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1.
Pharmaceuticals (Basel) ; 14(4)2021 Apr 01.
Article in English | MEDLINE | ID: mdl-33916212

ABSTRACT

The O-glycosylation of resveratrol increases both its solubility in water and its bioavailability while preventing its oxidation, allowing a more efficient use of this molecule as a bioactive ingredient in pharmaceutical and cosmetic applications. Resveratrol O-glycosides can be obtained by enzymatic reactions. Recent developments have made it possible to selectively obtain resveratrol α-glycosides from the ß-cyclodextrin-resveratrol complex in water with a yield of 35%. However, this yield is limited by the partial hydrolysis of the resveratrol glycosides produced during the reaction. In this study, we propose to intensify this enzymatic reaction by coupling the enzymatic reactor to a membrane process. Firstly, membrane screening was carried out at the laboratory scale and led to the choice of a GE polymeric membrane with a cut-off of 1 kDa. This membrane allowed the retention of 65% of the ß-cyclodextrin-resveratrol complex in the reaction medium and the transfer of 70% of the resveratrol α-O-glycosides in the permeate. In a second step, this membrane was used in an enzymatic membrane reactor and improved the yield of the enzymatic glycosylation up to 50%.

2.
Rev Gastroenterol Peru ; 33(1): 66-74, 2013.
Article in Spanish | MEDLINE | ID: mdl-23539059

ABSTRACT

Ohashi described for the first time the IPMN on 1982 as a pancreatic neoplasia with mucine cells forming papillae and producing dilatation of the main pancreatic duct or its branches. The IPMN represent the 1% of the pancreatic tumors and 5% of the cystic neoplasias. It is potentially malignant in a period of five years being more frequent in males between 60-70 and clinically these patients' presents as acute, recurrent or chronic pancreatitis, with an incidence of malignancy from 25% to 70%. CT scan and cholangio MRI allows the diagnosis, the variety, localization and possibility of determine malignancy. The treatment is the Whipple resection. We are reporting the case of an obese middle age male, being observed along the last 10 years because of recurrent pancreatitis with a cystic lesion of the head of the pancreas. The CT scan, endoscopic-ultrasound and the analysis of the liquid content suggested a mucinous lesion, reason why the patient underwent a pancreatic-duodenal resection. The histology study confirms the diagnosis of IPMN.


Subject(s)
Adenocarcinoma, Mucinous/complications , Carcinoma, Pancreatic Ductal/complications , Pancreatic Neoplasms/complications , Pancreatitis/complications , Humans , Male , Middle Aged , Recurrence
3.
Rev. gastroenterol. Perú ; 33(1): 66-74, ene.-mar. 2013. ilus
Article in Spanish | LILACS, LIPECS | ID: lil-692423

ABSTRACT

La neoplasia Intraductal papilar quística mucinosa (NIPM) fue descrita por primera vez en 1982 por Ohashi, como una neoplasia del páncreas caracterizada por una proliferación de células neoplásicas mucinosas, que forman papilas y causan dilatación del ducto principal o sus ramas. Las NIPM representan el 1% de las neoplasias pancreáticas y el 25% de las neoplasias quísticas. Son potencialmente malignas, progresan desde una lesión benigna hasta carcinoma en un promedio de 5 años. Afecta con mayor frecuencia al sexo masculino entre 60 y 70 años, con síntomas de pancreatitis crónica o pancreatitis aguda recidivante y se localiza preferentemente en la cabeza y proceso uncinado. La clasificación depende de su localización, en variante ducto principal, variante rama lateral o mixto y la importancia radica en el pronóstico, con incidencia de cáncer que varía de 25% a 70%. Las imágenes (T.E.M y Colangio RM) nos permiten establecer el diagnóstico, la variedad, la localización, la extensión y determinar indicios de benignidad o malignidad. Además la eco endoscopía nos permite obtener una muestra y poder estudiar el líquido del quiste. El tratamiento de estas neoplasias es la duodeno pancreatectomía de Whipple. Reportamos un paciente obeso, con historia de pancreatitis recurrente, observado a lo largo de 10 años por una lesión quística del páncreas que creció en los últimos 24 meses. El estudio eco endoscópico y el análisis del líquido del quiste orientó al diagnóstico de NIPM por lo que se le sometió a una resección duodeno pancreática con evolución favorable. El estudio histológico confirmó el diagnóstico de NIPM.


