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1.
J Magn Reson Imaging ; 37(5): 1144-50, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23124651

RESUMEN

PURPOSE: To present software for supervised automatic quantification of visceral and subcutaneous adipose tissue (VAT, SAT) and evaluates its performance in terms of reliability, interobserver variation, and processing time, since fully automatic segmentation of fat-fraction magnetic resonance imaging (MRI) is fast but susceptible to anatomical variations and artifacts, particularly for advanced stages of obesity. MATERIALS AND METHODS: Twenty morbidly obese patients (average BMI 44 kg/m(2) ) underwent 1.5-T MRI using a double-echo gradient-echo sequence. Fully automatic analysis (FAA) required no user interaction, while supervised automatic analysis (SAA) involved review and manual correction of the FAA results by two observers. Standard of reference was provided by manual segmentation analysis (MSA). RESULTS: Average processing times per patient were 6, 6+4, and 21 minutes for FAA, SAA, and MSA (P < 0.001), respectively. For VAT/SAT assessment, Pearson correlation coefficients, mean (bias), and standard deviations of the differences were R = 0.950, +0.003, and 0.043 between FAA and MSA and R = 0.981, +0.009, and 0.027 between SAA and MSA. Interobserver variation and intraclass correlation were 3.1% and 0.996 for SAA, and 6.6% and 0.986 for MSA, respectively. CONCLUSION: The presented supervised automatic approach provides a reliable option for MRI-based fat quantification in morbidly obese patients and was much faster than manual analysis.


Asunto(s)
Grasa Abdominal/patología , Adiposidad , Interpretación de Imagen Asistida por Computador/métodos , Imagen por Resonancia Magnética/métodos , Obesidad Mórbida/patología , Reconocimiento de Normas Patrones Automatizadas/métodos , Programas Informáticos , Adolescente , Adulto , Algoritmos , Femenino , Humanos , Aumento de la Imagen/métodos , Imagenología Tridimensional/métodos , Masculino , Persona de Mediana Edad , Variaciones Dependientes del Observador , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Adulto Joven
2.
Obes Surg ; 32(9): 2903-2913, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35851679

RESUMEN

PURPOSE: Preoperative very low-calorie diets (VLCDs) have been shown to reduce liver volume and improve bariatric surgery safety. Here, we compare two VLCD that differ in macronutrient composition. MATERIAL/METHODS: Ninety patients awaiting obesity surgery were included in a prospective, open-label, randomized mono-centre trial comparing the effects of 2-week preoperative VLCDs: BCM Diät™ (diet 1) versus Optifast™ (diet 2). RESULTS: Data from 33 patients in diet 1 and 36 in diet 2 could be analysed. There was no significant difference between the two diet intervention arms on outcome parameters. Overall, both VLCD strategies led to a mean weight reduction of 5.24 [4.72-5.76] kg (p < 0.001), mean excess weight loss was 8.2 [7.4-9.1] % (p < 0.001). BMI reduction was 1.81 [1.63-1.99] kg/m2 (p < 0.001). Over all patients, the liver volume was reduced by 397 [329-466] ml (p < 0.001), which corresponds to 14.6 [12.4; 16.8] %. Liver fat content was significantly reduced by 18.35 [8.98-27.71] %. Reduction of body weight correlates with liver volume loss. In addition, hip/waist circumferences, body fat and fat-free mass decreased significantly. We found an increase of ALAT/ASAT and a significant decrease of triglycerides, LDL-cholesterol and HbA1c. Parameters of inflammatory were significantly reduced upon VLCD. CONCLUSION: Independently of the macronutrient composition, VLCD leads to a significant decrease of body weight, reduction of liver volume and improved parameters of inflammation, glucose and lipid metabolism. Preoperative diets are widely used in conditioning; however, VLCD should be considered as option for patients with obesity undergoing other abdominal surgeries.


