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Digestive Diseases (Basel, Switzerland) Jun 2024In the post-Helicobacter pylori era, autoimmune gastritis (AIG) is attracting increasing attention as an origin of gastric cancer. Here, we performed clinicopathological...
INTRODUCTION
In the post-Helicobacter pylori era, autoimmune gastritis (AIG) is attracting increasing attention as an origin of gastric cancer. Here, we performed clinicopathological examination of gastric cancer complicating AIG treated in our hospital.
METHODS
Eighty-six early gastric cancer lesions complicating AIG in 50 patients were treated by endoscopic submucosal dissection (ESD) at our hospital in 2008-2022. Their clinicopathological characteristics were compared with those of a control group comprising 2,978 early gastric cancer lesions (excluding lesions in the remnant stomach after surgery) in 2,278 patients treated by ESD during the same period.
RESULTS
Mean age was significantly higher in the AIG group than in the control group (74.7 years vs. 70.9 years; p < 0.01). In the respective groups, the occurrence rate of synchronous/metachronous lesions was 38.0% and 20.4% (p < 0.01), the ratio of longitudinal cancer locations (upper/middle/lower third [U/M/L]) was 27/32/27 and 518/993/1,467 (p < 0.01), the ratio of circumferential cancer locations (lesser curvature/greater curvature/anterior wall/posterior wall) was 25/31/12/18 and 1,259/587/475/657 (p < 0.01), the ratio of major macroscopic types (I/IIa/IIb/IIc) was 13/38/5/30 and 65/881/220/1,812 (p < 0.01). The rates of multiple gastric cancer and cancers in the U region, at the greater curvature, and of protruding types were significantly higher in the AIG group.
CONCLUSION
The occurrence rate of multiple gastric cancer was significantly higher in gastric cancer complicating AIG (approximately 40%), and compared with the control group, the proportions of cancers at the U region, at the greater curvature, and of protruding types were significantly higher.
PubMed: 38834042
DOI: 10.1159/000539639 -
European Journal of Gastroenterology &... Jul 2024Meckel diverticulum (MD) is an important cause of gastrointestinal bleeding in children. Small bowel capsule endoscopy (SBCE) is a first-line examination method applied...
BACKGROUND
Meckel diverticulum (MD) is an important cause of gastrointestinal bleeding in children. Small bowel capsule endoscopy (SBCE) is a first-line examination method applied to patients with obscure gastrointestinal bleeding, but there are few studies on its application in children with MD. This article aims to provide evidence in favor of the auxiliary diagnosis of MD in children by analyzing its characteristics using SBCE.
METHODS
We retrospectively collected the clinical data of patients with suspected MD.
RESULTS
A total of 58 children were included in this study. All 58 children presented overt gastrointestinal bleeding (bloody stool or melena). Capsule endoscopy identified protruding lesions in 2 cases, double-lumen changes in 30 cases (all considered as MD), vascular lesions in 7 cases, intestinal mucosal inflammatory lesions in 3 cases, ulcers or erosion in 3 cases, and no obvious abnormalities in SBCE in 12 cases. Both SBCE and technetium-99 scans were performed for 24 cases, 22 of which were diagnosed MD by their combined results, giving a diagnostic coincidence rate of 91.7%. Eight cases were highly suspected as MD but were negative for the technetium-99 scan and positive for SBCE.
CONCLUSION
SBCE has high accuracy in the diagnosis of MD in children, especially when performed in combination with a technetium-99 scan, which can greatly improve the diagnostic rate of MD in children.
Topics: Humans; Meckel Diverticulum; Capsule Endoscopy; Male; Female; Retrospective Studies; Child; Child, Preschool; Gastrointestinal Hemorrhage; Adolescent; Infant; Intestine, Small; Predictive Value of Tests; Radionuclide Imaging; Radiopharmaceuticals
PubMed: 38829942
DOI: 10.1097/MEG.0000000000002783 -
Clinical Case Reports Jun 2024Vaginal cuff dehiscence post-hysterectomy is rare yet significant. Early recognition and prompt surgical intervention are crucial to prevent complications like bowel...
