Evaluation of the Sperm Motility Analyzer System (SMAS) for the Assessment of Sperm Quality in Infertile Men

Eighty-one fresh semen samples were analyzed to compare the sperm parameters obtained using the new Sperm Motility Analysis System (SMAS; version 1.0, Kaga Electronics, Tokyo, Japan) with the CellSoft^TM Series 3000 (CRYO Resources, New York, USA) computer-assisted semen analysis (CASA) system and conventional manual semen analysis, based on WHO guidelines.. Significant correlations of sperm concentration (p<0.0001) and sperm motility (p<0.0001) were observed between SMAS and manual semen analysis estimates. There were also significant correlations of sperm concentration (p=0.0003) and sperm motility (p<0.0001) between SMAS and CellSoft estimates. Significant correlations for motility-related parameters were demonstrated in sperm velocity (p<0.0001), and linearity (linear velocity (VSL) divided by curvilinear velocity (VCL)×100) (p<0.0001), amplitude of lateral head displacement (ALH) (p<0.0001), and beat/cross frequency (BCF) (p=0.0127), between SMAS and CellSoft estimates. In this study, we showed the usefulness of the new SMAS, which has high reliability in estimating sperm concentration, sperm motility, velocity and linearity compared with CellSoft. SMAS can be a promising alternative, providing cost-effective semen analysis with the utility of the CASA system.     

Effect of age and abstinence on semen quality: A retrospective study in a teaching hospital

ObjectiveTo elucidate the effect of age and sexual abstinence on semen quality (semen volume, total count, progressive motility, vitality and morphology).MethodsA total of 730 semen samples were analyzed. Subjects were grouped according to the age (20-29, 30–34, 35–39 and 40–50) and abstinence (2–3, 4–5 and 6–7). Semen parameters were evaluated following WHO standard criteria.ResultsAnalysis of 730 semen samples showed negative correlation of progressive motility (r=-0.131, P< 0.01), vitality (r=-0.173, P< 0.01), morphology (r=-0.324, P< 0.01) with age. With increase in age percentage of progressive motility, vitality and normal morphology in mean values declined after the age group of 35–39 to 40–50 years, but no change in volume and count were observed. Increase in abstinence with individual days significantly affected semen volume (H= 20.65, P< 0.001), count (H= 36.67, P<0.01), progressive motility (H= 13.53, P<0.05) and vitality (H= 15.33, P< 0.01). But, no effect was found on sperm morphology. Mann Whitney U test confirmed the changes in semen volume, total count and vitality in paired grouping from 2–7 days (P<0.05), but changes in sperm motility were observed after 5 days of abstinence in each paired group upto 7 days (P<0.05). Mean values of semen parameters among three abstinence groups (2–3, 4–5 and 6–7 days) also showed similar result.ConclusionsIn the present study, age negatively affected progressive motility, vitality and morphology of human sperm. Semen samples showed intra varied results within WHO amended abstinence period.     

RELATIONSHIP BETWEEN SOME REPRODUCTIVE PARAMETERS AND BIOCHEMICAL PROPERTIES OF BLOOD SERUM IN RAMS

The objective of the present study was to describe the relationship between some reproductive parameters, hormonal levels, and some biochemical properties of blood serum in rams under the Afyon province conditions. The total protein and globulin were positively (P?<?0.01) correlated with sperm motility and sperm concentration in all of rams. Total lipid was negatively (P?<?0.05) correlated with sperm motility and concentration in Daglic, and it was positively (P?<?0.01) correlated with percentage of abnormal spermatozoa in Chios rams. Total lipid and cholesterol was positively (P?<?0.01) correlated with triiodothyronine in all of rams and was negatively (P?<?0.05) correlated with testosterone in Daglic rams. Percentage of abnormal spermatozoa were negatively (P?<?0.01) correlated with alanine amino transaminase (ALT) level, but were positively (P?<?0.01) associated with aspartate amino transaminase (AST) level and AST/ALT ratio in all of rams.     

