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Buonfiglio F, Pfeiffer N, Gericke A. Glaucoma and the ocular renin-angiotensin-aldosterone system: Update on molecular signalling and treatment perspectives. Cell Signal 2024; 122:111343. [PMID: 39127136 DOI: 10.1016/j.cellsig.2024.111343] [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: 06/30/2024] [Revised: 07/29/2024] [Accepted: 08/08/2024] [Indexed: 08/12/2024]
Abstract
Glaucoma, a leading cause of blindness worldwide, encompasses a group of pathological conditions affecting the optic nerve and is characterized by progressive retinal ganglion cell loss, cupping of the optic nerve head, and distinct visual field defects. While elevated intraocular pressure (IOP) is the main risk factor for glaucoma, many patients do not have elevated IOP. Consequently, other risk factors, such as ocular blood flow abnormalities and immunological factors, have been implicated in its pathophysiology. Traditional therapeutic strategies primarily aim to reduce IOP, but there is growing interest in developing novel treatment approaches to improve disease management and reduce the high rates of severe visual impairment. In this context, targeting the ocular renin-angiotensin-aldosterone system (RAAS) has been found as a potential curative strategy. The RAAS contributes to glaucoma development through key effectors such as prorenin, angiotensin II, and aldosterone. Recent evidence has highlighted the potential of using RAAS modulators to combat glaucoma, yielding encouraging results. Our study aims to explore the molecular pathways linking the ocular RAAS and glaucoma, summarizing recent advances that elucidate the role of the RAAS in triggering oxidative stress, inflammation, and remodelling in the pathogenesis of glaucoma. Additionally, we will present emerging therapeutic approaches that utilize RAAS modulators and antioxidants to slow the progression of glaucoma.
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Affiliation(s)
- Francesco Buonfiglio
- Departments of Ophthalmology, University Medical Center of the Johannes Gutenberg- University, Langenbeckstr.1, 55131 Mainz, Germany.
| | - Norbert Pfeiffer
- Departments of Ophthalmology, University Medical Center of the Johannes Gutenberg- University, Langenbeckstr.1, 55131 Mainz, Germany.
| | - Adrian Gericke
- Departments of Ophthalmology, University Medical Center of the Johannes Gutenberg- University, Langenbeckstr.1, 55131 Mainz, Germany.
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Pop D, Dădârlat-Pop A, Tomoaia R, Zdrenghea D, Caloian B. Updates on the Renin-Angiotensin-Aldosterone System and the Cardiovascular Continuum. Biomedicines 2024; 12:1582. [PMID: 39062156 PMCID: PMC11274767 DOI: 10.3390/biomedicines12071582] [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: 05/30/2024] [Revised: 07/03/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024] Open
Abstract
The cardiovascular continuum describes how several cardiovascular risk factors contribute to the development of atherothrombosis, ischemic heart disease, and peripheral arteriopathy, leading to cardiac and renal failure and ultimately death. Due to its multiple valences, the renin-angiotensin-aldosterone system plays an important role in all stages of the cardiovascular continuum, starting from a cluster of cardiovascular risk factors, and continuing with the development of atherosclerosis thorough various mechanisms, and culminating with heart failure. Therefore, this article aims to analyze how certain components of the renin-angiotensin-aldosterone system (converting enzymes, angiotensin, angiotensin receptors, and aldosterone) are involved in the underlying pathophysiology of the cardiovascular continuum and the possible arrest of its progression.
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Affiliation(s)
- Dana Pop
- 4th Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania; (D.P.); (R.T.); (D.Z.); (B.C.)
- Cardiology Department, Rehabilitation Hospital, 400012 Cluj-Napoca, Romania
| | - Alexandra Dădârlat-Pop
- 4th Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania; (D.P.); (R.T.); (D.Z.); (B.C.)
- Cardiology Department, Heart Institute “N. Stăncioiu”, 400001 Cluj-Napoca, Romania
| | - Raluca Tomoaia
- 4th Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania; (D.P.); (R.T.); (D.Z.); (B.C.)
- Cardiology Department, Rehabilitation Hospital, 400012 Cluj-Napoca, Romania
| | - Dumitru Zdrenghea
- 4th Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania; (D.P.); (R.T.); (D.Z.); (B.C.)
| | - Bogdan Caloian
- 4th Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania; (D.P.); (R.T.); (D.Z.); (B.C.)
- Cardiology Department, Rehabilitation Hospital, 400012 Cluj-Napoca, Romania
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Kopp W. Aging and "Age-Related" Diseases - What Is the Relation? Aging Dis 2024:AD.2024.0570. [PMID: 39012663 DOI: 10.14336/ad.2024.0570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 06/28/2024] [Indexed: 07/17/2024] Open
Abstract
The study explores the intricate relationship between aging and the development of noncommunicable diseases [NCDs], focusing on whether these diseases are inevitable consequences of aging or primarily driven by lifestyle factors. By examining epidemiological data, particularly from hunter-gatherer societies, the study highlights that many NCDs prevalent in modern populations are rare in these societies, suggesting a significant influence of lifestyle choices. It delves into the mechanisms through which poor diet, smoking, and other lifestyle factors contribute to systemic physiological imbalances, characterized by oxidative stress, insulin resistance and hyperinsulinemia, and dysregulation of the sympathetic nervous system, the renin-angiotensin-aldosterone system, and the immune system. The interplay between this pattern and individual factors such as genetic susceptibility, biological variability, epigenetic changes and the microbiome is proposed to play a crucial role in the development of a range of age-related NCDs. Modified biomolecules such as oxysterols and advanced glycation end products also contribute to their development. Specific diseases such as benign prostatic hyperplasia, Parkinson's disease, glaucoma and osteoarthritis are analyzed to illustrate these mechanisms. The study concludes that while aging contributes to the risk of NCDs, lifestyle factors play a crucial role, offering potential avenues for prevention and intervention through healthier living practices. One possible approach could be to try to restore the physiological balance, e.g. through dietary measures [e.g. Mediterranean diet, Okinawan diet or Paleolithic diet] in conjunction with [a combination of] pharmacological interventions and other lifestyle changes.
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Li X, Fu YH, Tong XW, Zhang YT, Shan YY, Xu YX, Pu SD, Gao XY. RAAS in diabetic retinopathy: mechanisms and therapies. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2024; 68:e230292. [PMID: 38652701 PMCID: PMC11081058 DOI: 10.20945/2359-4292-2023-0292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/23/2023] [Indexed: 04/25/2024]
Abstract
Diabetic retinopathy (DR) is a complication of diabetes with a complex pathophysiology and multiple factors involved. Recently, it has been found that the upregulation of the renin-angiotensin-aldosterone system (RAAS) leads to overexpression of angiotensin II (Ang II), which induces oxidative stress, inflammation, and angiogenesis in the retina. Therefore, RAAS may be a promising therapeutic target in DR. Notably, RAAS inhibitors are often used in the treatment of hypertension. Still, the potential role and mechanism of DR must be further studied. In this review, we discuss and summarize the pathology and potential therapeutic goals of RAAS in DR.
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Affiliation(s)
- Xin Li
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China
| | - Yu-Hong Fu
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China
| | - Xue-Wei Tong
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China
| | - Yi-Tong Zhang
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China
| | - Yong-Yan Shan
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China
| | - Yu-Xin Xu
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China
| | - Sheng-Dan Pu
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China
| | - Xin-Yuan Gao
- First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Department of Endocrinology, Harbin, China,
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Padovani-Claudio DA, Ramos CJ, Capozzi ME, Penn JS. Elucidating glial responses to products of diabetes-associated systemic dyshomeostasis. Prog Retin Eye Res 2023; 94:101151. [PMID: 37028118 PMCID: PMC10683564 DOI: 10.1016/j.preteyeres.2022.101151] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 04/08/2023]
Abstract
Diabetic retinopathy (DR) is a leading cause of blindness in working age adults. DR has non-proliferative stages, characterized in part by retinal neuroinflammation and ischemia, and proliferative stages, characterized by retinal angiogenesis. Several systemic factors, including poor glycemic control, hypertension, and hyperlipidemia, increase the risk of DR progression to vision-threatening stages. Identification of cellular or molecular targets in early DR events could allow more prompt interventions pre-empting DR progression to vision-threatening stages. Glia mediate homeostasis and repair. They contribute to immune surveillance and defense, cytokine and growth factor production and secretion, ion and neurotransmitter balance, neuroprotection, and, potentially, regeneration. Therefore, it is likely that glia orchestrate events throughout the development and progression of retinopathy. Understanding glial responses to products of diabetes-associated systemic dyshomeostasis may reveal novel insights into the pathophysiology of DR and guide the development of novel therapies for this potentially blinding condition. In this article, first, we review normal glial functions and their putative roles in the development of DR. We then describe glial transcriptome alterations in response to systemic circulating factors that are upregulated in patients with diabetes and diabetes-related comorbidities; namely glucose in hyperglycemia, angiotensin II in hypertension, and the free fatty acid palmitic acid in hyperlipidemia. Finally, we discuss potential benefits and challenges associated with studying glia as targets of DR therapeutic interventions. In vitro stimulation of glia with glucose, angiotensin II and palmitic acid suggests that: 1) astrocytes may be more responsive than other glia to these products of systemic dyshomeostasis; 2) the effects of hyperglycemia on glia are likely to be largely osmotic; 3) fatty acid accumulation may compound DR pathophysiology by promoting predominantly proinflammatory and proangiogenic transcriptional alterations of macro and microglia; and 4) cell-targeted therapies may offer safer and more effective avenues for DR treatment as they may circumvent the complication of pleiotropism in retinal cell responses. Although several molecules previously implicated in DR pathophysiology are validated in this review, some less explored molecules emerge as potential therapeutic targets. Whereas much is known regarding glial cell activation, future studies characterizing the role of glia in DR and how their activation is regulated and sustained (independently or as part of retinal cell networks) may help elucidate mechanisms of DR pathogenesis and identify novel drug targets for this blinding disease.
