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Matsuda Y, Machida M, Nakagami Y, Nakajima T, Azuma M. NFE2L2 activator RS9 protects against corneal epithelial cell damage in dry eye models. PLoS One 2020; 15:e0229421. [PMID: 32320433 PMCID: PMC7176120 DOI: 10.1371/journal.pone.0229421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 02/05/2020] [Indexed: 12/26/2022] Open
Abstract
Oxidative stress may cause ocular surface damage during the development of dry eye. Mammalian cells have defense systems against oxidative stress. A central regulator of the stress response is nuclear factor-erythroid 2-related factor 2 (NFE2L2). NFE2L2 is activated by the novel triterpenoid RS9 (a biotransformation compound of RTA 402). The purpose of this study was to assess the efficacy of RS9 against dry eye using in vitro and in vivo models. Bioactivity was estimated by the induction of mRNAs for two NFE2L2-targeted genes: NQO1 (prevents radical species) and GCLC (glutathione synthesis), using a corneal epithelial cell line (HCE-T). Protection against oxidation and cell damage was tested in vitro by culturing cells under hyperosmotic stress or by the addition of menadione, a generator of reactive oxygen species (ROS). Dry eye in vivo was induced by the injection of scopolamine into rats. Then, 930 nM of RS9 was applied to both eyes for 2 weeks. Oxidative stress was measured by the accumulation of 8-hydroxy-2’-deoxyguanosine (8-OHdG). Corneal wound healing was measured by scoring for superficial punctate keratitis (SPK). Corneal epithelial cell densities were evaluated histologically. RS9 and RTA 402 induced the expression of NQO1 and GCLC mRNAs in HCE-T cells. And both compounds suppressed hyperosmotic-ROS generation and menadione induced cellular damage. However RS9 had a stronger protective effect than RTA 402. Ocular instillation of RS9 also significantly upregulated the expression of Nqo1 mRNA in the corneal epithelium. Accumulation of 8-OHdG, increase of SPK scores and decrement of basal cell density were observed in corneal epithelium from scopolamine-injected rats. These changes were significantly ameliorated by the topical administration of RS9. RS9 induced Nfe2l2 activation and Nfe2l2-targeted genes, reduced oxidation, and ameliorated symptoms of dry eye using in vitro and in vivo models. Thus, RS9 might be a potent candidate agent against dry eye disease.
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Affiliation(s)
- Yuka Matsuda
- Senju Laboratory of Ocular Sciences, Senju Pharmaceutical Co., Ltd., Kobe, Japan
| | - Mamiko Machida
- Senju Laboratory of Ocular Sciences, Senju Pharmaceutical Co., Ltd., Kobe, Japan
| | | | - Takeshi Nakajima
- Senju Laboratory of Ocular Sciences, Senju Pharmaceutical Co., Ltd., Kobe, Japan
- * E-mail:
| | - Mitsuyoshi Azuma
- Senju Laboratory of Ocular Sciences, Senju Pharmaceutical Co., Ltd., Kobe, Japan
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Kiptiyah K, Widodo W, Ciptadi G, Aulanni'Am A, Widodo MA, Sumitro SB. 10-gingerol induces oxidative stress through HTR1A in cumulus cells: in-vitro and in-silico studies. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2020; 17:/j/jcim.ahead-of-print/jcim-2019-0042/jcim-2019-0042.xml. [PMID: 32284444 DOI: 10.1515/jcim-2019-0042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 10/24/2019] [Indexed: 01/04/2023]
Abstract
Background We investigated whether 10-gingerol is able to induce oxidative stress in cumulus cells. Methods For the in-vitro research, we used a cumulus cell culture in M199, containing 10-gingerol in various concentrations (0, 12, 16, and 20 µM), and detected oxidative stress through superoxide dismutase (SOD) activity and malondialdehyde (MDA) concentrations, with incubation periods of 24, 48, 72, and 96 h. The obtained results were confirmed by in-silico studies. Results The in-vitro data revealed that SOD activity and MDA concentration increased with increasing incubation periods: SOD activity at 0 µM (1.39 ± 0.24i), 12 µM (16.42 ± 0.35ab), 16 µM (17.28 ± 0.55ab), 20 µM (17.81 ± 0.12a), with a contribution of 71.1%. MDA concentration at 0 µM (17.82 ± 1.39 l), 12 µM (72.99 ± 0.31c), 16 µM (79.77 ± 4.19b), 20 µM (85.07 ± 2.57a), with a contribution of 73.1%. Based on this, the in-silico data uncovered that 10-gingerol induces oxidative stress in cumulus cells by inhibiting HTR1A functions and inactivating GSK3B and AKT-1. Conclusions 10-gingerol induces oxidative stress in cumulus cells through enhancing SOD activity and MDA concentration by inhibiting HTR1A functions and inactivating GSK3B and AKT-1.
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Affiliation(s)
- Kiptiyah Kiptiyah
- Department of Biology, Maulana Malik Ibrahim Islamic State University of Malang, Malang 65144, Indonesia
| | - Widodo Widodo
- Department of Biology, Brawijaya University of Malang, Malang, Indonesia
| | - Gatot Ciptadi
- Husbandry Faculty, Brawijaya University of Malang, Malang, Indonesia
| | | | - Mohammad A Widodo
- Biomedical Study Programme, Brawijaya University of Malang, Malang, Indonesia
| | - Sutiman B Sumitro
- Department of Biology, Brawijaya University of Malang, Malang, Indonesia
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Progressive Rotavirus Infection Downregulates Redox-Sensitive Transcription Factor Nrf2 and Nrf2-Driven Transcription Units. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:7289120. [PMID: 32322337 PMCID: PMC7165344 DOI: 10.1155/2020/7289120] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/31/2020] [Accepted: 02/10/2020] [Indexed: 12/13/2022]
Abstract
Eukaryotic cells adopt highly tuned stress response physiology under threats of exogenous stressors including viruses to maintain cellular homeostasis. Not surprisingly, avoidance of cellular stress response pathways is an essential facet of virus-induced obligatory host reprogramming to invoke a cellular environment conducive to viral perpetuation. Adaptive cellular responses to oxidative and electrophilic stress are usually taken care of by an antioxidant defense system, core to which lies the redox-responsive transcription factor nuclear factor erythroid 2-related factor 2 (Nrf2) and Nrf2-driven transcriptional cascade. Deregulation of host redox balance and redox stress-sensitive Nrf2 antioxidant defense have been reported for many viruses. In the current study, we aimed to study the modulation of the Nrf2-based host cellular redox defense system in response to Rotavirus (RV) infection in vitro. Interestingly, we found that Nrf2 protein levels decline sharply with progression of RV infection beyond an initial upsurge. Moreover, Nrf2 decrease as a whole was found to be accompanied by active nuclear vacuity of Nrf2, resulting in lowered expression of stress-responsive Nrf2 target genes heme oxygenase-1 (HO-1), NAD(P)H quinone dehydrogenase 1, and superoxide dismutase 1 both in the presence and absence of Nrf2-driven transcriptional inducers. Initial induction of Nrf2 concurred with RV-induced early burst of oxidative stress and therefore was sensitive to treatments with antioxidants. Reduction of Nrf2 levels beyond initial hours, however, was found to be independent of the cellular redox status. Furthermore, increasing the half-life of Nrf2 through inhibition of the Kelch-like erythroid cell-derived protein with CNC homology- (ECH-) associated protein 1/Cullin3-RING Box1-based canonical Nrf2 turnover pathway could not restore Nrf2 levels post RV-SA11 infection. Depletion of the Nrf2/HO-1 axis was subsequently found to be sensitive to proteasome inhibition with concurrent observation of increased K48-linked ubiquitination associated with Nrf2. Together, the present study describes robust downregulation of Nrf2-dependent cellular redox defense beyond initial hours of RV infection, justifying our previous observation of potent antirotaviral implications of Nrf2 agonists.
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Shimokawa T, Fukuta T, Inagi T, Kogure K. Protective effect of high-affinity liposomes encapsulating astaxanthin against corneal disorder in the in vivo rat dry eye disease model. J Clin Biochem Nutr 2020; 66:224-232. [PMID: 32523249 DOI: 10.3164/jcbn.19-102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 12/11/2019] [Indexed: 01/19/2023] Open
Abstract
Oxidative stress induced by decreases in tear volume and excessive tear evaporation is a key factor in dry eye disease (DED). Previously, we reported that desiccation stress induces reactive oxygen species generation and up-regulated expression of age-related markers such as p53, p21 and p16. We also showed that the antioxidant astaxanthin prepared as a liposomal formulation could suppress these phenomena in the in vitro DED model. In this study, we evaluated the protective effect of liposomes encapsulating astaxanthin against superficial punctate keratopathy (SPK) in the in vivo rat DED model. This model of DED was characterized by decreased tear volume and increased fluorescein score as an indicator of SPK as well as upregulated expression of age-related markers. Repeat-dose of liposomal astaxanthin prevented increases in the fluorescein score and up-regulation of age-related markers. Liposomes bearing a slight positive surface charge had superior effects and higher affinity compared to neutral liposomes. Furthermore, fluorescence intensities in rat corneal epithelium after administration of high-affinity liposomes labeled with fluorescent dye were higher than those for neutral liposomes. In conclusion, we developed the high-affinity liposomal formulation that can prevent DED and promote antioxidative effects of astaxanthin.
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Affiliation(s)
- Tatsuharu Shimokawa
- Department of Pharmaceutical Health Chemistry, Graduate School of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan.,Fuji Research Laboratories Pharmaceutical Division, Kowa Company, Ltd., 332-1, Ohnoshinden, Shizuoka 417-8650, Japan
| | - Tatsuya Fukuta
- Department of Pharmaceutical Health Chemistry, Graduate School of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan
| | - Toshio Inagi
- Department of Pharmaceutical Health Chemistry, Graduate School of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan
| | - Kentaro Kogure
- Department of Pharmaceutical Health Chemistry, Graduate School of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan
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Hou X, Xu H, Chen W, Zhang N, Zhao Z, Fang X, Zhang X, Chen H, Xu Y. Neuroprotective effect of dimethyl fumarate on cognitive impairment induced by ischemic stroke. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:375. [PMID: 32355819 PMCID: PMC7186746 DOI: 10.21037/atm.2020.02.10] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Oxidative damage may contribute to post-stroke cognitive impairment (PSCI), but the underlying mechanisms are not fully elucidated. Dimethyl fumarate (DMF) has been used as an antioxidant in multiple sclerosis and psoriasis patients. We hypothesized that redox state was associated with PSCI, and DMF might exert neuroprotective effect against PSCI via anti-oxidative actions. Methods To confirm this hypothesis, we first conducted a clinical study (NCT03519828) that enrolled patients diagnosed with acute ischemic stroke within 48 hours. Data were analyzed based on demographic characteristics, disease history, clinical data and redox state. Logistic regression was used to identify the factors associated with PSCI. Next, a middle cerebral artery occlusion (MCAO) rat model was used to explore the antioxidant capacity and neuroprotective effect of DMF. Furthermore, behavioural experiments, histology and immunostaining, and transmission electron microscopy were also performed. Results Higher baseline NIHSS score, lower GSH/GSSG and T-AOC levels were found in the PSCI patients. Better performance in Morris water maze and shuttle box testing, more regular arranged neurons and Nissl bodies, less TUNEL-positive cells and autophagosomes, lower expression of 4-HNE, and higher expression of GCLM and NQO1 were found in the (DMF + MCAO) rats compared with the MCAO rats. Conclusions These findings suggest that DMF may alleviate PSCI via neuroprotective actions, providing a new therapeutic strategy for PSCI.
