1
|
Han Y, Meng J, Ling X, Pan Z, Zhang H, Zhong B, Chen S, Pang J, Ma Y, Chen J, Liu L. DNMT1 regulates hypermethylation and silences hsa_circ_401351 in hydroquinone-induced malignant TK6 cells. Environ Toxicol 2024; 39:2092-2101. [PMID: 38108535 DOI: 10.1002/tox.24089] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 11/18/2023] [Accepted: 12/01/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Benzene and its metabolite hydroquinone (HQ) are widely used in daily life, and long-term exposure to benzene or HQ can induce acute myeloid leukemia (AML). Circular RNAs (circRNAs) are mostly produced by reverse splicing of gene exon mRNA precursors. The modulation of circRNA expression is connected to leukemia progression; however, the molecular mechanism is still unknown. MATERIALS AND METHODS In this study, the cells were divided into four groups: PBS control group (PBS-TK6), TK6 malignantly transformed cells induced by 10.0 μmol/L HQ (HQ-TK6), and HQ-TK6 cells treated with 5 μmol/L 5-AzaC (DNA methyltransferase inhibitor) for 24 h (HQ + 5-AzaC). HQ-TK6 cells were treated with 200 nmol/L TSA (histone deacetylation inhibitor) for 24 h (HQ + TSA). qRT-PCR was used to identify the differential hsa_circ_401351 expression between the four groups. We further determined the hsa_circ_401351 promoter methylation level with methylation-specific PCR. DNMT1 and DNMT3b were knocked down by CRISPR/Cas9 to elucidate the specific molecular mechanism of hsa_circ_401351 in HQ-TK6 cells. CCK-8 and flow cytometry detected cell proliferation and apoptosis, respectively, after hsa_circ_401351 was overexpressed in HQ-TK6 cells. RESULTS Compared with the PBS-TK6 group, the expression of hsa_circ_401351 was found to be lower in the HQ-TK6 group. Nevertheless, treatment with 5-AzaC or TSA increased hsa_circ_401351 expression, with the upregulation being more pronounced in the TSA group. The expression of hsa_circ_401351 in the DNMT1 knockdown group was dramatically increased by 50% compared to that in the control group, and the DNA methylation level of the hsa_circ_401351 promoter region was decreased. When hsa_circ_401351 was overexpressed, HQ-TK6 cell proliferation was significantly slowed after 48 h compared with the control group. Flow cytometry showed that cells were mainly arrested in G1 phase, and apoptosis was significantly enhanced. Similarly, qRT-PCR and Western blot data showed significant reductions in Caspase-3 mRNA and protein production, and Bcl-2 mRNA levels were also elevated. CONCLUSIONS Overall, our research showed that elevated DNMT1 expression in HQ-TK6 cells increased methylation levels and decreased expression of the hsa_circ_401351 promoter region, limiting its ability to suppress HQ-TK6 cell growth and enhance apoptosis.
Collapse
Affiliation(s)
- Yali Han
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Jinxue Meng
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Xiaoxuan Ling
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Zhijie Pan
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Haiqiao Zhang
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Hospital Infection Management, Dongguan Maternal and Child Health Care Hospital, Dongguan, People's Republic of China
| | - Bohuan Zhong
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Shi Chen
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Jing Pang
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Yuliang Ma
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Jialong Chen
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Linhua Liu
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| |
Collapse
|
2
|
Yu L, Qiu W, Gao Y, Sun M, Chen L, Cui Z, Zhu D, Guo P, Tang H, Luo H. JNK1 activated pRb/E2F1 and inhibited p53/p21 signaling pathway is involved in hydroquinone-induced pathway malignant transformation of TK6 cells by accelerating the cell cycle progression. Environ Toxicol 2023; 38:2344-2351. [PMID: 37347496 DOI: 10.1002/tox.23870] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 06/05/2023] [Indexed: 06/23/2023]
Abstract
Hydroquinone (HQ) is an important metabolites of benzene in the body, and it has been found to result in cellular DNA damage, mutation, cell cycle imbalance, and malignant transformation. The JNK1 signaling pathway plays an important role in DNA damage repair. In this study, we focused on whether the JNK1 signaling pathway is involved in the HQ-induced cell cycle abnormalities and the underlying mechanism. The results showed that HQ induced abnormal progression of the cell cycle and initiated the JNK1 signaling pathway. We further confirmed that JNK1 suppression decelerated the cell cycle progression through inhibiting pRb/E2F1 signaling pathway and triggering p53/p21 pathway. Therefore, we concluded that JNK1 might be involved in HQ-induced malignant transformation associated with activating pRb/E2F1 and inhibiting p53/p21 signaling pathway which resulting in accelerating the cell cycle progression.
