EP4340996A1 - Puce microfluidique pour attirer et piéger un élément biologique spécifique - Google Patents
Puce microfluidique pour attirer et piéger un élément biologique spécifiqueInfo
- Publication number
- EP4340996A1 EP4340996A1 EP22731739.3A EP22731739A EP4340996A1 EP 4340996 A1 EP4340996 A1 EP 4340996A1 EP 22731739 A EP22731739 A EP 22731739A EP 4340996 A1 EP4340996 A1 EP 4340996A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reservoir
- chip
- microfluidic chip
- biological element
- microchannels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/502753—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by bulk separation arrangements on lab-on-a-chip devices, e.g. for filtration or centrifugation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/02—General characteristics of the apparatus characterised by a particular materials
- A61M2205/0244—Micromachined materials, e.g. made from silicon wafers, microelectromechanical systems [MEMS] or comprising nanotechnology
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/04—General characteristics of the apparatus implanted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/08—Regulating or influencing the flow resistance
- B01L2400/084—Passive control of flow resistance
- B01L2400/086—Passive control of flow resistance using baffles or other fixed flow obstructions
Definitions
- the present application relates to the field of microfluidic devices capable of attracting and trapping a specific biological element. More specifically, the present application relates to a microfluidic chip capable of attracting and trapping in vivo a specific biological element, such as a prokaryotic or eukaryotic cell.
- cancers There are different types of cancers depending on the tissue in which they develop. A distinction can thus be made between solid tumours, which are characterized by a localized cluster of cancer cells, and blood cell tumours, which are diffuse and whose cancer cells circulate in the bone marrow or blood. Blood cell tumors also called hematopoietic cancers are cancers affecting the blood or lymphoid organs, such as leukemias and lymphomas.
- carcinomas As regards solid tumours, a distinction is made between carcinomas and adenocarcinomas, cancers arising from epithelial tissue. There are also sarcomas which correspond to cancerous cells appearing in a so-called support tissue. We then speak of osteosarcoma for the bones, liposarcoma for the fat or even myosarcoma for the muscles.
- surgery is one of the main treatments for a solid tumor and corresponds to the resection of the entire tumor when possible and possibly of the tissues located around the tumor called the resection margin.
- Surgery can be used as a single treatment when the tumor is very localized, especially when the tumor is at an early stage, but it is often associated with other treatments such as radiotherapy which is also a local treatment. and/or medical treatments such as chemotherapy which is a systemic treatment potentially acting on all cancerous cells in the body.
- the advantage of local surgery for the treatment of a solid tumor is the possibility of removing the entire tumor when possible and of preserving the organs and anatomical structures not affected by the cancerous cells. It also makes it possible to limit the side effects attributed to radiotherapy treatment such as burns, or the generation of radiation-induced cancers, and to chemotherapy such as skin reactions, nausea, vomiting, diarrhea, muscle pain, fatigue, falls. hair and chemotherapy-induced cancers.
- the resection area includes an area of healthy tissue present around the tumor, which corresponds to the resection margin.
- the tumor cells of the primary tumor are included in the resection area and there will be no recurrence.
- some tumor cells are localized beyond the resection area either locally or remotely and then a recurrence is possible either locally or remotely to form metastases, i.e. secondary colonies of cancerous cells which spread far from the organ affected by the initial tumor and which are at the origin of a so-called “metastatic” cancer in an organ other than that in which the solid tumor was located.
- Chemotherapy can be used after local surgery aimed at resection of the tumour, it is called “adjuvant chemotherapy” in order to prevent recurrence and/or the formation of metastatic cancer.
- adjuvant chemotherapy many side effects are caused by this drug treatment.
- Microfluidic devices have been described in the prior art for their use in the field of cancer treatment. Reference may in particular be made to document WO2018/089989 Al which describes an ex vivo device for the treatment of cancer by subjecting a biological fluid such as blood with electromagnetic radiation specific to the type of targeted cancer cell and capable of destroying it.
- No document of the prior art describes or suggests a microfluidic chip for attracting and destroying, preferably in vivo, a biological element and in particular a cancerous cell after the resection of a solid tumor and thus preventing and/or reducing the risks of local recurrence and/or development of metastatic cancer, the manufacture of which is simple and inexpensive, which is effective and which is easy to implement in vivo for a clinical application.
- the present invention proposes a microfluidic chip capable of attracting, trapping and ultimately destroying a specific biological element
- a reservoir consisting of a matrix comprising a chemoattractant compound capable of attracting the biological element, at least one network of microchannels arranged between the reservoir and the external medium of the chip and allowing the chemoattractant compound to pass towards the said medium and to allow the biological element present in the said medium to pass in the direction of the reservoir
- each microchannel is in the form of a harpoon comprising at least two arrows spaced longitudinally from each other and directed towards the tank, in which each arrow comprises two branches each having a free end forming an acute angle of between 10° and 80°, and wherein each arrow comprises two openings communicating with a longitudinal part of the microchannel and having a e width between 5 ⁇ m and 30 ⁇ m.
- the present invention relates to a microfluidic chip capable of attracting and trapping a specific biological element, said chip comprising:
- a reservoir (1) consisting of a matrix comprising a chemoattractant compound capable of attracting the biological element
- each microchannel is in the form of a harpoon comprising at least two arrows spaced longitudinally from each other and directed towards the tank, in which each arrow comprises two branches each having a free end forming an acute angle comprised between 10° and 80°, and in which each arrow comprises two openings communicating with a longitudinal part of the microchannel and having a width comprised between 5 ⁇ m and 30 ⁇ m.
- Figure 1 shows a network of microchannels (2) forming part of the chip according to the invention.
- FIG. 2 shows an electron microscope view (X414 magnification) of a network of microchannels (2) forming part of the chip according to the invention. A distinction is made between the cells (15) trapped within the chip and the cells (16) present within the external medium.
- Figure 3 is a sectional view of the chip according to the invention.
- Figure 4 shows the upper part (9) of the chip seen from above.
- Figure 5 shows the lower part (8) of the chip seen from above.
- Figure 6 shows an exploded view of the underside of the chip according to the invention.
- FIG. 7 represents an exploded top view of the chip according to the invention.
- FIG. 8 represents a cross-sectional view of the chip according to the invention on a scale of 5:0.5 cm.
