WO2016175625A1 - 혈장 내 아밀로이드베타의 농도를 통해 알츠하이머병을 임상학적 및 병리학적으로 모니터링하는 방법 - Google Patents
혈장 내 아밀로이드베타의 농도를 통해 알츠하이머병을 임상학적 및 병리학적으로 모니터링하는 방법 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6893—Chemical 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
- G01N33/6896—Neurological disorders, e.g. Alzheimer's disease
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4711—Alzheimer's disease; Amyloid plaque core protein
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/81—Protease inhibitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H10/00—ICT specially adapted for the handling or processing of patient-related medical or healthcare data
- G16H10/40—ICT specially adapted for the handling or processing of patient-related medical or healthcare data for data related to laboratory analysis, e.g. patient specimen analysis
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/20—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/30—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for calculating health indices; for individual health risk assessment
Definitions
- the present invention provides clinical cognitive ability by treating plasma pretreatment compositions comprising a mixture of protease inhibitors and phosphatase inhibitors (MPP) and / or TCEP in plasma and then quantifying the plasma A ⁇ concentration.
- AD Alzheimer's disease
- Dementia a degenerative brain disease with a sharp drop in memory and thinking ability, is a representative senile disease that causes gradual decline in brain function that causes problems in memory, thinking, and everyday life and behavior.
- Toxic amyloid beta A ⁇ Abeta
- a ⁇ accumulated in the brain causes damage and death of brain cells, leading to problems with various functions of the brain.
- Alzheimer's disease accounted for 51%
- vascular dementia accounted for 34%
- dementia due to infectious diseases and metabolic diseases accounted for 15%.
- Alzheimer's disease and vascular dementia are the most common causes of most dementia-causing diseases.
- there is no accurate differential diagnosis before death much debate continues on the reliability of the diagnosis.
- it is difficult to obtain the final pathologic diagnosis because it is difficult to obtain brain tissues due to the oriental way of thinking about death after death.
- Clinical diagnosis of Alzheimer's disease depends mainly on histories and neuropsychological tests, and secondary tests include imaging tests such as magnetic resonance imaging (MRI) and PET.
- MRI magnetic resonance imaging
- PET PET
- Pittsburgh compound B-positron emission tomography (Pi-PET) is a method that can be used to diagnose AD and MCI, but it is expensive.
- AD amyloid beta protein
- HSA human serum albumin
- a [beta] is concealed in albumin, its epitope is not exposed to the surface, thereby increasing the possibility of not binding to anti-A [beta] antibodies.
- proteases there are a variety of proteases in the blood, and these proteases cleave proteins and interfere with maintaining a stable protein concentration.
- Korean Patent No. 10-1493935 describes imaging using a two-photon fluorescent probe specific for amyloid beta plaques present in cells or tissues isolated from living bodies.
- Korean Patent No. 10-1478609 discloses a composition for diagnosing a disease related to beta amyloid aggregates, including curcumin derivatives or pharmaceutically acceptable salts thereof.
- curcumin derivatives or pharmaceutically acceptable salts thereof there is no description of how to pretreat plasma to quantify A ⁇ in plasma and thereby diagnose and predict MCI and AD.
- the present invention treats a mixture of a protease inhibitor and a phosphatase inhibitor (MPP) in blood (plasma) to stabilize A ⁇ 42 and / or A ⁇ 40 in plasma, and then measure the concentration of the drug. It is an object of the present invention to provide a method for diagnosing and predicting a decrease in ability (or cognitive function) and pathological A ⁇ accumulation in the brain. In addition, an object of the present invention is to provide a method for diagnosing and predicting the onset of Alzheimer's disease from the concentration of A ⁇ 42 and / or A ⁇ 40 in plasma measured by the above method.
- MPP phosphatase inhibitor
- the present invention predicts and diagnoses the clinical cognitive decline and the pathological A ⁇ accumulation in the brain from the concentration of A ⁇ 42 and / or A ⁇ 40 in the plasma measured by the above method, thereby determining whether to take brain PET.
- the aim is to provide a series of diagnostic systems.
- the present invention provides a plasma pretreatment composition, comprising a mixture of a protease inhibitor and a phosphatase inhibitor, to reduce the concentration (distribution) standard deviation of amyloid beta in plasma.
- the present invention provides a method for detecting and predicting cognitive dysfunction by detecting the concentration and concentration change of A ⁇ in the plasma treated with the plasma pretreatment composition and comparing it with the average value of A ⁇ in the plasma of a normal person.
