Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 25
Filtrar
Más filtros











Intervalo de año de publicación
1.
Breast Cancer ; 28(6): 1328-1339, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34240315

RESUMEN

PURPOSE: Dendritic cells (DCs) are the most potent antigen-presenting cells that play a major role in initiating the antitumor immune response in different types of cancer. However, the prognostic significance of the accumulation of these cells in human early breast tumors is not totally clear. The aim of this study is to evaluate the prognostic relevance of CD1a( +) and CD83( +) dendritic cells in early breast cancer patients. METHODS: We conducted immunohistochemical assays to determine the number of stromal CD1a( +) and CD83( +) DCs in primary tumors from early invasive ductal breast cancer patients, and analyzed their association with clinico-pathological characteristics. RESULTS: Patients with high CD1a( +) DC number had lower risk of bone metastatic occurrence, as well as, longer disease-free survival (DFS), bone metastasis-free survival (BMFS) and overall survival (OS). Moreover, CD1a( +) DC number was an independent prognostic factor for BMFS and OS. In contrast, we found that patients with high number of CD83( +) DCs had lower risk of mix (bone and visceral)-metastatic occurrence. Likewise, these patients presented better prognosis with longer DFS, mix-MFS and OS. Furthermore, CD83( +) DC number was an independent prognostic factor for DFS and OS. CONCLUSION: The quantification of the stromal infiltration of DCs expressing CD1a or CD83 in early invasive breast cancer patients serves to indicate the prognostic risk of developing metastasis in a specific site.


Asunto(s)
Antígenos CD1/análisis , Antígenos CD/análisis , Neoplasias de la Mama/patología , Inmunoglobulinas/análisis , Glicoproteínas de Membrana/análisis , Adulto , Anciano , Anciano de 80 o más Años , Antígenos CD/inmunología , Antígenos CD1/inmunología , Biomarcadores de Tumor/inmunología , Células Dendríticas/inmunología , Células Dendríticas/patología , Femenino , Humanos , Inmunoglobulinas/inmunología , Glicoproteínas de Membrana/inmunología , Persona de Mediana Edad , Estudios Retrospectivos , Análisis de Supervivencia , Antígeno CD83
2.
Rev Inst Med Trop Sao Paulo ; 61: e25, 2019 Apr 18.
Artículo en Inglés | MEDLINE | ID: mdl-31017186

RESUMEN

Visceral Leishmaniasis is a public health problem caused by protozoans of the genus Leishmania. K39 serological test is commonly used in the initial investigation, with high specificity, but variable sensitivity. Amastigotes can be identified by optical microscopy, however, the differential diagnosis with cellular debris or other intracellular parasites is necessary. Recent studies have raised the possibility of using immunohistochemistry in the diagnosis of visceral leishmaniasis with labeling of amastigotes by the anti-CD1a antibody. This retrospective study was based on 38 samples from patients with visceral leishmaniasis whose diagnoses were confirmed by myelogram and/or k39 testing, aside from positive (N=13) and negative biopsies (N=25), 2 samples from patients with false positive biopsies for visceral leishmaniasis and 8 samples from patients with histoplasmosis diagnosis. The histological slides were evaluated for the presence of amastigotes and their Modified Ridley Parasitic Index. The samples were submitted to immunohistochemical reactions using the anti-CD1a antibody with MTB1 and O10 clones. Immunohistochemical reactions with MTB1 and O10 clones had low sensitivity in this study. However, all bone marrow samples were previously decalcified with nitric acid which is probably a deleterious treatment for immunohistochemical reactions in this site. Excluding these samples, we obtained 58.33% sensitivity and 100% specificity with the MTB1 clone. Despite the intermediate sensitivity, the immunohistochemistry for the CD1a marker with clone MTB1 can be useful in the differential diagnosis of visceral leishmaniasis, helping to discriminate leishmania amastigotes from other pathogens with similar morphology and cellular debris in different samples, except in bone marrow biopsies previously decalcified with nitric acid.


Asunto(s)
Anticuerpos Antiprotozoarios/análisis , Antígenos CD1/análisis , Leishmania donovani/inmunología , Leishmaniasis Visceral/diagnóstico , Humanos , Inmunohistoquímica , Estudios Retrospectivos , Sensibilidad y Especificidad
3.
Histopathology ; 72(6): 905-913, 2018 May.
Artículo en Inglés | MEDLINE | ID: mdl-29023924

RESUMEN

AIMS: Dendritic cells (DCs) are known to play a central role in the regulation of both innate and adaptive immunological responses, including antitumour immunity. The aim of this study was to evaluate the prognostic impact of intratumoral and peritumoral DCs in oral squamous cell carcinoma (OSCC) affecting the tongue and floor of the mouth. METHODS AND RESULTS: Immunohistochemistry for CD1a and CD83 was performed in 53 patients with OSCC in the tongue and floor of the mouth. The markers were evaluated by automated examination in intratumoral and peritumoral compartments, and the results were expressed as density of cells/mm2 . Correlations between these data and clinicopathological and survival outcomes were investigated. Depletion of peritumoral CD1a+ cells was associated with lymph node metastasis (P = 0.05), whereas depletion of peritumoral CD83+ cells was correlated with smoking history (P = 0.04), lymph node metastasis (P = 0.015), and extracapsular spread of lymph nodes (P = 0.018). Peritumoral CD1a+ was correlated with recurrence (P = 0.007) and overall survival (P = 0.03). The results of the survival analysis with the Cox proportional hazard model showed that depletion of peritumoral CD1a+ cells is an independent factor associated with overall survival and disease-free survival. CONCLUSION: Our results suggest that depletion of peritumoral CD1a+ cells is a strong independent prognostic factor, predicting a higher recurrence rates and worse survival outcomes.


