WO2014050160A1 - 動的ネットワークバイオマーカーの検出装置、検出方法及び検出プログラム - Google Patents
動的ネットワークバイオマーカーの検出装置、検出方法及び検出プログラム Download PDFInfo
- Publication number
- WO2014050160A1 WO2014050160A1 PCT/JP2013/053188 JP2013053188W WO2014050160A1 WO 2014050160 A1 WO2014050160 A1 WO 2014050160A1 JP 2013053188 W JP2013053188 W JP 2013053188W WO 2014050160 A1 WO2014050160 A1 WO 2014050160A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cluster
- factor
- index
- measurement data
- dnb
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B20/00—ICT specially adapted for functional genomics or proteomics, e.g. genotype-phenotype associations
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B20/00—ICT specially adapted for functional genomics or proteomics, e.g. genotype-phenotype associations
- G16B20/20—Allele or variant detection, e.g. single nucleotide polymorphism [SNP] detection
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B40/00—ICT specially adapted for biostatistics; ICT specially adapted for bioinformatics-related machine learning or data mining, e.g. knowledge discovery or pattern finding
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B20/00—ICT specially adapted for functional genomics or proteomics, e.g. genotype-phenotype associations
- G16B20/10—Ploidy or copy number detection
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B30/00—ICT specially adapted for sequence analysis involving nucleotides or amino acids
Definitions
- the present invention relates to a detection apparatus, a detection method, and a detection program for detecting a candidate for a biomarker that is an index of a symptom of a living body based on measurement data of a plurality of factor items obtained by measurement related to the living body.
- Non-Patent Documents 1 to 5 the progression process of disease deterioration (eg, asthma attack, cancer onset) is modeled as a time-dependent nonlinear dynamic system, and the modeled system is observed It has already been clarified that the disease rapidly deteriorates due to the phase transition at the branch point (see Non-Patent Documents 1 and 6).
- FIG. 1 is an explanatory diagram conceptually showing a disease progression process.
- FIG. 1a schematically illustrates the disease progression process.
- b, c, and d show the stability of the modeled system described above as a potential function in the course of the progress process, the horizontal axis indicates the time of progress, and the vertical axis indicates the value of the potential function.
- the progression process of disease deterioration can be expressed as a normal state (health state), a pre-disease state, and a disease state. In the normal state, the system is stable and the value of the potential function is the minimum value as shown by the position of the black circle in FIG.
- the system In the pre-disease state, the system has a high potential function value, as shown by the black circle position in FIG. Therefore, it is in a state that is easily affected by disturbance, and is located near the branch point where the phase transition occurs only by receiving a small disturbance, that is, at the limit of the normal state. However, the pre-disease state can be easily restored to a normal state by appropriate treatment. On the other hand, in a disease state, the system is stable, and the value of the potential function is a global minimum as shown by the black circle position in FIG. Therefore, it is difficult for this disease state caused by the phase transition from the normal state to recover to the normal state.
- the patient can be removed from the pre-disease state by taking appropriate measures. There is a high possibility that it can be restored to a normal state.
- a bifurcation point (critical threshold) can be detected, a critical transition can be predicted and early diagnosis of a disease can be realized.
- biomarkers have been used as methods for diagnosing disease states.
- Conventional biomarkers that have been used in the past include body fluids such as serum and urine collected from living bodies, as well as molecular level DNA, RNA, proteins, metabolites, etc. contained in tissues. It is an index that can quantitatively grasp the scientific change.
- the conventional method for diagnosing diseases using biomarkers is to compare the biomarkers extracted from normal samples (samples collected in a healthy state) with the biomarkers extracted from abnormal samples (samples collected in a disease state). It is a method of diagnosing.
- the pre-disease state is the boundary of the normal state, and it is difficult for significant changes to occur before reaching the bifurcation point. Therefore, it is difficult to distinguish between the normal state and the pre-disease state in the diagnosis by the conventional technique such as biomarker and snapshot measurement.
- the target of the pre-disease state is the patient, and usually the number of samples obtained from a single patient is limited, making it difficult to obtain sufficient samples for prediction over a long period of time. It is.
- a conventional method for diagnosing a disease using a biomarker is a method of making a diagnosis by comparing a normal state and a disease state, and at the time of diagnosis, the patient has already entered a disease state and has returned to the previous normal state. It is difficult to go back.
- the present invention provides a detection device, a detection method, and a detection program that can detect a pre-disease state before transitioning to a disease state, and further, a disease model is unnecessary and diagnosis is performed with only a few biological samples.
- An object of the present invention is to provide a detection device or the like that can assist.
- the detection apparatus is a biomarker candidate serving as an index of a symptom of a living body to be measured based on measurement data on a plurality of factor items obtained by measurement related to a living body.
- a classifying unit that classifies a plurality of factor items into a plurality of clusters based on a correlation of time-series changes of respective measurement data of each factor item, and from each classified cluster,
- a selection means for selecting a cluster corresponding to a selection condition set in advance based on the correlation between the time series change of each measurement data of each factor item and the time series change of the measurement data between each factor item, and the selected cluster
- Detecting means for detecting a factor item included in the biomarker candidate as a biomarker candidate.
- the detection device having the above-described features can detect a biomarker candidate serving as a warning signal indicating a pre-disease state before transitioning from a normal state to a disease state. Moreover, if the biomarker can be specified, the pre-disease state can be determined by collecting only a few samples from the detection target.
- the selecting means includes means for calculating an average value of values indicating the correlation of measurement data between the factor items in the cluster as a first index, and measurement of the factor items in the cluster.
- Means for calculating an average value of correlation values between the data and the measurement data of the factor items outside the cluster as a second index, and an average value of the standard deviation of the measurement data for each factor item in the cluster Means for calculating as an index, and a cluster including a factor item to be a biomarker is selected from a plurality of clusters based on the first index, the second index, and the third index.
- the characteristics of each cluster can be quantitatively evaluated, and biomarkers can be easily selected.
- the selecting means selects a cluster having a maximum total index based on a product of the first index, the second index, and the reciprocal of the third index.
- the detection apparatus further comprises a differential test means for testing whether each measurement data of each factor item changes with time with significance, and the classification means includes It classifies about the factor item tested that there is significance in a change.
- biomarker candidates can be efficiently detected from a large amount of measurement data by selecting factor items that show a significant change over time.
- the detection apparatus is characterized in that the differential test means is based on the measurement data of each factor item and a comparison result with reference data preset for each factor item and time series. It is characterized by performing such a test.
- a biological sample serving as a reference standard is acquired as reference data, so that the measurement data is compared with the reference data, and the disturbance is eliminated and detected. It can be performed.
- the detection device calculates, for each factor item, a reference standard deviation indicating an average value of standard deviations of corresponding reference data, and a reference correlation value indicating an average value of values indicating correlation between factor items.
- Means for detecting wherein the first index increases significantly with respect to the reference standard deviation, the second index decreases with significance with respect to the reference correlation value, and When the third index increases with significance compared to the reference standard deviation, an item included in the cluster is detected as a biomarker candidate.
- the selected factor item is appropriate as a biomarker.
- the detection means includes means for testing the significance of a plurality of factor items included in the cluster based on the statistical value of the measurement data. Is detected as a candidate for a biomarker.
- any one of the plurality of factor items is a measurement item related to a gene, a measurement item related to a protein, a measurement item related to a metabolite, or a measurement item related to an image obtained from a living body.
- the detection method according to the present invention includes a detection device that detects a candidate for a biomarker that is an index of a symptom of a living body that is a measurement target, based on measurement data for a plurality of factor items obtained by measurement related to the living body.
- the detection device classifies a plurality of factor items into a plurality of clusters based on a correlation of time series changes of measurement data of each factor item, and classifies each of the classified items.
- the detection method is a detection method for detecting a candidate for a biomarker that is an index of a symptom of a living body that is a measurement target, based on measurement data for a plurality of factor items obtained by measurement related to a living body.
