EP1402258A2 - Procede pour determiner des interactions entre des keratinocytes et des neurones - Google Patents

Procede pour determiner des interactions entre des keratinocytes et des neurones

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Publication number
EP1402258A2
EP1402258A2 EP02760192A EP02760192A EP1402258A2 EP 1402258 A2 EP1402258 A2 EP 1402258A2 EP 02760192 A EP02760192 A EP 02760192A EP 02760192 A EP02760192 A EP 02760192A EP 1402258 A2 EP1402258 A2 EP 1402258A2
Authority
EP
European Patent Office
Prior art keywords
neurons
keratinocytes
cells
skin
effects
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.)
Withdrawn
Application number
EP02760192A
Other languages
German (de)
English (en)
Inventor
Gilles Pauly
Jean-Luc Contet-Audonneau
Louis Danoux
Lauriane Ulmann
Emmanuel M. Jover
Rémy SCHLICHTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF Health and Care Products France SAS
Original Assignee
Cognis France SAS
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Filing date
Publication date
Application filed by Cognis France SAS filed Critical Cognis France SAS
Priority to EP02760192A priority Critical patent/EP1402258A2/fr
Publication of EP1402258A2 publication Critical patent/EP1402258A2/fr
Withdrawn legal-status Critical Current

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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
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
    • G01N33/5044—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics involving specific cell types
    • 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
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • 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
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
    • 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
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
    • G01N33/502—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing non-proliferative effects
    • G01N33/5026—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing non-proliferative effects on cell morphology
    • 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
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
    • G01N33/502—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing non-proliferative effects
    • G01N33/5032—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing non-proliferative effects on intercellular interactions
    • 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
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
    • G01N33/5044—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics involving specific cell types
    • G01N33/5058—Neurological cells

