WO2012130143A1 - 一种抗体组合物及其应用 - Google Patents

一种抗体组合物及其应用 Download PDF

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Publication number
WO2012130143A1
WO2012130143A1 PCT/CN2012/073222 CN2012073222W WO2012130143A1 WO 2012130143 A1 WO2012130143 A1 WO 2012130143A1 CN 2012073222 W CN2012073222 W CN 2012073222W WO 2012130143 A1 WO2012130143 A1 WO 2012130143A1
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antibody
specific antibody
rejection
acute rejection
mig
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PCT/CN2012/073222
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English (en)
French (fr)
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陈江华
彭文翰
茅幼英
寿张飞
姜虹
陈大进
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浙江大学医学院附属第一医院
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Publication of WO2012130143A1 publication Critical patent/WO2012130143A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/68Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
    • G01N33/6893Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids related to diseases not provided for elsewhere
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2800/00Detection or diagnosis of diseases
    • G01N2800/24Immunology or allergic disorders
    • G01N2800/245Transplantation related diseases, e.g. graft versus host disease

Definitions

  • the present invention is in the field of biotechnology, and relates to an antibody composition and use thereof, and more particularly to an antibody composition useful for preparing a renal transplant acute rejection reaction and differential diagnostic reagent and use thereof.
  • Kidney transplantation is the ideal kidney replacement therapy for end-stage renal disease. With the advancement of transplantation techniques and the application of new immunosuppressive agents, the survival rate of human and kidney after renal transplantation has been greatly improved, but rejection after renal transplantation is still the main factor affecting the prognosis of renal transplantation. It is also significantly associated with long-term survival rates in transplanted kidneys and transplant recipients.
  • the diagnosis is often after the obvious graft injury, and can not guide the clinician anti-rejection treatment early; the third pathological examination is more difficult to predict anti-rejection Rejection treatment response can not effectively predict the long-term survival of the graft; in addition, biopsy specimens still have representative problems, and the local tissue of the puncture sometimes does not represent the state of the whole graft well.
  • Hu et al (American Journal of Transplantation 2004; 4: 432-437) studied 44 cases of acute renal dysfunction (28 cases of acute rejection, 10 cases of acute tubular necrosis and 6 cases of BK virus nephropathy), 20 cases of chronic allograft rejection, Twenty-six patients with stable renal function in urine Mig showed that the sensitivity and specificity of Mig in distinguishing between acute renal dysfunction and chronic rejection and renal function stability were 79.5% and 93.5%, respectively.
  • Hu et al Transplantation 2009; 87: 1814-1820
  • Later studies also confirmed the sensitivity and specificity of urine Mig in the diagnosis of renal allograft injury (including acute rejection, acute tubular necrosis, BK virus nephropathy and chronic allograft nephropathy).
  • BLC is a B lymphocyte-specific chemokine, also known as CXCL13, BCA1. It has been reported that acute renal allograft rejection has BLC-positive B cell infiltration in immunohistochemical staining of renal interstitial, but there is no urine BLC cell yet. Factor content is used to identify reports of acute rejection categories (cell rejection or antibody-mediated rejection). The current identification of the type of diagnosis and rejection of acute rejection (cell rejection or antibody-mediated rejection) relies solely on renal biopsy, which has limitations and traumatic disadvantages. Therefore, the use of non-invasive techniques, combined with multiple cytokines in urine to achieve non-invasive diagnosis of acute rejection and rejection types is of great significance. Summary of the invention
  • a further object of the invention is to provide a kit comprising the antibody composition.
  • a further object of the present invention is to provide a method for diagnosing acute rejection of renal transplantation and/or identifying types of acute rejection of renal transplantation by the antibody composition of the present invention.
  • An antibody composition comprising a BLC-specific antibody.
  • An antibody composition comprising a Fractalkine specific antibody, a Mig specific antibody, and a C4d specific antibody, and further comprising a Granzyme B specific antibody based on the three specific antibodies.
  • An antibody composition comprising a BLC-specific antibody, a Fractalkine specific antibody, a Mig-specific antibody, and a C4d-specific antibody.
  • An antibody composition comprising a BLC-specific antibody, a Fractalkine-specific antibody, a Mig-specific antibody, a Granzyme B-specific antibody, and a C4d-specific antibody.
  • the specific antibody is a monoclonal antibody, a polyclonal antibody, a recombinant antibody or an antibody fragment.
  • the specific antibody is preferably a monoclonal antibody.
  • composition comprising a Fractalkine specific antibody, a Mig specific antibody and a C4d specific antibody composition for preparing a renal transplant acute rejection diagnostic reagent.
  • composition comprising a Fractalkine specific antibody, a Mig specific antibody, a Granzyme B specific antibody and a C4d specific antibody composition for preparing a renal transplant acute rejection diagnostic reagent.
  • BLC-specific antibody a Fractalkine-specific antibody, a Mig-specific antibody, a Granzyme B-specific antibody, and a C4d specific antibody composition for the preparation of a renal transplant acute rejection diagnostic reagent and/or a renal transplant acute rejection type identification reagent.
  • a kit comprising an antibody composition, wherein the antibody composition is a BLC-specific antibody.
  • a kit containing an antibody composition which is a Fractalkine specific antibody, a Mig specific antibody, a Granzyme B specific antibody, and a C4d specific antibody.
  • a kit comprising an antibody composition, wherein the antibody composition is a BLC-specific antibody, a Fractalkine-specific antibody, a Mig-specific antibody, and a C4d-specific antibody.
  • a kit comprising an antibody composition, wherein the antibody composition is a BLC-specific antibody, a Fractalkine-specific antibody, a Mig-specific antibody, a Granzyme B-specific antibody, and a C4d-specific antibody.
  • the kit of the above antibody composition is prepared and measured by ELISA, radioimmunoassay, automated immunoassay, immunoprecipitation, flow microbead assay or liquid chip technology (LUMINEX) platform.