- a molecular screening step for calculating differential biomolecules and highly correlated biomolecules as one cluster
- a clustering step for classifying the differential biomolecules selected in the molecular screening step into a plurality of clusters, and a plurality of clusters obtained in the clustering step among the biomolecules in the clusters.
- a candidate selection step that preempts a cluster having the most significant reduction in correlation between a child and another biomolecule as a candidate for the biomarker, and whether the biomarker candidate selected in the candidate selection step is the biomarker. And a determination step of determining whether or not by a significance test.
- the detection method having the above characteristics can detect a biomarker candidate serving as a warning signal indicating a pre-disease state before a transition from a normal state to a disease state. Moreover, if the biomarker can be specified, the pre-disease state can be determined by collecting only a few samples from the detection target.
- the detection program detects a biomarker candidate serving as an index of a symptom of a living body to be measured based on measurement data on a plurality of factor items obtained by measurement related to a living body on a computer.
- a detection program for executing processing wherein a computer classifies a plurality of factor items into a plurality of clusters based on a correlation of time-series changes of respective measurement data of each factor item, and each classified
- the computer When the detection program having the above features is executed by a computer, the computer operates as the detection device according to the present invention. Therefore, it is possible to detect a biomarker candidate serving as a warning signal indicating a pre-disease state before transitioning from a normal state to a disease state. Moreover, if the biomarker can be specified, the pre-disease state can be determined by collecting only a few samples from the detection target.
- a diagnosis is performed by collecting a biological sample from a diagnosis target and examining whether the biomarker serving as a warning signal indicating a pre-disease state immediately before a disease state exists in the collected biological sample. Whether or not the subject is in a pre-disease state can be diagnosed. Therefore, it is not necessary to construct a disease deterioration model, and it is not necessary to specify a driving factor for disease deterioration, and early diagnosis of the disease can be realized at a stage before becoming a disease.
- FIG. 1 is a schematic diagram illustrating a disease progression process.
- FIG. 2 is a schematic view illustrating the dynamic characteristics of DNB according to the detection method of the present invention.
- FIG. 3 is a flowchart illustrating an example of the DNB detection method according to the embodiment.
- FIG. 4 is a flowchart illustrating an example of differential biomolecule selection processing according to the embodiment.
- FIG. 5 is a flowchart illustrating an example of DNB candidate selection processing according to the embodiment.
- FIG. 6 is a flowchart illustrating an example of DNB determination processing according to the embodiment.
- FIG. 7 is a diagram illustrating an example of a diagnosis schedule according to a disease early diagnosis method using DNB according to the embodiment.
- FIG. 8 is a flowchart illustrating an example of a disease early diagnosis method using DNB in the embodiment.
- FIG. 9 is an example of a graphic displaying a disease risk proportional to the overall index I.
- FIG. 10 is an example of a graphic displaying a disease risk proportional to the overall index I.
- FIG. 11 is a block diagram illustrating a configuration example of a detection device according to the present invention.
- FIG. 12 is a flowchart showing an example of DNB detection processing by the detection apparatus according to the present invention.
- FIG. 13 is a table showing diagnostic data in the first verification example.
- FIG. 14A is a graph illustrating an example of a time-series change in the average value of the standard deviations of the detected DNB candidates in the first verification example.
- FIG. 14B is a graph illustrating an example of a time-series change in the average value of the absolute values of the Pearson correlation coefficients between members of the detected candidate cluster of the DNB in the first verification example.
- FIG. 14C is a graph showing an example of a time-series change in the average value of the absolute values of the Pearson correlation coefficients between members of the detected DNB candidate cluster and other genes in the first verification example.
- FIG. 14D is a graph illustrating an example of a time-series change in the average value of the overall indexes of the detected DNB candidates in the first verification example.
- FIG. 15 is a map showing an example of dynamic characteristics of DNB over time in a network configured by case group genes in the first verification example.
- FIG. 16 is a table of diagnostic data in the second verification example.
- FIG. 17A is a graph illustrating an example of a time-series change in an average value of standard deviations of detected DNB candidates in the second verification example.
- FIG. 17B is a graph illustrating an example of a time-series change in the average value of the absolute values of the Pearson correlation coefficients between the members of the detected candidate cluster of the DNB in the second verification example.
- FIG. 17C is a graph showing an example of a time-series change in the average absolute value of the Pearson correlation coefficient between a member of a detected candidate cluster of DNB and another gene in the second verification example.
- FIG. 17D is a graph illustrating an example of a time-series change in the average value of the total indexes of the detected DNB candidates in the second verification example.
- the inventors of the present invention utilize genomic high-throughput technology capable of obtaining thousands of information, that is, high-dimensional data, from one sample, and based on the bifurcation process theory, A mathematical model was constructed to study the progression mechanism of disease deterioration at the molecular network level.
- a dynamic network biomarker DNB: Dynamical Network Biomarker
- DNB Dynamical Network Biomarker
- system (1) a system related to a disease progression process
- P is a slowly changing parameter that drives the state transition of the system (1). For example, genetic factors such as SNP (Single Nucleotide Polymorphism), CNV (Copy Number Variation), non-methylation, acetylation, etc. It can be information such as genetic factors.
- f (f1,..., fn) is a nonlinear function of Z (k).
- the inventors of the present invention focused on the critical transition state of the system immediately before the transition from the normal state to the disease state, that is, the pre-disease state.
- the system (1) has an equilibrium point having the following characteristics.
- the inventors theoretically clarified from the above characteristics that when the system (1) enters a critical transition state, the following unique characteristics appear. That is, when the system (1) is in a critical transition state, a control group (sub-group) composed of some nodes in the network (1) in which each variable z1,..., Zn of the system (1) is configured as a node. Network) appears.
- the dominant group appearing in the critical transition state ideally has the following characteristics.
- PCC (zi, zj) is a Pearson correlation coefficient between zi and zj
- SD (zi) and SD (zj) are standard deviations between zi and zj.
- the appearance of the dominant group having the above-mentioned unique characteristics (I) to (III) is taken as an indication that the system (1) is transitioning to a critical transition state (pre-disease state). be able to. Therefore, the critical transition of the system (1) can be detected by detecting the dominating group. That is, the control group can be a warning signal indicating a critical transition, that is, a pre-disease state immediately before a disease worsening. Then, no matter how complicated the system (1) is, even if the driving element is unknown, if only the dominant group that becomes the warning signal is detected, the mathematical model of the system (1) is not handled directly, It is possible to identify the pre-disease state. By specifying the pre-disease state, it is possible to realize advance measures and early treatment for the disease.
- the control group serving as a warning signal indicating a pre-disease state is referred to as a dynamic network biomarker (hereinafter abbreviated as DNB).
- DNB dynamic network biomarker
- the DNB is a dominating group having unique characteristics (I) to (III).
- the DNB is a network ( Appears in 1).
- the network (1) if each node (z1,..., Zn) is a factor item to be measured for a biomolecule such as a gene, protein, metabolite, etc., the DNB has the unique characteristic (I )
- To (III) is a group (subnetwork) composed of factor items related to some biomolecules.
- conditions for determining DNB can be determined as follows.
- Condition (I) a group consisting of some biomolecules (genes, proteins or metabolites) existing in the network (1), and the absolute value of the Pearson correlation coefficient PCC between the biomolecules in the group The average value of increases significantly.
- Condition (II) The average absolute value of the Pearson correlation coefficient OPCC between the biomolecules in the group and other biomolecules is significantly reduced.
- Condition (III) The average value of the standard deviation SD of the biomolecules in the group is significantly increased.
- a group consisting of biomolecules that simultaneously satisfy the conditions (I) to (III) for determining the DNB is recognized as a DNB.
- FIG. 2 is a schematic view illustrating the dynamic characteristics of DNB according to the detection method of the present invention.
