WO2012162884A1 - 检测胚胎或肿瘤染色体拷贝数的试剂盒、装置和方法 - Google Patents
检测胚胎或肿瘤染色体拷贝数的试剂盒、装置和方法 Download PDFInfo
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6869—Methods for sequencing
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- G—PHYSICS
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- G16B25/00—ICT specially adapted for hybridisation; ICT specially adapted for gene or protein expression
Definitions
- Kit, Apparatus and Method for Detecting Embryo or Tumor Chromosome Copy Numbers Field of the Invention The present invention relates to kits, devices and methods for detecting embryo or tumor chromosome copy number.
- Abnormal chromosome copy number is closely related to human diseases. There are chromosomal abnormalities in the embryonic parcels carrying hereditary diseases and in the tumor fines. On average, 9 out of every 1,000 newborns carry diseases caused by abnormal chromosome copy numbers (1). It is therefore important to be able to detect the number of chromosome copies before the fetus is born.
- the present invention is based on the fact that the inventors have found that the GC content of DNA fragments from individual chromosomes measured by the method of the present invention has a linear relationship with the ratio of DNA fragments from individual chromosomes to total DNA fragments, respectively.
- a and b are constants, which may be different values for different chromosomes a and b, which may be corrected according to the GC content in the DNA fragment from the chromosome to be tested, and the calculation of the sample from the sample to be tested
- the ratio of the corrected ratio of the DNA fragment of the chromosome to be tested, the degree of the variation determines the copy number of the chromosome to be tested.
- the embryonic DNA in the maternal plasma is mostly from 100 bp to 250 bp, and the 150 bp to 170 bp DNA is particularly dominant, although the mother's DNA also has a small distribution.
- DNA with a fragment greater than 250 bp is essentially the DNA of the mother.
- the present inventors have found that, although the reason is unknown, the DNA fragment from each chromosome accounts for a ratio of total DNA fragments at any point or any interval between 100 bp and 250 bp, that is, the DNA is uniformly distributed from 100 bp to 250 bp.
- the mutation determines the copy number of the chromosome to be tested based on the degree of the mutation.
- the inventors found that in the process of tumorigenesis, similarly, a phenomenon similar to that in the maternal blood during embryonic development occurs in the blood of the patient, that is, DNA of the free tumor cell can be detected in the blood of the tumor patient. .
- the GC content of the DNA fragments from each chromosome measured by the method of the present invention has a linear relationship with the ratio of the DNA fragments from the respective chromosomes to the total DNA fragments, respectively, and should be applied to the chromosomal polyploid of the DNA of the tumor cells. Detection.
- the DNA of free tumor cells in plasma exists in the form of nucleosomes, so most of them are fragments of lOObp to 250bp, and the ratio of DNA fragments from individual chromosomes to total DNA fragments is between lOObp and 250bp.
- kits, devices and methods of the invention are equally applicable to detecting the copy number of a tumor cell chromosome or a local chromosome. Based on the above findings, the inventors have invented kits, devices and methods that are relatively non-invasive and economical and more accurate in detecting embryo or tumor chromosome or local chromosome copy number.
- the invention provides a kit for detecting the chromosome copy number of an embryo or a tumor, comprising: a device for taking blood from a mother or a tumor patient; a device suitable for separating blood cells and plasma in the blood; extracting the plasma Reagents and devices for DNA; reagents and devices for physically separating the fragments according to the size of the DNA; and reagents and devices for sequencing all DNA at any point or any interval between 100 bp and 250 bp.
- the embryo or tumor chromosome is an entire chromosome or a local chromosome.
- the kit of the present invention further comprises: reagents and devices for making the DNA into a library for sequencing.
- the kit of the present invention further comprises: reagents and devices for PCR amplification of the DNA extracted from plasma or the library for sequencing.
- the DNA of any one or any of the intervals between 100 and 250 bp is 150 bp to 170 bp of DNA, more preferably 167 bp of DNA.
- Another kit for detecting embryonic or tumor chromosome copy number provided by the present invention, comprising: a device for taking blood from a mother or a tumor patient; an apparatus suitable for separating blood cells and plasma in the blood; extracting the plasma Reagents and devices for DNA; reagents and devices for making the DNA into a library for sequencing; and reagents and devices for sequencing the DNA.
- the embryo or tumor chromosome is an entire chromosome or a local chromosome.
- the kit of the present invention further comprises reagents and devices for PCR amplification of the DNA extracted from plasma.
