WO2006001627A1 - Pna chip using plastic substrate coated with epoxy group-containing polymer, method of manufacturing the pna chip, and method of detecting single nucleotide polymorphism using the pna chip - Google Patents
Pna chip using plastic substrate coated with epoxy group-containing polymer, method of manufacturing the pna chip, and method of detecting single nucleotide polymorphism using the pna chip Download PDFInfo
- Publication number
- WO2006001627A1 WO2006001627A1 PCT/KR2005/001920 KR2005001920W WO2006001627A1 WO 2006001627 A1 WO2006001627 A1 WO 2006001627A1 KR 2005001920 W KR2005001920 W KR 2005001920W WO 2006001627 A1 WO2006001627 A1 WO 2006001627A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pna
- epoxy group
- plastic substrate
- chip
- polymer
- Prior art date
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- 239000002773 nucleotide Substances 0.000 title claims abstract description 6
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Definitions
- the present invention relates to a PNA (Peptide Nucleic Acid) chip, and more par ⁇ ticularly, to a PNA chip in which a probe PNA including a desired DNA sequence is immobilized on a plastic substrate coated with an epoxy group-containing polymer.
- PNA Peptide Nucleic Acid
- Background Art Peptide Nucleic Acids (referred to as 'PNAs', hereinafter) were originally developed as gene-targeting drugs. Due to good hybridization of PNAs with complementary DNAs, many reports about PNAs have been made. PNA/DNA hybridization is based on strong base pairing between PNA single strands and complementary DNA single strands.
- PNAs DNA recognition ability by stable hybridization with complementary DNAs.
- the structures of PNAs are very similar to those of DNAs.
- PNAs have a neutral peptide backbone unlike a negatively charged sugar-phosphate backbone of DNAs and N-(2-aminoethyl)glycine repeat units linked through an amide bond. It is known that four nucleobases contained in PNAs occupy similar spatial dimensions to four bases of DNAs and an inter- molecular distance of PNAs is also almost the same as that of DNAs.
- PNAs are not degraded by nuclease or protease, and thus are biologically very stable.
- a covalent bond between a support and a reactive group incorporated into oligonucleotides is mediated by a silane monolayer (Rogers et al., Anal Biochem. 1999), a self-assembled monolayer (Higashi et al., / Colloid Interface Sci. 1999), etc.
- immobilization of biological substances by a physical method such as adsorption is spatially or structurally restricted and has a detection limit such as high background signal due to nonspecific adsorption.
- epoxy silane can be coated on a glass substrate but not on a plastic substrate, substrate modification is restricted.
- the arrays of biomolecules or polymers may be manufactured by spotting, microarray technology, photolithography, or electronic addressing.
- the spotting is dropping of biomolecules on desired positions by three-dimensional movement of mi- crorobots and the microarray technology is microarray formation using fountain pen- like pins.
- the photolithography modifies a surface by selectively illuminating light on desired positions to adhere biomolecules to only the desired positions of the surface and the electronic addressing is carried out by selective application of an electrode voltage to a microelectrode array to immobilize biomolecules only on a predetermined electrode.
- a PNA array is made by non-contacting inkjet printing spotting.
- the present invention provides a novel PNA chip capable of immobilizing PNAs on a universal plastic substrate in an efficient and cost-effective manner.
- the present invention also provides a method of efficiently manufacturing the PNA chip.
- the present invention also provides a method of detecting SNP (Single Nucleotide Polymorphism) using the PNA chip.
- a PNA chip in which a probe PNA containing a desired DNA sequence is immobilized on a plastic substrate coated with an epoxy group-containing polymer.
- the plastic substrate may be any plastic substrate that can be coated with a polymer.
- the plastic substrate is a transparent plastic substrate made of a material selected from the group consisting of polymethyl ⁇ methacrylate (PMMA), polycarbonate (PC), polynorbornene, COC (Cyclic Olefin Copolymer), fluorinated polyimide, polystyrene (PS), SBC (Styrene Butadiene Copolymer), ABS (Acrylonitrile Butadiene Styrene), SAN (Styrene AcryloNitrile), and polysulfone.