- FIG. 2a shows a normal state, a pre-disease state, and a disease state as disease progression processes.
- B, c and d in FIG. 2 show the stability of the modeled system (1) as a potential function in the normal state, the pre-disease state and the disease state with respect to the progress process, and the horizontal axis shows the course. It is the graph which took time and took the value of the potential function on the vertical axis, and showed conceptually.
- FIG. 2 has shown notionally the example of the network state of the system (1) corresponding to each of a normal state, a pre-disease state, and a disease state. Further, h in FIG. 2 shows an example of the temporal change in the molecular concentration that is a factor item of DNB in the pre-disease state.
- Nodes z1 to z6 represent factor items relating to different types of biomolecules such as genes, proteins, and metabolites
- the connection lines between the nodes z1 to z6 indicate the correlation between the nodes.
- the size indicates the size of the Pearson correlation coefficient PCC
- the drawing method of circles surrounding z1 to z6 indicates the size of the standard deviation SD of each node.
- the standard deviation SD is the smallest when the circle is blank, and the standard deviation SD is larger as the slanted line in one direction and the slanted line in two directions.
- each node In the normal state, as shown in FIG. 2e, each node is at an intermediate level where the mutual correlation and the respective standard deviations are equal.
- groups (z1 to z3) that show significantly unique characteristics appear compared to other nodes.
- Nodes z1 to z3 in the group have a significantly increased Pearson correlation coefficient between the nodes z1 to z6 and a significant decrease in the Pearson correlation coefficient with the other nodes z4 to z6, as shown in FIG. Yes.
- the standard deviations of the nodes z1 to z3 in the group are slightly larger, but the Pearson correlation coefficient between the nodes is equal. Returning to the middle level. That is, the unique characteristics of the group (z1 to z3) are lost.
- DNB Dynamic Network Biomarker
- DNB can be used for early diagnosis of a disease as a warning signal indicating a pre-disease state.
- the average value of the absolute value of the Pearson correlation coefficient PCC between the nodes in the DNB described above, and the absolute value of the Pearson correlation coefficient OPCC between the node in the DNB and another node are used.
- the standard deviation SD of DNB can be used.
- an overall index I represented by the following formula (2) is introduced.
- Equation (2) PCCd represents the average value of the absolute value of the Pearson correlation function between the nodes in the DNB, and OPCCd represents the average value of the absolute value of the Pearson correlation coefficient between the node in the DNB and another node.
- SDd represents an average value of standard deviations of nodes in the DNB.
- FIG. 3 is a flowchart illustrating an example of the DNB detection method according to the embodiment.
- the detection method of the present invention first, it is necessary to obtain measurement data by measurement related to a living body. If a high-throughput technique such as a DNA chip is used, 20,000 or more genes can be measured from one biological sample.
- a high-throughput technique such as a DNA chip
- 20,000 or more genes can be measured from one biological sample.
- a plurality (6 or more) of biological samples are collected at different time points from the measurement target, and the measurement data obtained by measuring the collected biological samples are aggregated and statistically collected. Get the data.
- the DNB detection method mainly includes a high-throughput data acquisition process (s1), a differential biomolecule selection process (s2), a clustering process (s3), as shown in FIG. , DNB candidate selection processing (s4), and DNB determination processing (s5) by significance analysis. Next, each of these processes will be described in detail.
- the sample to be detected is a case sample
- the reference sample is a control sample
- physiological data using each high-throughput technique that is, a biomolecule
- the reference sample is a sample such as a sample collected in advance from a patient to be examined or a sample collected first at the time of collection, and is used as a control sample having a purpose such as calibration of a measuring apparatus.
- a control sample is not necessary, but is useful for eliminating error factors and improving measurement reliability.
- the selection process of the differential biomolecule in step s2 is a process of selecting a biomolecule that showed a significant change in the expression level.
- FIG. 4 is a flowchart illustrating an example of differential biomolecule selection processing according to the embodiment.
- FIG. 4 shows in detail the biological treatment of the differential biomolecule in step s2 shown in FIG.
- step s22 Student's t-test is exemplified as a method for selecting the biomolecule D2c showing a significant change in the expression level, but the method is not particularly limited.
- the value of the significance level ⁇ can be appropriately set to a value such as 0.05 or 0.01.
- each case sample biomolecule D2c is corrected for multiple comparisons (multiple comparisons) or t-tests of multiple students, and each case sample gene after correction is corrected.
- protein data D3c is selected (s23).
- the Dc whose standard deviation SD changes relatively remarkably from each case sample gene or protein data D3c after correction is selected as a differential biomolecule.
- the differential biomolecule Dc selected here not only shows a significant difference compared to the biomolecule Dr of the control sample, but also deviates greatly from its own average value.
- the test method is not limited to the student t test.
- the clustering process here is a process of classifying a plurality of biomolecules into groups highly correlated with each other, and each group into which biomolecules are classified is referred to as a cluster. That is, the differential biomolecule Dc selected in step s24 shown in FIG. 4 is classified into n clusters so that biomolecules highly correlated with each other are made into one cluster. All the resulting clusters are potential dominating groups, ie, candidates for DNB to be detected.
- FIG. 5 is a flowchart illustrating an example of DNB candidate selection processing according to the embodiment.
- FIG. 5 shows details of the DNB candidate selection process in step s4 shown in FIG. That is, the DNB candidate selection process is performed based on the flowchart of the DNB candidate selection process shown in FIG. In the cyclic loop shown in FIG.
- the clusters calculate the mean value OPCCd (k) of the absolute value of the Pearson correlation function between the nodes in the cluster and other nodes, the mean value SDd (k) of the standard deviation of the nodes in the cluster, and the overall index I (k) (S41 to s46). Then, the cluster having the largest overall index I value is selected from all the clusters as a DNB candidate (s47).
- FIG. 6 is a flowchart illustrating an example of DNB determination processing according to the embodiment.
- FIG. 6 shows details of the DNB determination processing by the superiority analysis in step s5 shown in FIG. That is, based on the above-described DNB determination conditions (I) to (III), it is determined whether or not the cluster (m) selected as a DNB candidate in step s47 is a DNB.
- the processing is performed based on the flowchart of the DNB determination processing shown in FIG.
- the average value PCCdr of the absolute value of the Pearson correlation coefficient between the nodes of the data acquired from the control sample and the average value SDdr of the standard deviation of each node are calculated (s51, s52). ). Then, compared with the average value PCCdr of the Pearson correlation coefficient of the control sample, the average value PCCd (m) of the absolute value of the Pearson correlation coefficient between the nodes in the cluster (m) selected in step s47 is significantly increased. It is determined whether or not (s53). If it is determined that there is no significant increase (NO), a result that there is no DNB is output, and the process is terminated (s57).
- step s54 whether the average value OPCCd (m) of the Pearson correlation coefficient between each node in the cluster (m) and another node is significantly reduced as compared to the average value PCCdr of the Pearson correlation coefficient of the control sample It is determined whether or not (s54). If it is determined that there is no significant reduction (NO), a result indicating that there is no DNB is output (s57), and the process is terminated. On the other hand, if it is determined that it has been significantly reduced (YES), the process proceeds to the next step s55.
- step s55 it is determined whether or not the standard deviation average value SDd (m) of the nodes in the cluster (m) has significantly increased compared to the standard deviation average value SDr of the control sample. If it is determined that there is no significant increase (NO), it is determined that there is no DNB (s57), and the process is terminated. On the other hand, if it is determined that it has increased significantly, the cluster (m) is recognized as DNB (s56), and the process is terminated.
- FIG. 7 is a diagram illustrating an example of a diagnosis schedule for early diagnosis of a disease using DNB in the embodiment.
- samples are taken at a plurality of stages (stage-1, stage-2,..., Stage-T).
- stage-1, stage-2,..., Stage-T stages
- the interval between two successive stages can be set as long as days, weeks, months or years depending on the disease situation, but each stage takes samples at different time points in a short period of time. It is desirable to do.
