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Wu X, Ban C, Deng W, Bao X, Tang N, Wu Y, Deng Z, Xiong J, Zhao Q. Unveiling the PDK4-centered rituximab-resistant mechanism in DLBCL: the potential of the "Smart" exosome nanoparticle therapy. Mol Cancer 2024; 23:144. [PMID: 39004737 PMCID: PMC11247735 DOI: 10.1186/s12943-024-02057-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Accepted: 06/29/2024] [Indexed: 07/16/2024] Open
Abstract
BACKGROUND Diffuse large B-cell lymphoma (DLBCL) represents a prevalent malignant tumor, with approximately 40% of patients encountering treatment challenges or relapse attributed to rituximab resistance, primarily due to diminished or absent CD20 expression. Our prior research identified PDK4 as a key driver of rituximab resistance through its negative regulation of CD20 expression. Further investigation into PDK4's resistance mechanism and the development of advanced exosome nanoparticle complexes may unveil novel resistance targets and pave the way for innovative, effective treatment modalities for DLBCL. METHODS We utilized a DLBCL-resistant cell line with high PDK4 expression (SU-DHL-2/R). We infected it with short hairpin RNA (shRNA) lentivirus for RNA sequencing, aiming to identify significantly downregulated mRNA in resistant cells. Techniques including immunofluorescence, immunohistochemistry, and Western blotting were employed to determine PDK4's localization and expression in resistant cells and its regulatory role in phosphorylation of Histone deacetylase 8 (HDAC8). Furthermore, we engineered advanced exosome nanoparticle complexes, aCD20@ExoCTX/siPDK4, through cellular, genetic, and chemical engineering methods. These nanoparticles underwent characterization via Dynamic Light Scattering (DLS) and Transmission Electron Microscopy (TEM), and their cellular uptake was assessed through flow cytometry. We evaluated the nanoparticles' effects on apoptosis in DLBCL-resistant cells and immune cells using CCK-8 assays and flow cytometry. Additionally, their capacity to counteract resistance and exert anti-tumor effects was tested in a resistant DLBCL mouse model. RESULTS We found that PDK4 initiates HDAC8 activation by phosphorylating the Ser-39 site, suppressing CD20 protein expression through deacetylation. The aCD20@ExoCTX/siPDK4 nanoparticles served as effective intracellular delivery mechanisms for gene therapy and monoclonal antibodies, simultaneously inducing apoptosis in resistant DLBCL cells and triggering immunogenic cell death in tumor cells. This dual action effectively reversed the immunosuppressive tumor microenvironment, showcasing a synergistic therapeutic effect in a subcutaneous mouse tumor resistance model. CONCLUSIONS This study demonstrates that PDK4 contributes to rituximab resistance in DLBCL by modulating CD20 expression via HDAC8 phosphorylation. The designed exosome nanoparticles effectively overcome this resistance by targeting the PDK4/HDAC8/CD20 pathway, representing a promising approach for drug delivery and treating patients with Rituximab-resistant DLBCL.
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MESH Headings
- Humans
- Exosomes/metabolism
- Lymphoma, Large B-Cell, Diffuse/drug therapy
- Lymphoma, Large B-Cell, Diffuse/metabolism
- Lymphoma, Large B-Cell, Diffuse/pathology
- Lymphoma, Large B-Cell, Diffuse/genetics
- Lymphoma, Large B-Cell, Diffuse/therapy
- Rituximab/pharmacology
- Rituximab/therapeutic use
- Animals
- Mice
- Nanoparticles/chemistry
- Drug Resistance, Neoplasm/drug effects
- Cell Line, Tumor
- Xenograft Model Antitumor Assays
- Pyruvate Dehydrogenase Acetyl-Transferring Kinase/metabolism
- Apoptosis/drug effects
- Gene Expression Regulation, Neoplastic/drug effects
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Affiliation(s)
- Xin Wu
- Department of Spine Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chunmei Ban
- Department of Hematology, Liuzhou People's Hospital affiliated to Guangxi Medical University, Liuzhou, Guangxi, China
| | - Woding Deng
- Xiangya School of Medicine, Central South University, Changsha, China
| | - Xuewei Bao
- Department of Hematology, The Qinghai Provincial People's Hospital, Xining, Qinghai, China
| | - Ning Tang
- Department of Orthopedics, Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yupeng Wu
- Department of Spine Surgery, First Affiliated Hospital of University of South China, Hengyang, Hengyang, Hunan, China
| | - Zhixuan Deng
- Institute of Cell Biology, Hengyang Medical School, University of South China, Hengyang, Hengyang, Hunan, China
| | - Jianbin Xiong
- Department of Orthopaedics, Liuzhou Municipal Liutie Central Hospital, Liuzhou, Guangxi, China
| | - Qiangqiang Zhao
- Department of Hematology, Liuzhou People's Hospital affiliated to Guangxi Medical University, Liuzhou, Guangxi, China.
- Department of Hematology, The Qinghai Provincial People's Hospital, Xining, Qinghai, China.
