老年人群血浆HCY水平与MTHFRC677T基因多态性

目的:对血浆同型半胱氨酸(HCY)水平与N5,N10-亚甲基四氢叶酸还原酶(MTHFR)C677T基因位点的基因多态性进行分析,了解其在健康老年人群中的分布情况。方法:采用酶联免疫吸附法进行血浆HCY水平测定;采用聚合酶链反应-限制性片段长度多态性法(PCR-RFLP)对MTH-FRC677T进行基因多态性分析。结果:健康老年人群血浆HCY水平为(11.0±2.8)μmol/L,老年男、女性人群血浆HCY水平无显著性差异。老年男、女性人群中MTHFRC677T基因的CC、CT和TT基因型频率与C、T等位基因频率差异均无显著性。MTHFRC677T位点各基因型间,血浆HCY水平亦无显著性差异。结论:本试验数据可为MTHFR基因突变与HCY代谢相关疾病病因研究假设提供遗传学数据。     

高同型半胱氨酸血症与深静脉血栓形成

目的研究亚甲基四氢叶酸还原酶(MTHFR)C677T位点基因多态性及血清叶酸、维生素B12(VitB12)与血浆同型半胱氨酸(Hcy)水平和深静脉血栓形成DVT的关系。方法采用聚合酶链反应-限制性片段长度多态性法(PCR-RFLP)检测111例对照者和69例DVT患者的MTHFRC677T基因型,放射免疫法(RIA)测定血清叶酸和VitB12浓度,荧光偏振免疫法(FPIA)测定血浆Hcy水平。结果DVT组与对照组MTHFRC677T的TT基因型频率和T等位基因频率均无显著性差异;DVT组的血浆Hcy水平为(13.03±8.74)μmol/L,明显高于对照组的(10.14±4.30)μmol/L(P<0.05),两组叶酸和VitB12的差异均无显著性;高同型半胱氨酸血症增加了DVT患病的危险性(OR=2.53,95%CI1.08～5.92)。低叶酸水平和TT基因型共同作用增加DVT危险性(OR=3.1295%CI1.17～8.38)。结论高同型半胱氨酸血症是汉族人DVT发病的独立危险因素;血清叶酸水平、MTHFRC677T位点基因多态性均不是DVT的独立危险因素,但两者间存在的交互作用可共同影响血浆Hcy水平。     

育龄女性MTHFR基因多态性与HCY关系的研究

目的:通过对育龄女性叶酸代谢关键酶5,10-亚甲基四氢叶酸还原酶MTHFR C677T的基因多态性检测,分析MTHFR C677T基因多态性与外周血中同型半胱氨酸HCY的关系。方法:选取孕前或孕期育龄女性100名,基因芯片法检测外周血中MTHFR C677T的基因多态性,并对所有育龄女性口服800μg叶酸1个月,循环酶法检测口服叶酸前后不同基因型女性外周血中HCY水平。结果:本地区育龄妇女中MTHFR C677T基因CC型、CT型、TT型的检出频率分别为26%、54%、20%;口服叶酸前CC型、CT型、TT型受试者HCY水平分别为9.5±3.4、11.8±3.1、15.3±3.5,口服叶酸后CC型、CT型、TT型受试者HCY浓度较口服前低,分别为8.1±2.8、8.4±2.7、11.0±3.3,CC型受试者口服叶酸前后平均HCY水平之间差异无统计学意义(P>0.05),CT型和TT型受试者口服叶酸前后平均HCY水平之间差异有统计学意义(P<0.05)。结论:口服叶酸可以改善由于MTHFR C677T基因突变引起的高HCY血症,合理补充叶酸可以避免由于高HCY血症引起的出生缺陷。     

育龄女性MTHFR基因多态性检测的临床意义

目的:通过检测育龄女性外周血中叶酸代谢关键酶5,10-亚甲基四氢叶酸还原酶MTHFR C677T的基因多态性、同型半胱氨酸HCY以及D-二聚体,分析MTHFR C677T基因多态性与HCY、D-二聚体的关系。方法:选取孕前或孕期育龄女性100名,基因芯片法检测外周血中MTHFR C677T的基因多态性,循环酶法检测外周血中HCY、D-二聚体水平。结果:本地区育龄妇女中MTHFR C677T基因CC型、CT型、TT型的检出频率分别为26%、54%、20%;CC型、CT型、TT型受试者HCY水平分别为(9.5±3.4)μmol/L、(11.8±3.1)μmol/L、(15.3±3.5)μmol/L,CT型、TT型受试者HCY水平要高于CC型受试者(P<0.05);CC型、CT型、TT型受试者D-二聚体水平分别为(176.5±80.5)μg/L、(221.1±91.2)μg/L、(242.1±90.3)μg/L,CT型、TT型受试者D-二聚体水平要高于CC型受试者(P<0.05)。结论:MTHFR C677T基因突变可以引起高HCY血症,使机体处于一种高凝状态,进而增加婴幼儿的出生缺陷率。     