- the invention provides a device for detecting the chromosome copy number of an embryo or a tumor, comprising: a detecting module, configured to sequence DNA in a plasma sample of a maternal plasma or a tumor patient, the sequencing comprising plasma samples of a maternal plasma or a tumor patient a process of making all of the DNA into a library for sequencing; a comparison module for aligning the sequencing result of the DNA with a genomic sequence map to determine that each DNA in the DNA is from a chromosome and a sequence length of each piece of DNA; a calculation module for calculating a ratio of the number of DNA fragments from the chromosome to be tested in the same sample to the total number of DNA fragments, according to the GC in the DNA fragment from the chromosome to be tested Correcting the ratio; and calculating a
- Correction of the ratio of chromosomes 6, 7, 8, 12, 13, and X GC of DNA fragments from chromosomes 2, 3, 4, 5, 6, 7, 8, 12, 18, and X
- the GC content of the DNA fragments from chromosomes 2, 3, 4, 5, 6, 7, 8, 12, 13, 18 and X is proportional to the ratio of the DNA fragments from the respective chromosomes to the total DNA fragments.
- the linear relationship between them is as shown in Table 1.
- the calculation module in the apparatus of the present invention is based on the following functions for the first, 9, 10, 11,
- the GC content has a linear relationship with the ratio of the DNA fragments from each chromosome to the total DNA fragments.
- the sequencing comprises the process of making all of the DNA in the maternal plasma or tumor patient plasma sample into a library for sequencing.
- the sequencing of the DNA in the plasma sample of the maternal plasma or tumor patient is double-ended short sequence sequencing, single-ended long sequence sequencing or single-ended short sequence sequencing.
- the embryo or tumor chromosome is an entire chromosome or a local chromosome.
- the calculation module is configured to calculate the number of DNA fragments from the chromosome to be tested in any DNA between any point or any interval between 100 bp and 250 bp in the same sample, arbitrarily between 100 bp and 250 bp.
- the ratio of the total number of all DNA fragments in one or any of the intervals is corrected according to the GC content of the DNA fragment from the chromosome to be tested in all DNAs at any point between 100 bp and 250 bp; A variation of the corrected ratio of the DNA fragment from the chromosome to be tested in the sample to be tested is calculated, and the copy number of the chromosome to be tested is determined according to the degree of the mutation. .
- all DNA of any point or any interval between 100 bp and 250 bp in the maternal plasma or tumor patient plasma sample is made into a library for sequencing.
- the DNA in the maternal plasma or tumor patient plasma sample is PCR amplified before or after the library is made ready for sequencing.
- the DNA of any one or any of the intervals between 100 and 250 bp is 150 bp to 170 bp of DNA, more preferably 167 bp of DNA.
- the invention provides a method for detecting the chromosome copy number of an embryo or a tumor, comprising the steps of: taking maternal plasma or tumor patient plasma; separating plasma and blood cells in the blood; making the DNA in the plasma available Sequencing the library; sequencing the DNA sequencing library; comparing the result of the sequencing with a genomic sequence map, determining that each of the DNA sequences is from a number of chromosomes and the length of each of said DNA sequences; and using the sequencing and alignment results of said DNA, calculating the ratio of the number of DNA fragments from the chromosome to be tested in the same sample to the total number of DNA fragments, The GC content in the DNA fragment from the chromosome to be tested is corrected for the ratio, and the corrected ratio of the DNA fragment from the chromosome to be tested in the sample to be tested is calculated, and the test
- the copy number of the chromosome Preferably, the method of the present invention corrects the ratio of chromosomes 2, 3, 4, 5, 6, 7, 8, 12, 18, and X according to the following function: from the 2nd, 3rd, 4th
- y represents the GC content of the DNA fragment from the chromosome to be tested
- x represents the ratio of the number of DNA fragments from the chromosome to be tested to the total DNA
- a and b are constants
- a is a negative number.
- the GC content of the DNA fragments from chromosomes 2 3, 4, 5, 6, 7, 8, 12, 13, 18 and X is proportional to the ratio of the DNA fragments from the respective chromosomes to the total DNA fragments The linear relationship between them is as shown in Table 1.
- the method of the present invention corrects the ratio of chromosomes 1, 9, 10, 11, 15, 16, 17, 19, 20, 21, and 22 according to the following function:
- the GC content of the DNA fragments of chromosomes 10, 11, 15, 16, 17, 19, 20, 21, and 22 has a linear relationship with the ratio of the DNA fragments from each chromosome to the total DNA fragment, respectively, and the linear relationship is available.
