Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 13 de 13
Filtrar
Mais filtros










Base de dados
Tipo de estudo
Intervalo de ano de publicação
1.
BMC Surg ; 22(1): 5, 2022 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-34996411

RESUMO

BACKGROUND: The frequency of gallstones is higher in patients who have undergone gastrectomy than in the general population. While there have been some studies of gallstone formation after open gastrectomy, there are few reports of gallstones after laparoscopic gastrectomy (LG). Therefore, this study aimed to evaluate the incidence of gallstones after LG. METHODS: We retrospectively reviewed the records of 184 patients who underwent LG between January 2011 and May 2016 at Saiseikai Utsunomiya Hospital. After gastrectomy, abdominal ultrasonography was generally performed every 6 months for 5 years. Patients who underwent cholecystectomy before LG, underwent simultaneous cholecystectomy, and did not undergo abdominal ultrasonography, with an observation period of < 24 months, were excluded from the study. Finally, 90 patients were analyzed. Laparoscopic cholecystectomy was performed whenever biliary complications occurred. Patient characteristics were compared using the two-tailed Fisher's exact test or Chi-square test. In addition, the risk factors for postoperative gallstones were analyzed using logistic regression analysis. RESULTS: Among the 90 patients included in this study, 60 were men (78%), and the mean age was 65.5 years. Laparoscopic total gastrectomy was performed for 15 patients and laparoscopic distal gastrectomy for 75 patients. D2 lymph node dissection was performed for 8 patients (9%), whereas 68 patients underwent LG with Roux-en-Y reconstruction (76%). Gallstones were detected after LG in 27 of the 90 (30%) patients. Multivariate analysis identified Roux-en-Y reconstruction and male sex as significant risk factors of gallstones after gastrectomy. The incidence of gallstones was significantly higher (53%) in male patients who underwent Roux-en-Y reconstruction. Symptomatic gallstones after laparoscopic cholecystectomy were found in 6 cases (6/27, 22%), and all patients underwent laparoscopic cholecystectomy. CONCLUSION: Roux-en-Y reconstruction and male sex were identified as significant risk factors for gallstones after LG.


Assuntos
Cálculos Biliares , Laparoscopia , Neoplasias Gástricas , Idoso , Cálculos Biliares/diagnóstico por imagem , Cálculos Biliares/epidemiologia , Cálculos Biliares/etiologia , Gastrectomia/efeitos adversos , Humanos , Laparoscopia/efeitos adversos , Masculino , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Estudos Retrospectivos , Fatores de Risco , Neoplasias Gástricas/epidemiologia , Neoplasias Gástricas/cirurgia
2.
Neuropsychopharmacol Rep ; 40(2): 182-189, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32337858

RESUMO

AIMS: Recently, we identified a novel orexin 2 (OX2 ) receptor antagonist, SDM-878 (2-(3-(2-(1H-pyrazol-1-yl)nicotinoyl)-3,8-diazabicyclo[3.2.1]octan-8-yl)-3-methoxyisonicotinonitrile). The purpose of the present study is to characterize the in vitro and in vivo pharmacological effects of SDM-878. METHODS: The in vitro potency and selectivity of SDM-878 were examined in CHO cells that exhibit stable expression of human orexin 1 (OX1 ), human orexin 2 (OX2 ), rat OX1 , and rat OX2 receptors. Then, the plasma half-life, oral bioavailability, and brain penetration of SDM-878 were examined in rats. The in vivo effect of SDM-878 in rats was tested using electroencephalography (EEG). The target engagement of SDM-878 in the rat brain was examined using the antagonistic effect against hyperlocomotion caused by the intracerebroventricular administration of the OX2 receptor agonist, ADL-OXB ([Ala11 , d-Leu15 ]-orexin B). RESULTS: SDM-878 showed potent inhibitory activities for human and rat OX2 receptors with IC values of 10.6 and 8.8 nM, respectively, and approximately 1000-fold selectivity against the OX1 receptor. In rat studies, SDM-878 exhibited a relatively short half-life in plasma, oral bioavailability, and good brain penetration. These data indicate that SDM-878 is a potent, selective, orally active, and brain-penetrable OX2 receptor antagonist. In behavioral studies using rats, SDM-878 (100 mg/kg) antagonized hyperlocomotion caused by intracerebroventricular administration of ADL-OXB. SDM-878 exhibited a potent sleep-promoting effect at the same dose (100 mg/kg) in a rat EEG study. CONCLUSION: Our results suggest that SDM-878 is likely to be a good pharmacological tool for investigating the role of the OX2 receptor and may have therapeutic potential for the treatment of insomnia.


