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1.
Med Trop Sante Int ; 4(1)2024 Mar 31.
Artigo em Francês | MEDLINE | ID: mdl-38846121

RESUMO

Accidental ingestion of a foreign body into the gastrointestinal tract is not uncommon, however the development of hepatic abscesses secondary to digestive perforation by a foreign body is rare. We report the case of pyogenic hepatic abscesses secondary to gastric perforation by a fishbone complicated by acute peritonitis. A 53-year-old patient was admitted to our hospital with the main complaints: diffuse abdominal pain with vomiting in a context of fever and physical asthenia. A painful febrile hepatomegaly with jaundice was objectified, as well as a non-specific biological inflammatory syndrome. An initial abdominopelvic CT scan revealed multifocal liver abscesses. Faced with the initial therapeutic failure associating parenteral antibiotic therapy and abscess drainage, a second abdominal CT scan identified a foreign body straddling the antropyloric wall and segment I of the liver.A xypho-pelvic midline laparotomy was performed with nearly 200 cc of peritoneal fluid coming out. A fishbone approximately 5 cm long was extracted by laparotomy, followed by gastric closure with omentum, peritoneal cleansing and drainage. Symptomatic adjuvant treatment was initiated, including a proton pump inhibitor (Pantoprazole). He also benefited from transfusion support in the face of anemia. Antibiotic therapy was continued for a total of 2 weeks after surgery. The evolution was favorable with follow-up imaging at 3 months, showing complete resorption of the hepatic abscesses.


Assuntos
Corpos Estranhos , Abscesso Hepático Piogênico , Peritonite , Humanos , Pessoa de Meia-Idade , Peritonite/etiologia , Masculino , Abscesso Hepático Piogênico/terapia , Corpos Estranhos/complicações , Corpos Estranhos/cirurgia , Doença Aguda , Senegal , Estômago/lesões , Estômago/diagnóstico por imagem
2.
Rev. esp. patol ; 57(2): 151-155, Abr-Jun, 2024. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-232423

RESUMO

Adenocarcinoma with enteroblastic differentiation is a rare histologic subtype of adenocarcinoma of the gastrointestinal tract that shows unique histologic and immunohistochemical features that resemble fetal intestinal epithelium. This histological subtype has been widely described in the stomach, where it most frequently appears, but, in other locations, it is misdiagnosed because of the poor experience in routine diagnostic setting. Here we present a case of an 87-year-old male with an adenocarcinoma of the ampulla of Vater with enteroblastic differentiation with a literature review of the cases described of this subtype in this location to date. The anatomical peculiarity of the ampulla, joined with the infrequent nature of this histological subtype, makes this case of great interest to aid to better characterize the biological behavior of these tumors. (AU)


El adenocarcinoma con diferenciación enteroblástica es un subtipo histológico poco frecuente de adenocarcinoma gastrointestinal que muestra características histológicas e inmunohistoquímicas únicas que se asemejan al epitelio intestinal fetal. Este subtipo histológico ha sido ampliamente descrito en el estómago, donde aparece con mayor frecuencia, pero en otras localizaciones es mal diagnosticado debido a la poca experiencia en el diagnóstico de rutina. Presentamos un caso de un varón de 87 años con adenocarcinoma de ampolla de Vater con diferenciación enteroblástica, junto a una revisión bibliográfica de los casos descritos de este subtipo en esta localización hasta el momento. La peculiaridad anatómica de la ampolla, sumada al carácter poco frecuente de este subtipo histológico, dotan a este caso de gran interés para ayudar a caracterizar mejor el comportamiento biológico de estos tumores. (AU)


Assuntos
Humanos , Adenocarcinoma , Ampola Hepatopancreática , Coloração e Rotulagem , Trato Gastrointestinal , Estômago
3.
PLoS One ; 19(5): e0302522, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38758940

RESUMO

Paddlefish has high economic and ecological value. In this study, microbial diversity and community structure in intestine, stomach, and mouth of paddlefish were detected using high-throughput sequencing. The results showed that the diversity and richness indices decreased along the digestive tract, and significantly lower proportion of those were observed in intestine. Firmicutes, Bacteroidetes and Proteobacteria were the dominant phyla. In top 10 phyla, there was no significant difference in mouth and stomach. But compared with intestine, there were significant differences in 8 of the 10 phyla, and Firmicutes and Bacteroidetes increased significantly, while Proteobacteria decreased significantly. There was no dominant genus in mouth and stomach, but Clostridium_sensu_stricto_1 and uncultured_bacterium_o_Bacteroidales was predominant in intestine. In conclusion, the species and abundance of microbiota in the mouth and stomach of paddlefish were mostly the same, but significantly different from those in intestine. Moreover, there was enrichment of the dominant bacteria in intestine.


