The role of T regulatory cells in the immunopathogenesis of HIV: Clinical implications.

Human Immunodeficiency Virus (HIV) infection is among the most challenging issues in the healthcare system, presenting significant financial and hygiene problems with a wide range of clinical manifestations. Despite the hopeful outcomes of Antiretroviral Therapies (ARTs), the current strategies for the treatment of patients with HIV infection have not shown clinical significance for all subjects, which is mainly due to the complexity of the disease. Therefore, the need for collaborative and interdisciplinary research focused on deciphering the multifaceted cellular, and molecular immunopathogenesis of HIV remains essential in the development of innovative and more efficacious therapeutic approaches. T-regulatory (Treg) cells function as suppressors of effector T-cell responses contributing to the inhibition of autoimmune disorders and the limitation of chronic inflammatory diseases. Notably, these cells can play substantial roles in regulating immune responses, immunopathogenesis, viral persistence and disease progression, and affect therapeutic responses in HIV patients. In this review, we aim elucidating the role of T-regulatory cells (Tregs) in the immunopathogenesis of HIV, including immunological fatigue and seroconversion. In particular, the focus of the current study is exploration of novel immunotherapeutic approaches to target HIV or related co-infections.

Perfil comparativo do custo do tratamento entre pró-fármacos e os seus fármacos precursores / Comparative profile of the cost of treatment withdrugs and their prodrugs

A latenciação é uma importante ferramenta no processo de desenvolvimento de fármacos, pois através dela, diversas barreiras biológicas que limitam o uso de um agente terapêutico podem ser superadas. Assim, esta estratégia permite a reintrodução de substâncias anteriormente descartadas por suas propriedades indesejáveis e o aprimoramento de novos fármacos, antes mesmo que sejam lançados na terapêutica. Embora a latenciação apresente vantagens clínicas, não existem estudos demonstrando a vantagem econômica do uso de pró-fármacos em relação às substâncias precursoras. Dessa forma, o objetivo do presente trabalho foi elaborar um perfil comparativo do custo do tratamento entre pró-fármacos e seus respectivos fármacos precursores, disponíveis no mercado farmacêutico brasileiro, visando demonstrar a real importância da latenciação como ferramenta norteadora para o desenvolvimento de fármacos e, principalmente, a viabilidade financeira do uso de pró-fármacos. Constatou-se que seis do total de pró-fármacos analisados apresentaram-se financeiramente mais vantajosos que os seus precursores e, mesmo para os pró-fármacos que tiveram custo mais elevado, a vantagem clínica alcançada justifica sua utilização.

Prodrug design is an important tool in the drug discovery process, since many biological barriers that limit the use of a drug may be overcome by a prodrug precursor. This strategy allows the improvement of new drugs before they are marketed and also enables the reintroduction of substances previously discarded for their undesirable properties. Although clinical advantages of prodrug design are well-established, there are no studies demonstrating the economic benefits of using prodrugs rather than the intended drugs. The aim of this study was to elaborate a technical report on the relative cost of treatments carried out with prodrugs or with the related drugs. This study was intended to demonstrate the real importance of prodrug design as a guiding tool for drug development and the financial viability of the use of prodrugs. It was found that six of the analyzed prodrugs were financially advantageous compared to the actual drugs and that, even for the prodrugs that had a higher cost, the clinical advantage justified their therapeutic use.