Tyrosine Kinase Receptors in Oncology

Jorge Esteban-Villarrubia1, Juan José Soto-Castillo1, Javier Pozas1

  • 1Medical Oncology Department, University Hospital Ramon y Cajal, 28034 Madrid, Spain.

Insights

Tyrosine kinase inhibitors (TKIs) offer targeted cancer treatment by blocking tyrosine kinase receptors (TKRs) involved in tumor growth. This review explores TKR families, their role in cancer, and TKI therapies for precision oncology.

Area of Science:

  • Molecular Biology
  • Oncology
  • Pharmacology

Background:

  • Tyrosine kinase receptors (TKRs) are crucial cell signaling molecules.
  • Genetic alterations in TKRs are implicated in cancer development and tumorigenesis.
  • Tyrosine kinase inhibitors (TKIs) represent a significant advancement in molecularly targeted cancer therapy.

Purpose of the Study:

  • To comprehensively review TKR families and their function in tumor cell expansion.
  • To elucidate the mechanisms by which TKIs inhibit TKR-driven tumorigenesis.
  • To discuss the role of TKIs in combination therapies and the future of precision oncology.

Main Methods:

  • Literature review of scientific publications on TKRs and TKIs.
  • Analysis of TKR signaling pathways in various cancer types.
  • Evaluation of clinical trial data for TKI efficacy and combination strategies.

Main Results:

  • TKRs regulate essential pathways for cell survival and differentiation, with alterations driving cancer.
  • TKIs effectively target specific TKRs, interrupting oncogenic signaling cascades.
  • TKIs show promise in monotherapy and combination treatments, advancing precision oncology.

Conclusions:

  • Understanding TKR families and their inhibitors is vital for cancer treatment.
  • TKIs are a cornerstone of molecularly targeted cancer therapy.
  • The shift towards molecular-based therapy in clinical trials signifies a move towards more effective precision oncology.

Related Concept Videos

Receptor Tyrosine Kinases01:26

Receptor Tyrosine Kinases

Receptor tyrosine kinases or RTKs are membrane-bound receptors that phosphorylate specific tyrosine on protein substrates. RTKs regulate cellular growth, differentiation, survival, and migration. They contain an extracellular ligand binding domain, a transmembrane domain, and a cytosolic tail with intrinsic kinase activity. Several extracellular signaling molecules activate RTKs in one or more ways and relay the signal downstream. Ligands such as platelet-derived growth factor (PDGF) or...
16.7K
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
3.6K
Enzyme-linked Receptors01:00

Enzyme-linked Receptors

Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
83.7K
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...
4.2K
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...
4.8K
Mitogens and the Cell Cycle02:38

Mitogens and the Cell Cycle

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
7.4K