USEFULNESS OF SPERM QUALITY ANALYZER-V (SQA-V) FOR THE ASSESSMENT OF SPERM QUALITY IN INFERTILE MEN

The aim of this study was to evaluate the correlation of new of Sperm Quality Analyzer (SQA-V) with the computer-assisted sperm analysis (CASA) and manual semen analysis estimates. One hundred five fresh semen samples were analyzed using SQA-V and CASA and manual semen analysis. Significant correlations of sperm concentration (p < 0.0001), sperm motility (p < 0.0001), and normal morphology (p < 0.0001) were observed between SQA-V variables and manual semen analysis estimates. There also were significant correlations of sperm concentration (p < 0.0001), sperm motility (p < 0.0001), and sperm velocity (p = 0.0235) between SQA-V variables and CASA estimates. Meanwhile, it did not correlate with amplitude of lateral head displacement, beat cross frequency, lineality assessed by CASA. The value of the sperm concentration and the sperm motility measured by SQA-V showed high correlations with the value of those measured by CASA and manual semen analysis. In addition, velocity and sperm morphology may also be evaluated to some extent using SQA-V.     

精浆IL-1β、IL-8、TNF-α含量测定对男性不育症患者的诊断价值

目的：观察男性不育症患者精浆中白细胞介素-1β（IL-1β）、白细胞介素-8（IL-8）、肿瘤坏死因子α（TNF-α）含量与精子部分功能指标关系。方法：应用放射免疫分析技术对118例男性不育症和22例正常生育者精浆中IL-1β、IL-8、TNF-α含量进行检测并分析。根据精子密度将不育症患者分为A组（精子密度≥20×10^6/ml）、B组（精子密度〈20×10^6/ml）和C组（无精子症者）3组;根据精子活力、活率将A组分别分为精子活力正常组和不良组,精子活率正常组和下降组;根据精液中白细胞（WBC）数量将不育症患者分为WBC精液组和非WBC精液组。结果：不育症组精浆IL-1β、IL-8、TNF-α含量显著高于生育组（P〈0.05或P〈0.01）;不育症组精浆中IL-1β含量在精子活力正常与不良、WBC精液组与非WBC精液组之间存在统计学差异（P〈0.05）;IL-8含量在精子活率正常与减少、WBC精液组与非WBC精液组之间有统计学差异（P〈0.05或P〈0.01）;TNF-α含量在不育症组精子活力、活率正常与不良之间均有统计学差异（P〈0.05）。结论：精浆中IL-1β、IL-8、TNF-α含量与男性生殖密切相关,其含量变化可反映生殖系统局部的免疫状态和感染情况,并影响精子的运动功能,含量测定可为不育症诊治提供参考。     

Lifestyle and demographic factors associated with human semen quality and sperm function

In this study, we sought to investigate the effect of lifestyle and demographic factors on classic and functional semen parameters. Three hundred and twenty-eight subjects who underwent semen analysis were recruited. Routine SA, sperm vitality, acrosome reaction (AR) assay and sperm DNA fragmentation index (DFI) were analyzed. Demographic and lifestyle information, including (1) BMI, (2) current smoking and alcohol drinking frequency, (3) sleep habits, (4) daily fluid intake, (5) weekly meat intake, (6) sports frequency, (7) trouser cell phone use, (8) age, and (9) abstinence time, were collected. Generalized additive models were used to analyze the possible non-linear association. The results showed that total sperm count (TSC) was significantly associated with age (P = 0.001), abstinence time (P = 0.001) and daily coffee intake (P = 0.044). Semen volume was significantly associated with age (P < 0.001) and daily coffee intake (P < 0.001). Sperm concentration was significantly associated with abstinence time (P = 0.011) and average sleep duration (P = 0.010). Sperm motility was significantly associated with age (P = 0.002) and daily juice intake (P = 0.001). Total motile sperm count was significantly associated with age (P = 0.003) and abstinence time (P = 0.009). DFI was significantly associated with age (P = 0.002), irregular sleeping habit (P = 0.008) and abstinence time (P = 0.032). The percentage of AR sperm was significantly associated with daily juice intake (P = 0.013). In conclusion, DFI and TSC were the most sensitive semen parameters for demographic and lifestyle features, whereas age had more influence on semen parameters than other demographic and lifestyle features.

