scholarly journals O PAPEL IMUNOMODULATÓRIO DOS HORMÔNIOS SEXUAIS NA COVID 19

2021 ◽  
Author(s):  
Gabriel Bessa Tibery Tonelli ◽  
Neslayne Louise Campiol ◽  
Manoel Henrique Carvalho ◽  
Bruno Pereira Garcia ◽  
Janne Marques Silveira
Keyword(s):  

INTRODUÇÃO: O vírus SARS-COV2 é um coronavírus responsável pela atual pandemia de síndrome respiratória aguda COVID-19, uma doença que ainda necessita de estudos para responder às diversas dúvidas levantadas pelas ciências da saúde. Neste contexto, encontra-se a imunomodulação desempenhada pelos hormônios sexuais, os quais determinam o diferente grau de acometimento de indivíduos do sexo masculino e feminino. Objetivo: por meio de uma revisão integrativa da literatura, avaliar a imunomodulação realizada pelos hormônios sexuais masculinos e femininos, expondo as alterações principais no sistema imunológico e seus impactos no paciente acometido por COVID-19. MATERIAL E MÉTODOS: levantamento de artigos indexados nas bases de dados PubMed, LILACS, SciELO e BVS a partir de 2019, por meio dos seguintes descritores: “estrogen” AND “covid 19”. Primariamente, obtiveram-se 209 referências. Após a exclusão de 22 fontes duplicadas e 167 referências que não atendiam aos critérios de inclusão/exclusão, restaram 20 artigos analisados no presente estudo. RESULTADOS: A presença superior dos níveis de estrogênio, quando relacionada ao COVID-19, atua como fator protetor para o sexo feminino, visto que tal hormônio apresenta um papel de ativação do sistema imunológico e possui interação com sistemas que modulam a homeostase vasomotora. Sabe-se que o estrogênio inibe a resposta vasoconstritora a vários estímulos e induz a vasodilatação da vasculatura pulmonar sob estresse, desta forma, atenua-se o impacto das microtromboses pulmonares do COVID-19 ao manter o fluxo microvascular. Outro ponto importante para o sexo feminino é a presença dobrada do cromossomo X, que contém o maior número de genes relacionados ao sistema imune em todo o genoma humano e também codifica receptores Toll-like que trabalham na detecção de ácidos nucleicos da SARS-CoV-2, dando às mulheres vantagem na geração de resposta imunológica. Entretanto, a testosterona e a progesterona fornecem uma supressão imunológica das respostas inatas e interferem negativamente a ação de células T citotóxicas e Natural Killers. CONCLUSÃO: Conclui-se que a presença do estrogênio, junto ao fato das mulheres apresentarem 2 cromossomos X em seus genes, faz com que o sexo feminino possua uma resposta imunológica ao COVID-19 mais rápida e eficaz.

2019 ◽  
Vol 10 (4) ◽  
pp. 71-79
Author(s):  
I. F. Shlyk ◽  
L. P. Sizyakina ◽  
R. V. Sidorov ◽  
S. V. Shlyk

Objective: to study the functional characteristics of innate immunity in the formation of postpericardial syndrome (PPS) in patients undergoing coronary artery bypass graft ing (CABG).Materials and methods: the study involved 60 people, 40 of them made up the main group of patients with coronary artery disease, which retrospectively aft er 1 month of observation was divided into 2 groups. Group I CABG and PPS, group II CABG without PPS. The control group consisted of 20 patients without IHD. Before surgery, aft er 5, 14 days and 1 month, the expression of toll-like receptors (TLRs) 2, 4, 9, the content of CD16+ and Granzyme B lymphocytes, the HCT test and serum α-defensin were evaluated in blood cells. Statistical analysis of the results of the study was carried out using the program Statistica 12.0 (StatSoft , USA). The difference in mean values between groups was evaluated by the Mann-Whitney test. Statistical signifi cance was considered signifi cant at p ≤ 0.05.Results: when comparing the initial indices of the main groups and the control group, an increase in the expression of TLRs 2, 4, 9 was revealed. An increase in the content of CD16+, as well as an increase in the cytotoxic activity of natural killers and an increase in the production of α-defensin.Conclusions: on the basis of the study, activation of the cellular link of innate immunity, an increase in the cytotoxic potential of natural killers and a signifi cantly high level of α-defensin both before and aft er CABG were revealed, which can play an important role in the development of PPS. 


1999 ◽  
Vol 80 (4) ◽  
pp. 253-255
Author(s):  
В. А. Shamov ◽  
A. G. Shamova ◽  
T. G. Malanicheva

In children aged 10 to 17 with atopic dermatitis the following changes are revealed: the decrease of the content of CD3+-cells, CD8+-cells, natural killers, CH50, the increase of immunoregulator index indicators, CD19+-cells, igg, ige circulating immune complexes. More pronounced disorders of the immune status are found in boys and girls aged 13 to 17 than in children aged 10 to 12. After the treatment the favourable dynamics of the indicators of CD8+-cells, immunoregulator index, concentration of igg, ige and circulating immune complexes is found.


Immunity ◽  
2020 ◽  
Vol 52 (6) ◽  
pp. 895-897
Author(s):  
Kyohei Nakamura ◽  
Mark J. Smyth
Keyword(s):  

2014 ◽  
Vol 15 (6) ◽  
pp. 531-532 ◽  
Author(s):  
Thomas Ciucci ◽  
Rémy Bosselut
Keyword(s):  

1994 ◽  
Vol 117 (3) ◽  
pp. 283-287 ◽  
Author(s):  
S. B. Cheknev ◽  
D. V. Kuyavskaya ◽  
S. Zh. Toksambaeva ◽  
E. B. Mysyakin ◽  
A. Ya. Kul'berg
Keyword(s):  

2000 ◽  
Vol 8 (1) ◽  
pp. 47-60 ◽  
Author(s):  
Omar R. Fagoaga ◽  
Steven. M. Yellon ◽  
Sandra. L. Nehlsen-Cannarella

The goal of this study was to systematically investigate the ontogeny of lymphoid populations throughout postnatal development. In CD-1 mice, peak lymphocyte numbers occurred in blood on postnatal day 10 (dl0) including those for natural killers (NK1.1), B cells (CD19), T helper (CD3CD4), naïve T helper (CD4CD62LposCD44low), memory T helper (CD4CD62LnegCD44high), and T cytotoxic (CD3CD8) cells. As percent of total lymphocytes, peaks were achieved by d10 for all T helper subtypes but not B cells which declined to a nadir. In spleen, lymphocyte numbers increased exponentially after d10. Proportionately, NK and T cells peaked on d10, declined by d20, and increased 2–3-fold by d45. Naive T cells constituted the majority of lymphocytes during development while memory cells gained to 2.2% (blood) and 12 % (spleen) by d20. C57BL/6 mice had similar profiles except that the B cell nadir and T cell subset peaks were at d5. Peripheralization of critical numbers of lymphocytes by d10, and importantly, development of a repertoire of memory cells by d20, may define immune response capabilities that close the period of immaturity for the neonate.


2015 ◽  
Vol 21 (3) ◽  
pp. 207-208 ◽  
Author(s):  
Amanda B. Keener
Keyword(s):  

2014 ◽  
Vol 11 (4) ◽  
pp. 180-180
Author(s):  
M. Teresa Villanueva
Keyword(s):  

2014 ◽  
Vol 2 (S3) ◽  
Author(s):  
Roman Uzhachenko ◽  
Shawn Goodwin ◽  
Menaka Thounaojam ◽  
William Hofmeister ◽  
Anil Shanker

Sign in / Sign up

Export Citation Format

Share Document