MTHFR C677T基因多态性对H型高血压患者血压和HCY水平的影响

目的 ：探讨亚甲基四氢叶酸还原酶基因(methylenetetrahydrofolate reductase, MTHFR)C677T基因多态性对H型高血压患者血压和同型半胱氨酸(homocysteine, HCY)水平的影响。方法 ：选取2021年7月—2022年4月于江苏省如东县人民医院心内科门诊就诊及住院的H型高血压患者162例为观察组,非H型高血压患者154例为对照组。检测MTHFR C677T基因型、血压和血清HCY水平。结果：观察组收缩压和血清HCY水平明显高于对照组,TT基因型和T等位基因频率明显高于对照组。观察组TT型患者收缩压和血清HCY水平均高于CC型患者(均P<0.05)。结论：MTHFR C677T基因多态性可能对H型高血压患者血压和HCY水平产生影响。     

亚甲基四氢叶酸还原酶基因C677T多态性与冠心病患者冠状动脉病变及叶酸水平相关性研究

目的:探究冠心病患者冠状动脉病变及叶酸水平与其亚甲基四氢叶酸还原酶基因(MTHFR)C677T多态性的相关性。方法:将98例冠心病患者以及同期接受健康检查的35例正常人作为研究对象,将其分为冠心病组与正常组,对两组受检者MTHFR C677T多态性和叶酸水平进行检验并分析患者的冠状动脉病变程度差异,对其之间的关系进行详细分析。结果:两组受检者MTHFR C677T基因型及等位基因频率分布无统计学差异(P>0.05),冠心病组患者的同型半胱氨酸(Hcy)水平显著高于正常组(P<0.05)。从受检患者MTHFR C677T基因型分布情况来看,随着患者冠状动脉病变情况的程度加深患者TT及TC基因型频率分布和患者Hcy水平逐渐增加,CC基因型频率分布逐渐下降,TC、CC基因型和Hcy水平组间对比差异无统计学意义(P<0.05),TT基因型频率分布组间对比差异无统计学意义(P>0.05)。从MTHFR C677T基因型与叶酸水平的关系来看,TT、TC基因个体的叶酸水平均较CC基因个体高(P<0.05)。结论:MTHFR C677T基因多态性与叶酸水平以及冠心病患者发病风险之间存在明显的关系,患者血清Hcy水平上升也就是叶酸浓度降低以及MTHFR C677T基因型多态性尤其是携带T基因型的患者具有较高的冠心病患病风险,同时MTHFR C677T基因型多态性还与冠心病患者的病情进展存在一定联系,能够对冠心病患者的病情进展状况进行判断,增加了临床针对性治疗和患者疗效评价的有效参考指标。     

冠心病患者亚甲基四氢叶酸还原酶基因的多态性

目的研究冠心病患者亚甲基四氢叶酸还原酶(MTHFR)677位(C-T)多态性及其与血浆同型半胱氨酸(Hcy)水平、冠心病之间的关系。方法聚合酶链反应-限制性片段长度多态性(PCR-RFLP)分析冠心病组(冠脉造影显示至少有一支血管狭窄≥50%)122例与对照组(冠脉造影未发现任何可辨认斑块或狭窄)56例MTHFR677位(C-T)多态性;荧光衍生后高相液相色谱法检测血浆总Hcy水平。SPSS 11.5统计软件分析。结果(1)MTHFR 677位(C-T)有3种基因型(TT,TC,CC),两组基因型分布和等位基因频率分布差异有统计学意义(P<0.05)。(2)冠心病组Hcy水平[μmol/L,(12.99±4.76)]高于对照组(10.95±4.75)(P<0.05)。冠心病、基因型对Hcy水平都有影响(P<0.001)。(3)TT型Hcy水平(15.45±4.41)高于CC型及TC型[分别为(10.49±3.73),(11.55±4.88),P<0.001]。TC基因型与CC基因型Hcy差别无统计学意义(P>0.05)。结论MTHFR 677位C-T多态性与冠心病可能有关;Hcy与冠心病和MTHFR 677位C-T多态性可能有关。     

