ABSTRACT
PURPOSE : This study aimed to determine Cu/Zn ratio, nutritional and inflammatory status in patients during the perioperative period for colorectal cancer. METHODS: The study included patients with histological diagnosis of colorectal adenocarcinoma (Cancer Group, n=46) and healthy volunteers (Control Group, n=28). We determined habitual food intake, body composition, laboratory data of nutritional status, serum calprotectin and plasma Cu and Zn concentrations. Mann-Whitney U-test was performed between-group comparisons and Spearman correlation test for correlations between the variables. RESULTS: Individuals in the Cancer Group presented significantly lower BMI, fat mass, plasma hemoglobin, total protein and albumin as compared with the Control Group. Serum calprotectin[70.1 ng/mL (CI95% 55.8-84.5) vs.53.3 ng/mL (40.3-66.4), p=0.05], plasma Cu concentrations [120 µg/dL(CI95% 114-126) vs. 106 µg/dL(CI95% 98-114), p<0.01] and the Cu/Zn ratio [1.59 (CI95% 1.48-1.71)vs. 1.35 (CI95% 1.23-1.46), p=0.01]were higher in patients with colorectal cancer than in controls. Additionally, the Cancer Group showed negative correlations between the Cu/Zn ratio and Zn intake, hemoglobin, serum albumin, and positive correlation between the Cu/Zn ratio and serum calprotectin. CONCLUSION: These results indicate that an increased plasma Cu/Zn ratio and serum calprotectin, and decreased protein values may be a result of the systemic inflammatory response to the tumor process.
Subject(s)
Humans , Male , Female , Middle Aged , Aged , Zinc/blood , Colorectal Neoplasms/blood , Adenocarcinoma/blood , Nutritional Status , Copper/blood , Perioperative Period , Reference Values , Body Composition , Enzyme-Linked Immunosorbent Assay , Biomarkers/blood , Body Mass Index , Case-Control Studies , Risk Factors , Statistics, Nonparametric , Leukocyte L1 Antigen Complex/blood , Malnutrition , Eating , Inflammation/bloodABSTRACT
BackgroundNonalcoholic steatohepatitis is considered the hepatic manifestation of metabolic syndrome and it is particularly associated to the insulin resistance, hypertension, obesity and abnormalities in lipid and glucose metabolism.ObjectiveConsidering the importance of obesity and oxidative stress in the pathophysiology of nonalcoholic steatohepatitis, this study aimed to evaluate the presence and association of the obesity and oxidative stress in this pathology.MethodsFifteen outpatients with nonalcoholic steatohepatitis (nonalcoholic steatohepatitis group), diagnosed according to the histopathological findings from the liver biopsy, and 15 body mass index-matched subjects (non nonalcoholic steatohepatitis group) without nonalcoholic steatohepatitis were included. All volunteers were registered in a Brazilian University Hospital. Nutritional assessment (weight, height, body mass index and waist circumference) and biochemical analysis (fasting glucose, liver enzymes, lipid profile, leptin, superoxide dismutase, glutathione peroxidase, vitamins C and E, catalase and 8-isoprostane) were performed for all the participants. The student t test was used for statistical analysis, with P<0.05 as the significant factor.ResultsNonalcoholic steatohepatitis patients had higher fasting glucose, hepatic enzymes (serum aspartate aminotransaminase, alanine aminotransaminase, gamma glutamyl transferase, alkaline phosphatase), triglycerides and superoxide dismutase and lower glutathione peroxidase values than non nonalcoholic steatohepatitis individuals.ConclusionThis paper demonstrates that only the presence of obesity is not enough to trigger alterations in all the studied biomarkers. Despite the majority of oxidative stress markers being found to be similar in both conditions, the nonalcoholic steatohepatitis subjects could be slightly more affected than the non nonalcoholic steatohepatitis individuals.
