Caracterização de neutrófilos e células Natural Killer em pacientes pré e pós-operatório de cirurgia bariátrica
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Universidade Federal de Viçosa
Abstract
Introdução: A obesidade pode ser definida como um acúmulo anormal ou excessivo de tecido adiposo, sendo prejudicial à saúde do indivíduo, caracterizada por uma inflamação crônica de baixo grau, na qual são evidenciados elevados níveis de marcadores inflamatórios. Neste sentido, a cirurgia bariátrica pode proporcionar uma perda de peso significativa, melhora de parâmetros de saúde e está associado a um baixo risco de complicações inerentes à patologia. No tecido adiposo de pacientes com obesidade existe um grande número de células imunes, como os neutrófilos, monócitos e células natural killer (NK). Objetivos: Analisar e caracterizar os neutrófilos e células natural Killer de indivíduos com obesidade grave pré e pós- cirurgia bariátrica Métodos: Trata-se de um estudo transversal, realizado com pacientes no pré e pós-operatório de cirurgia bariátrica atendidos no ambulatório da Equipe de Terapia Nutricional da Obesidade Grave (ETNO) do Instituto Alfa de Gastroenterologia (IAG), no Hospital das Clínicas da Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brasil. O estudo faz parte de um projeto maior intitulado “Caracterização de marcadores da imunidade inata e adaptativa para monitoramento e acompanhamento da evolução clínica em obesos no pré e pós-operatório de cirurgia bariátrica”. Foram realizadas avaliações antropométricas, avaliação de células natural killers e neutrófilos por citometria de fluxo de pacientes no pré e pós- cirurgia bariátrica e um grupo controle, com um nível de IMC adequado. Foram utilizados os testes estatísticos de acordo com a normalidade dos dados e adotado o nível de significância estatística de 5%. Resultados: Este estudo demonstrou que a maioria dos participantes eram do sexo feminino (80,65%) com média de idade de 43 anos (24 - 59). Os pacientes do grupo pós-operatório apresentaram, após no mínimo de 6 meses da cirurgia bariátrica, uma perda média de 41 kg (22-63kg). O percentual de perda de excesso de peso foi de 67,56% (49,53-91,67%) e o IMC reduziu 10,41kg/m³, demonstrando assim um sucesso no pós-operatório. Os resultados demonstraram menor expressão de CD282 no grupo pré-bariátrico quando comparados com os grupos controle e pós-bariátrico. Foi possível observar, no grupo pré-bariátrico, correlação significativa negativa entre a expressão de IL-10 em neutrófilos e peso (ρ=-0,8182/p=0,0038), IMC (ρ=-0,8424/p=0,0022), TMB (ρ=- 0,6485/p=0,0425), e HDL (ρ=-0,7538/p=0,0118). No grupo pós-bariátrico, correlação significativa positiva entre a expressão de IL-10 em neutrófilos e massa magra (ρ=0,6099/p=0,0269), e negativa com massa gorda (ρ=-0,6099/p=0,0269) e menor frequência de células Natural Killer. Conclusão: Neste estudo, de modo geral, demonstramos evidências que o grupo pós-bariátrico possui a tendência de melhora na recuperação dos parâmetros imunológicos expressos pelos neutrófilos quando comparado aos indivíduos do grupo controle. Palavras-chave: Obesidade; Inflamação; Células Natural Killer; Neutrófilos; Citocinas; Cirurgia Bariátrica; IL-10.