- & + 1? Indicates, where y represents the GC content of the DNA fragment from the chromosome to be tested, x represents the ratio of the number of DNA fragments from the chromosome to be tested to the total DNA, a and b are constants, and a is a positive number.
- the GC content of the DNA fragments from chromosomes 1, 9, 10, 11, 15, 16, 17, 19, 20, 21 and 22 is proportional to the ratio of the DNA fragments from the respective chromosomes to the total DNA fragments
- the linear relationship between them is as shown in Table 2.
- only the sequencing and alignment results of all DNAs of any point or any interval between 100 bp and 250 bp of the sequence length of the DNA are calculated, and any point or any interval between 100 bp and 250 bp in the same sample is calculated.
- sequencing of the DNA sequencing library is double-ended short sequence sequencing, single-ended long sequence sequencing or single-ended short sequence sequencing.
- the DNA of any point or any interval between 100-250 bp is 150 bp to 170 bp of DNA, more preferably 167 bp of DNA.
- FIG. 1 is an image obtained by electrophoresing a DNA of maternal plasma into a library for double-end sequencing and electrophoresed on a 1% agarose gel. The channel on the left is an image of the DNA lOObp standard, and the channel on the right is an image of the library DNA for double-end sequencing. The most obvious band is located at about 280 bp, which contains a 120 bp ligation primer.
- Fig. 2 is a distribution diagram of the DNA fragment size of the sample G356. Fig.
- FIG 3 is a distribution diagram of the DNA fragment from the X chromosome determined in accordance with the fragment size in the sample G356 after the alignment.
- Figure 4 is a calculated and actual measured distribution of the DNA fragment of the X chromosome of G356 according to the size of the fragment.
- the line with an asterisk indicates the total number of DNA sequences of the G356 sample multiplied by the percentage of the X chromosome.
- the resulting graph, the circle ⁇ represents the number of sequences of the actually detected X chromosome.
- the calculated distribution of the DNA fragment of the G356X chromosome is substantially the same as that of the actual measurement, and the two lines are basically identical.
- Figures 5A-H are based on sample numbers: G356, G397 (repeated 8 times), G426, G735, G756, G760, G763, G770, G778, G779, G780, G781, G824, and G825 from the chromosome to be tested.
- the GC content of the DNA fragment and the ratio of the number of DNA fragments from the chromosome to be tested to the total DNA fragment, the resulting standard curve, samples G356, G397, G426, G735, G756, G760, G763, G770, G778, G779, G780, G781, G824 and G825 were identified as normal female embryo samples by amniocentesis by the Amniocentesis of Central South University [46, XX].
- the X axis represents the ratio of the number of DNA fragments from the chromosome to be tested to the total DNA fragment
- the Y axis represents the GC content of the DNA fragment from the chromosome to be tested.
- FIG. 5 AF shows a standard curve for three chromosomes, showing the standard curve of chromosomes 1-18 in turn, and Figure 5G shows the standard curve of chromosomes 19-22, Figure 5H shows A standard curve of the X chromosome is shown.
- the function of the standard curve for each chromosome is shown in Tables 1 and 2.
- Figure 6 is a schematic illustration of a sample of chromosome 13 trisomy detected by the method of the present invention. Wherein, the X axis represents the ratio of the number of DNA fragments from chromosome 13 to the total DNA fragment, and the Y axis represents the GC content of the DNA fragment from chromosome 13.
- FIG. 7 is a schematic illustration of a sample of chromosome 18 trisomy detected by the method of the present invention.
- the X axis represents the ratio of the number of DNA fragments from chromosome 18 to the total DNA fragment
- the Y axis represents the GC content of the DNA fragment from chromosome 18.
- the ratio of the number of DNA fragments from chromosome 18 to the total DNA fragment in each sample is shown by a diamond on the X-axis, and the rectangle indicated by an arrow indicates that the GC content of the DNA fragment from chromosome 18 is corrected. , a sample of the trisomy of chromosome 18 detected.
- Figure 8 is a schematic representation of an X chromosome monomer or a trisomy sample detected by the method of the present invention.
- the X axis represents the ratio of the number of DNA fragments from the X chromosome to the total DNA fragment
- the Y axis represents the GC content of the DNA fragment from the X chromosome.
