Ultrastructural Pathology最新文献

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Unconventional nucleus export and secondary necrosis of human leukemia T lymphocytes (Jurkat cells) transfected with HIV-1 LTR CAT-TAT-72: ultrastructural assessment. 转染HIV-1 LTR CAT-TAT-72的人白血病T淋巴细胞(Jurkat细胞)的非常规核输出和继发性坏死:超微结构评价
IF 1.2 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-08-31 DOI: 10.1080/01913123.2025.2545858
Jacques Gilloteaux, Etienne de Harven, John Koch
{"title":"Unconventional nucleus export and secondary necrosis of human leukemia T lymphocytes (Jurkat cells) transfected with <i>HIV-1 LTR CAT-TAT-72</i>: ultrastructural assessment.","authors":"Jacques Gilloteaux, Etienne de Harven, John Koch","doi":"10.1080/01913123.2025.2545858","DOIUrl":"https://doi.org/10.1080/01913123.2025.2545858","url":null,"abstract":"<p><p>Efficient transcriptional activation and replication of the human immunodeficiency virus (HIV-1) is dependent on Tat protein. Initial observations have shown that human leukemia T lymphocytes (Jurkat cells aka Wild type or WT) transfected with <i>HIV-1 LTR CAT TAT-72</i> plasmid as Control (CTJ) cells, and CTJ transfected by electroporation with <i>pcDNA3-pU3R-CAT-TAT-72</i> (TJ cells) showed growth and maintenance resulting in giant and small cells with accumulated corpses. The lack of fine structure in Jurkat cells and both transfected cells aimed at us to verify their respective ultrastructure modifications. Scanning and transmission electron microscopy showed evident Cajal bodies in CTJ cells compared with WT cells and revealed unconventional nucleus export of viral-associated transcripts where eruption of the nucleus envelope spilled content from the perinuclear space toward exocytosis via a lined membranous channel continuum of endoplasmic reticulum - mitochondria envelope. TJ cells grew as small and giant cells where giant cells bore virological synapses stimulating apoptogenic impetus but where cell demise included osmotic bursts mostly resulted into secondary necrosis. Jurkat transfected cells could model in vitro resilient human T lymphocytes (or other infected cells) that remain factories of expressed HIV-1 virus proteins such as Tat, secreted and captured by other cells as in viral infections and can form giant cells. Those Tat and other transcripts induced cell demise, as in vivo those HIV-1 viral proteins and traces can amplify infectivity as in AIDS, altering primary lymphoid organs and secondary lymphoid organs.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":"49 5","pages":"421-448"},"PeriodicalIF":1.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144970929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Malignant glomus tumor: a rare case with an ultrastructural study. 恶性血管球瘤:罕见病例的超微结构研究。
IF 1.2 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-04-30 DOI: 10.1080/01913123.2025.2499140
Corredor-Alonso Guillermo Ernesto, Arredondo-Ruiz Pedro, Martinez-Tlahuel Jorge Luis, Dominguez-Malagon Hugo Ricardo
{"title":"Malignant glomus tumor: a rare case with an ultrastructural study.","authors":"Corredor-Alonso Guillermo Ernesto, Arredondo-Ruiz Pedro, Martinez-Tlahuel Jorge Luis, Dominguez-Malagon Hugo Ricardo","doi":"10.1080/01913123.2025.2499140","DOIUrl":"10.1080/01913123.2025.2499140","url":null,"abstract":"<p><p>Glomangiosarcoma is an extremely rare neoplasm that represents 1% of all glomus tumors, which in turn make up 2% of soft tissue tumors. We discuss the case of a 49-year-old woman who had a slow growing tumor on the left foot dorsum which evolved over a 4-year period. Magnetic resonance imaging (MRI) was performed showing deep, partially infiltrative, heterogeneous soft tissue mass with necrosis. Tru-Cut biopsy was done with a malignant glomus tumor report. Treatment consisted of wide resection and intense rehabilitation program resulting in full-function recovery. The definitive diagnosis based on morphologic, immunohistochemical and ultrastructural studies evidenced a conventional glomus tumor with malignant areas and abrupt transition to dedifferentiated component with myxoinflammatory fibroblastic sarcoma (MIFS) features. To the best of our knowledge, this is the first case showing this kind of dedifferentiation, the ultrastructural characteristics in this study allow us to identify a very rare disease and unique differentiation.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"391-396"},"PeriodicalIF":1.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143983406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Isolated dyslipidemia triggers early kidney injury through fibrotic remodeling, subcellular lipid accumulation, and AMPK overexpression. 孤立性血脂异常通过纤维化重塑、亚细胞脂质积累和AMPK过表达引发早期肾损伤。
