CN109585017A - Risk prediction algorithm model and device for age-related macular degeneration - Google Patents
Risk prediction algorithm model and device for age-related macular degeneration Download PDFInfo
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Abstract
The invention provides an Age-related macular degeneration (AMD) risk prediction algorithm model and device. Specifically, the invention provides 7 related Single Nucleotide Polymorphisms (SNPs) genotyping, wherein the genotyping is converted into OR (odd ratio) values, 7 pieces of clinical information are combined, and a risk prediction algorithm model and a risk prediction algorithm device are constructed by adopting a machine learning method. The invention can assist in advanced prediction and early diagnosis of AMD in clinic and has great clinical significance for reducing the incidence rate of AMD and improving the disease treatment rate.
Description
Technical field
The present invention relates to medical biotechnology detection fields, and in particular to a kind of age-related macular degeneration (Age-related
Macular degeneration, AMD) risk prediction algorithms model and device.
Background technique
Age-related macular degeneration (Age-related macular degeneration, AMD) is that the elderly is caused to lose
Bright principal element.The disease has the complicated cause of disease relevant to factors such as age, gender, smoking, race and heredity, is irreversible
Property visual deprivation, there is no effective treatment means for the disease at present.AMD disease incidence with higher, meta-analysis knot
Fruit shows that the total disease incidence of global AMD is 8.01%, the disease incidence in Europe, Africa and asian population AMD is respectively 11.2%,
7.1% and 6.8%.China's elderly population early stage AMD and advanced stage AMD disease incidence are respectively 4.7%-9.2% and 0.2%-
1.9%.Prediction is to 2020 and the year two thousand forty, global AMD patient will respectively reach 1.96 hundred million and 2.88 hundred million.As China human mortality is old
The quickening in age, AMD have apparent ascendant trend.
AMD occur as environmental factor and inherent cause comprehensive function as a result, wherein hair of the inherent cause in the disease
Occupy higher proportion in raw risk, reaches 45-70%.The AMD cause of disease is complicated, and pathogenesis and the h and E factor are related,
As described above, inherent cause occupies important proportion in the occurrence risk of the disease.Obviously, if comprehensive consideration h and E because
Element, and combine eyesight, intraocular pressure, funduscopy and underwent eye-ground vascular fluorescence visualization, optical tomography etc. conventional and the inspection of auxiliary AMD
It looks into, accurate diagnosis and effective risk assessment to AMD can be necessarily greatly improved in this, also would be beneficial for prevention and its morning of AMD
Phase discovery and treatment.
Therefore, there is an urgent need in the art to develop a kind of method for reliably carrying out early prediction and diagnosis to AMD.
Summary of the invention
It is an object of the invention to provide a kind of age-related macular degeneration (Age-related macular
Degeneration, AMD) risk prediction algorithms model and device.
In the first aspect of the present invention, a kind of biomarker set is provided, the set includes being selected from the group two
The biomarker of kind: rs2338104, rs754203, or combinations thereof.
In another preferred example, the biomarker collection is combined into the biology mark for diagnosing macular degeneration (AMD) disease
Will object set further includes biomarker selected from the group below: rs2284664, rs2071277, rs1999930, rs10490924,
Rs5749482, or combinations thereof.
In another preferred example, the biomarker collection is combined into the biology mark for diagnosing macular degeneration (AMD) disease
Will object set, the biomarker including being selected from Table A:
Table A
Number | Chromosome location | Mutating alkali yl |
rs2338104 | 12:109457363 | C>G |
rs754203 | 14:99691630 | A>G |
rs2284664 | 1:196733395 | C>T |
rs2071277 | 6:32203906 | T>C |
rs1999930 | 6:116065971 | C>T |
rs10490924 | 10:122454932 | G>T |
rs5749482 | 22:32663679 | C>G |
In another preferred example, the biomarker set is used to diagnose macular degeneration (AMD) disease, or is used to prepare
One kit or reagent, the kit or reagent are used to assess macular degeneration (AMD) disease risk of object to be measured
(neurological susceptibility) or diagnosis (including early diagnosis and/or auxiliary diagnosis) object macular degeneration (AMD) disease to be measured.