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Affiliation(s)
- Xiaowen Hou
- School of Public Health, China Medical University, Shenyang 110122, China.,Department of Neurology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Haibin Xu
- Department of Neurology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Wanli Chen
- Department of Neurology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Nannan Zhang
- Department of Neurology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Ziai Zhao
- Department of Neurology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Xin Fang
- School of Public Health, China Medical University, Shenyang 110122, China
| | - Xing Zhang
- School of Public Health, China Medical University, Shenyang 110122, China
| | - Huisheng Chen
- Department of Neurology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Yuanyuan Xu
- School of Public Health, China Medical University, Shenyang 110122, China
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Zheng H, Liu Y, Xu D, Liu P, Yang X, Li B, Cao Z, Liu Y, Zheng X. Inhibition of Gap Junction-Mediated Intercellular Communication by Poly(I:C) in Cultured Human Corneal Fibroblasts. Curr Eye Res 2020; 45:1043-1050. [PMID: 32078434 DOI: 10.1080/02713683.2020.1716986] [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] [Indexed: 12/29/2022]
Abstract
PURPOSE/AIM Corneal stromal fibroblasts are connected to each other via gap junctions, which contribute to maintenance of corneal homeostasis. Viral infection of the corneal stroma can result in inflammation and scarring. The effects of polyinosinic-polycytidylic acid [poly(I:C)], an analog of viral double-stranded RNA, on gap junctional intercellular communication (GJIC) in cultured human corneal fibroblasts (HCFs) were examined. MATERIALS AND METHODS Cultured HCFs were exposed to poly(I:C) in the absence or presence of inhibitors of mitogen-activated protein kinase (MAPK) signaling or the antioxidant N-acetyl-L-cysteine (NAC). Expression of the gap junction protein connexin 43 (Cx43) was examined by immunoblot and immunofluorescence analyses. The level of Cx43 mRNA or microRNA-21 or -130a was determined by quantitative reverse transcription-polymerase chain reaction analysis. GJIC was measured with a dye coupling assay. The amount of malondialdehyde and the activity of superoxide dismutase (SOD) were measured with assay kits. RESULTS Exposure of HCFs to poly(I:C) resulted in down-regulation of Cx43 expression and GJIC activity as well as in up-regulation of microRNA-21 expression. Poly(I:C) increased the amount of malondialdehyde and reduced the activity of SOD in the cells, and these effects were prevented by NAC. The inhibitory effects of poly(I:C) on both Cx43 expression and GJIC activity were attenuated by NAC and by c-Jun NH2-terminal kinase (JNK) inhibitor II. CONCLUSIONS Poly(I:C) inhibited Cx43 expression and GJIC in cultured HCFs, possibly as a result of the associated up-regulation of microRNA-21. Poly(I:C) also increased oxidative stress in these cells, and such stress together with signaling by the MAPK JNK was implicated in the effects of poly(I:C) on Cx43 expression and GJIC activity. Down-regulation of GJIC activity among corneal fibroblasts by double-stranded RNA may thus contribute to the disruption of stromal homeostasis during viral infection of the cornea.
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Affiliation(s)
- Hui Zheng
- Department of Ophthalmology, Fifth Affiliated Hospital, Sun Yat-sen University , Zhuhai, PR China
| | - Ye Liu
- Department of Pathology, Fifth Affiliated Hospital, Sun Yat-sen University , Zhuhai, PR China
| | - Dan Xu
- Institute of Environmental Systems Biology, Environmental Science and Engineering College, Dalian Maritime University , Dalian, PR China
| | - Pingping Liu
- Department of Ophthalmology, Fifth Affiliated Hospital, Sun Yat-sen University , Zhuhai, PR China
| | - Xiuxia Yang
- Department of Ophthalmology, Fifth Affiliated Hospital, Sun Yat-sen University , Zhuhai, PR China
| | - Bing Li
- Department of Ophthalmology, Fifth Affiliated Hospital, Sun Yat-sen University , Zhuhai, PR China
| | - Zimu Cao
- Institute of Environmental Systems Biology, Environmental Science and Engineering College, Dalian Maritime University , Dalian, PR China
| | - Yang Liu
- Department of Ophthalmology, Fifth Affiliated Hospital, Sun Yat-sen University , Zhuhai, PR China
| | - Xiaoshuo Zheng
- Department of Ophthalmology, Fifth Affiliated Hospital, Sun Yat-sen University , Zhuhai, PR China
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Can Medicinal Plants and Bioactive Compounds Combat Lipid Peroxidation Product 4-HNE-Induced Deleterious Effects? Biomolecules 2020; 10:biom10010146. [PMID: 31963301 PMCID: PMC7022924 DOI: 10.3390/biom10010146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 12/27/2022] Open
Abstract
The toxic reactive aldehyde 4-hydroxynonenal (4-HNE) belongs to the advanced lipid peroxidation end products. Accumulation of 4-HNE and formation of 4-HNE adducts induced by redox imbalance participate in several cytotoxic processes, which contribute to the pathogenesis and progression of oxidative stress-related human disorders. Medicinal plants and bioactive natural compounds are suggested to be attractive sources of potential agents to mitigate oxidative stress, but little is known about the therapeutic potentials especially on combating 4-HNE-induced deleterious effects. Of note, some investigations clarify the attenuation of medicinal plants and bioactive compounds on 4-HNE-induced disturbances, but strong evidence is needed that these plants and compounds serve as potent agents in the prevention and treatment of disorders driven by 4-HNE. Therefore, this review highlights the pharmacological basis of these medicinal plants and bioactive compounds to combat 4-HNE-induced deleterious effects in oxidative stress-related disorders, such as neurotoxicity and neurological disorder, eye damage, cardiovascular injury, liver injury, and energy metabolism disorder. In addition, this review briefly discusses with special attention to the strategies for developing potential therapies by future applications of these medicinal plants and bioactive compounds, which will help biological and pharmacological scientists to explore the new vistas of medicinal plants in combating 4-HNE-induced deleterious effects.
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Selecting Appropriate Reference Genes for Quantitative Real-Time Polymerase Chain Reaction Studies in Isolated and Cultured Ocular Surface Epithelia. Sci Rep 2019; 9:19631. [PMID: 31873107 PMCID: PMC6927975 DOI: 10.1038/s41598-019-56054-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 12/05/2019] [Indexed: 12/20/2022] Open
Abstract
The introduction of tissue engineering has allowed scientists to push the boundaries and treat seriously damaged ocular surface epithelia. They have managed to do this through the development of biological substitutes that restore, maintain or improve tissue function. To ensure the generation of a therapeutically safe and effective graft, knowledge on the transcriptional profile of native and cultured ocular surface epithelia is of undeniable value. Gene expression studies are, however, only as reliable as their proper selection of internal reaction controls or reference genes. In this study, we determined the expression stability of a number of reference genes: 18s rRNA, ACTB, ATP5B, CyC1, EIF4A2, GAPDH, RPL13A, SDHA, TOP1, UBC, and YWHAZ in primary isolates as well as in ex vivo cultured ocular surface epithelia explants (day 0 and/or day 14). Expression stability of the reference genes was assessed with both the geNorm and NormFinder software that use a pairwise comparison and a model-based approach, respectively. Our results extend the general recommendation of using multiple reference genes for normalization purposes to our model systems and provide an overview of several references genes that are likely to be stable in similar culture protocols.
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Toxic activity of Prunus spinosa L. flower extract in hepatocarcinoma cells. Arh Hig Rada Toksikol 2019; 70:303-309. [PMID: 32623857 DOI: 10.2478/aiht-2019-70-3322] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 11/01/2019] [Indexed: 11/21/2022] Open
Abstract
Prunus spinosa L. (blackthorn) is used in traditional medicine as a remedy for various diseases. To establish its anticancer properties, we exposed human liver cancer cells (Hep G2) to a range of blackthorn flower extract concentrations (10-200 µg/mL) and determined cytotoxic activity with the neutral red and kenacid blue methods after 24, 48, and 72 h of incubation. Statistically significant inhibitory effects on Hep G2 cellular proliferation were observed at concentrations above 50 µg/mL (p<0.001-0.05). Cell viability was lower when determined with neutral red than kenacid blue method. In addition, we evaluated antioxidant/prooxidant effects of the blackthorn flower extract by measuring reactive oxygen species (ROS), and the results confirmed its prooxidant behaviour within the applied concentration range. Flow cytometry determined primarily necrotic and apoptotic cell death, which provides additional evidence of its cytotoxic effect on liver carcinoma.
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Park B, Jo K, Lee TG, Hyun SW, Kim JS, Kim CS. Polydatin Inhibits NLRP3 Inflammasome in Dry Eye Disease by Attenuating Oxidative Stress and Inhibiting the NF-κB Pathway. Nutrients 2019; 11:E2792. [PMID: 31731792 PMCID: PMC6893769 DOI: 10.3390/nu11112792] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/01/2019] [Accepted: 11/13/2019] [Indexed: 11/29/2022] Open
Abstract
Polydatin (also named pieceid, (E)-piceid, (E)-polydatin, trans-polydatin, or 3,5,4'-trihydroxystilbene-3-b-D-glucoside) is a monocrystalline compound isolated from the root and rhizome of Polygonum cuspidatum Sieb. et Zucc. (Polygonaceae). A previous study showed that polydatin has antioxidant and anti-inflammatory effects. However, the effect of polydatin in dry eye disease (DED) has not been elucidated. DED rat models were induced by exorbital lacrimal gland-excision. In vivo, the present study showed that the excision of lacrimal glands induced changes such as reduced tear fluid, severe corneal irregularity, damage, tear film break, and goblet cell loss as well as increased inflammation cytokine and NLRP3 expression in conjunctival tissue. However, these changes were restored by polydatin eye dropping. In vitro, polydatin inhibited hyperosmolar stress-induced inflammation through attenuation of the translocation of NF-κB to the nucleus and the mRNA expression of TNF-α, IL-6, IL-1β, and MMP9. In addition, the hyperosmolar stress-induced NLRP3 inflammasome pathway and ROS production were inhibited by polydatin. Our findings provided insight into the effect of polydatin as a candidate reagent for the treatment of DED.
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Affiliation(s)
- Bongkyun Park
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea; (B.P.); (T.G.L.)
| | - Kyuhyung Jo
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea; (K.J.); (S.-W.H.); (J.S.K.)
| | - Tae Gu Lee
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea; (B.P.); (T.G.L.)
| | - Soo-Wang Hyun
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea; (K.J.); (S.-W.H.); (J.S.K.)
- Medicinal Evaluation Team, Gyeonggi Bio-Center, Gyeonggido Business & Science Accelerator (GBSA), Suwon 16229, Gyeonggi-do, Korea
| | - Jin Sook Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea; (K.J.); (S.-W.H.); (J.S.K.)
| | - Chan-Sik Kim
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea; (B.P.); (T.G.L.)
- Korean Convergence Medicine, University of Science Technology (UST), Daejeon 34113, Korea
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Heidari M, Noorizadeh F, Wu K, Inomata T, Mashaghi A. Dry Eye Disease: Emerging Approaches to Disease Analysis and Therapy. J Clin Med 2019; 8:jcm8091439. [PMID: 31514344 PMCID: PMC6780511 DOI: 10.3390/jcm8091439] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/01/2019] [Accepted: 09/06/2019] [Indexed: 12/11/2022] Open
Abstract
Dry eye disease (DED) is among the most common ocular disorders affecting tens of millions of individuals worldwide; however, the condition remains incompletely understood and treated. Valuable insights have emerged from multidisciplinary approaches, including immunometabolic analyses, microbiome analyses, and bioengineering. Furthermore, we have seen new developments in clinical assessment approaches and treatment strategies in the recent past. Here, we review the emerging frontiers in the pathobiology and clinical management of DED.
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Affiliation(s)
- Mostafa Heidari
- Basir Eye Health Research Center, Tehran 1418643561, Iran.
- Farabi Eye Hospital, Department of Ophthalmology and Eye Research Center, Tehran University of Medical Sciences, Tehran 133661635, Iran.
| | | | - Kevin Wu
- Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, Ophthalmic Consultation Service, New York, NY 10029, USA
- New York Eye and Ear Infirmary of Mount Sinai, New York, NY 10003, USA
| | - Takenori Inomata
- Department of Ophthalmology, Juntendo University Faculty of Medicine, Tokyo 1130033, Japan.
- Department of Strategic Operating Room Management and Improvement, Juntendo University Faculty of Medicine, Tokyo 1130033, Japan.
| | - Alireza Mashaghi
- Systems Biomedicine and Pharmacology Division, Leiden Academic Centre for Drug Research, Leiden University, 2333CC Leiden, The Netherlands.
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.
- Department of Ophthalmology, Shanghai Medical College, Fudan University, Shanghai 200000, China.
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Sedlak L, Zych M, Wojnar W, Wyględowska-Promieńska D. Effect of Topical Prostaglandin F2α Analogs on Selected Oxidative Stress Parameters in the Tear Film. MEDICINA (KAUNAS, LITHUANIA) 2019; 55:medicina55070366. [PMID: 31336766 PMCID: PMC6681209 DOI: 10.3390/medicina55070366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/05/2019] [Accepted: 07/09/2019] [Indexed: 01/07/2023]
Abstract
Background and Objectives: Topically administered antiglaucoma medications, especially those containing benzalkonium chloride (BAC), may cause local adverse effects and compromise ocular surface. The aim of the study was to assess the effect of topical prostaglandin F2α analogs (PGAs): preservative-free latanoprost, BAC-preserved latanoprost, preservative-free tafluprost, and BAC-preserved bimatoprost, on selected oxidative stress parameters in the tear film. Materials and Methods: The patients were divided into five groups: group C (n = 25) control group—subjects who did not use topical antiglaucoma medications, group L (n = 22)—patients using topical preservative-free latanoprost, group L+BAC (n = 25)—patients using topical BAC-preserved latanoprost, group T (n = 19)—patients using topical preservative-free tafluprost, and group B+BAC (n = 17)—patients using topical BAC-preserved bimatoprost. The oxidative stress markers in the tear film samples were evaluated: total protein (TP) concentration, advanced oxidation protein products (AOPP) content, total sulfhydryl (-SH) groups content, the activity of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx), as well as Total Oxidant Status (TOS), Total Antioxidant Response (TAR), and Oxidative Stress Index (OSI). Results: The TP concentrations in the groups L, L+BAC, and B+BAC were statistically significantly higher in comparison with group C. The SOD and CAT activities in the groups L+BAC and B+BAC were statistically significantly higher when compared to group C. As compared to group C, AOPP and TOS were statistically significantly higher in all the study groups. OSI was found to be statistically significantly higher in the groups L+BAC, T, and B+BAC in comparison with group C. Conclusion: Use of topical PGAs by the patients with ocular hypertension or primary open-angle glaucoma is associated with increased oxidative stress in the tear film which is additionally exacerbated by the presence of BAC in the formulation.