  • a method for diagnosing acute rejection of a kidney transplant comprising: an antibody composition of the present invention, that is, a composition of a Fractalkine-specific antibody, a Mig-specific antibody, and a C4d-specific antibody, or a Fractalkine-specific antibody, a Mig-specific antibody, a Granzyme B-specific antibody, and
  • the composition of the C4d specific antibody detects the concentration of the cytokines Fractalkine, Mig and C4d in the urine sample of the subject, or the concentrations of the cytokines Fractalkine, Mig, Granzyme B and C4d, thereby diagnosing the acute renal transplantation according to the concentration of each factor Rejection.
  • a method for identifying a type of acute rejection of a kidney transplant comprising: detecting a concentration of a cytokine BLC in a urine sample of a subject by a BLC-specific antibody, thereby identifying a type of acute rejection of the kidney transplant according to the concentration.
  • the invention combines the specific antibodies of three cytokines such as Fractalkine, Mig and C4d, and the urinary analysis of 81 cases of acute rejection and 167 cases of renal function stability can diagnose acute rejection, and the sensitivity and specificity reach 91.4%, 90.4 respectively.
  • the specific antibodies of four cytokines such as Fractalkine, Mig, Granzyme B and C4d
  • the sensitivity and specificity for the diagnosis of acute rejection reached 95.1% and 84.4%, respectively.
  • the large sample size and the sensitivity specific result enable the technical solution of the present invention to meet the requirements of clinical diagnosis, and can be further used for preparing a diagnostic reagent for acute renal rejection, so that the present invention overcomes the prior art single cytokine diagnostic reagent.
  • the sensitivity and specificity are low, and it is difficult to meet the defects of clinical diagnosis requirements.
  • the inventors had 81 cases of acute rejection, of which 28 were antibody-mediated rejection and 53 were T cell-mediated rejection.
  • BLC can identify cell rejection and antibody-mediated rejection well, sensitivity and specificity, respectively.
  • BLC cytokines were able to identify acute rejection categories (cell rejection or antibody-mediated rejection).
  • the present inventors further combine an antibody composition of a Fractalkine-specific antibody, a Mig-specific antibody, a C4d-specific antibody, and a BLC-specific antibody, and the antibody composition can be used for the diagnosis of acute rejection at one time, and the type of acute rejection can be accurately diagnosed as a cell type. Rejection or antibody-mediated rejection.
  • an antibody composition of a Fractalkine-specific antibody, a Mig-specific antibody, a Granzyme B-specific antibody, a C4d-specific antibody, and a BLC-specific antibody may be combined.
  • the detection reagent prepared by using the antibody composition overcomes the shortcomings of the current diagnosis of the acute rejection category and is limited to renal biopsy, and provides a non-invasive method for clinical diagnosis of acute renal rejection and renal acute rejection.
  • the invention also provides a method of preparing a kit which can be prepared and assayed by ELISA (Enzyme Linked Immunosorbent Assay), Radioimmunoassay, Automated Immunoassay, Immunoprecipitation, Flow Microbead Assay or Liquid Chip Technology (LUMINEX) platform. It is preferably prepared by a liquid chip technology platform. Luminex is a new high-throughput detection technology for biomolecules. It is also the only biochip platform approved by authorities and FDA for clinical diagnostic applications. It has higher sensitivity and high throughput than traditional ELISA. Advantages, the antibody composition of the present invention can be further improved in sensitivity and specificity by preparing a kit using a liquid chip technology (LUMINEX) platform. detailed description
  • Example 1 Fractalkine, Mig, Granzyme B, C4d alone and in combination to diagnose acute rejection of renal transplantation
  • ELISA kit for the determination of each cytokine was purchased from the company and the article number: Mig (R&D Systems, DCX900), Fractalkine (R&D Systems, DY365), Granzyme B (Bender MedSy stems, BMS202), C4d
  • the subjects of this study were: 167 non-rejected, 81 cases of acute rejection of urine samples, urine samples were from the transplanted specimen library of the Kidney Disease Center of the First affiliated Hospital of Zhejiang University. Principles for the retention of urine specimens: Morning urine was collected at 2, 4, 6, and 8 weeks after transplantation and all postoperative follow-up; all transplanted kidney biopsy specimens were taken immediately before biopsy. The collected urine specimens should be stored in an 80 °C low temperature refrigerator as soon as possible.
  • the ELISA assay is performed according to the kit instructions.
  • Renal biopsy is diagnosed according to the Banff 2003 standard.
  • the result is larger than cutoff, the sensitivity of diagnosis of acute rejection is smaller and the specificity is larger.
  • the diagnosis of acute rejection is diagnosed.
  • the greater the sensitivity the smaller the specificity. That is, the greater the test result than the cutoff, the greater the probability of acute rejection due to kidney transplantation; the smaller the test result is than the cutoff, the less likely the renal transplant will lead to acute rejection (conclusion).
  • the sensitivity and specificity of the three cytokines combined with Fractalkine, Mig and C4d for the diagnosis of acute rejection were 91.4% and 90.4%, respectively.
  • Each ELISA kit was purchased from the company and article number: Mig (R&D Systems, DCX900), Fractalkine (R&D Systems, DY365), C4d (QUIDEL, A008), BLC (R&D Systems, DCX130).
  • the subjects of the study were: 167 non-rejected, 81 cases of acute rejection of urine samples, including 28 antibody-mediated rejection, 53 T-cell-mediated rejection, and urine specimens from the affiliated to Zhejiang University School of Medicine.
  • the ELISA assay is performed according to the kit instructions.
  • Renal biopsy is diagnosed according to the Banff 2003 standard.
  • the urine measurement values of 167 non-rejection and 81 acute rejection patients were introduced into SPSS 11.5, and the ROC statistical method was selected to be positive for acute rejection.
  • the sensitivity and specificity of the three cytokines combined with Fractalkine, Mig and C4d for acute rejection were 91.4% and 90.4%, respectively.
  • the sensitivity of diagnosis of acute rejection is smaller and the specificity is greater; when the result is smaller than cutoff, the diagnosis of acute rejection is The greater the sensitivity, the smaller the specificity. That is, the greater the test result than the cutoff, the greater the probability of acute rejection due to kidney transplantation; the smaller the test result is than the cutoff, the less likely the renal transplant will lead to acute rejection (conclusion).
