WO2023210401A1 - 皮膚のリンパ管に基づき肌状態を決定する方法 - Google Patents
皮膚のリンパ管に基づき肌状態を決定する方法 Download PDFInfo
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- WO2023210401A1 WO2023210401A1 PCT/JP2023/015121 JP2023015121W WO2023210401A1 WO 2023210401 A1 WO2023210401 A1 WO 2023210401A1 JP 2023015121 W JP2023015121 W JP 2023015121W WO 2023210401 A1 WO2023210401 A1 WO 2023210401A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Instruments for taking body samples for diagnostic purposes; Other methods or instruments for diagnosis, e.g. for vaccination diagnosis, sex determination or ovulation-period determination; Throat striking implements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/13—Tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
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- 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
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- 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
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
Definitions
- the present invention relates to a method for determining skin condition using the relationship between the structure and/or form of skin lymph vessels and skin condition, a method for predicting skin lymph vessel structure, and a method for screening skin condition improving drugs.
- a circulatory system consisting of a vascular system and a lymphatic system runs throughout the living body.
- Blood vessels are responsible for maintaining body temperature and supplying nutrients and oxygen to tissues throughout the body, while lymphatic vessels are responsible for transporting immune cells and collecting excess tissue fluid and foreign substances.
- the lymphatic system is composed of lymph capillaries present in peripheral areas, collecting lymph vessels formed by aggregation of lymph capillaries, and lymph nodes located throughout the body. The collecting lymph vessels eventually converge into the thoracic duct or right lymph trunk, which connects to the veins.
- Lymphatic capillaries have closed, blind ends and are composed of a single layer of squamous epithelial cells.
- lymph capillaries Compared to capillaries, lymph capillaries have looser connections between endothelial cells and larger intercellular spaces, and can collect large proteins and foreign substances that cannot be collected in blood vessels. When the function of lymph vessels is inhibited for some reason, tissue fluid accumulates in peripheral tissues, causing swelling and edema.
- Lymphedema is a disease in which swelling occurs due to local lymph fluid increase and/or poor collection. Lymph that seeps into the tissues is collected by the lymph vessels, but it is not collected and accumulates in the limbs, causing swelling. Lymphedema has many causes, but it often occurs after cancer surgery or radiation therapy. When lymphedema occurs, it worsens its appearance and impairs motor function. In addition, due to poor lymph flow, inflammation that occurs at the wound site can spread to the entire limb, resulting in cellulitis. It has also been reported that abnormal proliferation of keratinocytes and condensation of dermal collagen occur in affected areas with lymphedema (Non-Patent Document 1: Emerg Infect Dis. 2004 Nov; 10(11): 1938-1946).
- Non-Patent Document 2 Surg Radiol Anat 13 (3):221-226. doi:10.1007/ BF01627990. It has been reported that administration of estrogen improves or prevents swelling and lymphedema (Patent Document 1: Japanese Patent Application Laid-Open No. 2013-071913).
- the purpose of the present invention is to elucidate the relationship between skin lymph vessels and lymphedema, as well as the relationship between skin lymph vessels and the skin, by clarifying the characteristics of skin lymph vessels that cause lymphedema. , thereby providing a method for evaluating lymphedema and further skin conditions.
- the present inventors focused on the structure and morphology of lymphatic vessels in the skin of patients with lymphedema, and performed three-dimensional visualization and analysis of the structure of lymphatic vessels in the skin extracted from patients with lymphedema. It has been found that the structure and morphology of lymph vessels in the skin change depending on the severity (types 1 to 4) of skin cancer, and the properties of the lymph vessels change accordingly. Furthermore, when we three-dimensionally visualized and analyzed the lymphatic structure of the skin in healthy people of different ages, we found that the morphology of lymphatic vessels changes with age.
- the invention therefore relates to: [1] A method for determining a skin condition, or a method for determining or providing a cosmetic treatment, based on parameters related to the structure and/or morphology of lymphatic vessels in the skin. [2] The method according to item 1, wherein the parameter regarding the morphology of lymph vessels in the skin is determined by at least one selected from the group consisting of volume, number of branches, and diameter of lymph vessels. [3] The method according to item 2, wherein when the parameter related to the morphology of lymph vessels in the skin is the diameter of lymph vessels, it is determined that the skin condition is worsening due to a change in the diameter of lymph vessels.