- the ratio of the number of DNA fragments from the X chromosome to the total DNA fragment in each sample is shown by a diamond on the X-axis, and the rectangle on the left side of the standard curve indicated by an arrow indicates the GC content of the DNA fragment from the X chromosome.
- FIGS. 9A-B are schematic illustrations of samples of chromosome 21 trisomy detected by the method of the present invention.
- the X axis represents the ratio of the number of DNA fragments from chromosome 21 to the total DNA fragment
- the Y axis represents the GC content of the DNA fragment from chromosome 21.
- the ratio of the number of DNA fragments from chromosome 21 to the total DNA fragment in each sample is shown by a diamond on the X-axis, and the rectangle indicated by an arrow indicates that the GC content of the DNA fragment from chromosome 21 is corrected. , a sample of the trisomy of chromosome 21 detected. If the GC content of the DNA fragment of the chromosome to be tested of the present invention is not corrected, only the DNA fragment from chromosome 21 is used.
- a double-ended short sequence refers to a sequence of less than 50 bp immediately following the 5, end-linked primer and a sequence of less than 50 bp immediately following the 3, end-linked primer.
- the double-ended short sequence refers to a sequence of no more than 36 bp next to the 5, end-linked primer and a sequence of no more than 36 bp immediately following the 3'-end linked primer.
- a single-ended short sequence refers to a sequence of less than 50 bp immediately following the 5, end-linked primer or a sequence of less than 50 bp immediately following the 3, end-linked primer.
- a single-ended short sequence refers to a sequence of no more than 36 bp immediately following the 5, end-linked primer or a sequence of no more than 36 bp immediately following the 3'-end linked primer.
- a single-ended long sequence refers to a sequence of greater than 99 bp immediately following the 5, end-linked primer or a sequence of greater than 99 bp immediately following the 3, end-linked primer.
- Double-end sequencing refers to testing sequences located at both ends of a sequence, respectively.
- Single-ended sequencing refers to testing a sequence at one end of a sequence.
- a DNA cluster refers to a plurality of DNA molecules located in a certain solid area amplified by a single DNA molecule. In the examples of the application, a DNA cluster refers to about 1000 DNA molecules located within 1 square inch of a single DNA molecule.
- Emulsified PCR refers to the PCR reaction of a PCR (Polymerase Chain Reaction) reaction, including PCR template DNA, PCR primers, PCR polymerase, and free bases in an oil bead. Typically, in a single oil bead, the template for the emulsified PCR has only one DNA molecule.
- GC content refers to the ratio of the number of guanines and cytosines to the total number of all bases in nucleic acids or deoxyribonucleic acids.
- Example 1 A method for detecting the chromosome copy number of an embryo Step 1: Take maternal blood and prepare plasma. In this example, a total of 14 maternal blood samples were taken. The samples were coded as: G356, G397, G426, G735, G756, G760, G763, G770, G778, G779, G780, G781, G824, and G825, both Prof. Yan Lingwei from the Xiangya School of Medicine of Central South University identified the female embryo samples [46, XX] by karyotype through amniocentesis. The data of the above samples were used for the standard curve, and the above samples were also used as standard samples.
- Step 2 Extract plasma DNA.
- DNA in plasma can be extracted using a DNA extraction kit manufactured by Qiagen (product number 57704).
- the extracted DNA ends were blunted and subjected to 5, terminal phosphorylation: DNA 30 ⁇ l, pure water 45 ⁇ l, T4 DNA ligase buffer with 10 mM ATP 10 ⁇ l, 10 mM dNTP Mix 4 ⁇ 1, T4 DNA polymerase 5 ⁇ 1 Klenow enzyme 1 ⁇ 1, ⁇ 4 ⁇ 5 ⁇ , and then incubated at 20 °C for 30 minutes (reagent is provided by Illumina sample preparation kit PE-102-1001)ticianQIAGEN QIAquick PCR purification kit after warm bath ( part # 28104 Purification of DNA.
- End-suspension A The product of the previous step was dissolved in 32 ⁇ M buffer, added to Klenow buffer 5 ⁇ l, ImM dATP 10 ⁇ l, Klenow ⁇ - 3 ⁇ , and kept at 37 ° C for 30 minutes (reagent) For Illumina Sample Preparation Kit PE-102-1001), the product is ligated by QIAGEN MinElute PCR Purification Kit ( part # 28004 ): DNA is dissolved in ⁇ buffer, DNA ligase buffer is added 2 ⁇ 25 ⁇ 1, PE Adapter Oligo Mix ⁇ , DNA ligase 5 ⁇ 1, kept at 20 ° C for 15 minutes (reagent is provided by Illumina sample preparation kit PE-102-1001)paper After warm bath, the DNA was purified using QIAGEN QIAquick PCR Purification Kit ( part # 28104 ).