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Affiliation(s)
- Dolly Ann Padovani-Claudio
- Department of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, B3321A Medical Center North, 1161 21st Avenue South, Nashville, TN, 37232-0011, USA.
| | - Carla J Ramos
- Department of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, AA1324 Medical Center North, 1161 21st Avenue South, Nashville, TN, 37232-0011, USA.
| | - Megan E Capozzi
- Duke Molecular Physiology Institute, Duke University School of Medicine, 300 North Duke Street, Durham, NC, 27701, USA.
| | - John S Penn
- Department of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, B3307 Medical Center North, 1161 21st Avenue South, Nashville, TN, 37232-0011, USA.
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Oh SE, Kim JH, Shin HJ, Kim SA, Park CK, Park HYL. Angiotensin II-Related Activation of Scleral Fibroblasts and Their Role on Retinal Ganglion Cell Death in Glaucoma. Pharmaceuticals (Basel) 2023; 16:ph16040556. [PMID: 37111313 PMCID: PMC10142824 DOI: 10.3390/ph16040556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/31/2023] [Accepted: 04/05/2023] [Indexed: 04/08/2023] Open
Abstract
We identify the angiotensin II (AngII)-associated changes in the extracellular matrix (ECM) and the biomechanical properties of the sclera after systemic hypotension. Systemic hypotension was induced by administering oral hydrochlorothiazide. AngII receptor levels and ECM components in the sclera and biomechanical properties were evaluated based on the stress–strain relationship after systemic hypotension. The effect of inhibiting the AngII receptor with losartan was determined in the systemic hypotensive animal model and the cultured scleral fibroblasts from this model. The effect of losartan on retinal ganglion cell (RGC) death was evaluated in the retina. Both AngII receptor type I (AT-1R) and type II (AT-2R) increased in the sclera after systemic hypotension. Proteins related to the activation of fibroblasts (transforming growth factor [TGF]-β1 and TGF-β2) indicated that transformation to myofibroblasts (α smooth muscle actin [SMA]), and the major ECM protein (collagen type I) increased in the sclera after systemic hypotension. These changes were associated with stiffening of the sclera in the biomechanical analysis. Administering losartan in the sub-Tenon tissue significantly decreased the expression of AT-1R, αSMA, TGF-β, and collagen type I in the cultured scleral fibroblasts and the sclera of systemic hypotensive rats. The sclera became less stiff after the losartan treatment. A significant increase in the number of RGCs and decrease in glial cell activation was found in the retina after the losartan treatment. These findings suggest that AngII plays a role in scleral fibrosis after systemic hypotension and that inhibiting AngII could modulate the tissue properties of the sclera, resulting in the protection of RGCs.
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Affiliation(s)
- Si-Eun Oh
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jie-Hyun Kim
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Hee-Jong Shin
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Seong-Ah Kim
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Chan-Kee Park
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Hae-Young Lopilly Park
- Department of Ophthalmology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
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Wen J, Liu D, Wu Q, Zhao L, Iao WC, Lin H. Retinal image‐based artificial intelligence in detecting and predicting kidney diseases: Current advances and future perspectives. VIEW 2023. [DOI: 10.1002/viw.20220070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023] Open
Affiliation(s)
- Jingyi Wen
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic CenterSun Yat‐sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Disease GuangzhouChina
| | - Dong Liu
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic CenterSun Yat‐sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Disease GuangzhouChina
| | - Qianni Wu
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic CenterSun Yat‐sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Disease GuangzhouChina
| | - Lanqin Zhao
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic CenterSun Yat‐sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Disease GuangzhouChina
| | - Wai Cheng Iao
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic CenterSun Yat‐sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Disease GuangzhouChina
| | - Haotian Lin
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic CenterSun Yat‐sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Disease GuangzhouChina
- Center for Precision Medicine and Department of Genetics and Biomedical Informatics Zhongshan School of Medicine Sun Yat‐sen University Guangzhou China
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Higashide T, Hirooka K, Kometani M, Sugiyama K. Aldosterone as a Possible Contributor to Eye Diseases. Endocrinology 2022; 164:6868238. [PMID: 36461718 DOI: 10.1210/endocr/bqac201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/10/2022] [Accepted: 11/29/2022] [Indexed: 12/07/2022]
Abstract
Aldosterone, an effector molecule of the renin-angiotensin-aldosterone system (RAAS), has been receiving more attention in the field of ophthalmology because of its possible role in the pathogenesis of various eye diseases or abnormalities; it may even become a target for their treatment. Primary aldosteronism, a typical model of a systemic aldosterone excess, may cause vision loss due to various ocular diseases, such as retinal vein occlusion, central serous chorioretinopathy, and, possibly glaucoma. RAAS components are present in various parts and types of cells present in the eye. Investigations of the local RAAS in various animal models of diabetic macular edema, retinal vein occlusion, retinopathy of prematurity, central serous chorioretinopathy, and glaucoma have found evidence that aldosterone or mineralocorticoid receptors may exacerbate the pathology of these disorders. Further studies are needed to elucidate whether the modulation of aldosterone or mineralocorticoid receptors is an effective treatment for preventing vision loss in patients with eye diseases.
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Affiliation(s)
- Tomomi Higashide
- Department of Ophthalmology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kazuyuki Hirooka
- Ophthalmology and Visual Science, Graduate School of Biomedical Science, Hiroshima University, Hiroshima, Japan
| | - Mitsuhiro Kometani
- Department of Health Promotion and Medicine of the Future, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kazuhisa Sugiyama
- Department of Ophthalmology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
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Kurysheva NI, Pererva OA, Nikitina AD. Eye damage in COVID-19. Part 1: Involvement of the eye in SARS-CoV-2 virus transmission and anterior segment complications. RUSSIAN OPHTHALMOLOGICAL JOURNAL 2022. [DOI: 10.21516/2072-0076-2022-15-4-156-165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In COVID-19, eye damage may develop at any stage of the disease. Viral ribonucleic acid has been found in ocular tissues, but the role of the eye as a route of infection is yet to be substantiated. Ophthalmic manifestations may be a typical feature of COVID-19 infection or they may develop several weeks after recovery. Ophthalmologists should be aware of possible relationships of an ophthalmic pathology with SARS-CoV-2 in order to obtain targeted case history, detect the specific signs, prescribe the necessary tests and thereby reduce the spread of the infection. These relationships are also important for early diagnosis and treatment of complications that threaten the patients’ life and vision. The first part of the review focuses on the possible involvement of the eye in SARS-CoV-2 infection and the spread of infection. Clinical manifestations of the anterior segment damage are considered.
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Affiliation(s)
- N. I. Kurysheva
- Medical Biological University of Innovations and Continuing Education — A.I. Burnazyan Medical Biophysical Center; Ophthalmological Center, Federal Medical and Biological Agency
| | - O. A. Pererva
- Medical Biological University of Innovations and Continuing Education — A.I. Burnazyan Medical Biophysical Center; Ophthalmological Center, Federal Medical and Biological Agency
| | - A. D. Nikitina
- Medical Biological University of Innovations and Continuing Education — A.I. Burnazyan Medical Biophysical Center; Ophthalmological Center, Federal Medical and Biological Agency
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Dong Y, Fu Y, Qian X, Lin L, Yuan Y, Li Y, Shao W, Gao Q. Optic nerve head astrocytes contribute to vascular associated effects. Front Med (Lausanne) 2022; 9:943986. [PMID: 35957853 PMCID: PMC9362728 DOI: 10.3389/fmed.2022.943986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 06/29/2022] [Indexed: 11/13/2022] Open
Abstract
PurposeThis study was conducted in order to test the expression of vasoactive substances within rat lamina cribrosa (LC) and optic nerve head (ONH) astrocytes, so as to investigate the role and potential mechanism of ONH astrocytes in vascular associated effects.MethodsLC tissue sections and primary cultured ONH astrocytes were obtained from adult Sprague-Dawley (SD) rats. Immunofluorescent staining was then used to detect the expression of vasoactive substances. Hyperoxia exposure was carried out both in vivo and in vitro, after which nitric oxide (NO) levels in LC tissue and cell supernatant were detected. The variations of protein and gene expression associated with vasoactive substances were subsequently tested. ONH astrocytes and vascular smooth muscle cells (VSMCs) were then incubated in a direct co-culture manner. Morphological parameters of VSMCs were finally analyzed in order to evaluate cell contraction.ResultsEndothelin-1 (ET-1), nitric oxide synthase (NOS) and renin-angiotensin system (RAS) were detected in both LC tissue and ONH astrocytes. Retinal vessel diameter was found obviously decreased following hyperoxia exposure. Moreover, hyperoxia inhibited NO production both in vivo and in vitro. ET-1 and RAS elements were observed to be upregulated, whereas NOS was downregulated. In ONH astrocytes and VSMCs co-culture system, the length-to-width ratio of VSMCs was shown to significantly increase on days 3 and 7 in hyperoxia compared with normoxia.ConclusionsThere is an abundance of expression of vasoactive substances within LC tissue and ONH astrocytes. The contractile response of VSMCs in the co-culture system provided direct evidence for the involvement of ONH astrocytes in vascular associated effects, which may signify a potentially novel direction for future research.