Asunto(s)
Carcinoma de Células Escamosas/inmunología , Células Dendríticas/patología , Neoplasias de Cabeza y Cuello/inmunología , Neoplasias de la Boca/inmunología , Adulto , Anciano , Anciano de 80 o más Años , Antígenos CD1/análisis , Carcinoma de Células Escamosas/mortalidad , Carcinoma de Células Escamosas/patología , Supervivencia sin Enfermedad , Femenino , Neoplasias de Cabeza y Cuello/mortalidad , Neoplasias de Cabeza y Cuello/patología , Humanos , Estimación de Kaplan-Meier , Masculino , Persona de Mediana Edad , Neoplasias de la Boca/mortalidad , Neoplasias de la Boca/patología , Recurrencia Local de Neoplasia/inmunología , Recurrencia Local de Neoplasia/patología , Pronóstico , Modelos de Riesgos Proporcionales , Carcinoma de Células Escamosas de Cabeza y Cuello
4.
J. coloproctol. (Rio J., Impr.) ; 37(3): 242-246, July-Sept. 2017. graf
Artículo en Inglés | LILACS | ID: biblio-893986

RESUMEN

Abstract Langerhans' cell histiocytosis is a rare disease characterized by proliferation of Langerhans cells in the body. It affects mainly males, predominantly in childhood. Ulcerated plaques are one of the cutaneous forms of presentation. Diagnostic confirmation is done through immunohistochemistry. As therapeutic options, topical corticosteroids and chemotherapy are good choices. The case is reported of a male patient, aged 14, with perianal ulceration. He consulted a coloproctologist, who performed a biopsy of the region and started local triamcinolone applications. Immunohistochemistry diagnosed Langerhans' cells histiocytosis. Further investigation revealed diabetes insipidus, osteolytic lesions in the skull and lower limbs, enlarged liver, and encephalic alterations. Chemotherapy was started with Vinblastine, with significant improvement of the lesions.


Resumo A histiocitose de células de Langerhans é uma doença rara caracterizada pela proliferação de células de Langerhans no corpo. A doença afeta principalmente os homens, predominantemente na infância. Placas ulceradas são uma das formas cutâneas de apresentação. A confirmação diagnóstica é feita através de análise imuno-histoquímica. Como opções terapêuticas, corticosteroides tópicos e quimioterapia são boas escolhas. O caso aqui relatado é de um paciente do sexo masculino, com idade de 14 anos, com ulceração perianal. Ele consultou um coloproctologista, que realizou uma biópsia da região e iniciou o tratamento com aplicações locais de triancinolona. A análise imunohistoquímica diagnosticou histiocitose de células de Langerhans. Outros exames revelaram diabetes insipidus, lesões osteolíticas no crânio e nos membros inferiores, aumento do fígado e alterações encefálicas. A quimioterapia foi iniciada com vimblastina, com melhora significativa das lesões.


Asunto(s)
Humanos , Masculino , Adolescente , Perineo/lesiones , Enfermedades de la Piel/diagnóstico , Histiocitosis de Células de Langerhans/diagnóstico , Enfermedades de la Piel/patología , Inmunohistoquímica/métodos , Antígenos CD1/análisis
5.
J Oral Pathol Med ; 45(2): 127-35, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-26102283

RESUMEN

OBJECTIVE: Graft-versus-host disease (GVHD) is one of the main complications after haematopoietic stem cell transplantation. Clinical features of GVHD include either an acute (aGVHD) or a chronic (cGVHD) condition that affects locations such as the oral mucosa. While the involvement of the host's dendritic cells (DCs) has been demonstrated in aGVHD, the origin (donor/host) and mechanisms underlying oral cGVHD have not been completely elucidated. In this study, we intend to determine the origin of DCs present in mucosal tissue biopsies from the oral cavity of transplanted patients affected by cGVHD. METHODS: We purified DCs, from oral biopsies of three patients with cGVHD, through immunobeads and subsequently performed DNA extraction. The origin of the obtained DCs was determined by PCR amplification of 13 informative short tandem repeat (STR) alleles. We also characterised the DCs phenotype and the inflammatory infiltrate from biopsies of two patients by immunohistochemistry. RESULTS: Clinical and histological features of the biopsies were concordant with oral cGVHD. We identified CD11c-, CD207- and CD1a-positive cells in the epithelium and beneath the basal layer. Purification of DCs from the mucosa of patients affected by post-transplantation cGVHD was >95%. PCR-STR data analysis of DCs DNA showed that 100% of analysed cells were of donor origin in all of the evaluated patients. CONCLUSION: Our results demonstrate that resident DCs isolated from the oral tissue of allotransplanted patients affected by cGVHD are originated from the donor. Further research will clarify the role of DCs in the development and/or severity of oral cGVHD.


