整联蛋白α4和细胞间黏附分子1基因多态性与克罗恩病发病风险及其临床病理特征的相关性

目的探讨整联蛋白α4(ITGA4)和细胞间黏附分子1(ICAM-1)基因的多态性与克罗恩病(CD)的发病风险及临床病理特征之间的相关性。方法收集2010年1月至2021年1月于温州医科大学附属第二医院消化内科确诊的215例CD患者及性别、年龄相匹配的529名正常对照者。应用基质辅助激光解吸电离-时间飞行质谱技术检测ITGA4(rs6740847、rs7562325)和ICAM-1(rs5498)的基因型。采用Harvey-Bradshaw指数(HBI)评估CD的疾病活动度, 并依据蒙特利尔CD表型分类标准将CD患者分层。采用非条件Logistic回归分析ITGA4(rs6740847、rs7562325)和ICAM-1(rs5498)基因多态性在CD组和正常对照组之间的分布差异及其对CD临床病理特征的影响。结果 CD组ITGA4(rs7562325)的变异等位基因(T)和变异基因型(CT+TT)的频率均高于正常对照组(40.70%vs. 31.57%, P=0.001;62.79%vs. 54.36%, P=0.042)。中重度活动期CD患者ITGA4(rs6740847)的变异等位基...     

功能性主要组织相容性复合体Ⅰ类相关基因A(MICA)-129多态性和血清可溶性MICA水平与溃疡性结肠炎的关系

目的 探讨人类主要组织相容性复合体I类相关基因A(MICA)-129位点多态性及血清可溶性MICA(sMICA)水平与溃疡性结肠炎(UC)的关系.方法 采用聚合酶链反应-直接测序分型(PCR-SBT)方法 检测256例UC患者和460例正常对照者MICA-129的基因多态性;随机选取80例UC患者和90例正常对照者,采用ELISA法测定并比较血清sMICA的浓度差异.结果 UC组的MICA-129的G等位基因和GG基因型频率明显高于正常对照组(76.8%比72.2%,P=0.060;55.9%比46.3%,P=0.016);UC组sMICA水平明显高于正常对照组[(576.47±279.02)ng/L比(182.17±73.11)ng/L,P＜0.001].此外,携带GG基因型的UC患者的sMICA水平明显高于(GA+AA)基因型携带者[(638.87±347.15)ng/L比(507.51±152.87)ng/L,P=0.035].结论 MICA129基因多态性及sMICA水平与UC明显相关,MICA-129基因可能在UC的发病机制中发挥作用.

Abstract：

Objective To investigate the association of the major histocompatibility complex class Ⅰ chain-related antigens A (MICA)-129 gene polymorphism and soluble MICA (sMICA) levels with ulcerative colitis (UC) in Hubei Han nationality. Methods The genetic polymorphism of MICA-129 was examined using a polymerase chain reaction-sequence based test (PCR-SBT) in 256 UC patients and 460 healthy controls. From the above subjects, 80 patients and 90 healthy individuals were randomly selected for determining serum sMICA concentrations by ELISA. Results The frequencies of variant allele (G) and genotype (GG) in MICA-129 gene were significantly higher in the UC patients than in the controls(76. 8%vs 72. 2%, P =0. 060; 55.9% vs 46. 3% ,P =0. 016). Serum sMICA levels were significantly elevated in the patients compared to the controls[(576. 47 ±279. 02) ng/L vs( 182. 17 ±73. 11 ) ng/L,P ＜0. 001]. In addition, the sMICA levels were higher in the patients carrying MICA-129 GG genotypes than in those carrying ( GA + AA) genotypes [( 638. 87 ± 347. 15 ) ng/L vs ( 507. 51 ± 152. 87 ) ng/L, P = 0. 035].Conclusions The genetic polymorphism of MICA-129 and sMICA levels are correlated with the UC patients in Hubei Han nationality. Our findings demonstrate that MICA-129 gene may contribute to the pathogenesis of UC.     