In another preferred example, the set includes the biomarker selected from table B:
Table B
In another preferred example, the set includes biomarker b1~b2.
In another preferred example, the set further includes biomarker b3~b7.
In another preferred example, the set further includes biomarker: rs551397, rs800292,
Rs10737680, rs3753396, rs1410996, rs2284664, rs1065489, or combinations thereof.
In another preferred example, the biomarker or biomarker set from blood, blood plasma, serum or
Mouth swab sample.
In another preferred example, each biomarker is detected by PCR.
In another preferred example, the amplification of DNA fragmentation and the extension of single base are carried out using quantitative fluorescent PCR.
In another preferred example, the detection of biological standard object is carried out using MassARRAT Analyzer 4system.
In another preferred example, the PCR includes QPCR, quantitative fluorescent PCR.
In another preferred example, the set is used for the assessment or diagnosis of AMD risk.
In another preferred example, the AMD risk of the assessment object to be measured includes the early screening of AMD.
In the second aspect of the present invention, a kind of reagent combination of assessment or diagnosis for AMD risk is provided, it is described
Reagent combination includes the reagent for detecting each biomarker in set as described in the first aspect of the invention.
In the third aspect of the present invention, a kind of kit is provided, the kit includes such as first aspect present invention institute
The set stated and/or reagent combination as described in respect of the second aspect of the invention.
In another preferred example, each biomarker is used as standard items in set as described in the first aspect of the invention.
In another preferred example, the kit further includes a specification.
In the fourth aspect of the present invention, a kind of purposes of biomarker set is provided, is used to prepare a kit, it is described
Kit be used for AMD risk assessment or diagnosis, wherein the biomarker set includes two kinds selected from the group below
Biomarker: rs2338104, rs754203, or combinations thereof.
In another preferred example, when assessment or diagnosis for AMD risk, the biomarker set further includes
Biomarker selected from the group below: rs2284664, rs2071277, rs1999930, rs10490924, rs5749482 or its
Combination.
In another preferred example, the assessment comprising steps of
(1) sample for deriving from object to be measured is provided, to SNP points of each biomarker in set described in sample
Offset (i.e. the A1 or A2 of table 2) is detected;
(2) site information that step (1) measures is compared with a reference data set;
Preferably, the reference data set includes from AMD patient and normal healthy controls person as in the set each
A biomarker;
In another preferred example, the sample is selected from the group: blood, blood plasma, serum and buccal swab.
In another preferred example, the site information that step (1) is measured is compared with a reference data set, also
Include the steps that establishing the multivariate statistical model of Supervised machine learning to export illness possibility, preferably, the machine
Device learning model is Xgboost analysis model.
In another preferred example, if the illness possibility > 0.5, the object is judged as with AMD disease
Sick risk suffers from AMD disease.
In another preferred example, before step (1), the method further includes the steps that handling sample.
In the fifth aspect of the invention, it provides a kind of for assessing or diagnosing the side of the AMD risk of object to be measured
Method, comprising steps of
(1) sample for deriving from object to be measured is provided, to the site of each biomarker in set described in sample
Information (such as SNP parting value (i.e. the A1 or A2 of table 2)) is detected;
(2) parting that step (1) measures is compared with a reference data set;
Preferably, the reference data set includes from AMD patient and normal healthy controls person as in the set each
The data of a biomarker;
In another preferred example, the sample is selected from the group: blood, blood plasma, serum and buccal swab.
In another preferred example, described step (1) is measured into parting to calculate corresponding data and a reference data set
It is compared, further including the steps that establishing has the machine learning model of supervision integrated study to export illness possibility, preferably
Ground, the machine learning model are Xgboost analysis model.
In another preferred example, if the illness possibility > 0.5, the object is judged as with AMD disease
Sick risk suffers from AMD disease.
In another preferred example, before step (1), the method further includes the steps that handling sample.
