WO2023210403A1 - 毛球部毛根鞘(dsc)細胞の毛髪再生能を評価する方法、毛髪を再生するための組成物及びその製造方法 - Google Patents
毛球部毛根鞘(dsc)細胞の毛髪再生能を評価する方法、毛髪を再生するための組成物及びその製造方法 Download PDFInfo
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- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/36—Skin; Hair; Nails; Sebaceous glands; Cerumen; Epidermis; Epithelial cells; Keratinocytes; Langerhans cells; Ectodermal cells
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/38—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix containing added animal cells
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- A61P17/00—Drugs for dermatological disorders
- A61P17/14—Drugs for dermatological disorders for baldness or alopecia
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Definitions
- the present invention relates to a method for evaluating the hair regeneration ability of hair bulb root sheath (DSC) cells, a composition for regenerating hair, and a method for producing the same.
- DSC hair bulb root sheath
- hair is produced by hair follicles present in the skin.
- a hair follicle is a tissue layer that surrounds hair, and is composed of the ectoderm-derived hair matrix (hair matrix cells), inner root sheath, and outer root sheath, as well as the mesoderm-derived dermal root sheath, dermal papilla, etc. .
- Hair matrix cells surrounding the dermal papilla are induced to divide repeatedly by nutrients and proteins supplied from the dermal papilla, and form hair by keratinization.
- Thinning hair and alopecia occur due to problems with hair growth. Thinning hair and alopecia include alopecia in the middle years, alopecia areata, and telogen effluvium, with the most common being alopecia in the middle years. Middle age alopecia is mainly caused in men by the influence of male hormones, and is also called androgenetic alopecia. Hair is regrown while repeating a hair cycle consisting of a growth phase, a regression phase, and a resting phase. Male pattern baldness is a symptom caused by a shortening of the growth phase in this hair cycle and an increase in the proportion of thin and short hair.
- the topical drug minoxidil and the oral drug finasteride are mainly used to treat middle-aged hair loss. All of these treatments have been confirmed to be effective and safe, but they are not necessarily effective for all cases of middle age alopecia.
- autologous hair transplantation is being carried out as a treatment for middle age alopecia.
- Autologous hair transplantation is a surgical procedure in which hair including hair roots collected from the temporal region or the back of the head is transplanted to the hair loss area of one's own body.
- this surgical method involves transplanting the patient's own hair to another location, it does not increase the total number of hair.
- DSC dermal sheath cup cell
- Non-patent Document 7 Patent Document 1
- the purpose of the present invention is to provide a method for evaluating the hair regeneration ability of hair bulb root sheath (DSC) cells, a composition for regenerating hair, and a method for producing the same.
- DSC hair bulb root sheath
- the present invention includes the following inventions.
- a method for evaluating the hair regeneration ability of hair bulb root sheath (DSC) cells using the expression level of genes related to smooth muscle differentiation as an index [2] An item in which the gene related to smooth muscle differentiation is one or more genes selected from the group consisting of a gene for a factor that controls the expression of a smooth muscle differentiation marker gene and a smooth muscle differentiation marker gene. The method described in 1. [3] The method according to item 2, wherein the gene of the factor controlling the expression of the smooth muscle differentiation marker gene is one or more genes selected from the group consisting of the SRF gene, the MYOCD gene, and the MRTFA gene.
- the smooth muscle differentiation marker gene is one or more genes selected from the group consisting of the CALD-1 gene and the ACTA2 gene.
- the hair regeneration ability of the DSC cell is evaluated to be low; According to any one of items 1 to 4, the hair regeneration ability of the DSC cells is evaluated to be high when the expression level of the gene related to smooth muscle differentiation in the DSC cells is lower than a predetermined threshold.
- Method [6] The method according to any one of items 1 to 5, wherein the hair regeneration ability is evaluated by hair diameter and/or hair density.
- the predetermined threshold value is the expression level of a gene associated with smooth muscle differentiation of DSC cells transplanted to each subject in a subject group with increased hair diameter and/or hair density;
- DSC hair bulb root sheath
- An item in which the gene related to smooth muscle differentiation is one or more genes selected from the group consisting of a gene for a factor that controls the expression of a smooth muscle differentiation marker gene and a smooth muscle differentiation marker gene.
