Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 10 de 10
Filter
2.
J Dermatol Sci ; 90(1): 75-81, 2018 Apr.
Article in English | MEDLINE | ID: mdl-29366526

ABSTRACT

BACKGROUND: Biomarkers provide beneficial information to make diagnoses and monitor the progression of many skin diseases. However, biomarkers produced by skin lesion may be too low at concentration to be detected in the systemic circulation. OBJECTIVE: To address whether intralesional blood (ILB) is advantageous to detect skin-derived biomarkers over circulation blood (CB) of patients with skin diseases. METHODS: ILB was collected as overflowing blood when a small incision was made in lesions of patients with mastocytoma and psoriasis. Concentrations of histamine and Human ß-Defensin 2 were determined by ELISA. IL-8 was measured using a cytometric beads array (CBA) kit. IL-8 levels in psoriatic lesions were assessed by immunohistochemical staining and quantitative (q) RT-PCR. MicroRNA levels were measured using qRT-PCR. RESULTS: Plasma histamine levels were increased in ILB of mastocytoma compared with those in CB. Patients with psoriasis showed increased levels of IL-8, ß-Defensin 2 in ILB as compared to those in CB. IL-8 levels in ILB correlated with local PASI scores and therefore reversed to those in CB after attenuation of psoriasis with treatment. Furthermore, ILB in psoriasis patients showed increased miR-203, which was highly expressed in psoriatic epidermis. CONCLUSION: ILB contains disease-specific biomarkers at higher concentrations than those in CB, and may be useful for diagnosis and monitoring the progression of skin diseases. Thus, this study illustrates the versatility of ILB with an easy accessibility of biomarkers of chemicals, proteins as well as nucleic acids for a myriad of diseases including inflammatory dermatoses and cancers.


Subject(s)
Mastocytoma, Skin/pathology , Psoriasis/pathology , Skin/pathology , Adult , Aged , Biomarkers/analysis , Biomarkers/metabolism , Enzyme-Linked Immunosorbent Assay , Female , Histamine/blood , Humans , Interleukin-8/analysis , Male , Mastocytoma, Skin/blood , MicroRNAs/analysis , MicroRNAs/metabolism , Middle Aged , Psoriasis/blood , Skin/blood supply , beta-Defensins/analysis
3.
J Clin Virol ; 82: 101-107, 2016 09.
Article in English | MEDLINE | ID: mdl-27472520

ABSTRACT

BACKGROUND: Although Merkel cell polyomavirus (MCPyV) has the potential to cause Merkel cell carcinoma (MCC), it is also found in the normal skin of healthy individuals. However, the mechanism for transformation of MCPyV to an oncogenic form is unknown. OBJECTIVES: To investigate the levels of MCPyV infection in the normal skin patients with MCC compared with those in a control cohort. STUDY DESIGN: We studied a total of six Japanese patients with cutaneous MCC. Sun-exposed and sun-unexposed skin swabs were obtained and analyzed for MCPyV loads using quantitative real-time polymerase chain reaction. RESULTS: At first, we found a patient with MCC carrying an extremely high load of MCPyV DNA in normal skin. This unique case prompted us to further explore the levels of MCPyV as skin microbiota in patients with MCC. We showed that MCPyV DNA levels were significantly higher in swabs obtained from normal skin samples of six patients with MCC compared with those from 30 age-matched healthy individuals and 19 patients with other cutaneous cancers. Whereas MCPyV strains obtained from the normal skin of patients with MCC had gene sequences without structural alterations, sequences of the tumor-derived strains showed truncating mutations or deletions. CONCLUSIONS: Although the number of patients with MCC studied was small, our findings suggest that MCC may occur with a background of high MCPyV load in the skin, and are expected to stimulate further studies on whether such skin virome levels could be one of predictive markers for the development of MCC.


