SDH Cancer Research Results

SDH, Succinate dehydrogenase/ComplexII: Click to Expand ⟱
Source:
Type:
Succinate dehydrogenase (Complex II) plays a dual role in respiration by catalyzing the oxidation of succinate to fumarate in the mitochondrial Krebs cycle and transferring electrons from succinate to ubiquinone in the mitochondrial electron transport chain (ETC).
Scientific Papers found: Click to Expand⟱
1591- Citrate,    The biological significance of cancer: mitochondria as a cause of cancer and the inhibition of glycolysis with citrate as a cancer treatment
- Analysis, NA, NA
Glycolysis↓, but the most effective inhibitor of glycolysis, which to date has not been used to fight cancer, is citrate, citric acid itself,
PDK1↓, citrate also inhibits the pyruvate dehydrogenase enzyme complex [17],
SDH↓, citrate also inhibits the succinate dehydrogenase enzyme of Krebs cycle [19].

1576- Citrate,    Targeting citrate as a novel therapeutic strategy in cancer treatment
- Review, Var, NA
TCA↓, Citrate serves as a key metabolite in the tricarboxylic acid cycle (TCA cycle, also referred to as the Krebs cycle)
T-Cell↝, modulation of T cell differentiation
Glycolysis↓, Citrate directly suppresses both cell glycolysis and TCA.
PKM2↓, citrate also inhibits glycolysis via its indirect inhibition of PK
PFK2?, In addition, citrate can inhibit PFK2,
SDH↓, citrate can inhibit enzymes, such as succinate dehydrogenase (SDH) and pyruvate dehydrogenase (PDH), in the TCA cycle
PDH↓,
β-oxidation↓, Citrate also inhibits β-oxidation as it promotes the formation of malonyl-CoA, which decreases the mitochondrial transport of fatty acids by inhibiting carnitine palmitoyl transferase I (CPT I)
CPT1A↓,
FASN↑, citrate has a positive role in promoting fatty acid synthesis
Casp3↑,
Casp2↑,
Casp8↑,
Casp9↑,
cl‑PARP↑,
Hif1a↓, Notably, in AML cell line U937, citrate induces apoptosis in a dose- and time-dependent manner by regulating the expression of HIF-1α and its downstream target GLUT-1
GLUT1↓,
angioG↓, citrate can also inhibit angiogenesis
Ca+2↓, chelate calcium ions in tumor cells
ROS↓, The other potential mechanism involved in citrate-mediated promotion of cancer growth and proliferation may be through its ability to decrease the levels of reactive oxygen species (ROS) in tumor cells
eff↓, dual effects of citrate in tumors may depend on the concentrations of citrate treatment, and different concentrations may bring out completely opposite effects even in the same tumor.
Dose↓, citrate concentration (<5 mM) appears to boost tumor growth and expansion in lung cancer A549 cells. 10mM and higher inhibited cell growth.
eff↑, citrate combined with ultraviolet (UV) radiation caused activation of caspase-3 and -9 in tumor cells (
Mcl-1↓, citrate has also been found to downregulate Mcl-1
HK2↓, Citrate also inhibits the enzymes PFK1 and hexokinase II (HK II) in glycolysis in tumor cells
IGF-1R↓,
PTEN↑, citrate may exert its effect via activating PTEN pathway
citrate↓, In addition to prostate cancer, citrate levels are significantly decreased in blood of patients with lung, bladder, pancreas and esophagus cancers
Dose∅, daily oral administration of citrate for 7 weeks at dose of 4 g/kg/day reduces tumor growth of several xenograft tumors and increases significantly the numbers of tumor-infiltrating T cells with no significant side effects in mouse models
eff↑, combining citrate with other compounds such as celecoxib, cisplatin, and 3-bromo-pyruvate, and have generated promising results
eff↑, combination of low effective doses of 3-bromo-pyruvate (3BP) (15uM), an inhibitor of glycolysis, and citrate (3 mM) significantly depleted the proliferation capability and migratory power of the C6 glioma
eff↑, Zinc treatment could lead to citrate accumulation in malignant prostate cells, which could have therapeutic potential in clinical therapy of prostate cancer.
eff↑, synergistic efficacy mediated by citrate combined with current checkpoint blockade therapies with anti-CTLA4 and/or anti-PD1/PDL1 will develop alternative novel strategies for future immunotherapy.

188- MFrot,  MF,    Spinning magnetic field patterns that cause oncolysis by oxidative stress in glioma cells
- in-vitro, GBM, GBM115 - in-vitro, GBM, DIPG
ROS↑, both GBM and DIPG cells ROS generated by sOMF
SDH↓, Complex II succinate dehydrogenase
eff↓, antioxidant Trolox reverses the cytotoxic effect of sOMF on glioma cells indicating that ROS play a causal role in producing the effect
RPM↑, we hypothesized that the interaction of weak and intermediate strength magnetic fields with the RPM mechanism in the mitochondrial ETC can perturb the electron transfer process (MEP hypothesis) to generate superoxide.
eff↓, We observed that Helmholtz coil did not produce any significant increase in ROS at 2 and 4 h during stimulation or 2 h poststimulation in GBM and DIPG cells
eff↑, oscillating field alone is not sufficient to induce ROS and that the changing angle of the magnetic field axis is also required to achieve this effect.
eff↝, repeated pulse trains rising to and declining from the peak frequency with intervening pauses are sufficient to achieve near maximum level of increase in ROS
eff↝, One spinning magnet or three spinning magnets generate similar cellular ROS levels and the effect of variation of the stimulus off period.
Casp3↑, caspase 3 activation
eff↝, This indicates that the total amount of energy delivered to cancer cells is clearly not the determinant of the potency of stimulation. Instead, it appears that the longer Toff between stimuli of 750 ms in the 4-h stimulation, as opposed to 250 ms in
SOD↓, critical rise in superoxide in two types of human glioma cells (implies SOD capacity exceeded)
ETC↓, found support for the hypothesis that the sOMF-induced increase in ROS is likely due to perturbation of the electron transfer process in the mitochondrial electron transport chain (ETC)