Assuntos
Peixes , Microbioma Gastrointestinal , Animais , Peixes/microbiologia , Trato Gastrointestinal/microbiologia , Bactérias/classificação , Bactérias/genética , Bactérias/isolamento & purificação , Boca/microbiologia , Estômago/microbiologia , Proteobactérias/isolamento & purificação , Proteobactérias/genética , Sequenciamento de Nucleotídeos em Larga Escala , Intestinos/microbiologia , Bacteroidetes/isolamento & purificação , Bacteroidetes/genética , Firmicutes/isolamento & purificação , Firmicutes/genética , Firmicutes/classificação , RNA Ribossômico 16S/genética , Biodiversidade
4.
J Transl Med ; 22(1): 468, 2024 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-38760813

RESUMO

BACKGROUND: Gastric intestinal metaplasia (GIM) is an essential precancerous lesion. Although the reversal of GIM is challenging, it potentially brings a state-to-art strategy for gastric cancer therapeutics (GC). The lack of the appropriate in vitro model limits studies of GIM pathogenesis, which is the issue this work aims to address for further studies. METHOD: The air-liquid interface (ALI) model was adopted for the long-term culture of GIM cells in the present work. This study conducted Immunofluorescence (IF), quantitative real-time polymerase chain reaction (qRT-PCR), transcriptomic sequencing, and mucoproteomic sequencing (MS) techniques to identify the pathways for differential expressed genes (DEGs) enrichment among different groups, furthermore, to verify novel biomarkers of GIM cells. RESULT: Our study suggests that GIM-ALI model is analog to the innate GIM cells, which thus can be used for mucus collection and drug screening. We found genes MUC17, CDA, TRIM15, TBX3, FLVCR2, ONECUT2, ACY3, NMUR2, and MAL2 were highly expressed in GIM cells, while GLDN, SLC5A5, MAL, and MALAT1 showed down-regulated, which can be used as potential biomarkers for GIM cells. In parallel, these genes that highly expressed in GIM samples were mainly involved in cancer-related pathways, such as the MAPK signal pathway and oxidative phosphorylation signal pathway. CONCLUSION: The ALI model is validated for the first time for the in vitro study of GIM. GIM-ALI model is a novel in vitro model that can mimic the tissue micro-environment in GIM patients and further provide an avenue for studying the characteristics of GIM mucus. Our study identified new markers of GIM as well as pathways associated with GIM, which provides outstanding insight for exploring GIM pathogenesis and potentially other related conditions.


Assuntos
Metaplasia , Humanos , Ar , Modelos Biológicos , Mucosa Gástrica/patologia , Mucosa Gástrica/metabolismo , Estômago/patologia , Organoides/patologia , Neoplasias Gástricas/patologia , Neoplasias Gástricas/genética , Regulação Neoplásica da Expressão Gênica , Transcriptoma/genética , Intestinos/patologia
5.
PLoS One ; 19(5): e0302880, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38718092

RESUMO

Gastrointestinal (GI) cancer is leading general tumour in the Gastrointestinal tract, which is fourth significant reason of tumour death in men and women. The common cure for GI cancer is radiation treatment, which contains directing a high-energy X-ray beam onto the tumor while avoiding healthy organs. To provide high dosages of X-rays, a system needs for accurately segmenting the GI tract organs. The study presents a UMobileNetV2 model for semantic segmentation of small and large intestine and stomach in MRI images of the GI tract. The model uses MobileNetV2 as an encoder in the contraction path and UNet layers as a decoder in the expansion path. The UW-Madison database, which contains MRI scans from 85 patients and 38,496 images, is used for evaluation. This automated technology has the capability to enhance the pace of cancer therapy by aiding the radio oncologist in the process of segmenting the organs of the GI tract. The UMobileNetV2 model is compared to three transfer learning models: Xception, ResNet 101, and NASNet mobile, which are used as encoders in UNet architecture. The model is analyzed using three distinct optimizers, i.e., Adam, RMS, and SGD. The UMobileNetV2 model with the combination of Adam optimizer outperforms all other transfer learning models. It obtains a dice coefficient of 0.8984, an IoU of 0.8697, and a validation loss of 0.1310, proving its ability to reliably segment the stomach and intestines in MRI images of gastrointestinal cancer patients.


Assuntos
Neoplasias Gastrointestinais , Trato Gastrointestinal , Imageamento por Ressonância Magnética , Humanos , Imageamento por Ressonância Magnética/métodos , Neoplasias Gastrointestinais/diagnóstico por imagem , Neoplasias Gastrointestinais/patologia , Trato Gastrointestinal/diagnóstico por imagem , Semântica , Processamento de Imagem Assistida por Computador/métodos , Feminino , Masculino , Estômago/diagnóstico por imagem , Estômago/patologia
6.
Artigo em Inglês | MEDLINE | ID: mdl-38728178

