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Zhou X, Zhang C, Yu H, Feng Z, Bai X, Mei Y, Li L, Li X, Gou X, Deng Y. The MEF2A/SNHG16/miR-425-5p/NOTCH2 axis induces gemcitabine resistance by inhibiting ferroptosis in the starving bladder tumor microenvironment. Cell Signal 2024:111337. [PMID: 39121977 DOI: 10.1016/j.cellsig.2024.111337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 07/27/2024] [Accepted: 08/05/2024] [Indexed: 08/12/2024]
Abstract
Gemcitabine resistance is one of the leading causes of bladder cancer (BCa) recurrence and progression. The dysregulation of ferroptosis is involved in this process; however, the underlying mechanisms remain unclear. In the current study, we found a prominent increase in long non-coding RNA (lncRNA) small nucleolar RNA host gene 16 (SNHG16) in tumor samples, which was related to advanced tumor grade and poor prognosis. SNHG16 is overexpressed in the starving tumor microenvironment (STME) and induces gemcitabine resistance by inhibiting ferroptosis in BCa. SNHG16 knockdown promotes ferroptosis and increases chemosensitivity to gemcitabine. Mechanistically, the transcription factor MEF2A was markedly upregulated in the STME, facilitating SNHG16 expression. SNHG16 acts as a competing endogenous RNA that sponges miR-425-5p and promotes NOTCH2 expression. SNHG16/miR-425-5p/NOTCH2 is demonstrated, for the first time, to suppress ferroptosis by inducing SLC7A11 and GPX4 expression in vitro and in vivo. Upregulation of miR-425-5p reverses NOTCH2-mediated inhibition of ferroptosis, thereby mitigating gemcitabine resistance. In conclusion, these findings reveal that the STME-activated MEF2A/SNHG16/miR-425-5p/NOTCH2 axis induces gemcitabine resistance by inhibiting ferroptosis and implicate SNHG16 as a potential therapeutic target for chemoresistance.
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Affiliation(s)
- Xiang Zhou
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Chunlin Zhang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Haitao Yu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Zhenwei Feng
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Xuesong Bai
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Yuhua Mei
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Li Li
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Xinyuan Li
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xin Gou
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
| | - Yuanzhong Deng
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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Ji Q, Ma F, Zhang X, Liu Y, Wang P, Li M. Hsa_circ_0005320 affects cell proliferation and the cell cycle via the IGF2BP3/CDK2 axis in bladder cancer. Cell Signal 2024; 119:111154. [PMID: 38565412 DOI: 10.1016/j.cellsig.2024.111154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/16/2024] [Accepted: 03/29/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Circular RNAs (circRNAs), which are covalently closed non-coding RNAs, are frequently dysregulated in cancer. However, their precise role in bladder cancer (BCa) remains largely unknown. METHODS Expression of hsa_circ_0005320 in tissues and cell lines was detected using quantitative real-time PCR. Proliferation and colony forming capacity of BCa cells were assessed using Cell Counting Kit-8, ethynyl-labeled deoxyuridine, and colony formation assays. The cell cycle was analyzed using flow cytometry. Protein expression of insulin-like growth factor II mRNA-binding protein 3 (IGF2BP3) and cyclin dependent kinase 2 (CDK2) was examined using western blots. The binding of RNA and protein was validated using RNA immunoprecipitation. Additionally, xenograft tumor models were established to validate the function of hsa_circ_0005320 in vivo. RESULTS We screened hsa_circ_0005320 from previous high-throughput sequencing and found that it was highly expressed in BCa tissues and associated with tumor differentiation and depth of invasion in BCa patients. Through functional experiments, we demonstrated that hsa_circ_0005320 promoted cell proliferation and regulated the cell cycle. Mechanistically, hsa_circ_0005320 interacted with and upregulated the expression of IGF2BP3, which binds to and enhances the stability of CDK2 mRNA. Furthermore, knockdown of hsa_circ_0005320 resulted in a reduction in tumor burden in vivo. CONCLUSIONS Collectively, these findings highlight the pro-oncogenic role of hsa_circ_0005320 in BCa through the IGF2BP3/CDK2 axis, providing valuable insights into the mechanism of circRNAs in tumor progression.
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Affiliation(s)
- Quansong Ji
- Department of Urology, the Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Feilu Ma
- Teaching Center for Basic Medical Experiment of China Medical University, Shen yang, Liaoning, China
| | - Xiling Zhang
- Department of Urology, the Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yili Liu
- Department of Urology, the Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Ping Wang
- Department of Urology, the Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Mingshan Li
- Department of Urology, the Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China.