- the gene of the factor controlling the expression of the smooth muscle differentiation marker gene is one or more genes selected from the group consisting of the SRF gene, the MYOCD gene, and the MRTFA gene.
- composition according to item 9 or 10 wherein the smooth muscle differentiation marker gene is one or more genes selected from the group consisting of the CALD-1 gene and the ACTA2 gene.
- the DSC cell that expresses a gene related to smooth muscle differentiation at a low level is a DSC cell whose expression level of the gene related to smooth muscle differentiation is lower than a predetermined threshold value.
- Composition according to item 1. [13] The composition according to any one of items 8 to 12, which increases hair diameter and/or hair density.
- the predetermined threshold value is the expression level of a gene associated with smooth muscle differentiation of DSC cells transplanted to each subject in a subject group with increased hair diameter and/or hair density; An item that is a threshold value determined by comparison with the expression level of a gene related to smooth muscle differentiation of DSC cells transplanted into each subject in a subject group in which hair diameter and/or hair density did not increase. 13.
- a method for producing a composition for regenerating hair comprising hair bulb root sheath (DSC) cells, comprising: Selecting or enriching DSC cells that low express genes related to smooth muscle differentiation from a cell group containing DSC cells, including methods.
- DSC hair bulb root sheath
- An item in which the gene related to smooth muscle differentiation is one or more genes selected from the group consisting of a gene for a factor that controls the expression of a smooth muscle differentiation marker gene and a smooth muscle differentiation marker gene. 15. The method described in 15.
- the gene of the factor controlling the expression of the smooth muscle differentiation marker gene is one or more genes selected from the group consisting of the SRF gene, the MYOCD gene, and the MRTFA gene.
- the smooth muscle differentiation marker gene is one or more genes selected from the group consisting of the CALD-1 gene and the ACTA2 gene.
- the composition increases hair diameter and/or hair density.
- the predetermined threshold value is the expression level of a gene associated with smooth muscle differentiation of DSC cells transplanted to each subject in a subject group with increased hair diameter and/or hair density; An item that is a threshold value determined by comparison with the expression level of a gene related to smooth muscle differentiation of DSC cells transplanted to each subject in a group of subjects in which hair diameter and/or hair density did not increase. 19. The method described in 19. [22] The method according to item 19, wherein the predetermined threshold value is the expression level of a gene related to smooth muscle differentiation in the entire cell group including DSC cells before performing the method.
- the present inventors have discovered for the first time that there is an inverse correlation with the expression level of a DSC cell factor linked to actual therapeutic outcomes, that is, a gene related to smooth muscle differentiation.
- a DSC cell factor linked to actual therapeutic outcomes that is, a gene related to smooth muscle differentiation.
- Results of searching for various marker genes that correlate with cumulative hair diameter Correlation between the relative expression level of the gene in each DSC cell (normalized by the GAPDH gene) and the results of hair regeneration treatment (integrated hair diameter) for each subject, when the expression level in any sample is taken as 100% It was confirmed. After transplantation, the rate of change at each time point (relative to 0 months [0M] or placebo ratio [P] (site where DSC cells were not transplanted) was used as the result of hair regeneration treatment (cumulative hair diameter). The correlation coefficient between the relative gene expression level and the results of hair regeneration treatment (integrated hair diameter) is calculated and shown.
- a group of subjects with good treatment results that is, a group of subjects who showed high efficacy (High (D)) and a group of subjects with low efficacy (Low (D))
- the expression levels of the SRF gene and CALD1 gene in the DSC cells used for treatment in each group were calculated and compared between the groups. It was found that the expression of SRF gene and CALD1 gene was significantly lower in the DSC cells of the subject group with high therapeutic effect. *p ⁇ 0.05 (Student t-test).
- the deepest swollen part of the hair inside the skin is called the hair bulb, and the part made of mesenchymal cells in the center of the hair bulb is called the dermal papilla.
- the dermal papilla is filled with capillaries and nerves that take in nutrients and oxygen from food and are responsible for hair development and growth.
- HF Heair Follicle
- hair matrix hair matrix cell
- inner root sheath and outer root sheath, which are epithelial cells
- dermal hair root which is mesenchymal cells.
