CN111856030A - Virus receptor protein for diagnosing leucoderma diseases and application thereof - Google Patents
Virus receptor protein for diagnosing leucoderma diseases and application thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of biological medicines, and particularly relates to a virus receptor protein for diagnosing leucoderma diseases and application thereof. The application of a molecular marker in preparing a diagnostic kit for diagnosing leucoderma is disclosed, wherein the molecular marker is human skin melanocyte HSV-1 receptor protein. Human skin melanocyte HSV-1 receptor proteins were semi-quantitatively analyzed using a western blot assay and predicted whether protein levels were reduced. Experiments prove that after HSV-1 infects human melanocytes, the expression of melanin synthesis related protein and the melanin synthesis function are inhibited by up-regulating VN1R5, so that the vitiligo is caused. The human skin melanocyte HSV-1 receptor protein is not complex in flow, the detection result can be obtained by using an enzyme-labeling instrument, the kit manufacturing means is mature and easy to purchase, and the kit can be popularized in clinical application. The early discovery of the reduced human skin melanocyte HSV-1 receptor protein level is beneficial to diagnosing leucoderma, guiding the next treatment and reducing the risk of disease deterioration of leucoderma patients.
Description
Technical Field
The invention belongs to the technical field of biological medicines, and particularly relates to a virus receptor protein for diagnosing leucoderma diseases and application thereof.
Background
Vitiligo (vitiligo) is an acquired skin or mucosal depigmentation skin disease characterized by the loss of functional melanocytes and skin/mucosal melanin. The prevalence rate of the vitiligo in different regions and different ethnic groups is obviously different, and is generally about 0.1-2.9%. Vitiligo is a recurrent and multifactorial skin disease, and often brings great psychological stress to patients and families. Therefore, the early diagnosis and the active treatment of the leucoderma are very important for improving the prognosis of patients.
The etiology and pathogenesis of vitiligo are not clear so far, and various theories including an autoimmune theory, a genetic theory, a neurochemical factor theory, an oxidative stress theory, a melanocyte self-destruction theory, a keratinocyte theory and the like are proposed by different scholars, but none of the theories can completely explain the pathogenesis of vitiligo. Because the molecular mechanism of vitiligo pathogenesis is not clear, a specific treatment method is not available at present, and the existing main treatment methods comprise: chinese medicinal treatment (such as lapis pill and leucocyte-expelling granule), western medicine treatment (such as oral or topical glucocorticoid), 308nm excimer laser, narrow spectrum ultraviolet light therapy, psoralen photochemotherapy, and surgical therapy (such as autologous skin transplantation, autologous melanocyte culture transplantation, drilled skin transplantation, and skin grinding). Although some patients have expected effects, the above treatment methods have undesirable effects on some patients or are resistant to treatment after a certain period of treatment, and may cause a series of side effects, such as skin atrophy, local hirsutism, infection, nausea and vomiting, impaired liver function, phototoxic reaction and even potential carcinogenic risks. Therefore, the research of finding safer and more effective treatment means for vitiligo by clarifying the pathogenesis of vitiligo has become a hotspot. In recent years, more and more scholars have been concerned about the relationship between various viral infections and vitiligo. For example, turkey herpesvirus has shown some causal association with SL chicken vitiligo models; cytomegalovirus DNA is found in skin lesions of leucoderma patients; in addition, human immunodeficiency virus, EB virus, and hepatitis B virus are also associated with vitiligo.
Herpes simplex virus-1 (HSV-1) is a ubiquitous pathogen, spreading primarily between epithelial and neural cells. HSV-1 infects the human body through the skin or mucosa, and further induces latent infection of sensory neurons. In the case of hypoimmunity, clinical symptoms appear. It is now clear that HSV can infect keratinocytes. Keratinocytes are closely related to melanocytes, which form epidermal melanocyte units with melanocytes, which transport their synthesized melanin to surrounding keratinocytes via their dendrites. The research on the influence of HSV on melanocytes is expected to provide a new idea for the research of vitiligo.
