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Thomas-Chemin O, Séverac C, Trévisiol E, Dague E. Indentation of living cells by AFM tips may not be what we thought! Micron 2023; 174:103523. [PMID: 37595406 DOI: 10.1016/j.micron.2023.103523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/08/2023] [Accepted: 08/08/2023] [Indexed: 08/20/2023]
Abstract
The models used to calculate Young's moduli from atomic force microscopy (AFM) force curves consider the shape of the indentation. It is then assumed that the geometry of the indentation is identical to the geometry of the indenter, which has been verified for hard materials (E > 1 MPa). Based on this assumption, the force curves calculated by these models, for the same object with a given Young's modulus, are different if the indenter geometry is different. On the contrary, we observe experimentally that the force curves recorded on soft living cells, with pyramidal, spherical, or tipless indenters, are almost similar. This indicates that this basic assumption on the indentation geometry does not work for soft materials (E of the order of 5 kPa or less). This means that, in this case, the shape of the indentation is therefore different from the shape of the indenter. Indentation of living cells by AFM is not what we thought!
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Affiliation(s)
| | - Childérick Séverac
- RESTORE Research Center, Université de Toulouse, INSERM, CNRS, EFS, ENVT, Université P. Sabatier, Toulouse, France
| | | | - Etienne Dague
- LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France.
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Foncy J, Estève A, Degache A, Colin C, Cau JC, Malaquin L, Vieu C, Trévisiol E. Fabrication of Biomolecule Microarrays for Cell Immobilization Using Automated Microcontact Printing. Methods Mol Biol 2018; 1771:83-95. [PMID: 29633206 DOI: 10.1007/978-1-4939-7792-5_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Biomolecule microarrays are generally produced by conventional microarrayer, i.e., by contact or inkjet printing. Microcontact printing represents an alternative way of deposition of biomolecules on solid supports but even if various biomolecules have been successfully microcontact printed, the production of biomolecule microarrays in routine by microcontact printing remains a challenging task and needs an effective, fast, robust, and low-cost automation process. Here, we describe the production of biomolecule microarrays composed of extracellular matrix protein for the fabrication of cell microarrays by using an automated microcontact printing device. Large scale cell microarrays can be reproducibly obtained by this method.
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Affiliation(s)
- Julie Foncy
- Laboratory for Analysis and Architecture of Systems (LAAS-CNRS), Université de Toulouse, CNRS, INSA, Toulouse, France
| | - Aurore Estève
- Laboratory for Analysis and Architecture of Systems (LAAS-CNRS), Université de Toulouse, CNRS, INSA, Toulouse, France
| | | | - Camille Colin
- Laboratory for Analysis and Architecture of Systems (LAAS-CNRS), Université de Toulouse, CNRS, INSA, Toulouse, France
| | | | - Laurent Malaquin
- Laboratory for Analysis and Architecture of Systems (LAAS-CNRS), Université de Toulouse, CNRS, INSA, Toulouse, France
| | - Christophe Vieu
- Laboratory for Analysis and Architecture of Systems (LAAS-CNRS), Université de Toulouse, CNRS, INSA, Toulouse, France
| | - Emmanuelle Trévisiol
- Laboratory for Analysis and Architecture of Systems (LAAS-CNRS), Université de Toulouse, CNRS, INSA, Toulouse, France.
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Marchand R, Thibault C, Carcenac F, Vieu C, Trévisiol E. Integration of solid-state nanopores into a functional device designed for electrical and optical cross-monitoring. Biomed Microdevices 2017; 19:60. [DOI: 10.1007/s10544-017-0195-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fredonnet J, Foncy J, Cau JC, Séverac C, François JM, Trévisiol E. Automated and Multiplexed Soft Lithography for the Production of Low-Density DNA Microarrays. Microarrays (Basel) 2016; 5:E25. [PMID: 27681742 PMCID: PMC5197944 DOI: 10.3390/microarrays5040025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/15/2016] [Accepted: 09/20/2016] [Indexed: 01/22/2023]
Abstract
Microarrays are established research tools for genotyping, expression profiling, or molecular diagnostics in which DNA molecules are precisely addressed to the surface of a solid support. This study assesses the fabrication of low-density oligonucleotide arrays using an automated microcontact printing device, the InnoStamp 40(®). This automate allows a multiplexed deposition of oligoprobes on a functionalized surface by the use of a MacroStamp(TM) bearing 64 individual pillars each mounted with 50 circular micropatterns (spots) of 160 µm diameter at 320 µm pitch. Reliability and reuse of the MacroStamp(TM) were shown to be fast and robust by a simple washing step in 96% ethanol. The low-density microarrays printed on either epoxysilane or dendrimer-functionalized slides (DendriSlides) showed excellent hybridization response with complementary sequences at unusual low probe and target concentrations, since the actual probe density immobilized by this technology was at least 10-fold lower than with the conventional mechanical spotting. In addition, we found a comparable hybridization response in terms of fluorescence intensity between spotted and printed oligoarrays with a 1 nM complementary target by using a 50-fold lower probe concentration to produce the oligoarrays by the microcontact printing method. Taken together, our results lend support to the potential development of this multiplexed microcontact printing technology employing soft lithography as an alternative, cost-competitive tool for fabrication of low-density DNA microarrays.
