Vitamin C (Ascorbic Acid) / GLUT1 Cancer Research Results

VitC, Vitamin C (Ascorbic Acid): Click to Expand ⟱
Features:
High-dose vitamin C: Some studies have suggested that high-dose vitamin C may be effective in treating certain types of cancer, such as ovarian cancer and pancreatic cancer.
Symptoms of vitamin C deficiency include fatigue, weakness, poor wound healing, ecchymoses, xerosis, lower extremity edema, and musculoskeletal pain—most of them are often observed in end-stage cancer patients. -Vitamin C is an essential nutrient involved in the repair of tissue, the formation of collagen, and the enzymatic production of certain neurotransmitters. It is required for the functioning of several enzymes and is important for immune system function.
-Ascorbic Acid, Different levels in different Organs
Homeostasis ranging from about 0.2 mM in the muscle and heart, and up to 10 mM in the brain and adrenal gland. -(Note the Oncomagnetic success in the brain also was then under conditions of high Vitamin C)

-Ascorbic acid is an electron donor
Ascorbic Acid, can be a Pro-oxidant
"The pro-oxidative activity of ascorbic acid (Figure 2) is associated with the interaction with transition metal ions (especially iron and copper). Under conditions of high, millimolar ascorbate concentration, vitamin C catalyzes the reduction of free transition metal ions, which causes the formation of oxygen radicals."
Ascorbic Acid, formation of H2O2 (Hydrogen Peroxide)
Many studies indicate the toxicity of ascorbate to cancer cells. Much evidence indicates that the underlying phenomenon is the pro-oxidative activity of ascorbate, which induces the formation of H2O2 and oxidative stress.
"ascorbate at concentrations achieved only by i.v. administration may be a pro-drug for formation of H(2)O(2)"
-High dose VitC therapy may not be for those with kidney problems
-Oral supplement up to 10g/day?
-Direct regulator of TET↑
-caution for (G6PD-) deficient patients receiving vitamin C infusions

-Note plasma half-life 30mins to 1hr, 1.5-2hr elimination half-life.
oral BioAv water soluble, but has limitiations as 100mg yeilds 60uM/L in plasma, but 1000mg only yeilds 85uM/L. mM concentration are required for effectiveness on cancer cells. Hence why IV administration is common. Boosting HIF increases the intracellular uptake of oxidized VitC
Pathways:
- high dose induces ROS production in cancer cells. Otherwise well known antioxidant in normal cells.
- ROS↑ related: MMP↓(ΔΨm), ER Stress↑, Caspases↑, DNA damage↑, cl-PARP↑,
- Lowers AntiOxidant defense in Cancer Cells: NRF2↓, TrxR↓**, SOD↓, GSH↓ Catalase↓ HO1↓ GPx↓
- Raises AntiOxidant defense in Normal Cells: ROS↓, NRF2↑, SOD↑, GSH↑, Catalase↑,
- lowers Inflammation : NF-kB↓, COX2↓, p38↓, Pro-Inflammatory Cytokines : NLRP3↓, IL-1β↓, TNF-α↓, IL-6↓, IL-8↓
- inhibit Growth/Metastases : TumMeta↓, TumCG↓, EMT↓, MMPs↓, MMP2↓, MMP9↓, TIMP2, IGF-1↓, VEGF↓, NF-κB↓,
- reactivate genes thereby inhibiting cancer cell growth : P53↑, TET↑
- cause Cell cycle arrest : TumCCA↑, cyclin D1↓, CDK2↓,
- inhibits Migration/Invasion : TumCMig↓, TumCI↓, TNF-α↓, ERK↓, EMT↓, TET1↓,
- inhibits glycolysis /Warburg Effect and ATP depletion : HIF-1α↓, PKM2↓, cMyc↓, GLUT">GLUT1↓, LDH↓, LDHA↓, HK2↓, PFKs↓, PDKs↓, ECAR↓, GRP78↑, Glucose↓, GlucoseCon↓
- inhibits angiogenesis↓ : VEGF↓, HIF-1α↓,
- Others: PI3K↓, AKT↓, STAT↓, AMPK, ERK↓, JNK,
- Synergies: chemo-sensitization, chemoProtective, RadioSensitizer, RadioProtective, Others(review target notes), Neuroprotective, Cognitive, Hepatoprotective,