Reports in the prior art about the relation between HSV and melanocytes all indicate that HSV can infect mouse melanocytes. In the mouse melanocyte line, HSV-1 infects cells in a dose-dependent manner, inhibits cell proliferation and induces cell apoptosis. The mouse epidermal skin sheet is used for establishing an HSV-1 in vitro infection system, and melanocytes are infected by HSV-1 and can be infected even under the condition that epidermal keratinocyte nectin-1 receptors are deficient. The hair follicle stem cells positioned at the hair follicle bulge part have important significance for leucoderma complexion by promoting the regeneration of melanocytes. In the mouse epidermal skin sheet establishment HSV-1 in-vitro infection system, HSV-1 invades hair follicle bulge stem cells in the growth phase, and the stem cells in the resting phase are not affected, so that whether HSV-1 infects the hair follicle bulge stem cells depends on the state of the hair follicle bulge stem cells. However, the results of two studies show that there is no significant difference between DNA of HSV and HSV antibody in the serum and skin tissues of patients with vitiligo and normal human. The results of the human body sample and the mouse sample are inconsistent, and the analysis may be caused by the following reasons: the virus or its antibodies in the serum or skin lesions are in a small amount and are not detected or positive enough; the effect of HSV on human melanocytes was not directly examined; HSV levels themselves are unchanged, but receptor levels are changed or other mechanisms initiated by HSV are involved in melanocyte damage; the process from the destruction of melanocytes by HSV to the formation of vitiligo is required.
HSV-1 receptor has not been reported as a molecular marker for diagnosing leucoderma. The method thoroughly achieves early diagnosis and early effective treatment in practical significance, further comprehensively and systematically studies the leucoderma action mechanism, finds out related markers for leucoderma disease diagnosis, and is a key point and a clinically urgent problem to be solved for the leucoderma disease research.
Disclosure of Invention
The invention aims to provide a virus receptor protein for diagnosing leucoderma diseases and application thereof. The research of the invention finds that HSV-1 can infect human melanocytes by combining with HSV-1 receptors, inhibit the expression of melanin synthesis related protein and the melanin synthesis function, and further cause the attack of leucoderma. The human skin melanocyte HSV-1 receptor protein is expected to become a new vitiligo disease diagnosis index. The early discovery of the decreased human skin melanocyte HSV-1 receptor protein level is favorable for diagnosing leucoderma, guiding the next treatment and reducing the risk of disease deterioration of leucoderma patients.
In order to achieve the purpose, the invention adopts the following technical scheme.
The application of a molecular marker in preparing a diagnostic kit for diagnosing leucoderma is disclosed, wherein the molecular marker is human skin melanocyte HSV-1 receptor protein.
Further, the human skin melanocyte HSV-1 receptor protein is nectin-1, HVEM and PILRA.
Further, the diagnosis is to distinguish vitiligo patients from healthy people.
Further, human skin melanocyte HSV-1 receptor proteins were semi-quantitatively analyzed using a western blot assay and predicted whether protein levels were reduced.
Compared with the prior art, the invention has the following beneficial effects.
The virus receptor protein for diagnosing the vitiligo provides a new diagnosis index or a new treatment target for the vitiligo. The research of the invention finds that after HSV-1 infects human melanocytes, the expression of melanin synthesis related protein and the melanin synthesis function are inhibited by up-regulating VN1R5, thereby causing the attack of leucoderma. The human skin melanocyte HSV-1 receptor protein is expected to become a new vitiligo disease diagnosis index. The invention provides a new diagnosis index or a new treatment target point for the vitiligo.
Human skin melanocyte HSV-1 receptor proteins were semi-quantitatively analyzed using a western blot assay and predicted whether protein levels were reduced. The diagnosis accuracy is higher, the detection flow of the human skin melanocyte HSV-1 receptor protein is not complex, the detection result can be obtained by applying an enzyme-labeling instrument, the manufacturing means of the kit is mature and easy to purchase, and the kit can be popularized in clinical application. The early discovery of the elevated human skin melanocyte HSV-1 receptor protein level is beneficial to the diagnosis of leucoderma, the guidance of the next treatment and the reduction of the risk of disease deterioration of leucoderma patients.
Drawings
FIG. 1 shows the cell morphology of HSV-1 infected melanocytes under an inverted fluorescence microscope, wherein a shows the color development of rEGFP-HSV-1 fluorescent protein, and b shows the morphological change of PIG1 cells.
FIG. 2 shows the results of melanin synthesis assay, wherein a is melanin content and b is tyrosinase activity.
FIG. 3 shows the results of immunofluorescence assay of gp100 protein.
FIG. 4 shows the results of western blot detection of proteins MITF, TYR, TRP-1, and gp 100.
FIG. 5 shows the results of immunofluorescence assay for nectin-1 protein.
FIG. 6 shows the results of western blot detection of proteins nectin-1, HVEM and PILRA.
Detailed Description
The invention is further elucidated with reference to the embodiments and the drawings.
Examples are given.
One, experimental materials and groups.
