AIM： To investigate the occurrence of chromosome 3, 7, 8, 9, and 17 aneuploidies, TPS3 gene deletion and p53 protein expression in chronic gastritis, atrophic gastritis and gastric ulcer, and their association with H...AIM： To investigate the occurrence of chromosome 3, 7, 8, 9, and 17 aneuploidies, TPS3 gene deletion and p53 protein expression in chronic gastritis, atrophic gastritis and gastric ulcer, and their association with H pylori infection. METHODS： Gastric biopsies from normal mucosa （NM, n = 10）, chronic gastritis （CG, n = 38）, atrophic gastritis （CAG, n=13） and gastric ulcer （GU, n=21） were studied using fluorescence in situ hybridization （FISH） and immunohistochemical assay. A modified Giemsa staining technique and PCR were used to detect Hpylori. An association of the gastric pathologies and aneuploidies with Hpylori infection was assessed. RESULTS： Aneuploidies were increasingly found from CG （21%） to CAG （31%） and to GU （62%）, involving mainly monosomy and trisomy 7, trisomies 7 and 8, and trisomies 7, 8 and 17, respectively. A significant association was found between H pylori infection and aneuploidies in CAG （P=0.0143） and GU （P=0.0498）. No TP53 deletion was found in these gastric lesions, but p53-positive immunoreactivity was detected in 45% （5/11） and 12% （2/17） of CG and GU cases, respectively. However, there was no significant association between p53 expression and H pylori infection. CONCLUSION： The occurrence of aneuploidies in benign lesions evidences chromosomal instability in early stages of gastric carcinogenesis associated with Hpylori infection, which may confer proliferative advantage. The increase of p53 protein expression in CG and GU may be due to overproduction of the wild-type protein related to an inflammatory response in mucosa.展开更多
Background and Objectives: In anesthesia for bariatric surgery, alterations occur in several organs, including the kidney. The objective of this study was to compare the effect of dexmedetomidine and remifentanil on t...Background and Objectives: In anesthesia for bariatric surgery, alterations occur in several organs, including the kidney. The objective of this study was to compare the effect of dexmedetomidine and remifentanil on the renal function of morbidly obese patients submitted to bariatric surgery. Methods: Sixty-one patients were studied prospectively and divided randomly into two groups: remifentanil (R) and dexmedetomidine (D). Renal function was evaluated in three phases: before anesthesia (M0), after anesthetic induction (M1) and after surgical incision (M2). Plasma concentrations were determined for glucose, antidiuretic hormone, creatinine, urea, sodium, potassium and osmolarity and urinary concentrations for creatinine, urea, sodium, potassium and osmolarity. Results: Significant differences were found between groups for potassium at M1 (p Conclusions: In both groups, the clearance values fell from moments M0 to M2. This result indicates that renal function of obese patients submitted to bariatric surgery presented a physiological response compatible with the effect of anesthetic-surgical stress. In the group D, creatinine and sodium clearances were elevated at M1. Urinary volume was greater at M2. These results are suggestive of better preservation of renal function.展开更多
基金Supported by the Brazilian Agency FAPESP,No.00/09413-6
文摘AIM： To investigate the occurrence of chromosome 3, 7, 8, 9, and 17 aneuploidies, TPS3 gene deletion and p53 protein expression in chronic gastritis, atrophic gastritis and gastric ulcer, and their association with H pylori infection. METHODS： Gastric biopsies from normal mucosa （NM, n = 10）, chronic gastritis （CG, n = 38）, atrophic gastritis （CAG, n=13） and gastric ulcer （GU, n=21） were studied using fluorescence in situ hybridization （FISH） and immunohistochemical assay. A modified Giemsa staining technique and PCR were used to detect Hpylori. An association of the gastric pathologies and aneuploidies with Hpylori infection was assessed. RESULTS： Aneuploidies were increasingly found from CG （21%） to CAG （31%） and to GU （62%）, involving mainly monosomy and trisomy 7, trisomies 7 and 8, and trisomies 7, 8 and 17, respectively. A significant association was found between H pylori infection and aneuploidies in CAG （P=0.0143） and GU （P=0.0498）. No TP53 deletion was found in these gastric lesions, but p53-positive immunoreactivity was detected in 45% （5/11） and 12% （2/17） of CG and GU cases, respectively. However, there was no significant association between p53 expression and H pylori infection. CONCLUSION： The occurrence of aneuploidies in benign lesions evidences chromosomal instability in early stages of gastric carcinogenesis associated with Hpylori infection, which may confer proliferative advantage. The increase of p53 protein expression in CG and GU may be due to overproduction of the wild-type protein related to an inflammatory response in mucosa.
文摘Background and Objectives: In anesthesia for bariatric surgery, alterations occur in several organs, including the kidney. The objective of this study was to compare the effect of dexmedetomidine and remifentanil on the renal function of morbidly obese patients submitted to bariatric surgery. Methods: Sixty-one patients were studied prospectively and divided randomly into two groups: remifentanil (R) and dexmedetomidine (D). Renal function was evaluated in three phases: before anesthesia (M0), after anesthetic induction (M1) and after surgical incision (M2). Plasma concentrations were determined for glucose, antidiuretic hormone, creatinine, urea, sodium, potassium and osmolarity and urinary concentrations for creatinine, urea, sodium, potassium and osmolarity. Results: Significant differences were found between groups for potassium at M1 (p Conclusions: In both groups, the clearance values fell from moments M0 to M2. This result indicates that renal function of obese patients submitted to bariatric surgery presented a physiological response compatible with the effect of anesthetic-surgical stress. In the group D, creatinine and sodium clearances were elevated at M1. Urinary volume was greater at M2. These results are suggestive of better preservation of renal function.