- Selectivity: Cancer Cells vs Normal Cells
Selenium supplementation may protect cells against iron-dependent cell death by supporting increased expression of selenoproteins, including GPX4, which defend against oxidative stress. Meaning it may decrease effectiveness of high dose VitC.(#4468)
GLUT1, Glucose Transporter 1: Click to Expand ⟱
Source:
Type: protein
Also known as SLC2A1
An important hallmark in cancer cells is the increase in glucose uptake. GLUT1 is an important target in cancer treatment because cancer cells upregulate GLUT1, a membrane protein that facilitates the basal uptake of glucose in most cell types, to ensure the flux of sugar into metabolic pathways.
GLUT1 is a member of the facilitated glucose transporter family and is widely expressed in various tissues, including red blood cells, brain, and cancer cells.
GLUT1 has been shown to be overexpressed in many types of tumors, including breast, lung, and colon cancer. This overexpression may contribute to the development and progression of cancer by promoting glucose uptake and energy production in cancer cells.
GLUT1 is a protein that facilitates the transport of glucose across cell membranes. GLUT1 plays a role in the regulation of glucose metabolism in diabetes.
GLUT1 plays a role in the regulation of glucose metabolism in diabetes.
GLUT1 is also known to be involved in the Warburg effect.
GLUTs are expressed 10–12-fold higher in cancer cells than in healthy tissues, especially in highly proliferative and malignant tumors.

Downregulators:
-Resveratrol: associated with reduced GLUT1 expression.
-Curcumin: downregulate GLUT1 in various cancer cell lines
-Quercetin: downregulating the expression and function of GLUT1.
-EGCG: suppress GLUT1 expression
-Berberine: linked to decreased expression or activity of GLUT1.
Scientific Papers found: Click to Expand⟱
3133- VitC,    Vitamin C supplementation had no side effect in non-cancer, but had anticancer properties in ovarian cancer cells
- in-vitro, Ovarian, NA
*SVCT-2↑, In non-cancer cells, Vit C, at a pharmacological concentration, increased SVCT2 and decreased GLUT1, while the opposite effect was noted in cancer cells.
*GLUT1↓,
SVCT-2↓,
GLUT1↑,
TumCP↓, cancer cells, Vit C, in a pharmacological dose, decreased cell proliferation through an inhibitory effect on cyclin-dependent kinase 2 (CDK2) (4.4-fold; p < 0.01), mainly due to the stimulatory effect on the expression of CDK inhibitors, p21 and P53
CDK2↓,
PARP↓, At a pharmacological dose of 1 mM, Vit C decreased PARP expression (1.5-fold; p < 0.05).
selectivity↑, it's nontoxic effects on non-cancer cells

3136- VitC,    Vitamin C uncouples the Warburg metabolic switch in KRAS mutant colon cancer
- in-vitro, Colon, SW48 - in-vitro, Colon, LoVo
ERK↓, Vitamin C induces RAS detachment from the cell membrane inhibiting ERK 1/2 and PKM2 phosphorylation.
p‑PKM2↓,
GLUT1↓, As a consequence of this activity, strong downregulation of the glucose transporter (GLUT-1) and pyruvate kinase M2 (PKM2)
Warburg↓, causing a major blockage of the Warburg effect and therefore energetic stress.
TumCD↑, Vitamin C selectively kills KRAS mutant colon cancer cells alone or in combination with cetuximab
eff↑, Remarkably, treatment of HT29, SW480 and LoVo cells with cetuximab (0,4 μM) and vitamin C (5mM) abolished cell growth in the three lines tested.
ROS↓, Interestingly, we detected that vitamin C treatment dramatically reduced intracellular ROS levels in SW480 and LoVo cells (Figure 2D),
cMyc↓, strong inhibition of c-Myc oncogene in colonospheres treated at concentrations of vitamin C as low as 100 μM

