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2.
Hum Immunol ; 69(1): 9-15, 2008 Jan.
Article in English | MEDLINE | ID: mdl-18295670

ABSTRACT

The purpose of this study was to examine the expression of human leukocyte antigen-G (HLA-G) in patients with systemic lupus erythematosus (SLE) and its relation with interleukin-10 (IL-10) production. The study included 50 female SLE patients and 59 healthy female donors. HLA-G expression in peripheral blood and cutaneous biopsies was determined by flow cytometry and immunohistochemistry, respectively. Soluble HLA-G (sHLA-G) and IL-10 were quantified in serum samples by enzyme-linked immunosorbent assay. SLE patients presented with serum sHLA-G and IL-10 levels significantly higher than that observed in controls (median [interquartile range (IQR)] = 43.6 U/ml [23.2-150.2] vs 26.84 U/ml [6.0-45.2], p = 0.004; and 1.4 pg/ml [0-2.3] vs 0 pg/ml [0-1.5], p = 0.01, respectively). But no correlation was observed between sHLA-G and both IL-10 levels and the disease activity index for SLE patients. The expression of membrane HLA-G in peripheral lymphocytes from SLE patients was low, but higher than in controls (median [IQR] = 1.5% [0.6-1.8] and 0.3% [0.2-0.8], respectively; p = 0.02). Finally, these findings were in accordance with the weak expression of HLA-G in skin biopsies. Despite the fact that patients present higher levels of HLA-G than healthy controls, which suggests a possible relevance of this molecule in SLE, it seems not to be related to IL-10 production or disease activity.


Subject(s)
HLA Antigens/metabolism , Histocompatibility Antigens Class I/metabolism , Lupus Erythematosus, Systemic/immunology , Adult , Cell Line, Tumor , Female , HLA Antigens/blood , HLA-G Antigens , Histocompatibility Antigens Class I/blood , Humans , Interleukin-10/blood , Lupus Erythematosus, Systemic/diagnosis , Lymphocytes/immunology , Middle Aged , Skin/immunology
3.
Rev. esp. patol ; 37(2): 129-138, abr. 2004. ilus
Article in Es | IBECS | ID: ibc-37533

ABSTRACT

El linfoma Hodgkin es uno de los linfomas malignos más frecuentes en los países occidentales. Se caracteriza morfológicamente por la especial composición del infiltrado, en el que las células neoplásicas son minoritarias, siendo mayoritario el componente no neoplásico acompañante. En base a la morfología de las células neoplásicas, al inmunofenotipo y a la composición del infiltrado inflamatorio acompañante, se reconocen dos entidades biológicamente distintas, el linfoma Hodgkin clásico y el linfoma Hodgkin predominio linfocítico nodular (AU)


Subject(s)
Humans , Hodgkin Disease/pathology , Immunohistochemistry/methods , Hodgkin Disease/classification , Immunophenotyping/methods , Herpesvirus 4, Human/pathogenicity , Reed-Sternberg Cells/pathology
4.
Rev. esp. patol ; 35(4): 543-546, oct.-dic. 2002. graf
Article in Spanish | IBECS | ID: ibc-140690

ABSTRACT

Introducción: Establecer la diferencia entre poblaciones linfocitarias monoclonales y reactivas puede ser de gran ayuda en el diagnóstico del linfoma cerebral primario (LCP), especialmente en pequeñas muestras obtenidas por biopsia estereotáxica. El objetivo de este estudio ha sido evaluar la frecuencia de reordenamientos clonales del gen de la cadena pesada de las inmunoglobulinas (IgH) en el LCP. Métodos: Se han estudiado 24 LCP, 16 en pacientes inmunocompetentes y 8 asociados a SIDA. Mediante el método de reacción en cadena de la polimerasa (PCR) se analizó el gen IgH utilizando ADN extraído de tejido fijado en formol e incluido en parafina. Para ello se amplificaron las regiones CDR II y CDR III de dicho gen mediante cebadores consenso para las regiones VH (Fr2 y Fr3, respectivamente) y JH (LJH y VLJH). Resultados: El análisis molecular confirmó la existencia de clones de células B en un importante numero de casos de LCP. Al usar ambas combinaciones de cebadores (Fr2 y Fr3) se detectaron reordenamientos clonales del gen IgH en 19 de los 24 casos (79%), observándose en 5 de éstos un patrón biclonal debido a la presencia de dos bandas discretas con Fr3. La frecuencia de detección de clonalidad fue similar en los dos grupos de pacientes. Conclusiones: Nuestras observaciones apoyan que el estudio de la clonalidad del gen IgH mediante PCR en biopsias incluidas en parafina es de utilidad en el diagnóstico del LCP (AU)