Ohashi described for the first time the IPMN on 1982 as a pancreatic neoplasia with mucine cells forming papillae and producing dilatation of the main pancreatic duct or its branches. The IPMN represent the 1% of the pancreatic tumors and 5% of the cystic neoplasias. It is potentially malignant in a period of five years being more frequent in males between 60-70 and clinically these patients’ presents as acute, recurrent or chronic pancreatitis, with an incidence of malignancy from 25% to 70%. CT scan and cholangio MRI allows the diagnosis, the variety, localization and possibility of determine malignancy. The treatment is the Whipple resection. We are reporting the case of an obese middle age male, being observed along the last 10 years because of recurrent pancreatitis with a cystic lesion of the head of the pancreas. The CT scan, endoscopic-ultrasound and the analysis of the liquid content suggested a mucinous lesion, reason why the patient underwent a pancreatic-duodenal resection. The histology study confirms the diagnosis of IPMN.


Subject(s)
Humans , Male , Middle Aged , Adenocarcinoma, Mucinous/complications , Carcinoma, Pancreatic Ductal/complications , Pancreatic Neoplasms/complications , Pancreatitis/complications , Recurrence
4.
Rev Gastroenterol Peru ; 23(3): 192-8, 2003.
Article in Spanish | MEDLINE | ID: mdl-14532920

ABSTRACT

The clinical and safety efficacy of a new wide spectrum beta-lactam agent for most pathogen intra-abdominal infection germs is evaluated herein. Its chemical name is Ertapenem (MK-0826). Its pharmacokinetic characteristics and the known antibacterial spectrum enable the potential use of one daily dose in the treatment of infections by aerobic and anaerobic bacteria. This is a sub-group of patients that have been treated within a multinational, prospective, randomized, controlled and double-blind study, to compare the safety and efficacy of ertapenem (100% vs 88%) with piperacillin/tazobactam in patients that have undergone surgery due to complicated intra-abdominal infection, from April 1998 to October 1999, pursuant to the IDSA/FDA standards. Twenty local patients were evaluated from a total of 623 patients in 17 countries. Acute perforated appendicitis was the most frequent pathology in both groups. The recovery ratio was slightly higher in the group, which was administered ertapenem, with no documented clinical failure. This study shows the efficacy of ertapenem in the treatment of intra-abdominal infections using a single 1-gr/day dose, equivalent to 3.375 gr of piperacillin/tazobactam every six hours. Tolerance and safety were similar in both groups. No side effects, or mortality cases were registered. The results of this study indicate that ertapenem might be the therapeutic option to discard the combination of antibiotics or the use of multiple doses in intra-abdominal infections.


Subject(s)
Abdominal Abscess/drug therapy , Anti-Bacterial Agents/therapeutic use , Lactams , Penicillanic Acid/analogs & derivatives , Penicillanic Acid/therapeutic use , Piperacillin/therapeutic use , beta-Lactams/therapeutic use , Abdominal Abscess/microbiology , Adult , Aged , Double-Blind Method , Ertapenem , Female , Humans , Male , Middle Aged , Prospective Studies , Sepsis/drug therapy , Sepsis/microbiology , Tazobactam , Treatment Outcome
5.
Rev Gastroenterol Peru ; 18 Suppl 1: 67-75, 1998.
Article in Spanish | MEDLINE | ID: mdl-12271338

ABSTRACT

In the last few years, an enormous progress has been achieved in the treatment of Colorectal Cancer due to a better know ledge of the biology, natural history, prevention and treatment of colon and rectum adenocarcinoma. Genetic alterations produce changes in thecolonic mucosa that lead to the formation of adenoma and eventually, its transformation into cancer. At present, it is well established that the Adenomatous Polyp preceeds Colorectal Cancer. The average span of time from normal mucosa to Adenomatous Polyp is about 5 years, and it takes around 5 more years for the Adenomatous Polyp to transform into cancer. The treatment of patients with Colorectal Cancer varies from Endoscopic Polypectomy or formal surgical resection to combined multidisciplinary strategies, according with the stage of the disease. Endoscopic Polypectomy has helped to avoid multiple operations that were performed in the past, it also reduces significantly the development of a second cancer in cured patients who had suffered Colon Cancer. The prognosis of node-negative patients is excellent with a 5 year survival of 80 per cent. Adjuvant chemotherapy has proven to be effective in node-positive Colon Cancer, improving the overall survival. In Rectum Cancer, the use of staplers and changes in the surgical technique have reduced the number of abdominoperineal resections, preserving the annal sphincter and improving the quality of life in patients. Adjuvant chemoradiation control groups and historical controls show a local recurrence of 20-45 per cent in node-positive Rectum Cancer, and 15-30 per cent in node-negative patients. Recently, the improvement of the lateral dissection reduces recurrence in 10 per cent, avoiding pelvic pain, although overall survival has not been improved. Local excision of early lesions from the rectum is an interesting choice in patients who have been carefully selected. We believe that in the following years, the clinical appearance of Colorectal Cancer can be prevented with a better knowledge of its molecular biology.

