Molecular pathogenic pathways in extranodal NK/T cell lymphoma.

Area of Science:

• Oncology
• Molecular Biology
• Immunology

Background:

• Extranodal NK/T cell lymphoma, nasal type (ENKTL) is an aggressive malignancy with poor prognosis.
• Current L-asparaginase-based chemotherapy shows limited efficacy in relapsed or refractory disseminated disease.
• There is a critical need for novel targeted therapies for ENKTL.

Purpose of the Study:

• To review the key molecular and pathogenic pathways in ENKTL.
• To organize these pathways using the "hallmarks of cancer" framework.
• To focus on pathways with significant translational potential for targeted therapy.

Main Methods:

• Literature review of high-throughput molecular and genomic profiling studies in ENKTL.
• Analysis of deregulated signaling pathways, tumor suppressor gene loss, apoptosis deregulation, DNA damage response, and immune evasion mechanisms.
• Integration of findings within the "hallmarks of cancer" framework.

Main Results:

• Identified deregulated pathways: JAK/STAT, PDGF, Aurora kinase, MYC, NF-κB, and EZH2.
• Highlighted the role of tumor suppressor gene loss (PRDM1, PTPRK, FOXO3) and promoter hypermethylation.
• Discussed apoptosis deregulation (p53, survivin), DNA damage response (ATR kinases), and immune evasion (HLA, PD-L1).

Conclusions:

• Molecular profiling has elucidated key oncogenic pathways in ENKTL.
• Targeting these pathways, including immune checkpoint inhibition (PD-1/PD-L1), offers promising therapeutic strategies.
• Further research into these molecular targets is essential for improving ENKTL treatment.