Introduction: To determine differences between monoclonal and reactive lymphoid populations may be a great help in the diagnosis of primary brain lymphoma (PBL). The aim of this study was to evaluate the frequency of clonal immunoglobulin heavy chain (IgH) gene rearrangements in PBL. Methods: Twenty-four PBL were studied, 16 of them from immunocompetent patients and another 8 from AIDS patients. DNA was extracted from formalin-fixed, paraffin- embedded tissue. IgH gene rearrangements were analyzed using the polymerase chain reaction method (PCR) by amplifying CDRII and CDRIII regions using consensus primers directed to framework regions VH (Fr2 and Fr3 respectively) and JH (LJH and VLJH). Results: Molecular analysis confirmed the existence of B-cell clones in an important number of cases of PBL. Using both primer combinations (Fr2 and Fr3) we detected clonal IgH gene rearrangements in 19 of the 24 cases (79%), and 5 of these cases showed a biclonal pattern due to the presence of two discrete bands with Fr3. The frequency of detection of clonality was similar in both groups of patients. Conclusions: Our data confirm that PCR analysis of IgH rearrangements in paraffin-embedded biopsies is useful in the diagnosis of PBL (AU)


Subject(s)
Humans , Lymphoma/pathology , Brain Neoplasms/pathology , Gene Rearrangement , Cloning, Molecular , Polymerase Chain Reaction/methods , HIV Infections/complications
5.
Med Clin (Barc) ; 119(7): 241-4, 2002 Sep 07.
Article in Spanish | MEDLINE | ID: mdl-12236982

ABSTRACT

BACKGROUND: The purposes of this study were: to study the presence of human herpesvirus-8 (HHV-8) in different Kaposi's sarcoma (KS) epidemiological groups, multiple myeloma (MM), and immunodeficiency-associated lymphoid proliferations; to investigate the potential sexual transmission of HHV-8 by analyzing its presence in women from the general population, human immunodeficiency virus (HIV) seropositive women, and prostitutes; and to establish a reliable and efficient PCR strategy for the detection of HHV-8. PATIENTS AND METHODS: HHV-8 detection was performed by PCR and positive cases were confirmed by automatic bi-directional sequencing. We selected 25 KS, 70 immunodeficiency associated non-Hodgkin's lymphomas (NHL), 30 HIV-positive Hodgkin's lymphomas (HL), and 2 primary effusion lymphomas (PEL). Bone marrow aspirates were available from 41 MM, 9 monoclonal gammopathies of undetermined significance and 24 patients with other disorders. Bone marrow dendritic cell cultures from 12 MM patients were also performed. Cells from cervical, anal, and oral cavity scrapes were examined for the presence of HHV-8 in 40 control women, 10 HIV-seropositive women, and 20 HIV-seronegative prostitutes. Serologic tests were also performed. RESULTS: HHV-8 was specifically detected in 100% KS and PEL, and in 5.7% immunodeficiency associated NHL. All cases of HIV-HL and MM were HHV-8 negative. Antibodies against HHV-8 were found in 10% of control women, 10% HIV-positive women, and 25% prostitutes. Only 1 sample was positive for HHV-8 by PCR. CONCLUSIONS: HHV-8 is associated with all epidemiological forms of KS; HHV-8 does not contribute to the pathogenesis of MM, and this virus is not ubiquitous in the human population. Seroprevalence of HHV-8 is increased in prostitutes, although this may partially be attributed to the geographical origin. For a reliable PCR detection of HHV-8, it is necessary to target different regions of the viral genome and to sequence amplification products.