- the tissues or cells used in the present invention may be derived from any animal, but are preferably derived from vertebrates, more preferably from mammals, and most preferably from humans.
- DS Dermathelial Sheath
- ⁇ -SMA actin positive cells
- the dermal hair root sheath is continuous with the dermal papilla at the lowest end of the hair bulb. As described below, in this specification, the dermal root sheath includes the hair bulb root sheath and the upper dermal hair root layer.
- DSC skin sheath cup
- hair bulb root sheath cells are cells that constitute the hair bulb root sheath.
- Hair bulb root sheath cells are known to be precursor cells of dermal papilla cells, and it is known that transplanting hair bulb root sheath cells into the skin induces hair follicles at the transplant site. ing.
- a hair follicle-derived cell group containing a high proportion of hair bulb root sheath cells and/or a high activity thereof is used. If a cell group or composition can be selected, it is possible to provide a hair follicle-derived cell group with higher hair follicle-inducing ability or a composition for regenerating hair follicles containing a hair follicle-derived cell group. becomes.
- UDS cells refer to cells of the dermal hair root sheath excluding the above-mentioned hair bulb root sheath portion.
- cell group derived from hair follicles refers to a cell group containing the cells that constitute the hair follicles described above.
- a composition for regenerating hair that contains hair bulb sheath (DSC) cells includes, for example, a biocompatible substance in addition to DSC cells.
- biocompatible substances include water, physiological saline, phosphate buffer, cell culture medium, biocompatible hydrogels (chitosan gel, collagen gel, gelatin, peptide gel, laminin gel, fibrin gel, etc.), etc. It may be possible, but is not limited to these.
- the composition of the present invention can also be a composition in which DSC cells are combined with one or more other components, such as excipients, carriers, and/or diluents.
- the composition and form of the composition are arbitrary and may be appropriately selected depending on the conditions such as the active ingredient and the intended use.
- the composition can be manufactured by a conventional method in a formulation in which the composition is appropriately combined with excipients, carriers and/or diluents, and other components depending on the dosage form.
- the present inventors discovered that the hair regeneration effect is high when genes related to smooth muscle differentiation expressed in DSC cells are low in expression, leading to the completion of the present invention. .
- hair regeneration ability refers to the ability to regenerate hair, and includes, for example, the hair diameter (e.g., the average hair diameter in a given region, or the integrated value (integrated Hair diameter)) and/or hair density (for example, the number of hairs in a given area (total hair density)).
- the hair diameter e.g., the average hair diameter in a given region, or the integrated value (integrated Hair diameter)
- hair density for example, the number of hairs in a given area (total hair density)
- genes related to smooth muscle differentiation refer to one or more genes selected from the group consisting of smooth muscle differentiation marker genes and genes of factors that control the expression of smooth muscle differentiation marker genes. It is.
- smooth muscle differentiation marker gene is a gene that is known as a smooth muscle differentiation marker and encodes a protein involved in the contraction of smooth muscle cells, such as Caldesmon-1 (abbreviation: CALD1). and Actin alpha 2, smooth muscle (abbreviation: ACTA2).
- a gene of a factor that controls the expression of a smooth muscle differentiation marker gene refers to a gene that encodes a protein that constitutes a transcription factor known as a factor that controls smooth muscle differentiation.
- factors such as serum response factor (abbreviation: SRF), Myocardin (abbreviation: MYOCD), and Myocardin related transcription factor A (abbreviation: MRTFA).
- the specific sequence of the gene that can be used in the present invention is not limited to the sequence obtained by the above-mentioned accession number, and for example, 70% or more of the nucleotide sequence specified by the above-mentioned accession number, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, 99% This includes the same sequences and their splicing variants.
- the gene may be derived from any animal, but is preferably derived from a vertebrate, more preferably a mammal, and most preferably a human.
- the present invention provides a method for evaluating the hair regeneration ability of hair bulb sheath (DSC) cells using the expression level of a gene related to smooth muscle differentiation as an index. According to the present invention, by measuring the expression level of the above gene in a DSC cell or a cell group containing DSC cells, it is possible to predict hair regeneration ability in advance even before administration to a subject.
- DSC hair bulb sheath
- the genes related to smooth muscle differentiation that can be applied to the present invention are one or more genes selected from the group consisting of smooth muscle differentiation marker genes and genes of factors that control the expression thereof.
