Recent advances in PI3K/PKB/mTOR inhibitors as new anticancer agents

Maria Antonietta Occhiuzzi1, Gernando Lico1, Giuseppina Ioele1

  • 1Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy.

Insights

The PI3K/PKB/mTOR pathway drives cancer by promoting cell proliferation. Inhibitors targeting this pathway, especially multi-target drugs, show promise for effective cancer treatment with limited resistance.

Area of Science:

  • Biochemistry
  • Oncology
  • Pharmacology

Background:

  • The PI3K/PKB/mTOR signaling pathway is crucial for cell-cycle regulation.
  • Overactivation of this pathway contributes to cancer development by inhibiting apoptosis and promoting cell proliferation.
  • This pathway is a key therapeutic target for various cancers, including breast cancer and follicular lymphoma.

Purpose of the Study:

  • To review small molecule drugs targeting the PI3K/PKB/mTOR signaling pathway.
  • To highlight the potential of these drugs as anticancer agents.

Main Methods:

  • Literature review of small molecule inhibitors targeting the PI3K/PKB/mTOR pathway.
  • Analysis of drug efficacy and resistance profiles.

Main Results:

  • Several selective and non-selective inhibitors targeting the PI3K/PKB/mTOR pathway have been identified.
  • Multi-target inhibitors demonstrate greater efficiency, potency, and reduced drug resistance compared to single-target inhibitors.
  • These inhibitors represent promising drug candidates for cancer treatment.

Conclusions:

  • Small molecule drugs modulating the PI3K/PKB/mTOR pathway are valuable in cancer therapy.
  • Targeting this pathway offers a promising strategy for developing novel anticancer agents.

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...
3.8K
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...
3.9K
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
7.8K
Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.9K
Drugs that Stabilize Microtubules01:15

Drugs that Stabilize Microtubules

Microtubules are dynamic structures that undergo cycles of catastrophe and rescue. The microtubules play a central role in cell division by forming the spindle apparatus for segregating the chromosomes. This makes them ideal targets for regulating dividing cells in tumors and malignant cancer cells. Microtubule stabilizing drugs help stabilize the microtubule formation and promote its polymerization. Paclitaxel was the first microtubule stabilizing agent used as anticancer drug in chemotherapy...
2.1K
Drugs that Destabilize Microtubules01:10

Drugs that Destabilize Microtubules

Microtubules are dynamic structures and can be regulated by microtubule targeting agents (MTAs). Microtubule destabilizing drugs are a class of MTAs that destabilize and prevent microtubules' polymerization. Both natural and synthetic chemicals can be found under this class of drugs. Vincristine and vinblastine, two vinca alkaloids, and colchicine were among the first to be discovered. These drugs can affect cells in various ways, either by inducing a change in cell morphology, preventing...
2.0K