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Affiliation(s)
- Yanmin Dong
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yue Fu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Xiaobing Qian
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Leilei Lin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yongguang Yuan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yujie Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Wanwen Shao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Qianying Gao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
- *Correspondence: Qianying Gao
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Shang N, Bhullar KS, Wu J. Tripeptide IRW Protects MC3T3-E1 Cells against Ang II Stress in an AT2R Dependent Manner. Molecules 2022; 27:molecules27123684. [PMID: 35744810 PMCID: PMC9230126 DOI: 10.3390/molecules27123684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 05/31/2022] [Accepted: 06/07/2022] [Indexed: 11/16/2022] Open
Abstract
Multiple strategies including the use of bioactive peptides and other nutraceuticals are being adopted to maintain bone health. This study provides an improved and deeper understanding of the pharmacological effects that a bioactive peptide IRW (Ile-Arg-Trp) extends on bone health. Our results showed that IRW treatment protects osteoblasts against Ang II induced decline in cell proliferation and restores protein levels of collagen type I alpha 2 chain (COL1A2) and alkaline phosphatase (ALP) levels in MC3T3-E1 cells (p < 0.05). Apart from augmentation of these mineralization factors, the angiotensin II (Ang II) induced apoptotic stress in osteoblasts was mitigated by IRW as well. At the molecular level, IRW abolished the cytochrome-c release via modulation of pro-and anti-apoptotic genes in MC3T3-E1 cells (p < 0.05). Interestingly, IRW also increased cellular levels of cytoprotective local RAAS factors such as MasR, Ang (1−7), ACE2, and AT2R, and lowered the levels of Ang II effector receptor (AT1R). Further, our results indicated a lower content of inflammation and osteoclastogenesis biomarkers such as cyclooxygenase 2 (COX2), nuclear factor kappa B (NF-κB), and receptor activator of nuclear factor kappa-B ligand (RANKL) following IRW treatment in MC3T3-E1 cells (p < 0.05). The use of an antagonist-guided cell study indicated that IRW contributed to the process of cytoprotection and proliferation of osteoblasts via Runt-related transcription factor 2 (RUNX2) in face of Ang II stress in an AT2R dependent manner. The key findings of our study showed that IRW could potentially have a therapeutic role in the treatment and/or prevention of bone disorders.
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Affiliation(s)
- Nan Shang
- Department of Agricultural Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada; (N.S.); (K.S.B.)
- College of Engineering, China Agricultural University, Beijing 100083, China
| | - Khushwant S. Bhullar
- Department of Agricultural Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada; (N.S.); (K.S.B.)
| | - Jianping Wu
- Department of Agricultural Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada; (N.S.); (K.S.B.)
- Correspondence: ; Tel.: +1-780-492-6885; Fax: +1-780-492-8524
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12
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Pulgar VM, Cruz-Diaz N, Westwood BM, Chappell MC. Angiotensinogen uptake and stimulation of oxidative stress in human pigment retinal epithelial cells. Peptides 2022; 152:170770. [PMID: 35183655 DOI: 10.1016/j.peptides.2022.170770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 02/12/2022] [Accepted: 02/16/2022] [Indexed: 12/27/2022]
Abstract
We previously reported that isolated proximal tubules (PT) internalize the precursor protein angiotensinogen and that the 125Iodine-labeled protein accumulated in the nuclear and mitochondrial fractions of the PT cells; however, whether internalization of angiotensinogen occurs in non-renal epithelial cells is unknown. Therefore, the present study assessed the cellular uptake of 125I-angiotensinogen in human retinal pigment ARPE-19 epithelial cells, a widely utilized cell model for the assessment of retinal injury, inflammation and oxidative stress. ARPE-19 cells, maintained in serum-free media to remove extracellular sources of bovine serum angiotensinogen and renin, were incubated with 125Iodine-angiotensinogen at 37 °C and revealed the time-dependent uptake of angiotensinogen over 24 h. In contrast, incubation with labelled Ang II, Ang-(1-7) or Ang I revealed minimal cellular uptake. Subcellular fractionation following a 4-hour uptake of 125I-angiotensinogen revealed that the majority of the labeled protein localized to the nuclear fraction with lower accumulation in the mitochondrial and cytosolic fractions. Finally, we show that addition of angiotensinogen (2 nM) to the ARPE-19 cells increased oxidative stress as assessed by DCF fluorescence that was blocked by pretreatment of the cells with either the NADPH oxidase 1/4 inhibitor GKT137831, apocynin or atorvastatin, but not the AT1 receptor antagonist losartan. In contrast, treatment of the cells with Angiotensin II at an equivalent dose to angiotensinogen failed to stimulate oxidative stress. We conclude that human retinal pigment cells internalize angiotensinogen to elicit an increase in oxidative stress through a pathway that appears distinct from the Ang II-AT1 receptor axis.
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Affiliation(s)
- Victor M Pulgar
- Department of Pharmaceutical Sciences, Campbell University, Buies-Creek, NC, United States; Hypertension & Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC,United States
| | - Nildris Cruz-Diaz
- Hypertension & Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC,United States
| | - Brian M Westwood
- Hypertension & Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC,United States
| | - Mark C Chappell
- Hypertension & Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC,United States.
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13
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Lin X, Lin W, Zhuang Y, Gao F. ACE2 inhibits lipopolysaccharide-caused lung fibrosis via downregulating the TGF-β1/Smad2/Smad3 pathway. J Pharmacol Exp Ther 2022; 381:236-246. [DOI: 10.1124/jpet.121.000907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 03/04/2022] [Indexed: 11/22/2022] Open
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14
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Ocular Distribution of the Renin-Angiotensin-Aldosterone System in the Context of the SARS-CoV-2 Pandemic. J Renin Angiotensin Aldosterone Syst 2022; 2022:9970922. [PMID: 35173799 PMCID: PMC8831072 DOI: 10.1155/2022/9970922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 12/22/2021] [Indexed: 11/22/2022] Open
Abstract
The COVID-19 pandemic has resulted in an unprecedented impact on global health, economy, and way of life. SARS-CoV-2, the virus responsible for the disease, utilizes the ACE2 receptor found on host cells to mediate entry, replication, and infection. Numerous studies have elucidated the presence of many components of the renin-angiotensin-aldosterone system (RAAS) in the eye, including the ACE2 receptor. Considering this, and the anatomical vulnerability that the exposed ocular surface offers with its interconnectedness to the respiratory system, there is a theoretical risk of pathogen entry from the ocular route as well as the development of COVID-19-associated eye disease. Despite this, the actual epidemiological data demonstrates low ocular symptoms, possibly due to differing ACE2 receptor expression across age, ethnicity, and sex coupled with the protective properties of tears. We summarize the current literature on ocular RAAS with specific focus on the ACE2 receptor and its interplay with the SARS-CoV-2 virus.
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Shree J, Singh A, Choudhary R, Pandey DP, Bodakhe SH. Topical Administration of ACE Inhibitor Interrupts the Progression of Cataract in Two Kidney One Clip Induced Hypertensive Cataract Model. Curr Eye Res 2021; 47:399-408. [PMID: 34740310 DOI: 10.1080/02713683.2021.2002911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE Previously, we assessed that hypertension increases cataractogenesis. In the present study, we evaluated the effect of oral and topical administration of enalapril on two kidney one clip (2K1C)-induced hypertensive cataract model by evaluating the biochemical alteration of lenticular antioxidants, ionic content, ATPase activity, protein content and careful examination of the lenticular opacity. MATERIALS AND METHOD Animals were divided into normal and hypertensive animals. Hypertensive animals were divided into hypertensive control group (0.3% CMC), enalapril (oral) treatment group (20 mg/kg/day; p.o), and enalapril (topical) treatment group (0.1% w/v on the eye cornea) for a period of twelve weeks. During experimental study blood pressure, heart rate and morphology of the eyes were monitored biweekly. After twelve weeks, lenses were photographed and various catractogenic biochemical parameters were assessed. RESULTS Enalapril (oral) treatment conserved the blood pressure (systolic and diastolic), restored the level of antioxidants, restored the lipid peroxidation marker, nitrite content, ionic content, ATPase function, protein content, and thus delayed the cataract formation. While, enalapril (topical) treatment exhibited anti-cataract effect without affecting the systolic and diastolic blood pressure that could be by restoring the antioxidant level, maintaining the ionic balance, balancing the protein levels, and by inhibiting the upregulated ocular renin angiotensin system. The overall results suggest that enalapril (topical) treatment showed conspicuous effect than enalapril (oral) treatment in adjourning the cataract formation. CONCLUSION Based on the results, it may be concluded that upregulated ocular RAS by increasing oxidative stress and by misbalancing the lenticular ionic and protein content may lead to cataract formation in hypertensive condition.
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Affiliation(s)
- Jaya Shree
- Department of Pharmacology, Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Koni, Bilaspur, India.,Department of Pharmacology, Rungta Institute of Pharmaceutical Sciences and Research, Rungta Group of Colleges, Bhilai, India
| | - Amrita Singh
- Department of Pharmacology, Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Koni, Bilaspur, India.,Department of Pharmacology, Isf College of Pharmacy Moga, IK Gujral Punjab Technical University, Jalandhar, India
| | - Rajesh Choudhary
- Department of Pharmacology, Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Koni, Bilaspur, India.,Department of Pharmacology, Shri Shankaracharya College of Pharmaceutical Sciences, Shri Shankaracharya Technical Campus, Bhilai, India
| | | | - Surendra H Bodakhe
- Department of Pharmacology, Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Koni, Bilaspur, India
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16
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Othman R, Cagnone G, Joyal JS, Vaucher E, Couture R. Kinins and Their Receptors as Potential Therapeutic Targets in Retinal Pathologies. Cells 2021; 10:1913. [PMID: 34440682 PMCID: PMC8391508 DOI: 10.3390/cells10081913] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/23/2021] [Accepted: 07/24/2021] [Indexed: 12/29/2022] Open
Abstract
The kallikrein-kinin system (KKS) contributes to retinal inflammation and neovascularization, notably in diabetic retinopathy (DR) and neovascular age-related macular degeneration (AMD). Bradykinin type 1 (B1R) and type 2 (B2R) receptors are G-protein-coupled receptors that sense and mediate the effects of kinins. While B2R is constitutively expressed and regulates a plethora of physiological processes, B1R is almost undetectable under physiological conditions and contributes to pathological inflammation. Several KKS components (kininogens, tissue and plasma kallikreins, and kinin receptors) are overexpressed in human and animal models of retinal diseases, and their inhibition, particularly B1R, reduces inflammation and pathological neovascularization. In this review, we provide an overview of the KKS with emphasis on kinin receptors in the healthy retina and their detrimental roles in DR and AMD. We highlight the crosstalk between the KKS and the renin-angiotensin system (RAS), which is known to be detrimental in ocular pathologies. Targeting the KKS, particularly the B1R, is a promising therapy in retinal diseases, and B1R may represent an effector of the detrimental effects of RAS (Ang II-AT1R).