  • Example 3 Combining Fractalkine, Mig, Granzyme B, C4d and BLC 5 cytokines to diagnose acute renal allograft rejection and identify rejection types
  • Each ELISA kit is purchased from the company and its number: Mig (R&D Systems, DCX900), Fractalkine (R&D Systems, DY365), Granzyme B (Bender MedSystems, BMS202), C4d (QUIDEL, A008), BLC (R&D Systems, DCX130).
  • the subjects of the study were: 167 non-rejected, 81 cases of acute rejection of urine samples, including 28 antibody-mediated rejection, 53 T-cell-mediated rejection, and urine specimens from the affiliated to Zhejiang University School of Medicine.
  • the ELISA assay is performed according to the kit instructions.
  • Renal biopsy is diagnosed according to the Banff 2003 standard.
  • the urine measurement values of 167 non-rejected and 81 acute rejection patients were introduced into SPSS 11.5, and the ROC statistical method was selected to be positive for acute rejection.
  • the sensitivity and specificity of the four cytokines combined with Fractalkine, Mig, C4d and Granzyme B for the diagnosis of acute rejection were 95.1% and 84.4%, respectively.
  • the result is larger than cutoff the sensitivity of diagnosis of acute rejection is smaller and the specificity is larger.
  • the diagnosis of acute rejection is diagnosed.
  • the greater the sensitivity the smaller the specificity. That is, the greater the detection result than the cutoff, the greater the probability of acute rejection caused by kidney transplantation; the smaller the detection result is than the cutoff, the smaller the probability of acute rejection caused by kidney transplantation.
  • the sensitivity of the diagnostic antibody-mediated rejection is smaller, the specificity is greater, and the T cell
  • the greater the specificity when the result is smaller than the cutoff, the greater the sensitivity of the diagnostic antibody-mediated rejection, the smaller the specificity, and the greater the sensitivity of T cell-mediated rejection.
  • the smaller the specificity That is, the greater the detection result than the cutoff, the greater the probability of identification of antibody-mediated rejection; the smaller the detection result than the cutoff, the smaller the probability of identifying antibody-mediated rejection.
  • Example 4 Preparation of kits containing four monoclonal antibodies, Fractalkine, Mig, C4d and BLC Preparation of antibody microbeads in the kit: (Step 10 Adjust the addition and subtraction of the corresponding monoclonal antibody to develop a kit for the corresponding cytokine, and other components in the kit can be purchased commercially or by conventional techniques).
  • (10 X ) means a concentrate of 10 times concentration.
  • the antibody is first diluted with biotin dilution, 50ul 4ug/ml biotinylated Mig antibody (Cat.no BAF392, R&D systems, USA), C4d antibody (Cat.no ab48345, Abeam), Fractalkine antibody
  • Streptavidin-RPE concentrate was diluted with Streptavidin-RPE dilution, and 50 ⁇ l of diluted Stretavidin-RPE ( I X ), (Cat.no 405203, Biolegend, USA) was added to each well, and gently mixed;
  • test results are imported into the Luminex analysis software, and the software instructions are used to determine the content of each factor in the urine. (The result given by Luminex is the content of each factor), and then the SPSS statistical analysis is used to judge the result.
  • Luminex is the content of each factor
  • SPSS statistical analysis is used to judge the result.
  • Subjects were recipients of renal transplantation, and had a clear pathological diagnosis, 30 patients with stable renal function (no-AR), 30 patients with acute rejection, and 20 patients with cellular rejection (TMR). Mediated rejection
  • the test sample is the urine sample lml of the above recipients, and the creatinine concentration in the urine is measured by a biochemical analyzer.
  • Fractalkine can detect concentrations of 0-10ng/ml, Mig is 0-2000pg/ml, C4d is 0-0.4ug/ml, BLC is 0-500pg/mlo
  • the cutoff value of AR and B no-AR is divided into another: jr: Fractalkine is 300 ng/mmol creatinine, Mig is 1.5 ng/mmol creatinine, and C4d is 0.6 ug/mmol creatinine.
  • Acute renal allograft rejection in recipients after renal transplantation was measured using a diagnostic kit for acute rejection of transplanted kidneys based on the luminex platform in conjunction with Fractalkine, Mig and C4d.
  • the kit was prepared in the same manner as in Example 4, except that the added antibodies were Fractalkine, Mig and C4d monoclonal antibodies, and the number of microbeads was 3, and the amount of each monoclonal antibody was 50 ug/ml 10 uL 1.
  • the subject was subjected to renal transplantation. And have a clear pathological diagnosis, 30 cases of transplanted renal function stabilization (no-AR), and 30 cases of acute rejection (AR).
  • the test sample is 1 ml of the urine sample of the above recipient, and the creatinine concentration in the urine is measured by a biochemical analyzer. According to the kit instructions, the analysis criteria are the same as in the fourth embodiment.
  • Fractalkine can detect concentrations of 0-10ng/ml, Mig is 0-2000pg/ml, and C4d is 0-0.4ug/ml.
  • the cutoff values for distinguishing AR and B no-AR are: Fractalkine is 298ng/mmol creatinine, Mig is
  • C4d was 0.58 ug/mmol creatinine.

