KR20190034511A - Biomarker composition for diagnosing systemic lupus erythematosus comprising AIMP1 and method for diagnosing systemic lupus erythematosus using the same marker - Google Patents

Abstract

The present invention relates to a biomarker composition for diagnosing systemic lupus erythematosus (SLE) comprising AIMP1 as an active ingredient, and a method for diagnosing SLE using the same. Specifically, the present invention relates to a biomarker composition for diagnosing SLE comprising AIMP1, an SLE diagnostic kit using the same, and a method for diagnosing SLE. Also, the present invention provides a biomarker composition for SLE prognosis prediction containing AIMP1 as an active ingredient, a kit for SLE prognosis prediction using the same, and an SLE prognosis prediction method. Therefore, AIMP1 can be useful for SLE diagnosis and prognosis prediction.

Description

[0001] The present invention relates to a biomarker composition for the diagnosis of systemic lupus erythematosus comprising AIMP1 and a method for diagnosing systemic lupus erythematosus using the same,

The present invention relates to a biomarker composition for the diagnosis of systemic lupus erythematosus (SLE) comprising an aminoacyl-tRNA synthetase complex interacting multifunctional protein-1 (AIMP1) And a method for diagnosing systemic lupus erythematosus using the same.

Systemic lupus erythematosus (SLE) is a prototypical systemic immune disease that is caused by pathophysiologically excessive autoantibody production and immune complex formation. To date, several autoreactive immune cells have been identified that contribute to the progression and deterioration of SLE. Of these, dendritic cells and B cells are still at the forefront in the pathogenesis of SLE, which may promote the production of interferon-α as well as autoantibodies. In addition, autoreactive immune cells express nuclear factor kappa (B) through the extracellular signal-regulated kinase (ERK) / mitogen-activated protein kinase (MAPK) B; NF-KB). Next, the activated NF-κB is expressed in the presence of downstream genes such as interferon-γ, IL-1, IL-2, IL-6, IL-12, IL-17 and tumor necrosis factor Promoting expression. SLE may also be affected by changes in T-cell population, such as decreased Treg cells and increased Th17 cells and follicle-assisted T cells. In other words, if there is a molecule that can regulate autoreactive immune cell regulation and cytokine imbalance in the blood of SLE patients, this would be a good biomarker to predict SLE disease activity.

Transfer Ribonucleic acids (tRNAs) are generally composed of 75-95 nucleotides, and based on the individual codons of messenger RNA, tRNAs play an important role in the protein translation process that transfers specific amino acids to the ribosome . To date, 20 different tRNAs have been identified in humans, and each amino acid binds to a tRNA by aminoacyl-tRNA synthetases (ARSs). Compared to prokaryotic ARSs, mammalian ARS has eleven different ARSs and aminoacyl-tRNA synthetases-interacting multifunctional proteins (AIMP) 1 / p43, AIMP2 / p38 and AIMP3 / p18 Lt; RTI ID = 0.0 > non-enzymatic < / RTI > AIMPs have been implicated in the assembly of complex-forming enzymes. 1) AIMPs bind strongly to each other, which affects the intracellular stability of each AIMP. 2) Each AIMP has a preferred interacting enzyme. 3) In particular, AIMP1 appears to be an important cofactor located centrally in the multi-tRNA synthetase complex, which may facilitate the transfer of tRNA to the catalytic site of bound ARSs.

Apart from the function of AIMP1 that binds to the multi-tRNA synthetase complex, AIMP1 can be secreted in the course of hypoxic conditions and in the course of apoptosis / necrosis cell death, which has several immunostimulatory effects. First, secretory AIMP1 can promote angiogenesis through activation of ERKs. AIMP1 is a pro-inflammatory cytokine such as TNF-a, interleukin (IL) -6, IL-8 and macrophage chemotactic protein (MCP) -1 via p38 MAPK and NF- Lt; RTI ID = 0.0 > monocytes and macrophages. ≪ / RTI > Third, AIMP1 can induce dendritic cell maturation and increase IL-6 and IL-12 production. In addition, we have previously shown that serum AIMP1 measured in rheumatoid arthritis patients with mice with collagen-induced arthritis is higher than healthy controls, and monoclonal antibodies targeting AIMP1 improve severe arthritis, IL-1 ?, IL-8, MCP-1 and TNF-a. However, the relevance of AIMP1 to SLE has not been clarified.