Asunto(s)
Células Dendríticas/patología , Enfermedad Injerto contra Huésped/patología , Trasplante de Células Madre Hematopoyéticas/métodos , Enfermedades de la Boca/etiología , Enfermedades de la Boca/patología , Mucosa Bucal/patología , Quimera por Trasplante , Adolescente , Adulto , Antígenos CD/análisis , Antígenos CD1/análisis , Antígeno CD11c/análisis , Femenino , Trasplante de Células Madre Hematopoyéticas/efectos adversos , Humanos , Lectinas Tipo C/análisis , Masculino , Lectinas de Unión a Manosa/análisis , Repeticiones de Microsatélite/genética , Persona de Mediana Edad , Boca , Trasplante Homólogo , Adulto Joven
6.
Am J Dermatopathol ; 36(8): 651-4, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-23719484

RESUMEN

E-cadherin, a member of the cadherin family of transmembrane adhesion receptors, is critical for cutaneous barrier function, as it promotes keratinocyte and Langerhans cell adhesion in the epidermis. Recent murine models of chronic inflammation identified new E-cadherin expressing subsets of mononuclear phagocytes, including alternatively activated macrophages and selected inflammatory dendritic cells. It has been shown in vitro that expression of E-cadherin by murine macrophages promotes their homotypic aggregation and fusion to multinucleated giant cells (MNGCs), a signature cell type of granulomatous inflammation. The purpose of this study was to assess E-cadherin expression on histiocytes and giant cells in cutaneous granulomas in humans. E-cadherin expression was evaluated by immunohistochemistry of formalin-fixed paraffin-embedded skin biopsies of foreign body granulomas (n = 21) and sarcoidosis (n = 21). The results showed consistent membranous E-cadherin staining pattern on mononucleated histiocytes and MNGCs in both granuloma types. These E-cadherin expressing histiocytes are distinct from dermal Langerhans cells because they lacked CD1a expression. Our findings suggest that E-cadherin expressing mononuclear histiocytes are likely precursors for MNGCs in cutaneous granulomas and may play a critical role in disease pathogenesis.


Asunto(s)
Cadherinas/análisis , Células Gigantes/química , Granuloma de Cuerpo Extraño/metabolismo , Histiocitos/química , Sarcoidosis/metabolismo , Enfermedades de la Piel/metabolismo , Piel/química , Antígenos CD , Antígenos CD1/análisis , Biomarcadores/análisis , Biopsia , Células Gigantes/patología , Granuloma de Cuerpo Extraño/patología , Histiocitos/patología , Humanos , Inmunohistoquímica , Sarcoidosis/patología , Piel/patología , Enfermedades de la Piel/patología
7.
Int J Oral Maxillofac Implants ; 28(1): 97-102, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23377053

RESUMEN

PURPOSE: The host response to infection differs between peri-implantitis and periodontitis, but the mechanisms underlying these differences are not understood. In this study, the distribution of dendritic cell subpopulations in healthy peri-implant mucosa (HPIM) was compared to that of healthy gingiva (HG). MATERIALS AND METHODS: HPIM and HG specimens were obtained from nonsmoking, systemically healthy subjects. Immunohistochemistry was used to quantify the number of Langerhans cells (LCs) (CD1a+) and interstitial dendritic cells (IDCs) (factor XIIIa+) in the oral epithelium, sulcular/junctional epithelia, and lamina propria without inflammatory infiltration and with inflammatory infiltration. RESULTS: Fourteen HPIM and 13 HG specimens were obtained from subjects aged 29 to 55 years. The lamina propria of the HPIM had fewer LCs than that of the HG (HPIM: 7.99 ± 10.76, HG: 25.68 ± 16.98; P = .003). There was no significant difference in the number of CD1a+ cells in the oral epithelium or the sulcular/junctional epithelia between the HPIM and the HG (P ≥ .23). A greater number of IDCs was observed in the lamina propria with inflammatory infiltration of the HPIM compared to the HG (HPIM: 57.02 ± 35.70, HG: 33.89 ± 26.98; P = .06). CONCLUSIONS: In the lamina propria of HPIM, fewer LCs and more IDCs were observed. These differences may be associated with reduced stimulation of the innate and acquired immune responses initiated by LCs and the greater matrix remodeling of peri-implant tissue associated with IDCs.