In the sixth aspect of the present invention, a kind of screen for assessing or diagnosing AMD risk candidate compound is provided
Method, comprising steps of
(1) in test group, test compound is applied to object to be measured, detects the sample for deriving from the object in test group
The horizontal V1 of each biomarker in gathering in product;In control group, blank control (including solvent) is applied to object to be measured,
Detect the horizontal V2 of each biomarker in set described in the sample of the object in control group;
(2) the horizontal V1 and horizontal V2 detected to previous step is compared, so that it is determined that the test compound
It whether is the candidate compound for treating AMD, wherein the set includes two or more biomarkers selected from the group below:
rs2338104、rs1999930、rs10490924。
In another preferred example, the object to be measured suffers from AMD.
In another preferred example, if the horizontal V1 of one or more biomarkers selected from subset H is substantially less than water
Flat V2 shows that testing compound is the candidate compound for treating AMD.
In another preferred example, described ratio≤0.8 for " substantially less than " referring to the horizontal V2 of horizontal V1/, preferably≤0.6,
More preferably ,≤0.4.
In the seventh aspect of the present invention, a kind of purposes of biomarker set is provided, for screening assessment or diagnosis AMD
The candidate compound of risk and/or for assessing candidate compound to the therapeutic effect of AMD, wherein the biological marker
Object set two kinds of biomarkers selected from the group below: rs2338104, rs754203, or combinations thereof.
In another preferred example, the biomarker further include: rs2284664, rs2071277, rs1999930,
Rs10490924, rs5749482, or combinations thereof.
In the eighth aspect of the present invention, a kind of AMD early stage auxiliary screening system is provided, which is characterized in that the system packet
It includes:
(a) AMD related disease feature input module, the AMD related disease feature input module is for inputting certain a pair
The AMD related disease feature of elephant;
Wherein the AMD related disease feature includes being selected from the group the site information of A (if SNP parting value is (i.e. table 2
A1 or A2)) two or more: rs2284664, rs2071277, rs1999930, rs10490924, rs2338104,
Rs754203, rs5749482, or combinations thereof;
(b) AMD related disease differentiates that processing module, the processing module press pre- the AMD related disease feature of input
Fixed judgment criteria carries out scoring processing, to obtain risk scoring;And by risk scoring and AMD related disease
Risk threshold value be compared, to obtain auxiliary screening results, wherein when the risk scoring be higher than the risk
When threshold value, then the risk for prompting the object to suffer from AMD related disease is higher than normal population;With
(c) screening results output module is assisted, the output module is used to export the auxiliary screening results.
It in another preferred example, further include following AMD related disease feature: age, the glycosuria state of an illness in the step (a)
Condition, body-mass index (BMI index), injury of kidney situation, atherosclerosis, situation of drinking, whether often situation outdoors.
In another preferred example, the object is people.
In another preferred example, the object includes infant, teenager or adult.
In another preferred example, following to carry out risk scoring processing in the processing module:
In another preferred example, the feature input module includes sample collection instrument.
In another preferred example, the feature input module is selected from the group: 4 system of MassARRAT Analyzer
Parting output module, Askme module.
In another preferred example, the differentiation processing module of the AMD related disease includes a processor and a storage
Device, wherein be stored in the reservoir AMD related disease based on AMD related disease feature risk threshold data or
Model.
In another preferred example, the output module includes reporting system (reporting system of such as Askme).
It should be understood that above-mentioned each technical characteristic of the invention and having in below (eg embodiment) within the scope of the present invention
It can be combined with each other between each technical characteristic of body description, to form a new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.
Detailed description of the invention
Fig. 1 shows technology path of the invention.
Fig. 2, which is shown, carries out gene SNP typing assay step using MassARRAT Analyzer 4system.
Fig. 3 shows that Logistic is returned, random forest, the repetition of Adaboost and Xgboost classifier 1000 times
Random to split training set and test set, test set average result does ROC curve, and characteristic variable includes clinical information and site information
(SNP+CC)。
Fig. 4 shows that Xgboost repeats 1000 study and prediction, the consensus forecast result of test set do ROC curve,
" CC ", which is characterized variable and only has clinical information data, " SNP " to be characterized variable, only has SNP site, and SNP+CC is characterized variable packet
Containing clinical information and site information.
