RESUMEN

Background: Tumor multifocality is frequently observed in papillary thyroid carcinoma (PTC). However, the maximum tumor diameter (MTD), currently utilized in various staging schemes, might not accurately indicate the level of aggressiveness exhibited by multifocal tumors. We aimed to investigate the relationship between total tumor diameter (TTD) and clinicopathological features of papillary thyroid carcinoma. Methods: Retrospective data analysis was done on 1936 individuals who underwent complete thyroidectomy for PTC. Patients were classified into subgroups according to unilateral multifocality, central lymph node metastasis (CLNM) and lateral lymph node metastasis (LLNM). The relationships of clinicopathological features among these groups were analyzed. Results: Unilateral multifocality was observed in 117 patients. The clinicopathological features of the unilateral multifocal PTC were similar to the unifocal PTC with approximate TTD. The unilateral multifocality played no independent role in CLNM and LLNM. Moreover, the efficiency of TTD in predicting CLNM and LLNM was significantly higher than that of MTD. Conclusion: In the case of unilateral multifocal PTC, TTD is a more accurate indicator of the biological characteristics of the tumor than MTD.

Asunto(s)

Neoplasias de la Tiroides , Humanos , Cáncer Papilar Tiroideo/cirugía , Metástasis Linfática , Puntaje de Propensión , Estudios Retrospectivos , Neoplasias de la Tiroides/cirugía

RESUMEN

ß-Carotene is a precursor of vitamin A and a dietary supplement for its antioxidant property. Producing ß-carotene by microbial fermentation has attracted much attention owing to consumers' preference for the natural product. In this study, an engineered photosynthetic Rhodobacter sphaeroides producing ß-carotene was constructed by the following strategies: (1) five promoters of different strengths were used to investigate the effect of the expression level of crtY on ß-carotene content. It was found that PrrnB increased the ß-carotene content by 109%. (2) blocking of the branched pentose phosphate pathway by zwf deletion, and (3) overexpressing dxs could restore the transcriptional levels of crtE and crtB. Finally, the engineered RS-C3 has the highest ß-carotene content of 14.93 mg/g dry cell weight (DCW) among all of the reported photosynthetic bacteria and the ß-carotene content reached 3.34 mg/g DCW under light conditions. Our results will be available for industrial use to supply a large quantity of natural ß-carotene.

Asunto(s)

Proteínas Bacterianas/genética , Liasas Intramoleculares/genética , Rhodobacter sphaeroides/genética , Rhodobacter sphaeroides/metabolismo , beta Caroteno/biosíntesis , Proteínas Bacterianas/metabolismo , Fermentación , Liasas Intramoleculares/metabolismo , Luz , Ingeniería Metabólica , Regiones Promotoras Genéticas , Rhodobacter sphaeroides/efectos de la radiación

RESUMEN

To evaluate the function of carbon nanoparticles during the thyroid reoperation for carcinoma, we conducted this study by retrospectively analyzing the data of patients who underwent at least completion thyroidectomy with bilateral central lymph nodes dissection for thyroid carcinoma from January 2009 to June 2016. The clinicopathologic characteristics and surgical details were compared between the patient who accepted intraoperative carbon nanoparticles injection and those who accepted nothing injection during the surgery. The main monitoring indicators were the number of dissected lymph nodes and metastatic lymph nodes in central zone, the number of identified parathyroid glands and autoplastic parathyroid glands and unintentionally resected parathyroid glands. A total of 69 patients were enrolled into the carbon nanoparticles group and 128 patients were enrolled into the control group.The average number of lymph nodes harvested in the central zone was higher in the carbon nanoparticles group than that in the control group (11.2 ±â€Š5.7 vs 7.7 ±â€Š4.0, P < .001), so was the average number of metastatic lymph nodes (4.5 ±â€Š4.5 vs 2.7 ±â€Š2.9, P = .004). The average number of identified parathyroid gland was greater in the carbon nanoparticles group than that in the control group (2.4 ±â€Š1.2 vs 1.6 ±â€Š1.1, P < .001). The average number of autoplastic parathyroid gland was comparable between the 2 groups (0.6 ±â€Š0.6 vs 0.4 ±â€Š0.7, P = .052). But the average number of unintentionally resected parathyroid gland was less in the carbon nanoparticles group than that in the control group (0.1 ±â€Š0.2 vs 0.2 ±â€Š0.4, P = .007). Carbon nanoparticles can improve lymph nodes dissection and identification of parathyroid gland during thyroid reoperation for carcinoma.

