Tubular Type Research Articles

Micro Tubular Solid Oxide Reversible Cell Using LaGaO3 Electrolyte Film Prepared on Channel Size Controlled NiO-YSZ Substrate

Reversible operation of SOFC is now important subjects from energy storage of renewable electric power from solar or wind power. At present, planer type cell design is widely used for this purpose, however, because of tight gas sealing, tubular type cell design is more suitable. In this study, micro tubular solid oxide cell using La0.9Sr0.1Ga0.8Mg0.2O3−δ (LSGM) thin electrolyte film was prepared by dip-coating and co-sintering process.NiO-YSZ porous substrate with 10 mm diameter and 30 mm length was used for preparation of the cell. LaGaO3 based oxide film was deposited with dip coating method. Two kinds of NiO and YSZ particles with different particle size (0.91 and 0.65 mm for NiO and 0.62 and 0.25 mm for YSZ) were mixed and extruded for tubular substrate. 4 types of NiO-YSZ anode porous substrate were Average porosity of each 4 tubular substrate was ca. 70% after reduction. However, from SEM observation, channel size in NiO-YSZ substrate was changed and NiO-YSZ using larger NiO and YSZ particles shows larger channel diameter.Power generation property of 4 tubular cell using different NiO and YSZ particle size for substrate. It was found that the cell deposited on NiO-YSZ using larger particles shows lager power density, in particular, the cell using both NiO and YSZ larger particles shows the largest power density (0.37 W/cm2 at 873 K), which is reasonably large power density. On the other hand, in case of electrolysis, channel size is also strongly influenced on the electrolysis current. As similar manner with fuel cell operation, the LSGM cell prepared on larger particles size of NiO and YSZ shows larger steam electrolysis current. Impedance analysis suggests that the effects of particle size of NiO and YSZ was explained by small concentration overpotential, and so larger channel size is effective for improving the initial performance of the SORC performance. Long term stability of the steam electrolysis was performed and it was found that the LSGM tubular cell prepared on NiO-YSZ with larger particles shows the reasonable stable electrolysis performance in long term stability (-4%/1000h average degradation rate). The main reason for degradation was assigned to the increased IR loss however overpotential was hardly changed over 600 h and so it seems most likely that the reoxidation of NiO or aggregation of NiO is the main reason for degradation of the cell.This study reveals that the control of channel size in NiO-YSZ porous substrate is highly important for initial performance and long-term stability of SORC.

Investigate the role of PIK3CA gene expression in colorectal polyp development

ABSTRACT Background Polyps are pathological concerning histological changes that develop during colorectal and rectal cancer. The degree of polyp severity is due to their ability to transform the polyp cells from normal to malignant. PIK3CA is a gene that plays an important role in cell cycle regulation. Objective The study aims to evaluate PIK3CA gene expression in tissues of colorectal polyps. Methods Two study groups employed in the current study were patients (n = 68) and the control group (n = 50). Immunohistochemical techniques were applied to paraffin-embedded tissues to localize PIK3CA expression. Results The current study showed a significant difference between the control and patients group in PIK staining results; in the control group, there was no case positive for PIK, while in the patient group, all cases were positive. In the rectum, there was no significant difference between cases given positive and negative. Among histological types, according to tubular adenoma histological type, in the right colon, the cases which gave positive for PIK were significantly lower than negative, while in the left colon, the cases which gave positive were significantly higher than negative. Conclusion The PIK3CA gene initiates polyp formation and benign tumoral growths, which may subsequently undergo malignant transformation.

Divergent Actions of Renal Tubular and Endothelial Type 1 IL-1 Receptor Signaling in Toxin-Induced AKI.