1. Materials: cell lines and HSV-1 virus.
The immortalized human epidermal melanocyte line PIG1 and the immortalized human vitiligo melanocyte line PIG3V are respectively from the dermatology department of the Beijing hospital of the fourth university of military medical science. Cultured in medium 254 (Gibco) containing the human melanocyte growth supplement hmgs (Gibco), 10% Fetal Bovine Serum (FBS) (Cellmax) and 1% penicillin-streptomycin antibiotic cocktail (Bioindustries). The STR-identified human cervical cancer cell line HeLa was purchased from iCell Bioscience Inc (shanghai, china) and cultured in dmem (hyclone) containing 10% fetal bovine serum and 1% penicillin streptomycin. All cell lines were 37 ℃ 5% CO 2Is incubated in a humidified incubator. Recombinant virus rEGFP-HSV-1 carrying green fluorescent protein was purchased from Baihao Biotechnology Inc. (Shenyang). Viral amplification was performed using HeLa cells. The specific method comprises the steps of culturing HeLa cells by using a 10cm culture dish until the confluence rate is 50% -70%, replacing a fresh culture medium DMEM10ml, and adding 1ml of virus suspension, namely a HeLa cell culture medium: the HSV-1 solution is 10: 1. collecting supernatant after 48h of amplification, and storing in a refrigerator at-80 ℃.
2. And (4) grouping the cells.
(1) Experimental groups: HSV-1 infected PIG 1; (2) control group: PIG1 without HSV-1 infection; (3) group 3V: PIG3V without HSV-1 infection.
And II, an experimental method.
1. HSV-1 infects melanocytes and is observed morphologically.
PIG1 cells were cultured in medium 254 (Gibco) + HMGS (Gibco) +10% fetal bovine serum (Cellmax) +1% diabody (Biological Industries). After the confluence rate reaches 50-70%, recombinant rEGFP-HSV-1 virus is infected. The proportion of experimental group infected viruses is respectively culture medium: virus liquid = 3: 1. 5: 1. 7: 1. 9: 1. 11: 1. the medium was replaced with fresh medium 12h after viral infection. The infection efficiency was examined by inverted fluorescence microscopy and 3 fields were randomly selected for each group. The detection time points are 0h, 6h, 12h, 24h, 36h, 48h and 72 h.
2. And (4) measuring the content of the melanin.
Cells were plated in 96-well plates and experiments were divided into 3 groups: experimental group (PIG 1 cells infected with HSV-1), negative control group (PIG 1 cells not infected with HSV-1) and PIG3V control group (PIG 3V cells not infected with HSV-1). The experimental group is infected HSV-1 and cultured together with PIG1 cells for 72 h. Melanin content was measured after 72h, and the control group and 3V group were measured at the same time point. PBS (Cellmax) 2 washes were then lysed in 200ul 1N NaOH (Bilun sky) for 30 min. The absorbance of A450 was measured using an ND-1000 spectrophotometer (Thermo Fisher).
3. And (4) determining the content of tyrosinase.
Tyrosinase activity was measured using the L-DOPA oxidation method. The cells were treated as before. PBS washing 2 times, with 1% Triton X-100 (Solebao) PBS (Solebao) 90 ul homogenate cells. 50 ul of the cell extract was mixed with 90 ul of freshly prepared PBS substrate solution containing 0.1% L-DOPA and incubated at 37 ℃ for 20 minutes. The absorbance at A475 was measured using an ND-1000 spectrophotometer (Thermo Fisher).
4、Western blot。
After cell treatment, cell proteins were collected in a ratio of 99:1 using RIPA lysate (cloudy day) and PMSF (cloudy day). Protein was quantified using BCA protein assay kit (cloudband day). Equal amounts of protein were mixed with PBS and SDS buffer (petunia) and boiled at 100 ℃ for 5 minutes. After electrophoresis and membrane conversion, 5% skim milk was sealed for 2 h. anti-MITF (1: 1000, # ab12039, Abcam), TYR (1: 1000, # ab170905, Abcam), TRP-1 (1: 1000, # ab135447, Abcam), gp100 (1: 5000, # ab137078, Abcam), nectin-1 (1: 2000, TA503469, Origene), HVEM (1: 100, #94804, R & D), PILR-1 (1: 1000, DDX 0230-0230P-100, Novus), GAPDH (1: 5000, 60004-1-Ig, Proteintetech) were incubated overnight at 4 ℃. After 1 × TBST wash, PVDF membrane (Millipore) was incubated with secondary antibody (anti-rabbit IgG, 1: 1000; anti-mouse IgG, 1: 5000) for 2h at room temperature. The bands were detected using an electrochemiluminescence western blotting substrate (Pierce) and the luminescence solution was ECL luminescence kit (petit sky).