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Affiliation(s)
- Julie Fredonnet
- ITAV, Université de Toulouse, CNRS, UPS, Toulouse 31000, France.
| | - Julie Foncy
- ITAV, Université de Toulouse, CNRS, UPS, Toulouse 31000, France.
- LISBP, Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, Toulouse F-31077, France.
| | | | | | - Jean Marie François
- ITAV, Université de Toulouse, CNRS, UPS, Toulouse 31000, France.
- LISBP, Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, Toulouse F-31077, France.
- Dendris SAS, 335 Rue du Chêne Vert, Labège 31670, France.
| | - Emmanuelle Trévisiol
- ITAV, Université de Toulouse, CNRS, UPS, Toulouse 31000, France.
- CNRS, LAAS, 7 Avenue du Colonel Roche, F-31400 Toulouse, France.
- LAAS, Univ de Toulouse, F-31400 Toulouse, France.
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Flores-Juárez CR, Leberre Anton V, Trévisiol E, Antaramian A, González-Jasso E, Pless RC. Hybridisation of N4-methylcytosine-containing amplicons on DNA microarrays. J Biotechnol 2014; 189:143-9. [PMID: 25238723 DOI: 10.1016/j.jbiotec.2014.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/02/2014] [Accepted: 09/08/2014] [Indexed: 11/27/2022]
Abstract
5'-Cy5-labelled PCR amplicons containing the analogue base, N(4)-methylcytosine, instead of cytosines were compared in microarray hybridisation experiments with the corresponding amplicons containing the canonical set of bases, with respect to the intensity of the fluorescence signal obtained, and cross hybridisation to non-corresponding probes. In general, higher hybridisation temperatures resulted in reduced signal intensities, particularly in the case of the N(4)-methylcytosine containing amplicons. At the lower hybridisation temperatures tested (40 °C, 30 °C), these modified amplicons gave about equal or stronger fluorescence signal than the corresponding regular amplicons. With the two GC-richest amplicons tested, in one instance the N(4)-methylated target gave a dramatically higher signal intensity than the unmodified amplicon, interpreted as reflecting the reduced formation of hairpin structures in the target sequence, due to the lower thermodynamic stability of the G:N(4)-methylC base pair, making the target more accessible, while in the other case no hybridisation was observed with either version of the amplicon, probably due to interference from a G-tetrad structure. Both for the regular and the N(4)-methylated amplicons, no significant cross hybridisation was seen in these experiments.
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Affiliation(s)
| | - Véronique Leberre Anton
- Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France; INRA, UMR792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France
| | - Emmanuelle Trévisiol
- Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France; INRA, UMR792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France
| | - Anaid Antaramian
- Instituto de Neurobiología, Universidad Autónoma de México, Juriquilla, Querétaro 76230, Mexico
| | - Eva González-Jasso
- CICATA, Instituto Politécnico Nacional, Querétaro, Querétaro 76090, Mexico
| | - Reynaldo C Pless
- CICATA, Instituto Politécnico Nacional, Querétaro, Querétaro 76090, Mexico.