Activation of the type 1 IL-1 receptor (IL-1R1) triggers a critical innate immune signaling cascade that contributes to the pathogenesis of AKI. However, blockade of IL-1 signaling in AKI has not consistently demonstrated kidney protection. The current murine experiments show that IL-1R1 activation in the proximal tubule exacerbates toxin-induced AKI and cell death through local suppression of apolipoprotein M. By contrast, IL-1R1 activation in endothelial cells ameliorates AKI by restoring VEGFA-dependent endothelial cell viability. Using this information, future delivery strategies can maximize the protective effects of blocking IL-1R1 while mitigating unwanted actions of IL-1R1 manipulation. Activation of the type 1 IL-1 receptor (IL-1R1) triggers a critical innate immune signaling cascade that contributes to the pathogenesis of AKI. IL-1R1 is expressed on some myeloid cell populations and on multiple kidney cell lineages, including tubular and endothelial cells. Pharmacological inhibition of the IL-1R1 does not consistently protect the kidney from injury, suggesting there may be complex, cell-specific effects of IL-1R1 stimulation in AKI. To examine expression of IL-1 and IL-1R1 in intrinsic renal versus infiltrating immune cell populations during AKI, we analyzed single-cell RNA sequencing (scRNA-seq) data from kidney tissues of humans with AKI and mice with acute aristolochic acid exposure. We then investigated cell-specific contributions of renal IL-1R1 signaling to AKI using scRNA-seq, RNA microarray, and pharmacological interventions in mice with IL-1R1 deletion restricted to the proximal tubule or endothelium. scRNA-seq analyses demonstrated robust IL-1 expression in myeloid cell populations and low-level IL-1R1 expression in kidney parenchymal cells during toxin-induced AKI. Our genetic studies showed that IL-1R1 activation in the proximal tubule exacerbated toxin-induced AKI and cell death through local suppression of apolipoprotein M. By contrast, IL-1R1 activation in endothelial cells ameliorated aristolochic acid-induced AKI by restoring VEGFA-dependent endothelial cell viability and density. These data highlight opposing cell-specific effects of IL-1 receptor signaling on AKI after toxin exposure. Disrupting pathways activated by IL-1R1 in the tubule, while preserving those triggered by IL-1R1 activation on endothelial cells, may afford renoprotection exceeding that of global IL-1R1 inhibition while mitigating unwanted actions of IL-1R1 blockade.

Integrated single-nucleus sequencing and spatial architecture analysis identified distinct injured-proximal tubular types in calculi rats

BackgroundUrolithiasis with high prevalence and recurrence rate, has impacts on kidney injury in patients, becomes a socioeconomic and healthcare problem in worldwide. However, the biology of kidney with crystal formation and proximal tubular injury remains essentially unclear. The present study aims to evaluate the cell biology and immune-communications in urolithiasis mediated kidney injury, to provide new insights in the kidney stone treatment and prevention.ResultsWe identified 3 distinct injured-proximal tubular cell types based on the differentially expression injury markers (Havcr1 and lcn2) and functional solute carriers (slc34a3, slc22a8, slc38a3 and slc7a13), and characterized 4 main immune cell types in kidney and one undefined cell population, where F13a1+/high/CD163+/high monocyte & macrophage and Sirpa/Fcgr1a/Fcgr2a+/high granulocyte were the most enriched. We performed intercellular crosstalk analysis based on the snRNA-seq data and explored the potential immunomodulation of calculi stone formation, and founded that the interaction between ligand Gas6 and its receptors (Gas6-Axl, Gas6-Mertk) was specifically observed in the injured-PT1 cells, but not injured-PT2 and -PT3 cells. The interaction of Ptn-Plxnb2 was only observed between the injured-PT3 cells and its receptor enriched cells.ConclusionsPresent study comprehensively characterized the gene expression profile in the calculi rat kidney at single nucleus level, identified novel marker genes for all cell types of rat kidney, and determined 3 distinct sub-population of injured-PT clusters, as well as intercellular communication between injured-PTs and immune cells. Our collection of data provides a reliable resource and reference for studies on renal cell biology and kidney disease.

Comparative Histology and Histochemistry of the Parotid Gland and Mandibular Gland in the Lowland Tapir (Tapirus terrestris Perissodactyla) and Aardvark (Orycteropus afer Tubulidentata).

