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Wang Q, Zhang Z, Gao X. Effects of ophthalmic surface anesthetic alcaine on the proliferation and apoptosis of human corneal endothelial cells through HIF-1α regulation. Cell Tissue Bank 2023; 24:561-570. [PMID: 36572744 DOI: 10.1007/s10561-022-10057-x] [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: 05/26/2022] [Accepted: 11/22/2022] [Indexed: 12/27/2022]
Abstract
The corneal endothelium is a monolayer, which mediates solute and water flux across the posterior corneal surface. Alcaine's main component proparacaine is paramount in human corneal endothelium (HCE) cell regulation. This study explored the mechanism of alcaine in regulating HCE cells. HCE cell morphology under gradient concentrations was observed by an optical microscope. Cell proliferation and viability were detected by MTT assay to determine the half inhibitory concentration (IC 50). Cell apoptosis rate, HIF-1α mRNA expression, and HIF-1α, p/t-JNK and Caspase-3 protein levels were detected by flow cytometry, RT-qPCR, and Western blot. After treatment with alcaine at 0.625-5 g/L concentration range for 24 h, HCE cells showed cytoplasmic vacuolation, cell shrinkage, separation from culture matrix, and eventual death. Alcaine treated-HCE cell proliferation was decreased in a dose-dependent manner. The IC 50 of alcaine was 1.26 g/L. After alcaine treatment, HCE cell apoptosis rate was promoted and HIF-1α levels in HCE cells were stimulated. Knockdown of HIF-1α partially annulled the effects of alcaine on inhibiting HCE cell proliferation and facilitating apoptosis. Alcaine might activate the JNK/caspase-3 pathway by increasing HIF-1α. The inhibition of the JNK/caspase-3 pathway partially abrogated the effects of alcaine on inhibiting HCE cell proliferation and promoting apoptosis. Alcaine might affect HCE cell proliferation and apoptosis by upregulating HIF-1α and activating the JNK/caspase-3 pathway.
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Affiliation(s)
- Quan Wang
- Department of Anesthesiology, Tianjin Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, No. 4 Gansu Road, Heping District, Tianjin, 300022, China
| | - Zhao Zhang
- Department of Anesthesiology, Tianjin Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, No. 4 Gansu Road, Heping District, Tianjin, 300022, China
| | - Xuesong Gao
- Department of Anesthesiology, Tianjin Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, No. 4 Gansu Road, Heping District, Tianjin, 300022, China.
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Szulc J, Nizioł J, Ruman T, Kuźniar A, Nowak A, Okrasa M, Nowak I, Szponar B, Kuberski S. Biological and chemical contamination of illegal, uncontrolled refuse storage areas in Poland. ENVIRONMENTAL RESEARCH 2023; 228:115825. [PMID: 37011789 DOI: 10.1016/j.envres.2023.115825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/12/2023] [Accepted: 03/31/2023] [Indexed: 05/16/2023]
Abstract
This study focused on assessing the microbiological and chemical contamination of air, soil and leachate in uncontrolled refuse storage areas in central Poland. The research included an analysis of the number of microorganisms (culture method), endotoxin concentration (gas chromatography-mass spectrometry), heavy metals level (atomic absorption spectrometry), elemental characteristics (elemental analyser), cytotoxicity assessment against A-549 (human lung) and Caco-2 (human colon adenocarcinoma) cell lines (PrestoBlue™ test) and toxic compound identification (ultra-high-performance liquid chromatography-quadrupole time-of-flight ultrahigh-resolution mass spectrometry). Microbial contamination differed depending on the dump and the group of tested microorganisms. The number of bacteria was: 4.3 × 102 - 1.8 × 103 CFU m-3 (air); 1.1 × 103 - 1.2 × 106 CFU mL-1 (leachate); 1.0 × 106 - 3.9 × 106 CFU g-1 (soil). Respectively, for air and soil the number of fungi was: 2.2 × 102 - 4.6 × 102 CFU m-3; 1.8 × 102 - 3.9 × 103 CFU g-1. Metal levels (Fe, Mn, Pb, Zn, Al, Hg, Cd, Cu, Cr) were higher than in the control sample; however, the average concentrations did not exceed the permissible standards. The cytotoxicity of soil and leachate samples depended on the dump, sample and cell line tested. The leachates were more cytotoxic than soil extracts. Compounds belonging to pesticides, surfactants and biocides, chemicals and/or polymer degradation products, medicinal drugs and insect repellents were found. The detection of potential pathogens in the air, soil and leachate, the presence of toxic compounds and the confirmation of the cytotoxic effect of leachate and soil on human cell lines justify the need for further research on the risks posed by illegal dumps. These studies should aim at developing a unified assessment method and a method to minimise the risk of contaminants spreading in the environment, including harmful biological agents.