IF 1.2 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-10-16 DOI: 10.1080/01913123.2025.2575988
Mohamed El Fadel Ousmaal, Abderahim Gaceb, Anissa Benali, Jean Giaimis
{"title":"Isolated dyslipidemia triggers early kidney injury through fibrotic remodeling, subcellular lipid accumulation, and AMPK overexpression.","authors":"Mohamed El Fadel Ousmaal, Abderahim Gaceb, Anissa Benali, Jean Giaimis","doi":"10.1080/01913123.2025.2575988","DOIUrl":"10.1080/01913123.2025.2575988","url":null,"abstract":"<p><p>Dyslipidemia is increasingly recognized as a potential driver of chronic kidney disease, independent of other components of the metabolic syndrome. This study aimed to investigate the direct impact of isolated dyslipidemia on kidney structure and function in dyslipidemic <i>Psammomys obesus</i> (<i>P. obesus</i>). <i>P. obesus</i> animals were fed either a low-energy diet (LED) or high-energy diet (HED) for 12 weeks. Renal tissues were analyzed for fibrosis, inflammation and lipid droplet accumulation, using Masson's trichrome staining and reticulin fiber staining. Protein expression of AMPK, eNOS, and TGF-β was assessed by Western blot and densitometry analysis. The HED exerted a distinctly pronounced hyperlipidemic effect, as evidenced by increased levels of total cholesterol, LDL-C, and triglycerides, without affecting glycemia. Animals fed a HED showed significant perivascular and interstitial fibrosis, tubular atrophy, tubular necrosis, and inflammation. Lipid droplets were notably observed within podocytes in the glomeruli of dyslipidemic animals. Western blot analysis revealed increased AMPK expression and TGF-β, along with altered levels of eNOS, indicating activation of metabolic stress and fibrotic pathways in HED group. Dyslipidemic <i>P. obesus</i> display significant kidney injury marked by lipid accumulation in podocytes, AMPK overexpression, and progressive fibrosis. These results highlight the direct renal impact of dyslipidemia in the absence of other metabolic stressors.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"537-549"},"PeriodicalIF":1.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145309392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Which has a more protective effect against neuronal changes in the cingulate cortex of newborn rats of diabetic mothers: omega 3 or glutathione? 对于糖尿病母亲的新生大鼠,欧米茄3和谷胱甘肽哪一种对其扣带皮层神经元变化的保护作用更强?
IF 1.1 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-04-11 DOI: 10.1080/01913123.2025.2490161
Esraa Nafadi, Walaa Farag
{"title":"Which has a more protective effect against neuronal changes in the cingulate cortex of newborn rats of diabetic mothers: omega 3 or glutathione?","authors":"Esraa Nafadi, Walaa Farag","doi":"10.1080/01913123.2025.2490161","DOIUrl":"https://doi.org/10.1080/01913123.2025.2490161","url":null,"abstract":"<p><p>Different researches suggests that unchecked maternal hyperglycemia during pregnancy may negatively impact the offspring's neurodevelopment. Omega 3 polyunsaturated fatty acids are vital antioxidant micronutrients for neurological health. Glutathione (GSH) is an essential non-enzymatic antioxidant in mammalian cells. The study aimed to assess the possible ameliorative effect of omega3 versus GSH against the neuronal changes in the cingulate cortex of new born rats of diabetic mothers. Fifty female rats were divided randomly into 5 equal groups: Group I given saline, group II where induction of diabetes by single intraperitoneal injection of 150 mg/kg of alloxan monohydrate, group III given oral omega 3 at a dose of 300 mg/kg, group IV given intraperitoneal injections of GSH at a dose of (200 mg/kg) and group V given both omega 3 and GSH with the same routes and regimens as group III and IV throughout the whole pregnancy. The newborn of each group was collected and anaesthetized then brain specimens were extracted and processed for the light, immunohistochemical and electron microscopic studies. Group II showed marked degenerative changes in the all layers of cingulate cortex by light and electron microscopy. The cingulate cortex of group V showed the most degree of improvement in comparison to group III and IV. There was strong caspase3 immunoreaction in group II while weak reaction appeared with group III, IV and V. We concluded that the combined administration of omega 3 and GSH mitigate the adverse effects of maternal diabetes on the newborn's cingulate cortex.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":"49 3","pages":"243-256"},"PeriodicalIF":1.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144035001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient isolation and characterization of Serum-Derived Exosomes: evaluating ultracentrifugation and Total Exosome Isolation Reagent based precipitation. 血清衍生外泌体的高效分离和表征:评估超离心和基于沉淀的总外泌体分离试剂。