- 6 samples are taken at 6 time points of the day.
- the interval between each time point can be, for example, several minutes or several hours depending on the situation.
- FIG. 8 is a flowchart showing an example of an early diagnosis method of disease by DNB in the embodiment.
- the disease early diagnosis method using DNB mainly includes a sample collection process (s100), a differential biomolecule selection (s200), a DNB candidate selection process (s300), A DNB determination process based on significance analysis (s400) and a diagnosis result output process (s500) are included.
- s100 sample collection process
- s200 differential biomolecule selection
- s300 DNB candidate selection process
- s400 DNB determination process based on significance analysis
- s500 diagnosis result output process
- Sample collection processing Similar to a general disease diagnosis method, a sample for collecting necessary physiological data is collected according to the disease to be diagnosed. For example, in the case of liver damage, samples such as blood and liver tissue are collected.
- a sample collected from the diagnosis target when making a diagnosis is a control sample. It can be.
- differential biomolecule s200: According to the differential biomolecule selection process flowchart shown in FIG. 4, a differential biomolecule is selected from the sample collected in step s100.
- DNB candidate selection process (s300): According to the DNB candidate selection flowchart shown in FIG. 5, a dominant group that is a candidate for DNB is selected from the differential biomolecules selected in step s200.
- DNB determination process by significance analysis (s400): According to the flowchart showing the DNB determination method by significance analysis shown in FIG. 6, it is determined whether or not the DNB candidate selected in step s300 is a DNB. .
- Diagnosis result output (s500): If it is determined in step s400 that there is no DNB, the DNB candidate data selected in step s300 is stored in the storage device as reference data for the next diagnosis, and an abnormality is recognized. Outputs the diagnostic result to the effect. On the other hand, if it is determined in step s400 that there is a cluster certified as a DNB, the biomolecule data of the certified cluster is stored as a member of the DNB, and a diagnosis result indicating that it is in a pre-disease state is output. In addition, a diagnosis result associated with the detected DNB can be output. In addition, although shown as a diagnosis result here, it is a result used as a reference of the diagnosis by a doctor. That is, the diagnosis result output in step s500 is not diagnosis by the doctor itself but output data that serves as a reference for diagnosis in order to support diagnosis as an aid to the diagnosis of the doctor.
- a comprehensive index I that comprehensively reflects the characteristics of DNB can be output as a diagnosis result.
- FIG. 9 and FIG. 10 are examples of figures that display the disease risk proportional to the overall index I.
- the entire arrow indicates the pre-disease state (pre-morbidity)
- the flow in the direction indicated by the arrow indicates the temporal change of the disease state (onset)
- the diamond mark located on the left side of the arrow indicates diagnosis. It is a disease risk pointer whose position changes according to the value of the obtained overall index I. The larger the value of the overall index I is, the larger the diamond mark is set to approach the right side of the arrow.
- the dotted rhombus marks indicate the total index obtained by the diagnosis on July 1, 2011, and the solid rhombus marks indicate the total index obtained by the diagnosis on September 1, 2011. It is possible to intuitively determine that the disease state is approached from the positional change of the rhombus mark.
- a map of all networks including the detected DNB or a part of the network including the DNB (for example, FIG. 15 described later) can be output.
- DNB appears in a pre-disease state that transitions from a normal state to a disease state, but a biomolecule detected as DNB, that is, a gene, protein, or metabolite itself is not necessarily a factor that exacerbates the disease. It is not necessarily a pathological gene, protein, or metabolite. However, some DNB members have been found to be associated with disease.
- a substance (gene, protein or metabolite) related to a specific disease contained in the detected member of DNB is extracted, for example, a diagnosis subject such as a examiner may develop due to a doctor's diagnosis. A certain degree of sexual disease can be grasped.
- a database storing the correspondence between genes, proteins or metabolites and diseases is used to detect the relationship between the detected DNB and the disease.
- a gene, protein, or metabolite can be extracted and output as a diagnostic result that serves as a reference for diagnosis.
- FIG. 11 is a block diagram illustrating a configuration example of a detection device according to the present invention.
- the detection apparatus 1 shown in FIG. 11 is realized using a personal computer, a client computer connected to a server computer, and other various computers.
- the detection apparatus 1 includes various mechanisms such as a control unit 10, a recording unit 11, a storage unit 12, an input unit 13, an output unit 14, and an acquisition unit 15.
- the control unit 10 is configured using a circuit such as a CPU (Central Processing Unit) and is a mechanism that controls the entire detection apparatus 1.
- a CPU Central Processing Unit
- the recording unit 11 is a non-volatile auxiliary recording mechanism such as a magnetic recording mechanism such as an HDD (Hard Disk Disk Drive) or a non-volatile semiconductor recording mechanism such as an SSD (Solid State Disk).
- the recording unit 11 records various programs and data such as the detection program 11a according to the present invention.
- the storage unit 12 is a volatile main storage mechanism such as SDRAM (Synchronous Dynamic Random Access Memory), SRAM (Static Random Access Memory) or the like.
- SDRAM Serial Dynamic Random Access Memory
- SRAM Static Random Access Memory
- the input unit 13 is an input mechanism including hardware such as a keyboard and a mouse, and software such as a driver.
- the output unit 14 is an output mechanism including hardware such as a monitor and a printer, and software such as a driver.
- the acquisition unit 15 is a mechanism for acquiring various data from the outside. Specifically, these are various hardware such as a LAN (Local Area Network) port for capturing data via a communication network, a port connected to a dedicated line such as a parallel cable connectable to a measuring device, and software such as a driver. .
- LAN Local Area Network
- the computer executes various procedures related to the detection program 11a. It functions as the detection device 1.
- storage part 12 both have the same function of recording various information, and which mechanism is made to record according to a specification, an operation form, etc. of an apparatus? Can be determined as appropriate.
- FIG. 12 is a flowchart showing an example of DNB detection processing by the detection apparatus 1 according to the present invention.
- the process of the detection apparatus 1 according to the present invention executes the above-described DNB detection process.
- the control unit 10 of the detection apparatus 1 uses the acquisition unit 15 to acquire measurement data for a plurality of factor items obtained by measurement related to the living body (Sc1).
- Step Sc1 corresponds to the high-throughput data acquisition process shown as step s1 in FIG.
- the factor item here refers to a measurement item related to a gene that can be a node of the above-mentioned DNB, a measurement item related to a protein, and a metabolite. Measurement items such as measurement items are shown. It is also possible to use measurement items related to images obtained from in-vivo images output by a measurement device such as a CT scan.
- Step Sc2 corresponds to the differential biomolecule selection process shown as step s2 in FIG.
- the control unit 10 performs a test on significance based on the measurement data of each factor item and the comparison result with the factor item and reference data set in advance for each time series ( Sc21) includes a process (Sc22) for selecting a factor item that has been tested to be significant over time. That is, the various processes shown in FIG. 4 are executed.
- the data processed as reference data by the detection device 1 is a control sample.
- the detection device 1 uses the reference data for the sample based on the setting such that the first acquired sample is a control sample. As the handling.
- the control unit 10 classifies the plurality of factor items into a plurality of clusters based on the correlation of the time series changes of the respective measurement data of each selected factor item (Sc3).
- Step Sc3 corresponds to the clustering process shown as step s3 in FIG.
- the control unit 10 corresponds to a selection condition set in advance from each classified cluster based on the correlation between the time series change of each measurement data of each factor item and the time series change of the measurement data between each factor item.
- a cluster is selected (Sc4).
- Step Sc4 corresponds to the DNB candidate selection process shown as step s4 in FIG.
- the control unit 10 calculates, for each cluster, the average value of the values indicating the correlation of the measurement data of each factor item in the cluster as the first index (Sc41). An average value of values indicating correlation between the measurement data of the factor item and the measurement data of the factor item outside the cluster is calculated as a second index (Sc42), and the standard deviation of the measurement data for each factor item in the cluster is calculated.
