[摘要] 目的
探討妊娠期糖尿病(GDM)合并胎膜早破孕婦腸道菌群變化及其與外周血單核細(xì)胞趨化蛋白-1(MCP-1)和生長(zhǎng)調(diào)節(jié)致癌基因-α(GRO-α)表達(dá)的關(guān)系。
方法 選取2020年1月—2023年11月在湖北醫(yī)藥學(xué)院附屬人民醫(yī)院就診的GDM合并胎膜早破孕婦162例為觀察組,同時(shí)選取單純GDM孕婦100例為對(duì)照A組,胎膜早破孕婦100例為對(duì)照B組,比較各組腸道菌群分布和外周血MCP-1與GRO-α表達(dá)差異,分析上述指標(biāo)與觀察組妊娠結(jié)局的關(guān)系。
結(jié)果 觀察組孕婦腸球菌含量明顯高于對(duì)照A和B組,而乳桿菌和雙歧桿菌均明顯低于對(duì)照A和B組(F=12.212~30.595,P<0.05)。觀察組外周血MCP-1和GRO-α表達(dá)均明顯高于對(duì)照A和B組(F=11.543、15.922,P<0.05)。觀察組不良妊娠結(jié)局孕婦腸球菌含量明顯高于非不良妊娠結(jié)局者,而乳桿菌和雙歧桿菌含量則明顯低于非不良妊娠結(jié)局者(t=-8.804~8.736,P<0.05);觀察組不良妊娠結(jié)局孕婦外周血MCP-1和GRO-α表達(dá)均明顯高于非不良妊娠結(jié)局者(t=7.278、11.133,P<0.05)。觀察組妊娠<37周產(chǎn)婦腸球菌含量明顯高于妊娠≥37周者,而乳桿菌和雙歧桿菌含量則明顯低于妊娠≥37周者(t=-8.756~8.683,P<0.05);觀察組妊娠<37周產(chǎn)婦外周血MCP-1和GRO-α表達(dá)均明顯高于≥37周者(t=5.832、12.612,P<0.05)。腸球菌含量與MCP-1及GRO-α表達(dá)均呈正相關(guān)(r=0.334、0.365,P<0.05);乳桿菌、雙歧桿菌含量與MCP-1及GRO-α表達(dá)均呈負(fù)相關(guān)(r=-0.381~-0.337,P<0.05)。
結(jié)論 GDM合并胎膜早破孕婦存在腸道菌群紊亂和炎癥反應(yīng),且在不良妊娠結(jié)局孕婦中表現(xiàn)更加明顯。腸道菌群變化與外周血MCP-1及GRO-α表達(dá)存在相關(guān)性。
[關(guān)鍵詞] 糖尿病,妊娠;胎膜早破;胃腸道微生物組;趨化因子CCL2;白細(xì)胞介素8
[中圖分類(lèi)號(hào)] R714;R378.2
[文獻(xiàn)標(biāo)志碼] A
[文章編號(hào)] 2096-5532(2024)05-0709-05
doi:10.11712/jms.2096-5532.2024.60.156
[網(wǎng)絡(luò)出版] https://link.cnki.net/urlid/37.1517.r.20241105.1030.006;2024-11-06 09:52:54
Changes in intestinal flora and their association with the expression of monocyte chemoattractant protein-1 and growth regulating oncogene-α in pregnant women with gestational diabetes mellitus complicated by premature rupture of membranes
WU Yingying, GAO Xia, LI Yan, GAO Ge, LIU Yi, CHENG Yangchun
(Department of Obstetrics, Renmin Hospital, Hubei University of Medicine, Shiyan 442000, China)
[Abstract]Objective To investigate the changes in intestinal flora and their association with the expression of monocyte chemoattractant protein-1 (MCP-1) and growth regulating oncogene-α (GRO-α) in peripheral blood in pregnant women with gestational diabetes mellitus (GDM) complicated by premature rupture of membranes.
Methods A total of 162 pregnant women with GDM complicated by premature rupture of membranes who attended Renmin Hospital, Hubei University of Medicine, from Ja-
nuary 2020 to November 2023 were enrolled as observation group, 100 pregnant women with simple GDM were enrolled as control group A, and 100 pregnant women with premature rupture of membranes were enrolled as control group B. The three groups were compared in terms of the distribution of intestinal flora and the expression of MCP-1 and GRO-α in peripheral blood, as well as their association with pregnancy outcome in the observation group.