Fig. 5 shows the importance scores of preceding 10 characteristic variables of Xgboost output.
Fig. 6 shows the relationship of variables number Yu ROC-AUC score.Process is that variable spy is obtained according to Xgboost model
Importance (Feature-importance) score of sign, according to score optimal screening model again, one by one according to importance
Score increases the number of characteristic variable from big to small and input model is trained and tests, and the ROC-AUC tested is optimal
Required variables number, the corresponding variables number of optimal ROC-AUC is 4 as shown in the figure, can be by before importance scores four
A characteristic variable treats as input variable, at this time ROC-AUC highest scoring.
Fig. 7 is shown using Xgboost as machine learning model, age, rs754203, rs2338104, diabetes conduct
1000 test set average value is done ROC curve by variable.
Specific embodiment
The present inventor after extensive and in-depth study, develops a kind of age-related macular degeneration (Age- for the first time
Related macular degeneration, AMD) risk prediction algorithms model and device.The present invention uses 7 correlations
Risk (Odd ratio) value of SNP constructs risk prediction algorithms model in conjunction with 7 clinical information, and using machine learning method
With device.The present invention can adjuvant clinical carry out AMD look-ahead, early diagnosis, to reduce AMD disease incidence, improve its disease
Treatment rate all has major clinical significance.The present invention is completed on this basis.
Term
Rs2338104: sequence
TGAAAAAGTTCTAAAATTAGATAGT [C/G] GTTATGGCCTCACAACTTGTGAATA, chromosome location 12:
109457363, participate in gene KCTD10
Rs754203: sequence
GTGCTGTCCTGGGGCCCAGGAGCCC [C/T] GGGGGCAAGGCTCTGCCCTGTTGCT, chromosome location 14:
99691630, it participates in gene C YP46A1 (GeneView)
Rs2284664: sequence
AGAAAAATACCAGTCTCCATAGATC [A/G/T] TAAAGCAAATAGATGGTCTTAAAAT, chromosome location
1:196733395 participates in gene C FH
Rs2071277: sequence
GGCAGTGACTGATGCAGTGTGTGAC [A/G] TCTAATCTCCCCCATAATTACAGGC, chromosome location 6:
32203906, participate in gene NOTCH4
Rs1999930: sequence
ATAGGACAGATTCTAGATTTTCCTT [A/C/G/T] TGATACAGAGAAATATAAGACATAA dyes position
6:116065971 is set, gene FRK is participated in
Rs10490924: sequence
TTTATCACACTCCATGATCCCAGCT [G/T] CTAAAATCCACACTGAGCTCTGCTT, chromosome location 10:
122454932, participate in Gene A RMS2
Rs5749482: sequence
TGGGAACTGACTAATACAGCATGTA [C/G] GAACTATGAAATATGAATTGTGTAA, chromosome location:
32663679, participate in gene LOC105373002, SYN3
Age-related macular degeneration (Age-related macular degeneration, AMD)
Aging for macula lutea plot structure sexually revises.It is mainly shown as retinal pigment epithelium to acromere disk film
Digestion power decline is swallowed, makes the disk film residual body retention not digested completely in basal part cell magma, and to cell
Outer discharge is deposited on Bruch film, and form glass-film wart then causes macular degeneration to be sent out thus after secondary various pathological changes
It is raw, or cause this fracture of Bruch film, choroidal capillaries are entered under RPE by the Bruch film ruptured and retina neural
It is upper subcutaneous, form choroidal neovascularization.Due to the textural anomaly of new vessels wall, lead to the leakage and bleeding of blood vessel, in turn
Cause a series of secondary pathological change.Senile macular degeneration mostly occurs in 45 years old or more, and illness rate increases with the age
It grows and increases, be the important diseases of current the elderly's blinding.
Single nucleotide polymorphism (Single nucleotide polymorphism, SNP)
It is primarily referred to as DNA sequence polymorphism caused by a single nucleotide variation at the genomic level.SNP is in people
It is widely present in genoid group, it is average everyJust there is 1 in a base-pair, estimates its sum up to 3,000,000 very
To more.SNP is a kind of label of two condition, as caused by the conversion or transversion of single base, can also by base insertion or lack
It becomes homeless cause.SNP both may be in gene order, it is also possible on the non-coding sequence other than gene.
