The onset of lipid peroxidation within cellular membranes is associated with changes in their physiochemical properties and enzymatic dysfunction of the membrane environment. There are increasing bodies of evidence indicating that aldehydic molecules generated endogenously during the process of lipid peroxidation are causally involved in most of the pathophysiological effects associated with oxidative stress in cells and tissues. 4-Hydroxy-2-nonenal (4-HNE), among them, is believed to be largely responsible for cytopathological effects observed during oxidative stress in vivo and has achieved the status of one of the best recognized and most studied of the cytotoxic products of lipid peroxidation. Here, we reported that 4-HNE treatment may induce cell death in MG63 human osteosarcoma cells. The 4-HNE treatment could activate caspase-3 and alter the Bax/Bcl-2 apoptotic signaling. All these changes are due to the inhibition of AKT activity by 4-HNE treatment, and we also found that the p70S6K activity, downstream factors of AKT, was also blocked by 4-HNE. Our results revealed the molecular mechanism of how 4-HNE induces cell death in MG63 human osteosarcoma cells, which contributes to the clinical treatment of cancer therapy.
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http://dx.doi.org/10.1155/2014/873525 | DOI Listing |
BMJ Case Rep
January 2025
Pathology and Lab Medicine, AIIMS Jodhpur, Jodhpur, Rajasthan, India.
Myoepithelial tumours are rare and distinct entities with uncertain histogenesis. They occur primarily in major salivary glands and soft tissue around the head and neck. Bony involvement predominantly occurs in facial bones.
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January 2025
Division of Hematology and Oncology, University of California San Francisco, San Francisco, California, USA
Secretion of beta human chorionic gonadotropin (β-hCG) is a rare, recently recognised paraneoplastic syndrome. Herein, we present a case of a woman in her 30s with right femur conventional high-grade osteosarcoma and a positive screening urine pregnancy test. Subsequent workup failed to reveal an intrauterine or extrauterine pregnancy.
View Article and Find Full Text PDFBiomed Phys Eng Express
January 2025
Xi'an Jiaotong University, No.28 Xianning West Road, Xi'an, Shaanxi 710049, P.R. China, Xi'an, 710049, CHINA.
The optimal method for three-dimensional thermal imaging within cells involves collecting intracellular temperature responses while simultaneously obtaining corresponding 3D positional information. Current temperature measurement techniques based on the photothermal properties of quantum dots face several limitations, including high cytotoxicity and low fluorescence quantum yields. These issues affect the normal metabolic processes of tumor cells.
View Article and Find Full Text PDFBMJ Open
December 2024
Department of Applied Health Sciences, School of Health Sciences, College of Medicine and Health, University of Birmingham, Birmingham, UK.
Introduction: Ewing sarcoma is a rare paediatric cancer. Currently, there is no way of accurately predicting these patients' survival at diagnosis. Disease type (ie, localised disease, lung/pleuropulmonary metastases and other metastases) is used to guide treatment decisions, with metastatic patients generally having worse outcomes than localised disease patients.
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January 2025
Department of Medical Physiology, Texas A&M College of Medicine, Bryan, TX, 77807, USA.
Osteosarcoma (OS) is the most common primary bone malignancy. The canonical Wnt inhibitor Dickkopf-1 (Dkk-1) has been implicated in bone destruction, tumor survival and metastases during OS. We examined the role of Dkk-1 in OS disease progression and explored strategies for targeting its activity.
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