重组果糖二磷酸醛缩酶SjLAP和亮氨酸氨基肽酶SjFBPA用于日本血吸虫病的诊断和疗效考核的评价(英文)  

Evaluation of Recombinant SjLAP and SjFBPA in Detecting Antibodies to Schistosoma japonicum

作　　者：Faustina Halm-Lai 罗庆礼[1] 钟政荣[1] 宋晓蓉[1] 陈兆武[1] 王林[1] 胡梅梅[1] 储德勇[1] 沈继龙[1] 

机构地区：[1]安徽病原生物学省级实验室,安徽省人兽共患病重点实验室,安徽医科大学病原生物学教研室,合肥230022 [2]Cape Coast大学微生物学教研室,加纳

出　　处：《中国寄生虫学与寄生虫病杂志》2011年第5期339-347,共9页Chinese Journal of Parasitology and Parasitic Diseases

基　　金：Supported by the National High Technology Research and Development Program of China(863 Program,No.2006AA02A251);the National Natural Science Foundation of China(No.81071376;No.30872209);the Doctoral Fund of Ministry of Education of China(No.200803660003)~~

摘　　要：目的评价重组亮氨酸氨基肽酶(rSjLAP)和重组果糖二磷酸醛缩酶(rSjFBPA)抗原用于诊断人血吸虫感染以及疗效考核的价值。方法异丙基-β-D-硫代半乳糖苷(IPTG)诱导pET-28a-rSjLAP/BL21和pET-28a-rSjFBPA/BL21表达目的蛋白,组氨酸标签亲和纯化柱纯化rSjLAP和rSjFBPA蛋白。88只BALB/c雌性小鼠随机分为4组,A、B和C组(各21只小鼠),D组(25只小鼠)。A、B和C组分别感染5、15和25条日本血吸虫尾蚴。D组为不感染对照组,在实验的第1天全部处死。A、B和C组在感染后第3、7、10、14、20、30和60天,分别处死小鼠3只,采眼球血制备血清,检测其抗体水平。采用单独或联合rSjLAP和rSjFBPA为抗原,ELISA法检测小鼠血清、急性血吸虫病(38份)和慢性血吸虫病患者(96份)血清中的抗体,以健康人(90份)血清为对照,同时检测华支睾吸虫病(33份)、卫氏并殖吸虫病(40份)和钩虫病患者(37份)血清,并检测急性血吸虫病患者吡喹酮治疗(60 mg/kg,2次/d×2 d)后1年的血清(36份)、慢性血吸虫病患者吡喹酮治疗(剂量,疗程同前)后1年(36份)和2年(64份)的血清。结果 BALB/c小鼠在感染后第10天,rSjLAP和rSjFBPA单独或联合使用均可检测到小鼠血清中的IgG抗体;B组(0.535±0.053,0.595±0.033,0.696±0.104)和C组(0.548±0.060,0.608±0.063,0.621±0.090)早期抗体水平明显高于A组(0.415±0.038,0.455±0.056,0.498±0.077)(P<0.05)。用rSjLAP为抗原可检测急性血吸虫病和慢性血吸虫病患者血清,阳性率分别为97.4%(37/38)和87.5%(84/96)(P>0.05);用rSjFBPA为抗原检测,其阳性率分别为94.7%(36/38)和88.5%(85/96)(P>0.05);用rSjLAP和rSjFBPA联合为抗原检测,则其阳性率分别为94.7%(36/38)和85.4%(82/96)(P>0.05)。rSjLAP或联合抗原的特异性均为96.7%(87/90),而rSjFBPA的特异性为97.8%(88/90)。给予吡喹酮治疗后,rSjLAP和rSjFBPA单独或联合使用检测急性血吸虫病血清(0.236±0.212,0.287±0.191,0.235±0.120)和慢性血吸虫病患者(0.266±0.124,0.261±0.14Objective To investigate the early response of immunoglobulin G（IgG） antibody responses to Schistosoma japonicum infection in mice by using the recombinant proteins,S.japonicum leucine aminopeptidase（rSjLAP） and S.japonicum fructose-1,6-bisphosphate aldolase（rSjFBPA）,and evaluate the potential of rSjLAP and rSjFBPA in diagnosis as well as in assessment of therapeutic efficacy in human schistosomiasis.Methods rSjLAP or rSjFBPA was induced from Escherichia coli BL21 strain transfected with the expression vectors,pET-28a-rSjFBPA/BL21 or pET-28a-rSjLAP/BL21 using isopropyl-β-D-thiogalactoside（IPTG）,and purified by Ni-NTA His Bind resin.88 BALB/c female mice,inbred and 6 to 8 weeks old,were randomly divided into 4 groups.Groups A,B and C each made up of 21 mice and group D comprised 25 mice.Groups A,B and C were infected with 5,15 and 25 S.japonicum cercariae respectively.As control,mice in group D were left uninfected.3 mice from each of groups A,B and C were sacrificed and sera collected on days 3,7,10,14,20,30,and 60 post infection.All the 25 mice in group D were sacrificed on the first day of the experiment for serum collection.rSjLAP and rSjFBPA were screened and used in ELISA to test the antibody response of the serum samples.Also,sera of 38 acute patients,96 chronic patients with schistosomiasis japonica,90 healthy donors and patients with other parasite infections including Clonorchis sinensis（33 cases）,Paragonimus westermani（40） and hookworms（37） were tested using the recombinant protein-based ELISA.In addition,36 sera each from the acute and chronic patients 12 months after treatment with praziquantel and 64 of the chronic patients in more than 2 years post-treatment of praziquantel were tested.The dosage of praziquantel for both acute and chronic patients was 60 mg/kg,2 times/d×2 d.Results IgG antibody response was first detected at day 10 post infection by rSjLAP,rSjFBPA or the combined antigen assay.The mean absorbance（A450） on this day were 0.535±0.053,0.595±0.033,0.69

关 键 词：日本血吸虫病 免疫诊断 亮氨酸氨基肽酶 果糖二磷酸醛缩酶 

分 类 号：R383.24[医药卫生—医学寄生虫学]