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Affiliation(s)
- Justyna Szulc
- Department of Environmental Biotechnology, Lodz University of Technology, Łódź, 90-530, Poland.
| | - Joanna Nizioł
- Faculty of Chemistry, Rzeszów University of Technology, Rzeszów, 35-959, Poland.
| | - Tomasz Ruman
- Faculty of Chemistry, Rzeszów University of Technology, Rzeszów, 35-959, Poland.
| | - Anna Kuźniar
- Faculty of Chemistry, Rzeszów University of Technology, Rzeszów, 35-959, Poland.
| | - Adriana Nowak
- Department of Environmental Biotechnology, Lodz University of Technology, Łódź, 90-530, Poland.
| | - Małgorzata Okrasa
- Department of Personal Protective Equipment, Central Institute for Labour Protection - National Research Institute, Łódź, 90-133, Poland.
| | - Ireneusz Nowak
- Faculty of Law and Administration, University of Lodz, Kopcinskiego 8/12, Łódź, 90-232, Poland.
| | - Bogumiła Szponar
- Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, 53-113, Poland.
| | - Sławomir Kuberski
- Faculty of Process and Environmental Engineering, Lodz University of Technology, Łódź, 93-005, Poland.
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Kang MS, Lee JE. Four Cases of Toxic Anterior Syndrome after Cataract Surgery under Intracameral 0.5% Lidocaine Anesthesia. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2022. [DOI: 10.3341/jkos.2022.63.1.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Purpose: To report four cases of toxic anterior segment syndrome after cataract surgery under intracameral 0.5% lidocaine anesthesia.Case summary: Four patients had a decrease in visual acuity within 3 days of undergoing cataract surgery. There was evidence of anterior chamber inflammation with corneal edema and opacity. Toxic anterior segment syndrome was diagnosed on the basis of negative microbial cultures and clinical features. Three patients were treated with systemic and topical steroids, and one was treated with topical steroids only. Three months postoperatively, three patients had good visual acuity without inflammation or corneal edema. However, one patient, who did not receive systemic steroids, exhibited persistent corneal edema and required endothelial keratoplasty.Conclusions: Toxic anterior segment syndrome is a surgical complication that requires immediate treatment. Systemic steroids can be helpful with topical steroids. Clinicians should ensure that measures are taken to avoid contamination of surgical procedure with toxic substances to prevent toxic anterior segment syndrome.
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Ogawa H, Kusumoto J, Nomura T, Hashikawa K, Terashi H, Sakakibara S. Wire Myography for Continuous Estimation of the Optimal Concentration of Topical Lidocaine as a Vasodilator in Microsurgery. J Reconstr Microsurg 2021; 37:541-550. [PMID: 33517569 DOI: 10.1055/s-0040-1722759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND Intraoperative vasospasm during reconstructive microvascular surgery is often unpredictable and may lead to devastating flap loss. Therefore, various vasodilators are used in reconstructive microsurgery to prevent and relieve vasospasm. Lidocaine is a vasodilator commonly used in microvascular surgery. Although many reports have described its in vitro and in vivo concentration-dependent vasodilatory effects, limited studies have examined the pharmacological effects of lidocaine on blood vessels in terms of persistence and titer. METHODS In this study, the vasodilatory effect of lidocaine was examined by using the wire myograph system. Abdominal aortas were harvested from female rats, sliced into rings of 1-mm thickness, and mounted in the wire myograph system. Next, 10, 5, 2, and 1% lidocaine solutions were applied to the artery, and the change in vasodilation force, persistence of the force, and time required to reach equilibrium were measured. RESULTS The vasodilatory effect was confirmed in all groups following lidocaine treatment. Although strong vasodilation was observed in the 10% lidocaine group, it was accompanied by irreversible degeneration of the artery. Vasodilation in the 1% lidocaine group was weaker than that in the other groups 500 seconds after lidocaine addition (p < 0.05). Between the 5 and 2% lidocaine groups, 5% lidocaine showed a stronger vasodilatory effect 400 to 600 seconds after lidocaine addition (p < 0.01); however, there was no significant difference in these groups after 700 seconds. Additionally, there was no difference in the time required for the relaxation force to reach equilibrium among the 5, 2, and 1% lidocaine groups. CONCLUSION Although our study confirmed the dose-dependent vasodilatory effect of lidocaine, 5% lidocaine showed the best vasodilatory effect and continuity with minimal irreversible changes in the arterial tissue.