Asunto(s)

Escisión del Ganglio Linfático/estadística & datos numéricos , Nanopartículas/administración & dosificación , Neoplasias de la Tiroides/patología , Neoplasias de la Tiroides/cirugía , Tiroidectomía/métodos , Adulto , Carbono , Femenino , Humanos , Metástasis Linfática , Masculino , Persona de Mediana Edad , Nanopartículas/química , Glándulas Paratiroides/patología , Paratiroidectomía/métodos , Paratiroidectomía/estadística & datos numéricos , Reoperación , Estudios Retrospectivos , Glándula Tiroides/patología

RESUMEN

The aim of the study was to investigate whether carbon nanoparticles (CNs) can improve the dissection of lymph nodes and protect parathyroid glands (PGs) during reoperation for patients with papillary thyroid carcinoma (PTC).PTC patients who previously underwent thyroidectomy and later received reoperation between January 2009 and January 2016 were retrospectively recruited. We compared the patients who had CN suspension injected into the residual thyroid gland with a control group of patients who did not have the injection. The primary endpoints were the number of lymph nodes dissected, the number of PGs identified and reimplanted, and the rate of postoperative hypoparathyroidism.CN suspension injection was conducted in 55 of 174 patients. The total number of lymph nodes and metastatic lymph nodes dissected between the 2 groups were not different (22.8 ±â€Š13.7 vs 21.0 ±â€Š13.3, P = .481 and 5.5 ±â€Š3.8 vs 4.8 ±â€Š4.0, P = .695). The number of central lymph nodes and metastatic central lymph nodes in the CN group was significantly higher than those dissected in the control group (8.7 ±â€Š6.9 vs 6.2 ±â€Š5.2, P = .037 and 2.7 ±â€Š1.9 vs 2.1 ±â€Š1.6, P = .012). More PGs were identified (2.42 ±â€Š1.15 vs 1.58 ±â€Š1.12, P = .001) and fewer were reimplanted (48 vs 90, P = .040) in the CN group. Patients who had CN suspension injection had a lower rate of transient hypoparathyroidism (14/55 vs 50/119, P = .043) but no significant difference in the rate of permanent hypoparathyroidism (1/55 vs 9/119, P = .173).CN suspension injection improves dissection of central lymph nodes and identification of PG in PTC patients undergoing reoperation and lowers the rate of postoperative transient hypoparathyroidism.

Asunto(s)

Carbono , Carcinoma Papilar/patología , Carcinoma Papilar/cirugía , Escisión del Ganglio Linfático , Nanopartículas , Glándulas Paratiroides/patología , Neoplasias de la Tiroides/patología , Neoplasias de la Tiroides/cirugía , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reoperación , Estudios Retrospectivos , Cáncer Papilar Tiroideo , Tiroidectomía

RESUMEN

BACKGROUND: Transjugular intrahepatic portosystemic shunt (TIPS) and open splenectomy and esophagogastric devascularization (OSED) are widely used to treat patients with portal hypertension and recurrent variceal bleeding (PHRVB). This study aimed to compare the effectiveness between TIPS and OSED for the treatment of PHRVB. METHODS: The data were retrospectively retrieved from 479 cirrhotic patients (Child-Pugh A or B class) with PHRVB, who had undergone TIPS (TIPS group) or OSED (OSED group) between January 1, 2010 and October 31, 2014. RESULTS: A total of 196 patients received TIPS, whereas 283 underwent OSED. Within one month after TIPS and OSED, the rebleeding rates were 6.1% and 3.2%, respectively (P=0.122). Significantly lower incidence of pleural effusion, splenic vein thrombosis, and pulmonary infection, as well as higher hepatic encephalopathy rate, shorter postoperative length of hospital stay, and higher hospital costs were observed in the TIPS group than those in the OSED group. During the follow-up periods (29 months), significantly higher incidences of rebleeding (15.3% vs 4.6%, P=0.001) and hepatic encephalopathy (17.3% vs 3.9%, P=0.001) were observed in the TIPS group than in the OSED group. The incidence of in-stent stenosis was 18.9%. The survival rates were 91.3% in the TIPS group and 95.1% in the OSED group. The long-term liver function did not worsen after either TIPS or OSED. CONCLUSION: For the patients with liver function in the Child-Pugh A or B class, TIPS is not superior over OSED in terms of PHRVB treatment and rebleeding prevention.