- the screening method according to item 12 comprising: [14] The method according to item 13, wherein the skin is cultured skin containing lymphatic structure. [15] A step of culturing lymphatic endothelial cells in a medium containing a candidate drug; A step of measuring VE-cadherin expression in lymphatic endothelial cells after culture; Comparing the expression level of VE-cadherin with a control; The screening method according to item 12, comprising the step of selecting a candidate drug as a skin condition improving drug based on changes in VE-cadherin expression. [16] A drug for improving skin condition, including an agent for increasing the diameter of skin lymph vessels.
- the present invention it is possible to determine the skin condition, especially lymphedema, based on the structure and/or morphology of lymph vessels in the skin.
- FIG. 1A shows three-dimensional images of lymph vessels in normal skin (normal) and skin of lymphedema patients (types 1 to 4).
- FIG. 1B shows the results of measuring the volume of lymph vessels from a three-dimensional image of lymph vessels.
- FIG. 1C shows the results of measuring the diameter of a lymphatic vessel from a three-dimensional image of the lymphatic vessel.
- FIG. 1D shows the results of measuring the number of branches of lymph vessels from a three-dimensional image of lymph vessels.
- FIG. 2 shows the results of fluorescence staining and photographing of VE-cadherin in normal skin (normal) and skin of lymphedema patients (type 2, type 4).
- FIG. 1A shows three-dimensional images of lymph vessels in normal skin (normal) and skin of lymphedema patients (types 1 to 4).
- FIG. 1B shows the results of measuring the volume of lymph vessels from a three-dimensional image of lymph vessels.
- FIG. 1C shows the results of measuring the diameter of a lymphatic vessel from a three-dimensional
- FIG. 3A shows three-dimensional images of lymph vessels in the cheek skin of a person in their 20s and the cheek skin of a person in their 60s.
- FIG. 3B shows the results of measuring the volume of lymph vessels from three-dimensional images of lymph vessels in young people (26 to 45 years old) and middle-aged people (46 to 67 years old).
- FIG. 3C shows the results of measuring the diameter of lymph vessels from three-dimensional images of lymph vessels in young people (26 to 45 years old) and middle-aged people (46 to 67 years old).
- Figure 3D shows the results of measuring the number of lymphatic vessel branches from three-dimensional images of lymphatic vessels in young people (26 to 45 years old) and middle-aged people (46 to 67 years old).
- Figure 4 shows the intensity of R-CHP measured in stained photographs obtained by R-CHP/Hoechst staining on normal skin (normal) and skin of lymphedema patients (type 1 + type 2, type 3 + type 4). The results are shown below.
- the present invention relates to a method for determining skin condition based on parameters related to the structure and/or morphology of skin lymph vessels.
- Skin lymph vessels can be observed by performing known observation techniques on the skin.
- Techniques for observing lymph vessels include scintigraphy, indocyanine green fluorescence angiography (ICG), redundant skin staining, optical coherence tomography, and optical ultrasound imaging.
- Microscopic lymph vessels that exist in the dermis of the skin are particularly called lymph capillaries, and can be observed using these techniques.
- lymphedema Although scintigraphy is an established method for diagnosing lymphedema and is capable of visualizing lymph fluid and its flow in living organisms, the use of isotopes as contrast media places a heavy burden on patients.
- the ICG contrast method has also been established as a method for diagnosing lymphedema, and lymph fluid and its flow can be visualized by subcutaneously injecting indocyanine green.
- these methods for labeling lymph fluid can visualize relatively large collecting lymph vessels and determine the transport capacity of lymph vessels, the lymph fluid exudates into the tissue, making it possible to visualize relatively large collecting lymph vessels. There is a problem in that the background of lymphatic capillaries in the peripheral region becomes high.
- a skin sample can be fluorescently labeled specifically in lymph vessels by using an anti-podoplanin antibody as a primary antibody and a fluorescently labeled secondary antibody. By making it transparent using a transparentizing reagent, observation using a light sheet microscope becomes possible (Patent Document 3: International Publication No. 2018/030520).
- Optical coherence tomography is a method that uses coherent near-infrared broadband light to image a vertical cross section of the measurement target as a backscattered intensity distribution, and obtains a three-dimensional image of the microstructure of the skin.
- Non-patent document 3 Sci Rep. 2016 Feb 19;6:21122. doi: 10.1038/srep21122.
- Photo-ultrasonic imaging uses an ultrasonic sensor to receive ultrasonic waves emitted by tissues that have absorbed pulsed light emitted from a laser, and can obtain three-dimensional images in real time by performing parallel signal processing on the received signals.
- Non-patent document 4 F1000Res. 2018; 7: 1813. doi: 10.12688/f1000research.16743.2
- Lymph vessels in the dermis can be analyzed in terms of volume, diameter, and number of branches.
- the volume of lymph vessels relates to the proportion of lymph vessels in the dermis to a unit volume.
