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| Lycopene is a naturally occurring carotenoid found predominantly in tomatoes and other red fruits and vegetables. Antioxidant Properties: -Lycopene is a powerful antioxidant. It helps neutralize free radicals, which can reduce oxidative stress—a factor implicated in cancer development. Possible concern about interfering with chemotherapy and radiation therapy. However this review disagrees. Inflammation Reduction: -Some studies suggest that lycopene may help lower levels of inflammation, another process linked to cancer progression At supraphysiological or extremely high concentrations, lycopene may have the potential to switch from an antioxidant to a prooxidant role -The prooxidant effect of lycopene has been observed under conditions of high oxygen tension. In vitro studies have suggested that in environments with elevated oxygen levels, lycopene might promote rather than neutralize the production of reactive oxygen species (ROS). -The presence of metal ions (such as iron or copper) in the environment can catalyze reactions where antioxidants, including lycopene, contribute to oxidative processes. These metals can interact with lycopene, potentially leading to the formation of radicals. The mevalonate pathway produces cholesterol and a variety of isoprenoids, which are important for maintaining cell membrane integrity, protein prenylation, and other essential cellular functions. -One of the primary enzymes in this pathway is HMG-CoA reductase (3-hydroxy-3-methylglutaryl-coenzyme A reductase), which is the target of statin drugs used for lowering cholesterol. Some studies suggest that lycopene might downregulate the activity of HMG-CoA reductase or other enzymes in the mevalonate pathway. By doing so, lycopene could potentially reduce the synthesis of cholesterol and isoprenoids that are necessary for rapid cell proliferation—an especially relevant aspect in cancer cells. Lycopene typically used in a 100mg/day range for cancer (inhibition of the the Melavonate Pathway) -also has antiplatelet aggregation capability. -Note half-life 16–20 days. BioAv Heat processing, especially when combined with a small amount of fat, significantly enhances lycopene’s bioaccessibility and absorption. (20% under optimal conditions) Pathways: - ROS usually goes down, but may go up or down depending on dose and environment. Lycopene may also be modified to be a "oxdiative product" which may change the behaviour. - Raises AntiOxidant defense in Normal Cells: ROS↓, NRF2↑, SOD↑, GSH↑, Catalase↑, - lowers Inflammation : NF-kB↓, COX2↓, p38↓, Pro-Inflammatory Cytokines : NLRP3↓, IL-1β↓, TNF-α↓, IL-6↓, IL-8↓ - inhibit Growth/Metastases : EMT↓, MMPs↓, MMP9↓, IGF-1↓, uPA↓, VEGF↓, ROCK1↓, FAK↓, RhoA↓, NF-κB↓, ERK↓ - reactivate genes thereby inhibiting cancer cell growth : EZH2↓, P53↑, Sp proteins↓, - cause Cell cycle arrest : TumCCA↑, cyclin D1↓, cyclin E↓, CDK2↓, CDK4↓, - inhibits Migration/Invasion : TumCMig↓, TumCI↓, TNF-α↓, FAK↓, ERK↓, EMT↓, - inhibits angiogenesis↓ : VEGF↓, HIF-1α↓, Integrins↓, - Others: PI3K↓, AKT↓, JAK↓, STAT↓, Wnt↓, β-catenin↓, AMPK, ERK↓, JNK, - SREBP (related to cholesterol). - Synergies: chemo-sensitization, chemoProtective, RadioSensitizer, RadioProtective, Others(review target notes), Neuroprotective, Cognitive, Renoprotection, Hepatoprotective, CardioProtective, - Selectivity: Cancer Cells vs Normal Cells
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| The cytochrome P450 (CYP) family includes many isoenzymes that play key roles in metabolizing endogenous substances (like hormones) and xenobiotics (including drugs and toxins). Changes in the expression of these enzymes in various cancers can affect carcinogen activation, drug metabolism, and overall tumor biology, influencing both cancer risk and prognosis. CYP1B1 – Frequently overexpressed in several cancers including breast, ovarian, prostate, and colorectal cancers. – Its expression is often low in normal tissues, making it a potential target for selective cancer therapies. 2. CYP3A4 and CYP3A5 These enzymes are highly expressed in the liver, but their expression is also observed in extrahepatic tissues. – In cancer, CYP3A enzymes can be variably expressed; for instance, CYP3A4 may be upregulated in some liver cancers but downregulated in others. 3. CYP2E1 – CYP2E1 is expressed in the liver and extrahepatic tissues. – Elevated CYP2E1 activity can lead to increased production of reactive oxygen species (ROS), contributing to DNA damage and cancer progression. 4. CYP19A1 (Aromatase) – Aromatase converts androgens to estrogens and is expressed in adipose tissue as well as in certain tumors such as breast cancer. – Its local expression in breast tumors can increase estrogen levels, promoting hormone-dependent tumor growth. 5. CYP2C Family (e.g., CYP2C8, CYP2C9, CYP2C19) – These enzymes are involved in metabolizing various drugs and are expressed in the liver and intestines. – Their expression levels can be altered in different tumor types, potentially affecting drug metabolism. CYP450 enzymes are a large family with diverse roles in cancer biology. • Their expression in cancers (e.g., CYP1B1, CYP3A4/5, CYP2E1, CYP19A1) has been linked to both the development and progression of tumors, as well as influencing responses to therapy. |
| 1711- | Lyco, | Nutritional Importance of Carotenoids and Their Effect on Liver Health: A Review |
| - | Review, | Var, | NA |
| 3268- | Lyco, | Lycopene as a Natural Antioxidant Used to Prevent Human Health Disorders |
| - | Review, | AD, | 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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