Asunto(s)

Várices Esofágicas y Gástricas/cirugía , Esófago/irrigación sanguínea , Hemorragia Gastrointestinal/cirugía , Hipertensión Portal/cirugía , Cirrosis Hepática/complicaciones , Derivación Portosistémica Intrahepática Transyugular , Esplenectomía , Procedimientos Quirúrgicos Vasculares/métodos , Adulto , Análisis Costo-Beneficio , Várices Esofágicas y Gástricas/diagnóstico , Várices Esofágicas y Gástricas/economía , Várices Esofágicas y Gástricas/etiología , Femenino , Hemorragia Gastrointestinal/diagnóstico , Hemorragia Gastrointestinal/economía , Hemorragia Gastrointestinal/etiología , Costos de Hospital , Humanos , Hipertensión Portal/diagnóstico , Hipertensión Portal/economía , Hipertensión Portal/etiología , Tiempo de Internación , Cirrosis Hepática/diagnóstico , Cirrosis Hepática/economía , Pruebas de Función Hepática , Masculino , Persona de Mediana Edad , Derivación Portosistémica Intrahepática Transyugular/efectos adversos , Derivación Portosistémica Intrahepática Transyugular/economía , Complicaciones Posoperatorias/etiología , Recurrencia , Estudios Retrospectivos , Factores de Riesgo , Esplenectomía/efectos adversos , Esplenectomía/economía , Factores de Tiempo , Resultado del Tratamiento , Procedimientos Quirúrgicos Vasculares/efectos adversos , Procedimientos Quirúrgicos Vasculares/economía

RESUMEN

OBJECTIVE: To investigate the effect of CD86 gene modified recipient dendritic cell (DC) on mix cultured donor-derived islet with recipient-derived lymphocyte in vitro. METHODS: DCs were separated from bone marrow of BALB/c mice and identified by flow cytometry. Chemically synthesized CD86 siRNA was transferred into DC. Donor islets were separated from the pancreas of SD rats. Acridine orange (AO)/Propidium iodide (PI) staining was conducted to assess the viability of islets. Lymphocytes were collected from the spleen of SD rats and then co-cultured with CD86 gene modified recipient DCs. CD86 gene modified recipient DC, donor-derived islet (400 IEQ) and recipient-derived lymphocyte (1 x 10(6)) were mix cultured in vitro. Four groups were set: blank group (islets of SD rat only), control 1 group (islets of SD rat with splenic lymphocyte of BALB/c mice) , control 2 group (islets of SD rat, splenic lymphocyte of BALB/c mice with normal recipient DC) and experimental group (islets of rat, splenic lymphocyte of BALB/c mice with CD86 gene modified recipient DC). After 3 days culture, the cellular morphology of culture was observed with light inverted microscope. The levels of IL-2, IL-4, IL-10 and IFN-γ in the culture supernatant were tested, and islets viability was assessed by AO/PI staining. GSIS was conducted and stimulation index (SD was calculated. RESULTS: Typical DC morphology was found from the collected cells. The positive rates of CD1lc, CD80 and CD86 protein expression on DCs were 86.26% ± 9.73%, 72.64% ± 8.55% and 77.18% ± 10.23%, respectively. The positive rate of CD86 protein expression on DCs after transfection was 23.64% ± 5.25%. The viability of islets was over 95%. After 3 days culture, the level of IL-10 increased significantly and the levels of IL-2 and INF-γ decreased significantly in experimental group (vs. control 1 and control 2 groups, P < 0.05). The level of IL-4 was similar in control 1, control 2 and experimental groups, but the proliferation rate of lymphocyte in the experimental group was the lowest one, the viability of islets in the experimental group was the best and the SI was the highest. The levels of IL-2, IL-4, IL-10 and IFN-γ in the experimental group were higher than those in the blank group. CONCLUSION: CD86 gene modified recipient DC loaded with donor-derived antigen could protect the islet function in vitro to some extent.

Asunto(s)

Antígeno B7-2/genética , Células Dendríticas/citología , Islotes Pancreáticos/citología , Animales , Células Cultivadas , Interleucina-10 , Interleucina-2 , Interleucina-4 , Linfocitos , Ratones , Ratones Endogámicos BALB C , Ratas , Ratas Sprague-Dawley , Bazo/citología

