CN107881243A - The method and purposes of the fluorescence quantitative PCR detection differentiated for the cow-bezoar true and false - Google Patents
The method and purposes of the fluorescence quantitative PCR detection differentiated for the cow-bezoar true and false Download PDFInfo
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- CN107881243A CN107881243A CN201711041967.4A CN201711041967A CN107881243A CN 107881243 A CN107881243 A CN 107881243A CN 201711041967 A CN201711041967 A CN 201711041967A CN 107881243 A CN107881243 A CN 107881243A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- 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
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6888—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- 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
- C12Q1/6844—Nucleic acid amplification reactions
- C12Q1/686—Polymerase chain reaction [PCR]
Abstract
The present invention relates to a kind of probe primer and detection method of the fluorescence quantitative PCR detection differentiated for the cow-bezoar true and false, can be used in carrying out authenticity to cow-bezoar class medicinal material, prescribed preparation and other Related products.Present invention also offers the purposes that probe primer is used for the fluorescence quantitative PCR detection that the cow-bezoar true and false differentiates, the probe primer is SEQ ID NO:Probe primer group shown in 13,46,79,10 12,13 15 and/or 16 18.Methods described uses quantitative fluorescent PCR sonde method, detects due animal derived materials and unnecessary animal derived materials in sample.It is methods described high specificity, high sensitivity, reproducible applied to the quality control of cow-bezoar class medicinal material, prescribed preparation and other Related products.
Description
Technical field
The invention belongs to pharmaceutical technology field, is related to medicine and differentiates that detection method, more particularly to one kind are used for the cow-bezoar true and false
The probe primer and detection method of the fluorescence quantitative PCR detection of discriminating.
Background technology
Natural ox gallstone is the drying gall stone of bovid ox (Bos taurus domesticus Gmelin), is mainly contained
There are the compositions such as bilirubin, bile acid, cholesterol, inorganic elements, protein and amino acid, there is waking up the patient from unconsciousness by clearing away heart fire, removing heat in the liver for detoxication, slit
Phlegm ceases wind and other effects, it is one of rare traditional Chinese medicine [1-2].Expensive due to its resource scarcity, China is the 1950s
Mid-term is to have started the research of substitute i.e. cultural calculus bovis, In vitro cultured Calculus Bovis and calculus bovis factitius.
Cultural calculus bovis is to utilize cattle on the hoof body, is inserted in the method for surgical operation in the gall-bladder of ox and causes the yellow factor, is allowed to raw
Into cow-bezoar.In vitro cultured Calculus Bovis are according to the principle and Biochemical processes formed in calcium bilirubinate calculus body, using modern times life
Thing engineering technology, the principle and Biochemical processes that the internal gall stone of simulation is formed in cattle gallbladder bile in vitro, cultivates ox courage
Red pigment calcium calculus.Calculus bovis factitius is added by bilein, cholic acid, hyodesoxycholic acid, taurine, bilirubin, cholesterol, trace element etc.
Work is made.
Because cultivating artificial calculus bovis under the conditions of the specific ecological factor of natural ox gallstone identical with forming, after measured its
Physicochemical property, nature and flavor, color and luster, content of drug effect components etc. and natural ox gallstone no significant difference.And In vitro cultured Calculus Bovis are in character, knot
It is similar with natural ox gallstone in terms of structure, composition and Contents of Main Components.Calculus bovis factitius then differs greatly [3-7] with natural ox gallstone.
Cow-bezoar is widely used in prescribed preparation, shortage of resources, particularly natural ox gallstone and cultural calculus bovis, the production cycle
It is long, yield poorly, belong to precious rare medicinal material, recent in the market exposes the situation for mixing pseudo- fraud repeatedly.It is such existing in order to prevent
The generation of elephant, there is an urgent need to develop new detection means, strengthen supervision, the quality of cow-bezoar class medicinal material is better controlled.
The content of the invention
The present invention establishes probe primer and the detection of a kind of fluorescence quantitative PCR detection differentiated for the cow-bezoar true and false first
Method, it can be used in the identification of cow-bezoar class medicinal material and its Related product.
