Salvia miltiorrhiza / NRF2 Cancer Research Results

SM, Salvia miltiorrhiza: Click to Expand ⟱
Features:

Salvia miltiorrhiza (Danshen; SM) — a traditional Chinese medicinal root containing two major bioactive classes: lipophilic tanshinones (e.g., tanshinone IIA, cryptotanshinone) and hydrophilic phenolic acids (e.g., salvianolic acid A/B). Studied in oncology, cardiovascular, and neurovascular contexts.

Primary mechanisms (conceptual rank):
1) STAT3 / PI3K-AKT-mTOR suppression (anti-survival signaling; mainly tanshinones)
2) ROS modulation (often ↑ in cancer → apoptosis; ↓ oxidative injury in normal tissue)
3) NF-κB inhibition (anti-inflammatory, anti-proliferative)
4) Cell-cycle arrest (G0/G1 or G2/M; cyclin/CDK modulation)
5) Anti-angiogenic signaling (↓ VEGF / HIF-1α coupling)

Bioavailability / PK relevance: Tanshinones are lipophilic with poor oral bioavailability; phenolic acids more water-soluble but rapidly metabolized. Many in-vitro cancer effects occur at concentrations higher than typical plasma levels from oral preparations unless specialized formulations are used.

In-vitro vs oral exposure: Anti-cancer cytotoxicity frequently at micromolar range (qualifier: high concentration only for direct tumor apoptosis).

Clinical evidence status: Widely used in cardiovascular medicine (Asia); oncology evidence largely preclinical or adjunct-hypothesis; no major oncology RCT approval.

Red sage, redroot sage, Chinese sage or danshen.
Salvianolic Acid A (SAA) is predominantly isolated from Salvia miltiorrhiza, commonly known as Danshen.
Tanshinone IIA is the main effective component of Salvia miltiorrhiza known as 'Danshen'

Salvianolic Acid A, primarily derived from Salvia miltiorrhiza (Danshen), shows promise in cancer research due to its ability to inhibit cell proliferation, induce apoptosis, reduce angiogenesis, and impact multiple signaling pathways involved in tumor progression.

Salvianolic Acid A may impact several intracellular signaling pathways involved in cancer progression:
NF-κB Pathway: SAA might inhibit the NF-κB pathway, reducing inflammation and cell proliferation signals.
MAPK Pathways (ERK, JNK, p38): By modulating these pathways, SAA can influence cell survival, differentiation, and apoptosis.
PI3K/Akt Pathway: Inhibition of this pathway is another mechanism through which SAA can reduce cancer cell survival and proliferation.
Oxidative Stress Reduction: SAA’s antioxidant properties may help in reducing oxidative stress, which is implicated in cancer progression and chemoresistance.
Synergistic Effects with Conventional Therapies:
Preliminary studies suggest that Salvianolic Acid A might enhance the effectiveness of various chemotherapeutic agents.

Some studies have observed anti-proliferative effects at concentrations around 10–50 µM. rodent models have been reported in the range of 10–100 mg/kg

Salvia miltiorrhiza (Danshen) — Cancer vs Normal Cell Pathway Map

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 STAT3 signaling ↓ (primary; tanshinone-driven) ↔ R/G Reduced survival transcription Cryptotanshinone widely reported STAT3 inhibitor; central anti-proliferative axis.
2 PI3K/AKT/mTOR ↓ ↔ / ↑ metabolic protection R/G Suppressed anabolic signaling Often linked to reduced proliferation and enhanced apoptosis.
3 ROS ↑ (dose-dependent; apoptosis) ↓ (phenolic antioxidant) P/R Redox divergence Biphasic: pro-oxidant in tumors (tanshinones); antioxidant in normal tissues (salvianolic acids).
4 Intrinsic apoptosis (Bax↑, Bcl-2↓, caspases) ↑ ↔ R/G Mitochondrial apoptosis Common downstream outcome of STAT3/AKT suppression and ROS elevation.
5 NF-κB ↓ ↓ R/G Anti-inflammatory / anti-survival Contributes to both anti-cancer and cardiovascular protective roles.
6 Cell Cycle (Cyclin D1/CDK4, p21) ↓ proliferation ↔ G G0/G1 or G2/M arrest Model-dependent checkpoint enforcement.
7 HIF-1α / VEGF ↓ ↔ G Reduced angiogenesis Reported anti-angiogenic effect; linked to tumor growth inhibition in vivo models.
8 NRF2 ↔ / ↑ (context-dependent) ↑ R/G Stress-response activation Phenolic components may activate antioxidant pathways in normal tissues; cancer context variable.
9 Ca²⁺ / ER stress ↑ (stress-induced; model-dependent) ↔ P/R ER-mitochondrial coupling Observed in apoptosis models; not always primary mechanism.
10 Ferroptosis ↑ (investigational; ROS-linked) ↔ R/G Lipid peroxidation stress Possible secondary overlap via redox modulation; not universally established.
11 Clinical Translation Constraint ↓ (constraint) ↓ (constraint) — Bioavailability + heterogeneity Variable extract composition (tanshinone vs phenolic content); limited oncology clinical trials.