Collapse
Affiliation(s)
- Lingxue Yu
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Weifeng Qiu
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Yuting Gao
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Mingwei Sun
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
- Faculty of Medicine, Macau University of Science and Technology, Macao, China
| | - Lin Chen
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Zheming Cui
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Delong Zhu
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Pu Guo
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| | - Huanwen Tang
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
| | - Hao Luo
- Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, China
| |
Collapse
|
3
|
Chen J, Zheng D, Cai Z, Zhong B, Zhang H, Pan Z, Ling X, Han Y, Meng J, Li H, Chen X, Zhang H, Liu L. Increased DNMT1 Involvement in the Activation of LO2 Cell Death Induced by Silver Nanoparticles via Promoting TFEB-Dependent Autophagy. Toxics 2023; 11:751. [PMID: 37755761 PMCID: PMC10537645 DOI: 10.3390/toxics11090751] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/29/2023] [Accepted: 09/01/2023] [Indexed: 09/28/2023]
Abstract
The accumulation of exogenous silver nanoparticles (AgNPs) will terminally bring about liver injury, including cell death, where DNA methylation tends to be a crucial epigenetic modulator. The change in the cell autophagy level verified to be closely associated with hepatocyte death has been followed with wide interest. But the molecular toxicological mechanisms of AgNPs in relation to DNA methylation, autophagy, and cell death remain inconclusive. To address the issue above, in LO2 cells treated with increasing concentrations of AgNPs (0, 5, 10, and 20 μg/mL), a cell cytotoxicity assay was performed to analyze the level of cell death, which also helped to choose an optimal concentration for next experiments. An immunofluorescence assay was used to determine the autophagic flux as well as TFEB translocation, with qRT-PCR and western blot being used to analyze the expression level of autophagy-related genes and proteins. According to our findings, in the determination of cell viability, 20 μg/mL (AgNPs) was adopted as the best working concentration. LO2 cell death, autophagy, and TFEB nuclear translocation were induced by AgNPs, which could be inhibited by lysosome inhibitor chloroquine (CQ) or siRNA specific for TFEB. Moreover, AgNP exposure led to DNA hypermethylation, with DNMT1 taking part mainly, which could be obviously prevented by 5-Aza-2'-deoxycytidine (5-AzaC) or trichostatin A (TSA) treatment or DNMT1 knockout in LO2 cells. Our studies suggest that through TFEB-dependent cell autophagy, increased DNMT1 may facilitate cell death induced by AgNPs.
Collapse
Affiliation(s)
- Jialong Chen
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China;
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Dongyan Zheng
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Ziwei Cai
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Bohuan Zhong
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Haiqiao Zhang
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Zhijie Pan
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Xiaoxuan Ling
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Yali Han
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Jinxue Meng
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Huifang Li
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Xiaobing Chen
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - He Zhang
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China;
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| | - Linhua Liu
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China;
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (D.Z.); (Z.C.); (B.Z.); (H.Z.); (Z.P.); (X.L.); (Y.H.); (J.M.); (H.L.); (X.C.)