In terrestrial mammals, the parotid and mandibular glands secrete different types of saliva into the oral cavity. Both glands were obtained from two female lowland tapirs (Tapirus terrestris) and one female aardvark (Orycteropus afer) from the Wroclaw Zoological Garden (Poland) and examined by light microscopy (hematoxylin and eosin, mucicarmine, periodic acid-Schiff, Alcian blue pH 1.0, Alcian blue pH 2.5, Alcian blue pH 2.5/PAS, and Hale's dialysed iron). Both the parotid glands observed in the lowland tapir and aardvark were compound alveolar serous secretory units, and in both species, the secretion was composed of neutral and acidic mucopolysaccharides (sialo and sulfated mucins). However, in both the lowland tapir and aardvark, a histological examination found the stroma of the mandibular gland was divided into very large lobes by poorly marked connective tissue. While many interlobar and striated ducts were found in the aardvark, very few were found in the lowland tapir. The mandibular gland was a branched tubular (mucous secretion) type in the lowland tapir, but it was a branched tubuloalveolar (mucous-serous) type in the aardvark. In all tested glands, the secretion was composed of neutral mucopolysaccharides, acid-sulfated mucosubstances, and sialomucins.

Lobular carcinomas of the breast: cytological diagnostics

AIMS: To estimate potentialities of cytological diagnostics of different types of lobular carcinomas of the breast while outpatient examination.
 MATERIALS AND METHODS: The data of cytological investigations of 444 patients with carcinoma, which were detected by fine-needle aspiration biopsy, were studied. Traditional cytological diagnostics, as well as the liquid-based technique of preparation of patterns were used, staining of patterns according to the Pappenheim and Papanicolaou methods. A standard protocol for immunocytochemical reactions was used.
 RESULTS: Lobular carcinoma was detected in 15 patients. Types of lobular carcinomas were verified by cytological method were retrospectively identified.
 Classical, solid and tubular types of lobular carcinoma (n=7,46.7%; n=5,33.3%; n=1,6.7%) differed from unspecified breast carcinomas. In the classical type, vacuoles with a target-like inclusion (probably a drop of mucin) were a significant feature. In the solid type, the absence of complexes with a large number of separately located similar tumor cells was noticed. The tubular type was distinguished by the presence of tubular structures. The liquid-based technique helps to differentiate lobular and unspecified carcinoma using an immunocytochemical reaction with E-cadherin.
 CONCLUSION: The results of the study indicate that lobular carcinomas of the breast are 3.4% of all breast carcinomas. Taking into consideration the differences in prognosis, it is important to differentiate between lobular and unspecified ductal carcinoma at the outpatient level of diagnostics, as this is deciding for treatment strategy choice.

Stable tetranuclear copper cage as efficient heterogeneous catalyst for C−C and C−N bond forming reactions

Two tetranuclear copper cages with tubular type, [Cu4(BMBA)4((CH3)2N)2(H2O)2] (1) and [Cu4(BMBA)4(Bipy)(H2O)2] (2), were successfully constructed by the reaction of Cu(NO3)2 with dicarboxylic acid 4,4′-[(ethylazanediyl)bis(methylene)]-bis[(1,1′-biphenyl)-2-carboxylic acid] (H2BMBA) under solvothermal conditions. The complexes 1 and 2 exhibit a similar cage structure, formed by four ligands connecting two binuclear copper paddle-wheel secondary building units (SBUs). Interestingly, the complex 2 was obtained by appropriately binding of 4, 4′-bipyridine (Bipy) molecule on the axial positions of two Cu paddle-wheels inside the cage. For this reason, the complex 2 exhibits excellent stability in some common organic solvents at room temperature and aqueous solutions with a pH of 2 to 12. Upon thermal activation of complex 2, the coordinated water molecules can be removed, and its exposed metal active-sites show Lewis acid character, which can be used an efficient heterogeneous catalysis of Knoevenagel condensation (CC) and Clauson-Kaas (CN) reactions.