184- MFrot,  MF,    Rotating Magnetic Fields Inhibit Mitochondrial Respiration, Promote Oxidative Stress and Produce Loss of Mitochondrial Integrity in Cancer Cells
- in-vitro, GBM, GBM
ROS↑, sOMF
mitResp↓, Inhibit Mitochondrial Respiration
mtDam↑, Produce Loss of Mitochondrial Integrity
Dose↝, Repeated intermittent sOMF was applied for 2 hours at a specific frequency, in the 200-300 Hz frequency range, with on-off epochs of 250 or 500 ms duration.
MMP?, ROS generation has been shown to be driven, in part, by elevated mitochondrial membrane chemiosmotic potential (ΔΨ) and ubiquinol (QH2)
OCR↓, Immediately after cessation of field rotation we observe a loss of mitochondrial integrity (labeled LMI), with a very rapid increase in O2 consumption
mt-H2O2↑, We have previously demonstrated that sOMF treatment of cells generates superoxide/hydrogen peroxide in the mitochondrial matrix
eff↓, we repeated the same experiment in the presence of Trolox, which protects thiols from ROS oxidation (47). sOMF treatment of RLM in State 3u pre-treated with Trolox (15 μM), show minimal inhibition,
SDH↓, SDH Inhibition by sOMF in State 3u RLM Is Caused by ROS Generation
Thiols↓, suggest that thiol oxidation in SDH may result from sOMF.
GSH↓, Glutathione in the mitochondrial matrix can provide some protection from ROS, but after solubilizing the mitochondria, this protection is lost and the SDH becomes more sensitive to sOMF.
TumCD↑, sOMF is highly effective at killing non-dividing GBM cell cultures,
Casp3↑, caspase-3 activation 1 h after sOMF
Casp7↑, rapid activation of caspase-3/7
MPT↑, OMF-treated cell that causes near simultaneous MPT, release of cytochrome c and other apoptosis-inducing factors, resulting in caspase-3/7 activation in these GBM cells.
Cyt‑c↑,
selectivity↑, differential sensitivity to sOMF of cancer cells over ‘normal’ cells becomes apparent. rapid increase in the reactive oxygen species (ROS) in the mitochondria to cytotoxic levels only in cancer cells, and not in normal human cortical neurons
GSH/GSSG↓, increasing GSSG/GSH ratio
ETC↓, completely arrest electron transport in isolated, respiring, rat liver mitochondria and patient derived glioblastoma (GBM)


Showing Research Papers: 1 to 4 of 4

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 4

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress ⓘ

GSH↓, 1,   GSH/GSSG↓, 1,   mt-H2O2↑, 1,   ROS↓, 1,   ROS↑, 2,   RPM↑, 1,   SOD↓, 1,   Thiols↓, 1,  

Mitochondria & Bioenergetics ⓘ

ETC↓, 2,   mitResp↓, 1,   MMP?, 1,   MPT↑, 1,   mtDam↑, 1,   OCR↓, 1,   SDH↓, 4,  

Core Metabolism/Glycolysis ⓘ

citrate↓, 1,   CPT1A↓, 1,   FASN↑, 1,   Glycolysis↓, 2,   HK2↓, 1,   PDH↓, 1,   PDK1↓, 1,   PFK2?, 1,   PKM2↓, 1,   TCA↓, 1,   β-oxidation↓, 1,  

Cell Death ⓘ

Casp2↑, 1,   Casp3↑, 3,   Casp7↑, 1,   Casp8↑, 1,   Casp9↑, 1,   Cyt‑c↑, 1,   Mcl-1↓, 1,   TumCD↑, 1,  

DNA Damage & Repair ⓘ

cl‑PARP↑, 1,  

Proliferation, Differentiation & Cell State ⓘ

IGF-1R↓, 1,   PTEN↑, 1,  

Migration ⓘ

Ca+2↓, 1,  

Angiogenesis & Vasculature ⓘ

angioG↓, 1,   Hif1a↓, 1,  

Barriers & Transport ⓘ

GLUT1↓, 1,  

Immune & Inflammatory Signaling ⓘ

T-Cell↝, 1,  

Drug Metabolism & Resistance ⓘ

Dose↓, 1,   Dose↝, 1,   Dose∅, 1,   eff↓, 4,   eff↑, 6,   eff↝, 3,   selectivity↑, 1,  
Total Targets: 49

Pathway results for Effect on Normal Cells:


Total Targets: 0

Scientific Paper Hit Count for: SDH, Succinate dehydrogenase/ComplexII
2 Citric Acid
2 Magnetic Field Rotating
2 Magnetic Fields
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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