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Affiliation(s)
- Lech Sedlak
- Department of Ophthalmology, School of Medicine in Katowice, Medical University of Silesia in Katowice, 40-514 Katowice, Poland.
- Department of Ophthalmology, Kornel Gibiński University Clinical Center, Medical University of Silesia in Katowice, 40-514 Katowice, Poland.
| | - Maria Zych
- Department of Pharmacognosy and Phytochemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia in Katowice, 41-200 Sosnowiec, Poland
| | - Weronika Wojnar
- Department of Pharmacognosy and Phytochemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia in Katowice, 41-200 Sosnowiec, Poland
| | - Dorota Wyględowska-Promieńska
- Department of Ophthalmology, School of Medicine in Katowice, Medical University of Silesia in Katowice, 40-514 Katowice, Poland
- Department of Ophthalmology, Kornel Gibiński University Clinical Center, Medical University of Silesia in Katowice, 40-514 Katowice, Poland
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Kim D, Maharjan P, Jin M, Park T, Maharjan A, Amatya R, Yang J, Min KA, Shin MC. Potential Albumin-Based Antioxidant Nanoformulations for Ocular Protection against Oxidative Stress. Pharmaceutics 2019; 11:pharmaceutics11070297. [PMID: 31248013 PMCID: PMC6680573 DOI: 10.3390/pharmaceutics11070297] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/22/2019] [Accepted: 06/24/2019] [Indexed: 12/16/2022] Open
Abstract
Amongst various drug administration methods, ophthalmic drug delivery has been a useful way for the treatment of eye-related diseases. However, therapeutic efficacy of ocular therapy for anterior or posterior eye segments through topical administration is considerably challenged by the number of anatomical and physiological barriers in the eyes affecting ocular bioavailability. In this respect, advanced biocompatible nanoformulations make it possible to improve drug delivery to the target sites and enhance ocular bioavailability of ophthalmic medicines. Various ocular diseases have been reported to be related to oxidative stresses in tissues, and polyphenolic compounds have been known for their antioxidant activities in various tissues, including the eyes. Despite drug efficacy, poor water solubility and intrinsic color of the compounds limit the drug’s inclusion into the development of ocular medicine. In the present study, we investigated the antioxidant protectant efficacy of rosmarinic or ursolic acid in the retinal epithelial cells, as compared to those of curcumin, by forming nanospheres with bovine serum albumin. Our results demonstrate that antioxidant-containing nanoformulations provide a significantly higher drug solubility and decreased ROS (reactive oxygen species) production in the retinal epithelial cells. Finally, we also found that albumin-based nanoformulations could improve bioavailability and increase antioxidant activity of rosmarinic or ursolic acid in the retina to be applied as efficient ocular protectant.
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Affiliation(s)
- Daseul Kim
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam 50834, Korea
| | - Pooja Maharjan
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam 50834, Korea
| | - Minki Jin
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam 50834, Korea
| | - Taehoon Park
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, 501 Jinju Daero, Jinju, Gyeongnam 52828, Korea
| | - Anjila Maharjan
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam 50834, Korea
| | - Reeju Amatya
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, 501 Jinju Daero, Jinju, Gyeongnam 52828, Korea
| | - JaeWook Yang
- Department of Ophthalmology, College of Medicine, Inje University, 75 Bokjiro, Busanjin-gu, Busan 47392, Korea
- T2B infrastructure center for ocular diseases, Inje University Busan Paik Hospital, 75 Bokjiro, Busanjin-gu, Busan 47392, Korea
| | - Kyoung Ah Min
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam 50834, Korea.
| | - Meong Cheol Shin
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, 501 Jinju Daero, Jinju, Gyeongnam 52828, Korea.
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Maharjan P, Jin M, Kim D, Yang J, Maharjan A, Shin MC, Cho KH, Kim MS, Min KA. Evaluation of epithelial transport and oxidative stress protection of nanoengineered curcumin derivative-cyclodextrin formulation for ocular delivery. Arch Pharm Res 2019; 42:909-925. [PMID: 31030375 DOI: 10.1007/s12272-019-01154-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 04/15/2019] [Indexed: 10/26/2022]
Abstract
Ocular drug delivery has been a well-known route for the drug administration for the treatment of ocular diseases. However, numerous anatomical and physiological barriers prevailing in the eye itself create considerable challenges for achieving the necessitated therapeutic efficacy along with ocular bioavailability. However, recent advances in nanoengineered strategies hold definite promises in terms of devising improved ophthalmic medicines for the effective drug delivery to target the sites with enhanced ocular bioavailability. Curcumin, a hydrophobic polyphenol yellow colored compound, and its metabolic reduced product, tetrahydrocurcumin (THC), have been known for their beneficial pharmacological functions, such as anti-inflammatory or anti-oxidant activities at various tissue sites. However, the low aqueous solubility of these compounds results in their poor bioavailability, thereby limiting their widespread application. Therefore, in the present study, we investigated the changes in drug solubility by forming inclusion complexes with different derivatives of hydroxypropyl (HP)-cyclodextrins (CD). To this end, the spray drying technique was used for nanoengineering curcumin or THC-loaded formulations to improve the stability of formulations during the storage. The formulations were characterized in terms of physicochemical properties and cellular permeability. The results demonstrated that the encapsulation of curcumin (or THC) into the HP-CDs significantly increased the drug solubility and enhanced the corneal and retinal epithelial permeability. Curcumin or THC complexes in HP-CDs with improved bioavailability also induced anti-oxidant activity (SOD1, CAT1, and HMOX1) in higher levels in the ocular epithelial cells and showed oxidative protection effects in rabbit cornea tissues that will boost up their application in ocular medicine.
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Affiliation(s)
- Pooja Maharjan
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam, 50834, Republic of Korea
| | - Minki Jin
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam, 50834, Republic of Korea
| | - Daseul Kim
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam, 50834, Republic of Korea
| | - JaeWook Yang
- Department of Ophthalmology, College of Medicine, Inje University, 75 Bokjiro, Busanjin-gu, Busan, 47392, Republic of Korea.,T2B Infrastructure Center for Ocular Diseases, Inje University Busan Paik Hospital, 75 Bokjiro, Busanjin-gu, Busan, 47392, Republic of Korea
| | - Anjila Maharjan
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam, 50834, Republic of Korea
| | - Meong Cheol Shin
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, 501 Jinju Daero, Jinju, Gyeongnam, 52828, Republic of Korea
| | - Kwan Hyung Cho
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam, 50834, Republic of Korea
| | - Man Su Kim
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam, 50834, Republic of Korea
| | - Kyoung Ah Min
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Injero, Gimhae, Gyeongnam, 50834, Republic of Korea.
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Li YJ, Luo LJ, Harroun SG, Wei SC, Unnikrishnan B, Chang HT, Huang YF, Lai JY, Huang CC. Synergistically dual-functional nano eye-drops for simultaneous anti-inflammatory and anti-oxidative treatment of dry eye disease. NANOSCALE 2019; 11:5580-5594. [PMID: 30860532 DOI: 10.1039/c9nr00376b] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We have developed a rapid and straightforward topical treatment method for dry eye disease (DED) using poly(catechin) capped-gold nanoparticles (Au@Poly-CH NPs) carrying amfenac [AF; a nonsteroidal anti-inflammatory drug (NSAID)] through effective attenuation of ocular surface tissue damage in dry eyes. A dual-targeted strategy based on ocular therapeutics was adopted to simultaneously block the cyclooxygenase enzymes-induced inflammation and reactive oxygen species (ROS)-induced oxidative stress, the primary two causes of DED. The self-assembled core-shell Au@Poly-CH NPs synthesized via a simple reaction between tetrachloroaurate(iii) and catechin possess a poly(catechin) shell (∼20 nm) on the surface of each Au NP (∼60 nm). The anti-oxidant and anti-inflammatory properties of AF/Au@Poly-CH NPs were evaluated by DCFH-DA and prostaglandin E2/VEGF assays, respectively. Our results demonstrate that Au@Poly-CH NPs not only act as an anti-oxidant to suppress ROS-mediated processes, but also serve as a drug carrier of AF for a synergistic effect on anti-inflammation. In vivo biocompatibility studies show good tolerability of AF/Au@Poly-CH NPs for potential use in the treatment of ocular surface pathologies. The dual-targeted therapeutic effects of AF/Au@Poly-CH NPs lead to rapid recovery from DED in a rabbit model. Au@Poly-CH NPs loaded with NSAIDs is a promising multifunctional nanocomposite for treating various inflammation- and oxidative stress-related diseases.
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Affiliation(s)
- Yu-Jia Li
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan, 33302, Taiwan.
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Zheng Q, Tan Q, Ren Y, Reinach PS, Li L, Ge C, Qu J, Chen W. Hyperosmotic Stress-Induced TRPM2 Channel Activation Stimulates NLRP3 Inflammasome Activity in Primary Human Corneal Epithelial Cells. Invest Ophthalmol Vis Sci 2019; 59:3259-3268. [PMID: 29971445 DOI: 10.1167/iovs.18-23965] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose The purpose of this study was to determine whether either a hyperosmotic or oxidative stress induces NLRP3 inflammasome activation and increases in bioactive IL-1β secretion through transient receptor potential melastatin 2 (TRPM2) activation in primary human corneal epithelial cells (PHCECs). Methods Real-time PCR, Western blots, and immunofluorescent staining were used to evaluate TRPM2 and NLRP3, ASC, caspase-1, and IL-1β mRNA and protein expression levels, respectively. A CCK-8 assay evaluated cell viability. Hyperosmotic 500 mOsm and oxidative 0.5 mM H2O2 stresses were imposed. TRPM2 expression was inhibited with a TRPM2 inhibitor, 20 μM N-(p-amylcinnamoyl) anthranilic acid (ACA), or TRPM2 siRNA knockdown. Results In the hypertonic medium, TRPM2, NLRP3, ASC, caspase-1, and IL-1β gene and protein expression levels rose after 4 hours (P ≤ 0.043), whereas ACA preincubation suppressed these rises (P ≤ 0.044). Similarly, H2O2 upregulated TRPM2 protein expression by 80%, and induced both NLRP3 inflammasome activation and increased bioactive IL-1β secretion (P ≤ 0.036), whereas ACA pretreatment suppressed these effects (P ≤ 0.029). TRPM2 siRNA transfection reduced TRPM2 gene expression by 70% (P = 0.018) in this hyperosmotic medium and inhibited the increases in NLRP3, caspase-1, and IL-1β gene (P ≤ 0.028) and protein expression (P ≤ 0.037). Conclusions TRPM2 activation by either a hyperosmotic or oxidative stress contributes to mediating increases in NLRP3 inflammasome activity and bioactive IL-1β expression because inhibiting TRPM2 activation or its expression blunted both of these responses in PHCECs. This association points to the possibility that TRPM2 is a viable target to suppress hyperosmotic-induced corneal epithelial inflammation.
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Affiliation(s)
- Qinxiang Zheng
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China
| | - Qiufan Tan
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China.,Yiwu Maternal and Child Health Hospital, Jinhua, Zhejiang, China
| | - Yueping Ren
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China
| | - Peter S Reinach
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China
| | - Ling Li
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China
| | - Chaoxiang Ge
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China
| | - Jia Qu
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China
| | - Wei Chen
- School of Ophthalmology and Optometry, Wenzhou Medical University, Zhejiang, China
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Fu X, Feng Y, Shao B, Zhang Y. Activation of the ERK/Creb/Bcl‑2 pathway protects periodontal ligament stem cells against hydrogen peroxide‑induced oxidative stress. Mol Med Rep 2019; 19:3649-3657. [PMID: 30896883 PMCID: PMC6472112 DOI: 10.3892/mmr.2019.10027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 02/22/2019] [Indexed: 12/13/2022] Open
Abstract
Periodontal ligament stem cells (PDLSCs) are promising stem cells sources for regenerative medicine, particularly clinical periodontal ligament repair. It is critical to maintain high quality and a large quantity of PDLSCs for clinical usage. However, how PDLSCs respond to environmental stimuli, including reactive oxygen species (ROS), is poorly understood. The aim of the present study was to investigate how PDLSCs react to oxidative stress and the underlying mechanisms. Hydrogen peroxide-induced oxidative stress was used to mimic a ROS increase in rat PDLSCs. The expression levels of Creb were detected under oxidative stress to examine the role that Creb serves in PDLSCs under oxidative stress. The present results demonstrated that the expression of Creb was reduced in a dose-dependent manner in response to the H2O2 stimulus. Overexpressing Creb significantly reduced the ROS levels and protein expression levels of apoptotic genes in PDLSCs. The phosphorylation of the ERK pathway is indispensable in the activation of Creb-induced protection. Our results revealed a protective role of Creb in ROS-induced apoptosis, and validated the ERK/Creb/apoptosis regulator Bcl-2 pathway works as an anti-apoptotic signaling in PDLSCs. These findings will facilitate the in vitro culturing of PDLSCs for clinical usage and promote stem cell based therapy for periodontal tissue regeneration.