- the smooth muscle differentiation marker gene is one or more genes selected from the group consisting of the CALD-1 gene and the ACTA2 gene
- the gene of the factor controlling the expression of the smooth muscle differentiation marker gene is The gene may be one or more genes selected from the group consisting of the SRF gene, the MYOCD gene, and the MRTFA gene.
- the genes related to smooth muscle differentiation that can be applied to the present invention may be one or more genes selected from the group consisting of the CALD-1 gene and the SRF gene.
- the expression level of the above genes in the DSC cells after culture can be determined before administration to the subject. It also becomes possible to predict hair regeneration ability in advance.
- RNA expression level refers to something that can be determined by detecting and measuring a transcript transcribed from any gene or a translation product translated using the transcript as a template.
- the transcription product refers to, for example, an RNA strand that is transcribed using the DNA of a gene as a template, that is, an RNA strand that is synthesized by RNA polymerase, and an RNA strand that is modified within a cell after transcription.
- An example of the RNA strand included in the transcription product is messenger RNA (mRNA). These RNA strands also include those that are processed within the cell after transcription.
- Translation products are, for example, polypeptide chains that are translated using transcripts transcribed by genes as templates, that is, polypeptide chains that are synthesized by ribosomes, and proteins that are formed by the folding of the polypeptide chains. means. Translation products also include polypeptide chains or protein fragments.
- the expression level of the gene can be measured using known methods. For example, when measuring gene transcription products to measure gene expression levels, appropriate probes are designed by referring to the sequence of the gene of interest, and these are used to perform quantitative PCR (qPCR). It can be measured by using a method such as a method), an in situ hybridization method, a Northern blotting method, or a DNA microarray method.
- qPCR quantitative PCR
- an antibody that detects a protein translated by the gene of interest may be used, such as Western blotting or flow cytometry (FACS). method), ELISA method, etc.
- the expression levels of genes can be compared by normalizing (standardization) by the expression level of any housekeeping gene.
- Housekeeping genes that can be used for comparison include, for example, GAPDH (glyceraldehyde-3-phosphate dehydrogenase), ⁇ -actin, ⁇ 2-microglobulin, and HPRT1 (hypoxanthine phosphoribosyltransfer). Examples include 1), but this also includes Not limited.
- the present invention evaluates that the hair regeneration ability of the DSC cells is low when the expression level of the gene related to smooth muscle differentiation in the DSC cells is higher than a predetermined threshold, When the expression level of the gene related to smooth muscle differentiation in the DSC cell is lower than a predetermined threshold value, the hair regeneration ability of the DSC cell may be evaluated as being high.
- the predetermined threshold value serving as an evaluation index is not a specific value that is uniquely determined, but for example, the DSC transplanted to each subject in a subject group with increased hair diameter and/or hair density.
- Expression levels of genes associated with smooth muscle differentiation of cells; genes associated with smooth muscle differentiation of DSC cells transplanted into each subject in the subject group in which hair diameter and/or hair density did not increase; may be determined by comparison with the expression level of
- the expression level of a gene related to smooth muscle differentiation of DSC cells to be measured normalized (standardized) by the expression level of an arbitrary housekeeping gene is When the expression level of genes related to smooth muscle differentiation of DSC cells in the sample group is lower than the average (for example, 0.9 times or less, 0.8 times or less, 0.7 times or less, 0.6 times or less) , 0.5 times or less, 0.4 times or less, 0.3 times or less, 0.2 times or less, 0.1 times or less, or 0.05 times or less) may be evaluated as having high hair regeneration ability.
- if high for example, 1.1 times or more, 1.2 times or more, 1.3 times or more, 1.4 times or more, 1.5 times or more, 1.6 times or more, 1.7 times or more, 1. (8 times or more, 1.9 times or more, 2.0 times or more, or 2.5 times or more) may be evaluated as having low hair regeneration ability.
- the hair regeneration ability of DSC cells may be evaluated by the hair regeneration ability of each DSC cell, or the hair regeneration ability of the entire cell group including a plurality of DSC cells may be evaluated.
