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Bu W, Shi Y, Huang X, Wu S, Jiang L, Pan C, Li D, Xu Z, Wang H, Chen H, Du J. Rescue of nucleus pulposus cells from an oxidative stress microenvironment via glutathione-derived carbon dots to alleviate intervertebral disc degeneration. J Nanobiotechnology 2024; 22:412. [PMID: 38997713 PMCID: PMC11241859 DOI: 10.1186/s12951-024-02683-2] [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: 05/06/2024] [Accepted: 06/30/2024] [Indexed: 07/14/2024] Open
Abstract
The senescence of nucleus pulposus (NP) cells (NPCs), which is induced by the anomalous accumulation of reactive oxygen species (ROS), is a major cause of intervertebral disc degeneration (IVDD). In this research, glutathione-doped carbon dots (GSH-CDs), which are novel carbon dot antioxidant nanozymes, were successfully constructed to remove large amounts of ROS for the maintenance of NP tissue at the physical redox level. After significantly scavenging endogenous ROS via exerting antioxidant activities, such as superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and total antioxidant capacity, GSH-CDs with good biocompatibility have been demonstrated to effectively improve mitochondrial dysfunction and rescue NPCs from senescence, catabolism, and inflammatory factors in vivo and in vitro. In vivo imaging data and histomorphological indicators, such as the disc height index (DHI) and Pfirrmann grade, demonstrated prominent improvements in the progression of IVDD after the topical application of GSH-CDs. In summary, this study investigated the GSH-CDs nanozyme, which possesses excellent potential to inhibit the senescence of NPCs with mitochondrial lesions induced by the excessive accumulation of ROS and improve the progression of IVDD, providing potential therapeutic options for clinical treatment.
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Affiliation(s)
- Wenzhen Bu
- Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225001, China
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Yu Shi
- Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225001, China
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Xueping Huang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Shang Wu
- Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225001, China
| | - Letao Jiang
- Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225001, China
| | - Chun Pan
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Dandan Li
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Zhuobin Xu
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Huihui Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China.
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, China.
| | - Hao Chen
- Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225001, China.
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, China.
| | - Jianwei Du
- Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225001, China.
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Zhang C, Yang T, Luo X, Zhou X, Feng M, Yuan W. The chromatin accessibility and transcriptomic landscape of the aging mice cochlea and the identification of potential functional super-enhancers in age-related hearing loss. Clin Epigenetics 2024; 16:86. [PMID: 38965562 PMCID: PMC11225416 DOI: 10.1186/s13148-024-01702-1] [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: 03/04/2024] [Accepted: 06/26/2024] [Indexed: 07/06/2024] Open
Abstract
BACKGROUND Presbycusis, also referred to as age-related hearing loss (ARHL), is a condition that results from the cumulative effects of aging on an individual's auditory capabilities. Given the limited understanding of epigenetic mechanisms in ARHL, our research focuses on alterations in chromatin-accessible regions. METHODS We employed assay for transposase-accessible chromatin with high-throughput sequencing (ATAC-seq) in conjunction with unique identifier (UID) mRNA-seq between young and aging cochleae, and conducted integrated analysis as well as motif/TF-gene prediction. Additionally, the essential role of super-enhancers (SEs) in the development of ARHL was identified by comparative analysis to previous research. Meanwhile, an ARHL mouse model and an aging mimic hair cell (HC) model were established with a comprehensive identification of senescence phenotypes to access the role of SEs in ARHL progression. RESULTS The control cochlear tissue exhibited greater chromatin accessibility than cochlear tissue affected by ARHL. Furthermore, the levels of histone 3 lysine 27 acetylation were significantly depressed in both aging cochlea and aging mimic HEI-OC1 cells, highlighting the essential role of SEs in the development of ARHL. The potential senescence-associated super-enhancers (SASEs) of ARHL were identified, most of which exhibited decreased chromatin accessibility. The majority of genes related to the SASEs showed obvious decreases in mRNA expression level in aging HCs and was noticeably altered following treatment with JQ1 (a commonly used SE inhibitor). CONCLUSION The chromatin accessibility in control cochlear tissue was higher than that in cochlear tissue affected by ARHL. Potential SEs involved in ARHL were identified, which might provide a basis for future therapeutics targeting SASEs related to ARHL.
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Affiliation(s)
- Chanyuan Zhang
- Chongqing Medical University, No. 1 Medical College Road, Yuzhong District, Chongqing, 400016, China
- Department of Otolaryngology and Head and Neck, Chongqing General Hospital, Chongqing, 401147, China
| | - Ting Yang
- Chongqing Medical University, No. 1 Medical College Road, Yuzhong District, Chongqing, 400016, China
- Department of Otolaryngology and Head and Neck, Chongqing General Hospital, Chongqing, 401147, China
| | - Xiaoqin Luo
- Hospital of Traditional Chinese Medicine Affiliated to Southwest Medical University, Luzhou, 646099, China
| | - Xiaoqing Zhou
- Department of Otolaryngology and Head and Neck, Chongqing General Hospital, Chongqing, 401147, China
| | - Menglong Feng
- Chongqing Medical University, No. 1 Medical College Road, Yuzhong District, Chongqing, 400016, China
- Department of Otolaryngology and Head and Neck, Chongqing General Hospital, Chongqing, 401147, China
| | - Wei Yuan
- Chongqing Medical University, No. 1 Medical College Road, Yuzhong District, Chongqing, 400016, China.