3146- VitC,    Vitamin C protects against hypoxia, inflammation, and ER stress in primary human preadipocytes and adipocytes
- in-vivo, Nor, NA
*Obesity↓, These findings indicate that Vitamin C can reduce obesity-associated cellular stress and thus provide a rationale for future investigations.
*ER Stress↓, Vitamin C prevented the increase in hypoxia (Fig. 1A–B), significantly reduced the induction of ER stress
*Inflam↓, nd ameliorated the increased expression of inflammatory genes
Hif1a↓, Vitamin C treatment for 24 and 48 h significantly reducing induction of HIF1α protein by 30–40% and VEGFA and GLUT1 mRNA by 40–80%
VEGF↓,
GLUT1↓,
GRP78/BiP↓, significantly reversing the effects of TNFα+PA pre-treatment only on GRP78 induction, by 30–40%

3145- VitC,    Vitamin C inhibits the growth of colorectal cancer cell HCT116 and reverses the glucose‐induced oncogenic effect by downregulating the Warburg effect
- in-vitro, CRC, HCT116
Warburg↓, Notably, as a potential Warburg effect inhibitor, VC suppressed cancer growth in a concentration-dependent manner and further reversed the glucose-induced oncogenic effect.
TumCG↓,
Glycolysis↓,
GlucoseCon↓, 1 h-exposure to 5 mM VC led to an almost 50% reduction in glucose consumption, ATP and lactate contents in cancer cells, with mild impact on normal cells
ATP↓,
lactateProd↓,
selectivity↑, Meanwhile, normal cell had little apparent change
GLUT1↓, (GLUT1, PKM2, and LDHA) were significantly decreased, with p-AMPK/AMPK increased and p-mTOR/mTOR decreased, consistent with the cytotoxicity on 3 kinds of cancer cells
PKM2↓,
LDHA↓,
mTOR↓,

3141- VitC,    High-dose Vitamin C inhibits PD-L1 expression by activating AMPK in colorectal cancer
- in-vitro, CRC, HCT116
Glycolysis↓, Vitamin C inhibits immune evasion by regulating glycolysis
Synergy↑, VitC suppresses tumor growth and enhances immunotherapy in combination with anti-PD-L1
PD-L1↓, We found that VitC inhibits aerobic glycolysis in HCT116 cells while also downregulating PD-L1 expression.
AMPK↑, VitC's activation of AMPK, which downregulates HK2 and NF-κB, ultimately resulting in reduced PD-L1 expression and increased T cell infiltration.
HK2↓,
NF-kB↓,
Warburg↓, Our research shows that high-dose VitC downregulating the Warburg effect, suppressing CRC growth
tumCV↓, After treatment with VitC, the cell viability of HCT116 cells significantly decreased
GLUT1↓, marked reduction in the mRNA level of glycolysis-related proteins GLUT1, PKM2, and LDHA
PKM2↓,
LDHA↓,
CD4+↑, Our research shows that high-dose VitC increases CD4+ and CD8+ T cell infiltration in tumor tissues by inhibiting PD-L1
CD8+↑,

3140- VitC,    Vitamin-C-dependent downregulation of the citrate metabolism pathway potentiates pancreatic ductal adenocarcinoma growth arrest
- in-vitro, PC, MIA PaCa-2 - in-vitro, Nor, HEK293
citrate↓, pharmacological doses of vitamin C are capable of exerting an inhibitory action on the activity of CS, reducing glucose-derived citrate levels
FASN↓, Moreover, ascorbate targets citrate metabolism towards the de novo lipogenesis pathway, impairing fatty acid synthase (FASN) and ATP citrate lyase (ACLY) expression.
ACLY↓,
LDH↓, correlated with a remarkable decrease in extracellular pH through inhibition of lactate dehydrogenase (LDH) and overall reduced glycolytic metabolism.
Glycolysis↓,
Warburg↓, Dismissed citrate metabolism correlated with reduced Warburg effectors such as the pyruvate dehydrogenase kinase 1 (PDK1) and the glucose transporter 1 (GLUT1),
PDK1 / PDPK1↓,
GLUT1↓,
LDHA↓, Reduced LDHA expression was also observed after vitamin C exposure, leading to a vast extracellular acidification rate (ECAR) reduction.
ECAR↓,
PDH↑, enhancing PDH activity
Synergy↑, Surprisingly, an impressive 85% of tumor growth inhibition is described in the combinatory treatment of vitamin C and gemcitabine in our preclinical PDAC PDX model

