[摘要]"目的"探討絕經(jīng)后女性血清miR-27b-3p與Ⅰ型前膠原氨基端前肽(N-terminal"propeptide"of"type"Ⅰ"procollagen,PINP)和Ⅰ型膠原C末端肽1(C-terminal"telopeptide"of"typeⅠcollagen"1,CTX-1)的相關(guān)性。方法"選取2022年2月至2023年2月于浙江中醫(yī)藥大學(xué)附屬第二醫(yī)院就診的49例絕經(jīng)后骨質(zhì)疏松患者為研究對象,根據(jù)測得T值將其分為骨質(zhì)疏松(osteoporosis,OP)組(T≤–2.5SD,26例)和骨量減少(osteopenia,OPn)組(–2.5SDlt;Tlt;–1.0SD,23例)。檢測并比較兩組患者的血清miR-27b-3p、PINP、CTX-1表達(dá)水平,分析血清P1NP和CTX-1與miR-27b-3p的相關(guān)性。結(jié)果"OP組患者的血清miR-27b-3p、PINP/CTX-1水平均顯著低于OPn組,PINP和CTX-1水平均顯著高于OPn組(Plt;0.05);Pearson分析結(jié)果顯示,血清PINP和CTX-1水平與miR-27b-3p均呈負(fù)相關(guān)(Plt;0.05),PINP/CTX-1與miR-27b-3p呈正相關(guān)(Plt;0.05)。結(jié)論"血清miR-27b-3p水平可作為絕經(jīng)后女性骨形成的潛在標(biāo)志物。
[關(guān)鍵詞]"miR-27b-3p;骨代謝;絕經(jīng)后骨質(zhì)疏松;Ⅰ型前膠原氨基端前肽;Ⅰ型膠原C末端肽1
[中圖分類號(hào)]"R274.9""""""[文獻(xiàn)標(biāo)識(shí)碼]"A""""""[DOI]"10.3969/j.issn.1673-9701.2024.34.001
Expression"and"significance"of"serum"miR-27b-3p"in"patients"with"postmenopausal"osteoporosis
YE"Baisheng1,"YUAN"Yifeng2,"ZHOU"Hang1,"HUANG"Zhen1,"HUANG"Xudong1,"LI"Jinkun1,"SHI"Xiaolin2,"TANG"Binbin2
1.The"Second"School"of"Clinical"Medicine,"Zhejiang"Chinese"Medical"University,"Hangzhou"310053,"Zhejiang,"China;nbsp;2.Department"of"Orthopedics,"the"Second"Affiliated"Hospital,"Zhejiang"Chinese"Medical"University,"Hangzhou"310000,"Zhejiang,"China
[Abstract]"Objective"To"investigate"the"correlation"between"serum"miR-27b-3p"and"N-terminal"propeptide"of"type"Ⅰ"procollagen"(PINP)"and"C-terminal"telopeptide"of"typeⅠcollagen"1"(CTX-1)"in"postmenopausal"women."Methods"Forty-nine"patients"with"postmenopausal"osteoporosis"treated"in"the"Second"Affiliated"Hospital,"Zhejiang"Chinese"Medical"University"from"February"2022"to"February"2023"were"selected"as"study"objects."They"were"divided"into"osteoporosis"(OP)"group"(T≤–2.5SD,"26"cases)"and"osteopenianbsp;(OPn)"group"(–2.5SD"lt;"T"lt;"–1.0SD,"23"cases)."The"expression"levels"of"serum"miR-27b-3p,"PINP"and"CTX-1"in"two"groups"were"detected"and"compared,"and"the"correlation"between"serum"P1NP"and"CTX-1"and"miR-27b-3p"was"analyzed."Results"The"levels"of"serum"miR-27b-3p"and"PINP/CTX-1"in"OP"group"were"significantly"lower"than"those"in"OPn"group,"and"the"levels"of"PINP"and"CTX-1"were"significantly"higher"than"those"in"OPn"group"(Plt;0.05)."Pearson"analysis"showed"that"serum"PINP"and"CTX-1"levels"were"negatively"correlated"with"miR-27b-3p"(Plt;0.05),"while"PINP/CTX-1"was"positively"correlated"with"miR-27b-3p"(Plt;0.05)."Conclusion"Serum"miR-27b-3p"levels"may"serve"as"a"potential"marker"for"bone"formation"in"postmenopausal"women.