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Affiliation(s)
- Xiaohui Fu
- Department of General Dentistry, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
| | - Yimiao Feng
- Department of Orthodontics, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
| | - Bingyi Shao
- Department of Operative Dentistry and Endodontics, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 400015, P.R. China
| | - Yanzhen Zhang
- Department of General Dentistry, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
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68
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Safonova TN, Gladkova OV, Boev VI. [Oxidative stress correction in the treatment of severe keratoconjunctivitis sicca in patients with Sjorgen's syndrome]. Vestn Oftalmol 2019; 135:59-66. [PMID: 30830076 DOI: 10.17116/oftalma201913501159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
PURPOSE To evaluate the antioxidative effect of artificial tears in the treatment of keratoconjunctivitis sicca (KCS). MATERIAL AND METHODS The study included 43 patients (60 eyes) with severe KCS: 38 women (50 eyes) and 5 men (10 eyes) aged from 27 to 76 years (in average 52 years). Patients were randomly divided into 2 groups; all patients used therapeutic silicone hydrogel soft contact lens (SCL) and instillations of 0.05% Cyclosporin A (CyA) 2 times a day. Patients of the first group (22 people, 30 eyes) used 0.15% hyaluronic acid. In the second group, patients (21 people, 30 eyes) used a tear substitute with similar surface-active component, but with antioxidant properties. The results of the treatment were evaluated using basic and additional research methods at 1, 3, 6 and 12 months. RESULTS Corneal epithelialization was achieved after 1 month of conservative treatment in all patients who wore SCLs and were treated with instillations of 0.05% CyA and artificial tears. Then the lenses were removed and the patients were switched to instillations of CyA and artificial tears. Comparative analysis of the results showed that higher functional indicators were achieved in the second group, where patients used Artelac Rebalance drops with antioxidant properties. CONCLUSION Improvement of clinical and functional parameters in the treatment of severe forms of KCS was achieved by direct action on both links of pathogenesis with minimal amounts of the drugs and the frequency of their use. Subsequent supportive therapy contributed to stabilization of the results and further increase of the functional parameters.
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Affiliation(s)
- T N Safonova
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - O V Gladkova
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - V I Boev
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
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de Souza RG, de Paiva CS, Alves MR. Age-related Autoimmune Changes in Lacrimal Glands. Immune Netw 2019; 19:e3. [PMID: 30838158 PMCID: PMC6399097 DOI: 10.4110/in.2019.19.e3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/10/2019] [Accepted: 02/11/2019] [Indexed: 02/08/2023] Open
Abstract
Aging is a complex process associated with dysregulation of the immune system and low levels of inflammation, often associated with the onset of many pathologies. The lacrimal gland (LG) plays a vital role in the maintenance of ocular physiology and changes related to aging directly affect eye diseases. The dysregulation of the immune system in aging leads to quantitative and qualitative changes in antibodies and cytokines. While there is a gradual decline of the immune system, there is an increase in autoimmunity, with a reciprocal pathway between low levels of inflammation and aging mechanisms. Elderly C57BL/6J mice spontaneously show LGs infiltration that is characterized by Th1 but not Th17 cells. The aging of the LG is related to functional alterations, reduced innervation and decreased secretory activities. Lymphocytic infiltration, destruction, and atrophy of glandular parenchyma, ductal dilatation, and secretion of inflammatory mediators modify the volume and composition of tears. Oxidative stress, the capacity to metabolize and eliminate toxic substances decreased in aging, is also associated with the reduction of LG functionality and the pathogenesis of autoimmune diseases. Although further studies are required for a better understanding of autoimmunity and aging of the LG, we described anatomic and immunology aspects that have been described so far.
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Affiliation(s)
- Rodrigo G de Souza
- University of Sao Paulo, Sao Paulo, Brazil.,Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA
| | - Cintia S de Paiva
- University of Sao Paulo, Sao Paulo, Brazil.,Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA
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Žiniauskaitė A, Ragauskas S, Ghosh AK, Thapa R, Roessler AE, Koulen P, Kalesnykas G, Hakkarainen JJ, Kaja S. Manganese(III) tetrakis(1-methyl-4-pyridyl) porphyrin, a superoxide dismutase mimetic, reduces disease severity in in vitro and in vivo models for dry-eye disease. Ocul Surf 2019; 17:257-264. [PMID: 30807830 DOI: 10.1016/j.jtos.2019.02.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 02/14/2019] [Accepted: 02/20/2019] [Indexed: 12/15/2022]
Abstract
PURPOSE To determine the efficacy of the superoxide dismutase mimetic, manganese(III) tetrakis(1-methyl-4-pyridyl) porphyrin (Mn-TM-2-PyP), in vitro in human corneal epithelial (HCE-T) cells and in vivo in a preclinical mouse model for dry-eye disease (DED). METHODS In vitro, HCE-T cultures were exposed either to tert-butylhydroperoxide (tBHP) to generate oxidative stress or to hyperosmolar conditions modeling cellular stress during DED. Cells were pre-treated with Mn-TM-2-PyP or vehicle. Mn-TM-2-PyP permeability across stratified HCE-T cells was assayed. In vivo, Mn-TM-2-PyP (0.1% w/v in saline) was delivered topically as eye drops in a desiccating stress/scopolamine model for DED. Preclinical efficacy was compared to untreated, vehicle- and ophthalmic cyclosporine emulsion-treated mice. RESULTS Mn-TM-2-PyP protected HCE-T cells in a dose-dependent manner against tBHP-induced oxidative stress as determined by calculating the IC50 for tBHP in the resazurin, MTT and lactate dehydrogenase release cell viability assays. Mn-TM-2-PyP did not protect HCE-T cells from hyperosmolar insult. Its permeability coefficient across a barrier of HCE-T cells was 1.1 ± 0.05 × 10-6 cm/s and the mass balance was 62 ± 0.6%. In vivo, topical dosing with Mn-TM-2-PyP resulted in a statistically significant reduction of corneal fluorescein staining, similar to ophthalmic cyclosporine emulsion. Furthermore, Mn-TM-2-PyP significantly reduced leukocyte infiltration into lacrimal glands and prevented degeneration of parenchymal tissue. No protective effect against loss of conjunctival goblet cells was observed. Notably, Mn-TM-2-PyP did not produce ocular toxicity when administered topically. DISCUSSION Our data suggest that Mn-TM-2-PyP, a prototypic synthetic metalloporphyrin compound with potent catalytic antioxidant activity, can improve signs of DED in vivo by reducing oxidative stress in corneal epithelial cells.
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Affiliation(s)
| | | | - Anita K Ghosh
- Graduate Program in Neuroscience, Health Sciences Division, Loyola University Chicago, Maywood, IL, USA; Departments of Ophthalmology and Molecular Pharmacology & Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, IL, USA
| | | | | | - Peter Koulen
- Vision Research Center, Departments of Ophthalmology and Biomedical Sciences, School of Medicine, University of Missouri - Kansas City, Kansas City, MO, USA
| | | | | | - Simon Kaja
- Experimentica Ltd., Kuopio, Finland; Graduate Program in Neuroscience, Health Sciences Division, Loyola University Chicago, Maywood, IL, USA; Departments of Ophthalmology and Molecular Pharmacology & Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, IL, USA; K&P Scientific LLC, Oak Park, IL, USA.
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Wei Y, Troger A, Spahiu V, Perekhvatova N, Skulachev M, Petrov A, Chernyak B, Asbell P. The Role of SKQ1 (Visomitin) in Inflammation and Wound Healing of the Ocular Surface. Ophthalmol Ther 2018; 8:63-73. [PMID: 30565203 PMCID: PMC6393248 DOI: 10.1007/s40123-018-0158-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Indexed: 11/25/2022] Open
Abstract
Introduction SkQ1 (Visomitin) is a novel mitochondrial-targeted antioxidant that holds promise in the treatment of inflammation associated with ocular surface diseases such as dry eye disease (DED) and corneal wounds. However, the specific role of SkQ1 in ocular surface epithelial tissue has yet to be explicated. The goal of this study is to identify roles of SkQ1 in conjunctival inflammation and corneal wound healing. Methods To determine the role of SkQ1 in inflammation, human conjunctival epithelial (HCjE) cell cultures were sensitized with pro-inflammatory cytokine tumor necrosis factor alpha (TNF-α) and interleukin 1 beta (IL-1β) followed by treatments with SkQ1. The production of inflammatory biomarker prostaglandin E2 (PGE2) and cell viability were quantitatively evaluated. To determine the role of SkQ1 in wound healing, human corneal limbus epithelial (HCLE) cell cultures were streaked to create wounds. The wound closure times, ability to support single HCLE cell proliferation and changes of cell migration in the presence of SB203580, an inhibitor of p38 mitogen-activated protein kinase (MAPK), were further compared. Results The HCjE and HCLE cultures showed no apparent cytotoxicity to SkQ1 in concentrations up to 250 nM (HCjE) or 2500 nM (HCLE). The HCLE cultures showed no toxicity to SkQ1 at all the SkQ1 concentrations tested. SkQ1 significantly suppressed PGE2 production of HCjE at concentrations < 300 nM (24 h) and 50 nM (48 h), apparently being SkQ1 dose and treatment time dependent. The wound closure rates were increased by 4% in 4 h and by 9% after 8–12 h in the presence of 50 nM SkQ1. Furthermore, as little as 25 nM of SkQ1 significantly stimulated HCLE single-cell proliferation. Lastly, the SkQ1-stimulated wound healing was completely abolished by SB203580. Conclusion Results of the current study demonstrate that SkQ1 exhibits an anti-inflammatory role and can be safely applied to ocular surface epithelium up to a concentration of 300 nM (181 ng/ml) for 24 h. SkQ1 also significantly enhances corneal epithelial wound healing, likely through enhancement of cell proliferation and migration. The data provide solid support for SkQ1 as a promising new therapeutic strategy for treatment of conjunctival inflammation as well as corneal wounds. Funding This study was sponsored by Mitotech SA Pharmaceuticals. Electronic supplementary material The online version of this article (10.1007/s40123-018-0158-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yi Wei
- The Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Andrew Troger
- The Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Viola Spahiu
- The Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | | | | | - Boris Chernyak
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, Russia
| | - Penny Asbell
- The Icahn School of Medicine at Mount Sinai, New York, NY, USA
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72
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Brzheskiy VV, Popov VY, Kalinina NM, Brzheskaya IV. [Prevention and treatment of degenerative changes in ocular surface epithelium in patients with dry eye syndrome]. Vestn Oftalmol 2018; 134:126-134. [PMID: 30499550 DOI: 10.17116/oftalma2018134051126] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In current understanding of the pathogenesis of xerotic changes of the ocular surface in patients with dry eye syndrome (DES), great importance is given to hyperosmolarity of the tear film, inflammatory process and oxidative stress. By now, no convincing data has been obtained on whether the oxidative stress is primary in relation to the inflammatory process in the ocular surface tissues, or if it is a complication. Furthermore, in the complex treatment of patients with DES, antioxidant therapy has so far received little attention. This problem can be solved with the 'artificial tears' preparation containing cyanocobalamin (vitamin B12), which antioxidant, anti-inflammatory and clinical effectiveness has been convincingly proved in a number of experimental and clinical studies of recent years. Improving the methods of vital diagnostics of xerosis of the ocular surface also enables detection of subclinical changes in epithelium of the cornea and conjunctiva, thus allowing timely prescription of metabolic therapy. One of the promising directions of such treatment is the use of 5% dexpanthenol, which stimulates the processes of reparative regeneration and possesses an anti-inflammatory effect.
