Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
  • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
  • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
  • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
  • G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
  • G01N33/544—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being organic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J19/0046—Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
  • C07K1/04—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length on carriers
  • C07K1/045—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length on carriers using devices to improve synthesis, e.g. reactors, special vessels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00709—Type of synthesis
  • B01J2219/00711—Light-directed synthesis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B82—NANOTECHNOLOGY
  • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
  • B82Y5/00—Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery

Definitions

• the present application relates to the general field of grafting proteins onto a substrate and, in particular, grafting proteins in a predefined pattern onto a substrate by optical means.
• the international application published under the number WO 2016/050980 (hereinafter referred to as the "Studer publication”) concerns a micro-structured or pattern-based grafting method of proteins on a printing or photochemical substrate, in which the The substrate is covered with a nano-scale antifouling layer (between 1 nm and 20 nm), that is to say a nonstick layer for living cells.
• This type of nonstick layer is particularly a polymer brush or a polymer and in particular a PEG brush (polyethylene glycol).
• a nonstick layer for proteins is intended to be contacted with protein solutions, necessarily aqueous solutions in this known process, and is therefore insoluble in water to the extent necessary for its use.
• Such a layer is also intended to be illuminated by radiation in the absorption spectrum of benzophenone (between 300 nm and 400 nm) and is therefore resistant to this radiation, to the extent necessary for its printing.
• the method of the Studer publication essentially consists in putting in contact with or depositing on a surface-treated substrate with a PEG brush a drop of an aqueous solution of a benzophenone and then illuminating the nanometric layer of the brush, in the presence of the drop, with wavelength radiation included in the absorption spectrum of the benzophenone (between 300 nm and 400 nm) in a predefined pattern.
• the substrate obtained is selectively adhesive for the proteins in the illuminated areas; it then makes it possible to print or deposit proteins and then cells on the substrate and their multiplication only in the zones of the reason, ie according to a specific adhesion.
• the benzophenone used in the Studer publication is necessarily a benzophenone soluble in a solvent which is water, so that it can be put into the form of an aqueous solution.
• the invention relates to a product for the printing of proteins, comprising a substrate, a first nanometric, non-stick polymer layer for the proteins deposited on the substrate, and a second solid layer of benzophenone deposited on the substrate.
• first layer The second solid layer is soluble in a solvent, and the first layer is insoluble in the solvent.
• soluble will be understood in this specification as the property for a solid material to be able to be dissolved in a given solvent.
• solvent will be understood herein to mean a liquid capable of dissolving a solid or dispersing its molecules or atoms.
• layer will be understood in the present disclosure as a film of material which is solid, in particular pasty or gelled, with the exclusion of a film of liquid material.
• the thickness of a layer may be either constant for a film with flat and parallel faces, or variable for a curved or curved film (in particular, dome).
• deposited will be understood in this presentation as "in mechanical contact”.
• this word will designate a form of mechanical contact without relative displacement of the atoms of the material with respect to the substrate or without flow and will mean “hooked”
• this word will designate a mechanical contact with possible flow or relative displacement of the atoms of the material and the liquid, relative to the substrate.
• thin or “nanometric” layer will be understood in this specification as a layer of thickness between 1 nm and 2000 nm, without excluding layers thinner than one nanometer and anti-adhesive for proteins.
• the second layer is soluble in a polar solvent
• the first layer is a brush of a polymer
• the substrate is a glass
• the second layer is soluble in water, in ethanol or in isopropanol;
• the polymer is a polyethylene glycol (PEG).
• the invention also relates to a method comprising the following steps:
• first nanometric, nonstick polymer layer for proteins depositing on the substrate a first nanometric, nonstick polymer layer for proteins; depositing on the first layer a second layer of a benzophenone, the second layer being soluble in a solvent and the first layer being insoluble in this solvent.
• This method makes it possible to obtain or manufacture a product for the printing of proteins as previously described.
• the second layer is deposited on the first layer according to the following steps:
• the second layer is deposited on the first layer by a physical deposition of the benzophenone, vapor phase (PVD).
• PVD vapor phase
• the method comprises the following additional steps:
• the method comprises the following additional steps:
• Figure 1 shows an example of a product for printing proteins.
• the first nonstick layer 3 is in mechanical contact with the substrate 1 and the benzophenone layer 2, and the first nonstick layer 3 is disposed between the second layer 2 and the glass substrate 1.
• the substrate 1 may be flat, as shown.
• the substrate 1 is, in a manner known from the prior art, covered with the first non-stick polymer layer 3 for living cells, or non-stick layer, or antifouling layer ("antifouling"). English) within the meaning of the Studer publication mentioned above.
• This first layer is in this first embodiment, a polymer brush and the polymer is a PEG (polyethylene glycol).
• This first layer 3 is deposited on the substrate 1 by means known from the prior art.
• a liquid solution of a water-soluble benzophenone is prepared from a crystalline powder of the soluble benzophenone, non-transparent in the visible in this powdery form, and de-ionized water.
• Soluble benzophenone is, for example, of the chemical formula: (4-benzoylbenzyl) trimethylammonium chloride.
• One drop or several drops of the solution is then deposited on the first layer 3 until the liquid solution is spread on the substrate, ie on the substrate covered with the first layer, to obtain on its surface a solution film. , with parallel faces or undulating or curved.
• the resulting system can be baked, for example at 70 ° C. or allowed to dry naturally at room temperature, to dry the solution by evaporation.
• the same method would apply for a solvent that would not be water provided that the solvent used is compatible with the first layer 3. This gives, after drying, a second layer 2 more or less hard transparent benzophenone, ie not crystallized.
• any benzophenone having, once deposited in a layer, a transparency in the visible or a non-crystallization is in accordance with the teaching of the present disclosure and can therefore be used in the context of the invention.
