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1.
Rev. Soc. Bras. Clín. Méd ; 17(1): 41-46, jan.-mar. 2019. tab.
Article in Portuguese | LILACS | ID: biblio-1026187

ABSTRACT

A doença de Crohn se caracteriza como uma doença inflamatória, que acomete qualquer porção do trato gastrintestinal, resultante da desrregulação imunológica, gerenciada por fatores endógenos e exógenos. As formas de abordagem terapêutica da doença variam conforme sua apresentação clínica e gravidade, bem como o impacto na qualidade de vida do portador. A terapia biológica vem se tornando uma das principais classes utilizadas no contexto desta enfermidade, mas não está claro quando deve ser iniciada ou em que momento a própria doença deve ser considerada moderada ou grave. Sua forma de apresentação multiforme dificulta a classificação dos pacientes nestes grupos. Neste trabalho, foi realizada revisão de literatura sobre a introdução de terapia biológica como tratamento da doença inflamatória intestinal em curso. (AU)


Crohn's Disease (CD) is an inflammatory disease that can affect any portion of the gastrointestinal tract, caused by immune dysregulation, managed by endogenous and exogenous factors. The forms of therapeutic approach of the disease vary significantly according to its clinical presentation and severity, as well as to the impact on patient's quality of life. Biologic therapy has become one of the main classes used in the context of this disease; however, when it should be initiated or at what time the disease itself should be considered moderate or severe is not clear. Its multiform presentation makes it difficult to classify patients in these groups. In this work, a literature review was carried out about the introduction of the biologic therapy as a treatment of the ongoing inflammatory bowel disease. (AU)


Subject(s)
Humans , Biological Therapy , Crohn Disease/therapy , Autoimmune Diseases/drug therapy , Gastrointestinal Agents/therapeutic use , Crohn Disease/physiopathology , Crohn Disease/history , Crohn Disease/drug therapy , Integrins/antagonists & inhibitors , Interleukins/antagonists & inhibitors , Tumor Necrosis Factor-alpha/antagonists & inhibitors , Drug-Related Side Effects and Adverse Reactions , Antibodies, Monoclonal, Humanized/therapeutic use , Social Determinants of Health , Adalimumab/therapeutic use , Infliximab/therapeutic use , Decision Making, Shared , Disinformation , Anti-Inflammatory Agents/therapeutic use
2.
Arq. gastroenterol ; 55(2): 198-200, Apr.-June 2018. graf
Article in English | LILACS | ID: biblio-1038706

ABSTRACT

ABSTRACT Janus kinases inhibitors have already been incorporated into the management of immune-mediated diseases, such as rheumatoid arthritis, and are being investigated for the treatment of psoriasis and inflammatory bowel diseases, both ulcerative colitis and Crohn's disease. Tofacitinib is an oral small-molecule drug that inhibits Janus kinases 1, Janus kinases 3, and, to a lesser extent, Janus kinases 2. This inhibition ends up blocking signals for several inflammatory cytokines that are involved in the pathogenesis of inflammatory bowel diseases and play a role in many immune signaling routes, including lymphocyte activation, function, and proliferation. We report a patient with active ulcerative colitis with primary non-response to three biologics (infliximab, adalimumab and vedolizumab), with different mechanisms of action, who refused surgical treatment and had a favorable response to tofacitinib with clinical and endoscopic remission. No adverse events were observed with the use of the agent. This case illustrates the difficulties we may face regarding the identification of the expression of proper mechanism of action involved in the pathogenesis of ulcerative colitis patients and the importance of having another treatment option with different mechanism of action, like tofacitinib.


RESUMO Os inibidores das Janus kinases (JAK) têm sido incorporados ao tratamento de doenças imunomediadas, como artrite reumatoide e, além disso, têm sido testados no tratamento da psoríase e doenças inflamatórias intestinais, tanto na retocolite ulcerativa quanto na doença de Crohn. Tofacitinibe é uma droga do grupo das pequenas moléculas de uso oral que inibe as Janus kinases 1 e 3 e, em menor grau, a Janus kinases 2. Esta inibição promove o bloqueio de uma série de citocinas pró-inflamatórias que estão envolvidas na patogênese das doenças inflamatórias intestinais e desempenham importante papel nos processos imunes, tais como ativação, função e proliferação linfocitária. Nesta presente comunicação, relatamos um caso de um paciente portador de retocolite ulcerativa refratária a três agentes biológicos (infliximabe, adalimumabe e vedolizumabe), com diferentes mecanismos de ação, que recusou o tratamento cirúrgico, porém, apresentou boa resposta com o uso de tofacitinibe, com remissão clínica e endoscópica. Não foram evidenciados efeitos colaterais com a droga. O presente caso ilustra as dificuldades que podemos enfrentar em relação à identificação da expressão do correto mecanismo de ação envolvido na patogênese dos pacientes com retocolite ulcerativa e a importância de um novo agente terapêutico com diferente mecanismo de ação, como o tofacitinibe.