- the present invention also provides a method for measuring the concentration of A ⁇ in the plasma treated with the plasma pretreatment composition, and predicting and diagnosing pathological A ⁇ accumulation in the brain.
- the present invention also provides information for inputting an A ⁇ concentration value detected in a plasma sample separated from a subject treated with the plasma pretreatment composition, a hemoglobin concentration value in a blood sample separated from the subject, and a MMSE score (z) measurement value of the subject.
- An information processing unit for comparing and analyzing information input from the information input unit with a value stored in a database unit and performing a logistic regression analysis; and an information output unit for outputting a result calculated from the information processing unit, and predicting clinical and pathological Alzheimer's disease And a diagnostic system.
- a reducing agent after treating MPP to the plasma, or after treatment with MPP and after further treatment with TCEP, a reducing agent, by quantifying the concentration of A ⁇ in the plasma, and comparing it with the value of A ⁇ concentration in the normal, clinical recognition Diagnose and predict dysfunctional MCI and AD.
- 1 is a diagram measuring the amount of ⁇ produced in vitro ;
- Figure 3 confirms the concentration of A ⁇ 42 and A ⁇ 40 and MMSE score (Z) in the plasma treated with MPP, [A ⁇ concentration] and [normal person and MCI], [normal person and AD] and [normal person and CI (MCI and AD) )] Is verified.
- FIG. 4 is a plasma sample obtained from patients with clinical cognitive dysfunction after treatment with MPP and detect the concentrations of A ⁇ 42 and A ⁇ 40, and compared with PET results, and confirmed the correlation with brain A ⁇ plaques .
- FIG. 5 shows the correlation between A ⁇ 40 concentration in MPP treated plasma or other factors (MMSE z-score and hemoglobin concentration in blood) and PiB-PET scan positive or negative (A ⁇ accumulation in brain). .
- FIG. 6 is a diagram illustrating the diagnosis of clinical cognitive abilities and the determination of A ⁇ accumulation (plaques) in the pathological brain via any cut-off value of A ⁇ 42 or A ⁇ 40 in plasma after MPP treatment.
- FIG. 9 is a diagram showing an example of a blood collection device including the plasma pretreatment composition and the anticoagulant of the present invention.
- FIG. 10 is a diagram showing an example of the plasma collection device of the present invention for storing the plasma separated from the blood of the subject.
- FIG. 11 is a diagram illustrating an example of collecting plasma separated from blood of a subject in a plasma collecting device including the plasma pretreatment composition of the present invention.
- the term “detect” or “measure” means to quantify the concentration of a detected or measured object.
- ⁇ 40 as used herein may also be referred to as " ⁇ 1-40".
- ⁇ 42 as used herein may also be referred to as " ⁇ 1-42".
- normal group as used herein may be used interchangeably with “normal person.”
- the term “plasma pretreatment composition (MPP)” is a mixture of protease inhibitors and phosphatase inhibitors (Mixture of protease inhibitors and phosphatase inhibitors) and may further comprise TCEP.
- TCEP can be added to a concentration of 3 mM relative to the total volume.
- Protease inhibitors may be used at least one protease inhibitor that can be commonly used, such as PMSF (phenylmethanesulfonylfluoride or phenylmethylsulfonyl fluoride), in the case of two or more may be called protease inhibitor cocktail (PIC).
- PMSF phenylmethanesulfonylfluoride or phenylmethylsulfonyl fluoride
- PIC protease inhibitor cocktail
- the invention relates to a plasma pretreatment composition
- a plasma pretreatment composition comprising a mixture of a protease inhibitor and a phosphatase inhibitor, thereby reducing the standard deviation of A ⁇ concentration in plasma.
- the plasma pretreatment composition comprises the protease inhibitor and the phosphatase inhibitor 1: 1 (v / v).
- MPP may be a mixture of Protease inhibitor cocktail (PIC): Serine protease inhibitor (PMSF): Phosphatase inhibitor cocktail I: Phosphatase inhibitor cocktail II at 1: 1: 1: 1 (v / v).
- the pretreatment composition may further comprise TCEP.
- the present invention provides a method of treating a plasma sample obtained from a subject and a normal person with a pretreatment composition of the present invention to quantify the concentration of A ⁇ 42 in plasma;
- a method of predicting and diagnosing cognitive dysfunction is provided, including comparing the concentration of A ⁇ 42 quantified from a subject plasma sample with an average concentration value of A ⁇ 42 from a normal plasma sample.
- the cognitive dysfunction may be MCI (hard cognitive impairment) or AD (Alzheimer's disease).