IF 1.1 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-05-25 DOI: 10.1080/01913123.2025.2507698
Ranjana Bharti, Munish Kumar, Veena Devi, Asha Rao, Ashish Aggarwal, Tulika Gupta
{"title":"Efficient isolation and characterization of Serum-Derived Exosomes: evaluating ultracentrifugation and Total Exosome Isolation Reagent based precipitation.","authors":"Ranjana Bharti, Munish Kumar, Veena Devi, Asha Rao, Ashish Aggarwal, Tulika Gupta","doi":"10.1080/01913123.2025.2507698","DOIUrl":"10.1080/01913123.2025.2507698","url":null,"abstract":"<p><p>Exosomes are extracellular vesicles that carry biomolecular cargos such as proteins, lipids, RNA, and DNA. These molecules play crucial roles in cell-to-cell communication and are involved in various physiological and pathological processes. Due to their potential as biomarkers for disease diagnosis and prognosis, research has increasingly focused on developing more efficient methods for their isolation and characterization. In this study, blood samples were collected from 30 participants, and serum was subsequently isolated. Serum-derived exosomes (SDEs) were extracted using ultracentrifugation (UC) as well as the Total Exosome Isolation Reagent. Modifications to the UC method were implemented to improve yield and purity, and a detailed description of the method is also provided. The exosomes were characterized by Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Dynamic Light Scattering (DLS), and Western Blotting (WB) to evaluate their size, morphology, and protein content. The exosome yields from both isolation methods were evaluated using the BCA assay. Protein estimation suggested that the Total Exosome Isolation Reagent produced exosome concentrations that were 10-fold higher compared to those obtained through ultracentrifugation. Morphological analysis showed that exosomes exhibited circular, spherical, and irregular shapes, with diameters ranging from 30 to 200 nm. Western Blotting confirmed the presence of exosomal markers (TSG101, ALIX, LAMP2, and CD63) in the SDEs. In conclusion, both ultracentrifugation and the Total Exosome Isolation Reagent effectively isolate SDEs. Thus, although both methods are viable, modified ultracentrifugation is the preferred choice for applications due to its cost-effectiveness and suitability for achieving pure protein yields.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"340-353"},"PeriodicalIF":1.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144143606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A primary renal neuroendocrine tumor presenting in a fifty-five-year-old woman: a report of a rare entity. 原发性肾神经内分泌肿瘤呈现在一个55岁的妇女:一个罕见的实体报告。
IF 1.1 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-06-18 DOI: 10.1080/01913123.2025.2520217
Rodney E Shackelford, Ardenne Martin, Charu Shastri, Muhammad Tahir, Guillermo A Herrera, Christopher E Keel, Carlina Medelaire
{"title":"A primary renal neuroendocrine tumor presenting in a fifty-five-year-old woman: a report of a rare entity.","authors":"Rodney E Shackelford, Ardenne Martin, Charu Shastri, Muhammad Tahir, Guillermo A Herrera, Christopher E Keel, Carlina Medelaire","doi":"10.1080/01913123.2025.2520217","DOIUrl":"10.1080/01913123.2025.2520217","url":null,"abstract":"<p><p>Primary renal neuroendocrine tumors are very rare neoplasms compared to neuroendocrine tumors from other anatomic locations, such as the thoracic and gastrointestinal tract regions. Typically, renal neuroendocrine tumors are well-differentiated, carry a good prognosis, are often larger at presentation than neuroendocrine tumors found at other anatomic locations, and lack the clinical manifestations characteristic of neuroendocrine tumors found at other anatomic sites. Due to the rarity of these tumors, their origins, behavior, and molecular-genetic features are yet poorly defined. Here we describe a case of a well-differentiated primary renal tumor in a 55-year-old woman.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"384-390"},"PeriodicalIF":1.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recent trends in the causation of peritoneal mesothelioma: fiber burden analysis of ten cases. 腹膜间皮瘤病因的最新趋势:10例纤维负荷分析。
IF 1.1 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-03-26 DOI: 10.1080/01913123.2025.2483226
Victor L Roggli, Stasha Novakovic, Andrew J Ghio, Huihua Li, Sergio Pina-Oviedo, John M Carney, Thomas A Sporn, Carolyn H Glass, Elizabeth N Pavlisko