- Figure 1 shows the DNA of the sample being made into a double-end sequenced library.
- the DNA in the library was electrophoresed on a 1% agarose gel.
- Figure 1 is an image of gel electrophoresis. The most obvious band is 280 bp. Left and right, because the 120 bp ligation primer is included, the main plasma DNA fragment of the mother is concentrated at about 160 bp.
- the library for double-end sequencing can also be subjected to PCR amplification: 1 ⁇ 1 ⁇ , 22 ⁇ pure water, ⁇ PE PCR primer PE 2.0, 1 ⁇ PE PCR primer PE 1.0, 2x Phusion DNA Polymerase (Finnzymes Oy) (reagent provided by Illumina Sample Preparation Kit PE-102-1001).
- Step 4 Sequencing the DNA sequencing library.
- double-end short sequence sequencing, single-end long sequence sequencing or single-ended short sequence sequencing can be performed separately.
- the following is the process of performing double-ended short sequence sequencing.
- a single DNA molecule in a DNA double-end sequencing library is made into a DNA cluster using Illumina's cBot instrument. This step can also be used to transform a single DNA molecule into a multi-molecule on a bead by emulsion PCR. ⁇ !
- the DNA beads obtained by the DNA amplification or emulsification PCR generated above were subjected to double-end sequencing in Illumina's Genome Analyzer or HiSeq2000 sequencer. This process is done automatically by the instrument itself.
- the DNA cluster generated above or the DNA beads obtained by emulsification PCR can also be subjected to single-end long sequence sequencing in Illumina's Genome Analyzer, HiSeq2000 or Life Technologies' SOLiD sequencer.
- the sequencing steps and reaction conditions on Illumina's Genome Analyzer, HiSeq2000 and Life Technologies' SOLiD sequencers are the same as described above.
- Step 5 Determine that the DNA fragment in the plasma is from the chromosome and determine if the copy number of the chromosome to be tested is normal.
- double-end short sequence sequencing of the DNA library alternatively, it is also possible to measure single-end long sequence or single-ended short sequence sequencing
- the database is also called hg l9 alignment, and the positions of the sequences at the two ends are determined on the chromosome.
- Fig. 2 is a distribution diagram of the DNA fragment size of the sample G356 determined according to the above method. As can be seen from the figure, the short DNA of the maternal plasma is mainly concentrated between 100 bp and 220 bp.
- Fig. 3 is a distribution diagram of the DNA fragment from the X chromosome determined in the post-sample G356 according to the size of the fragment. The resulting graph is almost identical to Figure 2.
- Step 6 Calculate the ratio of the number of DNA fragments from the chromosome to be tested in the DNA to all DNA fragments in the same sample, correct the ratio according to the GC content in the DNA fragment from the chromosome to be tested, and calculate The DNA from the chromosome to be tested in the sample to be tested The variation of the ratio after the fragment correction determines the copy number of the chromosome to be tested based on the degree of the mutation.
- the sequencing and alignment results of all the DNAs of any one or any interval between 100 bp and 250 bp of the sequence length of the DNA are calculated, and any point or any interval between 100 bp and 250 bp in the same sample is calculated.
- the calibration is performed, and the corrected ratio of the DNA fragments from the chromosome to be tested in the sample to be tested is calculated, and the copy number of the chromosome to be tested is determined according to the degree of the mutation. In the experiment, it was found that the sequencing and alignment of all the DNAs at any point or any interval between 100 bp and 250 bp in length can improve the accuracy of the real-risk results.
- the specific algorithm is as follows: Using a standard sample, the ratio of DNA fragments from the chromosome to be tested in the same sample to all DNA fragments is calculated, and the GC content in the DNA fragment from the chromosome to be tested can be known from the results of the sequencing. Based on the above ratio and GC content, a standard curve of GC content (Y-axis) and individual chromosomes or local chromosomes in total chromosome percentage (X-axis) was determined. The ratio of the chromosomes measured by the sample to be tested is corrected to a fixed GC value according to a function unique to the chromosome itself, and the arithmetic mean of the commonly used GC values is generally used.