Subject(s)
Carcinoma, Merkel Cell/virology , DNA, Viral/analysis , Merkel cell polyomavirus/isolation & purification , Skin Neoplasms/virology , Skin/virology , Viral Load , Aged , Aged, 80 and over , Asian People , Female , Humans , Male , Merkel cell polyomavirus/genetics , Real-Time Polymerase Chain Reaction
4.
World J Gastroenterol ; 21(12): 3746-9, 2015 Mar 28.
Article in English | MEDLINE | ID: mdl-25834345

ABSTRACT

Monoclonal antibodies against epidermal growth factor receptor (EGFR) are used in the treatment of advanced colorectal cancer. However, these agents can induce severe dermatological side effects that discourage their administration in patients with chronic dermatological disease. EGFR plays a key role in normal skin development and immunological function, and is expressed in various tissues and organs, although contrarily, it is overexpressed in psoriasis-related skin lesions. Thus, discussion is ongoing regarding the putative pathological role and therapeutic potential of this protein. We herein report on a patient with advanced colon cancer and concomitant long-standing psoriasis vulgaris who received anti-EGFR antibody monotherapy as a third-line treatment for metastatic disease. One week after the initiation of treatment, the patient's skin lesions dramatically subsided and the improvement was sustained during therapy. Based on this case, we propose that anti-EGFR antibody therapy is not necessarily contraindicated in patients with psoriasis vulgaris. Moreover, the findings reaffirmed that EGFR is an important molecule in the pathology of psoriasis.


Subject(s)
Antibodies, Monoclonal/therapeutic use , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Cetuximab/therapeutic use , Colonic Neoplasms/drug therapy , Protein Kinase Inhibitors/therapeutic use , Chronic Disease , Colonic Neoplasms/complications , Colonic Neoplasms/diagnosis , Colonic Neoplasms/enzymology , ErbB Receptors/antagonists & inhibitors , ErbB Receptors/metabolism , Humans , Male , Middle Aged , Molecular Targeted Therapy , Panitumumab , Psoriasis/complications , Psoriasis/diagnosis , Psoriasis/drug therapy , Psoriasis/enzymology , Time Factors , Tomography, X-Ray Computed , Treatment Outcome
7.
Int J Cancer ; 134(10): 2393-402, 2014 May 15.
Article in English | MEDLINE | ID: mdl-24243586

ABSTRACT

Tumor-infiltrating lymphocytes (TILs) have been reported as a prognostic factor in various cancers and are a promising target for immunotherapy. To investigate whether TILs have any impact on the prognosis of angiosarcoma patients, 55 non-treated patients (40 patients at stage 1 with cutaneous localized tumors, 4 patients at stage 2 with lymph node metastases and 11 patients at stage 3 with distant metastases) with angiosarcoma were evaluated retrospectively by immunohistochemistry stained CD4, CD8, FOXP3 and Ki67. The Kaplan-Meier method was used to estimate overall survival with patients at stage 1. Survival differences were analyzed by the log-rank test. Patients with higher numbers of CD8(+) TILs in their primary tumors survived significantly longer compared with patients with lower values. Moreover, the number of CD8 in TILs was positively correlated with a distant metastasis-free period. The total number of primary TILs (CD4 plus CD8) and CD8(+) primary TILs of stage 3 patients with distant metastases was positively correlated with their overall survival. To evaluate whether CD8(+) effector T cells are activated or differentiated, flow cytometric analysis of peripheral blood mononuclear cells (PBMC) was performed. The percentages of CD8(+) T cells producing IFN-γ in PBMC were significantly higher in patients with angiosarcoma (n = 10) compared not only with that of healthy controls (n = 20) but also patients with advanced melanoma (n = 11). These results suggest that anti-tumor immunity is clinically relevant in angiosarcoma.


Subject(s)
CD8-Positive T-Lymphocytes/immunology , Hemangiosarcoma/immunology , Lymphocytes, Tumor-Infiltrating/immunology , Skin Neoplasms/immunology , Aged , Aged, 80 and over , CD4 Antigens/immunology , CD4 Antigens/metabolism , CD8 Antigens/immunology , CD8 Antigens/metabolism , CD8-Positive T-Lymphocytes/metabolism , CD8-Positive T-Lymphocytes/pathology , Female , Forkhead Transcription Factors/immunology , Forkhead Transcription Factors/metabolism , Hemangiosarcoma/metabolism , Hemangiosarcoma/pathology , Humans , Immunohistochemistry , Interferon-gamma/immunology , Interferon-gamma/metabolism , Kaplan-Meier Estimate , Ki-67 Antigen/immunology , Ki-67 Antigen/metabolism , Leukocyte Count , Leukocytes, Mononuclear/immunology , Leukocytes, Mononuclear/metabolism , Leukocytes, Mononuclear/pathology , Lymphatic Metastasis , Lymphocytes, Tumor-Infiltrating/metabolism , Lymphocytes, Tumor-Infiltrating/pathology , Male , Middle Aged , Neoplasm Staging , Prognosis , Retrospective Studies , Skin Neoplasms/metabolism , Skin Neoplasms/pathology
9.
Dermatol Pract Concept ; 2(4): 204a07, 2012 Oct.
Article in English | MEDLINE | ID: mdl-23785621