- PMMA polymethyl ⁇ methacrylate
- PC polycarbonate
- COC Cyclic Olefin Copolymer
- fluorinated polyimide fluorinated polyimide
- PS polystyrene
- SBC Styrene Butadiene Copolymer
- ABS Acrylonitrile Butadiene Styrene
- SAN Styrene AcryloNitrile
- polysulfone A common plastic substrate is more inexpensive relative
- the epoxy group-containing polymer may be any polymer having an epoxy group but is preferably a copolymer of an epoxy group-containing acrylate monomer and an epoxy group-free acrylate monomer.
- the copolymer may be optionally selected according to the type of the plastic substrate.
- the content of epoxy groups in the copolymer can be adjusted by adjusting the weight ratio of the epoxy group-containing acrylate monomer.
- the use of an ap ⁇ intestinalte monomer can enhance proximity of the copolymer to PNAs.
- the epoxy group-containing polymer is a copolymer of an epoxy group-containing acrylate monomer and a highly viscous acrylate monomer, as represented by formula 1 below: [13] ⁇ Formula 1> [14] - [CRV-CRV-X] n - [15] wherein R is an epoxy group-containing ester , R is hydrogen or an alkyl group, and X is a highly viscous acrylate compound.
- the highly viscous acrylate monomer may be any acrylate monomer that can enhance UV-curable coating of acrylate (see T.
- the highly viscous acrylate monomer is an acrylate monomer with viscosity of 8-6,000 cp at 25 0 C , and is more preferably selected from the group consisting of dipentaerythritol hydroxypentaacrylate (DPHA), 9-ethyleneglycol diacrylate (9-EGDA), pentaerythritol tri-tetraacrylate (PETA), polyethyleneglycol 400 diacrylate, tripropyleneglycol diacrylate, trimethylol propane triacrylate, and dipentaerythritol hexaacrylate.
- DPHA dipentaerythritol hydroxypentaacrylate
- 9-EGDA 9-ethyleneglycol diacrylate
- PETA pentaerythritol tri-tetraacrylate
- polyethyleneglycol 400 diacrylate tripropyleneglycol diacrylate, trimethylol propane triacrylate, and dipentaerythritol hexaacrylate.
- the epoxy group-containing polymer is a copolymer of an epoxy group-containing acrylate monomer and an adhesive acrylate derivative capable of being adhered to the plastic substrate, as represented by formula 2 below: [18] ⁇ Formula 2> [19] - [CRV-CRV-CR ⁇ 3 -CR 2 R 3 ] n - [20] wherein R is an epoxy group-containing ester, R is alkylester, and R is hydrogen or an alkyl group.
- the adhesive acrylate derivative may be any aery late derivative which is similar to the type of a monomer constituting the plastic substrate so that a polymer composed of the acrylate derivative has similar physical properties to the plastic substrate to ensure easy adhesion of the polymer to the plastic substrate.
- the adhesive acrylate derivative is selected from the group consisting of methylmethacrylate (MMA), ethylacrylate, ethylmethacrylate (EMA), n- propylacrylate, n-propylmethacrylate, isopropylacrylate, and isoproylmethacrylate.
- the plastic substrate is made of polymethylmethacrylate (PMMA)
- PMMA polymethylmethacrylate
- MMA methylmethacrylate
- the content of epoxy groups in the epoxy group-containing polymer i.e., the content of an epoxy group-containing acrylate monomer in the epoxy group-containing polymer may range from 0.1 to 100 wt%, preferably 10 wt% or more, and more preferably 20-30 wt%. If the content of epoxy groups is less than 10 wt%, it may be difficult to accumulate PNAs in narrow areas due to low epoxy group density, thereby decreasing a fluorescence signal.
- an amine terminal group of the probe PNA may directly bind with an epoxy group of the epoxy group-containing polymer coated on the plastic substrate.
- a C carboxylic acid linker having an amine 5-8 group and presence or absence of ether to the amine terminal group of the probe PNA. The linker increases spatial directionality of the probe PNA, thereby optimizing PNA/ DNA hybridization.