Introduction: Obesity can be defined as an abnormal or excessive accumulation of adipose tissue, which is harmful to the individual's health, characterized by chronic low- grade inflammation, in which high levels of inflammatory markers are evident. In this sense, bariatric surgery can provide significant weight loss, improve health parameters and is associated with a low risk of complications inherent to the pathology. In the adipose tissue of patients with obesity there are a large number of immune cells, such as neutrophils, monocytes and natural killer (NK) cells. Objectives: To analyze and characterize neutrophils and natural killer cells in individuals with severe obesity before and after bariatric surgery. Methods: This is a cross-sectional study, carried out with patients in the pre- and post-operative period of bariatric surgery treated at the outpatient clinic of the Health Team. Nutritional Therapy for Severe Obesity (ETNO) at the Alfa Institute of Gastroenterology (IAG), at the Hospital das Clínicas of the Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil. The study is part of a larger project entitled “Characterization of markers of innate and adaptive immunity for monitoring and monitoring the clinical evolution of obese people in the pre- and postoperative period of bariatric surgery”. Anthropometric assessments were carried out, assessment of natural killer cells and neutrophils by flow cytometry of patients before and after bariatric surgery and a control group, with an adequate BMI level. Statistical tests were used according to the normality of the data and a statistical significance level of 5% was adopted. Results: This study demonstrated that the majority of participants were female (80.65%) with an average age of 43 years (24 - 59). Patients in the postoperative group presented, after at least 6 months of bariatric surgery, an average loss of 41 kg (22-63kg). The percentage of excess weight loss was 67.56% (49.53-91.67%) and the BMI reduced by 10.41kg/m³, thus demonstrating post-operative success. The results demonstrated lower expression of CD282 in the pre-bariatric group when compared to the control and post- bariatric groups. It was possible to observe, in the pre-bariatric group, a significant negative correlation between the expression of IL-10 in neutrophils and weight (ρ=- 0.8182/p=0.0038), BMI (ρ=-0.8424/p= 0.0022), BMR (ρ=-0.6485/p=0.0425), and HDL (ρ=-0.7538/p=0.0118). In the post-bariatric group, a significant positive correlation between the expression of IL-10 in neutrophils and lean mass (ρ=0.6099/p=0.0269), and a negative correlation with fat mass (ρ=-0.6099/p= 0.0269) and lower frequency of Natural Killer cells. Conclusion: In this study, in general, we demonstrated evidence that the post-bariatric group has a tendency to improve the recovery of immunological parameters expressed by neutrophils when compared to individuals in the control group. Keywords: Obesity; Inflammation; Natural Killer Cells; Neutrophils; cytokines; bariatric surgery; IL-10.
Introduction: Obesity can be defined as an abnormal or excessive accumulation of adipose tissue, which is harmful to the individual's health, characterized by chronic low- grade inflammation, in which high levels of inflammatory markers are evident. In this sense, bariatric surgery can provide significant weight loss, improve health parameters and is associated with a low risk of complications inherent to the pathology. In the adipose tissue of patients with obesity there are a large number of immune cells, such as neutrophils, monocytes and natural killer (NK) cells. Objectives: To analyze and characterize neutrophils and natural killer cells in individuals with severe obesity before and after bariatric surgery. Methods: This is a cross-sectional study, carried out with patients in the pre- and post-operative period of bariatric surgery treated at the outpatient clinic of the Health Team. Nutritional Therapy for Severe Obesity (ETNO) at the Alfa Institute of Gastroenterology (IAG), at the Hospital das Clínicas of the Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil. The study is part of a larger project entitled “Characterization of markers of innate and adaptive immunity for monitoring and monitoring the clinical evolution of obese people in the pre- and postoperative period of bariatric surgery”. Anthropometric assessments were carried out, assessment of natural killer cells and neutrophils by flow cytometry of patients before and after bariatric surgery and a control group, with an adequate BMI level. Statistical tests were used according to the normality of the data and a statistical significance level of 5% was adopted. Results: This study demonstrated that the majority of participants were female (80.65%) with an average age of 43 years (24 - 59). Patients in the postoperative group presented, after at least 6 months of bariatric surgery, an average loss of 41 kg (22-63kg). The percentage of excess weight loss was 67.56% (49.53-91.67%) and the BMI reduced by 10.41kg/m³, thus demonstrating post-operative success. The results demonstrated lower expression of CD282 in the pre-bariatric group when compared to the control and post- bariatric groups. It was possible to observe, in the pre-bariatric group, a significant negative correlation between the expression of IL-10 in neutrophils and weight (ρ=- 0.8182/p=0.0038), BMI (ρ=-0.8424/p= 0.0022), BMR (ρ=-0.6485/p=0.0425), and HDL (ρ=-0.7538/p=0.0118). In the post-bariatric group, a significant positive correlation between the expression of IL-10 in neutrophils and lean mass (ρ=0.6099/p=0.0269), and a negative correlation with fat mass (ρ=-0.6099/p= 0.0269) and lower frequency of Natural Killer cells. Conclusion: In this study, in general, we demonstrated evidence that the post-bariatric group has a tendency to improve the recovery of immunological parameters expressed by neutrophils when compared to individuals in the control group. Keywords: Obesity; Inflammation; Natural Killer Cells; Neutrophils; cytokines; bariatric surgery; IL-10.
Description
Keywords
Citation
SILVA, Daniela Aparecida. Caracterização de neutrófilos e células Natural Killer em pacientes pré e pós-operatório de cirurgia bariátrica. 2024. 60 f. Dissertação (Mestrado em Ciência da Nutrição) - Universidade Federal de Viçosa, Viçosa. 2024.
