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Feng J, Zhang Y. The potential benefits of polyphenols for corneal diseases. Biomed Pharmacother 2023; 169:115862. [PMID: 37979379 DOI: 10.1016/j.biopha.2023.115862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/30/2023] [Accepted: 11/05/2023] [Indexed: 11/20/2023] Open
Abstract
The cornea functions as the primary barrier of the ocular surface, regulating temperature and humidity while providing protection against oxidative stress, harmful stimuli and pathogenic microorganisms. Corneal diseases can affect the biomechanical and optical properties of the eye, resulting in visual impairment or even blindness. Due to their diverse origins and potent biological activities, plant secondary metabolites known as polyphenols offer potential advantages for treating corneal diseases owing to their anti-inflammatory, antioxidant, and antibacterial properties. Various polyphenols and their derivatives have demonstrated diverse mechanisms of action in vitro and in vivo, exhibiting efficacy against a range of corneal diseases including repair of tissue damage, treatment of keratitis, inhibition of neovascularization, alleviation of dry eye syndrome, among others. Therefore, this article presents a concise overview of corneal and related diseases, along with an update on the research progress of natural polyphenols in safeguarding corneal health. A more comprehensive understanding of natural polyphenols provides a novel perspective for secure treatment of corneal diseases.
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Affiliation(s)
- Jing Feng
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University, Qingdao, China
| | - Yangyang Zhang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University, Qingdao, China.
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2
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Araújo GDMS, Loureiro AIS, Rodrigues JL, Barros PAB, Halicki PCB, Ramos DF, Marinho MAG, Vaiss DP, Vaz GR, Yurgel VC, Bidone J, Muccillo-Baisch AL, Hort MA, Paulo AMC, Dora CL. Toward a Platform for the Treatment of Burns: An Assessment of Nanoemulsions vs. Nanostructured Lipid Carriers Loaded with Curcumin. Biomedicines 2023; 11:3348. [PMID: 38137569 PMCID: PMC10742090 DOI: 10.3390/biomedicines11123348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/30/2023] [Accepted: 12/11/2023] [Indexed: 12/24/2023] Open
Abstract
Curcumin is a highly promising substance for treating burns, owing to its anti-inflammatory, antioxidant, antimicrobial, and wound-healing properties. However, its therapeutic use is restricted due to its hydrophobic nature and low bioavailability. This study was conducted to address these limitations; it developed and tested two types of lipid nanocarriers, namely nanoemulsions (NE-CUR) and nanostructured lipid carriers (NLC-CUR) loaded with curcumin, and aimed to identify the most suitable nanocarrier for skin burn treatment. The study evaluated various parameters, including physicochemical characteristics, stability, encapsulation efficiency, release, skin permeation, retention, cell viability, and antimicrobial activity. The results showed that both nanocarriers showed adequate size (~200 nm), polydispersity index (~0.25), and zeta potential (~>-20 mV). They also showed good encapsulation efficiency (>90%) and remained stable for 120 days at different temperatures. In the release test, NE-CUR and NCL-CUR released 57.14% and 51.64% of curcumin, respectively, in 72 h. NE-CUR demonstrated better cutaneous permeation/retention in intact or scalded skin epidermis and dermis than NLC-CUR. The cell viability test showed no toxicity after treatment with NE-CUR and NLC-CUR up to 125 μg/mL. Regarding microbial activity assays, free curcumin has activity against P. aeruginosa, reducing bacterial growth by 75% in 3 h. NE-CUR inhibited bacterial growth by 65% after 24 h, and the association with gentamicin had favorable results, while NLC-CUR showed a lower inhibition. The results demonstrated that NE-CUR is probably the most promising nanocarrier for treating burns.