- a method of manufacturing a PNA chip including: mixing an epoxy group-containing acrylate monomer, a highly viscous acrylate monomer, and a photoinitiator in a ratio of 10-90:80-5:1-10; coating the mixture on a plastic substrate; curing the mixture by UV; and spotting a probe PNA printing solution on the plastic substrate.
- a method of manufacturing a PNA chip including: mixing an epoxy group- containing acrylate monomer, an acrylate derivative having a similar physical property to a plastic substrate, and a radical initiator in a ratio of 10-99:1-89:0.1-0.5; radical- polymerizing the mixture; coating a solution obtained by dissolving the resultant polymer in a solvent on the plastic substrate; and spotting a probe PNA printing solution on the plastic substrate.
- a base of an appropriate concentration preferably 0.01-1.0 M, particularly preferably 0.05-0.5 M may be added to the probe PNA printing solution to efficiently perform a nucleophilic substitution reaction between an amine group of probe PNA and an epoxy group of a polymer to thereby assist immobilization of the probe PNA.
- the base may be a common base such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, or Lewis acid.
- the method of manufacturing the PNA chip in the presence of the radical initiator according to the present invention may further include storing the polymer-coated plastic substrate in a 30% or more humidity condition for 4 hours or more prior to spotting the probe PNA printing solution.
- the polymer-coated plastic substrate is stored in a less than 30% humidity condition, a reaction efficiency between the epoxy group and the amine group may be lowered, thereby leading to signal reduction. It is preferable to store the polymer-coated plastic substrate in a 50-95% humidity condition. The polymer-coated plastic substrate is stored for 4 hours or more to evaporate an organic solvent.
- a method of detecting SNP including: applying a target DNA-containing reaction sample to the above-described PNA chip; hybridizing probe PNA with target DNA; washing the PNA chip to remove a nonspecific reaction product; and detecting a flu ⁇ orescence signal based on PNA/DNA hybridization.
- the present invention provides an epoxy group-containing polymer material for biomolecule immobilization, as represented by formula 1 or 2 below: [31] ⁇ Formula 1> [32] - [CRV-CRV-X] - [33] ⁇ Formula 2> [34] - [CRV-CRV-CR ⁇ 3 -CR 2 R 3 ] - [35] wherein R is an epoxy group-containing ester of C , R is alkylester of C R is hydrogen or an alkyl group of C , X is a highly viscous acrylate compound, and 1-16 n depends on a monomer concentration and a reaction duration but may be 10 to 2,000.
- the polymer material is synthesized by UV curing (see T. Ja wornk, Macromol Symp., 159, 197, 2000; Cliff Roffey, 'Photogeneration of Reactive Species for UV Curing', 1997) or radical polymerization (see Bevington, J.C., in ' Comprehensive Polymer Science ⁇ VoI 3, 65 1989; Tedder, J.M., Angew. Chem., Int. Ed. Engl, 21, 401, 1982) using an acrylate compound.
- two or more acrylate monomers may be used. Various combinations of the two or more acrylate monomers enable appropriate adjustment of the content of epoxy groups, thereby providing a polymer material with an appropriate epoxy group content.
- an epoxy group- containing acrylate monomer and at least one highly viscous acrylate monomer are used.
- the acrylate monomers may be monomers having two or more vinyl groups.
- the present invention provides the composition of a UV curable coating solution, the composition ratio of the acrylate monomers, and efficient coating methods for UV curing.
- the highly viscous acrylate monomer may be dipentaerythritol hydroxypentaacrylate (DPHA), 9-ethyleneglycol diacrylate (9-EGDA), pentaerythritol tri-tetraacrylate (PETA), polyethyleneglycol 400 diacrylate, tripropyleneglycol diacrylate, trimethylol propane triacrylate, or dipentaerythritol hexaacrylate.