Korean Patent Laid-Open No. 10-2012-0100969 (published on September 12, 2012)

It is an object of the present invention to provide a biomarker composition for SLE diagnosis or prognosis prediction comprising AIMP1 as an active ingredient, and to provide a SLE diagnostic method or a SLE prognosis prediction method using the same.

The present invention provides a biomarker composition for SLE diagnosis comprising AIMP1 as an active ingredient.

In addition, the present invention provides an SLE diagnostic composition comprising as an active ingredient a preparation capable of measuring the level of AIMP1.

The present invention also provides an SLE diagnostic kit comprising the SLE diagnostic composition.

(1) measuring AIMP1 levels from a sample isolated from an SLE patient; (2) comparing the measured AIMP1 level to a control sample; And (3) determining the SLE if the measured AIMP1 level is higher than the control sample, provides a method for providing information necessary for SLE diagnosis.

(1) measuring AIMP1 levels from a sample isolated from an SLE patient; And (2) determining SLE when the measured AIMP1 level is 5 to 20 ng / mL. The present invention also provides a method for providing information necessary for SLE diagnosis.

The present invention also provides a biomarker composition for predicting an SLE prognosis comprising AIMP1 as an active ingredient.

The present invention also provides a composition for predicting an SLE prognosis, which comprises a preparation capable of measuring the level of AIMP1 as an active ingredient.

In addition, the present invention provides a kit for predicting an SLE prognosis comprising the composition for predicting the SLE prognosis.

(1) measuring AIMP1 levels from a sample isolated from an SLE patient; And (2) determining that the measured AIMP1 level is 10 to 20 ng / mL as the active SLE, the present invention provides a method for providing information necessary for SLE prognosis prediction.

The present invention relates to a biomarker composition for SLE diagnosis comprising AIMP1 as an active ingredient and a method for diagnosing SLE using the same, and more particularly to a biomarker composition for SLE diagnosis including AIMP1, an SLE diagnostic kit using the same, and a SLE diagnostic method . The present invention also provides a biomarker composition for predicting SLE prognosis, comprising AIMP1 as an active ingredient, and an SLE prognosis prediction kit and a SLE prognosis prediction method using the same. Therefore, the AIMP1 of the present invention can be usefully used for SLE diagnosis and prognosis prediction.

Figure 1 shows the comparison of serum AIMP1 between patients with SLE and healthy controls. Patients with active and stable SLE had higher mean serum AIMP1 than healthy controls. Data are expressed as mean and error bars are expressed as interquartile ranges (IQR). * p < 0.001.
Figure 2 shows the association of serum AIMP1 with experimental parameters associated with disease activity or inflammatory factors in patients with SLE. Serum AIMP1 was significantly associated with SLEDAI-2K, and serum AIMP1 was associated with laboratory parameters associated with disease activity or inflammatory factors.
Figure 3 shows the optimal cut-off result of serum AIMP1 for predicting active SLE. Active SLE was more frequently observed in patients with serum AIMP1 ≥10.09 ng / mL than patients with serum AIMP1 <10.09 ng / mL [80.5% (29/36 patients) vs. 49.1% (61/124 patients)].

Therefore, the present inventors confirmed the relationship between serum AIMP1 and SLE disease activity on the assumption that the onset of SLE and secretory AIMP1 may be related to each other, and based on the SLE disease activity index (SLEDAI) -2K And the present invention was completed.

The present invention relates to a diagnostic bioreactor for systemic lupus erythematosus (SLE) comprising an aminoacyl-tRNA synthetase complex interacting multifunctional protein-1 (AIMP1) as an active ingredient, Lt; / RTI &gt;

The term &quot; diagnosing &quot; herein is used to determine the susceptibility of an object to a particular disease or disorder, to determine whether an object currently has a particular disease or disorder, Determining the prognosis of the object, or therametrics (e.g., monitoring the status of the object to provide information about the therapeutic efficacy).

In addition, the present invention provides an SLE diagnostic composition comprising as an active ingredient a preparation capable of measuring the level of AIMP1.

The agent for measuring the level of AIMP1 may include, but is not limited to, an antibody, a peptide, an aptamer or a compound that specifically binds to AIMP1, as long as it can be performed by a method known in the art But is not limited thereto.

The present invention also provides an SLE diagnostic kit comprising the SLE diagnostic composition.