RESUMO

A Gram-negative, facultative anaerobic, non-motile and rod-shaped bacterium, designated 10c7w1T, was isolated from a human gastrointestinal tract. Colonies on agar plates were small, circular, smooth and beige. The optimal growth conditions were determined to be 37 °C, pH 7.0-7.5 and 0 % (w/v) NaCl. Comparative analysis of complete 16S rRNA gene sequences revealed that strain 10c7w1T showed the highest sequence similarity of 95.8 % to Ottowia beijingensis MCCC 1A01410T, followed by Ottowia thiooxydans (95.2 %) JCM 11629T. The average amino acid identity values between 10c7w1T and O. beijingensis MCCC 1A01410T and O. thiooxydans JCM 11629T were above 60 % (71.4 and 69.5 %). The average nucleotide identity values between strain 10c7w1T and O. beijingensis MCCC 1A01410T and O. thiooxydans JCM 11629T were 76.9 and 72.5 %, respectively. The dominant fatty acids (≥10 %) were straight chain ones, with summed feature 3 (C16 : 1 ω7c/C16 : 1 ω6c), summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c) and C16 : 00 being the most abundant. Q-8 was the only respiratory quinone. The major polar lipids of strain 10c7w1T were phosphatidylethanolamine, diphosphatidylglycerol and unknown lipids. The DNA G+C content of strain 10c7w1T was 63.6 mol%. On the basis of phylogenetic, phenotypic and chemotaxonomic data, strain 10c7w1T is considered to represent a novel species within the genus Ottowia, for which the name Ottowia cancrivicina sp. nov. is proposed. The type strain is 10c7w1T (=MCCC 1H01399T=KCTC 92200T).


Assuntos
Técnicas de Tipagem Bacteriana , Composição de Bases , DNA Bacteriano , Ácidos Graxos , Filogenia , RNA Ribossômico 16S , Análise de Sequência de DNA , Estômago , RNA Ribossômico 16S/genética , Ácidos Graxos/química , Humanos , DNA Bacteriano/genética , Estômago/microbiologia , Hibridização de Ácido Nucleico , Ubiquinona , Fosfolipídeos/química
7.
Pediatr Surg Int ; 40(1): 131, 2024 May 10.
Artigo em Inglês | MEDLINE | ID: mdl-38730091

RESUMO

PURPOSE: To evaluate the urodynamic changes in patients who have undergone colocystoplasty (CCP), gastrocystoplasty (GCP) and ileocystoplasty (ICP) in a retrospective study. Changes in urinary continence, incidence of pathologic contractions before and after augmentation, alterations of urodynamic parameters were also examined. METHODS: Eighty-four patients were included in the study who underwent bladder augmentation between 1987 and 2017. Group I: 35 patients with CCP. Group II: 18 patients with GCP. Group III: 31 patients with ICP. Cystometry was performed at 3, 6, and every 12 months, then biannually after augmentation. Pre- and postoperative urodynamic changes were analysed statistically. RESULTS: In Group I, two patients and in Group III, one patient remained incontinent after CCP and ICP. Bladder capacity increased significantly, maximal intra-vesical pressure decreased and compliance improved in all groups (p < 0.001). Postoperative studies showed pathologic contractions in the augmented bladder in half of the patients with GCP, in 43% of patients after CCP and 26% of patients with ICP. CONCLUSION: From the urodynamic point of view, ileum is the most adequate option in the long term. Contractions after augmentation might be caused by the remaining peristalsis of the detubularised segment. Further investigations are needed to evaluate pathologic contractions that remained after detubularisation.


Assuntos
Íleo , Bexiga Urinária , Urodinâmica , Humanos , Estudos Retrospectivos , Feminino , Masculino , Bexiga Urinária/fisiopatologia , Bexiga Urinária/cirurgia , Criança , Íleo/cirurgia , Íleo/fisiopatologia , Adolescente , Colo/cirurgia , Colo/fisiopatologia , Pré-Escolar , Estômago/cirurgia , Estômago/fisiopatologia , Procedimentos Cirúrgicos Urológicos/métodos , Lactente
8.
World J Gastroenterol ; 30(16): 2281-2284, 2024 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-38690016

RESUMO

The following are our views regarding the "letter to the editor" (Helicobacter is preserved in yeast vacuoles! Does Koch's postulates confirm it?) by Alipour and Gaeini, and the response "letter to the editor" (Candida accommodates non-culturable Helicobacter pylori in its vacuole-Koch's postulates aren't applicable) by Siavoshi and Saniee. Alipour and Gaeini rejected the methods, results, discussion, and conclusions summarized in a review article by Siavoshi and Saniee. The present article reviews and discusses evidence on the evolutionary adaptation of Helicobacter pylori (H. pylori) to thrive in Candida cell vacuoles and concludes that Candida could act as a Trojan horse, transporting potentially infectious H. pylori into the stomach of humans.