Asunto(s)
Cirugía Bariátrica , Obesidad Mórbida , Dieta Reductora , Humanos , Obesidad/metabolismo , Obesidad Mórbida/cirugía , Estudios Prospectivos , Pérdida de Peso
3.
Int J Colorectal Dis ; 25(7): 855-63, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20174809

RESUMEN

OBJECTIVE: 'Fast-track' rehabilitation is able to accelerate recovery, reduce general morbidity, and decrease hospital stay. This is widely accepted for colonic resections. Despite recent evidence that fast track concepts are safe and feasible in rectal resection, there is no information on the acceptance and utilization of these concepts among Austrian and German surgeons. METHOD: A questionnaire concerning perioperative routines in elective, open rectal resection was sent to the chief surgeons of 1,270 German and 120 Austrian surgical centers. RESULTS: The response rate was 63% in Austria (76 centers) and 30% in Germany (385 centers). Mechanical bowel preparation is only abandoned by 2% of the Germany and 7% of the Austrian surgeons. Nasogastric decompression tubes are rarely used; four of five of the questioned surgeons in both countries use intra-abdominal drains. Half of the surgical centers allow the intake of clear fluids on the day of surgery. Mobilization starts in half of the centers on the day of surgery. Epidural analgesia is used in three-fourths of the institutions. Institutions which have implemented fast track rehabilitation for rectal resections discharge the patients earlier then hospitals that adhere to traditional care. CONCLUSION: In many perioperative procedures, Austrian and German Surgeons rely on their traditional approaches. Recent evidence-based adaptations of perioperative routines in rectal resections are only slowly introduced into daily routine; therefore, further efforts have to be done to optimizing patients' care.


Asunto(s)
Procedimientos Quirúrgicos del Sistema Digestivo/tendencias , Encuestas de Atención de la Salud , Recto/cirugía , Austria , Alemania , Humanos , Cuidados Intraoperatorios , Alta del Paciente , Atención Perioperativa , Encuestas y Cuestionarios
4.
Int J Cancer ; 124(11): 2701-8, 2009 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-19165866

RESUMEN

We investigated the therapeutic efficiency of sulfonate-modified polyvinyl alcohol beads loaded with doxorubicin, irinotecan or mitoxantrone in vitro and in vivo in a model of experimental peritoneal carcinomatosis (PC). In vitro, cell proliferation was efficiently impaired by doxorubicin drug eluting bead (DEB) treatment while mitoxantrone DEBs were less effective than. Irinotecan showed little effect for both DEBs and free drug. Apoptosis was not different between free mitoxantrone and the DEB form while more apoptosis induction was observed in cells incubated with free doxorubicin and irinotecan. Experimental PC was produced in mice. The therapeutic efficiency of either mitoxantrone and doxorubicin DEB or free drugs were compared. Mice were treated either once on day 12 or by 3 repetitive applications on days 7, 10 and 12. Mice treated by DEBs showed less weight loss and mortality. Therapeutic effect was determined by measuring tumor volume and tumor load on the day 15 after tumor inoculation. For the single application on the day 12, an advantage could be observed for the free drugs. After 3 repeated injections of both free and mitoxantrone DEB no difference in tumor load or tumor volume could be observed. Least tumor load and tumor volume was observed in mice that received 3 repeated injections of doxorubicin DEB. No animal survived 3 injections of free doxorubicin. We conclude that bead encapsulation of chemotherapeutic drugs may show the advantage of less toxicity in peritoneal spread of colorectal cancer.


Asunto(s)
Antineoplásicos/administración & dosificación , Quimioembolización Terapéutica/métodos , Neoplasias Colorrectales/patología , Doxorrubicina/administración & dosificación , Mitoxantrona/administración & dosificación , Neoplasias Peritoneales/tratamiento farmacológico , Neoplasias Peritoneales/secundario , Animales , Apoptosis/efectos de los fármacos , Camptotecina/administración & dosificación , Camptotecina/análogos & derivados , Línea Celular Tumoral , Femenino , Irinotecán , Ratones , Ratones Endogámicos BALB C
5.
Obes Surg ; 19(2): 230-236, 2009 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-18758872

RESUMEN

BACKGROUND: The only effective treatment for patients with morbid obesity is surgery. Laparoscopic bariatric surgery has become quite popular in attempts to decrease the morbidity associated with laparotomy. The aim of this study was to assess the safety and efficiency by using SurgASSIST(R) for performing the gastrojejunostomy in laparoscopic Roux-en-Y gastric bypass (RYGBP). The variables were compared with the results using the standard laparoscopic circular end-to-end anastomotic stapler (CEEA(R)). METHODS: After randomization, the gastro-jejuostomy of RYGBP was performed in ten patients by transabdominal introduced circular stapler (group A) and in ten patients by transorally introduced circular stapler (SurgASSIST(R); group B) via five-port laparoscopy. A prospective 12-month postoperative follow-up including documentation of minor and major complication as well as weight loss and body composition is done every 8 weeks. RESULTS: The average body mass index (BMI, 52 kg/m(2)) and the other baseline characteristics were equally distributed in both groups. There was no difference in reduction of BMI, excess weight loss, and fat mass in both groups. The rate of port site wound infection in group A was significantly higher (p = 0.03) when compared to group B. There was no anastomotic leak or stricture postoperatively in both groups. CONCLUSIONS: Performing of a gastrojejunostomy in RYGBP by SurgASSIST is a safe and feasible method in comparison to conventional circular stapler systems. The advantage of SurgASSIST is the avoidance to introduce the stapler through the abdominal wall and, by this, a possible port site wound infection. Further prospective studies have to be performed to verify the advantages of the SurgASSIST in comparison to conventional circular stapler systems.


