Related Experiment Video

Updated: Feb 16, 2026

Screening for Melanoma Modifiers using a Zebrafish Autochthonous Tumor Model
10:23

Screening for Melanoma Modifiers using a Zebrafish Autochthonous Tumor Model

Published on: November 13, 2012

14.2K

A Novel Polyamine-Targeted Therapy for BRAF Mutant Melanoma Tumors

Molly C Peters1, Allyson Minton2, Otto Phanstiel Iv3

  • 1Lankenau Institute for Medical Research, 100 Lancaster Avenue, Wynnewood, PA 19096, USA. PetersM@mlhs.org.

Medical Sciences (Basel, Switzerland)
|January 6, 2018
PubMed

Insights

Mutant BRAF melanoma cells depend on polyamine transport systems (PTS) for survival. Targeting PTS with arylpolyamine compounds shows promise for overcoming BRAF inhibitor resistance in melanoma.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Mutant serine/threonine protein kinase B-Raf (BRAF) protein is found in over half of all melanoma tumors.
  • BRAF inhibitors (BRAFi) initially treat melanoma effectively, but tumors often develop resistance.
  • Polyamines are crucial for cell survival, and their metabolism is altered in cancer.

Purpose of the Study:

  • To investigate the role of polyamine transport systems (PTS) in mutant BRAF melanoma survival.
  • To evaluate the efficacy of a novel arylpolyamine (AP) compound targeting PTS in melanoma cells.
  • To determine if targeting PTS can overcome resistance to BRAF inhibitors.

Main Methods:

  • Assessed polyamine transport system (PTS) activity in melanoma cells with different BRAF mutational statuses.
  • Evaluated the cytotoxicity of a novel arylpolyamine (AP) compound in melanoma cells.
  • Investigated the effects of polyamine biosynthesis inhibition (using DFMO) on PTS activity and AP sensitivity.
  • Compared the efficacy of BRAFi (PLX4720) in 2D monolayer and 3D spheroid melanoma cultures, with and without AP co-treatment.

Main Results:

  • Mutant BRAF melanoma cells exhibit higher PTS activity and increased sensitivity to the AP compound compared to wild type BRAF (BRAFWT) cells.
  • Inhibiting polyamine biosynthesis with DFMO further enhanced PTS activity and AP sensitivity in mutant BRAF cells.
  • Melanoma spheroids with mutant BRAF showed resistance to PLX4720, but AP co-treatment restored sensitivity.
  • Mutant BRAF melanoma cells are more reliant on PTS for survival, making them more vulnerable to AP compounds.

Conclusions:

  • Melanoma cells with mutant BRAF are uniquely dependent on upregulated polyamine transport systems (PTS).
  • Arylpolyamine (AP) compounds targeting PTS demonstrate significant cytotoxicity against mutant BRAF melanoma.
  • Targeting PTS with AP compounds represents a potential strategy to overcome BRAF inhibitor resistance in melanoma.
Keywords:
melanomamutant BRAFpolyamine transport systempolyaminesα-difluoromethylornithine

More Related Videos

Analysis of Lymph Node Volume by Ultra-High-Frequency Ultrasound Imaging in the Braf/Pten Genetically Engineered Mouse Model of Melanoma08:18

Analysis of Lymph Node Volume by Ultra-High-Frequency Ultrasound Imaging in the Braf/Pten Genetically Engineered Mouse Model of Melanoma

Published on: September 8, 2021

3.4K
A Melanoma Patient-Derived Xenograft Model07:07

A Melanoma Patient-Derived Xenograft Model

Published on: May 20, 2019

13.2K

Related Concept Videos

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
Gene Therapy00:59

Gene Therapy

Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...
27.7K
Group Therapy01:26

Group Therapy

Group therapy is a sociocultural approach to psychological treatment, where individuals with shared psychological challenges come together under the guidance of a mental health professional. This therapeutic modality offers unique opportunities for individuals to connect, share, and grow within the context of a supportive group. By fostering mutual understanding and collaboration, group therapy can address a range of psychological concerns effectively, often complementing or surpassing the...
472
Behavior Therapy01:22

Behavior Therapy

Behavior therapy incorporates diverse techniques rooted in classical conditioning principles to address maladaptive behaviors and anxiety disorders. These methods aim to reduce avoidance behaviors, foster adaptive coping mechanisms, and alter associations between stimuli and responses, making them effective in a wide range of therapeutic contexts.
Exposure therapy is a cornerstone of behavioral treatment for anxiety disorders. It involves systematic exposure to feared stimuli, either in real...
758
Drug Therapy01:28

Drug Therapy

The advent of drug therapy has profoundly shaped modern mental health care, providing targeted treatments for a range of psychological disorders. Psychotherapeutic drugs, classified into antianxiety, antidepressant, and antipsychotic medications, address symptoms across anxiety disorders, mood disorders, and schizophrenia. While these medications have transformed patient outcomes, they require careful management due to their potential side effects and limitations.
Antianxiety Medications
312
Cognitive Therapy01:25

Cognitive Therapy

Cognitive therapy, pioneered by Aaron T. Beck in the 1960s, is a structured approach to addressing psychological distress by focusing on the influence of thoughts on emotions and behaviors. All cognitive therapies involve the basic assumption that human beings have control over their feelings, and that how individuals feel about something depends on how they think about it. Unlike psychoanalytic methods that delve into unconscious processes or humanistic approaches emphasizing...
1.3K