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Affiliation(s)
- Haruo Ogawa
- Department of Plastic Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Junya Kusumoto
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Tadashi Nomura
- Department of Plastic Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Kazunobu Hashikawa
- Department of Plastic Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Hiroto Terashi
- Department of Plastic Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Shunsuke Sakakibara
- Department of Plastic Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan
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Park A, Hardin JS, Bora NS, Morshedi RG. Effects of Lidocaine on Mitomycin C Cytotoxicity. Ophthalmol Glaucoma 2020; 4:330-335. [PMID: 33080409 DOI: 10.1016/j.ogla.2020.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/05/2020] [Accepted: 10/09/2020] [Indexed: 11/15/2022]
Abstract
PURPOSE Intra-Tenon or subconjunctival injection of a solution of mitomycin C (MMC) and 1% preservative-free lidocaine (as an anesthetic) has gained popularity for its use in trabeculectomy, a filtering surgery for glaucoma. To our knowledge, no studies have analyzed the impact of lidocaine on the cytotoxic effects of MMC in this setting. This study was conducted to evaluate in vitro fibroblast cytotoxicity to a solution of MMC (0.2 mg/ml) and 1% preservative-free lidocaine. DESIGN Experimental study. PARTICIPANTS Nonhuman subject research. METHODS Cultured human conjunctival fibroblasts were incubated in phosphate-buffered saline (PBS) (control), MMC (0.2 mg/ml), a mixture of 0.2 mg/ml MMC + 1% preservative-free lidocaine, or 1% preservative-free lidocaine. Samples were taken at 2, 5, 10, 30, and 60 minutes, and a 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide (MTT) assay with photoabsorbance testing was used to assess conjunctival cell viability. MAIN OUTCOME MEASURE Mean photoabsorbance. RESULTS Mean photoabsorbance across all time intervals was 0.680 for solutions incubated in PBS, 0.642 for MMC, 0.612 for MMC + 1% preservative-free lidocaine, and 0.605 for 1% preservative-free lidocaine. A 2-way analysis of variance analyzing solution, time, and solution-time interaction on photoabsorbance showed that PBS was least cytotoxic and an optimal control for this study. Tukey post hoc comparisons showed that MMC was more cytotoxic than PBS (P < 0.001). However, both MMC + 1% preservative-free lidocaine and 1% preservative-free lidocaine were more cytotoxic than MMC and PBS (P < 0.01 for all). No significant differences in cytotoxicity comparing lidocaine-containing solutions were observed. CONCLUSIONS In this in vitro study, we found an increase in cytotoxicity when MMC (0.2 mg/ml) was combined with 1% preservative-free lidocaine. We note that lidocaine did not inhibit MMC cytotoxicity and exhibited a significant cytotoxic effect on its own.
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Affiliation(s)
- Abraham Park
- Department of Ophthalmology, Loma Linda University, Loma Linda, California
| | - Joshua S Hardin
- Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland.
| | - Nalini S Bora
- Jones Eye Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas
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Jiang GJ, Fan TJ. Novel techniques to prevent apoptosis and improve regeneration in corneal endothelial cells. EXPERT REVIEW OF OPHTHALMOLOGY 2020. [DOI: 10.1080/17469899.2020.1794821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Guo-Jian Jiang
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, China
| | - Ting-Jun Fan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, China
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Fan TJ, Wu SX, Jiang GJ. Apoptotic effects of norfloxacin on corneal endothelial cells. Naunyn Schmiedebergs Arch Pharmacol 2019; 393:77-88. [PMID: 31420720 DOI: 10.1007/s00210-019-01711-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 08/07/2019] [Indexed: 01/17/2023]
Abstract
Norfloxacin, a frequently used ocular antibiotic, might have cytotoxic effect on human corneal endothelial cells (HCECs), subsequently damage the cornea and finally impair human vision. However, the possible mechanisms of cytotoxicity of norfloxacin to HCEC line are unclear. Herein, we investigated the cytotoxicity of norfloxacin and its underlying cellular and molecular mechanisms using in vitro cultured non-transfected HCECs and verified the cytotoxicity with cat corneal endothelium in vivo. In the present study, the cytotoxicity of norfloxacin in the in vitro cultured HCECs was recognized by causing abnormal morphology such as cell shrinkage and detachment from plate bottom, and decline of viability of in vitro cultured HCECs. Then, its cytotoxicity was verified by inducing reduction of cell density and morphological abnormality of in vivo cat corneal endothelial cells. Furthermore, the cytotoxicity of norfloxacin in HCECs was corroborated as apoptosis by elevation of plasma membrane permeability, S phase arrest, phosphatidylserine externalization, DNA fragmentation, and apoptotic body formation in in vitro cultured HCECs and apoptosis-like swollen cells in the in vivo model. Moreover, norfloxacin induced extrinsic death receptor-mediated apoptosis pathway by activating caspase-2/-8/-3 and intrinsic mitochondrion-dependent apoptosis pathway by downregulating anti-apoptotic Bcl-2 and upregulating of pro-apoptotic Bad, which disrupted mitochondrial transmembrane potential, subsequently upregulated cytoplasmic cytochrome c and apoptosis-inducing factor and finally activated caspase-9/-3. Generally, norfloxacin induces HCE cell apoptosis via a death receptor-mediated and mitochondrion-dependent signaling pathway.