| |
Collapse
|
4
|
Zhu Y, Feng J, Wan R, Huang W. CAR T Cell Therapy: Remedies of Current Challenges in Design, Injection, Infiltration and Working. Drug Des Devel Ther 2023; 17:1783-1792. [PMID: 37337518 PMCID: PMC10277020 DOI: 10.2147/dddt.s413348] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/06/2023] [Indexed: 06/21/2023] Open
Abstract
Chimeric antigen receptor (CAR) T cell therapy, as an innovative immunotherapy, plays a huge role in current cancer therapy. Although CAR T cell therapy has demonstrated therapeutic effects in some subtypes of B cell leukemia or lymphoma, there are many challenges that limit the therapeutic efficacy of CAR T cells in solid tumors. And how to efficiently transport CAR T cells to tumor tissues is a continuing concern for us. In this review, experiments have been extensively studied and compared. We finally compared the influence of different injection methods on therapeutic efficacy. We also carefully explored the difficulties of designing, homing, and working of CAR T cells, and ultimately came up with better solutions for each process to help CAR T cells reach tumor tissue more efficiently and quickly. These results will have significant implications for guiding CAR T cell therapy in cancer treatment.
Collapse
Affiliation(s)
- Yuxuan Zhu
- The First Clinical Medical School, Southern Medical University, Guangzhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, People’s Republic of China
| | - Jianguo Feng
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, People’s Republic of China
| | - Rongxue Wan
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, People’s Republic of China
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, People’s Republic of China
| | - Wenhua Huang
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, People’s Republic of China
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, People’s Republic of China
- Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, Guangzhou, People’s Republic of China
| |
Collapse
|
5
|
Mu Q, Yao K, Syeda MZ, Zhang M, Cheng Q, Zhang Y, Sun R, Lu Y, Zhang H, Luo Z, Huang H, Liu X, Luo C, Zhu X, Wu S, Cui L, Huang C, Chen X, Tang L. Ligustrazine Nanoparticle Hitchhiking on Neutrophils for Enhanced Therapy of Cerebral Ischemia-Reperfusion Injury. Adv Sci (Weinh) 2023:e2301348. [PMID: 37078794 DOI: 10.1002/advs.202301348] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/19/2023] [Indexed: 05/03/2023]
Abstract
Ischemic stroke is a refractory disease that endangers human health and safety owing to cerebral ischemia. Brain ischemia induces a series of inflammatory reactions. Neutrophils migrate from the circulatory system to the site of cerebral ischemia and accumulate in large numbers at the site of inflammation across the blood-brain barrier. Therefore, hitchhiking on neutrophils to deliver drugs to ischemic brain sites could be an optimal strategy. Since the surface of neutrophils has a formyl peptide receptor (FPR), this work modifies a nanoplatform surface by the peptide cinnamyl-F-(D)L-F-(D)L-F (CFLFLF), which can specifically bind to the FPR receptor. After intravenous injection, the fabricated nanoparticles effectively adhered to the surface of neutrophils in peripheral blood mediated by FPR, thereby hitchhiking with neutrophils to achieve higher accumulation at the inflammatory site of cerebral ischemia. In addition, the nanoparticle shell is composed of a polymer with reactive oxygen species (ROS)-responsive bond breaking and is encased in ligustrazine, a natural product with neuroprotective properties. In conclusion, the strategy of hitching the delivered drugs to neutrophils in this study could improve drug enrichment in the brain, thereby providing a general delivery platform for ischemic stroke or other inflammation-related diseases.