(1) measuring AIMP1 levels from a sample isolated from an SLE patient; (2) comparing the measured AIMP1 level to a control sample; And (3) determining the SLE if the measured AIMP1 level is higher than the control sample, provides a method for providing information necessary for SLE diagnosis.

(1) measuring AIMP1 levels from a sample isolated from an SLE patient; And (2) determining SLE when the measured AIMP1 level is 5 to 20 ng / mL. The present invention also provides a method for providing information necessary for SLE diagnosis.

As used herein, the term &quot; sample &quot; includes, but is not limited to, tissues, cells, blood, serum, plasma, saliva, sputum, cerebrospinal fluid, or urine that differ from the control at the AIMP1 level. Preferably blood, and more preferably serum.

The present invention also provides a biomarker composition for predicting an SLE prognosis comprising AIMP1 as an active ingredient.

As used herein, the terms "marker", "biological marker", "biomarker" are used interchangeably. The marker is generally a molecule or a compound that can be detected in a biological sample, and is an indicator capable of detecting a specific change in a living body. In the present invention, the marker is AIMP1, and the metabolites thereof are also included in the scope of the present invention. By measuring these levels, SLE can be diagnosed or the prognosis predicted.

The present invention also provides a composition for predicting an SLE prognosis, which comprises a preparation capable of measuring the level of AIMP1 as an active ingredient.

The agent for measuring the level of AIMP1 may include, but is not limited to, an antibody, a peptide, an aptamer or a compound that specifically binds to AIMP1, as long as it can be performed by a method known in the art But is not limited thereto.

The present invention also provides an SLE prognosis prediction kit comprising the SLE prognostic composition composition.

The term "antibody" as used herein refers to a specific immunoglobulin as indicated in the art and directed against an antigenic site. Any of those prepared through the above-mentioned one or more protein injections or commercially available can be used. In addition, the antibody includes a polyclonal antibody, a monoclonal antibody, and a fragment capable of binding to an epitope. The forms of the antibodies include polyclonal or monoclonal antibodies, including all immunoglobulin antibodies. The antibody refers to a complete form having two full-length light chains and two full-length heavy chains. The antibody also includes a special antibody such as a humanized antibody.

In addition, the kit of the present invention comprises an antibody that specifically binds to a marker component, a secondary antibody conjugate conjugated with a labeling substance that is colored by the reaction with the substrate, a coloring substrate solution that reacts with the labeling substance, Enzyme reaction termination solutions, and the like, and can be made from a number of separate packaging or compartments, including the reagent components used.

As used herein, the term "peptide" has a high binding capacity to the target material and does not cause denaturation during thermal / chemical treatment. Also, because of its small size, it can be used as a fusion protein by attaching it to other proteins. It can be used as a diagnostic kit and a drug delivery material because it can be specifically attached to a polymer protein chain.

The term "aptamer " as used herein refers to a specific type of single-stranded nucleic acid (DNA, RNA or modified nucleic acid having a stable tertiary structure by itself and having a characteristic capable of binding with high affinity and specificity to a target molecule ). &Lt; / RTI &gt; As described above, since the aptamer is composed of a polynucleotide which is capable of specifically binding to an antigenic substance like the antibody and is more stable than the protein, has a simple structure, and is easy to synthesize, .

On the other hand, the SLE diagnostic or prognostic prediction kit may further comprise one or more other component compositions, solutions or devices suitable for the assay method.

(1) measuring AIMP1 levels from a sample isolated from an SLE patient; And (2) determining that the measured AIMP1 level is 10 to 20 ng / mL as the active SLE, the present invention provides a method for providing information necessary for SLE prognosis prediction.

As used herein, the term &quot; sample &quot; includes, but is not limited to, tissues, cells, blood, serum, plasma, saliva, sputum, cerebrospinal fluid, or urine that differ from the control at the AIMP1 level. Preferably blood, and more preferably serum.

Specifically, the AIMP1 level may be measured using an antibody that specifically binds to the AIMP1, and more specifically, an immunoassay method, a ligand binding assay, a MALDI-TOF (Matrix Desorption / Ionization Time of Flight Mass Spectrometry analysis, SELDI-TOF (Sulfation Enhanced Laser Desorption / Ionization Time of Flight Mass Spectrometry) analysis, Radiation Immunoassay, Radiation Immunodiffusion, Ouchteroni Immunodiffusion, Rocket Immunoelectrophoresis, 2-dimensional electrophoresis analysis, liquid chromatography-mass spectrometry (LC-MS), liquid chromatography-mass spectrometry / mass spectrometry (LC-MS / MS) or enzyme linked immunosorbent assay (ELISA) , But is not limited thereto.

