Helicobacter pylori and corpus gastric pathology are associated with lower serum ghrelin.

AIM: To evaluate the association of Helicobacter pylori (H. pylori), cagA genotype, and type of gastric pathology with ghrelin, leptin and nutritional status. METHODS: Fasted dyspeptic adults (18-70 years) referred for an upper digestive endoscopy were enrolled in this cross-sectional study. Height and weight were assessed for body mass index (BMI) calculation. A sociodemographic survey was administered and nutrient intake was evaluated with 24 h dietary recalls. Serum total ghrelin and leptin levels were analyzed by enzyme-linked immunosorbent assay. 13C-Urea Breath Test was performed and four gastric biopsies were obtained during endoscopy for histopathology and H. pylori DNA amplification and genotyping. Data analysis was performed using χ2, Mann-Whitney U, Kruskal-Wallis tests, Spearman's correlation and linear regression. RESULTS: One hundred and sixty-three patients (40.8 ± 14.0 years), 98/65 females/males, were included. Overall, persistent H. pylori prevalence was 53.4% (95%CI: 45.7%-65.8%). Neither nutrient intake nor BMI differed significantly between H. pylori positive and negative groups. Serum ghrelin was significantly lower in infected patients [median 311.0 pg/mL (IQR 230.0-385.5)] than in uninfected ones [median 355.0 pg/mL (IQR 253.8-547.8)] (P = 0.025), even after adjusting for BMI and gender (P = 0.03). Ghrelin levels tended to be lower in patients carrying cagA positive strains both in the antrum and the corpus; however, differences with those carrying cagA negative strains did not reach statistical significance (P = 0.50 and P = 0.49, respectively). In addition, the type and severity of gastric pathology in the corpus was associated with lower serum ghrelin (P = 0.04), independently of H. pylori status. Conversely, leptin levels did not differ significantly between infected and uninfected patients [median 1.84 ng/mL (0.80-4.85) vs 1.84 ng/mL (0.50-5.09), (P = 0.51)]. CONCLUSION: H. pylori infection and severity of gastric corpus pathology are associated with lower serum ghrelin. Further studies could confirm a lower ghrelin prevalence in cagA-positive patients.

Diferencias clínicas y quirúrgicas entre pacientes con tuberculosis abdominal con y sin infección por el virus de inmunodeficiencia humana / Clinical and surgical differences in patients with abdominal tuberculosis infected and non infected by human immunodeficiency virus patient

La tuberculosis abdominal (TBa) ocurre en el 1 al 2,5 % del total de la tuberculosis diagnosticadas. Objetivos: Analizar las diferencias entre las características clínicas y quirúrgicas de la TBa en pacientes VIH positivos y VIH negativos. Materiales y métodos: Estudio descriptivo-analítico retrospectivo entre dos poblaciones asistidas entre los años 1989-2009 con diagnóstico de TBa. Once pacientes eran VIH positivos y 60 VIH negativos. Se analizaron variables clínicas, humorales, hallazgos quirúrgicos, procedimientos diagnósticos utilizados y los diferentes órganos abdominales afectados. En el análisis estadístico se utilizó la prueba del Chi cuadrado o el test de Fischer. También se calcularon el ODDS Ratio (OR) e intervalo de confianza al 95 %. Resultados: se diagosticaron 71 casos de TBa de los cuales 11 (15,5 %) fueron VIH positivos. de los 71 casos la edad media fue de 38 años, los síntomas más frecuentes observados fueron pérdida de peso 90,1 %, dolor abdominal 81,4 %, hipertermia 91,6 %, entre otros. el 8,5 % de los pacientes fallecieron. Al comparar ambas poblaciones, se observaron diferencias estadísticamente significativas en la población VIH positiva quienes fueron más jóvenes, más frecuentemente de género masculino, con menor tiempo de duración de los síntomas, presentando en menor frecuencia hipertermia y disminución de peso y más frecuentemente masa abdominal palpable y adenopatías en la cavidad abdominal. La mortalidad fue también mayor en este grupo. Conclusiones: La población presentó variables estadísticamente significativas para la edad, el género, tiempo de evolución de los síntomas, entre otras variaables que pueden ser de utilidad en su diagnóstico diferencial.

Abdominal tuberculosis (TBA) occurs in 1 to 2,5 % of total tuberculosis diagnosed. Objective: To analyze the differences between clinical and surgical characteristics of the TBA in HIV patients and HIV non-reactive reagents. Materials and Methods: A retrospective descriptive-analyticstudy of two groups assisted in the years 1989-2009 with a diagnosis of TBA. Eleven patients were HIV positive and 60 HIV-negative. We analyzed the clinical, laboratory findings and surgical findings, the diagnostic procedures used and the abdominal organs affected. Statistical analysis used Chi square test or Fischer test. Also calculated the Odds Ratio (OR) and confidence interval 95 %. Results: We diagnosed 71 cases of TBA of which 11 (15,5%) were HIV positive. Of the 71 cases the average age was 38 years, the most common symptoms observed were weight loss (90,1 %), abdominal pain (81,4 %), hyperthermia (91,6 %). 8,5 % of the patients died. HIV positive and negative were compared finding statistically significant differences in the HIV who were younger, more often male, with shorter duration of symptoms. In this population weight reduction and hyperthermia was less frequently in contrast with frequently palpable abdominal mass and lymphadenopathy in the abdominal cavity. Mortality was higher in among HIV positive patients. Conclusions: the present population statistically significnt variables for age, gender and time in the presence of sympotoms, among other variable that may be useful in the differential diagnosis.

The enteric nervous system in chagasic and idiopathic megacolon.

Chagas disease frequently causes megacolon. We investigated the enteric nervous systems in patients with chagasic megacolon compared to idiopathic megacolon and controls. Surgical specimens were obtained from 12 patients with chagasic megacolon (1 woman, 11 men, age range 41 to 72 y) and 9 patients with idiopathic megacolon (3 women, 6 men, age range 39 to 68 y), undergoing surgery for intractable constipation. A control group of 10 patients (9 women, 1 man, age range 43 to 75 y) undergoing left hemicolectomy for nonobstructing colorectal cancer was also studied. Colonic sections were investigated by conventional and immunohistochemical methods, also taking into consideration the presence of lymphocytes. Compared to controls, the 2 megacolon groups showed a decrease of enteric neurons (not due to increased apoptosis) and of enteric glial cells (all more important in chagasic patients). The interstitial cells of Cajal subtypes were decreased but not absent in megacolons, although an increase of the intramuscular subtype was found, suggesting a possible compensative mechanism. An increased amount of fibrosis was found in the smooth muscle and the myenteric plexus of chagasic patients compared to the idiopathic megacolon and the control group. A mild lymphocytic infiltration of the enteric plexuses (more evident in Chagas disease) was also found in megacolons but not in controls. Patients with chagasic megacolon display important abnormalities of several components of the enteric nervous system. Similar alterations, although of lesser severity, may be found in patients with idiopathic megacolon.