On the one hand, it is including following the invention provides a kind of fluorescent quantitative PCR detection method differentiated for the cow-bezoar true and false
Step:
Weigh cow-bezoar sample and sample pre-treatments;
DNA is extracted from the sample and prepares DNA profiling;And
Select probe primer;
Optimize reaction condition;
The DNA profiling is expanded using the probe primer;
For amplification, positive findings is judged according to the CT values critical point of setting;
Wherein, methods described can be used in detecting in the sample due calf-derived Cyclospora and it is unnecessary including pig,
Other animal derived components such as horse, donkey, sheep.
In some embodiments, the probe primer is one or more groups of in following groups:Serial No. SEQ
ID NO 1-3,4-6,7-9,10-12,13-15,16-18 probe primer.Wherein every group of probe primer includes three sequences, and
And when it is any group of be used to detect when wherein included three sequences be to use simultaneously without splitting.
In other embodiments, the probe primer is Serial No. SEQ ID NO 13-15 and/or 16-18
Probe primer.In other embodiments, the probe primer be Serial No. SEQ ID NO 1-3,4-6,7-9 and/or
10-12 probe primer.
In one embodiment of the invention, the sample is cow-bezoar class Chinese medicine or the prescribed preparation containing cow-bezoar.
In one embodiment of the invention, the step of extraction DNA is quantified using ultraviolet spectrophotometry
And purity testing.
In one embodiment of the invention, the step of selecting probe primer is by investigating specificity and sensitivity, choosing
It is the cytb group probe primers for pig to select the probe primer, for CO I or the ATP probe primers of horse, for the CO I of ox
Probe primer, or LOOP the or ND5 probe primers for donkey.
In one embodiment of the invention, the reaction condition includes:94 DEG C of pre-degenerations 5min, 94 DEG C of denaturation 30s,
60 DEG C of annealing 45s, 60 DEG C of collection fluorescence.
In one embodiment of the invention, when the probe primer is cytb group probe primers, the setting
The critical point of CT values is 40, i.e., is determined as positive findings as CT value < 40.
What the detection method was used is the TaqMan probe method in quantitative fluorescent PCR.Its main original of TaqMan probe method
Reason is to distinguish mark fluorescent reporter group and quenching group at probe both ends.When primed probe is specifically bound with DNA profiling
When, the 5 prime excision enzyme activity of archaeal dna polymerase cuts off probe, and fluorophor separate out is so as to detecting fluorescence signal;Work as probe
Or primer, when can not combine template, probe is in good working condition, and the fluorescence of reporter group is quenched group absorptions, therefore detects not
To fluorescence signal [8-11].The present inventor has found TaqMan probe method due to the dual work by probe and primer by studying
With compared with regular-PCR method and dye method fluorescence quantitative PCR method, specificity is more preferable, due to being sentenced by means of the production of fluorescence signal
Determine result, its high sensitivity.The present invention research show, based on above feature, this method be particularly suitable for use in target DNA content compared with
Less or the sample that there may be several species to mix, there is good application prospect in drug assay.
On the other hand, the purposes of the fluorescence quantitative PCR detection of cow-bezoar true and false discriminating is used for the invention provides probe primer,
Wherein described probe primer is SEQ ID NO:Probe primer shown in 1-3,4-6,7-9,10-12,13-15 and/or 16-18
Group, wherein every group of probe primer includes three sequences, and when any group of for three sequences wherein included when detecting
It is to use simultaneously without splitting.
The probe primer of the present invention and methods described can be used in cow-bezoar class Chinese medicine or the into square system containing cow-bezoar
The detection of agent.In addition, the probe primer and methods described of the present invention can be additionally used in horse/Niu Yuan of meat, gelatin crude drug etc.
Property composition detection.
Another further aspect, the invention provides the probe primer of designed, designed, and it is by SEQ ID NO:13-15 or 16-18 institutes
The DNA sequence dna composition shown.
The present inventor has found that histocyte content is less in cow-bezoar class medicinal material, and DNA abundance is relatively low, and use is general by studying
Logical PCR method is difficult to detect, and the DNA in wherein various sources can be readily possible to detect with TaqMan probe method.Except
TaqMan probe, can also use MGB probes, the difference of distinguishable 1 base of the type probe, can be applied to Genotyping,
Virus variation etc. detects.