Asunto(s)
Células Dendríticas/citología , Inserción Epitelial/citología , Encía/citología , Membrana Mucosa/citología , Adulto , Antígenos CD1/análisis , Biomarcadores/análisis , Recuento de Células , Células Dendríticas/inmunología , Inserción Epitelial/inmunología , Epitelio/inmunología , Factor XIIIa/análisis , Femenino , Encía/inmunología , Humanos , Inmunohistoquímica , Células de Langerhans/citología , Células de Langerhans/inmunología , Masculino , Persona de Mediana Edad , Membrana Mucosa/inmunología , Periodontitis/inmunología , Periodontitis/patología
8.
J Oral Pathol Med ; 42(6): 454-61, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-23278770

RESUMEN

BACKGROUND: Ameloblastomas and keratocystic odontogenic tumors (KOTs) are lesions that are characterized by locally invasive growth and cause extensive bone destruction. In addition, it is known that E-cadherin influences the adhesion of Langerhans cells (LCs) to keratinocytes. OBJECTIVE AND METHODS: The aim of this study was to investigate, using immunohistochemistry, the distribution of CD1a-positive cells in ameloblastomas and KOTs and their relationship with E-cadherin, in comparison to calcifying cystic odontogenic tumor (CCOT). RESULTS: The CD1a-positive LCs were observed in 11 ameloblastomas and KOTs. All of the cases of CCOT showed CD1a-positive LCs and a significant difference was found when this tumor was compared with ameloblastomas (P < 0.05, Mann-Whitney test). A statistically significant difference was also noted when comparing CD1a-positive LCs between CCOTs and KOTs (P < 0.05, Mann-Whitney test). Lower expression of E-cadherin in ameloblastomas (AMs) in relation to KOTs and CCOTs (P < 0.05, Fisher test) was observed. There was no correlation between E-cadherin and CD1a-positive LCs between all odontogenic tumors that were studied (P > 0.05, Spearman test). CONCLUSION: A quantitative difference of CD1a-positive cells between AMs and KOTs in comparison to CCOTs was observed. This permits to speculate that a depletion of CD1a-positive LCs might influence the local invasiveness of ameloblastomas and KOTs. Furthermore, it is suggested that E-cadherin mediates cell adhesion in these tumors.


Asunto(s)
Ameloblastoma/patología , Antígenos CD1/análisis , Cadherinas/análisis , Células de Langerhans/patología , Tumores Odontogénicos/patología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Adhesión Celular/fisiología , Recuento de Células , Forma de la Célula , Niño , Células Dendríticas/patología , Células Epiteliales/patología , Femenino , Humanos , Inmunohistoquímica , Queratinocitos/patología , Masculino , Neoplasias Mandibulares/patología , Neoplasias Maxilares/patología , Persona de Mediana Edad , Quiste Odontogénico Calcificado/patología , Adulto Joven
9.
J Oral Pathol Med ; 42(7): 535-40, 2013 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-23278174

RESUMEN

BACKGROUND: Deficient immune response in the cervical lymph nodes of patients with head and neck squamous cell carcinoma may contribute to dissemination of metastatic neoplastic cells. This study evaluates the immune response in cervical lymph nodes from patients with primary oral cavity squamous cell carcinoma (OCSCC). METHODS: The density of immature (CD1a(+)) and mature (CD83(+)) dendritic cells (DCs), cytotoxic T lymphocytes CD8(+) /perforin(+) (CTLs), and Foxp3(+) regulatory T (Tregs) cells in the lymph nodes of patients with OCSCC without cervical lymph node metastases (LN1) (negative) (n = 10) were identified through immunohistochemistry. From patients with cervical lymph node metastases, samples were obtained of lymph nodes both with (LM2) (positive) (n = 10) and without (LN2) (negative) (n = 10) metastases. RESULTS: The results demonstrated that the number of CD1a(+) and Foxp3(+) cells was significantly higher in the LM2 group than in either the LN1 or the LN2 group. In addition, the number of CD8(+) /perforin(+) and CD83(+) cells was significantly lower in the LM2 group than in the other groups. CONCLUSION: The results of this study demonstrate a higher density of immature DCs and Tregs cells and a lower density of mature DCs and activated CTLs in metastatic than in non-metastatic lymph nodes. These findings might indicate an immunosuppressive microenvironment, which could be involved in the spread of neoplastic cells to cervical lymph nodes.


Asunto(s)
Carcinoma de Células Escamosas/inmunología , Ganglios Linfáticos/inmunología , Neoplasias de la Boca/inmunología , Adulto , Anciano , Anciano de 80 o más Años , Antígenos CD/análisis , Antígenos CD1/análisis , Antígenos CD8/análisis , Linfocitos T CD8-positivos/inmunología , Carcinoma de Células Escamosas/patología , Recuento de Células , Células Dendríticas/inmunología , Femenino , Estudios de Seguimiento , Factores de Transcripción Forkhead/análisis , Humanos , Tolerancia Inmunológica/inmunología , Inmunoglobulinas/análisis , Metástasis Linfática/inmunología , Metástasis Linfática/patología , Activación de Linfocitos/inmunología , Masculino , Glicoproteínas de Membrana/análisis , Persona de Mediana Edad , Neoplasias de la Boca/patología , Cuello , Perforina , Proteínas Citotóxicas Formadoras de Poros/análisis , Estudios Retrospectivos , Linfocitos T Citotóxicos/inmunología , Linfocitos T Reguladores/inmunología , Microambiente Tumoral/inmunología , Adulto Joven , Antígeno CD83
10.
Oral Dis ; 19(1): 85-91, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-22788684