Asunto(s)
Derivación Gástrica/instrumentación , Derivación Gástrica/métodos , Laparoscopía/métodos , Engrapadoras Quirúrgicas , Grapado Quirúrgico/instrumentación , Adulto , Índice de Masa Corporal , Peso Corporal , Diseño de Equipo , Femenino , Estudios de Seguimiento , Derivación Gástrica/efectos adversos , Humanos , Laparoscopía/efectos adversos , Masculino , Obesidad Mórbida/cirugía , Complicaciones Posoperatorias , Grapado Quirúrgico/efectos adversos , Grapado Quirúrgico/métodos , Resultado del Tratamiento
6.
Anasthesiol Intensivmed Notfallmed Schmerzther ; 44(9): 612-8; quiz 620-1, 623-4, 2009 Sep.
Artículo en Alemán | MEDLINE | ID: mdl-19750440

RESUMEN

Obesity is a growing healthcare problem in all industrial countries, which occurs with increasing frequency in young people and indicates bariatric surgery. Obesity increases the risk for pulmonary and cardiovasculary side effects and also the anaesthesiologist is confronted with significantly more problems when the patient is overweight and obese. The present review focuses on the surgical techniques and the anaesthetic implications of bariatric surgery.


Asunto(s)
Anestesia , Cirugía Bariátrica/métodos , Obesidad Mórbida/cirugía , Obesidad/cirugía , Anastomosis en-Y de Roux/métodos , Humanos , Intubación Intratraqueal , Monitoreo Intraoperatorio , Obesidad/complicaciones , Obesidad Mórbida/complicaciones , Premedicación
7.
JPEN J Parenter Enteral Nutr ; 30(3): 222-30, 2006.
Artículo en Inglés | MEDLINE | ID: mdl-16639069

RESUMEN

BACKGROUND: According to current evidence, most organizations, including the American Society for Parenteral and Enteral Nutrition (A.S.P.E.N.), do not recommend the routine use of artificial nutrition for patients with cancer. Despite the recommendation for parenteral nutrition (PN), data for early PN supplementation (PNS) in patients with an advanced malignancy are extremely limited, especially in terms of the affects on nutrition outcomes, body composition, and quality of life (QOL), as well as effects on oncologic outcomes. The aim of the study was to evaluate the effect of PNS on body composition and the quality of life in patients with advanced malignancies. METHODS: One hundred fifty-two consecutive patients with advanced cancer were prospectively randomized to either use of oral enteral nutrition supplement (PN-) or use of oral enteral nutrition supplement plus supplemental PN (PN+). Body weight, body mass index (BMI), and caloric intake were assessed, and hemoglobin (g/dL) and serum albumin (g/L) were measured. Body composition was assessed by body impedance analysis (BIA), and QOL was evaluated by European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30 questionnaire every 6 weeks. RESULTS: No significant differences were evident at baseline between the 2 groups for age, gender, medical diagnosis, weight, BMI, or QOL. A statistically significant difference in mean BMI was observed by week 48 for the PN+ group (PN+ = 21.9, PN-= 20.5, p = .0149), by week 6 in mean body cell mass (PN+ = 55%, PN-= 50,1%, p < .001), mean albumin (PN+ = 40.2 g/L, PN-= 36.2 g/L, p = .015), mean QOL (PN+ = 55.7, PN-= 50.9, p = .035). The cumulative survival rate was significantly greater in the PN+ group (p < .0001). CONCLUSIONS: According to the positive effect of supplemental PN on survival, body composition, and QOL, additional controlled studies must be conducted to confirm these findings.