- Figure 9 shows a cross-sectional view of the chip at 5:1 cm scale.
- the Applicants have developed a microfluidic chip to attract and trap a biological element, such as a prokaryotic or eukaryotic cell.
- This microfluidic chip is particularly interesting for attracting and trapping a cancerous cell in vivo after the resection of a solid tumor in order to prevent and/or reduce the risks of local recurrence and/or the development of metastatic cancer.
- the microfluidic chip developed by the Applicants is particularly advantageous because it makes it possible to attract, trap and ultimately destroy a biological element without requiring the use of one or more electrodes.
- the absence of an electrode makes it possible in particular to manufacture the microfluidic chip more easily, to limit the production costs but also to facilitate the implementation of the microfluidic chip in vivo.
- the particular structure of the microchannels implemented in the chip according to the invention allows the passage of a biological element within said chip, from the external medium in the direction of the reservoir consisting of a matrix comprising a chemoattractant compound capable of attracting the biological element, while preventing said biological element from coming out of the chip towards the external environment.
- the chip according to the present invention not only makes it possible to attract a biological element present in the medium outside of the chip but also to trap it within said chip and ultimately to destroy it since the biological element deprived of the resources necessary for its survival ends up being destroyed.
- a "microfluidic chip” is a device comprising a network of microchannels, i.e. channels of micrometric size, etched or molded in a material, connected to each other and connecting the inside of the chip to the outside of the chip by drilled inputs and outputs through the chip, to achieve a desired function.
- the microfluidic chip can be obtained by specific processes such as by deposition and electrodeposition, etching, bonding, injection molding, embossing, soft lithography, anodic welding, or any other technology. These manufacturing methods are known to those skilled in the art.
- the desired function of the microfluidic chip is to be able to attract in vivo a specific biological element, preferably a eukaryotic cell in particular a cancerous cell, and to destroy it in vivo.
- microchannel network corresponds to a multitude of channels, connected on the outside of the chip by inputs and outputs drilled through the chip.
- the microchannels can for example be made from a mold, or directly in the material of the microfluidic chip.
- the number of microchannels varies according to the diameter of the chip, the width of the microchannels or even the spacing between said microchannels.
- Each microchannel making up the network of microchannels corresponds to a passage whose height can be from a few micrometers to a few hundred micrometers with a length from a few hundred micrometers up to a few millimeters.
- the width of a microchannel corresponds to the horizontal distance of the two points which are on the opposite edges of the cross section and which are furthest from each other.
- the height of a microchannel corresponds to the vertical distance of the points located on opposite edges of the cross section and furthest apart from each other.
- the length of a microchannel is the distance between the two ends of said channel, the length of a microchannel corresponds to the largest dimension.
- the two shorter dimensions generally define the aforementioned cross-section.
- the microfluidic chip is preferably “intended to be implanted in vivo”, ie the microfluidic chip is intended and able to be implanted within a living being, preferably a mammal and in particular a human being. More particularly, this means that the chip can be implanted in a living being without interfering with or degrading the tissues with which it is in contact and that said chip is capable of functioning in vivo, that is to say attracting, trapping and destroying a specific biological element in vivo, preferably a eukaryotic cell such as a cancer cell, and to destroy it in vivo.
- biological element within the meaning of the present invention, reference is made to any element comprising genetic information in the form of RNA or DNA and likely to be found within a living organism, i.e. say in vivo, such as prokaryotic cells, eukaryotic cells and microorganisms.
- prokaryotic cells such as a bacterium
- eukaryotic cell such as an animal cell.
- specific biological element or "target biological element” refers to the biological element of interest in the context of the use of the chip, that is to say the biological element that one wishes to attract and destroy in vivo.
- the chemoattractant compound present in the reservoir being chosen to attract the biological element of interest in the context of the use of the microfluidic chip.
- the biological element of interest is a prokaryotic or eukaryotic cell, more preferably the biological element of interest is a eukaryotic cell. Even more preferably, the eukaryotic cell is a cancer cell, preferably a metastatic cancer cell.
- a “cancer cell” is a cell in which one or more major DNA lesions have occurred, thus transforming the normal cell into a cancerous cell capable of proliferating to form a group of identical transformed cells, i.e. a tumor.
- cancer cell refers to a cell derived from a so-called initial or original or primary solid tumor, present at or near the area of resection of the tumor. solid.
- cancer cell to a “metastatic cancer cell”, that is to say a cancer cell, capable of or having migrated through the body via the blood vessels. or lymphatics from the original tumor and capable of or having colonized one or more other tissues close to or at a distance from said tumor, thus forming metastases, at the origin of “metastatic cancers” or even “metastatic tumors”.
- the cancerous cell is a cell resulting from a so-called secondary or tertiary solid tumour, which correspond to metastatic tumors in a second or third tissue or organ other than that of the initial tumour.
- the microfluidic chip according to the present invention is capable of attracting and destroying several of said elements and cells in vivo. It is also worth noting that the chip microfluidics according to the present invention is capable of attracting and destroying in vivo several specific biological elements which may be of different nature, said elements being attracted within the chip by the specific choice of the chemoattractant compound(s) present in the reservoir.
- the term “prevent” designates a reduction in the risk of acquiring a specified disease or disorder, the reduction or slowing of the appearance of the symptoms of this disease.
- the term “prevent” may correspond to the reduction in the risk of spreading an infection when the biological element is a prokaryotic cell or to the reduction in the risk of local recurrence of the cancer and/ or the risk of appearance of metastases, more precisely of metastatic cancers when the biological element is a eukaryotic cell of the cancerous type.
- the term “treat” means an amelioration or reversal of a specified disease or disorder or at least one discernible symptom.
- the term “treating” may also refer to reducing or slowing the progression of the disease or disorder, or the onset of symptoms of that disease or disorder.
- the term “treating” may correspond to the reduction or slowing down of the progression of an infection when the biological element is a prokaryotic cell or to the reduction or slowing down of the appearance of metastases, more precisely of metastatic cancers when the biological element is a eukaryotic cell of the cancerous type.
- the microfluidic chip is preferably intended to be implanted in vivo in a subject.
- the subject in the context of the present invention is a living being, preferably a mammal and more particularly human beings, children, men or women.