Assuntos
Antagonistas dos Receptores de Orexina/administração & dosagem , Antagonistas dos Receptores de Orexina/química , Receptores de Orexina/metabolismo , Administração Oral , Animais , Células CHO , Cricetinae , Cricetulus , Eletroencefalografia/efeitos dos fármacos , Eletroencefalografia/métodos , Humanos , Masculino , Orexinas/administração & dosagem , Orexinas/química , Ratos , Ratos Sprague-Dawley
3.
J Pharm Sci ; 109(8): 2622-2628, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32339528

RESUMO

Equilibrative nucleobase transporter 1 (ENBT1/SLC43A3) has recently been identified as a purine-selective nucleobase transporter. Although it is highly expressed in the liver, its role in nucleobase transport has not been confirmed yet in hepatocytes or any relevant cell models. We, therefore, examined its role in adenine transport in the HepG2 cell line as a human hepatocyte model. The uptake of [3H]adenine in HepG2 cells was highly saturable, indicating the involvement of carrier-mediated transport. The carrier-mediated transport component, for which the Michaelis constant was estimated to be 0.268 µM, was sensitive to decynium-22, an ENBT1 inhibitor, with the half maximal inhibitory concentration of 2.59 µM, which was comparable to that of 2.30 µM for [3H]adenine uptake by ENBT1 in its transient transfectant human embryonic kidney 293 cells. Although equilibrative nucleoside transporter 1 (ENT1/SLC29A1) and ENT2/SLC29A2 are also known to be able to transport adenine, [3H]adenine uptake in HepG2 cells was not inhibited by the ENT1/2-specific inhibitor of either dipyridamole or nitrobenzylthioinosine. Finally, [3H]adenine uptake was extensively reduced by silencing of ENBT1 by RNA interference in the hepatocyte model. All these results, taken together, suggest the predominant role of ENBT1 in the uptake of adenine in HepG2 cells.


Assuntos
Transportador Equilibrativo 1 de Nucleosídeo , Transportador Equilibrativo 2 de Nucleosídeo , Adenina , Sistemas de Transporte de Aminoácidos/metabolismo , Transporte Biológico , Transportador Equilibrativo 1 de Nucleosídeo/genética , Transportador Equilibrativo 1 de Nucleosídeo/metabolismo , Transportador Equilibrativo 2 de Nucleosídeo/genética , Transportador Equilibrativo 2 de Nucleosídeo/metabolismo , Células Hep G2 , Humanos
4.
Pharmacol Rep ; 71(6): 1147-1150, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31655279

RESUMO

BACKGROUND: The orexin system regulates various functions, including sleep/wake cycles, feeding, and cognition. Orexin A and orexin B are endogenous neuropeptides for both orexin 1 (OX1) and orexin 2 (OX2) receptors. Orexin A has a potent agonistic activity for both the receptors and is known to increase locomotor activity in rats. However, it has not been elucidated how each receptor contributes to orexin A-induced hyperlocomotion. METHODS: We examined the effects of an OX1 receptor antagonist, SB 334867, and an OX2 receptor antagonist, EMPA, as well as an OX1 and OX2 receptor antagonist on hyperlocomotion caused by intracerebroventricular administration of orexin A or an OX2 receptor agonist, ADL-OXB ([Ala11,d-Leu15]-orexin B), in rats. RESULTS: EMPA (100 mg/kg, ip) but not SB 334867 (3-10 mg/kg, ip) showed antagonistic effects on ADL-OXB-induced hyperlocomotion without affecting the spontaneous locomotor activity. Both EMPA (100 mg/kg, ip) and the OX1 and OX2 receptor antagonist (3-30 mg/kg, po) antagonized orexin A-induced hyperlocomotion, while SB 334867 (3‒-10 mg/kg, ip) showed no effects. CONCLUSIONS: Our results suggest that orexin A-induced hyperlocomotion is mainly mediated by the activation of the OX2 receptor.