[Key"words]"miR-27b-3p;"Bone"metabolism;"Postmenopausal"osteoporosis;"N-terminal"propeptide"of"type"Ⅰ"procollagen;"C-terminal"telopeptide"of"type"Ⅰ"collagen"1
絕經(jīng)后骨質(zhì)疏松(postmenopausal"osteoporosis,PMOP)主要是由于女性卵巢功能衰退,雌激素缺乏,成骨細(xì)胞(osteoblast,OB)和破骨細(xì)胞(osteoclast,OC)的骨代謝紊亂所致[1-2]。研究表明中醫(yī)藥可通過多種信號(hào)通路同時(shí)調(diào)控OC和OB分化,改善骨代謝紊亂,防治PMOP[3-4]。雙能X射線吸收法是目前公認(rèn)的診斷骨質(zhì)疏松(osteoporosis,OP)的金標(biāo)準(zhǔn),而骨轉(zhuǎn)換標(biāo)志物可更早反映骨轉(zhuǎn)換的動(dòng)態(tài)[5]。骨轉(zhuǎn)換標(biāo)志物分為骨形成標(biāo)志物和骨吸收標(biāo)志物,國際骨質(zhì)疏松基金會(huì)首推Ⅰ型前膠原氨基端前肽(N-terminal"propeptide"of"type"Ⅰ"procollagen,PINP)和Ⅰ型膠原C末端肽(C-terminal"telopeptide"of"type"Ⅰ"collagen,CTX)這兩項(xiàng)指標(biāo)[6]。PINP可監(jiān)控OP的治療效果,其檢測結(jié)果不受激素干擾[7]。CTX作為骨吸收標(biāo)志物對OP有顯著的預(yù)測作用[8]。一系列微RNA(microRNA,miRNA)已被證實(shí)與骨轉(zhuǎn)換標(biāo)志物中的PINP和CTX存在相關(guān)性[9-10]。研究發(fā)現(xiàn)OC來源外泌體(osteoclast"derived"exosome,OC-Exo)內(nèi)miR-214-3p水平升高可抑制OB分化[11]。Tang""""等[12]報(bào)道OB來源外泌體內(nèi)的miR-433-3p可抑制Dickkopf-1蛋白表達(dá)以促進(jìn)OB分化。筆者前期研究發(fā)現(xiàn)miR-27b-3p可抑制OB內(nèi)Dickkopf-1蛋白表達(dá)來促進(jìn)成骨分化,強(qiáng)骨飲含藥血清可上調(diào)OC-Exo內(nèi)miR-27b-3p表達(dá),減弱OC-Exo對OB的抑制作用[13]。為更好地將研究結(jié)果轉(zhuǎn)化到臨床實(shí)踐,本研究觀察絕經(jīng)后女性血清miR-27b-3p水平與骨代謝指標(biāo)的相關(guān)性,探討miR-27b-3p是否可作為PMOP的參考標(biāo)志物。
1""資料與方法
1.1""試劑和儀器
1.1.1""試劑""Trizol試劑(Invitrogen,上海,15596026),PINP酶聯(lián)免疫吸附試驗(yàn)(enzyme"linked"immunosorbent"assay,ELISA)試劑盒(mlbio,上海,ml038554),人CTX-1"ELISA試劑盒(mlbio,上海,ml028171),血清總RNA提取試劑盒(mlbio,上海,ml095275),RevertAid"First"Strand"cDNA"Synthesis"Kit(Thermo,上海,K1622),SYBR"Green"qPCR"Master(Roche,上海,4943914001-SR)。
1.1.2""儀器""pH計(jì)(Metter-Toledo"GmbH,LP115),電子天平(北京賽多利斯,CPA),磁力攪拌器(江蘇中大,T8-1),酶標(biāo)儀(Thermo,mμ1ISKANMK3),離心機(jī)(湖南湘儀實(shí)驗(yàn)室,HI650),全自動(dòng)酶標(biāo)儀(Thermo"scientific,Multiskan"MK3),多功能電熱鍋(廣州PHEPELI,CRJ-130D-1)。
1.2""研究方法