白细胞介素17表达与急性胰腺炎相关性研究

[目的]观察不同程度的急性胰腺炎（AP）大鼠血清及胰腺组织中白细胞介素（IL）17的表达,探讨IL-17和AP炎症程度的相关性及地塞米松对血清IL-17表达的影响。[方法]将54只SD大鼠随机分为3组：重症AP（SAP）组、轻型AP（MAP）组和假手术（SO）组。造模成功后3、6和12h分批处死各组大鼠,解剖观察各组大鼠胰腺组织及有无胸腹水,取胰腺组织行病理学评估;用酶联免疫吸附试验（ELISA）法检测各组大鼠血清和胰腺组织中IL-17的表达水平。另取SD大鼠36只建立SAP模型后,随机分为2组：地塞米松（治疗）组和0.85%氯化钠（对照）组。3、6和12h分批处死大鼠,ELISA法检测各组鼠血清和胰腺组织IL-17表达水平。[结果]①MAP组和SAP组血清及胰腺组织中IL-17表达水平均高于SO组（P〈0.01）;并且SAP大鼠血清及胰腺组织中IL-17表达水平均低于MAP（P〈0.01）。②地塞米松治疗组大鼠血清及组织IL-17表达水平均低于对照组（P〈0.01）。[结论]IL-17的表达水平与AP的严重程度密切相关;地塞米松可以抑制IL-17表达,改善AP的严重程度。     

N-乙酰基转移酶2基因多态性与结肠腺癌易感性的关系

目的探讨N-乙酰基转移酶2(NAT2)基因多态性与结肠腺癌遗传易感性的相关性。方法采用聚合酶链反应-限制性片断长度多态性(PCR-RELP)方法,检测168例结肠腺癌患者及204例健康对照者NAT2基因型和等位基因频率,分析正常人与结肠腺癌患者NAT2各等位基因频率及基因型频率的差异。结果在正常人及结肠腺癌患者中,NAT2各等位基因频率分布差异无统计学意义(P＞0．05)。但与正常对照组相比,结肠腺癌患者中慢型乙酰化基因型频率增高(42．8%比33．7%,P= 0．033,OR=1．576,95%CI：1．037～2．396)。根据不同临床特征分析,慢型乙酰化基因型频率在不同年龄结肠癌患者中差异无统计学意义(P＞0．05),但在远侧结肠癌(P=0．022,OR=2．305,95%CI：1．116～4．763)、Dukes C期(P=0．025,OR=2．065,95%CI：1．089～3．912)、低分化(P=0．031,OR=2．128,95%CI：1．065～4．251)患者中明显增高。结论NAT2慢型乙酰化基因型与结肠腺癌及与肿瘤部位、Dukes分期及分化程度显著相关。     

白细胞介素-10和肿瘤坏死因子基因多态性与湖北汉族人群胃十二指肠疾病及幽门螺杆菌感染的相关性

Objective To study the distribution of IL-10 and TNF gene polymorphisms in patients with gastroduodenal diseases in Hubei Han ethnic and their association with Helicobacter pylori (Hp) infection. Methods Six hundred and five patients with gastroduedenal diseases (196 chronic gastritis, 189 gastroduodenal ulcer and 220 gastric cancer) as well as 624 healthy controls were genotyped with PCR-RFLP method for IL-10-1082,-819,-592 and TNFα-308, lymphotoxin-α (LTα) Nco Ⅰ and AspH Ⅰ gene polymorphisms. Hp infection status was determined with ELLS& Results (1) There was significant difference of IL-10-1082 AG + GG genotype among the gastric cancer group with the non-malignant gastric diseases groups and healthy control group (P <0. 05). There was no significant difference of IL-10-592 and -819 gene polymorphisms among gastric cancer patients,non-malignant gastric disease patients and healthy controls (P>0. 05). The genotype frequencies of IL-10-819 were the same as those of IL-10-592. (2) Frequency of IL-10-1082 AG + GG genotype in gastric cancer patients with positive Hp was significantly higher than that in the other three groups (P < 0. 05). (3) Frequency of LTα Nco I AG genotype in gastric cancer patients with Hp infection was signiilcandy higher than that in Hp positive healthy controls (P < 0. 05). There were no other associations between TNFα-308, LTα Nco Ⅰ and AspH Ⅰ gene polymorphisms and Hp infection in gastroduodenal diseases. Conclusions (1) Allele AG + GG of IL-10-1082 was associated with gastric cancer in Han nationality of Hubei province. (2) IL-10-1082 AG + GG,LTct Nco ⅠAG heterozygous genotype may be associated with Hp infection in patients with gastric cancer in Han nationality of Hubei province.     