ABSTRACT

An 11-year-old girl presented to our department with a blue-gray papule approximately 4 mm in diameter. We suspected that it was a blue nevus or a pigmented Reed/Spitz nevus. On dermoscopic observation, the lesion showed homogeneous black-bluish pigmentation. This dermoscopic feature was suggestive of a blue nevus. However, near-circumferential streaks and a global feature of a "starburst pattern" were also observed, as is often found in a Reed/Spitz nevus. The lesion was excised and histological examination revealed spindle cells with melanin pigments diffusely present in the upper dermis and around hair follicles in the mid-dermis, but not in the epidermis. The melanocytic cells were arranged in a symmetrical wedge-shaped configuration. In addition, there was a diffuse fibrosis. Finally, we made a diagnosis of a blue nevus based on these findings.

10.
J Immunol ; 186(7): 4481-9, 2011 Apr 01.
Article in English | MEDLINE | ID: mdl-21346238

ABSTRACT

Psoriasis is an inflammatory disease with dynamic interactions between the immune system and the skin. The IL-23/Th17 axis plays an important role in the pathogenesis of psoriasis, although the exact contributions of IL-23 and IL-17 in vivo remain unclear. K5.Stat3C transgenic mice constitutively express activated Stat3 within keratinocytes, and these animals develop skin lesions with histological and cytokine profiles similar to those of human plaque psoriasis. In this study, we characterized the effects of anti-mouse IL-17A, anti-mouse IL-12/23p40, and anti-mouse IL-23p19 Abs on the development of psoriasis-like lesions in K5.Stat3C transgenic mice. Treatment with anti-IL-12/23p40 or anti-IL-23p19 Abs greatly inhibited 12-O-tetradecanoylphorbol-13-acetate-induced epidermal hyperplasia in the ears of K5.Stat3C mice, whereas the inhibitory effect of an anti-IL-17A Ab was relatively less prominent. Treatment with anti-IL-12/23p40 or anti-IL-23p19 Abs markedly lowered transcript levels of Th17 cytokines (e.g., IL-17 and IL-22), ß-defensins, and S100A family members in skin lesions. However, anti-IL-17A Ab treatment did not affect mRNA levels of Th17 cytokines. Crossing IL-17A-deficient mice with K5.Stat3C mice resulted in partial attenuation of 12-O-tetradecanoylphorbol-13-acetate-induced lesions, which were further attenuated by anti-IL-12/23p40 Ab treatment. FACS analysis of skin-draining lymph node cells from mice that were intradermally injected with IL-23 revealed an increase in both IL-22-producing T cells and NK-22 cells. Taken together, this system provides a useful mouse model for psoriasis and demonstrates distinct roles for IL-23 and IL-17.


Subject(s)
Interleukin-17/physiology , Interleukin-23/physiology , Psoriasis/immunology , Psoriasis/therapy , Animals , Cells, Cultured , Cytokines/biosynthesis , Disease Models, Animal , Female , Gene Expression Regulation/immunology , Humans , Immunization, Passive , Immunophenotyping , Interleukin-17/immunology , Interleukin-23/immunology , Killer Cells, Natural/immunology , Killer Cells, Natural/pathology , Male , Mice , Mice, Transgenic , NIH 3T3 Cells , Psoriasis/pathology , S100 Proteins/biosynthesis , T-Lymphocyte Subsets/immunology , T-Lymphocyte Subsets/pathology , Tetradecanoylphorbol Acetate/analogs & derivatives , Tetradecanoylphorbol Acetate/toxicity , beta-Defensins/biosynthesis
SELECTION OF CITATIONS
SEARCH DETAIL
...