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Description

一种抗体组合物及其应用 技术领域
本发明属于生物技术领域,涉及一种抗体组合物及其应用,特别涉及可用于制备肾移 植急性排斥反应诊断和鉴别诊断试剂的抗体组合物及其应用。
背景技术
肾脏移植是治疗终末期肾病最理想的肾脏替代疗法。随着移植手术技术的进步和新型 免疫抑制剂的应用, 肾移植术后人和肾的存活率都有了很大的提高,但肾移植后的排斥反 应仍然是影响肾移植预后的主要因素, 并与移植肾和移植受者的长期存活率明显相关。
排斥反应的诊断主要依靠肾组织病理活检,然而目前的病理活检还存在很多问题,首 先它是有创性检查, 不可避免存在活检相关并发症(如出血、 移植物破裂) 的危险, 无法 在短期内反复检查, 也无法在门诊动态观察随访, 而且随着移植术后的时间延长, 为了监 测移植受者的免疫状态的变化,需要定期的程序活检,但活检的费用和移植受者的接受程 度也制约活检的开展;其次目前的移植病理缺乏敏感的手段发现早期的急性排斥,诊断往 往是在出现明显的移植物损伤后,不能早期指导临床医生抗排斥治疗;第三病理检查较难 预测抗排斥治疗的反应,不能有效预测移植物的长期存活; 另外活检标本还存在代表性问 题, 穿刺局部的组织有时候并不能很好的代表整个移植物的状态。
正是由于目前的病理活检还无法满足临床医生的要求,寻求无创性检查来辅助移植物 功能监测, 对病理活检进行补充, 尿液检查无疑是监测移植肾功能较好的选择, 近年来尿 蛋白组学研究发现正常尿蛋白除了 30%来自血浆蛋白, 其余 70%均来自肾脏本身, 能够 很好的反映肾脏的病理生理过程,在生理性和病理性刺激下, 肾小球和肾小管相应作出反 应, 引起尿蛋白排出的变化。
如果通过尿液就可以无创性诊断移植肾排斥并区分排斥类型,从而取代病理活检将具 有极大的应用前景,已有一些较少样本的研究显示了尿液细胞因子检测诊断急性排斥的可 能。 本发明人对 67例急性排斥和 119例肾功能稳定者的尿液细胞因子的分析的前期结果 显示, Fractalkine 诊断急性排斥的敏感性和特异性分别为 82.1%和 76.5% (Peng WH et a Kidney International 2008 74, 1454-1460)。 Granzyme B诊断急性排斥的敏感性和特异性分 别为 59.7%禾口 91.6%。 Hu等 (American Journal of Transplantation 2004; 4: 432-437 ) 研究 针对 44例急性肾功能障碍(28例急性排斥, 10例急性肾小管坏死和 6例 BK病毒肾病), 20例慢性移植肾排斥, 26例肾功能稳定的尿液 Mig测定分析显示, Mig区分急性肾功能 障碍和慢性排斥、 肾功能稳定者的敏感性和特异性分别为 79.5%和 93.5%。 Hu 等 ( Transplantation 2009;87: 1814-1820 ) 后来的研究同样证实尿液 Mig诊断移植肾肾损伤 (包括急性排斥, 急性肾小管坏死, BK病毒肾病和慢性移植肾肾病) 的敏感性和特异性 分别为 85.2%和 89.7%。 但是 Hu等的研究说明尿液 Mig可诊断移植肾功能障碍, 并没有 特异性针对急性排斥的诊断结果。 Ingeborg A. Hauser等 (J Am Soc Nephrol 16: 1849-1858, 2005 ) 对 54例正常肾功能者和 15例急性排斥者的研究显示尿液 Mig可预测急性排斥, 具有较好的诊断价值,但是该研究样本量少,只纳入了 15例急性排斥者。 Stephan R. Lederer 等 Nephron Clin Pract 2003;94:cl9-c26 ) 等研究显示急性排斥和慢性移植肾失功时尿液 C4d含量较正常者显著升高, 尿液 C4d分泌有可能成为诊断急性排斥的指标。
从以上这些已有研究结果可见,利用尿液单个指标来诊断急性排斥,不能同时保证较 好的敏感性和特异性; 同时, 目前的研究结果大都源于少量的研究样本, 这样的研究结论 因样本量少而使其结果具有很多的不确定因素, 因此更适合于作为理论研究而使用,其与 真正的应用于临床诊断还有较大的距离, 无法应用于临床诊断。
BLC是 B淋巴细胞特异性趋化因子, 又称为 CXCL13 , BCA1 , 已有研究报道移植肾 急性排斥时, 免疫组化染色肾间质有 BLC阳性 B细胞浸润, 但目前尚未有尿液 BLC细 胞因子含量用于鉴别急性排斥类别(细胞性排斥还是抗体介导的排斥)的相关报道。 目前 对于急性排斥的诊断和排斥类型(细胞性排斥还是抗体介导的排斥)的鉴别仅依赖于肾组 织活检, 而上所述活检具有局限性和创伤性的缺点。 因此利用无创性技术手段, 联合尿液 多个细胞因子达到急性排斥和排斥类型的无创性诊断具有非常重大的意义。 发明内容
本发明的目的是提供一种可用于制备无创性肾急性排斥反应诊断试剂和 /或肾移植急 性排斥类型鉴别试剂的抗体组合物。 本发明的另一目的是提供该抗体组合物的应用。
本发明的又一目的是提供含有该抗体组合物的试剂盒。
本发明的又一目的是提供制备含有该抗体组合物的试剂盒的方法。
本发明的再一目的是提供通过本发明的抗体组合物诊断肾移植急性排斥反应和 /或鉴 别肾移植急性排斥类型的方法。
本发明的目的可通过如下技术方案实现:
一种抗体组合物, 含有 BLC特异抗体。
一种抗体组合物, 含有 Fractalkine特异抗体、 Mig特异抗体及 C4d特异抗体, 在这 三个特异抗体的基础上还可包含 Granzyme B特异抗体。
一种抗体组合物, 含有 BLC特异抗体、 Fractalkine特异抗体、 Mig特异抗体及 C4d 特异抗体。
一种抗体组合物,含有 BLC特异抗体、 Fractalkine特异抗体、 Mig特异抗体、 Granzyme B特异抗体及 C4d特异抗体。
所述的特异抗体为单克隆抗体、 多克隆抗体、 重组抗体或抗体片段。