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Affiliation(s)
- Rahmeh Othman
- School of Optometry, Université de Montréal, Montreal, QC H3T 1P1, Canada
- Department of Pharmacology and Physiology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
| | - Gael Cagnone
- Department of Pediatry, Faculty of Medicine, CHU St Justine, Université de Montréal, Montreal, QC H3T 1J4, Canada; (G.C.); (J.-S.J.)
| | - Jean-Sébastien Joyal
- Department of Pediatry, Faculty of Medicine, CHU St Justine, Université de Montréal, Montreal, QC H3T 1J4, Canada; (G.C.); (J.-S.J.)
| | - Elvire Vaucher
- School of Optometry, Université de Montréal, Montreal, QC H3T 1P1, Canada
| | - Réjean Couture
- Department of Pharmacology and Physiology, Faculty of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada
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17
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Mavi Yildiz A, Ucan Gunduz G, Yalcinbayir O, Acet Ozturk NA, Avci R, Coskun F. SD-OCT assessment of macular and optic nerve alterations in patients recovered from COVID-19. Can J Ophthalmol 2021; 57:75-81. [PMID: 34303641 PMCID: PMC8255111 DOI: 10.1016/j.jcjo.2021.06.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/29/2021] [Accepted: 06/28/2021] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To quantify microstructutal alterations in the macula and peripapillary retinal nerve fibre layer (RNFL) in patients recovered from coronavirus disease 2019 (COVID-19) using spectral domain optic coherence tomography (SD-OCT). DESIGN Retrospective, observational. PARTICIPANTS This comparative, cross-sectional study included patients who recovered from COVID-19 (Group 1) and age- and sex-matched normal controls (Group 2). METHODS A comprehensive ophthalmic examination, including best-corrected visual acuity and biomicroscopic anterior and posterior segment examination was performed. SD-OCT analysis of the macula and peripapillary RNFL was obtained for each participant. In addition, patient demographics and comorbidities were recorded. RESULTS 238 eyes of 122 subjects (Group 1: n = 63; Group 2: n = 59) were included. The incidence of coexisting comorbidity was higher in Group 1 (n = 26/63, 41.3%) compared with Group 2 (n = 12/59, 20.3%) (p = 0.013). The central foveal thickness (CFT) was significantly higher in Group 1 (271.0±26.8 µm) than Group 2 (263.2±22.0 µm) (p = 0.015). The average outer nuclear layer (ONL) thickness at central fovea in Group 1 (85.4±13.3 µm) was significantly thicker than that in Group 2 (81.4±15.2 µm) (p = 0.035). The mean peripapillary RNFL thickness of Group 1 (102.6±8.8 µm) and Group 2 (100.9±8.3 µm) were similar (p = 0.145). The mean choroidal thickness of groups at the fovea and at 1500 µm nasal and temporal to the fovea were not significantly different (p > 0.05 for all). CONCLUSION Significant thickness alterations in individual retinal layers and CFT was detected in post-COVID-19 patients. The increase in CFT and ONL thickness might be attributed to direct infection or viral-induced inflammatory response of retina.
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Affiliation(s)
| | - Gamze Ucan Gunduz
- Bursa Uludag University School of Medicine, Department of Ophthalmology, Bursa, Turkey
| | - Ozgur Yalcinbayir
- Bursa Retina Eye Hospital, Department of Ophthalmology, Bursa, Turkey; Bursa Uludag University School of Medicine, Department of Ophthalmology, Bursa, Turkey
| | | | - Remzi Avci
- Bursa Retina Eye Hospital, Department of Ophthalmology, Bursa, Turkey
| | - Funda Coskun
- Bursa Uludag University School of Medicine, Department of Chest Diseases, Bursa, Turkey
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18
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Kaplan N, Gonzalez E, Peng H, Batlle D, Lavker RM. Emerging importance of ACE2 in external stratified epithelial tissues. Mol Cell Endocrinol 2021; 529:111260. [PMID: 33781838 PMCID: PMC7997854 DOI: 10.1016/j.mce.2021.111260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/25/2020] [Accepted: 03/20/2021] [Indexed: 02/09/2023]
Abstract
Angiotensin converting enzyme 2 (ACE2), a component of the renin-angiotensin system (RAS), has been identified as the receptor for the SARS-CoV-2. Several RAS components including ACE2 and its substrate Ang II are present in both eye and skin, two stratified squamous epithelial tissues that isolate organisms from external environment. Our recent findings in cornea and others in both skin and eye suggest contribution of this system, and specifically of ACE2 in variety of physiological and pathological responses of these organ systems. This review will focus on the role RAS system plays in both skin and cornea, and will specifically discuss our recent findings on ACE2 in corneal epithelial inflammation, as well as potential implications of ACE2 in patients with COVID-19.
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Affiliation(s)
- Nihal Kaplan
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - Elena Gonzalez
- Department of Medicine (Nephrology and Hypertension), Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Han Peng
- Department of Dermatology, Northwestern University, Chicago, IL, USA.
| | - Daniel Batlle
- Department of Medicine (Nephrology and Hypertension), Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - Robert M Lavker
- Department of Dermatology, Northwestern University, Chicago, IL, USA.
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19
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Abstract
Recently, coronavirus disease 2019 (COVID-19) caused by SARS-CoV-2 has spread around the world and is receiving worldwide attention. Approximately 20% of infected patients are suffering from severe disease of multiple systems and in danger of death, while the ocular complications of SARS-CoV-2-infected patients have not been reported generally. Herein, we focus on two major receptors of SARS-CoV-2, ACE2 and CD147 (BSG), in human ocular cells, and interpret the potential roles of coronaviruses in human ocular tissues and diseases.
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Affiliation(s)
- Yan-Ping Li
- Laboratory for Stem Cell & Retinal Regeneration, The Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China
| | - Ya Ma
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Science Key Laboratory, Beijing 100730 China
| | - Ningli Wang
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Science Key Laboratory, Beijing 100730 China
| | - Zi-Bing Jin
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Science Key Laboratory, Beijing 100730 China.
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20
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Arthur G, Osborn JL, Yiannikouris FB. (Pro)renin receptor in the kidney: function and significance. Am J Physiol Regul Integr Comp Physiol 2021; 320:R377-R383. [PMID: 33470188 DOI: 10.1152/ajpregu.00259.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
(Pro)renin receptor (PRR), a 350-amino acid receptor initially thought of as a receptor for the binding of renin and prorenin, is multifunctional. In addition to its role in the renin-angiotensin system (RAS), PRR transduces several intracellular signaling molecules and is a component of the vacuolar H+-ATPase that participates in autophagy. PRR is found in the kidney and particularly in great abundance in the cortical collecting duct. In the kidney, PRR participates in water and salt balance, acid-base balance, and autophagy and plays a role in development and progression of hypertension, diabetic retinopathy, and kidney fibrosis. This review highlights the role of PRR in the development and function of the kidney, namely, the macula densa, podocyte, proximal and distal convoluted tubule, and the principal cells of the collecting duct, and focuses on PRR function in body fluid volume homeostasis, blood pressure regulation, and acid-base balance. This review also explores new advances in the molecular mechanism involving PRR in normal renal health and pathophysiological states.
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Affiliation(s)
- Gertrude Arthur
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky
| | - Jeffrey L Osborn
- Department of Biology, University of Kentucky, Lexington, Kentucky
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21
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Zor KR, Yıldırım Biçer G, Tutaş Günaydın N, Küçük E, Yılmaz U. Can the coronavirus disease 2019 (COVID-19) cause choroiditis and optic neuropathy? EUR J INFLAMM 2021. [DOI: 10.1177/20587392211059060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objectives: We aim to investigate the involvement of the choroid and retinal nerve fiber layer (RNFL) in COVID-19 patients using spectral domain optical coherence tomography. Methods: This cross-sectional study was conducted between April and June 2020. 40 patients (23 female and 17 male) with COVID-19 and 42 healthy individuals (26 female and 16 male) were included in the study. The OCT scans were performed 4 weeks after the COVID-19 diagnosis. Results: In the COVID-19 group, in the right eyes, the mean nasal choroidal thickness was 295.70 ± 7,046 μm ( p = 0.017), mean subfoveal choroidal thickness was 333.25 ± 6,353 μm ( p = 0.003), mean temporal choroidal thickness was 296.63 ± 6,324 μm ( p = 0.039), and mean RNFL was 89.23 ± 1.30 μm ( p = 0.227). In the left eyes, mean nasal choroidal thickness was 287.88 ± 9,033 μm ( p = 0.267), mean subfoveal choroidal thickness was 333.80 ± 9,457 μm ( p = 0.013), mean temporal choroidal thickness was 298.50 ± 9,158 μm ( p = 0.079), and mean RNFL was 89.48 ± 1,289 μm ( p = 0.092). Compared with the control group, the patient group had significant thickening of the choroidal thickness in all quadrants of the right eyes, and significant thickening of the subfoveal choroidal thickness in the left eyes. There was no significant difference in the RNFL thickness between groups ( p > 0.05). Conclusion: COVID-19 may cause a subclinical involvement in the choroidal layer.