Asunto(s)
Composición Corporal/efectos de los fármacos , Nutrición Enteral , Neoplasias/complicaciones , Neoplasias/psicología , Nutrición Parenteral , Calidad de Vida , Composición Corporal/fisiología , Índice de Masa Corporal , Femenino , Hemoglobinas/análisis , Humanos , Masculino , Persona de Mediana Edad , Cuidados Paliativos/métodos , Estudios Prospectivos , Albúmina Sérica/análisis , Encuestas y Cuestionarios
8.
Clin Nutr ; 21(4): 329-35, 2002 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-12135594

RESUMEN

BACKGROUND & AIMS: Interdisciplinary nutrition-support teams (NSTs) can improve the efficacy of clinical nutrition. The purpose of this survey was to investigate the prevalence, and structure of German NSTs. METHOD: Hospitals in Germany with more that 250 beds were screened for the existence of NSTs. Eligible NSTs were interviewed about structural characteristics, administration of clinical nutrition and quality control in a face-to-face manner using a standardised questionnaire. RESULTS: A total of 47 NSTs existed in Germany revealing a prevalence of 5.6%. Their main activities were creating nutritional regimens (100%), education (98%) and monitoring nutrition therapy (96%). Twenty-two of NST-physicians (50%) had a specific education as compared to 20.9% NST-nurses and 24% NST-dietitians. Only 12.7% of physicians and 17% of dieticians in comparison to 55.3% of nurses received funding support. Improvement of clinical nutrition by means of increased use of enteral nutrition and special diets was indicated by 72%, 23%, respectively. Some NSTs indicated a reduction of complications (38.3%) and cost-saving (34%) since their establishment. CONCLUSIONS: There is a low prevalence of interdisciplinary NSTs in Germany. Standards of practice, development of guidelines in clinical nutrition and better documentation in NSTs are necessary. Special efforts should be aimed at education of NST members and financing of teams.


Asunto(s)
Apoyo Nutricional/métodos , Grupo de Atención al Paciente/organización & administración , Calidad de la Atención de Salud , Recolección de Datos , Dietética , Alemania , Encuestas de Atención de la Salud , Humanos , Personal de Enfermería en Hospital , Ciencias de la Nutrición/educación , Grupo de Atención al Paciente/economía , Médicos , Encuestas y Cuestionarios , Resultado del Tratamiento
9.
JPEN J Parenter Enteral Nutr ; 27(3): 216-9, 2003.
Artículo en Inglés | MEDLINE | ID: mdl-12757116

RESUMEN

BACKGROUND: Vomiting, aspiration, flatulence, and diarrhea are well-known negative side effects of enteral nutrition through percutaneous endoscopic gastrostomy (PEG). However, it is not yet clarified if pump-assisted (PA) or gravity-controlled (GC) application is the more comfortable and safe choice for long-term nutrition through PEG. METHODS: This was a prospective, randomized, crossover study. Fifty long-term PEG patients were fed by PA nutrition (G1) and 50 patients were fed by GC nutrition (G2). Six weeks of observation (O1) was followed by a switch of method of nutritional application in both groups and an additional 6 weeks of observation (O2). Daily determination of comfort and safety was done with a standardized questionnaire. Evaluation of blood glucose levels on days 1, 21, and 42 during O1 and O2. RESULTS: The patients in both groups had the same medical conditions and were of the same age and sex. Far less flatulence (p < .0006) and epigastric fullness (p < .0003) was discovered in G1 during O1. Also, significantly less regurgitation (p < .0002) and vomiting of feeding diet (p < .0001) in G1 versus G2 could be observed. The rate of diarrhea (p < .0003) in G2 was higher than in G1. The daily profile of blood glucose was significantly better (p < .0008) in G1 than in G2. After the nutritional application was changed in O2, the PA group (G2) again showed a significantly better rate of flatulence, epigastric fullness, regurgitation, vomiting, diarrhea, and daily profile of blood glucose. Ninety-six percent of the patients in G2 preferred further nutrition by PA after finishing this study. All patients in G1 continued their accustomed nutrition by PA. CONCLUSION: Nutrition through PA showed not only a higher comfort rate but also increased safety, which was expressed through a low rate of regurgitation and vomiting. PA presented better glucose metabolization manifested in improved blood glucose levels. As a result of this prospective study, PA is preferable to GC and preferred by patients with long-term PEG nutrition.


