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雌激素硫酸转移酶在肥大乳房乳腺组织中的表达及意义
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摘要
目的测定雌激素硫酸转移酶(estrogen sulfotransferase ,EST)在肥大乳房乳腺组织中的表达状况,以探讨其在乳房肥大发病机制中的作用和意义。
     方法采用免疫组织化学EnVision二步法,研究雌激素硫酸转移酶分别在32例肥大乳房标本和15例正常体积乳房标本乳腺组织中的表达状况。此外,还进一步研究了不同类型肥大乳房(19例腺性肥大乳房和13例脂性肥大乳房)标本乳腺组织中雌激素硫酸转移酶的表达状况。
     结果雌激素硫酸转移酶的阳性信号表现为棕黄色颗粒主要分布于乳腺导管上皮细胞的细胞浆内,而几乎不分布于脂肪细胞内。32例肥大乳房和15例正常体积乳房标本乳腺组织中的EST阳性表达率分别为34.4%(11/32)和93.3%(14/15),两组间比较差异有统计学意义(P<0.01)。EST在19例腺性肥大乳房和13例脂性肥大乳房标本乳腺组织中的阳性表达率分别为10.5%(2/19)和69.2%(9/13) ,两组间比较差异也有统计学意义(P<0.01)。
     结论乳腺组织中雌激素硫酸转移酶的表达减少或者缺失,可能参与肥大乳房的形成。而且与腺性肥大乳房形成的关系较为密切,但可能不是脂性肥大乳房形成的确切病因。雌激素硫酸转移酶在肥大乳房乳腺组织中表达的研究不仅有助于乳房肥大病因的进一步深入与确定,而且可以为肥大乳房的治疗提供新的思路。
Objective To detect the expression of estrogen sulfotransferase(EST) in the mammary gland of the hypertrophic breast ,thus its function and significance in the pathogenesis of breast hypertrophy can be investigated.
     Method The mammary gland of samples( from 32 cases hypertrophic breast and 15 cases normal voluminal breast )were examined for EST expression by EnVision two step method immunohistochemistry.With the same method,the expression of EST in the mammary gland was detected in the different types of hypertrophic breast (19 cases gland-associated hypertrophic breast and 13 cases fat-associated hypertrophic breast) tissue specimens.
     Results The positive signal of EST was displayed in the way that brown granules were mostly distributed in the cytoplasm of mammary gland duct epithelium,and were hardly distributed in the fat cell. The positive expression rate of EST was 34.4%(11/32) in the mammary gland of the 32 cases hypertrophic breast sample and 93.3%(14/15) in the mammary gland of the 15 cases normal voluminal breast sample,showing a significant difference between the two groups(P<0.01). The positive expression rate of EST was 10.5%(2/19) in the mammary gland of the 19 cases gland-associated hypertrophic breast sample and was 69.2%(9/13) in the mammary gland of the 13 cases fat-associated hypertrophic breast sample, also showing a significant difference between the two groups(P<0.01).
     Conclusions Decrease or deletion of EST in the mammary gland may be related to the development of hypertrophic breast.and it may has close connection with gland -associated hypertrophic breast,but not be the definite pathogeny of fat-associated hypertrophic breast.The research on expression of EST in the mammary gland of the hypertrophic breast,was not only contributed to determine the etiology of breast hypertrophy further,but also provided new thinking for the therapy of hypertrophic breast.
引文
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