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      絕經(jīng)后女性同型半胱氨酸、脂質(zhì)水平、CRP、NLR與骨質(zhì)減少的關(guān)系

      2016-06-08 07:24:22劉文華湯珊珊黃哲人魏雙雙張治芬陳臨節(jié)
      國際婦產(chǎn)科學(xué)雜志 2016年1期
      關(guān)鍵詞:同型半胱氨酸骨質(zhì)疏松脂質(zhì)體

      劉文華,湯珊珊,黃哲人,魏雙雙,張治芬,陳臨節(jié)

      ?

      絕經(jīng)后女性同型半胱氨酸、脂質(zhì)水平、CRP、NLR與骨質(zhì)減少的關(guān)系

      劉文華,湯珊珊,黃哲人,魏雙雙,張治芬,陳臨節(jié)

      【摘要】目的:探究絕經(jīng)后女性同型半胱氨酸(HCY)、C反應(yīng)蛋白(CRP)、中性粒細(xì)胞/淋巴細(xì)胞比值(NLR)、脂質(zhì)水平與骨質(zhì)減少的關(guān)系。方法:收集2013年1月—2014年12月于南京醫(yī)科大學(xué)附屬杭州醫(yī)院婦科門診就診的絕經(jīng)后女性患者269例,年齡45~60歲,均未應(yīng)用絕經(jīng)期激素治療。骨密度采用雙能X線吸收測定法(DXA)測量,根據(jù)測定結(jié)果將受試者分為骨質(zhì)正常組(n=128)和骨質(zhì)減少組(n=141)。HCY采用酶聯(lián)免疫吸附法測定,CRP、脂質(zhì)指標(biāo)采用化學(xué)發(fā)光免疫分析法測定。結(jié)果:骨質(zhì)減少組絕經(jīng)時(shí)間及血清低密度脂蛋白(LDL)、CRP、HCY、NLR水平高于骨質(zhì)正常組,絕經(jīng)年齡低于骨質(zhì)正常組,差異有統(tǒng)計(jì)學(xué)意義(均P<0.05)。絕經(jīng)年齡晚是骨質(zhì)減少的保護(hù)因素,絕經(jīng)時(shí)間長及血清LDL、CRP、HCY、NLR水平升高是骨質(zhì)減少的危險(xiǎn)因素,OR(95%CI)分別為0.755(0.623~0.914),1.408(1.043~1.901),1.038(1.018~1.058),1.398(1.115~1.753),3.534(2.355~5.303)和3.959(2.148~7.299),差異有統(tǒng)計(jì)學(xué)意義(均P<0.05)。結(jié)論:絕經(jīng)年齡、絕經(jīng)時(shí)間及血清LDL、CRP、HCY、NLR水平可作為絕經(jīng)后女性骨質(zhì)丟失的評(píng)價(jià)指標(biāo)。

      【關(guān)鍵詞】骨質(zhì)疏松,絕經(jīng)后;脂質(zhì)體;C反應(yīng)蛋白質(zhì);中性白細(xì)胞;淋巴細(xì)胞;同型半胱氨酸

      作者單位:310006杭州,南京醫(yī)科大學(xué)附屬杭州醫(yī)院婦產(chǎn)科

      (J Int Obstet Gynecol,2016,43:103-106)

      骨質(zhì)疏松是一種全身系統(tǒng)性骨骼疾病,以低骨量和骨小梁退化為主要特點(diǎn)。骨質(zhì)疏松的危險(xiǎn)因素有年齡、絕經(jīng)年齡、低體質(zhì)量、吸煙、飲酒及骨密度(bone mineral density)減少。Tyagi等[1]提到同型半胱氨酸(homocysteine,HCY)與骨骼疾病有關(guān),HCY增強(qiáng)破骨細(xì)胞的活性,降低成骨細(xì)胞的活性,改變細(xì)胞基質(zhì)及骨質(zhì)膠原的連接,導(dǎo)致骨密度降低。HCY可直接影響成骨細(xì)胞基質(zhì)金屬蛋白酶(MMPs),改變其細(xì)胞基質(zhì)穩(wěn)定性。Vacek等[2]指出HCY促進(jìn)氧化應(yīng)激,誘導(dǎo)成骨細(xì)胞的凋亡,導(dǎo)致骨質(zhì)的減少。慢性炎癥與全身骨量丟失、骨質(zhì)疏松、骨折風(fēng)險(xiǎn)增加有關(guān)[3]。C反應(yīng)蛋白(C-reactive protein,CRP)是慢性持續(xù)性炎癥因子,de Pablo等[4]的一項(xiàng)大樣本臨床對(duì)照研究表明CRP是機(jī)體骨密度的獨(dú)立影響因子。脂質(zhì)過氧化在絕經(jīng)女性骨質(zhì)減少、骨質(zhì)疏松方面發(fā)揮重要作用[5]。中性粒細(xì)胞/淋巴細(xì)胞比值(neutrophillymphocyte ratio,NLR)是與多種疾病有關(guān)的一種經(jīng)濟(jì)有效的炎癥指標(biāo),在心血管疾病、腸道疾病等被廣泛研究[6-7]。絕經(jīng)的本質(zhì)是卵巢功能的衰竭,機(jī)體雌激素的驟降。雌激素的缺乏導(dǎo)致絕經(jīng)女性骨質(zhì)丟失,逐漸發(fā)展為骨質(zhì)減少,甚至骨質(zhì)疏松及骨折。絕經(jīng)后機(jī)體處于慢性低度炎癥狀態(tài)[8],進(jìn)一步促進(jìn)骨量減少。本研究旨在探究絕經(jīng)后女性NLR、HCY、CRP、脂質(zhì)水平與骨質(zhì)減少的關(guān)系。