Xgboost
A kind of boosting's has supervision integrated study model, is combined by multiple associated CART trees and is constituted.CART is
A kind of binary decision tree is each threshold value of each exhaustive characteristic series, being found according to GINI coefficient makes not when each branch
Pure property reduces maximum characteristic column and its threshold values, two be then divided into according to characteristic series≤threshold value and characteristic series > threshold value
Branch, each branch include the sample for meeting branch condition;Continue branch until all samples under the branch with same method
Unified classification is belonged to, or reaches preset termination condition, if the classification in final leaf node is not unique, with most samples
Classification of the classification as the leaf node.Xgboost is represented by following formula:
For predicted value, F indicates all possible CART tree, and f indicates a specific CART tree.
The objective function of model is following formula:
For loss function and ∑ Ω (fk) it is regular terms, the point that Obj (θ) is minimized is exactly this node
Predicted value, it is the smallestFunctional value is least disadvantage function.Xgboost uses addition coaching method, step by step optimization aim
Function optimizes one tree, re-optimization second tree, until having optimized k tree first.
ROC-AUC
A kind of method of evaluation model accuracy, ROC curve are Receiver operating curve (Receiver
Operating characteristic curve), with false positive probability (False positive rate) for horizontal axis, kidney-Yang
Property (True positive rate) be the longitudinal axis composed by coordinate diagram, be reflect sensibility and specificity continuous variable synthesis
Index.AUC is ROC curve area under (Area under the curve).ROC-AUC value more connects between 1.0 and 0.5
It is bordering on 1, illustrates that diagnosis effect is better, there is lower accuracy at 0.5~0.7, there is certain accuracy, AUC at 0.7~0.9
There is high accuracy at 0.9 or more.When AUC=0.5, illustrate that diagnostic method does not work completely, no diagnostic value.AUC<
0.5 does not meet truth, few in practice to occur.
Main advantages of the present invention include:
1) present invention predicts AMD value-at-risk for the first time in clinical field with site information and clinical data, is suitable for high throughput
The detection of sample;
2) the present invention prediction following age suffers from the risk of AMD, can prompt to change the effect to value-at-risk such as living habit, right
There is prevention warning in AMD disease.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part, such as Sambrook et al., molecular cloning: laboratory manual (New York:Cold Spring Harbor
Laboratory Press, 1989) condition described in, or according to the normal condition proposed by manufacturer.Unless otherwise stated, no
Then percentage and number are weight percent and parts by weight.
Embodiment 1.
The AMD disease of algorithm model and device needs is filtered out by statistical analysis from 108 alternative SNP site data
Relevant 7 site data.
It recruits Experiment Training group and control group carries out SNP statistics and clinical informatics analysis, by largely screening, find
108 SNP sites, SNP site are shown in Table 1.SNP typing data is obtained by following steps:
1. sample collection: using the two kinds of acquisition modes in lower section.
A) Blood specimen collection mode: whole blood acquires 2-4mL in EDTA anticoagulant tube.
B) buccal swab acquisition mode: nylon flocking buccal swab scrapes subject's oral cavity and oral cavity two sides are glutinous
Film will adopt excellent buccal swab sample and be put into and fill sample protection until buccal swab nylon flocking position is all wet
It is saved in the test tube of liquid (1-2mL).
2. sample transport: ice bag low-temperature transport being added in the foam box for being placed with sample.
3. 7500 quantitative fluorescent PCRs of application carry out the amplification of DNA fragmentation and the extension of single base.Dyestuff MIX is configured first:
1) when, configuring dyestuff, the several holes of polygamy is answered, -20 DEG C of preservations are put into after the completion of configuration;Secondly the mixed liquor of dye method and sonde method
It should be marked on centrifugation tube wall, two kinds of dyestuffs is avoided to obscure;It is sequentially added into reagent, i.e. MIXTURE (17 μ L), primer again
1 (1 μ L) sample (2 μ L);Last sealer, upper machine are completed.
