Fusion Transcript in Head and Neck Cancer

Syllabus: Prelims Unit II - Geography of India

Head and Neck Cancer Overview

• Affects: Mouth, nose, throat, larynx, sinuses, salivary glands
• Global ranking: 6th most common cancer
• Annual new cases: Over 650,000
• Five-year survival rate: Around 50%

Research Background

• Study conducted by: Advanced Centre for Treatment, Research, and Education in Cancer (ACTREC), Mumbai, India
• Key finding: Novel fusion transcript identified in head and neck cancer patients

Fusion Transcript Basics

• Definition: Genetic abnormality where two normally separate genes fuse together
• Cause: Often result of chromosomal translocation
• Significance in cancer: Can produce abnormal proteins driving cancer growth and spread
• Examples: Common in leukemia, lymphoma, sarcoma

UBE3C-LRP5 Fusion Transcript

• Discovered in: Head and neck cancer patients
• Chromosomes involved: 7 and 11
• Mapping: Achieved to single base pair resolution
• Gene functions:
• UBE3C: Part of ubiquitin-proteasome system (protein breakdown)
• LRP5: Involved in Wnt signaling pathway (cell growth and development)

Potential Treatment: Pyrvinium Pamoate

• Drug type: FDA-approved deworming medication
• Original use: Treating parasitic worm infections in humans and animals
• Anti-cancer properties: Recently discovered
• Mechanism: Inhibits Wnt signaling pathway (overactive in many cancers)
• Research findings:
• Effective at inhibiting growth and spread of cancer cells with UBE3C-LRP5 fusion
• Reduced tumor size and improved survival rates in mice with head and neck tumors

Implications for Precision Oncology

• Definition: Tailoring cancer treatments to specific genetic and molecular characteristics
• Benefits:
• More effective treatments
• Fewer side effects
• Significance of study: Identifies potential targeted treatment for specific genetic abnormality in head and neck cancer