基于质谱与生物信息学的冠状动脉严重钙化患者血浆蛋白质组学研究

目的:基于非标记蛋白组学方法筛选冠状动脉(冠脉)严重钙化病变患者外周血浆中的特异性蛋白质标志物.方法:采用数据非依赖采集质谱技术检测30例冠脉严重钙化病变患者与30例非钙化对照人群血浆,生物信息学软件进一步分析差异表达蛋白质数据.结果:冠脉严重钙化病变患者与非钙化人群血浆相比较,共筛选出表达量差异2倍以上的差异蛋白共2...     

Potential novel biomarkers of disease activity in rheumatoid arthritis patients: CXCL13, CCL23, transforming growth factor alpha, tumor necrosis factor receptor superfamily member 9, and macrophage colony-stimulating factor

OBJECTIVE: To determine whether the plasma levels of a range of inflammatory proteins have utility as biomarkers of disease activity in rheumatoid arthritis (RA) patients. METHODS: Plasma proteins (n = 163) were profiled in 44 patients with RA diagnosed according to the American College of Rheumatology 1987 criteria (22 with active and 22 with quiescent disease) and in 16 age- and sex-matched healthy controls. The utility of a subset of differentially expressed proteins as predictors of RA disease activity was investigated using partial least-squares discriminant analysis, and their response to therapeutic intervention was evaluated in plasma from an additional cohort of 16 patients with active RA treated with anti-tumor necrosis factor alpha (anti-TNFalpha). RESULTS: The protein profiling study identified 25 proteins that were differentially expressed in plasma samples from patients with active RA (P for the false discovery rate < or = 0.01) compared with those with quiescent RA, including the previously described interleukin-6 (IL-6), oncostatin M, and IL-2, and the 5 less-established markers macrophage colony-stimulating factor (M-CSF), tumor necrosis factor receptor superfamily member 9, CCL23, transforming growth factor alpha, and CXCL13. Systemic levels of these 5 markers correlated with the C-reactive protein level, erythrocyte sedimentation rate, rheumatoid factor level, tender joint count in 68 joints, and Disease Activity Score in 28 joints (DAS28), and their combined plasma levels were shown to be good predictors of disease activity (kappa = 0.64). In anti-TNFalpha-treated RA patients, plasma levels of CXCL13 were reduced after 1 and 7 days of therapy, and levels of CCL23, M-CSF, and CXCL13 showed a statistically significant positive correlation with the DAS28 score. CONCLUSION: This exploratory study for biomarker discovery led to the identification of several proteins predictive of RA disease activity that may be useful in the definition of disease subphenotypes and in the measurement of response to therapy in clinical studies.     

类风湿关节炎患者外周血单个核细胞蛋白质组学研究

目的 运用蛋白质组学的方法,比较正常人及早期活动性类风湿关节炎(RA)患者外周血单个核细胞(PBMCs)蛋白质的差异表达,寻找RA疾病相关致病蛋白质.方法 选取9例早期活动期RA患者以及9名健康成年志愿者,用淋巴细胞分离液分离PBMCs,抽提PBMCs中的蛋白,采用同相pH梯度(IPG)双向凝胶电泳(2-DE)分离正常人及RA患者PBMCs总蛋白质.凝胶经考马斯亮蓝染色显色后,PDQuest图像分析软件进行比较分析、识别差异表达的蛋白质,对差异蛋白质点用基质辅助激光解析电离飞行时间质谱(MALDI-TOF-MS)进行鉴定,运用反转录-聚合酶链反应(RT-PCR)方法验证部分差异蛋白质.结果 获得RA患者及正常人PBMCs蛋白质双向凝胶电泳图谱,平均蛋白质点数分别为556和579,匹配率分别为89.4%和 88.5%,通过比较分析,差异表达蛋白质点数为23,选取18个点进行质谱鉴定,成功鉴定14个蛋白质,其中a-肌动蛋白、纤维蛋白素原a-链、载脂蛋白A-I(ApoA-I)等9个蛋白质点在RA中表达上调,硫氧还蛋白-2、谷胱甘肽S-转移酶等6个蛋白质点在RA中表达下调,这些差异蛋白质的功能涉及物质代谢、抗氧化、信号传导、能量产生及细胞骨架.并用RT-PCR方法验证差异蛋白质ApoA-I.其结果与上述蛋白质差异表达结果相符.结论 在RA患者PBMCs中存在着差异表达蛋白质,这些差异蛋白质可能是RA发病的内在因素.其RT-PCR结果与蛋白质差异表达相符,证明蛋白质组研究的可靠性.     

