Biochemistry-Not Oncogenes-May Demystify and Defeat Cancer

Area of Science:

• Biochemistry
• Oncology
• Environmental Health

Background:

• Decades of research have failed to identify specific causative genes for most cancers.
• The Cancer Genome Atlas provided extensive data but limited insight into cancer's origins and progression.
• Epidemiological studies increasingly highlight the environment's principal role in cancer etiology.

Purpose of the Study:

• To investigate the role of environmental carcinogens in cancer development.
• To explore the biochemical mechanisms underlying cancer initiation and progression.
• To identify key enzymes involved in cancer, focusing on ribonucleotide reductase (RnR).

Main Methods:

• Review of epidemiological and biochemical studies on cancer causation.
• Analysis of the role of environmental factors, particularly carcinogenic chemicals.
• Focus on the enzyme ribonucleotide reductase (RnR) and its function in DNA synthesis.

Main Results:

• Environmental exposures, including chemicals in food, air, and water, are primary cancer culprits.
• Ribonucleotide reductase (RnR), the rate-limiting enzyme in DNA synthesis, is closely linked to tumor growth.
• RnR's active site is implicated in carcinogen-induced DNA damage, with documented roles in retinoblastoma and HPV-related cervical cancers.

Conclusions:

• Environmental factors play a more significant role in cancer than previously emphasized.
• Targeting the enzyme ribonucleotide reductase (RnR) presents a viable therapeutic strategy for cancer treatment.
• Inhibiting malignant RnR activity can effectively arrest cancer progression.