Assuntos
Infecções por Helicobacter , Helicobacter pylori , Helicobacter pylori/patogenicidade , Humanos , Infecções por Helicobacter/microbiologia , Candida/fisiologia , Candida/crescimento & desenvolvimento , Candida/patogenicidade , Vacúolos/microbiologia , Vacúolos/metabolismo , Estômago/microbiologia , Mucosa Gástrica/microbiologia
9.
Pediatr Surg Int ; 40(1): 121, 2024 May 04.
Artigo em Inglês | MEDLINE | ID: mdl-38703237

RESUMO

PURPOSE: Rapunzel syndrome is an uncommon condition in children, and its clinical features remain unclear. This study presents the largest single-center series of pediatric cases to date, with the objective of documenting the clinical characteristics and treatment approaches for children with Rapunzel syndrome. METHODS: A retrospective study was conducted in children with Rapunzel syndrome from 2019 to 2023. We recorded age, gender, symptoms, locations of bezoar, complications, and treatment options. RESULTS: Ten patients with Rapunzel syndrome were included. The median age was 9.1 years, with all of whom were female. The most common clinical symptoms were upper abdominal mass (90%), abdominal pain (80%), and nausea and vomiting (50%). Complications occurred in six cases (60%), including small bowel obstruction (20%), severe gastric dilatation (10%), intestinal perforation (10%), choledochodilation (10%), acute pancreatitis with cholecystitis (10%). Preoperative ultrasonography suggested low-echoic foreign bodies continuing to the jejunum or ileocecal region in five cases (50%). Preoperative gastroscopy attempted in four cases (40%) to remove the foreign bodies, all of which failed. All patients underwent surgical treatment, with nine cases undergoing gastric incision foreign body removal, and one case undergoing gastric incision foreign body removal combined with intestinal perforation repair. All patients recovered well. No recurrence was observed during follow-up. CONCLUSION: The accuracy of ultrasound diagnosis in identifying Rapunzel syndrome is high; however, it may lead to misdiagnosis if not complemented with the patient's medical history. Endoscopic presents a heightened treatment risk and a reduced success rate. The condition commonly presents with severe complications, thus making laparotomy a safe and effective option for intervention.


Assuntos
Bezoares , Centros de Atenção Terciária , Humanos , Estudos Retrospectivos , Bezoares/cirurgia , Bezoares/complicações , Bezoares/diagnóstico , Bezoares/diagnóstico por imagem , Criança , Feminino , Pré-Escolar , Adolescente , Estômago/cirurgia , Estômago/diagnóstico por imagem , Masculino , Síndrome
11.
Sci Rep ; 14(1): 12066, 2024 05 27.
Artigo em Inglês | MEDLINE | ID: mdl-38802465

RESUMO

Heterogeneity of Helicobacter pylori communities contributes to its pathogenicity and diverse clinical outcomes. We conducted drug-susceptibility tests using four antibiotics, clarithromycin (CLR), amoxicillin (AMX), metronidazole and sitafloxacin, to examine H. pylori population diversity. We also analyzed genes associated with resistance to CLR and AMX. We examined multiple isolates from 42 Japanese patients, including 28 patients in whom primary eradication with CLR and AMX had failed, and 14 treatment-naïve patients. We identified some patients with coexistence of drug resistant- and sensitive-isolates (drug-heteroR/S-patients). More than 60% of patients were drug-heteroR/S to all four drugs, indicating extensive heterogeneity. For the four drugs except AMX, the rates of drug-heteroR/S-patients were higher in treatment-naïve patients than in primary eradication-failure patients. In primary eradication-failure patients, isolates multi-resistant to all four drugs existed among other isolates. In primary eradication-failure drug-heteroR/S-patients, CLR- and AMX-resistant isolates were preferentially distributed to the corpus and antrum with different minimum inhibitory concentrations, respectively. We found two mutations in PBP1A, G591K and A480V, and analyzed these in recombinants to directly demonstrate their association with AMX resistance. Assessment of multiple isolates from different stomach regions will improve accurate assessment of H. pylori colonization status in the stomach.


Assuntos
Amoxicilina , Antibacterianos , Farmacorresistência Bacteriana , Infecções por Helicobacter , Helicobacter pylori , Testes de Sensibilidade Microbiana , Mutação , Humanos , Helicobacter pylori/genética , Helicobacter pylori/efeitos dos fármacos , Helicobacter pylori/isolamento & purificação , Infecções por Helicobacter/microbiologia , Infecções por Helicobacter/tratamento farmacológico , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Farmacorresistência Bacteriana/genética , Amoxicilina/farmacologia , Amoxicilina/uso terapêutico , Masculino , Feminino , Metronidazol/farmacologia , Estômago/microbiologia , Claritromicina/farmacologia , Pessoa de Meia-Idade , Idoso , Adulto , Proteínas de Bactérias/genética , Proteínas de Ligação às Penicilinas/genética , Fluoroquinolonas/farmacologia , Fluoroquinolonas/uso terapêutico
12.
PLoS One ; 19(5): e0303421, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38743709

