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| Apigenin — a plant-derived flavone (4′,5,7-trihydroxyflavone) abundant in parsley/celery/chamomile and other dietary sources, often abbreviated APG (or “Api” in some indexes). It is a small-molecule polyphenol classified as a dietary phytochemical/nutraceutical candidate with broad pleiotropic signaling effects in oncology models (cell-cycle control, apoptosis, inflammatory signaling, metabolic stress, and invasion/angiogenesis programs), but with important translation constraints driven by low aqueous solubility and extensive phase-II conjugation. Primary mechanisms (ranked):
Bioavailability / PK relevance: Oral apigenin exposure is commonly limited by poor water solubility and extensive first-pass metabolism (glucuronidation/sulfation). Human data indicate circulating apigenin is largely present as conjugated metabolites, and dietary intake can yield only low (typically sub-µM) systemic levels; lipidic/self-emulsifying formulations can increase exposure in vivo (formulation-dependent). Reported half-life/kinetic parameters vary widely across studies and matrices. In-vitro vs systemic exposure relevance: Many anti-cancer in vitro studies use ~10–50+ µM apigenin, which can exceed typical achievable free aglycone systemic levels after oral intake; some effects may therefore be high-concentration or formulation-enabled rather than diet-achievable. Tissue-local exposure (GI lumen, local mucosa) may be higher than plasma, and conjugate biology may contribute (context-dependent). Clinical evidence status: Predominantly preclinical oncology evidence (cell and animal models) with limited, non-definitive human cancer interventional data; at least one pilot clinical study concept exists/has been registered (status-dependent). Strongest human evidence base is for non-cancer indications and general bioactivity rather than oncology efficacy. 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. Apigenin — cancer-relevant mechanistic pathway matrix
TSF P: 0–30 min |
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| Also known as CP32. Cysteinyl aspartate specific proteinase-3 (Caspase-3) is a common key protein in the apoptosis and pyroptosis pathways, and when activated, the expression level of tumor suppressor gene Gasdermin E (GSDME) determines the mechanism of tumor cell death. As a key protein of apoptosis, caspase-3 can also cleave GSDME and induce pyroptosis. Loss of caspase activity is an important cause of tumor progression. Many anticancer strategies rely on the promotion of apoptosis in cancer cells as a means to shrink tumors. Crucial for apoptotic function are executioner caspases, most notably caspase-3, that proteolyze a variety of proteins, inducing cell death. Paradoxically, overexpression of procaspase-3 (PC-3), the low-activity zymogen precursor to caspase-3, has been reported in a variety of cancer types. Until recently, this counterintuitive overexpression of a pro-apoptotic protein in cancer has been puzzling. Recent studies suggest subapoptotic caspase-3 activity may promote oncogenic transformation, a possible explanation for the enigmatic overexpression of PC-3. Herein, the overexpression of PC-3 in cancer and its mechanistic basis is reviewed; collectively, the data suggest the potential for exploitation of PC-3 overexpression with PC-3 activators as a targeted anticancer strategy. Caspase 3 is the main effector caspase and has a key role in apoptosis. In many types of cancer, including breast, lung, and colon cancer, caspase-3 expression is reduced or absent. On the other hand, some studies have shown that high levels of caspase-3 expression can be associated with a better prognosis in certain types of cancer, such as breast cancer. This suggests that caspase-3 may play a role in the elimination of cancer cells, and that therapies aimed at activating caspase-3 may be effective in treating certain types of cancer. Procaspase-3 is a apoptotic marker protein. Prognostic significance: • High Cas3 expression: Associated with good prognosis and increased sensitivity to chemotherapy in breast, gastric, lung, and pancreatic cancers. • Low Cas3 expression: Linked to poor prognosis and increased risk of recurrence in colorectal, hepatocellular carcinoma, ovarian, and prostate cancers. |
| 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 |
| 1560- | Api, | Apigenin as an anticancer agent |
| - | Review, | NA, | NA |
| 1553- | Api, | Role of Apigenin in Cancer Prevention via the Induction of Apoptosis and Autophagy |
| - | Review, | NA, | NA |
| 1548- | Api, | A comprehensive view on the apigenin impact on colorectal cancer: Focusing on cellular and molecular mechanisms |
| - | Review, | Colon, | NA |
| 2640- | Api, | Apigenin: A Promising Molecule for Cancer Prevention |
| - | Review, | Var, | NA |
| 2639- | Api, | Plant flavone apigenin: An emerging anticancer agent |
| - | Review, | Var, | NA |
| 2637- | Api, | Apigenin Alleviates Endoplasmic Reticulum Stress-Mediated Apoptosis in INS-1 β-Cells |
| - | in-vitro, | Diabetic, | NA |
| 2634- | Api, | Apigenin induces both intrinsic and extrinsic pathways of apoptosis in human colon carcinoma HCT-116 cells |
| - | in-vitro, | CRC, | HCT116 |
| 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 |
| 2632- | Api, | Apigenin inhibits migration and induces apoptosis of human endometrial carcinoma Ishikawa cells via PI3K-AKT-GSK-3β pathway and endoplasmic reticulum stress |
| - | in-vitro, | EC, | NA |
| 310- | Api, | Apigenin inhibits renal cell carcinoma cell proliferation |
| - | vitro+vivo, | RCC, | ACHN | - | in-vitro, | RCC, | 786-O | - | in-vitro, | RCC, | Caki-1 | - | in-vitro, | RCC, | HK-2 |
| 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 |
| 240- | Api, | The flavonoid apigenin reduces prostate cancer CD44(+) stem cell survival and migration through PI3K/Akt/NF-κB signaling |
| - | in-vitro, | Pca, | PC3 | - | in-vitro, | Pca, | CD44+ |
| 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 |
| 179- | Api, | Apigenin induces caspase-dependent apoptosis by inhibiting signal transducer and activator of transcription 3 signaling in HER2-overexpressing SKBR3 breast cancer cells |
| - | in-vitro, | BC, | SkBr3 |
| 178- | Api, | Autophagy inhibition enhances apigenin-induced apoptosis in human breast cancer cells |
| - | in-vivo, | BC, | MDA-MB-231 | - | in-vitro, | BC, | T47D |
| - | in-vitro, | BC, | BT474 |
| 173- | Api, | Apigenin-induced apoptosis is enhanced by inhibition of autophagy formation in HCT116 human colon cancer cells |
| - | in-vitro, | Colon, | HCT116 |
| 1301- | Api, | Bcl-2 inhibitor and apigenin worked synergistically in human malignant neuroblastoma cell lines and increased apoptosis with activation of extrinsic and intrinsic pathways |
| - | in-vitro, | neuroblastoma, | NA |
| 591- | Api, | doxoR, | Polyphenols act synergistically with doxorubicin and etoposide in leukaemia cell lines |
| - | in-vitro, | AML, | Jurkat | - | in-vitro, | AML, | THP1 |
| 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 |
| 584- | Api, | Cisplatin, | Apigenin potentiates the antitumor activity of 5-FU on solid Ehrlich carcinoma: Crosstalk between apoptotic and JNK-mediated autophagic cell death platforms |
| - | in-vivo, | Var, | 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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