Identification and verification of transthyretin as a potential biomarker for pancreatic ductal adenocarcinoma

Purpose

Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers worldwide and is difficult to detect at its early stages when treatment is most effective. Therefore, we performed a comparative proteomic study to identify new biomarkers for the detection of PDAC.

Methods

Serum samples from patients with PDAC, chronic pancreatitis and normal controls were compared using two-dimensional difference gel electrophoresis (2D-DIGE). Differentially expressed separated proteins were subsequently identified by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF/TOF–MS). Then, transthyretin (TTR), one of the differentially expressed proteins, was validated through real-time PCR, western blot and immunohistochemistry. Finally, enzyme-linked immunosorbent assays (ELISA) were employed to confirm the levels of transthyretin in the sera.

Results

A total of 21 protein spots showed greater than 1.5-fold changes in expression level in the sera from PDAC patients compared with the normal controls. Among the identified proteins, validation experiments verified the differential expression of transthyretin in PDAC tissue, confirming the proteomic data showing that transthyretin was significantly elevated in patients with PDAC. The ELISA results revealed that the sensitivity and specificity for TTR and CA19-9 in distinguishing PDAC patients from normal individuals were 90.5, 47.6, 66.7 and 85.7 %, respectively, and 81.0 and 85.7 % for their combination.

Conclusions

These results suggest that the level of transthyretin is elevated in patients with PDAC. In combination with CA19-9, transthyretin may provide additional information for the detection of PDAC and should be further investigated.     

The comparative analysis of serum proteomes for the discovery of biomarkers for acute myeloid leukemia

OBJECTIVE: Acute myeloid leukemia (AML) develops as the consequence of a series of genetic changes in a hematopoietic precursor cell. However, the definitive diagnostic protein biomarkers for AML are still unclear. In our study to identify the biomarkers for an initial diagnosis, detection of relapse, and monitoring the minimal residual disease in AML by a less invasive method, serum proteins reflecting alterations in their proteomes were analyzed. MATERIALS AND METHODS: We compared the two-dimensional electrophoresis patterns of human sera of 12 patients with AML with those of 12 normal subjects. The differentially expressed spots were identified by matrix-assisted laser desorption/ionization time-of-flight and electrospray ionization quadupole time-of-flight mass spectrometries. RESULTS: Eight proteins that expressed differentially in the AML group were found. The expression levels of alpha-2-HS-glycoprotein, complement-associated protein SP-40, 40, RBP4 gene product, lipoprotein C-III, and an unknown protein were downregulated in serum of AML patients, whereas the other three proteins, including immunoglobulin heavy-chain variant, proteosome 26S ATPase subunit 1, and haptoglobin-1 were upregulated. CONCLUSION: These results suggest that these proteins can be used as less invasive diagnostic and monitoring biomarkers of AML if further studies are done.     

慢加急性肝衰竭不同预后患者血浆外泌体差异蛋白的生物信息学分析

目的筛选不同预后慢加急性肝衰竭(ACLF)患者血浆外泌体中的差异蛋白,分析其功能及生物学过程,为患者临床诊断提供参考依据。方法前瞻性选取2019年7月—10月于首都医科大学附属北京佑安医院住院确诊的ACLF患者10例,随访90 d,患者死亡或肝移植归入肝移植/死亡组(n=5),患者存活归入生存组(n=5),两组一般资料指标比较采用Mann-Whitney U秩和检验。采用非标记(Label-free)定量蛋白质组学技术对血浆外泌体蛋白进行鉴定和定量分析,筛选差异蛋白并进行功能富集分析,使用R-3.5.1软件对差异蛋白进行层次聚类分析,分析其参与的生物学过程。结果外泌体蛋白质组学分析共鉴定出860种蛋白,以倍数上调>1.2倍或下调>1.2倍且P<0.05的标准筛选出差异表达蛋白116种,与肝移植/死亡组相比,生存组上调蛋白62种、下调蛋白54种。生物信息学分析结果显示,这些蛋白主要参与了免疫反应、信号转导、囊泡介导的转运、细胞死亡和增殖等生物学过程,并与炎症反应、糖类和氨基酸代谢、肝细胞损伤及再生等信号通路密切相关。结论非标记定量蛋白质组学技术筛选出的差异蛋白可能作为ACLF早期诊断及预后判断的血清学标志物。     

