶活力以及IVF-ET生殖结局的差异。结果在不同SDF阈值(10%、20%或30%)水平下,SDF高低组之间的精液常规各项参数、顶体酶活力均无统计学差异(P0.05)。SDF阈值设为10%时,SDF高低组之间的IVF-ET结局无统计学差异(P0.05);SDF阈值设为20%或30%时,高SDF组患者的优质胚胎率、临床妊娠率均低于低SDF组,差异有统计学意义(P0.05);SDF阈值设为30%时,高SDF组患者的受精率也低于低SDF组,差异有统计学意义(P0.05)。结论当精子SDF20%时,可能对患者的辅助生殖结局产生负面影响,建议给予适当的抗氧化治疗,待患者的精子SDF≤20%时,再进入IVFET助孕周期。     

精子DNA碎片指数与精液参数的相关性分析

目的:探讨精子DNA碎片指数(DFI)与精液参数的关系,并评价其在男性精子质量评估中的应用价值。方法:收集9 694例男性精液标本,采用流式细胞仪辅助的精子染色质结构分析法(SCSA)进行精子DFI和高DNA着色性(HDS)检测,根据WHO《人类精液检查与处理实验室手册》(第5版)精液参数参考值标准分为正常组和异常组,异常组再依据精子浓度、精子总活率和前向运动精子百分率异常程度分为A组:精子浓度(11.3～14.0)×10~6/ml,精子总活率30%～39%,前向运动精子百分率24%～31%;B组:精子浓度(7.5～11.2)×10~6/ml,精子总活率20%～29%,前向运动精子百分率16%～23%;C组:精子浓度(3.8～7.4)×10~6/ml,精子总活率10%～19%,前向运动精子百分率8%～15%;D组:精子浓度(0～3.7)×10~6/ml,精子总活率0～9%,前向运动精子百分率0～7%;按照不同DFI值分为15%、15%～30%和30%3组。分析DFI与精液参数的关系。结果:正常组DFI均显著低于异常组及其亚组(P均0.01);各异常亚组(A、B、C、D组)随着精子指标的降低DFI逐渐升高(P0.01)。根据DFI分组,发现DFI与年龄、禁欲时间、精液体积、精液pH、精子浓度、精子总活率、前向运动精子百分率、正常形态精子百分率以及HDS的差异均有统计学意义(P均0.01);相关性分析表明DFI与年龄、禁欲时间、精液体积和HDS存在正相关(r分别为0.15、0.10、0.05、0.15,P均0.01),而与精液pH、精子浓度、精子总活率、前向运动精子百分率和正常形态精子百分率存在负相关(r分别为-0.06、-0.27、-0.53、-0.52、-0.16,P均0.01)。多重线性回归分析表明精子总活率、精子浓度、年龄、禁欲时间和精液pH是与DFI相关的5个重要相关变量,标准化回归系数分别为-0.47、-0.19、0.12、0.07、-0.04,P均0.01。结论:DFI与精液参数存在中等相关性,二者可协同评估男性精子质量。     

精子DNA碎片率与男性不育症患者的年龄、精液分析参数相关性研究

目的 分析男性不育症患者精子DNA碎片率(DFI)与年龄、精液分析相关参数的相关性。方法 回顾性分析2021年11月至2022年6月至河南中医药大学第一附属医院男科门诊就诊的153例男性不育症患者的临床资料,根据患者精液常规检测结果分为两组：前向运动(PR)精子率为0.98%～32.00%或精子浓度<40×10⁶/ml,其余精液参数指标正常者为少弱精子症组(n=74),精液各项参数指标均正常的为精液参数正常组(n=79);同时,根据不同的DFI值分成3个亚组：DFI≥30%组、15%相似文献   