- DPHA dipentaerythritol hydroxypentaacrylate
- 9-EGDA 9-ethyleneglycol diacrylate
- PETA pentaerythritol tri-tetraacrylate
- polyethyleneglycol 400 diacrylate tripropyleneglycol diacrylate
- trimethylol propane triacrylate or dipentaerythritol hexaacrylate.
- the weight ratio of the epoxy group-containing acrylate monomer and the highly viscous acrylate monomer may range from 0.1:99.9 to 100:0. It is preferable to adjust the content of the epoxy group-containing acrylate monomer for biomolecule immobilization to 10 wt% or more.
- the radical polymerization may be performed at 90 0 C or less to prevent a ring- opening reaction of epoxy groups.
- the average molecular weight of a synthesized polymer can be adjusted by adjusting the reaction duration. It is preferable to perform the radical polymerization for 1 to 6 hours to prepare a desired coating solution and ensure coating transparency or crack prevention.
- a substrate to be coated with the above-described polymer layer may be a common silicon wafer or glass, preferably a plastic substrate, and more preferably a transparent plastic substrate. Conventionally, a well-processed expensive glass is mainly used as a chip substrate.
- the term 'transparent plastic substrate embraces substrates made of polymethylmethacrylate (PMMA), polycarbonate (PC), polynorbornene, COC (Cyclic Olefin Copolymer), fluorinated polyimide, polystyrene (PS), SBC (Styrene Butadiene Copolymer), ABS (Acrylonitrile Butadiene Styrene), SAN (Styrene Acry- loNitrile) or polysulfone.
- PMMA polymethylmethacrylate
- PC polycarbonate
- COC Cyclic Olefin Copolymer
- fluorinated polyimide fluorinated polyimide
- PS polystyrene
- SBC Styrene Butadiene Copolymer
- ABS Acrylonitrile Butadiene Styrene
- SAN Styrene Acry- loNitrile
- a coating of polymers for coating layer formation on plastic substrate may be ac ⁇ complished by dipping, spraying, printing method etc. It is preferable that the polymer- coated plastic substrate is used after stored in a 50% or more humidity condition. If the polymer-coated plastic substrate is stored in a low humidity condition, PNA immo ⁇ bilization efficiency may be lowered.
- strong immobilization of biomolecules, i.e., PNAs on an epoxy group-containing plastic substrate can be accomplished by an easy and inexpensive method such as microarray spotting in the presence of an appropriate concentration of a base (sodium hydroxide , potassium hydroxide , sodium carbonate , potassium carbonate , Lewis acid).
- a printing buffer containing a basic catalyst is prepared to bind amine groups of PNAs to epoxy groups coated on a substrate. Injection of the printing buffer using an inkjet arrayer provides easy and inexpensive immobilization of PNAs on a substrate surface. Preferably, the immobilization of PNAs is performed at about 23 0 C in a 50-60% humidity condition.
- the present invention provides optimal buffer solutions, reaction conditions, and efficient washing methods necessary for specific PNA/DNA hybridization using the above-prepared PNA array.
- a buffer solution for PNA/DNA hybridization may be a buffer solution containing 5X SSC, 5OmM HEPES, 1% SDS, and 0.1% BSA.
- probe PNAs can be im ⁇ mobilized on a universal plastic substrate in an efficient and cost-effective manner.
- the use of the probe PNA-immobilized substrate enables detection of various gene variations.
- FIG. 1 is a schematic sequential diagram illustrating coating of an epoxy group- containing polymer layer on a universal plastic substrate and immobilization of PNAs onto the polymer layer according to the present invention
- FIGS. 2A and 2B are respectively fluorescence images and array information for ev aluation results of a PNA immobilization rate with respect to the content of epoxy groups in a polymer layer according to the present invention
- FIG. 60 is a schematic sequential diagram illustrating coating of an epoxy group- containing polymer layer on a universal plastic substrate and immobilization of PNAs onto the polymer layer according to the present invention.