Definitions

  • the invention is in the field of cosmetic and / or dermatological examination methods and relates to a method for determining the interactions between keratinocytes and neurons from spinal ganglia and a device for determining the interactions between these two cell types and the use of these two cell types to investigate different effects the interaction between these two cell types.
  • the skin as the largest organ in human beings carries out numerous vital processes. In addition to its protective functions against environmental influences, the skin is involved in various metabolic, storage and regulatory processes in the body. It is closely connected to the rest of the body through the bloodstream and through the lymphatic and nervous systems. It is made up of several layers and is equipped with blood vessels, nerves and sensory organs.
  • the epidermis As the outermost layer, the epidermis (epidermis) forms the actual protective layer against the environment.
  • keratinocytes are mainly found in the skin's epidermis. These cells play a crucial role in the growth and differentiation of the cells. They form the keratin, which is used to build up the layer of the skin.
  • the human skin is endowed with numerous nerves. A distinction is made between two types of nerves, the autonomic or vegetative nerves and the sensory or cerebrospinal nerves.
  • the sensory nerves transmit the external and internal skin stimuli to the epidermis.
  • the cell bodies of these nerve cells, the so-called neurons, are combined as collections outside the central nervous system in so-called ganglia.
  • ganglia are called spinal ganglia or DRG (dorsal root ganglia) and come from dorsal sensitive nerve roots.
  • DRG diode root ganglia
  • the neurons have several cell processes; the long nerve fibers are called neurites, the short, highly branched fibers are called dendrites.
  • the neurons are connected to other cells via synapses.
  • type A ⁇ and type C which extend in the peripheral direction and from which the free nerve endings terminate Form nerve plexus.
  • This plexus nerve is located directly above the dermis and penetrates into the epidermis.
  • the sub-epidermal nerve plexus is responsible for the detection of stimulation of nociceptors.
  • Nociceptors are nerve cells in the skin that are used to absorb tissue-damaging or potentially tissue-damaging stimuli. These are free nerve endings, ie. H. the peripheral processes of these neurons, whose cell bodies lie in ganglia along the spine (spinal ganglia), end without special end organs in the tissue. Nociceptors are sensitive to mechanical, thermal and chemical stimuli. These stimuli are converted into electronic impulses (transduction) and passed on to the spinal cord. The extensions of the nociceptors are very thin nerve fibers with a relatively low line speed.
  • Keratinocytes are able to produce a variety of substances. These include both cytokines, such as a protein called NGF (nerve growth factor), and molecules with autocrine and paracrine effects. Under normal conditions, these substances are not produced and are therefore not secreted. Due to the influence of external stimuli and stimulations, the cells are stimulated to produce these substances, which are then involved in signal transmission as signal substances. Cytokines and chemokines regulate the proliferation and differentiation of elemental skin components and are produced as an immune response and in inflammation when the stimulation of production was caused by a wound or lesion.
  • cytokines such as a protein called NGF (nerve growth factor)
  • NGF nerve growth factor
  • chemokines regulate the proliferation and differentiation of elemental skin components and are produced as an immune response and in inflammation when the stimulation of production was caused by a wound or lesion.
  • the metabolism of keratinocytes can be influenced by messenger molecules or neurotransmitters of the nerve endings of the plexus nerve (cf. Huang IT, Lin WM, Shun CT, Hsieh ST, Influence of cutaneous nerves on keratinocyte proliferation and epidermal thickness in mice. Neuroscience, 94: 965 -973, 1999). This shows that the mutual influence between keratinocytes and sensory neurons begins at an early stage of cutaneous development.
  • the complex object of the invention was therefore to provide a method with which it is possible to carry out in vitro examinations which provide a model that is as realistic as possible for analyzing the interaction between neurons and keratinocytes. It should be possible to investigate the fast and slow interaction of these two cell types with this method.
  • Another object of the invention was to provide a method using a model that allows both the cultivation of animal cells and the cultivation of human cell lines.
  • the method according to the invention should enable the investigation of pathogenic mediators and the identification and optimization of new active ingredients and methods for cosmetics and for the treatment of cutaneous diseases. Furthermore, it should be possible to investigate different interactions that are triggered by the effects of various factors such as stress factors or the like. In particular, it should be possible to clarify which interactions are triggered by these effects on the formation of the horny layer of the skin or on the secretion of different molecules that are synthesized by keratinocytes in response to stimulation.
