Columbamine-Mediated PTEN/AKT Signal Pathway Regulates the Progression of Glioma

Hai-Tao Niu1, Yang Liu1, Yan-Zhou Wang1

  • 1Department of Neurosurgery, Cangzhou Central Hospital, Cangzhou, Hebei 061000, People's Republic of China.

Abstract

Insights

Columbamine, a natural compound, inhibits glioma cell growth, migration, and invasion while promoting apoptosis. It functions by regulating the PTEN/AKT pathway, offering potential for new anti-glioma drug development.

Area of Science:

  • Oncology
  • Pharmacology
  • Molecular Biology

Background:

  • Glioma treatment remains challenging with low survival rates.
  • Understanding glioma progression mechanisms is crucial for identifying therapeutic targets.
  • Columbamine, derived from Rhizoma Coptidis, is investigated for its anti-glioma potential.

Purpose of the Study:

  • To investigate the effect of columbamine on glioma progression.
  • To elucidate the mechanism of columbamine action in glioma cells.
  • To explore columbamine as a potential therapeutic agent for glioma.

Main Methods:

  • Cell viability, proliferation, migration, and invasion assays (MTT, clone formation, wound healing, Transwell).
  • Apoptosis assessment via flow cytometry and TUNEL assays.
  • Western blot analysis to evaluate PTEN and AKT pathway modulation, using PTEN inhibitor (SF1670) and AKT activator (SC79).

Main Results:

  • Columbamine significantly inhibited proliferation, migration, and invasion in glioma cell lines (SHG44, U251).
  • Columbamine induced apoptosis in glioma cells.
  • Columbamine treatment prevented AKT phosphorylation and increased PTEN expression, suggesting PTEN/AKT pathway regulation.

Conclusions:

  • Columbamine demonstrates potent anti-glioma effects by inhibiting proliferation and metastasis while inducing apoptosis.
  • The mechanism involves the regulation of the PTEN/AKT signaling pathway.
  • Columbamine presents a promising new therapeutic strategy for glioma treatment.

Related Concept Videos

PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
4.7K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
4.1K
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.9K
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.9K
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
6.9K
Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which...
9.7K