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排序方式: 共有390条查询结果,搜索用时 15 毫秒
1.
Abdullah Saleh AlQattan MBBS Weaam Zohier Ghulam MBBS Najla Aldaoud MBBS Lama Algheryafi MBBS Nadia Aleisa MBBS Fozan A. Aldulaijan MBBS 《The breast journal》2021,27(3):258-263
Breast fat necrosis (BFN) is usually a benign inflammatory response to breast trauma. However, an extremely rare cause of fat necrosis is calciphylaxis, a calcification of small- and medium-sized arteries causing thrombosis and ischemia. It is classified into (A) uremic (B) nonuremic-induced calciphylaxis. Calciphylaxis has been reported to be encountered in different parts of the body. However, to the best of our knowledge there is only one case in the English literature of BFN 2ry to warfarin-induced calciphylaxis. We report a 65-year-old female, known case of atrial fibrillation on warfarin, presented with a left breast mass of 4-month duration. The mass was painful and progressively enlarging. Examination of the left breast showed 7 × 4 cm mass, spanning from 10-2 o'clock, free from surrounding structures, with preserved overlying skin. However, the mass was not visualized on mammogram. Ultrasound showed a left breast lobulated hypoechoic mass containing a hyperechoic component. Biopsy showed fat necrosis. After 1 month, she presented with ulceration of the overlying skin. After wide local excision, histopathology demonstrated a calciphylaxis-induced fat necrosis. Considering the patient's background, the diagnosis was BFN secondary to warfarin-induced calciphylaxis. Hence, the warfarin was shifted to Rivaroxaban, 6 months follow-up showed no evidence of recurrence. In conclusion, the rarity of nonuremic calciphylaxis is reflected on the delay of diagnosis in some of the reported cases and the lack of grading system used to guide the management of such difficult wounds. However, keeping a high index of suspicion is important whenever such wounds are encountered with presence of risk factors other than end-stage kidney disease. 相似文献
2.
Nafamostat mesilate suppresses NF-kappaB activation and NO overproduction in LPS-treated macrophages 总被引:2,自引:0,他引:2
Noguchi S Nakatsuka M Konishi H Kamada Y Chekir C Kudo T 《International immunopharmacology》2003,3(9):1335-1344
Nafamostat mesilate (NM), a clinically used serine protease inhibitor, suppressed the overproduction of nitric oxide (NO) and the expression of inducible nitric oxide synthase (iNOS) in RAW264.7 murine macrophages treated with lipopolysaccharide (LPS, 100 ng/ml); however, it had little effect on endothelial NOS (eNOS) in human umbilical vein endothelial cells (HUVEC). Electrophoretic mobility shift assay (EMSA) revealed that LPS activated nuclear factor-kappaB (NF-kappaB) in RAW264.7 cells and that this activation was suppressed by nafamostat mesilate. Western blotting showed that nafamostat mesilate suppressed the phosphorylation and degradation of inhibitor kappaB-alpha (IkappaB-alpha), which holds NF-kappaB in the cytoplasm in an inactivated state. Our observations suggest that nafamostat mesilate is a candidate agent for various diseases such as ischemia-reperfusion, graft rejection, inflammatory diseases, and autoimmune diseases, in which iNOS and/or NF-kappaB are upregulated. 相似文献
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Halima Al-tamimi Alia A. Al-Hadi Al-Hareth Al-Khater Issam Al-bozom Najla Al-sayed 《Archives of gynecology and obstetrics》2009,280(3):465-468
Abstract A case report and review of an extraskeletal neuroectodermal tumour of the vagina.
Background Ewing’s sarcoma (ES) and primitive neuroectodermal tumours (PNETs) account for approximately 6–10% of primary malignant bone
tumours and, following osteosarcoma, are the second most common group of bone sarcomas in children. Ewing’s sarcoma rarely
affects the genitourinary tract.