  • the invention relates to a method for determining interactions between keratinocytes and neurons, in which the two cell types are cultured in co-culture in two separate compartments which allow the passage and exchange of nerve fibers and soluble factors.
  • the method serves to determine interactions between keratinocytes and neurons from spinal ganglia, especially the dorsal ganglia (DRG).
  • spinal ganglia especially the dorsal ganglia (DRG).
  • Keratinocyte used according to the invention denotes cells from the epidermis, which are also referred to as epithelial cells. Keratinocytes form the keratin which is used to build up the horny layer of the skin and are also able to produce a large number of substances. These include Both cytokines, such as the growth factor NGF (nerve growth factor) and molecules with autocrine and paracrine effects. Under normal conditions, these substances are not produced and therefore not secreted.
  • cytokines such as the growth factor NGF (nerve growth factor)
  • NGF nerve growth factor
  • cytokines and chemokines regulate the proliferation and differentiation of elemental skin components and are produced as an immune response and in inflammation if the stimulation of production by a wound or lesion sion was caused.
  • neurons are to be understood as nerve cells as a whole.
  • the terms neuron and nerve cell are used synonymously. These are composed of a cell nucleus or cell body and several cell processes, the so-called nerve fibers. Neurons in the sense of the invention are the sensory or cerebrospinal nerves. The sensory nerves transmit the external and internal skin stimuli to the epidermis.
  • the cell bodies of the neurons or nerve cells are combined as collections outside the central nervous system in so-called ganglia.
  • ganglia These ganglia are called spinal ganglia or DRG (dorsal root ganglia) and come from dorsal sensitive nerve roots.
  • the neurons have several cell processes; the long nerve fibers are called neurites, the short, highly branched fibers are called dendrites.
  • the neurons are connected to other cells via synapses.
  • type A ⁇ and type C which extend in the peripheral direction and of which the free nerve endings form the nerve plexus.
  • This plexus nerve is located directly above the dermis and penetrates into the epidermis.
  • the sub-epidermal nerve plexus is responsible for the detection of stimulation of nociceptors.
  • Nociceptors are nerve cells in the skin that are used to absorb tissue-damaging or potentially tissue-damaging stimuli. These are free nerve endings, i.e. H. the peripheral processes of these neurons, whose cell bodies lie in ganglia along the spine (spinal ganglia), end without special end organs in the tissue. Nociceptors are sensitive to mechanical, thermal and chemical stimuli. These stimuli are converted into electronic impulses (transduction) and passed on to the spinal cord. The extensions of the nociceptors are very thin nerve fibers with a relatively low line speed.
  • the neurons or nerve cells from spinal ganglia can be animal cells or human cells that are present in normal or modified cell lines.
  • neuroblasts are a type of modified neuron that is derived from neuronal tumors.
  • the term “co-culture” is to be understood as a possibility with which the two cell types neurons and keratinocytes are cultivated spatially separated in two compartments, that is to say two physically separate sub-areas, but an exchange and passage of soluble factors The exchange of keratinocytes and whole nerve cells is prevented.
  • the cells can be cultivated in the same medium under the same conditions.
  • the possible cultivation in two compartments can be achieved according to the invention by means of a device in which a separating disc or partition is used
  • the vessel is divided into two compartments.
  • the partition or partition is preferably adhered to the vessel with a mixture of cellulose and lubricants.
  • the vessel is preferably a Petri dish.
  • the partition or partition can be a membrane, pla tte, disc, wall or a ring, preferably it is a ring.
  • the material of this partition or the partition is freely selectable between materials that do not dissolve and are not destroyed by the cultivation conditions of the two cell types and / or the adhesive material. Glass is preferably used as the material for the cutting disc or partition.
  • the sensory neurons are cultivated in the center of the ring and the keratinocytes in the outer compartment. The development This "co-culture" can be examined with the aid of microscopes. The migration or the passage of neurites under the partition or partition, preferably the ring by microcrossing through the cellulose lubricant layer, was found.
  • the method according to the invention provides a model which is comparable to physiological conditions which prevail between keratinocytes and nerve cell bodies which are located in the ganglia. Under physiological conditions, the cell types are only connected by nerve fibers and synapses and are therefore spatially separated from one another.
  • the device for the method according to the invention allows separate stimulation of the two cell types in the different compartments.
  • This stimulation can be chemical, mechanical, or electronic.