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Affiliation(s)
| | - Ana Isabel Sá Loureiro
- CEB-Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Jamile Lima Rodrigues
- Graduate Program in Food Science and Engineering, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
| | | | | | - Daniela Fernandes Ramos
- Graduate Program in Health Sciences, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
| | | | - Daniela Pastorim Vaiss
- Graduate Program in Health Sciences, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
| | - Gustavo Richter Vaz
- Graduate Program in Health Sciences, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
| | - Virginia Campello Yurgel
- Graduate Program in Health Sciences, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
| | - Juliana Bidone
- Center of Chemical, Pharmaceutical, and Food Sciences, Federal University of Pelotas, Pelotas 96010-610, RS, Brazil
| | - Ana Luiza Muccillo-Baisch
- Graduate Program in Health Sciences, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
| | - Mariana Appel Hort
- Graduate Program in Health Sciences, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
| | - Artur Manuel Cavaco Paulo
- CEB-Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Cristiana Lima Dora
- Graduate Program in Health Sciences, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
- Graduate Program in Food Science and Engineering, Federal University of Rio Grande, Rio Grande 96203-900, RS, Brazil
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Böhm EW, Buonfiglio F, Voigt AM, Bachmann P, Safi T, Pfeiffer N, Gericke A. Oxidative stress in the eye and its role in the pathophysiology of ocular diseases. Redox Biol 2023; 68:102967. [PMID: 38006824 DOI: 10.1016/j.redox.2023.102967] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 11/27/2023] Open
Abstract
Oxidative stress occurs through an imbalance between the generation of reactive oxygen species (ROS) and the antioxidant defense mechanisms of cells. The eye is particularly exposed to oxidative stress because of its permanent exposure to light and due to several structures having high metabolic activities. The anterior part of the eye is highly exposed to ultraviolet (UV) radiation and possesses a complex antioxidant defense system to protect the retina from UV radiation. The posterior part of the eye exhibits high metabolic rates and oxygen consumption leading subsequently to a high production rate of ROS. Furthermore, inflammation, aging, genetic factors, and environmental pollution, are all elements promoting ROS generation and impairing antioxidant defense mechanisms and thereby representing risk factors leading to oxidative stress. An abnormal redox status was shown to be involved in the pathophysiology of various ocular diseases in the anterior and posterior segment of the eye. In this review, we aim to summarize the mechanisms of oxidative stress in ocular diseases to provide an updated understanding on the pathogenesis of common diseases affecting the ocular surface, the lens, the retina, and the optic nerve. Moreover, we discuss potential therapeutic approaches aimed at reducing oxidative stress in this context.
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Affiliation(s)
- Elsa Wilma Böhm
- Department of Ophthalmology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany.
| | - Francesco Buonfiglio
- Department of Ophthalmology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Anna Maria Voigt
- Department of Ophthalmology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Philipp Bachmann
- Department of Ophthalmology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Tarek Safi
- Department of Ophthalmology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Norbert Pfeiffer
- Department of Ophthalmology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Adrian Gericke
- Department of Ophthalmology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany.