白细胞介素-10和肿瘤坏死因子基因多态性与湖北汉族人群胃十二指肠疾病及幽门螺杆菌感染的相关性

Objective To study the distribution of IL-10 and TNF gene polymorphisms in patients with gastroduodenal diseases in Hubei Han ethnic and their association with Helicobacter pylori (Hp) infection. Methods Six hundred and five patients with gastroduedenal diseases (196 chronic gastritis, 189 gastroduodenal ulcer and 220 gastric cancer) as well as 624 healthy controls were genotyped with PCR-RFLP method for IL-10-1082,-819,-592 and TNFα-308, lymphotoxin-α (LTα) Nco Ⅰ and AspH Ⅰ gene polymorphisms. Hp infection status was determined with ELLS& Results (1) There was significant difference of IL-10-1082 AG + GG genotype among the gastric cancer group with the non-malignant gastric diseases groups and healthy control group (P <0. 05). There was no significant difference of IL-10-592 and -819 gene polymorphisms among gastric cancer patients,non-malignant gastric disease patients and healthy controls (P>0. 05). The genotype frequencies of IL-10-819 were the same as those of IL-10-592. (2) Frequency of IL-10-1082 AG + GG genotype in gastric cancer patients with positive Hp was significantly higher than that in the other three groups (P < 0. 05). (3) Frequency of LTα Nco I AG genotype in gastric cancer patients with Hp infection was signiilcandy higher than that in Hp positive healthy controls (P < 0. 05). There were no other associations between TNFα-308, LTα Nco Ⅰ and AspH Ⅰ gene polymorphisms and Hp infection in gastroduodenal diseases. Conclusions (1) Allele AG + GG of IL-10-1082 was associated with gastric cancer in Han nationality of Hubei province. (2) IL-10-1082 AG + GG,LTct Nco ⅠAG heterozygous genotype may be associated with Hp infection in patients with gastric cancer in Han nationality of Hubei province.     

白细胞介素-10和肿瘤坏死因子基因多态性与湖北汉族人群胃十二指肠疾病及幽门螺杆菌感染的相关性

Objective To study the distribution of IL-10 and TNF gene polymorphisms in patients with gastroduodenal diseases in Hubei Han ethnic and their association with Helicobacter pylori (Hp) infection. Methods Six hundred and five patients with gastroduedenal diseases (196 chronic gastritis, 189 gastroduodenal ulcer and 220 gastric cancer) as well as 624 healthy controls were genotyped with PCR-RFLP method for IL-10-1082,-819,-592 and TNFα-308, lymphotoxin-α (LTα) Nco Ⅰ and AspH Ⅰ gene polymorphisms. Hp infection status was determined with ELLS& Results (1) There was significant difference of IL-10-1082 AG + GG genotype among the gastric cancer group with the non-malignant gastric diseases groups and healthy control group (P <0. 05). There was no significant difference of IL-10-592 and -819 gene polymorphisms among gastric cancer patients,non-malignant gastric disease patients and healthy controls (P>0. 05). The genotype frequencies of IL-10-819 were the same as those of IL-10-592. (2) Frequency of IL-10-1082 AG + GG genotype in gastric cancer patients with positive Hp was significantly higher than that in the other three groups (P < 0. 05). (3) Frequency of LTα Nco I AG genotype in gastric cancer patients with Hp infection was signiilcandy higher than that in Hp positive healthy controls (P < 0. 05). There were no other associations between TNFα-308, LTα Nco Ⅰ and AspH Ⅰ gene polymorphisms and Hp infection in gastroduodenal diseases. Conclusions (1) Allele AG + GG of IL-10-1082 was associated with gastric cancer in Han nationality of Hubei province. (2) IL-10-1082 AG + GG,LTct Nco ⅠAG heterozygous genotype may be associated with Hp infection in patients with gastric cancer in Han nationality of Hubei province.     

溃疡性结肠炎患者的分泌型状态与易感性的相关性研究

目的探讨浙江汉族人群中溃疡性结肠炎患者的分泌型状态与其易感性的相关性。方法搜集160例溃疡性结肠炎患者为研究组,187例健康体检者为对照组,采集两组外周静脉血后,采用直接测序法检测岩藻糖基转移酶FUT2基因上(rs1047781,A385T)和(rs601338,G428A)两个位点的单核苷酸多态性,并分析FUT2基因A385T和G428A位点与溃疡性结肠炎患者临床病理特征的关系。结果 FUT2基因A385T和G428A位点在对照组中的基因型分布均符合Hardy-Weinberg平衡,最小等位基因频率分别是43.58%和0.27%。在溃疡性结肠炎组和对照组之间,FUT2基因A385T和G428A位点的突变等位基因和基因型频率比较,差异无统计学意义(χ2分别=0.14、1.35;0.02、1.36,P均>0.05)。进一步分层分析发现,在具有不同临床病理特征的溃疡性结肠炎患者中,FUT2基因A385T和G428A位点的等位基因和基因型频率的差异均无统计学意义(χ2分别=0.16、1.35;0.01、1.34;1.11、0.57;0.60、0.56,P均>0.05)。此外,在所有研究对象中均未发现导致欧美人群非分泌型状态的G428A纯合型突变。结论 FUT2基因多态性决定的分泌型状态与浙江汉族人群溃疡性结肠炎的易感性无关。     