Proteomic analysis of gastric cancer and immunoblot validation of potential biomarkers

AIM: To search for and validate differentially expressed proteins in patients with gastric adenocarcinoma.METHODS: We used two-dimensional gel electrophoresis and mass spectrometry to search for differentially expressed proteins in patients with gastric adenocarcinoma. A set of proteins was validated with immunoblotting.RESULTS: We identified 30 different proteins involved in various biological processes: metabolism, development, death, response to stress, cell cycle, cell communication, transport, and cell motility. Eight proteins were chosen for further validation by immunoblotting. Our results show that gastrokine-1, 39S ribosomal protein L12 (mitochondrial precursor), plasma cell-induced resident endoplasmic reticulum protein, and glutathione S-transferase mu 3 were significantly underexpressed in gastric adenocarcinoma relative to adjacent non-tumor tissue samples. On the other hand, septin-2, ubiquitin-conjugating enzyme E2 N, and transaldolase were significantly overexpressed. Translationally controlled tumor protein was shown to be differentially expressed only in patients with cancer of the gastric cardia/esophageal border.CONCLUSION: This work presents a set of possible diagnostic biomarkers, validated for the first time. It might contribute to the efforts of understanding gastric cancer carcinogenesis.     

Differential plasma proteome profiles of mild versus severe β-thalassemia/Hb E

The severity of thalassemia is currently classified based on clinical manifestations and multiple tests. In the present study, we performed a plasma proteome analysis to identify differentially expressed proteins compared between normal subjects and patients with mild and severe forms of β-thalassemia/hemoglobin E (Hb E). Plasma samples were collected from patients with mild (n?=?8) and severe (n?=?12) forms as well as healthy normal individuals (n?=?12). Clinical chemistry revealed that several parameters, i.e., hematological indices, oxidative stress markers, antioxidant enzymes, and erythropoietic activity, had significant differences among these three groups. After removal of seven major abundant proteins, the plasma proteome profiles were compared using two-dimensional gel electrophoresis. Spot matching, quantitative intensity analysis, and statistics revealed differential levels of 32 and 9 proteins when comparing normal vs. patients and mild vs. severe forms, respectively. These proteins were successfully identified by quadrupole time-of-flight mass spectrometry and/or tandem mass spectrometry. The decreased level of ADP-ribosylation factor guanine nucleotide-exchange factor 2 in β-thalassemia/Hb E patients compared to healthy individuals and the decreased level of endothelin-converting enzyme 2 in severe form compared to the mild form of the disease were validated by Western blot analysis. Our data provide a number of proteins that may lead to better understanding of the pathophysiology of thalassemia or for novel biomarkers which can be used to simply differentiate mild and severe forms of β-thalassemia/Hb E without any need for multiple tests.     

肝泡型包虫病特异microRNA的筛选及初步研究

目的肝泡型包虫病由多房棘球蚴感染造成,通过对肝泡型包虫病患者组织和血浆中差异表达的miRNA进行筛查,寻找肝泡型包虫病新的生物标志物。方法纳入2016年6月—2018年5月在青海大学附属医院确诊的肝泡型包虫病患者,选取2例肝泡型包虫病患者的病灶边缘组织和3例临近病灶边缘的正常组织,以及3例肝泡型包虫病患者和3例健康对照者的血浆样本,使用Agilent Human miRNA芯片检测组织和血浆的miRNA表达谱,根据差异倍数(FC>1.2)和P值(P<0.05)筛选差异表达的miRNA,根据差异miRNA的靶基因预测结果,结合文献报道,选择与肝脏疾病相关的血浆miRNA和组织miRNA进行实时荧光定量PCR(qRT-PCR)验证。计量资料2组间比较采用t检验,相关性分析采用Spearman相关分析。结果肝泡型包虫病患者中的microRNA表达谱与健康人相比有显著不同,qRT-PCR验证发现6个microRNA中有3个miRNA(hsa-miR-4644,hsa-miR-136-5p,hsa-miR-483-3p)在肝泡型包虫病患者中显著差异表达(P<0.05)。其中hsa-miR-4644和hsa-miR-483-3p在肝泡型包虫病患者中显著上调表达(P值均<0.05),hsa-miR-136-5p显著下调表达(P<0.05)。通过TargetScan,PITA,microRNAorg数据库对差异miRNA进行靶基因预测,对三个数据库预测到的靶基因取交集,共有137个基因和miRNA之间有靶向关系。差异的hsa-miR-483-3p靶向调控参与人体免疫反应及与肝脏疾病有关的基因(IL-17A,IL-5,CD40LG,TAP2,TNF)。通过GO与KEGG分析发现,hsa-miR-483-3p的靶基因在免疫缺陷(Primary immunodeficiency)信号通路,IL-17信号通路,TNF信号通路中起重要作用。结论肝泡型包虫病有独特的microRNA表达谱,其中hsa-miR-483-3p可作为肝泡型包虫病的一种新的生物学标志物,其调控的靶基因主要参与Primary immunodeficiency信号通路,IL-17信号通路,TNF信号通路。但这些miRNA与肝泡型包虫病之间的调控关系有待进一步验证。     

