1
|
Tuluwengjiang G, Rasulova I, Ahmed S, Kiasari BA, Sârbu I, Ciongradi CI, Omar TM, Hussain F, Jawad MJ, Castillo-Acobo RY, Hani T, Lakshmaiya N, Samaniego SSC. Dendritic cell-derived exosomes ( Dex): Underlying the role of exosomes derived from diverse DC subtypes in cancer pathogenesis. Pathol Res Pract 2024; 254:155097. [PMID: 38277745 DOI: 10.1016/j.prp.2024.155097] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/01/2024] [Accepted: 01/02/2024] [Indexed: 01/28/2024]
Abstract
Exosomes are nanometric membrane vesicles of late endosomal origin that are released by most, if not all, cell types as a sophisticated means of intercellular communication. They play an essential role in the movement of materials and information between cells, transport a variety of proteins, lipids, RNA, and other vital data, and over time, they become an essential part of the drug delivery system and a marker for the early detection of many diseases. Dendritic cells have generated interest in cancer immunotherapy due to their ability to initiate and modify effective immune responses. Apart from their cytokine release and direct interactions with other cell types, DCs also emit nanovesicles, such as exosomes, that contribute to their overall activity. Numerous studies have demonstrated exosomes to mediate and regulate immune responses against cancers. Dendritic cell-derived exosomes (DCs) have attracted a lot of attention as immunotherapeutic anti-cancer treatments since it was found that they contain functional MHC-peptide complexes along with a variety of other immune-stimulating components that together enable immune cell-dependent tumor rejection. By enhancing tumor and immunosuppressive immune cells or changing a pro-inflammatory milieu to inhibit tumor advancement, exosomes generated from dendritic cells can initiate and support tumor growth. This study reviewed the immunogenicity of dendritic cell-derived exosomes and strategies for expanding their immunogenic potential as novel and effective anti-cancer therapies.
Collapse
Affiliation(s)
| | - Irodakhon Rasulova
- Senior Researcher, School of Humanities, Natural & Social Sciences, New Uzbekistan University, 54 Mustaqillik Ave., Tashkent, 100007, Uzbekistan; Department of Public Health, Samarkand State Medical University, Amir Temur street 18, Samarkand, Uzbekistan
| | - Shamim Ahmed
- Department of Pharmaceutical Sciences, North South University, Bashundhara, Dhaka 1229, Bangladesh
| | - Bahman Abedi Kiasari
- Microbiology & Immunology Group, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Ioan Sârbu
- 2nd Department of Surgery-Pediatric Surgery and Orthopedics, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania.
| | - Carmen Iulia Ciongradi
- 2nd Department of Surgery-Pediatric Surgery and Orthopedics, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania.
| | - Thabit Moath Omar
- Department of Medical Laboratory Technics, Al-Noor University College, Nineveh, Iraq
| | - Farah Hussain
- Medical Technical College, Al-Farahidi University, Iraq
| | | | | | - Thamer Hani
- Dentistry Department, Al-Turath University College, Baghdad, Iraq
| | - Natrayan Lakshmaiya
- Department of Mechanical Engineering, Saveetha School of Engineering, SIMATS, Chennai, Tamil Nadu, India
| | | |
Collapse
|
2
|
Diao S, Wang D, Chang Y, Ni C, Fu D, Liu J, Gao S, Jia X, Wang T, Nan X, Cao H, Liu Z, Zhang X. Clinical study of the combined use of dexmedetomidine and remifentanil in patients with coronary heart disease undergoing 3D laparoscopic surgery with EEG bispectral index monitoring. Int J Clin Exp Pathol 2023; 16:378-385. [PMID: 38188350 PMCID: PMC10767478] [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] [Received: 06/03/2023] [Accepted: 11/03/2023] [Indexed: 01/09/2024]
Abstract
OBJECTIVE This study sought to investigate the safety and clinical outcomes associated with the combined administration of dexmedetomidine (Dex) and remifentanil (Rem) in patients with coronary heart disease undergoing three-dimensional (3D) laparoscopic surgery, with concurrent monitoring of the electroencephalography (EEG) bispectral index. METHODS This study is of a retrospective nature and involved a total of 60 patients with coronary heart disease who underwent 3D laparoscopic surgery at our hospital between June 2020 and September 2021. In a double-blind manner, these patients were randomly assigned to two groups: the control group (Group I), which consisted of 30 patients, and the treatment group (Group II) receiving a combination of Dex and Rem, also comprising 30 patients. The study's primary objective was to compare and assess the treatment outcomes in these two patient groups. RESULTS Patients in Group II who developed postoperative coronary heart disease experienced a significant reduction in blood pressure, heart rate, and electrocardiogram values (P<0.05). Additionally, Group II exhibited lower bispectral index (BIS) and visual analog scale (VAS) values (P<0.05). CONCLUSION In patients with coronary heart disease undergoing 3D laparoscopic surgery, the intraoperative use of Dex combined with Rem anesthesia offers several advantages. It helps stabilize hemodynamics, reducing the risk of myocardial ischemia, and significantly alleviates postoperative pain, all without increasing the likelihood of adverse postoperative reactions. Furthermore, this approach effectively dampens the intraoperative and postoperative stress response, facilitating enhanced recovery after surgery (ERAS). Overall, the clinical impact is positive, safe, and reliable.