Results Compared with the control groups A and B, the observation group had a significantly higher content of Enterococcus and significantly lower contents of Lactobacillus and Bifidobacterium (F=12.212-30.595,Plt;0.05). The observation group had significantly higher expression levels of MCP-1 and GRO-α in peripheral blood than the control groups A and B (F=11.543,15.922;Plt;0.05). As for the observation group, compared with the pregnant women with non-adverse pregnancy outcomes, the pregnant women with adverse pregnancy outcomes had a significantly higher content of Enterococcus and significantly lower contents of Lactobacillus and Bifidobacterium (t=-8.804 to 8.736,Plt;0.05), as well as significantly higher expression levels of MCP-1 and GRO-α in peripheral blood (t=7.278,11.133;Plt;0.05). As for the observation group, compared with the pregnant women with a gestational age of ≥37 weeks, the pregnant women with a gestational age of lt;37 weeks had a significantly higher content of Enterococcus and significantly lower contents of Lactobacillus and Bifidobacterium (t=-8.756 to 8.683,Plt;0.05), as well as signifi-cantly higher expression levels of MCP-1 and GRO-α in peripheral blood (t=5.832,12.612;Plt;0.05). The content of Enterococcus was positively correlated with the expression levels of MCP-1 and GRO-α (r=0.334,0.365;Plt;0.05), and the contents of Lactobacillus and Bifidobacterium were negatively correlated with the expression levels of MCP-1 and GRO-α (r=-0.381 to -0.337,Plt;0.05).
Conclusion Pregnant women with GDM and premature rupture of membranes have intestinal flora disturbance and inflammatory response, which are more obvious in pregnant women with adverse pregnancy outcomes. The changes in intestinal flora are correlated with the expression levels of MCP-1 and GRO-α in peripheral blood.
[Key words] diabetes, gestational; fetal membranes, premature rupture; gastrointestinal microbiome; chemokine CCL2; interleukin-8