急性心肌梗死患者血浆外泌体mRNA表达谱分析

目的 比较分析急性心肌梗死(AMI)患者和非心源性胸痛(NCCP)患者血浆外泌体中mRNA的表达差异,并探讨差异表达mRNA对AMI发生发展可能的影响。方法 入选北京朝阳医院和内蒙古包头市中心医院NCCP患者和AMI患者各15例。提取入选者血浆外泌体及外泌体总RNA,高通量测序技术检测AMI患者和NCCP患者血浆中外泌体信使RNA(mRNA)的表达谱,筛选出AMI患者中差异表达的mRNA。对差异表达mRNA进行基因本体(GO)分析和京都基因与基因组百科全书(KEGG)信号通路分析。结果 提取的外泌体为粒径在30~200 nm之间的双层膜小囊泡,表达外泌体标志分子分化簇63(CD63)和热休克蛋白70(HSP70),而不表达甘油醛-3-磷酸脱氢酶(GAPDH),符合外泌体的特征。对入选AMI患者和NCCP患者血浆外泌体中的mRNA表达量进行检测,AMI患者血浆中外泌体转录本数量为64 258条,NCCP患者血浆中外泌体转录本数量为64 374条。其中差异表达的mRNA共1 800条(上调951条,下调849条)。GO和KEGG分析表明上述差异表达的mRNA参与了AMI的生物学调节功能和通路。结论 AMI患者血浆外泌体中mRNA的表达水平与NCCP组比较存在明显的差异,这些差异表达的外泌体mRNA可能在AMI的发生发展过程中发挥重要的作用。     

B淋巴细胞刺激因子在自身免疫性疾病发病机制中的作用

目的　探讨血浆B淋巴细胞刺激因子 (BlyS)在自身免疫性疾病发病机制中的作用。 方法　选自 2 0 0 2- 0 8～ 2 0 0 3- 0 8的深圳市南山人民医院及美国南加州大学医学院病人 ,80例系统性红斑狼疮 (SLE)、38例类风湿关节性关节炎 (RA)及 2 8例对照。分别用ELISA、特定蛋白仪和RT -PCR法测定血浆BlyS、免疫球蛋白、抗双链DNA和细胞内BlySmRNA的表达。结果　SLE和RA患者血浆BlyS质量浓度明显高于正常组 (P <0 0 1和P <0 0 5 )。BlyS明显升高的SLE患者 ,其血浆IgG和IgA质量浓度也相应升高 ,二者有一定的相关性。且血浆中抗双链DNA抗体阳性率及BlySmRNA的表达均明显高于血浆低BlyS组。 结论　BlyS促进SLE和RA病情的发生。Ig、抗双链DNA抗体产生及细胞内mRNA表达的增加与BlyS的升高有关。     

二乙基亚硝胺诱发大鼠肝癌过程中癌前病变阶段差异表达蛋白质的筛选

目的 通过比较二乙基亚硝胺(DEN)诱发大鼠肝细胞癌发生过程中不同阶段的蛋白质表达谱,筛选在大鼠肝癌前病变阶段起重要作用的蛋白质分子. 方法大鼠分为DEN组和正常对照组,诱癌过程中定期处死动物并取其肝组织;以γ-谷氨酰转肽酶染色阳性的肝细胞增生灶为标志,识别和获取肝癌前病变的组织标本.用双向电泳及基质辅助激光解吸飞行时间串联质谱法对大鼠正常肝组织、癌前病变组织和肝癌组织的全蛋白质组表达谱进行比较和鉴定.用Western blot和RT-PCR方法对部分差异表达蛋白质(如层黏连蛋白受体1和鲱精胺酶)进行表达水平的验证.结果 筛选出表达水平差异≥2倍的蛋白质共82种,其中在癌前病变阶段即发生明显改变的差异表达蛋白质有47种,包括在正常对照组、癌前病变组、肝癌组呈现依次上调的层黏连蛋白受体1等8种蛋白质和在上述组织中呈现依次下调的鲱精胺酶等22种蛋白质.Western blot和RT-PCR方法对层黏连蛋白受体1和鲱精胺酶表达水平的验证结果与双向电泳的结果相似.结论 大鼠肝癌形成过程中不同阶段的蛋白质表达谱有所不同,对癌前病变的差异表达蛋白质如层黏连蛋白受体1和鲱精胺酶等进行深入探讨,有望为人类肝癌的早期诊断和治疗提供线索.     