Comparison of radiological abnormalities between the jugular bulb and the vestibular aqueduct in patients with Ménière's disease.

Anatomical variations of the inner ear may contribute to the development of Ménière's disease (MD), which is a complex inner ear disorder histopathologically characterized by idiopathic endolymphatic hydrops (ELH). Abnormalities of the vestibular aqueduct (VA) and the jugular bulb (JB) have been suggested as predisposing factors. Yet, few studies have investigated the correlation between JB abnormalities and VA variations as well as its clinical relevance in these patients. In this retrospective study, we investigated the differences in the incidence of radiological abnormalities of the VA and JB in patients with definite MD. Anatomical variations of JB and VA were evaluated based on high-resolution CT (HRCT) in a series of 103 patients with MD (93 unilateral cases and 10 bilateral cases). JB-related indices included JB anteroposterior and mediolateral diameter, JB height, JB type regarding to Manjila classification system, and incidences of JB diverticulum (JBD), JB related inner ear dehiscence (JBID), and inner ear adjacent JB (IAJB). VA-related indices included CT-VA visibility, CT-VA morphology (funnel, tubular, filiform, hollow, and obliterated-shaped type), and peri-VA pneumatization. Radiological indices were compared between MD ears and control ears. Radiological JB abnormalities were comparable between MD ears and control ears. As for VA-related indices, the CT-VA visibility was lower in MD ears than in control ears (p = 0.004). The distribution of CT-VA morphology was significantly different between MD and control ears (p = 0.013), with a higher proportion of obliterated-shaped type in MD ears (22.1%) than in control ears (6.6%). Compared with JB abnormalities, the anatomical variations of VA are more likely to be an anatomically predisposing factor for MD.

Design of Automatic Underwater Object Detection and Tracking System for Penta Tubular ROV in Blue Economy Environment

The development of underwater vehicles has opportunity to be further improved. One of the most challenging for developing underwater vehicle is developing automatic tracking system for Autonomous Underwater Vehicle (AUV). This research develops AUV with automatic object detection and tracking systems. These systems are developed by using vision-based method. The AUV is designed with Penta Tubular type whereas the automatic object detection system is started from captured image taken by underwater camera in the form of Blue-Green-Red (BGR) color space, which then will go through a masking process. The object resulted by object detection system is then to be used as followed object for automatic tracking system. Meanwhile, Automatic object tracking system is established by using two vertical lines that are used as motion parameters of the AUV. By considering the object position compared with the two vertical lines, the automatic tracking guidance system can be generated. The developed automatic object detection and tracking systems can be used well for AUV, in which verage travel time for forward and backward motion are 14.20 seconds in 0.14 m/s, and 19.82 seconds in 0.1 m/s while average travel time is 15.36 seconds and 13.58 seconds for right and left motion test respectively.

Expression of type VI collagen α3 chain in canine mammary carcinomas

This study aimed to investigate the expression of type VI collagen α3 chain (COL6a3) in neoplastic cells of canine mammary gland carcinomas (CMGCs) using immunohistochemistry (IHC) and to evaluate the association between COL6a3 expression and tumor histological features, histological grades, and the differentiation status of neoplastic epithelial cells. COL6a3 expression in carcinoma cells was significantly associated with histologically low malignancy and low mitotic indices. In addition, COL6a3+ carcinoma cells were more frequently detected in simple carcinomas (tubular and tubulopapillary types) than in solid carcinomas. These findings indicate that reduced expression of COL6a3 in carcinoma cells contributes to the malignant phenotype in CMGCs. We also showed that COL6a3 expression in the carcinoma cells was more frequently detected in CK19+/CD49f + and/or CK19+/CK5+ tumors. In addition, COL6a3+/CK19+/CD49f + and COL6a3+/CK19+/CK5+ tumors consisted of CK19+/CD49f + and CK19+/CD49f- cells, and CK19+/CK5+ and CK19+/CK5- cells, respectively. Most of these tumors more frequently expressed GATA3, but not Notch1. These results indicate that COL6a3 is expressed in CMGCs containing both luminal progenitor-like and mature luminal-like cells and showing differentiation ability into mature luminal cells. It is possible that COL6 may be involved in the differentiation of luminal progenitor-like carcinoma cells into mature luminal-like carcinoma cells in CMGCs, which may suppresses the development of malignant phenotypes in CMGCs.

