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| Aflavin-3,3′-digallate — also known in the tea literature as theaflavin-3,3′-digallate (TF3; TFDG; Nestronics abbrev: TFdiG) — is a galloylated theaflavin dimer polyphenol formed during oxidation/“fermentation” of tea catechins in black tea (Camellia sinensis). It is a small-molecule phytochemical (flavonoid-derived polyphenol) with prominent redox-reactive and signaling-modulatory bioactivity that is largely supported by in-vitro and limited in-vivo oncology models, with no clear clinical development path as a standalone therapeutic. Primary mechanisms (ranked):
Bioavailability / PK relevance: Oral systemic bioavailability is generally considered low for theaflavins; intestinal permeability is poor and efflux transporters contribute to limited absorption. Gallated theaflavins (including TFDG) can be unstable and are biotransformed during epithelial transport and by gut microbiota to theaflavin, mono-gallates, gallic acid, and related metabolites; therefore, local GI exposure and microbiome-derived metabolites may be more exposure-relevant than plasma parent compound. In-vitro vs systemic exposure relevance: Many mechanistic cancer studies use micromolar concentrations; given poor absorption/efflux and biotransformation, direct translation of high in-vitro parent-compound concentrations to achievable systemic exposures is uncertain (likely exceeds plasma parent exposure in typical dietary contexts). Clinical evidence status: Predominantly preclinical (cell culture + limited animal models). Human evidence is mainly for black tea/theaflavin-enriched extracts and related endpoints rather than purified TFDG as a therapeutic agent; no clear late-stage clinical program is evident for isolated TFDG. TFdiG is a type of theaflavin, which is a class of flavonoids that are unique to tea plants. Theaflavins are formed during the fermentation process of tea production, and they are responsible for the characteristic astringent taste and dark color of black tea.TFdiG is one of the most abundant theaflavins found in black tea, and it has been shown to have a range of biological activities, including anti-inflammatory, antioxidant, and anti-cancer effects. Other natural sources of TFdiG include: Black tea: TFdiG is found in high amounts in black tea, particularly in the leaves and buds of the tea plant. Green tea: TFdiG is also found in green tea, although in lower amounts than in black tea. Oolong tea: TFdiG is found in oolong tea, which is a type of tea that is partially fermented. Aflavin-3,3′-digallate is a naturally derived polyphenolic compound that has shown promise in preclinical studies through its antioxidant, apoptosis-inducing, and cell cycle-arresting effects. Its potential modulation of key oncogenic signaling pathways is an additional point of interest. However, the compound is still in the early phases of research, lacking extensive in vivo validation and clinical trial data. Mechanistic pathway map for Aflavin-3,3′-digallate (TF3 / TFDG)
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| Source: CGL-CS |
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| Mitogen-activated protein kinases (MAPKs) are a group of proteins involved in transmitting signals from the cell surface to the nucleus, playing a crucial role in various cellular processes, including growth, differentiation, and apoptosis (programmed cell death). MAPK Pathways: The MAPK family includes several pathways, the most notable being: 1.ERK (Extracellular signal-Regulated Kinase): Often associated with cell proliferation and survival. 2.JNK (c-Jun N-terminal Kinase): Typically involved in stress responses and apoptosis. 3.p38 MAPK: Associated with inflammatory responses and apoptosis. Inhibitors: Targeting the MAPK pathway has become a strategy in cancer therapy. For example, BRAF inhibitors (like vemurafenib) are used in treating melanoma with BRAF mutations. Altered Expression Levels: Overexpression: Many cancers exhibit overexpression of MAPK pathway components, such as RAS, BRAF, and MEK. This overexpression can lead to increased signaling activity, promoting cell proliferation and survival. Downregulation: In some cases, negative regulators of the MAPK pathway (e.g., MAPK phosphatases) may be downregulated, leading to enhanced MAPK signaling. The expression levels of MAPK pathway components can serve as biomarkers for cancer diagnosis, prognosis, and treatment response. For example, high levels of phosphorylated ERK (p-ERK) may indicate active MAPK signaling and poor prognosis in certain cancers. Numerous reports indicate that the MAPK pathway plays a major role in tumor progression and invasion, while inhibition of MAPK signaling reduces invasion. |
| 5333- | TFdiG, | Theaflavin-3,3′-Digallate Plays a ROS-Mediated Dual Role in Ferroptosis and Apoptosis via the MAPK Pathway in Human Osteosarcoma Cell Lines and Xenografts |
| - | vitro+vivo, | OS, | MG63 |
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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