- Figure 5 AH is a standard curve made based on the GC content of the DNA fragment from the chromosome to be tested in the sample and the ratio of the DNA fragment from the chromosome to be tested to the total DNA fragment.
- Table 1 The functions of forty pairs of chromosomes 2, 3, 4, 5, 6, 7, 8, 12, 13, 14, 18 and X are shown in Table 1: Table 1
- the GC content of the DNA fragments from chromosomes 1, 9, ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 10, 11, 15, 16, 17, 19, 20, 21 and 22, respectively, is derived from each chromosome.
- the ratio, a and b are constants, and JL a is a positive number.
- the ratio of the chromosomes measured by the sample to be tested is corrected to a fixed GC value according to the function of the chromosome itself, and the arithmetic mean of the commonly used GC values.
- y ax + b
- the DNA fragments from each chromosome in each sample account for the total
- the ratio X of the DNA fragment can be based on this function.
- the correction formula can be: a .
- X is the ratio of the DNA fragments from each chromosome to the total DNA fragment after correction
- ⁇ is the ratio of the detected sample to the total DNA fragment in the specified chromosome fragment
- y is the GC of the sample to be tested on the designated chromosome fragment Content
- ⁇ is the arithmetic mean GC value of the detected standard sample (a known normal sample, such as the known normal 14 standard samples detected in Example 1) on this chromosome
- a is the slope of this curve.
- the functions for each chromosome are shown in Tables 1 and 2; for different samples, the two values ⁇ and y are the measured values of the test-risk, and the two parameters vary with the sample to be tested.
- the variation of the corrected ratio X of each sample to be tested is calculated, and the number of copies of the chromosome to be tested or the local chromosome to be tested is determined according to the value Z of the mutation.
- the absolute value of Z is less than 3 as a normal detection error, and the absolute value of Z is greater than 3 as an abnormality.
- Tables 3, 4 and 5 below are samples G356, G397 (repeated 8 times), G426, G735, G756, G760, G763, G770, G778, G779, G780, G781, G824 and G825 by the method of Example 1.
- the above detection and calculation methods are not only suitable for detecting abnormalities in the entire chromatogram copy number, but also for detecting copy number abnormalities of local chromosomes.
- the following is an example of detecting the copy number of the embryo's chromosome 13 in the sample to be tested. As described above, a total of 15 maternal blood samples were taken, and the blood samples were subjected to high-speed centrifugation to obtain plasma samples from which blood cells were removed, and plasma of each sample.
- the amount is approximately 1 ml, and the sample codes are: G352, G362, G372, G383, G397 (repeated 8 times), G402, G409, G415, G424, G445, G440, G503, G588, G735 and G783. All of the above samples were obtained by Yan Ling's teachings from the Xiangya School of Medicine, Central South University. Detection of the possible presence of chromosome 13 trisomy. Using the standard curve for the No. 13 chromosome obtained above, the results of the test were tested.
- trisomy samples G445, G352 and G402 on chromosome 13 (three samples marked with a circle on the x-axis) Cannot be distinguished from normal samples (samples that are not labeled on the x-axis).
- the G445, G352, and G402 samples have a Z value of more than 3, which can be judged as 13 Chromosome trisomy.
- the remaining samples have Z values between -3 and +3.
- the following is an example of detecting the copy number of the embryo 18 in the sample to be tested. As described above, a total of 16 maternal blood samples were taken, and the blood samples were subjected to high-speed centrifugation to obtain plasma samples from which blood cells were removed, and plasma of each sample.
- the amount is approximately 1 ml, and the sample codes are: G362, G372, G383, G397 (repeated 8 times), G407, G409, G415, G424, G442, G432, G445, G440, G595, G588, G735 and G783.
- the above samples were collected by Professor Yan Lingwei from the Xiangya School of Medicine, Central South University. Detection of the possible presence of chromosome 18 trisomy. As shown in Fig. 7, the results of the detection were verified using the standard curve for chromosome 18 obtained above.
- the G424, G442, G432, G415, G595, and G407 samples have a Z value of more than 3, and can be judged to be the chromosome 18 trisomy.
- the remaining samples have Z values between -3 and +3.
- the following is an example of detecting the copy number of the embryo chromosome 21 in the sample to be tested. As described above, a total of 14 maternal blood samples were taken, and the blood samples were subjected to high-speed centrifugation to obtain plasma samples from which blood cells were removed, and plasma of each sample.