Abbreviations: BMI: body mass index; SA: semen analysis; AR: acrosome reaction; DFI: DNA fragmentation index; GAM: generalized additive model; TSC: total sperm count; TMC: total motile sperm count; IUI: intrauterine insemination; SCSA: sperm chromatin structure assay; SD: standard deviation; IQR: interquartile range; CBAVD: congenital bilateral absence of vas deferens; NEQAS: national external quality assessment service; HTF: human tubal fluid; HSA: human serum albumin.     

EFFECTS OF SEMEN CHARACTERISTICS ON IUI COMBINED WITH MILD OVARIAN STIMULATION

To determine the influence of sperm parameters inseminated on the outcome of intrauterine insemination (IUI) in patients undergoing ovarian stimulation with clomiphen citrat (CC) or human menopausal gonadotropin (HMG) therapy, a retrospective review was performed for 2 years on data from the IUI program. 190 couples underwent a total of 268 IUI cycles in which CC or HMG was used for ovulation induction. The initial sperm concentration (mil/ml), motility (percent), preprocessing total motile sperm (TMS) count (million), fast motile sperm (percent) and postprocessing sperm concentration (mil/ml), motility (percent), TMS count, fast motile sperm (percent), sperm morphology, hypoosmotic swelling (HOS) scores, semen leuocytes, and bacteria were analyzed. 268 inseminations were followed by a pregnancy rate of 12% and couple pregnancy rate of 17%. On multivariable logistic regression analysis, total motile sperm (TMS) count, percent motility, and percent of fast motile sperm were independent prognostic factors of fertility. The impact of the preprocessing and postprocessing sperm parameters on pregnancy outcome after IUI was evaluated. There was a trend toward an increasing percent of conception with increasing TMS count, motility, and percent of fast motile sperm. The TMS count, motility and percent of fast motile sperm independently predict success with IUI. Patients with original sperm motility ≥30% had a higher cumulative pregnancy rate (74%) than patient with motility <30% (p < 0.005). Pregnancy rate increased 4 times with motility of ≥30%.     

汞对男工生殖功能影响的研究

本文对某荧光灯厂３７名男工的生殖功能调查研究的结果表明：工人在作业环境汞浓度超标情况下作业，导致休内汞负荷水平的增高。血汞和精汞含量（分别为０．０５８１ｍｇ／Ｌ和０．０２７０ｍｇ／Ｌ）均比对照组（分别为０．０１０９ｍｇ／Ｌ和０．１３９ｍｇ／Ｌ增高，Ｐ＜０．０１。工人的生殖功能也受到一定的影响，表现为精液量减少，液化时间延长，精子的密度减小、一次射精子数减少、活精率下降，精子畸形率增高。同时，还观察     

Relationship Between Hypoosmotic Swelling Test,Semen Analysis,and Zona-Free Hamster Ovum Test

The hypoosmotic swelling test is a simple test for measuring the functional competence of the human sperm membrane. Fifty-four patients with idiopathic infertility were assessed by hypoosmotic swelling test and the results were compared with those of routine semen analysis and zona-free hamster ovum human sperm penetration test (ZSPT). Semen samples with abnormal semen parameters had lower percentage of swollen sperm in comparison with those with normal semen parameters. A positive correlation was observed between sperm concentration and sperm swelling (r -. 50, p <. 05). A strong positive correlation was observed between the percentage of sperm motility and the percentage of swollen sperm (r - 0.60, p <. 01), and between motile sperm concentration and sperm swelling (r -. 62, p <. 01). On the other hand, sperm swelling correlated only weakly with the percentage of sperm penetration. The results indicate that the hypoosmotic swelling test appears to evaluate different functional qualities of sperm than ZSPT.     