1.2.1""臨床血清標(biāo)本收集""選取2022年2月至2023年2月于浙江中醫(yī)藥大學(xué)附屬第二醫(yī)院就診的絕經(jīng)后骨質(zhì)疏松患者為研究對象。參照世界衛(wèi)生組織推薦的OP診斷標(biāo)準(zhǔn),通過雙能X射線吸收法測量患者T1~T4椎體骨密度,根據(jù)中國人正常參考值計(jì)算T值,4個(gè)椎體骨密度T值取平均值,若T≥–1.0SD屬正常;若–2.5SDlt;Tlt;–1.0SD為骨量減少(osteopenia,OPn);若T≤–2.5SD為OP;T≤–2.5SD且伴有骨折者為嚴(yán)重OP。納入標(biāo)準(zhǔn):①絕經(jīng)后女性,年齡51~91歲;②雙能X線骨密度儀(法國MEDILINK,MEDIXDR)測量髖部及腰部骨密度結(jié)果提示OP或OPn;③對本研究方案知曉并簽署知情同意書。排除標(biāo)準(zhǔn):①近5年內(nèi)患有糖尿病、冠心病、惡性腫瘤及其他嚴(yán)重疾病者;②長期服用激素者;③拒絕采血者。研究共納入49例患者,根據(jù)測得T值將其分為OP組(T≤–2.5SD,26例)和OPn組(–2.5SDlt;Tlt;–1.0SD,23例)。本研究經(jīng)浙江中醫(yī)藥大學(xué)附屬第二醫(yī)院倫理委員會(huì)審查并備案(倫理審批號(hào):浙中醫(yī)大二院倫審2022研第043號(hào)-01)。
1.2.2""聚合酶鏈反應(yīng)""采集患者清晨空腹靜脈血2~3ml,離心,取上清液–80℃保存?zhèn)溆谩Mㄟ^血清總RNA提取試劑盒提取血清RNA。通過Quantus"Fluorometer測定RNA濃度。通過RevertAid"First"Strand"cDNA"Synthesis"Kit進(jìn)行逆轉(zhuǎn)錄,然后將互補(bǔ)DNA通過SYBR"Green"qPCR"Master進(jìn)行實(shí)時(shí)熒光定量聚合酶鏈反應(yīng),最后通過2-ΔΔCt計(jì)算相對水平。引物序列見表1。
1.2.3""ELISA檢測""分別采用PINP"ELISA試劑盒和CTX-1"ELISA試劑盒檢測血清PINP和CTX-1含量。設(shè)置標(biāo)準(zhǔn)品孔、樣本孔和空白孔。標(biāo)準(zhǔn)品孔加標(biāo)準(zhǔn)品50μl,空白孔加入50μl樣品稀釋液,樣本孔中加樣品稀釋液40μl及樣品10μl。用封板膜封板后置37℃溫育30min。棄液甩干,每孔加滿洗滌液,靜置30s后棄去,重復(fù)5次,拍干。之后每孔加入酶標(biāo)試劑50μl,空白孔除外。用封板膜封板后置37℃溫育30min。洗滌,每孔加入顯色劑A"50μl,再加入顯色劑B"50μl,輕輕震蕩混勻,37℃避光顯色15min。最后每孔加終止液50μl,終止反應(yīng)??瞻卓渍{(diào)零,450nm波長依序測量各孔的吸光度(OD值)。
1.3""統(tǒng)計(jì)學(xué)方法
采用SPSS"22.0和Prism"9軟件分析數(shù)據(jù)。計(jì)量資料符合正態(tài)分布的以均數(shù)±標(biāo)準(zhǔn)差(")表示,兩組間比較采用t檢驗(yàn);采用Pearson法分析數(shù)據(jù)相關(guān)性。Plt;0.05為差異有統(tǒng)計(jì)學(xué)意義。
2""結(jié)果
2.1""兩組患者的血清miR-27b-3p水平比較
OP組患者的血清miR-27b-3p水平顯著低于OPn組(Plt;0.05),見圖1。
2.2""兩組患者的血清PINP和CTX-1水平比較
OP組患者的血清PINP和CTX-1水平均顯著高于OPn組(Plt;0.05),見圖2。
2.3""血清PINP和CTX-1水平與miR-27b-
3p的相關(guān)性分析
Pearson分析結(jié)果顯示,血清PINP和CTX-1水平與miR-27b-3p均呈負(fù)相關(guān)(Plt;0.05),見圖3。
2.4""血清PINP/CTX-1與miR-27b-3p的相關(guān)性分析
OPn組患者的PINP/CTX-1水平顯著高于OP組(Plt;0.05),提示OPn組患者具有成骨分化能力。Pearson分析結(jié)果顯示,PINP/CTX-1與miR-27b-3p呈正相關(guān)(Plt;0.05),見圖4。
