Circular RNAs regulate cancer-related signaling pathways and serve as potential diagnostic biomarkers for human

Pranavi Garlapati1, Jinjie Ling2, Paul J Chiao1

  • 1Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.

Insights

Circular RNAs (circRNAs) are key regulators in cancer development. This review explores their roles in various cancers, offering insights into potential diagnostic biomarkers and therapeutic targets.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • Circular RNAs (circRNAs) are increasingly recognized for their significant roles in diverse pathological processes, notably in cancer.
  • High-throughput RNA sequencing has revealed differential expression of numerous circRNAs across various cancer cell lines.
  • These circRNAs are implicated in regulating crucial cell signaling pathways through modulation of gene expression.

Purpose of the Study:

  • To elucidate the specific roles of circRNAs in different types of cancer.
  • To understand the molecular mechanisms by which circRNAs influence cellular components.
  • To highlight the potential of circRNAs as diagnostic and prognostic biomarkers and therapeutic targets in oncology.

Main Methods:

  • Review of literature on circRNA expression and function in cancer.
  • Analysis of high-throughput RNA sequencing data identifying differentially expressed circRNAs.
  • Discussion of proposed mechanisms of circRNA-mediated gene regulation.

Main Results:

  • Identification of various circRNAs dysregulated in different cancer types.
  • Elucidation of circRNA involvement in modulating key cancer-related signaling pathways.
  • Demonstration of circRNAs' capacity to upregulate or downregulate specific cellular components.

Conclusions:

  • Circular RNAs play critical roles in cancer pathogenesis.
  • Understanding circRNA functions and expression patterns is vital for cancer research.
  • CircRNAs represent promising candidates for novel cancer biomarkers and therapeutic strategies.

Related Concept Videos

mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
4.0K
The Ras Gene02:38

The Ras Gene

The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a...
6.6K
lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
9.2K
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.8K
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
5.6K
Small GTPases - Ras and Rho01:24

Small GTPases - Ras and Rho

Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:
4.5K