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| Black phosphorus (BP) has attracted considerable attention in cancer research—not only as a material for bioimaging and phototherapy but also for its ability to modulate various cellular signaling pathways. Black phosphorus (BP), a two-dimensional nanomaterial, exhibits excellent light-absorption performance, high photothermal conversion efficiency, biodegradability, and large specific surface area. BP can be gradually degraded into phosphate ions under physiological conditions without biological toxicity. BP has shown great potential in the biomedical field for PTT, PDT, and SDT applications. Black phosphorus — Black phosphorus (BP) is an elemental phosphorus allotrope typically developed for oncology as a two-dimensional nanomaterial, most often as black phosphorus nanosheets or black phosphorus quantum dots. It functions primarily as a stimulus-responsive theranostic platform rather than a conventional cytotoxic drug, enabling photothermal, photodynamic, sonodynamic, cargo-delivery, and radiosensitizing strategies. Formal classification is inorganic 2D nanomaterial / nanomedicine platform. Standard abbreviations include BP, BPNSs, and BPQDs. In biomedical systems it is generally produced by exfoliation or nanofabrication from bulk black phosphorus and is valued for high surface area, strong NIR absorbance, tunable surface chemistry, and degradation toward phosphate/phosphorus oxide species. The clinically relevant framing is that most anticancer activity reported to date is platform-dependent and often requires external triggers or loaded agents rather than relying on a single intrinsic drug-like mechanism. Primary mechanisms (ranked):
Bioavailability / PK relevance: BP is not a standard oral agent. Anticancer studies usually use intratumoral, intravenous, implant/coating, hydrogel, or other local-delivery formats. Major PK constraints are rapid oxidation/degradation in oxygenated and aqueous environments, variable colloidal stability, protein-corona effects, and dependence on surface functionalization for circulation time and tumor retention. In-vitro vs systemic exposure relevance: Many in-vitro cancer studies use BP concentrations and external triggers that are not directly comparable to unformulated systemic exposure. For triggered modalities, efficacy is not purely concentration-driven because NIR light, ultrasound, radiation, or composite engineering are often required. Bare-BP cytotoxicity is generally weaker than composite or externally activated systems. Clinical evidence status: Preclinical. The oncology literature is dominated by in-vitro and rodent studies, with no established regulatory approval or routine clinical cancer deployment identified for BP nanomedicine. Current relevance is as an experimental nanoplatform and adjunct-enabling material, not as a validated human anticancer therapy. Mechanistic table
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| Glutathione (GSH) is a thiol antioxidant that scavenges reactive oxygen species (ROS), resulting in the formation of oxidized glutathione (GSSG). Decreased amounts of GSH and a decreased GSH/GSSG ratio in tissues are biomarkers of oxidative stress. Glutathione is a powerful antioxidant found in every cell of the body, composed of three amino acids: cysteine, glutamine, and glycine. It plays a crucial role in protecting cells from oxidative stress, detoxifying harmful substances, and supporting the immune system. cancer cells can have elevated levels of glutathione, which may help them survive in the oxidative environment created by the immune response and chemotherapy. This can make cancer cells more resistant to treatment. While glutathione can be obtained from certain foods (like fruits, vegetables, and meats), its absorption from supplements is debated. Some people take N-acetylcysteine (NAC) or other precursors to boost glutathione levels, but the effects on cancer prevention or treatment are still being studied. Depleting glutathione (GSH) to raise reactive oxygen species (ROS) is a strategy that has been explored in cancer research and therapy. Many cancer cells have altered redox states and may rely on GSH to survive. Increasing ROS levels can induce stress in these cells, potentially leading to cell death. Certain drugs and compounds can deplete GSH levels. For example, agents like buthionine sulfoximine (BSO) inhibit the synthesis of GSH, leading to its depletion. Cancer cells tend to exhibit higher levels of intracellular GSH, possibly as an adaptive response to a higher metabolism and thus higher steady-state levels of reactive oxygen species (ROS). "...intracellular glutathione (GSH) exhibits an astounding antioxidant activity in scavenging reactive oxygen species (ROS)..." "Cancer cells have a high level of GSH compared to normal cells." "...cancer cells are affluent with high antioxidant levels, especially with GSH, whose appearance at an elevated concentration of ∼10 mM (10 times less in normal cells) detoxifies the cancer cells." "Therefore, GSH depletion can be assumed to be the key strategy to amplify the oxidative stress in cancer cells, enhancing the destruction of cancer cells by fruitful cancer therapy." The loss of GSH is broadly known to be directly related to the apoptosis progression. |
| 1603- | Cu, | BP, | SDT, | Glutathione Depletion-Induced ROS/NO Generation for Cascade Breast Cancer Therapy and Enhanced Anti-Tumor Immune Response |
| - | in-vitro, | BC, | 4T1 | - | in-vivo, | NA, | NA |
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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