KEY CLINICAL MESSAGE
Vaginal cuff dehiscence post-hysterectomy is rare yet significant. Early recognition and prompt surgical intervention are crucial to prevent complications like bowel infarction. Consider second-look laparotomy in cases of uncertain bowel viability.
ABSTRACT
Vaginal cuff dehiscence (VCD) is a rare but potentially life-threatening complication following a hysterectomy characterized by the separation of the vaginal vault. This condition, which may result in vaginal evisceration (VE), presents a significant risk of pelvic contents, particularly the small bowel, protruding into the vagina. Early diagnosis and prompt surgical intervention are paramount to prevent severe complications, including bowel infarction, obstruction, and peritonitis. Although VCD and VE are rare, they require urgent surgical management to avoid adverse outcomes. We reported a case of small bowel evisceration in a woman with a history of total abdominal hysterectomy 6 months ago. VCD and VE are very rare but life-threatening complications of hysterectomy. Discussing the symptoms with patients who have multiple risk factors is crucial to avoid severe sequels following hysterectomy. Based on our experience, performing a second-look laparotomy is a reliable approach to ensure the viability of the intestinal loop. However, it will likely increase the risk of infection.
PubMed: 38827941
DOI: 10.1002/ccr3.8910 -
Frontiers in Genetics 2024Silver-Russell syndrome (SRS) is a clinically and genetically heterogeneous disorder. A retrospective analysis predicted that the live birth prevalence of SRS in Estonia...
Silver-Russell syndrome (SRS) is a clinically and genetically heterogeneous disorder. A retrospective analysis predicted that the live birth prevalence of SRS in Estonia is 1:15,886 [Yakoreva et al., Eur J Hum Genet, 2019, 27(11), 1649-1658]. The most common causative genetic mechanism in the proband is loss of paternal methylation in the imprinted control region 1 (ICR1) at 11p15.5 chromosome. A few studies suggested that inherited or loss-of-function alterations of the gene, including the whole-gene deletion and intragenic pathogenic variants, could cause a rare type of SRS. To date, less than 20 unrelated -related SRS cases have been reported, and the clinical information about these cases is limited. We report the first prenatal case of SRS with 8q12 deletion (including the gene). The fetus presented with intrauterine growth retardation, small for gestational age, relative macrocephaly at birth, and a protruding forehead. Unlike classical SRS cases, the fetus had micrognathia and did not show body asymmetry. We hope that the literature review in this study provides new insights into genotype-phenotype relationships of -related SRS.
PubMed: 38826801
DOI: 10.3389/fgene.2024.1387649 -
Cureus Apr 2024Caesarean scar ectopic pregnancy is the rarest form of ectopic pregnancy. Nowadays, with the rise in caesarean deliveries, along with better awareness and improvement...
Caesarean scar ectopic pregnancy is the rarest form of ectopic pregnancy. Nowadays, with the rise in caesarean deliveries, along with better awareness and improvement in ultrasound diagnosis, there is an increase in the number and detection of caesarean scar ectopic pregnancy. A 28-year-old female patient with one previous caesarean delivery and a spontaneous abortion at three months visited the obstetrics emergency department due to three months of amenorrhea, abdominal pain, and vaginal bleeding on and off for two days. The patient was noticed to have severe anemia. After stabilizing the patient with blood transfusion, a laparotomy was performed with the presentation of hemoperitoneum and caesarean scar rupture. Fetus and soft vascular mass seen protruding from the previous scar were extracted. The caesarean scar site was repaired in layers.
PubMed: 38826599
DOI: 10.7759/cureus.59422 -
Research Square May 2024Stereocilia are unidirectional F-actin-based cylindrical protrusions on the apical surface of inner ear hair cells and function as biological mechanosensors of sound and...
Live-cell single-molecule fluorescence microscopy for protruding organelles reveals regulatory mechanisms of MYO7A-driven cargo transport in stereocilia of inner ear hair cells.