5. Immunofluorescence.
After cell treatment, cells were washed 3 times with PBS. Cells were fixed with 4% paraformaldehyde fixing solution (bi yun day) for 20 min. 0.2% Triton X-100 (Solebao) was prepared in PBS containing 1% bovine serum albumin (Biyunyan) and permeabilized at room temperature for 20 minutes. After 3 washes with PBS, the cells were blocked with 1% bovine serum albumin in PBS for 1h at room temperature and incubated overnight at 4 ℃ with primary antibodies nectin-1 (1: 100) and gp100 (1: 250). After 3 times of PBS washing, the primary antibody was detected by using Alexa Fluor 594 labeled affinity purified goat anti-mouse IgG secondary antibody (Abcam) and Alexa Fluor 594 labeled affinity purified goat anti-rabbit IgG secondary antibody (Abcam) under the incubation condition of 37 ℃ for 1 h. After 3 washes with PBS, nuclear staining was performed with DAPI (solibao) for 10 min at room temperature. Cells were observed under a BioSpa live cell assay system (Bio Tek, USA).
And thirdly, experimental results.
1. HSV-1 infects melanocytes.
Application of 0: 1. 3: 1. 5: 1. 7: 1. 9: 1. 11:1 concentration of rEGFP-HSV-1 infects PIG1, and the cell morphology is observed under an inverted fluorescence microscope at 0h, 6h, 12h, 24h, 36h, 48h and 72h respectively. In comparison with the control group, the cells started to infect at 24h except 11:1 (48 h). Concentration 7: 1 when the cells are infected for 72h, the rEGFP-HSV-1 fluorescent protein is developed, as shown in figure 1 a; and PIG1, the cell morphology changes most significantly, as shown in fig. 1b, the number of cell dendrites decreases, shortening and rounding. It was shown that HSV-1 can infect human skin melanocytes.
2. And (4) detecting melanin synthesis.
The melanin content and the tyrosinase activity were significantly reduced in both the experimental group and the 3V group compared with the control group (p<0.05), no significant difference between the experimental group and the 3V group (p>0.05) as shown in fig. 2. HSV-1 is shown to cause the decrease of PIG1 melanin synthesis and the decrease of PIG3V melanin synthesis of leucoderma melanocytes.
3. And detecting melanin synthesis related protein.
The results of immunofluorescence gp100 protein detection are shown in FIG. 3, the experimental group is obviously lower than the control group: (p<0.05). The results of western blot detection of proteins MITF, TYR, TRP-1, and gp100 are shown in FIG. 3, andcompared with the control group, the expression level of the four proteins is obviously reduced in the experimental group and the 3V group (p<0.05); except that MITF was lower in the 3V group than in the experimental group: (p<0.05), no significant difference between the other three protein experimental groups and the 3V group: (p>0.05). The results show that HSV-1 causes the expression of protein related to PIG1 melanin synthesis to be reduced, and the expression of protein related to PIG3V melanin synthesis of leucoderma melanocytes is reduced.
4. HSV-1 receptor detection.
The results of immunofluorescence detecting the nectin-1 protein are shown in FIG. 5, and all the proteins are expressed in the experimental group, the control group and the 3V group, and the expression level of the 3V group is significantly lower than that of the control group (p<0.05), no difference between the experimental group and the control group: ( p>0.05). Results of western blot detection of proteins nectin-1, HVEM and PILRA are shown in FIG. 6, and the expression level of the three receptors is significantly lower than that of the control group no matter the experimental group or the 3V group (the expression level of the three receptors is significantly lower than that of the control group) ((thep<0.05); except that HVEM is lower than 3V group in experimental group (p<0.05), no significant difference between the other two receptor experimental groups and the 3V group: (p>0.05). The result shows that HSV-1 causes the reduction of the expression of the HSV-1 receptor of PIG1, and the expression of the HSV-1 receptor of leucoderma melanocyte PIG3V is reduced.
The research result shows that HSV-1 can infect human melanocytes by combining with HSV-1 receptors, inhibit expression of melanin synthesis related protein and melanin synthesis function, and further cause the attack of leucoderma. The reduction of human skin melanocyte HSV-1 receptors discovered by the research is expected to become a new diagnosis index of leucoderma diseases.
Claims (4)
1. The application of a molecular marker in preparing a diagnostic kit for diagnosing leucoderma is characterized in that the molecular marker is human skin melanocyte HSV-1 receptor protein.
2. The use of a molecular marker according to claim 1 for the preparation of a diagnostic kit for the diagnosis of vitiligo, wherein the human skin melanocyte HSV-1 receptor protein is nectin-1, HVEM, PILRA.
3. The use of a molecular marker according to claim 1 for the preparation of a diagnostic kit for the diagnosis of vitiligo, wherein the diagnosis is to distinguish vitiligo patients from healthy people.
4. Use of a molecular marker according to claim 1 for the preparation of a diagnostic kit for the diagnosis of vitiligo, wherein human skin melanocytes HSV-1 receptor protein is semi-quantitatively analyzed using a western blot assay and it is predicted whether the protein level is decreased.
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