乙型肝炎病毒基因型与YMDD基因区序列突变及BCP突变关系探讨

目的 对湘潭地区HBV感染者的基因型、YMDD基因区序列突变及BCP区突变情况进行研究,并对三者之间的关系进行探讨.方法 针对湘潭地区952例不同类型的HBV感染者的样本同时进行基因型、YMDD基因区序列突变及BCP区突变检测,并对检测结果进行统计分析.结果 湘潭地区HBV各种基因型分布比例为:B型698例、占73.32%,C型115例、占12.08%,B、C型混合感染139例、占14.60%.YMDD基因区序列突变结果显示:YMDD野生型844例、占88.66%,其余为YMDD突变型,其中YVDD 54例、占5.67%,YIDD 53例、占5.57%,1例为YMDD与YVDD混合感染.BCP区突变结果显示:1762A/1764G(野生型)672例、占70.59%,1762T/1764A(突变型)188例、占19.75%,其余92例为1762T/1764A和1762A/1764G混合型、占9.66%.基因型、YMDD基因区序列突变及BCP区突变三者相关性分析显示:HBV B型和C型YMDD基因区序列突变率分别为10.04%、10.43%,差异无统计学意义(χ2=0.017,P＞0.05),HBV B型和C型YMDD基因区序列突变类别差异有统计学意义(χ2=4.836,P＜0.05),HBV C型YVDD突变率(9.57%)要高于B型(5.88%).HBV B型和C型BCP区突变率分别为27.36%、46.09%,差异有统计学意义(χ2=16.478,P＜0.01),C型BCP区突变率要高于B型.HBV YMDD野生型和突变型的BCP区突变率分别为2 8.67%、35.51%,差异无统计学意义(χ2=2.139,P＞0.05),但YVDD BCP区突变率(61.11%)要高于其他类别.结论 (1)湘潭地区流行的HBV基因型主要为B型和C型,其中B型为优势基因型,具有南方地区的特点.(2)拉米夫定治疗前通过HBV基因型检测来预测抗病毒应答可能并无实际意义.(3)HBV基因分型、YMDD基因区序列突变、BCP区突变检测的应用,将有助于临床上对乙肝患者的预后和转归进行正确评价,为及时合理的实施干预措施提供了重要依据.

Abstract：

Objective To investigate the relationship between HBV genotypes and YMDD motif mutations or BCP mutations in Xiangtan of Hunan Province. Methods HBV genotypes, YMDD motif mutations and BCP mutations were analyzed in 952 HBV infected patients. Results HBV genotyping showed that 698 HBV type B patients and 115 HBV type C patients accounted for 73.32% and 12.08% respectively of all the participants. The rest 139( 14.60% )were genotype B and C mixed infection( B + C ). The analysis of YMDD motif mutations showed that 844 YMDD wild-type which accounted for 88.66% of all the subjects and the remainder were YMDD mutation types, of which 54( 5.67% ) carried YVDD, 53( 5.57% ) YIDD,and 1 YVDD and YIDD mixed infection. Basic Core Promoter mutations showed that 1762A/1764G ( wild type )accounted for 70.59% and 1762T/1764A( mutant ) accounted for 19.75%. The rest 92 patients were 1762T/1764A and 1762A/1764G mixed infection. This study showed no significant difference in the rate of YMDD mutation( 10.04% vs 10.43% ,χ2 =0.017,P＞0.05 ) ,but a significant difference in the types of YMDD mutation(χ2 = 4.836, P ＜ 0.05 )between HBV types B and C. The YVDD mutation was more commonly seen in genotype C( 9.57% ) than in genotype B( 5.88% ). The BCP mutation rate showed a significant difference( 27.36% vs 46.09%, χ2 = 16.478, P ＜ 0.01 ). Genotype C was more frequent than genotype B. The BCP mutation rate showed no significant difference between YMDD Wild-type and YMDD mutation types( 28.67% vs 35.51%, χ2 = 2.139, P ＞ 0.05 ), but most of BCP mutations happened in YVDD mutant type( 61.11% ). Conclusions ( 1 ) The predominant HBV genotypes in Xiangtan were genotype B and genotype C, the major genotype was type B, which display the characteristics of epidemiology in Southern China. ( 2 ) Determination of HBV genotypes before lamivudine therapy was probably not an important pretreatment investigation to predict antiviral responses. ( 3 ) Detection of HBV genotypes, YMDD motif mutations and BCP mutations will contribute to the correct evaluation of prognosis and timely proper management of HBV patients.     

TCA/丙酮沉淀对尿液标本中微量蛋白效果分析

目的对TCA/丙酮沉淀法对尿液标本中的微量蛋白进行测量的效果进行分析。方法采用随机抽样的方法,抽取2007年9月～2010年9月就诊的进行尿液标本检测的患者90例,再将其随机分为A、B、C3组,平均每组30例。A组采用丙酮沉淀法对微量蛋白进行测定;B组患者采用CAN/TFA沉淀法对微量蛋白进行测定;C组患者采用TCA/丙酮沉淀法对微量蛋白进行测定。对三组的测量结果进行比较分析。结果分析结果表明,C组患者的蛋白回收率和所得蛋白点数均值都明显高于其他两组患者,差异有显著的统计学意义（P〈0.01）;A组患者的蛋白回收率和所得蛋白点数均值都明显低于其他两组患者,有显著的统计学意义（P〈0.01）。结论采用TCA/丙酮沉淀法对尿液微量蛋白含量进行测量的效果比较理想,具有操作简单、高效等特点,可以作为临床对患者进行尿液微量蛋白测量的首选方法,值得进一步推广。     

湘潭地区乙型肝炎病毒基因型与YMDD基因区序列突变及BCP区突变关系探讨

【目的】对湘潭地区HBV感染者的基因型、YMDD基因区序列突变及BCP区突变情况及关系进行探讨。【方法】对952例不同类型的HBV感染者的样本同时进行基因型、YMDD基因区序列突变及BCP区突变检测和分析。【结果】湘潭地区HBV各种基因型分布比例为：B型占73．32％,C型占12．08％,B、C型混合感染14．60％。YMDD基因区序列突变结果显示：YMDD野生型,占88．66％,其余为YMDD突变型。BCP区突变结果显示：1762A／1764G（野生型）占70．59％,1762T／1764A（突变型）占19．75％,其余为混合型。基因型、相关性分析显示：HBVB型和C型YMDD基因区序列突变率无显著性差异（P〉0．05）,序列突变类别存在显著性差异（P〈0．05）,HBVC型YVDD突变率要高于B型。C型BCP区突变率要高于B型（P〈0．01）。HBV YMDD野生型和突变型的BCP区突变率存在显著性差异（P〈0．01）,HBV YMDD突变型标本BCP区突变率与YMDD野生型相比无差异,但YVDDBCP区突变率要高于其他类别。【结论】①湘潭地区流行的HBV基因型主要为B型和C型,其中B型为优势基因型,具有南方地区的特点。②拉米夫定治疗前通过HBV基因型检测来预测抗病毒应答可能并无实际意义。③HBV基因分型、YMDD基因区序列突变、BCP区突变检测的应用,将有助于临床上对乙肝患者的预后和转归进行正确评价。