  • all means are suitable as lubricants in the sense of the invention which form a layer with cellulose which makes it possible for the partition disk or partition according to the invention to adhere to the vessel according to the invention for producing the device according to the invention from two compartments.
  • These are preferably oils, silicone oils, waxes, wax esters, fats, soaps, salts of fatty acids or mixtures thereof, in particular those which show the desired properties at temperatures greater than or equal to 30 ° C., preferably at the cultivation temperatures of the cells.
  • the preferred lubricants are usually also used as greases or oils for sealing centrifuges.
  • the present invention encompasses the knowledge that the lubricants can be chosen by the person skilled in the art depending on the partition material selected or on the desired adhesive properties and on the desired degree of viscosity of the cellulose lubricant layer.
  • the ratio of the proportions by weight of the amount of lubricant used in relation to the proportion by weight of cellulose used can be from 10/90 to 90/10.
  • a ratio of 30 parts of lubricant to 70 parts of cellulose is preferred; a ratio of 50 parts of lubricant to 50 parts of cellulose is particularly preferred.
  • soluble factors are understood to mean all substances which, under the cultivation conditions of the device according to the invention, dissolve in the culture medium and are capable of the membrane or the layer of cellulose and lubricant which serves to adhere the separating disc or partition to penetrate and thus to get into the neighboring compartment.
  • These factors can be substances which are selected from the group which is formed by growth factors which are produced by the keratinocytes, in particular the nerve growth factor NGF; neurotransmitter; Active substances that cause cell innervation, ions such as sodium, potassium, calcium and / or chloride ions.
  • the chemical composition of the neurotransmitters can be divided into amino acids [e.g. B. glycine, L-glutamic acid, 4-aminobutyric acid (GABA)], amino acid derivatives (e.g. Acetylcholine), monoamines (mostly catecholamines such as L-noradrenaline, L-adrenaline, dopamine, but also serotonin, adenosine, adenosine 5'-di- and triphosphate), peptides (neuropeptides, e.g. bradykinin, Enkephalins, endorphins, substance P) and gaseous oxides (nitrogen monoxide, carbon oxide).
  • amino acids e.g. B. glycine, L-glutamic acid, 4-aminobutyric acid (GABA)
  • amino acid derivatives e.g. Acetylcholine
  • monoamines mostly catecholamines such as L-noradrenaline,
  • the keratinocytes and neurons are animal cells or the keratinocytes and neurons from spinal ganglia to be cultivated are human cell lines.
  • the animal neurons are neurons from newborn rats which have already reached their natural maturation. This can be seen as a supplementary condition for a good reproducibility of the results in contrast to the use of embryonic neurons.
  • the cell lines of human neurons are nerve cells of the dorsal ganglia or cell lines of human neurons such as the cell line HD10.6.
  • Cell lines of human neuroblasts such as SK-N-AS, SK-N-Fl, SK-N-DZ, SK-PN -DW, SK-N-MC and SK-N-SH or cell lines of neuroblasts from rodents, especially mice and rats, such as ND27, ND7 / 23, ND-C, ND15, ND8 / 34, ND3 and BE (2) - M17.
  • the method according to the invention is used to characterize released substances and / or intervening receptors from the two cell types, in particular from neuromediators and / or cytokines and / or steroids.
  • the substances and / or receptors to be characterized can be both soluble factors in the sense of the invention or substances and / or receptors which are transmitted from the nerve endings of the neurons in the compartment of the keratinocytes through the layer of cellulose and lubricant via the nerve endings to be released.
  • these substances and / or receptors can lead to innervation of the keratinocytes and stimulate the metabolism of the keratinocytes. The stimulation of the metabolism of the keratinocytes can then lead to an increased release of substances, in particular cytokines.
  • pathogenic keratinocytes are used to carry out tests which are selected from the group formed by: testing pathogenic mediators which are responsible for cutaneous diseases, testing the mechanisms of action of active substances which are used for treating cutaneous diseases, identification new active ingredients as well as identification and optimization of new treatment methods for cutaneous diseases, especially psoriasis,
  • Pathogenic mediators in the sense of the invention are understood to mean mediators which can cause or cause diseases, such as chemical substances, viruses, mites, microorganisms such as bacteria or fungi. In the sense of the invention, these pathogenic mediators lead to diseases of the skin, since the keratinocytes are attacked and damaged.
  • the cutaneous diseases whose mediators can be examined using the method according to the invention and for which new active substances and their mechanisms of action can be identified in order to optimize new treatment methods include, in principle, all known skin diseases which have not yet been researched. Eczema, scabies or scabies are preferred, Chronic skin diseases such as nettle fever and psoriasis have been examined, and psoriasis in particular.