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Affiliation(s)
- Kürşad Ramazan Zor
- Department of Ophthalmology, School of Medicine, Niğde Ömer Halisdemir University, Niğde, Turkey
| | - Gamze Yıldırım Biçer
- Department of Ophthalmology, School of Medicine, Niğde Ömer Halisdemir University, Niğde, Turkey
| | - Nesrin Tutaş Günaydın
- Department of Ophthalmology, Kartal Dr. Lütfi Kırdar City Hospital, Istanbul, Turkey
| | - Erkut Küçük
- Department of Ophthalmology, School of Medicine, Niğde Ömer Halisdemir University, Niğde, Turkey
| | - Uğur Yılmaz
- Department of Ophthalmology, School of Medicine, Pamukkale University, Denizli, Turkey
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22
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Mo C, Ke J, Zhao D, Zhang B. Role of the renin-angiotensin-aldosterone system in bone metabolism. J Bone Miner Metab 2020; 38:772-779. [PMID: 32734523 DOI: 10.1007/s00774-020-01132-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 07/13/2020] [Indexed: 12/12/2022]
Abstract
With the acceleration of population aging, the incidence of osteoporosis has gradually increased, and osteoporosis and fractures caused by osteoporosis have gradually become a serious social public health problem. The classic role of the renin-angiotensin-aldosterone system (RAAS) is to keep blood pressure stable. However, as the components of RAAS were found in bone tissues, their functions of stimulating osteoclast formation and inhibiting osteoblast activity thus inducing bone loss have gradually emerged. RAAS blockers can prevent osteoporotic fractures which may be related to angiotensin type 1 (AT1) receptor, osteoprotegerin (OPG)/nuclear factor-κB ligand (RANKL), and angiotensin-converting enzyme 2 (ACE2)/angiotensin (1-7) (Ang (1-7))/G protein-coupled receptor (Mas) cascade. However, some studies suggest that RAAS blockers do not prevent osteoporotic fractures. This article reviews the effects of RAAS and RAAS inhibitors on bone metabolism and provides new ideas for the prevention of osteoporosis.
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Affiliation(s)
- Caiyan Mo
- Beijing Key Laboratory of Diabetes Research and Care, Center for Endocrine Metabolism and Immune Diseases, Lu He Hospital, Capital Medical University, Beijing, China
| | - Jing Ke
- Beijing Key Laboratory of Diabetes Research and Care, Center for Endocrine Metabolism and Immune Diseases, Lu He Hospital, Capital Medical University, Beijing, China
| | - Dong Zhao
- Beijing Key Laboratory of Diabetes Research and Care, Center for Endocrine Metabolism and Immune Diseases, Lu He Hospital, Capital Medical University, Beijing, China.
| | - Baoyu Zhang
- Beijing Key Laboratory of Diabetes Research and Care, Center for Endocrine Metabolism and Immune Diseases, Lu He Hospital, Capital Medical University, Beijing, China.
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Paggiaro AO, Carvalho VF, Gemperli R. Effect of different human tissue processing techniques on SARS-CoV-2 inactivation-review. Cell Tissue Bank 2020; 22:1-10. [PMID: 33033963 PMCID: PMC7543962 DOI: 10.1007/s10561-020-09869-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 09/25/2020] [Indexed: 12/17/2022]
Abstract
The safety of the tissue transplant recipient is a top priority for tissue banks, and the emergence of the new coronavirus SARS-CoV-2 has raised significant concerns about the risks of releasing tissue for clinical use. In the present study, we conducted a literature review about the potential infectivity of SARS-CoV-2 in different biological tissues and the influence of various tissue processing and sterilization procedures on viral inactivation. The search revealed that SARS-CoV-2 binds to the human angiotensin-converting enzyme receptor to penetrate human cells. These receptors are present in skin cells, musculoskeletal tissue, amniotic membranes, cardiovascular tissue and ocular tissues, including the cornea. In general, we found that coronaviruses are stable at low temperatures, and inactivated upon exposure to extreme heat and pH. Notably, gamma irradiation, which has already been employed to inactivate SARS and MERS, could be useful for sterilizing skin, amnion and musculoskeletal tissues against SARS-CoV-2. We conclude that due to the limited information about the effects of physical and chemical tissue processing methods on viral neutralization, rigorous donor screening is still essential for tissue transplant recipient safety.
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Affiliation(s)
- André Oliveira Paggiaro
- ICHC Tissue Bank-HCFMUSP, Eneas de Carvalho, São Paulo, 05403-000, Brazil. .,Plastic Surgery Department-HCFMUSP, Universidade de São Paulo, São Paulo, 07023-070, Brazil. .,Nursing Post Graduation-Universidade Guarulhos, Guarulhos, 05403-000, Brazil.
| | | | - Rolf Gemperli
- Plastic Surgery Department-HCFMUSP, Universidade de São Paulo, São Paulo, 07023-070, Brazil
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Oxidative Stress and Vascular Dysfunction in the Retina: Therapeutic Strategies. Antioxidants (Basel) 2020; 9:antiox9080761. [PMID: 32824523 PMCID: PMC7465265 DOI: 10.3390/antiox9080761] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 12/14/2022] Open
Abstract
Many retinal diseases, such as diabetic retinopathy, glaucoma, and age-related macular (AMD) degeneration, are associated with elevated reactive oxygen species (ROS) levels. ROS are important intracellular signaling molecules that regulate numerous physiological actions, including vascular reactivity and neuron function. However, excessive ROS formation has been linked to vascular endothelial dysfunction, neuron degeneration, and inflammation in the retina. ROS can directly modify cellular molecules and impair their function. Moreover, ROS can stimulate the production of inflammatory cytokines, such as tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) causing inflammation and cell death. However, there are various compounds with direct or indirect antioxidant activity that have been used to reduce ROS accumulation in animal models and humans. In this review, we report on the physiological and pathophysiological role of ROS in the retina with a special focus on the vascular system. Moreover, we present therapeutic approaches for individual retinal diseases targeting retinal signaling pathways involving ROS.
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25
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Holappa M, Vapaatalo H, Vaajanen A. Local ocular renin-angiotensin-aldosterone system: any connection with intraocular pressure? A comprehensive review. Ann Med 2020; 52:191-206. [PMID: 32308046 PMCID: PMC7877937 DOI: 10.1080/07853890.2020.1758341] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/15/2020] [Indexed: 12/28/2022] Open
Abstract
The renin-angiotensin system (RAS) is one of the oldest and most extensively studied human peptide cascades, well-known for its role in regulating blood pressure. When aldosterone is included, RAAS is involved also in fluid and electrolyte homeostasis. There are two main axes of RAAS: (1) Angiotensin (1-7), angiotensin converting enzyme 2 and Mas receptor (ACE2-Ang(1-7)-MasR), (2) Angiotensin II, angiotensin converting enzyme 1 and angiotensin II type 1 receptor (ACE1-AngII-AT1R). In its entirety, RAAS comprises dozens of angiotensin peptides, peptidases and seven receptors. The first mentioned axis is known to counterbalance the deleterious effects of the latter axis. In addition to the systemic RAAS, tissue-specific regulatory systems have been described in various organs, evidence that RAAS is both an endocrine and an autocrine system. These local regulatory systems, such as the one present in the vascular endothelium, are responsible for long-term regional changes. A local RAAS and its components have been detected in many structures of the human eye. This review focuses on the local ocular RAAS in the anterior part of the eye, its possible role in aqueous humour dynamics and intraocular pressure as well as RAAS as a potential target for anti-glaucomatous drugs.KEY MESSAGESComponents of renin-angiotensin-aldosterone system have been detected in different structures of the human eye, introducing the concept of a local intraocular renin-angiotensin-aldosterone system (RAAS).Evidence is accumulating that the local ocular RAAS is involved in aqueous humour dynamics, regulation of intraocular pressure, neuroprotection and ocular pathology making components of RAAS attractive candidates when developing new effective ways to treat glaucoma.
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Affiliation(s)
- Mervi Holappa
- Medical Faculty, Department of Pharmacology, University of Helsinki, Helsinki, Finland
| | - Heikki Vapaatalo
- Medical Faculty, Department of Pharmacology, University of Helsinki, Helsinki, Finland
| | - Anu Vaajanen
- Department of Ophthalmology, Helsinki University Hospital, Helsinki, Finland
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26
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Jones L, Walsh K, Willcox M, Morgan P, Nichols J. The COVID-19 pandemic: Important considerations for contact lens practitioners. Cont Lens Anterior Eye 2020; 43:196-203. [PMID: 32273245 PMCID: PMC7129028 DOI: 10.1016/j.clae.2020.03.012] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 03/29/2020] [Accepted: 03/29/2020] [Indexed: 01/08/2023]
Abstract
A novel coronavirus (CoV), the Severe Acute Respiratory Syndrome Coronavirus - 2 (SARS-CoV-2), results in the coronavirus disease 2019 (COVID-19). As information concerning the COVID-19 disease continues to evolve, patients look to their eye care practitioners for accurate eye health guidance. There is currently no evidence to suggest an increased risk of contracting COVID-19 through contact lens (CL) wear compared to spectacle lens wear and no scientific evidence that wearing standard prescription spectacles provides protection against COVID-19 or other viral transmissions. During the pandemic there will potentially be significant changes in access to local eyecare. Thus, it is imperative CL wearers are reminded of the steps they should follow to minimise their risk of complications, to reduce their need to leave isolation and seek care. Management of adverse events should be retained within optometric systems if possible, to minimise the impact on the wider healthcare service, which will be stretched. Optimal CL care behaviours should be the same as those under normal circumstances, which include appropriate hand washing (thoroughly with soap and water) and drying (with paper towels) before both CL application and removal. Daily CL cleaning and correct case care for reusable CL should be followed according to appropriate guidelines, and CL exposure to water must be avoided. Where the availability of local clinical care is restricted, practitioners could consider advising patients to reduce or eliminate sleeping in their CL (where patients have the appropriate knowledge about correct daily care and access to suitable lens-care products) or consider the option of moving patients to daily disposable lenses (where patients have appropriate lens supplies available). Patients should also avoid touching their face, including their eyes, nose and mouth, with unwashed hands and avoid CL wear altogether if unwell (particularly with any cold or flu-like symptoms).
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Affiliation(s)
- Lyndon Jones
- School of Optometry & Vision Science, Centre for Ocular Research & Education (CORE), University of Waterloo, Waterloo, Ontario, Canada.
| | - Karen Walsh
- Centre for Ocular Research & Education (CORE), University of Waterloo, Waterloo, Ontario, Canada.
| | - Mark Willcox
- School of Optometry and Vision Science, UNSW, Sydney, Australia.
| | | | - Jason Nichols
- University of Alabama at Birmingham, Birmingham, AL, USA.