- MCI hard cognitive impairment
- AD Alzheimer's disease
- the concentration of A ⁇ 42 in the plasma of a subject decreases by 8.0-11.0% compared to the average A ⁇ 42 concentration of a normal person, it can be predicted that the patient is MCI at 65% or higher specificity and 75% or higher sensitivity.
- the concentration of A ⁇ 42 in the subject's plasma is 9.0 to 21.0% reduced compared to the average A ⁇ 42 concentration in normal subjects, it can be predicted that the patient is AD at 70% or more specificity and 80% or more sensitivity.
- a CI (MCI and AD) patient is at a specificity of at least 65% when the concentration of A ⁇ 42 in the subject's plasma decreases by more than 8.5% compared to the average A ⁇ 42 concentration in normal subjects.
- the concentration of A ⁇ 42 in the plasma of a subject is reduced by 8.5-10.0% compared to the average A ⁇ 42 concentration in normal subjects, it is predicted that the patient is CI (MCI and AD) at a specificity of at least 65% and at least 75%.
- the method of diagnosing cognitive abnormality of the present invention it is possible to determine whether there is an abnormality in cognitive ability clinically.
- the present invention provides a method of treating a plasma sample isolated from a subject with a pretreatment composition of the invention to quantify the concentration of A ⁇ 40 in plasma; Detecting hemoglobin concentration in blood samples isolated from the subject; Applying the concentration of A ⁇ 40 in the plasma, the concentration of hemoglobin in the blood, and the MMSE score (Z) to the logistic regression and the expression 2 of Equation 1 to derive a p-value; And it relates to a method for diagnosing the pathological A ⁇ accumulation in the brain, including comparing the derived p value with the average p value of the PET negative control.
- the p value derived from the subject increases by at least 190.0% compared to the average p value of the PET negative control group, it can be predicted that A ⁇ accumulated in the brain at a specificity of 85% or more. In the present invention, whether the accumulation of A ⁇ in the brain was ultimately confirmed by PiB-PET (Pittsburgh compound B-positron emission tomography) imaging. In one embodiment, when the p-value derived from the subject increases by 190.0 to 230.0% compared to the control-average p-value of PET negative, it can be predicted that A ⁇ accumulated in the brain at a specificity of at least 85% and at least 75%. . Accumulation of A ⁇ in the brain in the present invention is represented as PiB-PET positive (PiB-PET (+)).
- the present invention provides a method of treating a plasma sample, comprising: 1) treating a plasma sample isolated from a subject with a pretreatment composition mixed with a protease inhibitor and a phosphatase inhibitor to quantify the concentration of A ⁇ 40 in plasma; 2) subject the plasma sample isolated from the subject to a pretreatment composition mixed with a protease inhibitor, phosphatase inhibitor and TCEP and then quantify the concentration of A ⁇ 40 in the plasma; And 3) when the concentration of A ⁇ 40 quantified in 2) is greater than 8.0 pg / ml than the concentration of A ⁇ 40 quantified in 1) above, pathologically accumulating A ⁇ in the brain at a specificity of at least 65% and at least 80%.
- the present invention relates to a method for diagnosing whether A ⁇ accumulates in the brain.
- Certain increased concentrations of A ⁇ 40 such as a 9.24 pg / ml increase, can diagnose the accumulation of A ⁇ in the brain at about 70% specificity and about 87% sensitivity.
- Subjects with this increased concentration of A ⁇ 40 in plasma can be predicted to have a high probability of progressing to AD in the future even though they are normal in cognitive function.
- the TCEP used in the present invention can separate A ⁇ bound to proteins such as albumin in plasma, thereby making it more accurate to detect A ⁇ in plasma.
- concentration of A ⁇ 40 in the plasma of normal subjects was increased when MPPs including TCEP were treated. Through the method, pathologically, it is possible to determine whether A ⁇ has accumulated in the brain.
- the present invention relates to a method for simultaneously determining whether cognitive dysfunction and A ⁇ accumulation in the brain at the concentration of A ⁇ 42 or A ⁇ 40 in plasma quantified after treatment of a mixture of a protease inhibitor and a phosphatase inhibitor.
- the quantification (detection or measurement) of A ⁇ is measured by the Bioplex method is significantly superior in sensitivity and specificity compared to other methods, ELISA (Enzyme-linked immunosorbent assay).