6.
Rev. gastroenterol. Perú ; 18(supl.1): 67-75, 1998. graf
Article in Spanish | LILACS | ID: lil-227713

ABSTRACT

El tratamiento del cáncer Colo Rectal ha progresado enormemente en los últimos años debido al mejor conocimiento de la biología, historia natural, prevención y manejo del adenocarcinoma del colon y recto. Alteraciones genéticas producen cambios de la mucosa colónica que conllevan a la formación de adenoma y su eventual transformación a cancer. Actualmente, se ha establecido que el pólipo adenomatoso procede al cáncer colo-rectal. El promedio de tiempo de transformación de la mucosa normal pólipo adenomatoso es de 5 años y 5 años más de pólipo adenomatoso a cáncer. El tratamiento de pacientes con cáncer colo-rectal varía de polipectomía endoscópica y/o una resección quirúrgica formal a tratamientos multidisciplinarios de acuerdo con el estadío de la enfermedad. La polipectomía endoscópica ha evitado las múltiples operaciones del pasado y reduce marcadamente la aparición de un segundo cáncer en pacientes curados, operados por cáncer de colon. El pronóstico de los pacientes con ganglios negativos es exelente con sobrevida a 5 años de 80 por ciento. La quimioterapia adyuvante ha demostrado su efecto en cáncer de colon con ganglios positivos, mejorando el tiempo libre de enfermedad y la sobrevida global. En cáncer de recto el uso de grapas y cambios en la técnica quirúrgica han disminuído, el numero de resecciones abdomino-perineales, conservando el esfínter anal y mejorando la calidad de vida de los pacientes. En grupos control de quimio-radiación adyuvante y controles históricos demuestran una recurrencia local de 20-45 por ciento en cáncer de recto con ganglios positivos y 15-30 por ciento en pacientes con ganglios negativos. Recientemente la mejora de la disección lateral reduce la recurrencia local a 10 por ciento evitando el dolor pélvico, aún cuando no se mejore la sobrevida global. La escisión local de lesiones tempranas del recto es una alternativa interesante en pacientes muy seleccionados, estamos seguros que en los próximos años con el mejor conocimiento de la biología molecular del cáncer colo-rectal se podrá prevenir su presentación clínica.


Subject(s)
Colonic Neoplasms/surgery , Colonic Neoplasms/therapy , Rectal Neoplasms/surgery , Rectal Neoplasms/therapy
7.
Trib. méd. (Bogotá) ; 87(6): 305-12, jun. 1993.
Article in Spanish | LILACS | ID: lil-183517

ABSTRACT

La sepsis intraabdominal es una patología frecuente en todo el mundo, con gran repercusión clínica y elevada mortalidad. En la era preantibiótica esta infección era prácticamente mortal y solamente se recuperaban los pacientes que por sus propios mecanismos inmunológicos localizaban los procesos sépticos y en quienes era posible el drenaje espontáneo en algunos o quirúrgicamente en otros. En el presente artículo se pasa revista a la etiología, diagnóstica y tratamiento de esta patología desde una perspectiva contemporánea en una verdadera puesta al día en el tema.


Subject(s)
Humans , Peritonitis/diagnosis , Peritonitis/etiology , Peritonitis/therapy , Sepsis , Abdomen/microbiology , Abdomen/pathology , Anti-Bacterial Agents , Abdomen, Acute
8.
Cir. rev. Soc. Cir. Perú ; 2(3): 131-4, sept.-dic. 1985. tab
Article in Spanish | LILACS, LIPECS | ID: lil-53349

ABSTRACT

Se presenta 281 pacientes con diagnóstico de colecistitis aguda que fueron operados tempranamente en el curso de una hospitalización. El diagnóstico clínico fue confirmado por colangiografía médica en los primeros años y por ecosonografía en los últimos. Los pacientes fueron intervenidos entre las 24 y 72 horas y se practicó la colecistectomía en el 97.6% reservándose la colecistostomía (2.4) para los pacientes de muy alto riesgo. La mortalidad operatoria fue del 5% especialmente en los enfermos mayores de 60 años, siendo la causa mas frecuente la sepsis no controlada. En el 55% de los casos los hallazgos operatorios evidenciaron colecistitis complicada con empiema, gangrena y perforación libre o localizada. El tiempo de preparación y evolución pre-operatoria fue de 3 días y el post-operatorio de 13 días


Subject(s)
Adolescent , Adult , Middle Aged , Humans , Male , Female , Cholecystectomy , Cholecystitis/surgery , Acute Disease
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