RESUMEN

Our primary aim of the present study was to analyze the clinical characteristics and surgical outcome of nonfunctional pancreatic neuroendocrine tumors (non-F-P-NETs), with an emphasis on evaluating the prognostic value of the newly updated 2010 grading classification of the World Health Organization (WHO).Data of 55 consecutive patients who were surgically treated and pathologically diagnosed as non-F-P-NETs in our single institution from January 2000 to December 2013 were retrospectively collected.This entirety comprised of 55 patients (31 males and 24 females), with a mean age of 51.24 ± 12.95 years. Manifestations of non-F-P-NETs were nonspecific. Distal pancreatectomy, pancreaticoduodenectomy, and local resection of pancreatic tumor were the most frequent surgical procedures, while pancreatic fistula was the most common but acceptable complication (30.3%). The overall 5-year survival rate of this entire cohort was 41.0%, with a median survival time of 60.4 months. Patients who underwent R0 resections obtained a better survival than those who did not (P < 0.005). As for the prognostic analysis, tumor size and lymph invasion were only statistically significant in univariate analysis (P = 0.046 and P < 0.05, respectively), whereas the newly updated 2010 grading classification of WHO (G1 and G2 vs G3), distant metastasis, and surgical margin were all meaningful in both univariate and multivariate analysis (P = 0.045, 0.001, and 0.042, respectively).Non-F-P-NETs are a kind of rare neoplasm, with mostly indolent malignancy. Patients with non-F-P-NETs could benefit from the radical resections. The new WHO criteria, distant metastasis and surgical margin, might be independent predictors for the prognosis of non-F-P-NETs.

Asunto(s)

Pancreatectomía , Neoplasias Pancreáticas/cirugía , Adolescente , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Neoplasias Pancreáticas/diagnóstico , Neoplasias Pancreáticas/mortalidad , Pronóstico , Estudios Retrospectivos , Tasa de Supervivencia , Factores de Tiempo , Resultado del Tratamiento , Adulto Joven

Asunto(s)

Neoplasias Pancreáticas/diagnóstico , Ombligo/patología , Femenino , Humanos , Persona de Mediana Edad

RESUMEN

OBJECTIVE: The objective of this study was to evaluate the clinical consistency of the new World Health Organization 2010 grading and the European Neuroendocrine Tumor Society 2006 TNM staging systems on the surgical outcome for patients with pancreatic neuroendocrine tumors (p-NETs). Moreover, we will discuss their prognostic value. METHODS: The medical records of 110 consecutive patients with p-NETs who were surgically treated in our center from January 2002 to December 2012 were reviewed. RESULTS: Sixty-five patients were diagnosed as having neuroendocrine tumor G1, 27 patients had neuroendocrine tumor G2, 14 patients had neuroendocrine carcinoma G3, and 4 patients had mixed adenoneuro endocrine carcinoma; the survival rates at 5 years were 82.6%, 52.7%, 25.7%, and 0%, respectively (P < 0.001). The TNM stage was I in 48 patients, II in 39 patients, III in 11 patients, and IV in 12 patients; the 5-year survival rates were 83.1%, 72.1%, 0%, and 0%, respectively (P < 0.001). The patients who underwent R0 resection gained a statistically longer survival time than those who did not (P < 0.001). CONCLUSIONS: Both classifications accurately reflect the clinical outcome of p-NETs. Surgical margin, the World Health Organization 2010 grading, and the TNM staging systems may all be meaningful prognostic factors impacting the long-term survival of patients with p-NETs.

Asunto(s)

Clasificación del Tumor , Tumores Neuroendocrinos/patología , Neoplasias Pancreáticas/patología , Adolescente , Adulto , Anciano , Carcinoma Neuroendocrino/mortalidad , Carcinoma Neuroendocrino/patología , Carcinoma Neuroendocrino/cirugía , Carcinoma Ductal Pancreático/mortalidad , Carcinoma Ductal Pancreático/patología , Carcinoma Ductal Pancreático/cirugía , Terapia Combinada , Femenino , Estudios de Seguimiento , Humanos , Escisión del Ganglio Linfático/estadística & datos numéricos , Metástasis Linfática , Masculino , Persona de Mediana Edad , Clasificación del Tumor/normas , Estadificación de Neoplasias/normas , Tumores Neuroendocrinos/mortalidad , Tumores Neuroendocrinos/cirugía , Pancreatectomía/estadística & datos numéricos , Neoplasias Pancreáticas/mortalidad , Neoplasias Pancreáticas/cirugía , Pancreaticoduodenectomía/estadística & datos numéricos , Pronóstico , Sociedades Médicas , Análisis de Supervivencia , Resultado del Tratamiento , Carga Tumoral , Organización Mundial de la Salud , Adulto Joven