- the hair regeneration ability of the entire cell group containing multiple DSC cells is determined by the hair regeneration ability of DSC cells included in that cell group that low express genes related to smooth muscle differentiation (e.g. The evaluation may be made by measuring the percentage of DSC cells in which the gene expression level is below a predetermined threshold.
- the present invention provides a composition for regenerating hair that contains hair bulb root sheath (DSC) cells that have low expression of genes associated with smooth muscle differentiation.
- DSC hair bulb root sheath
- the DSC cells that lowly express genes related to smooth muscle differentiation applied to the present invention are DSC cells whose expression level of genes related to smooth muscle differentiation is lower than a predetermined threshold.
- the predetermined threshold value is not uniquely determined, for example, the smooth muscle of the DSC cells transplanted to each subject in a subject group with increased hair diameter and/or hair density.
- the expression level of a gene associated with smooth muscle differentiation of DSC cells contained in the composition of the present invention may be lower than the level of expression of a gene associated with smooth muscle differentiation of DSC cells in a subject group in which hair diameter and/or hair density did not increase.
- DSC cells are For example, selected or concentrated to contain 10% or more (e.g., 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95% or 99% or more). Good too.
- the present invention provides a method for producing a composition for hair regeneration comprising hair bulb root sheath (DSC) cells, comprising: Provided is a method comprising the step of selecting or enriching DSC cells that express genes associated with smooth muscle differentiation at low levels from a cell group containing DSC cells.
- DSC hair bulb root sheath
- Methods for selecting or enriching DSC cells that lowly express genes related to smooth muscle differentiation can be carried out by known methods, such as flow cytometry (FACS) or magnetic cell separation (MACS). ), desired DSC cells can be selected or enriched.
- FACS flow cytometry
- MCS magnetic cell separation
- DSC cells that can be used in the present invention can be obtained using known methods (for example, Autologous cell-based therapy for male and female pattern hair loss using dermal sheath cup cells: A randomized placebo-controlled double-blinded dose-finding clinical study. Tsuboi R , Niiyama S, Irisawa R, Harada K, Nakazawa Y, Kishimoto J. J Am Acad Dermatol. 2020 Jul;83(1):109-116.). A composition with high hair regeneration ability can be produced by selecting or concentrating DSC cells that lowly express genes related to smooth muscle differentiation from the thus obtained cell group containing DSC cells. .
- the DSC cells selected or enriched by the production method of the present invention may be DSC cells whose expression level of a gene related to smooth muscle differentiation is lower than a predetermined threshold.
- the predetermined threshold value is not uniquely determined, for example, the smooth muscle of the DSC cells transplanted to each subject in a subject group with increased hair diameter and/or hair density.
- the expression level of a gene related to smooth muscle differentiation of DSC cells contained in the composition produced by the production method of the present invention is determined by lower than the average expression level of genes associated with smooth muscle differentiation (e.g., 0.9 times or less, 0.8 times or less, 0.7 times or less, 0.6 times or less, 0.5 times or less, cells, including DSC cells, included in the composition of the present invention.
- such DSC cells are present in at least 10% (e.g., at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95% or 99%). ) may be included.
- the predetermined threshold value may be the expression level of a gene related to smooth muscle differentiation in the entire cell group including DSC cells before implementing the method. Therefore, by the production method of the present invention, the percentage of DSC cells with lower expression levels of genes related to smooth muscle differentiation than before the method is implemented (for example, 10%, 20%, 30%, 40%). , 50%, 60%, 70%, 80%, 90%, 95% or 99% or more).
- Method 1-1 Preparation of DSC cells Tsuboi et al. (Autologous cell-based therapy for male and female pattern hair loss using dermal sheath cup cells: A randomized placebo-controlled double-blinded dose-finding clinical study. Tsuboi R, Niiyama S, Irisawa R, DSC cells were prepared according to the method described in Harada K, Nakazawa Y, Kishimoto J. J Am Acad Dermatol. 2020 Jul;83(1):109-116.).
- the gene expression levels of the DSC cells obtained by expanding the DSC cells that were not present were measured, and the treatment results (cumulative hair diameter (3 months, 6 months, 9 months, 12 months), total hair density (3 months), The correlation with the scores of 2 months, 6 months, 9 months, 12 months), vs. placebo (no DSC cell transplantation), vs. 0 months) was analyzed.