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Ramírez-Montero C, Lima-Gómez V, Anguiano-Robledo L, Hernández-Campos ME, López-Sánchez P. Preeclampsia as predisposing factor for hypertensive retinopathy: Participation by the RAAS and angiogenic factors. Exp Eye Res 2020; 193:107981. [PMID: 32088240 DOI: 10.1016/j.exer.2020.107981] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/17/2020] [Accepted: 02/17/2020] [Indexed: 12/26/2022]
Abstract
Preeclampsia (PE) is a hypertensive complication of pregnancy. Its cause is still unknown and it could be a risk factor for future ophthalmic problems. Retinal vascular bed alterations have been described as a consequence of PE, suggesting a retinopathy. Factors related to angiogenesis and vascular permeability, such as vascular endothelial growth factor (VEGF) and pigment epithelium derived factor (PEDF) or components of the renin angiotensin aldosterone system (RAAS), prorrenin/renin receptor ((P)RR) and angiotensin II type I receptor (AT1R) have been located in the retina, participating in other retinopathies, but it is unknown if they could participate in PE. Our aim was to elucidate whether VEGF, PEDF, (P)RR and AT1R could be modified during PE and during hypertension induced in rats with a history of PE. We used female Wistar rats and subrrenal aortic coarctation to induce PE, and after delivery, we induced a second hit by Nω-nitro-L-arginine methyl ester (L-NAME) administration. We measured blood pressure, proteinuria and pups development. In both models, eye fundal exploration and immunoblot for VEGF, PEDF, (P)RR and AT1R were performed. We found that the development of hypertension occurred faster in previously PE rats than in normal animals. VEGF, PEDF, (P)RR and AT1R were increased in PE, but in L-NAME-induced hypertension only (P)RR and AT1R were altered. Eye fundal data indicated that PE induced a level I retinopathy, but L-NAME induced a faster and more severe retinopathy in previously PE animals compared to previously normal pregnancy rats. These results indicate that PE predisposes to development of a faster and more severe retinopathy after a second hit. They also suggest that VEGF and PEDF seem to participate only in PE retinopathy, but in both models, RAAS components seem to have a more critical participation.
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Affiliation(s)
- Claudia Ramírez-Montero
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina Del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Casco de Santo Tomás, Ciudad de México, 11340, Mexico.
| | - Virgilio Lima-Gómez
- Servicio de Oftalmología, Hospital Juárez de México Norte, Av. Instituto Politécnico Nacional 5160, Col. Magdalena de la Salinas, Del. Gustavo A. Madero, C.P 07760, Mexico.
| | - Liliana Anguiano-Robledo
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina Del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Casco de Santo Tomás, Ciudad de México, 11340, Mexico.
| | - María Elena Hernández-Campos
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina Del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Casco de Santo Tomás, Ciudad de México, 11340, Mexico.
| | - Pedro López-Sánchez
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina Del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Casco de Santo Tomás, Ciudad de México, 11340, Mexico.
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Allingham MJ, Mettu PS, Cousins SW. Aldosterone as a mediator of severity in retinal vascular disease: Evidence and potential mechanisms. Exp Eye Res 2019; 188:107788. [PMID: 31479654 PMCID: PMC6802292 DOI: 10.1016/j.exer.2019.107788] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 08/30/2019] [Indexed: 12/27/2022]
Abstract
Diabetic retinopathy (DR) and retinal vein occlusion (RVO) are the two most common retinal vascular diseases and are major causes of vision loss and blindness worldwide. Recent and ongoing development of medical therapies including anti-vascular endothelial growth factor and corticosteroid drugs for treatment of these diseases have greatly improved the care of afflicted patients. However, severe manifestations of retinal vascular disease result in persistent macular edema, progressive retinal ischemia and incomplete visual recovery. Additionally, choroidal vascular diseases including neovascular age-related macular degeneration (NVAMD) and central serous chorioretinopathy (CSCR) cause vision loss for which current treatments are incompletely effective in some cases and highly burdensome in others. In recent years, aldosterone has gained attention as a contributor to the various deleterious effects of retinal and choroidal vascular diseases via a variety of mechanisms in several retinal cell types. The following is a review of the role of aldosterone in retinal and choroidal vascular diseases as well as our current understanding of the mechanisms by which aldosterone mediates these effects.
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Affiliation(s)
- Michael J Allingham
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, United States.
| | - Priyatham S Mettu
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, United States
| | - Scott W Cousins
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, United States
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DECREASED RETINAL CAPILLARY DENSITY IS ASSOCIATED WITH A HIGHER RISK OF DIABETIC RETINOPATHY IN PATIENTS WITH DIABETES. Retina 2019; 39:1710-1719. [DOI: 10.1097/iae.0000000000002232] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wilkinson-Berka JL, Suphapimol V, Jerome JR, Deliyanti D, Allingham MJ. Angiotensin II and aldosterone in retinal vasculopathy and inflammation. Exp Eye Res 2019; 187:107766. [PMID: 31425690 DOI: 10.1016/j.exer.2019.107766] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 08/14/2019] [Accepted: 08/15/2019] [Indexed: 12/18/2022]
Abstract
Angiotensin II and aldosterone are the main effectors of the renin-angiotensin aldosterone system (RAAS) and have a central role in hypertension as well as cardiovascular and renal disease. The localization of RAAS components within the retina has led to studies investigating the roles of angiotensin II, aldosterone and the counter regulatory arm of the pathway in vision-threatening retinopathies. This review will provide a brief overview of RAAS components as well as the vascular pathology that develops in the retinal diseases, retinopathy of prematurity, diabetic retinopathy and neovascular age-related macular degeneration. The review will discuss pre-clinical and clinical evidence that modulation of the RAAS alters the development of vasculopathy and inflammation in the aforementioned retinopathies, as well as the emerging role of aldosterone and the mineralocorticoid receptor in central serous chorioretinopathy.
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Affiliation(s)
- Jennifer L Wilkinson-Berka
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Victoria, Australia; Department of Diabetes, The Central Clinical School, Monash University, Melbourne, Victoria, Australia.
| | - Varaporn Suphapimol
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Victoria, Australia; Department of Diabetes, The Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Jack R Jerome
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Victoria, Australia; Department of Diabetes, The Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Devy Deliyanti
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Victoria, Australia; Department of Diabetes, The Central Clinical School, Monash University, Melbourne, Victoria, Australia
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Choi JA, Kim JE, Ju HH, Lee J, Jee D, Park CK, Paik SY. The effects of losartan on cytomegalovirus infection in human trabecular meshwork cells. PLoS One 2019; 14:e0218471. [PMID: 31216320 PMCID: PMC6584002 DOI: 10.1371/journal.pone.0218471] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 06/03/2019] [Indexed: 12/11/2022] Open
Abstract
Background Human cytomegalovirus (CMV) has been emerged as one of the causes of acute recurrent or chronic hypertensive anterior uveitis in immunocompetent. In hypertensive anterior uveitis, human trabecular meshwork (TM) cells are considered a focus of inflammation. We investigated the effects of losartan, a selective angiotensin II receptor antagonist, on CMV infection in human TM cells. Methods Human TM cells were infected with CMV AD169. Virus infected and mock-infected cells were treated with losartan or dexamethasone or ganciclovir with or without transforming growth factor (TGF)-β1. Viral DNA accumulation and host cell response were analyzed using real-time PCR. Levels of secreted TGF-β1 were measured by determining its concentration in conditioned medium using a commercially available sandwich enzyme-linked immunosorbent assay (ELISA) kits. Results CMV infection significantly increased the concentrations of the secreted TGF-β1 at 3, 5, and 7 day post infection in TM cells. Treatment with dexamethasone or losartan significantly decreased the levels of TGF-β1, whereas treatment with ganciclovir did not affect TGF-β1 levels. TM cells treated with TGF-β1 along with the presence of losartan for 48 hours showed marked decrease in the expression of α-smooth muscle actin (SMA), lysyl oxidase (LOX), connective tissue growth factor (CTGF), fibronectin and collagen-1A, compared with cells treated with TGF-β1 alone. CMV-infected TM cells stimulated by TGF-β1 significantly increased the expression of α-SMA and CTGF, which were attenuated by additional treatment with losartan. Conclusion Losartan inhibited the expression of TGF-β1 and fibrogenic molecules in human TM cells. Thus, losartan has the potential to decrease TM fibrosis in patients with CMV-induced hypertensive anterior uveitis.