Assuntos
Locomoção/fisiologia , Receptores de Orexina/metabolismo , Orexinas/metabolismo , Aminopiridinas/farmacologia , Animais , Benzoxazóis/farmacologia , Locomoção/efeitos dos fármacos , Masculino , Naftiridinas/farmacologia , Neuropeptídeos/metabolismo , Ratos , Ratos Sprague-Dawley , Sulfonamidas/farmacologia , Ureia/análogos & derivados , Ureia/farmacologia
5.
Gan To Kagaku Ryoho ; 46(5): 953-955, 2019 May.
Artigo em Japonês | MEDLINE | ID: mdl-31189824

RESUMO

A 73-year-old man underwent laparoscopic sigmoidectomy for sigmoid colon cancer. Two years after the operation, multiple lung metastasis was diagnosed and chemotherapy with bevacizumab, irinotecan, and TS-1®was started in the patient. However, epigastric pain developed 73 days after the initial course of chemotherapy. Abdominal CT revealed duodenal perforation and generalized peritonitis. Emergency operation with omental patch closure was immediately performed. The patient was discharged 15 days after the emergency operation without any complication. This is an extremely rare case of bevacizu- mab-related duodenal perforation.


Assuntos
Bevacizumab/efeitos adversos , Úlcera Duodenal , Perfuração Intestinal , Neoplasias do Colo Sigmoide , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica , Colo Sigmoide , Humanos , Masculino , Neoplasias do Colo Sigmoide/terapia
6.
Clin Endosc ; 52(1): 59-64, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30300983

RESUMO

BACKGROUND/AIMS: The clinical impact of single-stage endoscopic stone extraction by endoscopic retrograde cholangiopancreatography (ERCP) and cholecystectomy during the same hospitalization remains elusive. This study aimed to determine the efficacy and safety of single-stage ERCP and cholecystectomy during the same hospitalization in patients with cholangitis. METHODS: We retrospectively reviewed the medical records of 166 patients who underwent ERCP for mild to moderate cholangitis due to choledocholithiasis secondary to cholecystolithiasis from 2012 to 2016. RESULTS: Complete stone extraction was accomplished in 92% of patients (152/166) at the first ERCP. Among 152 patients who underwent complete stone extraction, cholecystectomy was scheduled for 119 patients (78%). Cholecystectomy was performed during the same hospitalization in 89% of patients (106/119). We compared two groups of patients: those who underwent cholecystectomy during the same hospitalization (n=106) and those who underwent cholecystectomy during a subsequent hospitalization (n=13). In the delayed group, cholecystectomy was performed about three months after the first ERCP. There were no significant differences between the groups in terms of operative time, rate of postoperative complications, and interval from cholecystectomy to discharge. CONCLUSION: Single-stage endoscopic stone extraction is recommended in patients with mild to moderate acute cholangitis due to choledocholithiasis. The combination of endoscopic stone extraction and cholecystectomy during the same hospitalization is safe and feasible.

7.
J Pharmacol Exp Ther ; 360(1): 59-68, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27807008

RESUMO

A suicide gene therapy using herpes simplex virus thymidine kinase (HSV-TK) with ganciclovir (GCV) has been under development as a tumor-targeted therapy; however, the mechanism of cellular GCV uptake, which is prerequisite in the therapy, has not been clarified. In an attempt to resolve this situation and gain information to optimize HSV-TK/GCV system for cancer therapy, we found that human equilibrative nucleobase transporter 1 (ENBT1) can transport GCV with a Michaelis constant of 2.75 mM in Madin-Darby canine kidney II (MDCKII) cells stably transfected with this transporter. In subsequent experiments using green fluorescent protein (GFP)-tagged ENBT1 (GFP-ENBT1) and HSV-TK, the uptake of GCV (30 µM), which was minimal in MDCKII cells and unchanged by their transfection with HSV-TK alone, was increased extensively by their transfection with GFP-ENBT1, together with HSV-TK. Accordingly, cytotoxicity, which was assessed by the WST-8 cell viability assay after the treatment of those cells with GCV (30 µM) for 72 hours, was induced in those transfected with GFP-ENBT1, together with HSV-TK but not in those transfected with HSV-TK alone. These results suggest that ENBT1 could facilitate GCV uptake and thereby enhance cytotoxicity in HSV-TK/GCV system. We also identified Helacyton gartleri (HeLa) and HepG2 as cancer cell lines that are rich with ENBT1 and A549, HCT-15 and MCF-7 as those poor with ENBT1. Accordingly, the HSV-TK/GCV system was effective in inducing cytotoxicity in the former but not in the latter. Thus, ENBT1 was found to be a GCV transporter that could enhance the performance of HSV-TK/GCV suicide gene therapy.