Collapse
Affiliation(s)
- Shiqi Diao
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Dongxin Wang
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Ying Chang
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Chunyan Ni
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Dongmei Fu
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Jixin Liu
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Song Gao
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Xiunan Jia
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Tongrao Wang
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Xi Nan
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Hongling Cao
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Zongming Liu
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| | - Xitong Zhang
- Department of Anesthesiology, Jilin Cancer Hospital Changchun 130000, Jilin, P. R. China
| |
Collapse
|
3
|
Liu Q, Yuan W, Yan Y, Jin B, You M, Liu T, Gao M, Li J, Gokulnath P, Vulugundam G, Li G, Xu B, Xiao J. Identification of a novel small-molecule inhibitor of miR-29b attenuates muscle atrophy. Mol Ther Nucleic Acids 2023; 31:527-540. [PMID: 36891498 PMCID: PMC9988425 DOI: 10.1016/j.omtn.2023.02.003] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 02/01/2023] [Indexed: 02/05/2023]
Abstract
Muscle atrophy is debilitating and can be induced by several stressors. Unfortunately, there are no effective pharmacological treatment until now. MicroRNA (miR)-29b is an important target that we identified to be commonly involved in multiple types of muscle atrophy. Although sequence-specific inhibition of miR-29b has been developed, in this study, we report a novel small-molecule miR-29b inhibitor that targets miR-29b hairpin precursor (pre-miR-29b) (Targapremir-29b-066 [TGP-29b-066]) considering both its three-dimensional structure and the thermodynamics of interaction between pre-miR-29b and the small molecule. This novel small-molecule inhibitor has been demonstrated to attenuate muscle atrophy induced by angiotensin II (Ang II), dexamethasone (Dex), and tumor necrosis factor α (TNF-α) in C2C12 myotubes, as evidenced by increase in the diameter of myotube and decrease in the expression of Atrogin-1 and MuRF-1. Moreover, it can also attenuate Ang II-induced muscle atrophy in mice, as evidenced by a similar increase in the diameter of myotube, reduced Atrogin-1 and MuRF-1 expression, AKT-FOXO3A-mTOR signaling activation, and decreased apoptosis and autophagy. In summary, we experimentally identified and demonstrated a novel small-molecule inhibitor of miR-29b that could act as a potential therapeutic agent for muscle atrophy.
Collapse
Affiliation(s)
- Qi Liu
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Weilin Yuan
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Yuwei Yan
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Bing Jin
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Mengke You
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, China
| | - Tianqi Liu
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, China
| | - Mingchun Gao
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
| | - Jin Li
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Priyanka Gokulnath
- Cardiovascular Division of the Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | | | - Guoping Li
- Cardiovascular Division of the Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Bin Xu
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai 200444, China
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, China
- Corresponding author Bin Xu, Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China.
| | - Junjie Xiao
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai 200444, China
- Corresponding author Junjie Xiao, Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China.
| |
Collapse
|
4
|
Wu S, Zhong C, Huang A, Li J, Chen C, Yuan H. Feasibility of epidural injection of ropivacaine and dexamethasone for labor analgesia in women with preeclampsia. Am J Transl Res 2021; 13:7921-7927. [PMID: 34377271 PMCID: PMC8340229] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/12/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVE This study aimed to investigate the feasibility of epidural injection of ropivacaine (Rop) and dexamethasone (Dex) for labor analgesia in women with preeclampsia. METHODS A total of 80 women with preeclampsia delivered in our hospital were enrolled, and were divided into a study group (n=41, Rop + Dex) and a control group (n=39, Rop alone). The changes in pain level, sedation, catecholamine hormone levels and vital signs were compared between the two groups after intervention. The motor blockade score and the incidence of adverse reactions after administration of anesthesia were compared in both groups. RESULTS Pain level [visual analogue scale (VAS) score], sedation (Ramsay score), adrenaline (AD), norepinephrine (NE), heart rate (HR), and mean arterial pressure (MAP) did not differ significantly between the two groups at pre-analgesia (T0) (P>0.05), and Ramsay score in the study group was significantly higher than that in the control group at 30 min (T1), 60 min (T2), 120 min after analgesia (T3), and cessation of analgesia (T4), and VAS score, AD, NE, HR, MAP in the study group were significantly lower than those in the control group during all stages of labor. CONCLUSION The epidural injection of Rop + Dex in women with preeclampsia can play a better analgesic and sedative effect, stabilize maternal hemodynamic index and improve postpartum motor blockade.