- the diameter of a lymphatic vessel can be expressed as the average diameter calculated by calculating the diameter over the entire length of a lymphatic vessel in the dermis.
- the number of branches of a lymphatic vessel can be expressed as the number of branches included in a unit volume.
- the volume, diameter, and number of branches can be appropriately determined for a three-dimensionally constructed lymphatic vessel by computer processing.
- Imaris3D/4D image analysis software Zeiss
- Zeiss Imaris3D/4D image analysis software
- Parameters related to the morphology of lymphatic vessels in the skin can be determined by at least one selected from the group consisting of volume, diameter, and number of branches of lymphatic vessels.
- the volume, diameter, and number of branches may each be used as parameters related to the morphology.
- a new parameter may be derived by combining at least two parameters among volume, number of branches, and diameter.
- the diameter threshold can be set to, for example, 40 ⁇ m or 35 ⁇ m, and lymphedema can be determined when the diameter is lower than the threshold.
- the volume threshold can be set to, for example, 2.5% or 2.0%, and lymphedema can be determined when the volume is lower than the threshold.
- lymphedema can also be determined by further taking into account the number of branches of lymphatic vessels in the skin. As an example, if the diameter and/or volume of cutaneous lymph vessels decreases while the number of branches of cutaneous lymph vessels increases, this indicates that the cutaneous lymph vessels have become thinner and have more branches. This shows that lymphedema can be determined in its early stages.
- a decrease in the diameter and/or volume of the skin lymph vessels, as well as a decrease in the number of branches of the skin lymph vessels, indicates that the lymph vessels have degenerated, leading to lymphedema and further skin conditions.
- Deterioration ie, advanced lymphedema, can be determined.
- lymphedema increases the thickness of the epidermis, including the stratum corneum (Non-Patent Document 1). Further, as lymphedema worsens, collagen production increases and degeneration occurs in the dermis ( Figure 4). Then, worsening of lymphedema is also associated with worsening of skin condition. Thereby, the skin condition can also be determined by determining the severity of lymphedema. Therefore, the skin condition can be determined based on parameters related to the structure and/or morphology of skin lymph vessels. More specifically, changes in the volume, diameter, or number of branches of skin lymph vessels can be associated with deterioration of skin condition. It can be determined that the skin condition is worsening if the volume and/or diameter decreases. Furthermore, the skin condition can also be determined by further taking into account the number of branches of lymphatic vessels in the skin.
- the morphology of skin lymph vessels also changes depending on age (Figure 3A). There is a tendency for the volume of lymph vessels to decrease with age (Figure 3B). Furthermore, in young people, the diameter of lymph vessels in the skin is large and the number of branches is small, while in middle-aged and elderly people, the diameter of lymph vessels is small and the number of branches is large (FIGS. 3C and D). Since skin conditions worsen with age, lymphatic vessel morphology has been shown to be related to skin conditions even in normal skin. Therefore, the morphology of lymph vessels in the skin is not only an indicator of the degree of deterioration of the pathological condition of lymphedema, but also an indicator of the deterioration of normal skin.
- the diameter threshold can be set to, for example, 35 ⁇ m or 30 m, and if the diameter is lower than the threshold, it can be determined that the skin condition is worsening.
- the volume threshold can be set as appropriate, and for example, 2.5% or 2.0% can be used. If it is lower than such a threshold, it can be determined that the skin condition is deteriorating.
- the skin condition can also be determined by further taking into account the number of branches of lymphatic vessels in the skin. As an example, if the diameter and/or volume of cutaneous lymph vessels decreases while the number of branches of cutaneous lymph vessels increases, this indicates that the cutaneous lymph vessels have become thinner and have more branches. Shows and allows you to determine your skin condition. Determination of skin condition is done for cosmetic purposes.
- Cosmetic treatments can be provided to maintain the health of the lymphatic vessels when it is determined that the lymphatic vessels have become narrower, have decreased volume, and/or have an increased number of branches.
- Such cosmetic treatments may include skin massage and presentation of appropriate cosmetics such as skin condition improving agents.
- another aspect of the invention also relates to a method for determining or providing a cosmetic treatment based on parameters relating to the structure and/or morphology of lymphatic vessels in the skin.
- the skin condition improving agent provided is preferably a skin condition improving agent screened by the screening method of the present invention.
- VE-cadherin in the cutaneous lymph vessels can be mentioned as a parameter related to the structure of the cutaneous lymph vessels.
- the expression level of VE-cadherin in skin lymph vessels increases ( Figure 2). Therefore, the expression level of VE-cadherin in the lymphatic vessels of the skin can be correlated with the severity of lymphedema.