Hereinafter, the present invention will be described in detail with reference to embodiments which do not limit the present invention. It should be understood that the following embodiments of the present invention are only for embodying the present invention and do not limit or limit the scope of the present invention. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.

< Experimental Example >

The following experimental examples are intended to provide experimental examples that are commonly applied to the respective embodiments according to the present invention.

1. Patient

The present inventors reviewed medical records of 160 patients with SLE, which were first diagnosed as SLE in the Rheumatology Department of Severance Hospital, Yonsei University College of Medicine and provided blood for serum testing from March 2015 to September 2016. The selection criteria are as follows.

1) Patients who met the American Society of Rheumatology classification criteria for SLE revised in 1997; 2) Patients without medical factors that affect serum AIMP1, erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP), such as tumors other than SLE, inflammatory diseases and autoimmune diseases , 3) patients with well-documented medical records according to the experimental data of SLEDAI-2K, whose clinical records and serum storage days were evaluated and measured in the same serum, and 4) patients with serum storage days other than SLEDA1-2K Patients with inflammatory factor-related laboratory results. Serum samples from healthy controls (n = 43) were obtained from healthy volunteers who agreed to the consent form provided by the Severance Hospital Health Examination Center. This study was approved by the Medical Research Ethics Review Board at Severance Hospital and conducted in accordance with the principles set forth in the Helsinki Declaration.

2. Clinical and experimental data, drugs

Demographic outcomes include age, gender, and duration of illness. SLEDAI-2K was used as an indicator of SLE disease activity, and its clinical characteristics and serum storage days were compared with anti-dsDNA, complement (C) 3, C4, white blood cells (WBCs) The numbers of lymphocytes and platelets and hemoglobin were calculated using the collected experimental results belonging to SLEDAI-2K. In addition, the present inventors also examined experimental data showing the inflammatory factors of SLE such as ESR and CRP other than the SLEDAI-2K experimental item. To classify activated and stabilized SLEs, we cut the SLEDAI-2K score at 5 and define patients with a sum of SLEDAI-2K scores of 5 or more as activated SLE. All experimental data were obtained by measuring the serum of the same day of storage. Drugs were identified using Korean Medicines prescription dispensing support system, and recently dosed drugs were counted.

3. Serum AIMP1  Measure

We measured serum AIMP1 levels using stored serum samples of SLE patients and healthy controls. The human AIMP1 ELISA kit was purchased from Cloud-Clone Corp. (Houston, TX 77084, USA), and the level of AIMP1 was measured according to the manufacturer's instructions. Briefly, samples were diluted 1: 5 in PBS, 100 ml samples were added to each well, and the plate was sealed and reacted at 37 DEG C for 1 hour. Then, 100 ml of the detection reagent A working solution was added to each well, and the plate was sealed and reacted at 37 DEG C for 1 hour. Each well was washed three times with 350 ml of wash solution. 100 ml of Detection Reagent B action solution was added to each well, and the plate was sealed and reacted at 37 占 폚 for 30 minutes. The plate was washed 5 times with wash buffer. 100 ml of 3,3 ', 5,5'-tetramethylbenzidine (TMB) was added to the substrate solution and allowed to react at room temperature for 15 minutes without light. Then, 50 ml of stop solution (0.1 N sulfuric acid) was added and the OD value of each well was measured at 450 nm.

4. Statistical Analysis

Continuous variables were the median of inter-quartile ranges (IQR), and categorical variables were expressed as frequency and percentage. Continuous variables were compared using Student's t-test, and categorical data were compared using the chi-square test or the Fisher's exact test. Corrections between serum AIMP1 by SLEDAI-2K and experimental parameters associated with disease activity or inflammatory factors were assessed using Pearson's correlation analysis. For the univariate analysis, the odds ratio (OR) was measured as a p-value <0.05 for all variables using multivariate logistic regression analysis. The appropriate cut-off value of serum AIMP1 for predicting active SLE was calculated by evaluating the area under the receiver operator characteristic curve (AUROC) and the relative risk of serum AIMP1 to active and stable SLE. RR) were analyzed using contingency tables and chi-square test. All statistical analyzes were performed using GraphPad Prism version 5.0 (GraphPad Software, San Diego, California, USA) and SPSS package for Windows version 21 (SPSS Inc., Chicago, Illinois, USA) ) p-value <0.05 was considered statistically significant.