Transesophageal echocardiography-guided percutaneous patent ductus arteriosus closure without fluoroscopy

ObjectivesA retrospective study was performed to summarize the experience of transcatheter closure of patent ductus arteriosus (PDA) through the right femoral vein under the guidance of transesophageal echocardiography (TEE).MethodsFrom January 2019 to September 2021, 75 children who underwent PDA closure through the right femoral vein under the guidance of TEE were included. The guide wire and delivery sheath were inserted through the ductus arteriosus into the descending aorta via the right femoral vein, and the occluder was subsequently deployed. After discharge, all patients were required for outpatient follow-ups at 1, 3, 6 and 12 months.ResultsIn this group, patients were older than 10 months of age and body weight greater than 8 kg. Among 75 cases with PDA, 63 were tubular type and 12 were conical type. The mean operative time was 40.2 ± 7.3 min. The size of PDA occluder ranged from 4–6 to 12–14 mm. The mean hospital stay was 5.5 ± 0.5 days. One month after discharge, there were 4 cases with a mild residual shunt. Eventually, the residual shunt was not observed during 3, 6, and 12 months of follow-up.ConclusionsPDA closure under the guidance of TEE can be performed through the right femoral vein successfully and effectively. This procedure has no contrast agent usage, radiation exposure, or open incisions.

Floral Development Stage-Specific Transcriptomic Analysis Reveals the Formation Mechanism of Different Shapes of Ray Florets in Chrysanthemum.

The formation mechanism of different ray floret shapes of chrysanthemum (Chrysanthemum × morifolium) remains elusive due to its complex genetic background. C. vestitum, with the basic ray floret shapes of the flat, spoon, and tubular types, is considered a model material for studying ray floret morphogenesis. In this study, the flat and tubular type lines of C. vestitum at specific stages were used to investigate the key genes that regulate morphological differences in ray florets. We found that the expression levels of genes related to auxin synthesis, transport, and response were generally higher in the tubular type than in the flat type. CvARF3 was highly expressed in the flat type, while CvARF5 and CvARF6 were highly expressed in the tubular type. Additionally, the transcription levels of Class B and E genes closely related to petal development, including CvPI, CvAP3, Cvdefh21, CvSEP3, and CvCDM77, were expressed at higher levels in the tubular type than the flat type. Based on the results, it is proposed that auxin plays a key role in the development of ray florets, and auxin-related genes, especially CvARFs, may be key genes to control the morphological difference of ray florets. Simultaneously, MADS-box genes are involved in the co-regulation of ray floret morphogenesis. The results provide novel insights into the molecular mechanism of different petal type formation and lay a theoretical foundation for the directional breeding of petal type in chrysanthemums.

Mechanism Affecting the Pore Differentiation Characteristics of Fine-Grained Tight Sandstones: A Case Study of Permian Shanxi Formation in Ordos Basin.