Collapse
Affiliation(s)
- Shengyang Wu
- Department of Anesthesiology, Yichun People's Hospital Yichun 336000, Jiangxi Province, China
| | - Changgen Zhong
- Department of Anesthesiology, Yichun People's Hospital Yichun 336000, Jiangxi Province, China
| | - Ailian Huang
- Department of Anesthesiology, Yichun People's Hospital Yichun 336000, Jiangxi Province, China
| | - Jianhua Li
- Department of Anesthesiology, Yichun People's Hospital Yichun 336000, Jiangxi Province, China
| | - Chuanfeng Chen
- Department of Anesthesiology, Yichun People's Hospital Yichun 336000, Jiangxi Province, China
| | - Haibo Yuan
- Department of Anesthesiology, Yichun People's Hospital Yichun 336000, Jiangxi Province, China
| |
Collapse
|
5
|
Lv G, Zhu G, Xu M, Gao X, Xiao Q. Inhibition of carrageenan-induced dental inflammatory responses owing to decreased TRPV1 activity by Dexmedetomidine. J Inflamm (Lond) 2020; 17:18. [PMID: 32377171 PMCID: PMC7195724 DOI: 10.1186/s12950-020-00245-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 03/31/2020] [Indexed: 02/07/2023]
Abstract
Background Dexmedetomidine (Dex) is a highly selective agonist of the α2 adrenergic receptor and a common sedative; however, its anti-inflammatory effect has been studied. In this study, the inhibitory effect of Dex on inflammation in dental pulp cells was assessed. For this, the effect of Dex on inflammation induced by carrageenan (Car) in human dental pulp cells (hDPCs) was evaluated. Car incubation induced a robust inflammatory response in hDPCs as well as activation of PKA–STAT3 and PKC–nuclear factor kappa B (NF-κB) signaling pathways. Results Dex reduced the expression of inflammatory cytokines in a dose-dependent manner. Meanwhile, the phosphorylation of PKA, PKC, STAT3, and NF-κB as well as the nuclear accumulation of STAT3 and NF-κB were significantly increased in Dex-treated Car-induced hDPCs. Western blotting results also showed that the phosphorylation level of transient receptor potential cation channel subfamily V member 1 (TRPV1) was downregulated as a result of Dex treatment. Furthermore, we found that administration of the TRPV1 agonist capsaicin (Cap) reversed the effects of Dex on proinflammatory cytokines; however, the expression and activation of PKA–STAT3 and PKC–NF-κB signals were not altered owing to Cap administration. Conclusions These results indicate that Dex plays a defensive role in dental pulp inflammation by regulating the TRPV1 channel and can be used as a potential target for human dental pulp inflammation intervention.
Collapse
Affiliation(s)
- Gang Lv
- Department of anesthesiology, Rizhao People's Hospital, Rizhao, Shandong China
| | - Guanhua Zhu
- 2Department of Anesthesiology, Jingzhou Central Hospital, Jingzhou, Hubei China
| | - Maohua Xu
- Department of anesthesiology, Rizhao People's Hospital, Rizhao, Shandong China
| | - Xingping Gao
- Department of stomatology, Rizhao People's Hospital, No. 126 Tai'an Road, Donggang District, Rizhao, 276800 China
| | - Qingfeng Xiao
- 4Department of Stomatology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, No. 136, Jingzhou Street, Xiangyang, Hubei China
| |
Collapse
|
6
|
Jihua C, Cai C, Xubin B, Yue Y. Effects of Dexmedetomidine on the RhoA /ROCK/ Nox4 Signaling Pathway in Renal Fibrosis of Diabetic Rats. Open Med (Wars) 2019; 14:890-898. [PMID: 31844679 PMCID: PMC6884926 DOI: 10.1515/med-2019-0105] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 08/20/2019] [Indexed: 12/13/2022] Open
Abstract
Objective To investigate the effects and mechanisms of dexmedetomidine (Dex) on model rats of diabetic nephropathy (DN). Methods Rats were divided into NC, model, Dex-L (1μg/ kg), Dex-M (5μg/kg) and Dex-H (10μg/kg) groups. Rats in all groups except in the NC group were injected with streptozotocin (STZ) combined with right nephrectomy. Rats in Dex (1, 5 and 10μg/kg) groups received gavage with Dex (1, 5 and 10μg/kg). After 4 weeks, rats were sacrificed and kidneys were collected. HE staining was performed for a renal injury. Masson staining was applied to detect the fibrotic accumulation in rat kidney. Radioimmunoassay was used to test the renal function. Immunohistochemical method was used to detect protein expressions of RhoA, p-MYPT and Nox4 in rat kidney. Results Compared with the NC group, the levels of urine microalbumin in protein, α1-MG and β2-MG, renal fibrotic accumulation, RhoA, p-MYPT, Nox4 and α-SMA in model group increased significantly (P<0.001, respectively). Compared with the model group, Dex low, medium and high groups improved the deposition of renal fiber in rats, inhibited the expression levels of microalbumin, α1-MG and β2-MG in urine and decreased expression of RhoA, p-MYPT, Nox4 and α-SMA proteins (P<0.05, P<0.01). Conclusion Dex is possible to inhibit the expression of α-SMA and renal fibrous substance deposition in rat kidney via RhoA/ROCK/Nox4 signaling pathway, thereby reducing early kidney damage in model rats.