Subject(s)
Humans , Male , Adult , Piperidines/therapeutic use , Colitis, Ulcerative/drug therapy , Integrins/therapeutic use , Tumor Necrosis Factor-alpha/therapeutic use , Protein Kinase Inhibitors/therapeutic use , Pyrimidines/therapeutic use , Pyrroles/therapeutic use , Integrins/antagonists & inhibitors , Tumor Necrosis Factor-alpha/antagonists & inhibitors , Infliximab/therapeutic use
3.
Rev. peru. med. exp. salud publica ; 29(3): 396-401, jul.-sept. 2012. ilus, tab
Article in Spanish | LILACS, LIPECS | ID: lil-653974

ABSTRACT

El desarrollo del cáncer es posible en la medida que las células tumorales proliferen, se dispersen e invadan otros tejidos del cuerpo. Las integrinas son una familia de receptores heterodiméricos de superficie celular que cumplen un papel crucial en el desarrollo de la angiogénesis, crecimiento y metástasis de un tumor señalándolas como un atractivo blanco terapéutico. Los venenos de serpientes contienen péptidos de bajo peso molecular conocidos como desintegrinas, las que se unen con una alta afinidad a las integrinas e inhiben su accionar en un proceso cancerígeno. En el siguiente articulo revisamos los resultados de investigaciones, tanto in vitro como in vivo, que han mostrado resultados promisorios, por lo cual el uso de las desintegrinas podrían constituir una alternativa promisoria para el tratamiento de diversas neoplasias.


Cancer can develop to the extent tumor cells grow, divide and grow into other body tissues. Integrins are a family of cell-surface heterodimeric receptors that play an important role in the development of tumor angiogenesis, growth and metastasis, thus being recognized as an attractive therapeutic target. Snake venom contains low-molecular weight peptides known as “disintegrins” that bind to integrins with high affinity, and prevent their action in cancer. In the next article, we go over the results of investigations, both in vitro and in vivo, which have shown promising results, thus revealing that the use of disintegrins could be a promising alternative for the treatment of different neoplasias.


Subject(s)
Humans , Disintegrins/pharmacology , Disintegrins/therapeutic use , Integrins/antagonists & inhibitors , Neoplasms/drug therapy , Snake Venoms , Disintegrins/analysis , Integrins/physiology , Neoplasms/etiology , Neovascularization, Pathologic , Snake Venoms/chemistry
4.
Int. braz. j. urol ; 37(3): 302-306, May-June 2011.
Article in English | LILACS | ID: lil-596003

ABSTRACT

During prostate carcinogenesis the cellular adhesion molecules, i.e.; integrins and cadherins mediate aberrant interactions between glandular epithelial cells and the extracellular matrix. Several integrin α subunits are down-regulated, while β subunits are up-regulated. The expression of several cadherins and catenins has specific prognostic value. There is an association between the expression of the E-cadherin/catenin complex and high grade prostate cancer. Clinical trials evaluating the efficacy of integrin antagonists are ongoing with promising results. In this article we update the role of integrins and cadherins in prostate carcinogenesis and evaluate the therapeutic potential of their manipulation.


Subject(s)
Humans , Male , Cadherins/metabolism , Integrins/metabolism , Neoplasm Proteins/metabolism , Prostatic Neoplasms/metabolism , Integrins/antagonists & inhibitors , Neoplasm Proteins/antagonists & inhibitors , Prostatic Neoplasms/drug therapy
5.
Rev. méd. hondur ; 75(1): 4-13, ene.-mar. 2007. ilus, graf
Article in Spanish | LILACS | ID: lil-476363

ABSTRACT

El presente estudio se basó en el hecho de que el factor tisular (TF), la proteína humana inductora de la coagulación es el principal disparador de la coagulación sanguínea. El objetivo de este trabajo fue demostrar en un modelo animal la factibilidad de tratar tumores sólidos humanos activando la coagulación e inhibiendo el crecimiento tumoral mediante infarto del mismo. Demostrar que el factor tisular truncado(tTF) recupera su capacidad inductora de la coagulación In vitro como In vivo y que fusionado al péptido RGD (tTF-RGD) en su carbono terminal hace blanco en marcadores de la angiogenesis presentes en el endotelio vascular tumoral no así en tejidos normales, como un novedoso abordaje en cáncer. Utilizando para la investigación dos líneas tumorales humanas (M21 y CCL-185) xenotransplantadas cada una en grupos de 24 ratones cada vez y distribuidos en grupos de 8 cada uno para las terapias con tTF-RGD, tTF y solución salina, respectivamente; En conclusión este trabajo muestra por primera vez que la caracterización específica del tTF-RGD en su carbono terminal le permite activar la coagulación selectiva, trombosis e infarto del tejido tumoral, inhibiendo en 100% el crecimiento de tumores humanos en ratones y sin efectos adversos significativos...


Subject(s)
Animals , Mice , Rats , Blood Coagulation/physiology , Integrins/antagonists & inhibitors , Thrombosis/pathology , Blood Coagulation Factor Inhibitors , Neoplasms, Vascular Tissue/pathology , Neoplasms/pathology
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