葡聚糖硫酸钠诱导的结肠炎小鼠中TRAIL-R基因敲除对Th17细胞凋亡的影响

目的：采用葡聚糖硫酸钠（DSS）构建实验性结肠炎小鼠模型,探讨肿瘤坏死因子相关凋亡诱导配体（TRAIL）的受体基因敲除（TRAIL -R -/-）对结肠炎症及Th17细胞凋亡的影响。方法：将C57BL/6品系小鼠分为4组：TRAIL -R -/-结肠炎组、TRAIL -R -/-对照组、野生型（WT）结肠炎组、WT对照组,每组各9只。结肠炎组饮用3.5%的DSS,对照组饮用清水。7 d后,从临床表现和组织病理学上评估小鼠结肠炎的严重程度。取外周血单个核细胞（PBMCs）和结肠黏膜固有层单个核细胞（LPMCs）,采用流式细胞术检测Th17细胞占CD4+T细胞的比例,采用实时荧光定量聚合酶链反应（RT-qPCR）、Western blot和酶联免疫吸附测定（ELISA）检测视黄酸相关孤儿受体（ROR-γt）和IL-17A的mRNA和蛋白表达水平。采用TUNEL荧光染色技术及激光共聚焦显微镜观察结肠组织中Th17细胞的凋亡率。通过比色法检测结肠组织中凋亡蛋白酶Caspase 3、Caspase 8和Caspase 9的活性。结果：DSS诱导后,TRAIL -R -/-小鼠较WT小鼠发生了更为严重的结肠炎。TRAIL -R -/-结肠炎小鼠PBMCs中Th17 细胞的比例（P ＜0.01）,以及ROR-γt和IL-17A的mRNA和蛋白表达水平均显著高于WT结肠炎小鼠（均P ＜0.05）。TRAIL -R -/-结肠炎小鼠LPMCs中Th17细胞的比例（P ＜0.01）,以及ROR-γt和IL-17A的mRNA和蛋白表达水平均显著高于WT结肠炎小鼠（均P ＜0.05）。与WT结肠炎小鼠相比,TRAIL -R -/-结肠炎小鼠的结肠组织中Th17细胞的凋亡率（P ＜0.01）以及Caspase 3和Caspase 8的酶活性均显著降低（均P ＜0.01）。结论：DSS诱导后,TRAIL -R -/-小鼠的结肠炎症较WT小鼠更为严重,原因可能是Th17细胞凋亡减少,其数目和活性增高所致。     

白细胞介素-10和肿瘤坏死因子基因多态性与湖北汉族人群胃十二指肠疾病及幽门螺杆菌感染的相关性

Objective To study the distribution of IL-10 and TNF gene polymorphisms in patients with gastroduodenal diseases in Hubei Han ethnic and their association with Helicobacter pylori (Hp) infection. Methods Six hundred and five patients with gastroduedenal diseases (196 chronic gastritis, 189 gastroduodenal ulcer and 220 gastric cancer) as well as 624 healthy controls were genotyped with PCR-RFLP method for IL-10-1082,-819,-592 and TNFα-308, lymphotoxin-α (LTα) Nco Ⅰ and AspH Ⅰ gene polymorphisms. Hp infection status was determined with ELLS& Results (1) There was significant difference of IL-10-1082 AG + GG genotype among the gastric cancer group with the non-malignant gastric diseases groups and healthy control group (P <0. 05). There was no significant difference of IL-10-592 and -819 gene polymorphisms among gastric cancer patients,non-malignant gastric disease patients and healthy controls (P>0. 05). The genotype frequencies of IL-10-819 were the same as those of IL-10-592. (2) Frequency of IL-10-1082 AG + GG genotype in gastric cancer patients with positive Hp was significantly higher than that in the other three groups (P < 0. 05). (3) Frequency of LTα Nco I AG genotype in gastric cancer patients with Hp infection was signiilcandy higher than that in Hp positive healthy controls (P < 0. 05). There were no other associations between TNFα-308, LTα Nco Ⅰ and AspH Ⅰ gene polymorphisms and Hp infection in gastroduodenal diseases. Conclusions (1) Allele AG + GG of IL-10-1082 was associated with gastric cancer in Han nationality of Hubei province. (2) IL-10-1082 AG + GG,LTct Nco ⅠAG heterozygous genotype may be associated with Hp infection in patients with gastric cancer in Han nationality of Hubei province.