Assuntos
Sistemas de Transporte de Aminoácidos/metabolismo , Apoptose/genética , Ganciclovir/metabolismo , Ganciclovir/farmacologia , Terapia Genética , Simplexvirus/enzimologia , Timidina Quinase/genética , Animais , Transporte Biológico , Linhagem Celular , Cães , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Humanos , Simplexvirus/genética
8.
Gan To Kagaku Ryoho ; 43(7): 909-11, 2016 Jul.
Artigo em Japonês | MEDLINE | ID: mdl-27431640

RESUMO

A 51-year-old man underwent abdominoperineal resection for advanced rectal cancer at a hospital. He attended our outpatient clinic 58 months later with pain in the external genitalia, and was diagnosed with local pelvic recurrence and metastasis to the para-aortic lymph node and both adrenal glands. He received a total of 30 Gy of radiation for analgesia; subsequently, chemotherapy(mFOLFOX6 plus bevacizumab)was initiated. However, extreme left buttock and left femoral pain developed after the 6 courses of chemotherapy. Abdominal CT revealed Fournier's gangrene caused by small intestinal perforation. Emergency drainage under spinal anesthesia was immediately performed. Two additional drainage procedures were required thereafter and an ileostomy was constructed. The patient was discharged 100 days after the initial drainage. This is an extremely rare example of a bevacizumab-related small intestinal perforation that developed into Fournier's gan- grene.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Bevacizumab/efeitos adversos , Gangrena de Fournier/etiologia , Perfuração Intestinal/induzido quimicamente , Intestino Delgado/diagnóstico por imagem , Neoplasias Retais/terapia , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Bevacizumab/administração & dosagem , Quimiorradioterapia , Drenagem , Evolução Fatal , Fluoruracila/administração & dosagem , Humanos , Leucovorina/administração & dosagem , Masculino , Pessoa de Meia-Idade , Compostos Organoplatínicos/administração & dosagem , Neoplasias Retais/diagnóstico por imagem
10.
Sci Rep ; 5: 15057, 2015 Oct 12.
Artigo em Inglês | MEDLINE | ID: mdl-26455426

RESUMO

The purine salvage pathway plays a major role in the nucleotide production, relying on the supply of nucleobases and nucleosides from extracellular sources. Although specific transporters have been suggested to be involved in facilitating their transport across the plasma membrane in mammals, those which are specifically responsible for utilization of extracellular nucleobases remain unknown. Here we present the molecular and functional characterization of SLC43A3, an orphan transporter belonging to an amino acid transporter family, as a purine-selective nucleobase transporter. SLC43A3 was highly expressed in the liver, where it was localized to the sinusoidal membrane of hepatocytes, and the lung. In addition, SLC43A3 expressed in MDCKII cells mediated the uptake of purine nucleobases such as adenine, guanine, and hypoxanthine without requiring typical driving ions such as Na(+) and H(+), but it did not mediate the uptake of nucleosides. When SLC43A3 was expressed in APRT/HPRT1-deficient A9 cells, adenine uptake was found to be low. However, it was markedly enhanced by the introduction of SLC43A3 with APRT. In HeLa cells, knock-down of SLC43A3 markedly decreased adenine uptake. These data suggest that SLC43A3 is a facilitative and purine-selective nucleobase transporter that mediates the cellular uptake of extracellular purine nucleobases in cooperation with salvage enzymes.


Assuntos
Sistemas de Transporte de Aminoácidos/genética , Transportador Equilibrativo 1 de Nucleosídeo/genética , Purinas/metabolismo , Adenina/metabolismo , Adenina Fosforribosiltransferase/antagonistas & inibidores , Adenina Fosforribosiltransferase/genética , Adenina Fosforribosiltransferase/metabolismo , Adenosina/metabolismo , Sistemas de Transporte de Aminoácidos/antagonistas & inibidores , Sistemas de Transporte de Aminoácidos/metabolismo , Animais , Transporte Biológico , Cães , Transportador Equilibrativo 1 de Nucleosídeo/antagonistas & inibidores , Transportador Equilibrativo 1 de Nucleosídeo/metabolismo , Células HEK293 , Células HeLa , Hepatócitos/metabolismo , Humanos , Hipoxantina/metabolismo , Fígado/metabolismo , Pulmão/metabolismo , Células Madin Darby de Rim Canino , Camundongos , Isoformas de Proteínas/antagonistas & inibidores , Isoformas de Proteínas/genética , Isoformas de Proteínas/metabolismo , RNA Interferente Pequeno/genética , RNA Interferente Pequeno/metabolismo , Timidina/metabolismo , Uridina/metabolismo
11.
Jpn J Clin Oncol ; 45(3): 286-90, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25489005

RESUMO

Recently, bevacizumab has become a key drug for treatment of metastatic colorectal cancer. Molecularly targeted agents such as bevacizumab can cause life-threatening adverse effects, though they are generally considered less toxic than cytotoxic drugs. Here, we review the case of a 76-year-old male rectal cancer patient with liver metastasis who suffered extensive bowel necrosis after administration of 5-fluorouracil-based chemotherapy with bevacizumab, and required a subtotal colectomy and end-ileostomy. Microscopic findings revealed extensive mucosal necrosis in the resected colon specimen and necrosis at the muscularis propria of the descending colon. Pathological findings suggested that the mucosal damage induced by chemotherapy may be exacerbated by treatment with bevacizumab, resulting in extensive necrosis.