TSF legend:
P: 0–30 min (direct redox or signaling interactions)
R: 30 min–3 hr (acute stress and transcriptional modulation)
G: >3 hr (gene regulation and phenotype outcomes)
NRF2, nuclear factor erythroid 2-related factor 2: Click to Expand ⟱
Source: TCGA
Type: Antiapoptotic
Nrf2 is responsible for regulating an extensive panel of antioxidant enzymes involved in the detoxification and elimination of oxidative stress. Thought of as "Master Regulator" of antioxidant response.
-One way to estimate Nrf2 induction is through the expression of NQO1.
NQO1, the most potent inducer:
SFN 0.2 μM,
quercetin (2.5 μM),
curcumin (2.7 μM),
Silymarin (3.6 μM),
tamoxifen (5.9 μM),
genistein (6.2 μM ),
beta-carotene (7.2μM),
lutein (17 μM),
resveratrol (21 μM),
indol-3-carbinol (50 μM),
chlorophyll (250 μM),
alpha-cryptoxanthin (1.8 mM),
and zeaxanthin (2.2 mM)

1. Raising Nrf2 enhances the cell's antioxidant defenses and ↓ROS. This strategy is used to decrease chemo-radio side effects.
2. Downregulating Nrf2 lowers antioxidant defenses and ↑ROS. In cancer cells this leads to DNA damage, and cell death.
3. However there are some cases where increasing Nrf2 paradoxically causes an increase in ROS (cancer cells). Such as cases of Mitochondial overload, signal crosstalk, reductive stress

-In some cases, Nrf2 is overexpressed in cancer cells, which can lead to the activation of genes involved in cell proliferation, angiogenesis, and metastasis. This can contribute to the development of resistance to chemotherapy and targeted therapies.
-Increased Nrf2 expression: Lung, Breast, Colorectal, Prostrate.
Decreased Nrf2 expression: Skine, Liver, Pancreatic.
-Nrf2 is a cytoprotective transcription factor which demonstrated both a negative effect as well as a positive effect on cancer
- "promotes Nrf2 translocation from the cytoplasm to the nucleus," means facilitates the movement of Nrf2 into the nucleus, thereby enhancing the cell's antioxidant and cytoprotective responses. -Major regulator of Nrf2 activity in cells is the cytosolic inhibitor Keap1.

Nrf2 Inhibitors and Activators
Nrf2 Inhibitors: Brusatol, Luteolin, Trigonelline, VitC, Retinoic acid, Chrysin
Nrf2 Activators: SFN, OPZ EGCG, Resveratrol, DATS, CUR, CDDO, Api
- potent Nrf2 inducers from plants include sulforaphane, curcumin, EGCG, resveratrol, caffeic acid phenethyl ester, wasabi, cafestol and kahweol (coffee), cinnamon, ginger, garlic, lycopene, rosemany

Nrf2 plays dual roles in that it can protect normal tissues against oxidative damage and can act as an oncogenic protein in tumor tissue.
– In healthy tissues, NRF2 activation helps protect cells from oxidative damage and maintains cellular homeostasis.
– In many cancers, constitutive activation of NRF2 (often through mutations in NRF2 itself or loss-of-function mutations in KEAP1) leads to an enhanced antioxidant capacity.
– This upregulation can promote tumor cell survival by enabling cancer cells to thrive under oxidative stress, resist chemotherapeutic agents, and sustain metabolic reprogramming.
– Elevated NRF2 levels have been implicated in promoting tumor growth, metastasis, and resistance to therapy in various malignancies.
– High or sustained NRF2 activity is frequently associated with aggressive tumor phenotypes, poorer prognosis, and decreased overall survival in several cancer types.
– While its activation is essential for protecting normal cells from oxidative stress, aberrant or sustained NRF2 activation in tumor cells can lead to enhanced survival, therapeutic resistance, and tumor progression.

NRF2 inhibitors: (to decrease antioxidant defenses and increase cell death from ROS).
-Brusatol: most cited natural inhibitors of Nrf2.
-Luteolin: luteolin can reduce Nrf2 activity in specific cancer models and may enhance cell sensitivity to chemotherapy. However, luteolin is also known as an antioxidant, and its influence on Nrf2 can sometimes be context dependent.
-Apigenin: certain studies to down‑regulate Nrf2 in cancer cells: Dose and context dependent .
-Oridonin:
-Wogonin: although its effects might be cell‑ and dose‑specific.
- Withaferin A

Scientific Papers found: Click to Expand⟱
1193- SM,    Cryptotanshinone from the Salvia miltiorrhiza Bunge Attenuates Ethanol-Induced Liver Injury by Activation of AMPK/SIRT1 and Nrf2 Signaling Pathways
- in-vivo, Alcohol, NA - in-vitro, Liver, HepG2
*p‑AMPK↑, *SIRT1↑, *NRF2↑, *CYP2E1↓, *lipoGen↓, *ROS↓, *Inflam↓,

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 ⓘ

CYP2E1↓, 1,   NRF2↑, 1,   ROS↓, 1,  

Core Metabolism/Glycolysis ⓘ

p‑AMPK↑, 1,   lipoGen↓, 1,   SIRT1↑, 1,  

Immune & Inflammatory Signaling ⓘ

Inflam↓, 1,  
Total Targets: 7

Scientific Paper Hit Count for: NRF2, nuclear factor erythroid 2-related factor 2
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#:146  Target#:226  State#:%  Dir#:2
  wNotes=0  sortOrder:rid,rpid

 

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