- FIG. 3 is graphic quantitative analysis data for the fluorescence images of FIG. 2A;
- FIG. 4 illustrates PNA/DNA hybridization results for PNA arrays to determine the optimal storage condition of the polymer-coated plastic substrate prior to PNA immo ⁇ bilization;
- FIGS. 5 A and 5B are respectively fluorescence image analysis data for PNA/DNA hybridization results with respect to target DNAs and array information;
- FIGS. 6A and 6B are graphic quantitative analysis data for PNA/DNA hy ⁇ bridization results with respect to the content of epoxy groups for rtL180 wild and rtL180 mutant, respectively;
- FIG. 4 illustrates PNA/DNA hybridization results for PNA arrays to determine the optimal storage condition of the polymer-coated plastic substrate prior to PNA immo ⁇ bilization
- FIGS. 5 A and 5B are respectively fluorescence image analysis data for PNA/DNA hybridization results with respect to target DNAs and array information
- FIGS. 6A and 6B are graphic quantitative analysis data for PNA
- FIG. 7A is a schematic diagram illustrating a linker used for optimizing PNA/DNA hybridization according to the present invention and FIG. 7B illustrates chemical structural formulae for various types of the linker;
- FIGS. 8A and 8B are respectively fluorescence images and spot arrays for PNA/ DNA hybridization mediated by linkers according to the present invention;
- FIGS. 9 A and 9B are graphic quantitative analysis data for the fluorescence images of FIG. 8A; and
- FIGS. 1OA and 1OB are quantitative analysis data for detection sensitivity of PNA/ DNA hybridization with respect to the concentration of probe PNAs.
- Example 1 Preparation of epoxy group-containing polymer-coated substrate by UV curing
- Glycidoxymethylmethacrylate (GMA) intended for epoxy group incorporation, 9-ethyleneglycol diacrylate (9-EGDA), and a photoinitiator (Irgacure 184, Ciba-Geigy Chemical Co.) were mixed in an appropriate ratio (10-90:80-5:1-10). After the pho ⁇ toinitiator was completely dissolved, the resultant mixture was coated on a polymethyl ⁇ methacrylate (PMMA) substrate using a spin coater at 500 rpm for 6 seconds and then at 1,000-4,000 rpm for 20 seconds.
- PMMA polymethyl ⁇ methacrylate
- the resultant substrate was exposed to 254 nm UV in a nitrogen environment and dried.
- the above method is not limited to an acrylate monomer and a plastic substrate and may be applied to various types of monomers and substrates.
- the thus produced epoxy group-containing polymer had the following formula: -[CH 2 C(CH 3 )(C(O)OCH 2 CHCH 2 )CH ⁇ H(C(O)O(CH 2 CH 2 O) 9 C(O)CHCH )]n-.
- the UV curing using DPHA or PETA instead of 9-EGDA can produce a polymer of GMA and DPHA or PETA.
- Example 1 is a schematic sequential diagram illustrating coating of an epoxy group-containing polymer layer on a universal plastic substrate and immobilization of PNAs onto the epoxy group-containing polymer layer according to the present invention.
- Example 2 Preparation of epoxy group-containing polymer-coated substrate by radical polymerization
- Glycidoxymethylmethacrylate (GMA) intended for epoxy group incorporation, methylmethacrylate (MMA), a radical initiator (2,2,6, 6-tetramethyl-4-piperidinol, TMPO), and a molecular weight adjustor were mixed in an appropriate ratio (99-10:1-89:0.1-0.5:0.1-0.5). The mixture was made heated at 75 0 C for 2 hours and then at 90 0 C for 0.5-3 hours.
- the epoxy group-containing polymer had the following formula: -[CH C(CH )(C(O)OCH CHCH 2 )CH 2 C(CH )(C(O)OCH )]n-, and an average molecular weight (Mw) of 75,000 to 250,000.
- a polymer of GMA and EMA can be prepared in the same manner as in the above-described radical polymerization using EMA instead of MMA.
- the polymer-coated substrate was stored in a 50% or more humidity condition for 4 hours or more before use. If the polymer-coated substrate is stored in a low humidity condition, reaction efficiency between epoxy groups and amine groups may be lowered, resulting in signal reduction.