Asunto(s)
Nutrición Enteral , Adulto , Análisis de Varianza , Diarrea/etiología , Nutrición Enteral/efectos adversos , Nutrición Enteral/métodos , Femenino , Flatulencia/etiología , Gastrostomía , Gravitación , Humanos , Intubación Gastrointestinal , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Vómitos/etiología
10.
JPEN J Parenter Enteral Nutr ; 28(3): 180-3, 2004.
Artículo en Inglés | MEDLINE | ID: mdl-15141412

RESUMEN

BACKGROUND: Vomiting, aspiration, and pneumonia are serious side effects in enteral feeding via percutaneous endoscopic gastrostomy (PEG), which often leads to hospitalization. To this day, it has not been proven whether pump-assisted (PA) or gravity-controlled application is the safer method for long-term feeding via PEG in bedridden patients. METHODS: This study was conducted as a prospective, randomized crossover study. Fifty bedridden PEG patients were fed using the pump-assisted method (G1) and 50 patients were fed using the gravity-controlled feeding method (G2). After 6 weeks of observation (O1), the feeding methods in both groups were switched, followed by another 6 weeks of observation (O2). Daily recording was done using a standardized questionnaire. The glucose levels during O1 and O2 were determined on days 1, 21, and 42. RESULTS: The patients in both groups were compatible in age, sex, and medical illness. By comparing G1 and G2, a significantly lower regurgitation rate (p < .0002), vomiting of feeding substrate (p < .009), aspiration (p < .01), and pneumonia (p < .02) was observed. The diarrhea rate in G2 was higher than in G1 (p < .007). The glucose profiles in G1 showed a significantly better development (p < .0007) than the ones in G2. After switching the application method in G2, the PA group (now G2) showed a significantly improved rate of regurgitation, vomiting, aspiration, and diarrhea and improved glucose profiles. CONCLUSION: Feeding via PA shows improved safety, which is documented in a lower rate of diarrhea, regurgitation, vomiting, and aspiration. PA also noted a more effective glucose metabolization, which results in better glucose levels. As a result of this prospective study, pump-assisted feeding is recommended for bedridden patients requiring long-term feeding via PEG.


Asunto(s)
Nutrición Enteral/instrumentación , Gastrostomía , Bombas de Infusión , Neumonía por Aspiración/prevención & control , Vómitos/prevención & control , Anciano , Área Bajo la Curva , Reposo en Cama , Glucemia/metabolismo , Estudios Cruzados , Diarrea/epidemiología , Diarrea/prevención & control , Nutrición Enteral/efectos adversos , Nutrición Enteral/métodos , Femenino , Glucosa/metabolismo , Gravitación , Humanos , Intubación Gastrointestinal/efectos adversos , Masculino , Neumonía por Aspiración/epidemiología , Estudios Prospectivos , Seguridad , Encuestas y Cuestionarios , Resultado del Tratamiento , Vómitos/epidemiología
11.
Obes Surg ; 23(3): 338-45, 2013 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-22983771

RESUMEN

BACKGROUND: Prevalence rates of obesity are still rising. Weight loss surgery (WLS) is the most invasive but also most effective treatment option when behavioral modification has failed. Research indicates that health care professionals hold ambivalent views on bariatric surgery, while views of the general public have not yet been investigated. METHODS: In a German representative sample of n = 3,003 respondents in a computer-assisted telephone interview, n = 1,008 persons were interviewed on their views of the effectiveness of bariatric surgery and other interventions for obesity. Also, willingness to recommend a treatment was assessed. RESULTS: Lifestyle-based interventions were viewed as most effective in terms of weight loss. About 50 % of the population stated that WLS is "very effective" while still a quarter of respondents did not ascribe effectiveness to WLS. Higher age was associated with lower expectations of effectiveness while higher stigmatizing attitudes and genetic attributes for obesity were associated with higher expectations of effectiveness. Seventy-two percent would not recommend WLS or undergo it, if applicable, themselves. Higher educated respondents and those that viewed WLS as effective were more likely to recommend WLS. CONCLUSIONS: The German general public seems to be rather cautious regarding bariatric surgery. It may be assumed that false beliefs on the effectiveness and risk patterns of bariatric surgery are still very common, despite rising surgery numbers. Our results further emphasize the need for providing evidence-based information on bariatric surgery to the general public.