精子DNA碎片指数与IVF/ICSI结局的相关性

目的分析精子DNA碎片指数(DFI)与IVF/ICSI治疗结局的相关性,探讨精子DNA损伤对IVF与ICSI治疗结局的影响。方法回顾性分析2017年1～12月在本院生殖中心行常规IVF治疗的134个鲜胚移植周期和行ICSI治疗的177个鲜胚移植周期。在行IVF或ICSI治疗前,男方同时行精液常规检查和DFI检测;根据DFI参考值将患者分为DFI≤30%组和DFI30%组,比较两组间的基础数据、精液常规参数、IVF或ICSI治疗后的胚胎发育与临床结局。结果在IVF周期与ICSI周期,DFI30%组的男方年龄、前向运动精子百分率和活动精子百分率均显著低于DFI≤30%组(P0.05),DFI与这3项参数呈负相关(P0.05)。在ICSI周期中,DFI30%组的精子浓度、非前向运动精子百分率和正常形态精子百分率也显著低于DFI≤30%组(P0.05),DFI与这3项参数均呈负相关(P0.05)。在IVF周期,DFI30%组的受精率与卵裂率均显著低于DFI≤30%组(P0.05),DFI与这两项参数均呈负相关(P0.05);在ICSI周期,DFI30%组的优胚率显著低于DFI≤30%组(P0.05),但DFI与优胚率无相关性(P0.05)。IVF治疗或ICSI治疗后,不同DFI水平的临床妊娠率无显著差异(P0.05);DFI30%组的流产率虽然高于DFI≤30%组,但无显著差异(P0.05)。结论 DFI与前向运动精子百分率呈显著负相关,提示精子DNA损伤可能影响精子前向运动功能;精子DNA损伤可能影响IVF与ICSI治疗的早期胚胎发育,但对IVF与ICSI治疗的临床妊娠结局的预测作用有限。     

不育男性精子密度、活动率、活力与顶体酶活性关系的研究

目的探讨不育男性精子密度、活动率、活力、与精子顶体酶活性的关系.方法采用分光光度比色法测定精子顶体酶活性,并将其与精子密度、活动率和活力进行统计分析.结果随着精子密度、活动率、活力降低,精子顶体酶活性均明显降低(各组间比较均P＜0.001).结论不育男性精子顶体酶活性降低可影响精子密度、活动率和a, b级活力精子率,精子顶体酶活性可作为男性不育精子质量检测的指标之一.     

237例意向生育二孩男性精液常规与精子DNA损伤的相关性分析

目的对40岁以上有意向生育二孩的男性精液常规参数与精子DNA损伤进行相关性分析。方法收集2015年11月至2016年9月来本中心就诊的40岁以上有二孩生育意愿的男性精液标本237例。分别利用计算机辅助方法进行精液常规分析,利用改良巴氏染色法进行精子形态学分析,通过染色质扩散法(SCD)检查精子DNA碎片率。依据年龄与精液常规主要参数进行分组,分析各组精子DNA损伤差异,探讨精液常规各参数与精子DNA损伤程度的相关性。结果 237例研究对象平均年龄为(43.7±3.4)岁,精液体积(3.2±1.5)ml,精子浓度(67.5±38.9)×106/ml,精子前向运动率(45.0±22.2)%,正常形态精子(9.6±5.5)%,精子DNA损伤程度(21.8±14.9)%;精子DNA碎片率与精子前向运动、精子正常形态成低度负相关(r=-0.333、r=-0.365),与年龄成极弱正相关(r=0.146),与精液体积、精子浓度无相关关系(r=-0.064、r=0.057)。结论精子DNA损伤随着年龄的增加而增加,与精子活力及形态成负相关,40岁以上有意向生育二孩的男性精液常规分析可与精子DNA碎片进行联合分析。     