- PM/MM ratio represents the average fluorescence signal ratio of a perfect match (PM) to a mismatch (MM) in DNA/ PNA hybridization, and a signal difference between PM and MM results from a single base difference.
- a higher PM/ MM ratio represents more excellent specificity of probe PNAs to target DNAs.
- Example 3 PN A-Cy 3 immobilization
- degree of PNA immobilization with respect to GMA content was evaluated using the polymer-coated plastic substrates prepared in Examples 1 and 2.
- Cy3-labelled PNA rtL-180w (PNAGENE. Inc) is immobilized on the above substrate.
- Printing solution preparation and spotting were performed according to the following Example 4 .
- the plastic substrates had different epoxy contents of 20%, 30%, 40%, and 50% by adjusting the GMA content.
- the degree of immobilization of the PNA rtL-180W could be directly determined by fluorescence intensity of the Cy3-labelled PNA rtL-180w.
- FIG. 3 is graphic quantitative analysis data for the fluorescence images of FIG. 2A.
- the flu ⁇ orescence intensity (SfB ratio) of a spotting composition containing no PNA-cy3 was used as a background signal.
- PNA immobilization rate was the greatest at the epoxy contents of 20% and 30%. Even at the epoxy contents of 40% and 50%, PNA immobilization occurred with no problem.
- the PNA rtL-180w used in this Example had the following sequence: [75] rtL180w: N terminal (5') - GTTTCTCC*TGGCT- C terminal (3')-Cy3 (SEQ ID NO: 2) [76]
- Example 4 Printing solution preparation and PNA array fabrication [77] PNA oligonucleotides (13-mer, PANAGENE, Inc.) were dissolved in 5OuM distilled water. As the PNA oligonucleotides, there were used PNA A, rtL-180w, and rtL-180m. The PNA A was used as a positive control of PNA/DNA hybridization.
- the rtL-180w was a specific sequence of HBV (hepatitis B virus) RNA polymerase (Genelnjnc), and the rtL-180m was a changed sequence of HBV RNA polymerase resulting in lamivudine -resistance.
- the difference between the rtL-180w and the rtL- 180m was only one base (C-A).
- the rtL-180w and the rtL-180m were used as test sequences for identification of SNPs (Single Nucleotide Polymorphisms).
- a 0.1N NaOH solution was used to assist PNA immobilization.
- the solution obtained by dissolving the PNA oligonu ⁇ cleotides in the distilled water and the NaOH solution were mixed in a ratio of 1:1-0.5 and loaded in a 96-well plate.
- the prepared samples were spotted on PMMA substrates using an inkjet arrayer (Cartesian) and then stored in humidity of 50% or more and at a temperature of 23-24 0 C for 16 hours to induce sufficient reaction between epoxy groups and amine groups. During the spotting, humidity was increased to uniformly maintain a spot size.
- the probe PNA oligonucleotides (13-mers) used in this Example had the following sequences: [79] Probe A (artificial sequence): N terminal (5') - TTCCACC AGATGG - C terminal (3') (SEQ ID NO: 1) [80] Probe W (rtL- 180w): N terminal (5') - GTTTCTCC*TGGCT- C terminal (3') (SEQ ID NO: 2) [81] Probe M (rtL- 18Qm): N terminal (5') - GTTTCTCA*TGGCT- C terminal (3') (SEQ ID NO: 3) [82] Example 5: On-Chip-Reaction and SNP detection [83] The PNA-immobilized PMMA substrates prepared in Example 4 were washed with distilled water for 5 minutes to remove residual NaOH followed by hybridization without separate blocking.
- hybridization buffer containing 5X SSC (pH 7.0 buffer containing sodium chloride and sodium citrate), 5OmM HEPES, 1% SDS, and 0.1% BSA.
- DNAs (IpM-IOOnM) labeled with fluorescent dye, named cyanine3 (Cy3) were used as targets.
- a target DNA in hybridization solution was denatured at 94 0 C for 5 minutes and then incubated at 42 0 C for 60 minutes.
- PNAs have a one degree higher melting temperature (Tm) (per one base) relative to DNAs.