- the cells were divided into two groups (D)), and the expression levels of SRF and CALD1 in the DSC cells used for treatment in each group were examined to determine whether there were any differences between the groups.
- the results showed that the expression of SRF and CALD1 was significantly lower in the DSC cells of the subject group with high efficacy (FIG. 4).
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Abstract
Description
[2] 前記平滑筋の分化に関連する遺伝子が、平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子及び平滑筋の分化マーカー遺伝子からなる群から1又は複数選択される遺伝子である、項目1に記載の方法。
[3] 前記平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子が、SRF遺伝子、MYOCD遺伝子及びMRTFA遺伝子からなる群から1又は複数選択される遺伝子である、項目2に記載の方法。
[4] 前記平滑筋の分化マーカー遺伝子が、CALD-1遺伝子及びACTA2遺伝子からなる群から1又は複数選択される遺伝子である、項目2又は3に記載の方法。
[5] 前記DSC細胞における前記平滑筋の分化に関連する遺伝子の発現レベルが、所定の閾値より高い場合に、前記DSC細胞の毛髪再生能が低いと評価し、
前記DSC細胞における前記平滑筋の分化に関連する遺伝子の発現レベルが所定の閾値より低い場合に、前記DSC細胞の毛髪再生能が高いと評価する、項目1~4のいずれか1項に記載の方法。
[6] 前記毛髪再生能が、毛髪径及び/又は毛髪密度によって評価される、項目1~5のいずれか1項に記載の方法。
[7] 前記所定の閾値が、
毛髪径及び/又は毛髪密度が増加した被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと;
毛髪径及び/又は毛髪密度が増加しなかった被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと
の比較によって決定される閾値である、項目5に記載の方法。
[9] 前記平滑筋の分化に関連する遺伝子が、平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子及び平滑筋の分化マーカー遺伝子からなる群から1又は複数選択される遺伝子である、項目8に記載の組成物。
[10] 前記平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子が、SRF遺伝子、MYOCD遺伝子及びMRTFA遺伝子からなる群から1又は複数選択される遺伝子である、項目9に記載の組成物。
[11] 前記平滑筋の分化マーカー遺伝子が、CALD-1遺伝子及びACTA2遺伝子からなる群から1又は複数選択される遺伝子である、項目9又は10に記載の組成物。
[12] 前記平滑筋の分化に関連する遺伝子を低発現するDSC細胞が、所定の閾値より前記平滑筋の分化に関連する遺伝子の発現レベルが低いDSC細胞である、項目8~11のいずれか1項に記載に記載の組成物。
[13] 毛髪径及び/又は毛髪密度が増加することを特徴とする、項目8~12のいずれか1項に記載の組成物。
[14] 前記所定の閾値が、
毛髪径及び/又は毛髪密度が増加した被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと;
毛髪径及び/又は毛髪密度が増加しなかった被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと
の比較によって決定される閾値である、項目12に記載の組成物。
DSC細胞を含む細胞群から、平滑筋の分化に関連する遺伝子を低発現するDSC細胞を選択又は濃縮する工程、
を含む、方法。
[16] 前記平滑筋の分化に関連する遺伝子が、平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子及び平滑筋の分化マーカー遺伝子からなる群から1又は複数選択される遺伝子である、項目15に記載の方法。
[17] 前記平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子が、SRF遺伝子、MYOCD遺伝子及びMRTFA遺伝子からなる群から1又は複数選択される遺伝子である、項目16に記載の方法。
[18] 前記平滑筋の分化マーカー遺伝子が、CALD-1遺伝子及びACTA2遺伝子からなる群から1又は複数選択される遺伝子である、項目16又は17に記載の方法。