Depressed Semen Quality: A Study Over Two Decades

One hundred-eighty-five consecutive spermograms from men of infertile couples in 1980—1981 were compared with as many spermiograms of age-matched controls from 1960—1961. The semen parameters analyzed were: volume, sperm density, and sperm morphology. The following significant changes were noted over the time period: the mean seminal volume decreased from 3.79 ml to 3.42 ml (p < 0.05), the mean sperm count decreased from 125.4 mill/ml to 78.0 mill/ml (p < 0.001) and the proportion of double sperm heads increased from 0.52% to 1.51% (p < 0.001). Further analysis showed even more pronounced changes in these parameters for men living in the urban area compared those from the surrounding rural areas.     

藏族大骨节病血清生化指标检测及相关性分析

[目的]探讨血清钙、磷、镁、碱性磷酸酶、乳酸脱氢酶、肌酐等生化指标与藏族大骨节病患者的相关性。[方法]收集四川省阿坝州若尔盖地区藏族大骨节病患者295例(其中I度68例,II度89例,III度138例),同地区藏族正常对照290例,测定患者及对照的13项血清生化指标:钙(Ca)、磷(PHOS)、镁(Mg)、碱性磷酸酶(ALP)、乳酸脱氢酶(LDH)、α羟丁酸脱氢酶(HBDH)、肌酸激酶(CK)、谷丙转氨酶(ALT)、谷草转氨酶(AST)、谷氨酰转移酶(GGT)、总蛋白(TP)、白蛋白(ALB)、肌酐(Cre)。[结果]藏族大骨节患者血清Mg、ALP、LDH、HBDH水平均显著高于对照组(P﹤0.05);患者血清CK、DALT、AST、GGT、Cre水平则显著低于对照组(P﹤0.05);而患者组和对照组血清Ca、PHOS、TP、ALB水平没有明显差异(P﹥0.05)。同时,患者血清ALP、LDH、HBDH、ALT和AST水平还与病情严重程度存在明显的相关性(P﹤0.05)。[结论]藏族大骨节患者血清中Mg、ALP、LDH、HBDH水平显著升高,CK、ALT、AST、GGT、Cre水平则明显降低;且ALP、LDH、HBDH、ALT和AST水平与大骨节病的严重程度相关。因此,这些生化指标的检测对于大骨节患者的早期诊断和预防以及病程进展的监测具有非常重要的意义。     

广西地区正常生育力男性精液质量的调查分析

目的了解广西地区正常生育力男性的精液质量状况。方法选择广西地区有生育力的男性进行精液检测,对精液的各主要参数进行分析,比较壮族和汉族不同居住地间的差别。结果 687例正常生育力男性的精子密度、存活率、精液量和pH值与世界卫生组织(World Health Organization,WHO)——第4版的正常参考值符合率较高,液化时间、正常精子形态率和活动力的符合率偏低。其中有321例(46.72%)达到世界卫生组织的精液分析正常值标准。汉族正常精子形态率则低于壮族,差异具有统计学意义(P<0.05)。居住在农村的男性和城市的相比较,除pH值无明显差异(P>0.05)外,其他参数均明显优于城市,差异有统计学意义(P<0.05)。结论广西地区正常生育力男性的精液参数与国内其他调查分析结果相似;广西汉族、壮族间精液质量差别不大,农村男性的精液质量优于城市男性。     