所述的特异抗体优选单克隆抗体。
所述的含有 BLC特异抗体的抗体组合物在制备肾移植急性排斥类型鉴别试剂中的应 用。
所述的含有 Fractalkine特异抗体、 Mig特异抗及 C4d特异抗体组合物在制备肾移植 急性排斥反应诊断试剂中的应用。
所述的含有 Fractalkine特异抗体、 Mig特异抗体、 Granzyme B特异抗体及 C4d特异 抗体组合物在制备肾移植急性排斥反应诊断试剂中的应用。
BLC特异抗体、 Fractalkine特异抗体、 Mig特异抗体及 C4d特异抗体组合物在制备肾 移植急性排斥反应诊断试剂和 /或肾移植急性排斥类型鉴别试剂中的应用。
BLC特异抗体、 Fractalkine特异抗体、 Mig特异抗体、 Granzyme B特异抗体及 C4d特 异抗体组合物在制备肾移植急性排斥反应诊断试剂和 /或肾移植急性排斥类型鉴别试剂中 的应用。
一种含有抗体组合物的试剂盒, 所述的抗体组合物为 BLC特异抗体。 一种含有抗体组合物的试剂盒, 为 Fractalkine特异抗体、 Mig特异抗体及 C4d特异 抗体。
一种含有抗体组合物的试剂盒, 为 Fractalkine特异抗体、 Mig特异抗体、 Granzyme B 特异抗体及 C4d特异抗体。
一种含有抗体组合物的试剂盒, 所述的抗体组合物为 BLC特异抗体、 Fractalkine特异 抗体、 Mig特异抗体及 C4d特异抗体。
一种含有抗体组合物的试剂盒, 所述的抗体组合物为 BLC特异抗体、 Fractalkine特异 抗体、 Mig特异抗体、 Granzyme B特异抗体及 C4d特异抗体。
以上的抗体组合物的试剂盒, 是采用 ELISA、 放射免疫分析、 自动化免疫分析、 免 疫沉淀、 流式微珠测定或液态芯片技术 (LUMINEX) 平台制备和测定的。
一种诊断肾移植急性排斥反应的方法,包括:通过本发明的抗体组合物,即 Fractalkine 特异抗体、 Mig特异抗体及 C4d特异抗体的组合物或者 Fractalkine特异抗体、 Mig特异抗 体、 Granzyme B 特异抗体及 C4d特异抗体的组合物检测受试者尿液样本中的细胞因子 Fractalkine、 Mig和 C4d的浓度, 或者细胞因子 Fractalkine、 Mig、 Granzyme B和 C4d 的浓度, 从而根据各因子浓度的高低诊断肾移植急性排斥。
一种鉴别肾移植急性排斥类型的方法,包括:通过 BLC特异抗体检测受试者尿液样本 中的细胞因子 BLC的浓度, 从而根据所述浓度的高低鉴别肾移植急性排斥类型。
本发明的有益效果:
本发明联合 Fractalkine、 Mig和 C4d这三种细胞因子的特异抗体, 对 81例急性排 斥和 167例肾功能稳定者的尿液分析,可诊断急性排斥,敏感性和特异性分别达到 91.4%, 90.4%; 当联合 Fractalkine、 Mig、 Granzyme B和 C4d这四种细胞因子的特异抗体, 诊断 急性排斥的敏感性和特异性分别达到 95.1%, 84.4%。大样本量及敏感性特异性结果使得 本发明的技术方案达到了临床诊断的要求,可进一步地用于制备肾急性排斥反应的诊断试 剂,从而本发明克服了现有技术中单一细胞因子诊断试剂敏感性和特异性较低,难以达到 临床诊断要求的缺陷。
发明人对 81例急性排斥,其中 28例为抗体介导的排斥, 53例为 T细胞介导的排斥, BLC可很好的鉴别细胞性排斥和抗体介导的排斥,敏感度和特异度分别为 89.3%, 88.7% , 说明 BLC细胞因子能够鉴别急性排斥类别 (细胞性排斥还是抗体介导的排斥)。 本发明人进而联合 Fractalkine特异抗体、 Mig特异抗体及 C4d特异抗体及 BLC特异 性抗体的抗体组合物, 利用此抗体组合物, 可以一次性诊断急性排斥, 并可准确诊断急性 排斥的类型为细胞性排斥或是抗体介导的排斥。若为了提高特异性, 也可联合 Fractalkine 特异抗体、 Mig特异抗体、 Granzyme B特异抗体及 C4d特异抗体及 BLC特异性抗体的抗 体组合物。利用此抗体组合物制备的检测试剂克服了目前对于急性排斥类别的诊断仅限于 肾组织活检的缺陷, 为临床诊断肾急性排斥反应及肾急性排斥类别提供了一种无创性方 法。
本发明还提供了制备试剂盒的方法, 可以采用 ELISA (酶联免疫吸附测定)、放射免 疫分析、 自动化免疫分析、 免疫沉淀、 流式微珠测定或液态芯片技术 (LUMINEX) 平台 制备和测定。 优选液态芯片技术平台制备。 液态芯片技术 (luminex) 是一种新型生物分 子高通量检测技术, 也是目前唯一得到权威机构和 FDA共同认可用于临床诊断应用的生 物芯片平台 , 具有比传统 ELISA更高的灵敏度和高通量的优势, 本发明的抗体组合物运 用液态芯片技术 (LUMINEX) 平台制备成试剂盒可进一步提高其敏感度和特异度。 具体实施方式
实施例 1: Fractalkine, Mig, Granzyme B、 C4d分别单独及联合诊断肾移植急性排斥反 应
实验方法:
1. 测定各细胞因子的 ELISA试剂盒购自公司及货号: Mig (R&D Systems, DCX900), Fractalkine (R&D Systems, DY365), Granzyme B (Bender MedSy stems, BMS202), C4d
(QUIDEL, A008)。
2. 本实验研究对象为: 167例非排斥, 81例急性排斥的尿液样本, 尿标本均来自浙江大 学医学院附属第一医院肾脏病中心的移植标本库。尿标本留取的原则: 移植术后 2、 4、 6、 8周及术后随访常规留取晨尿; 所有移植肾活检者在活检之前即刻留取尿标本。 留取的尿 标本尽快放入一 80°C低温冰箱保存。
3. ELISA测定按照试剂盒说明书操作。
4. 肾活检诊断根据 Banff2003标准。