- the present invention provides a method for treating a plasma sample isolated from a subject and a normal person, and treating the mixture of the protease inhibitor and the phosphatase inhibitor, and then comparing the concentrations of A ⁇ 40 and / or A ⁇ 42 in the plasma sample of the subject and the normal person, respectively. Determine whether the cognitive function is abnormal; And applying the concentration value of A ⁇ 40 in plasma treated with the mixture of the protease inhibitor and the phosphatase inhibitor, the hemoglobin concentration value in the blood sample isolated from the subject, and the MMSE (Z) score to the logistic regression of Equation 1 and Equation 2.
- the present invention provides a method for predicting and / or monitoring the likelihood of developing Alzheimer's disease, including determining whether the brain accumulates A ⁇ by comparing the obtained p value with the average p value of PET negative controls.
- the present invention relates to a method of providing information necessary for monitoring the progress of MCI (Middy Cognitive Impairment) to AD (Alzheimer's Disease).
- MCI Magnetic Independent Impairment
- AD Alzheimer's Disease
- the method of the present invention not only diagnoses the progression of clinical cognitive decline but also diagnoses the actual pathological progression. Can be.
- the present invention provides an A ⁇ 40 or A ⁇ 42 concentration value detected in a plasma sample isolated from a subject treated with the plasma pretreatment composition of the present invention, a hemoglobin concentration value in a blood sample isolated from the subject, and an MMSE score (z) measurement value.
- An information input unit for inputting a;
- a database unit for storing the A ⁇ mean concentration value detected in the plasma sample separated from the normal person treated with the plasma pretreatment composition and the average p value of the PET negative group;
- An information processor configured to compare and analyze the information input by the information input unit with a value stored in a database unit, perform a logistic regression analysis of Equation 1 and the operation of Equation 2, and output an information outputted from the information processor.
- step; And 4) As a result of logistic regression analysis, when the p-value derived from the subject increased by more than 190.0% compared to the average p-value of the PET negative control of the database, A ⁇ in the brain was clinically impaired and pathologically. Provided is a clinical and pathological Alzheimer's disease prediction and diagnostic system that predicts accumulation.
- the present invention provides a blood collection device comprising the plasma pretreatment composition of the present invention (see FIG. 9).
- the blood collection device may be a blood collection device further comprising an anticoagulant, for example, a blood collection tube, an Eppendorf tube or a kit, wherein the coagulant prevents blood from clotting.
- Medications may be used and may be EDTA.
- the present invention provides a plasma collection device comprising the plasma pretreatment composition of the present invention (see FIG. 10).
- the plasma collection device may collect and store only plasma in whole blood of the subject in the blood collection device (see FIG. 11).
- the plasma pretreatment composition of the present invention may be lyophilized to be included in the device, and about 340 ⁇ l of blood pretreatment composition may be included in about ⁇ 8.5 ml of blood (whole blood) or 3-4 ml of plasma.
- Plasma pretreatment compositions may include protease inhibitors and phosphatase inhibitors, for example, AEBSF 26 mM, Aprotinin 20 uM, Bestatin 1 mM, E-64 0.35 mM, Leupeptin 0.5 mM, Peptstatin A 0.375mM, (-)-p-Bromotetramisole oxalate 0.625mM, Cantharidin 125uM, Microcystin LR 125nM, Imidazole 50mM, Sodium Fluoride ) 25mM, Sodium Molybdate (28.75mM), Sodium orthovanadate (Sodium orthovanadate) 25mM, Sodium Tartrate Dihydrate (Sodium Tartrate Dihydrate) 100mM and PMSF (Phenylmethanesulfonylfluoride) 25mM.
- Blood collection device of the present invention can be stored at 2 to 8 °C after blood or plasma collection.
- a ⁇ protein was purchased from American Peptides (CA, USA) and prepared according to the manufacturer's instructions. . Specifically, A ⁇ monomer was prepared by dissolving A ⁇ peptide in DMSO and lyophilized with Speedvac (Thermo savant), and fibrous A ⁇ was prepared by incubating the monomer A ⁇ at room temperature for 24 hours. Protease inhibitor cocktail (PIC), serine protease inhibitor (PMSF), and human serum albumin (HSA) were found in Sigma Aldrich (CA, USA), and phosphatase inhibitor cocktail (Phospatase inhibitor).
- PIC prote inhibitor cocktail
- PMSF serine protease inhibitor
- HSA human serum albumin
- the INNO-BIA plasma A ⁇ forms kit Innogenetics, Gent, Belgium was used, and the plasma levels of A ⁇ were measured using X-map technology (Bioplex 200 systems; Bio-rad, Hercules, CA, USA).