Collapse
Affiliation(s)
- Chen Jihua
- Department of anesthesiology, Fenghua District People's Hospital, Ningbo City, Zhejiang Province, Philippines
| | - Chen Cai
- Department of anesthesiology, Fenghua District People's Hospital, Ningbo City, Zhejiang Province, Philippines
| | - Bao Xubin
- Department of anesthesiology, Fenghua District People's Hospital, Ningbo City, Zhejiang Province, Philippines
| | - Yu Yue
- Department of anesthesiology, Fenghua District People's Hospital, Ningbo City, Zhejiang Province, Philippines
| |
Collapse
|
7
|
Zou W, Niu C, Fu Z, Gong C. PNS-R1 inhibits Dex-induced bronchial epithelial cells apoptosis in asthma through mitochondrial apoptotic pathway. Cell Biosci 2019; 9:18. [PMID: 30891181 PMCID: PMC6388479 DOI: 10.1186/s13578-019-0279-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 02/01/2019] [Indexed: 12/04/2022] Open
Abstract
Dexamethasone (Dex) are widely used for the treatment of asthma. However, they may cause apoptosis of bronchial epithelial cells and delay the recovery of asthma. Therefore, it is an urgent problem to find effective drugs to reduce this side effects. Panax notoginseng saponins R1 (PNS-R1) is known to exhibit anti-oxidative and anti-apoptotic properties in many diseases. We aim to investigate whether PNS-R1 can reduce Dex-induced apoptosis in bronchial epithelial cells. In this study, the anti-apoptotic effects of PNS-R1 were investigated by conducting in vitro and in vivo. Annexin V-FITC/PI staining flow cytometry analysis and TUNEL assay were conducted to detect apoptotic cells. Mitochondrial membrane potential was detected by JC-1 analysis. Western blotting and immunohistochemical analysis were conducted to measure caspase3, Bcl-2, Bax, Cyt-c, Apaf-1, cleaved-caspase3 and cleaved-caspase9 levels in lung tissues and 16HBE cells. Our findings demonstrated that Dex could induce apoptosis of bronchial epithelial cells and upregulate caspase3 expression of lung tissues. Western blot showed that Dex increased Bax, Cyt-c, Apaf-1, cleaved-caspase9, cleaved-caspase3 expression and decreased Bcl-2 expression. PNS-R1 could suppress Dex-induced apoptosis of bronchial epithelial cells by inhibiting Bax, Cyt-c, Apaf-1, cleaved-caspase9, cleaved-caspase3 expression and upregulating Bcl-2 expression. Flow cytometry analysis showed PNS-R1 alleviated JC-1 positive cells induced by Dex in 16HBE cells. These results showed that PNS-R1 alleviated Dex-induced apoptosis in bronchial epithelial cells by inhibition of mitochondrial apoptosis pathway. Furthermore, our findings highlighted the potential use of PNS-R1 as an adjuvant drug to treat asthma.
Collapse
Affiliation(s)
- Wenjing Zou
- 1Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014 China
| | - Chao Niu
- China International Science and Technology Cooperation base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014 China
| | - Zhou Fu
- China International Science and Technology Cooperation base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014 China
| | - Caihui Gong
- China International Science and Technology Cooperation base of Child Development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400014 China
| |
Collapse
|
8
|
Zhao W, Jia L, Yang HJ, Xue X, Xu WX, Cai JQ, Guo RJ, Cao CC. Taurine enhances the protective effect of Dexmedetomidine on sepsis-induced acute lung injury via balancing the immunological system. Biomed Pharmacother 2018; 103:1362-1368. [PMID: 29864919 DOI: 10.1016/j.biopha.2018.04.150] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 04/19/2018] [Accepted: 04/19/2018] [Indexed: 02/07/2023] Open
Abstract
Sepsis, an overwhelming systemic inflammatory disease, is the leading cause of acute lung injury (ALI). Despite plenty of researches have been done, effective drugs treating septic ALI are still eagerly needed in the clinic. Dexmedetomidine (Dex), a potent alpha-2 adrenoreceptor agonist, has been reported to possess antioxidant, anti-apoptosis and anti-inflammatory abilities. Taurine, a kind of intracellular free amino acid, has been used to treat various diseases. This study aimed to explore the combination effect of Dex and Taurine on septic ALI and the underlying mechanism in vivo. The establishment of septic ALI was set up in SD rats by cecal ligation and puncture (CLP) operation. Results indicated that Dex or Taurine could reduce septic ALI-induced cell apoptosis via decreasing caspase-3 activity. However, the combination of Dex or Taurine produced greater effect. Besides that, Dex combined with Taurine could better promote cell proliferation with remarkably elevated Ki67 expression. The combination of Dex and Taurine significantly suppressed the activation of NF-κB pathway via inhibiting P65 phosphorylation and P65 nuclear translocation, leading to the down-regulation of interleukin (IL)-6 and IL-1β. Moreover, co-administration of Dex and Taurine alleviated the imbalance of Th1/Th2 induced by septic ALI to a great extent. All in all, our study suggested the synergistic therapeutic effect of Dex and Taurine on septic ALI.
Collapse
Affiliation(s)
- Wei Zhao
- Intensive Care Unit, Sir Run Run Hospital, Nanjing Medical Univercity, 211100, PR China
| | - Ling Jia
- Intensive Care Unit, Sir Run Run Hospital, Nanjing Medical Univercity, 211100, PR China
| | - Hui-Jing Yang
- Intensive Care Unit, Sir Run Run Hospital, Nanjing Medical Univercity, 211100, PR China
| | - Xiang Xue
- Intensive Care Unit, Sir Run Run Hospital, Nanjing Medical Univercity, 211100, PR China
| | - Wei-Xiao Xu
- Intensive Care Unit, Sir Run Run Hospital, Nanjing Medical Univercity, 211100, PR China
| | - Jian-Qin Cai
- Intensive Care Unit, Sir Run Run Hospital, Nanjing Medical Univercity, 211100, PR China
| | - Rui-Juan Guo
- Intensive Care Unit, Sir Run Run Hospital, Nanjing Medical Univercity, 211100, PR China
| | - Chang-Chun Cao
- Sir Run Run Hospital, Nanjing Medical Univercity, No. 109 Longmian Road, Jiangning Disctrict, Nanjing, Jiangsu, 211100, PR China.
| |
Collapse
|
9
|
Zha X, Sun B, Zhang R, Li C, Yan Z, Chen J. Regulatory effect of microRNA-34a on osteogenesis and angiogenesis in glucocorticoid-induced osteonecrosis of the femoral head. J Orthop Res 2018; 36:417-424. [PMID: 28543623 DOI: 10.1002/jor.23613] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 05/08/2017] [Indexed: 02/04/2023]
Abstract
Glucocorticoid-induced osteonecrosis of the femoral head (GIOFH) is a common and devastating orthopedic disease, and its underlying mechanism remains unclear. The aim of this study was to determine the role of microRNA-34a (mir-34a) in GIOFH. C57 mouse mesenchymal stem cells (mMSCs) and human umbilical vein endothelial cells (HUVECs) were cultured with dexamethasone (Dex). A total of 48 adult rats were treated with glucocorticoids, and after the onset of GIOFH, each femoral head was removed. Mir-34a mimics, an inhibitor and over-expressing lentivirus were used in vitro and in vivo, respectively. Real-time PCR, immunohistochemistry, ELISA, cell proliferation assays, osteoblastic differentiation, and endothelial activity assays were employed to evaluate the effect of mir-34a on mMSCs, osteoblasts, and vascular endothelial cells in glucocorticoid-treated mice. We found that Dex inhibited mMSC proliferation and osteoblastic differentiation, as well as the viability and activity of endothelial cells. Dex also caused osteonecrosis and decreased new vessel formation in vivo. Mir-34a alleviated the inhibitory effects of Dex on mMSCs and osteoblasts, while facilitating its inhibitory effects on endothelial cells. Mir-34a is an important regulator in osteogenesis and angiogenesis, and it might be useful as a therapeutic target for GIOFH. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:417-424, 2018.
Collapse
Affiliation(s)
- Xiaolong Zha
- Department of Orthopedics, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai, China
| | - Bolin Sun
- Department of Orthopedics, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai, China
| | - Rufan Zhang
- Department of Plastic and Reconstructive Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Chen Li
- Department of Orthopedics, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai, China
| | - Zuoqin Yan
- Department of Orthopedics, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai, China
| | - Jifei Chen
- Department of Orthopedics, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai, China
| |
Collapse
|
10
|
Li Z, Dong J, Zou T, Du C, Li S, Chen C, Liu R, Wang K. Dexamethasone induces docetaxel and cisplatin resistance partially through up-regulating Krüppel-like factor 5 in triple-negative breast cancer. Oncotarget 2017; 8:11555-11565. [PMID: 28030791 PMCID: PMC5355285 DOI: 10.18632/oncotarget.14135] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 11/22/2016] [Indexed: 11/25/2022] Open
Abstract
PURPOSE Dexamethasone (Dex), a glucocorticoid (GC), is used as a pretreatment drug in cancer patients undergoing chemotherapy. Dex functions by binding to the glucocorticoid receptor (GR) to prevent allergic reactions and severe chemotherapeutic side effects such as nausea and vomiting. However, the mechanisms by which Dex causes chemoresistance remain unknown. METHODS We used docetaxel and cisplatin to treat triple-negative breast cancer (TNBC) cells with or without Dex and assessed cell proliferation using a sulforhodamine B colorimetric (SRB) assay. Additionally, Western blotting was employed to measure Krüppel-like factor 5 (KLF5), GR and several apoptosis-related proteins. To determine how the GR regulates KLF5, we used qRT-PCR, luciferase reporter assays and ChIP assays. Finally, we detected the involvement of Dex in TNBC chemotherapeutic resistance using HCC1806 xenograft model in vivo. RESULTS In this study, we demonstrated that Dex induces docetaxel and cisplatin resistance in TNBC cells in vitro and in vivo. Dex up-regulates pro-survival transcription factor KLF5 expression at both mRNA and protein levels dependent on GR. Importantly, Dex failed to promote cancer cell survival and tumor growth when KLF5 induction was blocked. CONCLUSIONS We conclude that KLF5 is a Dex-induced gene that contributes to Dex-mediated drug chemoresistance, providing a potential novel target for TNBC treatment.
Collapse
Affiliation(s)
- Zhen Li
- Department of Gastrointestinal and Hernia Surgery, Institute of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, China
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
- Kunming Digestive Disease Treatment Engineering Technology Center, Kunming, Yunnan 650032, China
| | - Jian Dong
- Department of Oncology, Yunnan Tumor Hospital, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650118, China
| | - Tianning Zou
- Department of Breast Surgery, Yunnan Tumor Hospital, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650118, China
| | - Chengzhi Du
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
| | - Siyuan Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
| | - Ceshi Chen
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
| | - Rong Liu
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
| | - Kunhua Wang
- Department of Gastrointestinal and Hernia Surgery, Institute of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, China
- Kunming Digestive Disease Treatment Engineering Technology Center, Kunming, Yunnan 650032, China
| |
Collapse
|
11
|
Pan B, Liu J, Zhang Y, Sun Y, Wu Q, Zhao K, Zeng L, Xu K. Acute ablation of DP thymocytes induces up-regulation of IL-22 and Foxn1 in TECs. Clin Immunol 2014; 150:101-8. [PMID: 24333537 DOI: 10.1016/j.clim.2013.11.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 10/18/2013] [Accepted: 11/01/2013] [Indexed: 12/20/2022]
Abstract
Thymic epithelial cells (TECs) provide the basic architecture for the development of thymocytes. TEC is regenerative after impairment in thymus of young mice. However, how this regeneration program is governed remains unclear. Transcription factor Foxn1 is a central mediator of the differentiation and function of TEC. We examined the relation between thymic injury and Foxn1 in TEC. Total body irradiation (TBI) treatments induced up-regulation of Foxn1 in TEC, which was abolished when thymic function recovered. Specific depletion of double positive (DP) thymocytes triggered the up-regulation of Foxn1. On the other hand, extracellular IL-22 is a potential regulator of homeostasis of TEC. We demonstrated that TBI treatments also induced the up-regulation of intrathymic IL-22. Expression pattern of Foxn1 shares similar characteristics with IL-22. Furthermore, Foxn1 related genes that regulate the function of TEC were also up-regulated. Thus, our data reveal that TBI treatment triggers regeneration program of TEC.
Collapse
Affiliation(s)
- Bin Pan
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Jie Liu
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
| | - Ying Zhang
- Laboratory of Transplant Immunology, Xuzhou Medical College, Xuzhou, China
| | - Yuqi Sun
- Laboratory of Transplant Immunology, Xuzhou Medical College, Xuzhou, China
| | - Qingyun Wu
- Laboratory of Transplant Immunology, Xuzhou Medical College, Xuzhou, China
| | - Kai Zhao
- Laboratory of Transplant Immunology, Xuzhou Medical College, Xuzhou, China
| | - Lingyu Zeng
- Laboratory of Transplant Immunology, Xuzhou Medical College, Xuzhou, China
| | - Kailin Xu
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China; Laboratory of Transplant Immunology, Xuzhou Medical College, Xuzhou, China.
| |
Collapse
|
12
|
Whittington RA, Bretteville A, Dickler MF, Planel E. Anesthesia and tau pathology. Prog Neuropsychopharmacol Biol Psychiatry 2013; 47:147-55. [PMID: 23535147 PMCID: PMC3741335 DOI: 10.1016/j.pnpbp.2013.03.004] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Revised: 03/15/2013] [Accepted: 03/15/2013] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is the most common form of dementia and remains a growing worldwide health problem. As life expectancy continues to increase, the number of AD patients presenting for surgery and anesthesia will steadily rise. The etiology of sporadic AD is thought to be multifactorial, with environmental, biological and genetic factors interacting together to influence AD pathogenesis. Recent reports suggest that general anesthetics may be such a factor and may contribute to the development and exacerbation of this neurodegenerative disorder. Intra-neuronal neurofibrillary tangles (NFT), composed of hyperphosphorylated and aggregated tau protein are one of the main neuropathological hallmarks of AD. Tau pathology is important in AD as it correlates very well with cognitive dysfunction. Lately, several studies have begun to elucidate the mechanisms by which anesthetic exposure might affect the phosphorylation, aggregation and function of this microtubule-associated protein. Here, we specifically review the literature detailing the impact of anesthetic administration on aberrant tau hyperphosphorylation as well as the subsequent development of neurofibrillary pathology and degeneration.
Collapse
Affiliation(s)
- Robert A. Whittington
- Department of Anesthesiology, Columbia University, New York, NY 10032,Corresponding Author: Robert A. Whittington, MD, Columbia University, College of Physicians and Surgeons, Department of Anesthesiology, 622 West 168th Street PH 5, New York, NY 10032, Tel: 212-305-1567, Fax: 212-305-0777,
| | - Alexis Bretteville
- Centre de Recherche du CHU de Québec, Axe Neurosciences, Québec (QC), Canada, G1V 4G2
| | - Maya F. Dickler
- Centre de Recherche du CHU de Québec, Axe Neurosciences, Québec (QC), Canada, G1V 4G2
| | - Emmanuel Planel
- Centre de Recherche du CHU de Québec, Axe Neurosciences, Québec (QC), Canada, G1V 4G2,Université Laval, Département de Psychiatrie et Neurosciences, Québec (QC), Canada, G1V 0A6
| |
Collapse
|
13
|
Khan MP, Mishra JS, Sharan K, Yadav M, Singh AK, Srivastava A, Kumar S, Bhaduaria S, Maurya R, Sanyal S, Chattopadhyay N. A novel flavonoid C-glucoside from Ulmus wallichiana preserves bone mineral density, microarchitecture and biomechanical properties in the presence of glucocorticoid by promoting osteoblast survival: a comparative study with human parathyroid hormone. Phytomedicine 2013; 20:1256-66. [PMID: 23928508 DOI: 10.1016/j.phymed.2013.07.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 05/31/2013] [Accepted: 07/09/2013] [Indexed: 05/23/2023]
Abstract
PURPOSE 6-C-β-D-glucopyranosyl-(2S,3S)-(+)-5,7,3',4'-tetrahydroxydihydroflavonol (GTDF) is a novel compound isolated from Ulmus wallichiana, reported to have bone anabolic action in ovariectomized rats. Here, we studied the effect of GTDF in glucocorticoid (GC)-induced bone loss and its mode of action. METHODS Osteoblasts were cultured from rat calvaria or bone marrow to study apoptosis and differentiation by dexamethasone (Dex), methylprednisolone (MP), GTDF, quercetin and rutin. Female Sprague Dawley rats were treated with Dex or MP with or without GTDF or PTH. Efficacy was evaluated by bone microarchitecture using microcomputed tomography, determination of new bone formation by fluorescent labeling of bone and osteoblast apoptosis by co-labeling bone sections with Runx-2 and TUNEL. Serum osteocalcin was determined by ELISA. RESULTS GTDF preserved trabecular and cortical bones in the presence of Dex and MP and mitigated the MP-mediated suppression of serum osteocalcin. Co-administration of GTDF to MP rats increased mineral apposition, bone formation rates, bone biomechanical strength, reduced osteoblast apoptosis and increased osteogenic differentiation of bone marrow stromal cells compared to MP group, suggesting in vivo osteogenic effect of GTDF. These effects of GTDF were to a great extent comparable to PTH. GTDF prevented GC-induced osteoblast apoptosis by inhibiting p53 expression and acetylation, and activation of AKT but did not influence transactivation of GC receptor (GR). CONCLUSIONS GTDF protects against GC-induced bone loss by promoting osteoblast survival through p53 inhibition and activation of AKT pathways but not as a GR antagonist. GTDF has the potential in the management of GC-induced osteopenia.
Collapse
Affiliation(s)
- M P Khan
- Division of Endocrinology, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226021, India; Center for Research on Anabolic Skeletal Targets in Health and Illness (ASTHI), CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226021, India; Center for Drug Discovery and Development in Reproductive Health (CDDDRH), CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226021, India
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Iyer AK, Singh A, Ganta S, Amiji MM. Role of integrated cancer nanomedicine in overcoming drug resistance. Adv Drug Deliv Rev 2013; 65:1784-802. [PMID: 23880506 DOI: 10.1016/j.addr.2013.07.012] [Citation(s) in RCA: 227] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/19/2013] [Accepted: 07/15/2013] [Indexed: 12/18/2022]
Abstract
Cancer remains a major killer of mankind. Failure of conventional chemotherapy has resulted in recurrence and development of virulent multi drug resistant (MDR) phenotypes adding to the complexity and diversity of this deadly disease. Apart from displaying classical physiological abnormalities and aberrant blood flow behavior, MDR cancers exhibit several distinctive features such as higher apoptotic threshold, aerobic glycolysis, regions of hypoxia, and elevated activity of drug-efflux transporters. MDR transporters play a pivotal role in protecting the cancer stem cells (CSCs) from chemotherapy. It is speculated that CSCs are instrumental in reviving tumors after the chemo and radiotherapy. In this regard, multifunctional nanoparticles that can integrate various key components such as drugs, genes, imaging agents and targeting ligands using unique delivery platforms would be more efficient in treating MDR cancers. This review presents some of the important principles involved in development of MDR and novel methods of treating cancers using multifunctional-targeted nanoparticles. Illustrative examples of nanoparticles engineered for drug/gene combination delivery and stimuli responsive nanoparticle systems for cancer therapy are also discussed.
Collapse
|
15
|
Pandolfi J, Baz P, Fernández P, Discianni Lupi A, Payaslián F, Billordo LA, Fainboim L, Arruvito L. Regulatory and effector T-cells are differentially modulated by Dexamethasone. Clin Immunol 2013; 149:400-10. [PMID: 24211714 DOI: 10.1016/j.clim.2013.09.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 09/13/2013] [Accepted: 09/30/2013] [Indexed: 12/28/2022]
Abstract
It is assumed that the ratio between effector T cells (Teff) and regulatory T cells (Tregs) controls the immune reactivity within the T-cell compartment. The purpose of this study was to investigate if Dexamethasone (Dex) affects Teff and Tregs subsets. Dex induced on Tregs a dose and time-dependent apoptosis which resulted in a relative increase of Teff. After TCR activation, Dex induced a strong proliferative inhibition of Teff, but a weaker proliferative inhibition on Tregs. These effects were modulated by IL-2, which not only restored the proliferative response, but also prevented Dex-induced apoptosis. The highest dose of IL-2 prevented apoptosis on all FOXP3+CD4+ T cells. Meanwhile, the lowest dose only rescued activated Tregs (aTregs), probably related to their CD25 higher expression. Because Dex did not affect the suppressor capacity of aTregs either, our results support the notion that under Dex treatment, the regulatory T-cell compartment maintains its homeostasis.
Collapse
|
16
|
Zhou R, Yao X, Xu X, Wang G, Zhu Z, Chen J, Chen L, Shen X. Blockage of progesterone receptor effectively protects pancreatic islet beta cell viability. Steroids 2013; 78:987-95. [PMID: 23827354 DOI: 10.1016/j.steroids.2013.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/21/2013] [Accepted: 06/11/2013] [Indexed: 01/09/2023]
Abstract
The progesterone receptor (PR), a member of nuclear receptor superfamily, is closely associated with gestational, type 1 and type 2 diabetes. However, the underlying mechanisms remain obscure. Here we found that PR activation increased the pro-inflammatory cytokines (PIC)-induced injury in Min6 cells, and PR blockage with siRNA interference protected the cells from damage. Moreover, the new discovered PR antagonist SC51089 effectively improved cell survival by reducing the PIC-stimulated cell apoptosis in Min6 cells. Immunoblotting assays indicated that either PR agonist progesterone (P4) or PR-B over-expression promoted the PIC-induced reinforces of extracellular-signal-regulated kinase 1/2 phosphorylation (p-Erk) and protein 53 (p53), and the attenuations of protein kinase B phosphorylation (p-AKT) and tumor necrosis factor receptor-associated factor 2 (TRAF2). SC51089 could reverse all the P4- or PR-B over-expression induced effects. In addition, PR siRNA inference based assay further supported that SC51089 protected pancreatic islet beta cells from the PR activation or PIC-induced injury by targeting PR and this protective action was mediated by AKT signaling pathway. To our knowledge, this current work might be the first report on the regulation of PR in pancreatic islet beta cell survival. It is expected that SC51089, as a non-steroid PR antagonist, might also find its potential in anti-diabetic research.
Collapse
Affiliation(s)
- Rong Zhou
- School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Sato S, Shirakawa H, Tomita S, Tohkin M, Gonzalez FJ, Komai M. The aryl hydrocarbon receptor and glucocorticoid receptor interact to activate human metallothionein 2A. Toxicol Appl Pharmacol 2013; 273:90-9. [PMID: 23994556 DOI: 10.1016/j.taap.2013.08.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 08/07/2013] [Accepted: 08/12/2013] [Indexed: 01/22/2023]
Abstract
Although the aryl hydrocarbon receptor (AHR) and glucocorticoid receptor (GR) play essential roles in mammalian development, stress responses, and other physiological events, crosstalk between these receptors has been the subject of much debate. Metallothioneins are classic glucocorticoid-inducible genes that were reported to increase upon treatment with AHR agonists in rodent tissues and cultured human cells. In this study, the mechanism of human metallothionein 2A (MT2A) gene transcription activation by AHR was investigated. Cotreatment with 3-methylcholanthrene and dexamethasone, agonists of AHR and GR respectively, synergistically increased MT2A mRNA levels in HepG2 cells. MT2A induction was suppressed by RNA interference against AHR or GR. Coimmunoprecipitation experiments revealed a physical interaction between AHR and GR proteins. Moreover, chromatin immunoprecipitation assays indicated that AHR was recruited to the glucocorticoid response element in the MT2A promoter. Thus, we provide a novel mechanism whereby AHR modulates expression of human MT2A via the glucocorticoid response element and protein-protein interactions with GR.
Collapse
|