- the process (Sc43) which calculates an average value as a 3rd index
- the control unit 10 calculates a comprehensive index based on the product of the first index, the second index, and the reciprocal of the third index (Sc44), and the calculated total index is the maximum.
- a process of selecting a cluster is included. That is, various processes shown in FIG. 5 are executed.
- the first index, the second index, the third index, and the overall index for example, the average value PCCd (k) of the absolute value of the Pearson correlation coefficient between the nodes in the cluster, The average value OPPCd (k) of the absolute value of the Pearson correlation function between the nodes, the average value SDd (k) of the standard deviation of the nodes in the cluster, and the overall index I (k) are used.
- the control unit 10 detects factor items included in the selected cluster as biomarker candidates (Sc5).
- Step Sc5 corresponds to the DNB determination process shown as step s5 in FIG.
- the control unit 10 calculates the reference standard deviation indicating the average value of the standard deviation of the corresponding reference data for each factor item (Sc51), and averages the values indicating the correlation between the factor items.
- a reference correlation value indicating the value is calculated (Sc52).
- the first index increases with significance compared to the reference standard deviation
- the second index decreases with significance compared to the reference correlation value
- the third index increases with significance compared to the reference standard deviation.
- a process (Sc53) of detecting an item included in the cluster as a biomarker is included. That is, various processes shown in FIG. 6 are executed.
- the reference standard deviation and the reference correlation value for example, the average value PCCdr of the absolute value of the Pearson correlation coefficient between the nodes and the average value SDdr of the standard deviation of each node are used.
- control part 10 outputs the factor item detected as a biomarker candidate from the output part 14 (Sc6), and complete
- the diagnosis method of the present invention is used for diagnosis using the experimental data of the mouse in which the lung injury is caused, and the diagnosis result is used as the actual medical condition Compared with the progress, the effectiveness of the diagnostic method of the present invention was verified.
- the experimental data is divided into a group of experiments and a control group of CD-1 male mice.
- the case group is in a normal air environment, and the control group is in an air environment containing phosgene, a toxic gas. It was obtained from an experiment to observe the health status of both groups of mice and investigate the molecular mechanisms of acute lung injury from phosgene inhalation.
- the health status of mice in case groups exposed to phosgene was diagnosed using the diagnostic method of the present invention. Normally, mice inhal a certain amount of phosgene and develop phosgene-induced lung injury.
- FIG. 13 is a table showing diagnostic data in the first verification example.
- the diagnosis object is a mouse (CD-1 male mouse) suffering from phosgene-induced lung injury
- the sample collection object is a mouse of a case group to be a diagnosis object and a control group to be a reference object.
- the sampling point is the time point when 0, 0.5, 1, 4, 8, 12, 24, 48, 72 hours have elapsed since the start of the experiment, and the sampling point of the gene used for the detection of DNB The number is 22690.
- differentially expressed genes are selected from high-throughput gene data measured from each sample. At each sampling point, six case samples and six control samples are provided. At the first sampling point (0h), the case sample data is the same as the control sample data.
- the selected gene set B was clustered by collecting highly correlated ones into one cluster at each sampling point, and 40 clusters were obtained.
- the cluster with the largest overall index I is selected as a DNB candidate from each cluster in the calculated case group, and the average value of the standard deviation of the control group is selected for the DNB candidate.
- SDc the average value of the Pearson correlation coefficient between genes, whether or not it is DNB is determined by significance analysis.
- PCCc the average value of the Pearson correlation coefficient between genes
- DNB was detected at the fifth sampling point (8h), and the DNB is the 111th cluster having 220 genes.
- FIG. 14A is a graph showing an example of a time-series change in the average value SDd of the standard deviations of the detected DNB candidates in the first verification example.
- FIG. 14B is a graph illustrating an example of a time-series change in the average value PCCd of the absolute values of the Pearson correlation coefficients between members of the detected candidate cluster of the DNB in the first verification example.
- FIG. 14C is a graph showing an example of a time-series change in the average value OPCCd of the absolute value of the Pearson correlation coefficient between a member of the detected candidate cluster of DNB and another gene in the first verification example. is there.
- FIG. 14D is a graph showing an example of a time-series change of the overall index I of the detected DNB candidates in the first verification example.
- the horizontal axis represents the time stage t
- the vertical axis represents the average value SDd of the standard deviation (FIG. 14A), the average value PCCd of the absolute value of the Pearson correlation coefficient between the members of the cluster, respectively.
- FIG. 14B shows the average value OPCCd (FIG. 14C) of the absolute value of the Pearson correlation coefficient between cluster members and other genes, and the overall index I (FIG. 14D).
- the broken line shows the change with time of various indexes of DNB candidates detected from the case group, and the solid line shows the change with time of various indexes of one cluster selected from the control group.
- the fourth time stage ie, after 4 hours
- the first index PCCd, the third index SDd, and the overall index I of the DNB candidates start to increase greatly
- the peak is reached at the time stage (ie, after 8 hours).
- the third index OPCCd of the DNB candidate decreases from the second time stage, and shows a minimum value at the same fifth time stage (ie, 8 hours have elapsed).
- FIG. 15 is a map showing an example of dynamic characteristics of DNB over time in a network configured by case group genes in the first verification example.
- FIG. 15 shows the gene network of the case group (3452 genes, 9238 links) at each sampling point of 0.5, 1, 4, 8, 12, 24, 48, 72h in order.
- a node indicated by “ ⁇ ” is a gene belonging to a DNB candidate
- a node indicated by “ ⁇ ” is another gene in the vicinity of the candidate node for DNB
- a node between nodes The line shows the correlation between both nodes.
- the color density of “ ⁇ ” indicates the magnitude of the standard deviation SD of the gene
- the density of the connection line of both nodes indicates the magnitude of the absolute value of the correlation coefficient PCC of both nodes.
- DNB candidate characteristics change over time, and gradually evolve from a normal cluster that behaves the same as other genes to a DNB.
- SD DNB candidate characteristics
- PCC pre-disease state defect
- mice developed pulmonary edema 8 hours after inhalation of phosgene, 50% to 60% died 12 hours later, and another 60% after 24 hours. ⁇ 70% died.
- ⁇ Second verification example> In the first verification example described above, the effectiveness of the method for early diagnosis of diseases by DNB of the present invention was verified using data from animal experiments. In this verification example, the diagnostic accuracy of the method for early diagnosis of disease by DNB of the present invention is further verified using clinical data of B cell lymphoma.
- FIG. 16 is a table listing diagnosis data in the second verification example.
- the samples were resting (P1), active (P2), critical (P3), metastatic (P4), aggressive (P5 ) Is divided into groups of five stages.
- the number of samples is 5, 3, 6, 5, 7 respectively.
- the splenomegaly is “None”, “None”, “+/ ⁇ ”, “+”, “++++”, respectively.
- the flow cytometry is “normal rest”, “normal activity”, “abnormal”, “mixed”, and “B-1 clone”, respectively.
- a sample collected in the rest period (P1) is used as a control sample, and samples collected in other stages (P2 to P5) are used as case samples.
- FIGS. 17A to 17D show indexes of DNB candidates detected from case group genes.
- FIG. 17A is a graph showing an example of a time-series change in the average value SDd of the standard deviations of the detected DNB candidates in the second verification example.
- FIG. 17B is a graph illustrating an example of a time-series change in the average value PCCd of the absolute values of the Pearson correlation coefficients between members of the detected candidate cluster of the DNB in the second verification example.
- FIG. 17A is a graph showing an example of a time-series change in the average value SDd of the standard deviations of the detected DNB candidates in the second verification example.
- FIG. 17B is a graph illustrating an example of a time-series change in the average value PCCd of the absolute values of the Pearson correlation coefficients between members of the detected candidate cluster of the DNB in the second verification example.
