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| Anthocyanins — Anthocyanins (ACNs) are a structurally diverse class of water-soluble flavonoid pigments (glycosylated anthocyanidins) abundant in berries, purple/red grapes, cherries, red cabbage, and other deeply colored plants. They function as pleiotropic redox- and inflammation-modulating polyphenols with context-dependent signaling effects that can shift from antioxidant/anti-inflammatory tone at nutritionally relevant exposures to stress-signaling/pro-apoptotic effects in tumor models at higher concentrations. Classification: dietary polyphenols (flavonoids; anthocyanidin O-glycosides). Standard abbreviations: ACNs; often specified as C3G (cyanidin-3-O-glucoside) or as “total anthocyanins.” A key translation nuance is that circulating parent ACNs are typically low and transient, while phase-II conjugates and gut microbiota–derived phenolic acids (e.g., protocatechuic acid from cyanidin glycosides) plausibly mediate a meaningful fraction of systemic biology. Primary mechanisms (ranked):
Bioavailability / PK relevance: Oral bioavailability of intact parent anthocyanins is generally modest with rapid appearance and clearance; extensive phase-II metabolism (glucuronidation/sulfation/methylation) and prominent gut microbiota catabolism generate phenolic acid metabolites that may dominate systemic exposure. Local gastrointestinal exposures can be substantially higher than plasma levels, making “GI-local” mechanisms more plausible than “systemic parent-compound” mechanisms for many endpoints. In-vitro vs systemic exposure relevance: Many anticancer in-vitro studies use ~10–100+ µM parent anthocyanins/extract equivalents, which often exceed achievable circulating parent anthocyanin concentrations after dietary intake; therefore, mechanistic claims that require high micromolar parent exposure should be treated as (high concentration only) unless supported by metabolite biology or GI-local relevance. Clinical evidence status: Human evidence is strongest for cardiometabolic and inflammation-related biomarkers (multiple RCTs/meta-analyses). For cancer, evidence is predominantly preclinical and epidemiologic/biomarker-level in humans; there is no established oncology indication or regulatory approval as an anticancer drug. For cognition/brain aging, small RCTs with anthocyanin-rich foods/supplements show signal in select domains, but overall evidence remains exploratory. "Anthocyanins are a class of water‐soluble flavonoids, which show a range of pharmacological effects, such as prevention of cardiovascular disease, obesity control and antitumour activity. Their potential antitumour effects are reported to be based on a wide variety of biological activities including antioxidant; anti‐inflammation; anti‐mutagenesis; induction of differentiation; inhibiting proliferation by modulating signal transduction pathways, inducing cell cycle arrest and stimulating apoptosis or autophagy of cancer cells; anti‐invasion; anti‐metastasis; reversing drug resistance of cancer cells and increasing their sensitivity to chemotherapy."Anthocyanins are flavonoid pigments with multi-target pleiotropic effects in cancer models, primarily through modulation of ROS balance, NF-κB signaling, PI3K/Akt/mTOR inhibition, apoptosis induction, and anti-angiogenic activity. Their effects are often context-dependent and dose-dependent: low physiologic exposures tend to support antioxidant and anti-inflammatory tone, whereas higher concentrations in vitro can induce oxidative stress and apoptosis in tumor cells. They also influence tumor microenvironment dynamics including VEGF signaling, MMP activity, and inflammatory cytokines. Bioavailability is modest, and metabolites (phenolic acids) likely contribute significantly to biological effects. Evidence in humans remains supportive but not definitive. • Anthocyanins are a class of water-soluble flavonoid pigments responsible for the red, purple, and blue hues in many fruits, vegetables, and flowers (e.g., berries, red grapes, and eggplants). • Anthocyanins can effectively scavenge free radicals and reduce oxidative stress, thereby protecting cellular components like DNA, lipids, and proteins from oxidative damage—a factor linked to carcinogenesis. • Their antioxidant capacity helps in neutralizing reactive oxygen species (ROS), which can otherwise promote mutations and tumor initiation. • Anthocyanins have been shown to inhibit pro-inflammatory cytokines (e.g., TNF-α, IL-6) and enzymes (e.g., COX-2), reducing the inflammatory signals associated with cancer progression. • They may modulate pathways such as NF-κB, MAPK, and PI3K/Akt, contributing to the downregulation of genes involved in survival and proliferation of cancer cells. • Anthocyanins have been found to inhibit the formation of new blood vessels (angiogenesis) essential for tumor growth and metastatic spread. Anthocyanins: ranked cancer-relevant pathway effects
TSF legend: P: 0–30 min; R: 30 min–3 hr; G: >3 hr Anthocyanins and Alzheimer’s disease — Anthocyanin-rich foods/supplements have small-human-trial signals suggesting modest improvements in selected cognitive domains and/or brain function proxies in at-risk or impaired cohorts, plausibly mediated through vascular/inflammatory tone, oxidative stress buffering, and microbiome–metabolite signaling (rather than sustained high circulating parent anthocyanins). Overall, evidence remains exploratory and heterogeneous across preparations, doses, and endpoints. Clinical evidence status: Small RCTs/pilot trials (food-based and some purified preparations) with mixed but promising signals; not an established disease-modifying therapy. Anthocyanins: non-cancer mechanisms relevant to Alzheimer’s disease
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| In all eukaryotic cells, intracellular Ca2+ levels are maintained at low resting concentrations (approximately 100 nM) by the activity of the major Ca2+ extrusion system, the plasma membrane Ca2+-ATPase (PMCA), which exchanges extracellular protons (H+) for cytosolic Ca2+. Indeed, sustained elevation of [Ca2+]C in the form of overload, saturating all Ca2+-dependent effectors, prolonged decrease in [Ca2+]ER, causing ER stress response, and high [Ca2+]M, inducing mitochondrial permeability transition (MPT), are considered to be pro-death factors. In cancer the Ca2+-handling toolkit undergoes profound remodelling (figure 1) to favour activation of Ca2+-dependent transcription factors, such as the nuclear factor of activated T cells (NFAT), c-Myc, c-Jun, c-Fos that promote hypertrophic growth via induction of the expression of the G1 and G1/S phase transition cyclins (D and E) and associated cyclin-dependent kinases (CDK4 and CDK2). Thus, cancer cells may evade apoptosis through decreasing calcium influx into the cytoplasm. This can be achieved by either downregulation of the expression of plasma membrane Ca2+-permeable ion channels or by reducing the effectiveness of the signalling pathways that activate these channels. Such protective measures would largely diminish the possibility of Ca2+ overload in response to pro-apoptotic stimuli, thereby impairing the effectiveness of mitochondrial and cytoplasmic apoptotic pathways. Voltage-Gated Calcium Channels (VGCCs): Overexpression of VGCCs has been associated with increased tumor growth and metastasis in various cancers, including breast and prostate cancer. Store-Operated Calcium Entry (SOCE): SOCE mechanisms, such as STIM1 and ORAI1, are often upregulated in cancer cells, contributing to enhanced cell survival and proliferation. High intracellular calcium levels are associated with increased cell proliferation and migration, leading to a poorer prognosis. Calcium signaling can also influence hormone receptor status, affecting treatment responses. Increased Ca²⁺ signaling is associated with advanced disease and metastasis. Patients with higher CaSR expression may have a worse prognosis due to enhanced tumor growth and resistance to apoptosis. -Ca2+ is an important regulator of the electric charge distribution of bio-membranes. |
| 3864- | ACNs, | Anthocyanins Potentially Contribute to Defense against Alzheimer’s Disease |
| - | 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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