4. application MassARRAT Analyzer 4system carries out gene SNP parting, operating procedure is as shown in Figure 2.
5. obtaining the relevant SNP site of AMD, association point by SNP association analysis (GWAS) technology within the scope of full-length genome
Analysis includes following hypothesis:
1) Genotypic Model (genotype model), it is assumed that A is time allele, and a is main allele, 3 kinds of differences
Genotype have different influences.
2) Dominant Model (dominant models), i.e. AA/Aa have different influences from aa genotype.
3) Recessive Model (recessive model), i.e. AA has different influences from Aa/aa
4) Allelic Model (waiting bit models), i.e. A and a have different influences
Based on above-mentioned it is assumed that calculating chi-square value.O is observing frequency, and E is expected frequence.Such as
(2) it is assumed that the first step we calculate AA or Aa (the two the meets one) observing frequency of genotype in normal person and
The difference of expected frequence, the value V1 obtained divided by expected frequence, second step calculate AA or Aa according to the calculation method of normal person
Value V2 in disease, third step obtain value V3 of the aa in normal person and according to the method described above respectively in diseases
Value V4, calculating chi-square value is then V1+V2+V3+V4.The p value of its correlation is obtained by chi-square value, according to p value less than 0.05
Screening obtains 14 related locus.
There is the chromosome there are synteny inside this 14 related locus, 7 big sites of synteny excluded by algorithm,
Specific algorithm is as follows: do 50 SNP sites draw window (window), this stroke of window every time move 5 SNP, calculate wherein 1 and its
The multiple correlation index R in his each site2, calculate 1/ (1-R2) VIF index, if the index be greater than 2, exclude these SNP
Point.Exclude rs551397, rs800292, rs10737680, rs3753396, rs1410996, rs2284664, rs1065489
Site finally obtains rs2284664, rs2071277, rs1999930, rs10490924, rs2338104, rs754203,
The site rs5749482.
After above-mentioned process, required site is obtained, information is shown in Table 2.
6.SNP loci gene type cleaning data become corresponding numerical value, the AMD7 relevant bits which goes out
The OR value (Odd ratio) of point.OR value (Odd ratio) refers to the probability that things occurs and the ratio between the probability not occurred.Formula
It is as follows:
OR=(nA/na)/(mA/ma)=(nA × ma)/(mA × na)
Assuming that A is time allele, nA is the gene number of A in disease, and it is not the gene number of A, mA that na, which is in disease,
For the gene number of A in control, it is not the gene number of A that ma, which is in control,.It has following effect:
A) when OR > 1, illustrate that the frequency of the A of case group is greater than non-case group, i.e. A has higher onset risk.
B) when OR < 1, illustrate the frequency of the A of case group lower than non-case group, i.e., A has protective effect.
C) disease and A equipotential contact more closely, and the numerical value of odds ratio is bigger.
The SNP site number that table 1. is initially selected
(Unified number of the dbSNP of US National Biotechnology Information center (NCBI) database)
SNP association analysis (GWAS) technology obtains the relevant SNP site information of AMD in 2. genome range of table
CHR | SNP | A1 | F_A | F_U | A2 | CHISQ | P | OR | SE | L95 | U95 |
1 | rs2284664 | T | 0.2687 | 0.3762 | C | 4.25 | 0.03924 | 0.6091 | 0.2414 | 0.3795 | 0.9777 |
6 | rs2071277 | C | 0.3672 | 0.4471 | T | 7.591 | 0.022470 | 0.7175 | 0.2304 | 0.4568 | 1.127 |
6 | rs1999930 | T | 0.03676 | 0.004587 | C | 5.204 | 0.02253 | 8.282 | 1.101 | 0.9571 | 71.67 |
10 | rs10490924 | T | 0.5397 | 0.4231 | G | 4.286 | 0.03842 | 1.599 | 0.2273 | 1.024 | 2.496 |
12 | rs2338104 | G | 0.4206 | 0.2905 | C | 5.951 | 0.01471 | 1.773 | 0.2359 | 1.117 | 2.816 |
14 | rs754203 | G | 0.2868 | 0.3773 | A | 7.925 | 0.019020 | 0.6636 | 0.2352 | 0.4186 | 1.052 |
22 | rs5749482 | G | 0.2353 | 0.3636 | C | 6.42 | 0.01128 | 0.5385 | 0.246 | 0.3325 | 0.872 |
First row CHR is the chromosome information in site, and second is classified as the number of SNP site, and it is time equipotential that third, which arranges (A1),
Genotype, the 4th column F_A are the frequency observed of A1 genotype disease, and the 5th to be classified as F_U be A1 allele in Healthy People
The frequency observed, the 6th is classified as the i.e. main allele (A2) of another allelotype, and the 7th column CHISQ is chi-square value, the
Eight column P are the P value that chi-square value converts, and the 9th column OR is then OR value-at-risk, and being left ten, 11, ten second is the mark of OR value
Quasi- mistake and the thereon upper value of 95% confidence interval and lower value.