- FIG. 17C is a graph showing an example of a time-series change in the average value OPCCd of the absolute value of the Pearson correlation coefficient between the member of the detected candidate cluster of DNB and another gene in the second verification example. is there.
- FIG. 17D is a graph illustrating an example of a time-series change in the overall index I of the detected DNB candidates in the second verification example.
- the horizontal axis indicates the number of the stage (P1 to P4), and the vertical axis indicates the mean value SDd of the standard deviation (FIG. 17A) and the Pearson correlation coefficient between the cluster members, respectively.
- Average value PCCd of absolute values (FIG. 17B), average value OPCCd of absolute values of Pearson correlation coefficients between cluster members and other genes (FIG. 17C), and overall index I are shown (FIG. 17D). .
- the diagnosis result shows that there is no abnormality.
- a warning signal indicating a pre-disease state was detected in the active period, so that a diagnosis result that “a sign of abnormality is seen” is obtained. Can tell the patient. Therefore, the patient stops the worsening of the medical condition by taking treatment measures at an early stage.
- the DNB according to the present invention can not only notify a patient of an abnormality at an early stage as a warning signal indicating a pre-disease state, but also can specifically identify a gene associated with the disease. It seems to be very useful for the treatment of complex diseases and pharmaceuticals.
- the above embodiment discloses only a part of the myriad examples of the present invention, and the design can be appropriately changed in consideration of various factors such as the type of disease and the purpose to be detected. is there.
- various measurement data can be used as long as it is information obtained by measurement related to a living body.
- the measurement data is not limited to the measurement data related to the genes, proteins, and metabolites described above, but is converted into measurement data by quantifying various situations of each part based on in-vivo images output by a measurement device such as a CT scan. It is possible to use.
- a measurement device such as a CT scan.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Medical Informatics (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Biophysics (AREA)
- Bioinformatics & Computational Biology (AREA)
- Evolutionary Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Genetics & Genomics (AREA)
- Databases & Information Systems (AREA)
- Public Health (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Data Mining & Analysis (AREA)
- Artificial Intelligence (AREA)
- Epidemiology (AREA)
- Evolutionary Computation (AREA)
- Bioethics (AREA)
- Software Systems (AREA)
- Immunology (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Urology & Nephrology (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
Abstract
Description
先ず、本発明の基となる理論根拠について説明する。通常、疾病の進行プロセスに係るシステム(以下、システム(1)という)を次の式(1)で表すことができる。
2. Pcをシステムが分岐する閾値とすれば、P=Pcの時、ヤコビ行列∂f(Z;Pc)/∂Z|Z=Z* の1つの実数固有値又は1対の複素共役の固有値の絶対値が1になる、
3. P≠Pcの時、一般的に、システム(1)の固有値の絶対値が1ではない。
PCC(zi,zj)→±1;
SD(zi)→∞;
SD(zj)→∞.
(II) ziは支配グループに属するノードであるが、zjは支配グループに属するノードではない場合、
PCC(zi,zj)→0;
SD(zi)→∞;
SD(zj)→境界値.
(III) ziとzjは支配グループに属するノードではない場合
PCC(zi,zj)→α、α∈(-1,1)\{0};
SD(zi)→境界値;
SD(zj)→境界値.
上述したように、DNBは、特異な特性(I)~(III)を有する支配グループであって、複数のノードからなるサブネットワークとして、システム(1)が疾病前状態になるときに、ネットワーク(1)に現れるものである。ネットワーク(1)において、各ノード(z1,... ,zn)を、遺伝子、タンパク質、代謝物等の生体分子について測定の対象となる因子項目とすれば、DNBは、上記特異な特性(I)~(III)を満たした一部の生体分子に係る因子項目からなるグループ(サブネットワーク)である。
・条件(II):当該グループ内の生体分子と他の生体分子との間のピアソン相関係数OPCCの絶対値の平均値が著しく低減する。
・条件(III):当該グループ内の生体分子の標準偏差SDの平均値が著しく増加する。
上述したように、DNBは、疾病前状態を示す警告信号として、疾病の早期診断に使用することができる。当該警告信号の強度を測るものとして、上述したDNB内のノード間のピアソン相関係数PCCの絶対値の平均値、DNB内のノードと他のノードとの間のピアソン相関係数OPCCの絶対値の平均値、及びDNBの標準偏差SDを用いることができる。さらに、DNBの特性を総合的に反映することができる総合指数Iを導入することができる。本発明において、一例として、次の式(2)で表す総合指数Iを導入する。
図3は、実施の形態におけるDNBの検出方法の一例を示すフローチャートである。本発明の検出方法においては、先ず、生体に関する測定により測定データを得ることが必要である。DNAチップ等のハイスループット技術を利用すれば、1つの生体サンプルから2万個以上の遺伝子を測定することができる。統計的に分析するために、本発明において、測定対象から複数(6個以上)の生体サンプルを異なる時間点で採取し、採取した生体サンプルを測定して得られた測定データを集計して統計データを取得する。本発明におけるDNBの検出方法は、主に、図3に示すように、ハイスループットデータの取得処理(s1)と、差次的生体分子の選出処理(s2)と、クラスター化処理(s3)と、DNBの候補の選出処理(s4)と、有意性分析によるDNBの判定処理(s5)とを含む。次に、これらの各処理について詳細に説明する。
診断スケジュールとしては、一定の間隔を開けて、複数回診断を行い、毎回の診断で数個のサンプルを取ることが望ましい。図7は、実施の形態におけるDNBを用いた疾病の早期診断の診断スケジュールの一例を示す図である。図7に示すように、複数の段階(段階-1、段階-2、…、段階-T)で、サンプルを採取する。各段階で採取するサンプルの数は、データの精度を確保するために、通常、1つの段階において、6個以上のサンプルを採取することが望ましい。2つの連続した段階の間の間隔は、疾病の状況によって、数日、数週間、数カ月、又は数年と長く設定することができるが、各段階では、短い期間において異なる時間点でサンプルを採取することが望ましい。例えば、6個のサンプルを1日のうちの6つの時間点で採取する。各時間点の間の間隔は、状況に応じて、例えば、数分間、数時間とすることができる。
以上詳述したDNBの検出方法は、コンピュータを用いた検出装置として本発明を具現化することができる。図11は、本発明に係る検出装置の構成例を示すブロック図である。図11に示す検出装置1は、パーソナルコンピュータ、サーバコンピュータに接続されるクライアントコンピュータ、その他各種コンピュータを用いて実現される。検出装置1は、制御部10、記録部11、記憶部12、入力部13、出力部14、取得部15等の各種機構を備えている。
本発明のDNBによる疾病の早期診断方法の診断精度を検証するために、肺障害が引き起こされたマウスの実験データを用いて、本発明の診断方法で診断を行い、その診断結果を実際の病状進行状況と比較して、本発明の診断方法の有効性を検証した。次に、当該検証例を詳細に説明する。実験データは、複数の実験用CD-1雄マウスをケースグループと、コントロールグループとに分けて、ケースグループを通常の空気環境に、コントロールグループを有毒ガスであるホスゲンが含まれている空気環境に置き、そして、両グループのマウスの健康状況を観察し、ホスゲンの吸入による急性肺損傷の分子レベルのメカニズムを調べるという実験から得られたものである。当該実験データを用いて、本発明の診断方法を用いて、ホスゲン曝露されているケースグループのマウスの健康状況を診断した。通常、マウスは一定量のホスゲンを吸入すると、ホスゲン誘発性肺障害を発症する。
