GNAQ/11 mutant nonuveal melanoma: same same but different.

Br J Dermatol

Department of Dermatology, University Medical Center Freiburg, Freiburg, 79104, Germany.

Published: November 2020

Download full-text PDF

Source
http://dx.doi.org/10.1111/bjd.19335DOI Listing

Publication Analysis

Top Keywords

gnaq/11 mutant
4
mutant nonuveal
4
nonuveal melanoma
4
gnaq/11
1
nonuveal
1
melanoma
1

Similar Publications

Melanoma arising in association with a blue nevus (BN) is rare but has molecular similarities to uveal melanoma (UM), including GNAQ/11 mutations. Tebentafusp was recently approved for UM based on improved overall survival in a phase 3 study. We hypothesized that tebentafusp may be active in BN-associated melanoma.

View Article and Find Full Text PDF
Article Synopsis
  • * The cancer's molecular mechanisms are not well understood, but mutations in the GNAQ and GNA11 genes are prevalent, and a specific signaling pathway is crucial for tumor development.
  • * Current therapies for metastatic uveal melanoma (MUM) are limited, though research is focused on targeted drugs and immunotherapies, with an emphasis on identifying genetic mutations for predicting metastasis risk and guiding treatment decisions.
View Article and Find Full Text PDF
Article Synopsis
  • Constitutive activation of GNAQ/11 is the primary oncogenic event in uveal melanoma (UM), but directly targeting these genes hasn't proven feasible due to their essential cellular functions.
  • Research indicated that inhibiting EHMT2, a specific protein, significantly decreased cancer cell growth and movement, with higher levels of EHMT2 associated with worse patient outcomes in UM.
  • The study suggests that targeting both EHMT2 and GNAQ/11 pathways could provide an effective therapeutic strategy for UM by disrupting their roles in cancer progression.
View Article and Find Full Text PDF

Activating mutations in GNAQ/GNA11 occur in over 90% of uveal melanomas (UMs), the most lethal melanoma subtype; however, targeting these oncogenes has proven challenging and inhibiting their downstream effectors show limited clinical efficacy. Here, we performed genome-scale CRISPR screens along with computational analyses of cancer dependency and gene expression datasets to identify the inositol-metabolizing phosphatase INPP5A as a selective dependency in GNAQ/11-mutant UM cells in vitro and in vivo. Mutant cells intrinsically produce high levels of the second messenger inositol 1,4,5 trisphosphate (IP3) that accumulate upon suppression of INPP5A, resulting in hyperactivation of IP3-receptor signaling, increased cytosolic calcium and p53-dependent apoptosis.

View Article and Find Full Text PDF

Uveal melanoma (UM) is the most common primary intraocular malignant tumor type in adults. Even after the treatment of the ocular tumor, the prognosis of patients with metastasis remains poor. Hence, an urgent unmet need exists to identify novel approaches to treat advanced UM.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!