Fibroblast Growth Factor Receptor (FGFR) Inhibitors in Urothelial Cancer

Rohan Garje1,2, Josiah An1,2, Mohammad Obeidat3

  • 1Division of Hematology, Oncology, Blood & Marrow Transplantation, University of Iowa, Iowa City, Iowa, USA.

The Oncologist
|August 14, 2020
PubMed

Insights

Fibroblast growth factor receptor (FGFR) signaling dysregulation drives urothelial carcinoma. FGFR inhibitors, including the approved erdafitinib, show promise, with ongoing trials exploring their efficacy and resistance patterns.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Therapeutics

Background:

  • Dysregulated fibroblast growth factor receptor (FGFR) signaling is implicated in various cancers, notably urothelial carcinoma.
  • Preclinical research demonstrated significant antitumor effects of FGFR inhibitors, prompting clinical investigations.
  • Erdafitinib represents a breakthrough as the first targeted therapy approved for advanced urothelial carcinoma with FGFR alterations.

Purpose of the Study:

  • To review the role of FGFR signaling in oncogenesis.
  • To summarize the clinical trial landscape of FGFR inhibitors.
  • To discuss emerging resistance mechanisms against FGFR-targeted therapies.

Main Methods:

  • Literature review of preclinical and clinical studies on FGFR inhibitors.
  • Analysis of oncogenic signaling pathways driven by FGFR alterations.
  • Synthesis of data from completed and ongoing clinical trials.

Main Results:

  • FGFR inhibitors have demonstrated substantial antitumor activity in urothelial carcinoma.
  • Erdafitinib's FDA approval marks a significant advancement in targeted therapy for FGFR-altered tumors.
  • Ongoing trials continue to yield encouraging results for various FGFR inhibitors.

Conclusions:

  • Targeted inhibition of FGFR signaling is a viable therapeutic strategy for urothelial carcinoma.
  • Understanding resistance patterns is crucial for optimizing long-term treatment outcomes.
  • The development of FGFR inhibitors represents a paradigm shift in cancer treatment.

Related Concept Videos

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...
7.5K
Introduction to Fibroblasts01:09

Introduction to Fibroblasts

Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
3.6K
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...
8.5K
Treatment for Pulmonary Arterial Hypertension: Receptor Tyrosine Kinase Inhibitors and Calcium Channel Blockers01:26

Treatment for Pulmonary Arterial Hypertension: Receptor Tyrosine Kinase Inhibitors and Calcium Channel Blockers

Receptor tyrosine kinase inhibitors (TKIs) and calcium channel blockers (CCBs) are two critical categories of drugs employed in the treatment of pulmonary artery hypertension (PAH). PAH is a disease that causes high blood pressure in the pulmonary arteries, resulting in chest pain, fatigue, and shortness of breath.
TKIs, such as imatinib (Gleevec), are particularly effective in tackling the growth and mitogenic factors that become upregulated in PAH patients. These factors contribute to the...
353
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
3.2K
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.5K