PIWI-interacting RNAs in human cancer

Area of Science:

• Molecular Biology
• Genetics
• Cancer Research

Background:

• P-element-induced wimpy testis (PIWI) interacting RNAs (piRNAs) are small regulatory RNAs, less studied than microRNAs.
• piRNAs function as 'guardians of the germline' by controlling transposable elements in animal germ cells.
• Their molecular characteristics, including sequence diversity and target-oriented generation, facilitate this role.

Purpose of the Study:

• To review current research on piRNA biogenesis, normal functions, and their association with cancer.
• To highlight the potential of piRNAs as cancer diagnostic/prognostic biomarkers and therapeutic tools.
• To discuss mechanisms of piRNA-mediated target deregulation in cancer initiation and progression.

Main Methods:

• Literature review of current research findings on piRNAs.
• Analysis of piRNA biogenesis and normal functions.
• Examination of aberrant piRNA expression in various malignant tumors and cancer hallmarks.

Main Results:

• Aberrant piRNA and PIWI protein expression is implicated in cancer hallmarks like proliferation, apoptosis inhibition, invasion, metastasis, and stemness.
• Multiple mechanisms of piRNA-mediated target deregulation contribute to cancer initiation, progression, and dissemination.
• piRNAs show potential as diagnostic and prognostic biomarkers and therapeutic agents in oncology.

Conclusions:

• piRNAs are emerging as significant players in cancer biology, with implications for diagnosis and therapy.
• Further research and standardized methodologies are needed to fully realize the clinical potential of piRNAs.
• Interdisciplinary collaboration is encouraged to advance the field of cancer-related piRNA studies.