上述した第1の検証例において、動物実験のデータを用いて、本発明のDNBによる疾病の早期診断方法の有効性を検証した。本検証例では、B細胞リンパ腫の臨床データを用いて、さらに、本発明のDNBによる疾病の早期診断方法の診断精度を検証する。
10 制御部
11 記録部
12 記憶部
13 入力部
14 出力部
15 取得部
11a 検出プログラム
Claims (11)
- 生体に関する測定により得られた複数の因子項目についての測定データに基づいて、測定対象である生体の症状の指標となるバイオマーカーの候補を検出する検出装置であって、
前記各因子項目のそれぞれの測定データの時系列変化の相関関係に基づいて複数の因子項目を複数のクラスターに分類する分類手段と、
分類した各クラスターから、前記各因子項目のそれぞれの測定データの時系列変化及び各因子項目間の測定データの時系列変化の相関関係に基づいて予め設定された選出条件に該当するクラスターを選出する選出手段と、
選出したクラスターに含まれる因子項目をバイオマーカーの候補として検出する検出手段と
を備えることを特徴とする検出装置。 - 請求項1に記載の検出装置であって、
前記選出手段は、
クラスター内の各因子項目間の測定データの相関を示す値の平均値を第1指数として算出する手段と、
クラスター内の因子項目の測定データと当該クラスター外の因子項目の測定データとの間の相関を示す値の平均値を第2指数として算出する手段と、
クラスター内の各因子項目について測定データの標準偏差の平均値を第3指数として算出する手段と
を含み、
複数のクラスターのうちから、第1指数、第2指数及び第3指数に基づいて、バイオマーカーとすべき因子項目を含むクラスターを選出する
ことを特徴とする検出装置。 - 請求項2に記載の検出装置であって、
前記選出手段は、前記第1指数と、前記第2指数と、前記第3指数の逆数との積に基づく総合指数が最大であるクラスターを選択する
ことを特徴とする検出装置。 - 請求項2又は請求項3に記載の検出装置であって、
前記各因子項目のそれぞれの測定データが、有意性をもって経時的に変化しているか否かを検定する差次検定手段を更に備え、
前記分類手段は、経時的変化に有意性があると検定された因子項目について分類する
ことを特徴とする検出装置。 - 請求項4に記載の検出装置であって、
前記差次検定手段は、各因子項目の測定データ、並びに因子項目及び時系列毎に予め設定されている参照データとの比較結果に基づいて、有意性に係る検定を行う
ことを特徴とする検出装置。 - 請求項5に記載の検出装置であって、
各因子項目について、対応する参照データの標準偏差の平均値を示す参照標準偏差、及び因子項目間の相関を示す値の平均値を示す参照相関値を算出する手段を更に備え、
前記検出手段は、前記第1指数が前記参照標準偏差に比べて有意性をもって増大し、前記第2指数が前記参照相関値に比べて有意性をもって減少し、かつ、前記第3指数が前記参照標準偏差に比べて有意性をもって増大した場合に、当該クラスターに含まれる項目をバイオマーカーの候補として検出する
ことを特徴とする検出装置。 - 請求項1乃至請求項6のいずれかに記載の検出装置であって、
前記検出手段は、
クラスターに含まれる複数の因子項目の有意性を、測定データの統計値に基づいて検定する手段を含み、
有意性がある場合に、クラスターに含まれる項目をバイオマーカーの候補として検出する
ことを特徴とする検出装置。 - 請求項1乃至請求項7のいずれかに記載の検出装置であって、
前記複数の因子項目のいずれかは、遺伝子に関する測定項目、タンパク質に関する測定項目、代謝物に関する測定項目、又は生体から得られる画像に関する測定項目である
ことを特徴とする検出装置。 - 生体に関する測定により得られた複数の因子項目についての測定データに基づいて、測定対象である生体の症状の指標となるバイオマーカーの候補を検出する検出装置を用いた検出方法であって、
前記検出装置は、
前記各因子項目のそれぞれの測定データの時系列変化の相関関係に基づいて複数の因子項目を複数のクラスターに分類する分類ステップと、
分類した各クラスターから、前記各因子項目のそれぞれの測定データの時系列変化及び各因子項目間の測定データの時系列変化の相関関係に基づいて予め設定された選出条件に該当するクラスターを選出する選出ステップと、
選出したクラスターに含まれる因子項目をバイオマーカーの候補として検出する検出ステップと
を実行することを特徴とする検出方法。 - 生体に関する測定により得られた複数の因子項目についての測定データに基づいて、測定対象である生体の症状の指標となるバイオマーカーの候補を検出する検出方法であって、
異なる時間点で採取した複数の生体サンプルのそれぞれから測定したハイスループットデータの中から、差次的生体分子を算出する分子スクリーニングステップと、
相関の高い生体分子同士を1つのクラスターとするように、前記分子スクリーニングステップで選出した前記差次的生体分子を複数のクラスターに分類するクラスター化ステップと、
前記クラスター化ステップで得られた複数のクラスターの中から、クラスター内の生体分子の間の相関の増大、クラスター内の生体分子の標準偏差の増大、及びクラスター内の生体分子と他の生体分子との間の相関の低減が最も著しいクラスターを、前記バイオマーカーの候補として先取する候補選択ステップと、
前記候補選択ステップで選出したバイオマーカーの候補が前記バイオマーカーであるか否かを、有意性検定によって判定する判定ステップと
を実行することを特徴とする検出方法。 - コンピュータに、生体に関する測定により得られた複数の因子項目についての測定データに基づいて、測定対象である生体の症状の指標となるバイオマーカーの候補を検出する処理を実行させる検出プログラムであって、
コンピュータに、
前記各因子項目のそれぞれの測定データの時系列変化の相関関係に基づいて複数の因子項目を複数のクラスターに分類する分類ステップと、
分類した各クラスターから、前記各因子項目のそれぞれの測定データの時系列変化及び各因子項目間の測定データの時系列変化の相関関係に基づいて予め設定された選出条件に該当するクラスターを選出する選出ステップと、
選出したクラスターに含まれる因子項目をバイオマーカーの候補として検出する検出ステップと
を実行させることを特徴とする検出プログラム。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/430,724 US11328792B2 (en) | 2012-09-26 | 2013-02-12 | Device for detecting a dynamical network biomarker, method for detecting same, and program for detecting same |
CA2885634A CA2885634C (en) | 2012-09-26 | 2013-02-12 | Device for detecting a dynamical network biomarker, method for detecting same, and program for detecting same |
KR1020157010816A KR102111820B1 (ko) | 2012-09-26 | 2013-02-12 | 동적 네트워크 바이오마커의 검출 장치, 검출 방법 및 검출 프로그램 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012211921A JP5963198B2 (ja) | 2012-09-26 | 2012-09-26 | 動的ネットワークバイオマーカーの検出装置、検出方法及び検出プログラム |
JP2012-211921 | 2012-09-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014050160A1 true WO2014050160A1 (ja) | 2014-04-03 |
Family
ID=50387586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/053188 WO2014050160A1 (ja) | 2012-09-26 | 2013-02-12 | 動的ネットワークバイオマーカーの検出装置、検出方法及び検出プログラム |
Country Status (5)
Country | Link |
---|---|
US (1) | US11328792B2 (ja) |
JP (1) | JP5963198B2 (ja) |
KR (1) | KR102111820B1 (ja) |
CA (1) | CA2885634C (ja) |
WO (1) | WO2014050160A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016129601A1 (ja) * | 2015-02-13 | 2016-08-18 | 国立研究開発法人産業技術総合研究所 | バイオマーカー探索方法、バイオマーカー探索装置、及びプログラム |
CN116304766A (zh) * | 2023-05-25 | 2023-06-23 | 山东艾迈科思电气有限公司 | 基于多传感器的开关柜状态快速评估方法 |
US11848075B2 (en) | 2017-05-12 | 2023-12-19 | Japan Science And Technology Agency | Biomarker detection method, disease assessment method, biomarker detection device, and computer readable medium |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11210124B2 (en) * | 2019-01-11 | 2021-12-28 | Hewlett Packard Enterprise Development Lp | Movement of virtual machine data across clusters of nodes |
KR102573416B1 (ko) * | 2021-07-16 | 2023-09-04 | 주식회사 휴이노 | 생체 신호 분석 모델의 출력 데이터를 관리하기 위한 방법, 시스템 및 비일시성의 컴퓨터 판독 가능한 기록 매체 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004524604A (ja) * | 2000-12-07 | 2004-08-12 | ユーロプロテオーム エージー | 遺伝的疾患の分類および予測のため、ならびに分子遺伝的パラメーターと臨床的パラメーターとの関連付けのためのエキスパートシステム |
JP2005527904A (ja) * | 2002-05-20 | 2005-09-15 | ロゼッタ インファーマティクス エルエルシー | 複雑性疾患を構成疾患に細分するコンピュータ・システムおよび方法 |
WO2008102825A1 (ja) * | 2007-02-20 | 2008-08-28 | Articell Systems Corporation | 遺伝子発現パターンから遺伝子を分類する方法 |
JP2009057337A (ja) * | 2007-08-31 | 2009-03-19 | Dainippon Sumitomo Pharma Co Ltd | メタボロームデータの解析方法および代謝関与マーカー |
JP2012094143A (ja) * | 2010-10-27 | 2012-05-17 | Samsung Sds Co Ltd | バイオマーカー抽出装置および方法 |