Subject(s)
Herpesviridae Infections/epidemiology , Herpesvirus 8, Human/isolation & purification , Lymphoma/virology , Multiple Myeloma/virology , Sarcoma, Kaposi/virology , Anal Canal/virology , Cervix Uteri/virology , Female , Herpesviridae Infections/immunology , Herpesviridae Infections/transmission , Humans , Immunocompetence , Immunocompromised Host , Lymphoma/immunology , Lymphoproliferative Disorders/immunology , Lymphoproliferative Disorders/virology , Mouth Mucosa/virology , Multiple Myeloma/immunology , Polymerase Chain Reaction , Sarcoma, Kaposi/immunology , Seroepidemiologic Studies , Sex Work , Sexually Transmitted Diseases, Viral
6.
Med. clín (Ed. impr.) ; 119(7): 241-244, sept. 2002.
Article in Es | IBECS | ID: ibc-13213

ABSTRACT

FUNDAMENTO: Estudiar la presencia del virus herpes humano tipo-8 (VHH-8) en distintas variantes epidemiológicas de sarcoma de Kaposi (SK), en el mieloma múltiple (MM) y en procesos linfoproliferativos en pacientes inmunodeprimidos. Investigar la posible transmisión sexual del VHH-8 estudiando su presencia en mujeres control, seropositivas para el virus de la inmunodeficiencia humana (VIH) y prostitutas. Determinar cuál es la estrategia más adecuada para la detección mediante reacción en cadena de la polimerasa (PCR) del VHH-8. PACIENTES Y MÉTODO: El genoma del VHH-8 se detectó mediante PCR y secuenciación directa. Se seleccionaron 25 SK, 70 linfomas no hodgkinianos (LNH) en pacientes con inmunodeficiencia, 30 linfomas de Hodgkin (LH) en infectados por el VIH y 2 linfomas primarios de cavidades (LPC). Se dispuso de aspirados medulares de 41 pacientes con MM, 9 con gammapatías monoclonales de significado incierto y 24 enfermedades diferentes, así como de cultivos de células dendríticas de 12 MM. Se estudió la presencia del VHH-8 en células exfoliadas de cérvix y mucosas anal y oral de 40 mujeres control, 10 infectados por el VIH y 20 prostitutas sin infección por el VIH, y se realizaron también análisis serológicos. RESULTADOS: Se detectó de forma específica el VHH-8 en el 100 por ciento de los SK y LPC y en el 5,7 por ciento de los LNH asociados a inmunodeficiencia. Todos los LH infectados por el VIH y los MM fueron negativos. La serología fue positiva en el 10 por ciento de las mujeres control, el 10 por ciento de las infectadas por el VIH y el 25 por ciento de las prostitutas, y se detectó genoma viral sólo en 1 caso. CONCLUSIONES: El VHH-8 se asocia con todas las variantes de SK, no está implicado en la etiopatogenia del MM y no se distribuye de forma ubicua. La seroprevalencia es mayor en las prostitutas aunque esto puede deberse a causas geográficas. Para descartar falsos positivos es necesario combinar distintas PCR, preferiblemente no acotadas, y secuenciar los productos de amplificación. (AU)


Subject(s)
Child , Female , Humans , Sarcoma, Kaposi , T-Lymphocytes , Polymerase Chain Reaction , CD4-CD8 Ratio , Immunocompromised Host , HIV Infections , Seroepidemiologic Studies , Cytokines , Infectious Disease Transmission, Vertical , Herpesvirus 8, Human , Disease Progression , Multiple Myeloma , Mouth Mucosa , Retrospective Studies , Sex Work , Cervix Uteri , Cross-Sectional Studies , Herpesviridae Infections , Lymphoma , Immunity, Cellular , Lymphoproliferative Disorders , Lymphocyte Activation , Immunocompetence , Sexually Transmitted Diseases, Viral , Anal Canal
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