5. 统计学方法: 利用软件 SPSS 11.5 ( SPSS Inc., Chicago, IL, USA) , ROC分析评价 单个和 4个因子的联合诊断价值。
实验结果: 以移植肾病理活检结果为金标准, 将 167例非排斥, 81例急性排斥患者的各细胞因子 的尿液测定值导入 SPSS 11.5, 选取 ROC的统计方法, 以急性排异作为阳性。
Fractalkine 单个因子诊断急性排异的敏感性和特异性分别为 80.3%, 81.4% , cutoff =271.29 ng/mmol creatinine (cutoff 以 creatinine作为尿液浓度校正, 即等于某样本中 测得细胞因子的浓度比该样本的 creatinine浓度; 下文含义相同) 。 检测结果与 cutoff越 接近, 则诊断急性排斥特异性和敏感性越佳, 当结果较 cutoff越大, 诊断急性排斥的敏感 性越小特异性越大; 当结果较 cutoff越小, 诊断急性排斥的敏感性越大特异性越小。 即检 测结果较 cutoff越大, 则肾移植导致急性排斥的概率越大; 检测结果较 cutoff越小, 则肾 移植导致急性排斥的概率越小 (结论同下)。
Mig 单个因子诊断急性排异的敏感性和特异性分别为 91.4%, 66.5% , cutoff= 1.38ng/mmol creatinine。
Granzyme B 单个因子诊断急性排异的敏感性和特异性分别为 43.2%, 93.5% , cutoff =0.58 ng/mmol creatinine。
C4d 单个因子诊断急性排异的敏感性和特异性分别为 67.9%, 96.4% , cutoff=570 ng/mmol creatinine。
Fractalkine, Mig及 C4d这 3个细胞因子联合诊断急性排斥的敏感性和特异性分别为 91.4% , 90.4%。
Fractalkine Mig、 C4d、 Granzyme B这 4个细胞因子联合诊断急性排斥的敏感性和 特异性分别为 95.1%, 84.4%。 实施例 2: 联合 Fractalkine、 Mig, C4d和 BLC4个细胞因子诊断移植肾急性排斥反应和 鉴别排斥类型
实验方法:
1. 各 ELISA试剂盒购自公司及货号: Mig (R&D Systems, DCX900 ) , Fractalkine (R&D Systems, DY365 ), C4d ( QUIDEL, A008 ), BLC (R&D Systems, DCX130) 。
2. 本实验研究对象为: 167例非排斥, 81例急性排斥的尿液样本, 其中 28例抗体介导 的排斥, 53例 T细胞介导的排斥, 尿标本均来自浙江大学医学院附属第一医院肾脏病中 心的移植标本库。 尿标本留取的原则: 移植术后 2、 4、 6、 8周及术后随访常规留取晨尿; 所有移植肾活检者在活检之前即刻留取尿标本。留取的尿标本尽快放入一 80°C低温冰箱保 存。
3. ELISA测定按照试剂盒说明书操作。
4. 肾活检诊断根据 Banff2003标准。
5. 统计学方法: 利用软件 SPSS 11.5 ( SPSS Inc., Chicago, IL, USA) , ROC分析评价 单个因子诊断价值和 4个因子的联合诊断价值。
实验结果:
以移植肾病理活检结果为金标准, 将 167例非排斥, 81例急性排斥患者的各细胞因子 的尿液测定值导入 SPSS 11.5, 选取 ROC的统计方法, 以急性排异作为阳性。
Fractalkine, Mig及 C4d这 3个细胞因子联合诊断急性排斥的敏感性和特异性分别为 91.4%, 90.4%。 检测结果与 cutoff 越接近, 则诊断急性排斥特异性和敏感性越佳, 当结 果较 cutoff越大, 诊断急性排斥的敏感性越小特异性越大; 当结果较 cutoff越小, 诊断急 性排斥的敏感性越大特异性越小。即检测结果较 cutoff越大, 则肾移植导致急性排斥的概 率越大; 检测结果较 cutoff越小, 则肾移植导致急性排斥的概率越小 (结论同下)。
在 81例急性排斥患者中, 将 53例 T细胞介导的排斥, 28例抗体介导的排斥患者的 的 BLC的尿液测定值导入 SPSS11.5, 选取 ROC的统计方法, 以抗体介导的排斥作为阳 性。
BLC鉴别诊断 T细胞介导的排斥和抗体介导的排斥的敏感性和特异性分别为 89.3%, 88.7%? cutoff=5.97ng/mmol creatinine。
检测结果与 cutoff 越接近, 则诊断抗体介导的排异特异性和敏感性越佳, 当结果较 cutoff越大, 诊断抗体介导的排异的敏感性越小特异性越大, 且 T细胞介导的排斥的敏感 性越小特异性越大;当结果较 cutoff越小,诊断抗体介导的排异的敏感性越大特异性越小, 且 T细胞介导的排斥的敏感性越大特异性越小。即检测结果较 cutoff越大,则鉴定为抗体 介导的排异的概率越大;检测结果较 cutoff越小,则鉴定为抗体介导的排异的概率越小(结 论同下)。 实施例 3: 联合 Fractalkine、 Mig、 Granzyme B、 C4d和 BLC 5个细胞因子诊断移植肾急 性排斥反应和鉴别排斥类型
实验方法:
1. 各 ELISA试剂盒购自公司及货号: Mig (R&D Systems, DCX900) , Fractalkine ( R&D Systems, DY365 ), Granzyme B ( Bender MedSystems, BMS202 ), C4d ( QUIDEL, A008), BLC (R&D Systems, DCX130) 。
2. 本实验研究对象为: 167例非排斥, 81例急性排斥的尿液样本, 其中 28例抗体介导 的排斥, 53例 T细胞介导的排斥, 尿标本均来自浙江大学医学院附属第一医院肾脏病中 心的移植标本库。 尿标本留取的原则: 移植术后 2、 4、 6、 8周及术后随访常规留取晨尿; 所有移植肾活检者在活检之前即刻留取尿标本。留取的尿标本尽快放入一 80°C低温冰箱保 存。
