iodine / TumCI Cancer Research Results

iod, iodine: Click to Expand ⟱
Features:
Iodine deficiency can lead to thyroid enlargement (goiter) and hypothyroidism. In severe cases, longstanding iodine deficiency has been linked to an increased risk of developing certain thyroid disorders, including thyroid nodules and, less frequently, thyroid cancer.

-Preliminary clinical research have suggested that molecular iodine may have antioxidant properties, modulate cell differentiation, and even exert antiproliferative effects in certain tissues.
-"antineoplasic effect of I(2) in mammary cancer involves the intracellular formation of 6-IL. Mammary cancer cells are known to contain high concentrations of AA, which might explain why I(2) exerts apoptotic effects at lower concentrations only in tumoral cells."ref

Iodine — an essential halogen trace element required for thyroid-hormone synthesis and present biologically mainly as iodide (I−). For cancer-related research, the chemically distinct form with the strongest non-radioactive experimental evidence is molecular iodine (I2), whereas iodide and radioactive iodine (especially 131I) have substantially different pharmacology and therapeutic roles. Iodine is formally classified as an essential micronutrient/trace element; standard abbreviations include I, I− for iodide, I2 for molecular iodine, and 131I for radioactive iodine. Dietary iodine originates principally from iodized salt, seafood, dairy products, seaweed, and supplements. Molecular I2 has demonstrated antiproliferative and adjuvant effects particularly in mammary/breast cancer models, but this should not be generalized to ordinary dietary iodide.

Primary mechanisms (ranked):

  1. Formation of antineoplastic iodolipids, particularly 6-iodolactone from arachidonic acid, with subsequent PPARγ activation and differentiation/apoptotic signaling.
  2. Induction of mitochondrial apoptosis through mitochondrial membrane depolarization, Bax activation, Bcl-2 suppression, thiol depletion, and apoptosis-inducing factor signaling.
  3. Antiproliferative and cell-cycle effects, with preferential effects reported in mammary cancer cells relative to normal mammary cells at moderate I2 concentrations.
  4. Chemosensitization, including suppression of Bcl-2/MDR-related chemoresistance phenotypes and increased responsiveness to anthracycline-containing chemotherapy.
  5. Suppression of angiogenic and invasive signaling, including reductions in VEGF, vascular density, uPA, EMT-associated phenotypes, and invasive capacity in breast-cancer models.
  6. Modulation of the tumor immune microenvironment, including increased Th1-associated signaling, IFNγ/T-BET expression and immune-cell infiltration with suppression of TGF-β signaling in human breast tumors.
  7. Redox modulation: molecular iodine can perturb tumor-cell thiol/redox homeostasis and mitochondrial signaling while also showing antioxidant effects in some normal tissues and in-vivo models; the direction is strongly context-dependent.

Bioavailability / PK relevance: Dietary iodide is efficiently absorbed and distributed extracellularly, with substantial thyroid uptake through the sodium/iodide symporter and predominant renal elimination. Molecular I2 behaves differently from iodide in mammary tissue: experimental breast-cancer cells can take up I2 through a mechanism largely independent of NIS and incorporate iodine into lipids and proteins. The human breast-cancer studies used approximately 5 mg/day molecular I2, substantially above ordinary nutritional requirements and above the 1.1 mg/day adult tolerable upper intake level established for routine dietary exposure. Therefore anticancer-dose I2 should not be equated with nutritional iodine supplementation.

In-vitro vs systemic exposure relevance: Many mechanistic breast-cancer experiments use approximately 10–200 µM molecular I2, including 200 µM in chemoresistance experiments. Direct equivalence between these culture concentrations and plasma iodine concentrations after oral dosing is not established because I2 is chemically reactive, undergoes reduction and organification, and can generate tissue-localized iodolipids. Consequently, high-concentration in-vitro observations should not be assumed to represent achievable systemic free-I2 exposure. Human evidence instead comes from oral dosing of 5 mg/day I2 and tumor-tissue endpoints.

Clinical evidence status: Small human randomized/Phase II breast-cancer evidence plus substantial preclinical evidence. A randomized pilot study using 5 mg/day molecular I2 alone or with FEC/TE chemotherapy reported increased tumor responses, apoptosis and immune infiltration and reduced chemoresistance/toxicity signals, but the study was small and requires independent confirmation. ClinicalTrials.gov NCT03688958 remains listed with unknown status and has not been updated since 2018. Molecular iodine is not an established standard anticancer therapy. Separately, radioactive 131I is an established, regulated treatment for iodine-avid differentiated thyroid carcinoma; this is a fundamentally different therapeutic modality and should not be interpreted as evidence for non-radioactive iodine supplementation.