  • Psoriasis is a chronic skin disease with the formation of sharply defined, occasionally itchy red spots of various sizes and shapes, which are covered with silver-white scales.
  • the cause of the disease is a disturbance in the metabolism of the upper layers of the skin with the accelerated formation of cells of the epidermis. Triggers of a psoriasis manifestation can e.g. B. Infections and injuries.
  • the method according to the invention is used to investigate the mechanisms of action of active substances on human cell lines for cosmetic agents, preferably cosmetic agents for the skin and / or scalp.
  • the method according to the invention is used to identify and optimize treatment methods for sensitive skin.
  • the method according to the invention is used to investigate the development of interactions between keratinocytes and neurons, in particular to investigate the formation of neurites and / or dendrites in the compartment of the keratinocytes.
  • One way of studying the development of interactions between keratinocytes and neurons is to observe and characterize the interactions using a microscope. At the border to the partition or partition in the compartment of the keratinocytes it can be observed, among other things, whether nerve fibers have penetrated the membrane or the layer of cellulose and lubricant.
  • Immunocytochemical methods using different antibodies can be used to identify the cells.
  • anti-PGP 9.5 can be used as antibodies which mark the branching of the nerve fibers.
  • Anti-synaptotagmins can also be used, which mark vesicular proteins that play a crucial role in the exocytosis of synaptic vesicles, or, for example, anti-peripherins, which mark filaments of the cytoskellet.
  • Antibodies against neuropeptides such as substance P or CGRP (Calcitonin Gene-Realted Peptide) can also be used.
  • specific antibodies against keratin 14 can be used to identify the keratinocytes.
  • the method according to the invention is used to investigate interactions between keratinocytes and neurons which are triggered by effects which are selected from the group formed by skin aging effects, effects by stress factors, effects by the influence of chemical substances and effects by mechanical or electrical stimulation of neurons and / or keratinocytes,
  • skin aging effects can be, for example, natural skin aging processes in which the restricted metabolism of the cells leads to a reduced synthesis of substances that are crucial for the structure of the skin.
  • skin aging processes caused by oxidation, skin aging processes caused by radical reactions and bacterial and hormonal effects Conditional changes in the skin, e.g. acne, are understood to mean this.
  • Another object of the invention is a method for examining effects of stress factors on the formation of multi-layered epithelia and in particular on the formation of the horny layer of the skin by using keratinocytes on a substrate, such as collagen gel, in co-culture containing cells selected from the group formed by fibroblasts, neurons, glia cells, melanocytes and Langerhans cells.
  • stress factors are in principle all factors which influence the interaction between keratinocytes and neurons, preferably stress factors which stimulate the metabolism of the cell types and, in particular, stress factors which are selected from the Group formed by UV radiation, heat shock, osmotic shock and environmental pollution such as heavy metal pollution, ozone or the like.
  • Another object of the invention is a method for the investigation of effects by chemical substances on the formation of multi-layered epithelia and in particular on the formation of the horny layer of the skin by using keratinocytes on a substrate, such as collagen gel, in co-culture containing cells selected from the group formed by fibroblasts, neurons, glia cells, melanocytes and Langerhans cells.
  • the cells are animal cells or human cell lines, in particular the cells or cell lines which are also preferred for the first object of the invention.
  • the methods of the further objects of the invention are preferably used to investigate mechanisms of action of active ingredients for cosmetic and / or pharmaceutical compositions for the skin and / or scalp,
  • Another object of the invention is a device for determining interactions between keratinocytes and neurons, in particular neurons from spinal ganglia, especially neurons of the dorsal ganglia (DRG), according to the interactions described above, in which the two cell types are cultivated in co-culture in two separate compartments which allow the passage and exchange of nerve fibers and / or soluble factors.
  • the possible cultivation in two compartments can be achieved according to the invention by a device in which a vessel is divided into two compartments by a partition disk or partition.
  • the partition disk or partition is preferably adhered to the vessel with a mixture of cellulose and lubricants.
  • the vessel is preferably a petri dish.
  • the separating disc or partition can be a membrane, plate, disc, wall or a ring, preferably a ring.
  • the material of this partition or the partition is freely selectable between materials that do not dissolve and are not destroyed by the cultivation conditions of the two cell types and / or the adhesive material. Glass is preferably used as the material for the cutting disc or partition.
  • the sensory neurons are cultivated in the center of the ring and the keratinocytes in the outer compartment.