RESUMO

BACKGROUND AND AIMS: Gastric intestinal metaplasia is a precancerous disease, and a timely diagnosis is essential to delay or halt cancer progression. Artificial intelligence (AI) has found widespread application in the field of disease diagnosis. This study aimed to conduct a comprehensive evaluation of AI's diagnostic accuracy in detecting gastric intestinal metaplasia in endoscopy, compare it to endoscopists' ability, and explore the main factors affecting AI's performance. METHODS: The study followed the PRISMA-DTA guidelines, and the PubMed, Embase, Web of Science, Cochrane, and IEEE Xplore databases were searched to include relevant studies published by October 2023. We extracted the key features and experimental data of each study and combined the sensitivity and specificity metrics by meta-analysis. We then compared the diagnostic ability of the AI versus the endoscopists using the same test data. RESULTS: Twelve studies with 11,173 patients were included, demonstrating AI models' efficacy in diagnosing gastric intestinal metaplasia. The meta-analysis yielded a pooled sensitivity of 94% (95% confidence interval: 0.92-0.96) and specificity of 93% (95% confidence interval: 0.89-0.95). The combined area under the receiver operating characteristics curve was 0.97. The results of meta-regression and subgroup analysis showed that factors such as study design, endoscopy type, number of training images, and algorithm had a significant effect on the diagnostic performance of AI. The AI exhibited a higher diagnostic capacity than endoscopists (sensitivity: 95% vs. 79%). CONCLUSIONS: AI-aided diagnosis of gastric intestinal metaplasia using endoscopy showed high performance and clinical diagnostic value. However, further prospective studies are required to validate these findings.


Assuntos
Inteligência Artificial , Metaplasia , Humanos , Metaplasia/diagnóstico , Metaplasia/patologia , Neoplasias Gástricas/diagnóstico , Neoplasias Gástricas/patologia , Sensibilidade e Especificidade , Lesões Pré-Cancerosas/diagnóstico , Lesões Pré-Cancerosas/patologia , Curva ROC , Estômago/patologia
13.
Int J Mol Sci ; 25(10)2024 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-38791299

RESUMO

Type 1 diabetes (T1D) affects gastrointestinal (GI) motility, favoring gastroparesis, constipation, and fecal incontinence, which are more prevalent in women. The mechanisms are unknown. Given the G-protein-coupled estrogen receptor's (GPER) role in GI motility, we investigated sex-related diabetes-induced epigenetic changes in GPER. We assessed GPER mRNA and protein expression levels using qPCR and Western blot analyses, and quantified the changes in nuclear DNA methyltransferases and histone modifications (H3K4me3, H3Ac, and H3K27Ac) by ELISA kits. Targeted bisulfite and chromatin immunoprecipitation assays were used to evaluate DNA methylation and histone modifications around the GPER promoter by chromatin immunoprecipitation assays in gastric and colonic smooth muscle tissues of male and female control (CTR) and non-obese diabetic (NOD) mice. GPER expression was downregulated in NOD, with sex-dependent variations. In the gastric smooth muscle, not in colonic smooth muscle, downregulation coincided with differences in methylation ratios between regions 1 and 2 of the GPER promoter of NOD. DNA methylation was higher in NOD male colonic smooth muscle than in NOD females. H3K4me3 and H3ac enrichment decreased in NOD gastric smooth muscle. H3K4me3 levels diminished in the colonic smooth muscle of NOD. H3K27ac levels were unaffected, but enrichment decreased in NOD male gastric smooth muscle; however, it increased in the NOD male colonic smooth muscle and decreased in the female NOD colonic smooth muscle. Male NOD colonic smooth muscle exhibited decreased H3K27ac levels, not female, whereas female NOD colonic smooth muscle demonstrated diminished enrichment of H3ac at the GPER promoter, contrary to male NOD. Sex-specific epigenetic mechanisms contribute to T1D-mediated suppression of GPER expression in the GI tract. These insights advance our understanding of T1D complications and suggest promising avenues for targeted therapeutic interventions.


Assuntos
Colo , Metilação de DNA , Epigênese Genética , Histonas , Camundongos Endogâmicos NOD , Músculo Liso , Regiões Promotoras Genéticas , Receptores Acoplados a Proteínas G , Animais , Feminino , Masculino , Receptores Acoplados a Proteínas G/genética , Receptores Acoplados a Proteínas G/metabolismo , Músculo Liso/metabolismo , Camundongos , Histonas/metabolismo , Colo/metabolismo , Colo/patologia , Diabetes Mellitus Tipo 1/metabolismo , Diabetes Mellitus Tipo 1/genética , Receptores de Estrogênio/metabolismo , Receptores de Estrogênio/genética , Estômago/patologia
14.
Sci Rep ; 14(1): 10602, 2024 05 08.
Artigo em Inglês | MEDLINE | ID: mdl-38719935