精子DNA碎片指数与精浆生化指标及精液参数的相关性分析

<正>传统的精液参数分析包括精液体积、精子浓度、精子存活率、前向运动精子百分率(PR%)以及精子形态学分析等,这些检测结果可以为临床医生对男性不育患者提供初步的临床诊断。随着对不育症病因及机制的深入研究,精浆生化指标、精子DNA碎片指数(DNA fragmentation index,DFI)已走进临床实验室为患者病因诊断提供新依据。上述各项精液参数同时检测,可较为全面的了解患者精液状态、精子运动能力、精子形态、精子头部核内遗传物质的缺陷程度以及附属性腺分泌功能,对不育症的诊断和治疗     

抗精子抗体对精子顶体酶活性的影响

本文旨在观察抗精子抗体对精子顶体酶活性的影响。选择男性不育者５０例与正常生育者２０例，采用固相酶染色法测抗精子抗体，以固定明胶薄膜法测精子顶体酶活性。结果发现５０例不育者抗精子抗体阳性率为５２％，不育者精子顶体酶活性明显低于生育者；抗精子抗体阳性者顶体酶活性明显低于阴性者，表明抗精子抗体可降低精子顶体酶活性。     

男性不育患者精液质量与精子顶体酶活性关系分析

目的:分析男性不育患者精液参数与精子顶体酶活性变化,探讨精液质量与顶体酶活性的关系。方法:对214例男性不育患者的精液作精子顶体酶活性、弹性蛋白酶、果糖、α葡糖苷酶、锌、酸性磷酸酶、精子尾部低渗肿胀试验检测,同时精子质量检测仪作精液分析。以检出精子顶体酶活性正常的(48.2~218.7μIU/106精子)111例作为对照组,与顶体酶活性异常(<48.2μIU/106精子)的103例精液参数作对比分析。结果:两组精液参数的精子密度、精子活动率、a+b级精子百分率、精子尾部低渗肿胀试验差异均有非常显著性(P<0.001)。弹性蛋白酶差异有显著性(P<0.05)。果糖、α葡糖苷酶差异亦有显著性(P<0.05)。精液量、锌、酸性磷酸酶差异无显著性(P>0.05)。结论:精子顶体酶活性与精液质量关系密切,精子顶体酶活性是反映精液质量的一项可靠指标。     

精子DNA冷冻损伤易感性与精子活动力相关性

目的研究不同活动力精子其核DNA对冷冻损伤的易感性。方法选取来本中心行精液常规分析,精子浓度5×106/ml、精子正常形态率4%者63例为研究对象。精子冷冻前后均采用染色质扩散(SCD)实验分析核DNA完整性,分别比较高活力组(d级30%,n=28)及低活力组(d级≥30%,n=35)精子在冷冻前后DNA完整性的差异。结果精液标本(n=63)经冷冻后,精子DNA碎片指数(SDF)较冷冻前显著升高[(23.1±12.5)%vs.(19.9±11.6)%,P0.05],其中代表精子DNA完整性较好的大晕轮精子比例显著降低[(71.9±13.3)%vs.(75.8±12.2)%,P0.05],而小晕轮精子比例则显著升高[(10.2±5.7)%vs.(8.2±3.9)%,P0.05]。在低活力组,精子SDF及大晕轮、小晕轮精子比例在冷冻前后亦差异显著(P0.05);而在高活力组,冷冻后仅小晕轮精子比例较冷冻前显著升高[(8.3±3.4)%vs.(6.8±3.0)%,P0.05],SDF及大晕轮、中晕轮、无晕轮的精子比例在冷冻前后均无显著差异(P0.05)。结论相比高活力组精子,低活力组精子核DNA冷冻耐受力较差,更易受损。     

Correlation between neutral alpha-glucosidase activity and sperm DNA fragmentation

To evaluate the association between neutral α-glucosidase (NAG) activity and sperm DNA fragmentation (DFI), ejaculates from 24 men undergoing evaluation for sperm DNA damage as a part of infertility assessment were analysed. The mean ± SD and range for the semen quality of the 24 ejaculates are as follows: volume (3.1 ± 1.3, 1.8–6.0 ml); sperm concentration (45.6 ± 41.1, 1.3–151.2 × 10⁶ ml⁻¹); sperm motility (52.8 ± 28.8, 1–95%); sperm with fragmented DNA (17.6 ± 15.4, 1.7–56.0%); sperm with immature chromatin (9.6 ± 3.8, 2.5–19.1%); NAG activity (37.9 ± 18.3, 4.4–75.3 mU ml⁻¹). The only sperm parameter significantly correlated with neutral α-glucosidase is the percentage of sperm DFI [correlation coefficient ( r ) = 0.4376, P  = 0.03].     