Collapse
Affiliation(s)
- Qingchun Mu
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Kai Yao
- Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Madiha Zahra Syeda
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Min Zhang
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, China
| | - Qian Cheng
- Basic Medical College, Guilin Medical University, Guilin, 541199, China
| | - Yufei Zhang
- Basic Medical College, Guilin Medical University, Guilin, 541199, China
| | - Rui Sun
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Screening, Southern Medical University, Guangzhou, 510515, China
| | - Yuting Lu
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, China
| | - Huamiao Zhang
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, China
| | - Zhicheng Luo
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Hanning Huang
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Xiaojing Liu
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Chunmei Luo
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Xiulong Zhu
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Shuyu Wu
- Department of Neurosurgery, Hainan General Hospical, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, China
| | - Liao Cui
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, China
| | - Chunming Huang
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| | - Xiaoyuan Chen
- Departments of Diagnostic Radiology, and Surgery, Clinical Imaging Research Centre, Centre for Translational Medicine, Nanomedicine Translational Research Program, NUS Center for Nanomedicine, Yong Loo Lin School of Medicine, Departments of Chemical and Biomolecular Engineering, and Biomedical Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117597, Singapore
| | - Longguang Tang
- The People's Hospital of Gaozhou, Guangdong Medical University, Maoming, 525200, China
| |
Collapse
|
6
|
Li XS, Liang XY, Liu MS, Wang QL, Zhan HH, Xu ZP, Liu L, Huang YM, Yang MX, Luo H. Five New C 21 -Steroidal Sapogenins from the Acid Hydrolysate of Cynanchum otophyllum Roots. Chem Biodivers 2023; 20:e202300082. [PMID: 36729050 DOI: 10.1002/cbdv.202300082] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/02/2023] [Accepted: 02/02/2023] [Indexed: 02/03/2023]
Abstract
Five new C21 -steroidal sapogenins (1-5) named cynotogenins J-N, were isolated from the acid hydrolysate of Cynanchum otophyllum roots. Their structures were established by extensive spectroscopic analysis (UV, IR, HR-ESI-MS, and NMR). Most notably, compounds 1-3 harboring a rare 5β,6β-epoxy group in the C21 -steroidal skeleton of Cynanchum plants. All compounds were evaluated for their cytotoxicities against multiple cancer cell lines, in which compounds 5 showed weak cytotoxicity against HepG2 cancer cells with IC50 values of 44.90 μM.
Collapse
Affiliation(s)
- Xiao-San Li
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
- Marine Biomedical Research Institute, the Key Lab of Zhanjiang for R&D Marine Microbial Resources in the Beibu Gulf Rim, Guangdong Medical University, Zhanjiang, 524023, P. R. China
| | - Xiao-Yan Liang
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
- Marine Biomedical Research Institute, the Key Lab of Zhanjiang for R&D Marine Microbial Resources in the Beibu Gulf Rim, Guangdong Medical University, Zhanjiang, 524023, P. R. China
| | - Ming-Shang Liu
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
| | - Qi-Lin Wang
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
| | - He-Hui Zhan
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
| | - Zhi-Peng Xu
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P.R. China
| | - Li Liu
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
| | - Yong-Mei Huang
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
- Marine Biomedical Research Institute, the Key Lab of Zhanjiang for R&D Marine Microbial Resources in the Beibu Gulf Rim, Guangdong Medical University, Zhanjiang, 524023, P. R. China
| | - Mao-Xun Yang
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
- Marine Biomedical Research Institute, the Key Lab of Zhanjiang for R&D Marine Microbial Resources in the Beibu Gulf Rim, Guangdong Medical University, Zhanjiang, 524023, P. R. China
| | - Hui Luo
- Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, 523808, P. R. China
- Marine Biomedical Research Institute, the Key Lab of Zhanjiang for R&D Marine Microbial Resources in the Beibu Gulf Rim, Guangdong Medical University, Zhanjiang, 524023, P. R. China
| |
Collapse
|
7
|
Lin Y, Zhang Q, Wang T, Zeng Z. Effect of living arrangements on cognitive function in Chinese elders: a longitudinal observational study. BMJ Open 2022; 12:e050410. [PMID: 36202581 PMCID: PMC9540837 DOI: 10.1136/bmjopen-2021-050410] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE To examine how living arrangement as a social contextual factor can affect Chinese elders' cognitive function. SETTING AND PARTICIPANTS Our sample consists of 2486 Chinese elders from two waves (2014 and 2018) of the Chinese Longitudinal Healthy Longevity Survey (CLHLS) that was administered in 22 of China's 31 provinces using a multi-stage, disproportionate, purposive random sampling method. The CLHLS aims to better understand the determinants of healthy longevity in China and collects extensive data on a large population of fragile elders aged 80-112 in China. OUTCOME MEASURES Cognitive function was measured by the Mini-Mental State Examination (MMSE). Living arrangement was divided into living in an institution, living alone and living with household members. Generalised linear regressions were carried out to examine the associations between baseline characteristics and cognitive function, while controlling age, gender and residential area. RESULTS A total of 2486 participants were included in the study at baseline in 2014. Of these, 1162 (46.7%) were men and 1324 (53.3%) were women. The mean age at baseline was 75.07 (±8.31) years. The mean years of schooling were 2.86 (±3.68). The number (proportion) of the three living arrangements (lived in institutions, lived alone and lived with household members) were 93 (3.8%), 463 (18.6%) and 1930 (77.6%), respectively. Among all participants, cognitive function declined over time. Those who lived alone presented with the highest MMSE scores at baseline and showed the lowest decline after 4 years. Living arrangements had significant effects on decreasing cognitive function. CONCLUSION Chinese elders living in institutions were most vulnerable to cognitive decline. Living alone was not a risk condition in itself for the elderly in terms of cognitive decline. In addition, the benefits of living with household members to support cognitive function were not found in our study.