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Liu W, Lin T, Gong L. ZD6474 Attenuates Fibrosis and Inhibits Neovascularization in Human Pterygium by Suppressing AKT-mTOR Signaling Pathway. J Ocul Pharmacol Ther 2023; 39:128-138. [PMID: 36576784 DOI: 10.1089/jop.2022.0127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Purpose: To investigate the antifibrotic effect of ZD6474 in human pterygium fibroblasts (HPFs) and angiogenesis in human umbilical vein endothelial cells (HUVECs) compared with mitomycin C (MMC). Methods: Pterygium and tenon fibroblasts were isolated from patients undergoing surgery to culture HPFs and human tenon fibroblasts (HTFs). The effects of ZD6474 on HPF, HTF, and HUVEC proliferation and migration were detected using CCK8 and wound-healing assays, respectively. Fibrosis and epithelial-mesenchymal transformation (EMT) were evaluated by western blotting [transforming growth factor beta (TGF-β)1/2 and snail] and immunofluorescence (vimentin and α-smooth muscle actin). The antiangiogenic effect of ZD6474 on HUVECs was assessed using a tube formation assay. To determine the potential mechanism, the expression of phosphorylated AKT (p-AKT) and phosphorylated mTOR (p-mTOR) was evaluated by treatment with ZD6474 via western blotting. Results: ZD6474 robustly inhibited the proliferation and migration of HPFs rather than HTFs compared with those in the MMC group (**P < 0.01). In HPFs, fibrosis and EMT (vimentin, TGF-β1/2, and snail) were significantly reversed by ZD6474. MMC (>50 μg/mL) significantly reduced HTF viability, whereas ZD6474 (<5 μM/mL) did not decrease HTF viability. HUVEC proliferation and migration were clearly decreased, and tube formation was notably interrupted by ZD6474. Activation of p-AKT and p-mTOR was inhibited by ZD6474 treatment of HPFs and HUVECs. Conclusion: ZD6474 is more effective than MMC in reducing fibrosis and EMT in HPFs. In addition, ZD6474 was less toxic to HTFs. ZD6474 also exhibited antiangiogenic effects in HUVECs. This study may aid in the development of novel agents to prevent pterygium recurrence after pterygium excision.
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Affiliation(s)
- Wenting Liu
- Department of Ophthalmology and Vision Science, The Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia, Laboratory of Myopia, Chinese Academy of Medical Sciences, Fudan University, Shanghai, China
- Department of Ophthalmology, Huadong Hospital of Fudan University, Shanghai, China
| | - Tong Lin
- Department of Ophthalmology and Vision Science, The Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia, Laboratory of Myopia, Chinese Academy of Medical Sciences, Fudan University, Shanghai, China
| | - Lan Gong
- Department of Ophthalmology and Vision Science, The Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai, China
- NHC Key Laboratory of Myopia, Laboratory of Myopia, Chinese Academy of Medical Sciences, Fudan University, Shanghai, China
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Baheran SS, Alany RG, Schwikkard S, Muen W, Salman LN, Freestone N, Al-Kinani AA. Pharmacological treatment strategies of pterygium: Drugs, biologics, and novel natural products. Drug Discov Today 2023; 28:103416. [PMID: 36280041 DOI: 10.1016/j.drudis.2022.103416] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 09/02/2022] [Accepted: 10/18/2022] [Indexed: 02/02/2023]
Abstract
Pterygium is a fibrovascular tissue growth invading the cornea. Adjunctive treatment post-surgery includes conventional immunosuppressants as well as antiviral drugs. The use of large- and small-molecule antivascular endothelial growth factor (VEGF) agents remains an integral part of pterygium treatment as well as other neovascular conditions of the eye. Naturally occurring polyphenolic compounds have favorable characteristics for treating neovascular and inflammatory eye conditions, including good efficacy, stability, cost-effectiveness, and the versatility of their chemical synthesis. In this review, we discuss pharmacological treatments of pterygium. Natural products, such curcumin, ellagic acid, and chalcones, are reviewed, with emphasis on their potential as future pterygium treatments.
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Affiliation(s)
- Sanaz Sadig Baheran
- Drug Discovery, Delivery and Patient Care Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames KT1 2EE, UK
| | - Raid G Alany
- Drug Discovery, Delivery and Patient Care Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames KT1 2EE, UK; School of Pharmacy, The University of Auckland, Auckland 1023, New Zealand
| | - Sianne Schwikkard
- Drug Discovery, Delivery and Patient Care Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames KT1 2EE, UK
| | - Wisam Muen
- Royal Eye Unit, Kingston NHS Foundation Trust, Kingston upon Thames KT2 7BE, UK
| | - Lena Namaan Salman
- Drug Discovery, Delivery and Patient Care Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames KT1 2EE, UK
| | - Nicholas Freestone
- Drug Discovery, Delivery and Patient Care Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames KT1 2EE, UK
| | - Ali A Al-Kinani
- Drug Discovery, Delivery and Patient Care Research Group, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames KT1 2EE, UK.