- the plasma used for the experiment was obtained from the subjects of Table 1 below. Blood samples were obtained in K2 EDTA tubes (BD Vacutainer Systems, Madison, UK), stabilized at room temperature for 30 minutes and then centrifuged at 700 ⁇ g for 5 minutes at room temperature to obtain supernatant plasma samples.
- MPP a plasma pretreatment composition
- protease inhibitor cocktail Serine protease inhibitor (PMSF): phosphatase inhibitor cocktail I: phosphatase inhibitor cocktail II in a 1: 1: 1: 1 (v / v), ie protease inhibitor and phosphatase inhibitor was prepared by mixing 1: 1 (v / v).
- PMSF Serine protease inhibitor
- phosphatase inhibitor cocktail II phosphatase inhibitor cocktail II in a 1: 1: 1: 1 (v / v)
- ie protease inhibitor and phosphatase inhibitor was prepared by mixing 1: 1 (v / v).
- a ⁇ concentration in plasma by MPP treatment dilute the MPP by 1/25 in plasma diluent buffer, and dilute the plasma by 1/3 again with the diluted solution (MPP-added plasma).
- Dilution: Human plasma sample 2: 1) and then incubated for 30 minutes. After quantification by bioplex, the standard deviation of A ⁇ 42 and A
- CN cognitively normal
- MCI individuals with mild cognitive impairment
- AD patients with Alzheimer's disease
- MMSE z-score Mini-Mental State Examination of revisions taking into account age, gender and education;
- CDR Clinical Dementia Rating
- n number of objects.
- the standard deviation of A ⁇ concentrations decreased due to MPP treatment in all subjects regardless of the patient's (subject) phenotype, and the standard deviations of A ⁇ 42 and A ⁇ 40 in plasma of MCI patients and AD patients with normal MPP treatment were reduced.
- the concentration distribution range of A ⁇ 42 and A ⁇ 40 decreased between patient individuals (FIG. 2).
- the MPP treatment eliminated the noise of A ⁇ 42 and A ⁇ 40 values in the plasma, thereby increasing the reproducibility and reliability of the measured values, especially in A ⁇ 40.
- Example ⁇ 2-1> After the MPP treatment detected in Example ⁇ 2-1>, A ⁇ 42 and A ⁇ 40 values were confirmed in plasma and statistical analysis was performed using GraphPad Prizm 5 (GraphPad Software, Sandiego, CA, USA) and MedCalc (MedCalc Software, Ostend, Belgium) software. It was performed using. All data are expressed as mean ⁇ standard error of the mean (SEM). In addition, a single Student t-test (unparied Student's t-test) was used to compare plasma A ⁇ concentrations with the PiB-PET positive or negative group. Turky's multiple comparison assay was performed with GraphPad Prism 5 after ANOVA analysis. In order to evaluate the performance of the diagnostic test, stepwise logistic regression based on Receiver Operating Characteristic (ROC) curve analysis was performed using MedCalc. ROC curves were calculated using A ⁇ concentration data in plasma and area under the curve (AUC) was measured using Wilcoxon statistics.
- ROC Receiver Operating Characteristic
- Stepwise logistic regression of plasma concentrations of A ⁇ 42 before and after MPP treatment according to Receiver Operating Characteristic (ROC) curve analysis showed that MPP treatment vs. normal (CN) vs MCI, normal vs. AD and normal vs. AUC was significantly increased in both CI (cognitive impariment patients-MCI and AD), AMP was 77.7% in normal vs MCI after MPP treatment, and sensitivity (determining diseased subjects was 87.5). The percentage and specificity (determining disease-free individuals were not diseased) were 69.6%, with AUC 86.7%, sensitivity 90.0% and specificity 78.3% in normal vs AD.
- ROC Receiver Operating Characteristic
- AUC was 82.7%
- sensitivity was 83.3%
- specificity was 78.3% in normal vs. CI, indicating that A ⁇ 42 in plasma was more likely to be used as a biomarker for the diagnosis of clinical cognitive abilities.
- concentration of A ⁇ 42 in plasma after MPP treatment was 50.24 pg / ml or less
- MCI patients if the concentration of A ⁇ 42 in plasma after MPP treatment was 49.90 pg / ml or less, the patient was AD. Concentrations below 49.90 pg / ml can be predicted to be MCI and AD patients (Table 2 and FIG. 3).
- AUC area under the curve
- CI cognitive impairment individuals (ie MCI and AD).
- the cut-off value range (orange and red values) in which sensitivity and specificity change within 15% is changed.