Subsequent gene type will be replaced by the OR value of secondary allele, it is assumed for example that A is time allele, based on a etc.
Position gene replaces with OR value comprising one allele (Aa), and will replace with OR comprising two allele (AA) is worth
Square, 1. are replaced with if without the secondary allele (aa)
Embodiment 2.
Age of acquisition, height and weight index (BMI), hypertension situation, hyperlipidemia are arranged in questionnaire situation according to subject
Situation, diabetic condition, injury of kidney situation, whether often outdoors, whether vegetarian diet, be not always drawn through cigarette, always do not drink
Cross 13 clinical investigation data such as wine, atherosclerosis situation, ocular surgical situation, gender situation.
Embodiment 3.
Machine learning algorithm can be divided into three classes: supervised learning, unsupervised learning and semi-supervised learning.Supervised learning is to pass through
Input is mapped to suitable output, for example divided by the corresponding relation between a part of input data and output data, generating function
Class.Sample data of the invention is all in clinical definite, with the label classified, therefore will be in the machine learning for having supervision
Exploration selection is carried out in disaggregated model.All samples are only had to the data (SNP) of SNP site information respectively, all samples only have
The data (CC) of clinical information, and the integrated data (SNP+CC) of SNP site and clinical information is combined to be used as input data, sample
This diagnostic result is as output category label.
Algorithm building is carried out according to following steps:
A) all data are randomly divided into 75% training set and 25% test set.
B) Machine learning classifiers are constructed.It uses SNP+CC as input data, successively attempts Logistic and return, it is random gloomy
Woods, Adaboost and Xgboost.
C) cross validation tune is joined, and chooses the best parameter of score.
D) result verification is carried out with test set.
E) model evaluation.Above-mentioned steps repeat 1000 times, calculate aspect under the curve of average subject's curve of test set
Product (ROC-AUC).The Xgboost for choosing highest ROC-AUC score is best model (see Fig. 3).
F) characteristic variable is screened.Respectively by clinical information (CC), site information (SNP) is believed in conjunction with clinical information and site
It ceases (SNP+CC) and is used as input data, classified by Xgboost, repeated 1000 times, test ensemble average subject curve is shown in
Fig. 4, it can be seen that the ROC-AUC highest of SNP+CC.
G) Feature Selection is advanced optimized.Xgboost model obtains the importance (Feature- of characteristics of variables
Importance) score (such as preceding 10 importance is shown in Fig. 5) will change score according to score optimal screening model again
From big to small, increase variables number one by one and remove trained and test model, to obtain the relationship of variables number Yu ROC-AUC score
Scheme (see Fig. 6).The results show that the data of 4 most important variables (age, rs754203, rs2338104, diabetes) of input
Training and test model, the ROC-AUC score highest that model measurement obtains.
H) using Xgboost as machine learning model, at the age, rs754203, rs2338104, diabetes are as input change
Amount, the average ROC-AUC for obtaining 1000 times is (0.800 ± 0.06).
I) storage model, the AMD risk profile for subsequent measurement data.