  • the development of this "co-culture” can be examined with the aid of microscopes.
  • the device according to the invention provides a model which is comparable to physiological conditions which prevail between keratinocytes and nerve cell bodies which are located in the ganglia. Under physiological conditions, the cell types are only connected by nerve fibers and synapses and are therefore spatially separate from one another Cut.
  • the device according to the invention allows separate stimulation of the two cell types in the different compartments.
  • This stimulation can be chemical, mechanical, or electronic.
  • all means are suitable as lubricants in the sense of the invention which form a layer with cellulose which makes it possible for the partition disk or partition according to the invention to adhere to the vessel according to the invention for producing the device according to the invention from two compartments.
  • These are preferably oils, silicone oils, waxes, wax esters, fats, soaps, salts of fatty acids or mixtures thereof, in particular those which show the desired properties at temperatures greater than or equal to 30 ° C., preferably at the cultivation temperatures of the cells.
  • the preferred lubricants are usually also used as greases or oils for sealing centrifuges.
  • the present invention encompasses the knowledge that the lubricants can be chosen by the person skilled in the art depending on the partition material selected or on the desired adhesive properties and on the desired degree of viscosity of the cellulose lubricant layer.
  • the ratio of the proportions by weight of the amount of lubricant used in relation to the proportion by weight of cellulose used can be from 10/90 to 90/10 be.
  • a ratio of 30 parts of lubricant to 70 parts of cellulose is preferred; a ratio of 50 parts of lubricant to 50 parts of cellulose is particularly preferred.
  • Another object of the invention is the use of keratinocytes and / or neurons, in particular neurons from spinal ganglia, especially neurons of the dorsal ganglia (DRG), in co-culture to investigate the interaction between these cells, in particular to investigate the effects on the interaction described above of these cells.
  • the cells are animal cells or human cell lines, in particular the cells or cell lines which are also preferred for the first subject of the invention.
  • the methods according to the invention preferably the first subject of the invention as well as the device according to the invention and the uses according to the invention, enable detailed investigations of the interactions and mutual signaling between sensory neurons and keratinocytes. Among other things, the following examinations are possible:
  • n Human cell lines are used in the methods according to the invention for the search for active substances and for the investigation of cutaneous diseases for cosmetic uses.
  • the neurons were obtained from tissues from newborn rats according to the method of Scott or Dichter, described in: 1.
  • Scott BS Adult mouse dorsal root ganglia neurons in cell culture, J. Heurohiol, 8: 417-427, 1977 and 2 " Dichter MA, Fischhach GD, The action potential of chick dorsal root ganglion neurones maintained in cell culture, J. Physiol, 267: 281-298, 1977.
  • the neurons from newborn rats, which were at most one week old, were placed in a petri dish PBS given and chilled. They were cleaned with a scalpel to suppress the branching of the nerve fibers.
  • the cells were then washed twice with PBS without calcium ions and without magnesium ions and subjected to an enzymatic trypsin treatment (0.05%). After the cell suspension had been obtained, the supernatant of the solution was centrifuged at 150 G for 8 min. The residue was washed and placed in DMEM medium.
  • the cellular suspension containing neurons and glia cells was counted using a particle counter (Mallassey slide). The suspension was then cultivated at a density of 150,000 cells / cm 2 .
  • the keratinocytes were cultivated according to the method of Rheinwald et al. described in: Rheinwald JG, Green H, Serial cultivation of strains of human epidermal keratinocytes: the formation of keratinizing colonies from Single cells, Cell, 6: 331-434, 1975. Newborn rats, which were a maximum of 24 hours old, were examined Cold anesthetized and killed. Subsequently, about 1 cm 2 large pieces of skin were cut out and digested enzymatically by trypsin (0.2%).
  • the cells were cultivated in a vessel which had previously been loaded with poly-lysine or collagen in order to achieve cell adhesion. Keratinocytes were only cultivated on collagen, while the neurons could be cultivated on both media. The cultivation was carried out at 37 ° C. For co-cultivation, a glass ring with a mixture of cellulose and lubricant was attached and fixed in a petri dish. The neurons were cultivated in the inner compartment and the keratinocytes outside the ring in the outer compartment.
  • the neuroblasts were incubated for 4 days in a KCI solution of 50mM, the intracellular calcium level was determined by means of a fluorescence measurement.
  • the ratio F350 / F380 - fluorescence at the wavelength of light absorption to fluorescence at the wavelength of emission - was plotted as a function of time (see Figure 1).
  • neuroblast cell lines can represent markers for the functions of the sensory neurons.