- solid cancer or “solid tumor” we refer to an individualized mass of cancerous cells in any tissue such as the skin, mucous membranes, bones, or any other tissue present in the organs, that is i.e. carcinomas or endocarcinomas arising from epithelial cells such as skin, mucous membranes, glands and sarcomas arising from connective and supporting tissue cells such as bone, cartilage.
- solid cancer or “solid tumor” refers to a carcinoma such as cancer of the breast, lungs, prostate, bladder, salivary glands, skin, intestine, colon-rectum, thyroid, cervix, endometrium and ovaries, lip-mouth-larynx cancer, kidney, liver, brain, testicles , pancreas, preferentially breast cancer.
- solid tumors not being limiting.
- chemoattractant compound refers to any compound capable of attracting a biological element by chemotaxis, preferably a cell expressing specific membrane receptors for this compound on its surface, said biological element moving according to the gradient of concentration of chemoattractant compound.
- the chemoattractant compound is able to induce the displacement of one or more specific biological elements according to the concentration gradient of said compound by positive chemotaxis, the biological element moving towards the region where the concentration in chemoattractant compound is the highest.
- the chemoattractant compound is said to be "capable of attracting" a specific biological element when it allows said element to move inside the microfluidic chip and in particular towards the reservoir of chemoattractant compound in which is the highest concentration of chemoattractant compound.
- a person skilled in the art will know how to characterize the specific biological element of interest in order to choose the chemoattractant compound capable of attracting said element within the chip.
- the chemoattractant compound is chosen according to the specific biological element of interest.
- the chemoattractant compound is chosen according to the type of membrane receptors that this cell expresses.
- the chemoattractant compound can be a cytokine, that is to say a polypeptide or a soluble protein synthesized by a cell and acting remotely on other cells to regulate the activity and function via membrane receptors, selected from chemokines, granulocyte and macrophage colony stimulating factors such as M-CSF, G-CSF, CSF-1, growth factors and transforming growth factors such as TGF alpha, TGF beta, EGF, betacellulin, amphiregulin, heregulin, HBEGF, FGF, VEGF, tumor necrosis factors such as NGF, TNF alpha, TNF beta, interferons such as IFN alpha, IFN beta, IFN gamma, IFN lambda and interleukins such as IL-1 to IL-38.
- chemokines granulocyte and macrophage colony stimulating factors such as M-CSF, G-CSF, CSF-1
- growth factors and transforming growth factors such as TGF alpha, TGF beta, E
- the chemoattractant compound is chosen from chemokines, growth factors and transformation growth factors.
- a chemokine is a small protein of 8 to 14 kilo daltons characterized by the presence of four cysteine residues in conserved positions allowing the formation of their three-dimensional structure. Chemokines can be classified into four subfamilies according to the spacing between two of their cysteines in the N-terminal position, one can in particular refer to the CXC or alpha family, that is to say whose first two cysteines are separated by any amino acid, the CC or beta family, the CX3C or delta family, the C or gamma family.
- the chemokine in the context of the present invention can for example be chosen from the following chemokines: CXCL12, also called stromal cell-derived factor 1 (SDF-1), CCL5, CCL2, CCL3, CCL7, CCL19, CCL21, CCL22, CCL25 , CXCL1, CXCL5, CXCL6, CXCL8, CX3CL1.
- a growth factor is a low molecular weight protein (less than 30 kilo daltons) which stimulates cell multiplication and is recognized by specific membrane receptors which are most often tyrosine kinases.
- the growth factor in the context of the present invention may for example be chosen from TGF alpha or beta (transforming growth factor alpha or beta), FGF (fibroblast growth factor alpha), EGF (epidermal growth factor), betacellulin amphiregulin, heregulin, HBEGF, VEGF (vascular endothelial growth factor), PDGF (platelet-derived growth factor).
- TGF alpha or beta transforming growth factor alpha or beta
- FGF fibroblast growth factor alpha
- EGF epidermal growth factor
- betacellulin amphiregulin heregulin
- HBEGF vascular endothelial growth factor
- VEGF vascular endothelial growth factor
- PDGF platelet-derived growth factor
- the chemoattractant compound can be a peptide carrying a formyl N group such as N-formylmethionyl-leucyl-phenylalanine (FMLP) or carbohydrate molecules such as glucose .
- FMLP N-formylmethionyl-leucyl-phenylalanine
- the chemoattractant compound is included in a matrix which is composed of a biocompatible material as defined in the present invention.
- the biocompatible material of the matrix being chosen specifically according to the chemoattractant compound, the desired release profile as well as the context of use of the microfluidic chip.
- external environment in the context of the present invention, reference is made to the tissues located around the microfluidic chip when the latter is implanted in vivo, more precisely to the tissues located directly in contact with the chip, up to 300 mm, preferably up to 150 mm, more preferably up to 100 mm around the chip.
- resection of a solid tumour is meant the removal, ablation or even excision of a solid tumour, for example by surgery.
- the present invention relates to a microfluidic chip capable of attracting and trapping a specific biological element in vivo.
- the chip according to the invention allows passive destruction of the biological element trapped within the chip which, without the conditions necessary for its survival, ends up being destroyed.
- a first object of the invention relates to a microfluidic chip capable of attracting and trapping a specific biological element, said chip comprising:
- a reservoir (1) consisting of a matrix comprising a chemoattractant compound capable of attracting the biological element
- each microchannel is in the form of a harpoon comprising at least two arrows (4) spaced longitudinally from each other and directed towards the tank, in which each arrow comprises two branches (5) each having a free end (6) forming an acute angle comprised between 10° and 80°, and in which each arrow comprises two openings (7) communicating with a longitudinal part of the microchannel and having a width comprised between 5 p.m. and 30 p.m.
- the present invention relates to a microfluidic chip intended to be implanted in vivo to attract and trap in order to ultimately destroy a specific biological element, preferably a eukaryotic cell, and more preferably a cancerous cell
- the matrix of the reservoir comprising the chemoattractant compound is formed from a biocompatible material.
- the chemoattractant compound included in the matrix of the reservoir makes it possible to attract in vivo the specific biological element within the chip by positive chemotaxis, the biological element migrating in the direction of the reservoir where the concentration of chemoattractant compound is the highest.
- the network of microchannels it allows the passage by diffusion of the chemoattractant compound from the reservoir to the external environment of the chip as well as the passage of the specific biological element from the external environment of the chip to the interior of the chip. , towards the tank.