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Affiliation(s)
- Jin A. Choi
- Department of Ophthalmology, College of Medicine, St. Vincent’s Hospital, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ju-Eun Kim
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyun-hee Ju
- Department of Ophthalmology, College of Medicine, St. Vincent’s Hospital, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jiyoung Lee
- Department of Ophthalmology, College of Medicine, St. Vincent’s Hospital, The Catholic University of Korea, Seoul, Republic of Korea
| | - Donghyun Jee
- Department of Ophthalmology, College of Medicine, St. Vincent’s Hospital, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chan Kee Park
- Department of Ophthalmology, College of Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, Republic of Korea
- * E-mail: (CKP); (SYP)
| | - Soon-young Paik
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- * E-mail: (CKP); (SYP)
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Shree J, Choudhary R, Bodakhe SH. Losartan delays the progression of streptozotocin‐induced diabetic cataracts in albino rats. J Biochem Mol Toxicol 2019; 33:e22342. [DOI: 10.1002/jbt.22342] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 03/15/2019] [Accepted: 03/25/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Jaya Shree
- Department of Pharmacology, SLT Institute of Pharmaceutical SciencesGuru Ghasidas Vishwavidyalaya Bilaspur Chhattisgarh India
| | - Rajesh Choudhary
- Department of Pharmacology, SLT Institute of Pharmaceutical SciencesGuru Ghasidas Vishwavidyalaya Bilaspur Chhattisgarh India
| | - Surendra H Bodakhe
- Department of Pharmacology, SLT Institute of Pharmaceutical SciencesGuru Ghasidas Vishwavidyalaya Bilaspur Chhattisgarh India
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Kim D, Pattamatta U, Kelly E, Healey PR, Carnt N, Zoellner H, White AJR. Inhibitory Effects of Angiotensin II Receptor Blockade on Human Tenon Fibroblast Migration and Reactive Oxygen Species Production in Cell Culture. Transl Vis Sci Technol 2018; 7:20. [PMID: 29657902 PMCID: PMC5896341 DOI: 10.1167/tvst.7.2.20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 02/25/2018] [Indexed: 01/02/2023] Open
Abstract
Purpose We investigate the effect of angiotensin receptor blockade on the migration of human Tenon fibroblasts (HTF), using irbesartan, an angiotensin II receptor type 1 (AT1R) blocker (ARB) as a potential antifibrotic agent in glaucoma filtration surgery. Methods Confluent HTF cultures were scratched with a 1 mL pipette tip and treated with either irbesartan (10, 50, and 100 μg/mL) or angiotensin II (2 μg/mL). The extent of HTF migration up to 30 hours, and cell number and morphology at 72 hours was evaluated. To assess the effect on reactive oxygen species (ROS) level, HTF were treated with either irbesartan (10 μg/mL) or angiotensin II (2 μg/mL) for 24 hours after scratching, and then stained with dihydroethidium (DHE) before evaluation by confocal microscopy. Results Irbesartan inhibited HTF migration by 50% to 70% compared to controls (P < 0.05). Levels of ROS were almost completely attenuated by irbesartan (DHE fluorescence intensity of 5.68E-09) (P < 0.05). Irbesartan reduced cell numbers by 50% and induced morphologic changes with loss of pseudopods (P < 0.05). Conversely, angiotensin II increased cell numbers up to 4-fold while retaining cell viability. Conclusions Irbesartan inhibited HTF migration and ROS production. It also reduced cell numbers and altered HTF morphology. Angiotensin II increased cell number without altering morphology. This initial study warrants future investigations for further potential antifibrotic effects of this drug. Translational Relevance This in vitro study focused on investigations of irbesartan's effects on HTF migration, ROS production, as well as HTF cell numbers and morphology. It suggests a potential therapeutic strategy worth further exploration with a view towards postoperative wound healing modulation in glaucoma filtration surgery.
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Affiliation(s)
- Duri Kim
- Centre for Vision Research, the Westmead Institute for Medical Research, Sydney Medical School, University of Sydney, New South Wales, Australia
| | - Ushasree Pattamatta
- Centre for Vision Research, the Westmead Institute for Medical Research, Sydney Medical School, University of Sydney, New South Wales, Australia
| | - Elizabeth Kelly
- The Cellular and Molecular Pathology Research Unit, Department of Oral Pathology, Faculty of Dentistry, University of Sydney, Westmead Hospital, New South Wales, Australia
| | - Paul R Healey
- Centre for Vision Research, the Westmead Institute for Medical Research, Sydney Medical School, University of Sydney, New South Wales, Australia.,Department of Ophthalmology, Westmead Hospital, Sydney, New South Wales, Australia.,Save Sight Institute, Sydney Medical School, University of Sydney, New South Wales, Australia
| | - Nicole Carnt
- Centre for Vision Research, the Westmead Institute for Medical Research, Sydney Medical School, University of Sydney, New South Wales, Australia
| | - Hans Zoellner
- The Cellular and Molecular Pathology Research Unit, Department of Oral Pathology, Faculty of Dentistry, University of Sydney, Westmead Hospital, New South Wales, Australia
| | - Andrew J R White
- Centre for Vision Research, the Westmead Institute for Medical Research, Sydney Medical School, University of Sydney, New South Wales, Australia.,Department of Ophthalmology, Westmead Hospital, Sydney, New South Wales, Australia.,Save Sight Institute, Sydney Medical School, University of Sydney, New South Wales, Australia
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Igić R. Four decades of ocular renin-angiotensin and kallikrein-kinin systems (1977–2017). Exp Eye Res 2018; 166:74-83. [DOI: 10.1016/j.exer.2017.05.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/09/2017] [Accepted: 05/20/2017] [Indexed: 12/31/2022]
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Oxidative stress and reactive oxygen species: a review of their role in ocular disease. Clin Sci (Lond) 2017; 131:2865-2883. [DOI: 10.1042/cs20171246] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/26/2017] [Accepted: 11/06/2017] [Indexed: 12/13/2022]
Abstract
For many years, oxidative stress arising from the ubiquitous production of reactive oxygen species (ROS) has been implicated in the pathogenesis of various eye diseases. While emerging research has provided some evidence of the important physiological role of ROS in normal cell function, disease may arise where the concentration of ROS exceeds and overwhelms the body’s natural defence against them. Additionally, ROS may induce genomic aberrations which affect cellular homoeostasis and may result in disease. This literature review examines the current evidence for the role of oxidative stress in important ocular diseases with a view to identifying potential therapeutic targets for future study. The need is particularly pressing in developing treatments for conditions which remain notoriously difficult to treat, including glaucoma, diabetic retinopathy and age-related macular degeneration.
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Yazgan S, Erboy F, Celik HU, Ornek T, Ugurbas SH, Kokturk F, Ayar O, Akdemir MO, Celik E. Peripapillary Choroidal Thickness and Retinal Nerve Fiber Layer in Untreated Patients with Obstructive Sleep Apnea-Hypopnea Syndrome: A Case-Control Study. Curr Eye Res 2017; 42:1552-1560. [PMID: 28910165 DOI: 10.1080/02713683.2016.1266661] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE To evaluate peripapillary choroidal thickness (PPCT), central macular choroidal thickness (CMCT), and retinal nerve fiber layer (RNFL) thickness in untreated patients with obstructive sleep apnea-hypopnea syndrome (OSAHS). METHODS This prospective, randomized, and comparative study was conducted in a university ophthalmology clinic. 106 eyes of 106 patients with OSAHS and 44 eyes of 44 healthy individuals were evaluated in this study. Only right eyes were evaluated. The patients with OSAHS were divided into three groups as mild (group 1), moderate (group 2), and severe (group 3) according to apnea-hypopnea index. The PPCT, CMCT, and RNFL measurements were performed by using spectral domain optical coherence tomography with enhanced depth imaging technique. The main parameters assessed were PPCT-Temporal, PPCT-Superior, PPCT-Nasal, PPCT-Inferior quadrants, CMCT, and RNFL thicknesses. RESULTS The PPCT of all quadrants was significantly thicker in the control group compared with the moderate and severe subgroups of OSAHS (p < 0.05). The PPCT-Superior and PPCT-Temporal were significantly thinner in the mild subgroup compared with the control group (p = 0.003 and p = 0.028, respectively). There was no difference between the control and mild groups regarding the RNFL thicknesses except nasal RNFL and inferotemporal RNFL which are thinner in the mild group. The RNFL thicknesses of all quadrants were significantly thicker in the control group compared with moderate and severe subgroups (p < 0.05). The CMCT was significantly thicker in the control group compared with all subgroups of OSAHS (p < 0.05). CONCLUSIONS In OSAHS patients, PPCT, CMCT, and RNFL were significantly thinner compared with the control group. These results may explain why OSAHS patients are prone to normotensive glaucoma.
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Affiliation(s)
- Serpil Yazgan
- a Medical Faculty, Department of Ophthalmology , Bulent Ecevit University , Zonguldak , Turkey
| | - Fatma Erboy
- b Medical Faculty, Department of Ophthalmology , Medeniyet University , Istanbul , Turkey
| | - Haci Ugur Celik
- c Medical Faculty, Department of Thoracic Medicine , Bulent Ecevit University , Zonguldak , Turkey
| | - Tacettin Ornek
- b Medical Faculty, Department of Ophthalmology , Medeniyet University , Istanbul , Turkey
| | - Suat Hayri Ugurbas
- a Medical Faculty, Department of Ophthalmology , Bulent Ecevit University , Zonguldak , Turkey
| | - Firuzan Kokturk
- d Medical Faculty, Department of Biostastics , Bülent Ecevit University , Zonguldak , Turkey
| | - Orhan Ayar
- a Medical Faculty, Department of Ophthalmology , Bulent Ecevit University , Zonguldak , Turkey
| | - Mehmet Orcun Akdemir
- a Medical Faculty, Department of Ophthalmology , Bulent Ecevit University , Zonguldak , Turkey
| | - Erkan Celik
- a Medical Faculty, Department of Ophthalmology , Bulent Ecevit University , Zonguldak , Turkey
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Holappa M, Vapaatalo H, Vaajanen A. Many Faces of Renin-angiotensin System - Focus on Eye. Open Ophthalmol J 2017; 11:122-142. [PMID: 28761566 PMCID: PMC5510558 DOI: 10.2174/1874364101711010122] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 05/17/2017] [Accepted: 05/25/2017] [Indexed: 12/18/2022] Open
Abstract
The renin-angiotensin system (RAS), that is known for its role in the regulation of blood pressure as well as in fluid and electrolyte homeostasis, comprises dozens of angiotensin peptides and peptidases and at least six receptors. Six central components constitute the two main axes of the RAS cascade. Angiotensin (1-7), an angiotensin converting enzyme 2 and Mas receptor axis (ACE2-Ang(1-7)-MasR) counterbalances the harmful effects of the angiotensin II, angiotensin converting enzyme 1 and angiotensin II type 1 receptor axis (ACE1-AngII-AT1R) Whereas systemic RAS is an important factor in blood pressure regulation, tissue-specific regulatory system, responsible for long term regional changes, that has been found in various organs. In other words, RAS is not only endocrine but also complicated autocrine system. The human eye has its own intraocular RAS that is present e.g. in the structures involved in aqueous humor dynamics. Local RAS may thus be a target in the development of new anti-glaucomatous drugs. In this review, we first describe the systemic RAS cascade and then the local ocular RAS especially in the anterior part of the eye.