- the mean value of MPP-A ⁇ 42 concentration in the normal group was 55.1 pg / ml
- the cut off interval in which the reliability of diagnosis was guaranteed was 49.2 to 50.24 pg / ml, which was decreased by more than 8.9 to 10.7% compared to the average value of the normal group. It can be diagnosed as MCI.
- the MCI can be diagnosed as a decrease of less than 8.9% below the average MPP-A ⁇ 42 concentration of the normal group, but can be diagnosed as an MCI when reduced to more than 10.7%.
- the ratio decreased from 8.9 to 10.7% compared to the average concentration of the normal group, which means that there is reliability to be diagnosed with MCI.
- the sensitivity and specificity are changed to a cut off value section that changes within 15%. It can be expressed as 6 (an enlarged cut off period). That is, the average MPP-A ⁇ 42 concentration was 55.1 pg / ml, and the cut-off interval for which the reliability of diagnosis was guaranteed was 44.9 to 49.9 pg / ml, which was decreased by more than 9.5 to 20.1% compared to the average value of the normal group. It can be diagnosed as AD. For example, it can be seen that the AD can be diagnosed when the decrease to less than 9.5% than the average MPP-A ⁇ 42 concentration of the normal group, but can be diagnosed as AD when reduced to 20.1% or more. However, in order to diagnose with AD, the ratio decreased from 9.5 to 20.1% compared to the average concentration of the normal group, which means that the diagnosis can be made with AD.
- the sensitivity and specificity are set to a cut off value section that changes within 15%. It can be expressed as 8 (Table 8 is an enlargement of the cutt off interval).
- Table 8 is an enlargement of the cutt off interval.
- the mean value of MPP-A ⁇ 42 concentration in the normal group was 55.1 pg / ml
- the cut off interval in which the reliability of diagnosis was guaranteed was 44.9 to 50.24 pg / ml, which was decreased by more than 8.9 to 9.5% compared to the average value of the normal group It can be diagnosed as CI.
- the CI is less than 8.9% below the average MPP-A ⁇ 42 concentration of the normal group, but can be diagnosed as CI if the decrease is more than 9.5%.
- diagnosis with CI it means that there is a reliability that can be diagnosed with CI only when the reduced ratio is 8.9 to 9.5% compared to the average concentration of the normal group.
- the concentration of A ⁇ in plasma after MPP treatment was measured to determine the relationship between SUVR (Standardized Uptake Value Ratio) values and the concentration of A ⁇ after MPP treatment.
- SUVR Standardized Uptake Value Ratio
- statistical analysis was performed as in Example ⁇ 3-1> to measure the relationship between dependent variables (PiB-PET positive or PiB-PET negative) and independent variables (A ⁇ concentration in plasma after MPP treatment). Logistic regression was performed.
- Plasma A ⁇ 40 concentration measured in the present invention was verified whether PiB-PET (Pittsburgh compound B-positron emission tomography) positive or negative confirmed the A ⁇ plaque present in the brain. Specifically, the concentration of A ⁇ 40 in plasma after MPP treatment of the PET positive (patient) group and the PET negative (patient) group was compared by a single t-test and the ROC curves were shown as in Example ⁇ 3-1>.
- the concentration of A ⁇ 40 in plasma and MMSE (Z) score after MPP treatment the concentration of A ⁇ 40 in plasma and hemoglobin concentration (Hb) in blood (wb), MMSE (Z) score after MPP treatment, and hemoglobin concentration in blood
- Logistic regression analysis was performed using Equation 1 below for the concentration of A ⁇ 40, MMSE (Z) score, and hemoglobin concentration in blood, respectively, and the pi value derived therefrom was used to calculate p value.
- the ROC curve was drawn from the p value and the cut-off value was derived.
- the cut off interval in which the reliability of diagnosis is guaranteed is 0.53 to 0.59, which is an increase of 194.7% to 224.5% compared to the average p value of the PET negative group. Therefore, it can be diagnosed as PET positive if the increase is greater than 194.7% to 224.5% compared to the average p value of the PET negative group. For example, if it is increased to less than 194.7%, it cannot be diagnosed as PET positive, but if it is increased to more than 224.5%, it can be diagnosed as PET positive. That is, in order to diagnose PET positive, the increase rate of the average value of p-negative group should be 194.7% to 224.5%, indicating that there is a reliability that can be diagnosed as PET positive.
- a ⁇ detection in the plasma processing by MPP further comprises a check TCEP
- the concentration of A ⁇ was increased when TCEP was applied to A ⁇ 42 and A ⁇ 40 treated with human serum albumin (HSA) in vitro , which destroyed and bound and aggregated tertiary structure of albumin in plasma.