Iodine Cancer-Relevant Mechanisms

Rank Pathway / Axis Cancer Cells Normal Cells Primary Effect Notes / Interpretation
1 Iodolipid formation / 6-iodolactone / PPARγ ↑ 6-iodolactone; ↑ PPARγ; ↓ PPARα Lower 6-iodolactone formation reported in normal mammary tissue Antiproliferation, differentiation and apoptosis Central proposed mechanism for molecular I2 in mammary cancer. Tumor enrichment in arachidonic acid may favor local formation of 6-iodolactone.
2 Mitochondrial apoptosis / Bax / Bcl-2 / AIF ↑ Bax; ↓ Bcl-2; ↓ mitochondrial membrane potential; ↑ AIF nuclear translocation; ↑ apoptosis Less apoptosis at moderate concentrations; apoptosis can occur at higher concentrations Selective mitochondrial cell death Molecular iodine can initiate caspase-dependent or caspase-independent apoptosis depending on model and experimental conditions.
3 Proliferation / cell cycle ↓ proliferation; ↑ cell-cycle arrest; ↑ apoptosis ↑ G1 and G2/M arrest at moderate I2 exposure; apoptosis primarily at higher exposure Growth suppression Preferential tumor-cell cytotoxicity has been demonstrated in mammary models, but selectivity is concentration-dependent.
4 Chemosensitization / drug resistance ↓ Bcl-2; ↓ MDR-associated phenotype; ↑ doxorubicin retention; ↑ chemotherapy response Potential ↓ chemotherapy-associated tissue injury (model-dependent) Reduced chemoresistance Supported by breast-cancer cell, rodent, canine and small human studies; strongest evidence concerns anthracycline-containing regimens.
5 Angiogenesis / VEGF / uPA ↓ VEGF; ↓ vascular density; ↓ uPA Not established Antiangiogenic activity Demonstrated primarily in experimental mammary tumors.
6 EMT / invasion ↓ invasive phenotype; ↓ chemoresistant stem-like populations; ↓ EMT-associated phenotype Not established Reduced invasion and progression Observed particularly in doxorubicin-resistant breast-cancer models and human tumor analyses.
7 Tumor immune response / Th1 / IFNγ / TGF-β ↑ T-BET; ↑ IFNγ; ↑ Th1/Th17-associated signaling; ↑ B-cell infiltration; ↓ TGF-β Not established Shift toward antitumor immune activity Human tumor transcriptomic findings from the molecular-I2 breast-cancer study; clinical significance remains incompletely established.
8 Redox / cellular thiols / ROS ↓ cellular thiols; altered ROS signaling; ↑ mitochondrial stress (context-dependent) Antioxidant effects reported in several tissues; oxidative toxicity possible at high exposure Redox-dependent apoptosis and tissue protection Iodine should not be classified simply as either a ROS inducer or antioxidant. Redox direction depends on chemical form, dose, tissue and baseline oxidative state.
9 I2 uptake / NIS independence ↑ I2 uptake and incorporation into lipids/proteins; largely NIS-independent in mammary cells Lower uptake/retention in some normal-cell models Enables tissue-localized iodine signaling Distinct from iodide uptake through NIS and important when interpreting molecular-I2 studies.
10 Clinical Translation Constraint Human signal demonstrated primarily in breast cancer Excess iodine can cause thyroid dysfunction Limits generalization and unsupervised high-dose use Human I2 studies used 5 mg/day, above the routine adult dietary upper intake level. Susceptible individuals may develop iodine-induced hypothyroidism or hyperthyroidism. Evidence outside breast cancer is predominantly preclinical, and recent prostate models show potentially mixed anti- and pro-neoplastic effects.


TumCI, Tumor Cell invasion: Click to Expand ⟱
Source:
Type:
Tumor cell invasion is a critical process in cancer progression and metastasis, where cancer cells spread from the primary tumor to surrounding tissues and distant organs. This process involves several key steps and mechanisms:

1.Epithelial-Mesenchymal Transition (EMT): Many tumors originate from epithelial cells, which are typically organized in layers. During EMT, these cells lose their epithelial characteristics (such as cell-cell adhesion) and gain mesenchymal traits (such as increased motility). This transition is crucial for invasion.

