类风湿性关节炎活动性病变MRI征象及其与FIB、FDP、D-D的相关性研究

摘要 目的：探讨类风湿性关节炎（RA）活动性病变磁共振成像（MRI）征象及其与纤维蛋白原（FIB）、纤维蛋白(原)降解产物（FDP）、D-二聚体（D-D）的相关性研究。方法：选取2020年1月-2021年2月期间我院诊治的61例RA患者,根据28个关节疾病活动指数（DAS28）评分将其分为活动组（35例）和稳定组（26例）。对比两组MRI征象,血清FIB、FDP、D-D水平。采用Spearman相关性分析RA活动期患者MRI各征象间的相关性及MRI各征象与血清FIB、FDP、D-D水平间的相关性。结果：活动组滑膜增厚或滑膜炎、骨髓水肿、软骨及骨侵蚀、腱鞘炎或周围软组织受累、关节腔积液征象人数占比均高于稳定组（P＜0.05）。活动组患者血清FIB、FDP、D-D水平均高于稳定组（P＜0.05）。Spearman相关性分析结果显示,RA活动期患者滑膜增厚或滑膜炎征象与骨髓水肿、软骨及骨侵蚀、关节腔积液征象均呈正相关（P＜0.05）,骨髓水肿征象与软骨及骨侵蚀征象呈正相关（P＜0.05）;RA活动期患者滑膜增厚或滑膜炎、骨髓水肿、关节腔积液征象与血清FIB、FDP、D-D水平均呈正相关（P＜0.05）,软骨及骨侵蚀征象与FIB呈正相关（P＜0.05）。结论：MRI征象可清晰显示RA患者的滑膜、骨质、关节腔及周围肌腱、软组织等异常改变,且MRI征象之间具有相关性,可在一定程度上反映RA的病理改变;血清FIB、FDP、D-D的检测有助于反映RA活动情况;MRI征象与血清FIB、FDP、D-D水平间具有相关性,二者联合应用有助于进一步评估RA活动情况。     

T3期子宫内膜癌的MRI影像表现及其与ER、PR、C-erbB-2及Ki-67表达的关系研究

摘要 目的：探讨T3期子宫内膜癌的磁共振成像（MRI）影像表现及其与雌激素受体（ER）、孕激素受体（PR）、表皮生长因子受体2（C-erbB-2）及增殖细胞核抗原67（Ki-67）表达的相关性。方法：收集2016年1月-2021年10月于我院经手术病理证实为子宫内膜癌的患者194例,分析T3期子宫内膜癌的MRI影像表现,免疫组织化学染色方法检测子宫内膜癌患者ER、PR、C-erbB-2、Ki-67的表达,探讨T分期与ER、PR、C-erbB-2、Ki-67表达的关系及相关性,分析T3期子宫内膜癌MRI征象与ER、PR、C-erbB-2、Ki-67阳性表达的关系。结果：T3期子宫内膜癌MRI主要表现为子宫体积增大,子宫内膜明显不均匀增厚并见增多软组织团块形成,子宫全肌层连续性中断,浆膜面不光滑,可见子宫附件、宫颈、阴道、宫旁组织受累,可见腹主动脉旁、髂动脉旁及盆腔淋巴结转移。随着MRI诊断T分期级别增加,ER、PR阳性率逐渐降低,C-erbB-2、Ki-67阳性率逐渐升高;ER、PR、C-erbB-2、Ki-67阳性率在MRI诊断T分期中差异均有统计学意义（P＜0.05）。ER、PR阳性表达与MRI影像表现T分期呈负相关性（P＜0.05）,C-erbB-2、Ki-67阳性表达与MRI影像表现T分期呈正相关性（P＜0.05）。T3期子宫内膜癌MRI征象中有浆膜面受累、子宫附件受累、阴道受累及淋巴结转移或脉管癌栓时,多提示ER和PR阳性表达率降低,C-erbB-2和Ki-67阳性表达率升高,差异有统计学意义（P＜0.05）。结论：MRI检查对子宫内膜癌术前分期具有重要价值,影像表现与肿瘤标记物密切相关,可在一定程度上反映肿瘤细胞的恶性程度、分化程度、侵袭能力,有助于鉴别其病理分级,为临床综合治疗及预后提供依据。     