RESUMEN

BACKGROUND: The incidence of alkaline reflux gastritis (ARG) after pancreaticoduodenectomy (PD) is high. Although Braun enteroenterostomy (BEE) may reduce ARG, BEE may result in marginal ulcers (MUs) due to the additional anastomotic stoma. We conducted this study to compare clinical outcomes of using a modified BEE (MBEE) with traditional gastrojejunostomy (TGJ), by inducting a purse-string suture instead of an additional anastomotic stoma. MATERIALS AND METHODS: All 62 patients underwent standard PD at the Department of Hepatobiliopancreatic Surgery of West China Hospital between January 1, 2008 and January 31, 2012. Demographics, perioperative and postoperative factors, and follow-up morbidity were compared in those patients who underwent MBEE (n = 32, three patients were lost to follow-up) to those who underwent TGJ (n = 30, nine patients were lost to follow-up). RESULTS: Patients who underwent the MBEE experienced a decrease in total morbidity including ARG and MUs, relative to those who underwent TGJ (24.1% versus 58.3%, P = 0.011). With regard to the MBEE group, the total ARG rate was statistically significantly lower compared with the TGJ group (13.8% versus 37.5%, P = 0.046). In addition, the incidence of MUs was reduced. CONCLUSIONS: In patients undergoing PD, the MBEE was safely performed with significantly more patients having reduced incidence of ARG and related sequela compared with those who underwent TGJ. These results support further study of patients undergoing gastroenterostomy after resection of the distal stomach in larger, randomized studies.

Asunto(s)

Gastritis/epidemiología , Gastroenterostomía/métodos , Pancreaticoduodenectomía , Úlcera Péptica/epidemiología , Complicaciones Posoperatorias/epidemiología , China/epidemiología , Femenino , Gastritis/prevención & control , Gastritis/cirugía , Gastroenterostomía/mortalidad , Humanos , Masculino , Persona de Mediana Edad , Pancreaticoduodenectomía/métodos , Pancreaticoduodenectomía/mortalidad , Úlcera Péptica/cirugía , Estudios Prospectivos

RESUMEN

BACKGROUND: Pancreatic fistula (PF) is one of the most common complications after pancreaticoduodenectomy (PD). We described a new method of pancreaticojejunostomy (PJ) developed by combining triple-layer duct-to-mucosa PJ with resection of jejunal serosa, which was named as modified layer-to-layer PJ (MLLPJ). The aim of the present study was to observe whether the new technique would effectively reduce the PF rate in comparison with two-layer duct-to-mucosa PJ (TLPJ). METHODS: Data on 184 consecutive patients who underwent the two methods of PJ after standard PD between January 1, 2010 and January 31, 2013 were collected retrospectively from a prospective database. The primary endpoint was the PF rate. The risk factors of PF were investigated by using univariate and multivariate analyses. RESULTS: A total of 88 patients received TLPJ and 96 underwent MLLPJ. Rate of PF for the entire cohort was 8.2%. There were 11 fistulas (12.5%) in the TLPJ group and four fistulas (4.2%) in the MLLPJ group (P = 0.039). Body mass index, pancreatic texture, pancreatic duct diameter, and methods of PJ anastomosis had significant effects on the formation of PF on univariate analysis. Multivariate analysis showed that pancreatic duct diameter ≤3 mm and TLPJ were the significant risk factors of PF. CONCLUSIONS: MLLPJ effectively reduces the PF rate after PD in comparison with TLPJ. Results confirm increased PF rates in patients with pancreatic duct diameter ≤3 mm compared with pancreatic duct diameter >3 mm.

Asunto(s)

Yeyuno/cirugía , Fístula Pancreática/prevención & control , Pancreaticoduodenectomía/efectos adversos , Pancreatoyeyunostomía/métodos , Complicaciones Posoperatorias/prevención & control , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Conductos Pancreáticos/patología , Conductos Pancreáticos/cirugía , Fístula Pancreática/etiología , Estudios Retrospectivos , Factores de Riesgo

RESUMEN

BACKGROUND: No consensus exists as to whether laparoscopic treatment for pancreatic insulinomas (PIs) is safe and feasible. The aim of this meta-analysis was to assess the feasibility, safety, and potential benefits of laparoscopic approach (LA) for PIs. The abovementioned approach is also compared with open surgery. METHODS: A systematic literature search (MEDLINE, EMBASE, Cochrane Library, Science Citation Index, and Ovid journals) was performed to identify relevant articles. Articles that compare the use of LA and open approach to treat PI published on or before April 30, 2013, were included in the meta-analysis. The evaluated end points were operative outcomes, postoperative recovery, and postoperative complications. RESULTS: Seven observational clinical studies that recruited a total of 452 patients were included. The rates of conversion from LA to open surgery ranged from 0%-41.3%. The meta-analysis revealed that LA for PIs is associated with reduced length of hospital stay (weighted mean difference, -5.64; 95% confidence interval [CI], -7.11 to -4.16; P < 0.00001). No significant difference was observed between LA and open surgery in terms of operation time (weighted mean difference, 2.57; 95% CI, -10.91 to 16.05; P = 0.71), postoperative mortality, overall morbidity (odds ratio [OR], 0.64; 95% CI, 0.35-1.17; P = 0.14], incidence of pancreatic fistula (OR, 0.86; 95% CI, 0.51-1.44; P = 0.56), and recurrence of hyperglycemia (OR, 1.81; 95% CI, 0.41-7.95; P = 0.43). CONCLUSIONS: Laparoscopic treatment for PIs is a safe and feasible approach associated with reduction in length of hospital stay and comparable rates of postoperative complications in relation with open surgery.