- the expression level of VE-cadherin can be observed by staining a skin sample and using a fluorescence microscope using an anti-VE-cadherin antibody and a fluorescently labeled secondary antibody.
- VE-cadherin is present in both lymph vessels and blood vessels, so in order to distinguish between lymph vessels and blood vessels, co-staining with podoplanin, which is specifically expressed in lymph vessels, may be performed, or it may be possible to distinguish between lymph vessels and blood vessels based on the structure of the vessels. It may also be distinguished from lymph vessels.
- the measurement may be performed by isolating lymph vessels from a skin sample and measuring the protein amount or mRNA amount of the isolated lymph vessels. The amount of protein or mRNA can be measured based on conventional methods, such as Western blotting or quantitative PCR. It has been shown that as lymphedema worsens, the expression level of VE-cadherin in skin lymph vessels increases.
- VE-cadherin is a protein with a molecular weight of about 140 kDa, also called cadherin-5 or CD144, and belongs to the cadherin superfamily. VE-cadherin is specific to endothelial cells, is expressed in lymphatic endothelial cells and vascular endothelial cells, and is present in cell membranes (Patent Document 2: International Publication No. 2019/097958). VE-cadherin molecules are known to be involved in the permeability of vascular and lymphatic endothelium. Without intending to be limited by theory, increased expression of VE-cadherin may increase adhesion between lymphatic endothelial cells and inhibit lymph fluid collection.
- Another aspect of the present invention may relate to a method of predicting the lymphatic structure of the skin from the skin condition based on the relationship between parameters based on the structure and/or morphology of the lymphatic vessels of the skin and the skin condition.
- the lymphatic structure of the skin can be predicted, and thereby the progression of swelling and edema can be predicted.
- the present invention also relates to a method for screening skin condition improving drugs using parameters related to the morphology of skin lymph vessels as an index. More specifically, the screening method of the present invention includes the following steps: adding a candidate drug to the skin; a step of photographing the morphology of lymph vessels in the skin after addition; calculating parameters regarding the morphology of lymph vessels based on the captured images; a step of comparing parameters regarding the morphology of lymph vessels in the skin before addition of the candidate drug or in a control drug addition group; and a step of selecting the candidate drug as a skin condition improving drug based on the change in the parameter. including.
- candidate drugs can be screened as skin condition improving agents.
- the volume, number of branches, and/or diameter of lymph vessels can be used as parameters regarding the morphology of lymph vessels in the skin.
- the candidate agent may be repeatedly added to the skin over a period of time during which changes in parameters related to lymphatic vessel morphology occur.
- the control drug added group may differ only in that no candidate drug is added.
- the skin used in the screening method of the present invention may be cultured skin containing lymphatic structure, cultured tissue of surplus skin, animal skin, or skin of a living human body.
- the invention also relates to a method for screening skin condition improving drugs based on VE-cadherin expression in skin lymphatic cells. More specifically, the screening method of the present invention is as follows: adding a candidate drug to the skin; measuring VE-cadherin expression in skin lymphatic cells after addition; a step of comparing the expression of VE-cadherin in the skin lymph vessels before addition of the candidate drug or a control drug addition group; and a step of selecting the candidate drug as a skin condition improving drug based on the change in VE-cadherin expression. including.
- candidate drugs capable of suppressing VE-cadherin expression in skin lymph vessels can be screened as skin condition improving agents.
- the control drug added group may differ only in that no candidate drug is added.
- the skin used in the screening method of the present invention may be cultured skin containing lymphatic structure, cultured tissue of surplus skin, or animal skin.
- the screening method may be performed on cultures of lymphatic cells. Specifically: culturing lymphatic vessel cells in a medium containing a candidate drug; measuring VE-cadherin expression in lymphatic cells after culture; The method includes a step of comparing the expression level of VE-cadherin with a control, and a step of selecting a candidate drug as a skin condition improving drug based on the change in VE-cadherin expression.
- the lymphatic cells may be cultured alone or in combination with other cells, and the control may be a group that differs only in the absence of the candidate agent or the candidate agent. It may be a group before drug addition. For example, it may be cultured as a skin culture.
- Candidate drugs capable of suppressing VE-cadherin expression in lymphatic cells can be screened as skin condition improving agents. Lymphatic cells are especially lymphatic endothelial cells.
- any drug included in any library can be used.
- a known cosmetic material library or pharmaceutical library may be used.
- These libraries may be compound libraries or extract libraries.
- the skin condition improving agent refers to a drug that can improve the general properties of the skin, particularly the skin conditions related to lymphedema or swelling.