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Affiliation(s)
- Ting-Jun Fan
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Yushan Road No. 5, Qingdao, 266003, China
| | - Shu-Xian Wu
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Yushan Road No. 5, Qingdao, 266003, China
| | - Guo-Jian Jiang
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Yushan Road No. 5, Qingdao, 266003, China.
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Sodium Ferulate Attenuates Lidocaine-Induced Corneal Endothelial Impairment. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:4967318. [PMID: 30116483 PMCID: PMC6079406 DOI: 10.1155/2018/4967318] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 06/03/2018] [Indexed: 11/23/2022]
Abstract
The introduction of intracameral anaesthesia by injection of lidocaine has become popular in cataract surgery for its inherent potency, rapid onset, tissue penetration, and efficiency. However, intracameral lidocaine causes corneal thickening, opacification, and corneal endothelial cell loss. Herein, we investigated the effects of lidocaine combined with sodium ferulate, an antioxidant with antiapoptotic and anti-inflammatory properties, on lidocaine-induced damage of corneal endothelia with in vitro experiment of morphological changes and cell viability of cultured human corneal endothelial cells and in vivo investigation of corneal endothelial cell density and central corneal thickness of cat eyes. Our finding indicates that sodium ferulate from 25 to 200 mg/L significantly reduced 2 g/L lidocaine-induced toxicity to human corneal endothelial cells, and 50 mg/L sodium ferulate recovered the damaged human corneal endothelial cells to normal growth status. Furthermore, 100 mg/L sodium ferulate significantly inhibited lidocaine-induced corneal endothelial cell loss and corneal thickening in cat eyes. In conclusion, sodium ferulate protects human corneal endothelial cells from lidocaine-induced cytotoxicity and attenuates corneal endothelial cell loss and central corneal thickening of cat eyes after intracameral injection with lidocaine. It is likely that the antioxidant effect of sodium ferulate reduces the cytotoxic and inflammatory corneal reaction during intracameral anaesthesia.
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Song Z, Fan TJ. Tetracaine induces apoptosis through a mitochondrion-dependent pathway in human corneal stromal cells in vitro. Cutan Ocul Toxicol 2018; 37:350-358. [PMID: 29742927 DOI: 10.1080/15569527.2018.1468342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
PURPOSE Tetracaine is a local anesthetic widely used in ocular diagnosis and ophthalmic surgery and may lead to some adverse effects and complications at a clinical dose. To assess the cytotoxicity and molecular toxicity mechanisms of tetracaine, we used human corneal stromal (HCS) cells as an in vitro model to study the effects of tetracaine on HCS cells. MATERIALS AND METHODS The cytotoxicity of tetracaine on HCS cells was investigated by examining the changes of cell growth, morphology, viability and cell cycle progressing when HCS cells were treated with tetracaine at concentrations from 10 g/L to 0.078125 g/L. To prove the hypothesis that the cytotoxicity of tetracaine on HCS cells was related with apoptosis induction, we further detected multiple changes in HCS cells, including plasma membrane (PM) permeability, phosphatidylserine (PS) orientation, genomic DNA integrality, and cell ultrastrcuture after treated with tetracaine. Furthermore, the pro-apoptotic signalling pathway induced by tetracaine was explored through detecting the activation of various caspases, the changes of mitochondrial transmembrane potential (MTP), the expression level of Bcl-2 family proteins and the amount of mitochondria-released apoptosis regulating proteins in cytoplasm. RESULTS Tetracaine at concentrations above 0.15625 g/L had a dose- and time-dependent cytotoxicity to HCS cells, which resulted cell growth inhibition, proliferation retardation, morphological abnormalities and decreased viability. Meanwhile, we found that the HCS cells treated with tetracaine had typical features associated with apoptosis, including an increase in PM permeability, PS externalization, DNA fragmentation and apoptotic body formation. Tetracaine not only resulted in caspase-3, caspase-8 and caspase-9 activation and disruption of MTP but also downregulated Bcl-2 and Bcl-xL and upregulated Bad and Bax, along with the upregulation of cytoplasmic cytochrome c (Cyt. c) and apoptosis-inducing factor (AIF). CONCLUSIONS These results suggested that tetracaine-induced apoptosis might be triggered through Fas death receptors and mediated by Bcl-2 family proteins in the mitochondria-dependent pathway. Our findings identified the cytotoxicity and molecular mechanisms of tetracaine, which could provide a reference value for the safety of this medication and prospective therapeutic interventions in eye clinic.