      1 對(duì)象與方法

      1.1對(duì)象收集2013年1月—2014年12月南京醫(yī)科大學(xué)附屬杭州醫(yī)院婦科門診就診絕經(jīng)10年內(nèi)女性269例,年齡45~60歲,平均絕經(jīng)(3.5±1.5)年。絕經(jīng)診斷標(biāo)準(zhǔn):女性自然絕經(jīng)大于1年,血清卵泡刺激素(FSH)水平≥40 IU/L。排除標(biāo)準(zhǔn):飲酒、吸煙、服用藥物(尤其是影響骨密度及鈣代謝的藥物)、應(yīng)用絕經(jīng)激素治療(menopause hormone therapy,MHT)及其他全身性疾病,如糖尿病、冠心病、心力衰竭和腫瘤。生化檢查(包括肝功能、腎功能等)和電解質(zhì)(包括血清鈣、磷)均正常。

      1.2方法采集受試者基本信息,包括年齡、絕經(jīng)年齡、身高、體質(zhì)量、體質(zhì)量指數(shù)(BMI)、腰臀比(WHR)、職業(yè)、受教育情況、月經(jīng)史和生育史。每位受試者入組時(shí)進(jìn)行Kupperman評(píng)分。骨密度采用雙能X線吸收測定法(DXA)測量,檢測部位為腰椎1~4節(jié)段及股骨頸。T值=(骨密度所測值-骨密度正常同性別人群峰值)/正常同性別人群峰值標(biāo)準(zhǔn)差。T值≥-1.0為骨質(zhì)正常,-2.5<T值<-1.0為骨質(zhì)減少,T值≤-2.5為骨質(zhì)疏松。根據(jù)骨密度測定結(jié)果將受試者分為骨質(zhì)正常組(n=128)和骨質(zhì)減少組(n=141)。血樣采集:晨起抽空腹肘正中靜脈血2 mL,置入促凝管中1 h后低溫高速離心(3 500 r/ min)10 min,取血清于1.5 mL無酶EP管中,-80℃冰箱保存待測。血細(xì)胞分析采用全自動(dòng)血液分析儀檢測(美國貝克曼庫爾特公司)。血清FSH、雌二醇(E2)水平采用放射免疫法測定(美國R&D公司)。HCY采用酶聯(lián)免疫吸附法測定,CRP、脂質(zhì)指標(biāo)采用化學(xué)發(fā)光免疫分析法測定(美國Sigma公司)。

      1.3統(tǒng)計(jì)學(xué)分析采用SPSS 19.0軟件進(jìn)行統(tǒng)計(jì)學(xué)分析。定量資料符合正態(tài)分布的數(shù)據(jù)用均數(shù)±標(biāo)準(zhǔn)差(x±s)表示,組間比較采用兩樣本均數(shù)比較的t檢驗(yàn);非正態(tài)分布的數(shù)據(jù)用中位數(shù)(M)和四分位數(shù)(P25,P75)表示,采用Mann-Whitney檢驗(yàn)進(jìn)行比較。絕經(jīng)后女性骨質(zhì)減少的影響因素(包括絕經(jīng)的年齡、絕經(jīng)時(shí)間、血清HCY、CRP、NRL、脂質(zhì)水平)分析用二項(xiàng)分類的Logistic回歸分析。P<0.05為差異有統(tǒng)計(jì)學(xué)意義。