2.Degradation of Extracellular Matrix (ECM): Tumor cells secrete enzymes, such as matrix metalloproteinases (MMPs), that degrade the ECM, allowing cancer cells to invade surrounding tissues. This degradation facilitates the movement of cancer cells through the tissue.

3.Cell Migration: Once the ECM is degraded, cancer cells can migrate. They often use various mechanisms, including amoeboid movement and mesenchymal migration, to move through the tissue. This migration is influenced by various signaling pathways and the tumor microenvironment.

4.Angiogenesis: As tumors grow, they require a blood supply to provide nutrients and oxygen. Tumor cells can stimulate the formation of new blood vessels (angiogenesis) through the release of growth factors like vascular endothelial growth factor (VEGF). This not only supports tumor growth but also provides a route for cancer cells to enter the bloodstream.

5.Invasion into Blood Vessels (Intravasation): Cancer cells can invade nearby blood vessels, allowing them to enter the circulatory system. This step is crucial for metastasis, as it enables cancer cells to travel to distant sites in the body.

6.Survival in Circulation: Once in the bloodstream, cancer cells must survive the immune response and the shear stress of blood flow. They can form clusters with platelets or other cells to evade detection.

7.Extravasation and Colonization: After traveling through the bloodstream, cancer cells can exit the circulation (extravasation) and invade new tissues. They may then establish secondary tumors (metastases) in distant organs.

8.Tumor Microenvironment: The surrounding microenvironment plays a significant role in tumor invasion. Factors such as immune cells, fibroblasts, and signaling molecules can either promote or inhibit invasion and metastasis.
Scientific Papers found: Click to Expand⟱
7686- iod,    Molecular Iodine Exhibited Differential Antiproliferative Actions in Progenitor and Stem Populations from Chemoresistant Cancer Cells
- vitro+vivo, BC, MCF7
PPARγ↑, Apoptosis↑, Bax:Bcl2↑, CSCs↓, NRF2↑, tumCV↓, TumCI↓,
7682- iod,    Molecular Iodine Induces Anti- and Pro-Neoplastic Effects in Prostate Cancer Models
- in-vitro, Pca, LNCaP - in-vitro, Pca, DU145 - in-vitro, Pca, PC3
PPARγ↑, antiNeop↑, TumCD↑, TumCI↓, AntiCan⇅, antiOx↑, Inflam↓, Apoptosis↑, tumCV↓,
7672- iod,    Adjuvant Effect of Molecular Iodine in Conventional Chemotherapy for Breast Cancer. Randomized Pilot Study
- Trial, BC, NA
Dose↝, OS↑, TumCI↓, Apoptosis↑, EstroRS/ERS↑, eff↑, *cardioP↑, *antiOx↑, *Inflam↓,

Showing Research Papers: 1 to 3 of 3

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 3

Pathway results for Effect on Cancer / Diseased Cells:


Redox & Oxidative Stress(tgid=1) ⓘ

antiOx↑, 1,   NRF2↑, 1,  

Core Metabolism/Glycolysis(tgid=4) ⓘ

PPARγ↑, 2,  

Cell Death(tgid=5) ⓘ

Apoptosis↑, 3,   Bax:Bcl2↑, 1,   TumCD↑, 1,  

Transcription & Epigenetics(tgid=7) ⓘ

tumCV↓, 2,  

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

CSCs↓, 1,  

Migration(tgid=13) ⓘ

TumCI↓, 3,  

Immune & Inflammatory Signaling(tgid=16) ⓘ

Inflam↓, 1,  

Hormonal & Nuclear Receptors(tgid=20) ⓘ

EstroRS/ERS↑, 1,  

Drug Metabolism & Resistance(tgid=21) ⓘ

Dose↝, 1,   eff↑, 1,  

Clinical Biomarkers(tgid=22) ⓘ

EstroRS/ERS↑, 1,  

Functional Outcomes(tgid=23) ⓘ

AntiCan⇅, 1,   antiNeop↑, 1,   OS↑, 1,  
Total Targets: 17

Pathway results for Effect on Normal Cells:


Redox & Oxidative Stress(tgid=1) ⓘ

antiOx↑, 1,  

Immune & Inflammatory Signaling(tgid=16) ⓘ

Inflam↓, 1,  

Functional Outcomes(tgid=23) ⓘ

cardioP↑, 1,  
Total Targets: 3

Scientific Paper Hit Count for: TumCI, Tumor Cell invasion
3 iodine
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#:310  Target#:324  State#:%  Dir#:%
  wNotes=0  sortOrder:rid,rpid

 

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