男性不育患者精浆锌含量与精液主要参数相关性研究

目的:探讨不育男性精浆的锌含量与精液质量的关系。方法:回顾性分析2011年8月～2012年1月在广西壮族自治区妇幼保健院生殖中心就诊的343例男性不育患者的相关资料,依据精浆锌含量分为正常A组(n=274例)和异常B组(n=69例),比较两组间精液参数的差异;同时根据精液黏稠度分为黏稠C组(n=54例)与非黏稠D组(n=289例),比较两组间精浆锌含量及其他精液参数的差异。结果:A组与B组患者年龄比较差异无统计学意义(P>0.05)。A组的精液量、每次射精精子总数、前向运动精子总数显著高于B组,而黏稠精液的比例明显低于B组,差异均有统计学意义(P<0.05)。其他精液各指标比较差异无统计学意义(P>0.05);C组与D组精液圆细胞浓度、精液量、精子浓度、精子总数比较差异无统计学意义(P>0.05);D组的前向运动精子百分率、前向运动精子总数、活动率、精浆锌明显高于C组,差异有统计学意义(P<0.05)。精浆锌含量与精液量、每次射精精子总数、前向运动精子总数显著正相关,与其他参数无显著相关性。结论:精浆锌含量直接影响精液量、精子总数、前向运动精子总数和精液黏稠度,精浆锌含量是男性生殖力的重要评估指标。     

REVISION OF HYPO-OSMOTIC SWELLING (HOS) TEST WITH A PROPOSITION OF CLASSIFIED GRADING SYSTEM: iTS COMPARISONS WITH FOUR DIFFERENT TYPES OF HUMAN SPERM SEPARATION TECHNIQUE

In this study, we arbitrarily classified the morphological changes of sperm under hypo-osmotic condition and compared the results with four different sperm separation techniques. The morphology of classification ranged from a good swelling (SG 3 > SG 2 > SG 1), to non-swelling but reactive (SG 0-R), and completely non-swelling (SG 0). Thirty fresh semen from patients were divided into 4 groups and each processed by washing, swim up, 2-layer column and real time micro-separation system. The prevalent patterns of the swollen sperm in sequence after treatment was SG 0 > SG 1 > SG 3 > SG2 > SG 0-R in fresh semen, and the proportion of SG 0 was almost half of the total % HOS test results. However, SG 3 became the most common swollen form with a significant increase in number with any method of sperm preparation after treatment. The real time technique yielded the highest % rate of SG 3 type of swollen spermatozoa and was the richest in concentration (53±3.9%, P < 0.05) as compared with that of swim up (26±4.6%), 2-layer (20±4.4%), sperm washing (23±3.9%), and fresh semen (17± 2.8%), respectively. By contrast, 2-layer collected more number of SG0-R (5.3±1.2%, P < 0.05) pattern of spermatozoa when compared to real time and swim up. A positive correlation (r = 0.81, P < 0.002) was shown between the % total HOS spermatozoa and total motility of fresh semen but not with morphology. Collectively, an abnormally functional sperm may exist in almost half of a total sperm count from men. It would appear that a better potential fertilization capacity may reside in the more swollen sperm from HOS test than the less swollen sperm and that may be more related with the motility rather than the morphology. The HOS classification and grading system appears valuable in further evaluating sperm quality.     

精液叶酸、维生素B_(12)、活性氧水平与精子质量关系研究

目的 :　检测人精液叶酸、维生素 B12 ( VB12 ) ,及活性氧 ( ROS)的含量 ,探讨三者与精子质量的关系。方法 :　收集经证实配偶已怀孕的新加坡籍健康成年男性 1 76名的精液 ,根据WHO推荐方法检测精子质量各项指标 ,并测定精液叶酸和 VB12 含量及 ROS水平。结果 :　平均精液量、精子浓度和其活力都在正常范围内。而精子存活率 ( 73.0 6% )略低于 WHO标准 (≥ 75% ) ,形态异常的精子 ( 77.0 6% )高于 WHO标准 ( 70 % )。精液的叶酸含量与 ROS水平呈显著负相关 ( r=- 0 .2 5,P=0 .0 0 3) ;VB12 与 ROS呈负相关 ( r=- 0 .2 5,P=0 .0 0 2 ) ,与精子形态异常也呈负相关( r=- 0 .1 5,P=0 .0 4 8) ,但与精子浓度呈正相关 ( r=0 .31 ,P<0 .0 0 1 )。ROS与精子形态异常呈正相关 ( r=0 .2 5,P=0 .0 0 2 ) ,与精子活力也呈正相关 ( r=0 .1 9,P=0 .0 1 9)。结论 :　 VB12 对精子生成和维持精子正常功能是必需的 ,ROS水平与精子功能缺陷有关 ,VB12 和叶酸可能通过降低 ROS以维持精子的正常功能。     