Collapse
Affiliation(s)
- Yanwei Lin
- Department of Health Sociology, School of Humanities and Management, Guangdong Medical University, Dongguan, Guangdong, China
- Institute of Public Health and Wellness, Guangdong Medical University, Dongguan, Guangdong, China
| | - Qi Zhang
- School of Community and Environmental Health, Old Dominion University, Norfolk, Virginia, USA
| | - Tingxian Wang
- School of public health, Guangdong Medical University, Dongguan, Guangdong, China
| | - Zhirong Zeng
- Institute of Public Health and Wellness, Guangdong Medical University, Dongguan, Guangdong, China
| |
Collapse
|
8
|
Ma L, Zheng X, Lin R, Sun AR, Song J, Ye Z, Liang D, Zhang M, Tian J, Zhou X, Cui L, Liu Y, Liu Y. Knee Osteoarthritis Therapy: Recent Advances in Intra-Articular Drug Delivery Systems. Drug Des Devel Ther 2022; 16:1311-1347. [PMID: 35547865 PMCID: PMC9081192 DOI: 10.2147/dddt.s357386] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 04/17/2022] [Indexed: 12/12/2022] Open
Abstract
Drug delivery for osteoarthritis (OA) treatment is a continuous challenge because of their poor bioavailability and rapid clearance in joints. Intra-articular (IA) drug delivery is a common strategy and its therapeutic effects depend mainly on the efficacy of the drug-delivery system used for OA therapy. Different types of IA drug-delivery systems, such as microspheres, nanoparticles, and hydrogels, have been rapidly developed over the past decade to improve their therapeutic effects. With the continuous advancement in OA mechanism research, new drugs targeting specific cell/signaling pathways in OA are rapidly evolving and effective drug delivery is critical for treating OA. In this review, recent advances in various IA drug-delivery systems for OA treatment, OA targeted strategies, and related signaling pathways in OA treatment are summarized and analyzed based on current publications.
Collapse
Affiliation(s)
- Luoyang Ma
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
- Marine Medical Research Institute of Zhanjiang, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Xiaoyan Zheng
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
- Zhanjiang Central Hospital, Guangdong Medical University, Zhanjiang city, Guangdong province, 524045, People's Republic of China
| | - Rui Lin
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Antonia RuJia Sun
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen City, Guangdong Province, 518055, People’s Republic of China
| | - Jintong Song
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Zhiqiang Ye
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Dahong Liang
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Min Zhang
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Jia Tian
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Xin Zhou
- Marine Medical Research Institute of Zhanjiang, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Liao Cui
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Yuyu Liu
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
| | - Yanzhi Liu
- Guangdong Provincial Key Laboratory for Research and Development of Natural Drug, School of Pharmacy, Guangdong Medical University, Zhanjiang City, Guangdong Province, 524023, People’s Republic of China
- Zhanjiang Central Hospital, Guangdong Medical University, Zhanjiang city, Guangdong province, 524045, People's Republic of China
- Shenzhen Osteomore Biotechnology Co., Ltd., Shenzhen city, Guangdong Province, 518118, People’s Republic of China
- Correspondence: Yanzhi Liu; Yuyu Liu, Tel +86-759-2388405; +86-759-2388588, Email ;
| |
Collapse
|