Asunto(s)

Insulinoma/cirugía , Laparoscopía , Neoplasias Pancreáticas/cirugía , Adulto , Femenino , Mortalidad Hospitalaria , Humanos , Laparoscopía/efectos adversos , Tiempo de Internación , Masculino , Persona de Mediana Edad , Morbilidad

RESUMEN

BACKGROUND: The safety of pancreaticoduodenectomy has improved significantly. However, alkaline reflux gastritis and marginal ulcer are two substantial problems after pancreaticoduodenectomy. AIMS: To identify whether Child reconstruction with a modified Braun enteroenterostomy decreases the incidence of alkaline reflux gastritis and marginal ulcer after pancreaticoduodenectomy better than Roux-en-Y reconstruction. METHODS: Data on 57 consecutive patients who underwent standard pancreaticoduodenectomy between January 1, 2008 and January 31, 2012 were collected prospectively. Data on early and late complications of the Child reconstruction with a modified Braun enteroenterostomy and Roux-en-Y were gathered. The risk factors of alkaline reflux gastritis and marginal ulcer were also investigated by using univariate and multivariate analyses. RESULTS: Twenty-five patients received Roux-en-Y and 32 underwent Child reconstruction with a modified Braun enteroenterostomy. Early complications after the two reconstruction methods were insignificant. Significant differences in terms of later postoperative morbidity (P = 0.01) and change in body mass index (P = 0.03) were found 12 months after pancreaticoduodenectomy. No significant difference for alkaline reflux gastritis was observed between the two methods (14.8 vs. 28.6 %, P = 0.24). Marginal ulcer occurred significantly lower in patients with the modified reconstruction than in those with Roux-en-Y reconstruction (11.1 vs. 47.6 %, P = 0.01). Peptic ulcer history, diabetes mellitus, and reconstruction type had a significant effect on marginal ulcer formation. CONCLUSIONS: Child reconstruction with a modified Braun enteroenterostomy offers an advantage with respect to marginal ulcer after standard pancreaticoduodenectomy, potentially decreasing the incidence of alkaline reflux gastritis as effectively as Roux-en-Y reconstruction.

Asunto(s)

Úlcera Duodenal/etiología , Enterostomía/métodos , Gastritis/prevención & control , Pancreaticoduodenectomía/efectos adversos , Úlcera Duodenal/patología , Femenino , Humanos , Concentración de Iones de Hidrógeno , Masculino , Persona de Mediana Edad

RESUMEN

BACKGROUND/AIMS: The aim of this study is to evaluate the effectiveness of using an internal stent for pancreaticojejunostomy (PJ) on pancreatic fistula (PF) formation, as well as on the overall outcome for patients undergoing pancreatic resections. METHODOLOGY: Articles published until the end of February 2012 comparing internal stenting and no stenting for PI were included. The primary outcome of interest was PF. The secondary outcome of interest included operative time, intra-operative blood loss, overall morbidity, hospital mortality and postoperative length of hospital stay. RESULTS: Five articles were identified for inclusion. The meta-analysis revealed that internal stenting for PJ was not associated with a statistically significant reduction in PF rate (OR 1.03; 95% CI=0.70 to 1.51; p=0.88). Patients with soft pancreas had higher PF rate in stenting group, but the difference was not significant (OR=1.71; 95% CI=0.95 to 3.10; p=0.08). There was no significant difference between the two groups in operative time, intra-operative blood loss, overall morbidity, hospital mortality, and postoperative length of hospital stay. CONCLUSIONS: The current literature suggests that internal stenting for PJ following pancreatic resections does not decrease the rate of pancreatic fistula or alter overall patient's outcome.

