Identification of Epigenetically Regulated Genes Distinguishing Intracranial from Extracranial Melanoma Metastases

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

Despite remarkable advances in treating patients with metastatic melanoma, the management of melanoma brain metastases remains challenging. Recent evidence suggests that epigenetic reprogramming is an important mechanism for the adaptation of melanoma cells to the brain environment. In this study, the methylomes and transcriptomes of a cohort of matched melanoma metastases were evaluated by integrated omics data analysis. The identified 38 candidate genes displayed distinct promoter methylation and corresponding gene expression changes in intracranial compared with extracranial metastases. The 11 most promising genes were validated on protein level in both tumor and surrounding normal tissue using immunohistochemistry. In accordance with the underlying promoter methylation and gene expression changes, a significantly different protein expression was confirmed for STK10, PDXK, WDR24, CSSP1, NMB, RASL11B, phosphorylated PRKCZ, PRKCZ, and phosphorylated GRB10 in the intracranial metastases. The observed changes imply a distinct intracranial phenotype with increased protein kinase B phosphorylation and a higher frequency of proliferating cells. Knockdown of PRKCZ or GRB10 altered the expression of phosphorylated protein kinase B and decreased the viability of a brain-specific melanoma cell line. In summary, epigenetically regulated cancer-relevant alterations were identified that provide insights into the molecular mechanisms that discriminate brain metastases from other organ metastases, which could be exploited by targeting the affected signaling pathways.

Details

OriginalspracheEnglisch
Seiten (von - bis)1233-1245.e17
Seitenumfang30
FachzeitschriftJournal of Investigative Dermatology
Jahrgang143
Ausgabenummer7
Frühes Online-Datum27 Jan. 2023
PublikationsstatusVeröffentlicht - Juli 2023
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0001-7499-5125/work/130201217
unpaywall 10.1016/j.jid.2023.01.011
Scopus 85149672475
PubMed 36716920
ORCID /0000-0001-5130-6964/work/142249510
ORCID /0000-0003-4340-9706/work/143497450
ORCID /0000-0003-4340-0402/work/145223793
ORCID /0000-0002-2844-053X/work/153110481

Schlagworte

Ziele für nachhaltige Entwicklung

Schlagwörter

  • Brain Neoplasms/genetics, Brain/metabolism, Humans, Melanoma/pathology, Monomeric GTP-Binding Proteins/metabolism, Protein Serine-Threonine Kinases/metabolism, Proto-Oncogene Proteins c-akt/metabolism

Bibliotheksschlagworte