RESUMO

Although the application of magnetic compression anastomosis is becoming increasingly widespread, the magnets used in earlier studies were mostly in the shape of a whole ring. Hence, a deformable self-assembled magnetic anastomosis ring (DSAMAR) was designed in this study for gastrointestinal anastomosis. Furthermore, its feasibility was studied using a beagle model. The designed DSAMAR comprised 10 trapezoidal magnetic units. Twelve beagles were used as animal models, and DSAMARs were inserted into the stomach and colon through the mouth and anus, respectively, via endoscopy to achieve gastrocolic magnamosis. Surgical time, number of failed deformations, survival rate of the animals, and the time of magnet discharge were documented. A month later, specimens of the anastomosis were obtained and observed with the naked eye as well as microscopically. In the gastrocolic anastomosis of the 12 beagles, the procedure took 65-120 min. Although a deformation failure occurred during the operation in one of the beagles, it was successful after repositioning. The anastomosis was formed after the magnet fell off 12-18 days after the operation. Naked eye and microscopic observations revealed that the anastomotic specimens obtained 1 month later were well-formed, smooth, and flat. DSAMAR is thus feasible for gastrointestinal anastomosis under full endoscopy via the natural orifice.


Assuntos
Anastomose Cirúrgica , Estudos de Viabilidade , Animais , Cães , Anastomose Cirúrgica/métodos , Estômago/cirurgia , Imãs , Magnetismo , Cirurgia Endoscópica por Orifício Natural/métodos , Cirurgia Endoscópica por Orifício Natural/instrumentação , Colo/cirurgia , Masculino
15.
Sci Rep ; 14(1): 10055, 2024 05 02.
Artigo em Inglês | MEDLINE | ID: mdl-38698058

RESUMO

Endoscopic transgastric necrosectomy is crucial in the management of complications resulting from necrotizing pancreatitis. However, both real-time and visual-spatial information is lacking during the procedure, thereby jeopardizing a precise positioning of the endoscope. We conducted a proof-of-concept study with the aim of overcoming these technical difficulties. For this purpose, a three-dimensional (3D) phantom of a stomach and pancreatic necroses was 3D-printed based on spatial information from individual patient CT scans and subsequently integrated into a silicone torso. An electromagnetic (EM) sensor was adjusted inside the endoscope´s working channel. A software interface enabled real time visualization. The accuracy of this novel assistant system was tested ex vivo by four experienced interventional endoscopists who were supposed to reach seven targets inside the phantom in six different experimental runs of simulated endoscopic transgastric necrosectomy. Supported by endoscopic camera view combined with real-time 3D visualization, all endoscopists reached the targets with a targeting error ranging between 2.6 and 6.5 mm in a maximum of eight minutes. In summary, the EM tracking system might increase efficacy and safety of endoscopic transgastric necrosectomy at the experimental level by enhancing visualization. Yet, a broader feasibility study and further technical improvements are mandatory before aiming at implementation into clinical setting.


Assuntos
Fenômenos Eletromagnéticos , Humanos , Imagens de Fantasmas , Estômago/cirurgia , Estômago/diagnóstico por imagem , Pancreatite Necrosante Aguda/cirurgia , Pancreatite Necrosante Aguda/diagnóstico por imagem , Endoscopia/métodos , Pâncreas/cirurgia , Impressão Tridimensional , Sistemas de Navegação Cirúrgica , Imageamento Tridimensional/métodos
16.
Neurogastroenterol Motil ; 36(6): e14815, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38735698

RESUMO

OBJECTIVE: There has been recent clinical interest in the use of vagus nerve stimulation (VNS) for treating gastrointestinal disorders as an alternative to drugs or gastric electrical stimulation. However, effectiveness of burst stimulation has not been demonstrated. We investigated the ability of bursting and continuous VNS to influence gastric and pyloric activity under a range of stimulation parameters and gastric pressures. The goals of this study were to determine which parameters could optimally excite or inhibit gastric activity. MATERIALS AND METHODS: Data were collected from 21 Sprague-Dawley rats. Under urethane anesthesia, a rubber balloon was implanted into the stomach, connected to a pressure transducer and a saline infusion pump. A pressure catheter was inserted at the pyloric sphincter and a bipolar nerve cuff was implanted onto the left cervical vagus nerve. The balloon was filled to 15 cmH2O. Stimulation trials were conducted in a consistent order; the protocol was then repeated at 25 and 35 cmH2O. The nerve was then transected and stimulation repeated to investigate directionality of effects. RESULTS: Bursting stimulation at the bradycardia threshold caused significant increases in gastric contraction amplitude with entrainment to the bursting frequency. Some continuous stimulation trials could also cause increased contractions but without frequency changes. Few significant changes were observed at the pylorus, except for frequency entrainment. These effects could not be uniquely attributed to afferent or efferent activity. SIGNIFICANCE: Our findings further elucidate the effects of different VNS parameters on the stomach and pylorus and provide a basis for future studies of bursting stimulation for gastric neuromodulation.