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Zang S, Chen Y, Guo H, Zhang M, Zhang G, Zhang L, Zhang L, Liu Q, Zeng J, Lo CH, Cui Y, Meng Q. High HDL-C and high LDL-C are risk factors of pterygium in a population-based cross-sectional study in Southern China: the Dongguan Eye Study. BMJ Open 2022; 12:e058649. [PMID: 36691254 PMCID: PMC9171277 DOI: 10.1136/bmjopen-2021-058649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 05/12/2022] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVES To investigate the relationship between serum lipids and pterygium in a large-scale rural population aged 40 years or older from Southern China. STUDY DESIGN The Dongguan Eye Study was a cross-sectional population-based study from September 2011 to February 2012. SETTING The area was set in the rural area of Dongguan, Southern China. PARTICIPANTS Adult rural population aged 40 or older. METHODS Participants underwent physical, haematological and ophthalmic examinations. PRIMARY AND SECONDARY OUTCOME MEASURES The frequency and risk factors of pterygium. RESULTS A total of 11 357 participants were eligible for inclusion and 8952 (78.8%) participants were enrolled for the systemic and ophthalmic examinations. The prevalence of pterygium was 17.3% after adjusting the sex and age distribution, 22.0% in participants with hypercholesterolaemia (total cholesterol ≥6.22 mmol/L (240 mg/dL)) and 21.8% in those with low-density lipoprotein-cholesterol (LDL-C) ≥4.14 mmol/L (160 mg/dL), respectively. After adjusting for multiple confounding factors, higher level of high-density lipoprotein-cholesterol (HDL-C) (OR: 1.23, 95% CI: 1.06 to 1.41) and LDL-C (OR: 1.13, 95% CI: 1.06 to 1.20) were positively associated with the risk of pterygium. The ORs for HDL-C or LDL-C with pterygium were significantly greater in participants aged 40-49 years than those aged 50 years or above (P for interaction <0.001). Furthermore, increased HDL-C showed greater association with pterygium in normal body mass index (BMI) group compared with overweight group (P for interaction=0.002). CONCLUSION Increased HDL-C and LDL-C are risk factors of pterygium, especially in people <50 years or those with normal BMI level. Strict control of HDL-C and LDL-C may be a new prevention method in reducing the risk of pterygium.
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Affiliation(s)
- Siwen Zang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Yanlei Chen
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Haike Guo
- Department of Ophthalmology, Shanghai Peace Eye Hospital, Shanghai, China
| | - Min Zhang
- Department of Ophthalmology, Dongguan People's Hospital, Dongguan, Guangdong, China
| | - Guanrong Zhang
- Statistics Section, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Lixin Zhang
- Department of Ophthalmology, Hengli Hospital, Dongguan, Guangdong, China
| | - Liang Zhang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Qingyang Liu
- Department of Ophthalmology, Dongguan People's Hospital, Dongguan, Guangdong, China
| | - Jin Zeng
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Chun-Han Lo
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Ying Cui
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Qianli Meng
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
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Rezaei M, Hassanzadeh Nemati N, Mehrabani D, Komeili A. Characterization of sodium carboxymethyl cellulose/calcium alginate scaffold loaded with curcumin in skin tissue engineering. J Appl Polym Sci 2022. [DOI: 10.1002/app.52271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mohadeseh Rezaei
- Department of Biomedical Engineering, Science and Research Branch Islamic Azad University Tehran Iran
| | - Nahid Hassanzadeh Nemati
- Department of Biomedical Engineering, Science and Research Branch Islamic Azad University Tehran Iran
| | - Davood Mehrabani
- Stem Cell Technology Research Center Shiraz University of Medical Sciences Shiraz Iran
- Burn and Wound Healing Research Center Shiraz University of Medical Sciences Shiraz Iran
- Center of Comparative and Experimental Medicine Shiraz University of Medical Sciences Shiraz Iran