精索静脉曲张不育患者8-羟基脱氧鸟苷水平的检测分析

目的:检测人血清及精浆中8-羟基脱氧鸟苷(8-OHdG)水平,探讨男性精索静脉曲张(VC)患者体内氧化损伤情况。方法:对41例VC不育患者、33例正常生育者进行精液分析,用8-OHdG酶联免疫试剂盒检测两组对象血清及精浆中8-OHdG水平,采用Wilcoxon两样本比较法对数据进行统计分析。结果:正常生育组的精子浓度、前向活动率、存活率均高于VC不育组(P<0.05),血清8-OHdG水平(中位数34.83ng/ml)低于VC组(中位数76.87ng/ml,P<0.05),精浆8-OHdG水平(中位数18.51ng/ml)低于VC组(中位数22.19ng/ml,P<0.05)。血清中8-OHdG水平高于精浆(P<0.05)。血清8-OHdG水平与精子存活率、前向活动率呈负相关(γ=-0.293,P<0.05;γ=-0.243,P<0.05);精浆8-OHdG水平与精子存活率、前向活动率呈负相关(γ=-0.327,P<0.05;γ=-0.275,P<0.05);血清及精浆中8-OHdG水平与精子浓度、正常形态率不相关。结论:VC患者血清和精浆中8-OHdG水平高于正常生育组,表明VC患者可能存在DNA氧化损伤,导致精子活力下降。     

三氯乙烯药疹样皮炎患者肝功能动态变化

目的 观察职业性三氯乙烯( trichloroethylene,TCE)药疹样皮炎患者血清肝功能指标动态变化,为TCE药疹样皮炎肝损害的治疗提供依据.方法 收集10例职业性TCE药疹样皮炎并发肝损害患者不同时间点血清,采用全自动生化分析仪测定血清总蛋白(TP)、白蛋白( ALB)、总胆红素(TBIL)、直接胆红素(DBIL)、间接胆红素(IBIL)、丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、谷氨酰转移酶(GGT)、碱性磷酸酶(ALP)、AST/ALT比值、白蛋白/球蛋白比值(A/G)等11项指标,分析各指标动态变化.结果 10例TCE药疹样皮炎患者11项肝功能指标变化范围是TP:43.2～74.2 g/L,ALB:24.6～44.6 g/L,A/G:0.77～2.10,TBIL:3.7～268.2 μmol/L,DBIL:1.0～166.0 μmol/L,IBIL:2.4～167.5 μmol/L,ALT:11～5985 U/L,AST:14～5586 U/L,GGT:15～1500 U/L,ALP:35～309 U/L,S/L:0.07～1.94.TBIL、DBIL、ALT、AST、GGT、ALP浓度明显升高,尤以ALT、AST、GGT变化最明显;ALT最高达5985U/L,AST最高达5586 U/L,GGT最高达1500 U/L.TP、ALB、S/L明显降低,TP最低降到43.2g/L,S/L最低至0.07.A/G基本保持不变,IBIL变化不规律.结论 TCE药疹样皮炎患者早期肝损害严重,病情易反复发作.     