{"title":"Recent trends in the causation of peritoneal mesothelioma: fiber burden analysis of ten cases.","authors":"Victor L Roggli, Stasha Novakovic, Andrew J Ghio, Huihua Li, Sergio Pina-Oviedo, John M Carney, Thomas A Sporn, Carolyn H Glass, Elizabeth N Pavlisko","doi":"10.1080/01913123.2025.2483226","DOIUrl":"10.1080/01913123.2025.2483226","url":null,"abstract":"<p><p>Mesothelioma in the past has been strongly associated with a history of asbestos exposure. Studies have shown that, on average, a higher dose of asbestos exposure is required for the development of peritoneal mesothelioma, and a smaller percentage of cases are asbestos related. Non-asbestos-related causes have been reported, including prior therapeutic radiation, genetic predisposition, and chronic inflammation (e.g. Crohn disease, endometriosis, ventriculo-peritoneal shunts, and diverticulitis). Cases in children have also been reported. Recent studies have shown a decreasing trend in fiber burdens and percentage of asbestos-related mesotheliomas, with similar observations in epidemiological studies. We performed fiber burden analysis on lung tissue in 10 cases (six men, four women) of peritoneal mesothelioma since 2010. Fiber analysis was performed using the sodium hypochlorite digestion technique, with asbestos body concentrations determined by light microscopy. Fiber concentrations and types were determined by scanning electron microscopy. The median age for the six men was 62 years (range: 53-75 years). Three cases were epithelioid type and three were biphasic. Two of six cases (33%) had an elevated lung fiber burden, with one case exclusively crocidolite and the other predominately amosite. The median age for the four women was 55 years (range: 39-63 years). Two cases were epithelioid type and two were biphasic. None of the four had an elevated lung fiber burden. Our findings are consistent with contemporary epidemiological studies indicating that a minority of peritoneal mesotheliomas occurring in men are asbestos related and very few are asbestos related in women.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"288-295"},"PeriodicalIF":1.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143721349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Understanding glioma pathogenesis through ultrastructural analysis. 通过超微结构分析了解胶质瘤的发病机制。
IF 1.2 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-09-11 DOI: 10.1080/01913123.2025.2558625
Muhammad Sulman, John Paul Aboubechara, Mones S Abu-Asab, Orwa Aboud
{"title":"Understanding glioma pathogenesis through ultrastructural analysis.","authors":"Muhammad Sulman, John Paul Aboubechara, Mones S Abu-Asab, Orwa Aboud","doi":"10.1080/01913123.2025.2558625","DOIUrl":"10.1080/01913123.2025.2558625","url":null,"abstract":"<p><p>Gliomas arise from glial cells and make up to 85% of malignant brain tumors, with an average survival of only 15 months for glioblastoma. Advances in our understanding of glioma pathogenesis and treatment require a critical analysis of the tumor ultrastructure and its microenvironment. Ultrastructural analysis (UA) using high-resolution electron microscopy enables crucial insights into the cellular and subcellular characteristics of gliomas, revealing organelle abnormalities and confirming molecular alterations. We focus on recent developments in our understanding of the ultrastructural pathology of gliomas that show the abundance of lipids found in both intracellular and extracellular environments. These lipid changes are associated with aberrant structures of mitochondria and even the disappearance of cellular membranes. Significant disruptions were also noted in tumors' blood vessels and intriguing details emerged about neovascularization and the atypical content and structure of vessel walls. In a typical display of mimicry, tumor cells replaced endothelial cells on the luminal wall of the vessels. Recent UA findings also detected multinucleated giant cells in high prevalence with the presence of extrachromosomal DNA in the microenvironment. Finally, we provide an overview of the implications of UA findings regarding future research, diagnostic modalities, and therapeutic options.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"528-536"},"PeriodicalIF":1.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145034131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of intermittent fasting on high fat diet induced neuronal changes in rat hippocampus proper: molecular, histological and immunohistochemical study. 间歇性禁食对高脂饮食诱导大鼠海马区神经元变化的影响:分子、组织学和免疫组织化学研究
IF 1.2 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-10-21 DOI: 10.1080/01913123.2025.2569864
Amal T Abou Elghait, Aya A Abdelfattah, Tahany Abbass Abdullah, Nashwa Maghreby, Rehab M Thabet, Esam Omar Kamel
