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Apigenin present in parsley, celery, chamomile, oranges and beverages such as tea, beer and wine. "It exhibits cell growth arrest and apoptosis in different types of tumors such as breast, lung, liver, skin, blood, colon, prostate, pancreatic, cervical, oral, and stomach, by modulating several signaling pathways." -Note half-life reports vary 2.5-90hrs?. -low solubility of apigenin in water : BioAv (improves when mixed with oil/dietary fat or lipid based formulations) -best oil might be MCT oils (medium-chain fatty acids) Pathways: - Often considered an antioxidant, in cancer cells it can paradoxically induce ROS production (one report that goes against most others, by lowering ROS in cancer cells but still effective) - ROS↑ related: MMP↓(ΔΨm), ER Stress↑, Ca+2↑, Cyt‑c↑, Caspases↑, DNA damage↑, UPR↑, cl-PARP↑, HSP↓ - Lowers AntiOxidant defense in Cancer Cells: NRF2↓, GSH↓ (Conflicting evidence about Nrf2) - Combined with Metformin (reduces Nrf2) amplifies ROS production in cancer cells while sparing normal cells. - Raises AntiOxidant defense in Normal Cells: NRF2↑, SOD↑, GSH↑, Catalase↑, - lowers Inflammation : NF-kB↓, COX2↓, p38↓, Pro-Inflammatory Cytokines : IL-1β↓, TNF-α↓, IL-6↓, IL-8↓ - inhibit Growth/Metastases : , MMPs↓, MMP2↓, MMP9↓, IGF-1↓, uPA↓, VEGF↓, ERK↓ - reactivate genes thereby inhibiting cancer cell growth : HDAC↓, DNMT1↓, DNMT3A↓, EZH2↓, P53↑, HSP↓ - cause Cell cycle arrest : TumCCA↑, cyclin D1↓, cyclin E↓, CDK2↓, CDK4↓, CDK6↓, - inhibits Migration/Invasion : TumCMig↓, TumCI↓, FAK↓, ERK↓, - inhibits glycolysis and ATP depletion : HIF-1α↓, PKM2↓, cMyc↓, PDK1↓, GLUT1↓, LDHA↓, HK2↓, Glucose↓, GlucoseCon↓ - inhibits angiogenesis↓ : VEGF↓, HIF-1α↓, PDGF↓, EGFR↓, Integrins↓, - inhibits Cancer Stem Cells : CSC↓, CK2↓, Hh↓, GLi↓, GLi1↓, - Others: PI3K↓, AKT↓, JAK↓, 1, 2, 3, STAT↓, 1, 2, 3, 4, 5, 6, Wnt↓, β-catenin↓, AMPK↓,, α↓,, ERK↓, 5↓, JNK↓, - Shown to modulate the nuclear translocation of SREBP-2 (related to cholesterol). - Synergies: chemo-sensitization, chemoProtective, RadioSensitizer, RadioProtective, Others(review target notes) -Ex: other flavonoids(chrysin, Luteolin, querectin) curcumin, metformin, sulforaphane, ASA Neuroprotective, Renoprotection, Hepatoprotective, CardioProtective, - Selectivity: Cancer Cells vs Normal Cells Apigenin exhibits biological effects (anticancer, anti-inflammatory, antioxidant, neuroprotective, etc.) typically at concentrations roughly in the range of 1–50 µM. Parsley microgreens can contain up to 2-3 times more apigenin than mature parsley. Apigenin is typically measured in the range of 1-10 μM for biological activity. Assuming a molecular weight of 270 g/mol for apigenin, we can estimate the following μM concentrations: 10uM*5L(blood)*270g/mol=13.5mg apigenin (assumes 100% bioavailability) then an estimated 10-20 mg of apigenin per 100 g of fresh weight parlsey 2.2mg/g of apigenin fresh parsley 45mg/g of apigenin in dried parsley (wikipedia) so 100g of parsley might acheive 10uM blood serum level (100% bioavailability) BUT bioavailability is only 1-5% (Supplements available in 75mg liposomal)( Apigenin Pro Liposomal, 200 mg from mcsformulas.com) A study had 2g/kg bw (meaning 160g for 80kg person) delivered a maximum 0.13uM of plasma concentration @ 7.2hrs. Assuming parsley is 90-95% water, then that would be ~16g of dried parsley Conclusion: to reach 10uM would seem very difficult by oral ingestion of parsley. Other quotes: “4g of dried parsley will be enough for 50kg adult” 5mg/kg BW yields 16uM, so 80Kg person means 400mg (if dried parsley is 130mg/g, then would need 3g/d) In many cancer cell lines, concentrations in the range of approximately 20–40 µM have been reported to shift apigenin’s activity from mild antioxidant effects (or negligible ROS changes) toward a clear pro-oxidant effect with measurable ROS increases. Low doses: At lower concentrations, apigenin is more likely to exhibit its antioxidant properties, scavenging ROS and protecting cells from oxidative stress. In normal cells with robust antioxidant systems, apigenin’s antioxidant effects might prevail, whereas cancer cells—often characterized by an already high level of basal ROS—can be pushed over the oxidative threshold by increased ROS production induced by apigenin. In environments with lower free copper levels, this pro-oxidant activity is less pronounced, and apigenin may tilt the balance toward its antioxidant function. |
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Poly (ADP-ribose) polymerase (PARP) cleavage is a hallmark of caspase activation.