JP2012514783A (ja) * | 2009-01-06 | 2012-06-28 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 進化クラスタ化アルゴリズム |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU1853600A (en) | 1999-01-06 | 2000-07-24 | Choong-Chin Liew | Method for the detection of gene transcripts in blood and uses thereof |
US7473528B2 (en) | 1999-01-06 | 2009-01-06 | Genenews Inc. | Method for the detection of Chagas disease related gene transcripts in blood |
US20060134635A1 (en) | 2001-02-28 | 2006-06-22 | Chondrogene Limited | Method for the detection of coronary artery disease related gene transcripts in blood |
US20070031841A1 (en) | 2001-02-28 | 2007-02-08 | Choong-Chin Liew | Method for the detection of gene transcripts in blood and uses thereof |
US20050123938A1 (en) | 1999-01-06 | 2005-06-09 | Chondrogene Limited | Method for the detection of osteoarthritis related gene transcripts in blood |
JP2004536575A (ja) | 2001-02-28 | 2004-12-09 | コンドロジーン・インコーポレイテッド | 変形性関節症に関連する組成物および方法 |
CA2584505A1 (en) * | 2004-10-12 | 2006-04-27 | Lenard M. Lichtenberger | Purified phospholipid-non-steroidal anti-inflammatory drug associated compositions and methods for preparing and using same |
-
2012
- 2012-09-26 JP JP2012211921A patent/JP5963198B2/ja active Active
-
2013
- 2013-02-12 US US14/430,724 patent/US11328792B2/en active Active
- 2013-02-12 CA CA2885634A patent/CA2885634C/en active Active
- 2013-02-12 KR KR1020157010816A patent/KR102111820B1/ko active IP Right Grant
- 2013-02-12 WO PCT/JP2013/053188 patent/WO2014050160A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004524604A (ja) * | 2000-12-07 | 2004-08-12 | ユーロプロテオーム エージー | 遺伝的疾患の分類および予測のため、ならびに分子遺伝的パラメーターと臨床的パラメーターとの関連付けのためのエキスパートシステム |
JP2005527904A (ja) * | 2002-05-20 | 2005-09-15 | ロゼッタ インファーマティクス エルエルシー | 複雑性疾患を構成疾患に細分するコンピュータ・システムおよび方法 |
WO2008102825A1 (ja) * | 2007-02-20 | 2008-08-28 | Articell Systems Corporation | 遺伝子発現パターンから遺伝子を分類する方法 |
JP2009057337A (ja) * | 2007-08-31 | 2009-03-19 | Dainippon Sumitomo Pharma Co Ltd | メタボロームデータの解析方法および代謝関与マーカー |
JP2012514783A (ja) * | 2009-01-06 | 2012-06-28 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 進化クラスタ化アルゴリズム |
JP2012094143A (ja) * | 2010-10-27 | 2012-05-17 | Samsung Sds Co Ltd | バイオマーカー抽出装置および方法 |
Non-Patent Citations (1)
Title |
---|
CHEN, L.: "Detecting early-warning signals for sudden deterioration of complex diseases by dynamical network biomarkers", SCIENTIFIC REPORTS, vol. 2, no. 342, 29 March 2012 (2012-03-29), pages 1 - 8 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016129601A1 (ja) * | 2015-02-13 | 2016-08-18 | 国立研究開発法人産業技術総合研究所 | バイオマーカー探索方法、バイオマーカー探索装置、及びプログラム |
JP2016148604A (ja) * | 2015-02-13 | 2016-08-18 | 国立研究開発法人産業技術総合研究所 | バイオマーカー探索方法、バイオマーカー探索装置、及びプログラム |
US11238959B2 (en) | 2015-02-13 | 2022-02-01 | National Institute Of Advanced Industrial Science And Technology | Biomarker search method, biomarker search device, and program |
US11848075B2 (en) | 2017-05-12 | 2023-12-19 | Japan Science And Technology Agency | Biomarker detection method, disease assessment method, biomarker detection device, and computer readable medium |
CN116304766A (zh) * | 2023-05-25 | 2023-06-23 | 山东艾迈科思电气有限公司 | 基于多传感器的开关柜状态快速评估方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20150079641A (ko) | 2015-07-08 |
US20150278433A1 (en) | 2015-10-01 |
US11328792B2 (en) | 2022-05-10 |
CA2885634A1 (en) | 2014-04-03 |
CA2885634C (en) | 2021-01-26 |
JP2014064515A (ja) | 2014-04-17 |
KR102111820B1 (ko) | 2020-05-15 |
JP5963198B2 (ja) | 2016-08-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Arnatkeviciute et al. | Toward best practices for imaging transcriptomics of the human brain | |
JP5963198B2 (ja) | 動的ネットワークバイオマーカーの検出装置、検出方法及び検出プログラム | |
JP6164678B2 (ja) | ネットワークエントロピーに基づく生体の状態遷移の予兆の検出を支援する検出装置、検出方法及び検出プログラム | |
JP7124265B2 (ja) | バイオマーカー検出方法、疾病判断方法、バイオマーカー検出装置、及びバイオマーカー検出プログラム | |
Rahnenführer et al. | Statistical analysis of high-dimensional biomedical data: a gentle introduction to analytical goals, common approaches and challenges | |
JP2015043782A (ja) | 遺伝子及び老化判定方法 | |
Sotirakis et al. | Identification of motor progression in Parkinson’s disease using wearable sensors and machine learning | |
KR101067352B1 (ko) | 생물학적 네트워크 분석을 이용한 마이크로어레이 실험 자료의 작용기작, 실험/처리 조건 특이적 네트워크 생성 및 실험/처리 조건 관계성 해석을 위한 알고리즘을 포함한 시스템 및 방법과 상기 방법을 수행하기 위한 프로그램을 갖는 기록매체 | |
JP6198161B2 (ja) | 動的ネットワークバイオマーカーの検出装置、検出方法及び検出プログラム | |
JP6948722B2 (ja) | 検出装置及び検出プログラム | |
JP2023545704A (ja) | エクスポソーム臨床応用のためのシステム及び方法 | |
JP2024501620A (ja) | 生物学的障害の動的免疫組織化学プロファイリングのためのシステム及び方法 | |
Shen et al. | Cohort research in “Omics” and preventive medicine | |
JP2018005925A (ja) | バイオマーカーの候補及び治療用製薬 | |
EP1681981A2 (en) | Generation of biochemical images and methods of use | |
WO2017205733A1 (en) | Decision support system for cns drug development | |
JP2023172951A (ja) | 病理スライド画像の品質を評価する方法及び装置 | |
CN118202415A (zh) | 生化样品的全电子分析 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13842067 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2885634 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14430724 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20157010816 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13842067 Country of ref document: EP Kind code of ref document: A1 |