血清脱氢表雄酮水平与女性性早熟关系的探讨

目的:探讨血清脱氢表雄酮与女性性早熟之间的关系.方法:60例特发性中枢性早熟(ICPP)女童,62例单纯乳房早发育(PT )女童及31例与年龄匹配的青春前期健康女童,采用ELISA法测定血清脱氢表雄酮(DHEA) 及硫酸脱氢表雄酮(DHEAS)浓度,并对ICPP儿童进行达菲林治疗前、后的对比研究,随访其子宫、卵巢、骨龄及血清DHEA、DHEAS的变化.结果:①ICPP组血清Log(D HEA)、Log(DHEAS)为(0.81±0.36)μg/L,(2.31±0.31)μg/L,PT组为(0.72 ±0.30)μg/L,(2.31±0.28)μg/L,对照组为(0.32±0.26)μg/L(2.16±0.2 7)μg/L,三组比较差异有显著性意义(P<0.05);ICPP组与PT组两组之间比较差异无显著意义(P>0.05);TannerⅢ期的DHEA、DHEAS明显高于TannerⅡ期的DHEA、DHEA S,P<0.0 5.②经双变量相关分析,Log(DHEA)与身高、骨龄、子宫容积、卵巢容积呈正相关,与Lo g(LH峰值)、Log(FSH峰值)、体质指数(BMI)无相关性; Log(DHEAS)与身高、骨龄、卵巢容积呈正相关,与Log(LH峰值)、Log(FSH峰值)、子宫容积、BMI无相关性.③达菲林治疗3个月时,血清Log(DHEA)、Log(DHEAS)较治疗前明显下降 (P<0.05).治疗12个月时,血清Log(DHEA)、Log(DHEAS)与治疗前比较,差异无显著意义(P>0. 05),但子宫容积、卵巢容积、骨龄与年龄的比值治疗前、后比较差异有显著意义(P 均<0.05).结论:①性早熟女童血清DHEA和DHEAS水平增高,并随着Tanne r期的进展而升高;②血清DHEA和DHEAS水平随下丘脑-垂体-性腺轴的抑制,其浓度会有暂时性下降;③血清DHEA与性早熟女童生长加速、骨龄进展有关.

Relationship between serum dehydroepiandrosterone levels and female pre cocious puberty

OBJECTIVE: To investigate the relationship of serum dehydroepiandrosterone (DHEA) levels and female precocious puberty. METHODS: The serum levels of DHEA and dehydroepiandrosterone sulfate (DHEAS) were measured by ELISA in 60 idiopathic central precocious puberty (ICPP) girls, 62 premature thelarche (PT) girls and 31 age-matched health prepuberty girls. Bone age,volume of uterus and ovary, DHEA and DHEAS were re-measured in 3, 12 months after treatment with Diphereline in ICPP girls. RESULT: (1) The Log(DHEA) and Log(DHEAS) were (0.81 +/-0.36)microg/L and (2.31 +/-0.31)microg/L in ICPP group, (0.72 +/-0.30)microg/L and (2.31 +/-0.28)mg/L in PT group, and (0.32 +/-0.26)microg/L and (2.16+/-0.27)microg/L in controls (P <0.05). However, no significant differences were found between ICPP and PT group (P >0.05). Moreover, the serum levels of DHEA and DHEAS in precocious puberty girls with Tanner III stage were significant higher than those with Tanner II stage (P <0.05). (2) With bivariate correlation analysis, Log(DHEA) was positively correlated with height, bone age, volume of uterus and ovary (r=0.429, 0.339, 0.217, 0.282; all P<0.05), while no significant correlation with Log(LH peak), Log(FSH peak) and BMI (r=0.135, -0.165, 0.059). Log(DHEAS) was positively correlated with height,bone age and volume of ovary (r=0.319, 0.210, 0.181; P <0.05), while no correlated with Log(LH peak), Log(FSH peak), volume of uterus and BMI (r=0.012, -0.173, 0.146 and 0.081 respectively). (3) Serum Log (DHEA) and Log(DHEAS) of 32 ICPP were decreased from (0.83 +/-0.35) microg/L and (2.27 +/-0.30)microg/L to (0.68 +/-0.44)microg/L and (2.11 +/-0.43)microg/L (P<0.05) 3 months after treatment. The serum Log(DHEA) and Log(DHEAS) in 12 months after treatment were (0.78 +/-0.30)microg/L and (2.40+/-0.34)microg/L, which was not significantly different with that before treatment (P>0.05). However, the volume of uterus and ovary, bone age/age in 12 months after treatment were significantly different with those before treatment (2.82 +/-1.52 compared with 1.09 +/-0.50 ml, 3.15 +/-1.13 compared with 1.18 +/-0.42 ml, 1.43 +/-0.23 compared with 1.25 +/-0.12, all P<0.05). CONCLUSION: (1) The serum levels of DHEA and DHEAS are increased in precocious puberty girls with the development of Tanner stage. (2) Serum levels of DHEA and DHEAS are declined transiently when the hypothalamic-pituitary-gonadal axis is inhibited. (3) Serum DHEA is associated with the acceleration of growth and bone age in precocious puberty girls.