PMID- 37201048 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230521 IS - 2078-6891 (Print) IS - 2219-679X (Electronic) IS - 2078-6891 (Linking) VI - 14 IP - 2 DP - 2023 Apr 29 TI - NCAPG is transcriptionally regulated by CBX3 and activates the Wnt/beta-catenin signaling pathway to promote proliferation and the cell cycle and inhibit apoptosis in colorectal cancer. PG - 900-912 LID - 10.21037/jgo-23-63 [doi] AB - BACKGROUND: Colorectal cancer (CRC) is highly heterogeneous at the genetic and molecular level and a major contributor to cancer-death worldwide. Non-structural maintenance of chromosomes (SMC) condensin I complex subunit G (NCAPG) is a subunit of condensin I and has been shown to be associated with the prognosis of cancers. This study investigated the functional role of NCAPG in CRC and its mechanism. METHODS: Messenger RNA (mRNA) and protein expressions of NCAPG and chromobox protein homolog 3 (CBX3) were determined by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blot. The proliferation, cycle, and apoptosis of HCT116 cells were analyzed by Cell Counting Kit-8 (CCK-8), flow cytometry, and terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) assay. RT-qPCR and western blot were used to determine the transfection efficacy of short hairpin (sh)-NCAPG and sh-CBX3. Western blot was used to explore cycle-, apoptosis-, and Wnt/beta-catenin signaling-related proteins, and the activity of NCAPG promoter was evaluated using a luciferase report assay. The expressions of cleaved caspase9 and cleaved caspase3 were assessed by colorimetric caspase activity assay. RESULTS: The results showed that NCAPG expression was elevated in CRC cells. After transfection with sh-NCAPG, NCAPG expression was reduced. It was also discovered that NCAPG knockdown suppressed proliferation and the cell cycle but induced apoptosis in HCT116 cells. The Human Transcription Factor Database (HumanTFDB; http://bioinfo.life.hust.edu.cn/HumanTFDB#!/) predicted the binding sites of CBX3 and NCAPG promoters. Meanwhile, the Encyclopedia of RNA Interactomes (ENCORI) database (https://starbase.sysu.edu.cn/) revealed that CBX3 was positively correlated with NCAPG. Our results showed that NCAPG was transcriptionally regulated by CBX3. Additionally, Wnt/beta-catenin signaling was discovered to be activated by CBX3 overexpression. Further experiments showed that NCAPG transcriptionally regulated by CBX3 activated Wnt/beta-catenin signaling to regulate the proliferation, cell cycle, and apoptosis of HCT116 cells. CONCLUSIONS: Collectively, the results of our study indicated that NCAPG was transcriptionally regulated by CBX3 and activated the Wnt/beta-catenin signaling pathway to facilitate the progression of CRC. CI - 2023 Journal of Gastrointestinal Oncology. All rights reserved. FAU - Yang, Hong AU - Yang H AD - Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, China. FAU - Pu, Leilei AU - Pu L AD - Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, China. FAU - Li, Ruobing AU - Li R AD - Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, China. FAU - Zhu, Rong AU - Zhu R AD - Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, China. LA - eng PT - Journal Article DEP - 20230227 PL - China TA - J Gastrointest Oncol JT - Journal of gastrointestinal oncology JID - 101557751 PMC - PMC10186512 OTO - NOTNLM OT - Colorectal cancer (CRC) OT - Wnt/beta-catenin signaling OT - chromobox protein homolog 3 (CBX3) OT - non-structural maintenance of chromosomes condensin I complex subunit G (NCAPG) COIS- Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jgo.amegroups.com/article/view/10.21037/jgo-23-63/coif). The authors have no conflicts of interest to declare. EDAT- 2023/05/18 19:12 MHDA- 2023/05/18 19:13 PMCR- 2023/04/29 CRDT- 2023/05/18 16:54 PHST- 2023/01/03 00:00 [received] PHST- 2023/02/16 00:00 [accepted] PHST- 2023/05/18 19:13 [medline] PHST- 2023/05/18 19:12 [pubmed] PHST- 2023/05/18 16:54 [entrez] PHST- 2023/04/29 00:00 [pmc-release] AID - jgo-14-02-900 [pii] AID - 10.21037/jgo-23-63 [doi] PST - ppublish SO - J Gastrointest Oncol. 2023 Apr 29;14(2):900-912. doi: 10.21037/jgo-23-63. Epub 2023 Feb 27.