RESUMEN

OBJECTIVE: To analyze the expression and distribution patterns of mature dendritic cells (mDCs) and immature DCs (imDCs) in radicular cysts (RCs), dentigerous cysts (DtCs), and keratocystic odontogenic tumors (KCOTs). MATERIALS AND METHODS: Forty-nine odontogenic cystic lesions (OCLs) (RCs, n = 20; DtCs, n = 15; KCOTs, n = 14) were assessed using the following markers: S100, CD1a and CD207 for imDCs; and CD83 for mDCs. RESULTS: Almost all cases were S100, CD1a, and CD207 positive, whereas 63% were CD83 positive. RCs presented greater number of immunostained cells, followed by DtCs, and KCOTs. The number of S100+ cells was greater than both CD1a+ and CD207+ cells (P < 0.001), which showed approximately similar amounts, followed by lower number of CD83+ cells (P < 0.001) in each OCL type. Different from S100+ cells, both CD1a+ and CD207+ cells on the epithelium (P < 0.05) and CD83+ cells on the capsule (P < 0.05) were preferentially observed. In RCs, significant correlation was found between the thickness epithelium with S100+ and CD1a+ cells, and between the degree of inflammation with CD83+ cells. CONCLUSIONS: Dendritic cell populations in OCLs can be phenotypically heterogeneous, and it could represent distinct lineages and/or functional stages. It is suggested that besides DC-mediated immune cell interactions, DC-mediated tissue differentiation and maintenance in OCLs should also be considered.


Asunto(s)
Células Dendríticas/clasificación , Quistes Odontogénicos/patología , Adulto , Antígenos CD/análisis , Antígenos CD1/análisis , Linaje de la Célula , Células Dendríticas/patología , Quiste Dentígero/patología , Epitelio/patología , Femenino , Humanos , Inmunoglobulinas/análisis , Inmunofenotipificación , Lectinas Tipo C/análisis , Masculino , Lectinas de Unión a Manosa/análisis , Glicoproteínas de Membrana/análisis , Persona de Mediana Edad , Tumores Odontogénicos/patología , Quiste Radicular/patología , Proteínas S100/análisis , Antígeno CD83
11.
Artículo en Inglés | MEDLINE | ID: mdl-22668625

RESUMEN

OBJECTIVE: The aim of this study was to quantify the presence of Langerhans cells (LC) in oral lichen planus (OLP) and oral lichenoid lesions (OLL), comparing them with normal epithelium. STUDY DESIGN: Thirty-six patients with biopsy-proven OLP or OLL were selected for the study, as well as 23 control subjects free of inflammatory conditions. Immunohistochemical reactions were performed using the streptavidin-biotin peroxidase complex method with CD1a and CD83 primary antibodies. Densities were compared between groups and correlated with microscopic findings. RESULTS: Patients with lichenoid conditions (OLP + OLL) presented higher densities of CD1a(+) cells than the control subjects (P = .03). Higher densities of CD1a were associated with a thinner layer of inflammatory cells (P = .02). CONCLUSIONS: This study indicates that OLP and OLL are characterized by the recruitment of LC, which may play a significant role on its pathogenesis.


Asunto(s)
Células de Langerhans/patología , Liquen Plano Oral/patología , Adulto , Anciano , Anciano de 80 o más Años , Análisis de Varianza , Antígenos CD/análisis , Antígenos CD1/análisis , Estudios de Casos y Controles , Proliferación Celular , Femenino , Humanos , Inmunoglobulinas/análisis , Liquen Plano Oral/inmunología , Erupciones Liquenoides/inmunología , Erupciones Liquenoides/patología , Masculino , Glicoproteínas de Membrana/análisis , Persona de Mediana Edad , Mucosa Bucal/patología , Estadísticas no Paramétricas , Antígeno CD83
12.
J Oral Pathol Med ; 41(1): 47-53, 2012 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21627694

RESUMEN

OBJECTIVE: The aim of this study was to investigate the presence of CD1a-positive Langerhans cells and their relationship with E-cadherin in minor salivary gland tumors. METHODS: Twenty-seven minor salivary gland tumors were investigated using immunohistochemistry for CD1a and E-cadherin. RESULTS: A significant difference regarding the mean density of CD1a-positive Langerhans cells was observed between pleomorphic adenomas and malignant tumors studied (P = 0.001). No CD1a-positive cells were detected in most cases (n = 5) of cystic adenoid carcinomas. CD1a-positive cells were detected in one mucoepidermoid carcinoma case, and six low-grade polymorphous adenocarcinomas cases. Comparison of the mean density of CD1a-positive cells between the three malignant tumors showed no significant difference (P = 0.127). No significant difference was observed in the presence of E-cadherin between tumors (P = 0.73), but it was detected in 24 cases. CONCLUSIONS: The lack of CD1a-positive in malignant salivary gland tumors facilitates the neoplastic development and suggests that these cells might be useful as auxiliary diagnostic and prognostic tool in minor salivary gland tumors. Furthermore, it is suggested that E-cadherin mediates cell adhesion in these tumors although we did not demonstrate significance.