J) value-at-risk exports: i.e. the test data of the complete algorithm model prediction input of learning training (is suffered from 0 (control) and 1
AMD disease) between probability, 1 (suffering from the disease) probability value is finally confirmed as value-at-risk, is by the judgement that value-at-risk is more than 0.5
Suffer from AMD disease.
All references mentioned in the present invention is incorporated herein by reference, independent just as each document
It is incorporated as with reference to such.In addition, it should also be understood that, after reading the above teachings of the present invention, those skilled in the art can
To make various changes or modifications to the present invention, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
Sequence table
<110>Hypon rattan biological medicine Science and Technology Co., Ltd. on
Co., Ltd, upper Hypon rattan medical test institute
<120>the risk prediction algorithms model and device of a kind of age-related macular degeneration
<130> P2018-2112
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Claims (9)
1. a kind of biomarker set, which is characterized in that the set includes the biomarker for being selected from the group two kinds:
Rs2338104, rs754203, or combinations thereof.
2. biomarker set as described in claim 1, which is characterized in that the set further includes biology selected from the group below
Marker: rs2284664, rs2071277, rs1999930, rs10490924, rs5749482, or combinations thereof.
3. biomarker set as described in claim 1, which is characterized in that the set further includes biomarker:
Rs551397, rs800292, rs10737680, rs3753396, rs1410996, rs2284664, rs1065489 or its group
It closes.
4. a kind of reagent of assessment or diagnosis for age-related macular degeneration risk combines, which is characterized in that institute
Stating reagent combination includes the reagent for detecting each biomarker in set as described in claim 1.
5. a kind of kit, which is characterized in that the kit includes set as described in claim 1 and/or such as right
It is required that reagent described in 4 combines.
6. a kind of purposes of biomarker set, which is characterized in that be used to prepare a kit, the kit is used for year
The assessment or diagnosis of age macular degeneration related risk, wherein the biomarker set includes selected from the group below two
Kind biomarker: rs2338104, rs754203, or combinations thereof.
7. a kind of screening is used to assess or the method for diagnosis of age-related macular degeneration risk candidate compound, feature
It is, comprising steps of
(1) in test group, test compound is applied to object to be measured, is detected in test group in the sample of the object
The horizontal V1 of each biomarker in set;In control group, blank control is applied to object to be measured, detects control group
The horizontal V2 of each biomarker in set described in sample derived from the object;
(2) the horizontal V1 and horizontal V2 detected to previous step is compared, so that it is determined that the test compound whether
It is the candidate compound for treating age-related macular degeneration, wherein the set includes two or more biologies selected from the group below
Marker: rs2338104, rs1999930, rs10490924.
8. a kind of purposes of biomarker set, which is characterized in that become for screening assessment or diagnosis of age-related macula lutea
The candidate compound of property risk and/or for assessing candidate compound to the therapeutic effect of age-related macular degeneration,
Wherein, the biomarker set two kinds of biomarkers selected from the group below: rs2338104, rs754203, or combinations thereof.
9. a kind of age-related macular degeneration early stage auxiliary screening system, which is characterized in that the system comprises:
(a) age-related macular degeneration related disease feature input module, the age-related macular degeneration related disease
Feature input module is used to input the age-related macular degeneration related disease feature of certain an object;
Wherein the age-related macular degeneration related disease feature includes two kinds or more of site information for being selected from the group A
Kind: rs2284664, rs2071277, rs1999930, rs10490924, rs2338104, rs754203, rs5749482 or its
Combination;
(b) age-related macular degeneration related disease differentiates that processing module, the processing module are related for the age of input
Property macular degeneration related disease feature, carry out scoring processing by scheduled judgment criteria, thus obtain risk scoring;And it will
The score risk threshold value of age-related property macular degeneration related disease of the risk is compared, to obtain auxiliary sieve
Come to an end fruit, wherein when risk scoring is higher than the risk threshold value, then the object is prompted to suffer from age-related macular
The risk of degeneration-related disorder is higher than normal population;With
(c) screening results output module is assisted, the output module is used to export the auxiliary screening results.
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