Phenethyl isothiocyanate / lipid-P Cancer Research Results

PEITC, Phenethyl isothiocyanate: Click to Expand ⟱

Features:

Phenethyl isothiocyanate (PEITC) is a naturally occurring small-molecule phytochemical best known for its role in cancer chemoprevention research. It belongs to the isothiocyanate class of organosulfur compounds and has the chemical formula C₉H₉NS.
Source: Derived from glucosinolates in cruciferous vegetables
PEITC in plants exists mainly as the glucosinolate precursor (gluconasturtiin). Upon tissue disruption (chewing, chopping), myrosinase converts gluconasturtiin → PEITC.

-PEITC bioavailability from fresh, chopped microgreens is high
-Co-consumption with other isothiocyanates is additive/synergistic
-Peak plasma levels: ~1–3 hours post-consumption
-Half-life: ~4–6 hours
-Generally well tolerated up to 40 mg/day (mild GI irritation at higher dose)

PEITC is best characterized for its dual role in xenobiotic metabolism:
Inhibition of Phase I enzymes
-Suppresses cytochrome P450 enzymes (e.g., CYP1A1, CYP2E1)
-Reduces activation of pro-carcinogens

-Selectively depletes GSH in cancer cells
-Directly increases ROS beyond buffering capacity

Key pathways in cancer cells
-GSH depletion
-Mitochondrial ROS amplification
-ASK1/JNK apoptosis

Chemo relevance
-Frequently chemo-sensitizing
-Opposite of NAC/GSH

Induction of Phase II enzymes
-Activates NRF2–KEAP1 signaling
-Increases expression of detoxification and antioxidant enzymes such as:
 -Glutathione S-transferases (GSTs)
 -NAD(P)H quinone oxidoreductase 1 (NQO1)
 -Heme oxygenase-1 (HMOX1)

In preclinical systems, PEITC has been shown to:
-Deplete intracellular glutathione (GSH), increasing oxidative stress in cancer cells
-Induce mitochondrial dysfunction and apoptosis
-Inhibit histone deacetylases (HDACs) (context-dependent)
-Suppress pro-survival signaling pathways (e.g., STAT3, NF-κB)
-Target cancer stem–like cells in some models

Dietary origins

PEITC present in vegetables such as:
-Watercress (the richest source)
-Broccoli
-Cabbage
-Brussels sprouts
-Radish

Bioavailability depends on:
-Food preparation
-Gut microbiota (myrosinase activity if plant enzyme is inactive)

watercress microgreens generally have higher PEITC (and/or its precursor gluconasturtiin) per gram than mature watercress.
-The enrichment is most pronounced per unit fresh weight in the 7–14 day window.
-Absolute values vary substantially with cultivar, light intensity, sulfur/nitrogen nutrition, and post-harvest handling.
| Growth stage    |      Age | PEITC potential (mg / 100 g FW) |         Relative |
| --------------- | -------: | ------------------------------: | ---------------: |
| **Microgreens** |   7–10 d |                     **3.0–6.0** | **~2–4×** mature |
| **Microgreens** |  11–14 d |                     **2.5–5.0** |            ~2–3× |
| Baby leaf       |  21–28 d |                         1.5–3.0 |            ~1–2× |
| Mature leaf     | 35–45+ d |                         0.8–1.5 |         baseline |

Dry weight basis
| Growth stage          | PEITC potential (mg / g DW) |
| --------------------- | --------------------------: |
| Microgreens (7–10 d)  |                 **1.8–3.5** |
| Microgreens (11–14 d) |                     1.5–3.0 |
| Mature leaf           |                     0.6–1.2 |

Expect 2–5× variability depending on:
-Light spectrum (blue light ↑ glucosinolates)
-Sulfur availability

Practical optimization tips
Lighting
-12–16 h/day
-150–300 µmol/m²/s PAR (typical shop LEDs at 20–30 cm distance)
Soil
-Peat or peat-blend preferred
-Avoid over-watering (dilutes concentration)
Nutrition (optional but effective)
-One light watering with ¼-strength sulfate-containing fertilizer around day 4–5 can increase PEITC ~15–30%
Harvest & use
-Cut, rest 5–10 minutes, then consume (allows myrosinase to fully convert gluconasturtiin → PEITC)

Dose: (100 g fresh microgreens ≈ 2–4 mg bioavailable PEITC)
-ie below doses are not really acheivable from fresh microgreens
Minimum biologically active dose (humans): ~10–15 mg PEITC/day
Common efficacy range used in human trials: 20–40 mg/day
Upper short-term doses studied (generally tolerated): 60 mg/day
Diet-achievable with watercress microgreens: Yes, at realistic portions
These doses are chemopreventive / pathway-modulating, not cytotoxic chemotherapy.
| PEITC dose (mg/day) | Dominant biological effects                     |
| ------------------: | ----------------------------------------------- |
|         **5–10 mg** | Phase II enzymes, mild NRF2                     |
|        **10–20 mg** | HDAC inhibition, ROS signaling                  |
|        **20–40 mg** | Apoptosis, cell-cycle arrest, anti-inflammatory |
|        **40–60 mg** | Strong redox stress in cancer cells             |
|              >60 mg | Limited data; GI irritation risk                |