• the layer may be obtained by evaporation of a solution of benzophenone in a solvent, or by any other method of depositing a layer of this benzophenone on the first layer 3.
• the non-crystallization of the benzophenone layer obtained allows the photo-printing of patterns by illumination of the first layer 3, without degradation of the layer 3 due to the crystals.
• the photo-printing is carried out with a radiation in the absorption spectrum of the benzophenone, through the second layer 2 or through the substrate 1, chosen sufficiently transparent to the illumination radiation.
• an illumination for example in the visible, at grazing incidence, of this second layer 2 conveniently reveals, on the external surface of the second layer 2, the patterns that have been imaged on the first layer 3, disposed at the internal surface of the second layer 2, without having to access the first layer 3.
• the photoprinting of patterns is thus durable and recognizable to the naked eye on the surface of the second layer 2, which makes it easy to distinguish a photo-printed layer from a non-photo-printed layer.
• the radiation used to illuminate the patterns will be of a wavelength or a spectrum located in the absorption band of benzophenone, which is between 300 nm and 400 nm.
• the layer can be scratched to measure its thickness and layers greater than 100 microns can be easily obtained. It is also possible to control the initial amount of benzophenone solution to obtain a controlled layer thickness. Those skilled in the art will be able to determine in each case the finest layer that can be reached by simple execution operations.
• reducing the thickness of the layer makes it possible to avoid or minimize interference of the radiation between the faces of the layers, and errors of printing of the patterns. It is also possible to use solvent mixtures to homogenize the spreading of the layer, these solvents then being removed.
• the product once the benzophenone layer obtained, can be stored and transported easily without special precautions. It can be insolated on an optical system without means of microfluidic or fluidic, to oppose the drying or evaporation of a drop of aqueous benzophenone solution, which would be necessary in the method of publication Studer, to obtain a constant concentration of benzophenone above the first layer during illumination, so as to also obtain a controlled subsequent adhesion for the proteins in the illuminated areas.
• This advantage is obtained thanks to the second layer 2 of benzophenone, which is solid (eg pasty or gelled) and in which the concentration of benzophenone is more stable, on the time scale of the illumination, than in a drop of solution benzophenone liquid.
• This solvent may be a deionized water but it has been found that ethanol or isopropanol which are polar solvents are well suited to the invention. A benzophenone soluble in a polar solvent will therefore be particularly suitable for the invention.
• the first release layer rendered adhesive for the proteins
• the first release layer can be brought into contact, according to the patterns, by means of illumination, with a solution of proteins to obtain a printed protein pattern on the first layer, according to the illuminated patterns.
• a non-water soluble benzophenone may also be used if a solvent is found in which no crystallization is observed by drying the layer.
• Benzoin ethyl ether can thus be used using acetone as a solvent.
• the second layer is deposited in a better controlled thickness, in a PVD (physical vapor deposition) frame or by any technique (PVD, CVD, ...) for depositing a layer of transparent (non-crystallized) benzophenone on a substrate, without destroying the nonstick layer.
• PVD physical vapor deposition
• Physical vapor deposition may allow the production of thin layers of benzophenone, very regular thickness and thus inducing less interference during the photo-printing. This deposit mode is therefore particularly interesting.
• This mode is preferred for thin layers less than 1000 nm thick or submicron, which can be difficult to obtain by drying, at least without crystallization, for a particular benzophenone.
• a benzophenone suitable for this type of vapor phase submicron deposition will be, for example, a soluble benzophenone such as sulisobenzone or benzophenone 4 or a benzophenone type (4-benzoylbenzyl) trimethylammonium chloride.
• a soluble benzophenone such as sulisobenzone or benzophenone 4
• a benzophenone type (4-benzoylbenzyl) trimethylammonium chloride.
• any thin film deposition method known from the prior art and compatible with the deposition of a layer of soluble benzophenone, the most regular and controlled thickness before the wavelength of illumination can be used to produce the product of the invention.
• the solvent used for rinsing, ie the dissolution, of the second layer may be arbitrary provided that it is compatible with the substrate and the release layer, in particular the release layer will be insoluble in this solvent and the substrate.
• water will be the preferred solvent for the rinsing operation, the non-stick layers for proteins and the glass generally used as a substrate being water resistant.
• the operation of depositing a solid layer, in particular in the form of a gel increases the concentration of the benzophenone with respect to a liquid and that the photo-printing time, all other things being equal, is shortened. .
• a printing time of a 40 second pattern with a drop of aqueous solution in contact with the first layer a printing time of 0.5 seconds is easily obtained with a second layer obtained by evaporation of the drop. according to the present application.
• the deposition of a benzophenone layer makes it possible to have a better renewal of oxygen at the level of the first layer 3, with a drop of aqueous solution, thicker and therefore less permeable to oxygen than the second layer 2, and improve the homogeneity and instant reproducibility of the photo-printing.
• the deposited layer of benzophenone deposited according to the invention by drying or CVD or PVD is of stable concentration, which improves the long-term reproducibility of the printing of proteins on the release layer of the substrate.
• the benzophenone layer may be deposited in the form of a transparent cluster, without seeking to make it immediately of substantially uniform thickness, for example by depositing a drop of benzophenone solution with a pipette, to obtain a film of typical thickness of 100 microns and variable shape, substantially circular, in particular curved or domed and drying the drop without spreading, thus maintaining the transparency or non-crystallization.
• deposit a drop of solvent on the solid deposit or cluster above to dissolve and re-spread the reformed solution on the first layer 3.
• a non-crystallized layer After evaporation of the solvent, a non-crystallized layer , transparent, reappears.
• a layer of benzophenone, initially spread, deposited according to this third mode it is noted that it is possible later to deposit a drop of solvent on the cluster or the layer, to reconstitute a solution and dry it in the form of a thin layer of uniform thickness of the order, for example of a few microns. It is thus possible to compensate or repair with this method, a spread defect of the thin layer benzophenone gel deforming its surface on the first layer 3 nonstick for proteins.
• this method of compensation or repair by adding a drop of solvent applies to all modes of the invention, i.e. to any layer of benzophenone deposited.
• the invention is susceptible of industrial application or useful in the field of protein printing on a substrate.

