三种相关分析计算法的比较研究

在医学实验数据处理中,常用相关分析方法是研究分析一个时间移变序列是否相对于时间具有线性或拟线性关系,故一般叫线性相关关系,简称相关关系.常见的10种拟线性关系可见文献.但是这种分析方法能否比较两个数字时间序列或医学信号波形((一般离散化),特别是两序列本身相对于     

原癌基因HCCR mRNA、FBI-1 mRNA在肝癌相关患者血液中的表达及意义

【目的】探讨原癌基因HCCRmRNA、FBI－1mRNA在肝癌相关患者血液中的表达及其与临床指标的关系。【方法】采用荧光定量聚合酶链反应（PCR）技术,检测41例肝细胞癌、3例肝硬化患者术前血液标本及10例健康者血液标本中HCCRmRNA、FBI—1mRNA含量,分析其与临床指标的关系。【结果】肝细胞癌患者血液中HCCRmRNA、FBI－1mRNA水平高于肝硬化患者,健康者血液中未发现两基因的mRNA表达。同时发现,血液中FBI－1mRNA与甲胎蛋白（AFP）水平显著相关（P〈0．01）,FBI－1mRNA与HCCRmRNA的表达水平显著相关（P〈0．01）。【结论】肝细胞癌、肝硬化患者血液中HCCRmRNA、FBI－1mRNA表达异常增高,FBI－1mRNA表达与AFP水平显著相关。     

脓毒症患者高迁移率族蛋白1水平与卫气营血辨证、APACHEⅡ评分的相关性研究

[目的]探讨不同中医证型脓毒症患者血清高迁移率族蛋白1(HMGB1)水平与急性生理和慢性健康评估Ⅱ(APACHEⅡ)评分、卫气营血辨证分型的相关性.[方法]24例脓毒症患者按卫气营血辨证分为气分证组11例、营血分证组13例,并设8例正常对照组;分别进行APACHEⅡ评分,采用Western blot法检测各组患者血清HMGB1含量,并对HMGB1水平、APACHEⅡ评分及卫气营血辨证证型进行相关性分析.[结果]营血分证组APACHEⅡ评分显著升高,与气分证组比较差异有显著性意义(P＜0.01),且不同辨证分型与APACHEⅡ评分呈正相关(P＜0.01);气分证组、营血分证组患者血清HMGB1水平较正常对照组显著升高(P＜0.05或P＜0.01),而营血分证组血清HMGB1水平较气分证组显著升高(P＜0.01),且不同辨证分型与血清HMGB1水平、APACHEⅡ评分与血清HMGB1水平均呈正相关(P＜0.01).[结论]脓毒症按卫气营血理论辨证,可反映其病理过程及病情严重程度.     

慢性肺源性心脏病心肺相关规律研究

[目的]以五脏相关学说为理论基础,探讨心肺相关规律,进一步阐述及完善“五脏相关学说”及中医对慢性肺源性心脏病(简称肺心病)证候规律的认识.[方法]根据中医脏腑证候辨析制定临床信息采集表,详细采集并记录346例肺心病住院患者的症状、中医证候表现,在所列症状中,若涉及该系脏腑其中两项以上者即认定为病例涉及该系脏腑,再将临床...     

应用肝脾相关理论干预慢性重型肝炎肠黏膜屏障功能的研究

[目的]观察应用肝脾相关理论干预慢性重型肝炎的临床疗效及探讨其对肠黏膜屏障的保护作用.[方法]选取慢性重型肝炎患者60例,采用简单随机法将患者随机分为对照组(基础治疗+凉血解毒法)30例和观察组(基础治疗+凉血解毒法+健脾益气法)30例,疗程2周,共2个疗程,观察治疗前后症状积分、血清学变化和治疗后总有效率,同时观察2...     

Functional Characterization of PHEX Gene Variants in Children With X-Linked Hypophosphatemic Rickets Shows No Evidence of Genotype–Phenotype Correlation