[19] 前記細胞群から、前記平滑筋の分化に関連する遺伝子の発現レベルが所定の閾値より低いDSC細胞を選択又は濃縮する、項目15~18のいずれか1項に記載の方法。
[20] 前記組成物が、毛髪径及び/又は毛髪密度を高めることを特徴とする、項目15~19のいずれか1項に記載の方法。
[21] 前記所定の閾値が、
毛髪径及び/又は毛髪密度が増加した被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと;
毛髪径及び/又は毛髪密度が増加しなかった被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと
の比較によって決定される閾値である、項目19に記載の方法。
[22] 前記所定の閾値が、前記方法を実施する前のDSC細胞を含む細胞群全体の平滑筋の分化に関連する遺伝子の発現レベルである、項目19に記載の方法。
前記DSC細胞における前記平滑筋の分化に関連する遺伝子の発現レベル所定の閾値より低い場合に、前記DSC細胞の毛髪再生能が高いと評価するものであってもよい。
DSC細胞を含む細胞群から、平滑筋の分化に関連する遺伝子を低発現するDSC細胞を選択又は濃縮する工程、を含む方法を提供する。
1-1.DSC細胞の調製
Tsuboiらの文献(Autologous cell-based therapy for male and female pattern hair loss using dermal sheath cup cells: A randomized placebo-controlled double-blinded dose-finding clinical study. Tsuboi R, Niiyama S, Irisawa R, Harada K, Nakazawa Y, Kishimoto J. J Am Acad Dermatol. 2020 Jul;83(1):109-116.)に記載の方法に従って、DSC細胞を調製した。
本実施例では、Tsuboiらの文献(Autologous cell-based therapy for male and female pattern hair loss using dermal sheath cup cells: A randomized placebo-controlled double-blinded dose-finding clinical study. Tsuboi R, Niiyama S, Irisawa R, Harada K, Nakazawa Y, Kishimoto J. J Am Acad Dermatol. 2020 Jul;83(1):109-116.)で評価した被検体から採取されたDSC細胞のうち、移植に用いられなかったものを拡大培養して得られたDSC細胞について遺伝子発現量を測定し、治療成績(積算毛髪径(3か月、6か月、9か月、12か月)、総毛髪密度(3か月、6か月、9か月、12か月)、対プラセボ(DSC細胞移植無し)、対0か月)のスコアとの相関性を解析した。
それぞれのDSC細胞を1×105個を10%FBS含有DMEM培地(GIBCO)で6ウェルプレート(Corning)に播種し(n=3)、2日間培養した。得られた細胞から、QIAcubeおよびRNeasy MINI QIAcube Kit(QIAGEN)を用いて製品のマニュアルに従いRNAを抽出し、さらにHigh Capacity cDNA Reverse Transcription Kit(Applied Biosystems)を用いて製品のマニュアルに従いcDNAを調製した。
LightCycler(登録商標)およびLightCycler(登録商標) 480 SYBR Green I Master(Roche)を製品のマニュアルに従って用い、定量的PCRを実施した。使用したプライマー対の各塩基配列(5’末端→3’末端)を次表に示す。各種遺伝子の発現量は、ハウスキーピング遺伝子としてGAPDHの発現量により正規化した。
32名の被検体由来のDSC細胞の遺伝子発現を定量的PCRにより測定した。各被検体の総毛髪密度または積算毛髪径のスコアと、DSC細胞の各種遺伝子発現量との相関係数を算出した。相関係数の絶対値が0.3より大きい場合、または-0.3より小さい場合にそれぞれ、非常に弱い相関、非常の弱い逆相関があると判定し、相関係数の絶対値が0.5より大きい場合、または-0.5より小さい場合にそれぞれ、相関、逆相関があると判定した。
Claims (22)
- 平滑筋の分化に関連する遺伝子の発現レベルを指標とする、毛球部毛根鞘(DSC)細胞の毛髪再生能を評価する方法。
- 前記平滑筋の分化に関連する遺伝子が、平滑筋の分化マーカー遺伝子の発現を制御する因子及び平滑筋の分化マーカー遺伝子からなる群から1又は複数選択される遺伝子である、請求項1に記載の方法。
- 前記平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子が、SRF遺伝子、MYOCD遺伝子及びMRTFA遺伝子からなる群から1又は複数選択される遺伝子である、請求項2に記載の方法。