Asunto(s)
Antígenos CD1/análisis , Cadherinas/análisis , Células de Langerhans/patología , Neoplasias de las Glándulas Salivales/patología , Glándulas Salivales Menores/patología , Adenocarcinoma/patología , Adenoma Pleomórfico/patología , Carcinoma Adenoide Quístico/patología , Carcinoma Mucoepidermoide/patología , Recuento de Células , Colorantes , Células Dendríticas/patología , Epitelio/patología , Femenino , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Inmunohistoquímica , Células de Langerhans/inmunología , Masculino , Persona de Mediana Edad
13.
An Bras Dermatol ; 86(4): 785-8, 2011.
Artículo en Inglés, Portugués | MEDLINE | ID: mdl-21987150

RESUMEN

Congenital self-healing reticulohistiocytosis is the benign spectrum of Langerhans Cell Histiocytosis, characterized by cutaneous lesions at birth or in the neonatal period, absence of systemic manifestations and spontaneous resolution of clinical status. Despite the benign and often self-resolving course in most patients, studies show that in some cases there may be metastasis or recurrence of the disease, emphasizing that the clinical course is variable, requiring long-term follow-up. The monitoring of the patient for a long period is important to detect possible systemic involvement, as there is a report of recurrence involving the skin, mucosa, bone and pituitary gland.


Asunto(s)
Histiocitosis de Células de Langerhans/congénito , Histiocitosis de Células de Langerhans/diagnóstico , Antígenos CD1/análisis , Humanos , Inmunohistoquímica , Recién Nacido , Masculino , Remisión Espontánea , Proteínas S100/análisis
14.
An. bras. dermatol ; An. bras. dermatol;86(4): 785-788, jul.-ago. 2011. ilus
Artículo en Portugués | LILACS | ID: lil-600626

RESUMEN

A retículo-histiocitose congênita autolimitada é o espectro benigno das histiocitoses de células de Langerhans, caracterizada pela presença de lesões cutâneas ao nascimento ou no período neonatal, ausência de manifestações sistêmicas e resolução espontânea do quadro clínico. Apesar do curso benigno e frequente autorresolução na maior parte dos pacientes, estudos mostram que, em alguns casos, pode haver disseminação ou recaída da doença, enfatizando que o curso clínico é variável, havendo necessidade de seguimento em longo prazo. O acompanhamento do paciente por longo período é importante para detectar possível envolvimento sistêmico, pois existe relato de recorrência, envolvendo pele, mucosa, ossos e glândula pituitária.


Congenital self-healing reticulohistiocytosis is the benign spectrum of Langerhans Cell Histiocytosis, characterized by cutaneous lesions at birth or in the neonatal period, absence of systemic manifestations and spontaneous resolution of clinical status. Despite the benign and often self-resolving course in most patients, studies show that in some cases there may be metastasis or recurrence of the disease, emphasizing that the clinical course is variable, requiring long-term follow-up. The monitoring of the patient for a long period is important to detect possible systemic involvement, as there is a report of recurrence involving the skin, mucosa, bone and pituitary gland.


Asunto(s)
Humanos , Recién Nacido , Masculino , Histiocitosis de Células de Langerhans/congénito , Histiocitosis de Células de Langerhans/diagnóstico , Antígenos CD1/análisis , Inmunohistoquímica , Remisión Espontánea , /análisis
15.
J. bras. patol. med. lab ; J. bras. patol. med. lab;46(2): 135-141, abr. 2010. ilus, tab
Artículo en Inglés | LILACS | ID: lil-552259

RESUMEN

INTRODUCTION: Keratocystic odontogenic tumors (KOTs) are distinct odontogenic lesions commonly affecting the mandible bones. Langerhans cells (LCs) are specialized dendritic cells responsible for the presentation of antigens to T lymphocytes in mucosal and cutaneous surfaces. OBJECTIVE: This study analyzed the immunohistochemical expression of LCs in KOTs. MATERIALS AND METHODS: Fifteen cases of KOTs were studied using the anti-CD1a marker. Results: LCs were observed in all 15 cases analyzed. They were found to be concentrated in areas of cystic epithelial hyperplasia, mainly in those areas presenting higher concentration of inflammatory cells. Furthermore, a significant association between the number of LCs and areas of cystic epithelium presenting hyperplasia (Mann-Whitney test, p = 0.0223) was observed. The shape and location of these cells in KOTs epithelium were variable. CONCLUSION: The lower number of LCs observed on atrophic cystic epithelium of KOTs may be due to decreased epithelial immunosurveillance and this may result in locally aggressive invasiveness.


INTRODUÇÃO: Tumor odontogênico queratocístico (TOQ) é uma lesão odontogênica de caráter distinto que afeta frequentemente ossos maxilares. Células de Langerhans (CLs) são células dendríticas especializadas, responsáveis pela apresentação de antígenos aos linfócitos T nas superfícies cutânea e mucosa. OBJETIVO: Este estudo analisou a expressão imuno-histoquímica das CLs em lesões de TOQ. MATERIAIS E MÉTODOS: Quinze casos de TOQ foram estudados utilizando o marcador anti-CD1a. RESULTADOS: As CLs foram observadas em todos os 15 casos analisados. Essas células estavam concentradas em áreas de hiperplasia do epitélio cístico, especialmente naquelas que apresentavam alta concentração de células inflamatórias. Em adição, foi encontrada associação significativa entre número de CLs e áreas do epitélio cístico que apresentavam hiperplasia (Mann-Whitney test, p = 0.0223). O formato e a localização dessas células no epitélio dos TOQs foram variáveis. CONCLUSÃO: O menor número de CLs encontrado no revestimento cístico atrófico dos TOQs pode ser atribuído à imunovigilância deficiente e isso pode resultar em comportamento biológico localmente agressivo.