{"title":"Effects of intermittent fasting on high fat diet induced neuronal changes in rat hippocampus proper: molecular, histological and immunohistochemical study.","authors":"Amal T Abou Elghait, Aya A Abdelfattah, Tahany Abbass Abdullah, Nashwa Maghreby, Rehab M Thabet, Esam Omar Kamel","doi":"10.1080/01913123.2025.2569864","DOIUrl":"10.1080/01913123.2025.2569864","url":null,"abstract":"<p><p>Recent research indicates that adolescence is a time when adolescent mice are more susceptible to the effects of a short-term high-fat diet (HFD) on hippocampus-dependent learning and memory processes. Furthermore, a major characteristic in HFD-induced obesity is the development of inflammation. \"intermittent fasting\" (IF) promotes cellular and molecular Noplasticity. To investigate how rat hippocampal neuronal alterations brought on by (HFD) improved by (IF). The Department of Medical Histology at South Valley University's Faculty of Medicine was the site of this experiment. There were sixty male Wistar albino rats (<i>n</i> = 15) split up into four equal groups.GroupӀ was given a regular diet(24 weeks); GroupӀӀ was given HFD (24 weeks); GroupӀӀӀ was exposed to an IF regimen; and GroupӀV was fed on HFD (24 weeks) followed by (8 weeks) of IF regimen. The hippocampus from rats of all groups was dissected, fixed, sectioned then stained by; Hx&E, gallocyanin, immunohistochemical procedures for light microscope examination and ultrasections made for electron microscope examination. Real Time PCR using Nrf2 primer carried out. This study reported that the IF ameliorated the HFD-induced neuronal structural changes of hippocampus. In addition, the IF improved the neuronal oxidative stress through activation of Nrf2 signaling pathway. Also it improved neuronal functional deterioration revealed by increasing the expression of 5HT and decreasing the expression of astrocytes number. Conclusions: IF could be used as a novel and safe method for ameliorating the HFD- induced neuronal changes by modulating the Nrf2 signaling pathway.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"475-499"},"PeriodicalIF":1.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145347605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Protection against vancomycin-associated nephrotoxicity by zileuton: role of mitochondria revealed by electron microscopic study. zileuton对万古霉素相关肾毒性的保护作用:电镜研究揭示线粒体的作用。
IF 1.2 4区 医学
Ultrastructural Pathology Pub Date : 2025-01-01 Epub Date: 2025-08-05 DOI: 10.1080/01913123.2025.2541667
Cole S Hudson, Yongqi Xiao, Vincent H Tam, Luan D Truong
{"title":"Protection against vancomycin-associated nephrotoxicity by zileuton: role of mitochondria revealed by electron microscopic study.","authors":"Cole S Hudson, Yongqi Xiao, Vincent H Tam, Luan D Truong","doi":"10.1080/01913123.2025.2541667","DOIUrl":"10.1080/01913123.2025.2541667","url":null,"abstract":"<p><p>Vancomycin is commonly used to treat drug-resistant bacterial infections despite its potential to cause nephrotoxicity. We previously showed that zileuton can reduce vancomycin nephrotoxicity, but the intracellular mechanism(s) are not fully understood. The objective of this study was to improve our understanding of the mechanisms of nephroprotection by zileuton. Sprague-Dawley rats were administered vancomycin (200 mg/kg/day) and zileuton (4 mg/kg/day) for 3 days. Blood samples were collected to determine serum creatinine concentration. Kidneys were collected for morphologic study including comprehensive electron microscopic examination. Treatment with vancomycin alone resulted in doubling of serum creatinine. Significant tubular cell injury was noted by light microscopy. Electron microscopy further defined the nature of tubular cell injury including tubular cell necrosis, cytoplasmic vacuolization, endoplasmic reticulum dilation, and aggregation of granular/fibrillary material. Distinct mitochondrial changes included swelling, appearance of crowded/disorganized cristae, punctuated electron dense matrices, and large lysosomes containing substructures consistent with abnormal mitochondria. These changes were markedly attenuated with adjuvant zileuton. Our findings indicate that mitochondrial injury is a major mechanism of vancomycin-associated nephrotoxicity, and restoration of mitochondrial morphology is associated with nephroprotection by zileuton. These findings would be valuable for nephroprotective strategies to reduce vancomycin-associated nephrotoxicity, allowing optimal vancomycin use to treat bacterial infections.</p>","PeriodicalId":23430,"journal":{"name":"Ultrastructural Pathology","volume":" ","pages":"414-420"},"PeriodicalIF":1.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13094467/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144785376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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