Assuntos
Contração Muscular , Ratos Sprague-Dawley , Estômago , Estimulação do Nervo Vago , Animais , Estimulação do Nervo Vago/métodos , Ratos , Estômago/inervação , Estômago/fisiologia , Contração Muscular/fisiologia , Masculino , Motilidade Gastrointestinal/fisiologia , Nervo Vago/fisiologia , Piloro/inervação , Piloro/fisiologia , Pressão
17.
Sci Rep ; 14(1): 10060, 2024 05 02.
Artigo em Inglês | MEDLINE | ID: mdl-38698246

RESUMO

This study aimed to evaluate the safety and efficiency of hybrid endoscopic submucosal dissection (H-ESD) using a newly developed ALL IN ONE (AIO) snare. This was a matched control study in a porcine model. Five paired simulated stomach lesions 2-2.5 cm in size were removed by H-ESD using an AIO snare or conventional ESD (C-ESD) using an endoscopic knife. The outcomes of the two procedures were compared, including en-bloc resection rates, procedure times, intraprocedural bleeding volumes, muscular injuries, perforations, thicknesses of the submucosal layer in resected specimens, and stomach defects. All simulated lesions were resected en-bloc. Specimens resected by H-ESD and C-ESD were similar in size (7.68 ± 2.92 vs. 8.42 ± 2.42 cm2; P = 0.676). H-ESD required a significantly shorter procedure time (13.39 ± 3.78 vs. 25.99 ± 4.52 min; P = 0.031) and submucosal dissection time (3.99 ± 1.73 vs. 13.1 ± 4.58 min; P = 0.003) versus C-ESD; H-ESD also yielded a faster dissection speed (241.37 ± 156.84 vs. 68.56 ± 28.53 mm2/min; P = 0.042) and caused fewer intraprocedural bleeding events (0.40 ± 0.55 vs. 3.40 ± 1.95 times/per lesion; P = 0.016) than C-ESD. The thicknesses of the submucosal layer of the resected specimen (1190.98 ± 134.07 vs. 1055.90 ± 151.76 µm; P = 0.174) and the residual submucosal layer of the stomach defect (1607.94 ± 1026.74 vs. 985.98 ± 445.58 µm; P = 0.249) were similar with both procedures. The AIO snare is a safe and effective device for H-ESD and improves the treatment outcomes of gastric lesions by shortening the procedure time.


Assuntos
Ressecção Endoscópica de Mucosa , Mucosa Gástrica , Animais , Ressecção Endoscópica de Mucosa/métodos , Ressecção Endoscópica de Mucosa/efeitos adversos , Ressecção Endoscópica de Mucosa/instrumentação , Suínos , Mucosa Gástrica/cirurgia , Gastroscopia/métodos , Duração da Cirurgia , Neoplasias Gástricas/cirurgia , Neoplasias Gástricas/patologia , Estômago/cirurgia , Modelos Animais
18.
Eur J Pharm Biopharm ; 199: 114313, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38718842

RESUMO

The aim of the present study was to investigate the gastroretentive capacity of different formulation principles. This was indirectly determined by the absorption behavior of caffeine from the dosage forms. A slow and continuous appearance of caffeine in the saliva of healthy volunteers was used as a parameter for a prolonged gastric retention time. For this purpose, a four-way study was conducted with twelve healthy volunteers using the following test procedures: (1) Effervescent granules with 240 mL of still water administered in fed state, (2) effervescent granules with 20 mL of still water in fed state, (3) extended release (ER) tablet with 240 mL of still water in fed state, and (4) effervescent granules with 240 mL of still water in fasted state. The initial rise of the caffeine concentrations was more pronounced after the intake of the effervescent granules in the fed state compared to that of the ER tablets. However, tmax tended to be shorter in the fed study arms following administration of the ER tablet compared to the granules. Overall, the application of active pharmaceutical ingredients formulated as effervescent granules seems to be a promising approach to increase their gastric residence time after intake in fed state.


Assuntos
Cafeína , Preparações de Ação Retardada , Comprimidos , Humanos , Cafeína/administração & dosagem , Cafeína/farmacocinética , Preparações de Ação Retardada/farmacocinética , Preparações de Ação Retardada/administração & dosagem , Masculino , Adulto , Adulto Jovem , Feminino , Jejum , Administração Oral , Saliva/metabolismo , Saliva/química , Voluntários Saudáveis , Mucosa Gástrica/metabolismo , Estudos Cross-Over , Estômago/efeitos dos fármacos
19.
Food Funct ; 15(10): 5613-5626, 2024 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-38722062