基于生物信息学分析类风湿关节炎与动脉粥样硬化相互作用的分子机制

目的]基于生物信息学分析探寻类风湿关节炎(RA)和动脉粥样硬化(As)相互影响及作用的分子机制。 [方法]从GEO数据库下载RA和As的基因表达谱,通过测试集发现RA和As之间的差异表达基因,通过富集分析探讨常见差异表达基因的生物学作用。利用Cytoscape软件构建差异表达基因蛋白质-蛋白质相互作用网络并筛选核心基因。TRRUST数据库揭示的转录调控关系预测转录因子。转录因子在测试集中验证,核心基因通过验证集和血液样本验证。 [结果]本研究共鉴定出198个差异表达基因。差异表达基因功能富集分析主要在细胞因子调控的信号通路、白细胞迁移、白细胞正向调控以及细胞因子与细胞因子受体相互作用中。Cytoscape展示了差异表达基因和基因聚类模块,得到核心基因CCL5、CCR1、CCR2、CCR5、IRF8、ITGAM、ITGB2、LCP2、NCF2和PTPRC,验证集结果显示基因尚且可靠。通过TRRUST预测出可调控CCR1和IRF8的转录调控因子STAT1,且验证结果可靠。qPCR验证结果显示,As合并RA的患者CCR1和IRF8的表达水平显著高于健康者。 [结论]CCR1和IRF8产生的调节作用很可能是RA合并As的核心因素。     

基于生物信息学的糖尿病心肌病生物标志物及关键通路的筛选

目的通过对基因表达(GEO)数据库中糖尿病心肌病(DCM)相关的基因芯片进行生物信息学分析,获得DCM的生物标志物及其调控的关键通路。方法从GEO数据库获取DCM的基因表达芯片(GSE26887),并借助DAVID在线分析平台对这些基因进行基因本体论(GO)富集分析和京都基因与基因组百科全书(KEGG)信号通路分析,同时利用生物信息学软件STRING 10.0构建这些基因的蛋白-蛋白相互作用(PPI)网络。结果本研究中所采用的芯片GSE26887共包含7例DCM患者及5名健康对照。共筛选出差异表达基因(DEGs)236个,包括134个上调基因及102个下调基因。其中,差异最大的5个上调基因依次为NPPA、SFRP4、DSC1、NEB及FRZB;差异最大的5个下调基因依次为SERPINE1、SERPINA3、ANKRD2、XRCC4及S100A8。GO和KEGG结果表明,DCM发展过程中的DEGs主要富集在炎症、免疫紊乱、代谢紊乱、线粒体功能障碍等方面。PPI网络揭示连接度最高的15个hub基因依次为IL-6、MYC、ACTA2、SERPINE1、ASPN、SPP1、KIT、TFRC、FMOD、PDE5A、MYH6、FPR1、C3、CDKN1A及SOCS3。结论 DCM患者的DEGs与炎症、免疫紊乱及能量代谢密切相关,本研究所筛选出的差异最大的5个上调基因和5个下调基因有望成为DCM诊断的标志分子,15个hub基因有望成为DCM治疗的靶点。     

Long non-coding RNAs expression profile and functional analysis of acute ischemic stroke