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Affiliation(s)
- Zhan Song
- a Laboratory for Corneal Tissue Engineering , College of Marine Life Sciences, Ocean University of China , Qingdao , Shandong province , P. R. China
| | - Ting-Jun Fan
- a Laboratory for Corneal Tissue Engineering , College of Marine Life Sciences, Ocean University of China , Qingdao , Shandong province , P. R. China
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Bai SR, Fan TJ. Cytotoxic effect of proparacaine on human corneal epithelial cells and its possible mechanisms. Mol Cell Toxicol 2017. [DOI: 10.1007/s13273-017-0003-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shen JW, Shan M, Peng YY, Fan TJ. Cytotoxic Effect of Latanoprost on Human Corneal Stromal Cells in vitro and its Possible Mechanisms. Curr Eye Res 2016; 42:534-541. [DOI: 10.1080/02713683.2016.1225770] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jun-Wei Shen
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Ming Shan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Yuan-Yuan Peng
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Ting-Jun Fan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
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Fan WY, Sui YL, Fan TJ. Proparacaine induces cytotoxicity and mitochondria-dependent apoptosis in corneal stromal cells both in vitro and in vivo. Toxicol Res (Camb) 2016; 5:1434-1444. [PMID: 30090447 DOI: 10.1039/c6tx00286b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 07/05/2016] [Indexed: 12/13/2022] Open
Abstract
Proparacaine (PPC) is a widely used topical anaesthetic in the eye clinic; its abuse may damage the cornea and result in impairment of vision. Although PPC has been reported to be cytotoxic to human keratocytes, there is no scientific report about its toxic mechanisms in human corneal stroma. Here, we evaluated the cytotoxicity of PPC to corneal stroma in an in vitro model of human corneal stromal (HCS) cells and an in vivo model of cat corneas. To postulate the cellular and molecular mechanisms involved in PPC toxicity, changes in the hallmarks of apoptosis as well as in pro-apoptotic signaling pathways were investigated. Our results showed that PPC at concentrations varying from 5.0 to 0.15625 g L-1 induced dose- and time-dependent cell atrophy, vacuolation, cytopathic effects, and viability decline in vitro. Moreover, PPC induced G1 phase arrest, plasma membrane permeability elevation, phosphatidylserine externalization, DNA fragmentation, chromatin condensation, and apoptotic body formation of HCS cells. Furthermore, PPC could induce caspase-2, -3 and -9 activation, and mitochondrial transmembrane potential disruption. Expression of Bcl-xL and Bax were downregulated and upregulated, respectively, and cytoplasmic cytochrome c and apoptosis inducing factor were upregulated remarkably after PPC treatment. The cytotoxicity and pro-apoptotic effects of PPC were also proven by induced corneal edema, apoptotic-like ultrastructural alterations and DNA fragmentation of keratocytes in cat corneas in vivo. These results suggest that PPC above 1/32 of its clinical dosage has remarkable cytotoxicity to corneal stromal cells, which is achieved by inducing death receptor-mediated mitochondria-dependent apoptosis of HCS cells.