妊娠期糖尿?。℅DM)是妊娠期常見(jiàn)代謝性疾病,該病嚴(yán)重威脅母嬰健康[1-2]。胎膜早破是指妊娠中晚期胎膜在臨產(chǎn)前自然破裂[3]。兩者合并發(fā)生可增加不良妊娠結(jié)局風(fēng)險(xiǎn),如早產(chǎn)、宮內(nèi)感染及圍產(chǎn)兒死亡率升高等[4-5]。單核細(xì)胞趨化蛋白-1(MCP-1)和生長(zhǎng)調(diào)節(jié)致癌基因-α(GRO-α)在GDM及胎膜早破的發(fā)病過(guò)程中扮演著重要角色[6-7]。研究認(rèn)為,腸道菌群是影響宿主新陳代謝的重要因素,腸道菌群對(duì)免疫調(diào)節(jié)、營(yíng)養(yǎng)物質(zhì)代謝及維生素合成過(guò)程等有調(diào)節(jié)作用[8-9]。但是,關(guān)于腸道微生物與GDM合并胎膜早破發(fā)生的關(guān)系尚少有研究報(bào)道。本研究探討GDM合并胎膜早破孕婦腸道菌群變化及其與外周血MCP-1和GRO-α表達(dá)關(guān)系,旨在為揭示GDM合并胎膜早破的復(fù)雜病理機(jī)制提供新見(jiàn)解。
1 資料與方法
1.1 研究對(duì)象
按照納入和排除標(biāo)準(zhǔn),選取2020年1月—2023年11月在湖北醫(yī)藥學(xué)院附屬人民醫(yī)院產(chǎn)科就診的GDM合并胎膜早破孕婦162例為觀察組,同時(shí)選取單純GDM孕婦100例為對(duì)照A組、血糖正常的胎膜早破孕婦100例為對(duì)照B組。3組孕婦除了對(duì)照B組空腹血糖明顯低于另兩組外(χ2=6.544,P<0.05),其他一般資料相比較差異均無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05),具有可比性。見(jiàn)表1。納入標(biāo)準(zhǔn):①GDM診斷符合《妊娠合并糖尿病診治指南》中的標(biāo)準(zhǔn)[10],胎膜早破診斷符合《胎膜早破的診斷與處理指南》中的標(biāo)準(zhǔn)[11];②單胎妊娠;③孕婦及家屬知情同意。排除標(biāo)準(zhǔn):①合并其他妊娠并發(fā)癥;②非正常受孕者;③合并有甲狀腺疾病、惡性腫瘤、血液系統(tǒng)疾病等其他嚴(yán)重疾病。本研究經(jīng)醫(yī)院倫理委員會(huì)批準(zhǔn)(2020倫第007號(hào))。
1.2 研究方法
1.2.1 炎癥因子檢測(cè) 采集所有受試者空腹靜脈血4 mL,以3 000 r/min離心10 min取血清,用酶聯(lián)免疫吸附法分別檢測(cè)C反應(yīng)蛋白(CRP)、MCP-1和GRO-α。試劑盒由美國(guó)R&D Systems 公司提供,檢測(cè)步驟均按照試劑盒說(shuō)明書(shū)操作。使用羅氏Accu-Chek Performa型血糖儀以電化學(xué)法檢測(cè)血糖濃度,分為<8.0 mmol/L組及≥8.0 mmol/L組。
1.2.2 腸道菌群檢測(cè) 收集所有受試對(duì)象每人20 g新鮮糞便于無(wú)菌容器中,并用生理鹽水稀釋10倍。取50 μL懸濁液接種于培養(yǎng)液,于37 ℃、含體積分?jǐn)?shù)0.05 CO2條件下培養(yǎng)48 h。使用VITEK2 COMPACT細(xì)菌鑒定儀進(jìn)行細(xì)菌檢測(cè)。然后,利用Icount 11自動(dòng)計(jì)數(shù)儀確定菌落數(shù)并計(jì)算細(xì)菌含量。細(xì)菌含量=平均菌落數(shù)×稀釋倍數(shù)×500。
1.3 統(tǒng)計(jì)學(xué)方法
采用SPSS 22.0軟件進(jìn)行統(tǒng)計(jì)學(xué)處理。計(jì)量資料數(shù)據(jù)采用±s表示,兩組均數(shù)比較采用獨(dú)立樣本t檢驗(yàn),多組均數(shù)比較采用方差分析檢驗(yàn)。計(jì)數(shù)資料數(shù)據(jù)以例數(shù)和百分?jǐn)?shù)表示,組間比較采用χ2檢驗(yàn)。相關(guān)性采用Pearson相關(guān)分析。以P<0.05為差異有統(tǒng)計(jì)學(xué)意義。
2 結(jié)" 果
2.1 各組孕婦腸道菌群分布和炎癥因子比較