- each microchannel making up the network of microchannels that is to say in the form of a harpoon comprising at least two arrows spaced longitudinally from each other and directed towards the reservoir, with each arrow comprising two branches each having a free end forming an acute angle of between 10° and 80°, and with each arrow comprising two openings communicating with a longitudinal part of the microchannel and having a width of between 5 ⁇ m and 30 ⁇ m, allows the passage of the biological element from the external environment within the microfluidic chip towards the reservoir while preventing the passage of the biological element present in said chip towards the external environment.
- the network of microchannels implemented in the chip according to the invention advantageously makes it possible to trap the biological element present in the chip but also to destroy it passively since said element trapped within the chip does not have the necessary conditions to his survival.
- the biological element attracted and trapped in the microfluidic chip is a prokaryotic or eukaryotic cell
- the cell in the absence of the conditions necessary for its survival, the cell will be destroyed, in particular by apoptosis after a few hours to a few days. .
- the cellular debris or apoptotic bodies emerge from the chip via the network of microchannels and are rejected into the external environment.
- the microfluidic chip allows passive destruction of the biological element not requiring the implementation of one or more electrodes and requiring no energy consumption.
- the operating capacity of the chip is continuously renewed thanks to the passive destruction of the biological element trapped within the chip and also thanks to its passive rejection towards the external environment.
- the dimensions and the geometry of the microchannels implemented in the chip according to the invention are particularly suitable for allowing the movement of eukaryotic cells which need a support to migrate in particular by projecting their membranes towards forward and forming an actin-rich structure called lamellipodia.
- the dimensions and the geometry of the microchannels implemented in the chip according to the invention advantageously participate in the release profile of the chemoattractant compound towards the external environment, in particular by creating a hydrodynamic resistance which limits the diffusion of the chemoattractant compound towards the outside. and contributes to the creation and maintenance of a chemoattractant compound gradient.
- the dimensions and the geometry of the microchannels implemented in the chip according to the invention make it possible to ensure the unidirectional passage of a specific biological element within the chip from the external environment towards the reservoir of chemoattractant compound, allowing thereby trapping the element within the chip.
- each microchannel comprises between 2 and 6 arrows, preferably between 3 and 5 arrows and even more preferably 3 arrows.
- each free end of an arrow forms an angle of between 10° and 60°, preferably between 10° and 45°, more preferably between 10° and 30°, more preferably an angle of 20°.
- the two openings present on each arrow and communicating with the longitudinal part of the microchannel have a width of between 10 ⁇ m and 20 ⁇ m, preferably between 10 ⁇ m and 15 ⁇ m, even more preferably 10 ⁇ m.
- the two openings present on each arrow and communicating with the longitudinal part of the microchannel have a width of less than 10 ⁇ m.
- This embodiment advantageously makes it possible to improve the ability of the chip to specifically target and attract cancerous cells which are the only eukaryotic cells able to invaginate so as to be able to pass said openings.
- the two openings present on each arrow are located on the longitudinal axis of the microchannel and communicate with the longitudinal part of said microchannel.
- each arrow comprises a first so-called “entrance” opening arranged at the entrance of the arrow and through which the biological element enters and a second so-called “exit” opening through which the biological element leaves in the direction of the reservoir comprising the chemoattractant compound.
- the present invention relates to a microfluidic chip in which each arrow (4) comprises a first opening through which the biological element enters and a second opening through which the biological element exits in the direction of the reservoir comprising the chemoattractant compound.
- each of the branches of the same arrow is symmetrical to the other branch along the longitudinal axis of the microchannel.
- the present invention relates to a microfluidic chip according to the first object, in which the free end (6) of each branch (5) is separated from the other by a distance of between 30 and 200 ⁇ m.
- the free end (6) of each branch (5) is separated from the other by a distance of between 50 and 100 ⁇ m, more preferably by a distance of between 50 and 70 ⁇ m.
- the present invention relates to a microfluidic chip in which each arrow (4) is spaced longitudinally from the next by a distance of between 10 and 100 ⁇ m, preferably between 10 and 30 ⁇ m.
- each arrow (4) comprises a first opening through which the biological element enters and a second opening through which the biological element exits in the direction of the reservoir (1) and in which the second opening of an arrow is spaced longitudinally from the first opening of the next arrow by a distance of between 10 and 100 ⁇ m, preferably between 10 and 30 ⁇ m.
- the length formed by all of the arrows included on the same microchannel and the longitudinal space between each of them is between 100 ⁇ m and 500 ⁇ m, preferably between 200 ⁇ m and 250 ⁇ m.
- each arrow (4) has a length of between 50 and 200 ⁇ m, preferably 50 ⁇ m, a height of between 10 and 50 ⁇ m, preferably 10 ⁇ m and a distance between each free end (6) of each branch (5) of between 30 and 200 ⁇ m, preferably 50 ⁇ m.
- each arrow (4) has a length of 50 ⁇ m, a height of 10 ⁇ m and a distance between each free end (6) of each branch (5) of 50 ⁇ m.
- all the arrows present on the same microchannel have the same dimensions.
- each microchannel has a length of between 100 and 500 ⁇ m, preferably between 200 and 300 ⁇ m, a width of between 30 and 200 ⁇ m, preferably between 50 and 100 ⁇ m , a height of between 5 and 50 ⁇ m, preferably between 20 and 30 ⁇ m
- each microchannel included in a network of microchannels is separated from the directly adjacent microchannel by a distance of between 50 and 400 ⁇ m, preferably between 100 and 200 ⁇ m.
- microchannels making up the network of microchannels of the microfluidic chip according to the present invention can be of parallelepiped, cylindrical, cobblestone, frustoconical shape or a mixture of these shapes.
- all the microchannels included in a network of microchannels have the same shape and the same dimensions.
- each microchannel comprises 3 arrows, of which each free end (6) of an arrow (4) forms an angle of 20° and of which the two openings (7) present on each arrow present a width of between 10 ⁇ m and 20 ⁇ m.
- the free end (6) of each branch (5) is separated from the other by a distance of between 50 and 100 ⁇ m.
- each arrow (4) has a length of 50 ⁇ m, a height of 10 ⁇ m and a distance between each free end (6) of each branch (5) of 50 ⁇ m.
- each arrow is separated longitudinally from the next by a distance of between 10 and 30 ⁇ m.