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Affiliation(s)
- Wen Yi Fan
- Key Laboratory for Corneal Tissue Engineering , College of Marine Life Sciences , Ocean University of China , Qingdao 266003 , China . ; Tel: +86 (0) 532 82031637
| | - Yun Long Sui
- Key Laboratory for Corneal Tissue Engineering , College of Marine Life Sciences , Ocean University of China , Qingdao 266003 , China . ; Tel: +86 (0) 532 82031637
| | - Ting Jun Fan
- Key Laboratory for Corneal Tissue Engineering , College of Marine Life Sciences , Ocean University of China , Qingdao 266003 , China . ; Tel: +86 (0) 532 82031637
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Fan WY, Wang DP, Wen Q, Fan TJ. The cytotoxic effect of oxybuprocaine on human corneal epithelial cells by inducing cell cycle arrest and mitochondria-dependent apoptosis. Hum Exp Toxicol 2016; 36:765-775. [PMID: 27590991 DOI: 10.1177/0960327116665676] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oxybuprocaine (OBPC) is a widely used topical anesthetic in eye clinic, and prolonged and repeated usage of OBPC might be cytotoxic to the cornea, especially to the outmost corneal epithelium. In this study, we characterized the cytotoxic effect of OBPC on human corneal epithelial (HCEP) cells and investigated its possible cellular and molecular mechanisms using an in vitro model of non-transfected HCEP cells. Our results showed that OBPC at concentrations ranging from 0.025% to 0.4% had a dose- and time-dependent cytotoxicity to HCEP cells. Moreover, OBPC arrested the cells at S phase and induced apoptosis of these cells by inducing plasma membrane permeability, phosphatidylserine externalization, DNA fragmentation, and apoptotic body formation. Furthermore, OBPC could trigger the activation of caspase-2, -3, and -9, downregulate the expression of Bcl-xL, upregulate the expression of Bax along with the cytoplasmic amount of mitochondria-released apoptosis-inducing factor, and disrupt mitochondrial transmembrane potential. Our results suggest that OBPC has a dose- and time-dependent cytotoxicity to HCEP cells by inducing cell cycle arrest and cell apoptosis via a death receptor-mediated mitochondria-dependent proapoptotic pathway, and this novel finding provides new insights into the acute cytotoxicity and its toxic mechanisms of OBPC on HCEP cells.
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Affiliation(s)
- W-Y Fan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, People's Republic of China
| | - D-P Wang
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, People's Republic of China
| | - Q Wen
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, People's Republic of China
| | - T-J Fan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, People's Republic of China
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Shan M, Fan TJ. Cytotoxicity of carteolol to human corneal epithelial cells by inducing apoptosis via triggering the Bcl-2 family protein-mediated mitochondrial pro-apoptotic pathway. Toxicol In Vitro 2016; 35:36-42. [DOI: 10.1016/j.tiv.2016.05.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 05/09/2016] [Accepted: 05/19/2016] [Indexed: 01/09/2023]
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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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16
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Pang X, Fan TJ. Cytotoxic effect and possible mechanisms of Tetracaine on human corneal epithelial cells in vitro. Int J Ophthalmol 2016; 9:497-504. [PMID: 27162719 DOI: 10.18240/ijo.2016.04.04] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 12/25/2015] [Indexed: 11/23/2022] Open
Abstract
AIM To demonstrate the cytotoxic effect and possible mechanisms of Tetracaine on human corneal epithelial (HCEP) cells in vitro. METHODS In vitro cultured HCEP cell were treated with Tetracaine hydrochloride at different doses for different times, and their morphology, viability, and plasma membrane permeability were detected by light microscopy, methyl thiazolyl tetrazolium (MTT) assay, and acridine orange (AO)/ethidium bromide (EB) staining, respectively. Their cell cycle progression, phosphatidylserine orientation in plasma membrane, and mitochondrial membrane potential (MTP) were assessed by flow cytometry. DNA fragmentation, ultrastructure, caspase activation, and the cytoplasmic apoptosis inducing factor (AIF) and cytochrome c (Cyt. c) along with the expression of B-cell lymphoma-2 (Bcl-2) family proteins were examined by gel electrophoresis, transmission electron microscope, enzyme linked immunosorbent assay (ELISA), and Western blot, respectively. RESULTS After exposed to Tetracaine at doses from 10.0 to 0.3125 g/L, the HCEP cells showed dose- and time-dependent morphological abnormality and typical cytopathic effect, viability decline, and plasma membrane permeability elevation. Tetracaine induced phosphatidylserine externalization, DNA fragmentation, G1 phase arrest, and ultrastructural abnormality and apoptotic body formation. Furthermore, Tetracaine at a dose of 0.3125 g/L also induced caspase-3, -9 and -8 activation, MTP disruption, up-regulation of the cytoplasmic amount of Cyt. c and AIF, the expressions of Bax and Bad, and down-regulation of the expressions of Bcl-2 and Bcl-xL. CONCLUSION Tetracaine above 0.3125 g/L (1/32 of its clinical applied dosage) has a dose- and time-dependent cytotoxicity to HCEP cells in vitro, with inducing cell apoptosis via a death receptor-mediated mitochondrion-dependent pathway.