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Wang W, Zhang D, Sun L, Zhang Z, Zhang Y, Zhang Y, Zhang Y, Zhang M. Alpha-lipoic acid supplementation reverses the declining quality of oocytes exposed to cyclophosphamide. Food Chem Toxicol 2023; 181:114090. [PMID: 37838213 DOI: 10.1016/j.fct.2023.114090] [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: 02/26/2023] [Revised: 09/12/2023] [Accepted: 10/04/2023] [Indexed: 10/16/2023]
Abstract
Cyclophosphamide (CY) is a chemotherapeutic drug that is commonly used to treat malignancies of the ovary, breast, and hematology, as well as autoimmune disorders. As a cofactor of mitochondrial multienzyme complexes, alpha lipoic acid (ALA) is well known for its antioxidant characteristics, which operate directly on the scavenging of reactive oxygen species (ROS) and indirectly on the intracellular recycling of other antioxidants. However, the underlying mechanisms through which CY exerts its toxic effects on meiosis and oocyte quality, as well as a viable approach for protecting oocyte quality and preserving fertility, remain unknown. In present study, immunostaining and fluorescence intensity quantification were applied to assess the effects of CY and ALA supplementation on the key processes during the oocyte meiotic maturation. Our results show that supplementing oocytes with ALA, a well-known antioxidant and free radical scavenger, can reverse CY-induced oocyte meiotic maturation failure. Specifically, we found that CY exposure caused oocyte meiotic failure by disrupting meiotic organelle dynamics and arrangement, as well as a prominently impaired cytoskeleton assembly. In addition, CY caused an abnormal distribution of mitochondrion and cortical granules, two indicators of oocyte cytoplasmic maturation. More importantly, we show that ALA supplementation effectively reverses CY-induced meiotic failure and oocyte quality decline by suppressing oxidative stress-induced DNA damage and apoptosis in oocytes. Collectively, our data reveal that ALA supplementation is a feasible approach to protect oocytes from CY-exposed deterioration, providing a better understanding of the mechanisms involved in chemotherapy-induced meiotic failure.
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Affiliation(s)
- Wei Wang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Dandan Zhang
- Department of Reproductive Medicine, General Hospital of WanBei Coal Group, Suzhou, 234000, China
| | - Lei Sun
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Zihao Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yiwen Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yongteng Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yunhai Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.
| | - Mianqun Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.
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Li P, Gao C, Chen Z. Effect of Bone Marrow Mesenchymal Stem Cells (BMSCs) with High miR-183-5p Expression on Ovarian Cancer Cells by Regulating Signal Transducer and Activator of Transcription 3 (STAT3). J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.3093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Currently, the treatment for ovarian cancer (OC) is not satisfactory. The microRNAs may have an important function in tumor pathogenesis. miR-183-5p involves in several tumors. However, its effect on OC cells is unclear. The BMSCs could regulate the micro-environment of tumor and participate
in tumor procession. In this study, effect of BMSCs with highly-expressed miR-183-5p on OC cells was assessed. The BMSCs with highly-expressed miR-183-5p was established and co-cultivated with OC cell line SKOV3 followed by measuring miR-183-5p level by PCR, STAT3 and ADAM9 expression by western
blot. miR-183-5p level in OC cells was reduced and further decreased after co-culture with BMSCs along with enhance cell proliferation and upregulated STAT3 expression (P < 0.05). In addition, miR-183-5p level was increased in BMSCs with highly-expressed miR-183-5p and STAT3 expression
was reduced along with restrained cell proliferation (P < 0.05). In conclusion, miR-183-5p in OC cells is downregulated and malignant biological behaviors of OC cells are restrained by BMSCs with highly-expressed miR-183-5p possibly through regulating the expression of STAT3.
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Affiliation(s)
- Peiyi Li
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Huizhou Municipal Central Hospital, Huizhou, Guangdong, 516000, China
| | - Caifeng Gao
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Huizhou Municipal Central Hospital, Huizhou, Guangdong, 516000, China
| | - Zhiyun Chen
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Huizhou Municipal Central Hospital, Huizhou, Guangdong, 516000, China
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Shi L, Zhang Z, Deng M, Zheng F, Liu W, Ye S. Biological mechanisms and applied prospects of mesenchymal stem cells in premature ovarian failure. Medicine (Baltimore) 2022; 101:e30013. [PMID: 35960112 PMCID: PMC9371578 DOI: 10.1097/md.0000000000030013] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Premature ovarian failure (POF), also known as primary ovarian insufficiency (POI), refers to the loss of ovarian function in women after puberty and before the age of 40 characterized by high serum gonadotropins and low estrogen, irregular menstruation, amenorrhea, and decreased fertility. However, the specific pathogenesis of POF is unexplained, and there is no effective therapy for its damaged ovarian tissue structure and reduced reserve function. Mesenchymal stem cells (MSCs), with multidirectional differentiation potential and self-renewal ability, as well as the cytokines and exosomes they secrete, have been studied and tested to play an active therapeutic role in a variety of degenerative pathologies, and MSCs are the most widely used stem cells in regenerative medicine. MSCs can reverse POI and enhance ovarian reserve function through differentiation into granulosa cells (GCs), immune regulation, secretion of cytokines and other nutritional factors, reduction of GCs apoptosis, and promotion of GCs regeneration. Many studies have proved that MSCs may have a restorative effect on the structure and fertility of injured ovarian tissues and turn to be a useful clinical approach to the treatment of patients with POF in recent years. We intend to use MSCs-based therapy to completely reverse POI in the future.
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Affiliation(s)
- Lan Shi
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, People’s Republic of China
| | - Zhifen Zhang
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, People’s Republic of China
- Department of Obstetrics and Gynecology, Hangzhou Women’s Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang Province, People’s Republic of China
- *Correspondence: Zhifen Zhang, Department of Obstetrics and Gynecology, Hangzhou women’s Hospital, No.369 Kunpeng Road, Shangcheng Districs, Hangzhou, Zhejiang Province, 310008, People’s Republic of China (e-mail: )
| | - Miao Deng
- Department of Obstetrics and Gynecology, Hangzhou Women’s Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang Province, People’s Republic of China
| | - Fangyuan Zheng
- Department of Obstetrics and Gynecology, Hangzhou Women’s Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang Province, People’s Republic of China
| | - Wenhua Liu
- Department of Obstetrics and Gynecology, Hangzhou Women’s Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang Province, People’s Republic of China
| | - Shujin Ye
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, People’s Republic of China
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