- the skin condition improving agent may be incorporated into cosmetics, pharmaceuticals, or quasi-drugs, or may be incorporated into foods, such as nutritional supplements such as supplements.
- improving the expression of VE-cadherin and the function of lymphatic vessels in the skin can improve skin conditions, particularly swelling or lymphedema. Therefore, the skin condition improving agent can also be referred to as an agent for treating, preventing or improving swelling or lymphedema, and can also be referred to as an agent for increasing the diameter and/or volume of lymph vessels.
- the skin condition improving agent can be administered by any route such as transdermally, mucosally, orally, subcutaneously, or intramuscularly, but transdermal administration is preferred from the viewpoint of acting on the lymphatic vessels directly under the skin.
- Example 1 Analysis of lymph vessels in skin samples from lymphedema patients Surgical surplus skin and normal lower branches of lower limb lymphedema patients whose severity of lymphedema (types 1 to 4) was determined using lymphoscintigraphy Skin samples were provided by Chiba University Hospital. Informed consent was obtained from each patient for the use of excess skin in experiments.
- the excess skin tissue of the lower limbs was heat treated (60°C, 1 minute) to peel off the epidermis and fixed overnight with 4% paraformaldehyde (PFA)/physiological saline (PBS). PFA-fixed skin tissue was permeabilized overnight with 2% Triton-X100/PBS, and then blocked overnight with 5% donkey serum/PBS. Thereafter, it was incubated for 3 days with anti-podoplanin antibody (Dako Cytomation, #M3619)/5% donkey serum/PBS as the primary antibody, washed with PBS, and Alexa647-labeled anti-mouse (H+L) antibody (Invitrogen)/as the secondary antibody.
- PFA paraformaldehyde
- PBS physiological saline
- Heat treatment 60°C, 1 minute was applied to the excess skin tissue of the lower limbs to peel off the epidermis, which was fixed overnight in 4% paraformaldehyde (PFA)/physiological saline (PBS).
- PFA paraformaldehyde
- PBS physiological saline
- the PFA-fixed skin tissue was defatted using CUBIC-L (Wako) at 37°C for one week, and then blocked overnight with 5% donkey serum/PBS. Thereafter, it was incubated for 3 days with anti-VE-cadherin antibody (Cell signaling, #2500)/5% donkey serum/PBS as the primary antibody, washed, and Alexa568-labeled anti-rabbit (H+L) antibody (Invitrogen) as the secondary antibody.
- Cell signaling #2500
- H+L Alexa568-labeled anti-rabbit
- Example 2 Age-related changes in lymph vessels in healthy subjects Excess cheek skin of women in their 20s to 60s was treated with Obio, LLC. Obtained from. The excess skin tissue on the cheek was heat treated (60° C., 1 minute) to peel off the epidermis and fixed overnight with 4% paraformaldehyde (PFA)/physiological saline (PBS). PFA-fixed skin tissue was permeabilized overnight with 2% Triton-X100/PBS, and then blocked overnight with 5% donkey serum/PBS.
- PFA paraformaldehyde
- PBS physiological saline
- the cells were incubated for 3 days with anti-podoplanin antibody (Dako Cytomation, #M3619)/5% donkey serum/PBS as the primary antibody, washed with PBS, and Alexa647-labeled anti-mouse (H+L) antibody (Invitrogen)/as the secondary antibody. Incubated overnight with 5% donkey serum/PBS.
- the immunostained skin tissue was immersed in a clearing reagent: Rapiclear 1.52 (SunJin Lab Co.) to make it transparent.
- the sample thus obtained was observed under a fluorescence microscope using LSM880 (ZEISS), and a three-dimensional image of the skin lymph vessels was obtained (FIG. 3A).
- the diameter and number of branches of lymph vessels were determined using Imaris3D/4D image analysis software (ZEISS) (FIGS. 3B and 3C).
- ZEISS Imaris3D/4D image analysis software
- the morphology of lymphatic vessels in the skin also changed with age (Fig. 3A).
- Fig. 3B There was a tendency for the volume of lymph vessels to decrease with age (Fig. 3B).
- the diameter of lymph vessels was large and the number of branches was small, while in middle-aged and elderly people, the diameter of lymph vessels was small and the number of branches was large (Fig. 3C and D).
- Example 3 Degeneration of collagen in skin samples derived from lymphedema patients Surgical surplus skin of lower limb lymphedema patients whose lymphedema severity (types 1 to 4) was determined using lymphoscintigraphy, and as a control. Normal lower limb skin samples were provided by Chiba University Hospital. Informed consent was obtained from each patient for the use of excess skin in experiments.