Asunto(s)
Cirugía Bariátrica/psicología , Obesidad Mórbida/psicología , Opinión Pública , Análisis Costo-Beneficio , Medicina Basada en la Evidencia , Femenino , Alemania/epidemiología , Conocimientos, Actitudes y Práctica en Salud , Humanos , Entrevistas como Asunto , Masculino , Persona de Mediana Edad , Obesidad Mórbida/epidemiología , Prevalencia , Estereotipo , Encuestas y Cuestionarios
12.
Obesity (Silver Spring) ; 21(3): 529-34, 2013 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-23592659

RESUMEN

OBJECTIVE: A spontaneous deletion in the nicotinamide nucleotide transhydrogenase (Nnt) gene eliminating exons 7-11 in C57BL/6J (B6J) mice is associated with reduced glucose-stimulated insulin secretion in vitro, impaired glucose tolerance, higher epigonadal fat mass, and altered susceptibility to diet induced obesity of male B6J mice was proposed. A potential implication for NNT in human adipose tissue distribution has not been investigated so far. DESIGN AND METHODS: Therefore, NNT mRNA expression in paired human samples of visceral (vis) and subcutaneous (sc) adipose tissue from 221 subjects with a wide range of body mass index (BMI), insulin sensitivity, and glucose tolerance was analyzed. RESULTS: NNT mRNA expression is significantly higher in visceral fat of obese patients and correlates with body weight, BMI, % body fat, visceral and sc fat area, waist and hip circumference, and fasting plasma insulin (FPI). Multivariate linear regression analysis revealed visceral NNT expression as age and gender independent predictor of BMI, waist circumference, visceral fat area, and % body fat, but not FPI and 2 h OGTT glucose. CONCLUSION: In conclusion, a functional relevance of NNT in the development of human obesity and visceral fat distribution was suggested here.


Asunto(s)
Grasa Intraabdominal/metabolismo , NADP Transhidrogenasa AB-Específica/metabolismo , Obesidad/genética , ARN Mensajero/metabolismo , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Glucemia/análisis , Composición Corporal , Índice de Masa Corporal , Peso Corporal , Dieta , Ayuno , Femenino , Regulación de la Expresión Génica , Prueba de Tolerancia a la Glucosa , Humanos , Insulina/sangre , Resistencia a la Insulina , Modelos Lineales , Masculino , Persona de Mediana Edad , Proteínas Mitocondriales/genética , Proteínas Mitocondriales/metabolismo , Análisis Multivariante , NADP Transhidrogenasa AB-Específica/genética , Obesidad/fisiopatología , ARN Mensajero/genética , Grasa Subcutánea/metabolismo , Adulto Joven
13.
Obes Facts ; 6(1): 57-69, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23429279

RESUMEN

OBJECTIVE: Apelin is an adipokine which plays a role in the regulation of glucose homeostasis and may contribute to the link between increased adipose tissue mass and obesity related metabolic diseases. Here we investigate the role of omental and subcutaneous (SC) adipose tissue apelin and its receptor APJ mRNA expression in human obesity and test the hypothesis that changes in circulating apelin are associated with reduced fat mass in three weight loss intervention studies. METHODS: Apelin serum concentration was measured in 740 individuals in a cross-sectional (n = 629) study including a subgroup (n = 161) for which omental and SC apelin mRNA expression has been analyzed and in three interventions: 12 weeks exercise (n = 60), 6 months calorie-restricted diet (n = 19), 12 months after bariatric surgery (n = 32). RESULTS: Apelin mRNA is significantly higher expressed in adipose tissue of patients with type 2 diabetes and correlates with circulating apelin, BMI, body fat, C-reactive protein, and insulin sensitivity. Obesity surgery-induced weight loss causes a significant reduction in omental and SC apelin expression. All interventions led to significantly reduced apelin serum concentrations which significantly correlate with improved insulin sensitivity, independently of changes in BMI. CONCLUSIONS: Reduced apelin expression and serum concentration may contribute to improved insulin sensitivity beyond significant weight loss.


Asunto(s)
Cirugía Bariátrica , Restricción Calórica , Terapia por Ejercicio , Péptidos y Proteínas de Señalización Intercelular/sangre , Grasa Intraabdominal/metabolismo , Obesidad/terapia , Grasa Subcutánea/metabolismo , Pérdida de Peso , Adiposidad , Adulto , Apelina , Receptores de Apelina , Glucemia/metabolismo , Índice de Masa Corporal , Distribución de Chi-Cuadrado , Estudios Transversales , Diabetes Mellitus Tipo 2/sangre , Regulación hacia Abajo , Femenino , Humanos , Resistencia a la Insulina , Péptidos y Proteínas de Señalización Intercelular/genética , Análisis de los Mínimos Cuadrados , Modelos Lineales , Masculino , Análisis Multivariante , Obesidad/sangre , Obesidad/genética , Obesidad/fisiopatología , Estudios Prospectivos , ARN Mensajero/metabolismo , Receptores Acoplados a Proteínas G/sangre , Factores de Tiempo , Resultado del Tratamiento
14.
Metabolism ; 61(5): 706-14, 2012 May.
Artículo en Inglés | MEDLINE | ID: mdl-22136911