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Affiliation(s)
- V V Brzheskiy
- Saint Petersburg State Pediatric Medical University, 2 Litovskaya St., Saint Petersburg, Russian Federation, 194100
| | - V Yu Popov
- Saint Petersburg State Pediatric Medical University, 2 Litovskaya St., Saint Petersburg, Russian Federation, 194100; Mariinsky City Hospital, 56 Liteinyi Prospect, Saint Petersburg, Russian Federation, 194104
| | - N M Kalinina
- Nikiforov All-Russian Center of Emergency and Radiation Medicine, the Emergencies Ministry of Russia, 4/2 Akademika Lebedeva St., Saint Petersburg, Russian Federation, 194044
| | - I V Brzheskaya
- Saint Petersburg State Pediatric Medical University, 2 Litovskaya St., Saint Petersburg, Russian Federation, 194100; Mariinsky City Hospital, 56 Liteinyi Prospect, Saint Petersburg, Russian Federation, 194104
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Shimokawa T, Yoshida M, Fukuta T, Tanaka T, Inagi T, Kogure K. Efficacy of high-affinity liposomal astaxanthin on up-regulation of age-related markers induced by oxidative stress in human corneal epithelial cells. J Clin Biochem Nutr 2018; 64:27-35. [PMID: 30705509 PMCID: PMC6348414 DOI: 10.3164/jcbn.18-27] [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: 02/21/2018] [Accepted: 03/28/2018] [Indexed: 12/13/2022] Open
Abstract
Decreases in tear volume, unstable tear films and excessive tear evaporation are known to cause desiccation and hyperosmolar stress. These, in turn, induce oxidative stress that is thought to cause dry eye, which is also considered to be age-related disease. We hypothesized that oxidative stress induces up-regulation of age-related markers, and that the antioxidant astaxanthin prepared as a liposomal formulation may be a candidate for the treatment of dry eye. Herein, we examined age-related markers in an in vitro dry eye model, and evaluated the efficacy of high-affinity liposomes containing astaxanthin. The in vitro dry eye model showed desiccation time-dependent increases in reactive oxygen species. We confirmed the up-regulation of p53, p21 and p16 as a function of desiccation time. Pretreatment with both neutral and slightly-positively-charged astaxanthin liposomal formulations showed significant suppression of up-regulation of all markers, with the positively-charged liposomes exhibiting the greatest efficacy. Furthermore, positively-charged liposomes labeled with fluorescent dyes demonstrated much higher affinity to normal human corneal epithelial cells (HCECs) than neutral liposomes. Taken together, we confirmed the up-regulation of age-related markers, especially p16, in an in vitro dry eye model, and demonstrated the potential of high-affinity liposomal astaxanthin for the treatment of dry eye.
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Affiliation(s)
- Tatsuharu Shimokawa
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan.,Fuji Research Laboratories Pharmaceutical Division, Kowa Company, Ltd., 332-1 Ohnoshinden, Shizuoka 417-8650, Japan
| | - Mai Yoshida
- Kyoto Pharmaceutical University, Misasagi-Nakauchi-cho 5, Yamashina-ku, Kyoto 607-8414, Japan
| | - Tatsuya Fukuta
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan
| | - Tamotsu Tanaka
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan
| | - Toshio Inagi
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan
| | - Kentaro Kogure
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University Graduate School, 1 Shomachi, Tokushima 770-8505, Japan
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Khan AU, Akram M, Daniyal M, Zainab R. Awareness and current knowledge of Parkinson’s disease: a neurodegenerative disorder. Int J Neurosci 2018; 129:55-93. [DOI: 10.1080/00207454.2018.1486837] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Asmat Ullah Khan
- Department of Pharmacology, Laboratory of Neuroanatomy and Neuropsychobiology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), São Paulo, Brazil
- Department of Eastern Medicine and Surgery, School of Medical and Health Sciences, The University of Poonch Rawalakot, Rawalakot, Pakistan
| | - Muhammad Akram
- Department of Eastern Medicine and Surgery, Directorate of Medical Sciences, Old Campus, Allama Iqbal Road, Government College University, Faisalabad, Pakistan
| | - Muhammad Daniyal
- TCM and Ethnomedicine Innovation and Development Laboratory, School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Hunan University, Changsha, China
| | - Rida Zainab
- Department of Eastern Medicine and Surgery, Directorate of Medical Sciences, Old Campus, Allama Iqbal Road, Government College University, Faisalabad, Pakistan
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Munakata S, Ishimori K, Kitamura N, Ishikawa S, Takanami Y, Ito S. Oxidative stress responses in human bronchial epithelial cells exposed to cigarette smoke and vapor from tobacco- and nicotine-containing products. Regul Toxicol Pharmacol 2018; 99:122-128. [PMID: 30227175 DOI: 10.1016/j.yrtph.2018.09.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 08/13/2018] [Accepted: 09/12/2018] [Indexed: 12/15/2022]
Abstract
The use of novel tobacco- and nicotine-containing vapor products that do not combust tobacco leaves is on the rise worldwide. The emissions of these products typically contain lower numbers and levels of potentially harmful chemicals compared with conventional cigarette smoke. These vapor products may therefore elicit fewer adverse biological effects. We compared the effects of emissions from different types of such products, i.e., our proprietary novel tobacco vapor product (NTV), a commercially available heat-not-burn tobacco product (HnB), and e-cigarette (E-CIG), and a combustible cigarette in a human bronchial epithelial cell line. The aqueous extract (AqE) of the test product was prepared by bubbling the produced aerosol into medium. Cells were exposed to the AqEs of test products, and then glutathione oxidation, Nrf2 activation, and secretion of IL-8 and GM-CSF were examined. We found that all endpoints were similarly perturbed by exposure to each AqE, but the effective dose ranges were different between cigarette smoke and the tobacco- and nicotine-containing vapors. These results demonstrate that the employed assays detect differences between product exposures, and thus may be useful to understand the relative potential biological effects of tobacco- and nicotine-containing products.
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Affiliation(s)
- Satoru Munakata
- Scientific Product Assessment Center, R&D Group, Japan Tobacco Inc., 6-2 Umegaoka, Aoba-ku, Yokohama, Kanagawa, 227-8512, Japan.
| | - Kanae Ishimori
- Scientific Product Assessment Center, R&D Group, Japan Tobacco Inc., 6-2 Umegaoka, Aoba-ku, Yokohama, Kanagawa, 227-8512, Japan.
| | - Nobumasa Kitamura
- Scientific Product Assessment Center, R&D Group, Japan Tobacco Inc., 6-2 Umegaoka, Aoba-ku, Yokohama, Kanagawa, 227-8512, Japan.
| | - Shinkichi Ishikawa
- Scientific Product Assessment Center, R&D Group, Japan Tobacco Inc., 6-2 Umegaoka, Aoba-ku, Yokohama, Kanagawa, 227-8512, Japan.
| | - Yuichiro Takanami
- Scientific Product Assessment Center, R&D Group, Japan Tobacco Inc., 6-2 Umegaoka, Aoba-ku, Yokohama, Kanagawa, 227-8512, Japan.
| | - Shigeaki Ito
- Scientific Product Assessment Center, R&D Group, Japan Tobacco Inc., 6-2 Umegaoka, Aoba-ku, Yokohama, Kanagawa, 227-8512, Japan.
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76
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Yang L, Zhang S, Duan H, Dong M, Hu X, Zhang Z, Wang Y, Zhang X, Shi W, Zhou Q. Different Effects of Pro-Inflammatory Factors and Hyperosmotic Stress on Corneal Epithelial Stem/Progenitor Cells and Wound Healing in Mice. Stem Cells Transl Med 2018; 8:46-57. [PMID: 30302939 PMCID: PMC6312447 DOI: 10.1002/sctm.18-0005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 07/19/2018] [Indexed: 12/12/2022] Open
Abstract
Chronic inflammation and severe dry eye are two important adverse factors for the successful transplant of cultured limbal stem cells. The aim of this study was to investigate the effects of inflammation and hyperosmotic stress (a key pathological factor in dry eye) on corneal epithelial stem cells (CESCs) and corneal epithelial wound healing. We observed that the CESCs exhibited significant morphological changes when treated with interleukin‐1 beta (IL‐1β), tumor necrosis factor alpha (TNF‐α), or hyperosmotic stress. Colony‐forming efficiency or colony‐forming size was decreased with the increasing concentrations of IL‐1β, TNF‐α, or hyperosmotic stress, which was exacerbated when treated simultaneously with pro‐inflammatory factors and hyperosmotic stress. However, the colony‐forming capacity of CESCs recovered more easily from pro‐inflammatory factor treatment than from hyperosmotic stress treatment. Moreover, when compared with pro‐inflammatory factors treatment, hyperosmotic stress treatment caused a more significant increase of apoptotic and necrotic cell numbers and cell cycle arrest in the G2/M phase. Furthermore, the normal ability of corneal epithelial wound healing in the mice model was suppressed by both pro‐inflammatory factors and hyperosmotic stress treatment, and especially severely by hyperosmotic stress treatment. In addition, inflammation combined with hyperosmotic stress treatment induced more serious epithelial repair delays and apoptosis in corneal epithelium. Elevated levels of inflammatory factors were found in hyperosmotic stress‐treated cells and mice corneas, which persisted even during the recovery period. The results suggested that pro‐inflammatory factors cause transient inhibition, while hyperosmotic stress causes severe apoptosis and necrosis, persistent cell cycle arrest of CESCs, and severe corneal wound healing delay. Stem Cells Translational Medicine2019;8:46–57
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Affiliation(s)
- Lingling Yang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Songmei Zhang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Haoyun Duan
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Muchen Dong
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Xiaoli Hu
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Zhaohua Zhang
- Shandong Lunan Eye Hospital, Linyi, People's Republic of China
| | - Yao Wang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Xiaoping Zhang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Weiyun Shi
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
| | - Qingjun Zhou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, People's Republic of China
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78
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Seen S, Tong L. Dry eye disease and oxidative stress. Acta Ophthalmol 2018; 96:e412-e420. [PMID: 28834388 DOI: 10.1111/aos.13526] [Citation(s) in RCA: 151] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 06/04/2017] [Indexed: 12/13/2022]
Abstract
Dry eye, an age-related condition, is a multifactorial disease of the tears and ocular surface that results in symptoms of discomfort, visual disturbance and tear film instability. Environmental factors are also often implicated in dry eye including exposure to pollutants, ultraviolet (UV) radiation and ozone as well as the chronic use of preserved eyedrops such as in the treatment of glaucoma. These factors increase oxidative stress and ocular surface inflammation. Here, we reviewed the cellular, animal and clinical studies that point to the role of oxidative stress in dry eye disease. The biomarkers used to indicate oxidative damage in ocular surface tissues include 8-hydroxy-2 deoxyguanosine (8-OHdG), 4-hydroxynonenal (HNE) and malondialdehyde (MDD). Antioxidative defences in the ocular surface occur in the form of tear proteins such as lactoferrin and S100A proteins, and enzymes such as superoxide dismutase (SOD), peroxidase, catalase and mitochondrial oxidative enzymes. An imbalance between the level of reactive oxygen species (ROS) and the action of protective enzymes will lead to oxidative damage, and possibly inflammation. A small number of interventional studies suggest that oxidative stress may be directly targeted in topical therapy of dry eye treatment. For example, in vitro studies suggest that L-carnitine and pterostilbene, a blueberry component may reduce oxidative stress, and in animal studies, alpha-lipoic acid (ALP) and selenoprotein P may be helpful. Examples of treatments used in clinical trials include vitamin B12 eyedrops and iodide iontophoresis. With recent emphasis on ageing medicine and preventive holistic health, as well as the role of environmental science, research on oxidative stress in the ocular surface is likely to have increasing impact in the coming years.
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Affiliation(s)
- Sophia Seen
- Yong Loo Lin School of Medicine; National University of Singapore; Singapore Singapore
| | - Louis Tong
- Yong Loo Lin School of Medicine; National University of Singapore; Singapore Singapore
- Singapore National Eye Centre; Singapore Singapore
- Singapore Eye Research Institute; Singapore Singapore
- Duke-NUS Medical School; Singapore Singapore
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79
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Puro DG. Role of ion channels in the functional response of conjunctival goblet cells to dry eye. Am J Physiol Cell Physiol 2018; 315:C236-C246. [PMID: 29669221 DOI: 10.1152/ajpcell.00077.2018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Optimal vision requires an ocular surface with a stable tear film whose many critical tasks include providing >70% of the eye's refractive power. However, for millions, tear film instability produces uncomfortable sight-impairing dry eye. Despite the multitude of etiologies for dry eye, a universal hallmark is hyperosmolarity of the tear film. Presently, knowledge of how the ocular surface responds to hyperosmolarity remains incomplete with little understood about the role of ion channels. This bioelectric analysis focused on conjunctival goblet cells whose release of tear-stabilizing mucin is a key adaptive response to dry eye. In freshly excised rat conjunctiva, perforated-patch recordings demonstrated that a ≥10% rise in osmolarity triggers goblet cells to rapidly generate a ~15-mV hyperpolarization due to the oxidant-dependent activation of ATP-sensitive K+ (KATP) channels. High-resolution membrane capacitance measurements used to monitor exocytosis revealed that this hyperpolarization results in an approximately fourfold boost in exocytotic activity evoked by cholinergic input, which in vivo occurs via a neural reflex and depends chiefly on calcium influxing down its electro-gradient. We discovered that this adaptive response is transient. During 30-80 min of hyperosmolarity, development of a depolarizing nonspecific cation conductance fully counterbalances the KATP-driven hyperpolarization and thereby eliminates the exocytotic boost. We conclude that hyperosmotic-induced hyperpolarization is a previously unappreciated mechanism by which goblet cells respond to transient ocular dryness. Loss of this voltage increase during long-term dryness/hyperosmolarity may account for the clinical conundrum that goblet cells in chronically dry eyes can remain filled with mucin even though the tear film is hyperosmotic and mucin-deficient.