- the skin samples were frozen and frozen sections with a thickness of 50 ⁇ m were obtained.
- the frozen sections were stained for denatured collagen using R-CHP (3Helix Inc.) according to the protocol. Denatured collagen was quantified using the image analysis software Fiji on the stained images (FIG. 4). Exacerbation of lymphedema increased denatured collagen production in the dermis.
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Abstract
Description
そこで本発明は以下に関する:
[1] 皮膚のリンパ管の構造及び/又は形態に関するパラメータに基づき、肌状態を決定する方法、又は美容処置を決定もしくは提供する方法。
[2] 前記皮膚のリンパ管の形態に関するパラメータが、リンパ管の体積、分岐数及び直径からなる群から選ばれる少なくとも1により決定される、項目1に記載の方法。
[3] 前記皮膚のリンパ管の形態に関するパラメータが、リンパ管の直径である場合に、リンパ管直径の変化により、肌状態が悪化していると決定する、項目2に記載の方法。
[4] 前記皮膚のリンパ管の形態に関するパラメータが、さらにリンパ管の分岐数も考慮し、肌状態が悪化していると決定する、項目3に記載の方法。
[5] 前記皮膚のリンパ管の形態が、光干渉断層装置又は光超音波イメージングにより測定される、項目1~4のいずれか一項に記載の方法。
[6] 前記皮膚のリンパ管の構造に関するパラメータが、皮膚のリンパ管におけるVE-カドヘリンの発現量により決定される、項目1~5のいずれか一項に記載の方法。
[7] 皮膚のリンパ管における前記VE-カドヘリンの発現の増加により、肌状態が悪化していると決定する、項目6に記載の方法。
[8] 皮膚のリンパ管の形態に関するパラメータを指標とした、肌状態改善薬のスクリーニング方法。
[9] 候補薬剤を皮膚に添加する工程、
添加後の皮膚のリンパ管の形態を撮影する工程、
撮影された画像に基づき皮膚のリンパ管の形態に関するパラメータを計算する工程、
候補薬剤添加前又は対照薬剤添加群の皮膚における皮膚のリンパ管形態に関するパラメータと比較する工程、そして
パラメータの変化に基づき、候補薬剤を肌状態改善薬として選択する工程、
を含む項目8に記載のスクリーニング方法。
[10] 前記皮膚のリンパ管の形態に関するパラメータが、リンパ管の体積、分岐数及び直径からなる群から選ばれる少なくとも1により決定される、項目9に記載の方法。
[11] 前記皮膚が、リンパ管構造を含む培養皮膚である、項目9又は10に記載の方法。
[12] リンパ管内皮細胞のVE-カドヘリン発現量を指標とした、肌状態改善薬のスクリーニング方法。
[13] 候補薬剤を皮膚に添加する工程、
添加後の皮膚のリンパ管内皮細胞におけるVE-カドヘリン発現を測定する工程、
候補薬剤添加前又は対照薬剤添加群の皮膚のリンパ管内皮細胞におけるVE-カドヘリン発現と比較する工程、そして
VE-カドヘリン発現量の変化に基づき、候補薬剤を肌状態改善薬として選択する工程、
を含む、項目12に記載のスクリーニング方法。
[14] 前記皮膚が、リンパ管構造を含む培養皮膚である、項目13に記載の方法。
[15] 候補薬剤を含む培地中でリンパ管内皮細胞を培養する工程
培養後のリンパ管内皮細胞におけるVE-カドヘリン発現を測定する工程、
対照におけるVE-カドヘリン発現量と比較する工程、
VE-カドヘリン発現変化に基づき、候補薬剤を肌状態改善薬として選択する工程
を含む、項目12に記載のスクリーニング方法。
[16] 皮膚のリンパ管の直径の増大剤を含む、肌状態改善用薬剤。
候補薬剤を皮膚に添加する工程、
添加後の皮膚のリンパ管の形態を撮影する工程、
撮影された画像に基づきリンパ管の形態に関するパラメータを計算する工程、
候補薬剤添加前又は対照薬剤添加群の皮膚のリンパ管の形態に関するパラメータと比較する工程、そして
パラメータの変化に基づき、候補薬剤を肌状態改善薬として選択する工程、
を含む。この方法を行うことにより、候補薬剤を肌状態改善剤としてスクリーニングすることができる。皮膚のリンパ管の形態に関するパラメータは、リンパ管の体積、分岐数及び/又は直径を使用することができる。リンパ管の形態に関するパラメータの変化が生じる期間にわたり、繰り返し候補薬剤を皮膚に添加する工程を行ってもよい。対照薬剤添加群は、候補薬剤が添加されない点でのみ異なっていてもよい。本発明のスクリーニング方法において用いられる皮膚は、リンパ管構造を含む培養皮膚、余剰皮膚の培養組織であってもよいし、動物の皮膚であってもよく、ヒトの生体の皮膚であってもよい