慢性牙周炎患者血清CGRP、PGE2、CCL20与牙周临床指标和Th17/Treg失衡的相关性分析

摘要 目的：探讨慢性牙周炎（CP）患者血清降钙素基因相关肽（CGRP）、前列腺素E₂（PGE₂）、C-C基序趋化因子配体20（CCL20）与牙周临床指标和辅助性T细胞17/调节性T细胞（Th17/Treg）失衡的相关性。方法：选取2018年3月～2022年1月本院收治的92例CP患者,根据病情严重程度分为轻度组28例、中度组33例、重度组31例。检查患者牙周临床指标,采用酶联免疫吸附法检测血清CGRP、PGE₂、CCL20水平,流式细胞术检测外周血Th17、Treg百分比并计算Th17/Treg。比较3组血清CGRP、PGE₂、CCL20水平和牙周临床指标及外周血Th17、Treg、Th17/Treg,采用Pearson相关系数分析CP患者血清CGRP、PGE₂、CCL20水平与牙周临床指标和Th17/Treg的相关性。结果：轻度组、中度组、重度组血清CGRP水平和外周血Treg比例依次降低,血清PGE₂、CCL20水平和探诊深度（PD）、出血指数（BI）、附着丧失（AL）、菌斑指数（PLI）及外周血Th17比例、Th17/Treg依次升高（P＜0.05）。Pearson相关系数显示,CP患者血清CGRP水平与PD、BI、AL、PLI、Th17/Treg呈负相关,PGE₂、CCL20水平与PD、BI、AL、PLI、Th17/Treg呈正相关（P＜0.05）。结论：血清CGRP、PGE₂、CCL20水平与CP患者牙周临床指标和Th17/Treg失衡密切相关,可能是CP发生发展的关键因子。     

对比超声造影与磁共振在子宫肌瘤的检测和定性中的应用研究

摘要 目的：探讨超声造影（CEUS）之于磁共振（MRI）在子宫肌瘤的检测和定性中的应用价值。方法：选取2016年5月～2022年3月中国人民解放军总医院第一医学中心经病理证实的46例子宫肌瘤患者作为研究对象,所有患者术前均行CEUS和MRI检查,分析并记录子宫肌瘤的数量、大小、位置和有无强化。两种检查方法检测出子宫肌瘤的大小采用t检验进行比较。两种检查方法检测出子宫肌瘤的数量、位置和有无强化采用x²检验进行比较。采用Pearson相关系数分析MRI和CEUS两种检查方法检测出子宫肌瘤的数量、大小、位置和有无强化的相关性。结果：46例患者术后病理总共检测出115个子宫肌瘤。MRI检测出111个（96.52%）,CEUS检测出106个（92.17%）。MRI和CEUS检查测量子宫肌瘤大小的平均值分别为（4.66±1.83）cm、（4.51±1.74）cm。CEUS检测出的子宫肌瘤中有103个的位置无异议,MRI检测出的子宫肌瘤中有107个的位置无异议。在CEUS检查中,有99个子宫肌瘤显示有强化;在MRI检查中,有102个子宫肌瘤显示有强化。两种影像学方法检测出子宫肌瘤的数量、大小、位置和有无强化对比差异均无统计学意义（均P＞0.05）。通过Pearson相关系数分析MRI和CEUS两种影像学检查方法检测出子宫肌瘤数量、大小、位置和有无强化的相关性分别为0.95、0.96、0.94、0.97（均P＜0.001）。结论：CEUS对子宫肌瘤的检测和定性诊断具有与MRI相同的诊断价值,可作为评估子宫肌瘤的一种替代成像方法。     

乳腺癌磁共振成像影像表现与糖类抗原153、癌胚抗原、铁蛋白的相关性研究

摘要 目的：探讨乳腺癌患者磁共振成像（MRI）影像表现与糖类抗原153（CA153）、癌胚抗原（CEA）、铁蛋白的相关性。方法：收集2018年1月-2022年3月于中国人民解放军联勤保障部队第九〇一医院经手术病理证实为乳腺癌的患者48例作为研究组,其中临床分期I期15例,II期19例,III期6例,IV期8例。另选取同时期经手术确诊为乳腺良性病变的患者36例作为对照组。分析比较研究组和对照组血清CA153、CEA、铁蛋白含量及不同临床分期乳腺癌患者血清CA153、CEA、铁蛋白含量的差异。采用Pearson分析乳腺癌患者MRI影像学表现与血清CA153、CEA、铁蛋白含量的相关性。结果：研究组血清CA153、CEA、铁蛋白含量均显著高于对照组,差异有统计学意义（P＜0.001）;III-IV期乳腺癌患者血清CA153、CEA、铁蛋白含量均显著高于I-II期,差异有统计学意义（P＜0.001）。经Pearson相关性分析显示,肿瘤直径越大和有淋巴结转移时,血清CA153、CEA、铁蛋白含量越高,即乳腺癌患者肿瘤直径和淋巴结转移与血清CA153、CEA、铁蛋白含量呈正相关性（P＜0.05）;而乳腺癌患者病灶类型、肿瘤形态、肿瘤边缘、强化特征和时间-信号强度曲线与血清CA153、CEA、铁蛋白含量无相关性（P＞0.05）。结论：乳腺癌患者血清CA153、CEA、铁蛋白的含量与临床分期相关,同时与MRI影像检查发现的肿瘤直径和淋巴结转移具有一定相关性。     