- HSA human serum albumin
- a ⁇ It is thought to increase the amount of ⁇ measurable by releasing (FIG. 7A).
- the concentration of A [beta] 40 was increased when TCEP was treated in actual plasma, and it was determined that the concentration of A [beta] 40 was increased by releasing the structure of albumin (FIG. 7B).
- FIG. 7B the concentration of A ⁇ 42 in human plasma, it is judged that it is a difference between an artificial experiment outside the human body and an experiment using plasma actually present in the body.
- the concentration of A ⁇ 40 in plasma treated with MPP containing protease, phosphatase and TCEP was quantified, and then MPP containing protease and phosphatase except TCEP. was obtained by subtracting the concentration of A ⁇ 40 in the treated plasma and compared with the PiB-PET scan data.
- the cut off (criterion) value is> 9.24, through which, if the A ⁇ concentration increased by MPP treatment including TCEP is greater than 9.24 pg / ml than the A ⁇ concentration by MPP treatment containing only protease and phosphatase, PET It can be seen that there is a high probability of being a positive group, and sensitivity and specificity were 87.50% and 70.59%, respectively (FIG. 8).
- the present invention can be usefully used for the diagnosis of dementia patients in the clinic.
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Abstract
Description
Claims (16)
- 프로테아제 억제제 및 포스파타아제 억제제의 혼합물을 포함하여, 혈장 내 Aβ (amyloid beta) 농도의 표준편차를 감소시키는, 혈장 전처리 조성물.
- 제 1항에 있어서, 상기 프로테아제 억제제 및 포스파타아제 억제제가 1:1 (v/v)로 포함된, 혈장 내 Aβ 농도의 표준편차를 감소시키는, 혈장 전처리 조성물.
- 제 1항 또는 제 2항에 있어서, TCEP가 추가로 포함된, 혈장 내 Aβ 농도의 표준편차를 감소시키는, 혈장 전처리 조성물.
- 1) 피험자 및 정상인으로부터 분리된 혈장 샘플에 제 1항 또는 제 2항 혈장 전처리 조성물을 가한 후 혈장 내 Aβ42 농도를 검출하고; 및2) 상기 검출된 피험자의 혈장 내 Aβ42 농도가 정상인의 혈장 내 Aβ42 평균농도 값과 비교하여, 8.0% 초과하여 감소한 경우 65% 이상의 특이도 (specificity)에서 MCI 환자로 예측하는, 인지기능 이상을 진단하는 방법.
- 제 4항에 있어서, 상기 2)에서 검출된 피험자의 혈장 내 Aβ42 농도가 정상인의 혈장 내 Aβ42 평균농도 값과 비교하여, 8.0% 내지 11.0% 감소한 경우 65% 이상의 특이도 및 75% 이상의 민감도 (sensitivity)에서 MCI 환자로 예측하는, 인지기능 이상을 진단하는 방법.
- 1) 피험자 및 정상인으로부터 분리된 혈장 샘플에 제 1항 또는 제 2항 혈장 전처리 조성물을 가한 후 혈장 내 Aβ42 농도를 검출하고; 및2) 상기 검출된 피험자의 혈장 내 Aβ42 농도가 정상인의 혈장 내 Aβ42 평균농도 값과 비교하여, 9.0% 초과하여 감소한 경우 70% 이상의 특이도에서 AD 환자로 예측하는, 인지기능 이상을 진단하는 방법.
- 제 6항에 있어서, 상기 2)에서 검출된 피험자의 혈장 내 Aβ42 농도가 정상인의 혈장 내 Aβ42 평균농도 값과 비교하여, 9.0% 내지 21.0% 감소한 경우 70% 이상의 특이도 및 80% 이상의 민감도에서 AD 환자로 예측하는, 인지기능 이상을 진단하는 방법.
- 1) 피험자 및 정상인으로부터 분리된 혈장 샘플에 제 1항 또는 제 2항 혈장 전처리 조성물을 가한 후 혈장 내 Aβ42 농도를 검출하고; 및2) 상기 검출된 피험자 혈장 내 Aβ42 농도가 정상인의 혈장 내 Aβ42 평균농도 값과 비교하여, 8.5% 초과하여 감소한 경우 65% 이상의 특이도에서 CI(MCI 및 AD) 환자로 예측하는, 인지기능 이상을 진단하는 방법.