1067- VitC,    Vitamin C activates pyruvate dehydrogenase (PDH) targeting the mitochondrial tricarboxylic acid (TCA) cycle in hypoxic KRAS mutant colon cancer
- in-vivo, CRC, NA
PDK1 / PDPK1↓,
Hif1a↓,
GLUT1↓,
ATP↓, Vitamin C induced remarkable ATP depletion
MMP↓,

623- VitC,    The Involvement of Ascorbic Acid in Cancer Treatment
- Review, NA, NA
ROS↑,
GLUT1↓, VC may impede glucose transport and adenosine triphosphate (ATP) production
ATP↓,


Showing Research Papers: 1 to 8 of 8

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 8

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress(tgid=1) ⓘ

ROS↓, 1,   ROS↑, 1,  

Mitochondria & Bioenergetics(tgid=3) ⓘ

PDH↑, 1,  

Core Metabolism/Glycolysis(tgid=4) ⓘ

ACLY↓, 1,   AMPK↑, 1,   ATP↓, 3,   citrate↓, 1,   ECAR↓, 1,   FASN↓, 1,   GlucoseCon↓, 1,   Glycolysis↓, 3,   HK2↓, 1,   lactateProd↓, 1,   LDHA↓, 3,   PDK1 / PDPK1↓, 2,   PKM2↓, 2,   p‑PKM2↓, 1,   Warburg↓, 4,  

Cell Death(tgid=5) ⓘ

TumCD↑, 1,  

Kinase & Signal Transduction(tgid=6) ⓘ

ERK↓, 1,   mTOR↓, 1,  

Transcription & Epigenetics(tgid=7) ⓘ

cMyc↓, 1,   tumCV↓, 1,  

Protein Folding & ER Stress(tgid=8) ⓘ

GRP78/BiP↓, 1,  

DNA Damage & Repair(tgid=10) ⓘ

PARP↓, 1,  

Cell Cycle & Senescence(tgid=11) ⓘ

CDK2↓, 1,  

Proliferation, Differentiation & Cell State(tgid=12) ⓘ

TumCG↓, 1,   TumCP↓, 1,  

Angiogenesis & Vasculature(tgid=14) ⓘ

Hif1a↓, 2,   VEGF↓, 1,  

Barriers & Transport(tgid=15) ⓘ

GLUT1↓, 7,   GLUT1↑, 1,   MMP↓, 1,   SVCT-2↓, 1,  

Immune & Inflammatory Signaling(tgid=16) ⓘ

CD4+↑, 1,   CD8+↑, 1,   NF-kB↓, 1,   PD-L1↓, 1,  

Drug Metabolism & Resistance(tgid=21) ⓘ

eff↑, 1,   selectivity↑, 2,   Synergy↑, 2,  

Clinical Biomarkers(tgid=22) ⓘ

LDH↓, 1,   PD-L1↓, 1,  
Total Targets: 43

Pathway results for Effect on Normal Cells:


Protein Folding & ER Stress(tgid=8) ⓘ

ER Stress↓, 1,  

Barriers & Transport(tgid=15) ⓘ

GLUT1↓, 1,   SVCT-2↑, 1,  

Immune & Inflammatory Signaling(tgid=16) ⓘ

Inflam↓, 1,  

Functional Outcomes(tgid=23) ⓘ

Obesity↓, 1,  
Total Targets: 5

Scientific Paper Hit Count for: GLUT1, Glucose Transporter 1
8 Vitamin C (Ascorbic Acid)
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

Filter Conditions: Pro/AntiFlg:%  IllCat:%  CanType:%  Cells:%  prod#:166  Target#:566  State#:%  Dir#:%
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