Corrected Seminal Fructose Levels: Index of Secretory Activity of Seminal Vesicles

Seminal fructose, sperm count, and sperm motility were measured in 340 men attending an infertility clinic. Seminal fructose correlates negatively with sperm count but not with sperm motility. The best correlation between sperm count and seminal fructose was obtained using the logarithm (log) of sperm count. When seminal fructose was multiplied by the log of sperm count obtaining a value named “corrected fructose,” the correlation with sperm count disappeared, and there was positive correlation between corrected seminal fructose and sperm motility. Therefore, corrected seminal fructose level was significantly lower in asthenospermic than in normomotile subjects, irrespective of the sperm count. Corrected seminal fructose, but not seminal fructose levels, was lowered in subjects with either low levels of serum testosterone (< 3 ng/ml) or evidence of an obstructive process in the reproductive tract. In both situations sperm motility was also reduced. The corrected fructose level was not affected by the presence of varicocele, hyperprolactinemia, or hyperserotoninemia. Measurement of corrected seminal fructose rather than seminal fructose may be a useful marker of the secretory activity of the seminal vesicles.     

精索静脉曲张患者血清性激素水平与精液质量关系研究

目的:探讨精索静脉曲张导致的雄激素缺乏与精液质量关系研究。方法:门诊就诊精索静脉曲张病人(varicocele,VC)60人,根据血清睾酮(Totol Testo,TT)水平分为A组低睾酮组(≤12nmol/L)28例,B组正常睾酮组(12nmol/L)32例,无VC且睾酮正常(12nmol/L)青年志愿者30例作为对照组C组。测定血清:T、促卵泡成熟激素(FSH)、促黄体生成激素(LH),并结合性激素结合蛋白(sex hormone binding globulin,SHBG),白蛋白(albumin,ALB)。计算游离睾酮(calculated free testosterone,c FT)和生物活性睾酮(Bio-T)百分比;计算机辅助精液分析系统(CASA)检测:精子密度,活动精子、前向运动精子、快速前向运动精子以及畸形精子百分率,精浆生化检查测定精浆酸性磷酸酶ACP、果糖、锌(Zn)含量、a-糖苷酶的含量。结果:1A组与B组比较,A组与C组比较,FSH、LH明显升高,而T明显下降(P0.05),B组与C组FSH、LH、T差异无统计学意义(P0.05),但c FT百分比和Bio-T百分比差异有统计学意义(P0.05)。2A组、B组与C组比较,精子密度、活动精子、前向运动精子、快速前向运动精子百分率均有明显下降,畸形精子百分率升高(P0.05),精浆锌含量、a-糖苷酶的含量与对照组相比显著下降(P0.05)。同时A组与B组比较,差异也有显著性(P0.05)。结论:雄激素缺乏也是VC导致不育的原因之一。