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Coutable A, Thibault C, Chalmeau J, François JM, Vieu C, Noireaux V, Trévisiol E. Preparation of tethered-lipid bilayers on gold surfaces for the incorporation of integral membrane proteins synthesized by cell-free expression. Langmuir 2014; 30:3132-3141. [PMID: 24568716 DOI: 10.1021/la5004758] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
There is an increasing interest to express and study membrane proteins in vitro. New techniques to produce and insert functional membrane proteins into planar lipid bilayers have to be developed. In this work, we produce a tethered lipid bilayer membrane (tBLM) to provide sufficient space for the incorporation of the integral membrane protein (IMP) Aquaporin Z (AqpZ) between the tBLM and the surface of the sensor. We use a gold (Au)-coated sensor surface compatible with mechanical sensing using a quartz crystal microbalance with dissipation monitoring (QCM-D) or optical sensing using the surface plasmon resonance (SPR) method. tBLM is produced by vesicle fusion onto a thin gold film, using phospholipid-polyethylene glycol (PEG) as a spacer. Lipid vesicles are composed of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) and 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-poly(ethyleneglycol)-2000-N-[3-(2-pyridyldithio)propionate], so-called DSPE-PEG-PDP, at different molar ratios (respectively, 99.5/0.5, 97.5/2.5, and 95/5 mol %), and tBLM formation is characterized using QCM-D, SPR, and atomic force technology (AFM). We demonstrate that tBLM can be produced on the gold surface after rupture of the vesicles using an α helical (AH) peptide, derived from hepatitis C virus NS5A protein, to assist the fusion process. A cell-free expression system producing the E. coli integral membrane protein Aquaporin Z (AqpZ) is directly incubated onto the tBLMs for expression and insertion of the IMP at the upper side of tBLMs. The incorporation of AqpZ into bilayers is monitored by QCM-D and compared to a control experiment (without plasmid in the cell-free expression system). We demonstrate that an IMP such as AqpZ, produced by a cell-free expression system without any protein purification, can be incorporated into an engineered tBLM preassembled at the surface of a gold-coated sensor.
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Affiliation(s)
- Angélique Coutable
- Université de Toulouse , INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France
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Egea AMC, Trévisiol E, Vieu C. Direct patterning of probe proteins on an antifouling PLL-g-dextran coating for reducing the background signal of fluorescent immunoassays. Biointerphases 2013; 8:37. [DOI: 10.1186/1559-4106-8-37] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 09/23/2013] [Indexed: 11/10/2022] Open
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Chaize B, Nguyen M, Ruysschaert T, le Berre V, Trévisiol E, Caminade AM, Majoral JP, Pratviel G, Meunier B, Winterhalter M, Fournier D. Microstructured liposome array. Bioconjug Chem 2006; 17:245-7. [PMID: 16417276 DOI: 10.1021/bc050273p] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Conversion of a DNA chip to a nanocapsule array was performed by grafting on a liposome an oligonucleotide complementary to an oligonucleotide bound to the array. Each liposome may be loaded by a soluble molecule or may present a hydrophobic or amphiphilic molecule inserted in its wall. To detect liposomes on the chip, we used fluorescent dyes encapsulated in the liposome internal volume or fluorescent lipids. We observed that an oligonucleotide-grafted liposome containing a defined dye specifically accumulated on the area where its complementary oligonucleotide had been spotted on the array. The virtually unlimited amount of addresses allows the specific binding of large amounts of liposomes in one single batch.
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Affiliation(s)
- Barnabé Chaize
- Institut de Pharmacologie et de Biologie Structurale, 205, route de Narbonne 31077 Toulouse Cedex, France
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Bourget C, Trévisiol E, Bridon I, Kotera M, Lhomme J, Laayoun A. Biotin-phenyldiazomethane conjugates as labeling reagents at phosphate in mono and polynucleotides. Bioorg Med Chem 2005; 13:1453-61. [PMID: 15698761 DOI: 10.1016/j.bmc.2004.12.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2004] [Revised: 12/15/2004] [Accepted: 12/20/2004] [Indexed: 11/17/2022]
Abstract
Molecules 2-5 that include in their structure a biotin moiety as detectable unit and differently substituted phenyl diazo functions as reactive group were prepared as reagents for labeling the phosphate group in mono and polynucleotides. These molecules were shown to react selectively and quantitatively with the model nucleotide 3'-UMP. They were used successfully in the labeling step of DNA and RNA analysis using high-density DNA-chips (or microarrays) technology.