ContextoEsteatohepatite não alcoólica é considerada uma manifestação hepática da síndrome metabólica e está particularmente associada com a resistência insulínica, hipertensão, obesidade, anormalidades no metabolismo lipídico e da glicose.ObjetivoConsiderando a importância da obesidade e do estresse oxidativo na fisiopatogenia da esteatohepatite não alcoólica, o objetivo deste estudo foi avaliar a associação e presença da obesidade e do estresse oxidativo nesta patologia.MétodosQuinze pacientes com esteatohepatite não alcoólica (grupo esteatohepatite não alcoólica), diagnosticados de acordo com os achados histopatológicos da biópsia hepática, e 15 indivíduos sem esteatohepatite não alcoólica com sobrepeso/obesidade (grupo sem esteatohepatite não alcoólica) foram incluídos. Todos os voluntários eram acompanhados em Hospital Universitário Brasileiro. Avaliação nutricional (peso, altura, índice de massa corporal e circunferência abdominal) e bioquímica (glicemia de jejum, enzimas hepáticas, lipidograma, leptina, superóxido dismutase, glutationa peroxidase, vitaminas C e E, catalase e 8-isoprostano) foram realizadas em todos os indivíduos. O teste t de Student foi usado para análise estatística considerando o P≤0,05 como significativo.ResultadosIndivíduos do Grupo esteatohepatite não alcoólica apresentaram valores significativamente maiores de glicemia, AST, ALT, Gama GT, fosfatase alcalina, triglicérides e superóxido dismutase e menor valor de glutationa peroxidase, quando comparados ao Grupo sem esteatohepatite não alcoólica.ConclusãoEste artigo demonstra que somente a presença da obesidade não é suficiente para provocar alterações nos biomarcadores estudados. Apesar da maioria dos marcadores de estresse oxidativo apresentarem-se similar nas duas condições, os pacientes com esteatohepatite não alcoólica podem apresentar-se levemente mais afetados que os indivíduos sem esteatohepatite não alcoólica.
Subject(s)
Adolescent , Adult , Aged , Female , Humans , Male , Middle Aged , Young Adult , Non-alcoholic Fatty Liver Disease/etiology , Obesity/complications , Oxidative Stress/physiology , Biomarkers/blood , Case-Control Studies , Non-alcoholic Fatty Liver Disease/blood , Non-alcoholic Fatty Liver Disease/physiopathology , Obesity/physiopathology , Risk FactorsABSTRACT
Changes in the metabolism of methionine can cause hyperhomocysteinemia, inducing a triad of atherosclerosis, hypertension, and increased oxidative stress. The generation of free radicals and oxidative damage to DNA is important in the liver damage caused by ethanol. In this study, the effect of methionine overload associated or otherwise with acute administration of ethanol on homocysteine values, damage to DNA, lipoperoxidation and vitamin E was evaluated. Thirty rats were divided into 3 groups: Group Ethanol 24 hours (EG24), Group Methionine 24 hours (MG24), and Group Methionine and Ethanol 24 hours (MEG24). TBARS, vitamin E, GS and, homocysteine values were determined and the Comet assay was carried out. Increased GSH, vitamin E and homocysteine levels were observed for MEG24, and increased TBARS were observed in EG24. The Comet assay showed an increase in DNA damage in EG24 and DNA protection in MEG24. The administration of ethanol decreased antioxidant levels and increased TBARS, indicating the occurrence of oxidative stress with possible DNA damage. The combination of methionine and ethanol had a protective effect against the ethanol-induced damage, but increased the levels of homocysteine.
Alterações no metabolismo da metionina podem ocasionar hiper-homocisteinemia, quadro indutivo de aterosclerose, hipertensão e aumento do estresse oxidativo. A geração de radicais livres e dano oxidativo ao DNA são importantes na injúria hepática provocada pelo etanol. Neste estudo avaliaram-se os efeitos da sobrecarga de metionina associada ou não à administração aguda de etanol sobre valores de homocisteína, dano ao DNA, lipoperoxidação e vitamina E. Foram utilizados 30 ratos Wistar distribuídos em 3 Grupos: Grupo Etanol 24 horas (GE24), Grupo Metionina 24 horas (GM24) e Grupo Metionina e Etanol 24 horas (GME24). Realizaram-se determinações hepáticas de SRATB, vitamina E, GSH, homocisteína e Teste do Cometa e determinações plasmáticas de GSH e homocisteína. Valores aumentados de GSH, vitamina E e homocisteína foram observados para o GME24, e de SRATB no GE24. O Teste do Cometa mostrou aumento do dano ao DNA no GE24 e proteção ao DNA no GME24. A administração de etanol diminuiu os níveis de antioxidantes e aumentou o de SRATB, indicando ocorrência de estresse oxidativo, podendo ocasionar dano ao DNA. A presença da metionina associada com o etanol agiu como protetora contra os danos do etanol, mas aumentou os níveis de homocisteína.