- each microchannel has a length of between 100 and 500 ⁇ m, a width of between 30 and 200 ⁇ m, a height of 10 ⁇ m.
- the present invention relates to a microfluidic chip in which said chip has no electrode between the reservoir (1) and the network of microchannels (2).
- the absence of an electrode allows easier manufacture and implementation of the chip and also makes it possible to have a chip making it possible to attract, trap and ultimately destroy a biological element passively. specific.
- the biological element is preferably a cancerous cell and in particular a cancerous cell originating from a cancer or from a solid tumour.
- the migration of this cell inside the chip takes place by adhesion to the support on which the microchannel network is located.
- the network of microchannels of the microfluidic chip according to the present invention is located on the outer edge of said chip, that is to say in contact with the external environment, thus ensuring communication between said environment and the interior space of the chip.
- the chip according to the present invention can comprise several networks of microchannels, for example two networks of microchannels.
- the microfluidic chip according to the first object of the invention comprises a lower part (8) and an upper part (9), the reservoir (1) comprising the matrix of chemoattractant compound and the network of microchannels (2) which can be understood independently from each other in the upper part (9) and/or the lower part (8) of said chip.
- the microfluidic chip according to the first object of the invention comprises a lower part (8) comprising part of the reservoir (1), the network of microchannels (2) and an upper part (9) comprising a part of the tank (1) and able to be arranged on the lower part (8), the said parts being fixed together.
- the microfluidic chip according to the present invention comprises a lower part (8) comprising part of the reservoir (1), and an upper part (9) comprising part of the reservoir (1) and the network of microchannels (2), said upper part being able to be arranged on the lower part (8), said parts being fixed to each other.
- the upper part of the microfluidic chip is able to be placed on the lower part to form a cover, said parts being fixed together.
- the reservoir comprised in the lower part and in the upper part corresponds to one and the same reservoir, part of which is located in the upper part of the chip and the other part is located in the lower part of the chip.
- the term "upper part suitable for being placed on the lower part to form a lid” means the fact that the shape of the upper part is such that it adapts to that of the lower part. on which it rests without hindering the functionality of each element making up the lower part and makes it possible to form a cover closing the chip.
- the upper and lower part of the microfluidic chip are rounded so that the chip can be implanted in vivo without damaging the tissues.
- the chip is of rounded shape, with for example the upper and lower part having a half-oval or half-sphere shape so that when the upper part is placed on the lower part, the microfluidic chip is respectively of oval or spherical.
- the size of the microfluidic chip according to the first object is suitable for implantation in vivo and is of the order of a few centimeters, preferably between 0.5 and 5 cm, more preferably between 1 and 3 cm, even more preferably of 1 cm. More particularly, the present invention relates to a microfluidic chip in which the reservoir (1) and the network of microchannels (2) are annular in shape and in which the reservoir is located at the center of the chip.
- the ring shape corresponds to a ring shape.
- This particular configuration makes it possible in particular to ensure a radial diffusion of the chemoattractant compound included in the reservoir towards the external environment and a homogeneous attraction of the biological element from said environment towards the reservoir, thanks to the central location of the reservoir as well as 'to the annular shape of the network of microchannels.
- the lower part and the upper part of the microfluidic chip can be attached to each other by any physical or chemical means, suitable for in vivo use.
- physical or chemical fixing means reference may be made respectively to a screw or to an adhesive suitable for in vivo use on the chip or even to a protruding element coming opposite a hollow element present in the lower and upper part to put them together.
- the upper part comprises one or more openings through which one or more screws can be inserted and the lower part comprises one or more nuts adapted to receive said screw or screws.
- the upper part of the microfluidic chip according to the invention comprises a central opening through which a screw (17) can be inserted and the lower part comprises a central nut able to receive said screw.
- the annular reservoir is arranged around the central opening present on the upper part and the central nut present on the lower part of the chip.
- the microfluidic chip comprises one or more seals (10) capable of sealing the chip, said seals being arranged between the lower part and the upper part above the network of microchannels.
- seal capable of sealing the chip is understood here to mean the property of the seal not to allow any fluids that may be present in the external environment, such as blood, to enter within said chip and not to let it escape into the environment. outside the liquids and materials present inside said chip by a place other than by the network of microchannels.
- the position of said joint(s) above the network of microchannels making it possible not to hinder the diffusion of the chemoattractant compound towards the external medium nor the passage of the specific cell present in said medium within the chip, in the direction of the reservoir.
- the seals make it possible to create a support zone between the upper and lower part of the chip.
- the present invention relates to a microfluidic chip in which the upper part (9) and/or the lower part (8) comprise an annular cavity i) (8) capable of receiving the matrix comprising the chemoattractant compound, and an annular cavity ii) (10) arranged between the reservoir (1) and the network of microchannels (2), able to receive a liquid in which the chemoattractant compound is able to diffuse.
- the present invention relates to a microfluidic chip in which the upper part (6) and/or the lower part (5) comprise an annular cavity i) (11) capable of receiving the matrix comprising the chemoattractant compound via one or more openings (12) communicating with the external environment (3) and opening into said cavity, and an annular cavity ii) (13) arranged between the reservoir (1) and the network of microchannels (2), capable of receiving a liquid in which the chemoattractant compound is capable of diffusing, via one or more openings (14) communicating with the external medium (3) and opening into said cavity.
- the present invention relates to a microfluidic chip in which the upper part (9) and the lower part (8) comprise an annular cavity i) (11) able to receive the matrix comprising the chemoattractant compound via one or more openings (12) communicating with the external environment (3) and opening into said cavity, and an annular cavity ii) (13) arranged between the reservoir (1) and the network of microchannels (2), capable of receiving a liquid in which the chemoattractant compound is capable of diffusing, via one or more openings (14) communicating with the external environment (3) and opening into said cavity.
- the chemoattractant compound is added to the reservoir matrix before it is added to the annular cavity i).
- the chemoattractant compound can be added to the annular cavity i) before or after the addition to this same cavity of the matrix forming the reservoir.
- the matrix comprising the chemoattractant compound and the liquid in which the chemoattractant compound is capable of diffusing are added respectively to the annular cavity i) and to the annular cavity ii) via said openings (12, 14) preferably after the upper part was arranged on the lower part.