Biomarker clustering to address correlations in proteomic data

Correlated variables have been shown to confound statistical analyses in microarray experiments. The same effect applies to an even greater degree in proteomics, especially with the use of MS for parallel measurements. Biological effects such as PTM, fragmentation, and multimer formation can produce strongly correlated variables. The problem is compounded in some types of MS by technical effects such as incomplete chromatographic separation, binding to multiple surfaces, or multiple ionizations. Existing methods for dimension reduction, notably principal components analysis and related techniques, are not always satisfactory because they produce data that often lack clear biological interpretation. We propose a preprocessing algorithm that clusters highly correlated features, using the Bayes information criterion to select an optimal number of clusters. Statistical analysis of clusters, instead of individual features, benefits from lower noise, and reduces the difficulties associated with strongly correlated data. This preprocessing increases the statistical power of analyses using false discovery rate on simulated data. Strong correlations are often present in real data, and we find that clustering improves biomarker discovery in clinical SELDI-TOF-MS datasets of plasma from patients with Kawasaki disease, and bone-marrow cell extracts from patients with acute myeloid or acute lymphoblastic leukemia.     

Solubility correlations. Part 1. Simultaneous fitting of both solute and solvent properties

A method is described for estimating solubility by fitting both solute and solvent properties in a single equation. The method is illustrated by examining the solubilities of five rare gases (He, Ne, Ar, Kr, Xe) and five 'permanent' gases (O(2), N(2), CH(4), CF(4), SF(6)) in either n-alkane (C(5)H(12) to C(16)H(34)) or alkan-1-ol (CH(3)OH to C(11)H(23)OH) solvents. Generally, the correlation (R(2)) values of the fits achieved were significantly better than 0.9. It is suggested that similar methods can be used for estimating other physico-chemical properties such as excess molar volumes and enthalpies of solution.     

血清硫氧还蛋白1与脑外伤患者的白质恢复的相关性分析

为探讨血清硫氧还蛋白1 (thioredoxin 1, Trx1)含量与脑外伤后白质恢复的相关性关系,本研究选取60例脑外伤患者,根据格拉斯哥昏迷指数(Glasgow coma scale, GCS)将患者分为3组(轻度,中度和重度脑外伤患者),每组20例,采用核磁共振成像(magnetic resonance imaging, MRI)检测各组患者头颅白质情况,并通过ELISA方法检测各组患者血清Trx1水平,最后利用SPSS软件Pearson方法检测血清硫氧还蛋白1含量与脑外伤后白质恢复的相关性。结果显示,轻度脑损伤患者的GCS分值明显高于中度和重度脑外伤患者;轻度脑外伤患者的Trx1含量明显高于中度和重度患者;轻度和中度脑外伤患者的白质恢复情况明显优于重度患者;脑损伤患者的血清Trx1含量和白质恢复程度呈正相关。本研究初步结论表明脑外伤患者的白质恢复情况与血清Trx1存在正相关性关系,这将为脑外伤的治疗提供新思路。     

Home environment and cord blood levels of lead,arsenic, and zinc on neurodevelopment of 24 months children living in Chitwan Valley,Nepal

In a birth cohort living in Chitwan Valley, lowland Nepal, we have previously reported inverse associations between in utero levels of lead (Pb), arsenic (As) and neurodevelopment at birth measured by the Brazelton Neonatal Behavioral Assessment Scale, third edition (NBAS III). In the present paper, a follow-up of the same cohort was made on 24-month-old infants regarding the neurodevelopmental effects of these metals, taking the postnatal environment into account. In total, the same100 mother-infant pairs as the previous study, whose Pb, As, and Zn concentrations in cord blood were known, were recruited. Postnatal raising environment was evaluated using the Home Observation for Measurement of Environment (HOME) scale. Neurodevelopment of children at 24 months of age (n = 74) was assessed using the Bayley Scale of Infant Development, Second Edition (BSID II). Multivariable regression adjusting for covariates was performed to determine the associations of in utero levels of toxic and essential elements and the home environment with neurodevelopment scores. Unlike the NBAS III conducted for newborns, none of the BSID II cluster scores in 24-month-old infants were associated with cord blood levels of Pb, As, and Zn. The total HOME score was positively associated with the mental development scale (MDI) score (coefficient = 0.67, at 95% CI = 0.03 to 1.31). In this cohort, a detrimental effect of in utero Pb and As on neurodevelopmental indicators observed at birth disappeared at 24 months, while an association between neurodevelopment and home environment continued.