RESUMEN

Chemerin is a chemoattractant adipokine that regulates adipogenesis and may induce insulin resistance. Chemerin serum concentrations are elevated in obese, insulin-resistant, and inflammatory states in vivo. Here we investigate the role of omental (OM) and subcutaneous (SC) adipose tissue chemerin and CMKLR1 messenger RNA (mRNA) expression in human obesity. In addition, we test the hypothesis that changes in chemerin serum concentrations are primarily associated with reduced body fat mass in the context of 3 weight loss intervention studies. Chemerin serum concentration was measured in 740 individuals in a cross-sectional (n = 629) study including a subgroup (n = 161) for which OM and SC chemerin mRNA expression has been analyzed as well as in 3 interventions including 12 weeks of exercise (n = 60), 6 months of calorie-restricted diet (n = 19) studies, and 12 months after bariatric surgery (n = 32). Chemerin mRNA is significantly higher expressed in adipose tissue of patients with type 2 diabetes mellitus and correlates with circulating chemerin, body mass index (BMI), percentage body fat, C-reactive protein, homeostasis model assessment of insulin resistance, and glucose infusion rate in euglycemic-hyperinsulinemic clamps. CMKLR1 mRNA expression was not significantly different between the 2 fat depots. Obesity surgery-induced weight loss causes a significant reduction on both OM and SC chemerin expression. All interventions led to significantly reduced chemerin serum concentrations. Decreased chemerin serum concentrations significantly correlate with improved glucose infusion rate and reduced C-reactive protein levels independently of changes in BMI. Insulin resistance and inflammation are BMI-independent predictors of elevated chemerin serum concentrations. Reduced chemerin expression and serum concentration may contribute to improved insulin sensitivity and subclinical inflammation beyond significant weight loss.


Asunto(s)
Tejido Adiposo/metabolismo , Quimiocinas/biosíntesis , Ejercicio Físico/fisiología , Obesidad/sangre , Pérdida de Peso/fisiología , Adulto , Anciano , Anciano de 80 o más Años , Cirugía Bariátrica , Composición Corporal/fisiología , Quimiocinas/sangre , Estudios de Cohortes , Diabetes Mellitus Tipo 2/sangre , Dieta Reductora , Femenino , Humanos , Insulina/sangre , Resistencia a la Insulina , Péptidos y Proteínas de Señalización Intercelular , Masculino , Persona de Mediana Edad , Obesidad/dietoterapia , Obesidad/cirugía , Epiplón/metabolismo , ARN Mensajero/biosíntesis , Receptores de Quimiocina/biosíntesis , Receptores de Quimiocina/genética , Análisis de Regresión , Circunferencia de la Cintura , Adulto Joven
16.
Surg Obes Relat Dis ; 6(3): 260-6, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20510289

RESUMEN

BACKGROUND: One of the most effective treatments of patients with morbid obesity is laparoscopic Roux-en-Y gastric bypass (RYGB). Sudden weight loss after RYGB for morbid obesity can result in a concurrent decrease in the lean body mass. However, the long-term results (weight reduction and reduced co-morbidities) depend on the postoperative long-term therapy. Aerobic physical exercise (APE) has been considered conservative treatment of obesity and type 2 diabetes mellitus. The aim of the present study was to assess the efficacy of APE on weight loss, body composition, and co-morbidities in patients after laparoscopic RYGB. The study was performed at a university hospital in Germany. METHODS: A total of 60 consecutive morbidly obese patients underwent laparoscopic RYGB. The patients were prospectively randomized into a low-exercise group (APE 1 time for 1 hr/wk) or a multiple-exercise group (APE 2 times for 1 hr/wk). The following prospective data were collected: age, gender, length of hospital stay, operative details, co-morbidities, postoperative complications, initial body weight and height, postoperative weight, and body composition. The patients' body composition was assessed every 8 weeks during the 24-month follow-up period. RESULTS: The average body mass index (52 kg/m(2)) and other baseline characteristics were distributed equally in the 2 groups. No major complications and no significant differences in the minor complications were found postoperatively between the 2 groups. The multiple exercise group had a significantly more rapid reduction of body mass index, excess weight loss, and fat mass compared with the low-exercise group. The initial loss of body cell mass and lean body mass was significantly lower in the multiple exercise group and was regained more rapidly in the low-exercise group. In addition, the multiple exercise group showed significantly earlier resolution or improvement of co-morbidities. CONCLUSION: APE positively influenced weight loss, body composition, and co-morbidity resolution after RYGB for obesity. Additional controlled studies and longer follow-up are needed to confirm these positive findings.