< Example  1> active and stable SLE  Patient characteristics

The characteristics of SLE patients are shown in Table 1. The mean age was 41.0 and 90.0% of the patients were female. The mean duration of illness was 79.0 months. The mean SLEDAI-2K and serum AIMP1 levels were 4.5 and 6.8 ng / mL, respectively. Glucocorticoid was the most commonly used (76.8%), followed by hydroxychloroquine (42.5%) and mofetil (22.5%).

All SLE patients were cut-off at a SLEDAI score of 5 and reclassified evenly into active and stable SLE groups (80 patients per group). There was no significant difference in age and gender between the two groups. Patients with stable SLE had a longer duration of illness than patients with active SLE. Patients with active SLE had a higher mean SLEDAI-2K (7.0 vs. 2.0, p <0.001) than patients with stable SLE. In addition, patients with active SLEs were found to be significantly associated with factors that reflect increased SLE disease activity and inflammatory factors, except leukocyte count. Patients with active SLE had a higher mean serum AIMP1 (8.0 vs. 6.4 ng / mL, p <0.001) than patients with stable SLE. Among patients with active and stable SLE, the differences between drugs administered together were not statistically clear (Table 1).

< Example  2> SLE  Patients and healthy control serum AIMP1  compare

Comparing serum AIMP1 between patients with SLE and healthy controls, we found that patients with active and stable SLE had a higher mean serum AIMP1 than healthy controls (mean serum AIMP1 vs mean healthy control, p <0.001 and mean serum AIMP1 vs stable SLE vs healthy control, p <0.001) (Fig. 1).

< Example  3> SLE  The association of serum AIMP1 with laboratory parameters associated with disease activity or inflammatory factors in patients with

The present inventors have confirmed the association of serum AIMP1 with experimental parameters associated with SLEDAI-2K and disease activity or inflammatory factors in patients with SLE. Serum AIMP1 was significantly associated with SLEDAI-2K (r = -0.347, p <0.001). In addition, serum AIMP1 was associated with laboratory parameters related to disease activity or inflammatory factors. Serum AIMP1 was most strongly associated with C3 (r = -0.340, p <0.001), hemoglobin (r = -0.302, p <0.001) and anti-ds DNA (r = 0.278, p <0.001) ) (Fig. 2).

< Example  4> active On SLE  Useful predictions for As a marker  serum AIMP1

We used ROC analysis to calculate the optimal cut-off of serum AIMP1 to predict active SLE. The cut-off of optimal serum AIMP1 for active SLE prediction was 10.09 ng / mL [AUROC 0.634, 95% confidence interval (CI) 0.554-0.708, p = 0.002]. When patients were divided into two groups according to the optimal cut-off, patients with serum AIMP1 ≥10.09 ng / mL were more frequently observed active SLE (80.5% vs. 49.1%, p <0.001) than those without. Furthermore, the risk of active SLE was significantly higher in patients with serum AIMP1 ≥10.09 ng / mL (RR 1.638, 95% CI 1.287-2.082, p <0.001) (Fig.

Finally, univariate and multivariate logistic regression analyzes were performed to clarify the possibility of serum AIMP1 for active SLE prediction based on SLEDAI-2K. In the univariate analysis, except for leukocyte counts, experimental variables related to disease activity or inflammatory factors were shown to be useful in discriminating between active and stable SLE. In multivariate analysis, serum AIMP1 ≥ 10.09 ng / mL (OR 3.919, 95% CI 1.222-12.564, p = 0.021), C3 (OR 0.957, 95% CI 0.938-0.976, p <0.001), lymphocyte count OR 0.998, 95% CI 0.997-0.999, p <0.001) and ESR (OR 1.029, 95% CI 1.007-1.051, p = 0.008) were found to be useful in differentiating between active and stable SLE (Table 2).

Claims (2)

(1) aminoacyl-tRNA synthetase complex-interacting multifunctional protein-1 (AIMP1) levels from isolated samples from patients with systemic lupus erythematosus Measuring; And
(2) determining the active SLE when the measured AIMP1 level is 10-20 ng / mL. The method according to claim 1, wherein the sample is blood.

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