腸道菌群檢測(cè)結(jié)果表明,觀察組孕婦腸球菌含量明顯高于對(duì)照A和B組,而乳桿菌和雙歧桿菌則明顯低于對(duì)照A和B組(F=12.212~30.595,P<0.05);各組大腸埃希菌、變形桿菌和葡萄球菌等含量比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。觀察組外周血MCP-1和GRO-α表達(dá)均明顯高于對(duì)照A和B組(F=11.543、15.922,P<0.05);各組CRP比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。提示GDM合并胎膜早破孕婦存在腸道菌群紊亂和炎癥反應(yīng)。見(jiàn)表2。
2.2 觀察組妊娠結(jié)局對(duì)腸道菌群和炎癥因子影響
將絨毛膜羊膜炎、產(chǎn)褥感染、胎兒窘迫、新生兒肺炎和新生兒病理性黃疸等作為不良妊娠結(jié)局,觀察組中不良妊娠結(jié)局孕婦104例、非不良妊娠結(jié)局者58例。觀察組不良妊娠結(jié)局孕婦腸球菌含量明顯高于非不良妊娠結(jié)局者,而乳桿菌和雙歧桿菌則明顯低于后者(t=-8.804~8.736,P<0.05);觀察組不良妊娠結(jié)局和非不良妊娠結(jié)局孕婦大腸埃希菌、變形桿菌和葡萄球菌含量比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。觀察組不良妊娠結(jié)局孕婦外周血MCP-1和GRO-α表達(dá)明顯高于非不良妊娠結(jié)局者(t=7.278、11.133,P<0.05)。提示妊娠結(jié)局對(duì)GDM合并胎膜早破孕婦腸道菌群紊亂和炎癥反應(yīng)有顯著影響。見(jiàn)表3。
2.3 觀察組分娩時(shí)間及血糖對(duì)腸道菌群和炎癥因子影響
觀察組妊娠<37周產(chǎn)婦腸球菌含量明顯高于妊娠≥37周者,而乳桿菌和雙歧桿菌則明顯低于妊娠≥37周者(t=-8.756~8.683,P<0.05)。觀察組妊娠<37周產(chǎn)婦外周血MCP-1和GRO-α表達(dá)明顯高于≥37周者(t=5.832、12.612,P<0.05)。觀察組的不同血糖濃度產(chǎn)婦腸道菌群分布和MCP-1、GRO-α及CRP表達(dá)比較,差異均無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。提示終止妊娠時(shí)間對(duì)GDM合并胎膜早破產(chǎn)婦腸道菌群紊亂和炎癥反應(yīng)有顯著影響,而不同血糖濃度則對(duì)其無(wú)明顯影響。見(jiàn)表4、5。
2.4 觀察組腸道菌群分布與炎癥因子及血糖濃度相關(guān)性
將觀察組孕婦腸道菌群分布與外周血MCP-1、GRO-α和CRP表達(dá)以及空腹血糖進(jìn)行Pearson相關(guān)性分析的結(jié)果顯示,腸球菌與MCP-1和GRO-α
表達(dá)呈顯著正相關(guān)(r=0.334、0.365,P<0.05);乳桿菌、雙歧桿菌與MCP-1和GRO-α均呈顯著負(fù)相關(guān)(r=-0.381~-0.337,P<0.05);腸道菌群分布與CRP和空腹血糖無(wú)顯著相關(guān)性(P<0.05)。提示GDM合并胎膜早破孕婦腸道菌群紊亂和炎癥反應(yīng)顯著相關(guān)。見(jiàn)表6。
3 討" 論
GDM孕婦的胎盤(pán)氧化應(yīng)激和炎癥反應(yīng)可損害胎盤(pán)結(jié)構(gòu)和功能,引起胎膜早破[12-13]。本研究旨在分析GDM合并胎膜早破孕婦腸道菌群變化及其與外周血MCP-1和GRO-α表達(dá)的關(guān)系。本文研究結(jié)果表明,觀察組的腸球菌含量顯著高于對(duì)照A組和B組,而乳桿菌和雙歧桿菌的含量則明顯低于這兩個(gè)對(duì)照組。提示GDM合并胎膜早破孕婦腸道微生態(tài)顯著失衡。GDM的高糖血癥為腸球菌等條件致病菌提供了豐富的營(yíng)養(yǎng)和良好的生長(zhǎng)條件,促進(jìn)其過(guò)度增殖,破壞腸道菌群的平衡。同時(shí),高糖血癥還能抑制有益菌的生長(zhǎng)和活性[14-15]。胎膜早破伴隨的感染可進(jìn)一步加劇腸道微生態(tài)的失衡[16-17]。還有研究表明,糖尿病、尿毒癥等疾病狀態(tài)下腸道菌群會(huì)發(fā)生顯著變化[18-20]。本文研究結(jié)果提示,GDM合并胎膜早破孕婦腸球菌的增多與乳桿菌及雙歧桿菌的減少顯著相關(guān),這豐富了以往研究的結(jié)論。