Human sperm acrosin activity with relation to semen parameters and acrosomal ultrastructure

Summary. It was suggested that although not related to the standard semen parameters the level of the acrosin enzyme system is related to the fertility potential in men. Recently a simple clinical assay for total acrosin level was recommended for routine semen analysis. The improved clinical assay was analysed on the freshly liquified semen of 198 Astheno-teratozoospermic men and compared with the routine semen parameters including biochemical data and the ultrastructure of the acrosome. Only the sum of the per cent of live, motile, and normal-shaped spermatozoa had positive significant and reasonably high correlation with the acrosin level ( r = 0.382, P < 0.0001). Each characteristic exhibits significant but low (< 0.35) correlation. Similarly negative significant and reasonably high correlation was obtained between the acrosin level and the sum of the principle acrosomal malformations observed by TEM ( r = 0.396, P < 0.0001) while lower negative correlation was found only with agenesis or loss of the acrosome. Acrosin levels below 8.1 μIU 10⁻⁶ cells were obtained in 4 specimens with above 80% round-form associated with more than 95% of agenesis of the acrosome. The possible significance of the low correlation obtained between the acrosin levels and seminal plasma zinc levels, malformations in the acrosomal equatorial region, and the presence of white blood cells is also discussed. We concluded that the acrosin activity reflects an aspect of male fertility which is not diagnosed by the routine semen analysis or by the ultrastructure of the acrosome, and is therefore a useful diagnostic sperm parameter.     

High total acrosin activity in varicocele individuals

Varicocele is a common cause of male infertility and reports indicate that varicocelectomy has a beneficial effect on male fertility. The aims of this study were to evaluate and compare the total acrosin activity along with DNA integrity in semen samples obtained from 70 varicocele individuals with male factors infertility presenting grades II and III varicocele before and after the surgery and 30 fertile individuals without any clinical presentation of varicocele. Total acrosin activity, protamine deficiency, DNA fragmentation, and semen parameters including sperm concentration, motility and sperm morphology were assessed by spectrophotometery, CMA3 staining, terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL) assay and WHO criteria, respectively. Total acrosin activity (P = 0.03), percentage CMA3 positivity (P = 0.00) and TUNEL-positive spermatozoa (P = 0.04) were higher in the varicocele individuals before the surgery compared with the fertile individuals; yet, all the aforementioned criteria decreased significantly after surgery (P < 0.05). The results of this study reveal that DNA fragmentation and protamine deficiency, as negative parameters in fertility, improve post-surgery; however, total acrosin activity as a positive parameter in fertility is higher in the varicocele individuals compared with fertile and decreases to a value close to the fertile control post-surgery. High levels of total acrosin activity in varicocele individuals need more research in future.     

1077例男性不育患者精子顶体酶活性及其影响因素分析

本研究对１０７７ 例不育门诊病人的精子进行顶体酶活性检测,并分析了某些因素对顶体酶活性的影响。研究发现,精子顶体酶活性呈正偏态分布,６５ ．５ ％ 低于正常值（１８ μ Ｉ Ｕ／１０６ 精子） ;相关检验表明,顶体酶活性与精子活率、活力呈显著正相关,与精子畸形率和镜下精液白细胞呈显著负相关;卡方检验表明,顶体酶活性与支原体感染、精浆抗精子抗体无关;秩和检验表明,顶体酶活性降低组精液粘度高于顶体酶活性正常组（ Ｐ＜ ０ ．０００５） 。     