Long non-coding RNAs (lncRNAs) have been evidenced to be associated with the development of multiple diseases. However, the expression pattern and function of lncRNAs in acute ischemic stroke remain unclear. To determine the differential expression of lncRNAs in acute ischemic stroke, we analyzed the expression profile of lncRNAs by high-throughput sequencing analysis. Gene Ontology (GO) and pathway analyses were employed to analyze the gene function and identify enriched pathways of the differentially expressed lncRNAs. We also built an lncRNA-mRNA expression correlation network and verified the interactions of selected lncRNAs in acute ischemic stroke. To further confirm the results of the expression profile, 6 differentially expressed lncRNAs were randomly selected and quantitative RT-PCR (qRT-PCR) performed. We identified 44,578 aberrantly expressed lncRNAs, including 228 upregulated and 16 downregulated lncRNAs. The qRT-PCR results showed that ENSG00000269900, ENSG00000196559, ENSG00000202198, ENSG00000226482, ENSG00000260539 (up), and XLOC_013994_2 (down) were abnormally expressed, which was consistent with the sequencing results. The upregulated expression of lncRNA ENSG00000226482 may activate the adipocytokine signaling pathway, resulting in acute ischemia stroke. In summary, we analyzed the lncRNAs expression profile in acute ischemic stroke patients and identified the functions and enriched metabolic pathways, proposing new insights into the diagnostic and therapeutic biomarkers for this disease.     

A biomarker panel for acute graft-versus-host disease

No validated biomarkers exist for acute graft-versus-host disease (GVHD). We screened plasma with antibody microarrays for 120 proteins in a discovery set of 42 patients who underwent transplantation that revealed 8 potential biomarkers for diagnostic of GVHD. We then measured by enzyme-linked immunosorbent assay (ELISA) the levels of these biomarkers in samples from 424 patients who underwent transplantation randomly divided into training (n = 282) and validation (n = 142) sets. Logistic regression analysis of these 8 proteins determined a composite biomarker panel of 4 proteins (interleukin-2-receptor-alpha, tumor-necrosis-factor-receptor-1, interleukin-8, and hepatocyte growth factor) that optimally discriminated patients with and without GVHD. The area under the receiver operating characteristic curve distinguishing these 2 groups in the training set was 0.91 (95% confidence interval, 0.87-0.94) and 0.86 (95% confidence interval, 0.79-0.92) in the validation set. In patients with GVHD, Cox regression analysis revealed that the biomarker panel predicted survival independently of GVHD severity. A panel of 4 biomarkers can confirm the diagnosis of GVHD in patients at onset of clinical symptoms of GVHD and provide prognostic information independent of GVHD severity.     

Identification of cholesterol gallstone with two-dimensional gel electrophoresis and mass spectrometry

Background and rationale. We aimed to provide novel information to better understand the molecular mechanisms underlying gallstones formation and explore the potential protein markers for gallstones progression. The gallbladder tissues were collected from 20 patients with cholesterol gallstone and 10 liver transplant donors from November 2010 to April 2011. The proteomics were compared between gallstone patients and controls by two-dimensional gel electrophoresis (2-DE). The differentially expressed proteins were identified and validated by western blotting and real-time PCR.Results. Total 19 protein spots were found to be different between two groups and 11 proteins were identified, among which 4 ones (such as Peroxiredoxin 3/Prdx3) were down-regulated and 7 (such as Tropomyosin 4/TPM4, Transgelin/SM22, Transthyretin/TTR) were up-regulated in gallstone group. Results of western blotting and RT-PCR were consistent with the 2-DE results. Conclusion. The differentially expressed proteins of TTR, TPM4, SM22 and Prdx3 may play key roles in gallstone formation and may be markers for gallstone progression.     

高原环境下妊娠期母体缺氧对子代心脏发育的蛋白组学改变产生的影响

目的 探索高原环境中母体绵羊妊娠期缺氧对胎羊心脏发育的蛋白组学影响。方法 将15只妊娠期绵羊随机分为平原对照组(LAC，n=6)，轻度低氧暴露组(MHE，n=5) 和重度低氧暴露组(SHE，n=5)。应用高原人工实验舱建立不同程度的妊娠期绵羊缺氧模型，建模120天后应用iTRAQ 技术检测评估胎羊心脏不同蛋白的表达情况。结果 本实验共鉴定了16676个肽段和2506个蛋白质，共鉴定出80个差异表达的蛋白，其中41个蛋白表达上调，39个蛋白表达下调。不同分组间检验阈值为缺氧诱导蛋白表达水平的1.3倍以上，P＜0.05，差异有统计学意义。结论 本实验证实母体妊娠期缺氧能够显著影响胚胎心脏发育过程中与缺氧相关蛋白的表达，验证母体妊娠期低氧环境在子代先天性心脏损伤发生中的作用及其可能机制，为临床先天性心脏疾病的一级预防提供了借鉴。