Brief description of the drawings
Fig. 1 is the curve that two groups of probe primers amplification pig DNA template situations are described according to one embodiment of the present invention,
Wherein:A and B corresponds to cytb groups (SEQ ID NO respectively:1-3) and ND2 groups situation.
Fig. 2 is the positives sample (the cultural calculus bovis adulterant of the derived component containing pig) according to one embodiment of the present invention
Amplification curve (SEQ ID NO:1-3).
Fig. 3 is description pig cytb probe primers (SEQ ID NO:The situation of other common nearly edge species 1-3) is expanded, wherein
A, B and C is the curve expanded to donkey, horse, Niu Laiyuan DNA respectively.
Fig. 4 describes result (the SEQ ID NO to same sample 3 repeated experiments according to one embodiment of the present invention:
1-3)。
Fig. 5 A-5B are ox probe primer (the SEQ ID NO of designed, designed:16-18) detect the knot of ox-hide and cow-bezoar sample
Fruit.Wherein A, B, C and D are the song expanded to the DNA in ox-hide, natural ox gallstone, cultural calculus bovis, calculus bovis factitius source respectively
Line.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail, these embodiments are only illustrative
, therefore it should not be constructed as limitation of the scope of the invention.
First, instrument and reagent
Real-time fluorescence quantitative PCR instrument (AB 7500FAST), assay balance (Mettler AB135-S), pure water meter
(Millipore companies), ball milling instrument (M400, Retsch), micro ultraviolet specrophotometer, supercentrifuge, metal heater.
Blood/tissue/cellular genome extracts kit (DP304, Tiangeng biochemical technology Co., Ltd),Universal
Master Mix II, probe and primer.
2nd, sample collection
Collect 3 batches, cultural calculus bovis adulterant Guangxi, 2 batches, Sichuan, each 1 batch of cultural calculus bovis certified products, natural ox gallstone, calculus bovis factitius
(table 1).
Table 1, sample message table
Sample number into spectrum | Sample ID | The place of production/source |
PZNH_WP01 | Cultural calculus bovis adulterant | Guangxi |
PZNH_WP02 | Cultural calculus bovis adulterant | Guangxi |
PZNH_WP03 | Cultural calculus bovis adulterant | Sichuan |
PZNH_WP04 | Cultural calculus bovis adulterant | Sichuan |
PZNH-HZ | Cultural calculus bovis adulterant | Guangxi |
PZNH_SD | Cultural calculus bovis certified products | Shaanxi Province is provided |
NH_SD | Natural ox gallstone | National Institute for Food and Drugs Control's control medicinal material |
RGNH_SD | Calculus bovis factitius | National Institute for Food and Drugs Control's control medicinal material |
2nd, the foundation of fluorescent quantitative PCR detection method
1st, DNA is extracted
Extracted using the kit of common extraction animal tissue, carrying out quantitative and purity using ultraviolet spectrophotometry surveys
It is fixed, the inventors discovered that general 10mg or so samples, 20~100ng or so DNA can be obtained;These DNA are dissolved in 50uL systems
In TE, 0.5~1uL is taken as template, and the CT values of testing result are typically below 30 or 30 or so.DNA purity OD260/280
1.7 are often extremely difficult to, but is influenceed for final testing result little.In this way for template DNA quantity and
Quality tolerance is good.
2nd, the selection of probe primer
Two groups of probe primers for being directed to pig (Sus scrofa breed) are found from document, respectively positioned at cytochrome
B (cytb) and NADH dehydrogenase subunit 2 (ND2).Cytb groups probe primer can be carried out to the DNA profiling of pig
Effectively amplification, is presented typical S types amplification curve, CT values are 20 or so.ND2 groups occur without typical S types curve, i.e., can not be to pig
DNA profiling carry out effectively expand (Fig. 1).Therefore this method selection cytb group probe primers are tested.Equally to ox, horse,
The specific probe of donkey is screened.
According to a kind of embodiment, the present invention relates to the sonde method of fluorescence quantifying PCR method, is included in probe/primer sequence
Different fluorescence signals or non-fluorescence signal mark (such as FAM, TAMARA, BQ etc.), different type probe under row same case are (such as
TaqMAN probes, MGB probes etc.).