候補薬剤を皮膚に添加する工程、
添加後の皮膚のリンパ管細胞におけるVE-カドヘリン発現を測定する工程、
候補薬剤添加前又は対照薬剤添加群の皮膚のリンパ管におけるVE-カドヘリン発現と比較する工程、そして
VE-カドヘリン発現変化に基づき、候補薬剤を肌状態改善薬として選択する工程、
を含む。この方法を行うことにより、皮膚のリンパ管において、VE-カドヘリン発現を抑制可能な候補薬剤を肌状態改善剤としてスクリーニングすることができる。対照薬剤添加群は、候補薬剤が添加されない点でのみ異なっていてもよい。本発明のスクリーニング方法において用いられる皮膚は、リンパ管構造を含む培養皮膚、余剰皮膚の培養組織であってもよいし、動物の皮膚であってもよい。
具体的には、以下の:
候補薬剤を含む培地中でリンパ管細胞を培養する工程、
培養後のリンパ管細胞におけるVE-カドヘリン発現を測定する工程、
対照におけるVE-カドヘリン発現量と比較する工程、及び
VE-カドヘリン発現変化に基づき、候補薬剤を肌状態改善薬として選択する工程
を含む。リンパ管細胞は、リンパ管細胞単独で培養されてもよいし、他の細胞と合わせて培養されてもよく、対照は、候補薬剤が添加されない点でのみ異なっている群であるか、又は候補薬剤添加前の群であってもよい。例えば皮膚培養物として培養されてもよい。リンパ管細胞においてVE-カドヘリン発現を抑制可能な候補薬剤を肌状態改善剤としてスクリーニングすることができる。リンパ管細胞は、特にリンパ管内皮細胞である。
リンパシンチグラフィを用いてリンパ浮腫の重症度(1型~4型)を判定された下肢リンパ浮腫患者の手術余剰皮膚及び正常の下枝皮膚試料を千葉大学医学部附属病院より提供を受けた。余剰皮膚を実験に使用することについては各患者からインフォームドコンセントを取得した。
20代~60代女性の頬余剰皮膚をObio, LLC.より入手した。
頬の余剰皮膚組織に熱処理(60℃,1分)を加えて、表皮を剥離し、4%パラホルムアルデヒド(PFA)/生理食塩水(PBS)にて一晩固定した。PFA固定済皮膚組織に対し、2%Triton-X100/PBSで膜透過処理を1晩行い、次いで5%ロバ血清/PBSで一晩ブロッキングした。その後、一次抗体として抗ポドプラニンン抗体(Dako Cytomation, #M3619)/5%ロバ血清/PBSで3日間インキュベートした後、PBSで洗浄し、2次抗体としてAlexa647標識抗マウス(H+L)抗体(Invitrogen)/5%ロバ血清/PBSで一晩インキュベートした。免疫染色した皮膚組織を、透明化試薬:Rapiclear 1.52(SunJin Lab Co.)に浸漬し透明化した。こうして得られた試料を、LSM880(ZEISS)を使用して蛍光顕微鏡観察を行い、皮膚のリンパ管について3次元画像を取得した(図3A)。3次元画像から、リンパ管の直径及び分岐数について、Imaris3D/4D画像解析ソフトウェア(ZEISS)を用いて決定した(図3B及び図3C)。皮膚のリンパ管の形態は、年齢に応じても変化した(図3A)。加齢に伴いリンパ管の体積は減少する傾向が見られた(図3B)。また、若年層では、リンパ管の直径は大きく、かつ分岐数は少ない一方、中高年層ではリンパ管の直径は小さくなり、分岐数が多くなった(図3C及びD)。
リンパシンチグラフィを用いてリンパ浮腫の重症度(1型~4型)を判定された下肢リンパ浮腫患者の手術余剰皮膚、及び対照として、正常の下肢皮膚試料を千葉大学医学部附属病院より提供を受けた。余剰皮膚を実験に使用することについては各患者からインフォームドコンセントを取得した。
Claims (16)
- 皮膚のリンパ管の構造及び/又は形態に関するパラメータに基づき、肌状態を決定する方法。
- 前記皮膚のリンパ管の形態に関するパラメータが、リンパ管の体積、分岐数及び直径からなる群から選ばれる少なくとも1により決定される、請求項1に記載の方法。
- 前記皮膚のリンパ管の形態に関するパラメータが、リンパ管の直径である場合に、リンパ管直径の変化により、肌状態が悪化していると決定する、請求項2に記載の方法。
- 前記皮膚のリンパ管の形態に関するパラメータが、さらにリンパ管の分岐数も考慮し、肌状態が悪化していると決定する、請求項3に記載の方法。
- 前記皮膚のリンパ管の形態が、光干渉断層装置又は光超音波イメージングにより測定される、請求項1~4のいずれか一項に記載の方法。
- 前記皮膚のリンパ管の構造に関するパラメータが、皮膚のリンパ管におけるVE-カドヘリンの発現量により決定される、請求項1に記載の方法。
- 皮膚のリンパ管における前記VE-カドヘリンの発現の増加により、肌状態が悪化していると決定する、請求項6に記載の方法。