- the liquid in which the chemoattractant compound is capable of diffusing is preferably an aqueous solution such as physiological serum or a physiological buffer solution such as an aqueous solution comprising a phosphate buffered saline (PBS).
- a aqueous solution such as physiological serum
- a physiological buffer solution such as an aqueous solution comprising a phosphate buffered saline (PBS).
- PBS phosphate buffered saline
- the annular cavity i) is included in the upper part and the lower part of the chip, the opening or openings opening into this cavity being in the lower part of the chip, and the annular cavity ii) as well as the the openings opening into this cavity are included in the upper part of the chip.
- the chip according to the present invention is made of biocompatible material.
- the present invention relates to a microfluidic chip in which the upper part, the lower part and the matrix comprising the chemoattractant compound are composed of a biocompatible material.
- the upper part and the lower part as such as well as the elements which they comprise are made of a biocompatible material. More precisely still, the upper part, the lower part, the reservoir, in particular the matrix comprising the chemoattractant compound, the network of microchannels, and the gaskets are made of a biocompatible material.
- biocompatible material or “biomaterial” we refer to a material having the ability not to interfere, not to degrade the biological environment in which it is used, even in direct or indirect, brief or prolonged contact with the internal tissues and fluids of the body of a human or animal.
- biocompatible material that can be used in the context of the present invention, reference may be made in a non-exhaustive manner to glass, to ceramics such as alumina, zirconia, hydroxyapatite, to metals and metal alloys such as titanium, platinum, polymers of natural origin such as collagen, agarose, chitosan, carrageenan, xanthan and alginate or degradable synthetics such as polyesters and polyanhydrides or non-degradable such as polyurethanes , cellulose and its derivatives, vinyl polymers.
- the polymers of synthetic origin are PEEK (polyetheretherketone) or PDMS (polydimethylsiloxane).
- the upper part, the lower part and the network of microchannels are independently of one another, made of polymers of synthetic origin such as polydimethylsiloxane (PDMS) or polyetheretherketone (PEEK). More preferably, the upper part and the lower part are made of polyetheretherketone (PEEK).
- PDMS polydimethylsiloxane
- PEEK polyetheretherketone
- the network of microchannels is made of polyetheretherketone (PEEK).
- PEEK polyetheretherketone
- the reservoir and in particular the matrix comprising the chemoattractant compound is made of collagen and/or alginate, more preferably said reservoir, in particular said matrix, is made of alginate.
- the upper part, the lower part and the network of microchannels of the chip according to the invention are made of polyetheretherketone (PEEK), the reservoir of chemoattractant compound is made of alginate.
- PEEK polyetheretherketone
- the present invention relates to a microfluidic chip in which the matrix comprising the chemoattractant compound is composed of a biocompatible material, preferably a crosslinked polymer.
- the crosslinked polymer making up the matrix is a polymer of natural origin and in particular collagen and/or alginate, preferably alginate.
- the crosslinking of a polymer corresponds to the formation of one or more three-dimensional networks from linear or branched polymers, by chemical and/or physical means.
- a person skilled in the art knows how to induce crosslinking of the polymers according to the polymers considered, for example the crosslinking can be carried out by heating and/or by the use of a crosslinking agent.
- a so-called “cross-linked” polymer is a polymer in which some of its chains are interconnected by strong or weak bonds.
- collagen can be cross-linked by the use of cross-linking agents such as ammonia gas, oxidized sugars or aldehydes at room temperature and alginate can be cross-linked in a calcium chloride bath at ambient temperature.
- cross-linking agents such as ammonia gas, oxidized sugars or aldehydes at room temperature
- alginate can be cross-linked in a calcium chloride bath at ambient temperature.
- the biocompatible material making up the matrix comprising the chemoattractant compound is crosslinked alginate in a bath of calcium chloride, preferably at room temperature.
- the crosslinking of the biocompatible material making up the matrix comprising the chemoattractant compound advantageously allows prolonged release of this compound.
- sustained release refers to controlled and continuous release kinetics of the chemoattractant compound over a period of time.
- the release of the chemoattractant compound takes place between 3 days and 6 months, preferably between 15 days and 3 months.
- the present invention relates to a microfluidic chip in which the mass percentage of chemoattractant compound/reservoir matrix (1) is between 0.1 and 20%, preferably between 0.5 and 10% and more preferably between 0.5 and 5%.
- a person skilled in the art will know how to determine the content of the chemoattractant compound in the reservoir depending on the context of use of the chip, the specific biological element of interest, the duration of release of the desired chemoattractant compound and the biomaterial making up the chip. reservoir matrix.
- the chemoattractant compound included in the reservoir of the microfluidic chip and in particular in the matrix of the reservoir is preferably chosen from chemokines such as CXCL12, also called stromal cell-derived factor 1 (SDF-1), CCL5, CCL2, CCL3, CCL7, CCL19, CCL21, CCL22, CCL25, CXCL1, CXCL5, CXCL6, CXCL8, CX3CL1, growth factors and transformation growth factors such as TGF alpha or beta (transforming growth factor alpha or beta), FGF (fibroblast growth factor alpha), EGF (epidermal growth factor alpha), betacellulin, amphiregulin, heregulin, HBEGF, PDGF (factor growth factor-derivative), VEGF (vascular endothelial growth factor).
- CXCL12 also called stromal cell-derived factor 1 (SDF-1)
- CCL5 stromal cell-derived factor 1
- CCL5 stromal cell-derived factor 1
- CCL5 stromal cell
- the present invention relates to a microfluidic chip in which the chemoattractant compound included in the reservoir of the chip is chosen from at least one of following compounds: CXCL12, CCL5, CCL2, CCL3, CCL7, CCL19, CCL21, CCL22, CCL25, CXCL1, CXCL5, CXCL6, CXCL8, CX3CL1, TGF alpha, TGF beta, FGF, PDGF, EGF, VEGF.
- the chemoattractant compound included in the reservoir of the chip is chosen from at least one of following compounds: CXCL12, CCL5, CCL2, CCL3, CCL7, CCL19, CCL21, CCL22, CCL25, CXCL1, CXCL5, CXCL6, CXCL8, CX3CL1, TGF alpha, TGF beta, FGF, PDGF, EGF, VEGF.
- the chemoattractant included in the reservoir of the microfluidic chip and in particular in the matrix of the reservoir is preferably chosen from carbohydrate molecules.