- Li Ka Shing Center for Health Research and Innovation University of Alberta Edmonton Canada
| | - Ali Komeili
- Applied Biophotonics Research Center Science and Research Branch, Islamic Azad University Tehran Iran
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Caban M, Lewandowska U. Inhibiting effects of polyphenols on angiogenesis and epithelial-mesenchymal transition in anterior segment eye diseases. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Li J, An Y, Wang JN, Yin XP, Zhou H, Wang YS. Curcumin targets vascular endothelial growth factor via activating the PI3K/Akt signaling pathway and improves brain hypoxic-ischemic injury in neonatal rats. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2020; 24:423-431. [PMID: 32830149 PMCID: PMC7445479 DOI: 10.4196/kjpp.2020.24.5.423] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 01/06/2023]
Abstract
This study aimed to evaluate the effect of curcumin on brain hypoxic-ischemic (HI) damage in neonatal rats and whether the phosphoinositide 3-kinase (PI3K)/Akt/vascular endothelial growth factor (VEGF) signaling pathway is involved. Brain HI damage models were established in neonatal rats, which received the following treatments: curcumin by intraperitoneal injection before injury, insulin-like growth factor 1 (IGF-1) by subcutaneous injection after injury, and VEGF by intracerebroventricular injection after injury. This was followed by neurological evaluation, hemodynamic measurements, histopathological assessment, TUNEL assay, flow cytometry, and western blotting to assess the expression of p-PI3K, PI3K, p-Akt, Akt, and VEGF. Compared with rats that underwent sham operation, rats with brain HI damage showed remarkably increased neurological deficits, reduced right blood flow volume, elevated blood viscosity and haematocrit, and aggravated cell damage and apoptosis; these injuries were significantly improved by curcumin pretreatment. Meanwhile, brain HI damage induced the overexpression of p-PI3K, p-Akt, and VEGF, while curcumin pretreatment inhibited the expression of these proteins. In addition, IGF-1 treatment rescued the curcumin-induced down-regulated expression of p-PI3K, p-Akt, and VEGF, and VEGF overexpression counteracted the inhibitory effect of curcumin on brain HI damage. Overall, pretreatment with curcumin protected against brain HI damage by targeting VEGF via the PI3K/Akt signaling pathway in neonatal rats.
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Affiliation(s)
- Jia Li
- Department of Otolaryngology Head and Neck Surgery, The Second Hospital of Baoding, Baoding 071000, China
| | - Yan An
- Department of Obstetrics, Affiliated Hospital of Hebei University, Baoding 071000, China
| | - Jia-Ning Wang
- Department of Radiology, Affiliated Hospital of Hebei University, Baoding 071000, China
| | - Xiao-Ping Yin
- Department of Radiology, Affiliated Hospital of Hebei University, Baoding 071000, China
| | - Huan Zhou
- Department of Radiology, Affiliated Hospital of Hebei University, Baoding 071000, China
| | - Yong-Sheng Wang
- Department of MR Room, Qingyuan District People''s Hospital, Baoding 071000, China
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Han YF, Liu Z, Wang B, Zhu W, Li JZ, Qi YQ, Li XJ, Xu YY, Dou XX, Mu GY. Semaphorin 7a participants in pterygium by regulating vascular endothelial growth factor. Int J Ophthalmol 2019; 12:892-897. [PMID: 31236342 DOI: 10.18240/ijo.2019.06.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 01/03/2019] [Indexed: 11/23/2022] Open
Abstract
AIM To investigate the relationship between semaphorin 7a expression and cell proliferation and migration in pterygium fibroblasts. METHODS Twenty-six patients with surgically diagnosed pterygium were enrolled, including 15 cases of primary pterygium and 11 cases of recurrent pterygium. In addition, 12 cases of normal conjunctival tissue were collected. The expression of semaphorin 7a in normal conjunctival tissue, primary pterygium and recurrent pterygium was detected by real-time polymerase chain reaction. Recurrent pterygium fibroblasts were isolated and cultured, and the expression of semaphorin 7a was silenced by small interfering RNA (siRNA) interference technique. Furthermore, the effects of si-semaphorin 