In this study, the pore-throat structure and lithological and fractal characteristics of fine-grained sandstone reservoirs of Permian Shanxi Formation in Ordos Basin are investigated using various experiments, including casting thin section, scanning electron microscopy (SEM), high-pressure mercury injection (HPMI), and nuclear magnetic resonance (NMR). The relation between rock type difference and pore structure difference is explored, and the controlling effect of pore-throat structure on physical properties of fine-grained sandstone reservoir is studied. The results show that the sandstone sample can be categorized into quartz arenites, sublitharenite, and lithic sandstone. The average porosity and permeability are, respectively, 4.46% and 0.129 mD. The pores are mainly of intergranular and intercrystalline types, and the throats are lamellar and tubular types. Furthermore, the fine-grained sandstone is typically characterized by a binary pore structure. Micropore-throat, as the main reservoir space, is the dominant factor of the reservoir physical property difference. In addition, the correlation between fractal dimension and rock composition is studied with pore-throat morphology being comprehensively analyzed. The results indicate that the quartz arenite is dominated by quartz intergranular lamellar throats, and there are numerous intergranular pores and tubular throats connecting them in litharenite and sublitharenite. Moreover, the content of pores and throats play major roles in the change of fractal dimension. The characteristics, causes, and main controlling factors of micropore and throat types should be emphatically analyzed to predict the physical properties of fine-grained sandstone.

Desain dan analisis chassis tipe tubular space frame

Automotive is one of the mainstay products in the world today, especially in 4-wheeled vehicles and 2-wheeled vehicles. One of them is electric cars whose main driving force uses electric power. Some of the advantages possessed by electric vehicles with oil-fueled vehicles include free air police from exhaust fumes, no odor and a smoother motor sound. The development of electric cars in Indonesia, which is now growing rapidly, especially among university students, is being held with competitions to make electric cars that are worthy of being marketed. For that we need an energy-efficient car chassis design that is in accordance with the regulations of the Indonesian Electric Car Competition (KMLI). Research on the design chassis in previous studies has been done with different dimensions, materials, and types of chassis used. The purpose of this research is to design and analyze chassis type Tubular Space Frame using Solidworks 2019 Software in the hope of producing a chassis that is strong, lightweight and has flexibility properties while still paying attention to the Factor of Safety (FOS) when used. The chassis designed using Solidwork 2019 software has dimensions, including: Length = 1883.40 mm, Height = 1033.40 mm, Width = 721.34 mm. The results of the analysis and determination of the material between Aluminum 6061-T6 and Aluminum 6063-T6 used with a comparison of the values ​​of stress, displacement, and safety of factors that occur in the frame, it can be concluded that the chassis is a tubular type with the use of pipes 34.4 x 26.64 3.38 mm thick and 21.36 x 15.50 mm thick 2.77 mm is the most secure chassis and the weight is quite light.

Neuroimaging Spectrum of Intracranial Lipomas.

Intracranial lipomas are rare congenital malformations at characteristic sites. Though largely asymptomatic, some cause significant morbidity. We are studying this for the local population. Objectives: The purpose of this article is to analyze the spectrum of intracranial lipomas, determine their distribution at characteristic locations, and assess their associations. Method: A retrospective study of 21 patients diagnosed with intracranial lipomas detected on CT and MRI performed between September 2017 and May 2022 at Dr. D.Y. Patil Medical College, Hospital & Research Center, Pune. Amongst the21 patients with intracranial lipomas, the most common locationwas the pericallosal region seen in 11 patients (n = 11, 52.3%), of which nine were curvilinear type (n = 9), more common than tubular nodular type (n = 2). Other locations (n = 10, 47.7%) were found to be; quadrigeminal cistern in six patients (28.5%), cranial diploic space in two patients (9.5%), one each ininterhemispheric falx (4.8%), and cribriform plate (4.8%). Associated anomalies were observed in three patients, which werefronto-ethmoidal encephalocele (n = 1), partial agenesis of the corpus callosum (n = 2), extension with a frontal subcutaneous lipoma (n = 1), and bilateral intraventricular extension (n = 1). Presenting symptoms were headache and dizziness (38.1%), seizures (19%), swelling on the forehead (9.5%), and other non-specific clinical symptoms (33.3%). Intracranial lipomas are rare congenital lesions that are usually asymptomatic and discovered incidentally. However, lipomas at interhemispheric locations can cause seizure disorders and some present with headaches and dizziness. Few have associations like communication with extracranial swellings and corpus callosum agenesis.