解脲支原体感染对男性精液常规主要参数及精子功能的影响

目的研究解脲支原体（UU）感染对男性精液常规主要参数及精子功能的影响。方法以精液精子密度、精子活动率、液化时间、精子形态及是否存在精子膜表面IgG抗体为指标，比较318例UU阳性患者和265例UU阴性患者及229例UU阳性经药物治疗后转为UU阴性的患者的精液质量变化和恢复情况，分析解脲支原体感染对男性精液常规主要参数及精子功能的影响。结果UU阳性组与UU阴性组相比，精液精子密度、精子活动率、液化时间、精子形态及是否存在精子膜表面耳；G抗体差异有统计学意义（P〈001）；经药物治疗恢复为UU阴性后1年内，精子密度、活动率及精子形态恢复较显著（P〈005），而液化时间和精子膜表面IgG抗体无明显恢复（P〉005）。结论UU感染可以明显降低精子密度和精子活动率，同时增加液化时间、精子形态比率及精子膜表面IgG抗体阳性比率，导致男性精子功能降低。     

精液中硒含量与精子质量和精子DNA 氧化损伤的关系

目的　探讨血清和精液中硒浓度与精子质量和精子DNA氧化损伤的关系。方法　用原子吸收光谱检测血清和精液中硒浓度 ,按WHO规范方法检测精液量、精子数、每次射出精子总数、活力和活动精子百分率及精子畸形率 ,用高压液相色谱 光电检测系统和高压液相色谱 紫外线检测器同时检测人精子DNA 8 羟基脱氧核糖鸟苷 (8 OHdG)和脱氧核糖鸟苷 (dG)水平。结果　已孕组精液硒平均浓度 (0 74μmol/L)明显高于不孕组 (0 5 6 μmol/L) ,而两组间血清硒平均浓度差异无显著性。已孕组精液量、精子数和每次射出精子总数的平均值 (3 91ml、46 4× 10 9/L和 16 8 0× 10 6)明显高于不孕组 (2 79ml、36 5× 10 9/L和 10 2 0× 10 6) ,两组间精子活力、活动精子百分率和精子畸形率的平均值差异无显著性。精液硒浓度与精子数、每次射出精子总数、精子活力、活动精子百分率之间呈明显的正相关 ,而血清硒浓度与精子质量均无明显相关关系。精子DNA 8 OHdG水平与精液硒浓度呈明显负相关 ,而与血清硒浓度无明显相关关系。结论　精液硒浓度与人类精子质量和精子DNA 8 OHdG有关 ,血清硒浓度不影响精子质量和精子DNA氧化损伤程度     

Activity of antioxidative enzymes in fresh and frozen thawed buffalo (Bubalus bubalis) spermatozoa in relation to lipid peroxidation and semen quality

ObjectiveTo investigate the activity of antioxidative enzymes in fresh and frozen thawed spermatozoa in relation to lipid peroxidation and semen quality in buffalo (Bubalus bubalis) bulls.MethodsForty two semen ejaculates from seven buffalo bulls were collected by artificial vagina method and were used for the study. Sperm motility, livability, plasma membrane and acrosomal integrity, buffalo cervical mucous penetration test were assessed in fresh and frozen thawed semen. Intracellular antioxidative enzymatic activity such as super oxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSHPx) and reduced glutathione (GSH), reactive oxygen species (ROS) and lipid peroxidation (LPO) were estimated in fresh and frozen thawed semen.ResultsA significant (P<0.01) reduction in activity of antioxidative enzymes (SOD by 47.7%, GSHPx by 62.7% and GSH by 58.6%) in frozen thawed spermatozoa as compared to fresh spermatozoa was found. Although the catalase activity was varied from 0 to 3.8 IU/10⁹ sperm in fresh semen, but after freezing and thawing this activity was not detectable. These enzyme activities had a strong positive association with sperm motility, membrane integrity and distance traveled by vanguard spermatozoa in buffalo cervical mucus and negative correlation with LPO and ROS. However, no significant correlation with acrosomal integrity was found.ConclusionIt was concluded that loss of activity of intracellular antioxidative enzymes was evident after freezing and thawing and there was a strong association between the antioxidative enzyme activities, ROS, lipid peroxidation and sperm function in buffalo semen.