Asunto(s)

Pancreatectomía/efectos adversos , Fístula Pancreática/prevención & control , Pancreatoyeyunostomía/efectos adversos , Stents , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias/prevención & control

RESUMEN

AIM: To evaluate whether antecolic reconstruction for duodenojejunostomy (DJ) can decrease delayed gastric emptying (DGE) rate after pylorus-preserving pancreaticoduodenectomy (PPPD) through literature review and meta-analysis. METHODS: Articles published between January 1991 and April 2012 comparing antecolic and retrocolic reconstruction for DJ after PPPD were retrieved from the databases of MEDLINE (PubMed), EMBASE, OVID and Cochrane Library Central. The primary outcome of interest was DGE. Either fixed effects model or random effects model was used to assess the pooled effect based on the heterogeneity. RESULTS: Five articles were identified for inclusion: two randomized controlled trials and three non-randomized controlled trials. The meta-analysis revealed that antecolic reconstruction for DJ after PPPD was associated with a statistically significant decrease in the incidence of DGE [odds ratio (OR), 0.06; 95% CI, 0.02-0.17; P < 0.00001] and intra-operative blood loss [mean difference (MD), -317.68; 95% CI, -416.67 to -218.70; P < 0.00 001]. There was no significant difference between the groups of antecolic and retrocolic reconstruction in operative time (MD, 25.23; 95% CI, -14.37 to 64.83; P = 0.21), postoperative mortality, overall morbidity (OR, 0.54; 95% CI, 0.20-1.46; P = 0.22) and length of postoperative hospital stay (MD, -9.08; 95% CI, -21.28 to 3.11; P = 0.14). CONCLUSION: Antecolic reconstruction for DJ can decrease the DGE rate after PPPD.

Asunto(s)

Duodenostomía , Vaciamiento Gástrico , Gastroparesia/prevención & control , Yeyunostomía , Pancreaticoduodenectomía/efectos adversos , Procedimientos de Cirugía Plástica , Anciano , Anciano de 80 o más Años , Distribución de Chi-Cuadrado , Duodenostomía/efectos adversos , Duodenostomía/mortalidad , Femenino , Gastroparesia/etiología , Gastroparesia/mortalidad , Gastroparesia/fisiopatología , Humanos , Yeyunostomía/efectos adversos , Yeyunostomía/mortalidad , Tiempo de Internación , Masculino , Persona de Mediana Edad , Oportunidad Relativa , Pancreaticoduodenectomía/métodos , Pancreaticoduodenectomía/mortalidad , Procedimientos de Cirugía Plástica/efectos adversos , Procedimientos de Cirugía Plástica/mortalidad , Factores de Riesgo , Factores de Tiempo , Resultado del Tratamiento

RESUMEN

OBJECTIVE: To investigate the expressions of Bcl-2 and Beclin-1 in pancreatic cancer and analyze the correlation between them. METHODS: The pancreatic tissue samples were collected from each 6 cases of pancreatic cancer, pancreatic exocrine benign tumor, chronic pancreatitis and normal pancreas and marked as group A, group B, group C and group D, respectively. The mRNA expression levels of Bcl-2 and Beclin-1 were detected by real-time fluorescence quantitative PCR and the protein expression levels of Bcl-2 and Beclin-1 were detected through immunohistochemistry. RESULTS: The expression levels of Bcl-2 mRNA and protein, were the lowest in group D and the highest in group A (P < 0.05). The expression levels of Beclin-1 mRNA and protein in group A were significantly lower than those in group B and group D (P < 0.05). However, the expression levels of Beclin-1 between group A and group C were not significantly different (P > 0.05). The correlation coefficient between Bcl-2 and Beclin-1 protein expression in pancreatic cancer is--0.827 (P = 0. 042). CONCLUSION: Compared with normal pancreatic tissue, pancreatic cancer had Bcl-2 expression upregulated and Beclin-1 expression downregulated. The increased anti-apoptotic effect of Bcl-2 and the decreased autophagic effect of Beclin-1 may collaboratively contribute to the occurrence of pancreatic cancer.

Asunto(s)

Adenocarcinoma/metabolismo , Proteínas Reguladoras de la Apoptosis/metabolismo , Apoptosis , Proteínas de la Membrana/metabolismo , Neoplasias Pancreáticas/metabolismo , Proteínas Proto-Oncogénicas c-bcl-2/metabolismo , Adulto , Anciano , Proteínas Reguladoras de la Apoptosis/genética , Beclina-1 , Carcinoma Ductal Pancreático/metabolismo , Femenino , Humanos , Masculino , Proteínas de la Membrana/genética , Persona de Mediana Edad , Proteínas Proto-Oncogénicas c-bcl-2/genética , ARN Mensajero/genética , ARN Mensajero/metabolismo