Stereocilia are unidirectional F-actin-based cylindrical protrusions on the apical surface of inner ear hair cells and function as biological mechanosensors of sound and acceleration. Development of functional stereocilia requires motor activities of unconventional myosins to transport proteins necessary for elongating the F-actin cores and to assemble the mechanoelectrical transduction (MET) channel complex. However, how each myosin localizes in stereocilia using the energy from ATP hydrolysis is only partially understood. In this study, we develop a methodology for live-cell single-molecule fluorescence microscopy of organelles protruding from the apical surface using a dual-view light-sheet microscope, diSPIM. We demonstrate that MYO7A, a component of the MET machinery, traffics as a dimer in stereocilia. Movements of MYO7A are restricted when scaffolded by the plasma membrane and F-actin as mediated by MYO7A's interacting partners. Here, we discuss the technical details of our methodology and its future applications including analyses of cargo transportation in various organelles.
PubMed: 38826223
DOI: 10.21203/rs.3.rs-4369958/v1 -
Biophysical Journal Jul 2024This study investigated the incorporation of triacylglycerol droplets in the bilayers of giant unilamellar vesicles (GUVs) using four triacylglycerols and four...
This study investigated the incorporation of triacylglycerol droplets in the bilayers of giant unilamellar vesicles (GUVs) using four triacylglycerols and four phosphatidylcholines by confocal laser scanning microscopy. The triacylglycerol droplets were incorporated between the monolayer leaflets of the GUVs. Among the spherical droplets protruding on only one side of the bilayers, the droplets bound to the outer leaflets outnumbered those bound to the inner leaflets. The more frequent droplet binding to the outer leaflet caused transbilayer asymmetry in the droplet surface density. A vesicle consisting of a single-bilayer spherical segment and a double-bilayer spherical segment was also observed. The yield of these vesicles was comparable with or higher than that of the droplet-incorporating GUVs for many of the phosphatidylcholine-triacylglycerol combinations. In a vesicle consisting of single-bilayer and double-bilayer segments, most of the triacylglycerol droplets were localized on the outermost membrane surface along the segment boundary and in the double-bilayer segment. To rationalize the formation of these vesicle structures, we propose that the transbilayer asymmetry in the droplet surface density induces spontaneous curvature of the bilayer, with the bilayer spontaneously bending away from the droplets. Energy calculations performed assuming the existence of spontaneous curvature of the bilayer corroborated the experimentally determined membrane shapes for the vesicles consisting of unilamellar and bilamellar regions.
Topics: Unilamellar Liposomes; Lipid Bilayers; Triglycerides; Phosphatidylcholines
PubMed: 38822522
DOI: 10.1016/j.bpj.2024.05.030 -
Communications Biology May 2024ATP-binding cassette transporter B6 (ABCB6), a protein essential for heme biosynthesis in mitochondria, also functions as a heavy metal efflux pump. Here, we present...
ATP-binding cassette transporter B6 (ABCB6), a protein essential for heme biosynthesis in mitochondria, also functions as a heavy metal efflux pump. Here, we present cryo-electron microscopy structures of human ABCB6 bound to a cadmium Cd(II) ion in the presence of antioxidant thiol peptides glutathione (GSH) and phytochelatin 2 (PC2) at resolutions of 3.2 and 3.1 Å, respectively. The overall folding of the two structures resembles the inward-facing apo state but with less separation between the two halves of the transporter. Two GSH molecules are symmetrically bound to the Cd(II) ion in a bent conformation, with the central cysteine protruding towards the metal. The N-terminal glutamate and C-terminal glycine of GSH do not directly interact with Cd(II) but contribute to neutralizing positive charges of the binding cavity by forming hydrogen bonds and van der Waals interactions with nearby residues. In the presence of PC2, Cd(II) binding to ABCB6 is similar to that observed with GSH, except that two cysteine residues of each PC2 molecule participate in Cd(II) coordination to form a tetrathiolate. Structural comparison of human ABCB6 and its homologous Atm-type transporters indicate that their distinct substrate specificity might be attributed to variations in the capping residues situated at the top of the substrate-binding cavity.