In the selection of probe/primer, the existing screening to having reported probe/primer, the suitable testing goal is found
Optimal probe/primer (investigating specificity and sensitivity), also there is new probe/primer of designed, designed.
In some embodiments, used probe primer of the invention is as shown in table 2.
Table 2, probe primer
Note:(1) every group of probe primer includes three sequences, and in experiment while use can not be split;(2) sequence 1-3 is used for
The pig derived component in sample is detected, sequence 4-6 is used to detect the horse derived component in sample, and sequence 7-9 and 10-12 are used to examine
Donkey derived component in test sample product, sequence 13-15 are used to detect the horse derived component in sample, and sequence 16-18 is used to detect sample
Calf-derived Cyclospora in product;(3) sequence 1-3,4-6,7-9,10-12 be quoted from document, sequence 13-15,16-18 be the present inventor from
Row design;(4) sequence information is also found in the sequence table appended by the application.
3rd, the selection of reaction condition
Reaction condition selects conventional TaqMan probe method quantitative fluorescent PCR condition, i.e. 94 DEG C of pre-degeneration 5min;94 DEG C of denaturation
30s, 60 DEG C of annealing 45s, 60 DEG C of collection fluorescence, positive controls can obtain the amplification curve (Fig. 1) of more typical S types.Amplification
Generally reach plateau at 46~48 at the latest, therefore collect fluorescence signal altogether to 50 circulations (Fig. 2).
4th, the determination of CT values critical point
By taking cultural calculus bovis as an example, the CT values of positive are typically smaller than 35, do not find the situation more than 40 (such as Fig. 2 institutes
Show), therefore positive findings CT value critical points are scheduled on 40, i.e. CT values < 40 is determined as positive findings, detects pig derived component.Equally
Method determines that positive findings during other probe in detecting judges CT values.
5th, the species specificity of probe primer is investigated
With the special probe primer of pig, donkey, horse, Niu Laiyuan DNA are expanded respectively, gone out without typical S types curve
Existing, i.e., result is all negative (Fig. 3).It can be seen that the specificity of the probe primer is good.Equally the specificity of other probes is entered
Row test.
6th, applicability is investigated
5 batches of cultural calculus bovis adulterants, 1 batch of cultural calculus bovis certified products are have detected using this method.5 batches of adulterants all detect pig source
Property composition, 1 batch of certified products do not detect pig derived component (table 3).It can be seen that this method applicability is good.
The testing result of table 3, cow-bezoar class medicinal material sample
7th, Intermediate precision
By taking cultural calculus bovis medicinal material as an example, in once testing, two repetition experimental groups of cultural calculus bovis control medicinal material are
Negative findings;5 batches of cultural calculus bovis adulterants, the difference (Δ CT) of two parallel test group CT value is between 0.14~0.95 (table 2).
8th, it is repeated
By taking cultural calculus bovis medicinal material as an example, same positive (the cultural calculus bovis adulterant of the derived component containing pig) uses this method
Test in triplicate, obtain consistent results, i.e., all detect three times and contain pig derived component (Fig. 4) in the sample.It can be seen that this method
It is repeated good.
9th, calf-derived Cyclospora detects in cow-bezoar class medicinal material
Using the ox probe primer of designed, designed, situation containing calf-derived Cyclospora in several different cow-bezoar class medicinal materials is detected.
As a result it all successfully detected calf-derived Cyclospora in natural ox gallstone, cultural calculus bovis, calculus bovis factitius.Ox-hide is wherein selected as positive
Compare (Fig. 5 A-5B).
3rd, summarize and discuss
Natural ox gallstone is the cholecystolithiasis that ox is formed under field conditions (factors), resource-constrained, though cultural calculus bovis is artificial farming
Production, but because the production cycle is grown, yield poorly, market demand is again very big, so still falling within precious rare medicinal material, mixes puppet
Fakement phenomena is than more serious, and the adulterant of the especially derived component containing pig is more common, and there is an urgent need to it is strengthened supervising.