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Affiliation(s)
- Cécile Bourget
- LEDSS-UMR5616 associé au CNRS, BP53, Université Joseph Fourier, 38041 Grenoble, France
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Thibault C, Le Berre V, Casimirius S, Trévisiol E, François J, Vieu C. Direct microcontact printing of oligonucleotides for biochip applications. J Nanobiotechnology 2005; 3:7. [PMID: 15992404 PMCID: PMC1184096 DOI: 10.1186/1477-3155-3-7] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Accepted: 07/01/2005] [Indexed: 11/10/2022] Open
Abstract
Background A critical step in the fabrication of biochips is the controlled placement of probes molecules on solid surfaces. This is currently performed by sequential deposition of probes on a target surface with split or solid pins. In this article, we present a cost-effective procedure namely microcontact printing using stamps, for a parallel deposition of probes applicable for manufacturing biochips. Results Contrary to a previous work, we showed that the stamps tailored with an elastomeric poly(dimethylsiloxane) material did not require any surface modification to be able to adsorb oligonucleotides or PCR products. The adsorbed DNA molecules are subsequently printed efficiently on a target surface with high sub-micron resolution. Secondly, we showed that successive stamping is characterized by an exponential decay of the amount of transferred DNA molecules to the surface up the 4th print, then followed by a second regime of transfer that was dependent on the contact time and which resulted in reduced quality of the features. Thus, while consecutive stamping was possible, this procedure turned out to be less reproducible and more time consuming than simply re-inking the stamps between each print. Thirdly, we showed that the hybridization signals on arrays made by microcontact printing were 5 to 10-times higher than those made by conventional spotting methods. Finally, we demonstrated the validity of this microcontact printing method in manufacturing oligonucleotides arrays for mutations recognition in a yeast gene. Conclusion The microcontact printing can be considered as a new potential technology platform to pattern DNA microarrays that may have significant advantages over the conventional spotting technologies as it is easy to implement, it uses low cost material to make the stamp, and the arrays made by this technology are 10-times more sensitive in term of hybridization signals than those manufactured by conventional spotting technology.
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Affiliation(s)
- C Thibault
- LAAS-CNRS, 7, avenue du Colonel Roche 31077 TOULOUSE Cedex 4
| | - V Le Berre
- Biochips Platform Genopole Toulouse, UMR-CNRS 5504 & INRA 792, 135, avenue de Rangueil, 31077 TOULOUSE Cedex 4
- Laboratoire de Biotechnologie & Bioprocédés, UMR-CNRS 5504 & INRA 792, 135, avenue de Rangueil, 31077 TOULOUSE Cedex 4
| | - S Casimirius
- LAAS-CNRS, 7, avenue du Colonel Roche 31077 TOULOUSE Cedex 4
| | - E Trévisiol
- Biochips Platform Genopole Toulouse, UMR-CNRS 5504 & INRA 792, 135, avenue de Rangueil, 31077 TOULOUSE Cedex 4
- Laboratoire de Biotechnologie & Bioprocédés, UMR-CNRS 5504 & INRA 792, 135, avenue de Rangueil, 31077 TOULOUSE Cedex 4
| | - J François
- Biochips Platform Genopole Toulouse, UMR-CNRS 5504 & INRA 792, 135, avenue de Rangueil, 31077 TOULOUSE Cedex 4
- Laboratoire de Biotechnologie & Bioprocédés, UMR-CNRS 5504 & INRA 792, 135, avenue de Rangueil, 31077 TOULOUSE Cedex 4
| | - C Vieu
- LAAS-CNRS, 7, avenue du Colonel Roche 31077 TOULOUSE Cedex 4
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Bourget C, Trévisiol E, Lhomme J, Kotera M, Tora C, Bernal-Mendez E, Laayoun A. Aryldiazomethane derivatives as reagents for site specific labeling of nucleic acids at phosphate. Nucleosides Nucleotides Nucleic Acids 2003; 22:1371-3. [PMID: 14565421 DOI: 10.1081/ncn-120022968] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
An efficient and direct labeling method based on direct alkylation of nucleic acids at phosphates by aryldiazomethane derivatives is described.
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Affiliation(s)
- Cécile Bourget
- Université Joseph Fourier, LEDSS-UMR5616 associé au CNRS, Grenoble, France
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Laayoun A, Sothier I, Menou L, Bernal-Méndez E, Kotera M, Bourget C, Trévisiol E, Lhomme J, Troesch A. Labeling during cleavage of nucleic acids for their detection on DNA chips. Nucleosides Nucleotides Nucleic Acids 2003; 22:649-52. [PMID: 14565245 DOI: 10.1081/ncn-120022603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A new and efficient strategy for labeling of nucleic acids prior to their hybridization on high density DNA chip has been developed. Our approach which combines the fragmentation and the labeling is based on the reactivity of the terminal phosphates of cleaved DNA and RNA fragments with a reporter molecule bearing aryldiazomethane group.
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Affiliation(s)
- A Laayoun
- BioMérieux, Advanced Technology, Chemin de l'Orme, Marcy l'Etoile, France.