7a interference on the mRNA and protein levels of β1-integrin, vascular endothelial growth factor A (VEGFA) and vascular endothelial growth factor receptor (VEGFR), and on fibroblast proliferation were analyzed. Transwell assay was used to detect the effect of semaphorin 7a interference on fibroblast migration. RESULTS Semaphorin 7a was highly expressed in the primary pterygium and recurrent pterygium samples than that of the normal conjunctival tissue. Compared with the primary pterygium, the expression of semaphoring 7a in the recurrent pterygium samples was significantly increased (P<0.05). The mRNA and protein expression levels of β1-integrin, VEGFA and VEGFR were decreased after si-semaphorin 7a transfection, and as well as the cell proliferation and migration. CONCLUSION Semaphorin 7a might play important roles in the pathogenesis of pterygium by affecting the expression of β1-integrin, VEGFA and VEGFR.
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Affiliation(s)
- Yun-Fei Han
- Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China.,Aier Eye Hospital Group, Hubin Aier Eye Hospital, Binzhou 256600, Shandong Province, China
| | - Zhen Liu
- Department of Ophthalmology, the Second People's Hospital of Liaocheng, Linqing 252600, Shandong Province, China
| | - Bang Wang
- Neonatal Intensive Care Unit, Binzhou Medical University Hospital, Binzhou 256600, Shandong Province, China
| | - Wei Zhu
- Department of Ophthalmology, Jinan Central Hospital Affiliated to Shandong University, Jinan 250013, Shandong Province, China
| | - Jing-Zhen Li
- Aier Eye Hospital Group, Hubin Aier Eye Hospital, Binzhou 256600, Shandong Province, China
| | - Yue-Qin Qi
- Aier Eye Hospital Group, Hubin Aier Eye Hospital, Binzhou 256600, Shandong Province, China
| | - Xiao-Jing Li
- Aier Eye Hospital Group, Hubin Aier Eye Hospital, Binzhou 256600, Shandong Province, China
| | - Yan-Yun Xu
- Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China
| | - Xiao-Xiao Dou
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Zhejiang University College of Medicine, Hangzhou 310009, Zhejiang Province, China
| | - Guo-Ying Mu
- Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China
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Zhang J, Wang Y, Bao C, Liu T, Li S, Huang J, Wan Y, Li J. Curcumin‑loaded PEG‑PDLLA nanoparticles for attenuating palmitate‑induced oxidative stress and cardiomyocyte apoptosis through AMPK pathway. Int J Mol Med 2019; 44:672-682. [PMID: 31173176 PMCID: PMC6605976 DOI: 10.3892/ijmm.2019.4228] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 06/04/2019] [Indexed: 12/20/2022] Open
Abstract
Curcumin (CUR) has the ability to attenuate oxidative stress in the myocardium and to protect the myocardium from lipotoxic injury owing to its lipid-reducing properties. However, the use of CUR is limited due to its hydrophobicity and instability. In this study, CUR-loaded nanoparticles (CUR NPs) were developed using an amphiphilic copolymer, monomethoxy poly (ethylene glycol)-b-poly (DL-lactide), as a vehicle material. CUR NPs with high drug loading and small size were prepared under optimized conditions. The effects of CUR NPs on palmitate-induced cardiomyocyte injury were investigated and the possible protective mechanism of CUR NPs was also examined. It was found that CUR NPs were able to control the release of CUR and to deliver CUR to H9C2 cells, and they could prevent palmitate-treated H9C2 cells from apoptosis. In addition, CUR NPs could regulate the Bax and Bcl-2 levels of palmitate-treated H9C2 cells back to their respective normal levels. A prospective mechanism for the function of CUR NPs is that they may activate the AMP-activated protein kinase (AMPK)/mammalian target of rapamycin complex-1/p-p70 ribosomal protein S6 kinase signaling pathway, regulate the expression of downstream proteins and resist the palmitate-induced cardiomyocyte injury. Results suggest that CUR NPs can attenuate palmitate-induced oxidative stress in cardiomyocytes and protect cardiomyocytes from apoptosis through the AMPK pathway. In view of the safety and efficiency of these CUR NPs, they have potential for application in protecting the myocardium from lipotoxic injury.