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Affiliation(s)
- Mervi Holappa
- BioMediTech, University of Tampere, Tampere, Finland
| | - Heikki Vapaatalo
- Medical Faculty, Department of Pharmacology, University of Helsinki, 00014 Helsinki, Finland
| | - Anu Vaajanen
- Department of Ophthalmology, Tampere University Hospital, Tampere, Finland.,SILK, Department of Ophthalmology, School of Medicine, University of Tampere, Tampere, Finland
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Abstract
Heart failure and chronic renal diseases are usually progressive and only partially amenable to therapy. These disorders can be the sequelae of hypertension or worsened by hypertension. They are associated with the tissue up-regulation of multiple peptides, many of which are capable of acting within the cell interior. This article proposes that these peptides, intracrines, can form self-sustaining regulatory loops that can spread through heart or kidney, producing progressive disease. Moreover, mineralocorticoid activation seems capable of amplifying some of these peptide networks. This view suggests an expanded explanation of the pathogenesis of progressive cardiorenal disease and suggests new approaches to treatment.
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Affiliation(s)
- Richard N Re
- Ochsner Clinic Foundation, Division of Research, 1514 Jefferson Highway, New Orleans, LA 70121, USA.
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Choudhary R, Kapoor MS, Singh A, Bodakhe SH. Therapeutic targets of renin-angiotensin system in ocular disorders. J Curr Ophthalmol 2016; 29:7-16. [PMID: 28367520 PMCID: PMC5362395 DOI: 10.1016/j.joco.2016.09.009] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 09/27/2016] [Accepted: 09/30/2016] [Indexed: 12/16/2022] Open
Abstract
Purpose To review current literature on the renin-angiotensin system (RAS)-mediated pathogenic mechanisms and therapeutic targets in ocular diseases. Methods A comprehensive literature survey was performed on PubMed, Scopus, and Google Scholar databases published from 1977 to 2016. The search terms were a RAS, angiotensin, angiotensin receptor, prorenin, pro (renin) receptor, angiotensin converting enzyme inhibitor, angiotensin receptor blocker associated with ocular disorders like cataract, glaucoma, diabetic retinopathy (DR), macular degeneration, and uveitis. Articles were reviewed on the basis of the association between ocular disorders and RAS and relevant articles were discussed. Results The literature revealed that the individual RAS components including renin, angiotensins, angiotensin converting enzymes, and RAS receptors have been expressed in the specific ocular tissues like retina, choroid, and ciliary body. The activation of both circulatory and local RAS potentiate the various inflammatory and angiogenic signaling molecules, including vascular endothelial growth factor (VEGF), extracellular signal-regulated kinase, and advanced glycation end products (AGE) in the ocular tissues and leads to several blinding disorders like DR, glaucoma, and macular degeneration. The classical and newer RAS inhibitors have illustrated protective effects on blinding disorders, including DR, glaucoma, macular degeneration, uveitis, and cataract. Conclusions The RAS components are present in the extrarenal tissues including ocular tissue and have an imperative role in the ocular pathophysiology. The clinical studies are needed to show the role of therapeutic modalities targeting RAS in the treatment of different ocular disorders.
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Simão S, Santos DF, Silva GA. Aliskiren inhibits the renin-angiotensin system in retinal pigment epithelium cells. Eur J Pharm Sci 2016; 92:22-7. [DOI: 10.1016/j.ejps.2016.06.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 06/16/2016] [Accepted: 06/21/2016] [Indexed: 01/06/2023]
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Ángel-Pereira D, Rocha-Cabrera P, Cordovés-Dorta L, Losada Castillo MJ, Blasco Alberto A, Abreu Reyes JA. Spironolactone, a therapeutic alternative in the treatment of diffuse retinal pigment epitheliopathy. ACTA ACUST UNITED AC 2016; 91:599-603. [PMID: 27017536 DOI: 10.1016/j.oftal.2016.02.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/08/2016] [Accepted: 02/11/2016] [Indexed: 11/29/2022]
Abstract
CASE REPORT Two cases are presented of patients with chronic diffuse epitheliopathy (CDE) that showed a favourable response when treated with spironolactone. The first patient had regions of neurosensory detachment (DNS) and the second, multiple DNS, secondary intra-retinal cysts and retinal pigment epithelium detachment. DISCUSSION After treatment with spironolactone, both patients showed a visual acuity improvement and structural changes (reduced neurosensory retinal detachment and cystoid degeneration). Aldosterone receptor agonists (ARA) used for persistent forms of chronic central serous chorioretinopathy show encouraging results and could represent a therapeutic alternative for CDE.
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Affiliation(s)
- D Ángel-Pereira
- Servicio de Oftalmología, Hospital Universitario de Canarias, La Laguna, Tenerife, España.
| | - P Rocha-Cabrera
- Servicio de Oftalmología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - L Cordovés-Dorta
- Servicio de Oftalmología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - M J Losada Castillo
- Servicio de Oftalmología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - A Blasco Alberto
- Servicio de Oftalmología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
| | - J A Abreu Reyes
- Servicio de Oftalmología, Hospital Universitario de Canarias, La Laguna, Tenerife, España
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Mazade RE, Eggers ED. Light adaptation alters inner retinal inhibition to shape OFF retinal pathway signaling. J Neurophysiol 2016; 115:2761-78. [PMID: 26912599 DOI: 10.1152/jn.00948.2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 02/20/2016] [Indexed: 12/18/2022] Open
Abstract
The retina adjusts its signaling gain over a wide range of light levels. A functional result of this is increased visual acuity at brighter luminance levels (light adaptation) due to shifts in the excitatory center-inhibitory surround receptive field parameters of ganglion cells that increases their sensitivity to smaller light stimuli. Recent work supports the idea that changes in ganglion cell spatial sensitivity with background luminance are due in part to inner retinal mechanisms, possibly including modulation of inhibition onto bipolar cells. To determine how the receptive fields of OFF cone bipolar cells may contribute to changes in ganglion cell resolution, the spatial extent and magnitude of inhibitory and excitatory inputs were measured from OFF bipolar cells under dark- and light-adapted conditions. There was no change in the OFF bipolar cell excitatory input with light adaptation; however, the spatial distributions of inhibitory inputs, including both glycinergic and GABAergic sources, became significantly narrower, smaller, and more transient. The magnitude and size of the OFF bipolar cell center-surround receptive fields as well as light-adapted changes in resting membrane potential were incorporated into a spatial model of OFF bipolar cell output to the downstream ganglion cells, which predicted an increase in signal output strength with light adaptation. We show a prominent role for inner retinal spatial signals in modulating the modeled strength of bipolar cell output to potentially play a role in ganglion cell visual sensitivity and acuity.
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Affiliation(s)
- Reece E Mazade
- Departments of Physiology and Biomedical Engineering, University of Arizona, Tucson, Arizona
| | - Erika D Eggers
- Departments of Physiology and Biomedical Engineering, University of Arizona, Tucson, Arizona
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Re RN. Age-Related Macular Degeneration and Intracrine Biology: An Hypothesis. Ochsner J 2016; 16:502-510. [PMID: 27999510 PMCID: PMC5158158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
This laboratory has studied the intracellular actions of angiotensin II and other signaling proteins that can act in the intracellular space-peptides/proteins we have called intracrines. Moreover, we have suggested that general principles of intracrine action exist and can help explain the progression of some chronic degenerative diseases such as diabetic nephropathy and congestive heart failure. Here, a similar analysis is carried out in the case of age-related macular degeneration. We propose that intracrine mechanisms are operative in this disorder. In particular, we hypothesize that intracrine loops involving renin, angiotensin II, transforming growth factor-beta, vascular endothelial growth factor, bone morphogenetic protein-4, and p53, among other factors, are involved. If this analysis is correct, it suggests a commonality of mechanism linking chronic progressive renal diseases, congestive heart failure, and macular degeneration.
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Affiliation(s)
- Richard N. Re
- Division of Academics–Research, Ochsner Clinic Foundation, New Orleans, LA
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Hennig R, Ohlmann A, Staffel J, Pollinger K, Haunberger A, Breunig M, Schweda F, Tamm ER, Goepferich A. Multivalent nanoparticles bind the retinal and choroidal vasculature. J Control Release 2015; 220:265-274. [DOI: 10.1016/j.jconrel.2015.10.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 10/15/2015] [Accepted: 10/16/2015] [Indexed: 10/22/2022]
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Holappa M, Vapaatalo H, Vaajanen A. Ocular renin-angiotensin system with special reference in the anterior part of the eye. World J Ophthalmol 2015; 5:110-124. [DOI: 10.5318/wjo.v5.i3.110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/21/2015] [Accepted: 06/16/2015] [Indexed: 02/06/2023] Open
Abstract
The renin-angiotensin system (RAS) regulates blood pressure (BP) homeostasis, systemic fluid volume and electrolyte balance. The RAS cascade includes over twenty peptidases, close to twenty angiotensin peptides and at least six receptors. Out of these, angiotensin II, angiotensin converting enzyme 1 and angiotensin II type 1 receptor (AngII-ACE1-AT1R) together with angiotensin (1-7), angiotensin converting enzyme 2 and Mas receptor (Ang(1-7)-ACE2-MasR) are regarded as the main components of RAS. In addition to circulating RAS, local RA-system exists in various organs. Local RA-systems are regarded as tissue-specific regulatory systems accounting for local effects and long term changes in different organs. Many of the central components such as the two main axes of RAS: AngII-ACE1-AT1R and Ang(1-7)-ACE2-MasR, have been identified in the human eye. Furthermore, it has been shown that systemic antihypertensive RAS- inhibiting medications lower intraocular pressure (IOP). These findings suggest the crucial role of RAS not only in the regulation of BP but also in the regulation of IOP, and RAS potentially plays a role in the development of glaucoma and antiglaucomatous drugs.
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