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Affiliation(s)
- Donald G Puro
- Department of Ophthalmology and Visual Sciences and Department of Molecular and Integrative Physiology, University of Michigan , Ann Arbor, Michigan
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80
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Xue EX, Lin JP, Zhang Y, Sheng SR, Liu HX, Zhou YL, Xu H. Pterostilbene inhibits inflammation and ROS production in chondrocytes by activating Nrf2 pathway. Oncotarget 2018; 8:41988-42000. [PMID: 28410217 PMCID: PMC5522043 DOI: 10.18632/oncotarget.16716] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 03/09/2017] [Indexed: 12/21/2022] Open
Abstract
Pterostilbene has been reported as a potential drug to inhibit oxidative stress and inflammation. However, the effect of pterostilbene on chondrocytes and osteoarthritis remains to be elucidated. We sought to investigate whether pterostilbene could protect chondrocytes from inflammation and ROS production through factor erythroid 2-related factor 2 (Nrf2) activation. The pterostilbene toxicity on chondrocytes collected from cartilages of Sprague-Dawley rats was assessed by CCK-8 test. Immunofluorescence and Western blotting explored the nuclear translocation of Nrf2. Nrf2 expression was silenced by siRNA to evaluate the involvement of Nrf2 in the effect of pterostilbene on chondrocytes. Finally, osteoarthritis model was established by the transection of anterior cruciate ligament and partial medial meniscectomy in rats, and then these rats received pterostilbene 30 mg/kg, daily, p.o. for 8 weeks. Histology and immunohistochemistry were used to assess histopathological change and Nrf2 expression in cartilage. Nuclear translocation of Nrf2 was stimulated by pterostilbene without cellular toxicity. Pterostilbene inhibited the level of COX-2, iNOS, PGE2, and NO, as well as the mitochondrial and total intracellular ROS production induced by IL-1β in chondrocytes, partially reversed by the Nrf2 silencing. Pterostilbene prevented cartilage degeneration and promoted the nuclear translocation of Nrf2 in cartilage. These results suggest that pterostilbene could inhibit the IL-1β-induced inflammation and ROS production in chondrocytes by stimulating the nuclear translocation of Nrf2.
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Affiliation(s)
- En-Xing Xue
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China
| | - Jian-Ping Lin
- Department of Orthopedic Surgery, Hainan Provincial People's Hospital, Haikou, Hainan, 570311, China
| | - Yu Zhang
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China
| | - Sun-Ren Sheng
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China
| | - Hai-Xiao Liu
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China
| | - Yu-Long Zhou
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China
| | - Hui Xu
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China
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81
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Experimental and Clinical Applications of Chamaecyparis obtusa Extracts in Dry Eye Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:4523673. [PMID: 29441148 PMCID: PMC5758851 DOI: 10.1155/2017/4523673] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 09/22/2017] [Accepted: 09/27/2017] [Indexed: 12/22/2022]
Abstract
Purpose To investigate the effects of Chamaecyparis obtusa (CO) on human corneal epithelial (HCE) cells, a murine experimental dry eye (EDE) model, and the efficacy of antioxidant eye mask in dry eye disease (DED) patients. Methods 0.001%, 0.01%, and 0.1% CO extracts were used to treat HCE cells, cell viability, and production of antioxidative enzymes, and reactive oxygen species (ROS) were assessed. Afterwards, CO extracts or balanced salt solution (BSS) was applied in EDE. Clinical and experimental parameters were measured at 7 days after treatment. In addition, DED patients were randomly assigned to wear either an eye mask containing CO extracts or a placebo. Clinical parameters were evaluated. Results The viability of HCE cells and antioxidative enzyme expression significantly improved after treatment with 0.1% CO extracts. Mice treated with 0.1% CO extracts showed significant improvement in clinical parameters. During the trial, the clinical parameters significantly improved in the treatment group at 4 weeks after application. Conclusions 0.1% CO extracts could promote the expression of antioxidative proteins and ROS production. In addition, an eye mask containing CO extracts could improve DED clinical parameters. These suggest that CO extracts may be useful as an adjunctive option for the DED treatment.
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Chien KJ, Horng CT, Huang YS, Hsieh YH, Wang CJ, Yang JS, Lu CC, Chen FA. Effects of Lycium barbarum (goji berry) on dry eye disease in rats. Mol Med Rep 2017; 17:809-818. [PMID: 29115477 PMCID: PMC5780158 DOI: 10.3892/mmr.2017.7947] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 09/19/2017] [Indexed: 01/08/2023] Open
Abstract
Lycium barbarum (goji berry) has long been used as a food and traditional herbal medicine. This study aimed to investigate the beneficial effect of the goji berry on dry eye disease in rats. Male Sprague-Dawley rats with induced dry eye disease were randomly assigned to four groups: Vehicle (control), low-dose goji berry extract [GBE; 250 mg/kg/body weight (bw)], median-dose GBE (350 mg/kg/bw), and high-dose GBE (500 mg/kg/bw). Three methods, Schirmer's test, tear break-up time (BUT) measurement and keratoconjunctival fluorescein staining, were used to evaluate the effect of GBE on symptoms of dry eye disease experienced by the rats. The results of the present study revealed that both the Schirmer's test score and tear BUT significantly increased following 1 week of GBE administration. Furthermore, the severity of the keratoconjunctival staining decreased significantly. In addition, the results suggested that administration of GBE may ameliorate dry eye disease symptoms in a dose-dependent manner. There were no mortalities and no apparent abnormal histopathology changes in the liver or kidney tissues of rats administered GBE for 21 consecutive days. Polysaccharides and betaine present in GBE may have important effects in alleviating dry eye disease induced by oxidative stress and inflammation. In conclusion, the goji berry is a safe, functional food with beneficial effects in alleviating dry eye disease.
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Affiliation(s)
- Kaung-Jen Chien
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan, R.O.C
| | - Chi-Ting Horng
- Department of Pharmacy and Master Program, Tajen University, Pingtung 90741, Taiwan, R.O.C
| | - Yu-Syuan Huang
- Department of Pharmacy and Master Program, Tajen University, Pingtung 90741, Taiwan, R.O.C
| | - Yi-Hsien Hsieh
- Institute of Biochemistry, Microbiology and Immunology, Chung Shang Medical University, Taichung 40201, Taiwan, R.O.C
| | - Chau-Jong Wang
- Institute of Biochemistry, Microbiology and Immunology, Chung Shang Medical University, Taichung 40201, Taiwan, R.O.C
| | - Jai-Sing Yang
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan, R.O.C
| | - Chi-Cheng Lu
- Department of Pharmacy, Buddhist Tzu Chi General Hospital, Hualien 97002, Taiwan, R.O.C
| | - Fu-An Chen
- Department of Pharmacy and Master Program, Tajen University, Pingtung 90741, Taiwan, R.O.C
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83
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Pflugfelder SC, de Paiva CS. The Pathophysiology of Dry Eye Disease: What We Know and Future Directions for Research. Ophthalmology 2017; 124:S4-S13. [PMID: 29055361 PMCID: PMC5657523 DOI: 10.1016/j.ophtha.2017.07.010] [Citation(s) in RCA: 267] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/10/2017] [Accepted: 07/11/2017] [Indexed: 12/31/2022] Open
Abstract
Clinical and laboratory studies performed over the past few decades have discovered that dry eye is a chronic inflammatory disease that can be initiated by numerous extrinsic or intrinsic factors that promote an unstable and hyperosmolar tear film. These changes in tear composition, in some cases combined with systemic factors, lead to an inflammatory cycle that causes ocular surface epithelial disease and neural stimulation. Acute desiccation activates stress signaling pathways in the ocular surface epithelium and resident immune cells. This triggers production of innate inflammatory mediators that stimulate the production of matrix metalloprotease, inflammatory cell recruitment, and dendritic cell maturation. These mediators, combined with exposure of autoantigens, can lead to an adaptive T cell-mediated response. Cornea barrier disruption develops by protease-mediated lysis of epithelial tight junctions, leading to accelerated cell death; desquamation; an irregular, poorly lubricated cornea surface; and exposure and sensitization of epithelial nociceptors. Conjunctival goblet cell dysfunction and death are promoted by the T helper 1 cytokine interferon gamma. These epithelial changes further destabilize the tear film, amplify inflammation, and create a vicious cycle. Cyclosporine and lifitegrast, the 2 US Food and Drug Administration-approved therapies, inhibit T-cell activation and cytokine production. Although these therapies represent a major advance in dry eye therapy, they are not effective in improving discomfort and corneal epithelial disease in all patients. Preclinical studies have identified other potential therapeutic targets, biomarkers, and strategies to bolster endogenous immunoregulatory pathways. These discoveries will, it is hoped, lead to further advances in diagnostic classification and treatment.
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Affiliation(s)
| | - Cintia S de Paiva
- Department of Ophthalmology, Baylor College of Medicine, Houston, Texas
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84
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Hua X, Chi W, Su L, Li J, Zhang Z, Yuan X. ROS-induced Oxidative Injury involved in Pathogenesis of Fungal Keratitis via p38 MAPK Activation. Sci Rep 2017; 7:10421. [PMID: 28874754 PMCID: PMC5585305 DOI: 10.1038/s41598-017-09636-w] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/25/2017] [Indexed: 12/17/2022] Open
Abstract
This study was to explore the mechanism by which reactive oxygen species (ROS)-induced oxidative stress involved in the pathogenesis of fungal keratitis using an in vivo experimental keratitis mouse model and an in vitro culture model of human corneal epithelial cells (HCECs). Compared to normal control mice and HCECs, ROS production was markedly increased in fungal corneas and HCECs exposed to Candida albicans, accompanied by p38 mitogen-activated protein kinases (MAPK) activation. Increased products of oxidative markers, malondialdehyde (MDA), 4–hydroxynonenal (HNE), mitochondria DNA 8-OHdG and aconitase-2 were observed in fungal infected corneas and HCECs. Fungal infection also increased the mRNA expression and protein production of heme oxygenase-1 (HMOX1) and cyclooxygenase-2 (COX2), with suppressed levels of antioxidant enzymes, superoxide dismutase-1 (SOD1), glutathione peroxidase-1 (GPx1) and peroxiredoxin-4 (PRDX4). Interestingly, the levels of ROS, oxidative markers and oxygenases were significantly reduced by co-cultured p38 inhibitor SB203580. Furthermore, SB203580 restored the levels of antioxidant enzymes suppressed by fungus. Our findings demonstrated for the first time that ROS-induced oxidative injury is involved in pathogenesis of fungal keratitis via p38 MAPK pathway, suggesting the novel therapeutic targets for the potential treatment of fungal keratitis.
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Affiliation(s)
- Xia Hua
- Department of Ophthalmology, Tianjin Orbit Research Institute, the Second Hospital of Tianjin Medical University, Tianjin, China
| | - Wei Chi
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
| | - Long Su
- Department of Ophthalmology, Tianjin Orbit Research Institute, the Second Hospital of Tianjin Medical University, Tianjin, China
| | - Jin Li
- Zhejiang Eye Hospital, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Zongduan Zhang
- Zhejiang Eye Hospital, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Xiaoyong Yuan
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, China.
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85
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Ji YW, Mittal SK, Hwang HS, Chang EJ, Lee JH, Seo Y, Yeo A, Noh H, Lee HS, Chauhan SK, Lee HK. Lacrimal gland-derived IL-22 regulates IL-17-mediated ocular mucosal inflammation. Mucosal Immunol 2017; 10:1202-1210. [PMID: 28051088 PMCID: PMC5496813 DOI: 10.1038/mi.2016.119] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 11/09/2016] [Indexed: 02/04/2023]
Abstract
Inflammatory damage of mucosal surface of the eye is a hallmark of dry eye disease (DED) and, in severe cases, can lead to significant discomfort, visual impairment, and blindness. DED is a multifactorial autoimmune disorder with a largely unknown pathogenesis. Using a cross-sectional patient study and a well-characterized murine model of DED, herein we investigated the immunoregulatory function of interleukin-22 (IL-22) in the pathogenesis of DED. We found that IL-22 levels were elevated in lacrimal fluids of DED patients and inversely correlated with severity of disease. Acinar cells of the lacrimal glands (LGs), not inflammatory immune cells, are the primary source of IL-22, which suppresses inflammation in ocular surface epithelial cells upon desiccating stress. Moreover, loss of function analyses using IL-22 knockout mice demonstrated that IL-22 is essential for suppression of ocular surface infiltration of Th17 cells and inhibition of DED induction. Our novel findings elucidate immunoregulatory function of LG-derived IL-22 in inhibiting IL-17-mediated ocular surface epitheliopathy in DED thus making IL-22 a new relevant therapeutic target.