RESUMO

Modification of dairy proteins during processing impacts structural assemblies, influencing textural and nutritional properties of dairy products, and release and availability of amino acids during digestion. By modifying only pH, acid heat-set bovine dairy gels with divergent textural properties were developed to alter protein digestion. In vitro assay confirmed faster digestion of protein from a firm gel (pH 5.65) versus a soft gel (pH 6.55). We hypothesised that firm gel (FIRM-G; pH 5.6) would result in greater indispensable amino acid (IAA) appearance in circulation over 5 h and corresponding differences in gastric myoelectrical activity relative to soft gel (SOFT-G; pH 6.2). In a randomised, single-blind cross-over trial, healthy females (n = 20) consumed 150 g of each gel; plasma amino acid appearance was assessed over 5 hours. Iso-nitrogenous, iso-caloric gels were prepared from identical mixtures of bovine milk and whey protein concentrates; providing 17.7 g (FIRM-G) and 18.9 g (SOFT-G) of protein per serving. Secondary outcomes included gastric myoelectrical activity measured by body surface gastric mapping, glycaemic, triglyceridaemic, and subjective appetite and digestive responses. Overall plasma IAA (area under the curve) did not differ between gels. However, plasma IAA concentrations were higher, and increased more rapidly over time after SOFT-G compared with FIRM-G (1455 ± 53 versus 1350 ± 62 µmol L-1 at 30 min, p = 0.024). Similarly, total, branched-chain and dispensable amino acids were higher at 30 min with SOFT-G than FIRM-G (total: 3939 ± 97 versus 3702 ± 127 µmol L-1, p = 0.014; branched-chain: 677 ± 30 versus 619 ± 34 µmol L-1, p = 0.047; dispensable: 2334 ± 53 versus 2210 ± 76 µmol L-1, p = 0.032). All other measured parameters were similar between gels. Peak postprandial aminoacidaemia was higher and faster following ingestion of SOFT-G. Customised plasma amino acid appearance from dairy is achievable by altering gel coagulum structure using pH during processing and may have minimal influence on related postprandial responses, with implications for targeting food design for optimal health. The Clinical Trial Registry number is ACTRN12622001418763 (https://www.anzctr.org.au) registered November 7, 2022.


Assuntos
Aminoácidos , Estudos Cross-Over , Géis , Feminino , Humanos , Adulto , Concentração de Íons de Hidrogênio , Aminoácidos/sangue , Aminoácidos/química , Géis/química , Animais , Adulto Jovem , Bovinos , Digestão , Temperatura Alta , Proteínas do Leite/química , Método Simples-Cego , Estômago/fisiologia , Estômago/química , Leite/química
20.
Surgery ; 176(1): 93-99, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38719700

RESUMO

BACKGROUND: Anastomotic leak is a serious complication after esophagectomy that has been associated with worse outcomes. However, identifying patients at increased risk for anastomotic leak remains challenging. METHODS: Patients were included from the 2016 to 2021 National Surgical Quality Improvement Project database who underwent elective esophagectomy with gastric reconstruction for cancer. A multivariable logistic regression model was used to identify risk factors associated with anastomotic leak. RESULTS: A total of 4,331 patients were included in the study, of whom 647 patients experienced anastomotic leak (14.9%). Multivariable logistic regression revealed higher odds of anastomotic leak with smoking (adjusted odds ratio 1.24, confidence interval 1.02-1.51, P = .031), modified frailty index-5 score of 1 (adjusted odds ratio 1.44, confidence interval 1.19-1.75, P = .002) or 2 (adjusted odds ratio 1.52, confidence interval 1.19-1.94, P = .000), and a McKeown esophagectomy (adjusted odds ratio 1.44, confidence interval 1.16-1.80, P = .001). Each 1,000/µL increase in white blood cell count was associated with a 7% increase in odds of anastomotic leak (adjusted odds ratio 1.07, confidence interval 1.03-1.10, P = .0005). Higher platelet counts were slightly protective, and each 10,000/ µL increase in platelet count was associated with 2% reduced odds of anastomotic leak (adjusted odds ratio 0.98, confidence interval 0.97-0.99, P = .001). CONCLUSION: In this study, smoking status, frailty index, white blood cell count, McKeown esophagectomy, and platelet counts were all associated with the occurrence of anastomotic leak. These results can help to inform surgeons and patients of the true risk of developing anastomotic leak and potentially improve outcomes by providing evidence to improve preoperative characteristics, such as frailty.


Assuntos
Fístula Anastomótica , Bases de Dados Factuais , Neoplasias Esofágicas , Esofagectomia , Melhoria de Qualidade , Humanos , Esofagectomia/efeitos adversos , Fístula Anastomótica/etiologia , Fístula Anastomótica/epidemiologia , Feminino , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Idoso , Neoplasias Esofágicas/cirurgia , Estudos Retrospectivos , Procedimentos de Cirurgia Plástica/efeitos adversos , Estômago/cirurgia , Estados Unidos/epidemiologia , Modelos Logísticos , Medição de Risco/métodos
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