中青年复发性脑梗死与亚甲基四氢叶酸还原酶基因多态性相关性研究

目的 探讨亚甲基四氢叶酸还原酶（MTHFR）基因C677T位点多态性与中青年复发性脑梗死（RIS）的关系。方法 选取2010年1月-2014年8月齐齐哈尔医学院附属第三医院神经内科收治的中青年RIS患者126例为复发组,另选择同时期收治的首次发病的中青年脑梗死患者130例为首发组,采用聚合酶链反应-限制片段长度多态性法检测分析MTHFR基因C677T位点多态性;采用高效液相色谱法测定血浆同型半胱氨酸（Hcy）水平,采用全自动电化学发光免疫分析仪检测血浆维生素B12、叶酸水平。结果 复发组患者高血压病史、吸烟率均高于首发组（P＜0.05）。两组患者MTHFR基因C677T位点基因型分布比较,差异有统计学意义（P＜0.05）;复发组患者T等位基因频率较首发组升高（P＜0.05）。复发组TT、CC基因型患者血浆Hcy水平较首发组TT、CC基因型患者升高（P＜0.05）;两组TC基因型患者血浆Hcy水平比较,差异无统计学意义（P＞0.05）。两组CT、CC基因型患者血浆维生素B12、叶酸水平比较,差异无统计学意义（P＞0.05）;两组TT基因型患者血浆维生素B12水平比较,差异无统计学意义（P＞0.05）;复发组TT基因型患者血浆叶酸水平较首发组TT基因型患者降低（P＜0.05）。结论 MTHFR基因TT基因型是中青年RIS的重要因素,TT基因型中青年RIS患者存在高Hcy及低叶酸,建议对此类患者应尽早合理补充叶酸。     

亚甲基四氢叶酸还原酶基因多态性和血浆同型半胱氨酸水平与首发精神分裂症的关系

目的 探讨亚甲基四氢叶酸还原酶(MTHFR)基因多态性及血浆同型半胱氨酸(HCY)水平与首发精神分裂症的关系.方法 应用聚合酶链反应-限制性片段长度多态性技术(PCR-RFLP)和荧光偏振免疫法(FPIA)检测100例首发精神分裂症患者及100例正常健康对照者的MTHFR基因多态性和血浆总HCY水平.结果 首发精神分裂症患者组TT型、TC型、CC型基因频率分布及T、C等位基因频率分布与对照组比较差异有显著性(x2=8.24,P＜0.05;x2=8.03,P＜0.05).首发精神分裂症组血浆HCY水平[(16.24±7.67)μmol/L]显著高于对照组[(10.41±4.51)μmol/L,P＜0.05];2组中MTHFRTT型、TC型血浆HCY浓度明显高于CC型(P＜0.05).结论 MTHFR基因C677T突变是高血浆同型半胱氨酸血症的原因,两者与精神分裂症的发生有一定关系.     

亚甲基四氢叶酸还原酶基因C677T多态性及同型半胱氨酸与高脂血症的关联性

目的探讨亚甲基四氢叶酸还原酶基因(MTHFR)C677T多态性及血浆同型半胱氨酸（Hcy）水平与高脂血症的关联性。方
法收集1591例研究对象,采用聚合酶链式反应-限制性片段长度多态性（PCR-RFLP）技术检测MTHFR C677T基因多态性,采
用酶循环法检测血浆Hcy,同时检测血脂水平,按血脂水平将研究对象分组,其中高脂血症组694例,健康对照组897例,比较两
组MTHFR C677T基因多态性及血浆Hcy的差异。统计工具采用SPSS17.0统计软件。结果高脂血症组的MTHFR C677T基
因CC、CT、TT三种基因型频率和C、T两种等位基因频率,以及血浆Hcy水平与健康对照组比较差异无显著性意义（P>0.05）。
CC、CT、TT三种不同MTHFR C677T基因型的血浆Hcy水平差异有极显著性意义（P<0.01）,而六种血脂水平差异无显著性意
义（P>0.05）;通过进一步两两比较结果显示,TT基因型的血浆Hcy水平与CC、CT基因型比较差异有极显著性意义（P<0.01）,
TT基因型的血浆Hcy 水平明显高于CC、CT基因型;而CC基因型的血浆Hcy 水平与CT基因型比较差异无显著性意义（P>
0.05）。结论MTHFR C677T基因多态性和血浆Hcy水平两者与高脂血症均不具关联性,而MTHFR C677T基因多态性与血浆
Hcy水平显著相关,TT基因型的血浆Hcy水平明显高于CC、CT基因型。
     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.