Asunto(s)
Ejercicio Físico/fisiología , Derivación Gástrica/métodos , Laparoscopía/métodos , Obesidad Mórbida/cirugía , Adulto , Análisis de Varianza , Composición Corporal , Índice de Masa Corporal , Distribución de Chi-Cuadrado , Comorbilidad , Impedancia Eléctrica , Femenino , Humanos , Tiempo de Internación/estadística & datos numéricos , Masculino , Obesidad Mórbida/fisiopatología , Cooperación del Paciente , Resistencia Física/fisiología , Complicaciones Posoperatorias , Estudios Prospectivos , Resultado del Tratamiento , Pérdida de Peso
17.
JPEN J Parenter Enteral Nutr ; 30(3): 222-230, 2006.
Artículo en Inglés | MEDLINE | ID: mdl-28052743

RESUMEN

The authors of the above article have requested its withdrawal, notifying the Journal that the clinical trials described in the article were not conducted as written in the article. The Editor-in-Chief, the American Society for Parenteral and Enteral Nutrition, and the Publisher have determined to retract the article.

18.
Langenbecks Arch Surg ; 391(3): 195-202, 2006 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-16491403

RESUMEN

BACKGROUND AND AIMS: There have been many supportive data that the pylorus-preserving pancreatoduodenectomy (PPPD) might be equal to the classic Whipple pancreatoduodenectomy (PD) in terms of oncological radicality. However, few reports are available on the early postoperative and enduring functional changes, nutritional status, body composition, and quality of life years after surgery. The aim of this study was to compare nutritional and functional results of the different techniques in a retrospective evaluation and prospective cohort study. PATIENTS AND METHODS: In May 1998, the standard surgical approach in the Department of Surgery, University-Hospital Mannheim, changed from PD to PPPD. The early postoperative and enduring functional changes, quality of life, oncological radicality, and nutritional status after years were compared between 128 patients after PD and 111 patients after PPPD. In a retrospective manner, the intra- and postoperative course was evaluated. In survivors, we prospectively analyzed the functional, nutritional, and oncological outcomes after 54 months (mean) in PD and after 24 months (mean) in PPPD patients. RESULTS: The PPPD and PD groups did not differ according to age, gender, preoperative condition, or tumor localization. The PPPD group demonstrated favorable results (p<0.05) for operation time (PPPD 341+/-74 vs PD 386+/-89 min), blood loss (793+/-565 vs 1,000+/-590 ml), blood transfusions (416+/-691 vs 653+/-776 ml), delayed gastric emptying (6 vs 13%), and hospital stay (20 vs 24 days). However, a possible bias has to be mentioned since more T4 stages were diagnosed in the PD group (3 vs 11%), and even more extended (venous) resections were performed in the PD group (7 vs 24%). Morbidity (32 vs 30%) and mortality (5 vs 3%) did not differ between the two groups. After 24 months (PPPD, n=22) and 54 months (PD, n=16), there was no difference in global quality of life in recurrence-free patients. While the preoperative body weight was reached after 4 months (median) in the PPPD group, it was reached after 6 months (p<0.05) in the PD group. Bioelectrical impedance analysis (BIA) revealed a significantly (p<0.05) lower total body water (55 vs 60%) and significantly higher total body fat (26 vs 18%) in PPPD than in PD patients. Long-term follow-up showed no significant statistical differences in survival between both groups. CONCLUSION: Besides favorable postoperative outcome in specific aspects and equal oncological outcome of PPPD, pylorus preservation seems to have advantages in enduring functional and nutritional status years after surgery for pancreatic cancer.


Asunto(s)
Estado Nutricional , Neoplasias Pancreáticas/cirugía , Pancreaticoduodenectomía/métodos , Píloro/cirugía , Anciano , Pérdida de Sangre Quirúrgica , Transfusión Sanguínea/estadística & datos numéricos , Composición Corporal , Distribución de Chi-Cuadrado , Femenino , Vaciamiento Gástrico , Humanos , Tiempo de Internación/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Neoplasias Pancreáticas/patología , Estudios Prospectivos , Calidad de Vida , Estudios Retrospectivos , Análisis de Supervivencia , Resultado del Tratamiento
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