Case summary We report a rare case of extraskeletal Ewing’s sarcoma diagnosed in a 47-year-old Indian woman presenting with a simple cystic
lesion in the posterior wall of the vagina. The histopathology revealed a rare presentation of a primitive malignant extraskeletal
neuroectodermal tumour.
Conclusion As our PubMed review found only six previously reported cases of vaginal extraskeletal Ewing’s sarcoma. Presentation as vaginal
masses helped in early disease detection. 相似文献
5.
Obradovic VB Artiko V Chebib HY Petrovic MN Vlajkovic M Petrovic NM 《Hepato-gastroenterology》2000,47(33):738-741
BACKGROUND/AIMS: The aim of the study was to introduce the chosen and modified model of the nuclear medicine method for the detection and quantification of enterogastric reflux, as well as evaluation of its clinical validity. METHODOLOGY: The study was performed in 172 patients: with gastric and duodenal ulcer, after Billroth I and Billroth II gastrectomy, with gastroesophageal reflux, after cholecystectomy, with chronic cholecystitis and chronic duodenal disease. Acquisition was performed with a gamma camera, during 90 min after intravenous application of 185MBq 99mTc-Dietil IDA. Test meal was given in the 30th minute, while the gastric region was marked at the end of the study. On the basis of the radioactivity changes in the regions of the stomach and hepatobiliary system, the presence of enterogastric reflux was determined and its index calculated. RESULTS: In all the groups of patients, values were significantly higher than in the controls (P < 0.05). The most frequent occurrence and the largest quantity of reflux was present in patients after Billroth II gastrectomy with significantly different values from other groups of patients (P < 0.05). CONCLUSIONS: The obtained results approve clinical value of the chosen and modified scintigraphy of enterogastric reflux, as a non-invasive and physiological method, which provides exact data about its presence and quantity. 相似文献
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7.
Identification of the Molecular Determinants of the Antibacterial Activity of LmutTX,a Lys49 Phospholipase A2 Homologue Isolated from Lachesis muta muta Snake Venom (Linnaeus, 1766)
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Rafaela Diniz‐Sousa Cleópatra A. S. Caldeira Anderson M. Kayano Mauro V. Paloschi Daniel. C. Pimenta Rodrigo Simões‐Silva Amália S. Ferreira Fernando B. Zanchi Najla B. Matos Fernando P. Grabner Leonardo A. Calderon Juliana P. Zuliani Andreimar M. Soares 《Basic & clinical pharmacology & toxicology》2018,122(4):413-423
Snake venom phospholipases A2 (PLA2s) are responsible for numerous pathophysiological effects in snakebites; however, their biochemical properties favour antimicrobial actions against different pathogens, thus constituting a true source of potential microbicidal agents. This study describes the isolation of a Lys49 PLA2 homologue from Lachesis muta muta venom using two chromatographic steps: size exclusion and reverse phase. The protein showed a molecular mass of 13,889 Da and was devoid of phospholipase activity on an artificial substrate. The primary structure made it possible to identify an unpublished protein from L. m. muta venom, named LmutTX, that presented high identity with other Lys49 PLA2s from bothropic venoms. Synthetic peptides designed from LmutTX were evaluated for their cytotoxic and antimicrobial activities. LmutTX was cytotoxic against C2C12 myotubes at concentrations of at least 200 μg/mL, whereas the peptides showed a low cytolytic effect. LmutTX showed antibacterial activity against Gram‐positive and Gram‐negative bacteria; however, S. aureusATCC 29213 and MRSA strains were more sensitive to the toxin's action. Synthetic peptides were tested on S. aureus, MRSA and P. aeruginosaATCC 27853 strains, showing promising results. This study describes for the first time the isolation of a Lys49 PLA2 from Lachesis snake venom and shows that peptides from specific regions of the sequence may constitute new sources of molecules with biotechnological potential. 相似文献
8.