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Affiliation(s)
- Jingyi Zhang
- Hubei Province Key Laboratory on Cardiovascular, Cerebrovascular and Metabolic Disorders, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Ying Wang
- Changchun People's Hospital, Changchun, Jilin 130021, P.R. China
| | - Cuiyu Bao
- Hubei Province Key Laboratory on Cardiovascular, Cerebrovascular and Metabolic Disorders, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Tao Liu
- Hubei Province Key Laboratory on Cardiovascular, Cerebrovascular and Metabolic Disorders, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Shuai Li
- Hubei Province Key Laboratory on Cardiovascular, Cerebrovascular and Metabolic Disorders, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Jiaxi Huang
- Hubei Province Key Laboratory on Cardiovascular, Cerebrovascular and Metabolic Disorders, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Ying Wan
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P.R. China
| | - Jing Li
- Hubei Province Key Laboratory on Cardiovascular, Cerebrovascular and Metabolic Disorders, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
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Zhang YK, Li JM, Qin L. Suppression of corneal neovascularization by curcumin via inhibition of Wnt/β-catenin pathway activation. Int J Ophthalmol 2017; 10:1791-1797. [PMID: 29259894 DOI: 10.18240/ijo.2017.12.01] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 11/09/2016] [Indexed: 12/22/2022] Open
Abstract
AIM To investigate whether curcumin suppressed corneal neovascularization (CNV) formation via inhibiting activation of Wnt/β-catenin pathway. METHODS Suture-induced CNV was established on Sprague-Dawley (SD) rats. Curcumin were daily administrated by subconjunctival injection. Phosphorylation of low-density lipoprotein receptor-related protein 6 (LRP6) and nuclear accumulation of β-catenin, two indicators of activated Wnt/β-catenin pathway, were determined by Western-blot analysis in subconfluent/proliferating human microvascular endothelial cells (HMEC) and neovascularized corneas. Wnt3a conditioned medium (WCM) were harvested from Wnt3a expressing cells. WCM-induced cell proliferation and endothelial tubular formation capacity was measured by MTT assay and Matrigel assay, respectively. RESULTS Phosphorylation of LRP6 and nuclear accumulation of β-catenin was significantly increased in subconfluent/proliferating endothelial cells. Activation of Wnt/β-catenin pathway by WCM markedly promotes HMEC proliferation and tubular formation. Curcumin inhibited LRP6 phosphorylation and nuclear accumulation of β-catenin. In addition, curcumin attenuated WCM-induced HMEC proliferation and disrupted tubular structure of endothelial cells on Matrigel. Meanwhile curcumin suppressed suture-induced CNV and inhibited LRP6 phosphorylation as well as β-catenin accumulation in SD rats. CONCLUSION Taken together, activation of Wnt/β-catenin pathway could be involved in endothelial proliferation during suture-induced CNV formation and curcumin attenuated CNV formation via inhibition of Wnt/β-catenin pathway activation.
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Affiliation(s)
- Yong-Kang Zhang
- Department of Ophthalmology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi Province, China.,Department of Ophthalmology, Shaanxi Kangfu Hospital, Xi'an 710065, Shaanxi Province, China
| | - Jing-Ming Li
- Department of Ophthalmology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi Province, China
| | - Li Qin
- Department of Ophthalmology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi Province, China
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