MCP-1與GRO-α在多種炎癥及免疫疾病中發(fā)揮重要作用[21-22]。本文研究結(jié)果表明,觀察組外周血MCP-1和GRO-α表達(dá)水平顯著高于對(duì)照A和B組,且二者在觀察組的不同妊娠結(jié)局產(chǎn)婦間也存在差異。MCP-1和GRO-α高水平表達(dá)通常與炎癥反應(yīng)的激活和增強(qiáng)相關(guān),GDM合并胎膜早破可導(dǎo)致孕婦體內(nèi)炎癥反應(yīng)的加劇,并與胎膜早破發(fā)病及其妊娠結(jié)局有關(guān)。已有研究表明,MCP-1可在胎盤(pán)、絨毛膜、蛻膜等組織中表達(dá)[23-24],絨毛膜-蛻膜界面的破裂可導(dǎo)致MCP-1進(jìn)入循環(huán)中[25-26]。結(jié)合本研究結(jié)果分析,MCP-1表達(dá)增加會(huì)刺激巨噬細(xì)胞活化,進(jìn)而增加宮腔壓力及減弱胎膜的張力,導(dǎo)致胎膜
早破。已有研究顯示,GRO-α異常升高會(huì)增強(qiáng)炎癥級(jí)聯(lián)反應(yīng),刺激胎盤(pán)巨噬細(xì)胞產(chǎn)生更多的白細(xì)胞介素-1β和腫瘤壞死因子-α,增大胎膜早破的發(fā)生風(fēng)險(xiǎn)[27-28]。本研究同時(shí)設(shè)立了單純GDM和單純胎膜早破的對(duì)照組,從而更準(zhǔn)確地揭示了GDM合并胎膜早破時(shí)的特異性變化。本文進(jìn)一步研究顯示,觀察組不良妊娠結(jié)局產(chǎn)婦與非不良妊娠結(jié)局者CRP表達(dá)差異無(wú)顯著性。因此,僅通過(guò)CRP來(lái)評(píng)估不良妊娠結(jié)局可能不夠準(zhǔn)確。
本文研究結(jié)果還顯示,觀察組妊娠<37周產(chǎn)婦腸球菌含量明顯高于妊娠≥37周者,前者乳桿菌和雙歧桿菌則明顯低于后者;觀察組妊娠<37周產(chǎn)婦外周血MCP-1和GRO-α表達(dá)明顯高于妊娠≥37周者。這些結(jié)果共同說(shuō)明早產(chǎn)可能與腸道菌群失衡以及炎癥反應(yīng)增強(qiáng)之間存在潛在聯(lián)系。但是,本研究由于樣本量不足或分組不夠細(xì)致,觀察組內(nèi)不同血糖濃度孕婦的腸道菌群分布和炎性因子表達(dá)比較差異不顯著。
本文進(jìn)一步研究顯示,腸球菌含量與MCP-1和GRO-α表達(dá)呈正相關(guān),乳桿菌和雙歧桿菌含量與MCP-1和GRO-a表達(dá)呈負(fù)相關(guān)。其機(jī)制可能為病原微生物通過(guò)激活MCP-1和GRO-α引起炎癥反應(yīng),從而參與胎膜早破的發(fā)生發(fā)展,導(dǎo)致不良菌群大量繁殖,誘導(dǎo)炎癥細(xì)胞與細(xì)菌蛋白酶的相互作用,造成胎膜張力下降,誘發(fā)胎膜早破[29]。提示可以通過(guò)調(diào)節(jié)腸道菌群分布干預(yù)GDM合并胎膜早破的發(fā)生和進(jìn)展,為臨床制定治療方案提供依據(jù)。
綜上所述,GDM合并胎膜早破孕婦腸道菌群存在紊亂,外周血MCP-1和GRO-α表達(dá)明顯升高,且在不良妊娠結(jié)局孕婦中更加明顯,腸道菌群變化與外周血MCP-1和GRO-α表達(dá)存在相關(guān)性。本文研究結(jié)果可為臨床對(duì)該病的干預(yù)提供依據(jù)。然而,本文尚有很多不足之處,本研究為回顧性研究,樣本來(lái)源單一而且樣本量小,研究結(jié)果可能存在一定偏倚,今后尚需進(jìn)行多中心、大樣本研究來(lái)進(jìn)一步驗(yàn)證本文結(jié)論。
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(本文編輯 于國(guó)藝)
[收稿日期]2024-04-16; [修訂日期]2024-08-30
[基金項(xiàng)目]湖北省衛(wèi)生健康委面上項(xiàng)目(WJ2019M049)
[第一作者]吳瑩瑩(1993-),女,主管護(hù)師。
[通信作者]程楊春(1986-),女,主管護(hù)師。E-mail:48781-004@qq.com。