- the amount is approximately 1 ml, and the sample codes are: G267, G387, G393, G376, G397 (repeated 8 times), G405, G408, G409, G440, G491, G588, G641, G735 and G783.
- the above samples were collected by Professor Yan Lingwei from the Xiangya School of Medicine, Central South University.
- Fig. 9A the results of the detection were verified using the standard curve for chromosome 21 obtained above.
- the sample of chromosome 13 can be detected by its percentage of all chromosomes alone (1 on the X-axis and 3 on the X-axis) a sample marked with a vertical arrow).
- One of the samples is not significantly different from the normal sample (other diamond-marked samples) and may result in false negative detection of the sample.
- Kit for detecting embryo or tumor chromosome copy number corresponds to the detection method of Example 1, and the inventors of the present application have developed a kit that can be used to detect embryo or tumor chromosome copy number, which includes: A device for taking blood from a mother or a tumor patient, which may be any blood needle, syringe or the like which can be used for blood collection; a device suitable for separating blood cells and plasma in the blood, which may be suitable for use in a centrifuge Microtubules of blood or any other suitable container or device for separation; reagents and instruments for extracting DNA from the plasma, which may include: protease, saturated phenol, chloroform: isoamyl alcohol (24:1), sodium acetate, none Water ethanol, 70% ethanol, TE solution, and the like.
- Qiagen's DNA extraction kit can also be used to extract DNA from plasma (product number 57704) and any other reagents or containers that can be used for DNA extraction; making the DNA into a library for sequencing Reagents and Instruments
- the library for sequencing can be a library for double-ended short sequence sequencing, a library for single-ended long sequence sequencing, or a library for single-ended short sequence sequencing.
- the reagents and devices for making the DNA into a library for double-end short sequence sequencing include: T4 DNA ligase buffer with 10 mM ATP, lOmM dNTP Mix, T4 DNA polymerase, Klenow enzyme, T4 PNK (above)
- the reagents are provided by Illumina Sample Preparation Kit PE-102-1001) and ion exchange lipids that have affinity for DNA under specific circumstances to achieve separation of DNA. You can also select the QIAGEN QIAquick PCR Product Separation Kit (Product # 28104) or the QIAGEN MinElute PCR Product Isolation Kit (Product # 28004 ) and the reagents and instruments for sequencing the DNA.
- the reagents and devices for double-end short sequence sequencing can include: PE PCR primer PE 2.0, PE PCR primer PE 1.0, Phusion DNA polymerase (Finnzymes Oy) (The reagent is supplied by Illumina Sample Preparation Kit PE-102-1001.)
- Example 3 Another kit for detecting embryo or tumor chromosome copy number
- the inventors of the present application have developed another that can be used for A kit for detecting embryo or tumor chromosome copy number, comprising: A device for taking blood from a mother or a tumor patient, which may be any blood needle, syringe or the like that can be used for blood collection; a device suitable for separating blood cells and plasma in the blood, which may be suitable for use on a centrifuge a microtube containing blood or any other suitable container or device for separation; reagents and instruments for extracting DNA from the plasma, which may include: protease, saturated phenol, chloroform: is
- the reagents and instruments for separation may include: Qiongyue sugar powder (Biowest 11860), marker ( Takara lOObp DNA marker, product number D505A), etc.; and all DNAs at any point or any interval between 100 bp and 250 bp.
- the reagents and instruments for sequencing may include: a cutter that cuts a certain range of agarose gel. Preferably, it may comprise reagents and reagents that will recover DNA from the cut agarose gel for amplification and make it into a library for sequencing.
- Example 4 A device for detecting the copy number of an embryo or tumor chromosome
- a device for detecting an embryo or tumor chromosome copy number comprising: a detection module for sequencing DNA in a plasma sample of a maternal plasma or a tumor patient, the sequencing comprising preparing DNA in a plasma sample of a maternal plasma or a tumor patient
- the process of sequencing the library, sequencing the DNA in the maternal plasma sample which may include Illumina's cBot instrument and Illumina's Genome Analyzer or HiSeq2000 sequencer or ABI's SOLiD series of sequencers;
- the sequencing result of the DNA is aligned with the genomic sequence map to determine the length of each segment of DNA in the DNA from the chromosome and the length of each segment of the DNA, and the human genome standard sequence database hgl9 can be used;
- calculating a ratio of the number of DNA fragments from the chromosome to be tested in the same sample to all DNA fragments correcting the ratio according to the GC content in the DNA fragment from the chromosome to be tested; and calculating the sample to be tested a variation of the
- the detection module can detect all DNA fragments in the sample, or can detect only any point between 100 bp and 250 bp or any interval, such as 150 bp to 175 bp, which can be included by the upstream of the detection device.