Topics: Humans; Cadmium; Cryoelectron Microscopy; Glutathione; ATP-Binding Cassette Transporters; Protein Binding; Models, Molecular; Phytochelatins; Protein Conformation; Binding Sites
PubMed: 38822018
DOI: 10.1038/s42003-024-06377-1 -
Tropical Animal Health and Production May 2024The aim of the present study was to examine the mammary gland of dromedary camels using ultrasonography, endoscopy and radiography. These techniques are easy to perform...
The aim of the present study was to examine the mammary gland of dromedary camels using ultrasonography, endoscopy and radiography. These techniques are easy to perform in the field and feasible to diagnose pathological conditions of the mammary gland. Udders of 49 slaughtered and 26 adult dromedary camels submitted for necropsy were used for the examinations. Additionally, 11 lactating female dromedary camels were selected for the ultrasonographic udder examination. The transition from the milk ducts into the udder cistern, the teat cistern and the teat canals were examined in individual udders. Teat cistern length, teat end width, teat wall thickness, teat cistern width and middle cistern wall thickness were measured using ultrasonography. The measurements resulted in mean values of the teat cistern length of 37.3 mm, the teat end width of 2.0 mm, the teat wall thickness of 4.4 mm, the teat cistern width of 8.2 mm and the cistern wall thickness of 3.5 mm. The teat wall was differentiated into three layers, a hyperechoic outer layer, a hypoechoic middle layer and a hyperechoic inner layer. The mid cistern wall was hyperechoic. Endoscopic examination is an easy to perform and practicable method for examining the inner structures of the teats of dead animals; however, the feasibility has not been shown in lactating animals yet. Ring-like folds were present in the teat cistern, which protruded horizontally into the lumen. It was also possible to visualize the branchlike transition of the teat cistern into the larger milk ducts. Radiographic examination using barium sulfate contrast medium showed that the teat cistern ends in a network of initially wide but branching and narrowing milk ducts. The two teat canals and cisterns are completely independent of each other and there is no communication between the glandular tissue of the two canals and cisterns.
Topics: Animals; Camelus; Female; Mammary Glands, Animal; Endoscopy; Radiography; Ultrasonography
PubMed: 38819754
DOI: 10.1007/s11250-024-04009-8 -
Journal of Cardiovascular Medicine... Jun 2024Percutaneous coronary intervention (PCI) on severely calcified coronary lesions is challenging. Coronary calcified nodule (CN) refers to an eccentric and protruding... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Percutaneous coronary intervention (PCI) on severely calcified coronary lesions is challenging. Coronary calcified nodule (CN) refers to an eccentric and protruding coronary calcification associated with plaque vulnerability and adverse clinical events. This study aims to conduct an extensive review of CNs, focusing on its prognostic impact in comparison with nonnodular coronary calcification (N-CN).
METHOD
A systematic literature review on PubMed, MEDLINE, and EMBASE databases was conducted for relevant articles. Observational studies or randomized controlled trials comparing CNs and N-CNs were included.
RESULTS
Five studies comparing CNs and N-CNs were pertinent for inclusion. The total number of individuals across these studies was 1456. There were no significant differences in the baseline demographic, clinical, and angiographic data between the CN and N-CN groups. Intracoronary imaging was always utilized. At follow-up, CNs were associated with significantly increased, target vessel revascularization [odds ratio (OR) 2.16; 95% confidence interval (CI): 1.39-3.36, P-value < 0.01, I2 = 0%] and stent thrombosis (OR 9.29; 95% CI: 1.67-51.79, P-value = 0.01, I2 = 0%) compared with N-CN. A trend for greater cardiac death was also assessed in the CN group (OR 1.75; 95% CI: 0.98-3.13, P-value = 0.06, I2 = 0%).
CONCLUSION
CN has a significantly negative impact on outcomes when compared with N-CN.
Topics: Humans; Coronary Artery Disease; Vascular Calcification; Percutaneous Coronary Intervention; Risk Factors; Coronary Angiography; Treatment Outcome; Male; Female; Middle Aged; Risk Assessment; Aged
PubMed: 38818813
DOI: 10.2459/JCM.0000000000001625