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Chen C, Wang B, Zhao X, Luo Y, Fu L, Qi X, Ying Z, Chen L, Wang Q, Sun S, Chen D, Kang P. Lithium Promotes Osteogenesis via Rab11a-Facilitated Exosomal Wnt10a Secretion and β-Catenin Signaling Activation. ACS APPLIED MATERIALS & INTERFACES 2024; 16:30793-30809. [PMID: 38833412 DOI: 10.1021/acsami.4c04199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Both bone mesenchymal stem cells (BMSCs) and their exosomes suggest promising therapeutic tools for bone regeneration. Lithium has been reported to regulate BMSC function and engineer exosomes to improve bone regeneration in patients with glucocorticoid-induced osteonecrosis of the femoral head. However, the mechanisms by which lithium promotes osteogenesis have not been elucidated. Here, we demonstrated that lithium promotes the osteogenesis of BMSCs via lithium-induced increases in the secretion of exosomal Wnt10a to activate Wnt/β-catenin signaling, whose secretion is correlated with enhanced MARK2 activation to increase the trafficking of the Rab11a and Rab11FIP1 complexes together with exosomal Wnt10a to the plasma membrane. Then, we compared the proosteogenic effects of exosomes derived from lithium-treated or untreated BMSCs (Li-Exo or Con-Exo) both in vitro and in vivo. We found that, compared with Con-Exo, Li-Exo had superior abilities to promote the uptake and osteogenic differentiation of BMSCs. To optimize the in vivo application of these hydrogels, we fabricated Li-Exo-functionalized gelatin methacrylate (GelMA) hydrogels, which are more effective at promoting osteogenesis and bone repair than Con-Exo. Collectively, these findings demonstrate the mechanism by which lithium promotes osteogenesis and the great promise of lithium for engineering BMSCs and their exosomes for bone regeneration, warranting further exploration in clinical practice.
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Affiliation(s)
- Changjun Chen
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan 250014, China
| | - Baoning Wang
- Department of Microbiology, West China of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xin Zhao
- Department of Orthopedic Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250014, China
| | - Yue Luo
- Department of Orthopedic Surgery, North Sichuan Medical College, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - Li Fu
- Research Core Facility, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xin Qi
- Department of Neurosurgery and Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhendong Ying
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan 250014, China
| | - Liyile Chen
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qiuru Wang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Shuo Sun
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Dailing Chen
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan 250014, China
| | - Pengde Kang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
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Kozlowski P. Thirty Years with ERH: An mRNA Splicing and Mitosis Factor Only or Rather a Novel Genome Integrity Protector? Cells 2023; 12:2449. [PMID: 37887293 PMCID: PMC10605862 DOI: 10.3390/cells12202449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/10/2023] [Accepted: 10/12/2023] [Indexed: 10/28/2023] Open
Abstract
ERH is a 100 to about 110 aa nuclear protein with unique primary and three-dimensional structures that are very conserved from simple eukaryotes to humans, albeit some species have lost its gene, with most higher fungi being a noteworthy example. Initially, studies on Drosophila melanogaster implied its function in pyrimidine metabolism. Subsequently, research on Xenopus laevis suggested that it acts as a transcriptional repressor. Finally, studies in humans pointed to a role in pre-mRNA splicing and in mitosis but further research, also in Caenorhabditis elegans and Schizosaccharomyces pombe, demonstrated its much broader activity, namely involvement in the biogenesis of mRNA, and miRNA, piRNA and some other ncRNAs, and in repressive heterochromatin formation. ERH interacts with numerous, mostly taxon-specific proteins, like Mmi1 and Mei2 in S. pombe, PID-3/PICS-1, TOST-1 and PID-1 in C. elegans, and DGCR8, CIZ1, PDIP46/SKAR and SAFB1/2 in humans. There are, however, some common themes in this wide range of processes and partners, such as: (a) ERH homodimerizes to form a scaffold for several complexes involved in the metabolism of nucleic acids, (b) all these RNAs are RNA polymerase II transcripts, (c) pre-mRNAs, whose splicing depends on ERH, are enriched in transcripts of DNA damage response and DNA metabolism genes, and (d) heterochromatin is formed to silence unwanted transcription, e.g., from repetitive elements. Thus, it seems that ERH has been adopted for various pathways that serve to maintain genome integrity.