- the fragment size of the DNA, the reagent and the device for separating the DNA in the maternal plasma may be a module or device for performing agarose gel electrophoresis.
- the invention is not limited to any specific combination of hardware and software.
- the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.
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Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HUE11866914A HUE031239T2 (en) | 2011-05-31 | 2011-05-31 | Device for determining the copy number of fetal chromosomes or tumor cell chromosomes |
EP11866914.2A EP2716766B1 (en) | 2011-05-31 | 2011-05-31 | A device for detecting copy number of fetal chromosomes or tumor cell chromosomes |
DK11866914.2T DK2716766T3 (da) | 2011-05-31 | 2011-05-31 | Indretning til detektering af kopiantal af føtale kromosomer eller tumorcellekromosomer |
US13/811,634 US9885080B2 (en) | 2011-05-31 | 2011-05-31 | Kit, a device and a method for detecting copy number of fetal chromosomes or tumor cell chromosomes |
RS20161036A RS55518B1 (sr) | 2011-05-31 | 2011-05-31 | Uređaj za detektovanje broja kopija fetalnih hromozoma ili hromozoma tumorske ćelije |
CN201180035510.7A CN103080336B (zh) | 2011-05-31 | 2011-05-31 | 检测胚胎或肿瘤染色体拷贝数的试剂盒、装置和方法 |
PL11866914T PL2716766T3 (pl) | 2011-05-31 | 2011-05-31 | Urządzenie do wykrywania liczby kopii chromosomów płodowych lub chromosomów komórek nowotworowych |
PT118669142T PT2716766T (pt) | 2011-05-31 | 2011-05-31 | Dispositivo para detectar o número de cópias de cromossomas fetais ou células tumorais |
PCT/CN2011/075037 WO2012162884A1 (zh) | 2011-05-31 | 2011-05-31 | 检测胚胎或肿瘤染色体拷贝数的试剂盒、装置和方法 |
ES11866914.2T ES2605372T3 (es) | 2011-05-31 | 2011-05-31 | Un dispositivo para detectar el número de copias de cromosomas fetales o cromosomas de células tumorales |
JP2014513025A JP5926795B2 (ja) | 2011-05-31 | 2011-05-31 | 胎芽又は腫瘍染色体のコピー数を検出するシステム及び装置 |
Applications Claiming Priority (1)
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PCT/CN2011/075037 WO2012162884A1 (zh) | 2011-05-31 | 2011-05-31 | 检测胚胎或肿瘤染色体拷贝数的试剂盒、装置和方法 |
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WO2012162884A1 true WO2012162884A1 (zh) | 2012-12-06 |
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PCT/CN2011/075037 WO2012162884A1 (zh) | 2011-05-31 | 2011-05-31 | 检测胚胎或肿瘤染色体拷贝数的试剂盒、装置和方法 |
Country Status (11)
Country | Link |
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US (1) | US9885080B2 (zh) |
EP (1) | EP2716766B1 (zh) |
JP (1) | JP5926795B2 (zh) |
CN (1) | CN103080336B (zh) |
DK (1) | DK2716766T3 (zh) |
ES (1) | ES2605372T3 (zh) |
HU (1) | HUE031239T2 (zh) |
PL (1) | PL2716766T3 (zh) |
PT (1) | PT2716766T (zh) |
RS (1) | RS55518B1 (zh) |
WO (1) | WO2012162884A1 (zh) |
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PL2716766T3 (pl) | 2017-09-29 |
RS55518B1 (sr) | 2017-05-31 |
CN103080336B (zh) | 2014-06-04 |
US9885080B2 (en) | 2018-02-06 |
EP2716766B1 (en) | 2016-09-28 |
ES2605372T3 (es) | 2017-03-14 |
HUE031239T2 (en) | 2017-07-28 |
JP5926795B2 (ja) | 2016-05-25 |
US20130130921A1 (en) | 2013-05-23 |
PT2716766T (pt) | 2016-11-21 |
EP2716766A4 (en) | 2014-11-26 |
DK2716766T3 (da) | 2017-01-02 |
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