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Affiliation(s)
- Xin Pang
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Ting-Jun Fan
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
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17
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Wen Q, Fan TJ, Tian CL. Cytotoxicity of atropine to human corneal endothelial cells by inducing mitochondrion-dependent apoptosis. Exp Biol Med (Maywood) 2016; 241:1457-65. [PMID: 27022135 DOI: 10.1177/1535370216640931] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 02/29/2016] [Indexed: 11/16/2022] Open
Abstract
Atropine, a widely used topical anticholinergic drug, might have adverse effects on human corneas in vivo. However, its cytotoxic effect on human corneal endothelium (HCE) and its possible mechanisms are unclear. Here, we investigated the cytotoxicity of atropine and its underlying cellular and molecular mechanisms using an in vitro model of HCE cells and verified the cytotoxicity using cat corneal endothelium (CCE) in vivo. Our results showed that atropine at concentrations above 0.3125 g/L could induce abnormal morphology and viability decline in a dose- and time-dependent manner in vitro. The cytotoxicity of atropine was proven by the induced density decrease and abnormality of morphology and ultrastructure of CCE cells in vivo. Meanwhile, atropine could also induce dose- and time-dependent elevation of plasma membrane permeability, G1 phase arrest, phosphatidylserine externalization, DNA fragmentation, and apoptotic body formation of HCE cells. Moreover, 2.5 g/L atropine could also induce caspase-2/-3/-9 activation, mitochondrial transmembrane potential disruption, downregulation of anti-apoptotic Bcl-2 and Bcl-xL, upregulation of pro-apoptotic Bax and Bad, and upregulation of cytoplasmic cytochrome c and apoptosis-inducing factor. In conclusion, atropine above 1/128 of its clinical therapeutic dosage has a dose- and time-dependent cytotoxicity to HCE cells in vitro which is confirmed by CCE cells in vivo, and its cytotoxicity is achieved by inducing HCE cell apoptosis via a death receptor-mediated mitochondrion-dependent signaling pathway. Our findings provide new insights into the cytotoxicity and apoptosis-inducing effect of atropine which should be used with great caution in eye clinic.
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Affiliation(s)
- Qian Wen
- 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
| | - Cheng-Lei Tian
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
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18
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Aguirre JA, Lucchinetti E, Clanachan AS, Plane F, Zaugg M. Unraveling Interactions Between Anesthetics and the Endothelium. Anesth Analg 2016; 122:330-48. [DOI: 10.1213/ane.0000000000001053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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19
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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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20
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Williams DW, Tesfa L, Berman JW. Novel flow cytometric analysis of the blood-brain barrier. Cytometry A 2015; 87:897-907. [PMID: 25929817 PMCID: PMC4859441 DOI: 10.1002/cyto.a.22683] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Revised: 03/20/2015] [Accepted: 04/11/2015] [Indexed: 12/13/2022]
Abstract
The blood-brain barrier (BBB) is primarily comprised of brain microvascular endothelial cells (BMVEC) and astrocytes and serves as a physical and chemical barrier that separates the periphery from the brain. We describe a flow cytometric method using our in vitro model of the human BBB to characterize BMVEC surface junctional proteins critical for maintenance of barrier function, cell viability, and leukocyte adhesion. For this methodology, BMVEC are cocultured with astrocytes in a transwell tissue culture insert to establish the barrier, after which time the BBB are treated with specific agents, and the BMVEC collected for flow cytometric analyses. We use a standard and optimized method to recover the BMVEC from the coculture model that maintains junctional protein expression and cell viability. A novel leukocyte adhesion assay enables a quantitative analysis of peripheral blood mononuclear cell (PBMC) interactions with the BMVEC and can be used to assess the adhesion of many cell types to the BBB. Furthermore, this method enables the concomitant analysis of a large number of adhesion molecules and tight junction proteins on both the BMVEC and adherent PBMC under homeostatic and pathologic conditions. Flow cytometry is an extremely powerful tool, and this technique can also be applied to assess variables not performed in this study, including cell cycle progression, and calcium flux.
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Affiliation(s)
- Dionna W. Williams
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, 10461
| | - Lydia Tesfa
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, 10461
| | - Joan W. Berman
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, 10461
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, 10461
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Green PG, Alvarez P, Levine JD. Topical Tetrodotoxin Attenuates Photophobia Induced by Corneal Injury in the Rat. THE JOURNAL OF PAIN 2015; 16:881-6. [PMID: 26086898 DOI: 10.1016/j.jpain.2015.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 05/27/2015] [Accepted: 06/04/2015] [Indexed: 11/24/2022]
Abstract
Corneal injury can produce photophobia, an aversive sensitivity to light. Using topical application of lidocaine, a local anesthetic, and tetrodotoxin (TTX), a selective voltage-sensitive sodium channel blocker, we assessed whether enhanced aversiveness to light induced by corneal injury in rats was caused by enhanced activity in corneal afferents. Eye closure induced by 30 seconds of exposure to bright light (460-485 nm) was increased 24 hours after corneal injury induced by de-epithelialization. Although the topical application of lidocaine did not affect the baseline eye closure response to bright light in control rats, it eliminated the enhancement of the response to the light stimulus after corneal injury (photophobia). Similarly, topical application of TTX had no effect on the eye closure response to bright light in rats with intact corneas, but it markedly attenuated photophobia in rats with corneal injury. Given the well-established corneal toxicity of local anesthetics, we suggest TTX as a therapeutic option to treat photophobia and possibly other symptoms that occur in clinical diseases that involve corneal nociceptor sensitization. Perspective: We show that lidocaine and TTX attenuate photophobia induced by corneal injury. Although corneal toxicity limits use of local anesthetics, TTX may be a safer therapeutic option to reduce the symptom of photophobia associated with corneal injury.