      2 結(jié)果

      2.12組各指標(biāo)的比較2組患者年齡、BMI、Kupperman評(píng)分、潮熱癥狀評(píng)分及血清FSH、三酰甘油(TG)、總膽固醇(TC)、高密度脂蛋白(HDL)水平比較差異無統(tǒng)計(jì)學(xué)意義(均P>0.05)。骨質(zhì)正常組絕經(jīng)年齡和WHR大于骨質(zhì)減少組,絕經(jīng)時(shí)間、E2、血清NLR、低密度脂蛋白(LDL)、CRP、HCY水平低于骨質(zhì)減少組,差異有統(tǒng)計(jì)學(xué)意義(均P<0.05)。見表1和表2。

      2.2絕經(jīng)后女性骨質(zhì)減少的危險(xiǎn)因素分析以骨質(zhì)減少為應(yīng)變量,絕經(jīng)年齡、絕經(jīng)時(shí)間、WHR、血清NLR、LDL、CRP、HCY水平為自變量進(jìn)行二項(xiàng)分類Logistic回歸分析,結(jié)果顯示,絕經(jīng)年齡早、絕經(jīng)時(shí)間長及血清LDL、CRP、HCY、NLR水平升高是骨質(zhì)減少的危險(xiǎn)因素,見表3。

      2.3LDL,CRP,HCY,NLR的受試者工作特征曲線(ROC曲線)LDL,CRP,HCY和NLR的ROC曲線下面積(AUC)分別為0.796,0.759,0.845和0.804,Cut-off值分別為117.58 mg/dL,7.5 mg/dL,7.05 mg/dL 和2.24,表明LDL,CRP,HCY和NLR是絕經(jīng)后婦女骨質(zhì)減少的中等診斷指標(biāo)。見圖1和表4。

      表12 組患者年齡、絕經(jīng)年齡等指標(biāo)比較

      表22 組患者生殖內(nèi)分泌激素及代謝指標(biāo)比較

      表3 骨質(zhì)減少的影響因素

      圖1 LDL,CRP,HCY和NLR的ROC曲線

      表4 LDL,CRP,HCY,NLR的AUC及其可信區(qū)間

      3 討論

      多項(xiàng)臨床對(duì)照研究表明骨質(zhì)減少與機(jī)體慢性炎癥狀態(tài)、脂質(zhì)過氧化有關(guān)。炎癥因子參與其病理生理過程,如CRP、腫瘤壞死因子(TNF)、白細(xì)胞介素1 (IL-1)、IL-6[4,9-10]。據(jù)此,本研究進(jìn)一步探討骨質(zhì)減少與各種影響因素的關(guān)系。結(jié)果顯示,骨質(zhì)正常組與骨質(zhì)減少組的絕經(jīng)年齡、絕經(jīng)時(shí)間、NLR、CRP、LDL、HCY差異有統(tǒng)計(jì)學(xué)意義,表明絕經(jīng)時(shí)間的增加會(huì)促進(jìn)絕經(jīng)女性骨質(zhì)丟失,炎癥指標(biāo)(NLR,CRP)、脂質(zhì)代謝指標(biāo)(LDL)、氧化應(yīng)激指標(biāo)(HCY)異常,表明絕經(jīng)后機(jī)體處于慢性低度炎癥狀態(tài),進(jìn)一步促進(jìn)骨量減少。而2組BMI和血清FSH水平差異無統(tǒng)計(jì)學(xué)意義,進(jìn)行二項(xiàng)分類Logistic回歸分析也未發(fā)現(xiàn)BMI和 FSH與骨量的關(guān)系。de Pablo等[4]和Ding等[11]基于人群大樣本臨床對(duì)照研究表明血清CRP水平是骨質(zhì)減少的獨(dú)立危險(xiǎn)因素,且血清CRP水平與年齡、絕經(jīng)、BMI無相關(guān)性,與本研究結(jié)果一致。但是Berglundh等[12]研究表明血清CRP水平不能作為低骨量、骨質(zhì)疏松、骨折的評(píng)估指標(biāo),在這項(xiàng)研究中進(jìn)一步證實(shí)只有持續(xù)升高的血清CRP水平才可能不利于骨骼健康,加速骨質(zhì)丟失。本研究未能闡明CRP與骨質(zhì)減少的關(guān)系,有待進(jìn)一步證實(shí)。

