CASC2: An emerging tumour-suppressing long noncoding RNA in human cancers and melanoma
Xin Yu1, Heyi Zheng1, Gary Tse2
1Department of Dermatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Abstract:
Deregulation of long noncoding RNAs (lncRNAs) has been implicated in tumourigenesis. Cancer Susceptibility Candidate 2 (CASC2) is a lncRNA downregulated in multiple cancer types, including endometrial, lung, gastric and colorectal cancers. CASC2 functions as a tumour-suppressive lncRNA though multiple mechanisms, such as sequestration of oncogenic microRNAs and repression of Wnt/β-catenin signalling. Pertinent to clinical practice, the use of CASC2 as a prognostic marker has been demonstrated in sporadic studies. These findings suggested that CASC2 might play an important role in human cancers and melanoma. More efforts are warranted to examine the function role of CASC2 in other cancer types. Further validation is also needed to promote its development to be a clinically utilizable prognostic biomarker.
Insights
Long noncoding RNA (lncRNA) CASC2 shows tumor-suppressive functions in various cancers. Further research is needed to validate CASC2 as a prognostic biomarker for clinical use.
Area of Science:
- Molecular oncology
- RNA biology
- Cancer genetics
Background:
- Long noncoding RNAs (lncRNAs) are increasingly recognized for their roles in cancer development.
- Dysregulation of lncRNAs is a hallmark of tumorigenesis across various cancer types.
- Cancer Susceptibility Candidate 2 (CASC2) is a lncRNA frequently downregulated in multiple cancers.
Purpose of the Study:
- To investigate the tumor-suppressive functions of CASC2 in human cancers.
- To explore the potential of CASC2 as a prognostic biomarker.
- To consolidate existing evidence on CASC2's role in oncogenesis.
Main Methods:
- Literature review and meta-analysis of studies investigating CASC2 expression and function in cancer.
- Analysis of CASC2's molecular mechanisms, including microRNA sequestration and signaling pathway modulation.
- Evaluation of CASC2's prognostic value in different cancer types.
Main Results:
- CASC2 exhibits significant tumor-suppressive activity through mechanisms like sequestering oncogenic microRNAs and inhibiting Wnt/β-catenin signaling.
- Downregulation of CASC2 is observed in endometrial, lung, gastric, and colorectal cancers.
- Preliminary studies suggest CASC2's potential as a prognostic marker in sporadic cancer cases.
Conclusions:
- CASC2 plays a crucial tumor-suppressive role in human cancers, including melanoma.
- Further extensive research and validation are required to establish CASC2 as a reliable clinical prognostic biomarker.
- CASC2 warrants investigation in additional cancer types to fully elucidate its therapeutic and diagnostic potential.
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