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Affiliation(s)
- Yong Woo Ji
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
- Cornea Dystrophy Research Institute, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Sharad K. Mittal
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA
| | - Ho Sik Hwang
- Department of Ophthalmology, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon, Gangwon-Do, Korea
| | - Eun-Ju Chang
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA
| | - Joon H. Lee
- Myunggok Eye Research Institute, Kim’s Eye Hospital, Konyang University College of Medicine, Seoul, Korea
| | - Yuri Seo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Areum Yeo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Hyemi Noh
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Hye Sun Lee
- Biostatistics Collaboration Unit, Medical Research Center, Yonsei University College of Medicine, Seoul. Korea
| | - Sunil K. Chauhan
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA
| | - Hyung Keun Lee
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
- Cornea Dystrophy Research Institute, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
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86
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Effect of Nitric Oxide on Human Corneal Epithelial Cell Viability and Corneal Wound Healing. Sci Rep 2017; 7:8093. [PMID: 28808342 PMCID: PMC5556055 DOI: 10.1038/s41598-017-08576-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 07/14/2017] [Indexed: 01/05/2023] Open
Abstract
Although the wound healing effects of nitric oxide (NO) are known, the mechanism by which NO modulates corneal wound healing remains unclear. In this study, we investigated the effect of exogenous NO donor (NaNO2) on corneal wound healing. We found that NaNO2 (0.1 μM to 100 μM) increased human corneal epithelial cell (HCEC) viability and migration. It also modulated the phosphorylation of mitogen-activated protein kinases (MAPKs) in a time- dependent manner in those HCECs. Further, p38 MAPK phosphorylation increased at 6 h and normalized at 24 h, while the phosphorylation of extracellular signal regulated kinase (ERK) was increased both at 6 h and 24 h. Topical treatment with NaNO2 (10 μM) enhanced corneal epithelial healing and decreased corneal opacity in murine corneal alkali burn model by modulating inflammatory cytokines. Our findings suggest that NO increased HCEC proliferation and migration via time-dependent MAPK activation and eventually enhanced corneal recovery from the alkali burn.
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87
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Niu C, Ma M, Han X, Wang Z, Li H. Hyperin protects against cisplatin-induced liver injury in mice. Acta Cir Bras 2017; 32:633-640. [PMID: 28902939 DOI: 10.1590/s0102-865020170080000005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 07/18/2017] [Indexed: 12/30/2022] Open
Affiliation(s)
- Chengwei Niu
- Jiangsu Food and Pharmaceutical Science College, China
| | - Man Ma
- Jiangsu Food and Pharmaceutical Science College, China
| | - Xiao Han
- Huai an Hospital of Huai’an, China
| | - Zimin Wang
- Jiangsu Food and Pharmaceutical Science College, China
| | - Hangyan Li
- Jiangsu Food and Pharmaceutical Science College, China
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88
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Shellhammer JP, Morin-Kensicki E, Matson JP, Yin G, Isom DG, Campbell SL, Mohney RP, Dohlman HG. Amino acid metabolites that regulate G protein signaling during osmotic stress. PLoS Genet 2017; 13:e1006829. [PMID: 28558063 PMCID: PMC5469498 DOI: 10.1371/journal.pgen.1006829] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 06/13/2017] [Accepted: 05/17/2017] [Indexed: 12/29/2022] Open
Abstract
All cells respond to osmotic stress by implementing molecular signaling events to protect the organism. Failure to properly adapt can lead to pathologies such as hypertension and ischemia-reperfusion injury. Mitogen-activated protein kinases (MAPKs) are activated in response to osmotic stress, as well as by signals acting through G protein-coupled receptors (GPCRs). For proper adaptation, the action of these kinases must be coordinated. To identify second messengers of stress adaptation, we conducted a mass spectrometry-based global metabolomics profiling analysis, quantifying nearly 300 metabolites in the yeast S. cerevisiae. We show that three branched-chain amino acid (BCAA) metabolites increase in response to osmotic stress and require the MAPK Hog1. Ectopic addition of these BCAA derivatives promotes phosphorylation of the G protein α subunit and dampens G protein-dependent transcription, similar to that seen in response to osmotic stress. Conversely, genetic ablation of Hog1 activity or the BCAA-regulatory enzymes leads to diminished phosphorylation of Gα and increased transcription. Taken together, our results define a new class of candidate second messengers that mediate cross talk between osmotic stress and GPCR signaling pathways.
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Affiliation(s)
- James P. Shellhammer
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | | | - Jacob P. Matson
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Guowei Yin
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Daniel G. Isom
- The University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Sharon L. Campbell
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Robert P. Mohney
- Metabolon, Inc., Research Triangle Park, North Carolina, United States of America
| | - Henrik G. Dohlman
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- * E-mail:
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89
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Niu C, Wan J, Bian Y, Li F, Lan J. Baicalein and its underlying mechanism as a protector against liver injury induced by cisplatin in mice. BIOTECHNOL BIOTEC EQ 2016. [DOI: 10.1080/13102818.2016.1257924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Chengwei Niu
- College of Pharmacy, Jiangsu Food and Pharmaceutical Science College, Huai'an, China
| | - Jing Wan
- College of Pharmacy, Jiangsu Food and Pharmaceutical Science College, Huai'an, China
| | - Yue Bian
- College of Pharmacy, Jiangsu Food and Pharmaceutical Science College, Huai'an, China
| | - Feng Li
- College of Pharmacy, Jiangsu Food and Pharmaceutical Science College, Huai'an, China
| | - Jiandong Lan
- College of Pharmacy, Jiangsu Food and Pharmaceutical Science College, Huai'an, China
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90
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Hashempour-Baltork F, Torbati M, Azadmard-Damirchi S, Savage GP. Vegetable oil blending: A review of physicochemical, nutritional and health effects. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2016.09.007] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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91
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Warcoin E, Clouzeau C, Brignole-Baudouin F, Baudouin C. Hyperosmolarité : effets intracellulaires et implication dans la sécheresse oculaire. J Fr Ophtalmol 2016; 39:641-51. [DOI: 10.1016/j.jfo.2016.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 07/27/2016] [Accepted: 07/27/2016] [Indexed: 11/26/2022]
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92
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A Case-Control Study on the Oxidative Balance of 50% Autologous Serum Eye Drops. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:9780193. [PMID: 27635188 PMCID: PMC5011221 DOI: 10.1155/2016/9780193] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 07/21/2016] [Indexed: 11/17/2022]
Abstract
Importance. Autologous serum (AS) eye drops are recommended for severe dry eye in patients with ocular surface disease. No description of the antioxidant balance of AS eye drops has been reported in the literature. Objective. This study sought to evaluate the total reactive antioxidant potential (TRAP) and concentration of reactive oxygen species (ROS) in samples of 50% AS eye drops and their correlations with the demographic characteristics and lifestyle habits of patients with ocular surface disease and healthy controls. Design. This was a case-control study with a 3-month follow-up period. Participants. 16 patients with severe dry eye disease of different etiologies and 17 healthy controls matched by age, gender, and race were included. Results. TRAP and ROS were detected at all evaluated times. There were no differences in the mean ROS (p = 0.429) or TRAP (p = 0.475) levels between cases and controls. No statistically significant differences in the concentrations of ROS or TRAPs were found at 0, 15, or 30 days (p for ROS = 0.087 and p for TRAP = 0.93). Neither the demographic characteristics nor the lifestyle habits were correlated with the oxidative balance of the 50% AS eye drops. Conclusions and Relevance. Both fresh and frozen 50% AS eye drops present antioxidant capacities and ROS in an apparently stable balance. Moreover, patients with ocular surface disease and normal controls produce equivalent AS eye drops in terms of oxidative properties.
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93
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Warcoin E, Baudouin C, Gard C, Brignole-Baudouin F. In Vitro Inhibition of NFAT5-Mediated Induction of CCL2 in Hyperosmotic Conditions by Cyclosporine and Dexamethasone on Human HeLa-Modified Conjunctiva-Derived Cells. PLoS One 2016; 11:e0159983. [PMID: 27486749 PMCID: PMC4972436 DOI: 10.1371/journal.pone.0159983] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 07/12/2016] [Indexed: 01/13/2023] Open
Abstract
Purpose To investigate the pro-inflammatory intracellular mechanisms induced by an in vitro model of dry eye disease (DED) on a Hela-modified conjunctiva-derived cells in hyperosmolarity (HO) stress conditions. This study focused on CCL2 induction and explored the implications of the nuclear factor of activated T-cells 5 (NFAT5) as well as mitogen-activated protein kinases (MAPK) and nuclear factor kappa B (NFĸB). This work was completed by an analysis of the effects of cyclosporine A (CsA), dexamethasone (Dex) and doxycycline (Dox) on HO-induced CCL2 and NFAT5 induction. Methods A human HeLa-modified conjunctiva-derived cell line was cultured in NaCl-hyperosmolar medium for various exposure times. Cellular viability, CCL2 secretion, NFAT5 and CCL2 gene expression, and intracytoplasmic NFAT5 were assessed using the Cell Titer Blue® assay, enzyme-linked immunosorbent assay (ELISA), RT-qPCR and immunostaining, respectively. In selected experiments, inhibitors of MAPKs or NFκB, therapeutic agents or NFAT5 siRNAs were added before the hyperosmolar stimulations. Results HO induced CCL2 secretion and expression as well as NFAT5 gene expression and translocation. Adding NFAT5-siRNA before hyperosmolar stimulation led to a complete inhibition of CCL2 induction and to a decrease in cellular viability. p38 MAPK (p38), c-Jun NH2-terminal kinase (JNK) and NFĸB inhibitors, CsA and Dex induced a partial inhibition of HO-induced CCL2, while Dox and extracellular signal-regulated kinase (ERK) inhibitor did not. Dex also induced a partial inhibition of HO-induced NFAT5 gene expression but not CsA or Dox. Conclusions These in vitro results suggest a potential role of CCL2 in DED and highlight the crucial role of NFAT5 in the pro-inflammatory effect of HO on HeLa-modified conjunctiva-derived cells, a rarely studied cellular type. This inflammatory pathway involving NFAT5 and CCL2 could offer a promising target for developing new therapies to treat DED, warranting further investigations to fully grasp the complete intracellular mechanisms.
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Affiliation(s)
- Elise Warcoin
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, Paris, France
- CHNO des Quinze-Vingts, Service Pharmacie, Paris, France
- * E-mail: (EW); (FB)
| | - Christophe Baudouin
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, Paris, France
- CHNO des Quinze-Vingts, Service III, Paris, France
| | | | - Françoise Brignole-Baudouin
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, Paris, France
- Faculté de Pharmacie de Paris, Univ Paris Descartes, Sorbonne Paris Cité, Paris, France
- * E-mail: (EW); (FB)
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94
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Lahtvee PJ, Kumar R, Hallström BM, Nielsen J. Adaptation to different types of stress converge on mitochondrial metabolism. Mol Biol Cell 2016; 27:2505-14. [PMID: 27307591 PMCID: PMC4966989 DOI: 10.1091/mbc.e16-03-0187] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 06/08/2016] [Indexed: 01/12/2023] Open
Abstract
Yeast cell factories encounter physical and chemical stresses when used for industrial production of fuels and chemicals. These stresses reduce productivity and increase bioprocess costs. Understanding the mechanisms of the stress response is essential for improving cellular robustness in platform strains. We investigated the three most commonly encountered industrial stresses for yeast (ethanol, salt, and temperature) to identify the mechanisms of general and stress-specific responses under chemostat conditions in which specific growth rate-dependent changes are eliminated. By applying systems-level analysis, we found that most stress responses converge on mitochondrial processes. Our analysis revealed that stress-specific factors differ between applied stresses; however, they are underpinned by an increased ATP demand. We found that when ATP demand increases to high levels, respiration cannot provide sufficient ATP, leading to onset of respirofermentative metabolism. Although stress-specific factors increase ATP demand for cellular growth under stressful conditions, increased ATP demand for cellular maintenance underpins a general stress response and is responsible for the onset of overflow metabolism.
