Related Experiment Video

Updated: Feb 25, 2026

Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence
10:09

Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence

Published on: January 7, 2019

8.8K

FBXO4 inhibits lung cancer cell survival by targeting Mcl-1 for degradation

C Feng1, F Yang1, J Wang1

  • 1Department of Thoracic Surgery, Peking University People's Hospital, Beijing, China.

Cancer Gene Therapy
|August 5, 2017
PubMed

Insights

FBXO4 targets Mcl-1 (myeloid cell leukemia 1) for degradation, impacting lung cancer cell survival and chemotherapy resistance. This discovery reveals a new mechanism controlling Mcl-1 levels in cancer.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Mcl-1 (myeloid cell leukemia 1) is a prosurvival protein frequently overexpressed in lung cancer.
  • The mechanisms driving Mcl-1 overexpression in lung cancer remain largely undefined.
  • Mcl-1 inhibits apoptosis, promoting cancer cell survival and therapeutic resistance.

Purpose of the Study:

  • To elucidate the molecular mechanisms regulating Mcl-1 protein levels in lung cancer.
  • To investigate the role of F-box proteins in Mcl-1 stability and lung cancer progression.

Main Methods:

  • Analysis of Mcl-1 and FBXO4 expression correlation in lung cancer cell lines and patient samples.
  • Investigation of FBXO4's E3 ubiquitin ligase activity towards Mcl-1.
  • Assessment of cell survival and drug resistance following Fbxo4 knockdown or overexpression.

Main Results:

  • Mcl-1 protein levels inversely correlate with FBXO4 expression in lung cancer.
  • FBXO4 directly interacts with Mcl-1, promoting its ubiquitination and degradation.
  • Fbxo4 knockdown increases Mcl-1 levels, enhancing cell survival and chemotherapy resistance.

Conclusions:

  • FBXO4 acts as an E3 ubiquitin ligase that governs Mcl-1 protein stability.
  • The FBXO4-Mcl-1 axis is a critical regulator of cell survival in lung cancer.
  • Targeting the FBXO4-Mcl-1 interaction may offer novel therapeutic strategies for lung cancer.

More Related Videos

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis11:44

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

Published on: March 30, 2019

8.1K
Subcellular Fractionation of Primary Chronic Lymphocytic Leukemia Cells to Monitor Nuclear/Cytoplasmic Protein Trafficking11:39

Subcellular Fractionation of Primary Chronic Lymphocytic Leukemia Cells to Monitor Nuclear/Cytoplasmic Protein Trafficking

Published on: October 23, 2019

12.2K

Related Concept Videos

The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
8.8K
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...
5.3K
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...
9.0K
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...
6.1K