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Laayoun A, Kotera M, Sothier I, Trévisiol E, Bernal-Méndez E, Bourget C, Menou L, Lhomme J, Troesch A. Aryldiazomethanes for Universal Labeling of Nucleic Acids and Analysis on DNA Chips. Bioconjug Chem 2003; 14:1298-306. [PMID: 14624647 DOI: 10.1021/bc0341371] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
DNA and RNA labeling and detection are key steps in nucleic acid-based technologies, used in medical research and molecular diagnostics. We report here the synthesis, reactivity, and potential of a new type of labeling molecule, m-(N-Biotinoylamino)phenylmethyldiazomethane (m-BioPMDAM), that reacts selectively and efficiently with phosphates in nucleotide monomers, oligonucleotides, DNA, and RNA. This molecule contains a biotin as detectable unit and a diazomethyl function as reactive moiety. We demonstrate that this label fulfills the requirements of stability, solubility, reactivity, and selectivity for hybridization-based analysis and especially for detection on high-density DNA chips.
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Affiliation(s)
- Ali Laayoun
- BioMérieux, Advanced Technology/Molecular Diagnostics, Marcy l'Etoile, France.
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Le Berre V, Trévisiol E, Dagkessamanskaia A, Sokol S, Caminade AM, Majoral JP, Meunier B, François J. Dendrimeric coating of glass slides for sensitive DNA microarrays analysis. Nucleic Acids Res 2003; 31:e88. [PMID: 12907740 PMCID: PMC169980 DOI: 10.1093/nar/gng088] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2003] [Revised: 06/03/2003] [Accepted: 06/03/2003] [Indexed: 11/13/2022] Open
Abstract
Successful use and reliability of microarray technology is highly dependent on several factors, including surface chemistry parameters and accessibility of cDNA targets to the DNA probes fixed onto the surface. Here, we show that functionalisation of glass slides with homemade dendrimers allow production of more sensitive and reliable DNA microarrays. The dendrimers are nanometric structures of size-controlled diameter with aldehyde function at their periphery. Covalent attachment of these spherical reactive chemical structures on amino-silanised glass slides generates a reactive approximately 100 A layer onto which amino-modified DNA probes are covalently bound. This new grafting chemistry leads to the formation of uniform and homogenous spots. More over, probe concentration before spotting could be reduced from 0.2 to 0.02 mg/ml with PCR products and from 20 to 5 micro M with 70mer oligonucleotides without affecting signal intensities after hybridisation with Cy3- and Cy5-labelled targets. More interestingly, while the binding capacity of captured probes on dendrimer-activated glass surface (named dendrislides) is roughly similar to other functionalised glass slides from commercial sources, detection sensitivity was 2-fold higher than with other available DNA microarrays. This detection limit was estimated to 0.1 pM of cDNA targets. Altogether, these features make dendrimer-activated slides ideal for manufacturing cost-effective DNA arrays applicable for gene expression and detection of mutations.
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Affiliation(s)
- Véronique Le Berre
- Transcriptome-Biochips Platform of Genopole Toulouse Midi-Pyrénées, Centre de Bioingénierie Gilbert Durand UMR-CNRS 5504, UMR-INRA 792, Institut National des Sciences Appliquées, F-31077 Toulouse cedex 04, France
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Trévisiol E, Le Berre-Anton V, Leclaire J, Pratviel G, Caminade AM, Majoral JP, François JM, Meunier B. Dendrislides, dendrichips: a simple chemical functionalization of glass slides with phosphorus dendrimers as an effective means for the preparation of biochips. NEW J CHEM 2003. [DOI: 10.1039/b307928g] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Trévisiol E, Renard A, Defrancq E, Lhomme J. Fluorescent labelling of oligodeoxyribonucleotides by the oxyamino-aldehyde coupling reaction. Nucleosides Nucleotides Nucleic Acids 2000; 19:1427-39. [PMID: 11092313 DOI: 10.1080/15257770008033852] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
We describe the reaction of oligonucleotides containing an aldehydic group at the 5'-end or inside the sequence with an oxyamino label. The reaction was found to be highly selective and represents an efficient method for derivatization of oligonucleotides.
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Affiliation(s)
- E Trévisiol
- Chimie BioOrganique, LEDSS, UMR 5616, Université Joseph Fourier, Grenoble, France
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Trévisiol E, Renard A, Defrancq E, Lhomme J. The oxyamino-aldehyde coupling reaction: An efficient method for the derivatization of oligonucleotides. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)10335-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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