Asunto(s)
Humanos , Masculino , Femenino , Células de Langerhans/patología , Quistes Odontogénicos/patología , Tumores Odontogénicos/patología , Antígenos CD1/análisis , Inmunohistoquímica , Biomarcadores de Tumor
16.
Spec Care Dentist ; 29(2): 80-4, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19284507

RESUMEN

An immunoperoxidase technique was used to compare the number of CD1a+ and factor XIIIa+ dendritic cells (DCs), and CD68+ Macrophages (M) in 30 gingival samples from subjects with clinically healthy periodontitium (HP) and 10 samples from subjects with drug-induced gingival enlargement (DIGE). Fewer CD1a+ and factor XIIIa+ DCs were found in areas with inflammatory infiltration (II) of the lamina propria (LP) in the group with immunosuppressed DIGE (IDIGE) compared to the group with HP. In the sulcular and junctional/pocket epithelia, the number of CD1a+ DCs was decreased in the group with IDIGE (p<0.05). There was a tendency toward a reduced number of CD1a+ DCs and CD68+ M in areas without inflammatory infiltrate of the LP in the group with IDIGE. The alterations in the number of antigen-presenting cells (APCs) may be the reason for the decreased periodontal inflammation and breakdown clinically observed in subjects who are immunosuppressed.


Asunto(s)
Células Presentadoras de Antígenos/patología , Hipertrofia Gingival/inducido químicamente , Inmunosupresores/efectos adversos , Adulto , Células Presentadoras de Antígenos/inmunología , Antígenos CD/análisis , Antígenos CD1/análisis , Antígenos de Diferenciación Mielomonocítica/análisis , Células Dendríticas/inmunología , Células Dendríticas/patología , Inserción Epitelial/inmunología , Inserción Epitelial/patología , Epitelio/inmunología , Epitelio/patología , Factor XIIIa/análisis , Femenino , Líquido del Surco Gingival/inmunología , Hipertrofia Gingival/inmunología , Humanos , Técnicas para Inmunoenzimas , Células de Langerhans/inmunología , Células de Langerhans/patología , Macrófagos/inmunología , Macrófagos/patología , Masculino , Persona de Mediana Edad , Bolsa Periodontal/inmunología , Bolsa Periodontal/patología , Periodoncio/inmunología , Periodoncio/patología
17.
Braz Oral Res ; 22(3): 258-63, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18949313

RESUMEN

The aim of the present study was to compare quantitatively the distribution of dendritic cell subpopulations in chronic periodontitis and gingivitis. Fourteen biopsies from patients with chronic periodontitis and fifteen from patients with gingivitis were studied. An immunoperoxidase technique was used to quantify the number of Langerhans' cells (CD1a) and interstitial dendritic cells (factor XIIIa) in the oral and sulcular and junctional/pocket epithelia and in the lamina propria. A greater number of factor XIIIa+ dendritic cells in the lamina propria and CD1a+ dendritic cells in the oral epithelium were observed in gingivitis compared to the periodontitis group (p = 0.05). In the sulcular and junctional/pocket epithelia and in the lamina propria, the number of CD1a+ dendritic cells was similar in the gingivitis and periodontitis groups. In conclusion, the number of Langerhans' cells in the oral epithelium and interstitial dendritic cells in the lamina propria is increased in gingivitis compared to periodontitis, which may contribute to the different pattern of host response in these diseases.


Asunto(s)
Periodontitis Crónica/patología , Encía/patología , Gingivitis/patología , Células de Langerhans/patología , Adulto , Antígenos CD1/análisis , Antígenos CD1/inmunología , Biomarcadores/análisis , Biopsia , Factor XIIIa/análisis , Factor XIIIa/inmunología , Femenino , Gingivitis/inmunología , Humanos , Células de Langerhans/inmunología , Masculino , Monocitos , Estadísticas no Paramétricas
18.
Braz. oral res ; 22(3): 258-263, 2008. ilus, tab
Artículo en Inglés | LILACS | ID: lil-495602

RESUMEN

The aim of the present study was to compare quantitatively the distribution of dendritic cell subpopulations in chronic periodontitis and gingivitis. Fourteen biopsies from patients with chronic periodontitis and fifteen from patients with gingivitis were studied. An immunoperoxidase technique was used to quantify the number of Langerhans' cells (CD1a) and interstitial dendritic cells (factor XIIIa) in the oral and sulcular and junctional/pocket epithelia and in the lamina propria. A greater number of factor XIIIa+ dendritic cells in the lamina propria and CD1a+ dendritic cells in the oral epithelium were observed in gingivitis compared to the periodontitis group (p = 0.05). In the sulcular and junctional/pocket epithelia and in the lamina propria, the number of CD1a+ dendritic cells was similar in the gingivitis and periodontitis groups. In conclusion, the number of Langerhans' cells in the oral epithelium and interstitial dendritic cells in the lamina propria is increased in gingivitis compared to periodontitis, which may contribute to the different pattern of host response in these diseases.


