γ-linolenic acid (Borage Oil) / PCNA Cancer Research Results

GLA, γ-linolenic acid (Borage Oil): Click to Expand ⟱
Features:

γ-Linolenic acid (GLA) — an omega-6 polyunsaturated fatty acid (18:3 n-6) found in high concentration in borage oil, evening primrose oil, and blackcurrant seed oil. Metabolized to dihomo-γ-linolenic acid (DGLA) → precursor of anti-inflammatory eicosanoids (e.g., PGE1).

Primary mechanisms (conceptual rank):
1) Membrane lipid remodeling → altered eicosanoid balance (↑ PGE1; DGLA-derived metabolites)
2) Modulation of inflammatory signaling (↓ NF-κB tone; context-dependent)
3) Lipid peroxidation susceptibility (PUFA-driven ROS shifts)
4) Potential anti-proliferative effects (high concentration only; tumor models)
5) Metabolic signaling interaction (PPAR activation context-dependent)

Bioavailability / PK relevance: Orally absorbed and incorporated into membrane phospholipids; rapidly elongated to DGLA. Plasma levels achievable with supplementation; cellular effects reflect incorporation over days–weeks (remodeling).

In-vitro vs oral exposure: Direct tumor cytotoxicity generally observed at supra-physiologic concentrations; physiologic doses mainly alter lipid signaling rather than induce apoptosis.

Clinical evidence status: Used for inflammatory conditions (e.g., dermatitis, RA); oncology data limited and inconsistent; no cancer approval.

GLA (abundant in borage oil) has shown anti-proliferative and pro-apoptotic effects on multiple cancer cell lines and in animal models (mechanisms include ER stress, mitochondrial dysfunction, altered eicosanoid signaling).
-Borage plants can contain unsaturated PAs(Pyrrolizidine alkaloids) which are hepatotoxic and genotoxic/carcinogenic. Many authorities advise only using borage oil products certified PA-free, and caution against long-term or high-dose use.
-γ-gamma linolenic acid (GLA, 18:3n-6) are polyunsaturated fatty acids (PUFA) that improve the human health

γ-Linolenic Acid (Borage Oil) — Cancer vs Normal Cell Pathway Map

Rank Pathway / Axis Cancer Cells Normal Cells TSF Primary Effect Notes / Interpretation
1 Membrane lipid remodeling (DGLA incorporation) ↑ substrate (context-dependent) ↑ membrane incorporation G Phospholipid composition shift Changes membrane fluidity and eicosanoid substrate pool; time-dependent remodeling.
2 Eicosanoid balance (PGE1 vs AA-derived eicosanoids) ↔ / ↓ pro-inflammatory tone ↓ inflammation G Anti-inflammatory modulation DGLA-derived PGE1 often anti-inflammatory; may counterbalance arachidonic acid metabolites.
3 ROS / Lipid peroxidation ↑ (PUFA-dependent; dose-dependent) ↔ / ↑ (high dose) P/R Lipid oxidative susceptibility Highly unsaturated structure increases peroxidation potential; may sensitize tumors to oxidative stress.
4 NF-κB ↓ (context-dependent) ↓ R/G Reduced inflammatory transcription Often secondary to altered eicosanoid signaling.
5 PPAR (α/γ) ↑ (model-dependent) ↑ R/G Lipid metabolic regulation GLA and derivatives may activate PPAR pathways influencing lipid and glucose metabolism.
6 Apoptosis ↑ (high concentration only) ↔ R/G Mitochondrial apoptosis (experimental) Reported in certain tumor lines at supra-physiologic levels.
7 Ferroptosis ↑ (theoretical; PUFA-linked) ↔ R/G Lipid peroxidation vulnerability PUFA enrichment can enhance ferroptotic susceptibility depending on antioxidant context.
8 HIF-1α ↔ (limited evidence) ↔ G Not primary axis No consistent direct modulation reported.
9 NRF2 ↔ / ↑ (adaptive; context-dependent) ↔ R/G Redox-response adjustment May activate antioxidant response secondary to lipid peroxidation stress.
10 Ca²⁺ signaling ↔ (membrane-dependent) ↔ P/R Membrane microdomain modulation Changes in lipid composition can subtly influence ion channel behavior.
11 Clinical Translation Constraint ↓ (constraint) ↓ (constraint) — Context-dependent effects Physiologic doses primarily anti-inflammatory; anti-cancer cytotoxicity not clinically established.

TSF legend:
P: 0–30 min (lipid oxidation events)
R: 30 min–3 hr (acute signaling shifts)
G: >3 hr (membrane remodeling and phenotype changes)
PCNA, Proliferating Cell Nuclear Antigen: Click to Expand ⟱
Source:
Type:
Proliferating Cell Nuclear Antigen (PCNA) is a protein that plays a crucial role in DNA replication and repair. It acts as a processivity factor for DNA polymerase, helping to increase the efficiency of DNA synthesis. PCNA is also involved in various cellular processes, including cell cycle regulation, DNA damage response, and chromatin remodeling.
PCNA is often overexpressed in many types of tumors. This overexpression is associated with increased cell proliferation, which is a hallmark of cancer. The elevated levels of PCNA can serve as a biomarker for tumor growth and progression.
PCNA is called the “ringmaster of the genome” : it regulates the cell cycle and participates in DNA synthesis. PCNA is widely used as a cell proliferation marker in both healthy and malignant tissues.
Scientific Papers found: Click to Expand⟱
4505- GLA,    Gamma linolenic acid suppresses hypoxia-induced proliferation and invasion of non-small cell lung cancer cells by inhibition of HIF1α
- in-vitro, NSCLC, Calu-1
TumCP↓, PCNA↓, Ki-67↓, MCM2↓, Bcl-2↓, BAX↑, cl‑Casp3↑, TumCMig↓, TumCI↓, Hif1a↓, VEGF↓,

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:


Cell Death ⓘ

BAX↑, 1,   Bcl-2↓, 1,   cl‑Casp3↑, 1,  

DNA Damage & Repair ⓘ

PCNA↓, 1,  

Proliferation, Differentiation & Cell State ⓘ

MCM2↓, 1,  

Migration ⓘ

Ki-67↓, 1,   TumCI↓, 1,   TumCMig↓, 1,   TumCP↓, 1,  

Angiogenesis & Vasculature ⓘ

Hif1a↓, 1,   VEGF↓, 1,  

Clinical Biomarkers ⓘ

Ki-67↓, 1,  
Total Targets: 12

Pathway results for Effect on Normal Cells:


Total Targets: 0

Scientific Paper Hit Count for: PCNA, Proliferating Cell Nuclear Antigen
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#:374  Target#:489  State#:%  Dir#:1
  wNotes=0  sortOrder:rid,rpid

 

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