Olea europaea leaves are one of the most widely used by-products in traditional medicine due to their biological properties. This study evaluated the antioxidant activities, and the beneficial effects of the aqueous extract of “Sahli” Olea europaea leaves on diclofenac-induced haematotoxicity and nephrotoxicity in Swiss albino mice. The mice were divided into four groups of seven each: a control group, a diclofenac-treated group, a group orally gavaged with the extract of olive leaves, and a group pre-treated with the extract of olive leaves and then injected with diclofenac. The results obtained indicated that the injection of the mice with diclofenac alone caused an extensive change in their haematological and biochemical parameters, such as red and white blood cells (RBC and WBC, respectively), platelet count (PLT), and creatinine and urea levels, a significant increase in lipid peroxidation level (TBARS) and a decrease in superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPX) levels. Olive leaf extract administration in the diclofenac-treated mice was found to correct and restore all the investigated parameters and protect the kidney histology by minimizing the oxidative stress induced by diclofenac in the mice tissues. Olea europaea leaves are one of the most widely used by-products in traditional medicine due to their biological properties. 相似文献
9.
Rami A. Ballout Cheryl Dickerson Myra J. Wick Najla Al‐Sweel Amanda S. Openshaw Siddharth Srivastava Lindsay C. Swanson Nuria C. Bramswig Alma Kuechler Bo Hong Leah R. Fleming Kathryn Curry Stephen P. Robertson Erica F. Andersen Ayman W. El‐Hattab 《Human mutation》2020,41(7):1238-1249
Int22h1/Int22h2‐mediated Xq28 duplication syndrome is a relatively new X‐linked intellectual disability syndrome, arising from duplications of the subregion flanked by intron 22 homologous regions 1 and 2 on the q arm of chromosome X. Its primary manifestations include variable cognitive deficits, distinct facial dysmorphia, and neurobehavioral abnormalities that mainly include hyperactivity, irritability, and autistic behavior. Affected males are hemizygous for the duplication, which explains their often more severe manifestations compared with heterozygous females. In this report, we describe the cases of nine individuals recently identified having the syndrome, highlighting unique and previously unreported findings of this syndrome. Specifically, we report for the first time in this syndrome, two cases with de novo duplications, three receiving prenatal diagnosis with the syndrome, and three others having atypical versions of the duplication. Among the latter, one proband has a shortened version spanning only the centromeric half of the typical duplication, while the other two cases have a nearly identical length duplication as the classical duplication, with the exception that their duplication's breakpoints are telomerically shifted by about 0.2 Mb. Finally, we shed light on two new manifestations in this syndrome, vertebral anomalies and multiple malignancies, which possibly expand the phenotypic spectrum of the syndrome. 相似文献
10.
Gabriel Duette Bonnie Hiener Hannah Morgan Fernando G. Mazur Vennila Mathivanan Bethany A. Horsburgh Katie Fisher Orion Tong Eunok Lee Haelee Ahn Ansari Shaik Rmi Fromentin Rebecca Hoh Charline Bacchus-Souffan Najla Nasr Anthony L. Cunningham Peter W. Hunt Nicolas Chomont Stuart G. Turville Steven G. Deeks Anthony D. Kelleher Timothy E. Schlub Sarah Palmer 《The Journal of clinical investigation》2022,132(7)
Despite long-term antiretroviral therapy (ART), HIV-1 persists within a reservoir of CD4+ T cells that contribute to viral rebound if treatment is interrupted. Identifying the cellular populations that contribute to the HIV-1 reservoir and understanding the mechanisms of viral persistence are necessary to achieve an effective cure. In this regard, through Full-Length Individual Proviral Sequencing, we observed that the HIV-1 proviral landscape was different and changed with time on ART across naive and memory CD4+ T cell subsets isolated from 24 participants. We found that the proportion of genetically intact HIV-1 proviruses was higher and persisted over time in effector memory CD4+ T cells when compared with naive, central, and transitional memory CD4+ T cells. Interestingly, we found that escape mutations remained stable over time within effector memory T cells during therapy. Finally, we provided evidence that Nef plays a role in the persistence of genetically intact HIV-1. These findings posit effector memory T cells as a key component of the HIV-1 reservoir and suggest Nef as an attractive therapeutic target. 相似文献