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Abstract

L'invention concerne un procédé pour déterminer des interactions entre des kératinocytes et des neurones des ganglions spinaux, selon lequel les deux types de cellules sont cultivés en co-culture dans deux compartiments séparés permettant le passage et l'échange de fibres nerveuses et/ou de facteurs solubles. La présente invention porte également sur un dispositif pour déterminer les interactions entre ces deux types de cellules et sur l'utilisation de ces deux types de cellules pour examiner des effets variés sur leur interaction.
EP02760192A 2001-07-02 2002-06-22 Procede pour determiner des interactions entre des keratinocytes et des neurones Withdrawn EP1402258A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02760192A EP1402258A2 (fr) 2001-07-02 2002-06-22 Procede pour determiner des interactions entre des keratinocytes et des neurones

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01401756A EP1273913A1 (fr) 2001-07-02 2001-07-02 Procédé de détermination de l'interaction entre des keratinocytes et des neurones
EP01401756 2001-07-02
PCT/EP2002/006914 WO2003005023A2 (fr) 2001-07-02 2002-06-22 Procede pour determiner des interactions entre des keratinocytes et des neurones
EP02760192A EP1402258A2 (fr) 2001-07-02 2002-06-22 Procede pour determiner des interactions entre des keratinocytes et des neurones

Publications (1)

Publication Number Publication Date
EP1402258A2 true EP1402258A2 (fr) 2004-03-31

Family

ID=8182790

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01401756A Withdrawn EP1273913A1 (fr) 2001-07-02 2001-07-02 Procédé de détermination de l'interaction entre des keratinocytes et des neurones
EP02760192A Withdrawn EP1402258A2 (fr) 2001-07-02 2002-06-22 Procede pour determiner des interactions entre des keratinocytes et des neurones

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01401756A Withdrawn EP1273913A1 (fr) 2001-07-02 2001-07-02 Procédé de détermination de l'interaction entre des keratinocytes et des neurones

Country Status (3)

Country Link
EP (2) EP1273913A1 (fr)
AU (1) AU2002325843A1 (fr)
WO (1) WO2003005023A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005071065A1 (fr) * 2004-01-26 2005-08-04 Cognis France S.A.S Procede permettant d'etudier les interactions fonctionnelles entre les neurones sensoriels et les keratinocytes ou les melanocytes
FR2895748B1 (fr) 2006-01-05 2008-04-04 Oreal Modele de culture cellulaire et ses applications
JP2013021946A (ja) * 2011-07-19 2013-02-04 Shiseido Co Ltd 皮膚刺激評価用ｉｎｖｉｔｒｏ皮膚モデル組成物及びそれを用いた評価方法
EP3194559A1 (fr) 2015-11-27 2017-07-26 Technische Universität Ilmenau Procédé et dispositif pour la fermentation
WO2020201572A1 (fr) 2019-04-05 2020-10-08 Université De Bretagne Occidentale Inhibiteurs du récepteur 2 activé par une protéase pour le traitement d'une neuropathie sensorielle induite par une intoxication neurotoxique marine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2135191C1 (ru) * 1990-04-24 1999-08-27 Ортек Интернэшнл, Инк. Композиционный эквивалент живой кожи, способ его получения, тест-набор
EP0497399A1 (fr) * 1991-01-28 1992-08-05 The Procter & Gamble Company Procédé pour évalver l'irritation de la peau
DE19537774C2 (de) * 1994-11-18 1996-09-19 Heraeus Instr Gmbh Verfahren zur Zellkultivierung und Vorrichtung zur Durchführung des Verfahrens
AU1183797A (en) * 1995-10-10 1997-04-30 Monell Chemical Senses Center Method for measuring sensory irritation in vitro

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03005023A3 *

Also Published As

Publication number Publication date
EP1273913A1 (fr) 2003-01-08
AU2002325843A1 (en) 2003-01-21
WO2003005023A2 (fr) 2003-01-16
WO2003005023A3 (fr) 2003-10-23

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