X-linked hypophosphatemia (XLHR) is caused by loss-of-function mutations in the phosphate regulating endopeptidase homolog X-linked (PHEX) gene. Considerable controversy exists regarding genotype–phenotype correlations in XLHR. The present study describes the clinical features and molecular genetic bases of 53 pediatric patients with XLHR. Overall, 47 different mutations were identified, of which 27 were not previously described in the literature or entered in the Human Gene Mutation Database (HGMD). A high prevalence (72.34%) of truncating variants was observed in XLHR patients. The clinical presentation and severity of XLHR did not show an evident correlation between the truncating and non-truncating mutation types in our cohort. To further delineate the characteristics of PHEX variants underlying this nonsignificant trend, we assessed the effects of 10 PHEX variants on protein expression, cellular trafficking, and endopeptidase activity. Our results showed that the nonsense mutations p.Arg567*, p.Gln714*, and p.Arg747* caused a reduction of protein molecular weight and a trafficking defect. Among seven non-truncating mutations, the p.Cys77Tyr, p.Cys85Ser, p.Ile281Lys, p.Ile333del, p.Ala514Pro, and p.Gly572Ser mutants were not secreted into the medium and remained trapped inside cells in an immature form, whereas the p.Gly553Glu mutant was terminally glycosylated and secreted into the medium. We further assessed the endopeptidase activity of the p.Gly553Glu mutant using a quenched fluorogenic peptide substrate and revealed that the activity of p.Gly553Glu significantly reduced to 13% compared with the wild type, which indicated disruption of catalytic function. These data not only support the clinical results showing no correlation between disease severity and the type of PHEX mutation but also provide helpful molecular insights into the pathogenesis of XLHR. © 2020 American Society for Bone and Mineral Research.     

An investigation into the relationship between soft tissue body composition and bone mineral density in a young adult twin sample

The purpose of this study was to investigate the relationship of fat mass (FM) and lean mass (LM) with bone mineral density (BMD) independent of genetic effects. We also assessed the extent to which genetic and environmental influences explain the associations between these phenotypes. Body composition and BMD were measured using dual‐energy X‐ray absorptiometry in 57 monozygotic and 92 same‐sex dizygotic twin pairs, aged 23 to 31 years, chosen to represent a wide range of intrapair differences in body mass index (BMI; 0 to 15.2 kg/m²). Heritability estimates were adjusted for height and gender. In multiple linear regression analysis, intrapair differences in both FM and LM were independently associated with intrapair differences in BMD at most skeletal sites after adjustment for gender and differences in height. Within monozygotic and dizygotic pairs, LM was a significantly stronger predictor of whole‐body BMD than FM (p < .01). Additive genetic factors explained 87% [95% confidence interval (CI) 80%–91%), 81% (95% CI 70%–88%), and 61% (95% CI 41%–75%) of the variation in whole‐body BMD, LM, and FM, respectively. Additive genetic factors also accounted for 69% to 88% of the covariance between LM and BMD and for 42% to 72% of the covariance between FM and BMD depending on the skeletal site. The genetic correlation between LM and whole‐body BMD (r_g = 0.46, 95% CI 0.32–0.58) was greater than that of FM and whole‐body BMD (r_g = 0.25, 95% CI 0.05–0.42). In conclusion, our data indicate that peak BMD is influenced by acquired body weight as well as genetic factors. In young adulthood, LM and BMD may have more genes in common than do FM and BMD. © 2011 American Society for Bone and Mineral Research.     

肱骨髁上骨折断端移位因素导致时内翻的定量分析──多元线性回归和逐步回归分析

采用定量分析法，以折端旋转角度公式及两折端倾斜角和空间投影角为工具，对不同移位因素作多元回归和逐步回归分析，以探讨当肱骨髁上骨折整复后，遗留移位所产生肘内翻的因素。结果显示：原始损伤机制可以成立（Ｐ＜０．０１）；尺倾、内旋是肘内翻的主要相关因素（Ｐ＜０．０１）；桡倾、外旋是肘内翻的主要负相关因素（Ｐ＜０．０１）。并就倾、旋对肘内翻的影响进行了讨论。     

从五行到五脏相关——中医五脏系统关联理论的创新

通过阐析五脏相关学说与五行学说的历史继承性、五脏相关学说的方法论与理论特点及五脏相关的模式与渠道,提出五脏相关学说是纯粹从医学角度来体现五行思想的核心--"五脏关联性"的应用性理论模型.从五行到五脏相关并不仅仅是一个简单的名称更换,而是在现念上的突破,在实质内容上的突破,是对中医五脏系统关联理论的创新.     

不同经脉电针对半结扎家兔小肠所致心脏损害的保护性影响

半结扎小肠可引起心脏的变化，肉眼可见轻度或中等度充血，部分出现心腔轻度扩大；镜下出现间质瘀血、心肌变性及灶性坏死。电针小肠经和心经均能明显减轻国半结扎小肠所致的心脏损害，与电针非经和对照组比较差异显著或非常显著，表明小肠经和心经与心脏有相关性以及小肠经与心经相关。