- FIGS. 5A and 5B illustrate graphic quantitative analysis data for PNA/DNA hybridization results with respect to the content of epoxy groups for the rtL-180w and rtL-180m, re ⁇ spectively. From FIGS. 6 A and 6B, it can be seen that PNA/DNA hybridization occurs at the greatest level at epoxy contents of 20% and 30%.
- Target A 5' Cy3- CCATCTGGTGGAA-3' (SEQ ID NO: 4)
- Target W 5' Cy3- AGCCAG*GAGAAA-3' (SEQ ID NO: 5)
- Target M 5' Cy3- AGCCAT*GAGAAA-3' (SEQ ID NO: 6).
- Example 6 PNA/DNA hybridization bv PNA linker
- FIG. 7A is a schematic diagram illustrating a linker used for optimizing PNA/DNA hybridization according to the present invention and FIG. 7B illustrates chemical structural formulae for various types of the linker.
- a O-linker is 2-(2-aminoethoxy)ethoxy acetic acid
- an M-linker is 2-aminoethoxy acetic acid
- a C-linker is 6-aminohexanoic acid.
- the amine group-containing acid is attached to PNAs via a peptide bond, and an amine group of the amine group-containing acid reacts with an epoxy group of an epoxy-group containing polymer layer like in the above-described Examples to immobilize the PNAs onto the polymer layer .
- the linkers attached to PNA prevent the immobilized PNA from aggregation on the surface and make PNA molecules representative to the target DNA molecules. As a result, the linker which functions as a spacer improve accessibility of probe PNA to the taget DNA .
- epoxy group-containing polymer-coated substrates with epoxy contents of 20% and 30% providing the greatest efficiency of PNA immo ⁇ bilization and PNA/DNA hybridization .
- PNA immobilization and PNA/DNA hy ⁇ bridization were performed in the same manner as in Examples 4 and 5 except that a linker was used .
- FIGS.8 A and 8B Fluorescence images and array information for evaluation results of PNA/DNA hybridization mediated by various types of linkers are respectively il ⁇ lustrated in FIGS.8 A and 8B.
- the types of linkers and PNAs are represented in the spot arrays of FIG. 8B.
- H 0+NaOH is a negative control
- rtL-W(M) is common wild-type (mutant) PNAs with no linkers
- O-W(M) is O-linker attached ItLW(M) PNAs
- M-W(M) is M-linker attached TtLW(M) PNAs
- C6-W is C ⁇ -linker attached rtLW PNAs.
- PNA-cy3 is used as a position marker.
- FIGS. 9A and 9B are graphic quantitative analysis data of the fluorescence images of FIG. 8A.
- rtLW(M) is linker- free common wild- type (mutant) PNAs
- rtLW(M)-3 is O-linker attached rtLW(M) PNAs
- rtLW(M)-4 is M-linker attached TtLW(M) PNAs
- rtLW(M)-5 is C6-linker attached rtLW(M) PNAs.
