ABSTRACT
INTRODUCTION: Previous studies have detected mitochondrial alterations in tissues of individuals with obesity and type 2 diabetes mellitus (T2DM). Metabolic surgery could be an effective treatment to improve mitochondrial morphology and reduce oxidative stress (OS). METHODS: An experimental study was carried out using 48 male Wistar rats, divided into 6 groups (n = 8): control (C), induced Metabolic Syndrome (MS); intervention with sleeve gastrectomy (SG), MS + SG with 6 weeks postoperatively (MS + SG6), MS + SG with 12 weeks postoperatively (MS + SG12), and MS + SG with 24 weeks postoperatively (MS + SG24). Biochemical markers indicative of MS (glycemia, cholesterol, and triglyceride levels) and oxidative stress markers (nitric oxide levels, Superoxide dismutase and Myeloperoxidase activity) were determined. To study mitochondrial morphology, tissue sections of the thoracic aorta, stomach, liver, heart, and kidney were observed by electron microscopy. RESULTS: MS group exhibited elevated glycemic values and dyslipidemia. SG and MS + SG groups showed improvements in glycemia and lipid profiles compared to MS. OS biomarkers indicated reduced oxidative stress in SG and MS + SG groups compared to MS. Electron microscopy revealed mitochondrial alterations in MS. SG group showed no changes compared to the control. MS + SG6 and MS + SG12 groups showed a recovery of mitochondrial morphology until reaching images similar to the control in MS + SG24. CONCLUSION: Metabolic surgery could improve mitochondrial function by restoring mitochondrial morphology and architecture and, consequently, reducing systemic oxidative stress and remitting associated metabolic alterations.
Subject(s)
Gastrectomy , Metabolic Syndrome , Mitochondria , Oxidative Stress , Rats, Wistar , Animals , Metabolic Syndrome/metabolism , Male , Rats , Mitochondria/metabolism , Disease Models, Animal , Blood Glucose/metabolism , Biomarkers/metabolism , Biomarkers/bloodABSTRACT
OBJETIVO: Evaluar la reproducibilidad y la seguridad de un programa de cirugía colorrectal laparoscópica en dos centros de Sudamérica. MÉTODO: Se realizó un estudio analítico-descriptivo. Se revisaron retrospectivamente los registros clínicos de pacientes sometidos a cirugía videolaparoscópica colorrectal desde el año 2012 hasta el año 2018, en dos centros académicos de tercer nivel argentinos. Se analizaron datos demográficos, indicaciones y tiempos quirúrgicos, tasa de conversión, evolución posoperatoria, morbimortalidad y resecabilidad oncológica, y se comparó con el abordaje convencional. RESULTADOS: Se realizaron 505 cirugías. La edad media de los pacientes fue de 63.4 años y el 50.9% eran hombres. El tiempo operatorio medio fue de 175 minutos. La principal indicación fue cáncer de colon. La incidencia de conversión fue del 9.5%. El promedio de ganglios por pieza quirúrgica en patología neoplásica fue de 15.9. La morbilidad fue del 35.4%, en su mayoría complicaciones menores. La tasa de fístulas fue del 11.7%. La mortalidad a 30 días fue del 2.5%. CONCLUSIÓN: La cirugía colorrectal laparoscópica podría representar una opción segura y reproducible en un centro de tercer nivel de un país en desarrollo. OBJECTIVE: To evaluate the feasibility and safeness of a colorectal laparoscopic program in two centers form South America. METHOD: We retrospectively review the records of patients who underwent laparoscopic colorectal surgery from 2012 to 2018 in two tertiary care academic centers. Surgical indication, operative time, conversion rate, lymph nodes harvested, surgical margins and complications were analyzed. This results were then compared to the open approach. RESULTS: We collected data from 505 patients, mean age 63.4, 50.9% male. The most frequent indication was colon cancer, mean operative time was 175 minutes. Conversion rate was 9.5%, mean nodes harvested was 15.9 with free resection margins in every case. Morbidity was 35.4% at 30 days, most of them were minor complications. The leak rate was 11.7 %. The 30-day mortality was 2.5%. CONCLUSION: The laparoscopic approach for colorectal surgery might represent a safe and feasible option in an tertiary care hospital from a developing country.
Subject(s)
Colonic Neoplasms , Laparoscopy , Female , Humans , Male , Middle Aged , Retrospective Studies , Tertiary Care Centers , Tertiary HealthcareABSTRACT
El mielolipoma es un tumor benigno de baja incidencia cuya localización más frecuente son las glándulas suprarrenales. Histológicamente se caracteriza por células con precursores mieloides y eritroides mezcladas con tejido adiposo maduro. El diagnóstico en general es incidental en una prueba de imagen. Clínicamente cursa asintomático, aunque los de mayor tamaño tienen más riesgo de complicaciones como sangrado o efecto de masa. Los hallazgos incidentales < 4 cm se deben controlar con imágenes; los > 7 cm, o que generen síntomas, deben ser tratados de forma quirúrgica. Se reporta un caso de mielolipoma extrasuprarrenal en un paciente de 78 años.Myelolipoma is a relatively rare benign tumor which is most commonly located in the adrenal glands. Histologically is characterized by eritroid and myeloid precursor cells intermixed with mature adipose tissue. The diagnosis is generally incidental in abdominal imaging studies. Clinically most are asymptomatic, nevertheless larger tumors are at greater risk for complications such as hemorrhage or compression of surrounding structures. Incidental findings smaller than 4 cm should be followed-up by imaging. Tumors measuring more than 7 cm or those that are symptomatic a surgical approach is mandated. We present the case of a 78-year-old man with an extra-adrenal myelolipoma.
Subject(s)
Aged , Humans , MaleABSTRACT
BACKGROUND: Smoking cessation had been typically associated with weight gain. So far, there are no reports documenting the relationship between weight loss after bariatric surgery and smoking habit. The objective of the study was to establish the relationship between weight loss and smoking habit in patients undergoing bariatric surgery and to analyze weight loss on severe smokers and on those patients who stopped smoking during the postoperative period. METHODS: All patients undergoing laparoscopic sleeve gastrectomy (LSG) with at least 2-year follow-up were included. Patients were divided into three groups: (A) smokers, (B) ex-smokers, and (C) non-smokers. Demographics and weight loss at 6, 12, and 24 months were analyzed. Smokers were subdivided for further analysis into the following: group A1: heavy smokers, group A2: non-heavy smokers, group A3: active smokers after surgery, and group A4: quitters after surgery. Chi-square test was used for statistics. RESULTS: One hundred eighty-four patients were included; group A: 62 patients, group B: 57 patients, and group C: 65 patients. Mean BMI was 34 ± 6, 31 ± 6, and 31 ± 6 kg/m2; mean %EWL was 63 ± 18, 76 ± 21, and 74 ± 22 % at 6, 12, and 24 months, respectively. The subgroup analysis showed the following composition: group A1: 19 patients, group A2: 43 patients, group A3: 42 patients, and group A4: 20 patients. Weight loss difference among groups and subgroups was statistically non-significant. CONCLUSIONS: Our study shows that weight loss evolution was independent from smoking habit. Neither smoking cessation during the postoperative period nor smoking severity could be related to weight loss after LSG.