True and false discriminating is the most accurate from the judgement of DNA angles, and the DNA based on TaqMAN probes that this method is used points
Sub- discrimination method, due to the dual identification of probe and primer, specificity is substantially increased compared with regular-PCR method, believed based on fluorescence
Number detection means largely improve the sensitivity of method again.Such method high specificity, high sensitivity, repeatability
It is good, the precedent of application is there is no so far in Chinese medicine calibrating, therefore it is urgent and necessary to establish this method.
Histocyte content is less in cow-bezoar class medicinal material sample, and DNA amount to obtain is smaller.This method high sensitivity is applied to
The inspection of this kind of medicinal material of cultural calculus bovis, it is its advantage, however, this require that experimenter has received regular molecular biology test skill
It can train, correct experimental implementation, and in operation, pay attention to preventing extraneous contamination from disturbing.This method repeatability is good, as long as
Operation is strictly regulated, and typically can preferably prevent the situation of false negative or false positive.Apply this method to practice examining work
In work, can sternly hit in the market cow-bezoar class medicinal material mixes pseudo- fakement phenomena, so as to the quality control for cow-bezoar class medicinal material and city
Field supervision provides strong technical support.
Some specific embodiments are described in detail herein, but this is intended only as saying goal of the invention example
It is bright, the scope without limiting following claims.It should be appreciated that different substitutions to concrete scheme described herein, change and
Modification is all without departing from the connotation and extension defined in the claims in the present invention, so as to belong to the application hair claimed
Bright scope.
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Claims (11)
1. a kind of fluorescent quantitative PCR detection method differentiated for the cow-bezoar true and false, comprises the steps:
Weigh cow-bezoar sample and sample pre-treatments;
DNA is extracted from the sample and prepares DNA profiling;And
Select probe primer;
Optimize reaction condition;
The DNA profiling is expanded using the probe primer, wherein when the probe primer and the DNA profiling are special
Property combine when, the 5 prime excision enzyme activity of archaeal dna polymerase cuts off probe, fluorophor separate out so as to detect fluorescence signal,
When probe or primer can not combine template, probe is in good working condition, and the fluorescence of reporter group is quenched group absorptions, therefore
It can't detect fluorescence signal;
For amplification, positive findings is judged according to the CT values critical point of setting;
Wherein, methods described can be used in detecting in the sample due calf-derived Cyclospora and unnecessary non-ox source property into
Point.
2. according to the method for claim 1, wherein one group or more in following groups of the probe primer used
Group:Serial No. SEQ ID NO 1-3,4-6,7-9,10-12 probe primer.
3. according to the method for claim 2, wherein every group of probe primer includes three sequences, and it is used for when any group of
Three wherein included sequences are used simultaneously without splitting during detection.
4. according to the method for claim 1, wherein the sample is cow-bezoar class Chinese medicine or the prescribed preparation containing cow-bezoar.
5. according to the method for claim 1, wherein the step of extraction DNA is quantified using ultraviolet spectrophotometry
And purity testing.
6. according to the method for claim 1, wherein the step of selecting probe primer, which passes through, investigates specificity and sensitivity, choosing
The probe primer is selected as the cytb group probe primers for pig, CO I groups or ATP group probe primers for horse, for ox
CO I probe primers, or the ND5 probe primers for donkey.
7. according to the method for claim 1, wherein the reaction condition includes:94 DEG C of pre-degeneration 5min, 94 DEG C of denaturation
30s, 60 DEG C of annealing 45s, 60 DEG C of collection fluorescence.
8. according to the method for claim 1, wherein when the probe primer is cytb group probe primers, the setting
The critical point of CT values is 40, i.e., is determined as positive findings as CT value < 40.
9. probe primer is used for the purposes for the fluorescence quantitative PCR detection that the cow-bezoar true and false differentiates, wherein the probe primer is sequence
Number it is SEQ ID NO:Probe primer group shown in 1-3,4-6,7-9 and/or 10-12.
10. purposes according to claim 9, wherein every group of probe primer includes three sequences, and work as any group of use
Three wherein included sequences are used simultaneously without splitting when detection.
11. purposes according to claim 9, wherein the sample of the cow-bezoar detected is cow-bezoar class Chinese medicine or contains ox
Yellow prescribed preparation.
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