- 前記平滑筋の分化マーカー遺伝子が、CALD-1遺伝子及びACTA2遺伝子からなる群から1又は複数選択される遺伝子である、請求項2又は3に記載の方法。
- 前記DSC細胞における前記平滑筋の分化に関連する遺伝子の発現レベルが、所定の閾値より高い場合に、前記DSC細胞の毛髪再生能が低いと評価し、
前記DSC細胞における前記平滑筋の分化に関連する遺伝子の発現レベルが所定の閾値より低い場合に、前記DSC細胞の毛髪再生能が高いと評価する、請求項1又は2に記載の方法。 - 前記毛髪再生能が、毛髪径及び/又は毛髪密度によって評価される、請求項1又は2に記載の方法。
- 前記所定の閾値が、
毛髪径及び/又は毛髪密度が増加した被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと;
毛髪径及び/又は毛髪密度が増加しなかった被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと
の比較によって決定される閾値である、請求項5に記載の方法。 - 平滑筋の分化に関連する遺伝子を低発現する毛球部毛根鞘(DSC)細胞を含有する、毛髪を再生するための組成物。
- 前記平滑筋の分化に関連する遺伝子が、平滑筋の分化マーカー遺伝子の発現を制御する因子及び平滑筋の分化マーカー遺伝子からなる群から1又は複数選択される遺伝子である、請求項8に記載の組成物。
- 前記平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子が、SRF遺伝子、MYOCD遺伝子及びMRTFA遺伝子からなる群から1又は複数選択される遺伝子である、請求項9に記載の組成物。
- 前記平滑筋の分化マーカー遺伝子が、CALD-1遺伝子及びACTA2遺伝子からなる群から1又は複数選択される遺伝子である、請求項9又は10に記載の組成物。
- 前記平滑筋の分化に関連する遺伝子を低発現するDSC細胞が、所定の閾値より前記平滑筋の分化に関連する遺伝子の発現レベルが低いDSC細胞である、請求項8又は9に記載に記載の組成物。
- 毛髪径及び/又は毛髪密度が増加することを特徴とする、請求項8又は9に記載の組成物。
- 前記所定の閾値が、
毛髪径及び/又は毛髪密度が増加した被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと;
毛髪径及び/又は毛髪密度が増加しなかった被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと
の比較によって決定される閾値である、請求項12に記載の組成物。 - 毛球部毛根鞘(DSC)細胞を含む、毛髪を再生するための組成物の製造方法であって、
DSC細胞を含む細胞群から、平滑筋の分化に関連する遺伝子を低発現するDSC細胞を選択又は濃縮する工程、
を含む、方法。 - 前記平滑筋の分化に関連する遺伝子が、平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子及び平滑筋の分化マーカー遺伝子からなる群から1又は複数選択される遺伝子である、請求項15に記載の方法。
- 前記平滑筋の分化マーカー遺伝子の発現を制御する因子の遺伝子が、SRF遺伝子、MYOCD遺伝子及びMRTFA遺伝子からなる群から1又は複数選択される遺伝子である、請求項16に記載の方法。
- 前記平滑筋の分化マーカー遺伝子が、CALD-1遺伝子及びACTA2遺伝子からなる群から1又は複数選択される遺伝子である、請求項16又は17に記載の方法。
- 前記細胞群から、前記平滑筋の分化に関連する遺伝子の発現レベルが所定の閾値より低いDSC細胞を選択又は濃縮する、請求項15又は16に記載の方法。
- 前記組成物が、毛髪径及び/又は毛髪密度を高めることを特徴とする、請求項15又は16に記載の方法。
- 前記所定の閾値が、
毛髪径及び/又は毛髪密度が増加した被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと;
毛髪径及び/又は毛髪密度が増加しなかった被検体群におけるそれぞれの被検体に移植されたDSC細胞の平滑筋の分化に関連する遺伝子の発現レベルと
の比較によって決定される閾値である、請求項19に記載の方法。 - 前記所定の閾値が、前記方法を実施する前のDSC細胞を含む細胞群全体の平滑筋の分化に関連する遺伝子の発現レベルである、請求項19に記載の方法。
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| JP2021083430A (ja) * | 2019-11-29 | 2021-06-03 | 株式会社 資生堂 | 毛球部毛根鞘細胞の遊走評価方法 |
| WO2022191149A1 (ja) * | 2021-03-10 | 2022-09-15 | 株式会社 資生堂 | 毛包再生能を有する細胞の同定方法、及び毛包を再生するための組成物の評価方法 |
| JP2022182154A (ja) * | 2021-05-27 | 2022-12-08 | 株式会社 資生堂 | 毛球部毛根鞘細胞の評価方法 |
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