Landscapes

• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Organic Chemistry (AREA)
• Immunology (AREA)
• Molecular Biology (AREA)
• Engineering & Computer Science (AREA)
• Biochemistry (AREA)
• General Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Analytical Chemistry (AREA)
• Hematology (AREA)
• Biomedical Technology (AREA)
• Urology & Nephrology (AREA)
• Biophysics (AREA)
• Genetics & Genomics (AREA)
• Proteomics, Peptides & Aminoacids (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Physics & Mathematics (AREA)
• Microbiology (AREA)
• Cell Biology (AREA)
• Food Science & Technology (AREA)
• Physics & Mathematics (AREA)
• Biotechnology (AREA)
• Pathology (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Laminated Bodies (AREA)
• Materials For Photolithography (AREA)
• Peptides Or Proteins (AREA)
• Paints Or Removers (AREA)
• Printing Methods (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=62143395

Family Applications (1)

Country Status (6)

Family Cites Families (6)

• 2018
  • 2018-03-20 FR FR1852391A patent/FR3079233B1/fr active Active
• 2019
  • 2019-03-19 WO PCT/EP2019/056849 patent/WO2019180025A1/fr unknown
  • 2019-03-19 US US16/982,306 patent/US20210060515A1/en not_active Abandoned
  • 2019-03-19 JP JP2020551291A patent/JP7321181B2/ja active Active
  • 2019-03-19 EP EP19716080.7A patent/EP3768788A1/fr not_active Withdrawn
  • 2019-03-19 CN CN201980034123.8A patent/CN112534012A/zh active Pending

Also Published As

Similar Documents

Legal Events