- FIGS. 1OA and 1OB illustrate quantitative analysis data for detection sensitivity of PNA/DNA hybridization with respect to the concentration of probe PNAs.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP05765833A EP1759016A4 (en) | 2004-06-24 | 2005-06-21 | Pna chip using plastic substrate coated with epoxy group-containing polymer, method of manufacturing the pna chip, and method of detecting single nucleotide polymorphism using the pna chip |
CA002563948A CA2563948A1 (en) | 2004-06-24 | 2005-06-21 | Pna chip using plastic substrate coated with epoxy group-containing polymer, method of manufacturing the pna chip, and method of detecting single nucleotide polymorphism using thepna chip |
JP2007513078A JP4510080B2 (en) | 2004-06-24 | 2005-06-21 | PNA chip using plastic substrate coated with epoxy group-containing polymer, method for producing the PNA chip, and method for detecting single base gene mutation using the PNA chip |
CN2005800161981A CN1957093B (en) | 2004-06-24 | 2005-06-21 | PNA chip using plastic substrate coated with epoxy group-containing polymer, method of manufacturing the PNA chip, and method of detecting single nucleotide polymorphism using the PNA chip |
AU2005257596A AU2005257596B2 (en) | 2004-06-24 | 2005-06-21 | PNA chip using plastic substrate coated with epoxy group-containing polymer, method of manufacturing the PNA chip, and method of detecting single nucleotide polymorphism using the PNA chip |
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KR1020040047677A KR100766752B1 (en) | 2004-06-24 | 2004-06-24 | PNA chip using plastic substrate coated with polymer having epoxy groups |
KR10-2004-0047677 | 2004-06-24 |
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PCT/KR2005/001920 WO2006001627A1 (en) | 2004-06-24 | 2005-06-21 | Pna chip using plastic substrate coated with epoxy group-containing polymer, method of manufacturing the pna chip, and method of detecting single nucleotide polymorphism using the pna chip |
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US (1) | US7696130B2 (en) |
EP (1) | EP1759016A4 (en) |
JP (1) | JP4510080B2 (en) |
KR (1) | KR100766752B1 (en) |
CN (1) | CN1957093B (en) |
AU (1) | AU2005257596B2 (en) |
CA (1) | CA2563948A1 (en) |
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Cited By (2)
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EP2311977A1 (en) | 2009-10-15 | 2011-04-20 | INSERM (Institut National de la Santé et de la Recherche Medicale) | Method for predicting responsiveness of a patient to a chemoradiation treatment |
WO2012120129A1 (en) | 2011-03-10 | 2012-09-13 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Methods and pharmaceutical composition for the treatment of infectious diseases |
Families Citing this family (8)
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KR100653975B1 (en) * | 2004-11-30 | 2006-12-05 | 한국과학기술원 | PNA Chip Using Zip-code and Fabricating Method Thereof |
KR100725579B1 (en) * | 2005-02-16 | 2007-06-08 | 주식회사 엘지생명과학 | PNA chip for genotyping mycobacteria species using plastic substrate coated with polymer having epoxy groups and method for genotyping mycobacteria species using the PNA chip |
US9051667B2 (en) * | 2007-10-26 | 2015-06-09 | Wisconsin Alumni Research Foundation | Substrate independent copolymers for biofunctionalization |
KR100943421B1 (en) * | 2007-12-24 | 2010-02-19 | 연세대학교 산학협력단 | Photopolymerizable monomers having epoxide and undaturated double bonds and their composition |
US10006909B2 (en) | 2012-09-28 | 2018-06-26 | Vibrant Holdings, Llc | Methods, systems, and arrays for biomolecular analysis |
AU2016382985A1 (en) * | 2015-12-28 | 2018-07-19 | Vibrant Holdings, Llc | Substrates, systems, and methods for nucleic acid array synthesis |
EP3438662A4 (en) * | 2016-03-31 | 2020-01-22 | Furukawa Electric Co., Ltd. | Cell holding chip and screening method using cell holding chip |
US10538808B2 (en) | 2017-05-26 | 2020-01-21 | Vibrant Holdings, Llc | Photoactive compounds and methods for biomolecule detection and sequencing |
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WO2011045414A1 (en) | 2009-10-15 | 2011-04-21 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Method for predicting responsiveness of a patient to a chemoradiation treatment |
WO2012120129A1 (en) | 2011-03-10 | 2012-09-13 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Methods and pharmaceutical composition for the treatment of infectious diseases |
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EP1759016A1 (en) | 2007-03-07 |
JP4510080B2 (en) | 2010-07-21 |
TW200600586A (en) | 2006-01-01 |
JP2007536554A (en) | 2007-12-13 |
CN1957093A (en) | 2007-05-02 |
TWI282371B (en) | 2007-06-11 |
US7696130B2 (en) | 2010-04-13 |
EP1759016A4 (en) | 2008-10-08 |
AU2005257596A1 (en) | 2006-01-05 |
CN1957093B (en) | 2011-04-13 |
CA2563948A1 (en) | 2006-01-05 |
US20060147949A1 (en) | 2006-07-06 |
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KR100766752B1 (en) | 2007-10-17 |
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