Piperine / CTLA-4 Cancer Research Results

PI, Piperine: Click to Expand ⟱

Features:

Compound of black pepper that boosts bioavailability of curcumin

piperine’s bioenhancing function, often more important than piperine’s direct anticancer activity

Mechanisms of bioenhancement
| Mechanism                     | Effect                             |
| ----------------------------- | ---------------------------------- |
| **↓ CYP3A4, CYP2C9**          | Slows metabolic clearance          |
| **↓ UGT (glucuronidation)**   | Increases parent compound exposure |
| **↓ P-glycoprotein (ABCB1)**  | Improves intracellular retention   |
| **↑ Intestinal permeability** | Better oral absorption             |

-Curcumin: ↑ bioavailability ~20–30×
-Resveratrol, EGCG, quercetin: ↑ exposure 2–10×

Primary pathways: NF-κB, STAT3, PI3K/Akt/mTOR, apoptosis, EMT
Direct anticancer potency: modest
Bioenhancing value: central and often dominant

Rank	Pathway / Target Axis	Direction	Primary Effect	Notes / Cancer Relevance	Ref
1	Wnt / β-catenin signaling	↓ Wnt/β-catenin (↓ β-catenin nuclear program)	Growth & stemness suppression	Piperine suppresses canonical Wnt signaling and shows anti-cancer effects in colorectal cancer cells	(ref)
2	PI3K → AKT survival signaling	↓ PI3K/AKT signaling	Reduced survival / increased apoptosis	Gastric cancer study concludes piperine inhibits proliferation and induces apoptosis through inhibition of PI3K/Akt signaling	(ref)
3	AKT → mTOR axis	↓ Akt/mTOR	Anti-growth + anti-migration	Piperine downregulates Akt/mTOR signaling with associated inhibition of migration and MMP-9 expression	(ref)
4	NF-κB transcriptional program	↓ NF-κB activation	Reduced inflammatory / pro-survival gene expression	Piperine is reported as a potent inhibitor of NF-κB and related transcription factor activity in melanoma cells	(ref)
5	STAT3 → Snail EMT axis	↓ STAT3 / ↓ Snail → ↓ EMT	Anti-migration / anti-invasion	Piperine inhibits colorectal cancer migration/invasion through a STAT3/Snail-mediated EMT mechanism	(ref)
6	Multidrug resistance transporter ABCB1 (P-gp)	↓ P-gp-mediated efflux (chemosensitization)	Improved chemo response (MDR reversal)	Demonstrates piperine has chemosensitizing activity in P-gp–mediated MDR models (piperine characterized as P-gp substrate/modulator)	(ref)
7	ROS / oxidative stress	↑ ROS	Upstream stress trigger	Piperine induces oxidative stress in cancer cells (ROS increase shown) and links it to growth inhibition/apoptosis	(ref)
8	Intrinsic apoptosis (caspase activation)	↑ apoptosis	Programmed cell death	HeLa study: piperine induces apoptosis in a dose-dependent manner with apoptosis markers reported	(ref)
9	Autophagy-dependent cell death (ROS–Akt/mTOR coupling)	↑ autophagy-dependent death (with ↓ Akt/mTOR)	Stress-lethal program	Colon cancer study: piperine induces autophagy-dependent cell death by increasing ROS and inhibiting Akt/mTOR signaling	(ref)
10	Cell-cycle progression	↑ cell-cycle arrest (context-dependent)	Proliferation blockade	Rectal cancer cell study: piperine impairs cell-cycle progression and produces cytostatic/cytotoxic effects	(ref)
11	Migration / invasion (MMP-9 axis)	↓ migration / ↓ MMP-9	Anti-metastatic phenotype	Piperine suppresses migration with MMP-9 downregulation and Akt/mTOR inhibition	(ref)
12	In vivo chemosensitization (doxorubicin)	↑ doxorubicin sensitivity	Enhanced therapeutic efficacy	Study evaluates piperine as an adjuvant to enhance doxorubicin sensitivity in triple-negative breast cancer models	(ref)

CTLA-4, Cytotoxic T-Lymphocyte Antigen‑4: Click to Expand ⟱

Source:

Type:

CTLA-4 is a key immune checkpoint molecule that plays an important role in downregulating immune responses and maintaining self-tolerance. Its modulation has critical implications in cancer immunotherapy.
CTLA-4 is primarily expressed on activated T cells (and constitutively on regulatory T cells), where it functions as a negative regulator of T-cell immune responses.
CTLA-4 has been one of the first immune checkpoint molecules targeted in cancer therapy.
– Blockade of CTLA-4 (e.g., with ipilimumab) can enhance T-cell activation and restore antitumor immunity, leading to durable responses in certain cancer types such as melanoma.

Cancers such as melanoma, NSCLC, RCC, colorectal cancer, HNSCC, and certain hematologic malignancies, elevated CTLA-4 expression—especially on tumor-infiltrating lymphocytes—often correlates with an immunosuppressive, exhausted T-cell phenotype and poorer prognosis. However, this same expression also marks tumors that may respond to CTLA-4 blockade therapies, highlighting its dual role as a prognostic biomarker and a therapeutic target in the rapidly evolving field of cancer immunotherapy.

Scientific Papers found: Click to Expand⟱

1164-

PI,

Inhibition of T cell activation by the phytochemical piperine

in-vitro,

Nor,

*other↓, *CD25+↓, *IFN-γ↓, *IL2↓, *IL4↓, *IL17↓, *CD69↓, *CTLA-4↓, *p‑ERK↓, *IKKα↓,

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:

Transcription & Epigenetics ⓘ

other↓, 1,

Proliferation, Differentiation & Cell State ⓘ

p‑ERK↓, 1,

Immune & Inflammatory Signaling ⓘ

CD25+↓, 1, CD69↓, 1, CTLA-4↓, 1, IFN-γ↓, 1, IKKα↓, 1, IL17↓, 1, IL2↓, 1, IL4↓, 1,
Total Targets: 10

Scientific Paper Hit Count for: CTLA-4, Cytotoxic T-Lymphocyte Antigen‑4

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