- Department of Otolaryngology and Head and Neck, Chongqing General Hospital, Chongqing, 401147, China.
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Gao L, Zhao JX, Qin XM, Zhao J. The ethanol extract of Scutellaria baicalensis Georgi attenuates complete Freund's adjuvant (CFA)-induced inflammatory pain by suppression of P2X3 receptor. JOURNAL OF ETHNOPHARMACOLOGY 2023; 317:116762. [PMID: 37301308 DOI: 10.1016/j.jep.2023.116762] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 06/04/2023] [Accepted: 06/07/2023] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Scutellaria baicalensis Georgi (SBG) is a perennial herb with anti-inflammatory, antibacterial, and antioxidant activities, which is traditionally used to treat inflammation of respiratory tract and gastrointestinal tract, abdominal cramps, bacterial and viral infections. Clinically, it is often used to treat inflammatory-related diseases. Research has shown that the ethanol extract of Scutellaria baicalensis Georgi (SGE) has anti-inflammatory effect, and its main components baicalin and baicalein have analgesic effects. However, the mechanism of SGE in relieving inflammatory pain has not been deeply studied. AIM OF THE STUDY This study aimed to evaluate the analgesic effect of SGE on complete Freund's adjuvant (CFA)-induced inflammatory pain rats, and to investigate whether its effect on relieving inflammatory pain is associated with regulation of P2X3 receptor. MATERIALS AND METHODS The analgesic effects of SGE on CFA-induced inflammatory pain rats were evaluated by measuring mechanical pain threshold, thermal pain threshold, and motor coordination ability. The mechanisms of SGE in relieving inflammatory pain were explored by detecting inflammatory factors levels, NF-κB, COX-2 and P2X3 expression, and were further verified by addition of P2X3 receptor agonist (α, β me-ATP). RESULTS Our results revealed that SGE can notably increase the mechanical pain threshold and thermal pain threshold of CFA-induced inflammatory pain rats, and markedly alleviate the pathological damage in DRG. SGE could suppress the release of inflammatory factors including IL-1β, IL-6, TNF-α and restrain the expression of NF-κB, COX-2 and P2X3. Moreover, α, β me-ATP further exacerbated the inflammatory pain of CFA-induced rats, while SGE could markedly raise the pain thresholds and relieve inflammatory pain. SGE could attenuate the pathological damage, inhibit P2X3 expression, inhibit the elevation of inflammatory factors caused by α, β me-ATP. SGE can also inhibit NF-κB and ERK1/2 activation caused by α, β me-ATP, and inhibit the mRNA expression of P2X3, COX-2, NF-κB, IL-1β, IL-6 and TNF-α in DRG of rats induced by CFA coupled with α, β me-ATP. CONCLUSIONS In summary, our research indicated that SGE could alleviate CFA-induced inflammatory pain by suppression of P2X3 receptor.
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Affiliation(s)
- Li Gao
- Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan, 030006, Shanxi, China; The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, China; The Key Laboratory of Effective Substances Research and Utilization in TCM of Shanxi Province, China.
| | - Jin-Xia Zhao
- Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan, 030006, Shanxi, China; The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, China; The Key Laboratory of Effective Substances Research and Utilization in TCM of Shanxi Province, China
| | - Xue-Mei Qin
- Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan, 030006, Shanxi, China; The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, China; The Key Laboratory of Effective Substances Research and Utilization in TCM of Shanxi Province, China
| | - Jing Zhao
- Wolfson Institute for Biomedical Research, University College London, UK, London.