3. ELISA测定按照试剂盒说明书操作。
4. 肾活检诊断根据 Banff2003标准。
5. 统计学方法: 利用软件 SPSS 11.5 ( SPSS Inc., Chicago, IL, USA) , ROC分析评价 单个因子诊断价值和 4个因子的联合诊断价值。
实验结果:
以移植肾病理活检结果为金标准, 将 167例非排斥, 81例急性排斥患者的各细胞因子的 尿液测定值导入 SPSS 11.5, 选取 ROC的统计方法, 以急性排异作为阳性。
Fractalkine、 Mig、 C4d、 Granzyme B这 4个细胞因子联合诊断急性排斥的敏感性和特异 性分别为 95.1%, 84.4%。 检测结果与 cutoff越接近, 则诊断急性排斥特异性和敏感性越 佳, 当结果较 cutoff越大,诊断急性排斥的敏感性越小特异性越大; 当结果较 cutoff越小, 诊断急性排斥的敏感性越大特异性越小。即检测结果较 cutoff越大, 则肾移植导致急性排 斥的概率越大; 检测结果较 cutoff越小, 则肾移植导致急性排斥的概率越小。
在 81例急性排斥患者中, 将 53例 T细胞介导的排斥, 28例抗体介导的排斥患者的 BCL 的尿液测定值导入 SPSS 11.5, 选取 ROC的统计方法, 以抗体介导的排斥作为阳性。 BLC 鉴别诊断 T 细胞介导的排斥和抗体介导的排斥的敏感性和特异性分别为 89.3%, 88.7%? cutoff=5.97ng/mmol creatinine。
检测结果与 cutoff越接近, 则诊断抗体介导的排异特异性和敏感性越佳, 当结果较 cutoff 越大, 诊断抗体介导的排异的敏感性越小特异性越大, 且 T细胞介导的排斥的敏感性越 小特异性越大; 当结果较 cutoff越小, 诊断抗体介导的排异的敏感性越大特异性越小, 且 T细胞介导的排斥的敏感性越大特异性越小。 即检测结果较 cutoff越大, 则鉴定为抗体介 导的排异的概率越大; 检测结果较 cutoff越小, 则鉴定为抗体介导的排异的概率越小。 实施例 4: 制备含 Fractalkine、 Mig、 C4d及 BLC四种单抗的试剂盒 试剂盒中抗体微珠的制备: (步骤 10 调整加减相应单抗来开发相应细胞因子的试剂 盒, 试剂盒中其他组分皆可由商业化途径购买或用常规技术配置)。
1、 清洗微珠 (MicroPlex bead, Luminex), (涡旋, 真空超声 30s);
2、 取 4种不同微珠各 5 X 106个微珠 (约 400ul) 到离心管中;
3、 8000g离心 2min;
4、 弃上清, 加 100ul ddH2O, 涡旋, 真空超声 30s;
5、 8000g离心 2min;
6、 弃上清, 力。 80ul 100mM NaH2PO4,, lOul 50mg/ml Sulfo-NHS, lOul 50mg/ml EDC, 涡 旋, 真空超声 30s;
7、 避光室温放置 20min (每隔 lOmin涡旋一下);
8、 8000g离心 2min;
9、 250ul 50mM MES缓冲液清洗两次;
10、 弃上清, 加 lOOul 50mM MES缓冲液, 加入相应 lOul BLC抗体 (Cat.no MAB801 , R&D systems , USA), lOul Mig抗体(MAB392, R&D systems , USA),C4d抗体(Cat.no MA1-83988, Thermo Scientific), Fractalkine抗体(MAB 3652, R&D systems , USA) 和 350ul 50mM MES缓冲液, 涡旋, 真空超声 30s;
11、 在震荡仪 (500-600rpm) 上避光室温放置 2h;
12、 8000g离心 2min;
13、 弃上清, 加入 500ul PBS-TBN, 涡旋, 真空超声 30s;
14、 8000g离心 2min;
15、 弃上清, 加入 lml PBS-TBN, 涡旋, 真空超声 30s;
16、 8000g离心 2min;
17、 弃上清, 加 lml PBS, 1%BSA, 0.05%叠氮钠;
18、 4°C避光保存。
试剂盒组成部分:
蛋白标准品 ( Fractalkine、 Mig、 C4d、 BLC) lml X 2管
抗体微珠 (10 X ) 0.5mlX l管
生物素标记的抗体浓縮液 (10 X ) lmlX l管
洗液 ( 10 X ) 即 PBS, 10 BSA含 150mM sodium azide ( 10 X ) 30ml X I瓶
Biotin稀释液 12ml X 1瓶 Streptavidin-RPE浓縮液 ( 10 X ) 1ml X 1管
Streptavidin-RPE稀释液 12ml X 1管
96空板 1盒
上述 "(10 X ) "表示 10倍浓度的浓縮液。
试剂盒的使用
1、 已制备好的抗体微珠 (100个珠子 /ul) 超声涡旋 20s;
2、 I X洗液预湿实验所需要的孔, 真空抽吸;
3、 每孔加 50ul抗体珠子稀释液;
4、 Std组按浓度梯度每孔均加入五种蛋白标准品: Fractalkine、 Mig、 C4d及 BLC, 对照 组加入 PBS-1%BSA, 设立复孔; 实验组每孔加入 50ul尿液; 轻轻混匀;
5、 避光震荡仪 (500-600rpm) 上震荡 30min;
6、 真空抽吸上清;
7、 每孔加 lOOul洗液, 清洗两次;
8、 每孔加 50ul洗液, 轻轻混匀;
9、 抗体先用 biotin稀释液稀释, 每孔加入 50ul 4ug/ml生物素标记的 Mig抗体 (Cat.no BAF392, R&D systems , USA), C4d抗体 (Cat.no ab48345, Abeam), Fractalkine抗体
(Cat.no BAF3652, R&D systems, USA), BLC抗体(Cat.no BAF801 , R&D systems, USA) 轻轻混匀;