Assuntos
Inibidores da Angiogênese/efeitos adversos , Anticorpos Monoclonais Humanizados/efeitos adversos , Colo/patologia , Neoplasias Retais/tratamento farmacológico , Idoso , Anticorpos Monoclonais Humanizados/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Bevacizumab , Colectomia/métodos , Evolução Fatal , Fluoruracila/administração & dosagem , Humanos , Ileostomia/métodos , Leucovorina/administração & dosagem , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/secundário , Masculino , Necrose/induzido quimicamente , Necrose/cirurgia , Compostos Organoplatínicos/administração & dosagem , Neoplasias Retais/patologia
12.
Int Surg ; 99(3): 230-4, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24833144

RESUMO

The ileosigmoid knot (ISK) is a rare cause of intestinal obstruction. ISK is a condition in which the ileum wraps around the base of the sigmoid colon and forms a knot, leading to high mortality with rapid progression to bowel gangrene. We herein report a rare case of ISK at week 13 of pregnancy. The ISK was diagnosed by computed tomography, and the patient underwent emergency surgery for acute abdomen. Laparotomy showed segmental gangrenous change in the sigmoid colon, which was twisted around the distal ileal loop. The gangrenous bowel was resected, and primary anastomosis was performed. To our knowledge, the present case involves the first and earliest pregnancy in which a preoperative diagnosis of ISK was made and successful treatment was performed with surgery. A radiologic approach should be undertaken for prompt diagnosis and optimal management, even in early pregnancy.


Assuntos
Doenças do Íleo/cirurgia , Obstrução Intestinal/etiologia , Complicações na Gravidez/cirurgia , Doenças do Colo Sigmoide/cirurgia , Abdome Agudo/etiologia , Abdome Agudo/cirurgia , Adulto , Anastomose Cirúrgica , Feminino , Humanos , Doenças do Íleo/complicações , Doenças do Íleo/diagnóstico por imagem , Obstrução Intestinal/diagnóstico por imagem , Obstrução Intestinal/cirurgia , Gravidez , Complicações na Gravidez/diagnóstico por imagem , Doenças do Colo Sigmoide/complicações , Doenças do Colo Sigmoide/diagnóstico por imagem , Tomografia Computadorizada por Raios X
13.
World J Surg Oncol ; 11: 289, 2013 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-24209713

RESUMO

Metastatic pancreatic cancer is rare, accounting for approximately 2% of all pancreatic malignancies, and most cases arise from renal cell carcinoma. We report the case of a 63-year-old woman, who presented with a pancreatic tumor detected during her annual health examination. She had undergone left nephrectomy 13 years previously for renal cell carcinoma. Computed tomography (CT) revealed two tumors in the head and body of the pancreas, a hypervascular tumor and a hypovascular tumor with an enhanced rim, respectively. She underwent pylorus-preserving pancreaticoduodenectomy, and metastatic pancreatic tumors arising from the kidney with clustered clear cell carcinoma immunohistochemically positive for CD10 were diagnosed. This report presents the different enhancement features of different lesions on CT scans. Because the enhancement features of lesions have been reported to vary according to the size of the metastatic tumor, a knowledge of the history of renal cell carcinoma is crucial for diagnosis.


Assuntos
Carcinoma de Células Renais/patologia , Neoplasias Renais/patologia , Nefrectomia/efeitos adversos , Neoplasias Pancreáticas/secundário , Carcinoma de Células Renais/diagnóstico por imagem , Carcinoma de Células Renais/cirurgia , Feminino , Humanos , Neoplasias Renais/diagnóstico por imagem , Neoplasias Renais/cirurgia , Pessoa de Meia-Idade , Pancreatectomia , Neoplasias Pancreáticas/diagnóstico por imagem , Neoplasias Pancreáticas/cirurgia , Complicações Pós-Operatórias , Prognóstico , Literatura de Revisão como Assunto , Tomografia Computadorizada por Raios X
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...