Admissible Homomorphisms and Equivariant Relations Between Weighted Projective Lines

Abstract The string group acts on the category of coherent sheaves over a weighted projective line by degree-shift actions. We study the equivariant relations induced by degree-shift actions between weighted projective lines. We prove that such an equivariant relation is characterized by an admissible homomorphism between the associated string groups. We classify all these equivariant relations for the weighted projective lines of domestic and tubular types, respectively.

Standard Time Measurement Of Erection & Dismantling Of Tubular Scaffold Vs Modular Scaffold To Design Work Method

The large demand for the use of scaffolding is a problem for contractors, especially for profitability and work productivity. If the selection of the type of scaffolding is not in accordance with expectations both in terms of working time and wage costs for scaffolding workers, as well as safety factors which are also important in the selection of the type of scaffolding will cause cost overruns. One of the efforts made is to replace conventional methods to be more scientific, namely measuring the standard time in the installation and dismantling of scaffolding, so that the standard work time is obtained as a reference for the work method used. Measurements were made of two types of installation and dismantling, namely tubular scaffolding and modular scaffolding. Setting standard time using performance rating and allowances that were adjusted to workplace conditions.Based on the measurements, it was found that the standard time for installation and dismantling of tubular type scaffolding they were 2 hours 7 minutes and 39 minutes respectively, while for modular scaffolding they were 25 minutes and 8 minutes respectively.

Аберрантная экспрессия р53 в карциноме желудка и ее связь с HER2 статусом

Introduction. p53 is a tumor suppressor, whose expression is actively studied in many tumors. However, scientists argue about aberrant p53 expression criteria and whether tumoral p53 expression correlates with various clinical and morphological parameters of gastric cancer and has a prognostic role. No data were published in Russia on the incidence of tumors with p53 overexpression. It remains unclear whether aberrant p53 expression is an independent prognostic sign in gastric cancer. The study aimed to evaluate the frequency of p53 expression in gastric adenocarcinomas in the Russian population, to give the definition for aberrant p53 expression, and to clarify the relationship between p53 expression, clinical and morphological tumor characteristics, HER2 status, and the impact of p53 expression on the prognosis. Materials and methods. We studied surgical pathology samples from 310 patients with verified gastric cancer. The age of the patients ranged from 22 to 85 years (mean 63 years). Each sample was stained immunohistochemically with antibodies to p53 (clone DO-7) and the HercepTest kit (Dako/Agilent Technologies). We compared the results with the main clinical and morphological characteristics of gastric cancer and patient survival data. Results.The frequency of aberrant p53 expression was 49.4%. Aberrant expression should include both cases with overexpression and cases with a complete absence of marker expression. In contrast to the normal p53 expression group, the group with aberrant p53 expression was characterized by more frequent proximal tumor location; fewer diffuse and infiltrative carcinoma forms; a significant predominance of tubular, papillary, and mixed histological types (p=0.000); significantly higher degrees of differentiation (p=0.011); a significantly lower number of cases with identified signet ring cells in tumors (p=0.000); a lower frequency of stage IV in patients; and a significant predominance of the intestinal and intermediate subtype according to P. Lauren classification (p=0.000). The overall five-year survival in patients with aberrant p53 expression was not significantly lower (p=0.392) than in patients with normal p53 expression (35.6%, median 36 months and 42.5%, median 51 months, respectively). According to the Cox proportional hazards regression model, the p53 expression level is not a significant prognostic sign (HR=1.281; CI: 0.818–2.008, p=0.280). In the group with aberrant p53 expression, a positive HER2 status was detected significantly more often (13.7%) than in the group with normal p53 expression (1.9%, p=0.000). Conclusion. The group with aberrant p53 expression can be considered as an immunohistochemical analog of the chromosomally unstable gastric cancer subtype (according to TCGA) and the MSS/TP53- subtype (according to ACRG). In the group with aberrant p53 expression, cases with a positive HER2 status were significantly more common. Keywords: р53, HER2/neu, ERBB2, gastric cancer, gastric adenocarcinoma, immunohistochemistry