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Affiliation(s)
- Piotr Kozlowski
- Department of Molecular Biology, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
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Wang Y, Wang Z, Wu X, Zhu S, Guo Q, Jin Z, Chen Z, Zhang D, Hu W, Xu H, Shi L, Yang L, Wang Y. Paeonol Promotes Reendothelialization After Vascular Injury Through Activation of c-Myc/VEGFR2 Signaling Pathway. Drug Des Devel Ther 2023; 17:1567-1582. [PMID: 37249931 PMCID: PMC10225138 DOI: 10.2147/dddt.s403134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 05/02/2023] [Indexed: 05/31/2023] Open
Abstract
Purpose Dysfunction of endothelium is associated with multiple pathological vascular diseases. However, how to regulate reendothelialization after vascular injury is not well defined. This study aims to determine whether and how Paeonol controls reendothelialization following artery injury. Methods The endothelium of murine carotid artery was denuded by catheter guide wires injury. H&E staining and IF staining were performed to determine whether Paeonol is critical for reendothelialization. BRDU Incorporation Assay, Boyden Chamber Migration Assay, Tube Formation Assay, and Spheroid Sprouting Assay were used to investigate whether Paeonol is involved in regulating proliferation and migration of endothelial cells. The underlying mechanism of how Paeonol regulates reendothelialization was determined by Molecular docking simulation and CO-IP Assay. Results Paeonol treatment significantly inhibits neointima formation in carotid artery ligation model by promoting proliferation and migration of endothelial cells. Mechanistically, Paeonol enhances c-Myc expression, consequently interacts with VEGFR2 results in activating VEGF signaling pathway, and eventually promotes reendothelialization after vascular injury. Conclusion Our data demonstrated that Paeonol plays a critical role in regulating vascular reendothelialization, which may be therapeutically used for treatment of pathological vascular diseases.
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Affiliation(s)
- Yang Wang
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Zheng Wang
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Xiao Wu
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Song Zhu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Qiru Guo
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Zhong Jin
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Zixian Chen
- School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Delai Zhang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Wangming Hu
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Huan Xu
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Liangqin Shi
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Lan Yang
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
| | - Yong Wang
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China
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Ma H, Yu H, Li Z, Cao Z, Du Y, Dai J, Zhi D, Xu Y, Li N, Wang J. β-Carboline dimers inhibit the tumor proliferation by the cell cycle arrest of sarcoma through intercalating to Cyclin-A2. Front Immunol 2022; 13:922183. [PMID: 36325324 PMCID: PMC9618858 DOI: 10.3389/fimmu.2022.922183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 09/30/2022] [Indexed: 12/04/2022] Open
Abstract
β-Carbolines are potentially strong alkaloids with a wide range of bioactivities, and their dimers exhibit stronger antitumor activity other than the monomers. However, the detailed mechanisms of the β-carboline dimers in inhibiting sarcoma (SARC) remain unclear. The results showed that β-carboline-3-carboxylic acid dimers Comp1 and Comp2, which were synthesized in our lab and modified at the N9 position and linked at the C3 position, exhibited effective inhibition activity on MG-63 proliferation (IC50 = 4.6μM). Meanwhile, the large scale transcriptome profiles of SARC from The Cancer Genome Atlas (TCGA) were analyzed, and found that abnormal expression of genes relevant to apoptosis, cell cycle, and signaling pathways of Hedgehog, HIF, Ras involved in the SARC pathogenesis. Interestingly, both dimers could promote the apoptosis and arrest the cell cycle in S phase to inhibit proliferation of MG-63. Moreover, Comp1 and Comp2 inhibited the expression CDK2, CCNA2, DBF4, and PLK1 associated with various immune cells and cell cycle in MG-63. Remarkably, drug-target interaction network analysis showed that numerous proteins involved in cell cycle were the potential targets of Comp1 and Comp2, especially CCNA2. Further molecular docking, isothermal titration calorimetry (ITC) and Cellular Thermal Shift Assay (CETSA) confirmed that both dimers could directly interact with CCNA2, which is significantly correlated with CD4+ T cells, by strong hydrophobic interactions (Kd=5.821 ×106 N). Meanwhile, the levels of CCNA2 and CDK2 were inhibited to decrease in MG-63 by both dimer treatments at transcription and protein levels, implying that Comp1 and Comp2 blocked the interaction between CCNA2 and CDK2 through competitive binding with CCNA2 to arrest the cell cycle of MG-63 cells in the S phase. Additionally, the transcriptome profiles of β-carboline-treated mice from Gene Expression Omnibus (GEO) were obtained, and found that similar antitumor mechanism was shared among β-carboline derivatives. Overall, our results elucidated the antitumor mechanisms of Comp1 and Comp2 through dual-suppressing the function of CCNA2 to profoundly arrest cell cycle of MG-63, then effectively inhibited cell proliferation of MG-63. These results provide new insights into the antitumor mechanism of β-carboline dimers and new routes of various novel cancer-related drug targets for future possible cancer therapy.
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Affiliation(s)
- Huiya Ma
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
| | - Hongzhi Yu
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
| | - Zhengyang Li
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
| | - Zhi Cao
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
| | - Youwei Du
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Jiangkun Dai
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
| | - Dongming Zhi
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
| | - Yujie Xu
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
| | - Na Li
- Instrumental Analysis Center, Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Junru Wang, ; Na Li,
| | - Junru Wang
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, China
- *Correspondence: Junru Wang, ; Na Li,
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