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| Sodium Selenite - is inorganic selenium in the selenite oxidation state (Se⁴⁺) Sodium selenite is produced industrially from selenium metal, which itself is obtained as a by-product of copper refining. Mechanistic distinction from Selenium: -Selenite reacts with GSH → GS–Se–SG intermediates -Generates superoxide, H₂O₂ -Exploits cancer cells’ elevated basal oxidative stress -Normal cells neutralize it more effectively (higher redox reserve) Both the uptake and processing of selenium has recently shown to be upregulated in subsets of cancer cells due to their increased expression of xCT transporter The more a tumor depends on xCT, the more toxic selenite becomes. High xCT Also Increases SSE Toxicity. High xCT increases intracellular thiols, which increases SSE chemical trapping, redox cycling, and cytotoxic impact. Sodium selenite might protect against toxicity of AgNPs. also here SSE and cancer
Table to compare Sodium Selenite to SeNPs -Sodium selenite → chemical oxidant (thiol attack → ROS shock). -SeNPs → engineered redox stressor (signaling-level control, broader window). -Selenomethionine / Se-yeast → redox buffer & selenium storage form (often protective to cancer cells, especially when oxidative stress is a therapeutic goal).
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| Cytochrome c ** The term "release of cytochrome c" ** an increase in level for the cytosol. Small hemeprotein found loosely associated with the inner membrane of the mitochondrion where it plays a critical role in cellular respiration. Cytochrome c is highly water-soluble, unlike other cytochromes. It is capable of undergoing oxidation and reduction as its iron atom converts between the ferrous and ferric forms, but does not bind oxygen. It also plays a major role in cell apoptosis. The term "release of cytochrome c" refers to a critical step in the process of programmed cell death, also known as apoptosis. In its new location—the cytosol—cytochrome c participates in the apoptotic signaling pathway by helping to form the apoptosome, which activates caspases that execute cell death. Cytochrome c is a small protein normally located in the mitochondrial intermembrane space. Its primary role in healthy cells is to participate in the electron transport chain, a process that helps produce energy (ATP) through oxidative phosphorylation. Mitochondrial outer membrane permeability leads to the release of cytochrome c from the mitochondria into the cytosol. The release of cytochrome c is a pivotal event in apoptosis where cytochrome c moves from the mitochondria to the cytosol, initiating a chain reaction that leads to programmed cell death. On the one hand, cytochrome c can promote cancer cell survival and proliferation by regulating the activity of various signaling pathways, such as the PI3K/AKT pathway. This can lead to increased cell growth and resistance to apoptosis, which are hallmarks of cancer. On the other hand, cytochrome c can also induce apoptosis in cancer cells by interacting with other proteins, such as Apaf-1 and caspase-9. This can lead to the activation of the intrinsic apoptotic pathway, which can result in the death of cancer cells. Overexpressed in Breast, Lung, Colon, and Prostrate. Underexpressed in Ovarian, and Pancreatic. |
| 5079- | SSE, | Rad, | The solvent and treatment regimen of sodium selenite cause its effects to vary on the radiation response of human bronchial cells from tumour and normal tissues |
| - | in-vitro, | Lung, | A549 | - | in-vitro, | Nor, | BEAS-2B |
| 5105- | SSE, | Sodium selenite induces apoptosis by generation of superoxide via the mitochondrial-dependent pathway in human prostate cancer cells |
| - | in-vitro, | Pca, | LNCaP |
| - | vitro+vivo, | Lung, | NA |
| 1002- | SSE, | Osi, | Adag, | Selenite as a dual apoptotic and ferroptotic agent synergizes with EGFR and KRAS inhibitors with epigenetic interference |
| - | in-vitro, | Lung, | H1975 | - | in-vitro, | Lung, | H385 |
Query results interpretion may depend on "conditions" listed in the research papers. Such Conditions may include : -low or high Dose -format for product, such as nano of lipid formations -different cell line effects -synergies with other products -if effect was for normal or cancerous cells
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