Cytodifferentiation of fundic part of glandular stomach in non descript breed of Indian prenatal goat

Though the anatomy and physiology of the adult caprine (Capra hircus L.) stomach have been investigated extensively, the early development of the abomasum has not yet been fully elucidated. The glandular part of abomasum plays an important role in digestion of ingested food by action of gastric juices. Very few studies have been conducted so far regarding histogenesis of goat foetal abomasum in India. In the present study, we have investigated the embryonic and early foetal development of the goat, Capra hircus L. fundic abomasum. We collected 36 developing abomasum of healthy and normal embryos/foeti of goat and assigned them into three group viz. Gr. I (0-50 days of gestation), Gr. II (51-100 days of gestation) and Gr. III (101-150 days of gestation). Small pieces of tissues were processed by routine paraffin. The wall of glandular stomach, the fundic part, was composed of epithelium, pleuripotent blastemic tissue and serosa up to 44 days of gestation. Tunica muscularis became separable at 46 days of gestation. The epithelium was stratified type up to 50 days and gradually changed to pseudo-stratified columnar to simple columnar type from 76 days of gestation. Primary and secondary abomasal folds were observed at 51 and 76 days of gestation, respectively. Gastric pit, the fore runner of gastric gland was reported first at 70 days. The gland became branched tubular type at 145 days. The cells found in the mucosa of the abomasum were surface epithelial cells, chief cells, parietal cells, mucous neck cells and undifferentiated cells. Chief and parietal cell were observed at 76 days and mucous neck cells at 82 days of gestation. Reticular, collagen and elastic fibers came into sight at 38, 76 and 100 days of gestation, respectively. The present study is expected to supplement known data and knowledge regarding histogenesis of goat fetal abomasum and help in diagnosis and treatment of related congenital anomalies.

Gastrointestinal Bleeding in a Child: Is It a Meckel Diverticulum?

A 2-year-9-month-old boy with multiple episodes of melena and hematochezia with unclear cause was admitted to our hospital. Laboratory tests showed iron deficiency anemia (hemoglobin of 5 g/dL) and positive fecal occult blood test. Single-operator double-balloon enteroscopy (DBE) through the anal route was performed and revealed multiple patchy mucosal eminence consisted of ectopic gastric pit and loss of villi observed by electronic stain in the distal jejunum, approximately 2 m from the ileocecal valve. The bowel cavity was deformed like a maze in the distal jejunum. There are several mucosal bridging structures and focal stricture, making it difficult to determine the direction of the lumen. Two irregular deep ulcers were found near the stricture (A [a–f] and Video 1). Emission computer tomography Tc99m pertechnetate scan showed multiple areas of radioisotope uptake in the middle and lower abdomen. At laparotomy, a 46-cm-long cyst was noted on the mesentery aspect that protruded alongside from the distal jejunum (B [a–c]). Resection of 58 cm of the jejunum was performed including the cyst. Pathology showed a duplication cyst located on the mesenteric aspect with ectopic gastric mucosa (C). The postoperative diagnosis was a duplication cyst of the jejunum. The patient was discharged 14 days after surgery and remained symptom-free thereafter. Intestinal duplication cysts are rare congenital malformations that can appear anywhere in the gastrointestinal tract. The preoperative diagnosis of a duplication cyst is difficult and can be easily misdiagnosed as Meckel diverticulum. Duplication cysts usually locate on the mesenteric aspect as in our case, in contrast to Meckel diverticulum that localizes on the antimesenteric aspect. In our case, the deformed intestine was found approximately 2 m from the ileocecal valve, which was not common in Meckel diverticulum. To the best of our knowledge, this is the first reported tubular type of jejunal duplication cyst case with an DBE video. DBE can be a useful tool for the diagnosis of intestinal duplication in young children. Watch the Video, Supplementary Digital Content 1, https://links.lww.com/AJG/C853. (Informed consent was obtained from the patient to publish these images.)