      最新研究表明HCY代謝異常、脂質(zhì)過氧化與骨骼代謝有關(guān),同時(shí)HCY代謝異常促進(jìn)脂質(zhì)過氧化及氧化應(yīng)激[13]。Kuyumcu等[13]和Akpolat等[14]研究證實(shí)血清HCY水平升高與低骨量甚至骨質(zhì)疏松相關(guān)。另外,Akpolat等[14]研究表明氧化應(yīng)激指標(biāo)(HCY)與絕經(jīng)后女性骨質(zhì)疏松有關(guān)。Li等[15]研究發(fā)現(xiàn)HDL水平降低是絕經(jīng)后女性骨質(zhì)疏松的危險(xiǎn)因子,而未發(fā)現(xiàn)TG、TC、LDL與低骨量相關(guān),與Kuyumcu等[13]研究結(jié)果一致。但本研究表明LDL水平升高促進(jìn)骨量的丟失,可能的機(jī)制是LDL水平升高促進(jìn)脂質(zhì)過氧化、氧化應(yīng)激從而影響成骨細(xì)胞基質(zhì)微環(huán)境。未發(fā)現(xiàn)HDL促進(jìn)骨質(zhì)減少,其可能機(jī)制是HDL改善脂質(zhì)代謝,與既往研究一致[16-17]。

      Yilmaz等[18]研究發(fā)現(xiàn)NLR、CRP與絕經(jīng)后女性骨質(zhì)疏松有關(guān),但校正年齡、絕經(jīng)年齡等危險(xiǎn)因素發(fā)現(xiàn)NLR與腰椎2~4及股骨頸骨密度值呈負(fù)相關(guān)。對(duì)于評(píng)估骨質(zhì)減少甚至骨質(zhì)疏松,NLR可能是比CRP更合適的指標(biāo)。本研究表明NLR水平升高是骨質(zhì)減少的危險(xiǎn)因素,證實(shí)炎性反應(yīng)參與骨質(zhì)減少的發(fā)生發(fā)展。

      綜上所述,本研究表明早絕經(jīng),絕經(jīng)時(shí)間長及血清NLR、CRP、LDL、HCY水平升高是骨質(zhì)減少的危險(xiǎn)因素。絕經(jīng)年齡、絕經(jīng)時(shí)間、NLR、CRP、LDL、HCY可作為絕經(jīng)后女性骨質(zhì)減少的評(píng)價(jià)指標(biāo)。

      參考文獻(xiàn)

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      [本文編輯王琳]

      Relationship between Homocysteine,Lipid,CRP,NLR Levels and Osteopenia in Postmenopausal Women

      LIU Wen-hua,TANG Shan-shan,HUANG Zhe-ren,WEI Shuang-shuang,ZHANG Zhi-fen,CHEN Lin-jie.Department of Obstetrics and Gynecology,Hangzhou Hospital of Nanjing Medical University,Hangzhou 310006,China
      Corresponding author:ZHANG Zhi-fen,E-mail:zhangzf@zju.edu.cn

      【Abstract】Objective:To explore the relationship between homocysteine,lipid levels,CRP,NLR and Osteopenia in postmenopausal women.Methods:We collected 269 postmenopausal women from Gynecological Clinic of Hangzhou Hospital of Nanjing Medical University,who aged 45 to 60 years old,never used menopause hormone therapy.According to the bone mineral density(BMD)determination results subjects were divided into normal group(n=128)and osteopenia group(n=141). BMD was measured by dual-energy X-ray absorptiometry(DXA).Homocysteine were measured by enzyme chemiluminescence immunoassay.CRP and lipid indexes using chemiluminescence immunoassay.Results:There were significant differences between the two groups in menopause age,duration of menopause and serum levels of LDL,CRP,HCY and NLR(P<0.05). Menopausal age,duration of menopause,LDL,CRP,HCY and NLR are risk factors in postmenopausal women with osteopenia. The odds ratios and 95%confidence intervals of those variables were found to have significant difference between the two groups (P<0.01),and were as follows 0.755(0.623~0.914),1.408(1.043~1.901),1.038(1.018~1.058),1.398(1.115~1.753),3.534 (2.355~5.303)and 3.959(2.148~7.299).Conclusions:Menopausal age,duration of menopause,serum levels of LDL,CRP, HCY and NLR can be used as the evaluation index of bone loss in postmenopausal women.

      【Keywords】Osteoporosis,postmenopausal;Liposomes;C-reactive protein;Neutrophils;Lymphocytes;Homocysteine

      基金項(xiàng)目:國家衛(wèi)生和計(jì)劃生育委員會(huì)科研基金(WKJ-2013-2-024);杭州市衛(wèi)生科技計(jì)劃(重大)項(xiàng)目(2011Z003);杭州市科技發(fā)展計(jì)劃項(xiàng)目(20120533Q04)

      通信作者:張治芬,E-mail:zhangzf@zju.edu.cn

      收稿日期:(2015-08-04)

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