Asunto(s)
Adulto , Femenino , Humanos , Masculino , Periodontitis Crónica/patología , Encía/patología , Gingivitis/patología , Células de Langerhans/patología , Antígenos CD1/análisis , Antígenos CD1/inmunología , Biopsia , Biomarcadores/análisis , Factor XIIIa/análisis , Factor XIIIa/inmunología , Gingivitis/inmunología , Células de Langerhans/inmunología , Monocitos , Estadísticas no Paramétricas
19.
Pathol Res Pract ; 203(10): 741-4, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-17673371

RESUMEN

Rosai-Dorfman disease or sinus histiocytosis with massive lymphadenopathy is a rare proliferative histiocytic disorder of the lymph nodes. Extranodal involvement occurs in a considerable number of cases; however, involvement of the breast is very rare, and it is even rarer for the lesion to be localized in the breast alone without affecting any other sites. This report describes the case of a 50-year-old Brazilian woman with a lump confined to her left breast that had clinical and radiological characteristics indistinguishable from cancer. The proliferation of histiocytes, displaying lymphophagocytosis and an S-100 protein immunophenotype on a core biopsy of the lesion, led to a diagnosis of Rosai-Dorfman disease and permitted conservative therapy. Recognition of this rare condition, when occurring at an unexpected site such as the breast, is difficult, and the correct diagnosis is important prior to therapeutic management.


Asunto(s)
Enfermedades de la Mama/diagnóstico , Neoplasias de la Mama/diagnóstico , Histiocitos/patología , Histiocitosis Sinusal/diagnóstico , Antígenos CD1/análisis , Enfermedades de la Mama/metabolismo , Enfermedades de la Mama/patología , Enfermedades de la Mama/cirugía , Neoplasias de la Mama/química , Neoplasias de la Mama/patología , Proliferación Celular , Diagnóstico Diferencial , Femenino , Histiocitos/química , Histiocitosis Sinusal/metabolismo , Histiocitosis Sinusal/patología , Histiocitosis Sinusal/cirugía , Humanos , Mamografía , Persona de Mediana Edad , Proteínas S100/análisis , Resultado del Tratamiento
20.
J Oral Pathol Med ; 31(7): 410-4, 2002 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-12165059

RESUMEN

BACKGROUND: Current evidence suggests that immunological mechanisms are involved in oral lichen planus (OLP) pathogenesis. The events implicate activated epithelia that comprise antigen-presenting Langerhans cells, immunocompetent keratinocytes and subepithelial inflammatory infiltrate. Also, the presence of a high density of leucocyte cells may occur for the expression of a variety of adhesion molecules. The aim of this study was to analyse the immunoexpression of some adhesion molecules as well as lymphocytic markers in order to determine the disease pathogenesis in a Venezuelan population. METHODS: The 18 OLP and 10 normal oral mucosa biopsies were immunostained for CD4, CD8, CD1a, LFA-1, VCAM-1 and ICAM-1. RESULTS: The results showed an increased number of CD4+, CD8+, CD1a+ cells in OLP. Serial sections showed CD4+ and CD8+ cells also expressed LFA-1. The expression of ICAM-1 and VCAM-1 were significantly higher in OLP. CONCLUSIONS: The immunological reaction begins with Langerhans cells activation, which presents an antigen to CD4+ lymphocytes. Those cells through ICAM-1 and LFA-1 promote epithelial destruction. Afterwards, cytokine production, ICAM-1 and VCAM-1 expression can activate CD8+ lymphocytes leading to the chronic form of the disease.


Asunto(s)
Liquen Plano Oral/inmunología , Antígenos CD1/análisis , Antígenos CD4/análisis , Linfocitos T CD4-Positivos/inmunología , Linfocitos T CD4-Positivos/patología , Antígenos CD8/análisis , Linfocitos T CD8-positivos/inmunología , Linfocitos T CD8-positivos/patología , Células Epiteliales/inmunología , Células Epiteliales/patología , Femenino , Humanos , Inmunocompetencia/inmunología , Molécula 1 de Adhesión Intercelular/análisis , Queratinocitos/inmunología , Queratinocitos/patología , Células de Langerhans/inmunología , Células de Langerhans/patología , Recuento de Leucocitos , Leucocitos/inmunología , Leucocitos/patología , Liquen Plano Oral/patología , Activación de Linfocitos/inmunología , Antígeno-1 Asociado a Función de Linfocito/análisis , Masculino , Persona de Mediana Edad , Mucosa Bucal/inmunología , Mucosa Bucal/patología , Estadística como Asunto , Estadísticas no Paramétricas , Linfocitos T/inmunología , Linfocitos T/patología , Molécula 1 de Adhesión Celular Vascular/análisis
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA