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Wang H, Wang W, Wang J, Zhang L, Luo Y, Tang X. MicroRNA-15a/β1,4-GalT-I axis contributes to cartilage degeneration via NF-κB signaling in osteoarthritis. Clinics (Sao Paulo) 2023; 78:100254. [PMID: 37478628 PMCID: PMC10387577 DOI: 10.1016/j.clinsp.2023.100254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 06/05/2023] [Accepted: 07/03/2023] [Indexed: 07/23/2023] Open
Abstract
OBJECTIVE Osteoarthritis is a condition characterized by articular cartilage degradation. The increased expression of β1,4-Galactosyltransferase-I (β1,4-GalT-I) in the articular cartilage of osteoarthritis patients was related to an inflammatory response. The aim of this study was to elucidate the role of β1,4-GalT-I in osteoarthritis. This study aimed to determine the function of 1,4-GalT-I in osteoarthritis. METHODS The osteoarthritis mouse model with the destabilization of the medial meniscus was established by microsurgical technique. Pathological changes in articular cartilage were observed by hematoxylin and eosin staining and safranin O-fast green staining. Quantitative real-time polymerase chain reaction, western blot, and enzyme-linked immunosorbent assays were used to observe mRNA and protein expression, respectively. RNA interactions were verified by a luciferase reporter assay. SA-β-Gal staining was used to assess chondrocyte senescence. Immunofluorescence staining was conducted to observe the localization of Nuclear Factor-kappaB (NF-κB). RESULTS β1,4-GalT-I and microRNA-15a (miR-15a) show high and low expression in the articular cartilage of osteoarthritis, respectively. MiR-15a inhibits the mRNA translation of β1,4-GalT-I. β1,4-GalT-I promotes extracellular matrix degradation, senescence, and NF-κB activation in IL-1β-stimulated chondrocytes, which can be reversed by overexpression of miR-15a. Intra-articular injection of microRNA-15a ameliorates cartilage degeneration by inhibiting β1,4-GalT-I and phosphorylation of NF-κB in vivo. CONCLUSION The authors clarified that the miR-15a/β1,4-GalT-I axis inhibits the phosphorylation of NF-κB thereby inhibiting extracellular matrix degradation and senescence in chondrocytes to alleviate cartilage degeneration in osteoarthritis. MiR-15a and β1,4-GalT-I may serve as potentially effective targets for the future treatment of osteoarthritis.
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Affiliation(s)
- Hairong Wang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Weilin Wang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Jian Wang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Linsheng Zhang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Yujie Luo
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Xiaobo Tang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China.
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Nien MS, Cheng WP, Feng J, Cui YY. The molecular mechanism of GADD153 in apoptosis of keloid fibroblasts exposed to botulinum toxin type A. J Cell Mol Med 2021; 25:9402-9410. [PMID: 34472704 PMCID: PMC8500951 DOI: 10.1111/jcmm.16881] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 08/04/2021] [Accepted: 08/11/2021] [Indexed: 12/16/2022] Open
Abstract
Apoptosis plays a key role in keloids. Growth arrest and DNA damage‐inducible gene 153 (GADD153) is regulated by apoptosis. Botulinum toxin type A (BTXA) can induce apoptosis in keloid fibroblasts. This research aimed to explore the hypothesis that GADD153 mediates apoptosis in keloid fibroblasts exposed to BTXA. BTXA significantly induced GADD153 protein and mRNA expression in keloid fibroblasts. Treatment with c‐Jun N‐terminal kinase (JNK) inhibitor SP600125, JNK small interfering RNA (siRNA) and tumour necrosis factor‐alpha (TNF‐α) antibodies reversed the BTXA‐induced GADD153 expression. BTXA enhanced the transcriptional activity of GADD153, whereas the GADD153 mutant plasmid, JNK siRNA and anti‐TNF‐α antibody treatment abolished the BTXA‐induced transcriptional activity of GADD153. The addition of TNF‐α to keloid fibroblasts markedly increased GADD153 protein expression. The addition of GADD153 siRNA, SP600125 and anti‐TNF‐α antibodies reversed cell death and caspase 3 and 9 activity induced by BTXA.
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Affiliation(s)
- Ming-Shiuan Nien
- Department of plastic surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Wen-Pin Cheng
- Translational Medicine Center, Shin Kong Wu Ho Su Memorial Hospital, Taipei, Taiwan
| | - Jun Feng
- Department of plastic surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Yong-Yan Cui
- Department of plastic surgery, Peking University Shenzhen Hospital, Shenzhen, China
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Pardo-Mora DP, Murillo OJ, Rey-Buitrago M, Losada-Barragán M, Uribe JFC, Santiago KB, Conti BJ, Cardoso EDO, Conte FL, Gutiérrez RM, García OT, Sforcin JM. Apoptosis-related gene expression induced by Colombian propolis samples in canine osteosarcoma cell line. Vet World 2021; 14:964-971. [PMID: 34083947 PMCID: PMC8167511 DOI: 10.14202/vetworld.2021.964-971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 03/01/2021] [Indexed: 01/01/2023] Open
Abstract
Background and Aim Osteosarcoma (OSA) is the most common bone tumor in canines and humans. This study aimed to assess the cytotoxic and apoptotic effects of Colombian propolis samples on a canine OSA cell line (OSCA-8) by evaluating the expression of BCL-2, BAX, CASPASE 9, CASPASE 8, and TNFR1 genes involved in the apoptosis pathway. Materials and Methods After treating the cells with five Colombian propolis samples (Usm, Met, Fus, Sil, and Caj), we evaluated cell viability and lactate dehydrogenase (LDH) release. Early and late apoptosis was determined by flow cytometry using annexin V/propidium iodide. Furthermore, the effects of three selected samples on gene expression were analyzed by real-time polymerase chain reaction. Results The Colombian propolis samples reduced OSCA-8 cell viability and increased LDH release. All samples induced apoptosis significantly and upregulated BCL-2 and CASPASE 8 expression. Usm and Sil increased BAX expression, Met and Sil induced CASPASE 9 expression, and Usm increased TNFR1. Conclusion Colombian propolis samples exhibited cytotoxic and apoptotic effects on canine OSA cells, and CASPASE 8 upregulation indicated apoptosis induction by the extrinsic pathway.
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Affiliation(s)
- Dolly Patricia Pardo-Mora
- Department of Animal Health, Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Bogotá, Colombia
| | - Oscar Julián Murillo
- Department of Morphology, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Mauricio Rey-Buitrago
- Department of Animal Health, Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Bogotá, Colombia.,Department of Morphology, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Mónica Losada-Barragán
- Department of Animal Health, Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Bogotá, Colombia
| | - Jaime Fabian Cruz Uribe
- Department of Animal Health, Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Bogotá, Colombia
| | - Karina Basso Santiago
- Department of Chemical and Biological Sciences, São Paulo State University (UNESP), Institute of Biosciences, Campus Botucatu, Brazil
| | - Bruno José Conti
- Department of Chemical and Biological Sciences, São Paulo State University (UNESP), Institute of Biosciences, Campus Botucatu, Brazil
| | - Eliza de Oliveira Cardoso
- Department of Chemical and Biological Sciences, São Paulo State University (UNESP), Institute of Biosciences, Campus Botucatu, Brazil
| | - Fernanda Lopes Conte
- Department of Chemical and Biological Sciences, São Paulo State University (UNESP), Institute of Biosciences, Campus Botucatu, Brazil
| | - Rafael María Gutiérrez
- Department of Animal Health, Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Bogotá, Colombia
| | - Orlando Torres García
- Department of Animal Health, Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Bogotá, Colombia
| | - José Maurício Sforcin
- Department of Chemical and Biological Sciences, São Paulo State University (UNESP), Institute of Biosciences, Campus Botucatu, Brazil
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Bazhanova ED, Anisimov VN. Participation of FAS- and TNF-Dependent Pathways in Apoptosis Mechanisms in Hypothalamus in Physiological and Pathological Aging. ADVANCES IN GERONTOLOGY 2020. [DOI: 10.1134/s2079057020040037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Allison LN, Jaffey JA, Bradley-Siemens N, Tao Z, Thompson M, Backus RC. Immune function and serum vitamin D in shelter dogs: A case-control study. Vet J 2020; 261:105477. [PMID: 32741494 DOI: 10.1016/j.tvjl.2020.105477] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/28/2020] [Accepted: 05/28/2020] [Indexed: 11/28/2022]
Abstract
This study sought to establish a baseline understanding of immune function and its association with serum vitamin D in shelter dogs. Ten apparently healthy shelter dogs housed in the Arizona Humane Society for ≥7 days and 10 apparently healthy, age, breed, and sex-matched control dogs were included. Serum 25-hydroxyvitamin D (25[OH]D), the major circulating vitamin D metabolite, was measured using high performance liquid chromatography. Whole blood samples were stimulated with lipopolysaccharide (LPS), lipoteichoic acid, or phosphate buffer solution, and tumor necrosis factor (TNF)-ɑ, interleukin (IL)-6, and IL-10 were measured using a canine-specific multiplex bead-based assay. Phagocytosis of opsonized-Escherichia coli and E. coli-induced oxidative burst were evaluated with flow cytometry. Shelter dogs had decreased percentages of granulocytes and monocytes (GM) that had phagocytized opsonized-E coli (P = 0.019) and performed E. coli-induced oxidative burst (P = 0.011). There were no significant differences in TNF-α, IL-6, IL-10, or 25(OH)D concentrations between shelter and control dogs. Serum 25(OH)D concentrations had a weak positive association with the intensity of GM E. coli-induced oxidative burst (r2 = 0.23, P = 0.03). There was a moderate inverse association between serum 25(OH)D concentration and LPS-stimulated TNF-ɑ production in shelter dogs (r2 = 0.40, P = 0.04). These results demonstrate immune dysregulation in vitro in shelter dogs housed for ≥7 days when compared to age, breed, and sex-matched control dogs. While serum 25(OH)D concentrations did not differ between shelter and control dogs, significant associations between 25(OH)D concentration and immune function parameters in vitro were identified.
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Affiliation(s)
- L N Allison
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308, USA
| | - J A Jaffey
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308, USA.
| | - N Bradley-Siemens
- Department of Pathology and Population Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308, USA
| | - Z Tao
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308, USA
| | - M Thompson
- Arizona Humane Society, 9226 N 13th Ave, Phoenix, AZ 85021, USA
| | - R C Backus
- Department of Veterinary Medicine and Surgery, Veterinary Health Center, University of Missouri, 900 E Campus Dr, Columbia, MO 65211, USA
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Insights into mechanisms of pranoprofen-induced apoptosis and necroptosis in human corneal stromal cells. Toxicol Lett 2019; 320:9-18. [PMID: 31765691 DOI: 10.1016/j.toxlet.2019.11.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 11/15/2019] [Accepted: 11/18/2019] [Indexed: 12/13/2022]
Abstract
Pranoprofen (PPF) is a wildly used anti-inflammatory ophthalmic drug. It was reported that PPF could decrease early epithelialization of scrape wounds in rabbit cornea and could reduce cell activities of cultured human corneal endothelial cells. However, effects of PPF on corneal stromal cells playing important roles in corneal wound healing remain unknown. In this study,in vitro model of cultured human corneal stomal (HCS) cells and in vivo model of rabbit corneas were used to investigate the effects and underlying mechanisms of PPF. Our findings showed that high concentrations of PPF treatment (0.1 % to 0.0125 %) caused limited chromatin condensation and quickly decreased cell viability that was proved to initiate necroptosis in HCS cells through activating receptor interacting protein kinase (RIPK) and mixed lineage kinase domain-like (MLKL). While low concentrations of PPF treatment (0.00625 %) induced DNA fragmentation, apoptotic body formation, ROS generation, activation of caspases and increase in cytoplasmic content of Bad, Bax and cytoplasmic cytochrome c that suggested apoptosis happened through ROS-mediated caspase-dependent and caspase-independent pathways. Studies of rabbit corneas treated with 0.1 % PPF (the clinical concentration) showed that PPF could induce apoptosis of rabbit corneal stromal cells. This work would be helpful for better understanding cytotoxic effects PPF on human corneal cells.
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Li Q, Ding Y, Gao Y, Zhang F, Zhu H, Ding M. Effects of TNFR1 gene silencing on early apoptosis of marbofloxacin-treated chondrocytes from juvenile dogs. Toxicology 2019; 422:53-59. [PMID: 31005593 DOI: 10.1016/j.tox.2019.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 03/27/2019] [Accepted: 04/16/2019] [Indexed: 11/26/2022]
Abstract
Quinolones (QNs)-induced cartilaginous lesions in juvenile animals by chondrocyte apoptosis is an important toxic effect, which results in the restriction of their use in pediatrics. However, limited data about QNs chondrotoxicity are available for evaluation of the potential toxicity in both animals and human cartilage. To explore whether tumor necrosis factor/its receptor (TNF/TNFR1) signaling pathway is involved in the early apoptosis of marbofloxacin-induced chondrocytes, canine juvenile chondrocytes were treated with 0, 20, 50 and 100 μg/mL marbofloxacin. Results showed that the apoptosis rates of the chondrocytes at 2, 8 and 24 h were significantly increased in a concentration- and time-dependent manner (P < 0.05). The mRNA levels of apoptosis-related factors in TNF/TNFR1 signaling pathways and the protein levels of TNFα and TNFR1 were increased in canine chondrocytes treated with 20-100 μg/mL marbofloxacin (P < 0.05) while TNFR1 gene silencing significantly decreased the chondrocyte apoptosis and inhibited the mRNA expression of TNF/TNFR1 downstream signaling molecules after 100 μg/mL marbofloxacin treatment at 8 h (P < 0.01). It was confirmed that activated TNF/TNFR1 signaling pathway may play a leading role in the early apoptosis of marbofloxacin-induced canine juvenile chondrocytes, which is helpful for clinical estimation or prevention of the risk of QNs.
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Affiliation(s)
- Qiao Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yi Ding
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuan Gao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Futao Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Hongmei Zhu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Mingxing Ding
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China.
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Chen L, Liu L, Xie Z, Wang F, Zhu L, Zhang C, Fan P, Sinkemani A, Hong X, Wu X. Protein kinase RNA‐like ER kinase/eukaryotic translation initiation factor 2α pathway attenuates
tumor necrosis factor alpha‐induced apoptosis in nucleus pulposus cells by activating autophagy. J Cell Physiol 2018; 234:11631-11645. [PMID: 30515797 DOI: 10.1002/jcp.27820] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 11/06/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Lu Chen
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
- Surgery Research Center, Institute of Clinical Sciences, School of Medicine, Southeast University Nanjing China
| | - Lei Liu
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
| | - Zhi‐Yang Xie
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
| | - Feng Wang
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
| | - Lei Zhu
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
| | - Cong Zhang
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
- Surgery Research Center, Institute of Clinical Sciences, School of Medicine, Southeast University Nanjing China
| | - Pan Fan
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
- Surgery Research Center, Institute of Clinical Sciences, School of Medicine, Southeast University Nanjing China
| | - Arjun Sinkemani
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
- Surgery Research Center, Institute of Clinical Sciences, School of Medicine, Southeast University Nanjing China
| | - Xin Hong
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
| | - Xiao‐Tao Wu
- Department of Spine Surgery Zhongda Hospital, School of Medicine, Southeast University Nanjing China
- Surgery Research Center, Institute of Clinical Sciences, School of Medicine, Southeast University Nanjing China
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Chen L, Xie ZY, Liu L, Zhu L, Wang F, Fan P, Sinkemani A, Zhang C, Hong X, Wu XT. Nuclear factor-kappa B-dependent X-box binding protein 1 signalling promotes the proliferation of nucleus pulposus cells under tumour necrosis factor alpha stimulation. Cell Prolif 2018; 52:e12542. [PMID: 30430692 PMCID: PMC6496019 DOI: 10.1111/cpr.12542] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/27/2018] [Accepted: 09/19/2018] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVES Tumour necrosis factor alpha (TNF-α) expressed by nucleus pulposus cells (NPCs) plays a critical role in intervertebral disc (IVD) degeneration. A key unfolded protein response (UPR) component, X-box binding protein 1 (XBP1) and nuclear factor-kappa B (NF-κB) are essential for cell survival and proliferation. The aim of our study was to elucidate the roles of XBP1 and NF-κB in IVD degeneration (IDD). MATERIALS AND METHODS Rat NPCs were cultured with TNF-α in the presence or absence of XBP1 and NF-κB-p65 small interfering RNA. The associated genes and proteins were evaluated through quantitative real-time PCR, Western blot analyses and immunofluorescence staining to monitor UPR and NF-κB signalling and identify the regulatory mechanism of p65 by XBP1. Cell counting kit-8 assay, cell cycle analysis and related gene and protein expression were performed to examine the proliferation of NPCs. RESULTS The acute exposure of TNF-α accelerated the proliferation of rat NPCs by activating the UPR/XBP1 pathway. XBP1 signalling favoured the phosphorylation and nuclear translocation of p65 subunit of NF-κB. The activation of NF-κB in the later phase also enhanced NPC proliferation. CONCLUSIONS Unfolded protein response reinforces the survival and proliferation of NPCs under TNF-α stimulation by activating the XBP1 pathway, and NF-κB serves as a vital mediator in these events. The XBP1 signalling of UPR can be a novel therapeutic target in IDD.
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Affiliation(s)
- Lu Chen
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Zhi-Yang Xie
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Lei Liu
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Lei Zhu
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Feng Wang
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Pan Fan
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Arjun Sinkemani
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Cong Zhang
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Xin Hong
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Xiao-Tao Wu
- Department of Spine Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
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SOCS-1 ameliorates smoke inhalation-induced acute lung injury through inhibition of ASK-1 activity and DISC formation. Clin Immunol 2017; 191:94-99. [PMID: 29108854 DOI: 10.1016/j.clim.2017.10.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 10/23/2017] [Accepted: 10/28/2017] [Indexed: 01/20/2023]
Abstract
Smoke inhalation leads to acute lung injury (ALI), a devastating clinical problem associated with high mortality. Suppressor of cytokine signaling-1 (SOCS-1) is a negative regulator of apoptosis and pro-inflammatory cytokine signaling, two major contributors to the pathogenesis of ALI. We have found that SOCS-1 protects lung epithelial cells from smoke-induced apoptosis through two mechanisms. One is that SOCS-1 enhances degradation of ASK-1 and diminishes cleavage of pro-caspase-3 to repress smoke-triggered apoptosis in lung epithelial cells. The other is that SOCS-1 represses smoke-triggered DISC formation through altering TRADD-caspase-8 interaction rather than TNFR-1-TRADD interaction or TNFR-1-TRAF-2 interaction. In conclusion, SOCS-1 relieves smoke inhalation-induced lung injury by repressing ASK-1 and DISC-mediated epithelium apoptosis.
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Abstract
Inhibitor of apoptosis proteins (IAPs) are critical regulators of cell death and survival pathways. Mice lacking cIAP1 and either cIAP2 or XIAP die in utero, and myeloid lineage-specific deletion of all IAPs causes sterile inflammation, but their role in the skin is unknown. We generated epidermal-specific IAP-deficient mice and found that combined genetic deletion of cIAP1 (epidermal knockout [EKO]) in keratinocytes and ubiquitous cIAP2 deletion (cIap1EKO/EKO.cIap2-/-) caused profound skin inflammation and keratinocyte death, lethal by postpartum day 10. To investigate their role in skin homeostasis, we injected an IAP antagonist compound subcutaneously into wild-type and knockout mice. This induced a toxic epidermal necrolysis-like local inflammation, which mirrored the phenotype seen in cIap1EKO/EKO.cIap2-/- mice. Loss of one Ripk1 allele limited lesion formation and significantly extended the lifespan of cIap1EKO/EKO.cIap2-/- mice. cIAP activities are important for recruitment of LUBAC to signaling complexes, and loss of LUBAC component SHARPIN, induces dermatitis in mice. Consistent with this relationship between cIAPs and LUBAC, Ripk1 heterozygosity also protected against development of dermatitis in Sharpin-deficient mice. This work therefore refines our molecular understanding of inflammatory signaling in the skin and defines potential targets for treating skin inflammation.
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Yuan XL, Wen Q, Zhang MY, Fan TJ. Cytotoxicity of pilocarpine to human corneal stromal cells and its underlying cytotoxic mechanisms. Int J Ophthalmol 2016; 9:505-11. [PMID: 27162720 DOI: 10.18240/ijo.2016.04.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 09/29/2015] [Indexed: 11/23/2022] Open
Abstract
AIM To examine the cytotoxic effect of pilocarpine, an anti-glaucoma drug, on human corneal stromal (HCS) cells and its underlying cytotoxic mechanisms using an in vitro model of non-transfected HCS cells. METHODS After HCS cells were treated with pilocarpine at a concentration from 0.15625 g/L to 20.0 g/L, their morphology and viability were detected by light microscopy and MTT assay. The membrane permeability, DNA fragmentation and ultrastructure were examined by acridine orange (AO)/ethidium bromide (EB) double-staining. DNA electrophoresis and transmission electron microscopy (TEM), cell cycle, phosphatidylserine (PS) orientation and mitochondrial transmembrane potential (MTP) were assayed by flow cytometry (FCM). And the activation of caspases was checked by ELISA. RESULTS Morphology observations and viability assay showed that pilocarpine at concentrations above 0.625 g/L induced dose- and time-dependent morphological abnormality and viability decline of HCS cells. AO/EB double-staining, DNA electrophoresis and TEM noted that pilocarpine at concentrations above 0.625 g/L induced dose- and/or time-dependent membrane permeability elevation, DNA fragmentation, and apoptotic body formation of the cells. Moreover, FCM and ELISA assays revealed that 2.5 g/L pilocarpine also induced S phase arrest, PS externalization, MTP disruption, and caspase-8, -9 and -3 activation of the cells. CONCLUSION Pilocarpine at concentrations above 0.625 g/L (1/32 of its clinical therapeutic dosage) has a dose- and time-dependent cytotoxicity to HCS cells by inducing apoptosis in these cells, which is most probably regulated by a death receptor-mediated mitochondrion-dependent signaling pathway.
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Affiliation(s)
- Xiao-Long Yuan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Qian Wen
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Meng-Yu Zhang
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Ting-Jun Fan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
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Cytotoxicity of atropine to human corneal epithelial cells by inducing cell cycle arrest and mitochondrion-dependent apoptosis. ACTA ACUST UNITED AC 2015; 67:517-24. [DOI: 10.1016/j.etp.2015.07.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 07/31/2015] [Indexed: 01/21/2023]
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14
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Wang C, Wu Q, Zeng Y, Huang D, Yu C, Wang X, Mei W. Synthesis, characterization and DNA-binding properties of Ru(II) complexes coordinated by ofloxacin as potential antitumor agents. J COORD CHEM 2015; 68:1489-1499. [DOI: 10.1080/00958972.2015.1020797] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 01/29/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Chengxi Wang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Qiong Wu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yongchang Zeng
- Shenzhen Institute of Gerontology, Second Clinical Medical College of Jinan University, Shenzhen, China
| | - Dongwei Huang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Chuqin Yu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xicheng Wang
- The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China
| | - Wenjie Mei
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
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