RESUMEN

OBJECTIVE: Patients with liver cirrhosis suffer from hyperinsulinemia, hyperglucagonemia and a certain degree of insulin resistance, and portosystemic shunts may be involved in the etiology. A transjugular intrahepatic portosystemic shunt (TIPS) as a treatment for the complications of portal hypertension leads to hemodynamic changes. The objective of the present study is to evaluate whether TIPS can also affect glycometabolism in cirrhosis patients. METHODS: Forty-six liver cirrhosis patients (experimental group [EG]) without diabetes who underwent TIPS were evaluated. Portal venous pressure (PVP), cardiac output (CO) and blood flow in the shunt (BFS) were measured or calculated before TIPS, after 15 minutes and, finally, after 90 days. Twenty-five liver cirrhosis patients without diabetes and without TIPS were included as the control group (CG). Oral glucose tolerance tests (OGTTs) were carried out at 0, 1, 7, 30 and 90 days after TIPS or after inclusion in the study. Indices related to glycometabolism and liver function, which included biochemical values, were also investigated. RESULTS: PVP changed immediately from 39.43 ± 1.29 cmH(2)O to 21.43 ± 1.42 cmH(2)O and remained stable thereafter. A pronounced increase in CO was observed after TIPS, while BFS did not change significantly. Also, glycosylated hemoglobin A(1c) (HbA(1c)), fasting plasma glucose (FPG), fasting plasma C-peptide (FPC), glucagon-like peptide-1 (GLP-1) and 2-h post-challenge plasma glucose (2 hPG) were non significantly increased after the shunt. Statistically significant hyperinsulinemia and hyperglucagonemia persisted for 90 days after TIPS. In addition, TIPS was followed by an increase in insulin resistance (IR) and ß-cell function. Thirty-four patients in the EG and 15 in the CG were diagnosed with diabetes or prediabetes after 90 days. No significant differences in biochemical values were observed 90 days after the shunt. CONCLUSION: In addition to causing hemodynamic changes, TIPS augments hyperglucagonemia because of increased secretion and decreased clearance of glucagon in the liver, whereas IR deteriorates after the procedure. However, glycemic control does not worsen after TIPS, and the procedure is not associated with a higher risk of diabetes largely because of the simultaneous increase in insulin.

Asunto(s)

Glucagón/biosíntesis , Hormonas/biosíntesis , Hiperinsulinismo/etiología , Hipertensión Portal/cirugía , Cirrosis Hepática/sangre , Derivación Portosistémica Intrahepática Transyugular , Adulto , Anciano , Algoritmos , Gasto Cardíaco , Estudios de Casos y Controles , Diabetes Mellitus/diagnóstico , Femenino , Prueba de Tolerancia a la Glucosa , Humanos , Hipertensión Portal/etiología , Resistencia a la Insulina , Cirrosis Hepática/complicaciones , Masculino , Persona de Mediana Edad , Derivación Portosistémica Intrahepática Transyugular/efectos adversos , Derivación Portosistémica Intrahepática Transyugular/métodos , Cuidados Posoperatorios , Estado Prediabético/diagnóstico , Valor Predictivo de las Pruebas , Cuidados Preoperatorios , Sensibilidad y Especificidad , Resultado del Tratamiento

RESUMEN

OBJECTIVE: To identify differentially expressed proteins between pancreatic tumor tissues and the adjacent noncancerous tissues by comparative proteomics analysis. METHODS: Six pairs pancreatic tumor tissues and the adjacent noncancerous tissues were obtained and selected for two-dimensional polyacrylamide gel electrophoresis (2-DE) analysis. The differentially expressed proteins were identified using the PDQuest 2-D analysis software. After cutting and enzymolysis, the differentially expressed proteins were analysised by ESI-Q-TOF mass spectrometer. The MS/MS data were acquired and searched in the Swiss-Prot database using MASCOT software. Altered expression of representative proteins was validated by immunohistochemical staining. RESULTS: A total of 97 points were identified as differentially expressed by two-dimensional gel electrophoresis, of which 31 were successfully identified by ESI-Q-TOF mass spectrometer. Among the proteins identified by mass spectrometer, 23 were upregulated and the other 8 were downregulated. These proteins were involved in different functional processes and protein families: glucolysis, hyaluronidase, I, II-phase metabolic enzymes, metalloproteinase, cytoskeleton, Ca2+ metabolism and so on. Immunohistochemical staining revealed an overexpression of HYAL1 and low expression of CYP2C8 and GSTM2 in pancreatic tumor. CONCLUSION: The differentially expressed proteins between pancreatic tumor tissues and the adjacent noncancerous tissues can be identified by comparative proteomics approach. The selected proteins will provide a valuable clue and help for further research.

Asunto(s)

Proteínas de Neoplasias/análisis , Neoplasias Pancreáticas/química , Proteoma/análisis , Proteómica/métodos , Anciano , Electroforesis en Gel Bidimensional , Femenino , Humanos , Masculino , Persona de Mediana Edad