- the chemoattractant compound can be used alone or in combination with one or more other chemoattractant compounds mentioned above and / or with other compounds capable of directly or indirectly improving the ability of said chemoattractant compound to attract a specific biological element, such as a cell eukaryote and in particular a cancer cell such as carbohydrate molecules (glucose) and / or lipid molecules (fatty acids) which provide the necessary energy (energy provided in the form of ATP after degradation of glucose or fatty acids) to the survival of the biological element, in particular of a eukaryotic cell and in particular of a cancerous cell.
- Other molecules such as oxygen can be used in combination with chemoattractants.
- Oxygen can be transported by hemoglobin or by synthetic hemoglobins. Oxygen is an essential molecule for the survival and proliferation of cells, especially cancer cells.
- the chemoattractant compound is used in combination with one or more carbohydrate (glucose) and/or lipid (fatty acid) molecules.
- chemoattractant compound(s) A person skilled in the art will take care to choose the chemoattractant compound(s) according to the specific biological element targeted.
- the biological element is a eukaryotic cell
- an analysis of the membrane receptors expressed by the targeted cell must be carried out upstream in order to ensure the specificity of the chemoattractant compound(s) chosen.
- the specific biological element is a cancer cell expressing the transmembrane receptor CXCR4 such as for example a breast cancer cell, in particular a human breast cancer cell
- the chemoattractant compound chosen is stromal cell-derived factor 1 (SDF-1).
- the chosen chemoattractant compound is epidermal growth factor (EGF) or transforming growth factor alpha (TGF alpha).
- a second object of the invention relates to the use of the microfluidic chip according to the first object of the invention to attract and trap a specific biological element.
- the present invention relates to the use of the microfluidic chip according to the first object of the invention or a method for attracting and trapping a specific biological element in vivo, said chip being implanted in vivo. More specifically, the present invention relates to the use of the microfluidic chip according to the first object of the invention or a method for treating or preventing the proliferation and dissemination of a specific biological element in a subject, such as a prokaryotic cell or eukaryote in which the chip is implanted in vivo in a subject.
- the present invention relates to the use of the microfluidic chip according to the first object of the invention or a method for treating or preventing an infection caused by a prokaryotic cell such as a bacterium in which the chip is implanted in vivo in a subject.
- the present invention relates to the use of the microfluidic chip according to the first object of the invention or a method for treating or preventing the proliferation and dissemination of a eukaryotic cell and in particular of a cancerous cell. , preferably after resection of a solid tumor in a subject, wherein the chip is implanted in vivo in a subject.
- the present invention relates to the use of the microfluidic chip according to the first object of the invention or a method for preventing the risks of local recurrence of cancer and/or development of metastatic cancer in a subject, wherein the chip is implanted in vivo in a subject.
- the microfluidic chip is implanted at a distance of 0.1 to 20 cm, preferably from 1 to 10 cm, more preferably at a distance of 5 cm from the resection zone of a solid tumor or focus of bacterial infection in a subject.
- the microfluidic chip is preferably implanted at the level of the resection zone as soon as the solid tumor is removed, preferably immediately after the resection of said tumor.
- the microfluidic chip can be used alone or combined with the simultaneous or sequential administration of other medicinal compounds such as anticancer compounds, in particular chemotherapeutic and/or hormone therapy compounds and/or immunotherapy and/or targeted therapy and/or radiotherapy when the specific biological element is a cancerous cell.
- other medicinal compounds such as anticancer compounds, in particular chemotherapeutic and/or hormone therapy compounds and/or immunotherapy and/or targeted therapy and/or radiotherapy when the specific biological element is a cancerous cell.
- the present invention also relates to a microfluidic chip according to the first object for its use for attracting and destroying a specific biological element in vivo, said chip being implanted in vivo, in accordance with the aforementioned implementation conditions.
- the present invention relates to a microfluidic chip according to the first object for its use for treating or preventing the proliferation and dissemination of a biological element specific in a subject, such as a prokaryotic or eukaryotic cell, in which the chip is implanted in vivo in a subject in accordance with the aforementioned implementation conditions.
- a biological element specific in a subject such as a prokaryotic or eukaryotic cell
- the present invention relates to a microfluidic chip according to the first object for its use for treating or preventing an infection caused by a prokaryotic cell such as a bacterium, in which the chip is implanted in vivo in a subject.
- the present invention relates to a microfluidic chip according to the first object for its use for treating or preventing the proliferation and dissemination of a eukaryotic cell and in particular of a cancerous cell, preferably after the resection of a a solid tumor in a subject, wherein the chip is implanted in vivo in a subject in accordance with the aforementioned implementation conditions.
- the present invention relates to a microfluidic chip according to the first object for its use to prevent the risks of local recurrence of cancer and/or development of metastatic cancer in a subject, in which the chip is implanted in vivo in a subject in accordance with the aforementioned conditions of implementation.
- the duration of use of the microfluidic chip in vivo can be between 2 and 12 months. Following this period of use, a new chip can be implanted.
- the specific biological element is a eukaryotic cell and in particular a cancerous cell
- said cell preferably comes from breast, lung, prostate, bladder, salivary glands, skin, intestine, colon-rectum, thyroid, cervix, endometrium and ovaries, lip-mouth-larynx cancer, kidney, liver, brain, testicles, pancreas, preferentially breast cancer.
- solid tumors not being limiting.
- Example 1 Manufacture of the microfluidic chip for the in vitro concept study
- a microfluidic chip containing in its center a reservoir in which is placed a chemoattractant with a network of microchannels in the form of harpoons, in accordance with the present invention was manufactured.
- a) Fabrication of the MicroChemicals SU-8 Photosensitive Epoxy Resin Mold A silicon plate (diameter 76.2 mm) is prepared in a “piranha” solution followed by dehumidification for 15 to 150°C. The SU-8 resin is deposited on the silicon plate by centrifugal coating (3000 rpm, 30s) in order to obtain the desired thickness (10pm or lOOpm depending on the type used SU-8 2010 or SU-8 2100) .
- the evaporation of the solvents is obtained with very light heating and cooling ramps in order to minimize the mechanical stress in the resin (5°C/min).
- the sample is subjected to 365 nm UV exposure of 125 mJ/cm2 for a thickness of 10 ⁇ m, and 250 mJ/cm2 for a thickness of 100 ⁇ m.