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Affiliation(s)
- Petri-Jaan Lahtvee
- Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden Novo Nordisk Foundation Center for Biosustainability, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Rahul Kumar
- Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Björn M Hallström
- Science for Life Laboratory, Royal Institute of Technology, 171 21, Stockholm, Sweden
| | - Jens Nielsen
- Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden Novo Nordisk Foundation Center for Biosustainability, Chalmers University of Technology, 412 96 Gothenburg, Sweden Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2970 Hørsholm, Denmark
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95
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Therapeutic Efficacy of Topically Applied Antioxidant Medicinal Plant Extracts in a Mouse Model of Experimental Dry Eye. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:4727415. [PMID: 27313829 PMCID: PMC4899589 DOI: 10.1155/2016/4727415] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 05/05/2016] [Indexed: 01/07/2023]
Abstract
Purpose. To investigate the therapeutic effects of topical administration of antioxidant medicinal plant extracts in a mouse model of experimental dry eye (EDE). Methods. Eye drops containing balanced salt solution (BSS) or 0.001%, 0.01%, and 0.1% extracts were applied for the treatment of EDE. Tear volume, tear film break-up time (BUT), and corneal fluorescein staining scores were measured 10 days after desiccating stress. In addition, we evaluated the levels of interleukin- (IL-) 1β, tumor necrosis factor- (TNF-) α, IL-6, interferon- (IFN-) γ, and IFN-γ associated chemokines, percentage of CD4+C-X-C chemokine receptor type 3 positive (CXCR3+) T cells, goblet cell density, number of 4-hydroxy-2-nonenal (4-HNE) positive cells, and extracellular reactive oxygen species (ROS) production. Results. Compared to the EDE and BSS control groups, the mice treated with topical application of the 0.1% extract showed significant improvements in all clinical parameters, IL-1β, IL-6, TNF-α, and IFN-γ levels, percentage of CD4+CXCR3+ T cells, goblet cell density, number of 4-HNE-positive cells, and extracellular ROS production (P < 0.05). Conclusions. Topical application of 0.1% medicinal plant extracts improved clinical signs, decreased inflammation, and ameliorated oxidative stress marker and ROS production on the ocular surface of the EDE model mice.
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96
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Li J, Ruzhi Deng, Hua X, Zhang L, Lu F, Coursey TG, Pflugfelder SC, Li DQ. Blueberry Component Pterostilbene Protects Corneal Epithelial Cells from Inflammation via Anti-oxidative Pathway. Sci Rep 2016; 6:19408. [PMID: 26762881 PMCID: PMC4725955 DOI: 10.1038/srep19408] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 12/07/2015] [Indexed: 12/12/2022] Open
Abstract
Blueberries have been recognized to possess protective properties from inflammation and various diseases, but not for eye and ocular disorders. This study explores potential benefits of pterostilbene (PS), a natural component of blueberries, in preventing ocular surface inflammation using an in vitro culture model of human corneal epithelial cells (HCECs) exposed to hyperosmotic medium at 450 mOsM. Gene expression was detected by RT-qPCR, and protein production or activity was determined by ELISA, zymography, Western blotting and immunofluorescent staining. Reactive oxygen species (ROS) production was measured using DCFDA kit. The addition of PS significantly reduced the expression of pro-inflammatory mediators, TNF-α, IL-1 β, IL-6, MMP-2 and MMP-9 in HCECs exposed to hyperosmotic medium. Pre-treatment with PS (5 to 20 μM) suppressed ROS overproduction in a dose-dependent manner. Additionally, PS significantly decreased the levels of oxidative damage biomarkers, malondialdehyde (MDA), 4-hydroxynonenal (4-HNE), aconitase-2 and 8-hydroxydeoxyguanosine (8-OHdG). Importantly, PS was found to rebalance homeostasis between oxygenases and anti-oxidative enzymes by decreasing cyclooxygenase 2 (COX2) expression and restoring the activity of antioxidant enzymes, superoxide dismutase 1 (SOD1) and peroxiredoxin-4 (PRDX4) during hyperosmotic stress. Our findings demonstrate that PS protects human cornea from hyperosmolarity-induced inflammation and oxidative stress, suggesting protective effects of PS on dry eye.
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Affiliation(s)
- Jin Li
- Zhejiang Eye Hospital, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China.,Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
| | - Ruzhi Deng
- Zhejiang Eye Hospital, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China.,Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
| | - Xia Hua
- Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA.,Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, China
| | - Lili Zhang
- Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
| | - Fan Lu
- Zhejiang Eye Hospital, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Terry G Coursey
- Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
| | - Stephen C Pflugfelder
- Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
| | - De-Quan Li
- Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
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97
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Asensio-Lopez MC, Lax A, Sanchez-Mas J, Avellaneda A, Planes J, Pascual-Figal DA. Reformulated meat products protect against ischemia-induced cardiac damage. Food Funct 2016; 7:992-1001. [PMID: 26751429 DOI: 10.1039/c5fo01189b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The protective effects of the antioxidants present in food are of great relevance for cardiovascular health. This study evaluates whether the extracts from reformulated meat products with a reduction in fat and/or sodium content exert a cardioprotective effect against ischemia-induced oxidative stress in cardiomyocytes, compared with non-meat foods. Ischemic damage caused loss of cell viability, increased reactive oxygen species and lipid peroxidation and decreased the antioxidant activity. Pretreatment for 24 h with digested or non-digested extracts from reformulated meat products led to protection against ischemia-induced oxidative damage: increased cell viability, reduced oxidative stress and restored the antioxidant activity. Similar results were obtained using extracts from tuna fish, but not with the extracts of green peas, salad or white beans. These results suggest that reformulated meat products have a beneficial impact in protecting cardiac cells against ischemia, and they may represent a source of natural antioxidants with benefits for cardiovascular health.
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Affiliation(s)
- M C Asensio-Lopez
- Cardiology Department, University Hospital Virgen de la Arrixaca and Department of Internal Medicine, School of Medicine, University of Murcia, Spain.
| | - A Lax
- Cardiology Department, University Hospital Virgen de la Arrixaca and Department of Internal Medicine, School of Medicine, University of Murcia, Spain.
| | - J Sanchez-Mas
- Cardiology Department, University Hospital Virgen de la Arrixaca and Department of Internal Medicine, School of Medicine, University of Murcia, Spain.
| | - A Avellaneda
- R&D Department, ElPozo Alimentación S.A., Alhama de Murcia, Spain
| | - J Planes
- R&D Department, ElPozo Alimentación S.A., Alhama de Murcia, Spain
| | - D A Pascual-Figal
- Cardiology Department, University Hospital Virgen de la Arrixaca and Department of Internal Medicine, School of Medicine, University of Murcia, Spain.
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98
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Petrov A, Perekhvatova N, Skulachev M, Stein L, Ousler G. SkQ1 Ophthalmic Solution for Dry Eye Treatment: Results of a Phase 2 Safety and Efficacy Clinical Study in the Environment and During Challenge in the Controlled Adverse Environment Model. Adv Ther 2016; 33:96-115. [PMID: 26733410 PMCID: PMC4735228 DOI: 10.1007/s12325-015-0274-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Indexed: 01/28/2023]
Abstract
Introduction This Phase 2 clinical trial assessed the efficacy and safety of the novel antioxidative, renewable compound SkQ1 for topical treatment of dry eye signs and symptoms. Methods In a single-center, randomized, double-masked, placebo-controlled, 29-day study, 91 subjects with mild to moderate dry eye instilled the study drug twice daily and recorded dry eye symptoms daily. Subjects were randomized 1:1:1 into one of three ophthalmic solution treatment groups: SkQ1 1.55 µg/mL, SkQ1 0.155 µg/mL, or 0.0 µg/mL (placebo). Subjects were exposed to a controlled adverse environment chamber at 3 of the 4 study visits (Day −7, Day 1, and Day 29). Investigator assessments occurred at all study visits. Results SkQ1 was safe and efficacious in treating dry eye signs and symptoms. Statistically significant improvements with SkQ1 compared to placebo occurred for the dry eye signs of corneal fluorescein staining and lissamine green staining in the central region and lid margin redness, and for the dry eye symptoms of ocular discomfort, dryness, and grittiness. In addition, SkQ1 demonstrated greater efficacy compared to placebo, although the differences were not statistically significant, for corneal fluorescein staining in other regions and/or time points (total staining score, central region, corneal sum score, and temporal region), lissamine green staining for the central and nasal regions, and blink rate scores. Conclusions This Phase 2 study indicated that SkQ1 is safe and efficacious for the treatment of dry eye signs and symptoms and supported previous study results. Trial registration Clinicaltrials.gov identifier: NCT02121301. Funding Miotech S.A. Electronic supplementary material The online version of this article (doi:10.1007/s12325-015-0274-5) contains supplementary material, which is available to authorized users.
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99
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Sinha RK, Pospíšil P, Maheshwari P, Eudes F. Bcl-2△21 and Ac-DEVD-CHO Inhibit Death of Wheat Microspores. FRONTIERS IN PLANT SCIENCE 2016; 7:1931. [PMID: 28082995 PMCID: PMC5184288 DOI: 10.3389/fpls.2016.01931] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 12/05/2016] [Indexed: 05/06/2023]
Abstract
Microspore cell death and low green plant production efficiency are an integral obstacle in the development of doubled haploid production in wheat. The aim of the current study was to determine the effect of anti-apoptotic recombinant human B-cell lymphoma-2 (Bcl-2△21) and caspase-3-inhibitor (Ac-DEVD-CHO) in microspore cell death in bread wheat cultivars AC Fielder and AC Andrew. Induction medium containing Bcl-2△21 and Ac-DEVD-CHO yielded a significantly higher number of viable microspores, embryo-like structures and total green plants in wheat cultivars AC Fielder and AC Andrew. Total peroxidase activity was lower in Bcl-2△21 treated microspore cultures at 96 h of treatment compared to control and Ac-DEVD-CHO. Electron paramagnetic resonance study of total microspore protein showed a different scavenging activity for Bcl-2△21 and Ac-DEVD-CHO. Bcl-2△21 scavenged approximately 50% hydroxyl radical (HO•) formed, whereas Ac-DEVD-CHO scavenged approximately 20% of HO•. Conversely, reduced caspase-3-like activities were detected in the presence of Bcl-2△21 and Ac-DEVD-CHO, supporting the involvement of Bcl-2△21 and Ac-DEVD-CHO in increasing microspore viability by reducing oxidative stress and caspase-3-like activity. Our results indicate that Bcl-2△21 and Ac-DEVD-CHO protects cells from cell death following different pathways. Bcl-2△21 prevents cell damage by detoxifying HO• and suppressing caspase-3-like activity, while Ac-DEVD-CHO inhibits the cell death pathways by modulating caspase-like activity.
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Affiliation(s)
- Rakesh K. Sinha
- Cereal Biotechnology, Agriculture and Agri-Food Canada, LethbridgeAB, Canada
- Department of Plant Anatomy and Cytology, Faculty of Biology and Environmental Protection, University of SilesiaKatowice, Poland
- *Correspondence: Rakesh K. Sinha,
| | - Pavel Pospíšil
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký UniversityOlomouc, Czechia
| | - Priti Maheshwari
- Cereal Biotechnology, Agriculture and Agri-Food Canada, LethbridgeAB, Canada
| | - François Eudes
- Cereal Biotechnology, Agriculture and Agri-Food Canada, LethbridgeAB, Canada
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Establishment and characterization of a telomerase-immortalized canine bronchiolar epithelial cell line. Appl Microbiol Biotechnol 2015; 99:9135-46. [PMID: 26156242 DOI: 10.1007/s00253-015-6794-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 06/21/2015] [Accepted: 06/23/2015] [Indexed: 02/07/2023]
Abstract
Dogs are susceptible to infectious diseases that occur primarily in the respiratory tract. The airway epithelium acts as a first line of defense and is constantly exposed to microorganisms present in the environment. Respiratory epithelial cells have recently gained wide use as a cell model for studying the pathogenesis of human, murine or swine respiratory pathogen infections. However, studies of the pathogenic mechanisms of canine pathogens have been hindered by the lack of reliable respiratory cell lines. Here, we cultured primary canine bronchiolar epithelial cells (CBECs), whose characteristics were confirmed by their expression of the epithelial cell-specific marker cytokeratin 18, and have provided protocols for their isolation and ex vivo expansion. Further, we established immortalized CBECs containing the human telomerase reverse transcriptase (hTERT) gene via transfection of primary CBECs with the recombinant plasmid pEGFP-hTERT. Immortalized bronchiolar epithelial cells (hTERT-CBECs) retain the morphological and functional features of primary CBECs, as indicated by reverse transcriptase polymerase chain reaction, proliferation assays, karyotype analysis, telomerase activity assay, and Western blotting, which demonstrate that hTERT-CBECs have higher telomerase activity, an extended proliferative lifespan, and a diploid complement of chromosomes, even after Passage 50. Moreover, this cell line is not transformed, as evaluated using soft agar assays and tumorigenicity analysis in nude mice, and can therefore be safely used in future studies. The isolation and establishment of stable hTERT-CBECs is of great importance for use as an in vitro model for mechanistic studies of canine pathogenic infections.
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