PARP (Poly (ADP-ribose) polymerase) is a family of proteins involved in a variety of cellular processes, including DNA repair, genomic stability, and programmed cell death. PARP enzymes play a crucial role in repairing single-strand breaks in DNA. PARP has gained significant attention, particularly in the treatment of certain types of tumors, such as those with BRCA1 or BRCA2 mutations. These mutations impair the cell's ability to repair double-strand breaks in DNA through homologous recombination. Cancer cells with these mutations can become reliant on PARP for survival, making them particularly sensitive to PARP inhibitors. PARP inhibitors, such as olaparib, rucaparib, and niraparib, have been developed as targeted therapies for cancers associated with BRCA mutations. PARP Family: The poly (ADP-ribose) polymerases (PARPs) are a family of enzymes involved in a number of cellular processes, including DNA repair, genomic stability, and programmed cell death. PARP1 is the predominant family member responsible for detecting DNA strand breaks and initiating repair processes, especially through base excision repair (BER). PARP1 Overexpression: In several cancer types—including breast, ovarian, prostate, and lung cancers—elevated PARP1 expression and/or activity has been reported. High PARP1 expression in certain cancers has been associated with aggressive tumor behavior and resistance to therapies (especially those that induce DNA damage). Increased PARP1 activity may correlate with poorer overall survival in tumors that rely on DNA repair for survival. |
1548- | Api,  |   | A comprehensive view on the apigenin impact on colorectal cancer: Focusing on cellular and molecular mechanisms |
- | Review, | Colon, | NA |
1563- | Api,  | MET,  |   | Metformin-induced ROS upregulation as amplified by apigenin causes profound anticancer activity while sparing normal cells |
- | in-vitro, | Nor, | HDFa | - | in-vitro, | PC, | AsPC-1 | - | in-vitro, | PC, | MIA PaCa-2 | - | in-vitro, | Pca, | DU145 | - | in-vitro, | Pca, | LNCaP | - | in-vivo, | NA, | NA |
1536- | Api,  |   | Apigenin causes necroptosis by inducing ROS accumulation, mitochondrial dysfunction, and ATP depletion in malignant mesothelioma cells |
- | in-vitro, | MM, | MSTO-211H | - | in-vitro, | MM, | H2452 |
2640- | Api,  |   | Apigenin: A Promising Molecule for Cancer Prevention |
- | Review, | Var, | NA |
2639- | Api,  |   | Plant flavone apigenin: An emerging anticancer agent |
- | Review, | Var, | NA |
270- | Api,  |   | Apigenin induces apoptosis in human leukemia cells and exhibits anti-leukemic activity in vivo via inactivation of Akt and activation of JNK |
- | in-vivo, | AML, | U937 |
268- | Api,  |   | Induction of apoptosis by apigenin and related flavonoids through cytochrome c release and activation of caspase-9 and caspase-3 in leukaemia HL-60 cells |
- | in-vitro, | AML, | HL-60 |
243- | Api,  |   | Apigenin Attenuates Melanoma Cell Migration by Inducing Anoikis through Integrin and Focal Adhesion Kinase Inhibition |
- | in-vitro, | Melanoma, | A375 | - | in-vitro, | Melanoma, | A2058 |
242- | Api,  |   | Apigenin inhibits proliferation and invasion, and induces apoptosis and cell cycle arrest in human melanoma cells |
- | in-vitro, | Melanoma, | A375 | - | in-vitro, | Melanoma, | C8161 |
206- | Api,  |   | Inhibition of glutamine utilization sensitizes lung cancer cells to apigenin-induced apoptosis resulting from metabolic and oxidative stress |
- | in-vitro, | Lung, | H1299 | - | in-vitro, | Lung, | H460 | - | in-vitro, | Lung, | A549 | - | in-vitro, | CRC, | HCT116 | - | in-vitro, | Melanoma, | A375 | - | in-vitro, | Lung, | H2030 | - | in-vitro, | CRC, | SW480 |
180- | Api,  |   | Induction of caspase-dependent apoptosis by apigenin by inhibiting STAT3 signaling in HER2-overexpressing MDA-MB-453 breast cancer cells |
- | in-vitro, | BC, | MDA-MB-231 |
178- | Api,  |   | Autophagy inhibition enhances apigenin-induced apoptosis in human breast cancer cells |
- | in-vivo, | BC, | MDA-MB-231 | - | in-vitro, | BC, | T47D |
173- | Api,  |   | Apigenin-induced apoptosis is enhanced by inhibition of autophagy formation in HCT116 human colon cancer cells |
- | in-vitro, | Colon, | HCT116 |
586- | Api,  | 5-FU,  |   | 5-Fluorouracil combined with apigenin enhances anticancer activity through mitochondrial membrane potential (ΔΨm)-mediated apoptosis in hepatocellular carcinoma |
- | in-vivo, | HCC, | NA |
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