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Gao L, Liu YX, Zhou YZ, Qin XM. Baicalein Attenuates Neuroinflammation in LPS-Treated BV-2 Cells by Inhibiting Glycolysis via STAT3/c-Myc Pathway. Neurochem Res 2023; 48:3363-3377. [PMID: 37277556 DOI: 10.1007/s11064-023-03961-5] [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: 12/27/2022] [Revised: 05/08/2023] [Accepted: 05/23/2023] [Indexed: 06/07/2023]
Abstract
More and more evidence shows that metabolic reprogramming is closely related to the occurrence of AD. The metabolic conversion of oxidative phosphorylation into glycolysis will aggravate microglia-mediated inflammation. It has been demonstrated that baicalein could inhibit neuroinflammation in LPS-treated BV-2 microglial cells, but whether the anti-neuroinflammatory mechanisms of baicalein were related to glycolysis is unclear. Our results depicted that baicalein significantly inhibited the levels of nitric oxide (NO), interleukin-6 (IL-6), prostaglandin 2 (PGE2) and tumor necrosis factor (TNF-α) in LPS-treated BV-2 cells. 1H-NMR metabolomics analysis showed that baicalein decreased the levels of lactic acid and pyruvate, and significantly regulated glycolytic pathway. Further study revealed that baicalein significantly inhibited the activities of glycolysis-related enzymes including hexokinase (HK), 6-phosphate kinase (6-PFK), pyruvate kinase (PK), lactate dehydrogenase (LDH), and inhibited STAT3 phosphorylation and c-Myc expression. By using of STAT3 activator RO8191, we found that baicalein suppressed the increase of STAT3 phosphorylation and c-Myc expression triggered by RO8191, and inhibited the increased levels of 6-PFK, PK and LDH caused by RO8191. In conclusion, these results suggested that baicalein attenuated the neuroinflammation in LPS-treated BV-2 cells by inhibiting glycolysis through STAT3/c-Myc pathway.
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Affiliation(s)
- Li Gao
- Modern Research Center for Traditional Chinese Medicine, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, No. 92, Wucheng Road Xiaodain District, Taiyuan, 030006, Shanxi, China.
- Key Laboratory of Effective Substances Research and Utilization in TCM of Shanxi Province, Taiyuan, 030006, Shanxi, China.
| | - Yu-Xin Liu
- Modern Research Center for Traditional Chinese Medicine, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, No. 92, Wucheng Road Xiaodain District, Taiyuan, 030006, Shanxi, China
- Key Laboratory of Effective Substances Research and Utilization in TCM of Shanxi Province, Taiyuan, 030006, Shanxi, China
| | - Yu-Zhi Zhou
- Modern Research Center for Traditional Chinese Medicine, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, No. 92, Wucheng Road Xiaodain District, Taiyuan, 030006, Shanxi, China
- Key Laboratory of Effective Substances Research and Utilization in TCM of Shanxi Province, Taiyuan, 030006, Shanxi, China
| | - Xue-Mei Qin
- Modern Research Center for Traditional Chinese Medicine, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, No. 92, Wucheng Road Xiaodain District, Taiyuan, 030006, Shanxi, China.
- Key Laboratory of Effective Substances Research and Utilization in TCM of Shanxi Province, Taiyuan, 030006, Shanxi, China.
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Xu Z, Gong B, Li Z, Wang Y, Zhao Z, Xie L, Peng Y, Zhao S, Zhou H, Bian Y. Bazi Bushen alleviates skin senescence by orchestrating skin homeostasis in SAMP6 mice. J Cell Mol Med 2023; 27:2651-2660. [PMID: 37614114 PMCID: PMC10494291 DOI: 10.1111/jcmm.17833] [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: 02/16/2023] [Revised: 06/12/2023] [Accepted: 06/24/2023] [Indexed: 08/25/2023] Open
Abstract
Bazi Bushen, a Chinese-patented drug with the function of relieving fatigue and delaying ageing, has been proven effective for extenuating skin senescence. To investigate the potential mechanism, senescence-accelerated mouse prone 6 (SAMP6) was intragastrically administered with Bazi Bushen for 9 weeks to induce skin homeostasis. Skin homeostasis is important in mitigating skin senescence, and it is related to many factors such as oxidative stress, SASP, apoptosis, autophagy and stem cell. In our study, skin damage in SAMP6 mice was observed using HE, Masson and SA-β-gal staining. The content of hydroxyproline and the activities of SOD, MDA, GSH-PX and T-AOC in the skin were measured using commercial assay kits. The level of SASP factors (IL-6, IL-1β, TNF-α, MMP2 and MMP9) in skin were measured using ELISA kits. The protein expressions of p16, p21, p53, Bax, Bcl-2, Cleaved caspase-3, LC3, p62, Beclin1, OCT4, SOX2 and NANOG were measured by western blotting. The expression of ITGA6 and COL17A1 was measured by immunofluorescence staining and western blotting. Our findings demonstrated that Bazi Bushen alleviated skin senescence by orchestrating skin homeostasis, reducing the level of oxidative stress and the expression of SASP, regulating the balance of apoptosis and autophagy and enhancing the protein expressions of ITGA6 and COL17A1 to improve skin structure in SAMP6 mice. This study indicated that Bazi Bushen could serve as a potential therapy for alleviating skin senescence.
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Affiliation(s)
- Zhe Xu
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Boyang Gong
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Zhaodong Li
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Ying Wang
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Zeyu Zhao
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Lulu Xie
- School of MedicineNankai UniversityTianjinChina
| | - Yanfei Peng
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Shuwu Zhao
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Huifang Zhou
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Yuhong Bian
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
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