人精子顶体酶活性及其影响因素分析

为研究人精子顶体酶活性与男性不育的关系，分别测定门诊３５６例不育男性精液（实验组）和１８例正常生育者精液（对照组）的顶体酶活性，同时测定实验组男性的精子活力、精子活率、畸形率、镜下白细胞数、精浆抗精子抗体并进行解脲支原体培养，作相关性分析。结果：实验组和对照组顶体酶活性为１０７±９２和２９７±１４３μＩＵ／１０６精子，组间比较差异有显著性（Ｐ＜０００１），顶体酶活性与镜下白细胞数、畸形率明显负相关，与精子活率、精子活力正相关，顶体酶活性与解脲支原体感染有关，但精浆抗精子抗体的存在不影响顶体酶活性。提示顶体酶活性与精子质量有关，是影响生育的重要因素     

不育患者精浆α-1,4糖苷酶活性与精液参数的关系

目的　探讨精浆 α-1 ,4糖苷酶活性与精液参数之间的关系。　方法　分光光度比色法测定精浆 α-1 ,4糖苷酶活性及进行精液常规分析。　结果　 2 90 2例男性不育者精浆α-1 ,4糖苷酶活性异常率为 3 8.87%。该酶活性与精子密度、精子活率、a,b级精子活力和顶体酶活性呈显著正相关 ( r分别为 0 .460、0 .1 2 2、0 .0 86和 0 .2 3 0 ,P均 <0 .0 0 1 ) ,而与精液量、精液 p H、液化时间和畸形精子率无显著相关 ( P>0 .0 5)。 α-1 ,4糖苷酶活性正常组精子密度、活率、a,b级精子活力和精子顶体酶活性均明显高于 α-1 ,4糖苷酶活性异常组 ( P<0 .0 0 1 )。以常规精液分析法 ( RSA)主要参数正常与否分成的两组间α-1 ,4糖苷酶活性差异有显著性 ( P<0 .0 0 1 )。　结论　α-1 ,4糖苷酶活性对精子密度、活率、a,b级精子活力和顶体酶活性均有明显影响 ,对精液量、精液 p H、液化时间和畸形精子率无显著影响     

不明原因男性不育患者精子核DNA与形态定量研究

目的：探讨不明原因男性不育患者精子核ＤＮＡ宣及精子形态的变化情况。方法：对５０例正常生育男性和３５例不明原因不育患者精液进行精子核ＤＮＡ积分吸光度、平均灰度和精子面积、核长、核宽、周长、圆度、尾长等定量分析。结果：不育患者精子核ＤＮＡ积分吸光度明显减低（Ｐ〈０．０１）,平均灰度明显增高（Ｐ〈０．０１）,面积、核长、宽、周长、圆度、尾长与生育男性比较,无显著性差异（Ｐ〉０．０５）。结论：不明显原因男     

Evaluation of sperm DNA fragmentation index,Zinc concentration and seminal parameters from infertile men with varicocele

The aim of this study was to investigate the effect of varicocele on DNA fragmentation index (DFI), zinc concentration and seminal parameters in infertile patients. In this prospective study, 179 men with at least 1‐year history of infertility and varicocele were examined for semen quality at Hanoi Medical University Hospital (HMUH), Hanoi, Vietnam. In addition, an inverse correlation between zinc concentration and the degree of sperm DNA fragmentation in patients with clinical varicocele was found. The difference in mean values of sperm DNA fragmentation index in patients with various grades of varicoceles can be neglected, whereas most patients with varicocele of grades II and III had DFI >30%. Varicocele is associated with high levels of DNA damage in spermatozoa and reduced zinc levels that correlate with different grades of disease. Therefore, DNA fragmentation index and zinc concentration can be used as essential additional diagnostic test for patients with clinical varicocele. A study should be conducted to evaluate the benefits of zinc supplementation to improve seminal parameters in patients with varicocele.