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Affiliation(s)
- Paul G Green
- Department of Oral & Maxillofacial Surgery, University of California at San Francisco, San Francisco, California; Department of Preventative & Restorative Dental Sciences, University of California at San Francisco, San Francisco, California; Division of Neuroscience, University of California at San Francisco, San Francisco, California
| | - Pedro Alvarez
- Department of Oral & Maxillofacial Surgery, University of California at San Francisco, San Francisco, California; Division of Neuroscience, University of California at San Francisco, San Francisco, California
| | - Jon D Levine
- Department of Oral & Maxillofacial Surgery, University of California at San Francisco, San Francisco, California; Division of Neuroscience, University of California at San Francisco, San Francisco, California; Department of Dental Science and Medicine, University of California at San Francisco, San Francisco, California.
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22
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Wen Q, Fan T, Bai S, Sui Y. Cytotoxicity of proparacaine to human corneal endothelial cells in vitro . J Toxicol Sci 2015; 40:427-36. [DOI: 10.2131/jts.40.427] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Qian Wen
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
| | - Tingjun Fan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
| | - Suran Bai
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
| | - Yunlong Sui
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
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Wang WZ, Fang XH, Williams SJ, Stephenson LL, Baynosa RC, Khiabani KT, Zamboni WA. Lidocaine-induced ASC apoptosis (tumescent vs. local anesthesia). Aesthetic Plast Surg 2014; 38:1017-23. [PMID: 25099499 DOI: 10.1007/s00266-014-0387-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 06/30/2014] [Indexed: 02/08/2023]
Abstract
BACKGROUND The purpose for the present study was to determine which anesthetic method, local anesthesia versus tumescent, is superior for liposuction in terms of adipose-derived stem cell (ASC) survival in lipoaspirate; which component, lidocaine versus lidocaine with epinephrine, in anesthetic solutions could affect ASC survival; and which mechanism, necrosis versus apoptosis, is involved in lidocaine-induced ASC death. METHODS Human lipoaspirates were harvested using standard liposuction technique. Individuals scheduled for liposuction on bilateral body areas gave consent and were included in the study. On one area, liposuction was conducted under local anesthesia with lidocaine/epinephrine. On the contralateral area, liposuction was accomplished with tumescent wetting solution containing lidocaine/epinephrine. Lipoaspirates were processed for the isolation of stromal vascular fraction (SVF). ASC survival was determined by the number of adherent ASCs after 24 h of SVF culture. Lidocaine dose-response (with or without epinephrine) on cultured ASCs was examined. Lidocaine-induced ASC apoptosis and necrosis was determined by Annexin V-FITC/Propidium Iodide (PI) assay and analyzed by flow cytometry. RESULTS All of the participants were female adults. The average age was 45 ± 4.0 years (±SEM) and the average BMI was 28 ± 1.0 (±SEM). Lipoaspirate samples (n = 14) treated by local anesthesia (n = 7/group) or tumescent anesthesia (n = 7/group) were investigated. Liposuction sites were located in the hip or thigh. The average number of adherent ASCs was 1,057 ± 146 k in the local anesthesia group, which was significantly lower than the 1,571 ± 111 k found in the tumescent group (P = 0.01). ASC survival was significantly lower in the lidocaine group and in a dose-dependent manner as compared to the correspondent PBS controls (P < 0.05 or P < 0.01). ASC survival was significantly lower in both the lidocaine and lidocaine with epinephrine groups when compared to PBS controls. Annexin/PI assay showed that ASC apoptosis (but not necrosis) in the lidocaine group was significantly higher than that in the corresponding PBS control (P = 0.026). CONCLUSIONS Tumescent anesthesia is the superior method for liposuction with respect to ASC preservation compared to local anesthesia. Lidocaine could cause significant ASC apoptosis.
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