Rank	Pathway / Target Axis	Direction	Primary Effect	Notes / Cancer Relevance	Ref
1	GSH / thiol buffering (PEITC–GSH conjugation → GSH depletion)	↓ GSH	Upstream redox collapse	PEITC drives a GSH-iron-ROS axis; GSH depletion is upstream of multiple death programs	(ref)
2	ROS accumulation	↑ ROS	Oxidative stress trigger	PEITC increases intracellular ROS, which then drives mitochondrial disruption and apoptosis	(ref)
3	Ferroptosis (lipid peroxidation; anti-ferroptotic machinery overwhelmed)	↑ ferroptosis	Iron-dependent oxidative death	Direct evidence that PEITC induces ferroptosis (alongside other death programs) via GSH-iron-ROS mechanisms	(ref)
4	Mitochondrial integrity (ΔΨm; cytochrome-c release)	↓ ΔΨm / ↑ cytochrome-c release	Mitochondrial dysfunction	PEITC promotes ROS, decreases ΔΨm, increases cytochrome-c release in cancer cells	(ref)
5	Intrinsic apoptosis (caspase-9 → caspase-3)	↑ caspase activation / ↑ apoptosis	Execution-phase cell death	PEITC activates caspase-9 and caspase-3 and induces apoptosis downstream of mitochondrial dysfunction	(ref)
6	Akt → JNK → Mcl-1 axis	↓ Akt / ↑ JNK / ↓ Mcl-1	Pro-survival signaling collapse	Leukemia study: PEITC-initiated death is linked to Akt inactivation → JNK activation → Mcl-1 downregulation	(ref)
7	NF-κB signaling	↓ NF-κB transcriptional activity / ↓ p65 nuclear translocation	Reduced pro-survival / inflammatory transcription	PEITC inhibits NF-κB activity and NF-κB–regulated genes (e.g., cyclin D1, VEGF, Bcl-xL) in prostate cancer cells	(ref)
8	JAK–STAT3 signaling	↓ STAT3 activation	Reduced survival / growth signaling	PEITC inhibits IL-6–driven JAK–STAT3 activation in prostate cancer cells (STAT3 signaling direction shown)	(ref)
9	Cell-cycle regulation	↑ G2/M arrest	Proliferation blockade	PEITC inhibits proliferation and induces G2/M cell-cycle arrest in prostate cancer cells	(ref)
10	Autophagy program	↑ autophagy	Stress response (can interact with death)	PEITC induces autophagy along with ferroptosis and apoptosis in osteosarcoma cells	(ref)
11	Migration / invasion (MMPs, FAK, RhoA)	↓ migration & invasion / ↓ MMPs	Anti-metastatic phenotype	PEITC suppresses migration/invasion and downregulates MMP-2/-7/-9 and motility regulators (FAK, RhoA)	(ref)
12	In vivo anti-tumor effect	↓ tumor burden / ↑ survival (model-dependent)	Demonstrated efficacy in animal model	Leukemia study reports PEITC anti-leukemic activity including mechanistic signaling changes and in vivo efficacy evidence	(ref)

lipid-P, lipid peroxidation: Click to Expand ⟱

Source:

Type:

Lipid peroxidation is a chain reaction process in which free radicals (often reactive oxygen species, or ROS) attack lipids containing carbon-carbon double bonds, especially polyunsaturated fatty acids. This attack results in the formation of lipid radicals, peroxides, and subsequent breakdown products.
Lipid peroxidation can cause damage to cell membranes, leading to increased permeability and disruption of cellular functions. This damage can initiate a cascade of events that may contribute to carcinogenesis.
The byproducts of lipid peroxidation, such as malondialdehyde (MDA) and 4-hydroxynonenal (4-HNE), can form adducts with DNA, leading to mutations. These mutations can disrupt normal cellular processes and contribute to the development of cancer.
Lipid peroxidation damages cell membranes, disrupts cellular functions, and can trigger inflammatory responses. It is a marker of oxidative stress and is implicated in many chronic diseases.

Negative Prognostic Indicator: In many cancers, high levels of lipid phosphates, particularly S1P, are associated with poor prognosis, indicating a more aggressive tumor phenotype and potential resistance to therapy.
Mixed Evidence: The prognostic significance of lipid phosphates can vary by cancer type, with some studies showing that their expression may not always correlate with adverse outcomes.

Scientific Papers found: Click to Expand⟱

5016-

PEITC,

Phenethyl Isothiocyanate (PEITC) interaction with Keap1 activates the Nrf2 pathway and inhibits lipid accumulation in adipocytes

in-vitro,

Nor,

*NRF2↑, *Diff↓, *Weight↓, *lipid-P↓,

Showing Research Papers: 1 to 1 of 1

* indicates research on normal cells as opposed to diseased cells
Total Research Paper Matches: 1

Pathway results for Effect on Cancer / Diseased Cells:

Total Targets: 0

Pathway results for Effect on Normal Cells:

Redox & Oxidative Stress ⓘ

lipid-P↓, 1, NRF2↑, 1,

Proliferation, Differentiation & Cell State ⓘ

Diff↓, 1,

Functional Outcomes ⓘ

Weight↓, 1,
Total Targets: 4

Scientific Paper Hit Count for: lipid-P, lipid peroxidation

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