10、 避光, 震荡仪 ( 500-600rpm) 上震荡 30min;
11、 真空抽吸上清;
12、 每孔加 lOOul洗液, 清洗两次;
13、 每孔加 50ul洗液, 轻轻混匀;
14、 Streptavidin-RPE浓縮液先用 Streptavidin-RPE稀释液稀释, 每孔加 50ul稀释好的 Stretavidin-RPE ( I X ), (Cat.no 405203, Biolegend, USA), 轻轻混匀;
15、 避光, 震荡仪 (500-600rpm) 上震荡 30min;
16、 真空抽吸上清;
17、 每孔加 lOOul洗液, 清洗两次;
18、 每孔加 lOOul洗液, 轻轻混匀;
19、 每孔吸 50ul, 在 Luminex上检测。
检测结果导入 Luminex 分析软件, 按软件说明书操作, 确定尿液中各因子的含量 (Luminex给出的结果是各因子的含量), 再利用 SPSS统计分析, 判断结果。 实施例 5
基于实施例 4制备的试剂盒 (每个单抗用量为 50ug/ml l0ul), 检测肾移植术后受者 发生肾急性排斥反应的情况。
1. 研究对象为肾移植术后受者, 并且具有明确病理诊断, 移植肾功能稳定者 (no-AR) 30例, 急性排斥 30 (AR) 例, 其中细胞性排斥 (TMR) 20例, 抗体介导的排斥
(AMR) 10例。
2. 检测样本为以上受者的尿液标本 lml, 同时利用生化仪测定尿液中肌酐浓度。
3. 按照试剂盒说明书检测分析, 判断标准如下:
Fractalkine能检测浓度为 0-10ng/ml, Mig为 0-2000pg/ml, C4d为 0-0.4ug/ml, BLC 为 0-500pg/mlo
区分 AR禾 B no-AR的 cutoff值分另 lj为: Fractalkine 为 300ng/mmol creatinine, Mig为 1.5ng/mmol creatinine, C4d为 0.6ug/mmol creatinine。
区分 AMR和 TMR的 cutoff值, BLC为 6 ng/mmol creatinine。 结果如下表:
表 1
敏感度 特异度 P值
AR vs no-AR 93.3% 93.3% <0.01
AMR vs TMR 90% 90% <0.01
实施例 6
利用基于 luminex平台联合 Fractalkine、 Mig和 C4d开发的移植肾急性排斥诊断试剂 盒检测肾移植术后受者发生肾急性排斥反应的情况。试剂盒制备方法同实施例 4, 仅是加 入的抗体为 Fractalkine、 Mig和 C4d单抗,微珠种类为 3种,每个单抗用量为 50ug/ml 10uL 1, 研究对象为肾移植术后受者, 并且具有明确病理诊断, 移植肾功能稳定者 (no-AR) 30例, 急性排斥 30 (AR) 例。 , 检测样本为以上受者的尿液标本 lml, 同时利用生化仪测定尿液中肌酐浓度。 , 按照试剂盒说明书检测分析, 判断标准同实施例 4。
, Fractalkine能检测浓度为 0-10ng/ml, Mig为 0-2000pg/ml, C4d为 0-0.4ug/ml。 区分 AR禾 B no-AR的 cutoff值分别为: Fractalkine 为 298ng/mmol creatinine, Mig为
1.45ng/mmol creatinine, C4d为 0.58ug/mmol creatinine。
, 将以上研究对象的尿液测定值导入 SPSS11.5, 选取 ROC的统计方法, 以急性排异 作为阳性, Fractalkine、 Mig和 C4d单抗这 3个细胞因子联合诊断急性排斥的敏感性 和特异性结果如下表:
表 2 敏感度 特异度 P值
AR vs no-AR 93.3% 93.3% <0.01

Claims

权 利 要 求 书
1、一种抗体组合物, 其特征在于该抗体组合物含有 Fractalkine特异抗体、 Mig特异抗体、 及 C4d特异抗体。
2、 一种抗体组合物, 其特征在于该抗体组合物含有 BLC特异性抗体、 Fractalkine特异抗 体、 Mig特异抗体及 C4d特异抗体。
3、根据权利要求 1或 2所述的抗体组合物, 其特征在于该抗体组合物还含有 Granzyme B 特异抗体。
4、根据权利要求 1、 2或 3所述的抗体组合物,其特征在于所述的特异抗体为单克隆抗体、 多克隆抗体、 重组抗体或抗体片段。
5、 根据权利要求 4所述的抗体组合物, 其特征在于所述的特异抗体为单克隆抗体。
6、 BLC特异性抗体在制备肾移植急性排斥类型鉴别试剂中的应用。
7、 权利要求 1或 3所述的抗体组合物在制备肾移植急性排斥反应诊断试剂中的应用。
8、权利要求 2或 3所述的抗体组合物在制备肾移植急性排斥反应诊断试剂和 /或肾移植急 性排斥类型鉴别试剂中的应用。
9、 一种含有权利要求 1、 2或 3所述抗体组合物的试剂盒。
10、 根据权利要求 9所述的试剂盒, 其特征在于所述的试剂盒是采用 ELISA、 放射免疫 分析、 自动化免疫分析、 免疫沉淀、 流式微珠测定或液态芯片技术 (LUMINEX) 平台制 备和测定的。
11、 一种诊断肾移植急性排斥反应的方法, 包括: 通过权利要求 1、 2或 3所述的抗体组 合物检测受试者尿液样本中的细胞因子 Fractalkine Mig和 C4d的浓度, 或者细胞因子 Fractalkine Mig、 Granzyme B和 C4d的浓度, 从而根据各因子浓度的高低诊断肾移植 急性排斥。
12、 一种鉴别肾移植急性排斥类型的方法, 包括: 通过 BLC特异抗体检测受试者尿液样 本中的细胞因子 BLC的浓度, 从而根据所述浓度的高低鉴别肾移植急性排斥类型。
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