- the plate is then subjected to a post exposure bake (PEB) (4 min at 95° C. for a thickness of 10 ⁇ m and 30 min at 95° C. for a thickness of 100 ⁇ m).
- PEB post exposure bake
- a polydimethylsiloxane (PDMS) silicone polymer is prepared by mixing it with its curing agent (SylgardTM184 silicone elastomer kit from Dow, ratio 1:10). The bubbles formed during mixing are eliminated using a desiccator and a vacuum pump. Once the PDMS has been degassed, it is poured onto the SU-8 mold placed in a Petri dish, then placed in an oven at 80°C for at least 2 hours in order to complete the crosslinking process.
- PDMS polydimethylsiloxane
- the PDMS is peeled off then cut using a circular blade in order to obtain the cylindrical shapes of the devices. These are then pierced using a punch to form the central well which will contain the chemoattractants.
- the final step is to bond the PDMS to a glass substrate to encapsulate the channels. This is obtained by activating the surface to transform the Si-CH 3 function of the PDMS into Si-OH using a plasma 0 2 or air generator. In contact with the glass (Si0 2 ), a permanent Si-O-Si covalent bond will be created.
- a 3% (w/v) aqueous alginate solution was deposited in a porous mold having the shape of the reservoir of the chip.
- the mold is immersed in a calcium chloride crosslinking bath for 24 hours. After 3 washes with miliQ water, the matrix is frozen at -20° C. and then freeze-dried.
- the matrix is gently deposited in the chip.
- the microfluidic chip was implemented in vitro to test its ability to attract MDA-MB-231 breast cancer cells, which are epithelial cells from breast tumors.
- the compound SDF-1 "stromal cell-derived factor" corresponds to the chemoattractant compound capable of attracting MDA-MB-231 cells.
- the MDA-MB-231 cells stably transfected with the “green fluorescent protein” (GFP) are trypsinized on D0. Then 20,000 cells are seeded in a 35 mm petri dish containing the in vitro microfluidic chip in its center. The cells are cultured in Dulbecco's Modified Eagle Medium/Nutrient Mixture F-12 (DMEM F12) 1% fetal calf serum (FCS)+1% antibiotic (streptomycin, penicillin) medium.
- DMEM F12 Dulbecco's Modified Eagle Medium/Nutrient Mixture F-12
- FCS fetal calf serum
- antibiotic streptomycin, penicillin
- the central reservoir of the in vitro microfluidic chip is loaded either with 50 pL of DMEM F12 + 1% FCS (fetal calf serum) + 1% of antibiotic (streptomycin, penicillin) (negative control) or with 50 pL of SDF- 1 alpha at 100 ng/ml in 0.1% BSA in DMEM F12 + + 1% antibiotic (streptomycin, penicillin).
- DMEM F12 + 1% FCS fetal calf serum
- antibiotic streptomycin, penicillin
- SDF- 1 alpha 100 ng/ml in 0.1% BSA in DMEM F12 + + 1% antibiotic (streptomycin, penicillin).
- the cells move from the outside towards the inside of the chip and in particular towards the central reservoir in the presence of the chemoattractant SDF-1 alpha.
- the chemoattractant SDF-1 alpha On the 7th day in the chip containing the chemoattractant, there are 850 cells in the chip, distributed throughout the chip and in particular in the central reservoir.
- the 7th day in the chip not containing the chemoattractant that is to say the negative control chip, there are 154 cells in the chip, exclusively located at the outlet of the microchannels inside the chip.
- an in vitro microfluidic chip equipped with harpoon microchannels containing in its reservoir the chemoattractant SDF-1 alpha at 100 ng/ml, is placed in an incubator under an inverted microscope equipped with a 10X objective and a camera allowing cell monitoring after 5 to 6 days of culture.
- the number of cells having crossed the chip after 5 to 6 days of culture on a portion of the chip corresponding to 7 microchannels was quantified as well as the number of cells leaving the chip after 5 to 6 days of culture. This number was later extrapolated to 200 microchannels, corresponding to the average number of microchannels present in the network of microchannels of a chip according to the invention.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2105106A FR3122830A1 (fr) | 2021-05-17 | 2021-05-17 | Puce microfluidique pour attirer et piéger un élément biologique spécifique |
| PCT/FR2022/050938 WO2022243636A1 (fr) | 2021-05-17 | 2022-05-17 | Puce microfluidique pour attirer et piéger un élément biologique spécifique |
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| Publication Number | Publication Date |
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| EP4340996A1 true EP4340996A1 (fr) | 2024-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22731739.3A Pending EP4340996A1 (fr) | 2021-05-17 | 2022-05-17 | Puce microfluidique pour attirer et piéger un élément biologique spécifique |
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| Country | Link |
|---|---|
| US (1) | US20240253037A1 (fr) |
| EP (1) | EP4340996A1 (fr) |
| CA (1) | CA3218173A1 (fr) |
| FR (1) | FR3122830A1 (fr) |
| WO (1) | WO2022243636A1 (fr) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10953400B2 (en) | 2016-10-26 | 2021-03-23 | Iowa State University Research Foundation, Inc. | High-throughput selective capture of biological cells by dielectrophoresis at a bipolar electrode array |
| WO2018089989A1 (fr) | 2016-11-14 | 2018-05-17 | The Charles Stark Draper Laboratory, Inc. | Destruction sélective de cellules par résonance électromagnétique |
| FR3093645B1 (fr) * | 2019-03-15 | 2021-04-02 | Univ Montpellier | Puce microfluidique pour attirer et détruire un élément biologique spécifique |
-
2021
- 2021-05-17 FR FR2105106A patent/FR3122830A1/fr active Pending
-
2022
- 2022-05-17 WO PCT/FR2022/050938 patent/WO2022243636A1/fr not_active Ceased
- 2022-05-17 CA CA3218173A patent/CA3218173A1/fr active Pending
- 2022-05-17 EP EP22731739.3A patent/EP4340996A1/fr active Pending
- 2022-05-17 US US18/560,483 patent/US20240253037A1/en active Pending
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| Publication number | Publication date |
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| WO2022243636A1 (fr) | 2022-11-24 |
| CA3218173A1 (fr) | 2022-11-24 |
| FR3122830A1 (fr) | 2022-11-18 |
| US20240253037A1 (en) | 2024-08-01 |
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