1
|
许 云, 苏 征, 郑 林, 张 孟, 谭 珺, 杨 亚, 张 梦, 徐 苗, 陈 铌, 陈 雪, 周 桥. [Read-through circular RNA rt-circ-HS promotes hypoxia inducible factor 1α expression and renal carcinoma cell proliferation, migration and invasiveness]. Beijing Da Xue Xue Bao Yi Xue Ban 2023; 55:217-227. [PMID: 37042131 PMCID: PMC10091263 DOI: 10.19723/j.issn.1671-167x.2023.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Indexed: 04/07/2024]
Abstract
OBJECTIVE To identify and characterize read-through RNAs and read-through circular RNAs (rt-circ-HS) derived from transcriptional read-through hypoxia inducible factor 1α (HIF1α) and small nuclear RNA activating complex polypeptide 1 (SNAPC1) the two adjacent genes located on chromosome 14q23, in renal carcinoma cells and renal carcinoma tissues, and to study the effects of rt-circ-HS on biological behavior of renal carcinoma cells and on regulation of HIF1α. METHODS Reverse transcription-polymerase chain reaction (RT-PCR) and Sanger sequencing were used to examine expression of read-through RNAs HIF1α-SNAPC1 and rt-circ-HS in different tumor cells. Tissue microarrays of 437 different types of renal cell carcinoma (RCC) were constructed, and chromogenic in situ hybridization (ISH) was used to investigate expression of rt-circ-HS in different RCC types. Small interference RNA (siRNA) and artificial overexpression plasmids were designed to examine the effects of rt-circ-HS on 786-O and A498 renal carcinoma cell proliferation, migration and invasiveness by cell counting kit 8 (CCK8), EdU incorporation and Transwell cell migration and invasion assays. RT-PCR and Western blot were used to exa-mine expression of HIF1α and SNAPC1 RNA and proteins after interference of rt-circ-HS with siRNA, respectively. The binding of rt-circ-HS with microRNA 539 (miR-539), and miR-539 with HIF1α 3' untranslated region (3' UTR), and the effects of these interactions were investigated by dual luciferase reporter gene assays. RESULTS We discovered a novel 1 144 nt rt-circ-HS, which was derived from read-through RNA HIF1α-SNAPC1 and consisted of HIF1α exon 2-6 and SNAPC1 exon 2-4. Expression of rt-circ-HS was significantly upregulated in 786-O renal carcinoma cells. ISH showed that the overall positive expression rate of rt-circ-HS in RCC tissue samples was 67.5% (295/437), and the expression was different in different types of RCCs. Mechanistically, rt-circ-HS promoted renal carcinoma cell proliferation, migration and invasiveness by functioning as a competitive endogenous inhibitor of miR-539, which we found to be a potent post-transcriptional suppressor of HIF1α, thus promoting expression of HIF1α. CONCLUSION The novel rt-circ-HS is highly expressed in different types of RCCs and acts as a competitive endogenous inhibitor of miR-539 to promote expression of its parental gene HIF1α and thus the proliferation, migration and invasion of renal cancer cells.
Collapse
Affiliation(s)
- 云屹 许
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 征征 苏
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 林茂 郑
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 孟尼 张
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 珺娅 谭
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院病理研究室,成都 610041Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 亚蓝 杨
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 梦鑫 张
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 苗 徐
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 铌 陈
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院病理研究室,成都 610041Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 雪芹 陈
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院病理研究室,成都 610041Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 桥 周
- 四川大学华西医院病理科,成都 610041Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- 四川大学华西医院病理研究室,成都 610041Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|
2
|
Xu YY, Su ZZ, Zheng LM, Zhang MN, Tan JY, Yang YL, Zhang MX, Xu M, Chen N, Chen XQ, Zhou Q. [Read-through circular RNA rt-circ-HS promotes hypoxia inducible factor 1α expression and renal carcinoma cell proliferation, migration and invasiveness]. Beijing Da Xue Xue Bao Yi Xue Ban 2023; 55:217-227. [PMID: 37042131 PMCID: PMC10091263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
Abstract
OBJECTIVE To identify and characterize read-through RNAs and read-through circular RNAs (rt-circ-HS) derived from transcriptional read-through hypoxia inducible factor 1α (HIF1α) and small nuclear RNA activating complex polypeptide 1 (SNAPC1) the two adjacent genes located on chromosome 14q23, in renal carcinoma cells and renal carcinoma tissues, and to study the effects of rt-circ-HS on biological behavior of renal carcinoma cells and on regulation of HIF1α. METHODS Reverse transcription-polymerase chain reaction (RT-PCR) and Sanger sequencing were used to examine expression of read-through RNAs HIF1α-SNAPC1 and rt-circ-HS in different tumor cells. Tissue microarrays of 437 different types of renal cell carcinoma (RCC) were constructed, and chromogenic in situ hybridization (ISH) was used to investigate expression of rt-circ-HS in different RCC types. Small interference RNA (siRNA) and artificial overexpression plasmids were designed to examine the effects of rt-circ-HS on 786-O and A498 renal carcinoma cell proliferation, migration and invasiveness by cell counting kit 8 (CCK8), EdU incorporation and Transwell cell migration and invasion assays. RT-PCR and Western blot were used to exa-mine expression of HIF1α and SNAPC1 RNA and proteins after interference of rt-circ-HS with siRNA, respectively. The binding of rt-circ-HS with microRNA 539 (miR-539), and miR-539 with HIF1α 3' untranslated region (3' UTR), and the effects of these interactions were investigated by dual luciferase reporter gene assays. RESULTS We discovered a novel 1 144 nt rt-circ-HS, which was derived from read-through RNA HIF1α-SNAPC1 and consisted of HIF1α exon 2-6 and SNAPC1 exon 2-4. Expression of rt-circ-HS was significantly upregulated in 786-O renal carcinoma cells. ISH showed that the overall positive expression rate of rt-circ-HS in RCC tissue samples was 67.5% (295/437), and the expression was different in different types of RCCs. Mechanistically, rt-circ-HS promoted renal carcinoma cell proliferation, migration and invasiveness by functioning as a competitive endogenous inhibitor of miR-539, which we found to be a potent post-transcriptional suppressor of HIF1α, thus promoting expression of HIF1α. CONCLUSION The novel rt-circ-HS is highly expressed in different types of RCCs and acts as a competitive endogenous inhibitor of miR-539 to promote expression of its parental gene HIF1α and thus the proliferation, migration and invasion of renal cancer cells.
Collapse
Affiliation(s)
- Y Y Xu
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Z Z Su
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - L M Zheng
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - M N Zhang
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - J Y Tan
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Y L Yang
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - M X Zhang
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - M Xu
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - N Chen
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - X Q Chen
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Q Zhou
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
- Research Laboratory of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|