- 皮膚のリンパ管の形態に関するパラメータを指標とした、肌状態改善薬のスクリーニング方法。
- 候補薬剤を皮膚に添加する工程、
添加後の皮膚のリンパ管の形態を撮影する工程、
撮影された画像に基づき皮膚のリンパ管の形態に関するパラメータを計算する工程、
候補薬剤添加前又は対照薬剤添加群の皮膚における皮膚のリンパ管形態に関するパラメータと比較する工程、そして
パラメータの変化に基づき、候補薬剤を肌状態改善薬として選択する工程、
を含む請求項8に記載のスクリーニング方法。 - 前記皮膚のリンパ管の形態に関するパラメータが、リンパ管の分岐数及び直径からなる群から選ばれる少なくとも1により決定される、請求項9に記載の方法。
- 前記皮膚が、リンパ管構造を含む培養皮膚である、請求項9又は10に記載の方法。
- リンパ管内皮細胞のVE-カドヘリン発現量を指標とした、肌状態改善薬のスクリーニング方法。
- 候補薬剤を皮膚に添加する工程、
添加後の皮膚のリンパ管内皮細胞におけるVE-カドヘリン発現を測定する工程、
候補薬剤添加前又は対照薬剤添加群の皮膚のリンパ管内皮細胞におけるVE-カドヘリン発現と比較する工程、そして
VE-カドヘリン発現量の変化に基づき、候補薬剤を肌状態改善薬として選択する工程、
を含む、請求項12に記載のスクリーニング方法。 - 前記皮膚が、リンパ管構造を含む培養皮膚である、請求項13に記載の方法。
- 候補薬剤を含む培地中でリンパ管内皮細胞を培養する工程
培養後のリンパ管内皮細胞におけるVE-カドヘリン発現を測定する工程、
対照におけるVE-カドヘリン発現量と比較する工程、
VE-カドヘリン発現変化に基づき、候補薬剤を肌状態改善薬として選択する工程
を含む、請求項12に記載のスクリーニング方法。 - 皮膚のリンパ管の直径の増大剤を含む、肌状態改善用薬剤。
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| US20080051644A1 (en) * | 2006-02-17 | 2008-02-28 | Raymond Tabibiazar | Lymphedema associated genes and model |
| JP2019063049A (ja) * | 2017-09-29 | 2019-04-25 | 株式会社 資生堂 | 皮膚の血管網を可視化する装置、方法およびプログラム |
| JP2022500020A (ja) * | 2018-09-07 | 2022-01-04 | ザ・チルドレンズ・ホスピタル・オブ・フィラデルフィアThe Children’S Hospital Of Philadelphia | リンパ系疾患の診断および治療のための組成物および方法 |
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| US20080051644A1 (en) * | 2006-02-17 | 2008-02-28 | Raymond Tabibiazar | Lymphedema associated genes and model |
| JP2019063049A (ja) * | 2017-09-29 | 2019-04-25 | 株式会社 資生堂 | 皮膚の血管網を可視化する装置、方法およびプログラム |
| JP2022500020A (ja) * | 2018-09-07 | 2022-01-04 | ザ・チルドレンズ・ホスピタル・オブ・フィラデルフィアThe Children’S Hospital Of Philadelphia | リンパ系疾患の診断および治療のための組成物および方法 |
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| "New points of view have also been applied to beauty foods. Rooibos extract has been confirmed to improve the adhesion function of lymphatic endothelial cells. Contributes to improving skin elasticity and improving skin roughness", POLA ORBIS HOLDINGS NEWS RELEASE, 24 August 2015 (2015-08-24), pages 1 - 2, XP009549938, Retrieved from the Internet <URL:http://www.pola-rm.co.jp/pdf/release_20150824.pdf> * |
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