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| B Vitamin supplement. Helps form red blood cells. Folic acid (vitamin B9) is converted into tetrahydrofolate (THF) and its derivatives. These folate coenzymes are essential for one‐carbon transfer reactions, which are critical for the synthesis of purines and thymidylate—key components of DNA. • Folate Deficiency and ROS: A deficiency in folic acid can exacerbate oxidative stress. Insufficient folate has been linked to increased ROS levels, which are capable of damaging cellular macromolecules, including DNA, proteins, and lipids. This oxidative DNA damage further increases mutation rates and contributes to carcinogenesis. The evidence suggests that while adequate dietary folate is important for cancer prevention (by maintaining genomic stability and proper methylation), excessive folate supplementation in individuals with undiagnosed or existing neoplasms might be problematic. -supplementation of folate may occur as folic acid, folinic acid or 5-methyltetrahydrofolate (5-MTHF). -5-MTHF also known as L-methylfolate -Naturally occurring 5-MTHF has important advantages over synthetic folic acid - it is well absorbed even when gastrointestinal pH is altered and its bioavailability is not affected by metabolic defects -Use of 5-MTHF also prevents the potential negative effects of unconverted folic acid in the peripheral circulation -Large RCT meta-analyses generally do not show a moderate increase in overall cancer incidence from folic acid during trial periods. -High-dose folic acid has a long-running concern about “timing” (before vs after neoplasia), and NIH ODS cautions against >1,000 µg/day from supplements (UL) largely due to masking B12 deficiency and risk-uncertainty contexts. -It’s best categorized as a “growth substrate / one-carbon cofactor” with high chemo-interaction relevance, not as a standalone anticancer natural product.
Time-Scale Flag (TSF): P / R / G
Chemo Interaction Mini-Table
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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. |
| 4071- | FA, | Folate and Alzheimer: when time matters |
| - | 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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