3""討論
本研究對血清骨代謝標(biāo)志物PINP和CTX-1與miR-27b-3p進(jìn)行相關(guān)性分析。PINP反映成骨細(xì)胞合成骨的能力,不易受晝夜節(jié)律、飲食的影響,在靜脈穿刺后的血清中非常穩(wěn)定[14]。PINP可監(jiān)控OP的治療效果,判斷是否需要繼續(xù)或重啟抗OP治療[15]。CTX-1則必須在清晨空腹?fàn)顟B(tài)下采集,其水平反映OC的骨吸收活性[14]。
近年來,對骨代謝或骨轉(zhuǎn)換標(biāo)志物與骨密度值、成骨或破骨活性因子的相關(guān)報(bào)道較多。本研究結(jié)果顯示miR-27b-3p表達(dá)水平間接反映成骨分化能力,通過與OPn患者比較,發(fā)現(xiàn)OP患者血清miR-27b-3p水平明顯更低。相關(guān)性分析提示miR-27b-3p與破骨分化標(biāo)志物和成骨分化標(biāo)志物均呈負(fù)相關(guān),符合PMOP女性骨代謝異常的表現(xiàn)。研究報(bào)道PMOP患者的血清β-CTX、PINP水平較高[16-17];束婷婷[18]"發(fā)現(xiàn)血清25羥維生素D水平降低及抗酒石酸酸性磷酸酶5b、PINP、β-CTX水平升高可能是發(fā)生PMOP的影響因素。PMOP患者血清內(nèi)骨硬化蛋白水平與PINP、β-CTX呈正相關(guān),提示PMOP患者的wnt/β-"catenin通路被抑制[19-20]。Mosti等[21]發(fā)現(xiàn)力量訓(xùn)練可提高PMOP患者骨量,PINP/CTX-1升高提示骨形成。
然而PINP和CTX無法反映骨細(xì)胞活動(dòng)或骨膜沉積,且不能反映骨組織的質(zhì)量[22]。隨著技術(shù)的進(jìn)步,miRNA可能成為骨代謝的新型標(biāo)志物。近年來,研究報(bào)道m(xù)iRNA作為骨代謝標(biāo)志物具有臨床意義,miRNA可調(diào)節(jié)骨形成和骨吸收,有助于維持骨穩(wěn)態(tài),參與細(xì)胞骨重塑[23]。異常的miRNA信號(hào)傳導(dǎo)可導(dǎo)致OP發(fā)生和發(fā)展[23-24]。骨代謝相關(guān)的miRNA在診斷PMOP中的作用初步體現(xiàn),如hsa-miR-144-5p、hsa-miR-506-3p和hsa-miR-8068等可用作骨代謝的新型生物標(biāo)志物,參與骨代謝[25]。Perksanusak等[26]發(fā)現(xiàn)PMOP患者血清miR-21與骨轉(zhuǎn)換標(biāo)志物無關(guān),但與骨密度水平呈正相關(guān)。參考Perksanusak等的研究,何至等[16]發(fā)現(xiàn)血清miR-21表達(dá)與血清β-CTX、PINP水平均呈負(fù)相關(guān),miR-21參與PMOP的發(fā)生、發(fā)展。鮑鋒元等[27]報(bào)道PMOP組的miRNA-17/92a基因簇含量顯著低于OPn組和對照組,血清PINP、β-CTX水平顯著高于OPn組和對照組。miRNA-"17/92a基因簇與PINP和β-CTX均呈顯著負(fù)相關(guān)。Ramírez-Salazar等[28]對754個(gè)miRNA進(jìn)行研究,發(fā)現(xiàn)miR-140-3p和miR-23b-3p可作為PMOP的潛在標(biāo)志物。Lu等[29]報(bào)道m(xù)iR-206/HDAC4通過調(diào)控OC增殖和凋亡,可作為新的診斷標(biāo)志物。Pepe等[30]通過觀察絕經(jīng)后OP、OPn和健康女性體內(nèi)細(xì)胞外泌體數(shù)量和質(zhì)量,發(fā)現(xiàn)OP患者的OC-Exo數(shù)量增加,間充質(zhì)干細(xì)胞成骨分化水平減弱。
綜上,PMOP患者血清miR-27b-3p水平降低,其可作為絕經(jīng)后女性骨形成的潛在標(biāo)志物。
利益沖突:所有作者均聲明不存在利益沖突。
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(收稿日期:2024–06–25)
(修回日期:2024–11–10)