- 제 8항에 있어서, 상기 2)에서 검출된 피험자의 혈장 내 Aβ42 농도가 정상인의 혈장 내 Aβ42 평균농도 값과 비교하여, 8.5% 내지 10.0% 감소한 경우 65% 이상의 특이도 및 75% 이상의 민감도에서 CI (MCI 및 AD) 환자로 예측하는, 인지기능 이상을 진단하는 방법.
- 1) 피험자 및 정상인으로부터 분리된 혈장 샘플에 제 1항 또는 제 2항의 전처리 조성물을 가한 후 혈장 내 Aβ40 농도를 검출하고;2) 피험자로부터 분리된 혈액 샘플로부터 헤모글로빈(Hb) 농도를 검출하며;3) 상기 1)의 혈장 내 Aβ40 농도, 상기 2)의 헤모글로빈 농도, 및 MMSE스코어(Z)를 하기 수식 1 및 수식 2에 적용하여 p값을 수득하고; 및4) 상기 3)의 p값이, PET 음성인 개체군들의 평균 p값과 비교하여 190.0% 이상 증가한 경우 85% 이상의 특이도에서 뇌에 Aβ가 축적된 것으로 예측하는, 뇌의 병리학적인 Aβ 축적 여부를 진단하는 방법:[수식 1](pi: 확률, β0: 상수, β1: MPP-Aβ40의 계수, β2: MMSE(Z) 스코어의 계수, β3: 헤모글로빈의 계수, x1: MPP-Aβ40 값, x2: MMSE(Z) 스코어 값 및 x3: 헤모글로빈 수치)[수식 2]
- 제 10항에 있어서, 상기 3)의 p값이, PET 음성인 개체군들의 평균 p값과 비교하여 190.0% 내지 230.0% 증가한 경우 85% 이상의 특이도 및 75% 이상의 민감도에서 뇌에 Aβ가 축적된 것으로 예측하는, 뇌의 병리학적인 Aβ 축적 여부를 진단하는 방법.
- 1) 피험자로부터 분리된 혈장 샘플에 제 1항 및 제 2항의 전처리 조성물을 가한 후 혈장 내 Aβ40 농도를 검출하고;2) 피험자로부터 분리된 혈장 샘플에 제 3항의 전처리 조성물을 가한 후 혈장 내 Aβ40의 농도를 검출하며; 및3) 상기 1)의 Aβ40 농도와 비교하여 상기 2)의 Aβ40의 농도가 8.0 pg/ml 초과 증가하는 경우 65% 이상의 특이도 및 80% 이상의 민감도에서 뇌에 Aβ가 축적된 것으로 예측하는, 뇌의 Aβ 축적 여부를 진단하는 방법.
- 1) 제 1항 또는 제 2항의 혈장 전처리 조성물로 처리한 피험자로부터 분리된 혈장 샘플에서 검출한 Aβ 농도값, 피험자로부터 분리된 혈액 샘플 내 헤모글로빈 농도값, 및 피험자의 MMSE(z) 측정값을 입력하는 정보입력부;2) 상기 혈장 전처리 조성물로 처리한 정상인으로부터 분리된 혈장 샘플에서 검출한 Aβ 평균농도값, PET 음성인 대조군의 평균 p값이 저장된 데이터베이스부;3) 상기 정보입력부에서 입력한 정보를 데이터베이스에 저장된 값과 비교 분석하고, 하기 수식 1의 로지스틱 회귀분석 및 하기 수식 2의 연산을 수행하는 정보처리부,[수식 1](pi: 확률, β0: 상수, β1: MPP-Aβ40의 계수, β2: MMSE(Z) 스코어의 계수, β3: 헤모글로빈의 계수, x1: MPP-Aβ40 값, x2: MMSE(Z) 스코어 값 및 x3: 헤모글로빈 수치)[수식 2]; 및4) 상기 정보처리부로부터 연산된 결과를 출력하는 정보출력부로 구성된, 임상학적 및 병리학적 알츠하이머병 예측 및 진단시스템.
- 제 1항 또는 제 2항의 조성물을 포함하는 혈액 수집 장치.
- 제 14항에 있어서, 혈액응고 방지제를 추가로 포함하는 혈액 수집 장치.
- 피검자의 혈액으로부터 분리한 혈장을 수집하여 보관하는, 제 1항 또는 제 2항의 조성물을 포함하는 혈장 수집 장치.
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| KR102634018B1 (ko) * | 2021-12-15 | 2024-02-05 | 가톨릭대학교 산학협력단 | 인지장애 환자의 아밀로이드 pet 양성 예측 모델 및 이를 이용한 예측 방법 |
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